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 <polyp/xmalloc.h>
  63
  64 #include <polypcore/core-util.h>
  65 #include <polypcore/log.h>
  66
  67 #include "socket-util.h"
  68
  69 void pa_socket_peer_to_string(int fd, char *c, size_t l) {
  70     struct stat st;
  71
  72     assert(c && l && fd >= 0);
  73
  74 #ifndef OS_IS_WIN32
  75     if (fstat(fd, &st) < 0) {
  76         snprintf(c, l, "Invalid client fd");
  77         return;
  78     }
  79 #endif
  80
  81 #ifndef OS_IS_WIN32
  82     if (S_ISSOCK(st.st_mode)) {
  83 #endif
  84         union {
  85             struct sockaddr sa;
  86             struct sockaddr_in in;
  87 #ifdef HAVE_SYS_UN_H
  88             struct sockaddr_un un;
  89 #endif
  90         } sa;
  91         socklen_t sa_len = sizeof(sa);
  92
  93         if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
  94
  95             if (sa.sa.sa_family == AF_INET) {
  96                 uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
  97
  98                 snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
  99                          ip >> 24,
 100                          (ip >> 16) & 0xFF,
 101                          (ip >> 8) & 0xFF,
 102                          ip & 0xFF,
 103                          ntohs(sa.in.sin_port));
 104                 return;
 105 #ifdef HAVE_SYS_UN_H
 106             } else if (sa.sa.sa_family == AF_UNIX) {
 107                 snprintf(c, l, "UNIX socket client");
 108                 return;
 109 #endif
 110             }
 111
 112         }
 113 #ifndef OS_IS_WIN32
 114         snprintf(c, l, "Unknown network client");
 115         return;
 116     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
 117         snprintf(c, l, "STDIN/STDOUT client");
 118         return;
 119     }
 120 #endif /* OS_IS_WIN32 */
 121
 122     snprintf(c, l, "Unknown client");
 123 }
 124
 125 int pa_socket_low_delay(int fd) {
 126 #ifdef SO_PRIORITY
 127     int priority;
 128     assert(fd >= 0);
 129
 130     priority = 7;
 131     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, (void*)&priority, sizeof(priority)) < 0)
 132         return -1;
 133 #endif
 134
 135     return 0;
 136 }
 137
 138 int pa_socket_tcp_low_delay(int fd) {
 139     int ret, tos, on;
 140
 141     assert(fd >= 0);
 142
 143     ret = pa_socket_low_delay(fd);
 144
 145     on = 1;
 146     tos = 0;
 147
 148 #if defined(SOL_TCP) || defined(IPPROTO_TCP)
 149 #if defined(SOL_TCP)
 150     if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 151 #else
 152     if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 153 #endif
 154         ret = -1;
 155 #endif
 156
 157 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || \
 158         defined(IPPROTO_IP))
 159     tos = IPTOS_LOWDELAY;
 160 #ifdef SOL_IP
 161     if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 162 #else
 163     if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 164 #endif
 165         ret = -1;
 166 #endif
 167
 168     return ret;
 169
 170 }
 171
 172 int pa_socket_set_rcvbuf(int fd, size_t l) {
 173     assert(fd >= 0);
 174
 175 /*     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void*)&l, sizeof(l)) < 0) { */
 176 /*         pa_log(__FILE__": SO_RCVBUF: %s", strerror(errno)); */
 177 /*         return -1; */
 178 /*     } */
 179
 180     return 0;
 181 }
 182
 183 int pa_socket_set_sndbuf(int fd, size_t l) {
 184     assert(fd >= 0);
 185
 186 /*     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void*)&l, sizeof(l)) < 0) { */
 187 /*         pa_log(__FILE__": SO_SNDBUF: %s", strerror(errno)); */
 188 /*         return -1; */
 189 /*     } */
 190
 191     return 0;
 192 }
 193
 194 #ifdef HAVE_SYS_UN_H
 195
 196 int pa_unix_socket_is_stale(const char *fn) {
 197     struct sockaddr_un sa;
 198     int fd = -1, ret = -1;
 199
 200     if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
 201         pa_log(__FILE__": socket(): %s", strerror(errno));
 202         goto finish;
 203     }
 204
 205     sa.sun_family = AF_UNIX;
 206     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 207     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 208
 209     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 210         if (errno == ECONNREFUSED)
 211             ret = 1;
 212     } else
 213         ret = 0;
 214
 215 finish:
 216     if (fd >= 0)
 217         close(fd);
 218
 219     return ret;
 220 }
 221
 222 int pa_unix_socket_remove_stale(const char *fn) {
 223     int r;
 224
 225     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 226         return errno != ENOENT ? -1 : 0;
 227
 228     if (!r)
 229         return 0;
 230
 231     /* Yes, here is a race condition. But who cares? */
 232     if (unlink(fn) < 0)
 233         return -1;
 234
 235     return 0;
 236 }
 237
 238 #else /* HAVE_SYS_UN_H */
 239
 240 int pa_unix_socket_is_stale(const char *fn) {
 241     return -1;
 242 }
 243
 244 int pa_unix_socket_remove_stale(const char *fn) {
 245     return -1;
 246 }
 247
 248 #endif /* HAVE_SYS_UN_H */