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1 | /* | |
2 | * ircd-ratbox: A slightly useful ircd. | |
3 | * m_svinfo.c: Sends TS information for clock & compatibility checks. | |
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 | #include "stdinc.h" | |
25 | #include "client.h" | |
26 | #include "match.h" | |
27 | #include "ircd.h" | |
28 | #include "numeric.h" | |
29 | #include "send.h" | |
30 | #include "s_conf.h" | |
31 | #include "s_newconf.h" | |
32 | #include "logger.h" | |
33 | #include "msg.h" | |
34 | #include "parse.h" | |
35 | #include "modules.h" | |
36 | ||
37 | static const char svinfo_desc[] = | |
38 | "Provides TS6 SVINFO command to ensure version and clock synchronisation"; | |
39 | ||
40 | static void ms_svinfo(struct MsgBuf *, struct Client *, struct Client *, int, const char **); | |
41 | struct Message svinfo_msgtab = { | |
42 | "SVINFO", 0, 0, 0, 0, | |
43 | {mg_unreg, mg_ignore, mg_ignore, {ms_svinfo, 5}, mg_ignore, mg_ignore} | |
44 | }; | |
45 | ||
46 | mapi_clist_av1 svinfo_clist[] = { &svinfo_msgtab, NULL }; | |
47 | DECLARE_MODULE_AV2(svinfo, NULL, NULL, svinfo_clist, NULL, NULL, NULL, NULL, svinfo_desc); | |
48 | ||
49 | /* | |
50 | * ms_svinfo - SVINFO message handler | |
51 | * parv[1] = TS_CURRENT for the server | |
52 | * parv[2] = TS_MIN for the server | |
53 | * parv[3] = unused, send 0 | |
54 | * parv[4] = server's idea of UTC time | |
55 | */ | |
56 | static void | |
57 | ms_svinfo(struct MsgBuf *msgbuf_p, struct Client *client_p, struct Client *source_p, int parc, const char *parv[]) | |
58 | { | |
59 | signed long deltat; | |
60 | time_t theirtime; | |
61 | char squitreason[120]; | |
62 | ||
63 | /* SVINFO isnt remote. */ | |
64 | if(source_p != client_p) | |
65 | return; | |
66 | ||
67 | if(TS_CURRENT < atoi(parv[2]) || atoi(parv[1]) < TS_MIN) | |
68 | { | |
69 | /* TS version is too low on one of the sides, drop the link */ | |
70 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
71 | "Link %s dropped, wrong TS protocol version (%s,%s)", | |
72 | source_p->name, parv[1], parv[2]); | |
73 | snprintf(squitreason, sizeof squitreason, "Incompatible TS version (%s,%s)", | |
74 | parv[1], parv[2]); | |
75 | exit_client(source_p, source_p, source_p, squitreason); | |
76 | return; | |
77 | } | |
78 | ||
79 | /* | |
80 | * since we're here, might as well set rb_current_time() while we're at it | |
81 | */ | |
82 | rb_set_time(); | |
83 | theirtime = atol(parv[4]); | |
84 | deltat = labs(theirtime - rb_current_time()); | |
85 | ||
86 | if(deltat > ConfigFileEntry.ts_max_delta) | |
87 | { | |
88 | sendto_realops_snomask(SNO_GENERAL, L_ALL, | |
89 | "Link %s dropped, excessive TS delta" | |
90 | " (my TS=%ld, their TS=%ld, delta=%ld)", | |
91 | source_p->name, | |
92 | (long) rb_current_time(), (long) theirtime, deltat); | |
93 | ilog(L_SERVER, | |
94 | "Link %s dropped, excessive TS delta" | |
95 | " (my TS=%ld, their TS=%ld, delta=%ld)", | |
96 | log_client_name(source_p, SHOW_IP), (long) rb_current_time(), (long) theirtime, deltat); | |
97 | snprintf(squitreason, sizeof squitreason, "Excessive TS delta (my TS=%ld, their TS=%ld, delta=%ld)", | |
98 | (long) rb_current_time(), (long) theirtime, deltat); | |
99 | disable_server_conf_autoconn(source_p->name); | |
100 | exit_client(source_p, source_p, source_p, squitreason); | |
101 | return; | |
102 | } | |
103 | ||
104 | if(deltat > ConfigFileEntry.ts_warn_delta) | |
105 | { | |
106 | sendto_realops_snomask(SNO_GENERAL, L_NETWIDE, | |
107 | "Link %s notable TS delta" | |
108 | " (my TS=%ld, their TS=%ld, delta=%ld)", | |
109 | source_p->name, (long) rb_current_time(), (long) theirtime, deltat); | |
110 | } | |
111 | } |