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1 | /* | |
2 | * ircd-ratbox: an advanced Internet Relay Chat Daemon(ircd). | |
3 | * m_etrace.c: Gives local opers a trace output with added info. | |
4 | * | |
5 | * Copyright (C) 2002-2003 Lee Hardy <lee@leeh.co.uk> | |
6 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions are | |
10 | * met: | |
11 | * | |
12 | * 1.Redistributions of source code must retain the above copyright notice, | |
13 | * this list of conditions and the following disclaimer. | |
14 | * 2.Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3.The name of the author may not be used to endorse or promote products | |
18 | * derived from this software without specific prior written permission. | |
19 | * | |
20 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
21 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
22 | * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
23 | * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, | |
24 | * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
25 | * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR | |
26 | * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) | |
27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, | |
28 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING | |
29 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE | |
30 | * POSSIBILITY OF SUCH DAMAGE. | |
31 | * | |
32 | */ | |
33 | ||
34 | #include "stdinc.h" | |
35 | #include "class.h" | |
36 | #include "hook.h" | |
37 | #include "client.h" | |
38 | #include "hash.h" | |
39 | #include "common.h" | |
40 | #include "hash.h" | |
41 | #include "match.h" | |
42 | #include "ircd.h" | |
43 | #include "numeric.h" | |
44 | #include "s_serv.h" | |
45 | #include "s_conf.h" | |
46 | #include "s_newconf.h" | |
47 | #include "send.h" | |
48 | #include "msg.h" | |
49 | #include "parse.h" | |
50 | #include "modules.h" | |
51 | ||
52 | static int mo_etrace(struct Client *, struct Client *, int, const char **); | |
53 | static int me_etrace(struct Client *, struct Client *, int, const char **); | |
54 | static int m_chantrace(struct Client *, struct Client *, int, const char **); | |
55 | static int mo_masktrace(struct Client *, struct Client *, int, const char **); | |
56 | ||
57 | struct Message etrace_msgtab = { | |
58 | "ETRACE", 0, 0, 0, MFLG_SLOW, | |
59 | {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, {me_etrace, 0}, {mo_etrace, 0}} | |
60 | }; | |
61 | struct Message chantrace_msgtab = { | |
62 | "CHANTRACE", 0, 0, 0, MFLG_SLOW, | |
63 | {mg_ignore, {m_chantrace, 2}, mg_ignore, mg_ignore, mg_ignore, {m_chantrace, 2}} | |
64 | }; | |
65 | struct Message masktrace_msgtab = { | |
66 | "MASKTRACE", 0, 0, 0, MFLG_SLOW, | |
67 | {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_masktrace, 2}} | |
68 | }; | |
69 | ||
70 | mapi_clist_av1 etrace_clist[] = { &etrace_msgtab, &chantrace_msgtab, &masktrace_msgtab, NULL }; | |
71 | DECLARE_MODULE_AV1(etrace, NULL, NULL, etrace_clist, NULL, NULL, "$Revision: 3161 $"); | |
72 | ||
73 | static void do_etrace(struct Client *source_p, int ipv4, int ipv6); | |
74 | static void do_etrace_full(struct Client *source_p); | |
75 | static void do_single_etrace(struct Client *source_p, struct Client *target_p); | |
76 | ||
77 | static const char *empty_sockhost = "255.255.255.255"; | |
78 | static const char *spoofed_sockhost = "0"; | |
79 | ||
80 | /* | |
81 | * m_etrace | |
82 | * parv[1] = options [or target] | |
83 | * parv[2] = [target] | |
84 | */ | |
85 | static int | |
86 | mo_etrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
87 | { | |
88 | if(parc > 1 && !EmptyString(parv[1])) | |
89 | { | |
90 | if(!irccmp(parv[1], "-full")) | |
91 | do_etrace_full(source_p); | |
92 | #ifdef RB_IPV6 | |
93 | else if(!irccmp(parv[1], "-v6")) | |
94 | do_etrace(source_p, 0, 1); | |
95 | else if(!irccmp(parv[1], "-v4")) | |
96 | do_etrace(source_p, 1, 0); | |
97 | #endif | |
98 | else | |
99 | { | |
100 | struct Client *target_p = find_named_person(parv[1]); | |
101 | ||
102 | if(target_p) | |
103 | { | |
104 | if(!MyClient(target_p)) | |
105 | sendto_one(target_p, ":%s ENCAP %s ETRACE %s", | |
106 | get_id(source_p, target_p), | |
107 | target_p->servptr->name, | |
108 | get_id(target_p, target_p)); | |
109 | else | |
110 | do_single_etrace(source_p, target_p); | |
111 | } | |
112 | else | |
113 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
114 | form_str(ERR_NOSUCHNICK), parv[1]); | |
115 | } | |
116 | } | |
117 | else | |
118 | do_etrace(source_p, 1, 1); | |
119 | ||
120 | return 0; | |
121 | } | |
122 | ||
123 | static int | |
124 | me_etrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
125 | { | |
126 | struct Client *target_p; | |
127 | ||
128 | if(!IsOper(source_p) || parc < 2 || EmptyString(parv[1])) | |
129 | return 0; | |
130 | ||
131 | /* we cant etrace remote clients.. we shouldnt even get sent them */ | |
132 | if((target_p = find_person(parv[1])) && MyClient(target_p)) | |
133 | do_single_etrace(source_p, target_p); | |
134 | ||
135 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), | |
136 | target_p ? target_p->name : parv[1]); | |
137 | ||
138 | return 0; | |
139 | } | |
140 | ||
141 | static void | |
142 | do_etrace(struct Client *source_p, int ipv4, int ipv6) | |
143 | { | |
144 | struct Client *target_p; | |
145 | rb_dlink_node *ptr; | |
146 | ||
147 | /* report all direct connections */ | |
148 | RB_DLINK_FOREACH(ptr, lclient_list.head) | |
149 | { | |
150 | target_p = ptr->data; | |
151 | ||
152 | #ifdef RB_IPV6 | |
153 | if((!ipv4 && target_p->localClient->ip.ss_family == AF_INET) || | |
154 | (!ipv6 && target_p->localClient->ip.ss_family == AF_INET6)) | |
155 | continue; | |
156 | #endif | |
157 | ||
158 | sendto_one(source_p, form_str(RPL_ETRACE), | |
159 | me.name, source_p->name, | |
160 | IsOper(target_p) ? "Oper" : "User", | |
161 | get_client_class(target_p), | |
162 | target_p->name, target_p->username, target_p->host, | |
163 | show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255", | |
164 | target_p->info); | |
165 | } | |
166 | ||
167 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
168 | } | |
169 | ||
170 | static void | |
171 | do_etrace_full(struct Client *source_p) | |
172 | { | |
173 | rb_dlink_node *ptr; | |
174 | ||
175 | RB_DLINK_FOREACH(ptr, lclient_list.head) | |
176 | { | |
177 | do_single_etrace(source_p, ptr->data); | |
178 | } | |
179 | ||
180 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
181 | } | |
182 | ||
183 | /* | |
184 | * do_single_etrace - searches local clients and displays those matching | |
185 | * a pattern | |
186 | * input - source client, target client | |
187 | * output - etrace results | |
188 | * side effects - etrace results are displayed | |
189 | */ | |
190 | static void | |
191 | do_single_etrace(struct Client *source_p, struct Client *target_p) | |
192 | { | |
193 | /* note, we hide fullcaps for spoofed users, as mirc can often | |
194 | * advertise its internal ip address in the field --fl | |
195 | */ | |
196 | if(!show_ip(source_p, target_p)) | |
197 | sendto_one(source_p, form_str(RPL_ETRACEFULL), | |
198 | me.name, source_p->name, | |
199 | IsOper(target_p) ? "Oper" : "User", | |
200 | get_client_class(target_p), | |
201 | target_p->name, target_p->username, target_p->host, | |
202 | "255.255.255.255", "<hidden> <hidden>", target_p->info); | |
203 | else | |
204 | sendto_one(source_p, form_str(RPL_ETRACEFULL), | |
205 | me.name, source_p->name, | |
206 | IsOper(target_p) ? "Oper" : "User", | |
207 | get_client_class(target_p), | |
208 | target_p->name, target_p->username, | |
209 | target_p->host, target_p->sockhost, | |
210 | target_p->localClient->fullcaps, target_p->info); | |
211 | } | |
212 | ||
213 | static int | |
214 | m_chantrace(struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
215 | { | |
216 | struct Client *target_p; | |
217 | struct Channel *chptr; | |
218 | struct membership *msptr; | |
219 | const char *sockhost; | |
220 | const char *name; | |
221 | rb_dlink_node *ptr; | |
222 | int operspy = 0; | |
223 | ||
224 | name = parv[1]; | |
225 | ||
226 | if(IsOperSpy(source_p) && parv[1][0] == '!') | |
227 | { | |
228 | name++; | |
229 | operspy = 1; | |
230 | ||
231 | if(EmptyString(name)) | |
232 | { | |
233 | sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), | |
234 | me.name, source_p->name, "CHANTRACE"); | |
235 | return 0; | |
236 | } | |
237 | } | |
238 | ||
239 | if((chptr = find_channel(name)) == NULL) | |
240 | { | |
241 | sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL), | |
242 | name); | |
243 | return 0; | |
244 | } | |
245 | ||
246 | /* dont report operspys for nonexistant channels. */ | |
247 | if(operspy) | |
248 | report_operspy(source_p, "CHANTRACE", chptr->chname); | |
249 | ||
250 | if(!operspy && !IsMember(client_p, chptr)) | |
251 | { | |
252 | sendto_one_numeric(source_p, ERR_NOTONCHANNEL, form_str(ERR_NOTONCHANNEL), | |
253 | chptr->chname); | |
254 | return 0; | |
255 | } | |
256 | ||
257 | RB_DLINK_FOREACH(ptr, chptr->members.head) | |
258 | { | |
259 | msptr = ptr->data; | |
260 | target_p = msptr->client_p; | |
261 | ||
262 | if(EmptyString(target_p->sockhost)) | |
263 | sockhost = empty_sockhost; | |
264 | else if(!show_ip(source_p, target_p)) | |
265 | sockhost = spoofed_sockhost; | |
266 | else | |
267 | sockhost = target_p->sockhost; | |
268 | ||
269 | sendto_one(source_p, form_str(RPL_ETRACE), | |
270 | me.name, source_p->name, | |
271 | IsOper(target_p) ? "Oper" : "User", | |
272 | /* class field -- pretend its server.. */ | |
273 | target_p->servptr->name, | |
274 | target_p->name, target_p->username, target_p->host, | |
275 | sockhost, target_p->info); | |
276 | } | |
277 | ||
278 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
279 | return 0; | |
280 | } | |
281 | ||
282 | static void | |
283 | match_masktrace(struct Client *source_p, rb_dlink_list *list, | |
284 | const char *username, const char *hostname, const char *name, | |
285 | const char *gecos) | |
286 | { | |
287 | struct Client *target_p; | |
288 | rb_dlink_node *ptr; | |
289 | const char *sockhost; | |
290 | ||
291 | RB_DLINK_FOREACH(ptr, list->head) | |
292 | { | |
293 | target_p = ptr->data; | |
294 | if(!IsPerson(target_p)) | |
295 | continue; | |
296 | ||
297 | if(EmptyString(target_p->sockhost)) | |
298 | sockhost = empty_sockhost; | |
299 | else if(!show_ip(source_p, target_p)) | |
300 | sockhost = spoofed_sockhost; | |
301 | else | |
302 | sockhost = target_p->sockhost; | |
303 | ||
304 | if(match(username, target_p->username) && | |
305 | (match(hostname, target_p->host) || | |
306 | match(hostname, target_p->orighost) || | |
307 | match(hostname, sockhost) || match_ips(hostname, sockhost))) | |
308 | { | |
309 | if(name != NULL && !match(name, target_p->name)) | |
310 | continue; | |
311 | ||
312 | if(gecos != NULL && !match_esc(gecos, target_p->info)) | |
313 | continue; | |
314 | ||
315 | sendto_one(source_p, form_str(RPL_ETRACE), | |
316 | me.name, source_p->name, | |
317 | IsOper(target_p) ? "Oper" : "User", | |
318 | /* class field -- pretend its server.. */ | |
319 | target_p->servptr->name, | |
320 | target_p->name, target_p->username, target_p->host, | |
321 | sockhost, target_p->info); | |
322 | } | |
323 | } | |
324 | } | |
325 | ||
326 | static int | |
327 | mo_masktrace(struct Client *client_p, struct Client *source_p, int parc, | |
328 | const char *parv[]) | |
329 | { | |
330 | char *name, *username, *hostname, *gecos; | |
331 | const char *mask; | |
332 | int operspy = 0; | |
333 | ||
334 | mask = parv[1]; | |
335 | name = LOCAL_COPY(parv[1]); | |
336 | collapse(name); | |
337 | ||
338 | if(IsOperSpy(source_p) && parv[1][0] == '!') | |
339 | { | |
340 | name++; | |
341 | mask++; | |
342 | operspy = 1; | |
343 | } | |
344 | ||
345 | if(parc > 2 && !EmptyString(parv[2])) | |
346 | { | |
347 | gecos = LOCAL_COPY(parv[2]); | |
348 | collapse_esc(gecos); | |
349 | } else | |
350 | gecos = NULL; | |
351 | ||
352 | ||
353 | if((hostname = strchr(name, '@')) == NULL) | |
354 | { | |
355 | sendto_one_notice(source_p, ":Invalid parameters"); | |
356 | return 0; | |
357 | } | |
358 | ||
359 | *hostname++ = '\0'; | |
360 | ||
361 | if((username = strchr(name, '!')) == NULL) | |
362 | { | |
363 | username = name; | |
364 | name = NULL; | |
365 | } else | |
366 | *username++ = '\0'; | |
367 | ||
368 | if(EmptyString(username) || EmptyString(hostname)) | |
369 | { | |
370 | sendto_one_notice(source_p, ":Invalid parameters"); | |
371 | return 0; | |
372 | } | |
373 | ||
374 | if(operspy) { | |
375 | if (!ConfigFileEntry.operspy_dont_care_user_info) | |
376 | { | |
377 | char buf[512]; | |
378 | rb_strlcpy(buf, mask, sizeof(buf)); | |
379 | if(!EmptyString(gecos)) { | |
380 | rb_strlcat(buf, " ", sizeof(buf)); | |
381 | rb_strlcat(buf, gecos, sizeof(buf)); | |
382 | } | |
383 | ||
384 | report_operspy(source_p, "MASKTRACE", buf); | |
385 | } | |
386 | match_masktrace(source_p, &global_client_list, username, hostname, name, gecos); | |
387 | } else | |
388 | match_masktrace(source_p, &lclient_list, username, hostname, name, gecos); | |
389 | ||
390 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
391 | return 0; | |
392 | } |