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mpv/stream/tcp.c

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/*
* Network layer for MPlayer
*
* Copyright (C) 2001 Bertrand BAUDET <bertrand_baudet@yahoo.com>
*
* This file is part of MPlayer.
*
* MPlayer is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* MPlayer 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 General Public License along
* with MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <ctype.h>
#include <fcntl.h>
#include <sys/time.h>
#include <sys/types.h>
#include "config.h"
#include "core/mp_msg.h"
#if !HAVE_WINSOCK2_H
#include <netdb.h>
#include <netinet/in.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#else
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#include "network.h"
#include "stream.h"
#include "tcp.h"
#include "libavutil/avstring.h"
/* IPv6 options */
int network_prefer_ipv4 = 0;
// Converts an address family constant to a string
static const char *af2String(int af) {
switch (af) {
case AF_INET: return "AF_INET";
#ifdef HAVE_AF_INET6
case AF_INET6: return "AF_INET6";
#endif
default: return "Unknown address family!";
}
}
// Connect to a server using a TCP connection, with specified address family
// return -2 for fatal error, like unable to resolve name, connection timeout...
// return -1 is unable to connect to a particular port
static int
connect2Server_with_af(char *host, int port, int af,int verb) {
int socket_server_fd;
int err;
socklen_t err_len;
int ret,count = 0;
fd_set set;
struct timeval tv;
union {
struct sockaddr_in four;
#ifdef HAVE_AF_INET6
struct sockaddr_in6 six;
#endif
} server_address;
size_t server_address_size;
void *our_s_addr; // Pointer to sin_addr or sin6_addr
struct hostent *hp=NULL;
char buf[255];
#if HAVE_WINSOCK2_H
unsigned long val;
int to;
#else
struct timeval to;
#endif
#if HAVE_WINSOCK2_H && defined(HAVE_AF_INET6)
// our winsock name resolution code can not handle IPv6
if (af == AF_INET6) {
mp_msg(MSGT_NETWORK, MSGL_WARN, "IPv6 not supported for winsock2\n");
return TCP_ERROR_FATAL;
}
#endif
socket_server_fd = socket(af, SOCK_STREAM, 0);
if( socket_server_fd==-1 ) {
// mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to create %s socket:\n", af2String(af));
return TCP_ERROR_FATAL;
}
#if defined(SO_RCVTIMEO) && defined(SO_SNDTIMEO)
#if HAVE_WINSOCK2_H
/* timeout in milliseconds */
to = 10 * 1000;
#else
to.tv_sec = 10;
to.tv_usec = 0;
#endif
setsockopt(socket_server_fd, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to));
setsockopt(socket_server_fd, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof(to));
#endif
switch (af) {
case AF_INET: our_s_addr = (void *) &server_address.four.sin_addr; break;
#ifdef HAVE_AF_INET6
case AF_INET6: our_s_addr = (void *) &server_address.six.sin6_addr; break;
#endif
default:
mp_tmsg(MSGT_NETWORK,MSGL_ERR, "Unknown address family %d\n", af);
return TCP_ERROR_FATAL;
}
memset(&server_address, 0, sizeof(server_address));
#if HAVE_INET_PTON
if (inet_pton(af, host, our_s_addr)!=1)
#elif HAVE_INET_ATON
if (inet_aton(host, our_s_addr)!=1)
#elif HAVE_WINSOCK2_H
if ( inet_addr(host)==INADDR_NONE )
#endif
{
if(verb) mp_tmsg(MSGT_NETWORK,MSGL_STATUS,"Resolving %s for %s...\n", host, af2String(af));
#ifdef HAVE_GETHOSTBYNAME2
hp=(struct hostent*)gethostbyname2( host, af );
#else
hp=(struct hostent*)gethostbyname( host );
#endif
if( hp==NULL ) {
if(verb) mp_tmsg(MSGT_NETWORK,MSGL_ERR,"Couldn't resolve name for %s: %s\n", af2String(af), host);
return TCP_ERROR_FATAL;
}
memcpy( our_s_addr, (void*)hp->h_addr_list[0], hp->h_length );
}
#if HAVE_WINSOCK2_H
else {
unsigned long addr = inet_addr(host);
memcpy( our_s_addr, (void*)&addr, sizeof(addr) );
}
#endif
switch (af) {
case AF_INET:
server_address.four.sin_family=af;
server_address.four.sin_port=htons(port);
server_address_size = sizeof(server_address.four);
break;
#ifdef HAVE_AF_INET6
case AF_INET6:
server_address.six.sin6_family=af;
server_address.six.sin6_port=htons(port);
server_address_size = sizeof(server_address.six);
break;
#endif
default:
mp_tmsg(MSGT_NETWORK,MSGL_ERR, "Unknown address family %d\n", af);
return TCP_ERROR_FATAL;
}
#if HAVE_INET_PTON
inet_ntop(af, our_s_addr, buf, 255);
#elif HAVE_INET_ATON || defined(HAVE_WINSOCK2_H)
av_strlcpy( buf, inet_ntoa( *((struct in_addr*)our_s_addr) ), 255);
#endif
if(verb) mp_tmsg(MSGT_NETWORK,MSGL_STATUS,"Connecting to server %s[%s]: %d...\n", host, buf , port );
// Turn the socket as non blocking so we can timeout on the connection
#if !HAVE_WINSOCK2_H
fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) | O_NONBLOCK );
#else
val = 1;
ioctlsocket( socket_server_fd, FIONBIO, &val );
#endif
if( connect( socket_server_fd, (struct sockaddr*)&server_address, server_address_size )==-1 ) {
#if !HAVE_WINSOCK2_H
if( errno!=EINPROGRESS ) {
#else
if( (WSAGetLastError() != WSAEINPROGRESS) && (WSAGetLastError() != WSAEWOULDBLOCK) ) {
#endif
if(verb) mp_tmsg(MSGT_NETWORK,MSGL_ERR,"Failed to connect to server with %s\n", af2String(af));
closesocket(socket_server_fd);
return TCP_ERROR_PORT;
}
}
tv.tv_sec = 0;
tv.tv_usec = 500000;
FD_ZERO( &set );
FD_SET( socket_server_fd, &set );
// When the connection will be made, we will have a writeable fd
while((ret = select(socket_server_fd+1, NULL, &set, NULL, &tv)) == 0) {
if(count > 30 || stream_check_interrupt(500)) {
if(count > 30)
mp_tmsg(MSGT_NETWORK,MSGL_ERR,"connection timeout\n");
else
mp_msg(MSGT_NETWORK,MSGL_V,"Connection interrupted by user\n");
return TCP_ERROR_TIMEOUT;
}
count++;
FD_ZERO( &set );
FD_SET( socket_server_fd, &set );
tv.tv_sec = 0;
tv.tv_usec = 500000;
}
if (ret < 0) mp_tmsg(MSGT_NETWORK,MSGL_ERR,"Select failed.\n");
// Turn back the socket as blocking
#if !HAVE_WINSOCK2_H
fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) & ~O_NONBLOCK );
#else
val = 0;
ioctlsocket( socket_server_fd, FIONBIO, &val );
#endif
// Check if there were any errors
err_len = sizeof(int);
ret = getsockopt(socket_server_fd,SOL_SOCKET,SO_ERROR,&err,&err_len);
if(ret < 0) {
mp_tmsg(MSGT_NETWORK,MSGL_ERR,"getsockopt failed: %s\n",strerror(errno));
return TCP_ERROR_FATAL;
}
if(err > 0) {
mp_tmsg(MSGT_NETWORK,MSGL_ERR,"connect error: %s\n",strerror(err));
return TCP_ERROR_PORT;
}
return socket_server_fd;
}
// Connect to a server using a TCP connection
// return -2 for fatal error, like unable to resolve name, connection timeout...
// return -1 is unable to connect to a particular port
int
connect2Server(char *host, int port, int verb) {
#ifdef HAVE_AF_INET6
int r;
int s = TCP_ERROR_FATAL;
r = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET:AF_INET6,verb);
if (r >= 0) return r;
s = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET6:AF_INET,verb);
if (s == TCP_ERROR_FATAL) return r;
return s;
#else
return connect2Server_with_af(host, port, AF_INET,verb);
#endif
}
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