mdw@git.distorted.org.uk Git - disorder/blob - lib/client-common.c

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2004, 2005, 2006, 2007, 2009 Richard Kettlewell
   4  *
   5  * This program is free software: you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation, either version 3 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  */
  18 /** @file lib/client-common.c
  19  * @brief Common code to client APIs
  20  */
  21
  22 #include "common.h"
  23
  24 #include <netinet/in.h>
  25 #include <sys/un.h>
  26 #include <errno.h>
  27 #include <netdb.h>
  28 #include <unistd.h>
  29
  30 #include "log.h"
  31 #include "configuration.h"
  32 #include "client-common.h"
  33 #include "addr.h"
  34 #include "mem.h"
  35
  36 /** @brief Figure out what address to connect to
  37  * @param c Configuration to honor
  38  * @param sap Where to store pointer to sockaddr
  39  * @param namep Where to store socket name
  40  * @return Socket length, or (socklen_t)-1
  41  */
  42 socklen_t find_server(struct config *c,
  43                       struct sockaddr **sap, char **namep) {
  44   struct sockaddr *sa;
  45   struct sockaddr_un su;
  46   struct addrinfo *res = 0;
  47   char *name = NULL;
  48   socklen_t len;
  49
  50   if(c->connect.af != -1) {
  51     res = netaddress_resolve(&c->connect, 0, IPPROTO_TCP);
  52     if(!res)
  53       return -1;
  54     sa = res->ai_addr;
  55     len = res->ai_addrlen;
  56   } else {
  57     if(getuid() == 0) {
  58       /* root will use the private socket if possible (which it should be) */
  59       name = config_get_file2(c, "private/socket");
  60       if(access(name, R_OK) != 0) {
  61         xfree(name);
  62         name = NULL;
  63       }
  64     }
  65     if(!name)
  66       name = config_get_file2(c, "socket");
  67     if(strlen(name) >= sizeof su.sun_path) {
  68       disorder_error(errno, "socket path is too long");
  69       return -1;
  70     }
  71     memset(&su, 0, sizeof su);
  72     su.sun_family = AF_UNIX;
  73     strcpy(su.sun_path, name);
  74     sa = (struct sockaddr *)&su;
  75     len = sizeof su;
  76     xfree(name);
  77   }
  78   *sap = xmalloc_noptr(len);
  79   memcpy(*sap, sa, len);
  80   if(namep)
  81     *namep = format_sockaddr(sa);
  82   if(res)
  83     freeaddrinfo(res);
  84   return len;
  85 }
  86
  87 const char disorder__body[1];
  88 const char disorder__list[1];
  89 const char disorder__integer[1];
  90 const char disorder__time[1];
  91
  92 /*
  93 Local Variables:
  94 c-basic-offset:2
  95 comment-column:40
  96 fill-column:79
  97 indent-tabs-mode:nil
  98 End:
  99 */