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

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