git.meshlink.io Git - meshlink/blob - src/connection.c

   1 /*
   2     connection.c -- connection list management
   3     Copyright (C) 2000-2009 Guus Sliepen <guus@tinc-vpn.org>,
   4                   2000-2005 Ivo Timmermans
   5                   2008      Max Rijevski <maksuf@gmail.com>
   6
   7     This program is free software; you can redistribute it and/or modify
   8     it under the terms of the GNU General Public License as published by
   9     the Free Software Foundation; either version 2 of the License, or
  10     (at your option) any later version.
  11
  12     This program is distributed in the hope that it will be useful,
  13     but WITHOUT ANY WARRANTY; without even the implied warranty of
  14     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15     GNU General Public License for more details.
  16
  17     You should have received a copy of the GNU General Public License along
  18     with this program; if not, write to the Free Software Foundation, Inc.,
  19     51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  20 */
  21
  22 #include "system.h"
  23
  24 #include "splay_tree.h"
  25 #include "cipher.h"
  26 #include "conf.h"
  27 #include "list.h"
  28 #include "logger.h"
  29 #include "net.h"                                /* Don't ask. */
  30 #include "netutl.h"
  31 #include "subnet.h"
  32 #include "utils.h"
  33 #include "xalloc.h"
  34
  35 splay_tree_t *connection_tree;  /* Meta connections */
  36 connection_t *broadcast;
  37
  38 static int connection_compare(const connection_t *a, const connection_t *b) {
  39         return a < b ? -1 : a == b ? 0 : 1;
  40 }
  41
  42 void init_connections(void) {
  43         connection_tree = splay_alloc_tree((splay_compare_t) connection_compare, (splay_action_t) free_connection);
  44         broadcast = new_connection();
  45         broadcast->name = xstrdup("everyone");
  46         broadcast->hostname = xstrdup("BROADCAST");
  47 }
  48
  49 void exit_connections(void) {
  50         splay_delete_tree(connection_tree);
  51         free_connection(broadcast);
  52 }
  53
  54 connection_t *new_connection(void) {
  55         return xmalloc_and_zero(sizeof(connection_t));
  56 }
  57
  58 void free_connection(connection_t *c) {
  59         if(!c)
  60                 return;
  61
  62         if(c->name)
  63                 free(c->name);
  64
  65         if(c->hostname)
  66                 free(c->hostname);
  67
  68         cipher_close(&c->incipher);
  69         cipher_close(&c->outcipher);
  70
  71         if(c->hischallenge)
  72                 free(c->hischallenge);
  73
  74         if(c->config_tree)
  75                 exit_configuration(&c->config_tree);
  76
  77         if(c->buffer)
  78                 bufferevent_free(c->buffer);
  79
  80         if(event_initialized(&c->inevent))
  81                 event_del(&c->inevent);
  82
  83         free(c);
  84 }
  85
  86 void connection_add(connection_t *c) {
  87         splay_insert(connection_tree, c);
  88 }
  89
  90 void connection_del(connection_t *c) {
  91         splay_delete(connection_tree, c);
  92 }
  93
  94 int dump_connections(struct evbuffer *out) {
  95         splay_node_t *node;
  96         connection_t *c;
  97
  98         for(node = connection_tree->head; node; node = node->next) {
  99                 c = node->data;
 100                 if(evbuffer_add_printf(out,
 101                                    " %s at %s options %lx socket %d status %04x\n",
 102                                    c->name, c->hostname, c->options, c->socket,
 103                                    bitfield_to_int(&c->status, sizeof c->status)) == -1)
 104                         return errno;
 105         }
 106
 107         return 0;
 108 }
 109
 110 bool read_connection_config(connection_t *c) {
 111         char *fname;
 112         int x;
 113
 114         xasprintf(&fname, "%s/hosts/%s", confbase, c->name);
 115         x = read_config_file(c->config_tree, fname);
 116         free(fname);
 117
 118         return x == 0;
 119 }