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189935b1 | 1 | /* |
2 | * IRC - Internet Relay Chat, ircd/m_away.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_away.c,v 1.13 2004/12/11 05:13:46 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_alloc.h" | |
87 | #include "ircd_log.h" | |
88 | #include "ircd_reply.h" | |
89 | #include "ircd_string.h" | |
90 | #include "msg.h" | |
91 | #include "numeric.h" | |
92 | #include "numnicks.h" | |
93 | #include "s_user.h" | |
94 | #include "send.h" | |
95 | ||
96 | /* #include <assert.h> -- Now using assert in ircd_log.h */ | |
97 | #include <string.h> | |
98 | ||
99 | /* | |
100 | * user_set_away - set user away state | |
101 | * returns 1 if client is away or changed away message, 0 if | |
102 | * client is removing away status. | |
103 | * NOTE: this function may modify user and message, so they | |
104 | * must be mutable. | |
105 | */ | |
106 | static int user_set_away(struct User* user, char* message) | |
107 | { | |
108 | char* away; | |
109 | assert(0 != user); | |
110 | ||
111 | away = user->away; | |
112 | ||
113 | if (EmptyString(message)) { | |
114 | /* | |
115 | * Marking as not away | |
116 | */ | |
117 | if (away) { | |
118 | MyFree(away); | |
119 | user->away = 0; | |
120 | } | |
121 | } | |
122 | else { | |
123 | /* | |
124 | * Marking as away | |
125 | */ | |
126 | unsigned int len = strlen(message); | |
127 | ||
128 | if (len > AWAYLEN) { | |
129 | message[AWAYLEN] = '\0'; | |
130 | len = AWAYLEN; | |
131 | } | |
132 | if (away) | |
133 | MyFree(away); | |
134 | away = (char*) MyMalloc(len + 1); | |
135 | assert(0 != away); | |
136 | ||
137 | user->away = away; | |
138 | strcpy(away, message); | |
139 | } | |
140 | return (user->away != 0); | |
141 | } | |
142 | ||
143 | ||
144 | /* | |
145 | * m_away - generic message handler | |
146 | * - Added 14 Dec 1988 by jto. | |
147 | * | |
148 | * parv[0] = sender prefix | |
149 | * parv[1] = away message | |
150 | * | |
151 | * TODO: Throttle aways - many people have a script which resets the away | |
152 | * message every 10 seconds which really chews the bandwidth. | |
153 | */ | |
154 | int m_away(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
155 | { | |
156 | char* away_message = parv[1]; | |
157 | int was_away = cli_user(sptr)->away != 0; | |
158 | ||
159 | assert(0 != cptr); | |
160 | assert(cptr == sptr); | |
161 | ||
162 | if (user_set_away(cli_user(sptr), away_message)) | |
163 | { | |
164 | if (!was_away) | |
165 | sendcmdto_serv_butone(sptr, CMD_AWAY, cptr, ":%s", away_message); | |
166 | send_reply(sptr, RPL_NOWAWAY); | |
167 | } | |
168 | else { | |
169 | sendcmdto_serv_butone(sptr, CMD_AWAY, cptr, ""); | |
170 | send_reply(sptr, RPL_UNAWAY); | |
171 | } | |
172 | return 0; | |
173 | } | |
174 | ||
175 | /* | |
176 | * ms_away - server message handler | |
177 | * - Added 14 Dec 1988 by jto. | |
178 | * | |
179 | * parv[0] = sender prefix | |
180 | * parv[1] = away message | |
181 | */ | |
182 | int ms_away(struct Client* cptr, struct Client* sptr, int parc, char* parv[]) | |
183 | { | |
184 | char* away_message = parv[1]; | |
185 | ||
186 | assert(0 != cptr); | |
187 | assert(0 != sptr); | |
188 | /* | |
189 | * servers can't set away | |
190 | */ | |
191 | if (IsServer(sptr)) | |
192 | return protocol_violation(sptr,"Server trying to set itself away"); | |
193 | ||
194 | if (user_set_away(cli_user(sptr), away_message)) | |
195 | sendcmdto_serv_butone(sptr, CMD_AWAY, cptr, ":%s", away_message); | |
196 | else | |
197 | sendcmdto_serv_butone(sptr, CMD_AWAY, cptr, ""); | |
198 | return 0; | |
199 | } | |
200 | ||
201 |