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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_links.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_links.c,v 1.12 2004/12/11 05:13:47 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 "ircd.h" | |
86 | #include "ircd_defs.h" | |
87 | #include "ircd_features.h" | |
88 | #include "ircd_log.h" | |
89 | #include "ircd_reply.h" | |
90 | #include "ircd_string.h" | |
91 | #include "match.h" | |
92 | #include "msg.h" | |
93 | #include "numeric.h" | |
94 | #include "numnicks.h" | |
95 | #include "s_user.h" | |
96 | #include "send.h" | |
97 | #include "struct.h" | |
98 | ||
99 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
100 | ||
101 | /* | |
102 | * m_links - generic message handler | |
103 | * | |
104 | * parv[0] = sender prefix | |
105 | * parv[1] = servername mask | |
106 | * | |
107 | * or | |
108 | * | |
109 | * parv[0] = sender prefix | |
110 | * parv[1] = server to query | |
111 | * parv[2] = servername mask | |
112 | */ | |
113 | int m_links(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
114 | { | |
115 | char *mask; | |
116 | struct Client *acptr; | |
117 | ||
118 | if (feature_bool(FEAT_HIS_LINKS) && !IsAnOper(sptr)) | |
119 | { | |
120 | send_reply(sptr, RPL_ENDOFLINKS, parc < 2 ? "*" : parv[1]); | |
121 | sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :%s %s", sptr, | |
122 | "/LINKS has been disabled, from CFV-165. Visit ", | |
123 | feature_str(FEAT_HIS_URLSERVERS)); | |
124 | return 0; | |
125 | } | |
126 | ||
127 | if (parc > 2) | |
128 | { | |
129 | if (hunt_server_cmd(sptr, CMD_LINKS, cptr, 1, "%C :%s", 1, parc, parv) != | |
130 | HUNTED_ISME) | |
131 | return 0; | |
132 | mask = parv[2]; | |
133 | } | |
134 | else | |
135 | mask = parc < 2 ? 0 : parv[1]; | |
136 | ||
137 | for (acptr = GlobalClientList, collapse(mask); acptr; acptr = cli_next(acptr)) | |
138 | { | |
139 | if (!IsServer(acptr) && !IsMe(acptr)) | |
140 | continue; | |
141 | if (!BadPtr(mask) && match(mask, cli_name(acptr))) | |
142 | continue; | |
143 | send_reply(sptr, RPL_LINKS, cli_name(acptr), cli_name(cli_serv(acptr)->up), | |
144 | cli_hopcount(acptr), cli_serv(acptr)->prot, | |
145 | ((cli_info(acptr))[0] ? cli_info(acptr) : "(Unknown Location)")); | |
146 | } | |
147 | ||
148 | send_reply(sptr, RPL_ENDOFLINKS, BadPtr(mask) ? "*" : mask); | |
149 | ||
150 | return 0; | |
151 | } | |
152 | ||
153 | /* | |
154 | * ms_links - server message handler | |
155 | * | |
156 | * parv[0] = sender prefix | |
157 | * parv[1] = servername mask | |
158 | * | |
159 | * or | |
160 | * | |
161 | * parv[0] = sender prefix | |
162 | * parv[1] = server to query | |
163 | * parv[2] = servername mask | |
164 | */ | |
165 | int | |
166 | ms_links(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
167 | { | |
168 | char *mask; | |
169 | struct Client *acptr; | |
170 | ||
171 | if (parc > 2) | |
172 | { | |
173 | if (hunt_server_cmd(sptr, CMD_LINKS, cptr, 1, "%C :%s", 1, parc, parv) != | |
174 | HUNTED_ISME) | |
175 | return 0; | |
176 | mask = parv[2]; | |
177 | } | |
178 | else | |
179 | mask = parc < 2 ? 0 : parv[1]; | |
180 | ||
181 | for (acptr = GlobalClientList, collapse(mask); acptr; acptr = cli_next(acptr)) | |
182 | { | |
183 | if (!IsServer(acptr) && !IsMe(acptr)) | |
184 | continue; | |
185 | if (!BadPtr(mask) && match(mask, cli_name(acptr))) | |
186 | continue; | |
187 | send_reply(sptr, RPL_LINKS, cli_name(acptr), cli_name(cli_serv(acptr)->up), | |
188 | cli_hopcount(acptr), cli_serv(acptr)->prot, | |
189 | ((cli_info(acptr))[0] ? cli_info(acptr) : "(Unknown Location)")); | |
190 | } | |
191 | ||
192 | send_reply(sptr, RPL_ENDOFLINKS, BadPtr(mask) ? "*" : mask); | |
193 | return 0; | |
194 | } |