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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_trace.c | |
3 | * Copyright (C) 1990 Jarkko Oikarinen and | |
4 | * University of Oulu, Computing Center | |
5 | * | |
6 | * See file AUTHORS in IRC package for additional names of | |
7 | * the programmers. | |
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 1, or (at your option) | |
12 | * 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., 675 Mass Ave, Cambridge, MA 02139, USA. | |
22 | * | |
23 | * $Id: m_trace.c,v 1.13 2005/08/26 03:23:23 entrope Exp $ | |
24 | */ | |
25 | ||
26 | /* | |
27 | * m_functions execute protocol messages on this server: | |
28 | * | |
29 | * cptr is always NON-NULL, pointing to a *LOCAL* client | |
30 | * structure (with an open socket connected!). This | |
31 | * identifies the physical socket where the message | |
32 | * originated (or which caused the m_function to be | |
33 | * executed--some m_functions may call others...). | |
34 | * | |
35 | * sptr is the source of the message, defined by the | |
36 | * prefix part of the message if present. If not | |
37 | * or prefix not found, then sptr==cptr. | |
38 | * | |
39 | * (!IsServer(cptr)) => (cptr == sptr), because | |
40 | * prefixes are taken *only* from servers... | |
41 | * | |
42 | * (IsServer(cptr)) | |
43 | * (sptr == cptr) => the message didn't | |
44 | * have the prefix. | |
45 | * | |
46 | * (sptr != cptr && IsServer(sptr) means | |
47 | * the prefix specified servername. (?) | |
48 | * | |
49 | * (sptr != cptr && !IsServer(sptr) means | |
50 | * that message originated from a remote | |
51 | * user (not local). | |
52 | * | |
53 | * combining | |
54 | * | |
55 | * (!IsServer(sptr)) means that, sptr can safely | |
56 | * taken as defining the target structure of the | |
57 | * message in this server. | |
58 | * | |
59 | * *Always* true (if 'parse' and others are working correct): | |
60 | * | |
61 | * 1) sptr->from == cptr (note: cptr->from == cptr) | |
62 | * | |
63 | * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr | |
64 | * *cannot* be a local connection, unless it's | |
65 | * actually cptr!). [MyConnect(x) should probably | |
66 | * be defined as (x == x->from) --msa ] | |
67 | * | |
68 | * parc number of variable parameter strings (if zero, | |
69 | * parv is allowed to be NULL) | |
70 | * | |
71 | * parv a NULL terminated list of parameter pointers, | |
72 | * | |
73 | * parv[0], sender (prefix string), if not present | |
74 | * this points to an empty string. | |
75 | * parv[1]...parv[parc-1] | |
76 | * pointers to additional parameters | |
77 | * parv[parc] == NULL, *always* | |
78 | * | |
79 | * note: it is guaranteed that parv[0]..parv[parc-1] are all | |
80 | * non-NULL pointers. | |
81 | */ | |
82 | #include "config.h" | |
83 | ||
84 | #include "class.h" | |
85 | #include "client.h" | |
86 | #include "hash.h" | |
87 | #include "ircd.h" | |
88 | #include "ircd_features.h" | |
89 | #include "ircd_log.h" | |
90 | #include "ircd_reply.h" | |
91 | #include "ircd_string.h" | |
92 | #include "match.h" | |
93 | #include "msg.h" | |
94 | #include "numeric.h" | |
95 | #include "numnicks.h" | |
96 | #include "s_bsd.h" | |
97 | #include "s_conf.h" | |
98 | #include "s_user.h" | |
99 | #include "send.h" | |
100 | #include "version.h" | |
101 | ||
102 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
103 | #include <string.h> | |
104 | ||
105 | void do_trace(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) | |
106 | { | |
107 | int i; | |
108 | struct Client *acptr; | |
109 | struct Client *acptr2; | |
110 | const struct ConnectionClass* cl; | |
111 | char* tname; | |
112 | int doall; | |
113 | int link_s[MAXCONNECTIONS]; | |
114 | int link_u[MAXCONNECTIONS]; | |
115 | int cnt = 0; | |
116 | int wilds; | |
117 | int dow; | |
118 | ||
119 | if (parc < 2 || BadPtr(parv[1])) | |
120 | { | |
121 | /* just "TRACE" without parameters. Must be from local client */ | |
122 | parc = 1; | |
123 | acptr = &me; | |
124 | tname = cli_name(&me); | |
125 | i = HUNTED_ISME; | |
126 | } | |
127 | else if (parc < 3 || BadPtr(parv[2])) | |
128 | { | |
129 | /* No target specified. Make one before propagating. */ | |
130 | parc = 2; | |
131 | tname = parv[1]; | |
132 | if ((acptr = find_match_server(parv[1])) || | |
133 | ((acptr = FindClient(parv[1])) && !MyUser(acptr))) | |
134 | { | |
135 | if (IsUser(acptr)) | |
136 | parv[2] = cli_name(cli_user(acptr)->server); | |
137 | else | |
138 | parv[2] = cli_name(acptr); | |
139 | parc = 3; | |
140 | parv[3] = 0; | |
141 | if ((i = hunt_server_cmd(sptr, CMD_TRACE, cptr, IsServer(acptr), | |
142 | "%s :%C", 2, parc, parv)) == HUNTED_NOSUCH) | |
143 | return; | |
144 | } | |
145 | else | |
146 | i = HUNTED_ISME; | |
147 | } else { | |
148 | /* Got "TRACE <tname> :<target>" */ | |
149 | parc = 3; | |
150 | if (MyUser(sptr) || Protocol(cptr) < 10) | |
151 | acptr = find_match_server(parv[2]); | |
152 | else | |
153 | acptr = FindNServer(parv[2]); | |
154 | if ((i = hunt_server_cmd(sptr, CMD_TRACE, cptr, 0, "%s :%C", 2, parc, | |
155 | parv)) == HUNTED_NOSUCH) | |
156 | return; | |
157 | tname = parv[1]; | |
158 | } | |
159 | ||
160 | if (i == HUNTED_PASS) { | |
161 | if (!acptr) | |
162 | acptr = next_client(GlobalClientList, tname); | |
163 | else | |
164 | acptr = cli_from(acptr); | |
165 | send_reply(sptr, RPL_TRACELINK, | |
166 | version, debugmode, tname, | |
167 | acptr ? cli_name(cli_from(acptr)) : "<No_match>"); | |
168 | return; | |
169 | } | |
170 | ||
171 | doall = (parv[1] && (parc > 1)) ? !match(tname, cli_name(&me)) : 1; | |
172 | wilds = !parv[1] || strchr(tname, '*') || strchr(tname, '?'); | |
173 | dow = wilds || doall; | |
174 | ||
175 | /* Don't give (long) remote listings to lusers */ | |
176 | if (dow && !MyConnect(sptr) && !IsAnOper(sptr)) { | |
177 | send_reply(sptr, RPL_TRACEEND); | |
178 | return; | |
179 | } | |
180 | ||
181 | for (i = 0; i < MAXCONNECTIONS; i++) | |
182 | link_s[i] = 0, link_u[i] = 0; | |
183 | ||
184 | if (doall) { | |
185 | for (acptr = GlobalClientList; acptr; acptr = cli_next(acptr)) { | |
186 | if (IsUser(acptr)) | |
187 | link_u[cli_fd(cli_from(acptr))]++; | |
188 | else if (IsServer(acptr)) | |
189 | link_s[cli_fd(cli_from(acptr))]++; | |
190 | } | |
191 | } | |
192 | ||
193 | /* report all direct connections */ | |
194 | ||
195 | for (i = 0; i <= HighestFd; i++) { | |
196 | const char *conClass; | |
197 | ||
198 | if (!(acptr = LocalClientArray[i])) /* Local Connection? */ | |
199 | continue; | |
200 | if (IsInvisible(acptr) && dow && !(MyConnect(sptr) && IsOper(sptr)) && | |
201 | !IsAnOper(acptr) && (acptr != sptr)) | |
202 | continue; | |
203 | if (!doall && wilds && match(tname, cli_name(acptr))) | |
204 | continue; | |
205 | if (!dow && 0 != ircd_strcmp(tname, cli_name(acptr))) | |
206 | continue; | |
207 | ||
208 | conClass = get_client_class(acptr); | |
209 | ||
210 | switch (cli_status(acptr)) { | |
211 | case STAT_CONNECTING: | |
212 | send_reply(sptr, RPL_TRACECONNECTING, conClass, cli_name(acptr)); | |
213 | cnt++; | |
214 | break; | |
215 | case STAT_HANDSHAKE: | |
216 | send_reply(sptr, RPL_TRACEHANDSHAKE, conClass, cli_name(acptr)); | |
217 | cnt++; | |
218 | break; | |
219 | case STAT_ME: | |
220 | break; | |
221 | case STAT_UNKNOWN: | |
222 | case STAT_UNKNOWN_USER: | |
223 | send_reply(sptr, RPL_TRACEUNKNOWN, conClass, | |
224 | get_client_name(acptr, HIDE_IP)); | |
225 | cnt++; | |
226 | break; | |
227 | case STAT_UNKNOWN_SERVER: | |
228 | send_reply(sptr, RPL_TRACEUNKNOWN, conClass, "Unknown Server"); | |
229 | cnt++; | |
230 | break; | |
231 | case STAT_USER: | |
232 | /* Only opers see users if there is a wildcard | |
233 | but anyone can see all the opers. */ | |
234 | if ((IsAnOper(sptr) && (MyUser(sptr) || | |
235 | !(dow && IsInvisible(acptr)))) || !dow || IsAnOper(acptr)) { | |
236 | if (IsAnOper(acptr)) | |
237 | send_reply(sptr, RPL_TRACEOPERATOR, conClass, | |
238 | get_client_name(acptr, SHOW_IP), | |
239 | CurrentTime - cli_lasttime(acptr)); | |
240 | else | |
241 | send_reply(sptr, RPL_TRACEUSER, conClass, | |
242 | get_client_name(acptr, SHOW_IP), | |
243 | CurrentTime - cli_lasttime(acptr)); | |
244 | cnt++; | |
245 | } | |
246 | break; | |
247 | /* | |
248 | * Connection is a server | |
249 | * | |
250 | * Serv <class> <nS> <nC> <name> <ConnBy> <last> <age> | |
251 | * | |
252 | * class Class the server is in | |
253 | * nS Number of servers reached via this link | |
254 | * nC Number of clients reached via this link | |
255 | * name Name of the server linked | |
256 | * ConnBy Who established this link | |
257 | * last Seconds since we got something from this link | |
258 | * age Seconds this link has been alive | |
259 | * | |
260 | * Additional comments etc...... -Cym-<cym@acrux.net> | |
261 | */ | |
262 | ||
263 | case STAT_SERVER: | |
264 | if (cli_serv(acptr)->user) { | |
265 | if (!cli_serv(acptr)->by[0] | |
266 | || !(acptr2 = findNUser(cli_serv(acptr)->by)) | |
267 | || (cli_user(acptr2) != cli_serv(acptr)->user)) | |
268 | acptr2 = NULL; | |
269 | send_reply(sptr, RPL_TRACESERVER, conClass, link_s[i], | |
270 | link_u[i], cli_name(acptr), | |
271 | acptr2 ? cli_name(acptr2) : "*", | |
272 | cli_serv(acptr)->user->username, | |
273 | cli_serv(acptr)->user->host, | |
274 | CurrentTime - cli_lasttime(acptr), | |
275 | CurrentTime - cli_serv(acptr)->timestamp); | |
276 | } else | |
277 | send_reply(sptr, RPL_TRACESERVER, conClass, link_s[i], | |
278 | link_u[i], cli_name(acptr), | |
279 | (*(cli_serv(acptr))->by) ? cli_serv(acptr)->by : "*", "*", | |
280 | cli_name(&me), CurrentTime - cli_lasttime(acptr), | |
281 | CurrentTime - cli_serv(acptr)->timestamp); | |
282 | cnt++; | |
283 | break; | |
284 | default: /* We actually shouldn't come here, -msa */ | |
285 | send_reply(sptr, RPL_TRACENEWTYPE, get_client_name(acptr, HIDE_IP)); | |
286 | cnt++; | |
287 | break; | |
288 | } | |
289 | } | |
290 | /* | |
291 | * Add these lines to summarize the above which can get rather long | |
292 | * and messy when done remotely - Avalon | |
293 | */ | |
294 | if (IsAnOper(sptr) && doall) { | |
295 | for (cl = get_class_list(); cl; cl = cl->next) { | |
296 | if (Links(cl) > 1) | |
297 | send_reply(sptr, RPL_TRACECLASS, ConClass(cl), Links(cl) - 1); | |
298 | } | |
299 | } | |
300 | send_reply(sptr, RPL_TRACEEND); | |
301 | } | |
302 | ||
303 | /* | |
304 | * m_trace - generic message handler | |
305 | * | |
306 | * parv[0] = sender prefix | |
307 | * parv[1] = nick or servername | |
308 | * parv[2] = 'target' servername | |
309 | */ | |
310 | int m_trace(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
311 | { | |
312 | if (feature_bool(FEAT_HIS_TRACE)) | |
313 | return send_reply(cptr, ERR_NOPRIVILEGES); | |
314 | do_trace(cptr, sptr, parc, parv); | |
315 | return 0; | |
316 | } | |
317 | ||
318 | /* | |
319 | * ms_trace - server message handler | |
320 | * | |
321 | * parv[0] = sender prefix | |
322 | * parv[1] = nick or servername | |
323 | * parv[2] = 'target' servername | |
324 | */ | |
325 | int ms_trace(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
326 | { | |
327 | do_trace(cptr, sptr, parc, parv); | |
328 | return 0; | |
329 | } | |
330 | ||
331 | /* | |
332 | * mo_trace - oper message handler | |
333 | * | |
334 | * parv[0] = sender prefix | |
335 | * parv[1] = nick or servername | |
336 | * parv[2] = 'target' servername | |
337 | */ | |
338 | int mo_trace(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
339 | { | |
340 | if (feature_bool(FEAT_HIS_TRACE) && !IsAnOper(sptr)) | |
341 | return send_reply(cptr, ERR_NOPRIVILEGES); | |
342 | do_trace(cptr, sptr, parc, parv); | |
343 | return 0; | |
344 | } |