posix/JackSocket.cpp

   1 /*
   2 Copyright (C) 2004-2008 Grame
   3
   4 This program is free software; you can redistribute it and/or modify
   5 it under the terms of the GNU Lesser General Public License as published by
   6 the Free Software Foundation; either version 2.1 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU Lesser General Public License for more details.
  13
  14 You should have received a copy of the GNU Lesser General Public License
  15 along with this program; if not, write to the Free Software
  16 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  17
  18 */
  19
  20 #include "JackSocket.h"
  21 #include "JackConstants.h"
  22 #include "JackTools.h"
  23 #include "JackError.h"
  24 #include <string.h>
  25 #include <stdio.h>
  26 #include <pthread.h>
  27 #include <fcntl.h>
  28
  29 namespace Jack
  30 {
  31
  32 static void BuildName(const char* client_name, char* res, const char* dir, int which)
  33 {
  34     char ext_client_name[JACK_CLIENT_NAME_SIZE + 1];
  35     JackTools::RewriteName(client_name, ext_client_name);
  36     sprintf(res, "%s/jack_%s_%d_%d", dir, ext_client_name, JackTools::GetUID(), which);
  37 }
  38
  39 JackClientSocket::JackClientSocket(int socket): fSocket(socket),fTimeOut(0)
  40 {}
  41
  42 #if defined(__sun__) || defined(sun)
  43
  44 void JackClientSocket::SetReadTimeOut(long sec)
  45 {
  46     int flags;
  47     fTimeOut = sec;
  48
  49     if ((flags = fcntl(fSocket, F_GETFL, 0)) < 0) {
  50                 jack_error("JackClientSocket::SetReadTimeOut error in fcntl F_GETFL");
  51                 return;
  52         }
  53
  54         flags |= O_NONBLOCK;
  55         if (fcntl(fSocket, F_SETFL, flags) < 0) {
  56                 jack_error("JackClientSocket::SetReadTimeOut error in fcntl F_SETFL");
  57                 return;
  58         }
  59 }
  60
  61 void JackClientSocket::SetWriteTimeOut(long sec)
  62 {
  63     int flags;
  64     fTimeOut = sec;
  65
  66     if ((flags = fcntl(fSocket, F_GETFL, 0)) < 0) {
  67                 jack_error("JackClientSocket::SetWriteTimeOut error in fcntl F_GETFL");
  68                 return;
  69         }
  70
  71         flags |= O_NONBLOCK;
  72         if (fcntl(fSocket, F_SETFL, flags) < 0) {
  73                 jack_error("JackClientSocket::SetWriteTimeOut error in fcntl F_SETFL");
  74                 return;
  75         }
  76 }
  77
  78 #else
  79
  80 void JackClientSocket::SetReadTimeOut(long sec)
  81 {
  82     struct timeval timout;
  83     timout.tv_sec = sec;
  84     timout.tv_usec = 0;
  85     if (setsockopt(fSocket, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timout, sizeof(timeval)) < 0) {
  86         jack_error("SetReadTimeOut fd = %ld err = %s", fSocket, strerror(errno));
  87     }
  88 }
  89
  90 void JackClientSocket::SetWriteTimeOut(long sec)
  91 {
  92     struct timeval timout;
  93     timout.tv_sec = sec ;
  94     timout.tv_usec = 0;
  95     if (setsockopt(fSocket, SOL_SOCKET, SO_SNDTIMEO, (const char*)&timout, sizeof(timeval)) < 0) {
  96         jack_error("SetWriteTimeOut fd = %ld err = %s", fSocket, strerror(errno));
  97     }
  98 }
  99
 100 #endif
 101
 102 void JackClientSocket::SetNonBlocking(bool onoff)
 103 {
 104     if (onoff) {
 105         long flags = 0;
 106         if (fcntl(fSocket, F_SETFL, flags | O_NONBLOCK) < 0) {
 107             jack_error("SetNonBlocking fd = %ld err = %s", fSocket, strerror(errno));
 108         }
 109     }
 110 }
 111
 112 int JackClientSocket::Connect(const char* dir, const char* name, int which) // A revoir : utilisation de "which"
 113 {
 114     struct sockaddr_un addr;
 115
 116     if ((fSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
 117         jack_error("Cannot create socket err = %s", strerror(errno));
 118         return -1;
 119     }
 120
 121     addr.sun_family = AF_UNIX;
 122     BuildName(name, addr.sun_path, dir, which);
 123     jack_log("Connect: addr.sun_path %s", addr.sun_path);
 124
 125     if (connect(fSocket, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
 126         jack_error("Cannot connect to server socket err = %s", strerror(errno));
 127         close(fSocket);
 128         return -1;
 129     }
 130
 131 #ifdef __APPLE__
 132     int on = 1 ;
 133     if (setsockopt(fSocket, SOL_SOCKET, SO_NOSIGPIPE, (const char*)&on, sizeof(on)) < 0) {
 134         jack_log("setsockopt SO_NOSIGPIPE fd = %ld err = %s", fSocket, strerror(errno));
 135     }
 136 #endif
 137
 138     return 0;
 139 }
 140
 141 int JackClientSocket::Close()
 142 {
 143     jack_log("JackClientSocket::Close");
 144     if (fSocket > 0) {
 145         shutdown(fSocket, SHUT_RDWR);
 146         close(fSocket);
 147         fSocket = -1;
 148         return 0;
 149     } else {
 150         return -1;
 151     }
 152 }
 153
 154 int JackClientSocket::Read(void* data, int len)
 155 {
 156     int res;
 157
 158 #if defined(__sun__) || defined(sun)
 159     if (fTimeOut > 0) {
 160
 161         struct timeval tv;
 162             fd_set fdset;
 163         ssize_t res;
 164
 165         tv.tv_sec = fTimeOut;
 166             tv.tv_usec = 0;
 167
 168             FD_ZERO(&fdset);
 169             FD_SET(fSocket, &fdset);
 170
 171             do {
 172                     res = select(fSocket + 1, &fdset, NULL, NULL, &tv);
 173             } while (res < 0 && errno == EINTR);
 174
 175             if (res < 0) {
 176                     return res;
 177         } else if (res == 0) {
 178                     return -1;
 179             }
 180     }
 181 #endif
 182
 183     if ((res = read(fSocket, data, len)) != len) {
 184         if (errno == EWOULDBLOCK) {
 185             jack_error("JackClientSocket::Read time out");
 186             return 0;  // For a non blocking socket, a read failure is not considered as an error
 187         } else if (res != 0) {
 188             jack_error("Cannot read socket fd = %d err = %s", fSocket, strerror(errno));
 189             return 0;
 190         } else {
 191             return -1;
 192         }
 193     } else {
 194         return 0;
 195     }
 196 }
 197
 198 int JackClientSocket::Write(void* data, int len)
 199 {
 200     int res;
 201
 202 #if defined(__sun__) || defined(sun)
 203     if (fTimeOut > 0) {
 204
 205         struct timeval tv;
 206             fd_set fdset;
 207         ssize_t res;
 208
 209         tv.tv_sec = fTimeOut;
 210             tv.tv_usec = 0;
 211
 212             FD_ZERO(&fdset);
 213             FD_SET(fSocket, &fdset);
 214
 215             do {
 216                     res = select(fSocket + 1, NULL, &fdset, NULL, &tv);
 217             } while (res < 0 && errno == EINTR);
 218
 219             if (res < 0) {
 220                     return res;
 221         } else if (res == 0) {
 222                    return -1;
 223             }
 224    }
 225 #endif
 226
 227     if ((res = write(fSocket, data, len)) != len) {
 228         if (errno == EWOULDBLOCK) {
 229             jack_log("JackClientSocket::Write time out");
 230             return 0;  // For a non blocking socket, a write failure is not considered as an error
 231         } else if (res != 0) {
 232             jack_error("Cannot write socket fd = %ld err = %s", fSocket, strerror(errno));
 233             return 0;
 234         } else {
 235             return -1;
 236         }
 237     } else {
 238         return 0;
 239     }
 240 }
 241
 242 int JackServerSocket::Bind(const char* dir, const char* name, int which) // A revoir : utilisation de "which"
 243 {
 244     struct sockaddr_un addr;
 245
 246     if ((fSocket = socket(AF_UNIX, SOCK_STREAM, 0)) < 0) {
 247         jack_error("Cannot create server socket err = %s", strerror(errno));
 248         return -1;
 249     }
 250
 251     addr.sun_family = AF_UNIX;
 252     BuildName(name, fName, dir, which);
 253     strncpy(addr.sun_path, fName, sizeof(addr.sun_path) - 1);
 254
 255     jack_log("Bind: addr.sun_path %s", addr.sun_path);
 256     unlink(fName); // Security...
 257
 258     if (bind(fSocket, (struct sockaddr*)&addr, sizeof(addr)) < 0) {
 259         jack_error("Cannot bind server to socket err = %s", strerror(errno));
 260         goto error;
 261     }
 262
 263     if (listen(fSocket, 1) < 0) {
 264         jack_error("Cannot enable listen on server socket err = %s", strerror(errno));
 265         goto error;
 266     }
 267
 268     return 0;
 269
 270 error:
 271     unlink(fName);
 272     close(fSocket);
 273     return -1;
 274 }
 275
 276 JackClientSocket* JackServerSocket::Accept()
 277 {
 278     struct sockaddr_un client_addr;
 279     socklen_t client_addrlen;
 280
 281     memset(&client_addr, 0, sizeof(client_addr));
 282     client_addrlen = sizeof(client_addr);
 283
 284     int fd = accept(fSocket, (struct sockaddr*)&client_addr, &client_addrlen);
 285     if (fd < 0) {
 286         jack_error("Cannot accept new connection err = %s", strerror(errno));
 287         return 0;
 288     } else {
 289         return new JackClientSocket(fd);
 290     }
 291 }
 292
 293 int JackServerSocket::Close()
 294 {
 295     if (fSocket > 0) {
 296         jack_log("JackServerSocket::Close %s", fName);
 297         shutdown(fSocket, SHUT_RDWR);
 298         close(fSocket);
 299         unlink(fName);
 300         fSocket = -1;
 301         return 0;
 302     } else {
 303         return -1;
 304     }
 305 }
 306
 307 } // end of namespace
 308
 309