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 #ifdef HAVE_ARPA_INET_H
  30 #include <arpa/inet.h>
  31 #endif
  32
  33 #include <pulse/xmalloc.h>
  34 #include <pulse/util.h>
  35
  36 #include <pulsecore/core-util.h>
  37 #include <pulsecore/macro.h>
  38 #include <pulsecore/inet_pton.h>
  39
  40 #include "parseaddr.h"
  41
  42 /* Parse addresses in one of the following forms:
  43  *    HOSTNAME
  44  *    HOSTNAME:PORT
  45  *    [HOSTNAME]
  46  *    [HOSTNAME]:PORT
  47  *
  48  *  Return a newly allocated string of the hostname and fill in *ret_port if specified  */
  49
  50 static char *parse_host(const char *s, uint16_t *ret_port) {
  51     pa_assert(s);
  52     pa_assert(ret_port);
  53
  54     if (*s == '[') {
  55         char *e;
  56         if (!(e = strchr(s+1, ']')))
  57             return NULL;
  58
  59         if (e[1] == ':') {
  60             uint32_t p;
  61
  62             if (pa_atou(e+2, &p) < 0)
  63                 return NULL;
  64
  65             *ret_port = (uint16_t) p;
  66         } else if (e[1] != 0)
  67             return NULL;
  68
  69         return pa_xstrndup(s+1, (size_t) (e-s-1));
  70     } else {
  71         char *e;
  72         uint32_t p;
  73
  74         if (!(e = strrchr(s, ':')))
  75             return pa_xstrdup(s);
  76
  77         if (pa_atou(e+1, &p) < 0)
  78             return NULL;
  79
  80         *ret_port = (uint16_t) p;
  81         return pa_xstrndup(s, (size_t) (e-s));
  82     }
  83 }
  84
  85 int pa_parse_address(const char *name, pa_parsed_address *ret_p) {
  86     const char *p;
  87
  88     pa_assert(name);
  89     pa_assert(ret_p);
  90
  91     memset(ret_p, 0, sizeof(pa_parsed_address));
  92     ret_p->type = PA_PARSED_ADDRESS_TCP_AUTO;
  93
  94     if (*name == '{') {
  95         char *id, *pfx;
  96
  97         /* The URL starts with a host id for detecting local connections */
  98         if (!(id = pa_machine_id()))
  99             return -1;
 100
 101         pfx = pa_sprintf_malloc("{%s}", id);
 102         pa_xfree(id);
 103
 104         if (!pa_startswith(name, pfx)) {
 105             pa_xfree(pfx);
 106             /* Not local */
 107             return -1;
 108         }
 109
 110         p = name + strlen(pfx);
 111         pa_xfree(pfx);
 112     } else
 113         p = name;
 114
 115     if (*p == '/')
 116         ret_p->type = PA_PARSED_ADDRESS_UNIX;
 117     else if (pa_startswith(p, "unix:")) {
 118         ret_p->type = PA_PARSED_ADDRESS_UNIX;
 119         p += sizeof("unix:")-1;
 120     } else if (pa_startswith(p, "tcp:")) {
 121         ret_p->type = PA_PARSED_ADDRESS_TCP4;
 122         p += sizeof("tcp:")-1;
 123     } else if (pa_startswith(p, "tcp4:")) {
 124         ret_p->type = PA_PARSED_ADDRESS_TCP4;
 125         p += sizeof("tcp4:")-1;
 126     } else if (pa_startswith(p, "tcp6:")) {
 127         ret_p->type = PA_PARSED_ADDRESS_TCP6;
 128         p += sizeof("tcp6:")-1;
 129     }
 130
 131     if (ret_p->type == PA_PARSED_ADDRESS_UNIX)
 132         ret_p->path_or_host = pa_xstrdup(p);
 133     else
 134         if (!(ret_p->path_or_host = parse_host(p, &ret_p->port)))
 135             return -1;
 136
 137     return 0;
 138 }
 139
 140 pa_bool_t pa_is_ip_address(const char *a) {
 141     char buf[INET6_ADDRSTRLEN];
 142
 143     pa_assert(a);
 144
 145     if (inet_pton(AF_INET6, a, buf) >= 1)
 146         return TRUE;
 147
 148     if (inet_pton(AF_INET, a, buf) >= 1)
 149         return TRUE;
 150
 151     return FALSE;
 152 }