src/pulsecore/parseaddr.c

   1 /***
   2   This file is part of PulseAudio.
   3
   4   Copyright 2004-2006 Lennart Poettering
   5
   6   PulseAudio is free software; you can redistribute it and/or modify
   7   it under the terms of the GNU Lesser General Public License as
   8   published by the Free Software Foundation; either version 2.1 of the
   9   License, or (at your option) any later version.
  10
  11   PulseAudio 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   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public
  17   License along with PulseAudio; 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 <string.h>
  27 #include <stdlib.h>
  28
  29 #include <pulse/xmalloc.h>
  30
  31 #include <pulsecore/core-util.h>
  32 #include <pulsecore/macro.h>
  33 #include <pulsecore/arpa-inet.h>
  34
  35 #include "parseaddr.h"
  36
  37 /* Parse addresses in one of the following forms:
  38  *    HOSTNAME
  39  *    HOSTNAME:PORT
  40  *    [HOSTNAME]
  41  *    [HOSTNAME]:PORT
  42  *
  43  *  Return a newly allocated string of the hostname and fill in *ret_port if specified  */
  44
  45 static char *parse_host(const char *s, uint16_t *ret_port) {
  46     pa_assert(s);
  47     pa_assert(ret_port);
  48
  49     if (*s == '[') {
  50         char *e;
  51         if (!(e = strchr(s+1, ']')))
  52             return NULL;
  53
  54         if (e[1] == ':') {
  55             uint32_t p;
  56
  57             if (pa_atou(e+2, &p) < 0)
  58                 return NULL;
  59
  60             *ret_port = (uint16_t) p;
  61         } else if (e[1] != 0)
  62             return NULL;
  63
  64         return pa_xstrndup(s+1, (size_t) (e-s-1));
  65     } else {
  66         char *e;
  67         uint32_t p;
  68
  69         if (!(e = strrchr(s, ':')))
  70             return pa_xstrdup(s);
  71
  72         if (pa_atou(e+1, &p) < 0)
  73             return NULL;
  74
  75         *ret_port = (uint16_t) p;
  76         return pa_xstrndup(s, (size_t) (e-s));
  77     }
  78 }
  79
  80 int pa_parse_address(const char *name, pa_parsed_address *ret_p) {
  81     const char *p;
  82
  83     pa_assert(name);
  84     pa_assert(ret_p);
  85
  86     memset(ret_p, 0, sizeof(pa_parsed_address));
  87     ret_p->type = PA_PARSED_ADDRESS_TCP_AUTO;
  88
  89     if (*name == '{') {
  90         char *id, *pfx;
  91
  92         /* The URL starts with a host id for detecting local connections */
  93         if (!(id = pa_machine_id()))
  94             return -1;
  95
  96         pfx = pa_sprintf_malloc("{%s}", id);
  97         pa_xfree(id);
  98
  99         if (!pa_startswith(name, pfx)) {
 100             pa_xfree(pfx);
 101             /* Not local */
 102             return -1;
 103         }
 104
 105         p = name + strlen(pfx);
 106         pa_xfree(pfx);
 107     } else
 108         p = name;
 109
 110     if (*p == '/')
 111         ret_p->type = PA_PARSED_ADDRESS_UNIX;
 112     else if (pa_startswith(p, "unix:")) {
 113         ret_p->type = PA_PARSED_ADDRESS_UNIX;
 114         p += sizeof("unix:")-1;
 115     } else if (pa_startswith(p, "tcp:")) {
 116         ret_p->type = PA_PARSED_ADDRESS_TCP4;
 117         p += sizeof("tcp:")-1;
 118     } else if (pa_startswith(p, "tcp4:")) {
 119         ret_p->type = PA_PARSED_ADDRESS_TCP4;
 120         p += sizeof("tcp4:")-1;
 121     } else if (pa_startswith(p, "tcp6:")) {
 122         ret_p->type = PA_PARSED_ADDRESS_TCP6;
 123         p += sizeof("tcp6:")-1;
 124     }
 125
 126     if (ret_p->type == PA_PARSED_ADDRESS_UNIX)
 127         ret_p->path_or_host = pa_xstrdup(p);
 128     else
 129         if (!(ret_p->path_or_host = parse_host(p, &ret_p->port)))
 130             return -1;
 131
 132     return 0;
 133 }
 134
 135 pa_bool_t pa_is_ip_address(const char *a) {
 136     char buf[INET6_ADDRSTRLEN];
 137
 138     pa_assert(a);
 139
 140     if (inet_pton(AF_INET6, a, buf) >= 1)
 141         return TRUE;
 142
 143     if (inet_pton(AF_INET, a, buf) >= 1)
 144         return TRUE;
 145
 146     return FALSE;
 147 }