added main.cpp

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "UDPspeeder"]
+	path = UDPspeeder
+	url = https://github.com/wangyu-/UDPspeeder.git

UDPspeeder

@@ -0,0 +1 @@
+Subproject commit 203604e1b5ca3b989382b3f188b7c6d9014fe662

main.cpp

@@ -0,0 +1,716 @@
+/*
+ * tun.cpp
+ *
+ *  Created on: Oct 26, 2017
+ *      Author: root
+ */
+
+#include "common.h"
+#include "log.h"
+#include "misc.h"
+using namespace std;
+
+
+int get_tun_fd(char * dev_name)
+{
+	int tun_fd=open("/dev/net/tun",O_RDWR);
+
+	if(tun_fd <0)
+	{
+		mylog(log_fatal,"open /dev/net/tun failed");
+		myexit(-1);
+	}
+	struct ifreq ifr;
+	memset(&ifr, 0, sizeof(ifr));
+	ifr.ifr_flags = IFF_TUN|IFF_NO_PI;
+
+	strncpy(ifr.ifr_name, dev_name, IFNAMSIZ);
+
+	if(ioctl(tun_fd, TUNSETIFF, (void *)&ifr) != 0)
+	{
+		mylog(log_fatal,"open /dev/net/tun failed");
+		myexit(-1);
+	}
+	return tun_fd;
+}
+
+int set_if(char *if_name,u32_t local_ip,u32_t remote_ip,int mtu)
+{
+	//printf("i m here1\n");
+	struct ifreq ifr;
+	struct sockaddr_in sai;
+	memset(&ifr,0,sizeof(ifr));
+	memset(&sai, 0, sizeof(struct sockaddr));
+
+	int sockfd = socket(AF_INET, SOCK_DGRAM, 0);
+	strncpy(ifr.ifr_name, if_name, IFNAMSIZ);
+
+    sai.sin_family = AF_INET;
+    sai.sin_port = 0;
+
+    sai.sin_addr.s_addr = local_ip;
+    memcpy(&ifr.ifr_addr,&sai, sizeof(struct sockaddr));
+    assert(ioctl(sockfd, SIOCSIFADDR, &ifr)==0); //set source ip
+
+    sai.sin_addr.s_addr = remote_ip;
+    memcpy(&ifr.ifr_addr,&sai, sizeof(struct sockaddr));
+    assert(ioctl(sockfd, SIOCSIFDSTADDR, &ifr)==0);//set dest ip
+
+    ifr.ifr_mtu=mtu;
+    assert(ioctl(sockfd, SIOCSIFMTU, &ifr)==0);//set mtu
+
+
+    assert(ioctl(sockfd, SIOCGIFFLAGS, &ifr)==0);
+   // ifr.ifr_flags |= ( IFF_UP|IFF_POINTOPOINT|IFF_RUNNING|IFF_NOARP|IFF_MULTICAST );
+    ifr.ifr_flags = ( IFF_UP|IFF_POINTOPOINT|IFF_RUNNING|IFF_NOARP|IFF_MULTICAST );//set interface flags
+    assert(ioctl(sockfd, SIOCSIFFLAGS, &ifr)==0);
+
+    //printf("i m here2\n");
+	return 0;
+}
+
+const char header_normal=1;
+const char header_new_connect=2;
+const char header_reject=3;
+
+int put_header(char header,char * data,int &len)
+{
+	assert(len>=0);
+	data[len]=header;
+	len+=1;
+	return 0;
+}
+int get_header(char &header,char * data,int &len)
+{
+	assert(len>=0);
+	if(len<1) return -1;
+	len-=1;
+	header=data[len];
+
+	return 0;
+}
+int from_normal_to_fec2(conn_info_t & conn_info,dest_t &dest,char * data,int len,char header)
+{
+	int  out_n;char **out_arr;int *out_len;my_time_t *out_delay;
+
+	from_normal_to_fec(conn_info,data,len,out_n,out_arr,out_len,out_delay);
+
+	for(int i=0;i<out_n;i++)
+	{
+
+		char tmp_buf[buf_len];
+		int tmp_len=out_len[i];
+		memcpy(tmp_buf,out_arr[i],out_len[i]);
+		put_header(header,tmp_buf,tmp_len);
+		delay_send(out_delay[i],dest,tmp_buf,tmp_len);//this is slow but safer.just use this one
+
+		//put_header(header,out_arr[i],out_len[i]);//modify in place
+		//delay_send(out_delay[i],dest,out_arr[i],out_len[i]);//warning this is currently okay,but if you modified fec encoder,you  may have to use the above code
+	}
+	return 0;
+}
+
+int from_fec_to_normal2(conn_info_t & conn_info,dest_t &dest,char * data,int len)
+{
+	int  out_n;char **out_arr;int *out_len;my_time_t *out_delay;
+
+	from_fec_to_normal(conn_info,data,len,out_n,out_arr,out_len,out_delay);
+
+	for(int i=0;i<out_n;i++)
+	{
+		delay_send(out_delay[i],dest,out_arr[i],out_len[i]);
+	}
+
+	return 0;
+}
+
+int tun_dev_client_event_loop()
+{
+	char data[buf_len];
+	int len;
+	int i,j,k,ret;
+	int epoll_fd,tun_fd;
+
+	int remote_fd;
+	fd64_t remote_fd64;
+
+	tun_fd=get_tun_fd(tun_dev);
+	assert(tun_fd>0);
+
+	assert(new_connected_socket(remote_fd,remote_ip_uint32,remote_port)==0);
+	remote_fd64=fd_manager.create(remote_fd);
+
+	assert(set_if(tun_dev,htonl((ntohl(sub_net_uint32)&0xFFFFFF00)|2),htonl((ntohl(sub_net_uint32)&0xFFFFFF00 )|1),g_fec_mtu)==0);
+
+	epoll_fd = epoll_create1(0);
+	assert(epoll_fd>0);
+
+	const int max_events = 4096;
+	struct epoll_event ev, events[max_events];
+	if (epoll_fd < 0) {
+		mylog(log_fatal,"epoll return %d\n", epoll_fd);
+		myexit(-1);
+	}
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = remote_fd64;
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, remote_fd, &ev);
+	if (ret!=0) {
+		mylog(log_fatal,"add  remote_fd64 error\n");
+		myexit(-1);
+	}
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = tun_fd;
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, tun_fd, &ev);
+	if (ret!=0) {
+		mylog(log_fatal,"add  tun_fd error\n");
+		myexit(-1);
+	}
+
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = delay_manager.get_timer_fd();
+
+	mylog(log_debug,"delay_manager.get_timer_fd()=%d\n",delay_manager.get_timer_fd());
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, delay_manager.get_timer_fd(), &ev);
+	if (ret!= 0) {
+		mylog(log_fatal,"add delay_manager.get_timer_fd() error\n");
+		myexit(-1);
+	}
+
+
+    conn_info_t *conn_info_p=new conn_info_t;
+    conn_info_t &conn_info=*conn_info_p;  //huge size of conn_info,do not allocate on stack
+
+	u64_t tmp_timer_fd64=conn_info.fec_encode_manager.get_timer_fd64();
+	ev.events = EPOLLIN;
+	ev.data.u64 = tmp_timer_fd64;
+
+	mylog(log_debug,"conn_info.fec_encode_manager.get_timer_fd64()=%llu\n",conn_info.fec_encode_manager.get_timer_fd64());
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd_manager.to_fd(tmp_timer_fd64), &ev);
+	if (ret!= 0) {
+		mylog(log_fatal,"add fec_encode_manager.get_timer_fd64() error\n");
+		myexit(-1);
+	}
+
+	conn_info.timer.add_fd_to_epoll(epoll_fd);
+	conn_info.timer.set_timer_repeat_us(timer_interval*1000);
+
+
+
+
+
+	int fifo_fd=-1;
+
+	if(fifo_file[0]!=0)
+	{
+		fifo_fd=create_fifo(fifo_file);
+		ev.events = EPOLLIN;
+		ev.data.u64 = fifo_fd;
+
+		ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fifo_fd, &ev);
+		if (ret!= 0) {
+			mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
+			myexit(-1);
+		}
+		mylog(log_info,"fifo_file=%s\n",fifo_file);
+	}
+
+
+	dest_t udp_dest;
+	udp_dest.cook=1;
+	udp_dest.type=type_fd64;
+	udp_dest.inner.fd64=remote_fd64;
+
+	dest_t tun_dest;
+	tun_dest.type=type_write_fd;
+	tun_dest.inner.fd=tun_fd;
+
+	int got_feed_back=0;
+
+	while(1)////////////////////////
+	{
+
+		if(about_to_exit) myexit(0);
+
+		int nfds = epoll_wait(epoll_fd, events, max_events, 180 * 1000);
+		if (nfds < 0) {  //allow zero
+			if(errno==EINTR  )
+			{
+				mylog(log_info,"epoll interrupted by signal\n");
+				myexit(0);
+			}
+			else
+			{
+				mylog(log_fatal,"epoll_wait return %d\n", nfds);
+				myexit(-1);
+			}
+		}
+		int idx;
+		for (idx = 0; idx < nfds; ++idx)
+		{
+			if(events[idx].data.u64==(u64_t)conn_info.timer.get_timer_fd())
+			{
+				uint64_t value;
+				read(conn_info.timer.get_timer_fd(), &value, 8);
+				mylog(log_trace,"events[idx].data.u64==(u64_t)conn_info.timer.get_timer_fd()\n");
+				conn_info.stat.report_as_client();
+			}
+
+			else if(events[idx].data.u64==conn_info.fec_encode_manager.get_timer_fd64())
+			{
+				fd64_t fd64=events[idx].data.u64;
+				mylog(log_trace,"events[idx].data.u64 == conn_info.fec_encode_manager.get_timer_fd64()\n");
+
+				uint64_t value;
+				if(!fd_manager.exist(fd64))   //fd64 has been closed
+				{
+					mylog(log_trace,"!fd_manager.exist(fd64)");
+					continue;
+				}
+				if((ret=read(fd_manager.to_fd(fd64), &value, 8))!=8)
+				{
+					mylog(log_trace,"(ret=read(fd_manager.to_fd(fd64), &value, 8))!=8,ret=%d\n",ret);
+					continue;
+				}
+				if(value==0)
+				{
+					mylog(log_debug,"value==0\n");
+					continue;
+				}
+				assert(value==1);
+
+				char header=(got_feed_back==0?header_new_connect:header_normal);
+				from_normal_to_fec2(conn_info,udp_dest,0,0,header);
+			}
+			else if(events[idx].data.u64==(u64_t)tun_fd)
+			{
+				len=read(tun_fd,data,max_data_len);
+
+				if(len<0)
+				{
+					mylog(log_warn,"read from tun_fd return %d,errno=%s\n",len,strerror(errno));
+					continue;
+				}
+				if(len>=20)
+				{
+					u32_t dest_ip=htonl(read_u32(data+16));
+					if(  ( ntohl(sub_net_uint32)&0xFFFFFF00 ) !=  ( ntohl (dest_ip) &0xFFFFFF00) )
+					{
+						string sub=my_ntoa(dest_ip);
+						string dst=my_ntoa( htonl( ntohl (dest_ip) &0xFFFFFF00)   );
+						mylog(log_warn,"packet's dest ip [%s] not in subnet [%s],dropped\n", sub.c_str(), dst.c_str());
+						continue;
+					}
+				}
+
+				mylog(log_trace,"Received packet from tun,len: %d\n",len);
+
+				char header=(got_feed_back==0?header_new_connect:header_normal);
+				from_normal_to_fec2(conn_info,udp_dest,data,len,header);
+
+			}
+			else if(events[idx].data.u64==(u64_t)remote_fd64)
+			{
+				fd64_t fd64=events[idx].data.u64;
+				int fd=fd_manager.to_fd(fd64);
+
+				len=recv(fd,data,max_data_len,0);
+
+				if(len<0)
+				{
+					mylog(log_warn,"recv return %d,errno=%s\n",len,strerror(errno));
+					continue;
+				}
+
+				if(de_cook(data,len)<0)
+				{
+					mylog(log_warn,"de_cook(data,len)failed \n");
+					continue;
+
+				}
+
+				char header=0;
+				if(get_header(header,data,len)!=0)
+				{
+					mylog(log_warn,"get_header failed\n");
+					continue;
+				}
+
+				if(header==header_reject)
+				{
+					mylog(log_fatal,"server restarted or switched to handle another client,exited\n");
+					myexit(-1);
+					continue;
+				}
+				else if(header==header_normal)
+				{
+					if(got_feed_back==0)
+						mylog(log_info,"connection accepted by server\n");
+					got_feed_back=1;
+				}
+				else
+				{
+					mylog(log_warn,"invalid header %d %d\n",int(header),len);
+					continue;
+				}
+
+				mylog(log_trace,"Received packet from udp,len: %d\n",len);
+
+				from_fec_to_normal2(conn_info,tun_dest,data,len);
+
+			}
+		    else if (events[idx].data.u64 == (u64_t)delay_manager.get_timer_fd())
+		    {
+				uint64_t value;
+				read(delay_manager.get_timer_fd(), &value, 8);
+				mylog(log_trace,"events[idx].data.u64 == (u64_t)delay_manager.get_timer_fd()\n");
+
+			}
+			else if (events[idx].data.u64 == (u64_t)fifo_fd)
+			{
+				char buf[buf_len];
+				int len=read (fifo_fd, buf, sizeof (buf));
+				if(len<0)
+				{
+					mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
+					continue;
+				}
+				buf[len]=0;
+				handle_command(buf);
+			}
+			else
+			{
+				assert(0==1);
+			}
+		}
+		delay_manager.check();
+	}
+
+
+	return 0;
+}
+
+int tun_dev_server_event_loop()
+{
+	char data[buf_len];
+	int len;
+	int i,j,k,ret;
+	int epoll_fd,tun_fd;
+	int local_listen_fd;
+
+	tun_fd=get_tun_fd(tun_dev);
+	assert(tun_fd>0);
+
+	assert(new_listen_socket(local_listen_fd,local_ip_uint32,local_port)==0);
+	assert(set_if(tun_dev,htonl((ntohl(sub_net_uint32)&0xFFFFFF00)|1),htonl((ntohl(sub_net_uint32)&0xFFFFFF00 )|2),g_fec_mtu)==0);
+
+	epoll_fd = epoll_create1(0);
+	assert(epoll_fd>0);
+
+	const int max_events = 4096;
+	struct epoll_event ev, events[max_events];
+	if (epoll_fd < 0) {
+		mylog(log_fatal,"epoll return %d\n", epoll_fd);
+		myexit(-1);
+	}
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = local_listen_fd;
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, local_listen_fd, &ev);
+	if (ret!=0) {
+		mylog(log_fatal,"add  udp_listen_fd error\n");
+		myexit(-1);
+	}
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = tun_fd;
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, tun_fd, &ev);
+	if (ret!=0) {
+		mylog(log_fatal,"add  tun_fd error\n");
+		myexit(-1);
+	}
+
+	ev.events = EPOLLIN;
+	ev.data.u64 = delay_manager.get_timer_fd();
+
+	mylog(log_debug,"delay_manager.get_timer_fd()=%d\n",delay_manager.get_timer_fd());
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, delay_manager.get_timer_fd(), &ev);
+	if (ret!= 0) {
+		mylog(log_fatal,"add delay_manager.get_timer_fd() error\n");
+		myexit(-1);
+	}
+
+
+    conn_info_t *conn_info_p=new conn_info_t;
+    conn_info_t &conn_info=*conn_info_p;  //huge size of conn_info,do not allocate on stack
+
+	u64_t tmp_timer_fd64=conn_info.fec_encode_manager.get_timer_fd64();
+	ev.events = EPOLLIN;
+	ev.data.u64 = tmp_timer_fd64;
+
+	mylog(log_debug,"conn_info.fec_encode_manager.get_timer_fd64()=%llu\n",conn_info.fec_encode_manager.get_timer_fd64());
+	ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fd_manager.to_fd(tmp_timer_fd64), &ev);
+	if (ret!= 0) {
+		mylog(log_fatal,"add fec_encode_manager.get_timer_fd64() error\n");
+		myexit(-1);
+	}
+
+	conn_info.timer.add_fd_to_epoll(epoll_fd);
+	conn_info.timer.set_timer_repeat_us(timer_interval*1000);
+
+
+
+
+	int fifo_fd=-1;
+
+	if(fifo_file[0]!=0)
+	{
+		fifo_fd=create_fifo(fifo_file);
+		ev.events = EPOLLIN;
+		ev.data.u64 = fifo_fd;
+
+		ret = epoll_ctl(epoll_fd, EPOLL_CTL_ADD, fifo_fd, &ev);
+		if (ret!= 0) {
+			mylog(log_fatal,"add fifo_fd to epoll error %s\n",strerror(errno));
+			myexit(-1);
+		}
+		mylog(log_info,"fifo_file=%s\n",fifo_file);
+	}
+
+	dest_t udp_dest;
+	udp_dest.cook=1;
+	udp_dest.type=type_fd_ip_port;
+
+	udp_dest.inner.fd_ip_port.fd=local_listen_fd;
+	udp_dest.inner.fd_ip_port.ip_port.ip=0;
+	udp_dest.inner.fd_ip_port.ip_port.port=0;
+
+	dest_t tun_dest;
+	tun_dest.type=type_write_fd;
+	tun_dest.inner.fd=tun_fd;
+
+	while(1)////////////////////////
+	{
+
+		if(about_to_exit) myexit(0);
+
+		int nfds = epoll_wait(epoll_fd, events, max_events, 180 * 1000);
+		if (nfds < 0) {  //allow zero
+			if(errno==EINTR  )
+			{
+				mylog(log_info,"epoll interrupted by signal\n");
+				myexit(0);
+			}
+			else
+			{
+				mylog(log_fatal,"epoll_wait return %d\n", nfds);
+				myexit(-1);
+			}
+		}
+		int idx;
+		for (idx = 0; idx < nfds; ++idx)
+		{
+			if(events[idx].data.u64==(u64_t)conn_info.timer.get_timer_fd())
+			{
+				uint64_t value;
+				read(conn_info.timer.get_timer_fd(), &value, 8);
+
+				if(udp_dest.inner.fd64_ip_port.ip_port.to_u64()==0)
+				{
+					continue;
+				}
+				conn_info.stat.report_as_server(udp_dest.inner.fd_ip_port.ip_port);
+			}
+			else if(events[idx].data.u64==conn_info.fec_encode_manager.get_timer_fd64())
+			{
+				assert(udp_dest.inner.fd64_ip_port.ip_port.to_u64()!=0);
+				mylog(log_trace,"events[idx].data.u64 == conn_info.fec_encode_manager.get_timer_fd64()\n");
+				uint64_t fd64=events[idx].data.u64;
+				//mylog(log_info,"timer!!!\n");
+				uint64_t value;
+				if(!fd_manager.exist(fd64))   //fd64 has been closed
+				{
+					mylog(log_trace,"!fd_manager.exist(fd64)");
+					continue;
+				}
+				if((ret=read(fd_manager.to_fd(fd64), &value, 8))!=8)
+				{
+					mylog(log_trace,"(ret=read(fd_manager.to_fd(fd64), &value, 8))!=8,ret=%d\n",ret);
+					continue;
+				}
+				if(value==0)
+				{
+					mylog(log_debug,"value==0\n");
+					continue;
+				}
+				assert(value==1);
+
+				from_normal_to_fec2(conn_info,udp_dest,0,0,header_normal);
+			}
+			else if(events[idx].data.u64==(u64_t)local_listen_fd)
+			{
+				struct sockaddr_in udp_new_addr_in={0};
+				socklen_t udp_new_addr_len = sizeof(sockaddr_in);
+				if ((len = recvfrom(local_listen_fd, data, max_data_len, 0,
+						(struct sockaddr *) &udp_new_addr_in, &udp_new_addr_len)) < 0) {
+					mylog(log_error,"recv_from error,this shouldnt happen,err=%s,but we can try to continue\n",strerror(errno));
+					continue;
+					//myexit(1);
+				};
+
+				if(de_cook(data,len)<0)
+				{
+					mylog(log_warn,"de_cook(data,len)failed \n");
+					continue;
+
+				}
+
+				char header=0;
+				if(get_header(header,data,len)!=0)
+				{
+					mylog(log_warn,"get_header failed\n");
+					continue;
+				}
+
+				if((udp_dest.inner.fd_ip_port.ip_port.ip==udp_new_addr_in.sin_addr.s_addr) && (udp_dest.inner.fd_ip_port.ip_port.port==ntohs(udp_new_addr_in.sin_port)))
+				{
+					if(header!=header_new_connect&& header!=header_normal)
+					{
+						mylog(log_warn,"invalid header\n");
+						continue;
+					}
+				}
+				else
+				{
+					if(header==header_new_connect)
+					{
+						mylog(log_info,"new connection from %s:%d \n", inet_ntoa(udp_new_addr_in.sin_addr),
+												ntohs(udp_new_addr_in.sin_port));
+						udp_dest.inner.fd_ip_port.ip_port.ip=udp_new_addr_in.sin_addr.s_addr;
+						udp_dest.inner.fd_ip_port.ip_port.port=ntohs(udp_new_addr_in.sin_port);
+						conn_info.fec_decode_manager.clear();
+						conn_info.fec_encode_manager.clear();
+						memset(&conn_info.stat,0,sizeof(conn_info.stat));
+
+					}
+					else if(header==header_normal)
+					{
+						mylog(log_info,"rejected connection from %s:%d\n", inet_ntoa(udp_new_addr_in.sin_addr),ntohs(udp_new_addr_in.sin_port));
+
+
+						len=1;
+						data[0]=header_reject;
+						do_cook(data,len);
+
+
+						dest_t tmp_dest;
+						tmp_dest.type=type_fd_ip_port;
+
+						tmp_dest.inner.fd_ip_port.fd=local_listen_fd;
+						tmp_dest.inner.fd_ip_port.ip_port.ip=udp_new_addr_in.sin_addr.s_addr;
+						tmp_dest.inner.fd_ip_port.ip_port.port=ntohs(udp_new_addr_in.sin_port);
+
+						delay_manager.add(0,tmp_dest,data,len);;
+						continue;
+					}
+					else
+					{
+						mylog(log_warn,"invalid header\n");
+					}
+				}
+
+				mylog(log_trace,"Received packet from %s:%d,len: %d\n", inet_ntoa(udp_new_addr_in.sin_addr),
+						ntohs(udp_new_addr_in.sin_port),len);
+
+				from_fec_to_normal2(conn_info,tun_dest,data,len);
+
+			}
+			else if(events[idx].data.u64==(u64_t)tun_fd)
+			{
+				len=read(tun_fd,data,max_data_len);
+				if(len<0)
+				{
+					mylog(log_warn,"read from tun_fd return %d,errno=%s\n",len,strerror(errno));
+					continue;
+				}
+
+				mylog(log_trace,"Received packet from tun,len: %d\n",len);
+
+				if(udp_dest.inner.fd64_ip_port.ip_port.to_u64()==0)
+				{
+					mylog(log_debug,"received packet from tun,but there is no client yet,dropped packet\n");
+					continue;
+				}
+
+				from_normal_to_fec2(conn_info,udp_dest,data,len,header_normal);
+
+			}
+		    else if (events[idx].data.u64 == (u64_t)delay_manager.get_timer_fd())
+		    {
+				uint64_t value;
+				read(delay_manager.get_timer_fd(), &value, 8);
+				mylog(log_trace,"events[idx].data.u64 == (u64_t)delay_manager.get_timer_fd()\n");
+			}
+			else if (events[idx].data.u64 == (u64_t)fifo_fd)
+			{
+				char buf[buf_len];
+				int len=read (fifo_fd, buf, sizeof (buf));
+				if(len<0)
+				{
+					mylog(log_warn,"fifo read failed len=%d,errno=%s\n",len,strerror(errno));
+					continue;
+				}
+				buf[len]=0;
+				handle_command(buf);
+			}
+			else
+			{
+				assert(0==1);
+			}
+		}
+		delay_manager.check();
+	}
+
+
+	return 0;
+}
+
+
+
+int main(int argc, char *argv[])
+{
+	//working_mode=tunnel_mode;
+
+	assert(sizeof(u64_t)==8);
+	assert(sizeof(i64_t)==8);
+	assert(sizeof(u32_t)==4);
+	assert(sizeof(i32_t)==4);
+	assert(sizeof(u16_t)==2);
+	assert(sizeof(i16_t)==2);
+	dup2(1, 2);		//redirect stderr to stdout
+	int i, j, k;
+	process_arg(argc,argv);
+
+	delay_manager.set_capacity(delay_capacity);
+	local_ip_uint32=inet_addr(local_ip);
+	remote_ip_uint32=inet_addr(remote_ip);
+	sub_net_uint32=inet_addr(sub_net);
+
+	if(strlen(tun_dev)==0)
+	{
+		sprintf(tun_dev,"tun%u",get_true_random_number()%1000);
+	}
+
+	if(client_or_server==client_mode)
+	{
+		tun_dev_client_event_loop();
+	}
+	else
+	{
+		tun_dev_server_event_loop();
+	}
+
+	return 0;
+}