[0431ea1] | 1 | /********************************************************************\ |
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| 2 | * BitlBee -- An IRC to other IM-networks gateway * |
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| 3 | * * |
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[54879ab] | 4 | * Copyright 2002-2006 Wilmer van der Gaast and others * |
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[0431ea1] | 5 | \********************************************************************/ |
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| 6 | |
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| 7 | /* IPC - communication between BitlBee processes */ |
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| 8 | |
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| 9 | /* |
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| 10 | This program is free software; you can redistribute it and/or modify |
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| 11 | it under the terms of the GNU General Public License as published by |
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| 12 | the Free Software Foundation; either version 2 of the License, or |
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| 13 | (at your option) any later version. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, |
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| 16 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 18 | GNU General Public License for more details. |
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| 19 | |
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| 20 | You should have received a copy of the GNU General Public License with |
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| 21 | the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL; |
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| 22 | if not, write to the Free Software Foundation, Inc., 59 Temple Place, |
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| 23 | Suite 330, Boston, MA 02111-1307 USA |
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| 24 | */ |
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| 25 | |
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| 26 | #define BITLBEE_CORE |
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| 27 | #include "bitlbee.h" |
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| 28 | #include "ipc.h" |
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| 29 | #include "commands.h" |
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| 30 | |
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| 31 | GSList *child_list = NULL; |
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[54879ab] | 32 | static char *statefile = NULL; |
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[74c119d] | 33 | |
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[f73b969] | 34 | static void ipc_master_cmd_client( irc_t *data, char **cmd ) |
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[2face62] | 35 | { |
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[5e713f6] | 36 | /* Normally data points at an irc_t block, but for the IPC master |
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| 37 | this is different. We think this scary cast is better than |
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| 38 | creating a new command_t structure, just to make the compiler |
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| 39 | happy. */ |
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[2face62] | 40 | struct bitlbee_child *child = (void*) data; |
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| 41 | |
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[54879ab] | 42 | if( child && cmd[1] ) |
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[bd9b00f] | 43 | { |
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| 44 | child->host = g_strdup( cmd[1] ); |
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| 45 | child->nick = g_strdup( cmd[2] ); |
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| 46 | child->realname = g_strdup( cmd[3] ); |
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| 47 | } |
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[2face62] | 48 | |
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[54879ab] | 49 | if( g_strcasecmp( cmd[0], "CLIENT" ) == 0 ) |
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| 50 | ipc_to_children_str( "OPERMSG :Client connecting (PID=%d): %s@%s (%s)\r\n", |
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| 51 | child ? child->pid : -1, cmd[2], cmd[1], cmd[3] ); |
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[2face62] | 52 | } |
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| 53 | |
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[f73b969] | 54 | static void ipc_master_cmd_die( irc_t *data, char **cmd ) |
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[0431ea1] | 55 | { |
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[74c119d] | 56 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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| 57 | ipc_to_children_str( "DIE\r\n" ); |
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| 58 | |
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[13caf0a] | 59 | bitlbee_shutdown( NULL ); |
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[0431ea1] | 60 | } |
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| 61 | |
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[f73b969] | 62 | void ipc_master_cmd_rehash( irc_t *data, char **cmd ) |
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[0431ea1] | 63 | { |
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[f4a5940] | 64 | runmode_t oldmode; |
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| 65 | |
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| 66 | oldmode = global.conf->runmode; |
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| 67 | |
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| 68 | g_free( global.conf ); |
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| 69 | global.conf = conf_load( 0, NULL ); |
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| 70 | |
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| 71 | if( global.conf->runmode != oldmode ) |
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| 72 | { |
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| 73 | log_message( LOGLVL_WARNING, "Can't change RunMode setting at runtime, restoring original setting" ); |
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| 74 | global.conf->runmode = oldmode; |
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| 75 | } |
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| 76 | |
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| 77 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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| 78 | ipc_to_children( cmd ); |
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[0431ea1] | 79 | } |
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| 80 | |
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[54879ab] | 81 | void ipc_master_cmd_restart( irc_t *data, char **cmd ) |
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| 82 | { |
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| 83 | struct bitlbee_child *child = (void*) data; |
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| 84 | |
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| 85 | if( global.conf->runmode != RUNMODE_FORKDAEMON ) |
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| 86 | { |
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| 87 | /* Tell child that this is unsupported. */ |
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| 88 | return; |
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| 89 | } |
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| 90 | |
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| 91 | global.restart = -1; |
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| 92 | bitlbee_shutdown( NULL ); |
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| 93 | } |
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| 94 | |
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[0431ea1] | 95 | static const command_t ipc_master_commands[] = { |
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[2face62] | 96 | { "client", 3, ipc_master_cmd_client, 0 }, |
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[54879ab] | 97 | { "hello", 0, ipc_master_cmd_client, 0 }, |
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[0431ea1] | 98 | { "die", 0, ipc_master_cmd_die, 0 }, |
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[f4a5940] | 99 | { "wallops", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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| 100 | { "lilo", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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[2face62] | 101 | { "opermsg", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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[f4a5940] | 102 | { "rehash", 0, ipc_master_cmd_rehash, 0 }, |
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[48721c3] | 103 | { "kill", 2, NULL, IPC_CMD_TO_CHILDREN }, |
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[54879ab] | 104 | { "restart", 0, ipc_master_cmd_restart, 0 }, |
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[0431ea1] | 105 | { NULL } |
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| 106 | }; |
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| 107 | |
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[74c119d] | 108 | |
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[f73b969] | 109 | static void ipc_child_cmd_die( irc_t *irc, char **cmd ) |
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[74c119d] | 110 | { |
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[87de505] | 111 | irc_abort( irc, 0, "Shutdown requested by operator" ); |
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[74c119d] | 112 | } |
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| 113 | |
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[f73b969] | 114 | static void ipc_child_cmd_wallops( irc_t *irc, char **cmd ) |
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[0431ea1] | 115 | { |
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[daa9e02] | 116 | if( irc->status < USTATUS_LOGGED_IN ) |
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[f73b969] | 117 | return; |
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[daa9e02] | 118 | |
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[0431ea1] | 119 | if( strchr( irc->umode, 'w' ) ) |
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[e0ca412] | 120 | irc_write( irc, ":%s WALLOPS :%s", irc->myhost, cmd[1] ); |
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| 121 | } |
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| 122 | |
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[f73b969] | 123 | static void ipc_child_cmd_lilo( irc_t *irc, char **cmd ) |
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[e0ca412] | 124 | { |
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[daa9e02] | 125 | if( irc->status < USTATUS_LOGGED_IN ) |
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[f73b969] | 126 | return; |
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[daa9e02] | 127 | |
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[74c119d] | 128 | if( strchr( irc->umode, 's' ) ) |
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| 129 | irc_write( irc, ":%s NOTICE %s :%s", irc->myhost, irc->nick, cmd[1] ); |
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[0431ea1] | 130 | } |
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| 131 | |
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[f73b969] | 132 | static void ipc_child_cmd_opermsg( irc_t *irc, char **cmd ) |
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[2face62] | 133 | { |
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| 134 | if( irc->status < USTATUS_LOGGED_IN ) |
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[f73b969] | 135 | return; |
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[2face62] | 136 | |
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| 137 | if( strchr( irc->umode, 'o' ) ) |
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| 138 | irc_write( irc, ":%s NOTICE %s :*** OperMsg *** %s", irc->myhost, irc->nick, cmd[1] ); |
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| 139 | } |
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| 140 | |
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[f73b969] | 141 | static void ipc_child_cmd_rehash( irc_t *irc, char **cmd ) |
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[f4a5940] | 142 | { |
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| 143 | runmode_t oldmode; |
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| 144 | |
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| 145 | oldmode = global.conf->runmode; |
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| 146 | |
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| 147 | g_free( global.conf ); |
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| 148 | global.conf = conf_load( 0, NULL ); |
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| 149 | |
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| 150 | global.conf->runmode = oldmode; |
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| 151 | } |
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| 152 | |
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[f73b969] | 153 | static void ipc_child_cmd_kill( irc_t *irc, char **cmd ) |
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[48721c3] | 154 | { |
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| 155 | if( irc->status < USTATUS_LOGGED_IN ) |
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[f73b969] | 156 | return; |
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[48721c3] | 157 | |
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| 158 | if( nick_cmp( cmd[1], irc->nick ) != 0 ) |
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[f73b969] | 159 | return; /* It's not for us. */ |
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[48721c3] | 160 | |
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| 161 | irc_write( irc, ":%s!%s@%s KILL %s :%s", irc->mynick, irc->mynick, irc->myhost, irc->nick, cmd[2] ); |
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[f73b969] | 162 | irc_abort( irc, 0, "Killed by operator: %s", cmd[2] ); |
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[48721c3] | 163 | } |
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| 164 | |
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[54879ab] | 165 | static void ipc_child_cmd_hello( irc_t *irc, char **cmd ) |
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| 166 | { |
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| 167 | if( irc->status < USTATUS_LOGGED_IN ) |
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| 168 | ipc_to_master_str( "HELLO\r\n" ); |
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| 169 | else |
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| 170 | ipc_to_master_str( "HELLO %s %s :%s\r\n", irc->host, irc->nick, irc->realname ); |
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| 171 | } |
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| 172 | |
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[0431ea1] | 173 | static const command_t ipc_child_commands[] = { |
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[74c119d] | 174 | { "die", 0, ipc_child_cmd_die, 0 }, |
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| 175 | { "wallops", 1, ipc_child_cmd_wallops, 0 }, |
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| 176 | { "lilo", 1, ipc_child_cmd_lilo, 0 }, |
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[2face62] | 177 | { "opermsg", 1, ipc_child_cmd_opermsg, 0 }, |
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[48721c3] | 178 | { "rehash", 0, ipc_child_cmd_rehash, 0 }, |
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| 179 | { "kill", 2, ipc_child_cmd_kill, 0 }, |
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[54879ab] | 180 | { "hello", 0, ipc_child_cmd_hello, 0 }, |
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[0431ea1] | 181 | { NULL } |
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| 182 | }; |
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| 183 | |
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[74c119d] | 184 | |
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[0431ea1] | 185 | static void ipc_command_exec( void *data, char **cmd, const command_t *commands ) |
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| 186 | { |
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[f1d38f2] | 187 | int i, j; |
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[0431ea1] | 188 | |
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| 189 | if( !cmd[0] ) |
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| 190 | return; |
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| 191 | |
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| 192 | for( i = 0; commands[i].command; i ++ ) |
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| 193 | if( g_strcasecmp( commands[i].command, cmd[0] ) == 0 ) |
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| 194 | { |
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[f1d38f2] | 195 | /* There is no typo in this line: */ |
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| 196 | for( j = 1; cmd[j]; j ++ ); j --; |
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| 197 | |
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| 198 | if( j < commands[i].required_parameters ) |
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| 199 | break; |
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| 200 | |
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[f4a5940] | 201 | if( commands[i].flags & IPC_CMD_TO_CHILDREN ) |
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| 202 | ipc_to_children( cmd ); |
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| 203 | else |
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| 204 | commands[i].execute( data, cmd ); |
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| 205 | |
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[f1d38f2] | 206 | break; |
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[0431ea1] | 207 | } |
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| 208 | } |
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| 209 | |
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| 210 | static char *ipc_readline( int fd ) |
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| 211 | { |
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| 212 | char *buf, *eol; |
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| 213 | int size; |
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| 214 | |
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| 215 | buf = g_new0( char, 513 ); |
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| 216 | |
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| 217 | /* Because this is internal communication, it should be pretty safe |
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| 218 | to just peek at the message, find its length (by searching for the |
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| 219 | end-of-line) and then just read that message. With internal |
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| 220 | sockets and limites message length, messages should always be |
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| 221 | complete. Saves us quite a lot of code and buffering. */ |
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| 222 | size = recv( fd, buf, 512, MSG_PEEK ); |
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| 223 | if( size == 0 || ( size < 0 && !sockerr_again() ) ) |
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| 224 | return NULL; |
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[1ea13be] | 225 | else if( size < 0 ) /* && sockerr_again() */ |
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| 226 | return( g_strdup( "" ) ); |
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[0431ea1] | 227 | else |
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| 228 | buf[size] = 0; |
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| 229 | |
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| 230 | eol = strstr( buf, "\r\n" ); |
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| 231 | if( eol == NULL ) |
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| 232 | return NULL; |
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| 233 | else |
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| 234 | size = eol - buf + 2; |
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| 235 | |
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| 236 | g_free( buf ); |
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| 237 | buf = g_new0( char, size + 1 ); |
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| 238 | |
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| 239 | if( recv( fd, buf, size, 0 ) != size ) |
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| 240 | return NULL; |
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| 241 | else |
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| 242 | buf[size-2] = 0; |
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| 243 | |
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| 244 | return buf; |
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| 245 | } |
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| 246 | |
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| 247 | void ipc_master_read( gpointer data, gint source, GaimInputCondition cond ) |
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| 248 | { |
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| 249 | char *buf, **cmd; |
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| 250 | |
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| 251 | if( ( buf = ipc_readline( source ) ) ) |
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| 252 | { |
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| 253 | cmd = irc_parse_line( buf ); |
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| 254 | if( cmd ) |
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| 255 | ipc_command_exec( data, cmd, ipc_master_commands ); |
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| 256 | } |
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| 257 | else |
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| 258 | { |
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| 259 | GSList *l; |
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| 260 | struct bitlbee_child *c; |
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| 261 | |
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| 262 | for( l = child_list; l; l = l->next ) |
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| 263 | { |
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| 264 | c = l->data; |
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| 265 | if( c->ipc_fd == source ) |
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| 266 | { |
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[2face62] | 267 | ipc_master_free_one( c ); |
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| 268 | child_list = g_slist_remove( child_list, c ); |
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[0431ea1] | 269 | break; |
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| 270 | } |
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| 271 | } |
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| 272 | } |
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| 273 | } |
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| 274 | |
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| 275 | void ipc_child_read( gpointer data, gint source, GaimInputCondition cond ) |
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| 276 | { |
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| 277 | char *buf, **cmd; |
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| 278 | |
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| 279 | if( ( buf = ipc_readline( source ) ) ) |
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| 280 | { |
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| 281 | cmd = irc_parse_line( buf ); |
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| 282 | if( cmd ) |
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| 283 | ipc_command_exec( data, cmd, ipc_child_commands ); |
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| 284 | } |
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| 285 | else |
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| 286 | { |
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| 287 | gaim_input_remove( global.listen_watch_source_id ); |
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| 288 | close( global.listen_socket ); |
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| 289 | |
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| 290 | global.listen_socket = -1; |
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| 291 | } |
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| 292 | } |
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| 293 | |
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| 294 | void ipc_to_master( char **cmd ) |
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| 295 | { |
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| 296 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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| 297 | { |
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[74c119d] | 298 | char *s = irc_build_line( cmd ); |
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[2face62] | 299 | ipc_to_master_str( "%s", s ); |
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[f4a5940] | 300 | g_free( s ); |
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| 301 | } |
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| 302 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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| 303 | { |
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| 304 | ipc_command_exec( NULL, cmd, ipc_master_commands ); |
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| 305 | } |
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| 306 | } |
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| 307 | |
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[2face62] | 308 | void ipc_to_master_str( char *format, ... ) |
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[f4a5940] | 309 | { |
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[2face62] | 310 | char *msg_buf; |
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| 311 | va_list params; |
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| 312 | |
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| 313 | va_start( params, format ); |
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| 314 | msg_buf = g_strdup_vprintf( format, params ); |
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| 315 | va_end( params ); |
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| 316 | |
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| 317 | if( strlen( msg_buf ) > 512 ) |
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| 318 | { |
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| 319 | /* Don't send it, it's too long... */ |
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| 320 | } |
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| 321 | else if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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[f4a5940] | 322 | { |
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| 323 | write( global.listen_socket, msg_buf, strlen( msg_buf ) ); |
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| 324 | } |
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| 325 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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| 326 | { |
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[bd9b00f] | 327 | char **cmd, *s; |
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| 328 | |
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| 329 | if( ( s = strchr( msg_buf, '\r' ) ) ) |
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| 330 | *s = 0; |
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[f4a5940] | 331 | |
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[2face62] | 332 | cmd = irc_parse_line( msg_buf ); |
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[f4a5940] | 333 | ipc_command_exec( NULL, cmd, ipc_master_commands ); |
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| 334 | g_free( cmd ); |
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[74c119d] | 335 | } |
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[2face62] | 336 | |
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| 337 | g_free( msg_buf ); |
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[74c119d] | 338 | } |
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| 339 | |
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| 340 | void ipc_to_children( char **cmd ) |
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| 341 | { |
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| 342 | if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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| 343 | { |
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| 344 | char *msg_buf = irc_build_line( cmd ); |
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[2face62] | 345 | ipc_to_children_str( "%s", msg_buf ); |
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[74c119d] | 346 | g_free( msg_buf ); |
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| 347 | } |
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[f4a5940] | 348 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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| 349 | { |
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| 350 | GSList *l; |
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| 351 | |
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| 352 | for( l = irc_connection_list; l; l = l->next ) |
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| 353 | ipc_command_exec( l->data, cmd, ipc_child_commands ); |
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| 354 | } |
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[74c119d] | 355 | } |
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| 356 | |
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[2face62] | 357 | void ipc_to_children_str( char *format, ... ) |
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[74c119d] | 358 | { |
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[2face62] | 359 | char *msg_buf; |
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| 360 | va_list params; |
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| 361 | |
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| 362 | va_start( params, format ); |
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| 363 | msg_buf = g_strdup_vprintf( format, params ); |
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| 364 | va_end( params ); |
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| 365 | |
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| 366 | if( strlen( msg_buf ) > 512 ) |
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| 367 | { |
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| 368 | /* Don't send it, it's too long... */ |
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| 369 | } |
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| 370 | else if( global.conf->runmode == RUNMODE_FORKDAEMON ) |
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[74c119d] | 371 | { |
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| 372 | int msg_len = strlen( msg_buf ); |
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| 373 | GSList *l; |
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[0431ea1] | 374 | |
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[74c119d] | 375 | for( l = child_list; l; l = l->next ) |
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[0431ea1] | 376 | { |
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[74c119d] | 377 | struct bitlbee_child *c = l->data; |
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| 378 | write( c->ipc_fd, msg_buf, msg_len ); |
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[0431ea1] | 379 | } |
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| 380 | } |
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[f4a5940] | 381 | else if( global.conf->runmode == RUNMODE_DAEMON ) |
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| 382 | { |
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[bd9b00f] | 383 | char **cmd, *s; |
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| 384 | |
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| 385 | if( ( s = strchr( msg_buf, '\r' ) ) ) |
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| 386 | *s = 0; |
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[f4a5940] | 387 | |
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[2face62] | 388 | cmd = irc_parse_line( msg_buf ); |
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[f4a5940] | 389 | ipc_to_children( cmd ); |
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| 390 | g_free( cmd ); |
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| 391 | } |
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[2face62] | 392 | |
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| 393 | g_free( msg_buf ); |
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| 394 | } |
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| 395 | |
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| 396 | void ipc_master_free_one( struct bitlbee_child *c ) |
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| 397 | { |
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| 398 | gaim_input_remove( c->ipc_inpa ); |
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| 399 | closesocket( c->ipc_fd ); |
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| 400 | |
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| 401 | g_free( c->host ); |
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| 402 | g_free( c->nick ); |
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| 403 | g_free( c->realname ); |
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| 404 | g_free( c ); |
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| 405 | } |
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| 406 | |
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| 407 | void ipc_master_free_all() |
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| 408 | { |
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| 409 | GSList *l; |
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| 410 | |
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| 411 | for( l = child_list; l; l = l->next ) |
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| 412 | ipc_master_free_one( l->data ); |
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| 413 | |
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| 414 | g_slist_free( child_list ); |
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| 415 | child_list = NULL; |
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[0431ea1] | 416 | } |
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[54879ab] | 417 | |
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| 418 | char *ipc_master_save_state() |
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| 419 | { |
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| 420 | char *fn = g_strdup( "/tmp/bee-restart.XXXXXX" ); |
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| 421 | int fd = mkstemp( fn ); |
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| 422 | GSList *l; |
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| 423 | FILE *fp; |
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| 424 | int i; |
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| 425 | |
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| 426 | if( fd == -1 ) |
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| 427 | { |
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| 428 | log_message( LOGLVL_ERROR, "Could not create temporary file: %s", strerror( errno ) ); |
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| 429 | g_free( fn ); |
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| 430 | return NULL; |
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| 431 | } |
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| 432 | |
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| 433 | /* This is more convenient now. */ |
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| 434 | fp = fdopen( fd, "w" ); |
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| 435 | |
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| 436 | for( l = child_list, i = 0; l; l = l->next ) |
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| 437 | i ++; |
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| 438 | |
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| 439 | /* Number of client processes. */ |
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| 440 | fprintf( fp, "%d\n", i ); |
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| 441 | |
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| 442 | for( l = child_list; l; l = l->next ) |
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| 443 | fprintf( fp, "%d %d\n", ((struct bitlbee_child*)l->data)->pid, |
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| 444 | ((struct bitlbee_child*)l->data)->ipc_fd ); |
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| 445 | |
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| 446 | if( fclose( fp ) == 0 ) |
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| 447 | { |
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| 448 | return fn; |
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| 449 | } |
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| 450 | else |
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| 451 | { |
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| 452 | unlink( fn ); |
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| 453 | g_free( fn ); |
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| 454 | return NULL; |
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| 455 | } |
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| 456 | } |
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| 457 | |
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| 458 | void ipc_master_set_statefile( char *fn ) |
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| 459 | { |
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| 460 | statefile = g_strdup( fn ); |
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| 461 | } |
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| 462 | |
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| 463 | int ipc_master_load_state() |
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| 464 | { |
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| 465 | struct bitlbee_child *child; |
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| 466 | FILE *fp; |
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| 467 | int i, n; |
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| 468 | |
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| 469 | if( statefile == NULL ) |
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| 470 | return 0; |
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| 471 | fp = fopen( statefile, "r" ); |
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| 472 | unlink( statefile ); /* Why do it later? :-) */ |
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| 473 | if( fp == NULL ) |
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| 474 | return 0; |
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| 475 | |
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| 476 | if( fscanf( fp, "%d", &n ) != 1 ) |
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| 477 | { |
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| 478 | log_message( LOGLVL_WARNING, "Could not import state information for child processes." ); |
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| 479 | fclose( fp ); |
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| 480 | return 0; |
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| 481 | } |
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| 482 | |
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| 483 | log_message( LOGLVL_INFO, "Importing information for %d child processes.", n ); |
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| 484 | for( i = 0; i < n; i ++ ) |
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| 485 | { |
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| 486 | child = g_new0( struct bitlbee_child, 1 ); |
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| 487 | |
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| 488 | if( fscanf( fp, "%d %d", &child->pid, &child->ipc_fd ) != 2 ) |
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| 489 | { |
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| 490 | log_message( LOGLVL_WARNING, "Unexpected end of file: Only processed %d clients.", i ); |
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| 491 | g_free( child ); |
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| 492 | fclose( fp ); |
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| 493 | return 0; |
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| 494 | } |
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| 495 | child->ipc_inpa = gaim_input_add( child->ipc_fd, GAIM_INPUT_READ, ipc_master_read, child ); |
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| 496 | |
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| 497 | child_list = g_slist_append( child_list, child ); |
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| 498 | } |
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| 499 | |
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| 500 | ipc_to_children_str( "HELLO\r\n" ); |
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| 501 | ipc_to_children_str( "OPERMSG :New BitlBee master process started (version " BITLBEE_VERSION ")\r\n" ); |
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| 502 | |
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| 503 | return 1; |
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| 504 | } |
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