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1 | /* | |
2 | * IRC - Internet Relay Chat, ircd/m_jupe.c | |
3 | * Copyright (C) 1990 Jarkko Oikarinen and | |
4 | * University of Oulu, Computing Center | |
5 | * Copyright (C) 2000 Kevin L. Mitchell <klmitch@mit.edu> | |
6 | * | |
7 | * See file AUTHORS in IRC package for additional names of | |
8 | * the programmers. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 1, or (at your option) | |
13 | * any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, | |
16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
18 | * GNU General Public License for more details. | |
19 | * | |
20 | * You should have received a copy of the GNU General Public License | |
21 | * along with this program; if not, write to the Free Software | |
22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
23 | * | |
24 | * $Id: m_jupe.c,v 1.15.2.1 2006/12/19 05:20:48 entrope Exp $ | |
25 | */ | |
26 | ||
27 | /* | |
28 | * m_functions execute protocol messages on this server: | |
29 | * | |
30 | * cptr is always NON-NULL, pointing to a *LOCAL* client | |
31 | * structure (with an open socket connected!). This | |
32 | * identifies the physical socket where the message | |
33 | * originated (or which caused the m_function to be | |
34 | * executed--some m_functions may call others...). | |
35 | * | |
36 | * sptr is the source of the message, defined by the | |
37 | * prefix part of the message if present. If not | |
38 | * or prefix not found, then sptr==cptr. | |
39 | * | |
40 | * (!IsServer(cptr)) => (cptr == sptr), because | |
41 | * prefixes are taken *only* from servers... | |
42 | * | |
43 | * (IsServer(cptr)) | |
44 | * (sptr == cptr) => the message didn't | |
45 | * have the prefix. | |
46 | * | |
47 | * (sptr != cptr && IsServer(sptr) means | |
48 | * the prefix specified servername. (?) | |
49 | * | |
50 | * (sptr != cptr && !IsServer(sptr) means | |
51 | * that message originated from a remote | |
52 | * user (not local). | |
53 | * | |
54 | * combining | |
55 | * | |
56 | * (!IsServer(sptr)) means that, sptr can safely | |
57 | * taken as defining the target structure of the | |
58 | * message in this server. | |
59 | * | |
60 | * *Always* true (if 'parse' and others are working correct): | |
61 | * | |
62 | * 1) sptr->from == cptr (note: cptr->from == cptr) | |
63 | * | |
64 | * 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr | |
65 | * *cannot* be a local connection, unless it's | |
66 | * actually cptr!). [MyConnect(x) should probably | |
67 | * be defined as (x == x->from) --msa ] | |
68 | * | |
69 | * parc number of variable parameter strings (if zero, | |
70 | * parv is allowed to be NULL) | |
71 | * | |
72 | * parv a NULL terminated list of parameter pointers, | |
73 | * | |
74 | * parv[0], sender (prefix string), if not present | |
75 | * this points to an empty string. | |
76 | * parv[1]...parv[parc-1] | |
77 | * pointers to additional parameters | |
78 | * parv[parc] == NULL, *always* | |
79 | * | |
80 | * note: it is guaranteed that parv[0]..parv[parc-1] are all | |
81 | * non-NULL pointers. | |
82 | */ | |
83 | #include "config.h" | |
84 | ||
85 | #include "client.h" | |
86 | #include "jupe.h" | |
87 | #include "hash.h" | |
88 | #include "ircd.h" | |
89 | #include "ircd_features.h" | |
90 | #include "ircd_log.h" | |
91 | #include "ircd_reply.h" | |
92 | #include "ircd_string.h" | |
93 | #include "match.h" | |
94 | #include "msg.h" | |
95 | #include "numeric.h" | |
96 | #include "numnicks.h" | |
97 | #include "s_conf.h" | |
98 | #include "s_misc.h" | |
99 | #include "send.h" | |
100 | ||
101 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
102 | #include <stdlib.h> | |
103 | #include <string.h> | |
104 | ||
105 | /* | |
106 | * ms_jupe - server message handler | |
107 | * | |
108 | * parv[0] = Send prefix | |
109 | * | |
110 | * From server: | |
111 | * | |
112 | * parv[1] = Target: server numeric or * | |
113 | * parv[2] = (+|-)<server name> | |
114 | * parv[3] = Expiration offset | |
115 | * parv[4] = Last modification time | |
116 | * parv[5] = Comment | |
117 | * | |
118 | */ | |
119 | int ms_jupe(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
120 | { | |
121 | struct Client *acptr = 0; | |
122 | struct Jupe *ajupe; | |
123 | unsigned int flags = 0; | |
124 | time_t expire_off, lastmod; | |
125 | char *server = parv[2], *target = parv[1], *reason = parv[5]; | |
126 | ||
127 | if (parc < 6) | |
128 | return need_more_params(sptr, "JUPE"); | |
129 | ||
130 | if (!(target[0] == '*' && target[1] == '\0')) { | |
131 | if (!(acptr = FindNServer(target))) | |
132 | return 0; /* no such server */ | |
133 | ||
134 | if (!IsMe(acptr)) { /* manually propagate, since we don't set it */ | |
135 | sendcmdto_one(sptr, CMD_JUPE, acptr, "%s %s %s %s :%s", target, server, | |
136 | parv[3], parv[4], reason); | |
137 | return 0; | |
138 | } | |
139 | ||
140 | flags |= JUPE_LOCAL; | |
141 | } | |
142 | ||
143 | if (*server == '-') | |
144 | server++; | |
145 | else if (*server == '+') { | |
146 | flags |= JUPE_ACTIVE; | |
147 | server++; | |
148 | } | |
149 | ||
150 | expire_off = atoi(parv[3]); | |
151 | lastmod = atoi(parv[4]); | |
152 | ||
153 | ajupe = jupe_find(server); | |
154 | ||
155 | if (ajupe) { | |
156 | if (JupeIsLocal(ajupe) && !(flags & JUPE_LOCAL)) /* global over local */ | |
157 | jupe_free(ajupe); | |
158 | else if (JupeLastMod(ajupe) < lastmod) { /* new modification */ | |
159 | if (flags & JUPE_ACTIVE) | |
160 | return jupe_activate(cptr, sptr, ajupe, lastmod, flags); | |
161 | else | |
162 | return jupe_deactivate(cptr, sptr, ajupe, lastmod, flags); | |
163 | } else if (JupeLastMod(ajupe) == lastmod || IsBurstOrBurstAck(cptr)) | |
164 | return 0; | |
165 | else | |
166 | return jupe_resend(cptr, ajupe); /* other server desynched WRT jupes */ | |
167 | } | |
168 | ||
169 | return jupe_add(cptr, sptr, server, reason, expire_off, lastmod, flags); | |
170 | } | |
171 | ||
172 | /* | |
173 | * mo_jupe - oper message handler | |
174 | * | |
175 | * parv[0] = Send prefix | |
176 | * parv[1] = [[+|-]<server name>] | |
177 | * | |
178 | * Local (to me) style: | |
179 | * | |
180 | * parv[2] = [Expiration offset] | |
181 | * parv[3] = [Comment] | |
182 | * | |
183 | * Global (or remote local) style: | |
184 | * | |
185 | * parv[2] = [target] | |
186 | * parv[3] = [Expiration offset] | |
187 | * parv[4] = [Comment] | |
188 | * | |
189 | */ | |
190 | int mo_jupe(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
191 | { | |
192 | struct Client *acptr = 0; | |
193 | struct Jupe *ajupe; | |
194 | unsigned int flags = 0; | |
195 | time_t expire_off; | |
196 | char *server = parv[1], *target = 0, *reason; | |
197 | ||
198 | if (parc < 2) | |
199 | return jupe_list(sptr, 0); | |
200 | ||
201 | if (*server == '+') { | |
202 | flags |= JUPE_ACTIVE; | |
203 | server++; | |
204 | } else if (*server == '-') | |
205 | server++; | |
206 | else | |
207 | return jupe_list(sptr, server); | |
208 | ||
209 | if (!feature_bool(FEAT_CONFIG_OPERCMDS)) | |
210 | return send_reply(sptr, ERR_DISABLED, "JUPE"); | |
211 | ||
212 | if (parc == 4) { | |
213 | expire_off = atoi(parv[2]); | |
214 | reason = parv[3]; | |
215 | flags |= JUPE_LOCAL; | |
216 | } else if (parc > 4) { | |
217 | target = parv[2]; | |
218 | expire_off = atoi(parv[3]); | |
219 | reason = parv[4]; | |
220 | } else | |
221 | return need_more_params(sptr, "JUPE"); | |
222 | ||
223 | if (target) { | |
224 | if (!(target[0] == '*' && target[1] == '\0')) { | |
225 | if (!(acptr = find_match_server(target))) | |
226 | return send_reply(sptr, ERR_NOSUCHSERVER, target); | |
227 | ||
228 | if (!IsMe(acptr)) { /* manually propagate, since we don't set it */ | |
229 | if (!HasPriv(sptr, PRIV_JUPE)) | |
230 | return send_reply(sptr, ERR_NOPRIVILEGES); | |
231 | ||
232 | sendcmdto_one(sptr, CMD_JUPE, acptr, "%C %c%s %s %Tu :%s", acptr, | |
233 | flags & JUPE_ACTIVE ? '+' : '-', server, parv[3], | |
234 | TStime(), reason); | |
235 | return 0; | |
236 | } else if (!HasPriv(sptr, PRIV_LOCAL_JUPE)) | |
237 | return send_reply(sptr, ERR_NOPRIVILEGES); | |
238 | ||
239 | flags |= JUPE_LOCAL; | |
240 | } else if (!HasPriv(sptr, PRIV_JUPE)) | |
241 | return send_reply(sptr, ERR_NOPRIVILEGES); | |
242 | } | |
243 | ||
244 | ajupe = jupe_find(server); | |
245 | ||
246 | if (ajupe) { | |
247 | if (JupeIsLocal(ajupe) && !(flags & JUPE_LOCAL)) /* global over local */ | |
248 | jupe_free(ajupe); | |
249 | else { | |
250 | if (flags & JUPE_ACTIVE) | |
251 | return jupe_activate(cptr, sptr, ajupe, TStime(), flags); | |
252 | else | |
253 | return jupe_deactivate(cptr, sptr, ajupe, TStime(), flags); | |
254 | } | |
255 | } | |
256 | ||
257 | return jupe_add(cptr, sptr, server, reason, expire_off, TStime(), flags); | |
258 | } | |
259 | ||
260 | /* | |
261 | * m_jupe - user message handler | |
262 | * | |
263 | * parv[0] = Send prefix | |
264 | * | |
265 | * From user: | |
266 | * | |
267 | * parv[1] = [<server name>] | |
268 | * | |
269 | */ | |
270 | int m_jupe(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
271 | { | |
272 | if (parc < 2) | |
273 | return jupe_list(sptr, 0); | |
274 | ||
275 | return jupe_list(sptr, parv[1]); | |
276 | } |