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

   1 /*
   2  * This file is part of DisOrder
   3  * Copyright (C) 2004-7, 2009, 2011-13 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 #if HAVE_NETINET_IN_H
  25 # include <netinet/in.h>
  26 #endif
  27 #if HAVE_SYS_UN_H
  28 # include <sys/un.h>
  29 #endif
  30 #include <errno.h>
  31 #if HAVE_NETDB_H
  32 # include <netdb.h>
  33 #endif
  34 #if HAVE_UNISTD_H
  35 # include <unistd.h>
  36 #endif
  37 #if HAVE_WS2TCPIP_H
  38 # include <Ws2tcpip.h>
  39 #endif
  40
  41 #include "log.h"
  42 #include "configuration.h"
  43 #include "client-common.h"
  44 #include "addr.h"
  45 #include "mem.h"
  46
  47 /** @brief Figure out what address to connect to
  48  * @param c Configuration to honor
  49  * @param flags Flags to guide the choice
  50  * @param sap Where to store pointer to sockaddr
  51  * @param namep Where to store socket name
  52  * @return Socket length, or (socklen_t)-1
  53  */
  54 socklen_t disorder_find_server(struct config *c, unsigned flags,
  55                                struct sockaddr **sap, char **namep) {
  56   struct sockaddr *sa;
  57 #if !_WIN32
  58   struct sockaddr_un su;
  59 #endif
  60   struct resolved *res;
  61   size_t nres;
  62   char *name = NULL;
  63   socklen_t len;
  64
  65   if(c->connect.af != -1) {
  66     if(netaddress_resolve(&c->connect, 0, SOCK_STREAM, &res, &nres))
  67       return -1;
  68     sa = res->sa;
  69     len = res->len;
  70   } else {
  71 #if _WIN32
  72     disorder_fatal(0, "local connections are not supported on Windows");
  73 #else
  74     /* use the private socket if possible (which it should be) */
  75     if (!(flags & DISORDER_FS_NOTPRIV)) {
  76       name = config_get_file2(c, "private/socket");
  77       if(access(name, R_OK) != 0) {
  78         xfree(name);
  79         name = NULL;
  80       }
  81     }
  82     if(!name)
  83       name = config_get_file2(c, "socket");
  84     if(strlen(name) >= sizeof su.sun_path) {
  85       disorder_error(0, "socket path is too long");
  86       return -1;
  87     }
  88     memset(&su, 0, sizeof su);
  89     su.sun_family = AF_UNIX;
  90     strcpy(su.sun_path, name);
  91     sa = (struct sockaddr *)&su;
  92     len = sizeof su;
  93     res = 0;
  94     xfree(name);
  95 #endif
  96   }
  97   *sap = xmalloc_noptr(len);
  98   memcpy(*sap, sa, len);
  99   if(namep)
 100     *namep = format_sockaddr(sa);
 101   if(res)
 102     netaddress_free_resolved(res, nres);
 103   return len;
 104 }
 105
 106 /** @brief Figure out what address to connect to
 107  * @param c Configuration to honor
 108  * @param sap Where to store pointer to sockaddr
 109  * @param namep Where to store socket name
 110  * @return Socket length, or (socklen_t)-1
 111  *
 112  * The function disorder_find_server() isn't a namespace violation, and has
 113  * more functionality.  This function is equivalent, to disorder_find_server()
 114  * with a zero @c flags argument.
 115  */
 116 socklen_t find_server(struct config *c,
 117                       struct sockaddr **sap, char **namep) {
 118   return disorder_find_server(c, 0, sap, namep);
 119 }
 120
 121 const char disorder__body[1];
 122 const char disorder__list[1];
 123 const char disorder__integer[1];
 124 const char disorder__time[1];
 125
 126 /*
 127 Local Variables:
 128 c-basic-offset:2
 129 comment-column:40
 130 fill-column:79
 131 indent-tabs-mode:nil
 132 End:
 133 */