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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_uping.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_uping.c,v 1.8 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_log.h" | |
88 | #include "ircd_reply.h" | |
89 | #include "ircd_string.h" | |
90 | #include "match.h" | |
91 | #include "msg.h" | |
92 | #include "numeric.h" | |
93 | #include "numnicks.h" | |
94 | #include "s_conf.h" | |
95 | #include "s_user.h" | |
96 | #include "send.h" | |
97 | #include "uping.h" | |
98 | ||
99 | ||
100 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
101 | #include <stdlib.h> | |
102 | #include <string.h> | |
103 | ||
104 | /* | |
105 | * ms_uping - server message handler | |
106 | * | |
107 | * m_uping -- by Run | |
108 | * | |
109 | * parv[0] = sender prefix | |
110 | * parv[1] = pinged server | |
111 | * parv[2] = port | |
112 | * parv[3] = hunted server | |
113 | * parv[4] = number of requested pings | |
114 | */ | |
115 | int ms_uping(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
116 | { | |
117 | struct ConfItem *aconf; | |
118 | int port; | |
119 | int count; | |
120 | ||
121 | assert(0 != cptr); | |
122 | assert(0 != sptr); | |
123 | ||
124 | if (!IsAnOper(sptr)) { | |
125 | send_reply(sptr, ERR_NOPRIVILEGES); | |
126 | return 0; | |
127 | } | |
128 | ||
129 | if (parc < 5) { | |
130 | send_reply(sptr, ERR_NEEDMOREPARAMS, "UPING"); | |
131 | return 0; | |
132 | } | |
133 | ||
134 | if (hunt_server_cmd(sptr, CMD_UPING, cptr, 1, "%s %s %C %s", 3, parc, parv) | |
135 | != HUNTED_ISME) | |
136 | return 0; | |
137 | /* | |
138 | * Determine port: First user supplied, then default : 7007 | |
139 | */ | |
140 | if (EmptyString(parv[2]) || (port = atoi(parv[2])) <= 0) | |
141 | port = atoi(UDP_PORT); | |
142 | ||
143 | if (EmptyString(parv[4]) || (count = atoi(parv[4])) <= 0) | |
144 | { | |
145 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING : Illegal number of " | |
146 | "packets: %s", sptr, parv[4]); | |
147 | return 0; | |
148 | } | |
149 | /* | |
150 | * Check if a CONNECT would be possible at all (adapted from m_connect) | |
151 | */ | |
152 | if ((aconf = conf_find_server(parv[1]))) | |
153 | uping_server(sptr, aconf, port, count); | |
154 | else | |
155 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Host %s not listed in " | |
156 | "ircd.conf", sptr, parv[1]); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | /* | |
162 | * mo_uping - oper message handler | |
163 | * | |
164 | * m_uping -- by Run | |
165 | * | |
166 | * parv[0] = sender prefix | |
167 | * parv[1] = pinged server | |
168 | * parv[2] = port | |
169 | * parv[3] = hunted server | |
170 | * parv[4] = number of requested pings | |
171 | */ | |
172 | int mo_uping(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
173 | { | |
174 | struct ConfItem *aconf; | |
175 | int port; | |
176 | int count; | |
177 | ||
178 | assert(0 != cptr); | |
179 | assert(0 != sptr); | |
180 | assert(cptr == sptr); | |
181 | ||
182 | assert(IsAnOper(sptr)); | |
183 | ||
184 | if (parc < 2) { | |
185 | send_reply(sptr, ERR_NEEDMOREPARAMS, "UPING"); | |
186 | return 0; | |
187 | } | |
188 | ||
189 | if (parc == 2) { | |
190 | parv[parc++] = UDP_PORT; | |
191 | parv[parc++] = cli_name(&me); | |
192 | parv[parc++] = "5"; | |
193 | } | |
194 | else if (parc == 3) { | |
195 | if (IsDigit(*parv[2])) | |
196 | parv[parc++] = cli_name(&me); | |
197 | else { | |
198 | parv[parc++] = parv[2]; | |
199 | parv[2] = UDP_PORT; | |
200 | } | |
201 | parv[parc++] = "5"; | |
202 | } | |
203 | else if (parc == 4) { | |
204 | if (IsDigit(*parv[2])) { | |
205 | if (IsDigit(*parv[3])) { | |
206 | parv[parc++] = parv[3]; | |
207 | parv[3] = cli_name(&me); | |
208 | } | |
209 | else | |
210 | parv[parc++] = "5"; | |
211 | } | |
212 | else { | |
213 | parv[parc++] = parv[3]; | |
214 | parv[3] = parv[2]; | |
215 | parv[2] = UDP_PORT; | |
216 | } | |
217 | } | |
218 | if (hunt_server_cmd(sptr, CMD_UPING, sptr, 1, "%s %s %C %s", 3, parc, parv) | |
219 | != HUNTED_ISME) | |
220 | return 0; | |
221 | /* | |
222 | * Determine port: First user supplied, then default : 7007 | |
223 | */ | |
224 | if (EmptyString(parv[2]) || (port = atoi(parv[2])) <= 0) | |
225 | port = atoi(UDP_PORT); | |
226 | ||
227 | if (EmptyString(parv[4]) || (count = atoi(parv[4])) <= 0) | |
228 | { | |
229 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Illegal number of " | |
230 | "packets: %s", sptr, parv[4]); | |
231 | return 0; | |
232 | } | |
233 | /* | |
234 | * Check if a CONNECT would be possible at all (adapted from m_connect) | |
235 | */ | |
236 | if ((aconf = conf_find_server(parv[1]))) | |
237 | uping_server(sptr, aconf, port, count); | |
238 | else { | |
239 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :UPING: Host %s not listed in " | |
240 | "ircd.conf", sptr, parv[1]); | |
241 | } | |
242 | return 0; | |
243 | } |