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root/svn/ircd-hybrid/trunk/src/conf_lexer.l
Revision: 3762
Committed: Sun Jun 1 19:35:16 2014 UTC (12 years, 4 months ago) by michael
File size: 19293 byte(s)
Log Message:
- Added INVITE flood protection/throttling as requested by Adam. This basically
  works similar as the KNOCK throttling algorithm.

File Contents

# Content
1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 2000-2014 ircd-hybrid development team
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
19 * USA
20 */
21
22 /*! \file ircd_lexer.l
23 * \brief Scans the ircd configuration file for tokens.
24 * \version $Id$
25 */
26
27 %option case-insensitive
28 %option noyywrap
29 %option nounput
30 %option never-interactive
31
32 %{
33 #include "stdinc.h"
34 #include "irc_string.h"
35 #include "conf.h"
36 #include "conf_parser.h" /* autogenerated header file */
37 #include "log.h"
38
39 #undef YY_INPUT
40 #define YY_FATAL_ERROR(msg) conf_yy_fatal_error(msg)
41 #define YY_INPUT(buf,result,max_size) \
42 if (!(result = conf_yy_input(buf, max_size))) \
43 YY_FATAL_ERROR("input in flex scanner failed");
44 #define MAX_INCLUDE_DEPTH 10
45
46
47 unsigned int lineno = 1;
48 char linebuf[IRCD_BUFSIZE];
49 char conffilebuf[IRCD_BUFSIZE];
50
51 static int include_stack_ptr = 0;
52 static YY_BUFFER_STATE include_stack[MAX_INCLUDE_DEPTH];
53 static unsigned int lineno_stack[MAX_INCLUDE_DEPTH];
54 static FILE *inc_fbfile_in[MAX_INCLUDE_DEPTH];
55 static char conffile_stack[MAX_INCLUDE_DEPTH][IRCD_BUFSIZE];
56 static void ccomment(void);
57 static void cinclude(void);
58 static int ieof(void);
59
60 static int
61 conf_yy_input(char *lbuf, unsigned int max_size)
62 {
63 return !fgets(lbuf, max_size, conf_parser_ctx.conf_file) ? 0 : strlen(lbuf);
64 }
65
66 static int
67 conf_yy_fatal_error(const char *msg)
68 {
69 return 0;
70 }
71
72 %}
73
74 WS [[:blank:]]*
75 DIGIT [[:digit:]]+
76 COMMENT ("//"|"#").*
77 qstring \"[^\"\n]*[\"\n]
78 include \.include{WS}(\<.*\>|\".*\")
79
80 %%
81 {include} { cinclude(); }
82 "/*" { ccomment(); }
83
84 \n.* { strlcpy(linebuf, yytext+1, sizeof(linebuf)); ++lineno; yyless(1); }
85
86 {WS} ;
87 {COMMENT} ;
88
89 {DIGIT} { yylval.number = atoi(yytext); return NUMBER; }
90
91 {qstring} { if (yytext[yyleng-2] == '\\')
92 {
93 yyless(yyleng-1); /* return last quote */
94 yymore(); /* append next string */
95 }
96 else
97 {
98 yylval.string = yytext+1;
99 if(yylval.string[yyleng-2] != '"')
100 ilog(LOG_TYPE_IRCD, "Unterminated character string");
101 else
102 {
103 int i,j;
104
105 yylval.string[yyleng-2] = '\0'; /* remove close
106 * quote
107 */
108
109 for (j=i=0 ;yylval.string[i] != '\0'; i++,j++)
110 {
111 if (yylval.string[i] != '\\')
112 {
113 yylval.string[j] = yylval.string[i];
114 }
115 else
116 {
117 i++;
118 if (yylval.string[i] == '\0') /* XXX
119 * should not
120 * happen
121 */
122 {
123 ilog(LOG_TYPE_IRCD,
124 "Unterminated character string");
125 break;
126 }
127 yylval.string[j] = yylval.string[i];
128 }
129 }
130 yylval.string[j] = '\0';
131 return QSTRING;
132 }
133 }
134 }
135
136 accept_password { return ACCEPT_PASSWORD; }
137 admin { return ADMIN; }
138 administrator { return ADMIN; }
139 aftype { return AFTYPE; }
140 all { return T_ALL; }
141 anti_nick_flood { return ANTI_NICK_FLOOD; }
142 anti_spam_exit_message_time { return ANTI_SPAM_EXIT_MESSAGE_TIME; }
143 auth { return IRCD_AUTH; }
144 autoconn { return AUTOCONN; }
145 bots { return T_BOTS; }
146 caller_id_wait { return CALLER_ID_WAIT; }
147 callerid { return T_CALLERID; }
148 can_flood { return CAN_FLOOD; }
149 cconn { return T_CCONN; }
150 channel { return CHANNEL; }
151 cidr_bitlen_ipv4 { return CIDR_BITLEN_IPV4; }
152 cidr_bitlen_ipv6 { return CIDR_BITLEN_IPV6; }
153 class { return CLASS; }
154 cluster { return T_CLUSTER; }
155 connect { return CONNECT; }
156 connectfreq { return CONNECTFREQ; }
157 cycle_on_host_change { return CYCLE_ON_HOST_CHANGE; }
158 deaf { return T_DEAF; }
159 debug { return T_DEBUG; }
160 default_floodcount { return DEFAULT_FLOODCOUNT; }
161 default_split_server_count { return DEFAULT_SPLIT_SERVER_COUNT; }
162 default_split_user_count { return DEFAULT_SPLIT_USER_COUNT; }
163 deny { return DENY; }
164 description { return DESCRIPTION; }
165 die { return DIE; }
166 disable_auth { return DISABLE_AUTH; }
167 disable_fake_channels { return DISABLE_FAKE_CHANNELS; }
168 disable_remote_commands { return DISABLE_REMOTE_COMMANDS; }
169 dline { return T_DLINE; }
170 dots_in_ident { return DOTS_IN_IDENT; }
171 egdpool_path { return EGDPOOL_PATH; }
172 email { return EMAIL; }
173 encrypted { return ENCRYPTED; }
174 exceed_limit { return EXCEED_LIMIT; }
175 exempt { return EXEMPT; }
176 external { return T_EXTERNAL; }
177 failed_oper_notice { return FAILED_OPER_NOTICE; }
178 farconnect { return T_FARCONNECT; }
179 file { return T_FILE; }
180 flags { return IRCD_FLAGS; }
181 flatten_links { return FLATTEN_LINKS; }
182 full { return T_FULL; }
183 gecos { return GECOS; }
184 general { return GENERAL; }
185 gline { return GLINE; }
186 gline_duration { return GLINE_DURATION; }
187 gline_enable { return GLINE_ENABLE; }
188 gline_exempt { return GLINE_EXEMPT; }
189 gline_min_cidr { return GLINE_MIN_CIDR; }
190 gline_min_cidr6 { return GLINE_MIN_CIDR6; }
191 gline_request_duration { return GLINE_REQUEST_DURATION; }
192 global_kill { return GLOBAL_KILL; }
193 globops { return T_GLOBOPS; }
194 have_ident { return NEED_IDENT; }
195 havent_read_conf { return HAVENT_READ_CONF; }
196 hidden { return HIDDEN; }
197 hidden_name { return HIDDEN_NAME; }
198 hidechans { return HIDE_CHANS; }
199 hideidle { return HIDE_IDLE; }
200 hide_idle_from_opers { return HIDE_IDLE_FROM_OPERS; }
201 hide_server_ips { return HIDE_SERVER_IPS; }
202 hide_servers { return HIDE_SERVERS; }
203 hide_services { return HIDE_SERVICES; }
204 hide_spoof_ips { return HIDE_SPOOF_IPS; }
205 host { return HOST; }
206 hub { return HUB; }
207 hub_mask { return HUB_MASK; }
208 ignore_bogus_ts { return IGNORE_BOGUS_TS; }
209 invisible { return T_INVISIBLE; }
210 invisible_on_connect { return INVISIBLE_ON_CONNECT; }
211 invite_delay { return INVITE_DELAY; }
212 invite_delay_channel { return INVITE_DELAY_CHANNEL; }
213 ip { return IP; }
214 ipv4 { return T_IPV4; }
215 ipv6 { return T_IPV6; }
216 join_flood_count { return JOIN_FLOOD_COUNT; }
217 join_flood_time { return JOIN_FLOOD_TIME; }
218 kill { return KILL; }
219 kill_chase_time_limit { return KILL_CHASE_TIME_LIMIT; }
220 kline { return KLINE; }
221 kline_exempt { return KLINE_EXEMPT; }
222 knock_delay { return KNOCK_DELAY; }
223 knock_delay_channel { return KNOCK_DELAY_CHANNEL; }
224 leaf_mask { return LEAF_MASK; }
225 links_delay { return LINKS_DELAY; }
226 listen { return LISTEN; }
227 locops { return T_LOCOPS; }
228 log { return T_LOG; }
229 mask { return MASK; }
230 masked { return TMASKED; }
231 max_accept { return MAX_ACCEPT; }
232 max_bans { return MAX_BANS; }
233 max_chans_per_oper { return MAX_CHANS_PER_OPER; }
234 max_chans_per_user { return MAX_CHANS_PER_USER; }
235 max_clients { return T_MAX_CLIENTS; }
236 max_global { return MAX_GLOBAL; }
237 max_ident { return MAX_IDENT; }
238 max_idle { return MAX_IDLE; }
239 max_local { return MAX_LOCAL; }
240 max_nick_changes { return MAX_NICK_CHANGES; }
241 max_nick_length { return MAX_NICK_LENGTH; }
242 max_nick_time { return MAX_NICK_TIME; }
243 max_number { return MAX_NUMBER; }
244 max_targets { return MAX_TARGETS; }
245 max_topic_length { return MAX_TOPIC_LENGTH; }
246 max_watch { return MAX_WATCH; }
247 min_idle { return MIN_IDLE; }
248 min_nonwildcard { return MIN_NONWILDCARD; }
249 min_nonwildcard_simple { return MIN_NONWILDCARD_SIMPLE; }
250 module { return MODULE; }
251 modules { return MODULES; }
252 motd { return MOTD; }
253 name { return NAME; }
254 nchange { return T_NCHANGE; }
255 need_ident { return NEED_IDENT; }
256 need_password { return NEED_PASSWORD; }
257 network_desc { return NETWORK_DESC; }
258 network_name { return NETWORK_NAME; }
259 nick { return NICK; }
260 no_create_on_split { return NO_CREATE_ON_SPLIT; }
261 no_join_on_split { return NO_JOIN_ON_SPLIT; }
262 no_oper_flood { return NO_OPER_FLOOD; }
263 no_tilde { return NO_TILDE; }
264 nononreg { return T_NONONREG; }
265 number_per_cidr { return NUMBER_PER_CIDR; }
266 number_per_ip { return NUMBER_PER_IP; }
267 oper { return OPERATOR; }
268 oper_only_umodes { return OPER_ONLY_UMODES; }
269 oper_pass_resv { return OPER_PASS_RESV; }
270 oper_umodes { return OPER_UMODES; }
271 operator { return OPERATOR; }
272 opers_bypass_callerid { return OPERS_BYPASS_CALLERID; }
273 operwall { return T_OPERWALL; }
274 pace_wait { return PACE_WAIT; }
275 pace_wait_simple { return PACE_WAIT_SIMPLE; }
276 passwd { return PASSWORD; }
277 password { return PASSWORD; }
278 path { return PATH; }
279 ping_cookie { return PING_COOKIE; }
280 ping_time { return PING_TIME; }
281 port { return PORT; }
282 quarantine { return RESV; }
283 random_idle { return RANDOM_IDLE; }
284 reason { return REASON; }
285 recvq { return T_RECVQ; }
286 redirport { return REDIRPORT; }
287 redirserv { return REDIRSERV; }
288 rehash { return REHASH; }
289 rej { return T_REJ; }
290 remote { return REMOTE; }
291 remoteban { return REMOTEBAN; }
292 restart { return T_RESTART; }
293 resv { return RESV; }
294 resv_exempt { return RESV_EXEMPT; }
295 rsa_private_key_file { return RSA_PRIVATE_KEY_FILE; }
296 rsa_public_key_file { return RSA_PUBLIC_KEY_FILE; }
297 send_password { return SEND_PASSWORD; }
298 sendq { return SENDQ; }
299 server { return T_SERVER; }
300 serverhide { return SERVERHIDE; }
301 serverinfo { return SERVERINFO; }
302 service { return T_SERVICE; }
303 services_name { return T_SERVICES_NAME; }
304 servnotice { return T_SERVNOTICE; }
305 set { return T_SET; }
306 shared { return T_SHARED; }
307 short_motd { return SHORT_MOTD; }
308 sid { return IRCD_SID; }
309 size { return T_SIZE; }
310 skill { return T_SKILL; }
311 softcallerid { return T_SOFTCALLERID; }
312 spoof { return SPOOF; }
313 spoof_notice { return SPOOF_NOTICE; }
314 spy { return T_SPY; }
315 squit { return SQUIT; }
316 ssl { return T_SSL; }
317 ssl_certificate_file { return SSL_CERTIFICATE_FILE; }
318 ssl_certificate_fingerprint { return SSL_CERTIFICATE_FINGERPRINT; }
319 ssl_cipher_list { return T_SSL_CIPHER_LIST; }
320 ssl_client_method { return T_SSL_CLIENT_METHOD; }
321 ssl_connection_required { return SSL_CONNECTION_REQUIRED; }
322 ssl_dh_param_file { return SSL_DH_PARAM_FILE; }
323 ssl_server_method { return T_SSL_SERVER_METHOD; }
324 sslv3 { return T_SSLV3; }
325 stats_e_disabled { return STATS_E_DISABLED; }
326 stats_i_oper_only { return STATS_I_OPER_ONLY; }
327 stats_k_oper_only { return STATS_K_OPER_ONLY; }
328 stats_o_oper_only { return STATS_O_OPER_ONLY; }
329 stats_P_oper_only { return STATS_P_OPER_ONLY; }
330 stats_u_oper_only { return STATS_U_OPER_ONLY; }
331 throttle_time { return THROTTLE_TIME; }
332 tkline_expire_notices { return TKLINE_EXPIRE_NOTICES; }
333 tlsv1 { return T_TLSV1; }
334 true_no_oper_flood { return TRUE_NO_OPER_FLOOD; }
335 ts_max_delta { return TS_MAX_DELTA; }
336 ts_warn_delta { return TS_WARN_DELTA; }
337 type { return TYPE; }
338 umodes { return T_UMODES; }
339 unauth { return T_UNAUTH; }
340 undline { return T_UNDLINE; }
341 unkline { return UNKLINE; }
342 unlimited { return T_UNLIMITED; }
343 unresv { return T_UNRESV; }
344 unxline { return T_UNXLINE; }
345 use_egd { return USE_EGD; }
346 use_logging { return USE_LOGGING; }
347 user { return USER; }
348 vhost { return VHOST; }
349 vhost6 { return VHOST6; }
350 wallop { return T_WALLOP; }
351 wallops { return T_WALLOPS; }
352 warn_no_connect_block { return WARN_NO_CONNECT_BLOCK; }
353 webirc { return T_WEBIRC; }
354 xline { return XLINE; }
355
356 yes { yylval.number = 1; return TBOOL; }
357 no { yylval.number = 0; return TBOOL; }
358
359 years { return YEARS; }
360 year { return YEARS; }
361 months { return MONTHS; }
362 month { return MONTHS; }
363 weeks { return WEEKS; }
364 week { return WEEKS; }
365 days { return DAYS; }
366 day { return DAYS; }
367 hours { return HOURS; }
368 hour { return HOURS; }
369 minutes { return MINUTES; }
370 minute { return MINUTES; }
371 seconds { return SECONDS; }
372 second { return SECONDS; }
373
374 bytes { return BYTES; }
375 byte { return BYTES; }
376 kilobytes { return KBYTES; }
377 kilobyte { return KBYTES; }
378 kbytes { return KBYTES; }
379 kbyte { return KBYTES; }
380 kb { return KBYTES; }
381 megabytes { return MBYTES; }
382 megabyte { return MBYTES; }
383 mbytes { return MBYTES; }
384 mbyte { return MBYTES; }
385 mb { return MBYTES; }
386 \.\. { return TWODOTS; }
387
388 . { return yytext[0]; }
389 <<EOF>> { if (ieof()) yyterminate(); }
390
391 %%
392
393 /* C-comment ignoring routine -kre*/
394 static void
395 ccomment(void)
396 {
397 int c = 0;
398
399 /* log(L_NOTICE, "got comment"); */
400 while (1)
401 {
402 while ((c = input()) != '*' && c != EOF)
403 if (c == '\n')
404 ++lineno;
405
406 if (c == '*')
407 {
408 while ((c = input()) == '*')
409 /* Nothing */ ;
410 if (c == '/')
411 break;
412 else if (c == '\n')
413 ++lineno;
414 }
415
416 if (c == EOF)
417 {
418 YY_FATAL_ERROR("EOF in comment");
419 /* XXX hack alert this disables
420 * the stupid unused function warning
421 * gcc generates
422 */
423 if (1 == 0)
424 yy_fatal_error("EOF in comment");
425 break;
426 }
427 }
428 }
429
430 /* C-style .includes. This function will properly swap input conf buffers,
431 * and lineno -kre */
432 static void
433 cinclude(void)
434 {
435 char *p = NULL;
436
437 if ((p = strchr(yytext, '<')) == NULL)
438 *strchr(p = strchr(yytext, '"') + 1, '"') = '\0';
439 else
440 *strchr(++p, '>') = '\0';
441
442 /* log(L_NOTICE, "got include %s!", c); */
443
444 /* do stacking and co. */
445 if (include_stack_ptr >= MAX_INCLUDE_DEPTH)
446 ilog(LOG_TYPE_IRCD, "Includes nested too deep in %s", p);
447 else
448 {
449 FILE *tmp_fbfile_in = NULL;
450 char filenamebuf[IRCD_BUFSIZE];
451
452 if (*p == '/') /* if it is an absolute path */
453 snprintf(filenamebuf, sizeof(filenamebuf), "%s", p);
454 else
455 snprintf(filenamebuf, sizeof(filenamebuf), "%s/%s", ETCPATH, p);
456
457 tmp_fbfile_in = fopen(filenamebuf, "r");
458
459 if (tmp_fbfile_in == NULL)
460 {
461 ilog(LOG_TYPE_IRCD, "Unable to read configuration file '%s': %s",
462 filenamebuf, strerror(errno));
463 return;
464 }
465
466 lineno_stack[include_stack_ptr] = lineno;
467 lineno = 1;
468 inc_fbfile_in[include_stack_ptr] = conf_parser_ctx.conf_file;
469 strlcpy(conffile_stack[include_stack_ptr], conffilebuf, IRCD_BUFSIZE);
470 include_stack[include_stack_ptr++] = YY_CURRENT_BUFFER;
471 conf_parser_ctx.conf_file = tmp_fbfile_in;
472 snprintf(conffilebuf, sizeof(conffilebuf), "%s", filenamebuf);
473 yy_switch_to_buffer(yy_create_buffer(yyin, YY_BUF_SIZE));
474 }
475 }
476
477 /* This is function that will be called on EOF in conf file. It will
478 * apropriately close conf if it not main conf and swap input buffers -kre
479 * */
480 static int
481 ieof(void)
482 {
483 /* log(L_NOTICE, "return from include stack!"); */
484 if (include_stack_ptr)
485 fclose(conf_parser_ctx.conf_file);
486 if (--include_stack_ptr < 0)
487 {
488 /* log(L_NOTICE, "terminating lexer"); */
489 /* We will now exit the lexer - restore init values if we get /rehash
490 * later and reenter lexer -kre */
491 include_stack_ptr = 0;
492 lineno = 1;
493 return 1;
494 }
495
496 /* switch buffer */
497 /* log(L_NOTICE, "deleting include_stack_ptr=%d", include_stack_ptr); */
498 yy_delete_buffer(YY_CURRENT_BUFFER);
499 lineno = lineno_stack[include_stack_ptr];
500 conf_parser_ctx.conf_file = inc_fbfile_in[include_stack_ptr];
501 strlcpy(conffilebuf, conffile_stack[include_stack_ptr], sizeof(conffilebuf));
502 yy_switch_to_buffer(include_stack[include_stack_ptr]);
503
504 return 0;
505 }

Properties

Name Value
svn:eol-style native
svn:keywords Id Revision