code.delx.au - pulseaudio/blob - polyp/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 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 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 <sys/un.h>
  35 #include <netinet/in.h>
  36 #include <fcntl.h>
  37 #include <unistd.h>
  38 #include <netinet/in_systm.h>
  39 #include <netinet/tcp.h>
  40 #include <netinet/ip.h>
  41 #include <sys/socket.h>
  42 #include <sys/stat.h>
  43 #include <netdb.h>
  44
  45 #include "socket-util.h"
  46 #include "util.h"
  47 #include "xmalloc.h"
  48 #include "log.h"
  49
  50 void pa_socket_peer_to_string(int fd, char *c, size_t l) {
  51     struct stat st;
  52
  53     assert(c && l && fd >= 0);
  54
  55     if (fstat(fd, &st) < 0) {
  56         snprintf(c, l, "Invalid client fd");
  57         return;
  58     }
  59
  60     if (S_ISSOCK(st.st_mode)) {
  61         union {
  62             struct sockaddr sa;
  63             struct sockaddr_in in;
  64             struct sockaddr_un un;
  65         } sa;
  66         socklen_t sa_len = sizeof(sa);
  67
  68         if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
  69
  70             if (sa.sa.sa_family == AF_INET) {
  71                 uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
  72
  73                 snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
  74                          ip >> 24,
  75                          (ip >> 16) & 0xFF,
  76                          (ip >> 8) & 0xFF,
  77                          ip & 0xFF,
  78                          ntohs(sa.in.sin_port));
  79                 return;
  80             } else if (sa.sa.sa_family == AF_LOCAL) {
  81                 snprintf(c, l, "UNIX socket client");
  82                 return;
  83             }
  84
  85         }
  86         snprintf(c, l, "Unknown network client");
  87         return;
  88     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
  89         snprintf(c, l, "STDIN/STDOUT client");
  90         return;
  91     }
  92
  93     snprintf(c, l, "Unknown client");
  94 }
  95
  96 int pa_socket_low_delay(int fd) {
  97     int priority;
  98     assert(fd >= 0);
  99
 100 #ifdef SO_PRIORITY
 101     priority = 7;
 102     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &priority, sizeof(priority)) < 0)
 103         return -1;
 104 #endif
 105
 106     return 0;
 107 }
 108
 109 int pa_socket_tcp_low_delay(int fd) {
 110     int ret, tos, on;
 111
 112     assert(fd >= 0);
 113
 114     ret = pa_socket_low_delay(fd);
 115
 116     on = 1;
 117 #if defined(SOL_TCP) || defined(IPPROTO_TCP)
 118 #if defined(SOL_TCP)
 119     if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
 120 #else
 121     if (setsockopt(fd, IPPROTO_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
 122 #endif
 123         ret = -1;
 124 #endif
 125
 126 #if defined(IPTOS_LOWDELAY) && defined(IP_TOS) && (defined(SOL_IP) || \
 127         defined(IPPROTO_IP))
 128     tos = IPTOS_LOWDELAY;
 129 #ifdef SOL_IP
 130     if (setsockopt(fd, SOL_IP, IP_TOS, &tos, sizeof(tos)) < 0)
 131 #else
 132     if (setsockopt(fd, IPPROTO_IP, IP_TOS, &tos, sizeof(tos)) < 0)
 133 #endif
 134         ret = -1;
 135 #endif
 136
 137     return ret;
 138
 139 }
 140
 141 int pa_socket_set_rcvbuf(int fd, size_t l) {
 142     assert(fd >= 0);
 143
 144 /*     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &l, sizeof(l)) < 0) { */
 145 /*         pa_log(__FILE__": SO_RCVBUF: %s\n", strerror(errno)); */
 146 /*         return -1; */
 147 /*     } */
 148
 149     return 0;
 150 }
 151
 152 int pa_socket_set_sndbuf(int fd, size_t l) {
 153     assert(fd >= 0);
 154
 155 /*     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &l, sizeof(l)) < 0) { */
 156 /*         pa_log(__FILE__": SO_SNDBUF: %s\n", strerror(errno)); */
 157 /*         return -1; */
 158 /*     } */
 159
 160     return 0;
 161 }
 162
 163 int pa_unix_socket_is_stale(const char *fn) {
 164     struct sockaddr_un sa;
 165     int fd = -1, ret = -1;
 166
 167     if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
 168         pa_log(__FILE__": socket(): %s\n", strerror(errno));
 169         goto finish;
 170     }
 171
 172     sa.sun_family = AF_LOCAL;
 173     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 174     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 175
 176     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 177         if (errno == ECONNREFUSED)
 178             ret = 1;
 179     } else
 180         ret = 0;
 181
 182 finish:
 183     if (fd >= 0)
 184         close(fd);
 185
 186     return ret;
 187 }
 188
 189 int pa_unix_socket_remove_stale(const char *fn) {
 190     int r;
 191
 192     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 193         return errno != ENOENT ? -1 : 0;
 194
 195     if (!r)
 196         return 0;
 197
 198     /* Yes, here is a race condition. But who cares? */
 199     if (unlink(fn) < 0)
 200         return -1;
 201
 202     return 0;
 203 }
 204
 205 int pa_unix_socket_make_secure_dir(const char *fn) {
 206     int ret = -1;
 207     char *slash, *dir = pa_xstrdup(fn);
 208
 209     if (!(slash = strrchr(dir, '/')))
 210         goto finish;
 211     *slash = 0;
 212
 213     if (pa_make_secure_dir(dir) < 0)
 214         goto finish;
 215
 216     ret = 0;
 217
 218 finish:
 219     pa_xfree(dir);
 220     return ret;
 221 }
 222
 223 int pa_unix_socket_remove_secure_dir(const char *fn) {
 224     int ret = -1;
 225     char *slash, *dir = pa_xstrdup(fn);
 226
 227     if (!(slash = strrchr(dir, '/')))
 228         goto finish;
 229     *slash = 0;
 230
 231     if (rmdir(dir) < 0)
 232         goto finish;
 233
 234     ret = 0;
 235
 236 finish:
 237     pa_xfree(dir);
 238     return ret;
 239 }
 240
 241 struct sockaddr *pa_resolve_server(const char *server, size_t *len, uint16_t nport) {
 242     struct sockaddr *sa;
 243     struct addrinfo hints, *result = NULL;
 244     char *port, host[256], tmp[16];
 245     assert(server && len);
 246
 247     snprintf(host, sizeof(host), "%s", server);
 248     host[strcspn(host, ":")] = 0;
 249
 250     if ((port = strrchr(server, ':')))
 251         port++;
 252
 253     if (!port)
 254         snprintf(port = tmp, sizeof(tmp), "%u", nport);
 255
 256     memset(&hints, 0, sizeof(hints));
 257     hints.ai_family = PF_UNSPEC;
 258     hints.ai_socktype = SOCK_STREAM;
 259     hints.ai_protocol = 0;
 260
 261     if (getaddrinfo(host, port, &hints, &result) != 0)
 262         return NULL;
 263     assert(result);
 264
 265     sa = pa_xmalloc(*len = result->ai_addrlen);
 266     memcpy(sa, result->ai_addr, *len);
 267
 268     freeaddrinfo(result);
 269
 270     return sa;
 271 }
 272