src/ircd_sock.c

   1 /* ircd_sock.c - NextIRCd
   2  * Copyright (C) 2012-2013  Philipp Kreil (pk910)
   3  *
   4  * This program is free software: you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation, either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include "ircd_config.h"
  19 #include "ircd_sock.h"
  20 #include "ircd_client.h"
  21 #include "ircd_parse.h"
  22 #include "ircd_auth.h"
  23 #include "struct_connection.h"
  24
  25 #include "IOHandler/IOSockets.h"
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <stdio.h> // @debug
  30
  31 static struct Connection *sockets_listening = NULL;
  32 static struct Connection *sockets_first = NULL;
  33 static struct Connection *sockets_last = NULL;
  34
  35 static CONFRELOAD_CALLBACK(sockets_config_reload);
  36 static IOSOCKET_CALLBACK(sockets_iohandler_callback);
  37 static void sockets_free_connection(struct Connection *sock);
  38
  39 void init_sockets() {
  40         reload_config_callback(sockets_config_reload);
  41         sockets_config_reload(); /* open all listening sockets */
  42 }
  43
  44
  45 static void sockets_append_list(struct Connection *conn) {
  46         if(conn->listening) {
  47                 conn->next = sockets_listening;
  48                 sockets_listening = conn;
  49         } else {
  50                 conn->next = NULL;
  51                 conn->prev = sockets_last;
  52                 if(sockets_last)
  53                         sockets_last->next = conn;
  54                 sockets_last = conn;
  55                 if(!sockets_first)
  56                         sockets_first = conn;
  57         }
  58 }
  59
  60 static void sockets_remove_list(struct Connection *conn) {
  61         if(conn->listening) {
  62                 struct Connection *prev;
  63                 if(sockets_listening == conn)
  64                         sockets_listening = conn->next;
  65                 else {
  66                         for(prev = sockets_listening; prev; prev = prev->next) {
  67                                 if(prev->next == conn)
  68                                         break;
  69                         }
  70                         if(prev)
  71                                 prev->next = conn->next;
  72                 }
  73         } else {
  74                 if(conn->next)
  75                         conn->next->prev = conn->prev;
  76                 else
  77                         sockets_last = conn->prev;
  78                 if(conn->prev)
  79                         conn->prev->next = conn->next;
  80                 else
  81                         sockets_first = conn->next;
  82         }
  83 }
  84
  85 static void sockets_free_connection(struct Connection *conn) {
  86     free(conn);
  87 }
  88
  89 static void sockets_close_listening() {
  90         struct Connection *conn;
  91         while((conn = sockets_listening)) {
  92                 sockets_remove_list(conn);
  93                 iosocket_close(conn->socket);
  94                 sockets_free_connection(conn);
  95         }
  96 }
  97
  98 static int sockets_add_listening(struct ConfigPortObject *conf_port, char *bind_addr, char *certfile, char *keyfile, int socket_flags) {
  99     if(!conf_port)
 100         return -1;
 101
 102     struct IOSocket *iosock;
 103     if(!conf_port->secure)
 104         iosock = iosocket_listen_flags(bind_addr, conf_port->port, sockets_iohandler_callback, socket_flags);
 105     else if(certfile && keyfile)
 106         iosock = iosocket_listen_ssl_flags(bind_addr, conf_port->port, certfile, keyfile, sockets_iohandler_callback, socket_flags);
 107     else
 108         return -1;
 109
 110     if(!iosock)
 111         return -1;
 112
 113     printf("Added Listener Socket to Port %d.\n", conf_port->port); // @debug
 114
 115     struct Connection *connection;
 116     connection = calloc(1, sizeof(*connection));
 117     connection->listening = 1;
 118     connection->socket = iosock;
 119     connection->server = conf_port->server;
 120     iosock->data = connection;
 121     sockets_append_list(connection);
 122     return 0;
 123 }
 124
 125 static void sockets_accept_client(struct IOSocket *new_client, struct Connection *listener) {
 126     struct Connection *connection;
 127     connection = calloc(1, sizeof(*connection));
 128     connection->socket = new_client;
 129     connection->ssl = new_client->ssl;
 130
 131     new_client->parse_delimiter = 1;
 132     new_client->parse_empty = 0;
 133     strcpy((char*) new_client->delimiters, "\r\n");
 134
 135     connection->parent = listener;
 136     new_client->data = connection;
 137     sockets_append_list(connection);
 138
 139     auth_new(connection);
 140 }
 141
 142 static CONFRELOAD_CALLBACK(sockets_config_reload) {
 143         struct ConfigPortObject *conf_port;
 144         char *certfile, *keyfile;
 145
 146         sockets_close_listening();
 147
 148         certfile = NULL; /* to be continued */
 149         keyfile = NULL;
 150
 151         for(conf_port = global_config.ports; conf_port; conf_port = conf_port->next) {
 152         printf("port: %d\n", conf_port->port); // @debug
 153
 154         //add 2 listeners (IPv4 & IPv6) here
 155                 if(!conf_port->ip4only) {
 156             char *bind_addr = conf_port->bind_addr;
 157             if(!bind_addr)
 158                 bind_addr = "::1";
 159             sockets_add_listening(conf_port, bind_addr, certfile, keyfile, IOSOCKET_ADDR_IPV6);
 160         }
 161
 162                 if(!conf_port->ip6only) {
 163             char *bind_addr = conf_port->bind_addr;
 164             if(!bind_addr)
 165                 bind_addr = "0.0.0.0";
 166             sockets_add_listening(conf_port, bind_addr, certfile, keyfile, IOSOCKET_ADDR_IPV4);
 167         }
 168         }
 169 }
 170
 171 static IOSOCKET_CALLBACK(sockets_iohandler_callback) {
 172         struct Connection *connection = event->socket->data;
 173
 174     switch(event->type) {
 175     case IOSOCKETEVENT_ACCEPT:
 176         sockets_accept_client(event->data.accept_socket, connection);
 177         break;
 178
 179     case IOSOCKETEVENT_NOTCONNECTED:
 180     case IOSOCKETEVENT_CLOSED:
 181         sockets_remove_list(connection);
 182         if(connection->server) {
 183
 184         } else if(connection->authed) {
 185                         connection->data.client->conn = NULL;
 186             client_exit(connection->data.client, "Client disconnected.");
 187         } else {
 188                         connection->data.auth->conn = NULL;
 189                         auth_abort(connection->data.auth);
 190                 }
 191         sockets_free_connection(connection);
 192         break;
 193
 194     case IOSOCKETEVENT_DNSFAILED:
 195         if(connection->listening) {
 196             // listening socket could not be opened
 197         } else {
 198             sockets_remove_list(connection);
 199             client_disconnected(connection);
 200             sockets_free_connection(connection);
 201         }
 202         break;
 203
 204     case IOSOCKETEVENT_RECV:
 205         if(connection->server)
 206             parse_server_data(connection->data.server, event->data.recv_buf);
 207         else if(connection->authed)
 208             parse_client_data(connection->data.client, event->data.recv_str);
 209         else
 210                         parse_unauth_data(connection->data.auth, event->data.recv_str);
 211         break;
 212
 213     default:
 214         break;
 215     }
 216 }
 217
 218 void socket_send(struct Connection *conn, char *data, int len) {
 219     iosocket_send(conn->socket, data, len);
 220 }
 221
 222 void socket_printf(struct Connection *conn, const char *text, ...) {
 223     va_list arg_list;
 224         char sendBuf[512];
 225         int pos;
 226         sendBuf[0] = '\0';
 227         va_start(arg_list, text);
 228         pos = vsnprintf(sendBuf, 512 - 2, text, arg_list);
 229         va_end(arg_list);
 230         if (pos < 0 || pos > (512 - 2)) pos = CLIENT_MAXLEN - 2;
 231         sendBuf[pos] = '\n';
 232     sendBuf[pos+1] = '\0';
 233         iosocket_send(conn->socket, sendBuf, pos+1);
 234 }
 235
 236 void socket_close(struct Connection *conn) {
 237     iosocket_close(conn->socket);
 238     sockets_free_connection(conn);
 239 }
 240
 241 void socket_set_server(struct Connection *conn) {
 242         struct IOSocket *iosock = conn->socket;
 243         iosock->parse_delimiter = 0;
 244         conn->server = 1;
 245 }