1 | /********************************************************************\ |
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2 | * BitlBee -- An IRC to other IM-networks gateway * |
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3 | * * |
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4 | * Copyright 2002-2012 Wilmer van der Gaast and others * |
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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., 51 Franklin St., |
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23 | Fifth Floor, Boston, MA 02110-1301 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 | #include <sys/uio.h> |
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31 | #include <sys/un.h> |
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32 | |
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33 | GSList *child_list = NULL; |
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34 | static int ipc_child_recv_fd = -1; |
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35 | |
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36 | static void ipc_master_takeover_fail(struct bitlbee_child *child, gboolean both); |
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37 | static gboolean ipc_send_fd(int fd, int send_fd); |
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38 | |
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39 | /* On Solaris and possibly other systems passing FDs between processes is |
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40 | * not possible (or at least not using the method used in this file. |
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41 | * Just disable that code, the functionality is not that important. */ |
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42 | #if defined(NO_FD_PASSING) && !defined(CMSG_SPACE) |
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43 | #define CMSG_SPACE(len) 1 |
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44 | #endif |
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45 | |
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46 | static void ipc_master_cmd_client(irc_t *data, char **cmd) |
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47 | { |
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48 | /* Normally data points at an irc_t block, but for the IPC master |
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49 | this is different. We think this scary cast is better than |
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50 | creating a new command_t structure, just to make the compiler |
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51 | happy. */ |
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52 | struct bitlbee_child *child = (void *) data; |
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53 | |
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54 | if (child && cmd[1]) { |
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55 | child->host = g_strdup(cmd[1]); |
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56 | child->nick = g_strdup(cmd[2]); |
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57 | child->realname = g_strdup(cmd[3]); |
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58 | } |
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59 | |
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60 | /* CLIENT == On initial connects, HELLO is after /RESTARTs. */ |
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61 | if (g_strcasecmp(cmd[0], "CLIENT") == 0) { |
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62 | ipc_to_children_str("OPERMSG :Client connecting (PID=%d): %s@%s (%s)\r\n", |
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63 | (int) (child ? child->pid : -1), cmd[2], cmd[1], cmd[3]); |
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64 | } |
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65 | } |
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66 | |
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67 | static void ipc_master_cmd_nick(irc_t *data, char **cmd) |
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68 | { |
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69 | struct bitlbee_child *child = (void *) data; |
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70 | |
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71 | if (child && cmd[1]) { |
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72 | g_free(child->nick); |
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73 | child->nick = g_strdup(cmd[1]); |
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74 | } |
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75 | } |
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76 | |
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77 | static void ipc_master_cmd_die(irc_t *data, char **cmd) |
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78 | { |
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79 | if (global.conf->runmode == RUNMODE_FORKDAEMON) { |
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80 | ipc_to_children_str("DIE\r\n"); |
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81 | } |
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82 | |
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83 | bitlbee_shutdown(NULL, -1, 0); |
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84 | } |
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85 | |
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86 | static void ipc_master_cmd_deaf(irc_t *data, char **cmd) |
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87 | { |
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88 | if (global.conf->runmode == RUNMODE_DAEMON) { |
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89 | b_event_remove(global.listen_watch_source_id); |
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90 | close(global.listen_socket); |
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91 | |
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92 | global.listen_socket = global.listen_watch_source_id = -1; |
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93 | |
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94 | ipc_to_children_str("OPERMSG :Closed listening socket, waiting " |
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95 | "for all users to disconnect."); |
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96 | } else { |
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97 | ipc_to_children_str("OPERMSG :The DEAF command only works in " |
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98 | "normal daemon mode. Try DIE instead."); |
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99 | } |
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100 | } |
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101 | |
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102 | void ipc_master_cmd_rehash(irc_t *data, char **cmd) |
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103 | { |
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104 | runmode_t oldmode; |
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105 | |
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106 | oldmode = global.conf->runmode; |
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107 | |
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108 | g_free(global.conf); |
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109 | global.conf = conf_load(0, NULL); |
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110 | |
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111 | if (global.conf->runmode != oldmode) { |
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112 | log_message(LOGLVL_WARNING, "Can't change RunMode setting at runtime, restoring original setting"); |
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113 | global.conf->runmode = oldmode; |
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114 | } |
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115 | |
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116 | if (global.conf->runmode == RUNMODE_FORKDAEMON) { |
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117 | ipc_to_children(cmd); |
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118 | } |
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119 | } |
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120 | |
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121 | void ipc_master_cmd_restart(irc_t *data, char **cmd) |
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122 | { |
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123 | if (global.conf->runmode != RUNMODE_FORKDAEMON) { |
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124 | /* Tell child that this is unsupported. */ |
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125 | return; |
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126 | } |
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127 | |
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128 | global.restart = -1; |
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129 | bitlbee_shutdown(NULL, -1, 0); |
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130 | } |
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131 | |
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132 | void ipc_master_cmd_identify(irc_t *data, char **cmd) |
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133 | { |
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134 | struct bitlbee_child *child = (void *) data, *old = NULL; |
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135 | char *resp; |
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136 | GSList *l; |
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137 | |
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138 | if (!child || !child->nick || strcmp(child->nick, cmd[1]) != 0) { |
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139 | return; |
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140 | } |
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141 | |
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142 | g_free(child->password); |
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143 | child->password = g_strdup(cmd[2]); |
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144 | |
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145 | for (l = child_list; l; l = l->next) { |
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146 | old = l->data; |
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147 | if (child != old && |
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148 | old->nick && nick_cmp(NULL, old->nick, child->nick) == 0 && |
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149 | old->password && strcmp(old->password, child->password) == 0) { |
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150 | break; |
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151 | } |
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152 | } |
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153 | |
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154 | if (l && !child->to_child && !old->to_child) { |
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155 | resp = "TAKEOVER INIT\r\n"; |
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156 | child->to_child = old; |
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157 | old->to_child = child; |
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158 | } else { |
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159 | /* Won't need the fd since we can't send it anywhere. */ |
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160 | closesocket(child->to_fd); |
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161 | child->to_fd = -1; |
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162 | resp = "TAKEOVER NO\r\n"; |
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163 | } |
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164 | |
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165 | if (write(child->ipc_fd, resp, strlen(resp)) != strlen(resp)) { |
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166 | ipc_master_free_one(child); |
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167 | } |
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168 | } |
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169 | |
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170 | |
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171 | void ipc_master_cmd_takeover(irc_t *data, char **cmd) |
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172 | { |
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173 | struct bitlbee_child *child = (void *) data; |
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174 | char *fwd = NULL; |
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175 | |
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176 | /* Normal daemon mode doesn't keep these and has simplified code for |
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177 | takeovers. */ |
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178 | if (child == NULL) { |
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179 | return; |
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180 | } |
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181 | |
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182 | if (child->to_child == NULL || |
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183 | g_slist_find(child_list, child->to_child) == NULL) { |
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184 | return ipc_master_takeover_fail(child, FALSE); |
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185 | } |
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186 | |
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187 | if (strcmp(cmd[1], "AUTH") == 0) { |
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188 | /* New connection -> Master */ |
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189 | if (child->to_child && |
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190 | child->nick && child->to_child->nick && cmd[2] && |
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191 | child->password && child->to_child->password && cmd[3] && |
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192 | strcmp(child->nick, child->to_child->nick) == 0 && |
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193 | strcmp(child->nick, cmd[2]) == 0 && |
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194 | strcmp(child->password, child->to_child->password) == 0 && |
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195 | strcmp(child->password, cmd[3]) == 0) { |
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196 | ipc_send_fd(child->to_child->ipc_fd, child->to_fd); |
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197 | |
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198 | fwd = irc_build_line(cmd); |
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199 | if (write(child->to_child->ipc_fd, fwd, strlen(fwd)) != strlen(fwd)) { |
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200 | ipc_master_free_one(child); |
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201 | } |
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202 | g_free(fwd); |
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203 | } else { |
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204 | return ipc_master_takeover_fail(child, TRUE); |
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205 | } |
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206 | } else if (strcmp(cmd[1], "DONE") == 0 || strcmp(cmd[1], "FAIL") == 0) { |
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207 | /* Old connection -> Master */ |
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208 | int fd; |
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209 | |
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210 | /* The copy was successful (or not), we don't need it anymore. */ |
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211 | closesocket(child->to_fd); |
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212 | child->to_fd = -1; |
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213 | |
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214 | /* Pass it through to the other party, and flush all state. */ |
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215 | fwd = irc_build_line(cmd); |
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216 | fd = child->to_child->ipc_fd; |
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217 | child->to_child->to_child = NULL; |
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218 | child->to_child = NULL; |
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219 | if (write(fd, fwd, strlen(fwd)) != strlen(fwd)) { |
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220 | ipc_master_free_one(child); |
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221 | } |
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222 | g_free(fwd); |
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223 | } |
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224 | } |
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225 | |
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226 | static const command_t ipc_master_commands[] = { |
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227 | { "client", 3, ipc_master_cmd_client, 0 }, |
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228 | { "hello", 0, ipc_master_cmd_client, 0 }, |
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229 | { "nick", 1, ipc_master_cmd_nick, 0 }, |
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230 | { "die", 0, ipc_master_cmd_die, 0 }, |
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231 | { "deaf", 0, ipc_master_cmd_deaf, 0 }, |
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232 | { "wallops", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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233 | { "wall", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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234 | { "opermsg", 1, NULL, IPC_CMD_TO_CHILDREN }, |
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235 | { "rehash", 0, ipc_master_cmd_rehash, 0 }, |
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236 | { "kill", 2, NULL, IPC_CMD_TO_CHILDREN }, |
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237 | { "restart", 0, ipc_master_cmd_restart, 0 }, |
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238 | { "identify", 2, ipc_master_cmd_identify, 0 }, |
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239 | { "takeover", 1, ipc_master_cmd_takeover, 0 }, |
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240 | { NULL } |
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241 | }; |
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242 | |
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243 | |
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244 | static void ipc_child_cmd_die(irc_t *irc, char **cmd) |
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245 | { |
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246 | irc_abort(irc, 0, "Shutdown requested by operator"); |
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247 | } |
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248 | |
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249 | static void ipc_child_cmd_wallops(irc_t *irc, char **cmd) |
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250 | { |
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251 | if (!(irc->status & USTATUS_LOGGED_IN)) { |
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252 | return; |
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253 | } |
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254 | |
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255 | if (strchr(irc->umode, 'w')) { |
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256 | irc_write(irc, ":%s WALLOPS :%s", irc->root->host, cmd[1]); |
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257 | } |
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258 | } |
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259 | |
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260 | static void ipc_child_cmd_wall(irc_t *irc, char **cmd) |
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261 | { |
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262 | if (!(irc->status & USTATUS_LOGGED_IN)) { |
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263 | return; |
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264 | } |
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265 | |
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266 | if (strchr(irc->umode, 's')) { |
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267 | irc_write(irc, ":%s NOTICE %s :%s", irc->root->host, irc->user->nick, cmd[1]); |
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268 | } |
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269 | } |
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270 | |
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271 | static void ipc_child_cmd_opermsg(irc_t *irc, char **cmd) |
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272 | { |
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273 | if (!(irc->status & USTATUS_LOGGED_IN)) { |
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274 | return; |
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275 | } |
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276 | |
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277 | if (strchr(irc->umode, 'o')) { |
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278 | irc_write(irc, ":%s NOTICE %s :*** OperMsg *** %s", irc->root->host, irc->user->nick, cmd[1]); |
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279 | } |
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280 | } |
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281 | |
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282 | static void ipc_child_cmd_rehash(irc_t *irc, char **cmd) |
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283 | { |
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284 | runmode_t oldmode; |
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285 | |
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286 | oldmode = global.conf->runmode; |
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287 | |
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288 | g_free(global.conf); |
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289 | global.conf = conf_load(0, NULL); |
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290 | |
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291 | global.conf->runmode = oldmode; |
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292 | } |
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293 | |
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294 | static void ipc_child_cmd_kill(irc_t *irc, char **cmd) |
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295 | { |
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296 | if (!(irc->status & USTATUS_LOGGED_IN)) { |
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297 | return; |
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298 | } |
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299 | |
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300 | if (nick_cmp(NULL, cmd[1], irc->user->nick) != 0) { |
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301 | return; /* It's not for us. */ |
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302 | |
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303 | } |
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304 | irc_write(irc, ":%s!%s@%s KILL %s :%s", irc->root->nick, irc->root->nick, irc->root->host, irc->user->nick, |
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305 | cmd[2]); |
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306 | irc_abort(irc, 0, "Killed by operator: %s", cmd[2]); |
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307 | } |
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308 | |
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309 | static void ipc_child_cmd_hello(irc_t *irc, char **cmd) |
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310 | { |
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311 | if (!(irc->status & USTATUS_LOGGED_IN)) { |
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312 | ipc_to_master_str("HELLO\r\n"); |
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313 | } else { |
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314 | ipc_to_master_str("HELLO %s %s :%s\r\n", irc->user->host, irc->user->nick, irc->user->fullname); |
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315 | } |
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316 | } |
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317 | |
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318 | static void ipc_child_cmd_takeover_yes(void *data); |
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319 | static void ipc_child_cmd_takeover_no(void *data); |
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320 | |
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321 | static void ipc_child_cmd_takeover(irc_t *irc, char **cmd) |
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322 | { |
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323 | if (strcmp(cmd[1], "NO") == 0) { |
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324 | /* Master->New connection */ |
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325 | /* No takeover, finish the login. */ |
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326 | } else if (strcmp(cmd[1], "INIT") == 0) { |
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327 | /* Master->New connection */ |
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328 | if (!set_getbool(&irc->b->set, "allow_takeover")) { |
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329 | ipc_child_cmd_takeover_no(irc); |
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330 | return; |
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331 | } |
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332 | |
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333 | /* Offer to take over the old session, unless for some reason |
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334 | we're already logging into IM connections. */ |
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335 | if (irc->login_source_id != -1) { |
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336 | query_add(irc, NULL, |
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337 | "You're already connected to this server. " |
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338 | "Would you like to take over this session?", |
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339 | ipc_child_cmd_takeover_yes, |
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340 | ipc_child_cmd_takeover_no, NULL, irc); |
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341 | } |
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342 | |
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343 | /* This one's going to connect to accounts, avoid that. */ |
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344 | b_event_remove(irc->login_source_id); |
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345 | irc->login_source_id = -1; |
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346 | } else if (strcmp(cmd[1], "AUTH") == 0) { |
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347 | /* Master->Old connection */ |
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348 | if (irc->password && cmd[2] && cmd[3] && |
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349 | ipc_child_recv_fd != -1 && |
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350 | strcmp(irc->user->nick, cmd[2]) == 0 && |
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351 | strcmp(irc->password, cmd[3]) == 0 && |
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352 | set_getbool(&irc->b->set, "allow_takeover")) { |
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353 | irc_switch_fd(irc, ipc_child_recv_fd); |
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354 | irc_sync(irc); |
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355 | irc_rootmsg(irc, "You've successfully taken over your old session"); |
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356 | ipc_child_recv_fd = -1; |
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357 | |
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358 | ipc_to_master_str("TAKEOVER DONE\r\n"); |
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359 | } else { |
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360 | ipc_to_master_str("TAKEOVER FAIL\r\n"); |
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361 | } |
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362 | } else if (strcmp(cmd[1], "DONE") == 0) { |
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363 | /* Master->New connection (now taken over by old process) */ |
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364 | irc_free(irc); |
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365 | } else if (strcmp(cmd[1], "FAIL") == 0) { |
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366 | /* Master->New connection */ |
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367 | irc_rootmsg(irc, "Could not take over old session"); |
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368 | } |
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369 | } |
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370 | |
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371 | static void ipc_child_cmd_takeover_yes(void *data) |
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372 | { |
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373 | irc_t *irc = data, *old = NULL; |
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374 | char *to_auth[] = { "TAKEOVER", "AUTH", irc->user->nick, irc->password, NULL }; |
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375 | |
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376 | /* Master->New connection */ |
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377 | ipc_to_master_str("TAKEOVER AUTH %s :%s\r\n", |
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378 | irc->user->nick, irc->password); |
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379 | |
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380 | if (global.conf->runmode == RUNMODE_DAEMON) { |
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381 | GSList *l; |
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382 | |
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383 | for (l = irc_connection_list; l; l = l->next) { |
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384 | old = l->data; |
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385 | |
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386 | if (irc != old && |
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387 | irc->user->nick && old->user->nick && |
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388 | irc->password && old->password && |
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389 | strcmp(irc->user->nick, old->user->nick) == 0 && |
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390 | strcmp(irc->password, old->password) == 0) { |
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391 | break; |
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392 | } |
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393 | } |
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394 | if (l == NULL) { |
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395 | to_auth[1] = "FAIL"; |
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396 | ipc_child_cmd_takeover(irc, to_auth); |
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397 | return; |
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398 | } |
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399 | } |
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400 | |
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401 | /* Drop credentials, we'll shut down soon and shouldn't overwrite |
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402 | any settings. */ |
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403 | irc_rootmsg(irc, "Trying to take over existing session"); |
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404 | |
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405 | irc_desync(irc); |
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406 | |
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407 | if (old) { |
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408 | ipc_child_recv_fd = dup(irc->fd); |
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409 | ipc_child_cmd_takeover(old, to_auth); |
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410 | } |
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411 | |
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412 | /* TODO: irc_setpass() should do all of this. */ |
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413 | irc_setpass(irc, NULL); |
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414 | irc->status &= ~USTATUS_IDENTIFIED; |
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415 | irc_umode_set(irc, "-R", 1); |
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416 | |
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417 | if (old) { |
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418 | irc_abort(irc, FALSE, NULL); |
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419 | } |
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420 | } |
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421 | |
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422 | static void ipc_child_cmd_takeover_no(void *data) |
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423 | { |
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424 | ipc_to_master_str("TAKEOVER NO\r\n"); |
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425 | cmd_identify_finish(data, 0, 0); |
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426 | } |
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427 | |
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428 | static const command_t ipc_child_commands[] = { |
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429 | { "die", 0, ipc_child_cmd_die, 0 }, |
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430 | { "wallops", 1, ipc_child_cmd_wallops, 0 }, |
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431 | { "wall", 1, ipc_child_cmd_wall, 0 }, |
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432 | { "opermsg", 1, ipc_child_cmd_opermsg, 0 }, |
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433 | { "rehash", 0, ipc_child_cmd_rehash, 0 }, |
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434 | { "kill", 2, ipc_child_cmd_kill, 0 }, |
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435 | { "hello", 0, ipc_child_cmd_hello, 0 }, |
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436 | { "takeover", 1, ipc_child_cmd_takeover, 0 }, |
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437 | { NULL } |
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438 | }; |
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439 | |
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440 | gboolean ipc_child_identify(irc_t *irc) |
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441 | { |
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442 | if (global.conf->runmode == RUNMODE_FORKDAEMON) { |
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443 | #ifndef NO_FD_PASSING |
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444 | if (!ipc_send_fd(global.listen_socket, irc->fd)) { |
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445 | ipc_child_disable(); |
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446 | } |
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447 | |
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448 | ipc_to_master_str("IDENTIFY %s :%s\r\n", irc->user->nick, irc->password); |
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449 | #endif |
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450 | |
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451 | return TRUE; |
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452 | } else if (global.conf->runmode == RUNMODE_DAEMON) { |
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453 | GSList *l; |
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454 | irc_t *old = NULL; |
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455 | char *to_init[] = { "TAKEOVER", "INIT", NULL }; |
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456 | |
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457 | for (l = irc_connection_list; l; l = l->next) { |
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458 | old = l->data; |
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459 | |
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460 | if (irc != old && |
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461 | irc->user->nick && old->user->nick && |
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462 | irc->password && old->password && |
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463 | strcmp(irc->user->nick, old->user->nick) == 0 && |
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464 | strcmp(irc->password, old->password) == 0) { |
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465 | break; |
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466 | } |
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467 | } |
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468 | if (l == NULL || old == NULL || |
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469 | !set_getbool(&irc->b->set, "allow_takeover") || |
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470 | !set_getbool(&old->b->set, "allow_takeover")) { |
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471 | return FALSE; |
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472 | } |
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473 | |
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474 | ipc_child_cmd_takeover(irc, to_init); |
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475 | |
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476 | return TRUE; |
---|
477 | } else { |
---|
478 | return FALSE; |
---|
479 | } |
---|
480 | } |
---|
481 | |
---|
482 | static void ipc_master_takeover_fail(struct bitlbee_child *child, gboolean both) |
---|
483 | { |
---|
484 | if (child == NULL || g_slist_find(child_list, child) == NULL) { |
---|
485 | return; |
---|
486 | } |
---|
487 | |
---|
488 | if (both && child->to_child != NULL) { |
---|
489 | ipc_master_takeover_fail(child->to_child, FALSE); |
---|
490 | } |
---|
491 | |
---|
492 | if (child->to_fd > -1) { |
---|
493 | /* Send this error only to the new connection, which can be |
---|
494 | recognised by to_fd being set. */ |
---|
495 | if (write(child->ipc_fd, "TAKEOVER FAIL\r\n", 15) != 15) { |
---|
496 | ipc_master_free_one(child); |
---|
497 | return; |
---|
498 | } |
---|
499 | close(child->to_fd); |
---|
500 | child->to_fd = -1; |
---|
501 | } |
---|
502 | child->to_child = NULL; |
---|
503 | } |
---|
504 | |
---|
505 | static void ipc_command_exec(void *data, char **cmd, const command_t *commands) |
---|
506 | { |
---|
507 | int i, j; |
---|
508 | |
---|
509 | if (!cmd[0]) { |
---|
510 | return; |
---|
511 | } |
---|
512 | |
---|
513 | for (i = 0; commands[i].command; i++) { |
---|
514 | if (g_strcasecmp(commands[i].command, cmd[0]) == 0) { |
---|
515 | /* There is no typo in this line: */ |
---|
516 | for (j = 1; cmd[j]; j++) { |
---|
517 | ; |
---|
518 | } |
---|
519 | j--; |
---|
520 | |
---|
521 | if (j < commands[i].required_parameters) { |
---|
522 | break; |
---|
523 | } |
---|
524 | |
---|
525 | if (commands[i].flags & IPC_CMD_TO_CHILDREN) { |
---|
526 | ipc_to_children(cmd); |
---|
527 | } else { |
---|
528 | commands[i].execute(data, cmd); |
---|
529 | } |
---|
530 | |
---|
531 | break; |
---|
532 | } |
---|
533 | } |
---|
534 | } |
---|
535 | |
---|
536 | /* Return just one line. Returns NULL if something broke, an empty string |
---|
537 | on temporary "errors" (EAGAIN and friends). */ |
---|
538 | static char *ipc_readline(int fd, int *recv_fd) |
---|
539 | { |
---|
540 | struct msghdr msg; |
---|
541 | struct iovec iov; |
---|
542 | char ccmsg[CMSG_SPACE(sizeof(recv_fd))]; |
---|
543 | struct cmsghdr *cmsg; |
---|
544 | char buf[513], *eol; |
---|
545 | int size; |
---|
546 | |
---|
547 | /* Because this is internal communication, it should be pretty safe |
---|
548 | to just peek at the message, find its length (by searching for the |
---|
549 | end-of-line) and then just read that message. With internal |
---|
550 | sockets and limites message length, messages should always be |
---|
551 | complete. Saves us quite a lot of code and buffering. */ |
---|
552 | size = recv(fd, buf, sizeof(buf) - 1, MSG_PEEK); |
---|
553 | if (size == 0 || (size < 0 && !sockerr_again())) { |
---|
554 | return NULL; |
---|
555 | } else if (size < 0) { /* && sockerr_again() */ |
---|
556 | return(g_strdup("")); |
---|
557 | } else { |
---|
558 | buf[size] = 0; |
---|
559 | } |
---|
560 | |
---|
561 | if ((eol = strstr(buf, "\r\n")) == NULL) { |
---|
562 | return NULL; |
---|
563 | } else { |
---|
564 | size = eol - buf + 2; |
---|
565 | } |
---|
566 | |
---|
567 | iov.iov_base = buf; |
---|
568 | iov.iov_len = size; |
---|
569 | |
---|
570 | memset(&msg, 0, sizeof(msg)); |
---|
571 | msg.msg_iov = &iov; |
---|
572 | msg.msg_iovlen = 1; |
---|
573 | #ifndef NO_FD_PASSING |
---|
574 | msg.msg_control = ccmsg; |
---|
575 | msg.msg_controllen = sizeof(ccmsg); |
---|
576 | #endif |
---|
577 | |
---|
578 | if (recvmsg(fd, &msg, 0) != size) { |
---|
579 | return NULL; |
---|
580 | } |
---|
581 | |
---|
582 | #ifndef NO_FD_PASSING |
---|
583 | if (recv_fd) { |
---|
584 | for (cmsg = CMSG_FIRSTHDR(&msg); cmsg; cmsg = CMSG_NXTHDR(&msg, cmsg)) { |
---|
585 | if (cmsg->cmsg_level == SOL_SOCKET && cmsg->cmsg_type == SCM_RIGHTS) { |
---|
586 | /* Getting more than one shouldn't happen but if it does, |
---|
587 | make sure we don't leave them around. */ |
---|
588 | if (*recv_fd != -1) { |
---|
589 | close(*recv_fd); |
---|
590 | } |
---|
591 | |
---|
592 | memcpy(recv_fd, CMSG_DATA(cmsg), sizeof(int)); |
---|
593 | /* |
---|
594 | fprintf( stderr, "pid %d received fd %d\n", (int) getpid(), *recv_fd ); |
---|
595 | */ |
---|
596 | } |
---|
597 | } |
---|
598 | } |
---|
599 | #endif |
---|
600 | |
---|
601 | /* |
---|
602 | fprintf( stderr, "pid %d received: %s", (int) getpid(), buf ); |
---|
603 | */ |
---|
604 | return g_strndup(buf, size - 2); |
---|
605 | } |
---|
606 | |
---|
607 | gboolean ipc_master_read(gpointer data, gint source, b_input_condition cond) |
---|
608 | { |
---|
609 | struct bitlbee_child *child = data; |
---|
610 | char *buf, **cmd; |
---|
611 | |
---|
612 | if ((buf = ipc_readline(source, &child->to_fd))) { |
---|
613 | cmd = irc_parse_line(buf); |
---|
614 | if (cmd) { |
---|
615 | ipc_command_exec(child, cmd, ipc_master_commands); |
---|
616 | g_free(cmd); |
---|
617 | } |
---|
618 | g_free(buf); |
---|
619 | } else { |
---|
620 | ipc_master_free_fd(source); |
---|
621 | } |
---|
622 | |
---|
623 | return TRUE; |
---|
624 | } |
---|
625 | |
---|
626 | gboolean ipc_child_read(gpointer data, gint source, b_input_condition cond) |
---|
627 | { |
---|
628 | char *buf, **cmd; |
---|
629 | |
---|
630 | if ((buf = ipc_readline(source, &ipc_child_recv_fd))) { |
---|
631 | cmd = irc_parse_line(buf); |
---|
632 | if (cmd) { |
---|
633 | ipc_command_exec(data, cmd, ipc_child_commands); |
---|
634 | g_free(cmd); |
---|
635 | } |
---|
636 | g_free(buf); |
---|
637 | } else { |
---|
638 | ipc_child_disable(); |
---|
639 | } |
---|
640 | |
---|
641 | return TRUE; |
---|
642 | } |
---|
643 | |
---|
644 | void ipc_to_master(char **cmd) |
---|
645 | { |
---|
646 | if (global.conf->runmode == RUNMODE_FORKDAEMON) { |
---|
647 | char *s = irc_build_line(cmd); |
---|
648 | ipc_to_master_str("%s", s); |
---|
649 | g_free(s); |
---|
650 | } else if (global.conf->runmode == RUNMODE_DAEMON) { |
---|
651 | ipc_command_exec(NULL, cmd, ipc_master_commands); |
---|
652 | } |
---|
653 | } |
---|
654 | |
---|
655 | void ipc_to_master_str(char *format, ...) |
---|
656 | { |
---|
657 | char *msg_buf; |
---|
658 | va_list params; |
---|
659 | |
---|
660 | va_start(params, format); |
---|
661 | msg_buf = g_strdup_vprintf(format, params); |
---|
662 | va_end(params); |
---|
663 | |
---|
664 | if (strlen(msg_buf) > 512) { |
---|
665 | /* Don't send it, it's too long... */ |
---|
666 | } else if (global.conf->runmode == RUNMODE_FORKDAEMON) { |
---|
667 | if (global.listen_socket >= 0) { |
---|
668 | if (write(global.listen_socket, msg_buf, strlen(msg_buf)) <= 0) { |
---|
669 | ipc_child_disable(); |
---|
670 | } |
---|
671 | } |
---|
672 | } else if (global.conf->runmode == RUNMODE_DAEMON) { |
---|
673 | char **cmd, *s; |
---|
674 | |
---|
675 | if ((s = strchr(msg_buf, '\r'))) { |
---|
676 | *s = 0; |
---|
677 | } |
---|
678 | |
---|
679 | cmd = irc_parse_line(msg_buf); |
---|
680 | ipc_command_exec(NULL, cmd, ipc_master_commands); |
---|
681 | g_free(cmd); |
---|
682 | } |
---|
683 | |
---|
684 | g_free(msg_buf); |
---|
685 | } |
---|
686 | |
---|
687 | void ipc_to_children(char **cmd) |
---|
688 | { |
---|
689 | if (global.conf->runmode == RUNMODE_FORKDAEMON) { |
---|
690 | char *msg_buf = irc_build_line(cmd); |
---|
691 | ipc_to_children_str("%s", msg_buf); |
---|
692 | g_free(msg_buf); |
---|
693 | } else if (global.conf->runmode == RUNMODE_DAEMON) { |
---|
694 | GSList *l; |
---|
695 | |
---|
696 | for (l = irc_connection_list; l; l = l->next) { |
---|
697 | ipc_command_exec(l->data, cmd, ipc_child_commands); |
---|
698 | } |
---|
699 | } |
---|
700 | } |
---|
701 | |
---|
702 | void ipc_to_children_str(char *format, ...) |
---|
703 | { |
---|
704 | char *msg_buf; |
---|
705 | va_list params; |
---|
706 | |
---|
707 | va_start(params, format); |
---|
708 | msg_buf = g_strdup_vprintf(format, params); |
---|
709 | va_end(params); |
---|
710 | |
---|
711 | if (strlen(msg_buf) > 512) { |
---|
712 | /* Don't send it, it's too long... */ |
---|
713 | } else if (global.conf->runmode == RUNMODE_FORKDAEMON) { |
---|
714 | int msg_len = strlen(msg_buf); |
---|
715 | GSList *l, *next; |
---|
716 | |
---|
717 | for (l = child_list; l; l = next) { |
---|
718 | struct bitlbee_child *c = l->data; |
---|
719 | |
---|
720 | next = l->next; |
---|
721 | if (write(c->ipc_fd, msg_buf, msg_len) <= 0) { |
---|
722 | ipc_master_free_one(c); |
---|
723 | } |
---|
724 | } |
---|
725 | } else if (global.conf->runmode == RUNMODE_DAEMON) { |
---|
726 | char **cmd, *s; |
---|
727 | |
---|
728 | if ((s = strchr(msg_buf, '\r'))) { |
---|
729 | *s = 0; |
---|
730 | } |
---|
731 | |
---|
732 | cmd = irc_parse_line(msg_buf); |
---|
733 | ipc_to_children(cmd); |
---|
734 | g_free(cmd); |
---|
735 | } |
---|
736 | |
---|
737 | g_free(msg_buf); |
---|
738 | } |
---|
739 | |
---|
740 | static gboolean ipc_send_fd(int fd, int send_fd) |
---|
741 | { |
---|
742 | struct msghdr msg; |
---|
743 | struct iovec iov; |
---|
744 | char ccmsg[CMSG_SPACE(sizeof(fd))]; |
---|
745 | struct cmsghdr *cmsg; |
---|
746 | |
---|
747 | memset(&msg, 0, sizeof(msg)); |
---|
748 | iov.iov_base = "0x90\r\n"; /* Ja, noppes */ |
---|
749 | iov.iov_len = 6; |
---|
750 | msg.msg_iov = &iov; |
---|
751 | msg.msg_iovlen = 1; |
---|
752 | |
---|
753 | #ifndef NO_FD_PASSING |
---|
754 | msg.msg_control = ccmsg; |
---|
755 | msg.msg_controllen = sizeof(ccmsg); |
---|
756 | cmsg = CMSG_FIRSTHDR(&msg); |
---|
757 | cmsg->cmsg_level = SOL_SOCKET; |
---|
758 | cmsg->cmsg_type = SCM_RIGHTS; |
---|
759 | cmsg->cmsg_len = CMSG_LEN(sizeof(send_fd)); |
---|
760 | memcpy(CMSG_DATA(cmsg), &send_fd, sizeof(int)); |
---|
761 | msg.msg_controllen = cmsg->cmsg_len; |
---|
762 | #endif |
---|
763 | |
---|
764 | return sendmsg(fd, &msg, 0) == 6; |
---|
765 | } |
---|
766 | |
---|
767 | void ipc_master_free_one(struct bitlbee_child *c) |
---|
768 | { |
---|
769 | GSList *l; |
---|
770 | |
---|
771 | b_event_remove(c->ipc_inpa); |
---|
772 | closesocket(c->ipc_fd); |
---|
773 | |
---|
774 | if (c->to_fd != -1) { |
---|
775 | close(c->to_fd); |
---|
776 | } |
---|
777 | |
---|
778 | child_list = g_slist_remove(child_list, c); |
---|
779 | |
---|
780 | g_free(c->host); |
---|
781 | g_free(c->nick); |
---|
782 | g_free(c->realname); |
---|
783 | g_free(c->password); |
---|
784 | g_free(c); |
---|
785 | |
---|
786 | /* Also, if any child has a reference to this one, remove it. */ |
---|
787 | for (l = child_list; l; l = l->next) { |
---|
788 | struct bitlbee_child *oc = l->data; |
---|
789 | |
---|
790 | if (oc->to_child == c) { |
---|
791 | ipc_master_takeover_fail(oc, FALSE); |
---|
792 | } |
---|
793 | } |
---|
794 | } |
---|
795 | |
---|
796 | void ipc_master_free_fd(int fd) |
---|
797 | { |
---|
798 | GSList *l; |
---|
799 | struct bitlbee_child *c; |
---|
800 | |
---|
801 | for (l = child_list; l; l = l->next) { |
---|
802 | c = l->data; |
---|
803 | if (c->ipc_fd == fd) { |
---|
804 | ipc_master_free_one(c); |
---|
805 | break; |
---|
806 | } |
---|
807 | } |
---|
808 | } |
---|
809 | |
---|
810 | void ipc_master_free_all() |
---|
811 | { |
---|
812 | while (child_list) { |
---|
813 | ipc_master_free_one(child_list->data); |
---|
814 | } |
---|
815 | } |
---|
816 | |
---|
817 | void ipc_child_disable() |
---|
818 | { |
---|
819 | b_event_remove(global.listen_watch_source_id); |
---|
820 | close(global.listen_socket); |
---|
821 | |
---|
822 | global.listen_socket = -1; |
---|
823 | } |
---|
824 | |
---|
825 | char *ipc_master_save_state() |
---|
826 | { |
---|
827 | char *fn = g_strdup("/tmp/bee-restart.XXXXXX"); |
---|
828 | int fd = mkstemp(fn); |
---|
829 | GSList *l; |
---|
830 | FILE *fp; |
---|
831 | int i; |
---|
832 | |
---|
833 | if (fd == -1) { |
---|
834 | log_message(LOGLVL_ERROR, "Could not create temporary file: %s", strerror(errno)); |
---|
835 | g_free(fn); |
---|
836 | return NULL; |
---|
837 | } |
---|
838 | |
---|
839 | /* This is more convenient now. */ |
---|
840 | fp = fdopen(fd, "w"); |
---|
841 | |
---|
842 | for (l = child_list, i = 0; l; l = l->next) { |
---|
843 | i++; |
---|
844 | } |
---|
845 | |
---|
846 | /* Number of client processes. */ |
---|
847 | fprintf(fp, "%d\n", i); |
---|
848 | |
---|
849 | for (l = child_list; l; l = l->next) { |
---|
850 | fprintf(fp, "%d %d\n", (int) ((struct bitlbee_child*) l->data)->pid, |
---|
851 | ((struct bitlbee_child*) l->data)->ipc_fd); |
---|
852 | } |
---|
853 | |
---|
854 | if (fclose(fp) == 0) { |
---|
855 | return fn; |
---|
856 | } else { |
---|
857 | unlink(fn); |
---|
858 | g_free(fn); |
---|
859 | return NULL; |
---|
860 | } |
---|
861 | } |
---|
862 | |
---|
863 | |
---|
864 | static gboolean new_ipc_client(gpointer data, gint serversock, b_input_condition cond) |
---|
865 | { |
---|
866 | struct bitlbee_child *child = g_new0(struct bitlbee_child, 1); |
---|
867 | |
---|
868 | child->to_fd = -1; |
---|
869 | child->ipc_fd = accept(serversock, NULL, 0); |
---|
870 | if (child->ipc_fd == -1) { |
---|
871 | log_message(LOGLVL_WARNING, "Unable to accept connection on UNIX domain socket: %s", strerror(errno)); |
---|
872 | return TRUE; |
---|
873 | } |
---|
874 | |
---|
875 | child->ipc_inpa = b_input_add(child->ipc_fd, B_EV_IO_READ, ipc_master_read, child); |
---|
876 | |
---|
877 | child_list = g_slist_prepend(child_list, child); |
---|
878 | |
---|
879 | return TRUE; |
---|
880 | } |
---|
881 | |
---|
882 | int ipc_master_listen_socket() |
---|
883 | { |
---|
884 | struct sockaddr_un un_addr; |
---|
885 | int serversock; |
---|
886 | |
---|
887 | if (!IPCSOCKET || !*IPCSOCKET) { |
---|
888 | return 1; |
---|
889 | } |
---|
890 | |
---|
891 | /* Clean up old socket files that were hanging around.. */ |
---|
892 | if (unlink(IPCSOCKET) == -1 && errno != ENOENT) { |
---|
893 | log_message(LOGLVL_ERROR, "Could not remove old IPC socket at %s: %s", IPCSOCKET, strerror(errno)); |
---|
894 | return 0; |
---|
895 | } |
---|
896 | |
---|
897 | un_addr.sun_family = AF_UNIX; |
---|
898 | strcpy(un_addr.sun_path, IPCSOCKET); |
---|
899 | |
---|
900 | serversock = socket(AF_UNIX, SOCK_STREAM, PF_UNIX); |
---|
901 | |
---|
902 | if (serversock == -1) { |
---|
903 | log_message(LOGLVL_WARNING, "Unable to create UNIX socket: %s", strerror(errno)); |
---|
904 | return 0; |
---|
905 | } |
---|
906 | |
---|
907 | if (bind(serversock, (struct sockaddr *) &un_addr, sizeof(un_addr)) == -1) { |
---|
908 | log_message(LOGLVL_WARNING, "Unable to bind UNIX socket to %s: %s", IPCSOCKET, strerror(errno)); |
---|
909 | return 0; |
---|
910 | } |
---|
911 | |
---|
912 | if (listen(serversock, 5) == -1) { |
---|
913 | log_message(LOGLVL_WARNING, "Unable to listen on UNIX socket: %s", strerror(errno)); |
---|
914 | return 0; |
---|
915 | } |
---|
916 | |
---|
917 | b_input_add(serversock, B_EV_IO_READ, new_ipc_client, NULL); |
---|
918 | |
---|
919 | return 1; |
---|
920 | } |
---|
921 | |
---|
922 | int ipc_master_load_state(char *statefile) |
---|
923 | { |
---|
924 | struct bitlbee_child *child; |
---|
925 | FILE *fp; |
---|
926 | int i, n; |
---|
927 | |
---|
928 | if (statefile == NULL) { |
---|
929 | return 0; |
---|
930 | } |
---|
931 | |
---|
932 | fp = fopen(statefile, "r"); |
---|
933 | unlink(statefile); /* Why do it later? :-) */ |
---|
934 | if (fp == NULL) { |
---|
935 | return 0; |
---|
936 | } |
---|
937 | |
---|
938 | if (fscanf(fp, "%d", &n) != 1) { |
---|
939 | log_message(LOGLVL_WARNING, "Could not import state information for child processes."); |
---|
940 | fclose(fp); |
---|
941 | return 0; |
---|
942 | } |
---|
943 | |
---|
944 | log_message(LOGLVL_INFO, "Importing information for %d child processes.", n); |
---|
945 | for (i = 0; i < n; i++) { |
---|
946 | child = g_new0(struct bitlbee_child, 1); |
---|
947 | |
---|
948 | if (fscanf(fp, "%d %d", (int *) &child->pid, &child->ipc_fd) != 2) { |
---|
949 | log_message(LOGLVL_WARNING, "Unexpected end of file: Only processed %d clients.", i); |
---|
950 | g_free(child); |
---|
951 | fclose(fp); |
---|
952 | return 0; |
---|
953 | } |
---|
954 | child->ipc_inpa = b_input_add(child->ipc_fd, B_EV_IO_READ, ipc_master_read, child); |
---|
955 | child->to_fd = -1; |
---|
956 | |
---|
957 | child_list = g_slist_prepend(child_list, child); |
---|
958 | } |
---|
959 | |
---|
960 | ipc_to_children_str("HELLO\r\n"); |
---|
961 | ipc_to_children_str("OPERMSG :New %s master process started (version %s)\r\n", PACKAGE, BITLBEE_VERSION); |
---|
962 | |
---|
963 | fclose(fp); |
---|
964 | return 1; |
---|
965 | } |
---|