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 #ifdef HAVE_ARPA_INET_H
  60 #include <arpa/inet.h>
  61 #endif
  62
  63 #ifndef HAVE_INET_NTOP
  64 #include "inet_ntop.h"
  65 #endif
  66
  67 #include "winsock.h"
  68
  69 #include <polyp/xmalloc.h>
  70
  71 #include <polypcore/core-error.h>
  72 #include <polypcore/core-util.h>
  73 #include <polypcore/log.h>
  74
  75 #include "socket-util.h"
  76
  77 void pa_socket_peer_to_string(int fd, char *c, size_t l) {
  78     struct stat st;
  79
  80     assert(c && l && fd >= 0);
  81
  82 #ifndef OS_IS_WIN32
  83     if (fstat(fd, &st) < 0) {
  84         snprintf(c, l, "Invalid client fd");
  85         return;
  86     }
  87 #endif
  88
  89 #ifndef OS_IS_WIN32
  90     if (S_ISSOCK(st.st_mode)) {
  91 #endif
  92         union {
  93             struct sockaddr sa;
  94             struct sockaddr_in in;
  95             struct sockaddr_in6 in6;
  96 #ifdef HAVE_SYS_UN_H
  97             struct sockaddr_un un;
  98 #endif
  99         } sa;
 100         socklen_t sa_len = sizeof(sa);
 101
 102         if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
 103
 104             if (sa.sa.sa_family == AF_INET) {
 105                 uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
 106
 107                 snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
 108                          ip >> 24,
 109                          (ip >> 16) & 0xFF,
 110                          (ip >> 8) & 0xFF,
 111                          ip & 0xFF,
 112                          ntohs(sa.in.sin_port));
 113                 return;
 114             } else if (sa.sa.sa_family == AF_INET6) {
 115                 char buf[INET6_ADDRSTRLEN];
 116                 const char *res;
 117
 118                 res = inet_ntop(AF_INET6, &sa.in6.sin6_addr, buf, sizeof(buf));
 119                 if (res) {
 120                     snprintf(c, l, "TCP/IP client from [%s]:%u", buf, ntohs(sa.in6.sin6_port));
 121                     return;
 122                 }
 123 #ifdef HAVE_SYS_UN_H
 124             } else if (sa.sa.sa_family == AF_UNIX) {
 125                 snprintf(c, l, "UNIX socket client");
 126                 return;
 127 #endif
 128             }
 129
 130         }
 131 #ifndef OS_IS_WIN32
 132         snprintf(c, l, "Unknown network client");
 133         return;
 134     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
 135         snprintf(c, l, "STDIN/STDOUT client");
 136         return;
 137     }
 138 #endif /* OS_IS_WIN32 */
 139
 140     snprintf(c, l, "Unknown client");
 141 }
 142
 143 int pa_socket_low_delay(int fd) {
 144 #ifdef SO_PRIORITY
 145     int priority;
 146     assert(fd >= 0);
 147
 148     priority = 7;
 149     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, (void*)&priority, sizeof(priority)) < 0)
 150         return -1;
 151 #endif
 152
 153     return 0;
 154 }
 155
 156 int pa_socket_tcp_low_delay(int fd) {
 157     int ret, tos, on;
 158
 159     assert(fd >= 0);
 160
 161     ret = pa_socket_low_delay(fd);
 162
 163     on = 1;
 164     tos = 0;
 165
 166 #if defined(SOL_TCP) || defined(IPPROTO_TCP)
 167 #if defined(SOL_TCP)
 168     if (setsockopt(fd, SOL_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 169 #else
 170     if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, (void*)&on, sizeof(on)) < 0)
 171 #endif
 172         ret = -1;
 173 #endif
 174
 175 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || \
 176         defined(IPPROTO_IP))
 177     tos = IPTOS_LOWDELAY;
 178 #ifdef SOL_IP
 179     if (setsockopt(fd, SOL_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 180 #else
 181     if (setsockopt(fd, IPPROTO_IP, IP_TOS, (void*)&tos, sizeof(tos)) < 0)
 182 #endif
 183         ret = -1;
 184 #endif
 185
 186     return ret;
 187
 188 }
 189
 190 int pa_socket_set_rcvbuf(int fd, size_t l) {
 191     assert(fd >= 0);
 192
 193 /*     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, (void*)&l, sizeof(l)) < 0) { */
 194 /*         pa_log(__FILE__": SO_RCVBUF: %s", strerror(errno)); */
 195 /*         return -1; */
 196 /*     } */
 197
 198     return 0;
 199 }
 200
 201 int pa_socket_set_sndbuf(int fd, size_t l) {
 202     assert(fd >= 0);
 203
 204 /*     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, (void*)&l, sizeof(l)) < 0) { */
 205 /*         pa_log(__FILE__": SO_SNDBUF: %s", strerror(errno)); */
 206 /*         return -1; */
 207 /*     } */
 208
 209     return 0;
 210 }
 211
 212 #ifdef HAVE_SYS_UN_H
 213
 214 int pa_unix_socket_is_stale(const char *fn) {
 215     struct sockaddr_un sa;
 216     int fd = -1, ret = -1;
 217
 218     if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
 219         pa_log(__FILE__": socket(): %s", pa_cstrerror(errno));
 220         goto finish;
 221     }
 222
 223     sa.sun_family = AF_UNIX;
 224     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 225     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 226
 227     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 228         if (errno == ECONNREFUSED)
 229             ret = 1;
 230     } else
 231         ret = 0;
 232
 233 finish:
 234     if (fd >= 0)
 235         close(fd);
 236
 237     return ret;
 238 }
 239
 240 int pa_unix_socket_remove_stale(const char *fn) {
 241     int r;
 242
 243     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 244         return errno != ENOENT ? -1 : 0;
 245
 246     if (!r)
 247         return 0;
 248
 249     /* Yes, here is a race condition. But who cares? */
 250     if (unlink(fn) < 0)
 251         return -1;
 252
 253     return 0;
 254 }
 255
 256 #else /* HAVE_SYS_UN_H */
 257
 258 int pa_unix_socket_is_stale(const char *fn) {
 259     return -1;
 260 }
 261
 262 int pa_unix_socket_remove_stale(const char *fn) {
 263     return -1;
 264 }
 265
 266 #endif /* HAVE_SYS_UN_H */