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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_trace.c: Traces a path to a client/server. | |
4 | * | |
5 | * Copyright (C) 1990 Jarkko Oikarinen and University of Oulu, Co Center | |
6 | * Copyright (C) 1996-2002 Hybrid Development Team | |
7 | * Copyright (C) 2002-2005 ircd-ratbox development team | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License as published by | |
11 | * the Free Software Foundation; either version 2 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | * GNU General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 | |
22 | * USA | |
23 | */ | |
24 | ||
25 | #include "stdinc.h" | |
26 | #include "class.h" | |
27 | #include "hook.h" | |
28 | #include "client.h" | |
29 | #include "hash.h" | |
30 | #include "hash.h" | |
31 | #include "match.h" | |
32 | #include "ircd.h" | |
33 | #include "numeric.h" | |
34 | #include "s_serv.h" | |
35 | #include "s_conf.h" | |
36 | #include "s_newconf.h" | |
37 | #include "send.h" | |
38 | #include "msg.h" | |
39 | #include "parse.h" | |
40 | #include "modules.h" | |
41 | ||
42 | static const char trace_desc[] = | |
43 | "Provides the TRACE command to trace the route to a client or server"; | |
44 | ||
45 | static void m_trace(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
46 | ||
47 | static void trace_spy(struct Client *, struct Client *); | |
48 | ||
49 | struct Message trace_msgtab = { | |
50 | "TRACE", 0, 0, 0, 0, | |
51 | {mg_unreg, {m_trace, 0}, {m_trace, 0}, mg_ignore, mg_ignore, {m_trace, 0}} | |
52 | }; | |
53 | ||
54 | int doing_trace_hook; | |
55 | ||
56 | mapi_clist_av1 trace_clist[] = { &trace_msgtab, NULL }; | |
57 | mapi_hlist_av1 trace_hlist[] = { | |
58 | { "doing_trace", &doing_trace_hook }, | |
59 | { NULL, NULL } | |
60 | }; | |
61 | DECLARE_MODULE_AV2(trace, NULL, NULL, trace_clist, trace_hlist, NULL, NULL, NULL, trace_desc); | |
62 | ||
63 | static void count_downlinks(struct Client *server_p, int *pservcount, int *pusercount); | |
64 | static int report_this_status(struct Client *source_p, struct Client *target_p); | |
65 | ||
66 | static const char *empty_sockhost = "255.255.255.255"; | |
67 | ||
68 | /* | |
69 | * m_trace | |
70 | * parv[1] = servername | |
71 | */ | |
72 | static void | |
73 | m_trace(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
74 | { | |
75 | struct Client *target_p = NULL; | |
76 | struct Class *cltmp; | |
77 | const char *tname; | |
78 | bool doall = false, wilds, dow; | |
79 | int cnt = 0; | |
80 | rb_dlink_node *ptr; | |
81 | ||
82 | if(parc > 1) | |
83 | { | |
84 | tname = parv[1]; | |
85 | ||
86 | if(parc > 2) | |
87 | { | |
88 | if(hunt_server(client_p, source_p, ":%s TRACE %s :%s", 2, parc, parv) != | |
89 | HUNTED_ISME) | |
90 | return; | |
91 | } | |
92 | } | |
93 | else | |
94 | tname = me.name; | |
95 | ||
96 | /* if we have 3 parameters, then the command is directed at us. So | |
97 | * we shouldnt be forwarding it anywhere. | |
98 | */ | |
99 | if(parc < 3) | |
100 | { | |
101 | switch (hunt_server(client_p, source_p, ":%s TRACE :%s", 1, parc, parv)) | |
102 | { | |
103 | case HUNTED_PASS: /* note: gets here only if parv[1] exists */ | |
104 | { | |
105 | struct Client *ac2ptr; | |
106 | ||
107 | if(MyClient(source_p)) | |
108 | ac2ptr = find_named_client(tname); | |
109 | else | |
110 | ac2ptr = find_client(tname); | |
111 | ||
112 | if(ac2ptr == NULL) | |
113 | { | |
114 | RB_DLINK_FOREACH(ptr, global_serv_list.head) | |
115 | { | |
116 | ac2ptr = ptr->data; | |
117 | ||
118 | if(match(tname, ac2ptr->name)) | |
119 | break; | |
120 | else | |
121 | ac2ptr = NULL; | |
122 | } | |
123 | } | |
124 | ||
125 | /* giving this out with flattened links defeats the | |
126 | * object --fl | |
127 | */ | |
128 | if(IsOper(source_p) || IsExemptShide(source_p) || | |
129 | !ConfigServerHide.flatten_links) | |
130 | sendto_one_numeric(source_p, RPL_TRACELINK, | |
131 | form_str(RPL_TRACELINK), | |
132 | ircd_version, | |
133 | ac2ptr ? ac2ptr->name : tname, | |
134 | ac2ptr ? ac2ptr->from->name : "EEK!"); | |
135 | ||
136 | return; | |
137 | } | |
138 | ||
139 | case HUNTED_ISME: | |
140 | break; | |
141 | ||
142 | default: | |
143 | return; | |
144 | } | |
145 | } | |
146 | ||
147 | if(match(tname, me.name)) | |
148 | { | |
149 | doall = true; | |
150 | } | |
151 | /* if theyre tracing our SID, we need to move tname to our name so | |
152 | * we dont give the sid in ENDOFTRACE | |
153 | */ | |
154 | else if(!MyClient(source_p) && !strcmp(tname, me.id)) | |
155 | { | |
156 | doall = true; | |
157 | tname = me.name; | |
158 | } | |
159 | ||
160 | wilds = strchr(tname, '*') || strchr(tname, '?'); | |
161 | dow = wilds || doall; | |
162 | ||
163 | /* specific trace */ | |
164 | if(!dow) | |
165 | { | |
166 | if(MyClient(source_p) || parc > 2) | |
167 | target_p = find_named_person(tname); | |
168 | else | |
169 | target_p = find_person(tname); | |
170 | ||
171 | /* tname could be pointing to an ID at this point, so reset | |
172 | * it to target_p->name if we have a target --fl | |
173 | */ | |
174 | if(target_p != NULL) | |
175 | { | |
176 | report_this_status(source_p, target_p); | |
177 | tname = target_p->name; | |
178 | } | |
179 | ||
180 | trace_spy(source_p, target_p); | |
181 | ||
182 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, | |
183 | form_str(RPL_ENDOFTRACE), tname); | |
184 | return; | |
185 | } | |
186 | ||
187 | trace_spy(source_p, NULL); | |
188 | ||
189 | /* give non-opers a limited trace output of themselves (if local), | |
190 | * opers and servers (if no shide) --fl | |
191 | */ | |
192 | if(!IsOper(source_p)) | |
193 | { | |
194 | if(MyClient(source_p)) | |
195 | { | |
196 | if(doall || (wilds && match(tname, source_p->name))) | |
197 | report_this_status(source_p, source_p); | |
198 | } | |
199 | ||
200 | RB_DLINK_FOREACH(ptr, local_oper_list.head) | |
201 | { | |
202 | target_p = ptr->data; | |
203 | ||
204 | if(!doall && wilds && (match(tname, target_p->name) == 0)) | |
205 | continue; | |
206 | ||
207 | if(!SeesOper(target_p, source_p)) | |
208 | continue; | |
209 | ||
210 | report_this_status(source_p, target_p); | |
211 | } | |
212 | ||
213 | if (IsExemptShide(source_p) || !ConfigServerHide.flatten_links) | |
214 | { | |
215 | RB_DLINK_FOREACH(ptr, serv_list.head) | |
216 | { | |
217 | target_p = ptr->data; | |
218 | ||
219 | if(!doall && wilds && !match(tname, target_p->name)) | |
220 | continue; | |
221 | ||
222 | report_this_status(source_p, target_p); | |
223 | } | |
224 | } | |
225 | ||
226 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, | |
227 | form_str(RPL_ENDOFTRACE), tname); | |
228 | return; | |
229 | } | |
230 | ||
231 | /* source_p is opered */ | |
232 | ||
233 | /* report all direct connections */ | |
234 | RB_DLINK_FOREACH(ptr, lclient_list.head) | |
235 | { | |
236 | target_p = ptr->data; | |
237 | ||
238 | /* dont show invisible users to remote opers */ | |
239 | if(IsInvisible(target_p) && dow && !MyConnect(source_p) && !SeesOper(target_p, source_p)) | |
240 | continue; | |
241 | ||
242 | if(!doall && wilds && !match(tname, target_p->name)) | |
243 | continue; | |
244 | ||
245 | /* remote opers may not see invisible normal users */ | |
246 | if(dow && !MyConnect(source_p) && !SeesOper(target_p, source_p) && | |
247 | IsInvisible(target_p)) | |
248 | continue; | |
249 | ||
250 | cnt = report_this_status(source_p, target_p); | |
251 | } | |
252 | ||
253 | RB_DLINK_FOREACH(ptr, serv_list.head) | |
254 | { | |
255 | target_p = ptr->data; | |
256 | ||
257 | if(!doall && wilds && !match(tname, target_p->name)) | |
258 | continue; | |
259 | ||
260 | cnt = report_this_status(source_p, target_p); | |
261 | } | |
262 | ||
263 | if(MyConnect(source_p)) | |
264 | { | |
265 | RB_DLINK_FOREACH(ptr, unknown_list.head) | |
266 | { | |
267 | target_p = ptr->data; | |
268 | ||
269 | if(!doall && wilds && !match(tname, target_p->name)) | |
270 | continue; | |
271 | ||
272 | cnt = report_this_status(source_p, target_p); | |
273 | } | |
274 | } | |
275 | ||
276 | if(!cnt) | |
277 | { | |
278 | sendto_one_numeric(source_p, ERR_NOSUCHSERVER, form_str(ERR_NOSUCHSERVER), | |
279 | tname); | |
280 | ||
281 | /* let the user have some idea that its at the end of the | |
282 | * trace | |
283 | */ | |
284 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, | |
285 | form_str(RPL_ENDOFTRACE), tname); | |
286 | return; | |
287 | } | |
288 | ||
289 | if(doall) | |
290 | { | |
291 | RB_DLINK_FOREACH(ptr, class_list.head) | |
292 | { | |
293 | cltmp = ptr->data; | |
294 | ||
295 | if(CurrUsers(cltmp) > 0) | |
296 | sendto_one_numeric(source_p, RPL_TRACECLASS, | |
297 | form_str(RPL_TRACECLASS), | |
298 | ClassName(cltmp), CurrUsers(cltmp)); | |
299 | } | |
300 | } | |
301 | ||
302 | sendto_one_numeric(source_p, RPL_ENDOFTRACE, form_str(RPL_ENDOFTRACE), tname); | |
303 | } | |
304 | ||
305 | /* | |
306 | * count_downlinks | |
307 | * | |
308 | * inputs - pointer to server to count | |
309 | * - pointers to server and user count | |
310 | * output - NONE | |
311 | * side effects - server and user counts are added to given values | |
312 | */ | |
313 | static void | |
314 | count_downlinks(struct Client *server_p, int *pservcount, int *pusercount) | |
315 | { | |
316 | rb_dlink_node *ptr; | |
317 | ||
318 | (*pservcount)++; | |
319 | *pusercount += rb_dlink_list_length(&server_p->serv->users); | |
320 | RB_DLINK_FOREACH(ptr, server_p->serv->servers.head) | |
321 | { | |
322 | count_downlinks(ptr->data, pservcount, pusercount); | |
323 | } | |
324 | } | |
325 | ||
326 | /* | |
327 | * report_this_status | |
328 | * | |
329 | * inputs - pointer to client to report to | |
330 | * - pointer to client to report about | |
331 | * output - counter of number of hits | |
332 | * side effects - NONE | |
333 | */ | |
334 | static int | |
335 | report_this_status(struct Client *source_p, struct Client *target_p) | |
336 | { | |
337 | const char *name; | |
338 | const char *class_name; | |
339 | char ip[HOSTIPLEN]; | |
340 | int cnt = 0; | |
341 | ||
342 | /* sanity check - should never happen */ | |
343 | if(!MyConnect(target_p)) | |
344 | return 0; | |
345 | ||
346 | rb_inet_ntop_sock((struct sockaddr *)&target_p->localClient->ip, ip, sizeof(ip)); | |
347 | class_name = get_client_class(target_p); | |
348 | ||
349 | if(IsAnyServer(target_p)) | |
350 | name = target_p->name; | |
351 | else | |
352 | name = get_client_name(target_p, HIDE_IP); | |
353 | ||
354 | switch (target_p->status) | |
355 | { | |
356 | case STAT_CONNECTING: | |
357 | sendto_one_numeric(source_p, RPL_TRACECONNECTING, | |
358 | form_str(RPL_TRACECONNECTING), | |
359 | class_name, name); | |
360 | cnt++; | |
361 | break; | |
362 | ||
363 | case STAT_HANDSHAKE: | |
364 | sendto_one_numeric(source_p, RPL_TRACEHANDSHAKE, | |
365 | form_str(RPL_TRACEHANDSHAKE), | |
366 | class_name, name); | |
367 | cnt++; | |
368 | break; | |
369 | ||
370 | case STAT_ME: | |
371 | break; | |
372 | ||
373 | case STAT_UNKNOWN: | |
374 | /* added time -Taner */ | |
375 | sendto_one_numeric(source_p, RPL_TRACEUNKNOWN, | |
376 | form_str(RPL_TRACEUNKNOWN), | |
377 | class_name, name, ip, | |
378 | (unsigned long)(rb_current_time() - target_p->localClient->firsttime)); | |
379 | cnt++; | |
380 | break; | |
381 | ||
382 | case STAT_CLIENT: | |
383 | { | |
384 | sendto_one_numeric(source_p, | |
385 | SeesOper(target_p, source_p) ? RPL_TRACEOPERATOR : RPL_TRACEUSER, | |
386 | SeesOper(target_p, source_p) ? form_str(RPL_TRACEOPERATOR) : form_str(RPL_TRACEUSER), | |
387 | class_name, name, | |
388 | show_ip(source_p, target_p) ? ip : empty_sockhost, | |
389 | (unsigned long)(rb_current_time() - target_p->localClient->lasttime), | |
390 | (unsigned long)(rb_current_time() - target_p->localClient->last)); | |
391 | ||
392 | cnt++; | |
393 | } | |
394 | break; | |
395 | ||
396 | case STAT_SERVER: | |
397 | { | |
398 | int usercount = 0; | |
399 | int servcount = 0; | |
400 | ||
401 | count_downlinks(target_p, &servcount, &usercount); | |
402 | ||
403 | sendto_one_numeric(source_p, RPL_TRACESERVER, form_str(RPL_TRACESERVER), | |
404 | class_name, servcount, usercount, name, | |
405 | *(target_p->serv->by) ? target_p->serv->by : "*", "*", | |
406 | me.name, | |
407 | (unsigned long)(rb_current_time() - target_p->localClient->lasttime)); | |
408 | cnt++; | |
409 | ||
410 | } | |
411 | break; | |
412 | ||
413 | default: /* ...we actually shouldn't come here... --msa */ | |
414 | sendto_one_numeric(source_p, RPL_TRACENEWTYPE, | |
415 | form_str(RPL_TRACENEWTYPE), name); | |
416 | cnt++; | |
417 | break; | |
418 | } | |
419 | ||
420 | return (cnt); | |
421 | } | |
422 | ||
423 | /* trace_spy() | |
424 | * | |
425 | * input - pointer to client | |
426 | * output - none | |
427 | * side effects - hook event doing_trace is called | |
428 | */ | |
429 | static void | |
430 | trace_spy(struct Client *source_p, struct Client *target_p) | |
431 | { | |
432 | hook_data_client hdata; | |
433 | ||
434 | hdata.client = source_p; | |
435 | hdata.target = target_p; | |
436 | ||
437 | call_hook(doing_trace_hook, &hdata); | |
438 | } |