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/un.h>
  34 #include <netinet/in.h>
  35 #include <fcntl.h>
  36 #include <unistd.h>
  37 #include <sys/types.h>
  38 #include <netinet/tcp.h>
  39 #include <netinet/ip.h>
  40
  41 #include "socket-util.h"
  42 #include "util.h"
  43 #include "xmalloc.h"
  44 #include "log.h"
  45
  46 void pa_socket_peer_to_string(int fd, char *c, size_t l) {
  47     struct stat st;
  48
  49     assert(c && l && fd >= 0);
  50
  51     if (fstat(fd, &st) < 0) {
  52         snprintf(c, l, "Invalid client fd");
  53         return;
  54     }
  55
  56     if (S_ISSOCK(st.st_mode)) {
  57         union {
  58             struct sockaddr sa;
  59             struct sockaddr_in in;
  60             struct sockaddr_un un;
  61         } sa;
  62         socklen_t sa_len = sizeof(sa);
  63
  64         if (getpeername(fd, &sa.sa, &sa_len) >= 0) {
  65
  66             if (sa.sa.sa_family == AF_INET) {
  67                 uint32_t ip = ntohl(sa.in.sin_addr.s_addr);
  68
  69                 snprintf(c, l, "TCP/IP client from %i.%i.%i.%i:%u",
  70                          ip >> 24,
  71                          (ip >> 16) & 0xFF,
  72                          (ip >> 8) & 0xFF,
  73                          ip & 0xFF,
  74                          ntohs(sa.in.sin_port));
  75                 return;
  76             } else if (sa.sa.sa_family == AF_LOCAL) {
  77                 snprintf(c, l, "UNIX socket client");
  78                 return;
  79             }
  80
  81         }
  82         snprintf(c, l, "Unknown network client");
  83         return;
  84     } else if (S_ISCHR(st.st_mode) && (fd == 0 || fd == 1)) {
  85         snprintf(c, l, "STDIN/STDOUT client");
  86         return;
  87     }
  88
  89     snprintf(c, l, "Unknown client");
  90 }
  91
  92 int pa_socket_low_delay(int fd) {
  93     int priority;
  94     assert(fd >= 0);
  95
  96     priority = 7;
  97     if (setsockopt(fd, SOL_SOCKET, SO_PRIORITY, &priority, sizeof(priority)) < 0)
  98         return -1;
  99
 100     return 0;
 101 }
 102
 103 int pa_socket_tcp_low_delay(int fd) {
 104     int ret, tos, on;
 105
 106     assert(fd >= 0);
 107
 108     ret = pa_socket_low_delay(fd);
 109
 110     on = 1;
 111     if (setsockopt(fd, SOL_TCP, TCP_NODELAY, &on, sizeof(on)) < 0)
 112         ret = -1;
 113
 114     tos = IPTOS_LOWDELAY;
 115     if (setsockopt(fd, SOL_IP, IP_TOS, &tos, sizeof(tos)) < 0)
 116         ret = -1;
 117
 118     return ret;
 119
 120 }
 121
 122 int pa_socket_set_rcvbuf(int fd, size_t l) {
 123     assert(fd >= 0);
 124
 125 /*     if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF, &l, sizeof(l)) < 0) { */
 126 /*         pa_log(__FILE__": SO_RCVBUF: %s\n", strerror(errno)); */
 127 /*         return -1; */
 128 /*     } */
 129
 130     return 0;
 131 }
 132
 133 int pa_socket_set_sndbuf(int fd, size_t l) {
 134     assert(fd >= 0);
 135
 136 /*     if (setsockopt(fd, SOL_SOCKET, SO_SNDBUF, &l, sizeof(l)) < 0) { */
 137 /*         pa_log(__FILE__": SO_SNDBUF: %s\n", strerror(errno)); */
 138 /*         return -1; */
 139 /*     } */
 140
 141     return 0;
 142 }
 143
 144 int pa_unix_socket_is_stale(const char *fn) {
 145     struct sockaddr_un sa;
 146     int fd = -1, ret = -1;
 147
 148     if ((fd = socket(PF_LOCAL, SOCK_STREAM, 0)) < 0) {
 149         pa_log(__FILE__": socket(): %s\n", strerror(errno));
 150         goto finish;
 151     }
 152
 153     sa.sun_family = AF_LOCAL;
 154     strncpy(sa.sun_path, fn, sizeof(sa.sun_path)-1);
 155     sa.sun_path[sizeof(sa.sun_path) - 1] = 0;
 156
 157     if (connect(fd, (struct sockaddr*) &sa, sizeof(sa)) < 0) {
 158         if (errno == ECONNREFUSED)
 159             ret = 1;
 160     } else
 161         ret = 0;
 162
 163 finish:
 164     if (fd >= 0)
 165         close(fd);
 166
 167     return ret;
 168 }
 169
 170 int pa_unix_socket_remove_stale(const char *fn) {
 171     int r;
 172
 173     if ((r = pa_unix_socket_is_stale(fn)) < 0)
 174         return errno != ENOENT ? -1 : 0;
 175
 176     if (!r)
 177         return 0;
 178
 179     /* Yes, here is a race condition. But who cares? */
 180     if (unlink(fn) < 0)
 181         return -1;
 182
 183     return 0;
 184 }
 185
 186 int pa_unix_socket_make_secure_dir(const char *fn) {
 187     int ret = -1;
 188     char *slash, *dir = pa_xstrdup(fn);
 189
 190     if (!(slash = strrchr(dir, '/')))
 191         goto finish;
 192     *slash = 0;
 193
 194     if (pa_make_secure_dir(dir) < 0)
 195         goto finish;
 196
 197     ret = 0;
 198
 199 finish:
 200     pa_xfree(dir);
 201     return ret;
 202 }
 203
 204 int pa_unix_socket_remove_secure_dir(const char *fn) {
 205     int ret = -1;
 206     char *slash, *dir = pa_xstrdup(fn);
 207
 208     if (!(slash = strrchr(dir, '/')))
 209         goto finish;
 210     *slash = 0;
 211
 212     if (rmdir(dir) < 0)
 213         goto finish;
 214
 215     ret = 0;
 216
 217 finish:
 218     pa_xfree(dir);
 219     return ret;
 220 }
 221