stream/tcp.c

   1 /*
   2  * Network layer for MPlayer
   3  *
   4  * Copyright (C) 2001 Bertrand BAUDET <bertrand_baudet@yahoo.com>
   5  *
   6  * This file is part of MPlayer.
   7  *
   8  * MPlayer is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * MPlayer is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  20  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  21  */
  22
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <unistd.h>
  26
  27 #include <errno.h>
  28 #include <ctype.h>
  29
  30 #include <fcntl.h>
  31 #include <sys/time.h>
  32 #include <sys/types.h>
  33
  34 #include "config.h"
  35
  36 #include "mp_msg.h"
  37
  38 #if !HAVE_WINSOCK2_H
  39 #include <netdb.h>
  40 #include <netinet/in.h>
  41 #include <sys/socket.h>
  42 #include <arpa/inet.h>
  43 #else
  44 #include <winsock2.h>
  45 #include <ws2tcpip.h>
  46 #endif
  47
  48 #include "network.h"
  49 #include "stream.h"
  50 #include "tcp.h"
  51 #include "libavutil/avstring.h"
  52
  53 /* IPv6 options */
  54 int   network_prefer_ipv4 = 0;
  55
  56 // Converts an address family constant to a string
  57
  58 static const char *af2String(int af) {
  59         switch (af) {
  60                 case AF_INET:   return "AF_INET";
  61
  62 #ifdef HAVE_AF_INET6
  63                 case AF_INET6:  return "AF_INET6";
  64 #endif
  65                 default:        return "Unknown address family!";
  66         }
  67 }
  68
  69
  70
  71 // Connect to a server using a TCP connection, with specified address family
  72 // return -2 for fatal error, like unable to resolve name, connection timeout...
  73 // return -1 is unable to connect to a particular port
  74
  75 static int
  76 connect2Server_with_af(char *host, int port, int af,int verb) {
  77         int socket_server_fd;
  78         int err;
  79         socklen_t err_len;
  80         int ret,count = 0;
  81         fd_set set;
  82         struct timeval tv;
  83         union {
  84                 struct sockaddr_in four;
  85 #ifdef HAVE_AF_INET6
  86                 struct sockaddr_in6 six;
  87 #endif
  88         } server_address;
  89         size_t server_address_size;
  90         void *our_s_addr;       // Pointer to sin_addr or sin6_addr
  91         struct hostent *hp=NULL;
  92         char buf[255];
  93
  94 #if HAVE_WINSOCK2_H
  95         unsigned long val;
  96         int to;
  97 #else
  98         struct timeval to;
  99 #endif
 100
 101 #if HAVE_WINSOCK2_H && defined(HAVE_AF_INET6)
 102         // our winsock name resolution code can not handle IPv6
 103         if (af == AF_INET6) {
 104                 mp_msg(MSGT_NETWORK, MSGL_WARN, "IPv6 not supported for winsock2\n");
 105                 return TCP_ERROR_FATAL;
 106         }
 107 #endif
 108
 109         socket_server_fd = socket(af, SOCK_STREAM, 0);
 110
 111
 112         if( socket_server_fd==-1 ) {
 113 //              mp_msg(MSGT_NETWORK,MSGL_ERR,"Failed to create %s socket:\n", af2String(af));
 114                 return TCP_ERROR_FATAL;
 115         }
 116
 117 #if defined(SO_RCVTIMEO) && defined(SO_SNDTIMEO)
 118 #if HAVE_WINSOCK2_H
 119         /* timeout in milliseconds */
 120         to = 10 * 1000;
 121 #else
 122         to.tv_sec = 10;
 123         to.tv_usec = 0;
 124 #endif
 125         setsockopt(socket_server_fd, SOL_SOCKET, SO_RCVTIMEO, &to, sizeof(to));
 126         setsockopt(socket_server_fd, SOL_SOCKET, SO_SNDTIMEO, &to, sizeof(to));
 127 #endif
 128
 129         switch (af) {
 130                 case AF_INET:  our_s_addr = (void *) &server_address.four.sin_addr; break;
 131 #ifdef HAVE_AF_INET6
 132                 case AF_INET6: our_s_addr = (void *) &server_address.six.sin6_addr; break;
 133 #endif
 134                 default:
 135                         mp_tmsg(MSGT_NETWORK,MSGL_ERR, "Unknown address family %d\n", af);
 136                         return TCP_ERROR_FATAL;
 137         }
 138
 139
 140         memset(&server_address, 0, sizeof(server_address));
 141
 142 #if HAVE_INET_PTON
 143         if (inet_pton(af, host, our_s_addr)!=1)
 144 #elif HAVE_INET_ATON
 145         if (inet_aton(host, our_s_addr)!=1)
 146 #elif HAVE_WINSOCK2_H
 147         if ( inet_addr(host)==INADDR_NONE )
 148 #endif
 149         {
 150                 if(verb) mp_tmsg(MSGT_NETWORK,MSGL_STATUS,"Resolving %s for %s...\n", host, af2String(af));
 151
 152 #ifdef HAVE_GETHOSTBYNAME2
 153                 hp=(struct hostent*)gethostbyname2( host, af );
 154 #else
 155                 hp=(struct hostent*)gethostbyname( host );
 156 #endif
 157                 if( hp==NULL ) {
 158                         if(verb) mp_tmsg(MSGT_NETWORK,MSGL_ERR,"Couldn't resolve name for %s: %s\n", af2String(af), host);
 159                         return TCP_ERROR_FATAL;
 160                 }
 161
 162                 memcpy( our_s_addr, (void*)hp->h_addr_list[0], hp->h_length );
 163         }
 164 #if HAVE_WINSOCK2_H
 165         else {
 166                 unsigned long addr = inet_addr(host);
 167                 memcpy( our_s_addr, (void*)&addr, sizeof(addr) );
 168         }
 169 #endif
 170
 171         switch (af) {
 172                 case AF_INET:
 173                         server_address.four.sin_family=af;
 174                         server_address.four.sin_port=htons(port);
 175                         server_address_size = sizeof(server_address.four);
 176                         break;
 177 #ifdef HAVE_AF_INET6
 178                 case AF_INET6:
 179                         server_address.six.sin6_family=af;
 180                         server_address.six.sin6_port=htons(port);
 181                         server_address_size = sizeof(server_address.six);
 182                         break;
 183 #endif
 184                 default:
 185                         mp_tmsg(MSGT_NETWORK,MSGL_ERR, "Unknown address family %d\n", af);
 186                         return TCP_ERROR_FATAL;
 187         }
 188
 189 #if HAVE_INET_PTON
 190         inet_ntop(af, our_s_addr, buf, 255);
 191 #elif HAVE_INET_ATON || defined(HAVE_WINSOCK2_H)
 192         av_strlcpy( buf, inet_ntoa( *((struct in_addr*)our_s_addr) ), 255);
 193 #endif
 194         if(verb) mp_tmsg(MSGT_NETWORK,MSGL_STATUS,"Connecting to server %s[%s]: %d...\n", host, buf , port );
 195
 196         // Turn the socket as non blocking so we can timeout on the connection
 197 #if !HAVE_WINSOCK2_H
 198         fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) | O_NONBLOCK );
 199 #else
 200         val = 1;
 201         ioctlsocket( socket_server_fd, FIONBIO, &val );
 202 #endif
 203         if( connect( socket_server_fd, (struct sockaddr*)&server_address, server_address_size )==-1 ) {
 204 #if !HAVE_WINSOCK2_H
 205                 if( errno!=EINPROGRESS ) {
 206 #else
 207                 if( (WSAGetLastError() != WSAEINPROGRESS) && (WSAGetLastError() != WSAEWOULDBLOCK) ) {
 208 #endif
 209                         if(verb) mp_tmsg(MSGT_NETWORK,MSGL_ERR,"Failed to connect to server with %s\n", af2String(af));
 210                         closesocket(socket_server_fd);
 211                         return TCP_ERROR_PORT;
 212                 }
 213         }
 214         tv.tv_sec = 0;
 215         tv.tv_usec = 500000;
 216         FD_ZERO( &set );
 217         FD_SET( socket_server_fd, &set );
 218         // When the connection will be made, we will have a writeable fd
 219         while((ret = select(socket_server_fd+1, NULL, &set, NULL, &tv)) == 0) {
 220               if(count > 30 || stream_check_interrupt(500)) {
 221                 if(count > 30)
 222                   mp_tmsg(MSGT_NETWORK,MSGL_ERR,"connection timeout\n");
 223                 else
 224                   mp_msg(MSGT_NETWORK,MSGL_V,"Connection interrupted by user\n");
 225                 return TCP_ERROR_TIMEOUT;
 226               }
 227               count++;
 228               FD_ZERO( &set );
 229               FD_SET( socket_server_fd, &set );
 230               tv.tv_sec = 0;
 231               tv.tv_usec = 500000;
 232         }
 233         if (ret < 0) mp_tmsg(MSGT_NETWORK,MSGL_ERR,"Select failed.\n");
 234
 235         // Turn back the socket as blocking
 236 #if !HAVE_WINSOCK2_H
 237         fcntl( socket_server_fd, F_SETFL, fcntl(socket_server_fd, F_GETFL) & ~O_NONBLOCK );
 238 #else
 239         val = 0;
 240         ioctlsocket( socket_server_fd, FIONBIO, &val );
 241 #endif
 242         // Check if there were any errors
 243         err_len = sizeof(int);
 244         ret =  getsockopt(socket_server_fd,SOL_SOCKET,SO_ERROR,&err,&err_len);
 245         if(ret < 0) {
 246                 mp_tmsg(MSGT_NETWORK,MSGL_ERR,"getsockopt failed: %s\n",strerror(errno));
 247                 return TCP_ERROR_FATAL;
 248         }
 249         if(err > 0) {
 250                 mp_tmsg(MSGT_NETWORK,MSGL_ERR,"connect error: %s\n",strerror(err));
 251                 return TCP_ERROR_PORT;
 252         }
 253
 254         return socket_server_fd;
 255 }
 256
 257 // Connect to a server using a TCP connection
 258 // return -2 for fatal error, like unable to resolve name, connection timeout...
 259 // return -1 is unable to connect to a particular port
 260
 261
 262 int
 263 connect2Server(char *host, int  port, int verb) {
 264 #ifdef HAVE_AF_INET6
 265         int r;
 266         int s = TCP_ERROR_FATAL;
 267
 268         r = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET:AF_INET6,verb);
 269         if (r >= 0) return r;
 270
 271         s = connect2Server_with_af(host, port, network_prefer_ipv4 ? AF_INET6:AF_INET,verb);
 272         if (s == TCP_ERROR_FATAL) return r;
 273         return s;
 274 #else
 275         return connect2Server_with_af(host, port, AF_INET,verb);
 276 #endif
 277
 278
 279 }