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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 | #include "stdinc.h" | |
34 | #include "class.h" | |
35 | #include "hook.h" | |
36 | #include "client.h" | |
37 | #include "hash.h" | |
38 | #include "hash.h" | |
39 | #include "match.h" | |
40 | #include "ircd.h" | |
41 | #include "numeric.h" | |
42 | #include "s_serv.h" | |
43 | #include "s_conf.h" | |
44 | #include "s_newconf.h" | |
45 | #include "send.h" | |
46 | #include "msg.h" | |
47 | #include "parse.h" | |
48 | #include "modules.h" | |
49 | #include "logger.h" | |
50 | #include "supported.h" | |
51 | ||
52 | static const char etrace_desc[] = | |
53 | "Provides enhanced tracing facilities to opers (ETRACE, CHANTRACE, and MASKTRACE)"; | |
54 | ||
55 | static void mo_etrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
56 | static void me_etrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
57 | static void m_chantrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
58 | static void mo_masktrace(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
59 | ||
60 | struct Message etrace_msgtab = { | |
61 | "ETRACE", 0, 0, 0, 0, | |
62 | {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, {me_etrace, 0}, {mo_etrace, 0}} | |
63 | }; | |
64 | struct Message chantrace_msgtab = { | |
65 | "CHANTRACE", 0, 0, 0, 0, | |
66 | {mg_ignore, {m_chantrace, 2}, mg_ignore, mg_ignore, mg_ignore, {m_chantrace, 2}} | |
67 | }; | |
68 | struct Message masktrace_msgtab = { | |
69 | "MASKTRACE", 0, 0, 0, 0, | |
70 | {mg_ignore, mg_not_oper, mg_ignore, mg_ignore, mg_ignore, {mo_masktrace, 2}} | |
71 | }; | |
72 | ||
73 | static int | |
74 | _modinit(void) | |
75 | { | |
76 | add_isupport("ETRACE", isupport_string, ""); | |
77 | ||
78 | return 0; | |
79 | } | |
80 | ||
81 | static void | |
82 | _moddeinit(void) | |
83 | { | |
84 | delete_isupport("ETRACE"); | |
85 | } | |
86 | ||
87 | mapi_clist_av1 etrace_clist[] = { &etrace_msgtab, &chantrace_msgtab, &masktrace_msgtab, NULL }; | |
88 | ||
89 | DECLARE_MODULE_AV2(etrace, _modinit, _moddeinit, etrace_clist, NULL, NULL, NULL, NULL, etrace_desc); | |
90 | ||
91 | static void do_etrace(struct Client *source_p, int ipv4, int ipv6); | |
92 | static void do_etrace_full(struct Client *source_p); | |
93 | static void do_single_etrace(struct Client *source_p, struct Client *target_p); | |
94 | ||
95 | static const char *empty_sockhost = "255.255.255.255"; | |
96 | static const char *spoofed_sockhost = "0"; | |
97 | ||
98 | /* | |
99 | * m_etrace | |
100 | * parv[1] = options [or target] | |
101 | * parv[2] = [target] | |
102 | */ | |
103 | static void | |
104 | mo_etrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
105 | { | |
106 | if(parc > 1 && !EmptyString(parv[1])) | |
107 | { | |
108 | if(!irccmp(parv[1], "-full")) | |
109 | do_etrace_full(source_p); | |
110 | else if(!irccmp(parv[1], "-v6")) | |
111 | do_etrace(source_p, 0, 1); | |
112 | else if(!irccmp(parv[1], "-v4")) | |
113 | do_etrace(source_p, 1, 0); | |
114 | else | |
115 | { | |
116 | struct Client *target_p = find_named_person(parv[1]); | |
117 | ||
118 | if(target_p) | |
119 | { | |
120 | if(!MyClient(target_p)) | |
121 | sendto_one(target_p, ":%s ENCAP %s ETRACE %s", | |
122 | get_id(source_p, target_p), | |
123 | target_p->servptr->name, | |
124 | get_id(target_p, target_p)); | |
125 | else | |
126 | do_single_etrace(source_p, target_p); | |
127 | } | |
128 | else | |
129 | sendto_one_numeric(source_p, ERR_NOSUCHNICK, | |
130 | form_str(ERR_NOSUCHNICK), parv[1]); | |
131 | } | |
132 | } | |
133 | else | |
134 | do_etrace(source_p, 1, 1); | |
135 | } | |
136 | ||
137 | static void | |
138 | me_etrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
139 | { | |
140 | struct Client *target_p; | |
141 | ||
142 | if(!IsOper(source_p) || parc < 2 || EmptyString(parv[1])) | |
143 | return; | |
144 | ||
145 | /* we cant etrace remote clients.. we shouldnt even get sent them */ | |
146 | if((target_p = find_person(parv[1])) && MyClient(target_p)) | |
147 | do_single_etrace(source_p, target_p); | |
148 | ||
149 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), | |
150 | target_p ? target_p->name : parv[1]); | |
151 | } | |
152 | ||
153 | static void | |
154 | do_etrace(struct Client *source_p, int ipv4, int ipv6) | |
155 | { | |
156 | struct Client *target_p; | |
157 | rb_dlink_node *ptr; | |
158 | ||
159 | /* report all direct connections */ | |
160 | RB_DLINK_FOREACH(ptr, lclient_list.head) | |
161 | { | |
162 | target_p = ptr->data; | |
163 | ||
164 | if((!ipv4 && GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET) || | |
165 | (!ipv6 && GET_SS_FAMILY(&target_p->localClient->ip) == AF_INET6)) | |
166 | continue; | |
167 | ||
168 | sendto_one(source_p, form_str(RPL_ETRACE), | |
169 | me.name, source_p->name, | |
170 | SeesOper(target_p, source_p) ? "Oper" : "User", | |
171 | get_client_class(target_p), | |
172 | target_p->name, target_p->username, target_p->host, | |
173 | show_ip(source_p, target_p) ? target_p->sockhost : "255.255.255.255", | |
174 | target_p->info); | |
175 | } | |
176 | ||
177 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
178 | } | |
179 | ||
180 | static void | |
181 | do_etrace_full(struct Client *source_p) | |
182 | { | |
183 | rb_dlink_node *ptr; | |
184 | ||
185 | RB_DLINK_FOREACH(ptr, lclient_list.head) | |
186 | { | |
187 | do_single_etrace(source_p, ptr->data); | |
188 | } | |
189 | ||
190 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
191 | } | |
192 | ||
193 | /* | |
194 | * do_single_etrace - searches local clients and displays those matching | |
195 | * a pattern | |
196 | * input - source client, target client | |
197 | * output - etrace results | |
198 | * side effects - etrace results are displayed | |
199 | */ | |
200 | static void | |
201 | do_single_etrace(struct Client *source_p, struct Client *target_p) | |
202 | { | |
203 | /* note, we hide fullcaps for spoofed users, as mirc can often | |
204 | * advertise its internal ip address in the field --fl | |
205 | */ | |
206 | if(!show_ip(source_p, target_p)) | |
207 | sendto_one(source_p, form_str(RPL_ETRACEFULL), | |
208 | me.name, source_p->name, | |
209 | SeesOper(target_p, source_p) ? "Oper" : "User", | |
210 | get_client_class(target_p), | |
211 | target_p->name, target_p->username, target_p->host, | |
212 | "255.255.255.255", "<hidden> <hidden>", target_p->info); | |
213 | else | |
214 | sendto_one(source_p, form_str(RPL_ETRACEFULL), | |
215 | me.name, source_p->name, | |
216 | SeesOper(target_p, source_p) ? "Oper" : "User", | |
217 | get_client_class(target_p), | |
218 | target_p->name, target_p->username, | |
219 | target_p->host, target_p->sockhost, | |
220 | target_p->localClient->fullcaps, target_p->info); | |
221 | } | |
222 | ||
223 | static void | |
224 | m_chantrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
225 | { | |
226 | struct Client *target_p; | |
227 | struct Channel *chptr; | |
228 | struct membership *msptr; | |
229 | const char *sockhost; | |
230 | const char *name; | |
231 | rb_dlink_node *ptr; | |
232 | int operspy = 0; | |
233 | ||
234 | name = parv[1]; | |
235 | ||
236 | if(IsOperSpy(source_p) && parv[1][0] == '!') | |
237 | { | |
238 | name++; | |
239 | operspy = 1; | |
240 | ||
241 | if(EmptyString(name)) | |
242 | { | |
243 | sendto_one(source_p, form_str(ERR_NEEDMOREPARAMS), | |
244 | me.name, source_p->name, "CHANTRACE"); | |
245 | return; | |
246 | } | |
247 | } | |
248 | ||
249 | if((chptr = find_channel(name)) == NULL) | |
250 | { | |
251 | sendto_one_numeric(source_p, ERR_NOSUCHCHANNEL, form_str(ERR_NOSUCHCHANNEL), | |
252 | name); | |
253 | return; | |
254 | } | |
255 | ||
256 | /* dont report operspys for nonexistant channels. */ | |
257 | if(operspy) | |
258 | report_operspy(source_p, "CHANTRACE", chptr->chname); | |
259 | ||
260 | if(!operspy && !IsMember(client_p, chptr)) | |
261 | { | |
262 | sendto_one_numeric(source_p, ERR_NOTONCHANNEL, form_str(ERR_NOTONCHANNEL), | |
263 | chptr->chname); | |
264 | return; | |
265 | } | |
266 | ||
267 | RB_DLINK_FOREACH(ptr, chptr->members.head) | |
268 | { | |
269 | msptr = ptr->data; | |
270 | target_p = msptr->client_p; | |
271 | ||
272 | if(EmptyString(target_p->sockhost)) | |
273 | sockhost = empty_sockhost; | |
274 | else if(!show_ip(source_p, target_p)) | |
275 | sockhost = spoofed_sockhost; | |
276 | else | |
277 | sockhost = target_p->sockhost; | |
278 | ||
279 | sendto_one(source_p, form_str(RPL_ETRACE), | |
280 | me.name, source_p->name, | |
281 | SeesOper(target_p, source_p) ? "Oper" : "User", | |
282 | /* class field -- pretend its server.. */ | |
283 | target_p->servptr->name, | |
284 | target_p->name, target_p->username, target_p->host, | |
285 | sockhost, target_p->info); | |
286 | } | |
287 | ||
288 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
289 | } | |
290 | ||
291 | static void | |
292 | match_masktrace(struct Client *source_p, rb_dlink_list *list, | |
293 | const char *username, const char *hostname, const char *name, | |
294 | const char *gecos) | |
295 | { | |
296 | struct Client *target_p; | |
297 | rb_dlink_node *ptr; | |
298 | const char *sockhost; | |
299 | ||
300 | RB_DLINK_FOREACH(ptr, list->head) | |
301 | { | |
302 | target_p = ptr->data; | |
303 | if(!IsPerson(target_p)) | |
304 | continue; | |
305 | ||
306 | if(EmptyString(target_p->sockhost)) | |
307 | sockhost = empty_sockhost; | |
308 | else if(!show_ip(source_p, target_p)) | |
309 | sockhost = spoofed_sockhost; | |
310 | else | |
311 | sockhost = target_p->sockhost; | |
312 | ||
313 | if(match(username, target_p->username) && | |
314 | (match(hostname, target_p->host) || | |
315 | match(hostname, target_p->orighost) || | |
316 | match(hostname, sockhost) || match_ips(hostname, sockhost))) | |
317 | { | |
318 | if(name != NULL && !match(name, target_p->name)) | |
319 | continue; | |
320 | ||
321 | if(gecos != NULL && !match_esc(gecos, target_p->info)) | |
322 | continue; | |
323 | ||
324 | sendto_one(source_p, form_str(RPL_ETRACE), | |
325 | me.name, source_p->name, | |
326 | SeesOper(target_p, source_p) ? "Oper" : "User", | |
327 | /* class field -- pretend its server.. */ | |
328 | target_p->servptr->name, | |
329 | target_p->name, target_p->username, target_p->host, | |
330 | sockhost, target_p->info); | |
331 | } | |
332 | } | |
333 | } | |
334 | ||
335 | static void | |
336 | mo_masktrace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, | |
337 | const char *parv[]) | |
338 | { | |
339 | char *name, *username, *hostname, *gecos; | |
340 | const char *mask; | |
341 | int operspy = 0; | |
342 | ||
343 | mask = parv[1]; | |
344 | name = LOCAL_COPY(parv[1]); | |
345 | collapse(name); | |
346 | ||
347 | if(IsOperSpy(source_p) && parv[1][0] == '!') | |
348 | { | |
349 | name++; | |
350 | mask++; | |
351 | operspy = 1; | |
352 | } | |
353 | ||
354 | if(parc > 2 && !EmptyString(parv[2])) | |
355 | { | |
356 | gecos = LOCAL_COPY(parv[2]); | |
357 | collapse_esc(gecos); | |
358 | } else | |
359 | gecos = NULL; | |
360 | ||
361 | ||
362 | if((hostname = strchr(name, '@')) == NULL) | |
363 | { | |
364 | sendto_one_notice(source_p, ":Invalid parameters"); | |
365 | return; | |
366 | } | |
367 | ||
368 | *hostname++ = '\0'; | |
369 | ||
370 | if((username = strchr(name, '!')) == NULL) | |
371 | { | |
372 | username = name; | |
373 | name = NULL; | |
374 | } else | |
375 | *username++ = '\0'; | |
376 | ||
377 | if(EmptyString(username) || EmptyString(hostname)) | |
378 | { | |
379 | sendto_one_notice(source_p, ":Invalid parameters"); | |
380 | return; | |
381 | } | |
382 | ||
383 | if(operspy) { | |
384 | if (!ConfigFileEntry.operspy_dont_care_user_info) | |
385 | { | |
386 | char buf[512]; | |
387 | rb_strlcpy(buf, mask, sizeof(buf)); | |
388 | if(!EmptyString(gecos)) { | |
389 | rb_strlcat(buf, " ", sizeof(buf)); | |
390 | rb_strlcat(buf, gecos, sizeof(buf)); | |
391 | } | |
392 | ||
393 | report_operspy(source_p, "MASKTRACE", buf); | |
394 | } | |
395 | match_masktrace(source_p, &global_client_list, username, hostname, name, gecos); | |
396 | } else | |
397 | match_masktrace(source_p, &lclient_list, username, hostname, name, gecos); | |
398 | ||
399 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), me.name); | |
400 | } |