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Revision 9562 - (show annotations)
Sat Aug 8 13:18:53 2020 UTC (2 months, 1 week ago) by michael
File MIME type: text/x-chdr
File size: 5065 byte(s)
- m_svsnick.c: actually use 'new_nick' instead of parv[3] which can be a timestamp

1 /*
2 * ircd-hybrid: an advanced, lightweight Internet Relay Chat Daemon (ircd)
3 *
4 * Copyright (c) 1999 Bahamut development team.
5 * Copyright (c) 2011-2020 ircd-hybrid development team
6 *
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 2 of the License, or
10 * (at your option) any later version.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
20 * USA
21 */
22
23 /*! \file m_svsnick.c
24 * \brief Includes required functions for processing the SVSNICK command.
25 * \version $Id$
26 */
27
28
29 #include "stdinc.h"
30 #include "client.h"
31 #include "ircd.h"
32 #include "channel.h"
33 #include "channel_mode.h"
34 #include "send.h"
35 #include "parse.h"
36 #include "modules.h"
37 #include "irc_string.h"
38 #include "user.h"
39 #include "hash.h"
40 #include "watch.h"
41 #include "whowas.h"
42
43
44 /*! \brief SVSNICK command handler
45 *
46 * \param source_p Pointer to allocated Client struct from which the message
47 * originally comes from. This can be a local or remote client.
48 * \param parc Integer holding the number of supplied arguments.
49 * \param parv Argument vector where parv[0] .. parv[parc-1] are non-NULL
50 * pointers.
51 * \note Valid arguments for this command are:
52 * - parv[0] = command
53 * - parv[1] = old nickname
54 * - parv[2] = old timestamp
55 * - parv[3] = new nickname
56 * - parv[4] = new timestamp
57 */
58 static void
59 ms_svsnick(struct Client *source_p, int parc, char *parv[])
60 {
61 const char *new_nick = parc == 5 ? parv[3] : parv[2]; /* TBR: compatibility mode */
62 uintmax_t ts = 0, new_ts = 0;
63
64 if (!HasFlag(source_p, FLAGS_SERVICE))
65 return;
66
67 if (valid_nickname(new_nick, true) == false)
68 return;
69
70 struct Client *target_p = find_person(source_p, parv[1]);
71 if (target_p == NULL)
72 return;
73
74 if (parc == 5) /* TBR: compatibility mode */
75 {
76 ts = strtoumax(parv[2], NULL, 10);
77 if (ts && (ts != target_p->tsinfo))
78 return;
79 }
80 else /* parc == 4 */
81 ts = strtoumax(parv[3], NULL, 10);
82
83 if (parc == 4) /* TBR: compatibility mode */
84 new_ts = ts;
85 else
86 new_ts = strtoumax(parv[4], NULL, 10);
87
88 if (!MyConnect(target_p))
89 {
90 if (target_p->from == source_p->from)
91 {
92 sendto_realops_flags(UMODE_DEBUG, L_ALL, SEND_NOTICE,
93 "Received wrong-direction SVSNICK "
94 "for %s (behind %s) from %s",
95 target_p->name, source_p->from->name,
96 client_get_name(source_p, HIDE_IP));
97 return;
98 }
99
100 sendto_one(target_p, ":%s SVSNICK %s %ju %s %ju", source_p->id,
101 target_p->id, ts, new_nick, new_ts);
102 return;
103 }
104
105 struct Client *exists_p = hash_find_client(new_nick);
106 if (exists_p)
107 {
108 if (target_p == exists_p)
109 {
110 if (strcmp(target_p->name, new_nick) == 0)
111 return;
112 }
113 else if (IsUnknown(exists_p))
114 exit_client(exists_p, "SVSNICK Override");
115 else
116 {
117 exit_client(target_p, "SVSNICK Collide");
118 return;
119 }
120 }
121
122 target_p->tsinfo = new_ts;
123 clear_ban_cache_list(&target_p->channel);
124 watch_check_hash(target_p, RPL_LOGOFF);
125
126 if (HasUMode(target_p, UMODE_REGISTERED))
127 {
128 const unsigned int oldmodes = target_p->umodes;
129 char buf[UMODE_MAX_STR] = "";
130
131 DelUMode(target_p, UMODE_REGISTERED);
132 send_umode(target_p, true, oldmodes, buf);
133 }
134
135 sendto_common_channels_local(target_p, true, 0, 0, ":%s!%s@%s NICK :%s",
136 target_p->name, target_p->username,
137 target_p->host, new_nick);
138
139 whowas_add_history(target_p, true);
140
141 sendto_server(NULL, 0, 0, ":%s NICK %s :%ju",
142 target_p->id, new_nick, target_p->tsinfo);
143
144 hash_del_client(target_p);
145 strlcpy(target_p->name, new_nick, sizeof(target_p->name));
146 hash_add_client(target_p);
147
148 watch_check_hash(target_p, RPL_LOGON);
149
150 fd_note(target_p->connection->fd, "Nick: %s", target_p->name);
151 }
152
153 static struct Message svsnick_msgtab =
154 {
155 .cmd = "SVSNICK",
156 .handlers[UNREGISTERED_HANDLER] = { .handler = m_unregistered },
157 .handlers[CLIENT_HANDLER] = { .handler = m_ignore },
158 .handlers[SERVER_HANDLER] = { .handler = ms_svsnick, .args_min = 4 },
159 .handlers[ENCAP_HANDLER] = { .handler = m_ignore },
160 .handlers[OPER_HANDLER] = { .handler = m_ignore }
161 };
162
163 static void
164 module_init(void)
165 {
166 mod_add_cmd(&svsnick_msgtab);
167 }
168
169 static void
170 module_exit(void)
171 {
172 mod_del_cmd(&svsnick_msgtab);
173 }
174
175 struct module module_entry =
176 {
177 .version = "$Revision$",
178 .modinit = module_init,
179 .modexit = module_exit,
180 };

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