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