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 <assert.h>
  35 #include <string.h>
  36 #include <stdio.h>
  37 #include <sys/types.h>
  38 #include <fcntl.h>
  39 #include <unistd.h>
  40 #include <sys/stat.h>
  41
  42 #ifdef HAVE_SYS_SOCKET_H
  43 #include <sys/socket.h>
  44 #endif
  45 #ifdef HAVE_SYS_UN_H
  46 #include <sys/un.h>
  47 #endif
  48 #ifdef HAVE_NETINET_IN_H
  49 #include <netinet/in.h>
  50 #endif
  51 #ifdef HAVE_NETINET_IN_SYSTM_H
  52 #include <netinet/in_systm.h>
  53 #endif
  54 #ifdef HAVE_NETINET_IP_H
  55 #include <netinet/ip.h>
  56 #endif
  57 #ifdef HAVE_NETINET_TCP_H
  58 #include <netinet/tcp.h>
  59 #endif
  60 #ifdef HAVE_NETDB_H
  61 #include <netdb.h>
  62 #endif
  63 #ifdef HAVE_ARPA_INET_H
  64 #include <arpa/inet.h>
  65 #endif
  66
  67 #ifndef HAVE_INET_NTOP
  68 #include "inet_ntop.h"
  69 #endif
  70
  71 #include "winsock.h"
  72
  73 #include <pulse/xmalloc.h>
  74
  75 #include <pulsecore/core-error.h>
  76 #include <pulsecore/core-util.h>
  77 #include <pulsecore/log.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     assert(c && l && fd >= 0);
  85
  86 #ifndef OS_IS_WIN32
  87     if (fstat(fd, &st) < 0) {
  88         snprintf(c, l, "Invalid client fd");
  89         return;
  90     }
  91 #endif
  92
  93 #ifndef OS_IS_WIN32
  94     if (S_ISSOCK(st.st_mode)) {
  95 #endif
  96         union {
  97             struct sockaddr sa;
  98             struct sockaddr_in in;
  99             struct sockaddr_in6 in6;
 100 #ifdef HAVE_SYS_UN_H
 101             struct sockaddr_un un;
 102 #endif
 103         } sa;
 104         socklen_t sa_len = sizeof(sa);
 105
 106         if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
 107
 108             if (sa.sa.sa_family == AF_INET) {
 109                 uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
 110
 111                 snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
 112                          ip >> 24,
 113                          (ip >> 16) & 0xFF,
 114                          (ip >> 8) & 0xFF,
 115                          ip & 0xFF,
 116                          ntohs(sa.in.sin_port));
 117                 return;
 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                     snprintf(c, l, "TCP/IP client from [%s]:%u", buf, ntohs(sa.in6.sin6_port));
 125                     return;
 126                 }
 127 #ifdef HAVE_SYS_UN_H
 128             } else if (sa.sa.sa_family == AF_UNIX) {
 129                 snprintf(c, l, "UNIX socket client");
 130                 return;
 131 #endif
 132             }
 133
 134         }
 135 #ifndef OS_IS_WIN32
 136         snprintf(c, l, "Unknown network client");
 137         return;
 138     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
 139         snprintf(c, l, "STDIN/STDOUT client");
 140         return;
 141     }
 142 #endif /* OS_IS_WIN32 */
 143
 144     snprintf(c, l, "Unknown client");
 145 }
 146
 147 int pa_socket_low_delay(int fd) {
 148 #ifdef SO_PRIORITY
 149     int priority;
 150     assert(fd >= 0);
 151
 152     priority = 7;
 153     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, (void*)&priority, sizeof(priority)) < 0)
 154         return -1;
 155 #endif
 156
 157     return 0;
 158 }
 159
 160 int pa_socket_tcp_low_delay(int fd) {
 161     int ret, tos, on;
 162
 163     assert(fd >= 0);
 164
 165     ret = pa_socket_low_delay(fd);
 166
 167     on = 1;
 168     tos = 0;
 169
 170 #if defined(SOL_TCP) || defined(IPPROTO_TCP)
 171 #if defined(SOL_TCP)
 172     if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 173 #else
 174     if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 175 #endif
 176         ret = -1;
 177 #endif
 178
 179 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || \
 180         defined(IPPROTO_IP))
 181     tos = IPTOS_LOWDELAY;
 182 #ifdef SOL_IP
 183     if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 184 #else
 185     if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 186 #endif
 187         ret = -1;
 188 #endif
 189
 190     return ret;
 191
 192 }
 193
 194 int pa_socket_set_rcvbuf(int fd, size_t l) {
 195     assert(fd >= 0);
 196
 197 /*     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void*)&l, sizeof(l)) < 0) { */
 198 /*         pa_log("SO_RCVBUF: %s", strerror(errno)); */
 199 /*         return -1; */
 200 /*     } */
 201
 202     return 0;
 203 }
 204
 205 int pa_socket_set_sndbuf(int fd, size_t l) {
 206     assert(fd >= 0);
 207
 208 /*     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void*)&l, sizeof(l)) < 0) { */
 209 /*         pa_log("SO_SNDBUF: %s", strerror(errno)); */
 210 /*         return -1; */
 211 /*     } */
 212
 213     return 0;
 214 }
 215
 216 #ifdef HAVE_SYS_UN_H
 217
 218 int pa_unix_socket_is_stale(const char *fn) {
 219     struct sockaddr_un sa;
 220     int fd = -1, ret = -1;
 221
 222     if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
 223         pa_log("socket(): %s", pa_cstrerror(errno));
 224         goto finish;
 225     }
 226
 227     sa.sun_family = AF_UNIX;
 228     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 229     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 230
 231     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 232         if (errno == ECONNREFUSED)
 233             ret = 1;
 234     } else
 235         ret = 0;
 236
 237 finish:
 238     if (fd >= 0)
 239         pa_close(fd);
 240
 241     return ret;
 242 }
 243
 244 int pa_unix_socket_remove_stale(const char *fn) {
 245     int r;
 246
 247     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 248         return errno != ENOENT ? -1 : 0;
 249
 250     if (!r)
 251         return 0;
 252
 253     /* Yes, here is a race condition. But who cares? */
 254     if (unlink(fn) < 0)
 255         return -1;
 256
 257     return 0;
 258 }
 259
 260 #else /* HAVE_SYS_UN_H */
 261
 262 int pa_unix_socket_is_stale(const char *fn) {
 263     return -1;
 264 }
 265
 266 int pa_unix_socket_remove_stale(const char *fn) {
 267     return -1;
 268 }
 269
 270 #endif /* HAVE_SYS_UN_H */