code.delx.au - pulseaudio/blob - src/pulsecore/socket-util.c

   1 /* $Id$ */
   2
   3 /***
   4   This file is part of PulseAudio.
   5
   6   Copyright 2004-2006 Lennart Poettering
   7   Copyright 2004 Joe Marcus Clarke
   8   Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
   9
  10   PulseAudio is free software; you can redistribute it and/or modify
  11   it under the terms of the GNU Lesser General Public License as published
  12   by the Free Software Foundation; either version 2 of the License,
  13   or (at your option) any later version.
  14
  15   PulseAudio is distributed in the hope that it will be useful, but
  16   WITHOUT ANY WARRANTY; without even the implied warranty of
  17   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  18   General Public License for more details.
  19
  20   You should have received a copy of the GNU Lesser General Public License
  21   along with PulseAudio; if not, write to the Free Software
  22   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  23   USA.
  24 ***/
  25
  26 #ifdef HAVE_CONFIG_H
  27 #include <config.h>
  28 #endif
  29
  30 #include <stdarg.h>
  31 #include <stdlib.h>
  32 #include <signal.h>
  33 #include <errno.h>
  34 #include <string.h>
  35 #include <stdio.h>
  36 #include <sys/types.h>
  37 #include <fcntl.h>
  38 #include <unistd.h>
  39 #include <sys/stat.h>
  40
  41 #ifdef HAVE_SYS_SOCKET_H
  42 #include <sys/socket.h>
  43 #endif
  44 #ifdef HAVE_SYS_UN_H
  45 #include <sys/un.h>
  46 #endif
  47 #ifdef HAVE_NETINET_IN_H
  48 #include <netinet/in.h>
  49 #endif
  50 #ifdef HAVE_NETINET_IN_SYSTM_H
  51 #include <netinet/in_systm.h>
  52 #endif
  53 #ifdef HAVE_NETINET_IP_H
  54 #include <netinet/ip.h>
  55 #endif
  56 #ifdef HAVE_NETINET_TCP_H
  57 #include <netinet/tcp.h>
  58 #endif
  59 #ifdef HAVE_NETDB_H
  60 #include <netdb.h>
  61 #endif
  62 #ifdef HAVE_ARPA_INET_H
  63 #include <arpa/inet.h>
  64 #endif
  65
  66 #ifndef HAVE_INET_NTOP
  67 #include "inet_ntop.h"
  68 #endif
  69
  70 #include "winsock.h"
  71
  72 #include <pulse/xmalloc.h>
  73
  74 #include <pulsecore/core-error.h>
  75 #include <pulsecore/core-util.h>
  76 #include <pulsecore/log.h>
  77 #include <pulsecore/macro.h>
  78
  79 #include "socket-util.h"
  80
  81 void pa_socket_peer_to_string(int fd, char *c, size_t l) {
  82     struct stat st;
  83
  84     pa_assert(fd >= 0);
  85     pa_assert(c);
  86     pa_assert(l > 0);
  87
  88 #ifndef OS_IS_WIN32
  89     pa_assert_se(fstat(fd, &st) == 0);
  90 #endif
  91
  92 #ifndef OS_IS_WIN32
  93     if (S_ISSOCK(st.st_mode)) {
  94 #endif
  95         union {
  96             struct sockaddr sa;
  97             struct sockaddr_in in;
  98             struct sockaddr_in6 in6;
  99 #ifdef HAVE_SYS_UN_H
 100             struct sockaddr_un un;
 101 #endif
 102         } sa;
 103         socklen_t sa_len = sizeof(sa);
 104
 105         if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
 106
 107             if (sa.sa.sa_family == AF_INET) {
 108                 uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
 109
 110                 pa_snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
 111                             ip >> 24,
 112                             (ip >> 16) & 0xFF,
 113                             (ip >> 8) & 0xFF,
 114                             ip & 0xFF,
 115                             ntohs(sa.in.sin_port));
 116                 return;
 117             } else if (sa.sa.sa_family == AF_INET6) {
 118                 char buf[INET6_ADDRSTRLEN];
 119                 const char *res;
 120
 121                 res = inet_ntop(AF_INET6, &sa.in6.sin6_addr, buf, sizeof(buf));
 122                 if (res) {
 123                     pa_snprintf(c, l, "TCP/IP client from [%s]:%u", buf, ntohs(sa.in6.sin6_port));
 124                     return;
 125                 }
 126 #ifdef HAVE_SYS_UN_H
 127             } else if (sa.sa.sa_family == AF_UNIX) {
 128                 pa_snprintf(c, l, "UNIX socket client");
 129                 return;
 130 #endif
 131             }
 132
 133         }
 134 #ifndef OS_IS_WIN32
 135         pa_snprintf(c, l, "Unknown network client");
 136         return;
 137     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
 138         pa_snprintf(c, l, "STDIN/STDOUT client");
 139         return;
 140     }
 141 #endif /* OS_IS_WIN32 */
 142
 143     pa_snprintf(c, l, "Unknown client");
 144 }
 145
 146 int pa_socket_low_delay(int fd) {
 147
 148 #ifdef SO_PRIORITY
 149     int priority;
 150     pa_assert(fd >= 0);
 151
 152     priority = 7;
 153     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, (void*)&priority, sizeof(priority)) < 0) {
 154         pa_log_warn("SO_PRIORITY failed: %s", pa_cstrerror(errno));
 155         return -1;
 156     }
 157 #endif
 158
 159     return 0;
 160 }
 161
 162 int pa_socket_tcp_low_delay(int fd) {
 163     int ret, tos, on;
 164
 165     pa_assert(fd >= 0);
 166
 167     ret = pa_socket_low_delay(fd);
 168
 169     on = 1;
 170     tos = 0;
 171
 172 #if defined(SOL_TCP) || defined(IPPROTO_TCP)
 173 #if defined(SOL_TCP)
 174     if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 175 #else
 176     if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 177 #endif
 178     {
 179         pa_log_warn("TCP_NODELAY failed: %s", pa_cstrerror(errno));
 180         ret = -1;
 181     }
 182 #endif
 183
 184 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || defined(IPPROTO_IP))
 185     tos = IPTOS_LOWDELAY;
 186 #ifdef SOL_IP
 187     if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 188 #else
 189     if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 190 #endif
 191     {
 192         pa_log_warn("IP_TOS failed: %s", pa_cstrerror(errno));
 193         ret = -1;
 194     }
 195 #endif
 196
 197     return ret;
 198 }
 199
 200 int pa_socket_udp_low_delay(int fd) {
 201     int ret, tos;
 202
 203     pa_assert(fd >= 0);
 204
 205     ret = pa_socket_low_delay(fd);
 206
 207     tos = 0;
 208
 209 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || defined(IPPROTO_IP))
 210     tos = IPTOS_LOWDELAY;
 211 #ifdef SOL_IP
 212     if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 213 #else
 214     if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 215 #endif
 216     {
 217         ret = -1;
 218         pa_log_warn("IP_TOS failed: %s", pa_cstrerror(errno));
 219     }
 220 #endif
 221
 222     return ret;
 223 }
 224
 225 int pa_socket_set_rcvbuf(int fd, size_t l) {
 226     pa_assert(fd >= 0);
 227
 228     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void*)&l, sizeof(l)) < 0) {
 229         pa_log_warn("SO_RCVBUF: %s", pa_cstrerror(errno));
 230         return -1;
 231     }
 232
 233     return 0;
 234 }
 235
 236 int pa_socket_set_sndbuf(int fd, size_t l) {
 237     pa_assert(fd >= 0);
 238
 239     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void*)&l, sizeof(l)) < 0) {
 240         pa_log("SO_SNDBUF: %s", pa_cstrerror(errno));
 241         return -1;
 242     }
 243
 244     return 0;
 245 }
 246
 247 #ifdef HAVE_SYS_UN_H
 248
 249 int pa_unix_socket_is_stale(const char *fn) {
 250     struct sockaddr_un sa;
 251     int fd = -1, ret = -1;
 252
 253     pa_assert(fn);
 254
 255     if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
 256         pa_log("socket(): %s", pa_cstrerror(errno));
 257         goto finish;
 258     }
 259
 260     sa.sun_family = AF_UNIX;
 261     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 262     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 263
 264     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 265         if (errno == ECONNREFUSED)
 266             ret = 1;
 267     } else
 268         ret = 0;
 269
 270 finish:
 271     if (fd >= 0)
 272         pa_close(fd);
 273
 274     return ret;
 275 }
 276
 277 int pa_unix_socket_remove_stale(const char *fn) {
 278     int r;
 279
 280     pa_assert(fn);
 281
 282     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 283         return errno != ENOENT ? -1 : 0;
 284
 285     if (!r)
 286         return 0;
 287
 288     /* Yes, here is a race condition. But who cares? */
 289     if (unlink(fn) < 0)
 290         return -1;
 291
 292     return 0;
 293 }
 294
 295 #else /* HAVE_SYS_UN_H */
 296
 297 int pa_unix_socket_is_stale(const char *fn) {
 298     return -1;
 299 }
 300
 301 int pa_unix_socket_remove_stale(const char *fn) {
 302     return -1;
 303 }
 304
 305 #endif /* HAVE_SYS_UN_H */