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

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5   Copyright 2004 Joe Marcus Clarke
   6   Copyright 2006-2007 Pierre Ossman <ossman@cendio.se> for Cendio AB
   7
   8   PulseAudio is free software; you can redistribute it and/or modify
   9   it under the terms of the GNU Lesser General Public License as published
  10   by the Free Software Foundation; either version 2 of the License,
  11   or (at your option) any later version.
  12
  13   PulseAudio is distributed in the hope that it will be useful, but
  14   WITHOUT ANY WARRANTY; without even the implied warranty of
  15   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  16   General Public License for more details.
  17
  18   You should have received a copy of the GNU Lesser General Public License
  19   along with PulseAudio; if not, write to the Free Software
  20   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  21   USA.
  22 ***/
  23
  24 #ifdef HAVE_CONFIG_H
  25 #include <config.h>
  26 #endif
  27
  28 #include <stdarg.h>
  29 #include <stdlib.h>
  30 #include <signal.h>
  31 #include <errno.h>
  32 #include <string.h>
  33 #include <stdio.h>
  34 #include <sys/types.h>
  35 #include <fcntl.h>
  36 #include <unistd.h>
  37 #include <sys/stat.h>
  38
  39 #ifdef HAVE_SYS_SOCKET_H
  40 #include <sys/socket.h>
  41 #endif
  42 #ifdef HAVE_SYS_UN_H
  43 #include <sys/un.h>
  44 #endif
  45 #ifdef HAVE_NETINET_IN_H
  46 #include <netinet/in.h>
  47 #endif
  48 #ifdef HAVE_NETINET_IN_SYSTM_H
  49 #include <netinet/in_systm.h>
  50 #endif
  51 #ifdef HAVE_NETINET_IP_H
  52 #include <netinet/ip.h>
  53 #endif
  54 #ifdef HAVE_NETINET_TCP_H
  55 #include <netinet/tcp.h>
  56 #endif
  57 #ifdef HAVE_NETDB_H
  58 #include <netdb.h>
  59 #endif
  60 #ifdef HAVE_ARPA_INET_H
  61 #include <arpa/inet.h>
  62 #endif
  63
  64 #ifndef HAVE_INET_NTOP
  65 #include "inet_ntop.h"
  66 #endif
  67
  68 #include "winsock.h"
  69
  70 #include <pulse/xmalloc.h>
  71
  72 #include <pulsecore/core-error.h>
  73 #include <pulsecore/core-util.h>
  74 #include <pulsecore/log.h>
  75 #include <pulsecore/macro.h>
  76
  77 #include "socket-util.h"
  78
  79 void pa_socket_peer_to_string(int fd, char *c, size_t l) {
  80     struct stat st;
  81
  82     pa_assert(fd >= 0);
  83     pa_assert(c);
  84     pa_assert(l > 0);
  85
  86 #ifndef OS_IS_WIN32
  87     pa_assert_se(fstat(fd, &st) == 0);
  88 #endif
  89
  90 #ifndef OS_IS_WIN32
  91     if (S_ISSOCK(st.st_mode)) {
  92 #endif
  93         union {
  94             struct sockaddr sa;
  95             struct sockaddr_in in;
  96             struct sockaddr_in6 in6;
  97 #ifdef HAVE_SYS_UN_H
  98             struct sockaddr_un un;
  99 #endif
 100         } sa;
 101         socklen_t sa_len = sizeof(sa);
 102
 103         if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
 104
 105             if (sa.sa.sa_family == AF_INET) {
 106                 uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
 107
 108                 pa_snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
 109                             ip >> 24,
 110                             (ip >> 16) & 0xFF,
 111                             (ip >> 8) & 0xFF,
 112                             ip & 0xFF,
 113                             ntohs(sa.in.sin_port));
 114                 return;
 115             } else if (sa.sa.sa_family == AF_INET6) {
 116                 char buf[INET6_ADDRSTRLEN];
 117                 const char *res;
 118
 119                 res = inet_ntop(AF_INET6, &sa.in6.sin6_addr, buf, sizeof(buf));
 120                 if (res) {
 121                     pa_snprintf(c, l, "TCP/IP client from [%s]:%u", buf, ntohs(sa.in6.sin6_port));
 122                     return;
 123                 }
 124 #ifdef HAVE_SYS_UN_H
 125             } else if (sa.sa.sa_family == AF_UNIX) {
 126                 pa_snprintf(c, l, "UNIX socket client");
 127                 return;
 128 #endif
 129             }
 130         }
 131
 132 #ifndef OS_IS_WIN32
 133         pa_snprintf(c, l, "Unknown network client");
 134         return;
 135     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
 136         pa_snprintf(c, l, "STDIN/STDOUT client");
 137         return;
 138     }
 139 #endif /* OS_IS_WIN32 */
 140
 141     pa_snprintf(c, l, "Unknown client");
 142 }
 143
 144 void pa_make_socket_low_delay(int fd) {
 145
 146 #ifdef SO_PRIORITY
 147     int priority;
 148     pa_assert(fd >= 0);
 149
 150     priority = 6;
 151     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, (void*)&priority, sizeof(priority)) < 0)
 152         pa_log_warn("SO_PRIORITY failed: %s", pa_cstrerror(errno));
 153 #endif
 154 }
 155
 156 void pa_make_tcp_socket_low_delay(int fd) {
 157     pa_assert(fd >= 0);
 158
 159     pa_make_socket_low_delay(fd);
 160
 161 #if defined(SOL_TCP) || defined(IPPROTO_TCP)
 162     {
 163         int on = 1;
 164 #if defined(SOL_TCP)
 165         if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 166 #else
 167         if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 168 #endif
 169             pa_log_warn("TCP_NODELAY failed: %s", pa_cstrerror(errno));
 170     }
 171 #endif
 172
 173 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || defined(IPPROTO_IP))
 174     {
 175         int tos = IPTOS_LOWDELAY;
 176 #ifdef SOL_IP
 177         if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 178 #else
 179         if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 180 #endif
 181             pa_log_warn("IP_TOS failed: %s", pa_cstrerror(errno));
 182     }
 183 #endif
 184 }
 185
 186 void pa_make_udp_socket_low_delay(int fd) {
 187     pa_assert(fd >= 0);
 188
 189     pa_make_socket_low_delay(fd);
 190
 191 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || defined(IPPROTO_IP))
 192     {
 193         int tos = IPTOS_LOWDELAY;
 194 #ifdef SOL_IP
 195         if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 196 #else
 197         if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 198 #endif
 199             pa_log_warn("IP_TOS failed: %s", pa_cstrerror(errno));
 200     }
 201 #endif
 202 }
 203
 204 int pa_socket_set_rcvbuf(int fd, size_t l) {
 205     pa_assert(fd >= 0);
 206
 207     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void*)&l, sizeof(l)) < 0) {
 208         pa_log_warn("SO_RCVBUF: %s", pa_cstrerror(errno));
 209         return -1;
 210     }
 211
 212     return 0;
 213 }
 214
 215 int pa_socket_set_sndbuf(int fd, size_t l) {
 216     pa_assert(fd >= 0);
 217
 218     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void*)&l, sizeof(l)) < 0) {
 219         pa_log("SO_SNDBUF: %s", pa_cstrerror(errno));
 220         return -1;
 221     }
 222
 223     return 0;
 224 }
 225
 226 #ifdef HAVE_SYS_UN_H
 227
 228 int pa_unix_socket_is_stale(const char *fn) {
 229     struct sockaddr_un sa;
 230     int fd = -1, ret = -1;
 231
 232     pa_assert(fn);
 233
 234     if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
 235         pa_log("socket(): %s", pa_cstrerror(errno));
 236         goto finish;
 237     }
 238
 239     sa.sun_family = AF_UNIX;
 240     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 241     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 242
 243     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 244         if (errno == ECONNREFUSED)
 245             ret = 1;
 246     } else
 247         ret = 0;
 248
 249 finish:
 250     if (fd >= 0)
 251         pa_close(fd);
 252
 253     return ret;
 254 }
 255
 256 int pa_unix_socket_remove_stale(const char *fn) {
 257     int r;
 258
 259     pa_assert(fn);
 260
 261     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 262         return errno != ENOENT ? -1 : 0;
 263
 264     if (!r)
 265         return 0;
 266
 267     /* Yes, here is a race condition. But who cares? */
 268     if (unlink(fn) < 0)
 269         return -1;
 270
 271     return 0;
 272 }
 273
 274 #else /* HAVE_SYS_UN_H */
 275
 276 int pa_unix_socket_is_stale(const char *fn) {
 277     return -1;
 278 }
 279
 280 int pa_unix_socket_remove_stale(const char *fn) {
 281     return -1;
 282 }
 283
 284 #endif /* HAVE_SYS_UN_H */
 285
 286
 287 pa_bool_t pa_socket_address_is_local(const struct sockaddr *sa) {
 288     pa_assert(sa);
 289
 290     switch (sa->sa_family) {
 291         case AF_UNIX:
 292             return TRUE;
 293
 294         case AF_INET:
 295             return ((const struct sockaddr_in*) sa)->sin_addr.s_addr == INADDR_LOOPBACK;
 296
 297         case AF_INET6:
 298             return memcmp(&((const struct sockaddr_in6*) sa)->sin6_addr, &in6addr_loopback, sizeof(struct in6_addr)) == 0;
 299
 300         default:
 301             return FALSE;
 302     }
 303 }
 304
 305 pa_bool_t pa_socket_is_local(int fd) {
 306
 307     union {
 308         struct sockaddr sa;
 309         struct sockaddr_in in;
 310         struct sockaddr_in6 in6;
 311 #ifdef HAVE_SYS_UN_H
 312         struct sockaddr_un un;
 313 #endif
 314     } sa;
 315     socklen_t sa_len = sizeof(sa);
 316
 317     if (getpeername(fd, &sa.sa, &sa_len) < 0)
 318         return FALSE;
 319
 320     return pa_socket_address_is_local(&sa.sa);
 321 }