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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_settime.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_settime.c,v 1.15 2004/12/11 05:14:03 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 "hash.h" | |
86 | #include "ircd.h" | |
87 | #include "ircd_features.h" | |
88 | #include "ircd_log.h" | |
89 | #include "ircd_reply.h" | |
90 | #include "ircd_snprintf.h" | |
91 | #include "ircd_string.h" | |
92 | #include "list.h" | |
93 | #include "msg.h" | |
94 | #include "numeric.h" | |
95 | #include "numnicks.h" | |
96 | #include "s_user.h" | |
97 | #include "send.h" | |
98 | #include "struct.h" | |
99 | ||
100 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
101 | #include <stdlib.h> | |
102 | ||
103 | /* | |
104 | * ms_settime - server message handler | |
105 | * | |
106 | * parv[0] = sender prefix | |
107 | * parv[1] = new time | |
108 | * parv[2] = server name (Only used when sptr is an Oper). | |
109 | */ | |
110 | int ms_settime(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
111 | { | |
112 | time_t t; | |
113 | long dt; | |
114 | static char tbuf[11]; | |
115 | struct DLink *lp; | |
116 | ||
117 | if (parc < 2) /* verify argument count */ | |
118 | return need_more_params(sptr, "SETTIME"); | |
119 | ||
120 | t = atoi(parv[1]); /* convert time and compute delta */ | |
121 | dt = TStime() - t; | |
122 | ||
123 | /* verify value */ | |
124 | if (t < OLDEST_TS || dt < -9000000) | |
125 | { | |
126 | if (IsServer(sptr)) /* protocol violation if it's from a server */ | |
127 | protocol_violation(sptr, "SETTIME: Bad value (%Tu, delta %ld)", t, dt); | |
128 | else | |
129 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :SETTIME: Bad value (%Tu, " | |
130 | "delta %ld)", sptr, t, dt); | |
131 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :SETTIME: Bad value", sptr); | |
132 | return 0; | |
133 | } | |
134 | ||
135 | /* reset time... */ | |
136 | if (feature_bool(FEAT_RELIABLE_CLOCK)) | |
137 | { | |
138 | ircd_snprintf(0, tbuf, sizeof(tbuf), "%Tu", TStime()); | |
139 | parv[1] = tbuf; | |
140 | } | |
141 | ||
142 | if (BadPtr(parv[2])) /* spam the network */ | |
143 | { | |
144 | for (lp = cli_serv(&me)->down; lp; lp = lp->next) | |
145 | if (cptr != lp->value.cptr) | |
146 | sendcmdto_prio_one(sptr, CMD_SETTIME, lp->value.cptr, "%s", parv[1]); | |
147 | } | |
148 | else | |
149 | { | |
150 | if (hunt_server_prio_cmd(sptr, CMD_SETTIME, cptr, 1, "%s %C", 2, parc, | |
151 | parv) != HUNTED_ISME) | |
152 | { | |
153 | /* If the destination was *not* me, but I'm RELIABLE_CLOCK and the | |
154 | * delta is more than 30 seconds off, bounce back a corrected | |
155 | * SETTIME | |
156 | */ | |
157 | if (feature_bool(FEAT_RELIABLE_CLOCK) && (dt > 30 || dt < -30)) | |
158 | sendcmdto_prio_one(&me, CMD_SETTIME, cptr, "%s %C", parv[1], cptr); | |
159 | return 0; | |
160 | } | |
161 | } | |
162 | ||
163 | if (feature_bool(FEAT_RELIABLE_CLOCK)) | |
164 | { | |
165 | /* don't apply settime--reliable */ | |
166 | if ((dt > 600) || (dt < -600)) | |
167 | sendcmdto_serv_butone(&me, CMD_DESYNCH, 0, ":Bad SETTIME from %s: %Tu " | |
168 | "(delta %ld)", cli_name(sptr), t, dt); | |
169 | /* Let user know we're ignoring him */ | |
170 | if (IsUser(sptr)) | |
171 | { | |
172 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is not set %ld " | |
173 | "seconds %s : RELIABLE_CLOCK is defined", sptr, | |
174 | (dt < 0) ? -dt : dt, (dt < 0) ? "forwards" : "backwards"); | |
175 | } | |
176 | } | |
177 | else /* tell opers about time change */ | |
178 | { | |
179 | sendto_opmask_butone(0, SNO_OLDSNO, "SETTIME from %s, clock is set %ld " | |
180 | "seconds %s", cli_name(sptr), (dt < 0) ? -dt : dt, | |
181 | (dt < 0) ? "forwards" : "backwards"); | |
182 | /* Apply time change... */ | |
183 | TSoffset -= dt; | |
184 | /* Let the issuing user know what we did... */ | |
185 | if (IsUser(sptr)) | |
186 | { | |
187 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is set %ld seconds %s", | |
188 | sptr, (dt < 0) ? -dt : dt, | |
189 | (dt < 0) ? "forwards" : "backwards"); | |
190 | } | |
191 | } | |
192 | ||
193 | return 0; | |
194 | } | |
195 | ||
196 | /* | |
197 | * mo_settime - oper message handler | |
198 | * | |
199 | * parv[0] = sender prefix | |
200 | * parv[1] = new time | |
201 | * parv[2] = servername (Only used when sptr is an Oper). | |
202 | */ | |
203 | int mo_settime(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
204 | { | |
205 | time_t t; | |
206 | long dt; | |
207 | static char tbuf[11]; | |
208 | ||
209 | /* Must be a global oper */ | |
210 | if (!IsOper(sptr)) | |
211 | return send_reply(sptr, ERR_NOPRIVILEGES); | |
212 | ||
213 | if (parc < 2) /* verify argument count */ | |
214 | return need_more_params(sptr, "SETTIME"); | |
215 | ||
216 | if (parc == 2 && MyUser(sptr)) /* default to me */ | |
217 | parv[parc++] = cli_name(&me); | |
218 | ||
219 | t = atoi(parv[1]); /* convert the time */ | |
220 | ||
221 | /* If we're reliable_clock or if the oper specified a 0 time, use current */ | |
222 | if (!t || feature_bool(FEAT_RELIABLE_CLOCK)) | |
223 | { | |
224 | t = TStime(); | |
225 | ircd_snprintf(0, tbuf, sizeof(tbuf), "%Tu", TStime()); | |
226 | parv[1] = tbuf; | |
227 | } | |
228 | ||
229 | dt = TStime() - t; /* calculate the delta */ | |
230 | ||
231 | if (t < OLDEST_TS || dt < -9000000) /* verify value */ | |
232 | { | |
233 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :SETTIME: Bad value", sptr); | |
234 | return 0; | |
235 | } | |
236 | ||
237 | /* OK, send the message off to its destination */ | |
238 | if (hunt_server_prio_cmd(sptr, CMD_SETTIME, cptr, 1, "%s %C", 2, parc, | |
239 | parv) != HUNTED_ISME) | |
240 | return 0; | |
241 | ||
242 | if (feature_bool(FEAT_RELIABLE_CLOCK)) /* don't apply settime--reliable */ | |
243 | { | |
244 | if ((dt > 600) || (dt < -600)) | |
245 | sendcmdto_serv_butone(&me, CMD_DESYNCH, 0, ":Bad SETTIME from %s: %Tu " | |
246 | "(delta %ld)", cli_name(sptr), t, dt); | |
247 | if (IsUser(sptr)) /* Let user know we're ignoring him */ | |
248 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is not set %ld seconds " | |
249 | "%s: RELIABLE_CLOCK is defined", sptr, (dt < 0) ? -dt : dt, | |
250 | (dt < 0) ? "forwards" : "backwards"); | |
251 | } | |
252 | else /* tell opers about time change */ | |
253 | { | |
254 | sendto_opmask_butone(0, SNO_OLDSNO, "SETTIME from %s, clock is set %ld " | |
255 | "seconds %s", cli_name(sptr), (dt < 0) ? -dt : dt, | |
256 | (dt < 0) ? "forwards" : "backwards"); | |
257 | TSoffset -= dt; /* apply time change */ | |
258 | if (IsUser(sptr)) /* let user know what we did */ | |
259 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :clock is set %ld seconds %s", | |
260 | sptr, (dt < 0) ? -dt : dt, | |
261 | (dt < 0) ? "forwards" : "backwards"); | |
262 | } | |
263 | ||
264 | return 0; | |
265 | } |