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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_gline.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_gline.c,v 1.26 2004/12/11 05:13:46 klmitch 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 "client.h" | |
85 | #include "gline.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_conf.h" | |
97 | #include "s_misc.h" | |
98 | #include "send.h" | |
99 | ||
100 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
101 | #include <stdlib.h> | |
102 | #include <string.h> | |
103 | ||
104 | /* | |
105 | * ms_gline - server message handler | |
106 | * | |
107 | * parv[0] = Sender prefix | |
108 | * parv[1] = Target: server numeric | |
109 | * parv[2] = (+|-)<G-line mask> | |
110 | * parv[3] = G-line lifetime | |
111 | * | |
112 | * From Uworld: | |
113 | * | |
114 | * parv[4] = Comment | |
115 | * | |
116 | * From somewhere else: | |
117 | * | |
118 | * parv[4] = Last modification time | |
119 | * parv[5] = Comment | |
120 | * | |
121 | */ | |
122 | int | |
123 | ms_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) | |
124 | { | |
125 | struct Client *acptr = 0; | |
126 | struct Gline *agline; | |
127 | unsigned int flags = 0; | |
128 | time_t expire_off, lastmod = 0; | |
129 | char *mask = parv[2], *target = parv[1], *reason = "No reason"; | |
130 | ||
131 | if (*mask == '!') | |
132 | { | |
133 | mask++; | |
134 | flags |= GLINE_OPERFORCE; /* assume oper had WIDE_GLINE */ | |
135 | } | |
136 | ||
137 | if ((parc == 3 && *mask == '-') || parc == 5) | |
138 | { | |
139 | if (!find_conf_byhost(cli_confs(cptr), cli_name(sptr), CONF_UWORLD)) | |
140 | return need_more_params(sptr, "GLINE"); | |
141 | ||
142 | if (parc > 4) | |
143 | reason = parv[4]; | |
144 | flags |= GLINE_FORCE; | |
145 | } | |
146 | else if (parc > 5) | |
147 | { | |
148 | lastmod = atoi(parv[4]); | |
149 | reason = parv[5]; | |
150 | } | |
151 | else | |
152 | return need_more_params(sptr, "GLINE"); | |
153 | ||
154 | if (IsServer(sptr)) | |
155 | flags |= GLINE_FORCE; | |
156 | ||
157 | if (!(target[0] == '*' && target[1] == '\0')) { | |
158 | if (!(acptr = FindNServer(target))) | |
159 | return 0; /* no such server */ | |
160 | ||
161 | if (!IsMe(acptr)) { /* manually propagate */ | |
162 | if (!lastmod) | |
163 | sendcmdto_one(sptr, CMD_GLINE, acptr, | |
164 | (parc == 3) ? "%C %s" : "%C %s %s :%s", acptr, mask, | |
165 | parv[3], reason); | |
166 | else | |
167 | sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%s %s %s :%s", acptr, | |
168 | flags & GLINE_OPERFORCE ? "!" : "", mask, parv[3], | |
169 | parv[4], reason); | |
170 | ||
171 | return 0; | |
172 | } | |
173 | ||
174 | flags |= GLINE_LOCAL; | |
175 | } | |
176 | ||
177 | if (*mask == '-') | |
178 | mask++; | |
179 | else if (*mask == '+') { | |
180 | flags |= GLINE_ACTIVE; | |
181 | mask++; | |
182 | } else | |
183 | flags |= GLINE_ACTIVE; | |
184 | ||
185 | expire_off = parc < 5 ? 0 : atoi(parv[3]); | |
186 | ||
187 | agline = gline_find(mask, GLINE_ANY | GLINE_EXACT); | |
188 | ||
189 | if (agline) { | |
190 | if (GlineIsLocal(agline) && !(flags & GLINE_LOCAL)) /* global over local */ | |
191 | gline_free(agline); | |
192 | else if (!lastmod && ((flags & GLINE_ACTIVE) == GlineIsRemActive(agline))) | |
193 | return gline_propagate(cptr, sptr, agline); | |
194 | else if (!lastmod || GlineLastMod(agline) < lastmod) { /* new mod */ | |
195 | if (flags & GLINE_ACTIVE) | |
196 | return gline_activate(cptr, sptr, agline, lastmod, flags); | |
197 | else | |
198 | return gline_deactivate(cptr, sptr, agline, lastmod, flags); | |
199 | } else if (GlineLastMod(agline) == lastmod || IsBurstOrBurstAck(cptr)) | |
200 | return 0; | |
201 | else | |
202 | return gline_resend(cptr, agline); /* other server desynched WRT gline */ | |
203 | } else if (parc == 3 && !(flags & GLINE_ACTIVE)) { | |
204 | /* U-lined server removing a G-line we don't have; propagate the removal | |
205 | * anyway. | |
206 | */ | |
207 | if (!(flags & GLINE_LOCAL)) | |
208 | sendcmdto_serv_butone(sptr, CMD_GLINE, cptr, "* -%s", mask); | |
209 | return 0; | |
210 | } else if (parc < 5) | |
211 | return need_more_params(sptr, "GLINE"); | |
212 | ||
213 | return gline_add(cptr, sptr, mask, reason, expire_off, lastmod, flags); | |
214 | } | |
215 | ||
216 | /* | |
217 | * mo_gline - oper message handler | |
218 | * | |
219 | * parv[0] = Sender prefix | |
220 | * parv[1] = [[+|-]<G-line mask>] | |
221 | * | |
222 | * Local (to me) style: | |
223 | * | |
224 | * parv[2] = [Expiration offset] | |
225 | * parv[3] = [Comment] | |
226 | * | |
227 | * Global (or remote local) style: | |
228 | * | |
229 | * parv[2] = [target] | |
230 | * parv[3] = [Expiration offset] | |
231 | * parv[4] = [Comment] | |
232 | * | |
233 | */ | |
234 | int | |
235 | mo_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) | |
236 | { | |
237 | struct Client *acptr = 0; | |
238 | struct Gline *agline; | |
239 | unsigned int flags = 0; | |
240 | time_t expire_off; | |
241 | char *mask = parv[1], *target = 0, *reason; | |
242 | ||
243 | if (parc < 2) | |
244 | return gline_list(sptr, 0); | |
245 | ||
246 | if (*mask == '!') { | |
247 | mask++; | |
248 | ||
249 | if (HasPriv(sptr, PRIV_WIDE_GLINE)) | |
250 | flags |= GLINE_OPERFORCE; | |
251 | } | |
252 | ||
253 | if (*mask == '+') { | |
254 | flags |= GLINE_ACTIVE; | |
255 | mask++; | |
256 | ||
257 | } else if (*mask == '-') | |
258 | mask++; | |
259 | else | |
260 | return gline_list(sptr, mask); | |
261 | ||
262 | if (parc == 4) { | |
263 | expire_off = atoi(parv[2]); | |
264 | reason = parv[3]; | |
265 | flags |= GLINE_LOCAL; | |
266 | } else if (parc > 4) { | |
267 | target = parv[2]; | |
268 | expire_off = atoi(parv[3]); | |
269 | reason = parv[4]; | |
270 | } else | |
271 | return need_more_params(sptr, "GLINE"); | |
272 | ||
273 | if (target) | |
274 | { | |
275 | if (!(target[0] == '*' && target[1] == '\0')) | |
276 | { | |
277 | if (!(acptr = find_match_server(target))) | |
278 | return send_reply(sptr, ERR_NOSUCHSERVER, target); | |
279 | ||
280 | /* manually propagate, since we don't set it */ | |
281 | if (!IsMe(acptr)) | |
282 | { | |
283 | if (!feature_bool(FEAT_CONFIG_OPERCMDS)) | |
284 | return send_reply(sptr, ERR_DISABLED, "GLINE"); | |
285 | ||
286 | if (!HasPriv(sptr, PRIV_GLINE)) | |
287 | return send_reply(sptr, ERR_NOPRIVILEGES); | |
288 | ||
289 | sendcmdto_one(sptr, CMD_GLINE, acptr, "%C %s%c%s %s %Tu :%s", acptr, | |
290 | flags & GLINE_OPERFORCE ? "!" : "", | |
291 | flags & GLINE_ACTIVE ? '+' : '-', mask, parv[3], | |
292 | TStime(), reason); | |
293 | return 0; | |
294 | } | |
295 | flags |= GLINE_LOCAL; | |
296 | } | |
297 | } | |
298 | ||
299 | if (!(flags & GLINE_LOCAL) && !feature_bool(FEAT_CONFIG_OPERCMDS)) | |
300 | return send_reply(sptr, ERR_DISABLED, "GLINE"); | |
301 | ||
302 | if (!HasPriv(sptr, (flags & GLINE_LOCAL ? PRIV_LOCAL_GLINE : PRIV_GLINE))) | |
303 | return send_reply(sptr, ERR_NOPRIVILEGES); | |
304 | ||
305 | agline = gline_find(mask, GLINE_ANY | GLINE_EXACT); | |
306 | ||
307 | if (agline) { | |
308 | if (GlineIsLocal(agline) && !(flags & GLINE_LOCAL)) /* global over local */ | |
309 | gline_free(agline); | |
310 | else { | |
311 | if (!GlineLastMod(agline)) /* force mods to Uworld-set G-lines local */ | |
312 | flags |= GLINE_LOCAL; | |
313 | ||
314 | if (flags & GLINE_ACTIVE) | |
315 | return gline_activate(cptr, sptr, agline, | |
316 | GlineLastMod(agline) ? TStime() : 0, flags); | |
317 | else | |
318 | return gline_deactivate(cptr, sptr, agline, | |
319 | GlineLastMod(agline) ? TStime() : 0, flags); | |
320 | } | |
321 | } | |
322 | ||
323 | return gline_add(cptr, sptr, mask, reason, expire_off, TStime(), flags); | |
324 | } | |
325 | ||
326 | /* | |
327 | * m_gline - user message handler | |
328 | * | |
329 | * parv[0] = Sender prefix | |
330 | * parv[1] = [<server name>] | |
331 | * | |
332 | */ | |
333 | int | |
334 | m_gline(struct Client *cptr, struct Client *sptr, int parc, char *parv[]) | |
335 | { | |
336 | if (parc < 2) | |
337 | return send_reply(sptr, ERR_NOSUCHGLINE, ""); | |
338 | ||
339 | return gline_list(sptr, parv[1]); | |
340 | } |