obs-studio/plugins/obs-outputs/librtmp/rtmp.c

/*
 *      Copyright (C) 2005-2008 Team XBMC
 *      http://www.xbmc.org
 *      Copyright (C) 2008-2009 Andrej Stepanchuk
 *      Copyright (C) 2009-2010 Howard Chu
 *
 *  This file is part of librtmp.
 *
 *  librtmp is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as
 *  published by the Free Software Foundation; either version 2.1,
 *  or (at your option) any later version.
 *
 *  librtmp is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with librtmp see the file COPYING.  If not, write to
 *  the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 *  Boston, MA  02110-1301, USA.
 *  http://www.gnu.org/copyleft/lgpl.html
 */

#ifndef NO_AUTH
#ifndef CRYPTO
#define USE_ONLY_MD5
#endif
#endif

#include "rtmp_sys.h"
#include "log.h"

#include <util/platform.h>

#if !defined(MSG_NOSIGNAL)
#define MSG_NOSIGNAL 0
#endif

#ifdef CRYPTO

#ifdef __APPLE__
#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
#endif

#if defined(USE_MBEDTLS)
#if defined(_WIN32)
#include <windows.h>
#include <wincrypt.h>
#elif defined(__APPLE__)
#include <Security/Security.h>
#endif

#include <mbedtls/ctr_drbg.h>
#include <mbedtls/md5.h>
#include <mbedtls/base64.h>
#define MD5_DIGEST_LENGTH 16

#elif defined(USE_POLARSSL)
#include <polarssl/havege.h>
#include <polarssl/md5.h>
#include <polarssl/base64.h>
#define MD5_DIGEST_LENGTH 16

static const char *my_dhm_P =
    "E4004C1F94182000103D883A448B3F80" \
    "2CE4B44A83301270002C20D0321CFD00" \
    "11CCEF784C26A400F43DFB901BCA7538" \
    "F2C6B176001CF5A0FD16D2C48B1D0C1C" \
    "F6AC8E1DA6BCC3B4E1F96B0564965300" \
    "FFA1D0B601EB2800F489AA512C4B248C" \
    "01F76949A60BB7F00A40B1EAB64BDD48" \
    "E8A700D60B7F1200FA8E77B0A979DABF";

static const char *my_dhm_G = "4";
#elif defined(USE_GNUTLS)
#include <gnutls/gnutls.h>
#define MD5_DIGEST_LENGTH 16
#include <nettle/base64.h>
#include <nettle/md5.h>
#else	/* USE_OPENSSL */
#include <openssl/ssl.h>
#include <openssl/md5.h>
#include <openssl/bio.h>
#include <openssl/buffer.h>
#endif

#endif

#define RTMP_SIG_SIZE 1536
#define RTMP_LARGE_HEADER_SIZE 12

static const int packetSize[] = { 12, 8, 4, 1 };

int RTMP_ctrlC;

const char RTMPProtocolStrings[][7] =
{
    "RTMP",
    "RTMPT",
    "RTMPE",
    "RTMPTE",
    "RTMPS",
    "RTMPTS",
    "",
    "",
    "RTMFP"
};

const char RTMPProtocolStringsLower[][7] =
{
    "rtmp",
    "rtmpt",
    "rtmpe",
    "rtmpte",
    "rtmps",
    "rtmpts",
    "",
    "",
    "rtmfp"
};

static const char *RTMPT_cmds[] =
{
    "open",
    "send",
    "idle",
    "close"
};

typedef enum
{
    RTMPT_OPEN=0, RTMPT_SEND, RTMPT_IDLE, RTMPT_CLOSE
} RTMPTCmd;

static int DumpMetaData(AMFObject *obj);
static int HandShake(RTMP *r, int FP9HandShake);
static int SocksNegotiate(RTMP *r);

static int SendConnectPacket(RTMP *r, RTMPPacket *cp);
static int SendCheckBW(RTMP *r);
static int SendCheckBWResult(RTMP *r, double txn);
static int SendDeleteStream(RTMP *r, double dStreamId);
static int SendFCSubscribe(RTMP *r, AVal *subscribepath);
static int SendPlay(RTMP *r, int streamIdx);
static int SendBytesReceived(RTMP *r);
static int SendUsherToken(RTMP *r, AVal *usherToken);
static int SendFCUnpublish(RTMP *r, int streamIdx);

#if 0				/* unused */
static int SendBGHasStream(RTMP *r, double dId, AVal *playpath);
#endif

static int HandleInvoke(RTMP *r, const char *body, unsigned int nBodySize);
static int HandleMetadata(RTMP *r, char *body, unsigned int len);
static void HandleChangeChunkSize(RTMP *r, const RTMPPacket *packet);
static void HandleAudio(RTMP *r, const RTMPPacket *packet);
static void HandleVideo(RTMP *r, const RTMPPacket *packet);
static void HandleCtrl(RTMP *r, const RTMPPacket *packet);
static void HandleServerBW(RTMP *r, const RTMPPacket *packet);
static void HandleClientBW(RTMP *r, const RTMPPacket *packet);

static int ReadN(RTMP *r, char *buffer, int n);
static int WriteN(RTMP *r, const char *buffer, int n);

static void DecodeTEA(AVal *key, AVal *text);

static int HTTP_Post(RTMP *r, RTMPTCmd cmd, const char *buf, int len);
static int HTTP_read(RTMP *r, int fill);

#if !defined(_WIN32) && !defined(_DEBUG)
static int clk_tck;
#endif

#ifdef CRYPTO
#include "handshake.h"
#endif

uint32_t
RTMP_GetTime()
{
#ifdef _DEBUG
    return 0;
#elif defined(_WIN32)
    return timeGetTime();
#else
    struct tms t;
    if (!clk_tck) clk_tck = sysconf(_SC_CLK_TCK);
    return times(&t) * 1000 / clk_tck;
#endif
}

const char *
socketerror(int err)
{
    static char buff[1024];

#ifdef _WIN32
    if (FormatMessageA (FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0, buff, sizeof(buff), NULL))
    {
        int i, len;
        buff[sizeof(buff)-1] = '\0';
        len = (int)strlen (buff);
        for (i = 0; i < len; i++)
        {
            if (buff[i] == '\r' || buff[i] == '\n')
            {
                memmove (buff + i, buff + i + 1, len - i);
                i--;
                len--;
            }
        }
        return buff;
    }
#else
    (void)err;
#endif

    strcpy (buff, "unknown error");
    return buff;
}

void
RTMP_UserInterrupt()
{
    RTMP_ctrlC = TRUE;
}

void
RTMPPacket_Reset(RTMPPacket *p)
{
    p->m_headerType = 0;
    p->m_packetType = 0;
    p->m_nChannel = 0;
    p->m_nTimeStamp = 0;
    p->m_nInfoField2 = 0;
    p->m_hasAbsTimestamp = FALSE;
    p->m_nBodySize = 0;
    p->m_nBytesRead = 0;
}

int
RTMPPacket_Alloc(RTMPPacket *p, uint32_t nSize)
{
    char *ptr;
#if ARCH_BITS == 32
    if (nSize > SIZE_MAX - RTMP_MAX_HEADER_SIZE)
        return FALSE;
#endif

    ptr = calloc(1, nSize + RTMP_MAX_HEADER_SIZE);
    if (!ptr)
        return FALSE;
    p->m_body = ptr + RTMP_MAX_HEADER_SIZE;
    p->m_nBytesRead = 0;
    return TRUE;
}

void
RTMPPacket_Free(RTMPPacket *p)
{
    if (p->m_body)
    {
        free(p->m_body - RTMP_MAX_HEADER_SIZE);
        p->m_body = NULL;
    }
}

void
RTMPPacket_Dump(RTMPPacket *p)
{
    RTMP_Log(RTMP_LOGDEBUG,
             "RTMP PACKET: packet type: 0x%02x. channel: 0x%02x. info 1: %d info 2: %d. Body size: %u. body: 0x%02x",
             p->m_packetType, p->m_nChannel, p->m_nTimeStamp, p->m_nInfoField2,
             p->m_nBodySize, p->m_body ? (unsigned char)p->m_body[0] : 0);
}

int
RTMP_LibVersion()
{
    return RTMP_LIB_VERSION;
}

void
RTMP_TLS_LoadCerts(RTMP *r) {
#ifdef USE_MBEDTLS
    mbedtls_x509_crt *chain = r->RTMP_TLS_ctx->cacert = calloc(1, sizeof(struct mbedtls_x509_crt));
    mbedtls_x509_crt_init(chain);

#if defined(_WIN32)
    HCERTSTORE hCertStore;
    PCCERT_CONTEXT pCertContext = NULL;

    if (!(hCertStore = CertOpenSystemStore((HCRYPTPROV)NULL, L"ROOT"))) {
        goto error;
    }

    while (pCertContext = CertEnumCertificatesInStore(hCertStore, pCertContext)) {
        mbedtls_x509_crt_parse_der(chain,
                                   (unsigned char *)pCertContext->pbCertEncoded,
                                   pCertContext->cbCertEncoded);
    }

    CertFreeCertificateContext(pCertContext);
    CertCloseStore(hCertStore, 0);
#elif defined(__APPLE__)
    SecKeychainRef keychain_ref;
    CFMutableDictionaryRef search_settings_ref;
    CFArrayRef result_ref;

    if (SecKeychainOpen("/System/Library/Keychains/SystemRootCertificates.keychain",
                        &keychain_ref)
        != errSecSuccess) {
      goto error;
    }

    search_settings_ref = CFDictionaryCreateMutable(NULL, 0, NULL, NULL);
    CFDictionarySetValue(search_settings_ref, kSecClass, kSecClassCertificate);
    CFDictionarySetValue(search_settings_ref, kSecMatchLimit, kSecMatchLimitAll);
    CFDictionarySetValue(search_settings_ref, kSecReturnRef, kCFBooleanTrue);
    CFDictionarySetValue(search_settings_ref, kSecMatchSearchList,
                         CFArrayCreate(NULL, (const void **)&keychain_ref, 1, NULL));

    if (SecItemCopyMatching(search_settings_ref, (CFTypeRef *)&result_ref)
        != errSecSuccess) {
      goto error;
    }

    for (CFIndex i = 0; i < CFArrayGetCount(result_ref); i++) {
      SecCertificateRef item_ref = (SecCertificateRef)
                                   CFArrayGetValueAtIndex(result_ref, i);
      CFDataRef data_ref;

      if ((data_ref = SecCertificateCopyData(item_ref))) {
        mbedtls_x509_crt_parse_der(chain,
                                   (unsigned char *)CFDataGetBytePtr(data_ref),
                                   CFDataGetLength(data_ref));
        CFRelease(data_ref);
      }
    }

    CFRelease(keychain_ref);
#elif defined(__linux__)
    if (mbedtls_x509_crt_parse_path(chain, "/etc/ssl/certs/") < 0) {
        RTMP_Log(RTMP_LOGERROR, "mbedtls_x509_crt_parse_path: Couldn't parse "
            "/etc/ssl/certs");
        goto error;
    }
#elif defined(__OpenBSD__)
    if (mbedtls_x509_crt_parse_file(chain, "/etc/ssl/cert.pem") < 0) {
        RTMP_Log(RTMP_LOGERROR, "mbedtls_x509_crt_parse_file: Couldn't parse "
            "/etc/ssl/cert.pem");
        goto error;
    }
#endif

    mbedtls_ssl_conf_ca_chain(&r->RTMP_TLS_ctx->conf, chain, NULL);
    return;

error:
    RTMP_Log(RTMP_LOGERROR, "RTMP_TLS_LoadCerts: Failed to load "
        "root certificate chains, RTMPS connections will likely "
        "fail");
    mbedtls_x509_crt_free(chain);
    free(chain);
    r->RTMP_TLS_ctx->cacert = NULL;
#else /* USE_MBEDTLS */
	UNUSED_PARAMETER(r);
#endif /* USE_MBEDTLS */
}

void
RTMP_TLS_Init(RTMP *r)
{
#ifdef CRYPTO
#if defined(USE_MBEDTLS)
    const char * pers = "RTMP_TLS";
    r->RTMP_TLS_ctx = calloc(1,sizeof(struct tls_ctx));

    mbedtls_ssl_config_init(&r->RTMP_TLS_ctx->conf);
    mbedtls_ctr_drbg_init(&r->RTMP_TLS_ctx->ctr_drbg);
    mbedtls_entropy_init(&r->RTMP_TLS_ctx->entropy);

    mbedtls_ctr_drbg_seed(&r->RTMP_TLS_ctx->ctr_drbg,
                          mbedtls_entropy_func,
                          &r->RTMP_TLS_ctx->entropy,
                          (const unsigned char *)pers,
                          strlen(pers));

    RTMP_TLS_LoadCerts(r);
#elif defined(USE_POLARSSL)
    /* Do this regardless of NO_SSL, we use havege for rtmpe too */
    RTMP_TLS_ctx = calloc(1,sizeof(struct tls_ctx));
    havege_init(&RTMP_TLS_ctx->hs);
#elif defined(USE_GNUTLS) && !defined(NO_SSL)
    /* Technically we need to initialize libgcrypt ourselves if
     * we're not going to call gnutls_global_init(). Ignoring this
     * for now.
     */
    gnutls_global_init();
    RTMP_TLS_ctx = malloc(sizeof(struct tls_ctx));
    gnutls_certificate_allocate_credentials(&RTMP_TLS_ctx->cred);
    gnutls_priority_init(&RTMP_TLS_ctx->prios, "NORMAL", NULL);
    gnutls_certificate_set_x509_trust_file(RTMP_TLS_ctx->cred,
                                           "ca.pem", GNUTLS_X509_FMT_PEM);
#elif !defined(NO_SSL) /* USE_OPENSSL */
    /* libcrypto doesn't need anything special */
    SSL_load_error_strings();
    SSL_library_init();
    OpenSSL_add_all_digests();
    RTMP_TLS_ctx = SSL_CTX_new(SSLv23_method());
    SSL_CTX_set_options(RTMP_TLS_ctx, SSL_OP_ALL);
    SSL_CTX_set_default_verify_paths(RTMP_TLS_ctx);
#endif
#else
	UNUSED_PARAMETER(r);
#endif
}

void
RTMP_TLS_Free(RTMP *r) {
#ifdef USE_MBEDTLS

    if (!r->RTMP_TLS_ctx)
        return;
    mbedtls_ssl_config_free(&r->RTMP_TLS_ctx->conf);
    mbedtls_ctr_drbg_free(&r->RTMP_TLS_ctx->ctr_drbg);
    mbedtls_entropy_free(&r->RTMP_TLS_ctx->entropy);

    if (r->RTMP_TLS_ctx->cacert) {
        mbedtls_x509_crt_free(r->RTMP_TLS_ctx->cacert);
        free(r->RTMP_TLS_ctx->cacert);
        r->RTMP_TLS_ctx->cacert = NULL;
    }

    // NO mbedtls_net_free() BECAUSE WE SET IT UP BY HAND!
    free(r->RTMP_TLS_ctx);
    r->RTMP_TLS_ctx = NULL;
#else
	UNUSED_PARAMETER(r);
#endif
}

RTMP *
RTMP_Alloc()
{
    return calloc(1, sizeof(RTMP));
}

void
RTMP_Free(RTMP *r)
{
#if defined(CRYPTO) && defined(USE_MBEDTLS)
    RTMP_TLS_Free(r);
#endif
    free(r);
}

void
RTMP_Init(RTMP *r)
{
    memset(r, 0, sizeof(RTMP));
    r->m_sb.sb_socket = -1;
    RTMP_Reset(r);

#ifdef CRYPTO
    RTMP_TLS_Init(r);
#endif

}

void
RTMP_Reset(RTMP *r)
{
    r->m_inChunkSize = RTMP_DEFAULT_CHUNKSIZE;
    r->m_outChunkSize = RTMP_DEFAULT_CHUNKSIZE;
    r->m_bSendChunkSizeInfo = 1;
    r->m_nBufferMS = 30000;
    r->m_nClientBW = 2500000;
    r->m_nClientBW2 = 2;
    r->m_nServerBW = 2500000;
    r->m_fAudioCodecs = 3191.0;
    r->m_fVideoCodecs = 252.0;
    r->Link.curStreamIdx = 0;
    r->Link.nStreams = 0;
    r->Link.receiveTimeout = 30;
    r->Link.sendTimeout = 6;
    r->Link.swfAge = 30;
}

void
RTMP_EnableWrite(RTMP *r)
{
    r->Link.protocol |= RTMP_FEATURE_WRITE;
}

double
RTMP_GetDuration(RTMP *r)
{
    return r->m_fDuration;
}

int
RTMP_IsConnected(RTMP *r)
{
    return r->m_sb.sb_socket != INVALID_SOCKET;
}

SOCKET
RTMP_Socket(RTMP *r)
{
    return r->m_sb.sb_socket;
}

int
RTMP_IsTimedout(RTMP *r)
{
    return r->m_sb.sb_timedout;
}

void
RTMP_SetBufferMS(RTMP *r, int size)
{
    r->m_nBufferMS = size;
}

void
RTMP_UpdateBufferMS(RTMP *r)
{
    RTMP_SendCtrl(r, 3, r->m_stream_id, r->m_nBufferMS);
}

#undef OSS
#ifdef _WIN32
#define OSS	"WIN"
#elif defined(__sun__)
#define OSS	"SOL"
#elif defined(__APPLE__)
#define OSS	"MAC"
#elif defined(__linux__)
#define OSS	"LNX"
#else
#define OSS	"GNU"
#endif
#define DEF_VERSTR	OSS " 10,0,32,18"
static const char DEFAULT_FLASH_VER[] = DEF_VERSTR;
const AVal RTMP_DefaultFlashVer =
{ (char *)DEFAULT_FLASH_VER, sizeof(DEFAULT_FLASH_VER) - 1 };

static void
SocksSetup(RTMP *r, AVal *sockshost)
{
    if (sockshost->av_len)
    {
        const char *socksport = strchr(sockshost->av_val, ':');
        char *hostname = strdup(sockshost->av_val);

        if (socksport)
            hostname[socksport - sockshost->av_val] = '\0';
        r->Link.sockshost.av_val = hostname;
        r->Link.sockshost.av_len = (int)strlen(hostname);

        r->Link.socksport = socksport ? atoi(socksport + 1) : 1080;
        RTMP_Log(RTMP_LOGDEBUG, "Connecting via SOCKS proxy: %s:%d", r->Link.sockshost.av_val,
                 r->Link.socksport);
    }
    else
    {
        r->Link.sockshost.av_val = NULL;
        r->Link.sockshost.av_len = 0;
        r->Link.socksport = 0;
    }
}

static int
parseAMF(AMFObject *obj, AVal *av, int *depth)
{
    AMFObjectProperty prop = {{0,0}};
    int i;
    char *p, *arg = av->av_val;

    if (arg[1] == ':')
    {
        p = (char *)arg+2;
        switch(arg[0])
        {
        case 'B':
            prop.p_type = AMF_BOOLEAN;
            prop.p_vu.p_number = atoi(p);
            break;
        case 'S':
            prop.p_type = AMF_STRING;
            prop.p_vu.p_aval.av_val = p;
            prop.p_vu.p_aval.av_len = av->av_len - (p-arg);
            break;
        case 'N':
            prop.p_type = AMF_NUMBER;
            prop.p_vu.p_number = strtod(p, NULL);
            break;
        case 'Z':
            prop.p_type = AMF_NULL;
            break;
        case 'O':
            i = atoi(p);
            if (i)
            {
                prop.p_type = AMF_OBJECT;
            }
            else
            {
                (*depth)--;
                return 0;
            }
            break;
        default:
            return -1;
        }
    }
    else if (arg[2] == ':' && arg[0] == 'N')
    {
        p = strchr(arg+3, ':');
        if (!p || !*depth)
            return -1;
        prop.p_name.av_val = (char *)arg+3;
        prop.p_name.av_len = p - (arg+3);

        p++;
        switch(arg[1])
        {
        case 'B':
            prop.p_type = AMF_BOOLEAN;
            prop.p_vu.p_number = atoi(p);
            break;
        case 'S':
            prop.p_type = AMF_STRING;
            prop.p_vu.p_aval.av_val = p;
            prop.p_vu.p_aval.av_len = av->av_len - (p-arg);
            break;
        case 'N':
            prop.p_type = AMF_NUMBER;
            prop.p_vu.p_number = strtod(p, NULL);
            break;
        case 'O':
            prop.p_type = AMF_OBJECT;
            break;
        default:
            return -1;
        }
    }
    else
        return -1;

    if (*depth)
    {
        AMFObject *o2;
        for (i=0; i<*depth; i++)
        {
            o2 = &obj->o_props[obj->o_num-1].p_vu.p_object;
            obj = o2;
        }
    }
    AMF_AddProp(obj, &prop);
    if (prop.p_type == AMF_OBJECT)
        (*depth)++;
    return 0;
}

int RTMP_SetupURL(RTMP *r, char *url)
{
    int ret, len;
    unsigned int port = 0;

    len = (int)strlen(url);
    ret = RTMP_ParseURL(url, &r->Link.protocol, &r->Link.hostname,
        &port, &r->Link.app);
    if (!ret)
        return ret;
    r->Link.port = port;

    if (!r->Link.tcUrl.av_len)
    {
        r->Link.tcUrl.av_val = url;
        if (r->Link.app.av_len)
        {
            if (r->Link.app.av_val < url + len)
            {
                /* if app is part of original url, just use it */
                r->Link.tcUrl.av_len = r->Link.app.av_len + (r->Link.app.av_val - url);
            }
            else
            {
                len = r->Link.hostname.av_len + r->Link.app.av_len +
                    sizeof("rtmpte://:65535/");
                r->Link.tcUrl.av_val = malloc(len);
                r->Link.tcUrl.av_len = snprintf(r->Link.tcUrl.av_val, len,
                    "%s://%.*s:%d/%.*s",
                    RTMPProtocolStringsLower[r->Link.protocol],
                    r->Link.hostname.av_len, r->Link.hostname.av_val,
                    r->Link.port,
                    r->Link.app.av_len, r->Link.app.av_val);
                r->Link.lFlags |= RTMP_LF_FTCU;
            }
        }
        else
        {
            r->Link.tcUrl.av_len = (int)strlen(url);
        }
    }

#ifdef CRYPTO
    if ((r->Link.lFlags & RTMP_LF_SWFV) && r->Link.swfUrl.av_len)
#ifdef USE_HASHSWF
        RTMP_HashSWF(r->Link.swfUrl.av_val, &r->Link.SWFSize,
        (unsigned char *)r->Link.SWFHash, r->Link.swfAge);
#else
        return FALSE;
#endif
#endif

    SocksSetup(r, &r->Link.sockshost);

    if (r->Link.port == 0)
    {
        if (r->Link.protocol & RTMP_FEATURE_SSL)
            r->Link.port = 443;
        else if (r->Link.protocol & RTMP_FEATURE_HTTP)
            r->Link.port = 80;
        else
            r->Link.port = 1935;
    }
    return TRUE;
}

int RTMP_AddStream(RTMP *r, const char *playpath)
{
    int idx = -1;
    AVal pp = { (char*)playpath, playpath?(int)strlen(playpath):0 };

    RTMP_ParsePlaypath(&pp, &r->Link.streams[r->Link.nStreams].playpath);
    r->Link.streams[r->Link.nStreams].id = -1;

    idx = r->Link.nStreams;
    r->Link.nStreams++;

    return idx;
}

static int
add_addr_info(struct sockaddr_storage *service, socklen_t *addrlen, AVal *host, int port, socklen_t addrlen_hint, int *socket_error)
{
    char *hostname;
    int ret = TRUE;
    if (host->av_val[host->av_len] || host->av_val[0] == '[')
    {
        int v6 = host->av_val[0] == '[';
        hostname = malloc(host->av_len+1 - v6 * 2);
        memcpy(hostname, host->av_val + v6, host->av_len - v6 * 2);
        hostname[host->av_len - v6 * 2] = '\0';
    }
    else
    {
        hostname = host->av_val;
    }

    struct addrinfo hints;
    struct addrinfo *result = NULL;
    struct addrinfo *ptr = NULL;

    memset(&hints, 0, sizeof(hints));

    hints.ai_family = AF_UNSPEC;
    hints.ai_socktype = SOCK_STREAM;
    hints.ai_protocol = IPPROTO_TCP;

    service->ss_family = AF_UNSPEC;
    *addrlen = 0;

    char portStr[8];

    sprintf(portStr, "%d", port);

    int err = getaddrinfo(hostname, portStr, &hints, &result);

    if (err)
    {
#ifndef _WIN32
#define gai_strerrorA gai_strerror
#endif
        RTMP_Log(RTMP_LOGERROR, "Could not resolve %s: %s (%d)", hostname, gai_strerrorA(GetSockError()), GetSockError());
        *socket_error = GetSockError();
        ret = FALSE;
        goto finish;
    }

    // prefer ipv4 results, since lots of ISPs have broken ipv6 connectivity
    for (ptr = result; ptr != NULL; ptr = ptr->ai_next)
    {
        if (ptr->ai_family == AF_INET && (!addrlen_hint || ptr->ai_addrlen == addrlen_hint))
        {
            memcpy(service, ptr->ai_addr, ptr->ai_addrlen);
            *addrlen = (socklen_t)ptr->ai_addrlen;
            break;
        }
    }

    if (!*addrlen)
    {
        for (ptr = result; ptr != NULL; ptr = ptr->ai_next)
        {
            if (ptr->ai_family == AF_INET6 && (!addrlen_hint || ptr->ai_addrlen == addrlen_hint))
            {
                memcpy(service, ptr->ai_addr, ptr->ai_addrlen);
                *addrlen = (socklen_t)ptr->ai_addrlen;
                break;
            }
        }
    }

    freeaddrinfo(result);

    if (service->ss_family == AF_UNSPEC || *addrlen == 0)
    {
        // since we're handling multiple addresses internally, fake the correct error response
#ifdef _WIN32
        *socket_error = WSANO_DATA;
#elif __FreeBSD__
        *socket_error = ENOATTR;
#elif defined(ENODATA)
        *socket_error = ENODATA;
#else
        *socket_error = EAFNOSUPPORT;
#endif

        RTMP_Log(RTMP_LOGERROR, "Could not resolve server '%s': no valid address found", hostname);
        ret = FALSE;
        goto finish;
    }

finish:
    if (hostname != host->av_val)
        free(hostname);
    return ret;
}

#ifdef _WIN32
#define E_TIMEDOUT     WSAETIMEDOUT
#define E_CONNREFUSED  WSAECONNREFUSED
#define E_ACCES        WSAEACCES
#else
#define E_TIMEDOUT     ETIMEDOUT
#define E_CONNREFUSED  ECONNREFUSED
#define E_ACCES        EACCES
#endif

int
RTMP_Connect0(RTMP *r, struct sockaddr * service, socklen_t addrlen)
{
    int on = 1;
    r->m_sb.sb_timedout = FALSE;
    r->m_pausing = 0;
    r->m_fDuration = 0.0;

    //best to be explicit, we need overlapped socket
#ifdef _WIN32
    r->m_sb.sb_socket = WSASocket(service->sa_family, SOCK_STREAM, IPPROTO_TCP, NULL, 0, WSA_FLAG_OVERLAPPED);
#else
    r->m_sb.sb_socket = socket(service->sa_family, SOCK_STREAM, IPPROTO_TCP);
#endif

    if (r->m_sb.sb_socket != INVALID_SOCKET)
    {
#ifndef _WIN32
#ifdef SO_NOSIGPIPE
        setsockopt(r->m_sb.sb_socket, SOL_SOCKET, SO_NOSIGPIPE, &(int){ 1 }, sizeof(int));
#endif
#endif
        if(r->m_bindIP.addrLen)
        {
            if (bind(r->m_sb.sb_socket, (const struct sockaddr *)&r->m_bindIP.addr, r->m_bindIP.addrLen) < 0)
            {
                int err = GetSockError();
                RTMP_Log(RTMP_LOGERROR, "%s, failed to bind socket: %s (%d)",
                         __FUNCTION__, socketerror(err), err);
                r->last_error_code = err;
                RTMP_Close(r);
                return FALSE;
            }
        }

        uint64_t connect_start = os_gettime_ns();

        if (connect(r->m_sb.sb_socket, service, addrlen) < 0)
        {
            int err = GetSockError();
            if (err == E_CONNREFUSED)
                RTMP_Log(RTMP_LOGERROR, "%s is offline. Try a different server (ECONNREFUSED).", r->Link.hostname.av_val);
            else if (err == E_ACCES)
                RTMP_Log(RTMP_LOGERROR, "The connection is being blocked by a firewall or other security software (EACCES).");
            else if (err == E_TIMEDOUT)
                RTMP_Log(RTMP_LOGERROR, "The connection timed out. Try a different server, or check that the connection is not being blocked by a firewall or other security software (ETIMEDOUT).");
            else
                RTMP_Log(RTMP_LOGERROR, "%s, failed to connect socket: %s (%d)",
                     __FUNCTION__, socketerror(err), err);
            r->last_error_code = err;
            RTMP_Close(r);
            return FALSE;
        }

        r->connect_time_ms = (int)((os_gettime_ns() - connect_start) / 1000000);

        if (r->Link.socksport)
        {
            RTMP_Log(RTMP_LOGDEBUG, "%s ... SOCKS negotiation", __FUNCTION__);
            if (!SocksNegotiate(r))
            {
                RTMP_Log(RTMP_LOGERROR, "%s, SOCKS negotiation failed.", __FUNCTION__);
                RTMP_Close(r);
                return FALSE;
            }
        }
    }
    else
    {
        RTMP_Log(RTMP_LOGERROR, "%s, failed to create socket. Error: %d", __FUNCTION__,
                 GetSockError());
        return FALSE;
    }

    /* set timeout */
    {
        SET_RCVTIMEO(tvr, r->Link.receiveTimeout);
        if (setsockopt
                (r->m_sb.sb_socket, SOL_SOCKET, SO_RCVTIMEO, (char *)&tvr, sizeof(tvr)))
        {
            RTMP_Log(RTMP_LOGERROR, "%s, Setting socket receive timeout to %ds failed!",
                     __FUNCTION__, r->Link.receiveTimeout);
        }

        SET_RCVTIMEO(tvs, r->Link.sendTimeout);
        if (setsockopt
                (r->m_sb.sb_socket, SOL_SOCKET, SO_SNDTIMEO, (char *)&tvs, sizeof(tvs)))
        {
                RTMP_Log(RTMP_LOGERROR, "%s, Setting socket send timeout to %ds failed!",
                     __FUNCTION__, r->Link.sendTimeout);
        }
    }

    if(!r->m_bUseNagle)
        setsockopt(r->m_sb.sb_socket, IPPROTO_TCP, TCP_NODELAY, (char *) &on, sizeof(on));

    return TRUE;
}

int
RTMP_Connect1(RTMP *r, RTMPPacket *cp)
{
    if (r->Link.protocol & RTMP_FEATURE_SSL)
    {
#if defined(CRYPTO) && !defined(NO_SSL)
        TLS_client(r->RTMP_TLS_ctx, r->m_sb.sb_ssl);

#if defined(USE_MBEDTLS)
        mbedtls_net_context *server_fd = &r->RTMP_TLS_ctx->net;
#if MBEDTLS_VERSION_NUMBER == 0x03000000
        server_fd->MBEDTLS_PRIVATE(fd) = r->m_sb.sb_socket;
#else
        server_fd->fd = r->m_sb.sb_socket;
#endif
        TLS_setfd(r->m_sb.sb_ssl, server_fd);

        // make sure we verify the certificate hostname
        char hostname[MBEDTLS_SSL_MAX_HOST_NAME_LEN + 1];

        if (r->Link.hostname.av_len >= MBEDTLS_SSL_MAX_HOST_NAME_LEN)
            return FALSE;

        memcpy(hostname, r->Link.hostname.av_val, r->Link.hostname.av_len);
        hostname[r->Link.hostname.av_len] = 0;

        if (mbedtls_ssl_set_hostname(r->m_sb.sb_ssl, hostname))
            return FALSE;
#else
        TLS_setfd(r->m_sb.sb_ssl, r->m_sb.sb_socket);
#endif

        int connect_return = TLS_connect(r->m_sb.sb_ssl);
        if (connect_return < 0)
        {
#if defined(USE_MBEDTLS)
            r->last_error_code = connect_return;
            if (connect_return == MBEDTLS_ERR_X509_CERT_VERIFY_FAILED)
            {
                // show a more detailed error in the log if possible
                int verify_result = mbedtls_ssl_get_verify_result(r->m_sb.sb_ssl);
                if (verify_result)
                {
                    char err[256], *e;
                    if (mbedtls_x509_crt_verify_info(err, sizeof(err), "", verify_result) > 0)
                    {
                        e = strchr(err, '\n');
                        if (e)
                            *e = '\0';
                    }
                    else
                    {
                        strcpy(err, "unknown error");
                    }
                    RTMP_Log(RTMP_LOGERROR, "%s, Cert verify failed: %d (%s)", __FUNCTION__, verify_result, err);
                    RTMP_Close(r);
                    return FALSE;
                }
            }
#endif
            // output the error in a format that matches mbedTLS
            connect_return = abs(connect_return);
            RTMP_Log(RTMP_LOGERROR, "%s, TLS_Connect failed: -0x%x", __FUNCTION__, connect_return);
            RTMP_Close(r);
            return FALSE;
        }
#else
        RTMP_Log(RTMP_LOGERROR, "%s, no SSL/TLS support", __FUNCTION__);
        RTMP_Close(r);
        return FALSE;
#endif
    }
    if (r->Link.protocol & RTMP_FEATURE_HTTP)
    {
        r->m_msgCounter = 1;
        r->m_clientID.av_val = NULL;
        r->m_clientID.av_len = 0;
        HTTP_Post(r, RTMPT_OPEN, "", 1);
        if (HTTP_read(r, 1) != 0)
        {
            r->m_msgCounter = 0;
            RTMP_Log(RTMP_LOGDEBUG, "%s, Could not connect for handshake", __FUNCTION__);
            RTMP_Close(r);
            return 0;
        }
        r->m_msgCounter = 0;
    }
    RTMP_Log(RTMP_LOGDEBUG, "%s, ... connected, handshaking", __FUNCTION__);
    if (!HandShake(r, TRUE))
    {
        RTMP_Log(RTMP_LOGERROR, "%s, handshake failed.", __FUNCTION__);
        RTMP_Close(r);
        return FALSE;
    }
    RTMP_Log(RTMP_LOGDEBUG, "%s, handshaked", __FUNCTION__);

    if (!SendConnectPacket(r, cp))
    {
        RTMP_Log(RTMP_LOGERROR, "%s, RTMP connect failed.", __FUNCTION__);
        RTMP_Close(r);
        return FALSE;
    }
    return TRUE;
}

int
RTMP_Connect(RTMP *r, RTMPPacket *cp)
{
#ifdef _WIN32
    HOSTENT *h;
#endif
    struct sockaddr_storage service;
    socklen_t addrlen = 0;
    socklen_t addrlen_hint = 0;
    int socket_error = 0;

    if (!r->Link.hostname.av_len)
        return FALSE;

#ifdef _WIN32
    //COMODO security software sandbox blocks all DNS by returning "host not found"
    h = gethostbyname("localhost");
    if (!h && GetLastError() == WSAHOST_NOT_FOUND)
    {
        r->last_error_code = WSAHOST_NOT_FOUND;
        RTMP_Log(RTMP_LOGERROR, "RTMP_Connect: Connection test failed. This error is likely caused by Comodo Internet Security running OBS in sandbox mode. Please add OBS to the Comodo automatic sandbox exclusion list, restart OBS and try again (11001).");
        return FALSE;
    }
#endif

    memset(&service, 0, sizeof(service));

    if (r->m_bindIP.addrLen)
        addrlen_hint = r->m_bindIP.addrLen;

    if (r->Link.socksport)
    {
        /* Connect via SOCKS */
        if (!add_addr_info(&service, &addrlen, &r->Link.sockshost, r->Link.socksport, addrlen_hint, &socket_error))
        {
            r->last_error_code = socket_error;
            return FALSE;
        }
    }
    else
    {
        /* Connect directly */
        if (!add_addr_info(&service, &addrlen, &r->Link.hostname, r->Link.port, addrlen_hint, &socket_error))
        {
            r->last_error_code = socket_error;
            return FALSE;
        }
    }

    if (!RTMP_Connect0(r, (struct sockaddr *)&service, addrlen))
        return FALSE;

    r->m_bSendCounter = TRUE;

    return RTMP_Connect1(r, cp);
}

static int
SocksNegotiate(RTMP *r)
{
    unsigned long addr;
    struct sockaddr_storage service;
    socklen_t addrlen = 0;
    int socket_error = 0;
    memset(&service, 0, sizeof(service));

    add_addr_info(&service, &addrlen, &r->Link.hostname, r->Link.port, 0, &socket_error);

    // not doing IPv6 socks
    if (service.ss_family == AF_INET6)
        return FALSE;

    addr = htonl((*(struct sockaddr_in *)&service).sin_addr.s_addr);

    {
        char packet[] =
        {
            4, 1,			/* SOCKS 4, connect */
            (r->Link.port >> 8) & 0xFF,
            (r->Link.port) & 0xFF,
            (char)(addr >> 24) & 0xFF, (char)(addr >> 16) & 0xFF,
            (char)(addr >> 8) & 0xFF, (char)addr & 0xFF,
            0
        };				/* NULL terminate */

        WriteN(r, packet, sizeof packet);

        if (ReadN(r, packet, 8) != 8)
            return FALSE;

        if (packet[0] == 0 && packet[1] == 90)
        {
            return TRUE;
        }
        else
        {
            RTMP_Log(RTMP_LOGERROR, "%s, SOCKS returned error code %d", __FUNCTION__, packet[1]);
            return FALSE;
        }
    }
}

int
RTMP_ConnectStream(RTMP *r, int seekTime)
{
    RTMPPacket packet = { 0 };

    /* seekTime was already set by SetupStream / SetupURL.
     * This is only needed by ReconnectStream.
     */
    if (seekTime > 0)
        r->Link.seekTime = seekTime;

    r->m_mediaChannel = 0;

    while (!r->m_bPlaying && RTMP_IsConnected(r) && RTMP_ReadPacket(r, &packet))
    {
        if (RTMPPacket_IsReady(&packet))
        {
            if (!packet.m_nBodySize)
                continue;
            if ((packet.m_packetType == RTMP_PACKET_TYPE_AUDIO) ||
                    (packet.m_packetType == RTMP_PACKET_TYPE_VIDEO) ||
                    (packet.m_packetType == RTMP_PACKET_TYPE_INFO))
            {
                RTMP_Log(RTMP_LOGWARNING, "Received FLV packet before play()! Ignoring.");
                RTMPPacket_Free(&packet);
                continue;
            }

            RTMP_ClientPacket(r, &packet);
            RTMPPacket_Free(&packet);
        }
    }

    return r->m_bPlaying;
}

int
RTMP_ReconnectStream(RTMP *r, int seekTime, int streamIdx)
{
    RTMP_DeleteStream(r, streamIdx);

    RTMP_SendCreateStream(r);

    return RTMP_ConnectStream(r, seekTime);
}

int
RTMP_ToggleStream(RTMP *r)
{
    int res;

    if (!r->m_pausing)
    {
        if (RTMP_IsTimedout(r) && r->m_read.status == RTMP_READ_EOF)
            r->m_read.status = 0;

        res = RTMP_SendPause(r, TRUE, r->m_pauseStamp);
        if (!res)
            return res;

        r->m_pausing = 1;
        sleep(1);
    }
    res = RTMP_SendPause(r, FALSE, r->m_pauseStamp);
    r->m_pausing = 3;
    return res;
}

void
RTMP_DeleteStream(RTMP *r, int streamIdx)
{
    if (r->m_stream_id < 0)
        return;

    r->m_bPlaying = FALSE;

    if ((r->Link.protocol & RTMP_FEATURE_WRITE))
        SendFCUnpublish(r, streamIdx);

    SendDeleteStream(r, r->m_stream_id);
    r->m_stream_id = -1;
}

int
RTMP_GetNextMediaPacket(RTMP *r, RTMPPacket *packet)
{
    int bHasMediaPacket = 0;

    while (!bHasMediaPacket && RTMP_IsConnected(r)
            && RTMP_ReadPacket(r, packet))
    {
        if (!RTMPPacket_IsReady(packet) || !packet->m_nBodySize)
        {
            continue;
        }

        bHasMediaPacket = RTMP_ClientPacket(r, packet);

        if (!bHasMediaPacket)
        {
            RTMPPacket_Free(packet);
        }
        else if (r->m_pausing == 3)
        {
            if (packet->m_nTimeStamp <= r->m_mediaStamp)
            {
                bHasMediaPacket = 0;
#ifdef _DEBUG
                RTMP_Log(RTMP_LOGDEBUG,
                         "Skipped type: %02X, size: %d, TS: %d ms, abs TS: %d, pause: %d ms",
                         packet->m_packetType, packet->m_nBodySize,
                         packet->m_nTimeStamp, packet->m_hasAbsTimestamp,
                         r->m_mediaStamp);
#endif
                RTMPPacket_Free(packet);
                continue;
            }
            r->m_pausing = 0;
        }
    }

    if (bHasMediaPacket)
        r->m_bPlaying = TRUE;
    else if (r->m_sb.sb_timedout && !r->m_pausing)
        r->m_pauseStamp = r->m_mediaChannel < r->m_channelsAllocatedIn ?
                          r->m_channelTimestamp[r->m_mediaChannel] : 0;

    return bHasMediaPacket;
}

int
RTMP_ClientPacket(RTMP *r, RTMPPacket *packet)
{
    int bHasMediaPacket = 0;
    switch (packet->m_packetType)
    {
    case RTMP_PACKET_TYPE_CHUNK_SIZE:
        /* chunk size */
        HandleChangeChunkSize(r, packet);
        break;

    case RTMP_PACKET_TYPE_BYTES_READ_REPORT:
        /* bytes read report */
        RTMP_Log(RTMP_LOGDEBUG, "%s, received: bytes read report", __FUNCTION__);
        break;

    case RTMP_PACKET_TYPE_CONTROL:
        /* ctrl */
        HandleCtrl(r, packet);
        break;

    case RTMP_PACKET_TYPE_SERVER_BW:
        /* server bw */
        HandleServerBW(r, packet);
        break;

    case RTMP_PACKET_TYPE_CLIENT_BW:
        /* client bw */
        HandleClientBW(r, packet);
        break;

    case RTMP_PACKET_TYPE_AUDIO:
        /* audio data */
        /*RTMP_Log(RTMP_LOGDEBUG, "%s, received: audio %lu bytes", __FUNCTION__, packet.m_nBodySize); */
        HandleAudio(r, packet);
        bHasMediaPacket = 1;
        if (!r->m_mediaChannel)
            r->m_mediaChannel = packet->m_nChannel;
        if (!r->m_pausing)
            r->m_mediaStamp = packet->m_nTimeStamp;
        break;

    case RTMP_PACKET_TYPE_VIDEO:
        /* video data */
        /*RTMP_Log(RTMP_LOGDEBUG, "%s, received: video %lu bytes", __FUNCTION__, packet.m_nBodySize); */
        HandleVideo(r, packet);
        bHasMediaPacket = 1;
        if (!r->m_mediaChannel)
            r->m_mediaChannel = packet->m_nChannel;
        if (!r->m_pausing)
            r->m_mediaStamp = packet->m_nTimeStamp;
        break;

    case RTMP_PACKET_TYPE_FLEX_STREAM_SEND:
        /* flex stream send */
        RTMP_Log(RTMP_LOGDEBUG,
                 "%s, flex stream send, size %u bytes, not supported, ignoring",
                 __FUNCTION__, packet->m_nBodySize);
        break;

    case RTMP_PACKET_TYPE_FLEX_SHARED_OBJECT:
        /* flex shared object */
        RTMP_Log(RTMP_LOGDEBUG,
                 "%s, flex shared object, size %u bytes, not supported, ignoring",
                 __FUNCTION__, packet->m_nBodySize);
        break;

    case RTMP_PACKET_TYPE_FLEX_MESSAGE:
        /* flex message */
    {
        RTMP_Log(RTMP_LOGDEBUG,
                 "%s, flex message, size %u bytes, not fully supported",
                 __FUNCTION__, packet->m_nBodySize);
        /*RTMP_LogHex(packet.m_body, packet.m_nBodySize); */

        /* some DEBUG code */
#if 0
        RTMP_LIB_AMFObject obj;
        int nRes = obj.Decode(packet.m_body+1, packet.m_nBodySize-1);
        if(nRes < 0)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, error decoding AMF3 packet", __FUNCTION__);
            /*return; */
        }

        obj.Dump();
#endif

        if (HandleInvoke(r, packet->m_body + 1, packet->m_nBodySize - 1) == 1)
            bHasMediaPacket = 2;
        break;
    }
    case RTMP_PACKET_TYPE_INFO:
        /* metadata (notify) */
        RTMP_Log(RTMP_LOGDEBUG, "%s, received: notify %u bytes", __FUNCTION__,
                 packet->m_nBodySize);
        if (HandleMetadata(r, packet->m_body, packet->m_nBodySize))
            bHasMediaPacket = 1;
        break;

    case RTMP_PACKET_TYPE_SHARED_OBJECT:
        RTMP_Log(RTMP_LOGDEBUG, "%s, shared object, not supported, ignoring",
                 __FUNCTION__);
        break;

    case RTMP_PACKET_TYPE_INVOKE:
        /* invoke */
        RTMP_Log(RTMP_LOGDEBUG, "%s, received: invoke %u bytes", __FUNCTION__,
                 packet->m_nBodySize);
        /*RTMP_LogHex(packet.m_body, packet.m_nBodySize); */

        if (HandleInvoke(r, packet->m_body, packet->m_nBodySize) == 1)
            bHasMediaPacket = 2;
        break;

    case RTMP_PACKET_TYPE_FLASH_VIDEO:
    {
        /* go through FLV packets and handle metadata packets */
        unsigned int pos = 0;
        uint32_t nTimeStamp = packet->m_nTimeStamp;

        while (pos + 11 < packet->m_nBodySize)
        {
            uint32_t dataSize = AMF_DecodeInt24(packet->m_body + pos + 1);	/* size without header (11) and prevTagSize (4) */

            if (pos + 11 + dataSize + 4 > packet->m_nBodySize)
            {
                RTMP_Log(RTMP_LOGWARNING, "Stream corrupt?!");
                break;
            }
            if (packet->m_body[pos] == 0x12)
            {
                HandleMetadata(r, packet->m_body + pos + 11, dataSize);
            }
            else if (packet->m_body[pos] == 8 || packet->m_body[pos] == 9)
            {
                nTimeStamp = AMF_DecodeInt24(packet->m_body + pos + 4);
                nTimeStamp |= (packet->m_body[pos + 7] << 24);
            }
            pos += (11 + dataSize + 4);
        }
        if (!r->m_pausing)
            r->m_mediaStamp = nTimeStamp;

        /* FLV tag(s) */
        /*RTMP_Log(RTMP_LOGDEBUG, "%s, received: FLV tag(s) %lu bytes", __FUNCTION__, packet.m_nBodySize); */
        bHasMediaPacket = 1;
        break;
    }
    default:
        RTMP_Log(RTMP_LOGDEBUG, "%s, unknown packet type received: 0x%02x", __FUNCTION__,
                 packet->m_packetType);
#ifdef _DEBUG
        RTMP_LogHex(RTMP_LOGDEBUG, (const uint8_t*)packet->m_body, packet->m_nBodySize);
#endif
    }

    return bHasMediaPacket;
}

#if defined(RTMP_NETSTACK_DUMP)
extern FILE *netstackdump;
extern FILE *netstackdump_read;
#endif

static int
ReadN(RTMP *r, char *buffer, int n)
{
    int nOriginalSize = n;
    int avail;
    char *ptr;

    r->m_sb.sb_timedout = FALSE;

#ifdef _DEBUG
    memset(buffer, 0, n);
#endif

    ptr = buffer;
    while (n > 0)
    {
        int nBytes = 0, nRead;
        if (r->Link.protocol & RTMP_FEATURE_HTTP)
        {
            int refill = 0;
            while (!r->m_resplen)
            {
                int ret;
                if (r->m_sb.sb_size < 13 || refill)
                {
                    if (!r->m_unackd)
                        HTTP_Post(r, RTMPT_IDLE, "", 1);
                    if (RTMPSockBuf_Fill(&r->m_sb) < 1)
                    {
                        if (!r->m_sb.sb_timedout)
                            RTMP_Close(r);
                        return 0;
                    }
                }
                if ((ret = HTTP_read(r, 0)) == -1)
                {
                    RTMP_Log(RTMP_LOGDEBUG, "%s, No valid HTTP response found", __FUNCTION__);
                    RTMP_Close(r);
                    return 0;
                }
                else if (ret == -2)
                {
                    refill = 1;
                }
                else
                {
                    refill = 0;
                }
            }
            if (r->m_resplen && !r->m_sb.sb_size)
                RTMPSockBuf_Fill(&r->m_sb);
            avail = r->m_sb.sb_size;
            if (avail > r->m_resplen)
                avail = r->m_resplen;
        }
        else
        {
            avail = r->m_sb.sb_size;
            if (avail == 0)
            {
                if (RTMPSockBuf_Fill(&r->m_sb) < 1)
                {
                    if (!r->m_sb.sb_timedout)
                        RTMP_Close(r);
                    return 0;
                }
                avail = r->m_sb.sb_size;
            }
        }
        nRead = ((n < avail) ? n : avail);
        if (nRead > 0)
        {
            memcpy(ptr, r->m_sb.sb_start, nRead);
            r->m_sb.sb_start += nRead;
            r->m_sb.sb_size -= nRead;
            nBytes = nRead;
            r->m_nBytesIn += nRead;
            if (r->m_bSendCounter
                    && r->m_nBytesIn > ( r->m_nBytesInSent + r->m_nClientBW / 10))
                if (!SendBytesReceived(r))
                    return FALSE;
        }
        /*RTMP_Log(RTMP_LOGDEBUG, "%s: %d bytes\n", __FUNCTION__, nBytes); */
#if defined(RTMP_NETSTACK_DUMP)
        fwrite(ptr, 1, nBytes, netstackdump_read);
#endif

        if (nBytes == 0)
        {
            RTMP_Log(RTMP_LOGDEBUG, "%s, RTMP socket closed by peer", __FUNCTION__);
            /*goto again; */
            RTMP_Close(r);
            break;
        }

        if (r->Link.protocol & RTMP_FEATURE_HTTP)
            r->m_resplen -= nBytes;

        n -= nBytes;
        ptr += nBytes;
    }

    return nOriginalSize - n;
}

static int
WriteN(RTMP *r, const char *buffer, int n)
{
    const char *ptr = buffer;

    while (n > 0)
    {
        int nBytes;

        if (r->Link.protocol & RTMP_FEATURE_HTTP)
            nBytes = HTTP_Post(r, RTMPT_SEND, ptr, n);
        else if(r->m_bCustomSend && r->m_customSendFunc)
            nBytes = r->m_customSendFunc(&r->m_sb, ptr, n, r->m_customSendParam);
        else
            nBytes = RTMPSockBuf_Send(&r->m_sb, ptr, n);
        /*RTMP_Log(RTMP_LOGDEBUG, "%s: %d\n", __FUNCTION__, nBytes); */

        if (nBytes < 0)
        {
            int sockerr = GetSockError();
            RTMP_Log(RTMP_LOGERROR, "%s, RTMP send error %d (%d bytes)", __FUNCTION__,
                     sockerr, n);

            if (sockerr == EINTR && !RTMP_ctrlC)
                continue;

            r->last_error_code = sockerr;

            RTMP_Close(r);
            n = 1;
            break;
        }

        if (nBytes == 0)
            break;

        n -= nBytes;
        ptr += nBytes;
    }

    return n == 0;
}

#define SAVC(x)	static const AVal av_##x = AVC(#x)

SAVC(app);
SAVC(connect);
SAVC(flashVer);
SAVC(swfUrl);
SAVC(pageUrl);
SAVC(tcUrl);
SAVC(fpad);
SAVC(capabilities);
SAVC(audioCodecs);
SAVC(videoCodecs);
SAVC(videoFunction);
SAVC(objectEncoding);
SAVC(secureToken);
SAVC(secureTokenResponse);
SAVC(type);
SAVC(nonprivate);

static int
SendConnectPacket(RTMP *r, RTMPPacket *cp)
{
    RTMPPacket packet;
    char pbuf[4096], *pend = pbuf + sizeof(pbuf);
    char *enc;

    if (cp)
        return RTMP_SendPacket(r, cp, TRUE);

    if((r->Link.protocol & RTMP_FEATURE_WRITE) && r->m_bSendChunkSizeInfo)
    {
        packet.m_nChannel = 0x02;
        packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
        packet.m_packetType = RTMP_PACKET_TYPE_CHUNK_SIZE;
        packet.m_nTimeStamp = 0;
        packet.m_nInfoField2 = 0;
        packet.m_hasAbsTimestamp = 0;
        packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;
        packet.m_nBodySize = 4;

        enc = packet.m_body;
        AMF_EncodeInt32(enc, pend, r->m_outChunkSize);

        if(!RTMP_SendPacket(r, &packet, FALSE))
            return 0;
    }

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_connect);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_OBJECT;

    enc = AMF_EncodeNamedString(enc, pend, &av_app, &r->Link.app);
    if (!enc)
        return FALSE;
    if (r->Link.protocol & RTMP_FEATURE_WRITE)
    {
        enc = AMF_EncodeNamedString(enc, pend, &av_type, &av_nonprivate);
        if (!enc)
            return FALSE;

        if (r->Link.customConnectEncode)
        {
            r->Link.customConnectEncode(&enc, pend);
        }
    }
    if (r->Link.flashVer.av_len)
    {
        enc = AMF_EncodeNamedString(enc, pend, &av_flashVer, &r->Link.flashVer);
        if (!enc)
            return FALSE;
    }
    if (r->Link.swfUrl.av_len)
    {
        enc = AMF_EncodeNamedString(enc, pend, &av_swfUrl, &r->Link.swfUrl);
        if (!enc)
            return FALSE;
    }
    if (r->Link.tcUrl.av_len)
    {
        enc = AMF_EncodeNamedString(enc, pend, &av_tcUrl, &r->Link.tcUrl);
        if (!enc)
            return FALSE;
    }
    if (!(r->Link.protocol & RTMP_FEATURE_WRITE))
    {
        enc = AMF_EncodeNamedBoolean(enc, pend, &av_fpad, FALSE);
        if (!enc)
            return FALSE;
        enc = AMF_EncodeNamedNumber(enc, pend, &av_capabilities, 15.0);
        if (!enc)
            return FALSE;
        enc = AMF_EncodeNamedNumber(enc, pend, &av_audioCodecs, r->m_fAudioCodecs);
        if (!enc)
            return FALSE;
        enc = AMF_EncodeNamedNumber(enc, pend, &av_videoCodecs, r->m_fVideoCodecs);
        if (!enc)
            return FALSE;
        enc = AMF_EncodeNamedNumber(enc, pend, &av_videoFunction, 1.0);
        if (!enc)
            return FALSE;
        if (r->Link.pageUrl.av_len)
        {
            enc = AMF_EncodeNamedString(enc, pend, &av_pageUrl, &r->Link.pageUrl);
            if (!enc)
                return FALSE;
        }
    }
    if (r->m_fEncoding != 0.0 || r->m_bSendEncoding)
    {
        /* AMF0, AMF3 not fully supported yet */
        enc = AMF_EncodeNamedNumber(enc, pend, &av_objectEncoding, r->m_fEncoding);
        if (!enc)
            return FALSE;
    }
    if (enc + 3 >= pend)
        return FALSE;
    *enc++ = 0;
    *enc++ = 0;			/* end of object - 0x00 0x00 0x09 */
    *enc++ = AMF_OBJECT_END;

    /* add auth string */
    if (r->Link.auth.av_len)
    {
        enc = AMF_EncodeBoolean(enc, pend, r->Link.lFlags & RTMP_LF_AUTH);
        if (!enc)
            return FALSE;
        enc = AMF_EncodeString(enc, pend, &r->Link.auth);
        if (!enc)
            return FALSE;
    }
    if (r->Link.extras.o_num)
    {
        int i;
        for (i = 0; i < r->Link.extras.o_num; i++)
        {
            enc = AMFProp_Encode(&r->Link.extras.o_props[i], enc, pend);
            if (!enc)
                return FALSE;
        }
    }
    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, TRUE);
}

#if 0				/* unused */
SAVC(bgHasStream);

static int
SendBGHasStream(RTMP *r, double dId, AVal *playpath)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_forceChannel = FALSE;
    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_bgHasStream);
    enc = AMF_EncodeNumber(enc, pend, dId);
    *enc++ = AMF_NULL;

    enc = AMF_EncodeString(enc, pend, playpath);
    if (enc == NULL)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, TRUE);
}
#endif

SAVC(createStream);

int
RTMP_SendCreateStream(RTMP *r)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_createStream);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;		/* NULL */

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, TRUE);
}

SAVC(FCSubscribe);

static int
SendFCSubscribe(RTMP *r, AVal *subscribepath)
{
    RTMPPacket packet;
    char pbuf[512], *pend = pbuf + sizeof(pbuf);
    char *enc;
    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    RTMP_Log(RTMP_LOGDEBUG, "FCSubscribe: %s", subscribepath->av_val);
    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_FCSubscribe);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeString(enc, pend, subscribepath);

    if (!enc)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, TRUE);
}

/* Justin.tv specific authentication */
static const AVal av_NetStream_Authenticate_UsherToken = AVC("NetStream.Authenticate.UsherToken");

static int
SendUsherToken(RTMP *r, AVal *usherToken)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;
    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    RTMP_Log(RTMP_LOGDEBUG, "UsherToken: %s", usherToken->av_val);
    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_NetStream_Authenticate_UsherToken);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeString(enc, pend, usherToken);

    if (!enc)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, FALSE);
}
/******************************************/

SAVC(releaseStream);

static int
SendReleaseStream(RTMP *r, int streamIdx)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_releaseStream);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeString(enc, pend, &r->Link.streams[streamIdx].playpath);
    if (!enc)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(FCPublish);

static int
SendFCPublish(RTMP *r, int streamIdx)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_FCPublish);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeString(enc, pend, &r->Link.streams[streamIdx].playpath);
    if (!enc)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(FCUnpublish);

static int
SendFCUnpublish(RTMP *r, int streamIdx)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_FCUnpublish);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeString(enc, pend, &r->Link.streams[streamIdx].playpath);
    if (!enc)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(publish);
SAVC(live);

static int
SendPublish(RTMP *r, int streamIdx)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x04;	/* source channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = r->Link.streams[streamIdx].id;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_publish);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeString(enc, pend, &r->Link.streams[streamIdx].playpath);
    if (!enc)
        return FALSE;

    /* FIXME: should we choose live based on Link.lFlags & RTMP_LF_LIVE? */
    enc = AMF_EncodeString(enc, pend, &av_live);
    if (!enc)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, TRUE);
}

SAVC(deleteStream);

static int
SendDeleteStream(RTMP *r, double dStreamId)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_deleteStream);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeNumber(enc, pend, dStreamId);

    packet.m_nBodySize = enc - packet.m_body;

    /* no response expected */
    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(pause);

int
RTMP_SendPause(RTMP *r, int DoPause, int iTime)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x08;	/* video channel */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_pause);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeBoolean(enc, pend, DoPause);
    enc = AMF_EncodeNumber(enc, pend, (double)iTime);

    packet.m_nBodySize = enc - packet.m_body;

    RTMP_Log(RTMP_LOGDEBUG, "%s, %d, pauseTime=%d", __FUNCTION__, DoPause, iTime);
    return RTMP_SendPacket(r, &packet, TRUE);
}

int RTMP_Pause(RTMP *r, int DoPause)
{
    if (DoPause)
        r->m_pauseStamp = r->m_mediaChannel < r->m_channelsAllocatedIn ?
                          r->m_channelTimestamp[r->m_mediaChannel] : 0;
    return RTMP_SendPause(r, DoPause, r->m_pauseStamp);
}

SAVC(seek);

int
RTMP_SendSeek(RTMP *r, int iTime)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x08;	/* video channel */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_seek);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeNumber(enc, pend, (double)iTime);

    packet.m_nBodySize = enc - packet.m_body;

    r->m_read.flags |= RTMP_READ_SEEKING;
    r->m_read.nResumeTS = 0;

    return RTMP_SendPacket(r, &packet, TRUE);
}

int
RTMP_SendServerBW(RTMP *r)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);

    packet.m_nChannel = 0x02;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
    packet.m_packetType = RTMP_PACKET_TYPE_SERVER_BW;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    packet.m_nBodySize = 4;

    AMF_EncodeInt32(packet.m_body, pend, r->m_nServerBW);
    return RTMP_SendPacket(r, &packet, FALSE);
}

int
RTMP_SendClientBW(RTMP *r)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);

    packet.m_nChannel = 0x02;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
    packet.m_packetType = RTMP_PACKET_TYPE_CLIENT_BW;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    packet.m_nBodySize = 5;

    AMF_EncodeInt32(packet.m_body, pend, r->m_nClientBW);
    packet.m_body[4] = r->m_nClientBW2;
    return RTMP_SendPacket(r, &packet, FALSE);
}

static int
SendBytesReceived(RTMP *r)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);

    packet.m_nChannel = 0x02;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_BYTES_READ_REPORT;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    packet.m_nBodySize = 4;

    AMF_EncodeInt32(packet.m_body, pend, r->m_nBytesIn);	/* hard coded for now */
    r->m_nBytesInSent = r->m_nBytesIn;

    /*RTMP_Log(RTMP_LOGDEBUG, "Send bytes report. 0x%x (%d bytes)", (unsigned int)m_nBytesIn, m_nBytesIn); */
    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(_checkbw);

static int
SendCheckBW(RTMP *r)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;	/* RTMP_GetTime(); */
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av__checkbw);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;

    packet.m_nBodySize = enc - packet.m_body;

    /* triggers _onbwcheck and eventually results in _onbwdone */
    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(_result);

static int
SendCheckBWResult(RTMP *r, double txn)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0x16 * r->m_nBWCheckCounter;	/* temp inc value. till we figure it out. */
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av__result);
    enc = AMF_EncodeNumber(enc, pend, txn);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeNumber(enc, pend, (double)r->m_nBWCheckCounter++);

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(ping);
SAVC(pong);

static int
SendPong(RTMP *r, double txn)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0x16 * r->m_nBWCheckCounter;	/* temp inc value. till we figure it out. */
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_pong);
    enc = AMF_EncodeNumber(enc, pend, txn);
    *enc++ = AMF_NULL;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, FALSE);
}

SAVC(play);

static int
SendPlay(RTMP *r, int streamIdx)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x08;	/* we make 8 our stream channel */
    packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = r->Link.streams[streamIdx].id; /*0x01000000; */
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_play);
    enc = AMF_EncodeNumber(enc, pend, ++r->m_numInvokes);
    *enc++ = AMF_NULL;

    RTMP_Log(RTMP_LOGDEBUG, "%s, seekTime=%d, stopTime=%d, sending play: %s",
             __FUNCTION__, r->Link.seekTime, r->Link.stopTime,
             r->Link.streams[streamIdx].playpath.av_val);
    enc = AMF_EncodeString(enc, pend, &r->Link.streams[streamIdx].playpath);
    if (!enc)
        return FALSE;

    /* Optional parameters start and len.
     *
     * start: -2, -1, 0, positive number
     *  -2: looks for a live stream, then a recorded stream,
     *      if not found any open a live stream
     *  -1: plays a live stream
     * >=0: plays a recorded streams from 'start' milliseconds
     */
    if (r->Link.lFlags & RTMP_LF_LIVE)
        enc = AMF_EncodeNumber(enc, pend, -1000.0);
    else
    {
        if (r->Link.seekTime > 0.0)
            enc = AMF_EncodeNumber(enc, pend, r->Link.seekTime);	/* resume from here */
        else
            enc = AMF_EncodeNumber(enc, pend, 0.0);	/*-2000.0);*/ /* recorded as default, -2000.0 is not reliable since that freezes the player if the stream is not found */
    }
    if (!enc)
        return FALSE;

    /* len: -1, 0, positive number
     *  -1: plays live or recorded stream to the end (default)
     *   0: plays a frame 'start' ms away from the beginning
     *  >0: plays a live or recoded stream for 'len' milliseconds
     */
    /*enc += EncodeNumber(enc, -1.0); */ /* len */
    if (r->Link.stopTime)
    {
        enc = AMF_EncodeNumber(enc, pend, r->Link.stopTime - r->Link.seekTime);
        if (!enc)
            return FALSE;
    }

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, TRUE);
}

SAVC(set_playlist);
SAVC(0);

static int
SendPlaylist(RTMP *r, int streamIdx)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x08;	/* we make 8 our stream channel */
    packet.m_headerType = RTMP_PACKET_SIZE_LARGE;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = r->Link.streams[streamIdx].id; /*0x01000000; */
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_set_playlist);
    enc = AMF_EncodeNumber(enc, pend, 0);
    *enc++ = AMF_NULL;
    *enc++ = AMF_ECMA_ARRAY;
    *enc++ = 0;
    *enc++ = 0;
    *enc++ = 0;
    *enc++ = AMF_OBJECT;
    enc = AMF_EncodeNamedString(enc, pend, &av_0, &r->Link.streams[streamIdx].playpath);
    if (!enc)
        return FALSE;
    if (enc + 3 >= pend)
        return FALSE;
    *enc++ = 0;
    *enc++ = 0;
    *enc++ = AMF_OBJECT_END;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, TRUE);
}

static int
SendSecureTokenResponse(RTMP *r, AVal *resp)
{
    RTMPPacket packet;
    char pbuf[1024], *pend = pbuf + sizeof(pbuf);
    char *enc;

    packet.m_nChannel = 0x03;	/* control channel (invoke) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_INVOKE;
    packet.m_nTimeStamp = 0;
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    enc = packet.m_body;
    enc = AMF_EncodeString(enc, pend, &av_secureTokenResponse);
    enc = AMF_EncodeNumber(enc, pend, 0.0);
    *enc++ = AMF_NULL;
    enc = AMF_EncodeString(enc, pend, resp);
    if (!enc)
        return FALSE;

    packet.m_nBodySize = enc - packet.m_body;

    return RTMP_SendPacket(r, &packet, FALSE);
}

/*
from http://jira.red5.org/confluence/display/docs/Ping:

Ping is the most mysterious message in RTMP and till now we haven't fully interpreted it yet. In summary, Ping message is used as a special command that are exchanged between client and server. This page aims to document all known Ping messages. Expect the list to grow.

The type of Ping packet is 0x4 and contains two mandatory parameters and two optional parameters. The first parameter is the type of Ping and in short integer. The second parameter is the target of the ping. As Ping is always sent in Channel 2 (control channel) and the target object in RTMP header is always 0 which means the Connection object, it's necessary to put an extra parameter to indicate the exact target object the Ping is sent to. The second parameter takes this responsibility. The value has the same meaning as the target object field in RTMP header. (The second value could also be used as other purposes, like RTT Ping/Pong. It is used as the timestamp.) The third and fourth parameters are optional and could be looked upon as the parameter of the Ping packet. Below is an unexhausted list of Ping messages.

    * type 0: Clear the stream. No third and fourth parameters. The second parameter could be 0. After the connection is established, a Ping 0,0 will be sent from server to client. The message will also be sent to client on the start of Play and in response of a Seek or Pause/Resume request. This Ping tells client to re-calibrate the clock with the timestamp of the next packet server sends.
    * type 1: Tell the stream to clear the playing buffer.
    * type 3: Buffer time of the client. The third parameter is the buffer time in millisecond.
    * type 4: Reset a stream. Used together with type 0 in the case of VOD. Often sent before type 0.
    * type 6: Ping the client from server. The second parameter is the current time.
    * type 7: Pong reply from client. The second parameter is the time the server sent with his ping request.
    * type 26: SWFVerification request
    * type 27: SWFVerification response
*/
int
RTMP_SendCtrl(RTMP *r, short nType, unsigned int nObject, unsigned int nTime)
{
    RTMPPacket packet;
    char pbuf[256], *pend = pbuf + sizeof(pbuf);
    int nSize;
    char *buf;

    RTMP_Log(RTMP_LOGDEBUG, "sending ctrl. type: 0x%04x", (unsigned short)nType);

    packet.m_nChannel = 0x02;	/* control channel (ping) */
    packet.m_headerType = RTMP_PACKET_SIZE_MEDIUM;
    packet.m_packetType = RTMP_PACKET_TYPE_CONTROL;
    packet.m_nTimeStamp = 0;	/* RTMP_GetTime(); */
    packet.m_nInfoField2 = 0;
    packet.m_hasAbsTimestamp = 0;
    packet.m_body = pbuf + RTMP_MAX_HEADER_SIZE;

    switch(nType)
    {
    case 0x03:
        nSize = 10;
        break;	/* buffer time */
    case 0x1A:
        nSize = 3;
        break;	/* SWF verify request */
    case 0x1B:
        nSize = 44;
        break;	/* SWF verify response */
    default:
        nSize = 6;
        break;
    }

    packet.m_nBodySize = nSize;

    buf = packet.m_body;
    buf = AMF_EncodeInt16(buf, pend, nType);

    if (nType == 0x1B)
    {
#ifdef CRYPTO
        memcpy(buf, r->Link.SWFVerificationResponse, 42);
        RTMP_Log(RTMP_LOGDEBUG, "Sending SWFVerification response: ");
        RTMP_LogHex(RTMP_LOGDEBUG, (uint8_t *)packet.m_body, packet.m_nBodySize);
#endif
    }
    else if (nType == 0x1A)
    {
        *buf = nObject & 0xff;
    }
    else
    {
        if (nSize > 2)
            buf = AMF_EncodeInt32(buf, pend, nObject);

        if (nSize > 6)
            buf = AMF_EncodeInt32(buf, pend, nTime);
    }

    return RTMP_SendPacket(r, &packet, FALSE);
}

static void
AV_erase(RTMP_METHOD *vals, int *num, int i, int freeit)
{
    if (freeit)
        free(vals[i].name.av_val);
    (*num)--;
    for (; i < *num; i++)
    {
        vals[i] = vals[i + 1];
    }
    vals[i].name.av_val = NULL;
    vals[i].name.av_len = 0;
    vals[i].num = 0;
}

void
RTMP_DropRequest(RTMP *r, int i, int freeit)
{
    AV_erase(r->m_methodCalls, &r->m_numCalls, i, freeit);
}

static void
AV_queue(RTMP_METHOD **vals, int *num, AVal *av, int txn)
{
    char *tmp;
    if (!(*num & 0x0f))
        *vals = realloc(*vals, (*num + 16) * sizeof(RTMP_METHOD));
    tmp = malloc(av->av_len + 1);
    memcpy(tmp, av->av_val, av->av_len);
    tmp[av->av_len] = '\0';
    (*vals)[*num].num = txn;
    (*vals)[*num].name.av_len = av->av_len;
    (*vals)[(*num)++].name.av_val = tmp;
}

static void
AV_clear(RTMP_METHOD *vals, int num)
{
    int i;
    for (i = 0; i < num; i++)
        free(vals[i].name.av_val);
    free(vals);
}


#if defined(CRYPTO) || defined(USE_ONLY_MD5)
static int
b64enc(const unsigned char *input, int length, char *output, int maxsize)
{
    (void)maxsize;

#if defined(USE_MBEDTLS)
    size_t osize;
    if(mbedtls_base64_encode((unsigned char *) output, maxsize, &osize, input, length) == 0)
    {
        output[osize] = '\0';
        return 1;
    }
    else
    {
        RTMP_Log(RTMP_LOGDEBUG, "%s, error", __FUNCTION__);
        return 0;
    }
#elif defined(USE_POLARSSL)
    size_t buf_size = maxsize;
    if(base64_encode((unsigned char *) output, &buf_size, input, length) == 0)
    {
        output[buf_size] = '\0';
        return 1;
    }
    else
    {
        RTMP_Log(RTMP_LOGDEBUG, "%s, error", __FUNCTION__);
        return 0;
    }
#elif defined(USE_GNUTLS)
    if (BASE64_ENCODE_RAW_LENGTH(length) <= maxsize)
        base64_encode_raw((uint8_t*) output, length, input);
    else
    {
        RTMP_Log(RTMP_LOGDEBUG, "%s, error", __FUNCTION__);
        return 0;
    }
#elif defined(USE_ONLY_MD5)
    if ((((length + 2) / 3) * 4) <= maxsize)
    {
        base64_encodestate state;

        base64_init_encodestate(&state);
        output += base64_encode_block((const char *)input, length, output, &state);
        base64_encode_blockend(output, &state);
    }
    else
    {
        RTMP_Log(RTMP_LOGDEBUG, "%s, error", __FUNCTION__);
        return 0;
    }

#else   /* USE_OPENSSL */
    BIO *bmem, *b64;
    BUF_MEM *bptr;

    b64 = BIO_new(BIO_f_base64());
    bmem = BIO_new(BIO_s_mem());
    b64 = BIO_push(b64, bmem);
    BIO_write(b64, input, length);
    if (BIO_flush(b64) == 1)
    {
        BIO_get_mem_ptr(b64, &bptr);
        memcpy(output, bptr->data, bptr->length-1);
        output[bptr->length-1] = '\0';
    }
    else
    {
        RTMP_Log(RTMP_LOGDEBUG, "%s, error", __FUNCTION__);
        return 0;
    }
    BIO_free_all(b64);
#endif
    return 1;
}

#if defined(USE_MBEDTLS)
typedef	mbedtls_md5_context MD5_CTX;

#if MBEDTLS_VERSION_NUMBER >= 0x02070000 && MBEDTLS_VERSION_MAJOR < 3
#define MD5_Init(ctx)	mbedtls_md5_init(ctx); mbedtls_md5_starts_ret(ctx)
#define MD5_Update(ctx,data,len)	mbedtls_md5_update_ret(ctx,(unsigned char *)data,len)
#define MD5_Final(dig,ctx)	mbedtls_md5_finish_ret(ctx,dig); mbedtls_md5_free(ctx)
#else
#define MD5_Init(ctx)	mbedtls_md5_init(ctx); mbedtls_md5_starts(ctx)
#define MD5_Update(ctx,data,len)	mbedtls_md5_update(ctx,(unsigned char *)data,len)
#define MD5_Final(dig,ctx)	mbedtls_md5_finish(ctx,dig); mbedtls_md5_free(ctx)
#endif

#elif defined(USE_POLARSSL)
#define MD5_CTX	md5_context
#define MD5_Init(ctx)	md5_starts(ctx)
#define MD5_Update(ctx,data,len)	md5_update(ctx,(unsigned char *)data,len)
#define MD5_Final(dig,ctx)	md5_finish(ctx,dig)
#elif defined(USE_GNUTLS)
typedef struct md5_ctx	MD5_CTX;
#define MD5_Init(ctx)	md5_init(ctx)
#define MD5_Update(ctx,data,len)	md5_update(ctx,len,data)
#define MD5_Final(dig,ctx)	md5_digest(ctx,MD5_DIGEST_LENGTH,dig)
#else
#endif

static const AVal av_authmod_adobe = AVC("authmod=adobe");
static const AVal av_authmod_llnw  = AVC("authmod=llnw");

static void hexenc(unsigned char *inbuf, int len, char *dst)
{
    char *ptr = dst;
    while(len--)
    {
        sprintf(ptr, "%02x", *inbuf++);
        ptr += 2;
    }
    *ptr = '\0';
}

static char *AValChr(AVal *av, char c)
{
    int i;
    for (i = 0; i < av->av_len; i++)
    {
        if (av->av_val[i] == c)
            return &av->av_val[i];
    }
    return NULL;
}

static int
PublisherAuth(RTMP *r, AVal *description)
{
    char *token_in = NULL;
    char *ptr;
    unsigned char md5sum_val[MD5_DIGEST_LENGTH+1];
    MD5_CTX md5ctx;
    int challenge2_data;
#define RESPONSE_LEN 32
#define CHALLENGE2_LEN 16
#define SALTED2_LEN (32+8+8+8)
#define B64DIGEST_LEN	24	/* 16 byte digest => 22 b64 chars + 2 chars padding */
#define B64INT_LEN	8	/* 4 byte int => 6 b64 chars + 2 chars padding */
#define HEXHASH_LEN	(2*MD5_DIGEST_LENGTH)
    char response[RESPONSE_LEN];
    char challenge2[CHALLENGE2_LEN];
    char salted2[SALTED2_LEN];
    AVal pubToken;

    if (strstr(description->av_val, av_authmod_adobe.av_val) != NULL)
    {
        if(strstr(description->av_val, "code=403 need auth") != NULL)
        {
            if (strstr(r->Link.app.av_val, av_authmod_adobe.av_val) != NULL)
            {
                RTMP_Log(RTMP_LOGERROR, "%s, wrong pubUser & pubPasswd for publisher auth", __FUNCTION__);
                r->Link.pFlags |= RTMP_PUB_CLEAN;
                return 0;
            }
            else if(r->Link.pubUser.av_len && r->Link.pubPasswd.av_len)
            {
                pubToken.av_val = malloc(r->Link.pubUser.av_len + av_authmod_adobe.av_len + 8);
                pubToken.av_len = sprintf(pubToken.av_val, "?%s&user=%s",
                                          av_authmod_adobe.av_val,
                                          r->Link.pubUser.av_val);
                RTMP_Log(RTMP_LOGDEBUG, "%s, pubToken1: %s", __FUNCTION__, pubToken.av_val);
                r->Link.pFlags |= RTMP_PUB_NAME;
            }
            else
            {
                RTMP_Log(RTMP_LOGERROR, "%s, need to set pubUser & pubPasswd for publisher auth", __FUNCTION__);
                r->Link.pFlags |= RTMP_PUB_CLEAN;
                return 0;
            }
        }
        else if((token_in = strstr(description->av_val, "?reason=needauth")) != NULL)
        {
            char *par, *val = NULL, *orig_ptr;
            AVal user, salt, opaque, challenge, *aptr = NULL;

            opaque.av_len = challenge.av_len = salt.av_len = user.av_len = 0;
            opaque.av_val = challenge.av_val = salt.av_val = user.av_val = NULL;

            ptr = orig_ptr = strdup(token_in);
            while (ptr)
            {
                par = ptr;
                ptr = strchr(par, '&');
                if(ptr)
                    *ptr++ = '\0';

                val =  strchr(par, '=');
                if(val)
                    *val++ = '\0';

                if (aptr)
                {
                    aptr->av_len = par - aptr->av_val - 1;
                    aptr = NULL;
                }
                if (strcmp(par, "user") == 0)
                {
                    user.av_val = val;
                    aptr = &user;
                }
                else if (strcmp(par, "salt") == 0)
                {
                    salt.av_val = val;
                    aptr = &salt;
                }
                else if (strcmp(par, "opaque") == 0)
                {
                    opaque.av_val = val;
                    aptr = &opaque;
                }
                else if (strcmp(par, "challenge") == 0)
                {
                    challenge.av_val = val;
                    aptr = &challenge;
                }

                RTMP_Log(RTMP_LOGDEBUG, "%s, par:\"%s\" = val:\"%s\"", __FUNCTION__, par, val);
            }
            if (aptr)
                aptr->av_len = (int)strlen(aptr->av_val);

            /* hash1 = base64enc(md5(user + _aodbeAuthSalt + password)) */
            MD5_Init(&md5ctx);
            MD5_Update(&md5ctx, user.av_val, user.av_len);
            MD5_Update(&md5ctx, salt.av_val, salt.av_len);
            MD5_Update(&md5ctx, r->Link.pubPasswd.av_val, r->Link.pubPasswd.av_len);
            MD5_Final(md5sum_val, &md5ctx);
            RTMP_Log(RTMP_LOGDEBUG, "%s, md5(%s%s%s) =>", __FUNCTION__,
                     user.av_val, salt.av_val, r->Link.pubPasswd.av_val);
            RTMP_LogHexString(RTMP_LOGDEBUG, md5sum_val, MD5_DIGEST_LENGTH);

            b64enc(md5sum_val, MD5_DIGEST_LENGTH, salted2, SALTED2_LEN);
            RTMP_Log(RTMP_LOGDEBUG, "%s, b64(md5_1) = %s", __FUNCTION__, salted2);

            challenge2_data = rand();

            b64enc((unsigned char *) &challenge2_data, sizeof(int), challenge2, CHALLENGE2_LEN);
            RTMP_Log(RTMP_LOGDEBUG, "%s, b64(%d) = %s", __FUNCTION__, challenge2_data, challenge2);

            MD5_Init(&md5ctx);
            MD5_Update(&md5ctx, salted2, B64DIGEST_LEN);
            /* response = base64enc(md5(hash1 + opaque + challenge2)) */
            if (opaque.av_len)
                MD5_Update(&md5ctx, opaque.av_val, opaque.av_len);
            else if (challenge.av_len)
                MD5_Update(&md5ctx, challenge.av_val, challenge.av_len);
            MD5_Update(&md5ctx, challenge2, B64INT_LEN);
            MD5_Final(md5sum_val, &md5ctx);

            RTMP_Log(RTMP_LOGDEBUG, "%s, md5(%s%s%s) =>", __FUNCTION__,
                     salted2, opaque.av_len ? opaque.av_val : "", challenge2);
            RTMP_LogHexString(RTMP_LOGDEBUG, md5sum_val, MD5_DIGEST_LENGTH);

            b64enc(md5sum_val, MD5_DIGEST_LENGTH, response, RESPONSE_LEN);
            RTMP_Log(RTMP_LOGDEBUG, "%s, b64(md5_2) = %s", __FUNCTION__, response);

            /* have all hashes, create auth token for the end of app */
            pubToken.av_val = malloc(32 + B64INT_LEN + B64DIGEST_LEN + opaque.av_len);
            pubToken.av_len = sprintf(pubToken.av_val,
                                      "&challenge=%s&response=%s&opaque=%s",
                                      challenge2,
                                      response,
                                      opaque.av_len ? opaque.av_val : "");
            RTMP_Log(RTMP_LOGDEBUG, "%s, pubToken2: %s", __FUNCTION__, pubToken.av_val);
            free(orig_ptr);
            r->Link.pFlags |= RTMP_PUB_RESP|RTMP_PUB_CLATE;
        }
        else if(strstr(description->av_val, "?reason=authfailed") != NULL)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, Authentication failed: wrong password", __FUNCTION__);
            r->Link.pFlags |= RTMP_PUB_CLEAN;
            return 0;
        }
        else if(strstr(description->av_val, "?reason=nosuchuser") != NULL)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, Authentication failed: no such user", __FUNCTION__);
            r->Link.pFlags |= RTMP_PUB_CLEAN;
            return 0;
        }
        else
        {
            RTMP_Log(RTMP_LOGERROR, "%s, Authentication failed: unknown auth mode: %s",
                     __FUNCTION__, description->av_val);
            r->Link.pFlags |= RTMP_PUB_CLEAN;
            return 0;
        }

        ptr = malloc(r->Link.app.av_len + pubToken.av_len);
        strncpy(ptr, r->Link.app.av_val, r->Link.app.av_len);
        strncpy(ptr + r->Link.app.av_len, pubToken.av_val, pubToken.av_len);
        r->Link.app.av_len += pubToken.av_len;
        if(r->Link.pFlags & RTMP_PUB_ALLOC)
            free(r->Link.app.av_val);
        r->Link.app.av_val = ptr;

        ptr = malloc(r->Link.tcUrl.av_len + pubToken.av_len);
        strncpy(ptr, r->Link.tcUrl.av_val, r->Link.tcUrl.av_len);
        strncpy(ptr + r->Link.tcUrl.av_len, pubToken.av_val, pubToken.av_len);
        r->Link.tcUrl.av_len += pubToken.av_len;
        if(r->Link.pFlags & RTMP_PUB_ALLOC)
            free(r->Link.tcUrl.av_val);
        r->Link.tcUrl.av_val = ptr;

        free(pubToken.av_val);
        r->Link.pFlags |= RTMP_PUB_ALLOC;

        RTMP_Log(RTMP_LOGDEBUG, "%s, new app: %.*s tcUrl: %.*s playpath: %s", __FUNCTION__,
                 r->Link.app.av_len, r->Link.app.av_val,
                 r->Link.tcUrl.av_len, r->Link.tcUrl.av_val,
                 r->Link.streams[r->Link.curStreamIdx].playpath.av_val);
    }
    else if (strstr(description->av_val, av_authmod_llnw.av_val) != NULL)
    {
        if(strstr(description->av_val, "code=403 need auth") != NULL)
        {
            /* This part seems to be the same for llnw and adobe */

            if (strstr(r->Link.app.av_val, av_authmod_llnw.av_val) != NULL)
            {
                RTMP_Log(RTMP_LOGERROR, "%s, wrong pubUser & pubPasswd for publisher auth", __FUNCTION__);
                r->Link.pFlags |= RTMP_PUB_CLEAN;
                return 0;
            }
            else if(r->Link.pubUser.av_len && r->Link.pubPasswd.av_len)
            {
                pubToken.av_val = malloc(r->Link.pubUser.av_len + av_authmod_llnw.av_len + 8);
                pubToken.av_len = sprintf(pubToken.av_val, "?%s&user=%s",
                                          av_authmod_llnw.av_val,
                                          r->Link.pubUser.av_val);
                RTMP_Log(RTMP_LOGDEBUG, "%s, pubToken1: %s", __FUNCTION__, pubToken.av_val);
                r->Link.pFlags |= RTMP_PUB_NAME;
            }
            else
            {
                RTMP_Log(RTMP_LOGERROR, "%s, need to set pubUser & pubPasswd for publisher auth", __FUNCTION__);
                r->Link.pFlags |= RTMP_PUB_CLEAN;
                return 0;
            }
        }
        else if((token_in = strstr(description->av_val, "?reason=needauth")) != NULL)
        {
            char *orig_ptr;
            char *par, *val = NULL;
            char hash1[HEXHASH_LEN+1], hash2[HEXHASH_LEN+1], hash3[HEXHASH_LEN+1];
            AVal user, nonce, *aptr = NULL;
            AVal apptmp;

            /* llnw auth method
             * Seems to be closely based on HTTP Digest Auth:
             *    http://tools.ietf.org/html/rfc2617
             *    http://en.wikipedia.org/wiki/Digest_access_authentication
             */

            const char authmod[] = "llnw";
            const char realm[] = "live";
            const char method[] = "publish";
            const char qop[] = "auth";
            /* nc = 1..connection count (or rather, number of times cnonce has been reused) */
            int nc = 1;
            /* nchex = hexenc(nc) (8 hex digits according to RFC 2617) */
            char nchex[9];
            /* cnonce = hexenc(4 random bytes) (initialized on first connection) */
            char cnonce[9];

            nonce.av_len = user.av_len = 0;
            nonce.av_val = user.av_val = NULL;

            ptr = orig_ptr = strdup(token_in);
            /* Extract parameters (we need user and nonce) */
            while (ptr)
            {
                par = ptr;
                ptr = strchr(par, '&');
                if(ptr)
                    *ptr++ = '\0';

                val =  strchr(par, '=');
                if(val)
                    *val++ = '\0';

                if (aptr)
                {
                    aptr->av_len = par - aptr->av_val - 1;
                    aptr = NULL;
                }
                if (strcmp(par, "user") == 0)
                {
                    user.av_val = val;
                    aptr = &user;
                }
                else if (strcmp(par, "nonce") == 0)
                {
                    nonce.av_val = val;
                    aptr = &nonce;
                }

                RTMP_Log(RTMP_LOGDEBUG, "%s, par:\"%s\" = val:\"%s\"", __FUNCTION__, par, val);
            }
            if (aptr)
                aptr->av_len = (int)strlen(aptr->av_val);

            /* FIXME: handle case where user==NULL or nonce==NULL */

            sprintf(nchex, "%08x", nc);
            sprintf(cnonce, "%08x", rand());

            /* hash1 = hexenc(md5(user + ":" + realm + ":" + password)) */
            MD5_Init(&md5ctx);
            MD5_Update(&md5ctx, user.av_val, user.av_len);
            MD5_Update(&md5ctx, ":", 1);
            MD5_Update(&md5ctx, (void *)realm, sizeof(realm)-1);
            MD5_Update(&md5ctx, ":", 1);
            MD5_Update(&md5ctx, r->Link.pubPasswd.av_val, r->Link.pubPasswd.av_len);
            MD5_Final(md5sum_val, &md5ctx);
            RTMP_Log(RTMP_LOGDEBUG, "%s, md5(%s:%s:%s) =>", __FUNCTION__,
                     user.av_val, realm, r->Link.pubPasswd.av_val);
            RTMP_LogHexString(RTMP_LOGDEBUG, md5sum_val, MD5_DIGEST_LENGTH);
            hexenc(md5sum_val, MD5_DIGEST_LENGTH, hash1);

            /* hash2 = hexenc(md5(method + ":/" + app + "/" + appInstance)) */
            /* Extract appname + appinstance without query parameters */
            apptmp = r->Link.app;
            ptr = AValChr(&apptmp, '?');
            if (ptr)
                apptmp.av_len = ptr - apptmp.av_val;

            MD5_Init(&md5ctx);
            MD5_Update(&md5ctx, (void *)method, sizeof(method)-1);
            MD5_Update(&md5ctx, ":/", 2);
            MD5_Update(&md5ctx, apptmp.av_val, apptmp.av_len);
            if (!AValChr(&apptmp, '/'))
                MD5_Update(&md5ctx, "/_definst_", sizeof("/_definst_") - 1);
            MD5_Final(md5sum_val, &md5ctx);
            RTMP_Log(RTMP_LOGDEBUG, "%s, md5(%s:/%.*s) =>", __FUNCTION__,
                     method, apptmp.av_len, apptmp.av_val);
            RTMP_LogHexString(RTMP_LOGDEBUG, md5sum_val, MD5_DIGEST_LENGTH);
            hexenc(md5sum_val, MD5_DIGEST_LENGTH, hash2);

            /* hash3 = hexenc(md5(hash1 + ":" + nonce + ":" + nchex + ":" + cnonce + ":" + qop + ":" + hash2)) */
            MD5_Init(&md5ctx);
            MD5_Update(&md5ctx, hash1, HEXHASH_LEN);
            MD5_Update(&md5ctx, ":", 1);
            MD5_Update(&md5ctx, nonce.av_val, nonce.av_len);
            MD5_Update(&md5ctx, ":", 1);
            MD5_Update(&md5ctx, nchex, sizeof(nchex)-1);
            MD5_Update(&md5ctx, ":", 1);
            MD5_Update(&md5ctx, cnonce, sizeof(cnonce)-1);
            MD5_Update(&md5ctx, ":", 1);
            MD5_Update(&md5ctx, (void *)qop, sizeof(qop)-1);
            MD5_Update(&md5ctx, ":", 1);
            MD5_Update(&md5ctx, hash2, HEXHASH_LEN);
            MD5_Final(md5sum_val, &md5ctx);
            RTMP_Log(RTMP_LOGDEBUG, "%s, md5(%s:%s:%s:%s:%s:%s) =>", __FUNCTION__,
                     hash1, nonce.av_val, nchex, cnonce, qop, hash2);
            RTMP_LogHexString(RTMP_LOGDEBUG, md5sum_val, MD5_DIGEST_LENGTH);
            hexenc(md5sum_val, MD5_DIGEST_LENGTH, hash3);

            /* pubToken = &authmod=<authmod>&user=<username>&nonce=<nonce>&cnonce=<cnonce>&nc=<nchex>&response=<hash3> */
            /* Append nonces and response to query string which already contains
             * user + authmod */
            pubToken.av_val = malloc(64 + sizeof(authmod)-1 + user.av_len + nonce.av_len + sizeof(cnonce)-1 + sizeof(nchex)-1 + HEXHASH_LEN);
            sprintf(pubToken.av_val,
                    "&nonce=%s&cnonce=%s&nc=%s&response=%s",
                    nonce.av_val, cnonce, nchex, hash3);
            pubToken.av_len = (int)strlen(pubToken.av_val);
            RTMP_Log(RTMP_LOGDEBUG, "%s, pubToken2: %s", __FUNCTION__, pubToken.av_val);
            r->Link.pFlags |= RTMP_PUB_RESP|RTMP_PUB_CLATE;

            free(orig_ptr);
        }
        else if(strstr(description->av_val, "?reason=authfail") != NULL)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, Authentication failed", __FUNCTION__);
            r->Link.pFlags |= RTMP_PUB_CLEAN;
            return 0;
        }
        else if(strstr(description->av_val, "?reason=nosuchuser") != NULL)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, Authentication failed: no such user", __FUNCTION__);
            r->Link.pFlags |= RTMP_PUB_CLEAN;
            return 0;
        }
        else
        {
            RTMP_Log(RTMP_LOGERROR, "%s, Authentication failed: unknown auth mode: %s",
                     __FUNCTION__, description->av_val);
            r->Link.pFlags |= RTMP_PUB_CLEAN;
            return 0;
        }

        ptr = malloc(r->Link.app.av_len + pubToken.av_len);
        strncpy(ptr, r->Link.app.av_val, r->Link.app.av_len);
        strncpy(ptr + r->Link.app.av_len, pubToken.av_val, pubToken.av_len);
        r->Link.app.av_len += pubToken.av_len;
        if(r->Link.pFlags & RTMP_PUB_ALLOC)
            free(r->Link.app.av_val);
        r->Link.app.av_val = ptr;

        ptr = malloc(r->Link.tcUrl.av_len + pubToken.av_len);
        strncpy(ptr, r->Link.tcUrl.av_val, r->Link.tcUrl.av_len);
        strncpy(ptr + r->Link.tcUrl.av_len, pubToken.av_val, pubToken.av_len);
        r->Link.tcUrl.av_len += pubToken.av_len;
        if(r->Link.pFlags & RTMP_PUB_ALLOC)
            free(r->Link.tcUrl.av_val);
        r->Link.tcUrl.av_val = ptr;

        free(pubToken.av_val);
        r->Link.pFlags |= RTMP_PUB_ALLOC;

        RTMP_Log(RTMP_LOGDEBUG, "%s, new app: %.*s tcUrl: %.*s playpath: %s", __FUNCTION__,
                 r->Link.app.av_len, r->Link.app.av_val,
                 r->Link.tcUrl.av_len, r->Link.tcUrl.av_val,
                 r->Link.streams[r->Link.curStreamIdx].playpath.av_val);
    }
    else
    {
        return 0;
    }
    return 1;
}
#endif


SAVC(onBWDone);
SAVC(onFCSubscribe);
SAVC(onFCUnsubscribe);
SAVC(_onbwcheck);
SAVC(_onbwdone);
SAVC(_error);
SAVC(close);
SAVC(code);
SAVC(level);
SAVC(description);
SAVC(onStatus);
SAVC(playlist_ready);
static const AVal av_NetStream_Failed = AVC("NetStream.Failed");
static const AVal av_NetStream_Play_Failed = AVC("NetStream.Play.Failed");
static const AVal av_NetStream_Play_StreamNotFound =
    AVC("NetStream.Play.StreamNotFound");
static const AVal av_NetConnection_Connect_InvalidApp =
    AVC("NetConnection.Connect.InvalidApp");
static const AVal av_NetStream_Play_Start = AVC("NetStream.Play.Start");
static const AVal av_NetStream_Play_Complete = AVC("NetStream.Play.Complete");
static const AVal av_NetStream_Play_Stop = AVC("NetStream.Play.Stop");
static const AVal av_NetStream_Seek_Notify = AVC("NetStream.Seek.Notify");
static const AVal av_NetStream_Pause_Notify = AVC("NetStream.Pause.Notify");
static const AVal av_NetStream_Play_PublishNotify =
    AVC("NetStream.Play.PublishNotify");
static const AVal av_NetStream_Play_UnpublishNotify =
    AVC("NetStream.Play.UnpublishNotify");
static const AVal av_NetStream_Publish_Start = AVC("NetStream.Publish.Start");
static const AVal av_NetStream_Publish_Rejected = AVC("NetStream.Publish.Rejected");
static const AVal av_NetStream_Publish_Denied = AVC("NetStream.Publish.Denied");
static const AVal av_NetStream_Publish_BadName = AVC("NetStream.Publish.BadName");


/* Returns 0 for OK/Failed/error, 1 for 'Stop or Complete' */
static int
HandleInvoke(RTMP *r, const char *body, unsigned int nBodySize)
{
    AMFObject obj;
    AVal method;
    double txn;
    int ret = 0, nRes;
    if (body[0] != 0x02)		/* make sure it is a string method name we start with */
    {
        RTMP_Log(RTMP_LOGWARNING, "%s, Sanity failed. no string method in invoke packet",
                 __FUNCTION__);
        return 0;
    }

    nRes = AMF_Decode(&obj, body, nBodySize, FALSE);
    if (nRes < 0)
    {
        RTMP_Log(RTMP_LOGERROR, "%s, error decoding invoke packet", __FUNCTION__);
        return 0;
    }

    AMF_Dump(&obj);
    AMFProp_GetString(AMF_GetProp(&obj, NULL, 0), &method);
    txn = AMFProp_GetNumber(AMF_GetProp(&obj, NULL, 1));
    RTMP_Log(RTMP_LOGDEBUG, "%s, server invoking <%s>", __FUNCTION__, method.av_val);

    if (AVMATCH(&method, &av__result))
    {
        AVal methodInvoked = {0};
        int i;

        for (i=0; i<r->m_numCalls; i++)
        {
            if (r->m_methodCalls[i].num == (int)txn)
            {
                methodInvoked = r->m_methodCalls[i].name;
                AV_erase(r->m_methodCalls, &r->m_numCalls, i, FALSE);
                break;
            }
        }
        if (!methodInvoked.av_val)
        {
            RTMP_Log(RTMP_LOGDEBUG, "%s, received result id %f without matching request",
                     __FUNCTION__, txn);
            goto leave;
        }

        RTMP_Log(RTMP_LOGDEBUG, "%s, received result for method call <%s>", __FUNCTION__,
                 methodInvoked.av_val);

        if (AVMATCH(&methodInvoked, &av_connect))
        {
            if (r->Link.token.av_len)
            {
                AMFObjectProperty p;
                if (RTMP_FindFirstMatchingProperty(&obj, &av_secureToken, &p))
                {
                    DecodeTEA(&r->Link.token, &p.p_vu.p_aval);
                    SendSecureTokenResponse(r, &p.p_vu.p_aval);
                }
            }
            if (r->Link.protocol & RTMP_FEATURE_WRITE)
            {
                for (int i = 0; i < r->Link.nStreams; i++)
                    SendReleaseStream(r, i);
                for (int i = 0; i < r->Link.nStreams; i++)
                    SendFCPublish(r, i);
            }
            else
            {
                RTMP_SendServerBW(r);
                RTMP_SendCtrl(r, 3, 0, 300);
            }

            for (int i = 0; i < r->Link.nStreams; i++)
            	RTMP_SendCreateStream(r);

            if (!(r->Link.protocol & RTMP_FEATURE_WRITE))
            {
                /* Authenticate on Justin.tv legacy servers before sending FCSubscribe */
                if (r->Link.usherToken.av_len)
                    SendUsherToken(r, &r->Link.usherToken);
                /* Send the FCSubscribe if live stream or if subscribepath is set */
                if (r->Link.subscribepath.av_len)
                    SendFCSubscribe(r, &r->Link.subscribepath);
                else if (r->Link.lFlags & RTMP_LF_LIVE)
                {
                    for (int i = 0; i < r->Link.nStreams; i++)
                        SendFCSubscribe(r, &r->Link.streams[i].playpath);
                }
            }
        }
        else if (AVMATCH(&methodInvoked, &av_createStream))
        {
            int id = (int)AMFProp_GetNumber(AMF_GetProp(&obj, NULL, 3));
            r->Link.streams[r->Link.curStreamIdx].id = id;

            if (r->Link.protocol & RTMP_FEATURE_WRITE)
                SendPublish(r, r->Link.curStreamIdx);
            else
            {
                if (r->Link.lFlags & RTMP_LF_PLST)
                    SendPlaylist(r, r->Link.curStreamIdx);
                SendPlay(r, r->Link.curStreamIdx);
                RTMP_SendCtrl(r, 3, id, r->m_nBufferMS);
            }

            r->Link.curStreamIdx++;
        }
        else if (AVMATCH(&methodInvoked, &av_play) ||
                 AVMATCH(&methodInvoked, &av_publish))
        {
            r->m_bPlaying = TRUE;
            r->Link.playingStreams++;
        }
        free(methodInvoked.av_val);
    }
    else if (AVMATCH(&method, &av_onBWDone))
    {
        if (!r->m_nBWCheckCounter)
            SendCheckBW(r);
    }
    else if (AVMATCH(&method, &av_onFCSubscribe))
    {
        /* SendOnFCSubscribe(); */
    }
    else if (AVMATCH(&method, &av_onFCUnsubscribe))
    {
        RTMP_Close(r);
        ret = 1;
    }
    else if (AVMATCH(&method, &av_ping))
    {
        SendPong(r, txn);
    }
    else if (AVMATCH(&method, &av__onbwcheck))
    {
        SendCheckBWResult(r, txn);
    }
    else if (AVMATCH(&method, &av__onbwdone))
    {
        int i;
        for (i = 0; i < r->m_numCalls; i++)
            if (AVMATCH(&r->m_methodCalls[i].name, &av__checkbw))
            {
                AV_erase(r->m_methodCalls, &r->m_numCalls, i, TRUE);
                break;
            }
    }
    else if (AVMATCH(&method, &av__error))
    {
#if defined(CRYPTO) || defined(USE_ONLY_MD5)
        AVal methodInvoked = {0};
        int i;

        if (r->Link.protocol & RTMP_FEATURE_WRITE)
        {
            for (i=0; i<r->m_numCalls; i++)
            {
                if (r->m_methodCalls[i].num == txn)
                {
                    methodInvoked = r->m_methodCalls[i].name;
                    AV_erase(r->m_methodCalls, &r->m_numCalls, i, FALSE);
                    break;
                }
            }
            if (!methodInvoked.av_val)
            {
                RTMP_Log(RTMP_LOGDEBUG, "%s, received result id %f without matching request",
                         __FUNCTION__, txn);
                goto leave;
            }

            RTMP_Log(RTMP_LOGDEBUG, "%s, received error for method call <%s>", __FUNCTION__,
                     methodInvoked.av_val);

            if (AVMATCH(&methodInvoked, &av_connect))
            {
                AMFObject obj2;
                AVal code, level, description;
                AMFProp_GetObject(AMF_GetProp(&obj, NULL, 3), &obj2);
                AMFProp_GetString(AMF_GetProp(&obj2, &av_code, -1), &code);
                AMFProp_GetString(AMF_GetProp(&obj2, &av_level, -1), &level);
                AMFProp_GetString(AMF_GetProp(&obj2, &av_description, -1), &description);
                RTMP_Log(RTMP_LOGDEBUG, "%s, error description: %s", __FUNCTION__, description.av_val);
                /* if PublisherAuth returns 1, then reconnect */
                if (PublisherAuth(r, &description) == 1)
                {
                    RTMP_Close(r);
                    if (r->Link.pFlags & RTMP_PUB_CLATE)
                    {
                        r->Link.pFlags |= RTMP_PUB_CLEAN;
                    }
                    if (!RTMP_Connect(r, NULL) || !RTMP_ConnectStream(r, 0))
                    {
                        goto leave;
                    }
                }
            }
        }
        else
        {
            RTMP_Log(RTMP_LOGERROR, "rtmp server sent error");
        }
        free(methodInvoked.av_val);
#else
        RTMP_Log(RTMP_LOGERROR, "rtmp server sent error");
#endif
    }
    else if (AVMATCH(&method, &av_close))
    {
        RTMP_Log(RTMP_LOGERROR, "rtmp server requested close");
        RTMP_Close(r);

        // disabled this for now, if the server sends an rtmp close message librtmp
        // will enter an infinite loop here until stack is exhausted.
#if 0 && (defined(CRYPTO) || defined(USE_ONLY_MD5))
        if ((r->Link.protocol & RTMP_FEATURE_WRITE) &&
                !(r->Link.pFlags & RTMP_PUB_CLEAN) &&
                (  !(r->Link.pFlags & RTMP_PUB_NAME) ||
                   !(r->Link.pFlags & RTMP_PUB_RESP) ||
                   (r->Link.pFlags & RTMP_PUB_CLATE) ) )
        {
            /* clean later */
            if(r->Link.pFlags & RTMP_PUB_CLATE)
                r->Link.pFlags |= RTMP_PUB_CLEAN;
            RTMP_Log(RTMP_LOGERROR, "authenticating publisher");

            if (!RTMP_Connect(r, NULL) || !RTMP_ConnectStream(r, 0))
                goto leave;
        }
#endif
    }
    else if (AVMATCH(&method, &av_onStatus))
    {
        AMFObject obj2;
        AVal code, level, description;
        AMFProp_GetObject(AMF_GetProp(&obj, NULL, 3), &obj2);
        AMFProp_GetString(AMF_GetProp(&obj2, &av_code, -1), &code);
        AMFProp_GetString(AMF_GetProp(&obj2, &av_level, -1), &level);
        AMFProp_GetString(AMF_GetProp(&obj2, &av_description, -1), &description);

        RTMP_Log(RTMP_LOGDEBUG, "%s, onStatus: %s", __FUNCTION__, code.av_val);
        if (AVMATCH(&code, &av_NetStream_Failed)
                || AVMATCH(&code, &av_NetStream_Play_Failed)
                || AVMATCH(&code, &av_NetStream_Play_StreamNotFound)
                || AVMATCH(&code, &av_NetConnection_Connect_InvalidApp)
                || AVMATCH(&code, &av_NetStream_Publish_Rejected)
                || AVMATCH(&code, &av_NetStream_Publish_Denied)
                || AVMATCH(&code, &av_NetStream_Publish_BadName))
        {
            r->m_stream_id = -1;
            RTMP_Close(r);

            if (description.av_len)
                RTMP_Log(RTMP_LOGERROR, "%s:\n%s (%s)", r->Link.tcUrl.av_val, code.av_val, description.av_val);
            else
                RTMP_Log(RTMP_LOGERROR, "%s:\n%s", r->Link.tcUrl.av_val, code.av_val);
        }

        else if (AVMATCH(&code, &av_NetStream_Play_Start)
                 || AVMATCH(&code, &av_NetStream_Play_PublishNotify))
        {
            int i;
            r->m_bPlaying = TRUE;
            for (i = 0; i < r->m_numCalls; i++)
            {
                if (AVMATCH(&r->m_methodCalls[i].name, &av_play))
                {
                    AV_erase(r->m_methodCalls, &r->m_numCalls, i, TRUE);
                    break;
                }
            }
        }

        else if (AVMATCH(&code, &av_NetStream_Publish_Start))
        {
            int i;
            r->m_bPlaying = TRUE;
            for (i = 0; i < r->m_numCalls; i++)
            {
                if (AVMATCH(&r->m_methodCalls[i].name, &av_publish))
                {
                    AV_erase(r->m_methodCalls, &r->m_numCalls, i, TRUE);
                    break;
                }
            }
        }

        /* Return 1 if this is a Play.Complete or Play.Stop */
        else if (AVMATCH(&code, &av_NetStream_Play_Complete)
                 || AVMATCH(&code, &av_NetStream_Play_Stop)
                 || AVMATCH(&code, &av_NetStream_Play_UnpublishNotify))
        {
            RTMP_Close(r);
            ret = 1;
        }

        else if (AVMATCH(&code, &av_NetStream_Seek_Notify))
        {
            r->m_read.flags &= ~RTMP_READ_SEEKING;
        }

        else if (AVMATCH(&code, &av_NetStream_Pause_Notify))
        {
            if (r->m_pausing == 1 || r->m_pausing == 2)
            {
                RTMP_SendPause(r, FALSE, r->m_pauseStamp);
                r->m_pausing = 3;
            }
        }

        else
        {
            RTMP_Log(RTMP_LOGWARNING, "Unhandled: %s:\n%s", r->Link.tcUrl.av_val, code.av_val);
            if (description.av_len)
                RTMP_Log(RTMP_LOGDEBUG, "Description: %s", description.av_val);
        }
    }
    else if (AVMATCH(&method, &av_playlist_ready))
    {
        int i;
        for (i = 0; i < r->m_numCalls; i++)
        {
            if (AVMATCH(&r->m_methodCalls[i].name, &av_set_playlist))
            {
                AV_erase(r->m_methodCalls, &r->m_numCalls, i, TRUE);
                break;
            }
        }
    }
    else
    {

    }
leave:
    AMF_Reset(&obj);
    return ret;
}

int
RTMP_FindFirstMatchingProperty(AMFObject *obj, const AVal *name,
                               AMFObjectProperty * p)
{
    int n;
    /* this is a small object search to locate the "duration" property */
    for (n = 0; n < obj->o_num; n++)
    {
        AMFObjectProperty *prop = AMF_GetProp(obj, NULL, n);

        if (AVMATCH(&prop->p_name, name))
        {
            memcpy(p, prop, sizeof(*prop));
            return TRUE;
        }

        if (prop->p_type == AMF_OBJECT || prop->p_type == AMF_ECMA_ARRAY)
        {
            if (RTMP_FindFirstMatchingProperty(&prop->p_vu.p_object, name, p))
                return TRUE;
        }
    }
    return FALSE;
}

/* Like above, but only check if name is a prefix of property */
int
RTMP_FindPrefixProperty(AMFObject *obj, const AVal *name,
                        AMFObjectProperty * p)
{
    int n;
    for (n = 0; n < obj->o_num; n++)
    {
        AMFObjectProperty *prop = AMF_GetProp(obj, NULL, n);

        if (prop->p_name.av_len > name->av_len &&
                !memcmp(prop->p_name.av_val, name->av_val, name->av_len))
        {
            memcpy(p, prop, sizeof(*prop));
            return TRUE;
        }

        if (prop->p_type == AMF_OBJECT)
        {
            if (RTMP_FindPrefixProperty(&prop->p_vu.p_object, name, p))
                return TRUE;
        }
    }
    return FALSE;
}

static int
DumpMetaData(AMFObject *obj)
{
    AMFObjectProperty *prop;
    int n, len;
    for (n = 0; n < obj->o_num; n++)
    {
        char str[256] = "";
        prop = AMF_GetProp(obj, NULL, n);
        switch (prop->p_type)
        {
        case AMF_OBJECT:
        case AMF_ECMA_ARRAY:
        case AMF_STRICT_ARRAY:
            if (prop->p_name.av_len)
                RTMP_Log(RTMP_LOGINFO, "%.*s:", prop->p_name.av_len, prop->p_name.av_val);
            DumpMetaData(&prop->p_vu.p_object);
            break;
        case AMF_NUMBER:
            snprintf(str, 255, "%.2f", prop->p_vu.p_number);
            break;
        case AMF_BOOLEAN:
            snprintf(str, 255, "%s",
                     prop->p_vu.p_number != 0. ? "TRUE" : "FALSE");
            break;
        case AMF_STRING:
            len = snprintf(str, 255, "%.*s", prop->p_vu.p_aval.av_len,
                           prop->p_vu.p_aval.av_val);
            if (len >= 1 && str[len-1] == '\n')
                str[len-1] = '\0';
            break;
        case AMF_DATE:
            snprintf(str, 255, "timestamp:%.2f", prop->p_vu.p_number);
            break;
        default:
            snprintf(str, 255, "INVALID TYPE 0x%02x",
                     (unsigned char)prop->p_type);
        }
        if (str[0] && prop->p_name.av_len)
        {
            RTMP_Log(RTMP_LOGINFO, "  %-22.*s%s", prop->p_name.av_len,
                     prop->p_name.av_val, str);
        }
    }
    return FALSE;
}

SAVC(onMetaData);
SAVC(duration);
SAVC(video);
SAVC(audio);

static int
HandleMetadata(RTMP *r, char *body, unsigned int len)
{
    /* allright we get some info here, so parse it and print it */
    /* also keep duration or filesize to make a nice progress bar */

    AMFObject obj;
    AVal metastring;
    int ret = FALSE;

    int nRes = AMF_Decode(&obj, body, len, FALSE);
    if (nRes < 0)
    {
        RTMP_Log(RTMP_LOGERROR, "%s, error decoding meta data packet", __FUNCTION__);
        return FALSE;
    }

    AMF_Dump(&obj);
    AMFProp_GetString(AMF_GetProp(&obj, NULL, 0), &metastring);

    if (AVMATCH(&metastring, &av_onMetaData))
    {
        AMFObjectProperty prop;
        /* Show metadata */
        RTMP_Log(RTMP_LOGINFO, "Metadata:");
        DumpMetaData(&obj);
        if (RTMP_FindFirstMatchingProperty(&obj, &av_duration, &prop))
        {
            r->m_fDuration = prop.p_vu.p_number;
            /*RTMP_Log(RTMP_LOGDEBUG, "Set duration: %.2f", m_fDuration); */
        }
        /* Search for audio or video tags */
        if (RTMP_FindPrefixProperty(&obj, &av_video, &prop))
            r->m_read.dataType |= 1;
        if (RTMP_FindPrefixProperty(&obj, &av_audio, &prop))
            r->m_read.dataType |= 4;
        ret = TRUE;
    }
    AMF_Reset(&obj);
    return ret;
}

static void
HandleChangeChunkSize(RTMP *r, const RTMPPacket *packet)
{
    if (packet->m_nBodySize >= 4)
    {
        r->m_inChunkSize = AMF_DecodeInt32(packet->m_body);
        RTMP_Log(RTMP_LOGDEBUG, "%s, received: chunk size change to %d", __FUNCTION__,
                 r->m_inChunkSize);
    }
}

static void
HandleAudio(RTMP *r, const RTMPPacket *packet)
{
	(void)r;
	(void)packet;
}

static void
HandleVideo(RTMP *r, const RTMPPacket *packet)
{
	(void)r;
	(void)packet;
}

static void
HandleCtrl(RTMP *r, const RTMPPacket *packet)
{
    short nType = -1;
    unsigned int tmp;
    if (packet->m_body && packet->m_nBodySize >= 2)
        nType = AMF_DecodeInt16(packet->m_body);
    RTMP_Log(RTMP_LOGDEBUG, "%s, received ctrl. type: %d, len: %d", __FUNCTION__, nType,
             packet->m_nBodySize);
    /*RTMP_LogHex(packet.m_body, packet.m_nBodySize); */

    if (packet->m_nBodySize >= 6)
    {
        switch (nType)
        {
        case 0:
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Stream Begin %d", __FUNCTION__, tmp);
            break;

        case 1:
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Stream EOF %d", __FUNCTION__, tmp);
            if (r->m_pausing == 1)
                r->m_pausing = 2;
            break;

        case 2:
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Stream Dry %d", __FUNCTION__, tmp);
            break;

        case 4:
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Stream IsRecorded %d", __FUNCTION__, tmp);
            break;

        case 6:		/* server ping. reply with pong. */
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Ping %d", __FUNCTION__, tmp);
            RTMP_SendCtrl(r, 0x07, tmp, 0);
            break;

            /* FMS 3.5 servers send the following two controls to let the client
             * know when the server has sent a complete buffer. I.e., when the
             * server has sent an amount of data equal to m_nBufferMS in duration.
             * The server meters its output so that data arrives at the client
             * in realtime and no faster.
             *
             * The rtmpdump program tries to set m_nBufferMS as large as
             * possible, to force the server to send data as fast as possible.
             * In practice, the server appears to cap this at about 1 hour's
             * worth of data. After the server has sent a complete buffer, and
             * sends this BufferEmpty message, it will wait until the play
             * duration of that buffer has passed before sending a new buffer.
             * The BufferReady message will be sent when the new buffer starts.
             * (There is no BufferReady message for the very first buffer;
             * presumably the Stream Begin message is sufficient for that
             * purpose.)
             *
             * If the network speed is much faster than the data bitrate, then
             * there may be long delays between the end of one buffer and the
             * start of the next.
             *
             * Since usually the network allows data to be sent at
             * faster than realtime, and rtmpdump wants to download the data
             * as fast as possible, we use this RTMP_LF_BUFX hack: when we
             * get the BufferEmpty message, we send a Pause followed by an
             * Unpause. This causes the server to send the next buffer immediately
             * instead of waiting for the full duration to elapse. (That's
             * also the purpose of the ToggleStream function, which rtmpdump
             * calls if we get a read timeout.)
             *
             * Media player apps don't need this hack since they are just
             * going to play the data in realtime anyway. It also doesn't work
             * for live streams since they obviously can only be sent in
             * realtime. And it's all moot if the network speed is actually
             * slower than the media bitrate.
             */
        case 31:
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Stream BufferEmpty %d", __FUNCTION__, tmp);
            if (!(r->Link.lFlags & RTMP_LF_BUFX))
                break;
            if (!r->m_pausing)
            {
                r->m_pauseStamp = r->m_mediaChannel < r->m_channelsAllocatedIn ?
                                  r->m_channelTimestamp[r->m_mediaChannel] : 0;
                RTMP_SendPause(r, TRUE, r->m_pauseStamp);
                r->m_pausing = 1;
            }
            else if (r->m_pausing == 2)
            {
                RTMP_SendPause(r, FALSE, r->m_pauseStamp);
                r->m_pausing = 3;
            }
            break;

        case 32:
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Stream BufferReady %d", __FUNCTION__, tmp);
            break;

        default:
            tmp = AMF_DecodeInt32(packet->m_body + 2);
            RTMP_Log(RTMP_LOGDEBUG, "%s, Stream xx %d", __FUNCTION__, tmp);
            break;
        }

    }

    if (nType == 0x1A)
    {
        RTMP_Log(RTMP_LOGDEBUG, "%s, SWFVerification ping received: ", __FUNCTION__);
        if (packet->m_nBodySize > 2 && packet->m_body[2] > 0x01)
        {
            RTMP_Log(RTMP_LOGERROR,
                     "%s: SWFVerification Type %d request not supported! Patches welcome...",
                     __FUNCTION__, packet->m_body[2]);
        }
#ifdef CRYPTO
        /*RTMP_LogHex(packet.m_body, packet.m_nBodySize); */

        /* respond with HMAC SHA256 of decompressed SWF, key is the 30byte player key, also the last 30 bytes of the server handshake are applied */
        else if (r->Link.SWFSize)
        {
            RTMP_SendCtrl(r, 0x1B, 0, 0);
        }
        else
        {
            RTMP_Log(RTMP_LOGERROR,
                     "%s: Ignoring SWFVerification request, use --swfVfy!",
                     __FUNCTION__);
        }
#else
        RTMP_Log(RTMP_LOGERROR,
                 "%s: Ignoring SWFVerification request, no CRYPTO support!",
                 __FUNCTION__);
#endif
    }
}

static void
HandleServerBW(RTMP *r, const RTMPPacket *packet)
{
    r->m_nServerBW = AMF_DecodeInt32(packet->m_body);
    RTMP_Log(RTMP_LOGDEBUG, "%s: server BW = %d", __FUNCTION__, r->m_nServerBW);
}

static void
HandleClientBW(RTMP *r, const RTMPPacket *packet)
{
    r->m_nClientBW = AMF_DecodeInt32(packet->m_body);
    if (packet->m_nBodySize > 4)
        r->m_nClientBW2 = packet->m_body[4];
    else
        r->m_nClientBW2 = -1;
    RTMP_Log(RTMP_LOGDEBUG, "%s: client BW = %d %d", __FUNCTION__, r->m_nClientBW,
             r->m_nClientBW2);
}

static int
DecodeInt32LE(const char *data)
{
    unsigned char *c = (unsigned char *)data;
    unsigned int val;

    val = (c[3] << 24) | (c[2] << 16) | (c[1] << 8) | c[0];
    return val;
}

static int
EncodeInt32LE(char *output, int nVal)
{
    output[0] = nVal;
    nVal >>= 8;
    output[1] = nVal;
    nVal >>= 8;
    output[2] = nVal;
    nVal >>= 8;
    output[3] = nVal;
    return 4;
}

int
RTMP_ReadPacket(RTMP *r, RTMPPacket *packet)
{
    uint8_t hbuf[RTMP_MAX_HEADER_SIZE] = { 0 };
    char *header = (char *)hbuf;
    int nSize, hSize, nToRead, nChunk;
    // int didAlloc = FALSE;
    int extendedTimestamp = 0;

    RTMP_Log(RTMP_LOGDEBUG2, "%s: fd=%d", __FUNCTION__, (int)r->m_sb.sb_socket);

    if (ReadN(r, (char *)hbuf, 1) == 0)
    {
        RTMP_Log(RTMP_LOGDEBUG, "%s, failed to read RTMP packet header", __FUNCTION__);
        return FALSE;
    }

    packet->m_headerType = (hbuf[0] & 0xc0) >> 6;
    packet->m_nChannel = (hbuf[0] & 0x3f);
    header++;
    if (packet->m_nChannel == 0)
    {
        if (ReadN(r, (char *)&hbuf[1], 1) != 1)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, failed to read RTMP packet header 2nd byte",
                     __FUNCTION__);
            return FALSE;
        }
        packet->m_nChannel = hbuf[1];
        packet->m_nChannel += 64;
        header++;
    }
    else if (packet->m_nChannel == 1)
    {
        int tmp;
        if (ReadN(r, (char *)&hbuf[1], 2) != 2)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, failed to read RTMP packet header 3nd byte",
                     __FUNCTION__);
            return FALSE;
        }
        tmp = (hbuf[2] << 8) + hbuf[1];
        packet->m_nChannel = tmp + 64;
        RTMP_Log(RTMP_LOGDEBUG, "%s, m_nChannel: %0x", __FUNCTION__, packet->m_nChannel);
        header += 2;
    }

    nSize = packetSize[packet->m_headerType];

    if (packet->m_nChannel >= r->m_channelsAllocatedIn)
    {
        int n = packet->m_nChannel + 10;
        int *timestamp = realloc(r->m_channelTimestamp, sizeof(int) * n);
        RTMPPacket **packets = realloc(r->m_vecChannelsIn, sizeof(RTMPPacket*) * n);
        if (!timestamp)
            free(r->m_channelTimestamp);
        if (!packets)
            free(r->m_vecChannelsIn);
        r->m_channelTimestamp = timestamp;
        r->m_vecChannelsIn = packets;
        if (!timestamp || !packets)
        {
            r->m_channelsAllocatedIn = 0;
            return FALSE;
        }
        memset(r->m_channelTimestamp + r->m_channelsAllocatedIn, 0, sizeof(int) * (n - r->m_channelsAllocatedIn));
        memset(r->m_vecChannelsIn + r->m_channelsAllocatedIn, 0, sizeof(RTMPPacket*) * (n - r->m_channelsAllocatedIn));
        r->m_channelsAllocatedIn = n;
    }

    if (nSize == RTMP_LARGE_HEADER_SIZE)	/* if we get a full header the timestamp is absolute */
        packet->m_hasAbsTimestamp = TRUE;

    else if (nSize < RTMP_LARGE_HEADER_SIZE)
    {
        /* using values from the last message of this channel */
        if (r->m_vecChannelsIn[packet->m_nChannel])
            memcpy(packet, r->m_vecChannelsIn[packet->m_nChannel],
                   sizeof(RTMPPacket));
    }

    nSize--;

    if (nSize > 0 && ReadN(r, header, nSize) != nSize)
    {
        RTMP_Log(RTMP_LOGERROR, "%s, failed to read RTMP packet header. type: %x",
                 __FUNCTION__, (unsigned int)hbuf[0]);
        return FALSE;
    }

    hSize = nSize + (header - (char *)hbuf);

    if (nSize >= 3)
    {
        packet->m_nTimeStamp = AMF_DecodeInt24(header);

        /*RTMP_Log(RTMP_LOGDEBUG, "%s, reading RTMP packet chunk on channel %x, headersz %i, timestamp %i, abs timestamp %i", __FUNCTION__, packet.m_nChannel, nSize, packet.m_nTimeStamp, packet.m_hasAbsTimestamp); */

        if (nSize >= 6)
        {
            packet->m_nBodySize = AMF_DecodeInt24(header + 3);
            packet->m_nBytesRead = 0;

            if (nSize > 6)
            {
                packet->m_packetType = header[6];

                if (nSize == 11)
                    packet->m_nInfoField2 = DecodeInt32LE(header + 7);
            }
        }

        extendedTimestamp = (packet->m_nTimeStamp == 0xffffff);

        if (extendedTimestamp)
        {
            if (ReadN(r, header + nSize, 4) != 4)
            {
                RTMP_Log(RTMP_LOGERROR, "%s, failed to read extended timestamp",
                         __FUNCTION__);
                return FALSE;
            }
            packet->m_nTimeStamp = AMF_DecodeInt32(header + nSize);
            hSize += 4;
        }
    }

    RTMP_LogHexString(RTMP_LOGDEBUG2, (uint8_t *)hbuf, hSize);

    if (packet->m_nBodySize > 0 && packet->m_body == NULL)
    {
        if (!RTMPPacket_Alloc(packet, packet->m_nBodySize))
        {
            RTMP_Log(RTMP_LOGDEBUG, "%s, failed to allocate packet", __FUNCTION__);
            return FALSE;
        }
        // didAlloc = TRUE;
        packet->m_headerType = (hbuf[0] & 0xc0) >> 6;
    }

    nToRead = packet->m_nBodySize - packet->m_nBytesRead;
    nChunk = r->m_inChunkSize;
    if (nToRead < nChunk)
        nChunk = nToRead;

    /* Does the caller want the raw chunk? */
    if (packet->m_chunk)
    {
        packet->m_chunk->c_headerSize = hSize;
        memcpy(packet->m_chunk->c_header, hbuf, hSize);
        packet->m_chunk->c_chunk = packet->m_body + packet->m_nBytesRead;
        packet->m_chunk->c_chunkSize = nChunk;
    }

    if (ReadN(r, packet->m_body + packet->m_nBytesRead, nChunk) != nChunk)
    {
        RTMP_Log(RTMP_LOGERROR, "%s, failed to read RTMP packet body. len: %u",
                 __FUNCTION__, packet->m_nBodySize);
        return FALSE;
    }

    RTMP_LogHexString(RTMP_LOGDEBUG2, (uint8_t *)packet->m_body + packet->m_nBytesRead, nChunk);

    packet->m_nBytesRead += nChunk;

    /* keep the packet as ref for other packets on this channel */
    if (!r->m_vecChannelsIn[packet->m_nChannel])
        r->m_vecChannelsIn[packet->m_nChannel] = malloc(sizeof(RTMPPacket));
    memcpy(r->m_vecChannelsIn[packet->m_nChannel], packet, sizeof(RTMPPacket));
    if (extendedTimestamp)
        r->m_vecChannelsIn[packet->m_nChannel]->m_nTimeStamp = 0xffffff;

    if (RTMPPacket_IsReady(packet))
    {
        /* make packet's timestamp absolute */
        if (!packet->m_hasAbsTimestamp)
            packet->m_nTimeStamp += r->m_channelTimestamp[packet->m_nChannel];	/* timestamps seem to be always relative!! */

        r->m_channelTimestamp[packet->m_nChannel] = packet->m_nTimeStamp;

        /* reset the data from the stored packet. we keep the header since we may use it later if a new packet for this channel */
        /* arrives and requests to re-use some info (small packet header) */
        r->m_vecChannelsIn[packet->m_nChannel]->m_body = NULL;
        r->m_vecChannelsIn[packet->m_nChannel]->m_nBytesRead = 0;
        r->m_vecChannelsIn[packet->m_nChannel]->m_hasAbsTimestamp = FALSE;	/* can only be false if we reuse header */
    }
    else
    {
        packet->m_body = NULL;	/* so it won't be erased on free */
    }

    return TRUE;
}

#ifndef CRYPTO
static int
HandShake(RTMP *r, int FP9HandShake)
{
    int i;
    uint32_t uptime, suptime;
    int bMatch;
    char type;
    char clientbuf[RTMP_SIG_SIZE + 1], *clientsig = clientbuf + 1;
    char serversig[RTMP_SIG_SIZE];

    clientbuf[0] = 0x03;		/* not encrypted */

    uptime = htonl(RTMP_GetTime());
    memcpy(clientsig, &uptime, 4);

    memset(&clientsig[4], 0, 4);

#ifdef _DEBUG
    for (i = 8; i < RTMP_SIG_SIZE; i++)
        clientsig[i] = 0xff;
#else
    for (i = 8; i < RTMP_SIG_SIZE; i++)
        clientsig[i] = (char)(rand() % 256);
#endif

    if (!WriteN(r, clientbuf, RTMP_SIG_SIZE + 1))
        return FALSE;

    if (ReadN(r, &type, 1) != 1)	/* 0x03 or 0x06 */
        return FALSE;

    RTMP_Log(RTMP_LOGDEBUG, "%s: Type Answer   : %02X", __FUNCTION__, type);

    if (type != clientbuf[0])
        RTMP_Log(RTMP_LOGWARNING, "%s: Type mismatch: client sent %d, server answered %d",
                 __FUNCTION__, clientbuf[0], type);

    if (ReadN(r, serversig, RTMP_SIG_SIZE) != RTMP_SIG_SIZE)
        return FALSE;

    /* decode server response */

    memcpy(&suptime, serversig, 4);
    suptime = ntohl(suptime);

    RTMP_Log(RTMP_LOGDEBUG, "%s: Server Uptime : %d", __FUNCTION__, suptime);
    RTMP_Log(RTMP_LOGDEBUG, "%s: FMS Version   : %d.%d.%d.%d", __FUNCTION__,
             serversig[4], serversig[5], serversig[6], serversig[7]);

    /* 2nd part of handshake */
    if (!WriteN(r, serversig, RTMP_SIG_SIZE))
        return FALSE;

    if (ReadN(r, serversig, RTMP_SIG_SIZE) != RTMP_SIG_SIZE)
        return FALSE;

    bMatch = (memcmp(serversig, clientsig, RTMP_SIG_SIZE) == 0);
    if (!bMatch)
    {
        RTMP_Log(RTMP_LOGWARNING, "%s, client signature does not match!", __FUNCTION__);
    }

    /* er, totally unused? */
    (void)FP9HandShake;
    return TRUE;
}
#endif

int
RTMP_SendChunk(RTMP *r, RTMPChunk *chunk)
{
    int wrote;
    char hbuf[RTMP_MAX_HEADER_SIZE];

    RTMP_Log(RTMP_LOGDEBUG2, "%s: fd=%d, size=%d", __FUNCTION__, (int)r->m_sb.sb_socket,
             chunk->c_chunkSize);
    RTMP_LogHexString(RTMP_LOGDEBUG2, (uint8_t *)chunk->c_header, chunk->c_headerSize);
    if (chunk->c_chunkSize)
    {
        char *ptr = chunk->c_chunk - chunk->c_headerSize;
        RTMP_LogHexString(RTMP_LOGDEBUG2, (uint8_t *)chunk->c_chunk, chunk->c_chunkSize);
        /* save header bytes we're about to overwrite */
        memcpy(hbuf, ptr, chunk->c_headerSize);
        memcpy(ptr, chunk->c_header, chunk->c_headerSize);
        wrote = WriteN(r, ptr, chunk->c_headerSize + chunk->c_chunkSize);
        memcpy(ptr, hbuf, chunk->c_headerSize);
    }
    else
        wrote = WriteN(r, chunk->c_header, chunk->c_headerSize);
    return wrote;
}

int
RTMP_SendPacket(RTMP *r, RTMPPacket *packet, int queue)
{
    const RTMPPacket *prevPacket;
    uint32_t last = 0;
    int nSize;
    int hSize, cSize;
    char *header, *hptr, *hend, hbuf[RTMP_MAX_HEADER_SIZE], c;
    uint32_t t;
    char *buffer, *tbuf = NULL, *toff = NULL;
    int nChunkSize;
    int tlen;

    if (packet->m_nChannel >= r->m_channelsAllocatedOut)
    {
        int n = packet->m_nChannel + 10;
        RTMPPacket **packets = realloc(r->m_vecChannelsOut, sizeof(RTMPPacket*) * n);
        if (!packets)
        {
            free(r->m_vecChannelsOut);
            r->m_vecChannelsOut = NULL;
            r->m_channelsAllocatedOut = 0;
            return FALSE;
        }
        r->m_vecChannelsOut = packets;
        memset(r->m_vecChannelsOut + r->m_channelsAllocatedOut, 0, sizeof(RTMPPacket*) * (n - r->m_channelsAllocatedOut));
        r->m_channelsAllocatedOut = n;
    }

    prevPacket = r->m_vecChannelsOut[packet->m_nChannel];
    if (prevPacket && packet->m_headerType != RTMP_PACKET_SIZE_LARGE)
    {
        /* compress a bit by using the prev packet's attributes */
        if (prevPacket->m_nBodySize == packet->m_nBodySize
                && prevPacket->m_packetType == packet->m_packetType
                && packet->m_headerType == RTMP_PACKET_SIZE_MEDIUM)
            packet->m_headerType = RTMP_PACKET_SIZE_SMALL;

        if (prevPacket->m_nTimeStamp == packet->m_nTimeStamp
                && packet->m_headerType == RTMP_PACKET_SIZE_SMALL)
            packet->m_headerType = RTMP_PACKET_SIZE_MINIMUM;
        last = prevPacket->m_nTimeStamp;
    }

    if (packet->m_headerType > 3)	/* sanity */
    {
        RTMP_Log(RTMP_LOGERROR, "sanity failed!! trying to send header of type: 0x%02x.",
                 (unsigned char)packet->m_headerType);
        return FALSE;
    }

    nSize = packetSize[packet->m_headerType];
    hSize = nSize;
    cSize = 0;
    t = packet->m_nTimeStamp - last;

    if (packet->m_body)
    {
        header = packet->m_body - nSize;
        hend = packet->m_body;
    }
    else
    {
        header = hbuf + 6;
        hend = hbuf + sizeof(hbuf);
    }

    if (packet->m_nChannel > 319)
        cSize = 2;
    else if (packet->m_nChannel > 63)
        cSize = 1;
    if (cSize)
    {
        header -= cSize;
        hSize += cSize;
    }

    if (nSize > 1 && t >= 0xffffff)
    {
        header -= 4;
        hSize += 4;
    }

    hptr = header;
    c = packet->m_headerType << 6;
    switch (cSize)
    {
    case 0:
        c |= packet->m_nChannel;
        break;
    case 1:
        break;
    case 2:
        c |= 1;
        break;
    }
    *hptr++ = c;
    if (cSize)
    {
        int tmp = packet->m_nChannel - 64;
        *hptr++ = tmp & 0xff;
        if (cSize == 2)
            *hptr++ = tmp >> 8;
    }

    if (nSize > 1)
    {
        hptr = AMF_EncodeInt24(hptr, hend, t > 0xffffff ? 0xffffff : t);
    }

    if (nSize > 4)
    {
        hptr = AMF_EncodeInt24(hptr, hend, packet->m_nBodySize);
        *hptr++ = packet->m_packetType;
    }

    if (nSize > 8)
        hptr += EncodeInt32LE(hptr, packet->m_nInfoField2);

    if (nSize > 1 && t >= 0xffffff)
        hptr = AMF_EncodeInt32(hptr, hend, t);

    nSize = packet->m_nBodySize;
    buffer = packet->m_body;
    nChunkSize = r->m_outChunkSize;

    RTMP_Log(RTMP_LOGDEBUG2, "%s: fd=%d, size=%d", __FUNCTION__, (int)r->m_sb.sb_socket,
             nSize);
    /* send all chunks in one HTTP request */
    if (r->Link.protocol & RTMP_FEATURE_HTTP)
    {
        int chunks = (nSize+nChunkSize-1) / nChunkSize;
        if (chunks > 1)
        {
            tlen = chunks * (cSize + 1) + nSize + hSize;
            tbuf = malloc(tlen);
            if (!tbuf)
                return FALSE;
            toff = tbuf;
        }
    }
    while (nSize + hSize)
    {
        int wrote;

        if (nSize < nChunkSize)
            nChunkSize = nSize;

        RTMP_LogHexString(RTMP_LOGDEBUG2, (uint8_t *)header, hSize);
        RTMP_LogHexString(RTMP_LOGDEBUG2, (uint8_t *)buffer, nChunkSize);
        if (tbuf)
        {
            memcpy(toff, header, nChunkSize + hSize);
            toff += nChunkSize + hSize;
        }
        else
        {
            wrote = WriteN(r, header, nChunkSize + hSize);
            if (!wrote)
                return FALSE;
        }
        nSize -= nChunkSize;
        buffer += nChunkSize;
        hSize = 0;

        if (nSize > 0)
        {
            header = buffer - 1;
            hSize = 1;
            if (cSize)
            {
                header -= cSize;
                hSize += cSize;
            }
            *header = (0xc0 | c);
            if (cSize)
            {
                int tmp = packet->m_nChannel - 64;
                header[1] = tmp & 0xff;
                if (cSize == 2)
                    header[2] = tmp >> 8;
            }
        }
    }
    if (tbuf)
    {
        int wrote = WriteN(r, tbuf, toff-tbuf);
        free(tbuf);
        tbuf = NULL;
        if (!wrote)
            return FALSE;
    }

    /* we invoked a remote method */
    if (packet->m_packetType == RTMP_PACKET_TYPE_INVOKE)
    {
        AVal method;
        char *ptr;
        ptr = packet->m_body + 1;
        AMF_DecodeString(ptr, &method);
        RTMP_Log(RTMP_LOGDEBUG, "Invoking %s", method.av_val);
        /* keep it in call queue till result arrives */
        if (queue)
        {
            int txn;
            ptr += 3 + method.av_len;
            txn = (int)AMF_DecodeNumber(ptr);
            AV_queue(&r->m_methodCalls, &r->m_numCalls, &method, txn);
        }
    }

    if (!r->m_vecChannelsOut[packet->m_nChannel])
        r->m_vecChannelsOut[packet->m_nChannel] = malloc(sizeof(RTMPPacket));
    memcpy(r->m_vecChannelsOut[packet->m_nChannel], packet, sizeof(RTMPPacket));
    return TRUE;
}

void
RTMP_Close(RTMP *r)
{
    int i;

    if (RTMP_IsConnected(r))
    {
        for (int idx = 0; idx < r->Link.nStreams; idx++)
        {
            if (r->Link.streams[idx].id > 0)
            {
                i = r->Link.streams[idx].id;
                r->Link.streams[idx].id = 0;
                if ((r->Link.protocol & RTMP_FEATURE_WRITE))
                    SendFCUnpublish(r, idx);
                SendDeleteStream(r, (double)i);
            }
        }
        if (r->m_clientID.av_val)
        {
            HTTP_Post(r, RTMPT_CLOSE, "", 1);
            free(r->m_clientID.av_val);
            r->m_clientID.av_val = NULL;
            r->m_clientID.av_len = 0;
        }
        RTMPSockBuf_Close(&r->m_sb);
    }

    for (int idx = 0; idx < r->Link.nStreams; idx++)
        r->Link.streams[idx].id = -1;

    r->m_stream_id = -1;
    r->m_sb.sb_socket = -1;
    r->m_nBWCheckCounter = 0;
    r->m_nBytesIn = 0;
    r->m_nBytesInSent = 0;

    if (r->m_read.flags & RTMP_READ_HEADER)
    {
        free(r->m_read.buf);
        r->m_read.buf = NULL;
    }
    r->m_read.dataType = 0;
    r->m_read.flags = 0;
    r->m_read.status = 0;
    r->m_read.nResumeTS = 0;
    r->m_read.nIgnoredFrameCounter = 0;
    r->m_read.nIgnoredFlvFrameCounter = 0;

    r->m_write.m_nBytesRead = 0;
    RTMPPacket_Free(&r->m_write);

    for (i = 0; i < r->m_channelsAllocatedIn; i++)
    {
        if (r->m_vecChannelsIn[i])
        {
            RTMPPacket_Free(r->m_vecChannelsIn[i]);
            free(r->m_vecChannelsIn[i]);
            r->m_vecChannelsIn[i] = NULL;
        }
    }
    free(r->m_vecChannelsIn);
    r->m_vecChannelsIn = NULL;
    free(r->m_channelTimestamp);
    r->m_channelTimestamp = NULL;
    r->m_channelsAllocatedIn = 0;
    for (i = 0; i < r->m_channelsAllocatedOut; i++)
    {
        if (r->m_vecChannelsOut[i])
        {
            free(r->m_vecChannelsOut[i]);
            r->m_vecChannelsOut[i] = NULL;
        }
    }
    free(r->m_vecChannelsOut);
    r->m_vecChannelsOut = NULL;
    r->m_channelsAllocatedOut = 0;
    AV_clear(r->m_methodCalls, r->m_numCalls);
    r->m_methodCalls = NULL;
    r->m_numCalls = 0;
    r->m_numInvokes = 0;

    r->m_bPlaying = FALSE;
    r->Link.playingStreams = 0;
    r->m_sb.sb_size = 0;

    r->m_msgCounter = 0;
    r->m_resplen = 0;
    r->m_unackd = 0;

    if (r->Link.lFlags & RTMP_LF_FTCU)
    {
        free(r->Link.tcUrl.av_val);
        r->Link.tcUrl.av_val = NULL;
        r->Link.lFlags ^= RTMP_LF_FTCU;
    }

    memset (&r->m_bindIP, 0, sizeof(r->m_bindIP));
    r->m_bCustomSend = 0;
    r->m_customSendFunc = NULL;
    r->m_customSendParam = NULL;

#if defined(CRYPTO) || defined(USE_ONLY_MD5)
    if (!(r->Link.protocol & RTMP_FEATURE_WRITE) || (r->Link.pFlags & RTMP_PUB_CLEAN))
    {
        for (int idx = 0; idx < r->Link.nStreams; idx++)
        {
            free(r->Link.streams[idx].playpath.av_val);
            r->Link.streams[idx].playpath.av_val = NULL;
        }

        r->Link.curStreamIdx = 0;
        r->Link.nStreams = 0;
    }

    if ((r->Link.protocol & RTMP_FEATURE_WRITE) &&
            (r->Link.pFlags & RTMP_PUB_CLEAN) &&
            (r->Link.pFlags & RTMP_PUB_ALLOC))
    {
        free(r->Link.app.av_val);
        r->Link.app.av_val = NULL;
        free(r->Link.tcUrl.av_val);
        r->Link.tcUrl.av_val = NULL;
    }
#else
    for (int idx = 0; idx < r->Link.nStreams; idx++)
    {
        free(r->Link.streams[idx].playpath.av_val);
        r->Link.streams[idx].playpath.av_val = NULL;
    }

    r->Link.curStreamIdx = 0;
    r->Link.nStreams = 0;
#endif
}

int
RTMPSockBuf_Fill(RTMPSockBuf *sb)
{
    int nBytes;

    if (!sb->sb_size)
        sb->sb_start = sb->sb_buf;

    while (1)
    {
        nBytes = (int)sizeof(sb->sb_buf) - 1 - sb->sb_size - (sb->sb_start - sb->sb_buf);
#if defined(CRYPTO) && !defined(NO_SSL)
        if (sb->sb_ssl)
        {
            nBytes = TLS_read(sb->sb_ssl, sb->sb_start + sb->sb_size, nBytes);
        }
        else
#endif
        {
            nBytes = recv(sb->sb_socket, sb->sb_start + sb->sb_size, nBytes, MSG_NOSIGNAL);
        }
        if (nBytes > 0)
        {
            sb->sb_size += nBytes;
        }
        else if (nBytes == 0)
        {
            RTMP_Log(RTMP_LOGERROR, "%s, remote host closed connection",
                     __FUNCTION__);
        }
        else
        {
            int level;
            int sockerr = GetSockError();
            if (sockerr == EWOULDBLOCK || sockerr == EAGAIN)
                level = RTMP_LOGDEBUG;
            else
                level = RTMP_LOGERROR;
            RTMP_Log(level, "%s, recv returned %d. GetSockError(): %d (%s)",
                     __FUNCTION__, nBytes, sockerr, socketerror(sockerr));
            if (sockerr == EINTR && !RTMP_ctrlC)
                continue;

            if (sockerr == EWOULDBLOCK || sockerr == EAGAIN)
            {
                sb->sb_timedout = TRUE;
                nBytes = 0;
            }
        }
        break;
    }

    return nBytes;
}

int
RTMPSockBuf_Send(RTMPSockBuf *sb, const char *buf, int len)
{
    int rc;

#if defined(RTMP_NETSTACK_DUMP)
    fwrite(buf, 1, len, netstackdump);
#endif

#if defined(CRYPTO) && !defined(NO_SSL)
    if (sb->sb_ssl)
    {
        rc = TLS_write(sb->sb_ssl, buf, len);
    }
    else
#endif
    {
        rc = send(sb->sb_socket, buf, len, MSG_NOSIGNAL);
    }
    return rc;
}

int
RTMPSockBuf_Close(RTMPSockBuf *sb)
{
#if defined(CRYPTO) && !defined(NO_SSL)
    if (sb->sb_ssl)
    {
        TLS_shutdown(sb->sb_ssl);
        TLS_close(sb->sb_ssl);
        sb->sb_ssl = NULL;
    }
#endif
    if (sb->sb_socket != INVALID_SOCKET)
        return closesocket(sb->sb_socket);
    return 0;
}

#define HEX2BIN(a)	(((a)&0x40)?((a)&0xf)+9:((a)&0xf))

static void
DecodeTEA(AVal *key, AVal *text)
{
    uint32_t *v, k[4] = { 0 }, u;
    uint32_t z, y, sum = 0, e, DELTA = 0x9e3779b9;
    int32_t p, q;
    int i, n;
    unsigned char *ptr, *out;

    /* prep key: pack 1st 16 chars into 4 LittleEndian ints */
    ptr = (unsigned char *)key->av_val;
    u = 0;
    n = 0;
    v = k;
    p = key->av_len > 16 ? 16 : key->av_len;
    for (i = 0; i < p; i++)
    {
        u |= ptr[i] << (n * 8);
        if (n == 3)
        {
            *v++ = u;
            u = 0;
            n = 0;
        }
        else
        {
            n++;
        }
    }
    /* any trailing chars */
    if (u)
        *v = u;

    /* prep text: hex2bin, multiples of 4 */
    n = (text->av_len + 7) / 8;
    out = malloc(n * 8);
    ptr = (unsigned char *)text->av_val;
    v = (uint32_t *) out;
    for (i = 0; i < n; i++)
    {
        u = (HEX2BIN(ptr[0]) << 4) + HEX2BIN(ptr[1]);
        u |= ((HEX2BIN(ptr[2]) << 4) + HEX2BIN(ptr[3])) << 8;
        u |= ((HEX2BIN(ptr[4]) << 4) + HEX2BIN(ptr[5])) << 16;
        u |= ((HEX2BIN(ptr[6]) << 4) + HEX2BIN(ptr[7])) << 24;
        *v++ = u;
        ptr += 8;
    }
    v = (uint32_t *) out;

    /* http://www.movable-type.co.uk/scripts/tea-block.html */
#define MX (((z>>5)^(y<<2)) + ((y>>3)^(z<<4))) ^ ((sum^y) + (k[(p&3)^e]^z));
    z = v[n - 1];
    y = v[0];
    q = 6 + 52 / n;
    sum = q * DELTA;
    while (sum != 0)
    {
        e = sum >> 2 & 3;
        for (p = n - 1; p > 0; p--)
            z = v[p - 1], y = v[p] -= MX;
        z = v[n - 1];
        y = v[0] -= MX;
        sum -= DELTA;
    }

    text->av_len /= 2;
    memcpy(text->av_val, out, text->av_len);
    free(out);
}

static int
HTTP_Post(RTMP *r, RTMPTCmd cmd, const char *buf, int len)
{
    char hbuf[512];
    int hlen = snprintf(hbuf, sizeof(hbuf), "POST /%s%s/%d HTTP/1.1\r\n"
                        "Host: %.*s:%d\r\n"
                        "Accept: */*\r\n"
                        "User-Agent: Shockwave Flash\r\n"
                        "Connection: Keep-Alive\r\n"
                        "Cache-Control: no-cache\r\n"
                        "Content-type: application/x-fcs\r\n"
                        "Content-length: %d\r\n\r\n", RTMPT_cmds[cmd],
                        r->m_clientID.av_val ? r->m_clientID.av_val : "",
                        r->m_msgCounter, r->Link.hostname.av_len, r->Link.hostname.av_val,
                        r->Link.port, len);
    RTMPSockBuf_Send(&r->m_sb, hbuf, hlen);
    hlen = RTMPSockBuf_Send(&r->m_sb, buf, len);
    r->m_msgCounter++;
    r->m_unackd++;
    return hlen;
}

static int
HTTP_read(RTMP *r, int fill)
{
    char *ptr;
    int hlen;

restart:
    if (fill)
        RTMPSockBuf_Fill(&r->m_sb);
    if (r->m_sb.sb_size < 13)
    {
        if (fill)
            goto restart;
        return -2;
    }
    if (strncmp(r->m_sb.sb_start, "HTTP/1.1 200 ", 13))
        return -1;
    r->m_sb.sb_start[r->m_sb.sb_size] = '\0';
    if (!strstr(r->m_sb.sb_start, "\r\n\r\n"))
    {
        if (fill)
            goto restart;
        return -2;
    }

    ptr = r->m_sb.sb_start + sizeof("HTTP/1.1 200");
    while ((ptr = strstr(ptr, "Content-")))
    {
        if (!strncasecmp(ptr+8, "length:", 7)) break;
        ptr += 8;
    }
    if (!ptr)
        return -1;
    hlen = atoi(ptr+16);
    ptr = strstr(ptr+16, "\r\n\r\n");
    if (!ptr)
        return -1;
    ptr += 4;
    if (ptr + (r->m_clientID.av_val ? 1 : hlen) > r->m_sb.sb_start + r->m_sb.sb_size)
    {
        if (fill)
            goto restart;
        return -2;
    }
    r->m_sb.sb_size -= ptr - r->m_sb.sb_start;
    r->m_sb.sb_start = ptr;
    r->m_unackd--;

    if (!r->m_clientID.av_val)
    {
        r->m_clientID.av_len = hlen;
        r->m_clientID.av_val = malloc(hlen+1);
        if (!r->m_clientID.av_val)
            return -1;
        r->m_clientID.av_val[0] = '/';
        memcpy(r->m_clientID.av_val+1, ptr, hlen-1);
        r->m_clientID.av_val[hlen] = 0;
        r->m_sb.sb_size = 0;
    }
    else
    {
        r->m_polling = *ptr++;
        r->m_resplen = hlen - 1;
        r->m_sb.sb_start++;
        r->m_sb.sb_size--;
    }
    return 0;
}

#define MAX_IGNORED_FRAMES	50

/* Read from the stream until we get a media packet.
 * Returns -3 if Play.Close/Stop, -2 if fatal error, -1 if no more media
 * packets, 0 if ignorable error, >0 if there is a media packet
 */
static int
Read_1_Packet(RTMP *r, char *buf, unsigned int buflen)
{
    uint32_t prevTagSize = 0;
    int rtnGetNextMediaPacket = 0, ret = RTMP_READ_EOF;
    RTMPPacket packet = { 0 };
    int recopy = FALSE;
    unsigned int size;
    char *ptr, *pend;
    uint32_t nTimeStamp = 0;
    unsigned int len;

    rtnGetNextMediaPacket = RTMP_GetNextMediaPacket(r, &packet);
    while (rtnGetNextMediaPacket)
    {
        char *packetBody = packet.m_body;
        unsigned int nPacketLen = packet.m_nBodySize;

        /* Return RTMP_READ_COMPLETE if this was completed nicely with
         * invoke message Play.Stop or Play.Complete
         */
        if (rtnGetNextMediaPacket == 2)
        {
            RTMP_Log(RTMP_LOGDEBUG,
                     "Got Play.Complete or Play.Stop from server. "
                     "Assuming stream is complete");
            ret = RTMP_READ_COMPLETE;
            break;
        }

        r->m_read.dataType |= (((packet.m_packetType == RTMP_PACKET_TYPE_AUDIO) << 2) |
                               (packet.m_packetType == RTMP_PACKET_TYPE_VIDEO));

        if (packet.m_packetType == RTMP_PACKET_TYPE_VIDEO && nPacketLen <= 5)
        {
            RTMP_Log(RTMP_LOGDEBUG, "ignoring too small video packet: size: %d",
                     nPacketLen);
            ret = RTMP_READ_IGNORE;
            break;
        }
        if (packet.m_packetType == RTMP_PACKET_TYPE_AUDIO && nPacketLen <= 1)
        {
            RTMP_Log(RTMP_LOGDEBUG, "ignoring too small audio packet: size: %d",
                     nPacketLen);
            ret = RTMP_READ_IGNORE;
            break;
        }

        if (r->m_read.flags & RTMP_READ_SEEKING)
        {
            ret = RTMP_READ_IGNORE;
            break;
        }
#ifdef _DEBUG
        RTMP_Log(RTMP_LOGDEBUG, "type: %02X, size: %d, TS: %d ms, abs TS: %d",
                 packet.m_packetType, nPacketLen, packet.m_nTimeStamp,
                 packet.m_hasAbsTimestamp);
        if (packet.m_packetType == RTMP_PACKET_TYPE_VIDEO)
            RTMP_Log(RTMP_LOGDEBUG, "frametype: %02X", (*packetBody & 0xf0));
#endif

        if (r->m_read.flags & RTMP_READ_RESUME)
        {
            /* check the header if we get one */
            if (packet.m_nTimeStamp == 0)
            {
                if (r->m_read.nMetaHeaderSize > 0
                        && packet.m_packetType == RTMP_PACKET_TYPE_INFO)
                {
                    AMFObject metaObj;
                    int nRes =
                        AMF_Decode(&metaObj, packetBody, nPacketLen, FALSE);
                    if (nRes >= 0)
                    {
                        AVal metastring;
                        AMFProp_GetString(AMF_GetProp(&metaObj, NULL, 0),
                                          &metastring);

                        if (AVMATCH(&metastring, &av_onMetaData))
                        {
                            /* compare */
                            if ((r->m_read.nMetaHeaderSize != nPacketLen) ||
                                    (memcmp
                                     (r->m_read.metaHeader, packetBody,
                                      r->m_read.nMetaHeaderSize) != 0))
                            {
                                ret = RTMP_READ_ERROR;
                            }
                        }
                        AMF_Reset(&metaObj);
                        if (ret == RTMP_READ_ERROR)
                            break;
                    }
                }

                /* check first keyframe to make sure we got the right position
                 * in the stream! (the first non ignored frame)
                 */
                if (r->m_read.nInitialFrameSize > 0)
                {
                    /* video or audio data */
                    if (packet.m_packetType == r->m_read.initialFrameType
                            && r->m_read.nInitialFrameSize == nPacketLen)
                    {
                        /* we don't compare the sizes since the packet can
                         * contain several FLV packets, just make sure the
                         * first frame is our keyframe (which we are going
                         * to rewrite)
                         */
                        if (memcmp
                                (r->m_read.initialFrame, packetBody,
                                 r->m_read.nInitialFrameSize) == 0)
                        {
                            RTMP_Log(RTMP_LOGDEBUG, "Checked keyframe successfully!");
                            r->m_read.flags |= RTMP_READ_GOTKF;
                            /* ignore it! (what about audio data after it? it is
                             * handled by ignoring all 0ms frames, see below)
                             */
                            ret = RTMP_READ_IGNORE;
                            break;
                        }
                    }

                    /* hande FLV streams, even though the server resends the
                     * keyframe as an extra video packet it is also included
                     * in the first FLV stream chunk and we have to compare
                     * it and filter it out !!
                     */
                    if (packet.m_packetType == RTMP_PACKET_TYPE_FLASH_VIDEO)
                    {
                        /* basically we have to find the keyframe with the
                         * correct TS being nResumeTS
                         */
                        unsigned int pos = 0;
                        uint32_t ts = 0;

                        while (pos + 11 < nPacketLen)
                        {
                            /* size without header (11) and prevTagSize (4) */
                            uint32_t dataSize =
                                AMF_DecodeInt24(packetBody + pos + 1);
                            ts = AMF_DecodeInt24(packetBody + pos + 4);
                            ts |= (packetBody[pos + 7] << 24);

#ifdef _DEBUG
                            RTMP_Log(RTMP_LOGDEBUG,
                                     "keyframe search: FLV Packet: type %02X, dataSize: %d, timeStamp: %d ms",
                                     packetBody[pos], dataSize, ts);
#endif
                            /* ok, is it a keyframe?:
                             * well doesn't work for audio!
                             */
                            if (packetBody[pos /*6928, test 0 */ ] ==
                                    r->m_read.initialFrameType
                                    /* && (packetBody[11]&0xf0) == 0x10 */ )
                            {
                                if (ts == r->m_read.nResumeTS)
                                {
                                    RTMP_Log(RTMP_LOGDEBUG,
                                             "Found keyframe with resume-keyframe timestamp!");
                                    if (r->m_read.nInitialFrameSize != dataSize
                                            || memcmp(r->m_read.initialFrame,
                                                      packetBody + pos + 11,
                                                      r->m_read.
                                                      nInitialFrameSize) != 0)
                                    {
                                        RTMP_Log(RTMP_LOGERROR,
                                                 "FLV Stream: Keyframe doesn't match!");
                                        ret = RTMP_READ_ERROR;
                                        break;
                                    }
                                    r->m_read.flags |= RTMP_READ_GOTFLVK;

                                    /* skip this packet?
                                     * check whether skippable:
                                     */
                                    if (pos + 11 + dataSize + 4 > nPacketLen)
                                    {
                                        RTMP_Log(RTMP_LOGWARNING,
                                                 "Non skipable packet since it doesn't end with chunk, stream corrupt!");
                                        ret = RTMP_READ_ERROR;
                                        break;
                                    }
                                    packetBody += (pos + 11 + dataSize + 4);
                                    nPacketLen -= (pos + 11 + dataSize + 4);

                                    goto stopKeyframeSearch;

                                }
                                else if (r->m_read.nResumeTS < ts)
                                {
                                    /* the timestamp ts will only increase with
                                     * further packets, wait for seek
                                     */
                                    goto stopKeyframeSearch;
                                }
                            }
                            pos += (11 + dataSize + 4);
                        }
                        if (ts < r->m_read.nResumeTS)
                        {
                            RTMP_Log(RTMP_LOGERROR,
                                     "First packet does not contain keyframe, all "
                                     "timestamps are smaller than the keyframe "
                                     "timestamp; probably the resume seek failed?");
                        }
stopKeyframeSearch:
                        ;
                        if (!(r->m_read.flags & RTMP_READ_GOTFLVK))
                        {
                            RTMP_Log(RTMP_LOGERROR,
                                     "Couldn't find the seeked keyframe in this chunk!");
                            ret = RTMP_READ_IGNORE;
                            break;
                        }
                    }
                }
            }

            if (packet.m_nTimeStamp > 0
                    && (r->m_read.flags & (RTMP_READ_GOTKF|RTMP_READ_GOTFLVK)))
            {
                /* another problem is that the server can actually change from
                 * 09/08 video/audio packets to an FLV stream or vice versa and
                 * our keyframe check will prevent us from going along with the
                 * new stream if we resumed.
                 *
                 * in this case set the 'found keyframe' variables to true.
                 * We assume that if we found one keyframe somewhere and were
                 * already beyond TS > 0 we have written data to the output
                 * which means we can accept all forthcoming data including the
                 * change between 08/09 <-> FLV packets
                 */
                r->m_read.flags |= (RTMP_READ_GOTKF|RTMP_READ_GOTFLVK);
            }

            /* skip till we find our keyframe
             * (seeking might put us somewhere before it)
             */
            if (!(r->m_read.flags & RTMP_READ_GOTKF) &&
                    packet.m_packetType != RTMP_PACKET_TYPE_FLASH_VIDEO)
            {
                RTMP_Log(RTMP_LOGWARNING,
                         "Stream does not start with requested frame, ignoring data... ");
                r->m_read.nIgnoredFrameCounter++;
                if (r->m_read.nIgnoredFrameCounter > MAX_IGNORED_FRAMES)
                    ret = RTMP_READ_ERROR;	/* fatal error, couldn't continue stream */
                else
                    ret = RTMP_READ_IGNORE;
                break;
            }
            /* ok, do the same for FLV streams */
            if (!(r->m_read.flags & RTMP_READ_GOTFLVK) &&
                    packet.m_packetType == RTMP_PACKET_TYPE_FLASH_VIDEO)
            {
                RTMP_Log(RTMP_LOGWARNING,
                         "Stream does not start with requested FLV frame, ignoring data... ");
                r->m_read.nIgnoredFlvFrameCounter++;
                if (r->m_read.nIgnoredFlvFrameCounter > MAX_IGNORED_FRAMES)
                    ret = RTMP_READ_ERROR;
                else
                    ret = RTMP_READ_IGNORE;
                break;
            }

            /* we have to ignore the 0ms frames since these are the first
             * keyframes; we've got these so don't mess around with multiple
             * copies sent by the server to us! (if the keyframe is found at a
             * later position there is only one copy and it will be ignored by
             * the preceding if clause)
             */
            if (!(r->m_read.flags & RTMP_READ_NO_IGNORE) &&
                    packet.m_packetType != RTMP_PACKET_TYPE_FLASH_VIDEO)
            {
                /* exclude type RTMP_PACKET_TYPE_FLASH_VIDEO since it can
                 * contain several FLV packets
                 */
                if (packet.m_nTimeStamp == 0)
                {
                    ret = RTMP_READ_IGNORE;
                    break;
                }
                else
                {
                    /* stop ignoring packets */
                    r->m_read.flags |= RTMP_READ_NO_IGNORE;
                }
            }
        }

        /* calculate packet size and allocate slop buffer if necessary */
        size = nPacketLen +
               ((packet.m_packetType == RTMP_PACKET_TYPE_AUDIO
                 || packet.m_packetType == RTMP_PACKET_TYPE_VIDEO
                 || packet.m_packetType == RTMP_PACKET_TYPE_INFO) ? 11 : 0) +
               (packet.m_packetType != RTMP_PACKET_TYPE_FLASH_VIDEO ? 4 : 0);

        if (size + 4 > buflen)
        {
            /* the extra 4 is for the case of an FLV stream without a last
             * prevTagSize (we need extra 4 bytes to append it) */
            r->m_read.buf = malloc(size + 4);
            if (r->m_read.buf == 0)
            {
                RTMP_Log(RTMP_LOGERROR, "Couldn't allocate memory!");
                ret = RTMP_READ_ERROR;		/* fatal error */
                break;
            }
            recopy = TRUE;
            ptr = r->m_read.buf;
        }
        else
        {
            ptr = buf;
        }
        pend = ptr + size + 4;

        /* use to return timestamp of last processed packet */

        /* audio (0x08), video (0x09) or metadata (0x12) packets :
         * construct 11 byte header then add rtmp packet's data */
        if (packet.m_packetType == RTMP_PACKET_TYPE_AUDIO
                || packet.m_packetType == RTMP_PACKET_TYPE_VIDEO
                || packet.m_packetType == RTMP_PACKET_TYPE_INFO)
        {
            nTimeStamp = r->m_read.nResumeTS + packet.m_nTimeStamp;
            prevTagSize = 11 + nPacketLen;

            *ptr = packet.m_packetType;
            ptr++;
            ptr = AMF_EncodeInt24(ptr, pend, nPacketLen);

#if 0
            if(packet.m_packetType == RTMP_PACKET_TYPE_VIDEO)
            {

                /* H264 fix: */
                if((packetBody[0] & 0x0f) == 7)   /* CodecId = H264 */
                {
                    uint8_t packetType = *(packetBody+1);

                    uint32_t ts = AMF_DecodeInt24(packetBody+2); /* composition time */
                    int32_t cts = (ts+0xff800000)^0xff800000;
                    RTMP_Log(RTMP_LOGDEBUG, "cts  : %d\n", cts);

                    nTimeStamp -= cts;
                    /* get rid of the composition time */
                    CRTMP::EncodeInt24(packetBody+2, 0);
                }
                RTMP_Log(RTMP_LOGDEBUG, "VIDEO: nTimeStamp: 0x%08X (%d)\n", nTimeStamp, nTimeStamp);
            }
#endif

            ptr = AMF_EncodeInt24(ptr, pend, nTimeStamp);
            *ptr = (char)((nTimeStamp & 0xFF000000) >> 24);
            ptr++;

            /* stream id */
            ptr = AMF_EncodeInt24(ptr, pend, 0);
        }

        memcpy(ptr, packetBody, nPacketLen);
        len = nPacketLen;

        /* correct tagSize and obtain timestamp if we have an FLV stream */
        if (packet.m_packetType == RTMP_PACKET_TYPE_FLASH_VIDEO)
        {
            unsigned int pos = 0;
            int delta;

            /* grab first timestamp and see if it needs fixing */
            nTimeStamp = AMF_DecodeInt24(packetBody + 4);
            nTimeStamp |= (packetBody[7] << 24);
            delta = packet.m_nTimeStamp - nTimeStamp + r->m_read.nResumeTS;

            while (pos + 11 < nPacketLen)
            {
                /* size without header (11) and without prevTagSize (4) */
                uint32_t dataSize = AMF_DecodeInt24(packetBody + pos + 1);
                nTimeStamp = AMF_DecodeInt24(packetBody + pos + 4);
                nTimeStamp |= (packetBody[pos + 7] << 24);

                if (delta)
                {
                    nTimeStamp += delta;
                    AMF_EncodeInt24(ptr+pos+4, pend, nTimeStamp);
                    ptr[pos+7] = nTimeStamp>>24;
                }

                /* set data type */
                r->m_read.dataType |= (((*(packetBody + pos) == 0x08) << 2) |
                                       (*(packetBody + pos) == 0x09));

                if (pos + 11 + dataSize + 4 > nPacketLen)
                {
                    if (pos + 11 + dataSize > nPacketLen)
                    {
                        RTMP_Log(RTMP_LOGERROR,
                                 "Wrong data size (%u), stream corrupted, aborting!",
                                 dataSize);
                        ret = RTMP_READ_ERROR;
                        break;
                    }
                    RTMP_Log(RTMP_LOGWARNING, "No tagSize found, appending!");

                    /* we have to append a last tagSize! */
                    prevTagSize = dataSize + 11;
                    AMF_EncodeInt32(ptr + pos + 11 + dataSize, pend,
                                    prevTagSize);
                    size += 4;
                    len += 4;
                }
                else
                {
                    prevTagSize =
                        AMF_DecodeInt32(packetBody + pos + 11 + dataSize);

#ifdef _DEBUG
                    RTMP_Log(RTMP_LOGDEBUG,
                             "FLV Packet: type %02X, dataSize: %u, tagSize: %u, timeStamp: %u ms",
                             (unsigned char)packetBody[pos], dataSize, prevTagSize,
                             nTimeStamp);
#endif

                    if (prevTagSize != (dataSize + 11))
                    {
#ifdef _DEBUG
                        RTMP_Log(RTMP_LOGWARNING,
                                 "Tag and data size are not consitent, writing tag size according to dataSize+11: %d",
                                 dataSize + 11);
#endif

                        prevTagSize = dataSize + 11;
                        AMF_EncodeInt32(ptr + pos + 11 + dataSize, pend,
                                        prevTagSize);
                    }
                }

                pos += prevTagSize + 4;	/*(11+dataSize+4); */
            }
        }
        ptr += len;

        if (packet.m_packetType != RTMP_PACKET_TYPE_FLASH_VIDEO)
        {
            /* FLV tag packets contain their own prevTagSize */
            AMF_EncodeInt32(ptr, pend, prevTagSize);
        }

        /* In non-live this nTimeStamp can contain an absolute TS.
         * Update ext timestamp with this absolute offset in non-live mode
         * otherwise report the relative one
         */
        /* RTMP_Log(RTMP_LOGDEBUG, "type: %02X, size: %d, pktTS: %dms, TS: %dms, bLiveStream: %d", packet.m_packetType, nPacketLen, packet.m_nTimeStamp, nTimeStamp, r->Link.lFlags & RTMP_LF_LIVE); */
        r->m_read.timestamp = (r->Link.lFlags & RTMP_LF_LIVE) ? packet.m_nTimeStamp : nTimeStamp;

        ret = size;
        break;
    }

    if (rtnGetNextMediaPacket)
        RTMPPacket_Free(&packet);

    if (recopy)
    {
        len = ret > (int)(buflen) ? buflen : (unsigned int)(ret);
        memcpy(buf, r->m_read.buf, len);
        r->m_read.bufpos = r->m_read.buf + len;
        r->m_read.buflen = ret - len;
    }
    return ret;
}

static const char flvHeader[] = { 'F', 'L', 'V', 0x01,
                                  0x00,				/* 0x04 == audio, 0x01 == video */
                                  0x00, 0x00, 0x00, 0x09,
                                  0x00, 0x00, 0x00, 0x00
                                };

#define HEADERBUF	(128*1024)
int
RTMP_Read(RTMP *r, char *buf, int size)
{
    int nRead = 0, total = 0;

    /* can't continue */
fail:
    switch (r->m_read.status)
    {
    case RTMP_READ_EOF:
    case RTMP_READ_COMPLETE:
        return 0;
    case RTMP_READ_ERROR:  /* corrupted stream, resume failed */
        SetSockError(EINVAL);
        return -1;
    default:
        break;
    }

    /* first time thru */
    if (!(r->m_read.flags & RTMP_READ_HEADER))
    {
        if (!(r->m_read.flags & RTMP_READ_RESUME))
        {
            char *mybuf = malloc(HEADERBUF), *end = mybuf + HEADERBUF;
            int cnt = 0;
            r->m_read.buf = mybuf;
            r->m_read.buflen = HEADERBUF;

            memcpy(mybuf, flvHeader, sizeof(flvHeader));
            r->m_read.buf += sizeof(flvHeader);
            r->m_read.buflen -= sizeof(flvHeader);
            cnt += sizeof(flvHeader);

            while (r->m_read.timestamp == 0)
            {
                nRead = Read_1_Packet(r, r->m_read.buf, r->m_read.buflen);
                if (nRead < 0)
                {
                    free(mybuf);
                    r->m_read.buf = NULL;
                    r->m_read.buflen = 0;
                    r->m_read.status = nRead;
                    goto fail;
                }
                /* buffer overflow, fix buffer and give up */
                if (r->m_read.buf < mybuf || r->m_read.buf > end)
                {
                    mybuf = realloc(mybuf, cnt + nRead);
                    memcpy(mybuf+cnt, r->m_read.buf, nRead);
                    free(r->m_read.buf);
                    r->m_read.buf = mybuf+cnt+nRead;
                    break;
                }
                cnt += nRead;
                r->m_read.buf += nRead;
                r->m_read.buflen -= nRead;
                if (r->m_read.dataType == 5)
                    break;
            }
            mybuf[4] = r->m_read.dataType;
            r->m_read.buflen = r->m_read.buf - mybuf;
            r->m_read.buf = mybuf;
            r->m_read.bufpos = mybuf;
        }
        r->m_read.flags |= RTMP_READ_HEADER;
    }

    if ((r->m_read.flags & RTMP_READ_SEEKING) && r->m_read.buf)
    {
        /* drop whatever's here */
        free(r->m_read.buf);
        r->m_read.buf = NULL;
        r->m_read.bufpos = NULL;
        r->m_read.buflen = 0;
    }

    /* If there's leftover data buffered, use it up */
    if (r->m_read.buf)
    {
        nRead = r->m_read.buflen;
        if (nRead > size)
            nRead = size;
        memcpy(buf, r->m_read.bufpos, nRead);
        r->m_read.buflen -= nRead;
        if (!r->m_read.buflen)
        {
            free(r->m_read.buf);
            r->m_read.buf = NULL;
            r->m_read.bufpos = NULL;
        }
        else
        {
            r->m_read.bufpos += nRead;
        }
        buf += nRead;
        total += nRead;
        size -= nRead;
    }

    while (size > 0 && (nRead = Read_1_Packet(r, buf, size)) >= 0)
    {
        if (!nRead) continue;
        buf += nRead;
        total += nRead;
        size -= nRead;
        break;
    }
    if (nRead < 0)
        r->m_read.status = nRead;

    if (size < 0)
        total += size;
    return total;
}

int
RTMP_Write(RTMP *r, const char *buf, int size, int streamIdx)
{
    RTMPPacket *pkt = &r->m_write;
    char *enc;
    int s2 = size, ret, num;

    pkt->m_nChannel = 0x04;	/* source channel */
    pkt->m_nInfoField2 = r->Link.streams[streamIdx].id;

    while (s2)
    {
        if (!pkt->m_nBytesRead)
        {
            if (size < 11)
            {
                /* FLV pkt too small */
                return 0;
            }

            if (buf[0] == 'F' && buf[1] == 'L' && buf[2] == 'V')
            {
                buf += 13;
                s2 -= 13;
            }

            pkt->m_packetType = *buf++;
            pkt->m_nBodySize = AMF_DecodeInt24(buf);
            buf += 3;
            pkt->m_nTimeStamp = AMF_DecodeInt24(buf);
            buf += 3;
            pkt->m_nTimeStamp |= *buf++ << 24;
            buf += 3;
            s2 -= 11;

            if (((pkt->m_packetType == RTMP_PACKET_TYPE_AUDIO
                    || pkt->m_packetType == RTMP_PACKET_TYPE_VIDEO) &&
                    !pkt->m_nTimeStamp) || pkt->m_packetType == RTMP_PACKET_TYPE_INFO)
            {
                pkt->m_headerType = RTMP_PACKET_SIZE_LARGE;
            }
            else
            {
                pkt->m_headerType = RTMP_PACKET_SIZE_MEDIUM;
            }

            if (!RTMPPacket_Alloc(pkt, pkt->m_nBodySize))
            {
                RTMP_Log(RTMP_LOGDEBUG, "%s, failed to allocate packet", __FUNCTION__);
                return FALSE;
            }
            enc = pkt->m_body;
        }
        else
        {
            enc = pkt->m_body + pkt->m_nBytesRead;
        }
        num = pkt->m_nBodySize - pkt->m_nBytesRead;
        if (num > s2)
            num = s2;
        memcpy(enc, buf, num);
        pkt->m_nBytesRead += num;
        s2 -= num;
        buf += num;
        if (pkt->m_nBytesRead == pkt->m_nBodySize)
        {
            ret = RTMP_SendPacket(r, pkt, FALSE);
            RTMPPacket_Free(pkt);
            pkt->m_nBytesRead = 0;
            if (!ret)
                return -1;
            buf += 4;
            s2 -= 4;
            if (s2 < 0)
                break;
        }
    }
    return size+s2;
}