1 d23d2886 2023-07-30 op /* $Id: irc.c,v 1.2 2015/08/20 17:29:16 dhartmei Exp $ */
4 a29564dd 2023-08-20 op * Copyright (c) 2023 Omar Polo <op@openbsd.org>
5 d23d2886 2023-07-30 op * Copyright (c) 2003-2004 Daniel Hartmeier
6 d23d2886 2023-07-30 op * All rights reserved.
8 d23d2886 2023-07-30 op * Redistribution and use in source and binary forms, with or without
9 d23d2886 2023-07-30 op * modification, are permitted provided that the following conditions
12 d23d2886 2023-07-30 op * - Redistributions of source code must retain the above copyright
13 d23d2886 2023-07-30 op * notice, this list of conditions and the following disclaimer.
14 d23d2886 2023-07-30 op * - Redistributions in binary form must reproduce the above
15 d23d2886 2023-07-30 op * copyright notice, this list of conditions and the following
16 d23d2886 2023-07-30 op * disclaimer in the documentation and/or other materials provided
17 d23d2886 2023-07-30 op * with the distribution.
19 d23d2886 2023-07-30 op * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 d23d2886 2023-07-30 op * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 d23d2886 2023-07-30 op * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
22 d23d2886 2023-07-30 op * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
23 d23d2886 2023-07-30 op * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
24 d23d2886 2023-07-30 op * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
25 d23d2886 2023-07-30 op * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
26 d23d2886 2023-07-30 op * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
27 d23d2886 2023-07-30 op * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 d23d2886 2023-07-30 op * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
29 d23d2886 2023-07-30 op * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
30 d23d2886 2023-07-30 op * POSSIBILITY OF SUCH DAMAGE.
34 a3ace556 2023-08-01 op #include <err.h>
35 d23d2886 2023-07-30 op #include <stdarg.h>
36 d23d2886 2023-07-30 op #include <stdio.h>
37 d23d2886 2023-07-30 op #include <string.h>
39 d23d2886 2023-07-30 op #include "irc.h"
40 d23d2886 2023-07-30 op #include "icb.h"
42 d23d2886 2023-07-30 op extern void scan(const char **, char *, size_t, const char *,
43 d23d2886 2023-07-30 op const char *);
44 c8394ca1 2023-08-01 op extern void icbirc_quit(void);
45 d23d2886 2023-07-30 op extern int sync_write(int, const char *, int);
47 3c9ac033 2023-07-30 op static void irc_cmd(char *, int, int);
49 d23d2886 2023-07-30 op static void irc_send_pong(int, const char *);
51 d23d2886 2023-07-30 op char irc_pass[256];
52 d23d2886 2023-07-30 op char irc_ident[256];
53 d23d2886 2023-07-30 op char irc_nick[256];
54 d23d2886 2023-07-30 op char irc_channel[256];
55 d23d2886 2023-07-30 op int in_irc_channel;
58 d23d2886 2023-07-30 op * irc_recv() receives read(2) chunks and assembles complete lines, which are
59 d23d2886 2023-07-30 op * passed to irc_cmd(). Overlong lines are truncated after 65kB.
61 d23d2886 2023-07-30 op * XXX: argument checking is not as strong as for ICB (trusting the client)
66 d23d2886 2023-07-30 op irc_recv(const char *buf, unsigned len, int client_fd, int server_fd)
68 d23d2886 2023-07-30 op static char cmd[65535];
69 d23d2886 2023-07-30 op static unsigned off = 0;
71 d23d2886 2023-07-30 op while (len > 0) {
72 d23d2886 2023-07-30 op while (len > 0 && off < (sizeof(cmd) - 1) && *buf != '\n') {
73 d23d2886 2023-07-30 op cmd[off++] = *buf++;
76 d23d2886 2023-07-30 op if (off == (sizeof(cmd) - 1))
77 d23d2886 2023-07-30 op while (len > 0 && *buf != '\n') {
81 d23d2886 2023-07-30 op /* off <= sizeof(cmd) - 1 */
82 d23d2886 2023-07-30 op if (len > 0 && *buf == '\n') {
85 d23d2886 2023-07-30 op if (off > 0 && cmd[off - 1] == '\r')
86 d23d2886 2023-07-30 op cmd[off - 1] = 0;
89 d23d2886 2023-07-30 op irc_cmd(cmd, client_fd, server_fd);
96 3c9ac033 2023-07-30 op irc_cmd(char *cmd, int client_fd, int server_fd)
98 3c9ac033 2023-07-30 op if (!strncasecmp(cmd, "RAWICB ", 7)) {
99 3c9ac033 2023-07-30 op icb_send_raw(server_fd, cmd + 7);
103 3c9ac033 2023-07-30 op char *argv[10], *p;
104 3c9ac033 2023-07-30 op int argc = 1;
106 3c9ac033 2023-07-30 op for (p = cmd, argv[0] = p; argc < 10 && (p = strchr(p, ' ')) != NULL;
110 3c9ac033 2023-07-30 op while (*p == ' ')
112 3c9ac033 2023-07-30 op if (*p == ':') {
113 3c9ac033 2023-07-30 op argv[argc] = p + 1;
117 3c9ac033 2023-07-30 op argv[argc] = p;
120 3c9ac033 2023-07-30 op if (!strcasecmp(argv[0], "PASS")) {
121 3c9ac033 2023-07-30 op strlcpy(irc_pass, argv[1], sizeof(irc_pass));
122 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "USER")) {
123 3c9ac033 2023-07-30 op strlcpy(irc_ident, argv[1], sizeof(irc_ident));
124 d23d2886 2023-07-30 op if (!icb_logged_in && irc_nick[0] && irc_ident[0])
125 d23d2886 2023-07-30 op icb_send_login(server_fd, irc_nick,
126 d23d2886 2023-07-30 op irc_ident, irc_pass);
127 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "NICK")) {
128 3c9ac033 2023-07-30 op strlcpy(irc_nick, argv[1], sizeof(irc_nick));
129 d23d2886 2023-07-30 op if (icb_logged_in)
130 d23d2886 2023-07-30 op icb_send_name(server_fd, irc_nick);
131 d23d2886 2023-07-30 op else if (irc_nick[0] && irc_ident[0])
132 d23d2886 2023-07-30 op icb_send_login(server_fd, irc_nick,
133 d23d2886 2023-07-30 op irc_ident, irc_pass);
134 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "JOIN")) {
135 3c9ac033 2023-07-30 op icb_send_group(server_fd,
136 3c9ac033 2023-07-30 op argv[1] + (argv[1][0] == '#' ? 1 : 0));
137 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "PART")) {
138 d23d2886 2023-07-30 op in_irc_channel = 0;
139 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "PRIVMSG") ||
140 3c9ac033 2023-07-30 op !strcasecmp(argv[0], "NOTICE")) {
141 d23d2886 2023-07-30 op char msg[8192];
142 d23d2886 2023-07-30 op unsigned i, j;
144 3c9ac033 2023-07-30 op strlcpy(msg, argv[2], sizeof(msg));
145 d23d2886 2023-07-30 op /* strip \001 found in CTCP messages */
147 d23d2886 2023-07-30 op while (msg[i]) {
148 d23d2886 2023-07-30 op if (msg[i] == '\001') {
149 d23d2886 2023-07-30 op for (j = i; msg[j + 1]; ++j)
150 d23d2886 2023-07-30 op msg[j] = msg[j + 1];
155 3c9ac033 2023-07-30 op if (!strcmp(argv[1], irc_channel))
156 3c9ac033 2023-07-30 op icb_send_openmsg(server_fd, msg);
158 3c9ac033 2023-07-30 op icb_send_privmsg(server_fd, argv[1], msg);
159 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "MODE")) {
160 3c9ac033 2023-07-30 op if (strcmp(argv[1], irc_channel))
162 3c9ac033 2023-07-30 op if (argc == 2)
163 3c9ac033 2023-07-30 op icb_send_names(server_fd, irc_channel);
165 3c9ac033 2023-07-30 op if (strcmp(argv[2], "+o")) {
166 ed972677 2023-08-01 op warnx("irc_cmd: invalid MODE args '%s'",
170 3c9ac033 2023-07-30 op icb_send_pass(server_fd, argv[3]);
172 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "TOPIC")) {
173 3c9ac033 2023-07-30 op if (strcmp(argv[1], irc_channel)) {
174 ed972677 2023-08-01 op warnx("irc_cmd: invalid TOPIC channel '%s'",
178 3c9ac033 2023-07-30 op icb_send_topic(server_fd, argv[2]);
179 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "LIST")) {
180 d23d2886 2023-07-30 op icb_send_list(server_fd);
181 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "NAMES")) {
182 3c9ac033 2023-07-30 op icb_send_names(server_fd, argv[1]);
183 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "WHOIS")) {
184 3c9ac033 2023-07-30 op icb_send_whois(server_fd, argv[1]);
185 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "WHO")) {
186 3c9ac033 2023-07-30 op icb_send_who(server_fd, argv[1]);
187 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "KICK")) {
188 3c9ac033 2023-07-30 op if (strcmp(argv[1], irc_channel)) {
189 ed972677 2023-08-01 op warnx("irc_cmd: invalid KICK args '%s'", argv[1]);
192 3c9ac033 2023-07-30 op icb_send_boot(server_fd, argv[2]);
193 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "PING")) {
194 d23d2886 2023-07-30 op icb_send_noop(server_fd);
195 3c9ac033 2023-07-30 op irc_send_pong(client_fd, argv[1]);
196 3c9ac033 2023-07-30 op } else if (!strcasecmp(argv[0], "QUIT")) {
197 ed972677 2023-08-01 op warnx("client QUIT");
198 c8394ca1 2023-08-01 op icbirc_quit();
199 a224c741 2023-08-20 op } else if (!strcasecmp(argv[0], "CAP")) {
200 a224c741 2023-08-20 op if (!strcasecmp(argv[1], "LS")) {
201 a224c741 2023-08-20 op printf("CAP * LS\n");
202 a224c741 2023-08-20 op fflush(stdout);
203 a224c741 2023-08-20 op } else if (!strcasecmp(argv[1], "REQ")) {
204 a224c741 2023-08-20 op printf("CAP * NAK :%s\n", argv[2]);
205 a224c741 2023-08-20 op fflush(stdout);
206 a224c741 2023-08-20 op } else if (!strcasecmp(argv[1], "END"))
209 a224c741 2023-08-20 op warnx("irc_cmd: unknown command 'CAP %s'", argv[1]);
211 ed972677 2023-08-01 op warnx("irc_cmd: unknown command '%s'", argv[0]);
215 d23d2886 2023-07-30 op irc_send_notice(int fd, const char *format, ...)
217 d23d2886 2023-07-30 op char cmd[8192], msg[8192];
220 d23d2886 2023-07-30 op va_start(ap, format);
221 d23d2886 2023-07-30 op vsnprintf(msg, sizeof(msg), format, ap);
223 d23d2886 2023-07-30 op snprintf(cmd, sizeof(cmd), "NOTICE %s\r\n", msg);
224 d23d2886 2023-07-30 op sync_write(fd, cmd, strlen(cmd));
228 d23d2886 2023-07-30 op irc_send_code(int fd, const char *from, const char *nick, const char *code,
229 d23d2886 2023-07-30 op const char *format, ...)
231 d23d2886 2023-07-30 op char cmd[8192], msg[8192];
234 d23d2886 2023-07-30 op va_start(ap, format);
235 d23d2886 2023-07-30 op vsnprintf(msg, sizeof(msg), format, ap);
237 d23d2886 2023-07-30 op snprintf(cmd, sizeof(cmd), ":%s %s %s :%s\r\n", from, code, nick, msg);
238 d23d2886 2023-07-30 op sync_write(fd, cmd, strlen(cmd));
242 d23d2886 2023-07-30 op irc_send_msg(int fd, const char *src, const char *dst, const char *msg)
244 d23d2886 2023-07-30 op char cmd[8192];
246 d23d2886 2023-07-30 op snprintf(cmd, sizeof(cmd), ":%s PRIVMSG %s :%s\r\n", src, dst, msg);
247 d23d2886 2023-07-30 op sync_write(fd, cmd, strlen(cmd));
251 d23d2886 2023-07-30 op irc_send_join(int fd, const char *src, const char *dst)
253 d23d2886 2023-07-30 op char cmd[8192];
255 d23d2886 2023-07-30 op snprintf(cmd, sizeof(cmd), ":%s JOIN :%s\r\n", src, dst);
256 d23d2886 2023-07-30 op sync_write(fd, cmd, strlen(cmd));
257 d23d2886 2023-07-30 op in_irc_channel = 1;
261 d23d2886 2023-07-30 op irc_send_part(int fd, const char *src, const char *dst)
263 d23d2886 2023-07-30 op char cmd[8192];
265 d23d2886 2023-07-30 op snprintf(cmd, sizeof(cmd), ":%s PART :%s\r\n", src, dst);
266 d23d2886 2023-07-30 op sync_write(fd, cmd, strlen(cmd));
270 d23d2886 2023-07-30 op irc_send_pong(int fd, const char *daemon)
272 d23d2886 2023-07-30 op char cmd[8192];
274 d23d2886 2023-07-30 op snprintf(cmd, sizeof(cmd), "PONG %s\r\n", daemon);
275 d23d2886 2023-07-30 op sync_write(fd, cmd, strlen(cmd));
