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@@ -1,7 +1,7 @@
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/*************************************************************************
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-*
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-* Copyright (C) 2018 Ruilin Peng (Nick) <[email protected]>.
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-*
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+ *
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+ * Copyright (C) 2018 Ruilin Peng (Nick) <[email protected]>.
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+ *
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* smartdns is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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@@ -16,31 +16,74 @@
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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-#include "fast_ping.h"
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+#include "atomic.h"
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+#include "conf.h"
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#include "dns_client.h"
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#include "dns_server.h"
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+#include "fast_ping.h"
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#include "hashtable.h"
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#include "list.h"
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#include "tlog.h"
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-#include "conf.h"
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-#include "atomic.h"
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+#include "util.h"
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+#include <errno.h>
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+#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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+#include <string.h>
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-atomic_t r = ATOMIC_INIT(0);
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+#define RESOLVE_FILE "/etc/resolv.conf"
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+#define MAX_LINE_LEN 1024
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+#define MAX_KEY_LEN 64
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-void print_result(struct ping_host_struct *ping_host, const char *host, FAST_PING_RESULT result, struct sockaddr *addr, socklen_t addr_len, int seqno,
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- struct timeval *tv, void *userptr)
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+int smartdns_load_from_resolv(void)
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{
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- atomic_inc(&r);
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- #if 0
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- if (result == PING_RESULT_RESPONSE) {
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- double rtt = tv->tv_sec * 1000.0 + tv->tv_usec / 1000.0;
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- printf("from %15s: seq=%d time=%.3f\n", host, seqno, rtt);
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- } else if (result == PING_RESULT_TIMEOUT) {
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- printf("from %15s: seq=%d timeout\n", host, seqno);
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+ FILE *fp = NULL;
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+ char line[MAX_LINE_LEN];
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+ char key[MAX_KEY_LEN];
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+ char value[MAX_LINE_LEN];
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+ char ns_ip[DNS_MAX_IPLEN];
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+ int port = PORT_NOT_DEFINED;
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+ int ret = -1;
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+
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+ int filed_num = 0;
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+ int line_num = 0;
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+
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+ fp = fopen(RESOLVE_FILE, "r");
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+ if (fp == NULL) {
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+ tlog(TLOG_ERROR, "open %s failed, %s", RESOLVE_FILE, strerror(errno));
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+ return -1;
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}
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- #endif
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+
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+ while (fgets(line, MAX_LINE_LEN, fp)) {
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+ line_num++;
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+ filed_num = sscanf(line, "%63s %1023[^\r\n]s", key, value);
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+
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+ if (filed_num != 2) {
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+ continue;
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+ }
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+
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+ if (strncmp(key, "nameserver", MAX_KEY_LEN) != 0) {
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+ continue;
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+ }
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+
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+ if (parse_ip(value, ns_ip, &port) != 0) {
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+ continue;
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+ }
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+
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+ if (port == PORT_NOT_DEFINED) {
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+ port = DEFAULT_DNS_PORT;
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+ }
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+
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+ strncpy(dns_conf_servers[dns_conf_server_num].server, ns_ip, DNS_MAX_IPLEN);
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+ dns_conf_servers[dns_conf_server_num].port = port;
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+ dns_conf_servers[dns_conf_server_num].type = DNS_SERVER_UDP;
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+ dns_conf_server_num++;
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+ ret = 0;
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+ }
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+
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+ fclose(fp);
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+
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+ return ret;
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}
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int smartdns_add_servers(void)
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@@ -53,227 +96,78 @@ int smartdns_add_servers(void)
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tlog(TLOG_ERROR, "add server failed, %s:%d", dns_conf_servers[i].server, dns_conf_servers[i].port);
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return -1;
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}
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- }
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+ }
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return 0;
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}
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int smartdns_init()
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{
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- int ret;
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+ int ret;
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if (load_conf("smartdns.conf") != 0) {
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fprintf(stderr, "load config failed.");
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- goto errout;
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}
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ret = tlog_init(".", "smartdns.log", 1024 * 1024, 8, 1, 0, 0);
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- if (ret != 0) {
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+ if (ret != 0) {
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tlog(TLOG_ERROR, "start tlog failed.\n");
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goto errout;
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}
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tlog_setlogscreen(1);
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- //tlog_setlevel(TLOG_ERROR);
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+ tlog_setlevel(TLOG_DEBUG);
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+
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+ if (dns_conf_server_num <= 0) {
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+ if (smartdns_load_from_resolv() != 0) {
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+ tlog(TLOG_ERROR, "load dns from resolv failed.");
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+ goto errout;
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+ }
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+ }
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ret = fast_ping_init();
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- if (ret != 0) {
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- tlog(TLOG_ERROR, "start ping failed.\n");
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- goto errout;
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- }
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-
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- ret = dns_server_init();
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- if (ret != 0) {
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- tlog(TLOG_ERROR, "start dns server failed.\n");
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- goto errout;
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- }
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-
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- ret = dns_client_init();
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- if (ret != 0) {
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- tlog(TLOG_ERROR, "start dns client failed.\n");
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- goto errout;
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- }
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+ if (ret != 0) {
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+ tlog(TLOG_ERROR, "start ping failed.\n");
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+ goto errout;
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+ }
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+
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+ ret = dns_server_init();
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+ if (ret != 0) {
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+ tlog(TLOG_ERROR, "start dns server failed.\n");
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+ goto errout;
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+ }
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+
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+ ret = dns_client_init();
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+ if (ret != 0) {
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+ tlog(TLOG_ERROR, "start dns client failed.\n");
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+ goto errout;
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+ }
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ret = smartdns_add_servers();
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- if (ret != 0) {
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+ if (ret != 0) {
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tlog(TLOG_ERROR, "add servers failed.");
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goto errout;
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}
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- /*
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- dns_add_server("192.168.1.1", 53, DNS_SERVER_UDP);
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- dns_add_server("114.114.114.114", 53, DNS_SERVER_UDP);
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- dns_add_server("123.207.137.88", 53, DNS_SERVER_UDP);
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- dns_add_server("193.112.15.186", 53, DNS_SERVER_UDP);
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- dns_add_server("202.141.178.13", 5353, DNS_SERVER_UDP);
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- dns_add_server("208.67.222.222", 5353, DNS_SERVER_UDP);
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- dns_add_server("77.88.8.8", 53, DNS_SERVER_UDP);
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- dns_add_server("202.141.162.123", 53, DNS_SERVER_UDP);
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- dns_add_server("101.132.183.99", 53, DNS_SERVER_UDP);
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- */
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- // int i = 0;
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- // for(i = 0; i < 10; i++)
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- // {
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- // fast_ping_start("205.185.208.142", 1, 1000, print_result, NULL);
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- // fast_ping_start("205.185.208.142", 1, 1000, print_result, NULL);
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- // fast_ping_start("205.185.208.142", 1, 1000, print_result, NULL);
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- // fast_ping_start("205.185.208.142", 1, 1000, print_result, NULL);
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- // fast_ping_start("192.168.1.1", 1, 1000, print_result, NULL);
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- // fast_ping_start("192.168.1.1", 1, 1000, print_result, NULL);
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- // fast_ping_start("192.168.1.1", 1, 1000, print_result, NULL);
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- // fast_ping_start("192.168.1.1", 1, 1000, print_result, NULL);
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- // fast_ping_start("123.207.137.88", 1, 1000, print_result, NULL);
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- // fast_ping_start("123.207.137.88", 1, 1000, print_result, NULL);
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- // fast_ping_start("123.207.137.88", 1, 1000, print_result, NULL);
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- // fast_ping_start("123.207.137.88", 1, 1000, print_result, NULL);
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- // }
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-
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- // sleep(2);
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- // printf("i = %d, n = %d\n", i, atomic_read(&r));
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-
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return 0;
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errout:
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- return -1;
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+ return -1;
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}
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int smartdns_run()
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{
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- return dns_server_run();
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+ return dns_server_run();
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}
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void smartdns_exit()
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{
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- fast_ping_exit();
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- dns_client_exit();
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- dns_server_exit();
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+ fast_ping_exit();
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+ dns_client_exit();
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+ dns_server_exit();
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tlog_exit();
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}
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-struct data {
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- struct list_head list;
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- int n;
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-};
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-
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-void list_test()
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-{
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- struct list_head head;
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- struct list_head *iter;
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- int i = 0;
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-
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- INIT_LIST_HEAD(&head);
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-
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- for (i = 0; i < 10; i++) {
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- struct data *h = malloc(sizeof(struct data));
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- h->n = i;
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- list_add(&h->list, &head);
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- }
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-
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- list_for_each(iter, &head)
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- {
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- struct data *d = list_entry(iter, struct data, list);
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- printf("%d\n", d->n);
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- }
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-}
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-
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-struct data_hash {
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- struct hlist_node node;
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- int n;
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- char str[32];
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-};
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-
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-int hash_test()
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-{
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- DEFINE_HASHTABLE(ht, 7);
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- struct data_hash *temp;
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- struct data_hash *obj;
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- int i;
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- int key;
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-
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- for (i = 11; i < 17; i++) {
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- temp = malloc(sizeof(struct data_hash));
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- temp->n = i * i;
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- hash_add(ht, &temp->node, temp->n);
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- }
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-
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- for (i = 11; i < 17; i++) {
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- key = i * i;
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- hash_for_each_possible(ht, obj, node, key)
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- {
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- printf("value: %d\n", obj->n);
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- };
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- }
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-
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- return 0;
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-}
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-
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-int hash_string_test()
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-{
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- DEFINE_HASHTABLE(ht, 7);
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- struct data_hash *temp;
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- struct data_hash *obj;
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- int i;
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- int key;
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-
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- for (i = 0; i < 10; i++) {
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- temp = malloc(sizeof(struct data_hash));
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- sprintf(temp->str, "%d", i);
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- hash_add(ht, &temp->node, hash_string(temp->str));
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- }
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-
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- for (i = 0; i < 10; i++) {
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- char key_str[32];
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- sprintf(key_str, "%d", i);
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- key = hash_string(key_str);
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- hash_for_each_possible(ht, obj, node, key)
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- {
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- printf("i = %d value: %s\n", i, obj->str);
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- };
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- }
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-
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- return 0;
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-}
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-
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-#if 0
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-struct data_rbtree {
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- struct rb_node list;
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- int value;
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-};
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-
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-int rbtree_test()
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-{
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- struct rb_root root;
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- struct rb_node *n;
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- RB_EMPTY_ROOT(&root);
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- int i;
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-
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- for (i = 0; i < 10; i++)
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- {
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- struct data_rbtree *r = malloc(sizeof(struct data_rbtree));
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- r->value = i;
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- rb_insert(&r->list, &root);
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- }
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-
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- n = rb_first(&root);
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- int num = 5;
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- while (n) {
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- struct data_rbtree *r = container_of(n, struct data_rbtree, list);
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- if (r->value < num) {
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- n = n->rb_left;
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- } else if (r->value > num) {
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- n = n->rb_right;
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- } else {
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- printf("n = %d\n", r->value);
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- break;
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- }
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- }
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-
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- return 0;
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-}
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-#endif
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-
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-#include <signal.h>
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-
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void sig_handle(int sig)
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{
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tlog(TLOG_ERROR, "process exit.\n");
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@@ -282,18 +176,18 @@ void sig_handle(int sig)
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int main(int argc, char *argv[])
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{
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- int ret;
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+ int ret;
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atexit(smartdns_exit);
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signal(SIGABRT, sig_handle);
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ret = smartdns_init();
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- if (ret != 0) {
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- goto errout;
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- }
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+ if (ret != 0) {
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+ goto errout;
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+ }
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- return smartdns_run();
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+ return smartdns_run();
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errout:
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- return 1;
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+ return 1;
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}
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Nick Peng