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 #ifdef HAVE_IPV6
  97             struct sockaddr_in6 in6;
  98 #endif
  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 #ifdef HAVE_IPV6
 118             } else if (sa.sa.sa_family == AF_INET6) {
 119                 char buf[INET6_ADDRSTRLEN];
 120                 const char *res;
 121
 122                 res = inet_ntop(AF_INET6, &sa.in6.sin6_addr, buf, sizeof(buf));
 123                 if (res) {
 124                     pa_snprintf(c, l, "TCP/IP client from [%s]:%u", buf, ntohs(sa.in6.sin6_port));
 125                     return;
 126                 }
 127 #endif
 128 #ifdef HAVE_SYS_UN_H
 129             } else if (sa.sa.sa_family == AF_UNIX) {
 130                 pa_snprintf(c, l, "UNIX socket client");
 131                 return;
 132 #endif
 133             }
 134         }
 135
 136 #ifndef OS_IS_WIN32
 137         pa_snprintf(c, l, "Unknown network client");
 138         return;
 139     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
 140         pa_snprintf(c, l, "STDIN/STDOUT client");
 141         return;
 142     }
 143 #endif /* OS_IS_WIN32 */
 144
 145     pa_snprintf(c, l, "Unknown client");
 146 }
 147
 148 void pa_make_socket_low_delay(int fd) {
 149
 150 #ifdef SO_PRIORITY
 151     int priority;
 152     pa_assert(fd >= 0);
 153
 154     priority = 6;
 155     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, (void*)&priority, sizeof(priority)) < 0)
 156         pa_log_warn("SO_PRIORITY failed: %s", pa_cstrerror(errno));
 157 #endif
 158 }
 159
 160 void pa_make_tcp_socket_low_delay(int fd) {
 161     pa_assert(fd >= 0);
 162
 163     pa_make_socket_low_delay(fd);
 164
 165 #if defined(SOL_TCP) || defined(IPPROTO_TCP)
 166     {
 167         int on = 1;
 168 #if defined(SOL_TCP)
 169         if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 170 #else
 171         if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 172 #endif
 173             pa_log_warn("TCP_NODELAY failed: %s", pa_cstrerror(errno));
 174     }
 175 #endif
 176
 177 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || defined(IPPROTO_IP))
 178     {
 179         int tos = IPTOS_LOWDELAY;
 180 #ifdef SOL_IP
 181         if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 182 #else
 183         if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 184 #endif
 185             pa_log_warn("IP_TOS failed: %s", pa_cstrerror(errno));
 186     }
 187 #endif
 188 }
 189
 190 void pa_make_udp_socket_low_delay(int fd) {
 191     pa_assert(fd >= 0);
 192
 193     pa_make_socket_low_delay(fd);
 194
 195 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || defined(IPPROTO_IP))
 196     {
 197         int tos = IPTOS_LOWDELAY;
 198 #ifdef SOL_IP
 199         if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 200 #else
 201         if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 202 #endif
 203             pa_log_warn("IP_TOS failed: %s", pa_cstrerror(errno));
 204     }
 205 #endif
 206 }
 207
 208 int pa_socket_set_rcvbuf(int fd, size_t l) {
 209     int bufsz = (int)l;
 210
 211     pa_assert(fd >= 0);
 212
 213     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void*)&bufsz, sizeof(bufsz)) < 0) {
 214         pa_log_warn("SO_RCVBUF: %s", pa_cstrerror(errno));
 215         return -1;
 216     }
 217
 218     return 0;
 219 }
 220
 221 int pa_socket_set_sndbuf(int fd, size_t l) {
 222     int bufsz = (int)l;
 223
 224     pa_assert(fd >= 0);
 225
 226     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void*)&bufsz, sizeof(bufsz)) < 0) {
 227         pa_log("SO_SNDBUF: %s", pa_cstrerror(errno));
 228         return -1;
 229     }
 230
 231     return 0;
 232 }
 233
 234 #ifdef HAVE_SYS_UN_H
 235
 236 int pa_unix_socket_is_stale(const char *fn) {
 237     struct sockaddr_un sa;
 238     int fd = -1, ret = -1;
 239
 240     pa_assert(fn);
 241
 242     if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
 243         pa_log("socket(): %s", pa_cstrerror(errno));
 244         goto finish;
 245     }
 246
 247     sa.sun_family = AF_UNIX;
 248     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 249     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 250
 251     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 252         if (errno == ECONNREFUSED)
 253             ret = 1;
 254     } else
 255         ret = 0;
 256
 257 finish:
 258     if (fd >= 0)
 259         pa_close(fd);
 260
 261     return ret;
 262 }
 263
 264 int pa_unix_socket_remove_stale(const char *fn) {
 265     int r;
 266
 267     pa_assert(fn);
 268
 269     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 270         return errno != ENOENT ? -1 : 0;
 271
 272     if (!r)
 273         return 0;
 274
 275     /* Yes, here is a race condition. But who cares? */
 276     if (unlink(fn) < 0)
 277         return -1;
 278
 279     return 0;
 280 }
 281
 282 #else /* HAVE_SYS_UN_H */
 283
 284 int pa_unix_socket_is_stale(const char *fn) {
 285     return -1;
 286 }
 287
 288 int pa_unix_socket_remove_stale(const char *fn) {
 289     return -1;
 290 }
 291
 292 #endif /* HAVE_SYS_UN_H */
 293
 294
 295 pa_bool_t pa_socket_address_is_local(const struct sockaddr *sa) {
 296     pa_assert(sa);
 297
 298     switch (sa->sa_family) {
 299         case AF_UNIX:
 300             return TRUE;
 301
 302         case AF_INET:
 303             return ((const struct sockaddr_in*) sa)->sin_addr.s_addr == INADDR_LOOPBACK;
 304
 305 #ifdef HAVE_IPV6
 306         case AF_INET6:
 307             return memcmp(&((const struct sockaddr_in6*) sa)->sin6_addr, &in6addr_loopback, sizeof(struct in6_addr)) == 0;
 308 #endif
 309
 310         default:
 311             return FALSE;
 312     }
 313 }
 314
 315 pa_bool_t pa_socket_is_local(int fd) {
 316
 317     union {
 318         struct sockaddr sa;
 319         struct sockaddr_in in;
 320 #ifdef HAVE_IPV6
 321         struct sockaddr_in6 in6;
 322 #endif
 323 #ifdef HAVE_SYS_UN_H
 324         struct sockaddr_un un;
 325 #endif
 326     } sa;
 327     socklen_t sa_len = sizeof(sa);
 328
 329     if (getpeername(fd, &sa.sa, &sa_len) < 0)
 330         return FALSE;
 331
 332     return pa_socket_address_is_local(&sa.sa);
 333 }