| 1 |
/* |
| 2 |
* Copyright (c) 2002-2003 Erik Fears |
| 3 |
* Copyright (c) 2014-2019 ircd-hybrid development team |
| 4 |
* |
| 5 |
* This program is free software; you can redistribute it and/or modify |
| 6 |
* it under the terms of the GNU General Public License as published by |
| 7 |
* the Free Software Foundation; either version 2 of the License, or |
| 8 |
* (at your option) any later version. |
| 9 |
* |
| 10 |
* This program is distributed in the hope that it will be useful, |
| 11 |
* but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 |
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 |
* GNU General Public License for more details. |
| 14 |
* |
| 15 |
* You should have received a copy of the GNU General Public License |
| 16 |
* along with this program; if not, write to the Free Software |
| 17 |
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 |
| 18 |
* USA |
| 19 |
*/ |
| 20 |
|
| 21 |
#include "setup.h" |
| 22 |
|
| 23 |
#include <stdio.h> |
| 24 |
#include <unistd.h> |
| 25 |
#include <stdlib.h> |
| 26 |
#include <string.h> |
| 27 |
#include <sys/types.h> |
| 28 |
#include <sys/socket.h> |
| 29 |
#include <netdb.h> |
| 30 |
#include <netinet/in.h> |
| 31 |
#include <arpa/inet.h> |
| 32 |
#include <poll.h> |
| 33 |
#include <time.h> |
| 34 |
#include <errno.h> |
| 35 |
#include <stdarg.h> |
| 36 |
#include <regex.h> |
| 37 |
#include <assert.h> |
| 38 |
|
| 39 |
#include "config.h" |
| 40 |
#include "irc.h" |
| 41 |
#include "log.h" |
| 42 |
#include "opercmd.h" |
| 43 |
#include "scan.h" |
| 44 |
#include "dnsbl.h" |
| 45 |
#include "stats.h" |
| 46 |
#include "options.h" |
| 47 |
#include "match.h" |
| 48 |
#include "compat.h" |
| 49 |
#include "negcache.h" |
| 50 |
#include "memory.h" |
| 51 |
#include "main.h" |
| 52 |
#include "serno.h" |
| 53 |
|
| 54 |
|
| 55 |
/* |
| 56 |
* Certain variables we don't want to allocate memory for over and over |
| 57 |
* again so global scope is given. |
| 58 |
*/ |
| 59 |
static char IRC_RAW[MSGLENMAX]; /* Buffer to read data into */ |
| 60 |
static unsigned int IRC_RAW_LEN; /* Position of IRC_RAW */ |
| 61 |
static int IRC_FD = -1; /* File descriptor for IRC client */ |
| 62 |
|
| 63 |
static struct sockaddr_storage IRC_SVR; /* Sock Address Struct for IRC server */ |
| 64 |
static socklen_t svr_addrlen; |
| 65 |
static time_t IRC_LAST; /* Last full line of data from irc server */ |
| 66 |
static time_t IRC_LASTRECONNECT; /* Time of last reconnection */ |
| 67 |
|
| 68 |
|
| 69 |
/* get_channel |
| 70 |
* |
| 71 |
* Check if a channel is defined in our conf. If so return |
| 72 |
* a pointer to it. |
| 73 |
* |
| 74 |
* Parameters: |
| 75 |
* channel: channel to search conf for |
| 76 |
* |
| 77 |
* Return: Pointer to ChannelConf containing the channel |
| 78 |
*/ |
| 79 |
static const struct ChannelConf * |
| 80 |
get_channel(const char *name) |
| 81 |
{ |
| 82 |
node_t *node; |
| 83 |
|
| 84 |
LIST_FOREACH(node, IRCItem.channels.head) |
| 85 |
{ |
| 86 |
struct ChannelConf *item = node->data; |
| 87 |
|
| 88 |
if (strcasecmp(item->name, name) == 0) |
| 89 |
return item; |
| 90 |
} |
| 91 |
|
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return NULL; |
| 93 |
} |
| 94 |
|
| 95 |
/* m_perform |
| 96 |
* |
| 97 |
* actions to perform on IRC connection |
| 98 |
* |
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* Parameters: |
| 100 |
* parv[0] = source |
| 101 |
* parv[1] = PING |
| 102 |
* parv[2] = PING TS/Package |
| 103 |
* |
| 104 |
* source_p: UserInfo struct of the source user, or NULL if |
| 105 |
* the source (parv[0]) is a server. |
| 106 |
*/ |
| 107 |
static void |
| 108 |
m_perform(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 109 |
{ |
| 110 |
node_t *node; |
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|
| 112 |
log_printf("IRC -> Connected to %s/%d", IRCItem.server, IRCItem.port); |
| 113 |
|
| 114 |
/* Identify to nickserv if needed */ |
| 115 |
if (!EmptyString(IRCItem.nickserv)) |
| 116 |
irc_send("%s", IRCItem.nickserv); |
| 117 |
|
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/* Oper */ |
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irc_send("OPER %s", IRCItem.oper); |
| 120 |
|
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/* Set modes */ |
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irc_send("MODE %s %s", IRCItem.nick, IRCItem.mode); |
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|
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/* Set Away */ |
| 125 |
if (!EmptyString(IRCItem.away)) |
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irc_send("AWAY :%s", IRCItem.away); |
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|
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/* Perform */ |
| 129 |
LIST_FOREACH(node, IRCItem.performs.head) |
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irc_send("%s", node->data); |
| 131 |
|
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/* Join all listed channels. */ |
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LIST_FOREACH(node, IRCItem.channels.head) |
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{ |
| 135 |
const struct ChannelConf *channel = node->data; |
| 136 |
|
| 137 |
if (EmptyString(channel->name)) |
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continue; |
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|
| 140 |
if (!EmptyString(channel->key)) |
| 141 |
irc_send("JOIN %s %s", channel->name, channel->key); |
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else |
| 143 |
irc_send("JOIN %s", channel->name); |
| 144 |
} |
| 145 |
} |
| 146 |
|
| 147 |
/* m_ping |
| 148 |
* |
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* parv[0] = source |
| 150 |
* parv[1] = PING |
| 151 |
* parv[2] = PING TS/Package |
| 152 |
* |
| 153 |
* source_p: UserInfo struct of the source user, or NULL if |
| 154 |
* the source (parv[0]) is a server. |
| 155 |
*/ |
| 156 |
static void |
| 157 |
m_ping(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 158 |
{ |
| 159 |
if (parc < 3) |
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return; |
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|
| 162 |
if (OPT_DEBUG >= 2) |
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log_printf("IRC -> PING? PONG!"); |
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|
| 165 |
irc_send("PONG %s", parv[2]); |
| 166 |
} |
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|
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/* m_invite |
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* |
| 170 |
* parv[0] = source |
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* parv[1] = INVITE |
| 172 |
* parv[2] = target |
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* parv[3] = channel |
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* |
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* source_p: UserInfo struct of the source user, or NULL if |
| 176 |
* the source (parv[0]) is a server. |
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*/ |
| 178 |
static void |
| 179 |
m_invite(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 180 |
{ |
| 181 |
const struct ChannelConf *channel = NULL; |
| 182 |
|
| 183 |
if (parc < 4) |
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return; |
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|
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log_printf("IRC -> Invited to %s by %s", parv[3], parv[0]); |
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|
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if ((channel = get_channel(parv[3])) == NULL) |
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return; |
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|
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irc_send("JOIN %s %s", channel->name, channel->key); |
| 192 |
} |
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|
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/* m_ctcp |
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* parv[0] = source |
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* parv[1] = PRIVMSG |
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* parv[2] = target (channel or user) |
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* parv[3] = message |
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* |
| 200 |
* source_p: UserInfo struct of the source user, or NULL if |
| 201 |
* the source (parv[0]) is a server. |
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*/ |
| 203 |
static void |
| 204 |
m_ctcp(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
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{ |
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if (strncasecmp(parv[3], "\001VERSION\001", 9) == 0) |
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irc_send("NOTICE %s :\001VERSION Hybrid Open Proxy Monitor %s(%s)\001", |
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source_p, VERSION, SERIALNUM); |
| 209 |
} |
| 210 |
|
| 211 |
/* m_privmsg |
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* |
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* parv[0] = source |
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* parv[1] = PRIVMSG |
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* parv[2] = target (channel or user) |
| 216 |
* parv[3] = message |
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* |
| 218 |
* source_p: UserInfo struct of the source user, or NULL if |
| 219 |
* the source (parv[0]) is a server. |
| 220 |
*/ |
| 221 |
static void |
| 222 |
m_privmsg(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 223 |
{ |
| 224 |
const struct ChannelConf *channel = NULL; |
| 225 |
|
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if (source_p == NULL) |
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return; |
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|
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if (parc < 4) |
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return; |
| 231 |
|
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/* CTCP */ |
| 233 |
if (*parv[3] == '\001') |
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{ |
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m_ctcp(parv, parc, msg, source_p); |
| 236 |
return; |
| 237 |
} |
| 238 |
|
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/* Only interested in privmsg to channels */ |
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if (*parv[2] != '#' && *parv[2] != '&') |
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return; |
| 242 |
|
| 243 |
/* Get a target */ |
| 244 |
if ((channel = get_channel(parv[2])) == NULL) |
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return; |
| 246 |
|
| 247 |
int hit = strncasecmp(parv[3], "!all ", 5) == 0; |
| 248 |
if (hit == 0) |
| 249 |
{ |
| 250 |
size_t nick_len = strlen(IRCItem.nick); |
| 251 |
|
| 252 |
if (strncasecmp(parv[3], IRCItem.nick, nick_len) == 0) |
| 253 |
hit = *(parv[3] + nick_len) == ' ' || |
| 254 |
*(parv[3] + nick_len) == ',' || |
| 255 |
*(parv[3] + nick_len) == ':'; |
| 256 |
} |
| 257 |
|
| 258 |
if (hit) |
| 259 |
/* XXX command_parse will alter parv[3]. */ |
| 260 |
command_parse(parv[3], channel->name, source_p); |
| 261 |
} |
| 262 |
|
| 263 |
/* m_notice |
| 264 |
* |
| 265 |
* parv[0] = source |
| 266 |
* parv[1] = NOTICE |
| 267 |
* parv[2] = target |
| 268 |
* parv[3] = message |
| 269 |
* |
| 270 |
* |
| 271 |
* source_p: UserInfo struct of the source user, or NULL if |
| 272 |
* the source (parv[0]) is a server. |
| 273 |
*/ |
| 274 |
static void |
| 275 |
m_notice(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 276 |
{ |
| 277 |
static regex_t *preg = NULL; |
| 278 |
regmatch_t pmatch[5]; |
| 279 |
int errnum; |
| 280 |
const char *user[4]; |
| 281 |
const node_t *node; |
| 282 |
|
| 283 |
/* Not interested in notices from users */ |
| 284 |
if (source_p) |
| 285 |
return; |
| 286 |
|
| 287 |
if (parc < 4) |
| 288 |
return; |
| 289 |
|
| 290 |
/* Compile the regular expression if it has not been already */ |
| 291 |
if (preg == NULL) |
| 292 |
{ |
| 293 |
preg = xcalloc(sizeof(*preg)); |
| 294 |
|
| 295 |
if ((errnum = regcomp(preg, IRCItem.connregex, REG_ICASE | REG_EXTENDED))) |
| 296 |
{ |
| 297 |
char errmsg[256]; |
| 298 |
|
| 299 |
regerror(errnum, preg, errmsg, sizeof(errmsg)); |
| 300 |
log_printf("IRC REGEX -> Error when compiling regular expression: %s", errmsg); |
| 301 |
|
| 302 |
xfree(preg); |
| 303 |
preg = NULL; |
| 304 |
return; |
| 305 |
} |
| 306 |
} |
| 307 |
|
| 308 |
/* Match the expression against the possible connection notice */ |
| 309 |
if (regexec(preg, parv[3], 5, pmatch, 0)) |
| 310 |
return; |
| 311 |
|
| 312 |
if (OPT_DEBUG > 0) |
| 313 |
log_printf("IRC REGEX -> Regular expression caught connection notice. Parsing."); |
| 314 |
|
| 315 |
if (pmatch[4].rm_so == -1) |
| 316 |
{ |
| 317 |
log_printf("IRC REGEX -> pmatch[4].rm_so is -1 while parsing??? Aborting."); |
| 318 |
return; |
| 319 |
} |
| 320 |
|
| 321 |
/* |
| 322 |
* Offsets for data in the connection notice: |
| 323 |
* |
| 324 |
* NICKNAME: pmatch[1].rm_so TO pmatch[1].rm_eo |
| 325 |
* USERNAME: pmatch[2].rm_so TO pmatch[2].rm_eo |
| 326 |
* HOSTNAME: pmatch[3].rm_so TO pmatch[3].rm_eo |
| 327 |
* IP : pmatch[4].rm_so TO pmatch[4].rm_eo |
| 328 |
*/ |
| 329 |
for (unsigned int i = 0; i < 4; ++i) |
| 330 |
{ |
| 331 |
user[i] = (parv[3] + pmatch[i + 1].rm_so); |
| 332 |
*(parv[3] + pmatch[i + 1].rm_eo) = '\0'; |
| 333 |
} |
| 334 |
|
| 335 |
if (OPT_DEBUG > 0) |
| 336 |
log_printf("IRC REGEX -> Parsed %s!%s@%s [%s] from connection notice.", |
| 337 |
user[0], user[1], user[2], user[3]); |
| 338 |
|
| 339 |
LIST_FOREACH(node, IRCItem.notices.head) |
| 340 |
irc_send("NOTICE %s :%s", user[0], node->data); |
| 341 |
|
| 342 |
/* Pass this information off to scan.c */ |
| 343 |
scan_connect(user, msg); |
| 344 |
|
| 345 |
/* Record the connect for stats purposes */ |
| 346 |
stats_connect(); |
| 347 |
} |
| 348 |
|
| 349 |
/* m_userhost |
| 350 |
* |
| 351 |
* parv[0] = source |
| 352 |
* parv[1] = USERHOST |
| 353 |
* parv[2] = target (hopm) |
| 354 |
* parv[3] = :nick=(flags)user@host |
| 355 |
* |
| 356 |
* |
| 357 |
* source_p: UserInfo struct of the source user, or NULL if |
| 358 |
* the source (parv[0]) is a server. |
| 359 |
*/ |
| 360 |
static void |
| 361 |
m_userhost(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 362 |
{ |
| 363 |
if (parc < 4) |
| 364 |
return; |
| 365 |
|
| 366 |
command_userhost(parv[3]); |
| 367 |
} |
| 368 |
|
| 369 |
/* m_cannot_join |
| 370 |
* |
| 371 |
* parv[0] = source |
| 372 |
* parv[1] = numeric |
| 373 |
* parv[2] = target (hopm) |
| 374 |
* parv[3] = channel |
| 375 |
* parv[4] = error text |
| 376 |
*/ |
| 377 |
static void |
| 378 |
m_cannot_join(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 379 |
{ |
| 380 |
const struct ChannelConf *channel = NULL; |
| 381 |
|
| 382 |
if (parc < 5) |
| 383 |
return; |
| 384 |
|
| 385 |
/* Is it one of our channels? */ |
| 386 |
if ((channel = get_channel(parv[3])) == NULL) |
| 387 |
return; |
| 388 |
|
| 389 |
if (EmptyString(channel->invite)) |
| 390 |
return; |
| 391 |
|
| 392 |
irc_send("%s", channel->invite); |
| 393 |
} |
| 394 |
|
| 395 |
/* m_kill |
| 396 |
* |
| 397 |
* parv[0] = source |
| 398 |
* parv[1] = numeric |
| 399 |
* parv[2] = target (hopm) |
| 400 |
* parv[3] = channel |
| 401 |
* parv[4] = error text |
| 402 |
*/ |
| 403 |
static void |
| 404 |
m_kill(char *parv[], unsigned int parc, const char *msg, const char *source_p) |
| 405 |
{ |
| 406 |
/* Restart hopm to rehash */ |
| 407 |
main_restart(); |
| 408 |
} |
| 409 |
|
| 410 |
/* userinfo_create |
| 411 |
* |
| 412 |
* Parse a nick!user@host into a UserInfo struct |
| 413 |
* and return a pointer to the new struct. |
| 414 |
* |
| 415 |
* Parameters: |
| 416 |
* source: nick!user@host to parse |
| 417 |
* |
| 418 |
* Return: |
| 419 |
* pointer to new UserInfo struct, or NULL if parsing failed |
| 420 |
*/ |
| 421 |
static const char * |
| 422 |
userinfo_create(const char *source) |
| 423 |
{ |
| 424 |
static char name[MSGLENMAX]; |
| 425 |
unsigned int has_user = 0; |
| 426 |
unsigned int has_host = 0; |
| 427 |
|
| 428 |
strlcpy(name, source, sizeof(name)); |
| 429 |
|
| 430 |
for (char *p = name; *p; ++p) |
| 431 |
{ |
| 432 |
if (*p == '!') |
| 433 |
{ |
| 434 |
*p = '\0'; |
| 435 |
++has_user; |
| 436 |
continue; |
| 437 |
} |
| 438 |
|
| 439 |
if (*p == '@' && has_user) |
| 440 |
{ |
| 441 |
++has_host; |
| 442 |
continue; |
| 443 |
} |
| 444 |
} |
| 445 |
|
| 446 |
if (has_user == 1 && has_host == 1) |
| 447 |
return name; |
| 448 |
return NULL; |
| 449 |
}; |
| 450 |
|
| 451 |
/* irc_init |
| 452 |
* |
| 453 |
* Resolve IRC host and perform other initialization. |
| 454 |
* |
| 455 |
* Parameters: |
| 456 |
* None |
| 457 |
* |
| 458 |
* Return: |
| 459 |
* None |
| 460 |
*/ |
| 461 |
static void |
| 462 |
irc_init(void) |
| 463 |
{ |
| 464 |
const void *address = NULL; |
| 465 |
|
| 466 |
assert(IRC_FD == -1); |
| 467 |
|
| 468 |
memset(&IRC_SVR, 0, sizeof(IRC_SVR)); |
| 469 |
|
| 470 |
/* Resolve IRC host. */ |
| 471 |
if ((address = firedns_resolveip6(IRCItem.server))) |
| 472 |
{ |
| 473 |
struct sockaddr_in6 *in = (struct sockaddr_in6 *)&IRC_SVR; |
| 474 |
|
| 475 |
svr_addrlen = sizeof(*in); |
| 476 |
IRC_SVR.ss_family = AF_INET6; |
| 477 |
in->sin6_port = htons(IRCItem.port); |
| 478 |
memcpy(&in->sin6_addr, address, sizeof(in->sin6_addr)); |
| 479 |
} |
| 480 |
else if ((address = firedns_resolveip4(IRCItem.server))) |
| 481 |
{ |
| 482 |
struct sockaddr_in *in = (struct sockaddr_in *)&IRC_SVR; |
| 483 |
|
| 484 |
svr_addrlen = sizeof(*in); |
| 485 |
IRC_SVR.ss_family = AF_INET; |
| 486 |
in->sin_port = htons(IRCItem.port); |
| 487 |
memcpy(&in->sin_addr, address, sizeof(in->sin_addr)); |
| 488 |
} |
| 489 |
else |
| 490 |
{ |
| 491 |
log_printf("IRC -> firedns_resolveip(\"%s\"): %s", IRCItem.server, |
| 492 |
firedns_strerror(firedns_errno)); |
| 493 |
exit(EXIT_FAILURE); |
| 494 |
} |
| 495 |
|
| 496 |
/* Request file desc for IRC client socket */ |
| 497 |
IRC_FD = socket(IRC_SVR.ss_family, SOCK_STREAM, 0); |
| 498 |
|
| 499 |
if (IRC_FD == -1) |
| 500 |
{ |
| 501 |
log_printf("IRC -> socket(): error creating socket: %s", strerror(errno)); |
| 502 |
exit(EXIT_FAILURE); |
| 503 |
} |
| 504 |
|
| 505 |
/* Bind */ |
| 506 |
if (!EmptyString(IRCItem.vhost)) |
| 507 |
{ |
| 508 |
struct addrinfo hints, *res; |
| 509 |
int n; |
| 510 |
|
| 511 |
memset(&hints, 0, sizeof(hints)); |
| 512 |
|
| 513 |
hints.ai_family = AF_UNSPEC; |
| 514 |
hints.ai_socktype = SOCK_STREAM; |
| 515 |
hints.ai_flags = AI_NUMERICHOST; |
| 516 |
|
| 517 |
if ((n = getaddrinfo(IRCItem.vhost, NULL, &hints, &res))) |
| 518 |
{ |
| 519 |
log_printf("IRC -> error binding to %s: %s", IRCItem.vhost, gai_strerror(n)); |
| 520 |
exit(EXIT_FAILURE); |
| 521 |
} |
| 522 |
else if (bind(IRC_FD, res->ai_addr, res->ai_addrlen)) |
| 523 |
{ |
| 524 |
log_printf("IRC -> error binding to %s: %s", IRCItem.vhost, strerror(errno)); |
| 525 |
exit(EXIT_FAILURE); |
| 526 |
} |
| 527 |
|
| 528 |
freeaddrinfo(res); |
| 529 |
} |
| 530 |
} |
| 531 |
|
| 532 |
/* irc_reconnect |
| 533 |
* |
| 534 |
* Close connection to IRC server. |
| 535 |
* |
| 536 |
* Parameters: NONE |
| 537 |
* |
| 538 |
* Return: NONE |
| 539 |
*/ |
| 540 |
static void |
| 541 |
irc_reconnect(void) |
| 542 |
{ |
| 543 |
time_t present; |
| 544 |
|
| 545 |
time(&present); |
| 546 |
|
| 547 |
/* Only try to reconnect every IRCItem.reconnectinterval seconds */ |
| 548 |
if ((present - IRC_LASTRECONNECT) < IRCItem.reconnectinterval) |
| 549 |
{ |
| 550 |
/* Sleep to avoid excessive CPU */ |
| 551 |
sleep(1); |
| 552 |
return; |
| 553 |
} |
| 554 |
|
| 555 |
time(&IRC_LASTRECONNECT); |
| 556 |
|
| 557 |
if (IRC_FD > -1) |
| 558 |
{ |
| 559 |
close(IRC_FD); |
| 560 |
IRC_FD = -1; /* Set IRC_FD -1 for reconnection on next irc_cycle(). */ |
| 561 |
} |
| 562 |
|
| 563 |
log_printf("IRC -> Connection to (%s) failed, reconnecting.", IRCItem.server); |
| 564 |
} |
| 565 |
|
| 566 |
/* irc_connect |
| 567 |
* |
| 568 |
* Connect to IRC server. |
| 569 |
* XXX: FD allocation done here |
| 570 |
* |
| 571 |
* Parameters: NONE |
| 572 |
* Return: NONE |
| 573 |
*/ |
| 574 |
static void |
| 575 |
irc_connect(void) |
| 576 |
{ |
| 577 |
/* Connect to IRC server as client. */ |
| 578 |
if (connect(IRC_FD, (struct sockaddr *)&IRC_SVR, svr_addrlen) == -1) |
| 579 |
{ |
| 580 |
log_printf("IRC -> connect(): error connecting to %s: %s", |
| 581 |
IRCItem.server, strerror(errno)); |
| 582 |
|
| 583 |
if (errno == EISCONN /* Already connected */ || errno == EALREADY /* Previous attempt not complete */) |
| 584 |
return; |
| 585 |
|
| 586 |
/* Try to connect again */ |
| 587 |
irc_reconnect(); |
| 588 |
return; |
| 589 |
} |
| 590 |
|
| 591 |
irc_send("NICK %s", IRCItem.nick); |
| 592 |
|
| 593 |
if (!EmptyString(IRCItem.password)) |
| 594 |
irc_send("PASS %s", IRCItem.password); |
| 595 |
|
| 596 |
irc_send("USER %s %s %s :%s", |
| 597 |
IRCItem.username, |
| 598 |
IRCItem.username, |
| 599 |
IRCItem.username, |
| 600 |
IRCItem.realname); |
| 601 |
time(&IRC_LAST); |
| 602 |
} |
| 603 |
|
| 604 |
/* irc_parse |
| 605 |
* |
| 606 |
* irc_parse is called by irc_read when a full line of data |
| 607 |
* is ready to be parsed. |
| 608 |
* |
| 609 |
* Parameters: NONE |
| 610 |
* Return: NONE |
| 611 |
*/ |
| 612 |
static void |
| 613 |
irc_parse(void) |
| 614 |
{ |
| 615 |
char *pos; |
| 616 |
|
| 617 |
/* |
| 618 |
* parv stores the parsed token, parc is the count of the parsed |
| 619 |
* tokens |
| 620 |
* |
| 621 |
* parv[0] is ALWAYS the source, and is the server name of the |
| 622 |
* source did not exist |
| 623 |
*/ |
| 624 |
char *parv[17]; |
| 625 |
unsigned int parc = 1; |
| 626 |
char msg[MSGLENMAX]; /* Temporarily stores IRC msg to pass to handlers */ |
| 627 |
|
| 628 |
struct CommandHash |
| 629 |
{ |
| 630 |
const char *command; |
| 631 |
void (*handler)(char *[], unsigned int, const char *, const char *); |
| 632 |
}; |
| 633 |
|
| 634 |
/* |
| 635 |
* Table should be ordered with most occuring (or priority) |
| 636 |
* commands at the top of the list. |
| 637 |
*/ |
| 638 |
static const struct CommandHash COMMAND_TABLE[] = |
| 639 |
{ |
| 640 |
{ .command = "NOTICE", .handler = m_notice }, |
| 641 |
{ .command = "PRIVMSG", .handler = m_privmsg }, |
| 642 |
{ .command = "PING", .handler = m_ping }, |
| 643 |
{ .command = "INVITE", .handler = m_invite }, |
| 644 |
{ .command = "001", .handler = m_perform }, |
| 645 |
{ .command = "302", .handler = m_userhost }, |
| 646 |
{ .command = "471", .handler = m_cannot_join }, |
| 647 |
{ .command = "473", .handler = m_cannot_join }, |
| 648 |
{ .command = "474", .handler = m_cannot_join }, |
| 649 |
{ .command = "475", .handler = m_cannot_join }, |
| 650 |
{ .command = "KILL", .handler = m_kill }, |
| 651 |
{ .command = NULL } |
| 652 |
}; |
| 653 |
|
| 654 |
if (IRC_RAW_LEN == 0) |
| 655 |
return; |
| 656 |
|
| 657 |
if (OPT_DEBUG >= 2) |
| 658 |
log_printf("IRC READ -> %s", IRC_RAW); |
| 659 |
|
| 660 |
time(&IRC_LAST); |
| 661 |
|
| 662 |
/* Store a copy of IRC_RAW for the handlers (for functions that need PROOF) */ |
| 663 |
strlcpy(msg, IRC_RAW, sizeof(msg)); |
| 664 |
|
| 665 |
/* parv[0] is always the source */ |
| 666 |
if (IRC_RAW[0] == ':') |
| 667 |
parv[0] = IRC_RAW + 1; |
| 668 |
else |
| 669 |
{ |
| 670 |
parv[0] = IRCItem.server; |
| 671 |
parv[parc++] = IRC_RAW; |
| 672 |
} |
| 673 |
|
| 674 |
pos = IRC_RAW; |
| 675 |
|
| 676 |
while ((pos = strchr(pos, ' ')) && parc <= 17) |
| 677 |
{ |
| 678 |
/* Avoid excessive spaces and end of IRC_RAW */ |
| 679 |
if (*(pos + 1) == ' ' || *(pos + 1) == '\0') |
| 680 |
{ |
| 681 |
pos++; |
| 682 |
continue; |
| 683 |
} |
| 684 |
|
| 685 |
/* Anything after a : is considered the final string of the message */ |
| 686 |
if (*(pos + 1) == ':') |
| 687 |
{ |
| 688 |
parv[parc++] = pos + 2; |
| 689 |
*pos = '\0'; |
| 690 |
break; |
| 691 |
} |
| 692 |
|
| 693 |
/* |
| 694 |
* Set the next parv at this position and replace the space with a |
| 695 |
* \0 for the previous parv |
| 696 |
*/ |
| 697 |
parv[parc++] = pos + 1; |
| 698 |
*pos = '\0'; |
| 699 |
pos++; |
| 700 |
} |
| 701 |
|
| 702 |
/* |
| 703 |
* Determine which command this is from the command table |
| 704 |
* and let the handler for that command take control |
| 705 |
*/ |
| 706 |
for (const struct CommandHash *cmd = COMMAND_TABLE; cmd->command; ++cmd) |
| 707 |
{ |
| 708 |
if (strcasecmp(cmd->command, parv[1]) == 0) |
| 709 |
{ |
| 710 |
cmd->handler(parv, parc, msg, userinfo_create(parv[0])); |
| 711 |
break; |
| 712 |
} |
| 713 |
} |
| 714 |
} |
| 715 |
|
| 716 |
/* irc_read |
| 717 |
* |
| 718 |
* irc_read is called by irc_cycle when new data is ready to be |
| 719 |
* read from the irc server. |
| 720 |
* |
| 721 |
* Parameters: NONE |
| 722 |
* Return: NONE |
| 723 |
*/ |
| 724 |
static void |
| 725 |
irc_read(void) |
| 726 |
{ |
| 727 |
ssize_t len; |
| 728 |
char c; |
| 729 |
|
| 730 |
while ((len = read(IRC_FD, &c, 1)) > 0) |
| 731 |
{ |
| 732 |
if (c == '\r') |
| 733 |
continue; |
| 734 |
|
| 735 |
if (c == '\n') |
| 736 |
{ |
| 737 |
/* Null string. */ |
| 738 |
IRC_RAW[IRC_RAW_LEN] = '\0'; |
| 739 |
|
| 740 |
/* Parse line. */ |
| 741 |
irc_parse(); |
| 742 |
|
| 743 |
/* Reset counter. */ |
| 744 |
IRC_RAW_LEN = 0; |
| 745 |
break; |
| 746 |
} |
| 747 |
|
| 748 |
if (c != '\0') |
| 749 |
IRC_RAW[IRC_RAW_LEN++] = c; |
| 750 |
} |
| 751 |
|
| 752 |
if ((len <= 0) && (errno != EAGAIN)) |
| 753 |
{ |
| 754 |
if (errno != EINTR) |
| 755 |
log_printf("IRC -> Error reading data from server: %s", strerror(errno)); |
| 756 |
|
| 757 |
irc_reconnect(); |
| 758 |
IRC_RAW_LEN = 0; |
| 759 |
return; |
| 760 |
} |
| 761 |
} |
| 762 |
|
| 763 |
/* irc_cycle |
| 764 |
* |
| 765 |
* Pass control to the IRC portion of HOPM to handle any awaiting IRC events. |
| 766 |
* |
| 767 |
* Parameters: |
| 768 |
* None |
| 769 |
* |
| 770 |
* Return: |
| 771 |
* None |
| 772 |
*/ |
| 773 |
void |
| 774 |
irc_cycle(void) |
| 775 |
{ |
| 776 |
static struct pollfd pfd; |
| 777 |
|
| 778 |
if (IRC_FD == -1) |
| 779 |
{ |
| 780 |
/* Initialize negative cache. */ |
| 781 |
if (OptionsItem.negcache) |
| 782 |
negcache_init(); |
| 783 |
|
| 784 |
/* Resolve remote host. */ |
| 785 |
irc_init(); |
| 786 |
|
| 787 |
/* Connect to remote host. */ |
| 788 |
irc_connect(); |
| 789 |
return; /* In case connect() immediately failed */ |
| 790 |
} |
| 791 |
|
| 792 |
pfd.fd = IRC_FD; |
| 793 |
pfd.events = POLLIN; |
| 794 |
|
| 795 |
/* Block .050 seconds to avoid excessive CPU use on poll(). */ |
| 796 |
switch (poll(&pfd, 1, 50)) |
| 797 |
{ |
| 798 |
case 0: |
| 799 |
case -1: |
| 800 |
break; |
| 801 |
default: |
| 802 |
/* Check if IRC data is available. */ |
| 803 |
if (pfd.revents & POLLIN) |
| 804 |
irc_read(); |
| 805 |
else if (pfd.revents & (POLLERR | POLLHUP)) |
| 806 |
irc_reconnect(); |
| 807 |
|
| 808 |
break; |
| 809 |
} |
| 810 |
} |
| 811 |
|
| 812 |
/* irc_send |
| 813 |
* |
| 814 |
* Send data to remote IRC host. |
| 815 |
* |
| 816 |
* Parameters: |
| 817 |
* data: Format of data to send |
| 818 |
* ...: varargs to format with |
| 819 |
* |
| 820 |
* Return: NONE |
| 821 |
*/ |
| 822 |
void |
| 823 |
irc_send(const char *data, ...) |
| 824 |
{ |
| 825 |
va_list arglist; |
| 826 |
char buf[MSGLENMAX]; |
| 827 |
size_t len = 0; |
| 828 |
|
| 829 |
va_start(arglist, data); |
| 830 |
len = vsnprintf(buf, sizeof(buf), data, arglist); |
| 831 |
va_end(arglist); |
| 832 |
|
| 833 |
if (OPT_DEBUG >= 2) |
| 834 |
log_printf("IRC SEND -> %s", buf); |
| 835 |
|
| 836 |
if (len > 510) |
| 837 |
len = 510; |
| 838 |
|
| 839 |
buf[len++] = '\r'; |
| 840 |
buf[len++] = '\n'; |
| 841 |
|
| 842 |
if (send(IRC_FD, buf, len, 0) == -1) |
| 843 |
{ |
| 844 |
/* Return of -1 indicates error sending data; we reconnect. */ |
| 845 |
log_printf("IRC -> Error sending data to server: %s", strerror(errno)); |
| 846 |
irc_reconnect(); |
| 847 |
} |
| 848 |
} |
| 849 |
|
| 850 |
/* irc_send_channels |
| 851 |
* |
| 852 |
* Send privmsg to all channels. |
| 853 |
* |
| 854 |
* Parameters: |
| 855 |
* data: Format of data to send |
| 856 |
* ...: varargs to format with |
| 857 |
* |
| 858 |
* Return: NONE |
| 859 |
*/ |
| 860 |
void |
| 861 |
irc_send_channels(const char *data, ...) |
| 862 |
{ |
| 863 |
const node_t *node; |
| 864 |
va_list arglist; |
| 865 |
char buf[MSGLENMAX]; |
| 866 |
|
| 867 |
va_start(arglist, data); |
| 868 |
vsnprintf(buf, sizeof(buf), data, arglist); |
| 869 |
va_end(arglist); |
| 870 |
|
| 871 |
LIST_FOREACH(node, IRCItem.channels.head) |
| 872 |
{ |
| 873 |
const struct ChannelConf *chan = node->data; |
| 874 |
|
| 875 |
irc_send("PRIVMSG %s :%s", chan->name, buf); |
| 876 |
} |
| 877 |
} |
| 878 |
|
| 879 |
/* irc_timer |
| 880 |
* |
| 881 |
* Functions to be performed every ~seconds. |
| 882 |
* |
| 883 |
* Parameters: NONE |
| 884 |
* Return: NONE |
| 885 |
*/ |
| 886 |
void |
| 887 |
irc_timer(void) |
| 888 |
{ |
| 889 |
time_t present, delta; |
| 890 |
|
| 891 |
time(&present); |
| 892 |
|
| 893 |
delta = present - IRC_LAST; |
| 894 |
|
| 895 |
/* No data in IRCItem.readtimeout seconds */ |
| 896 |
if (delta >= IRCItem.readtimeout) |
| 897 |
{ |
| 898 |
log_printf("IRC -> Timeout awaiting data from server."); |
| 899 |
irc_reconnect(); |
| 900 |
|
| 901 |
/* Make sure we don't do this again for a while */ |
| 902 |
time(&IRC_LAST); |
| 903 |
} |
| 904 |
else if (delta >= IRCItem.readtimeout / 2) |
| 905 |
{ |
| 906 |
/* |
| 907 |
* Generate some data so high ping times don't cause uneeded |
| 908 |
* reconnections |
| 909 |
*/ |
| 910 |
irc_send("PING :HOPM"); |
| 911 |
} |
| 912 |
} |
