1 /* (C)opyright MMV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
2 * (C)opyright MMV-MMVI Nico Golde <nico at ngolde dot de>
3 * See LICENSE file for license details.
7 #include <netinet/in.h>
13 #include <sys/socket.h>
16 #define PINGTIMEOUT 300
19 enum { Tnick, Tuser, Tcmd, Tchan, Targ, Ttext, Tlast };
21 static char *server = "irc.oftc.net";
22 static unsigned short port = 6667;
23 static char *nick = NULL;
24 static char *fullname = NULL;
25 static char *password = NULL;
27 static char bufin[MAXMSG], bufout[MAXMSG];
28 static char channel[256];
30 static time_t trespond;
33 getline(int fd, unsigned int len, char *buf) {
38 if(read(fd, &c, sizeof(char)) != sizeof(char))
42 while(c != '\n' && i < len);
48 pout(char *channel, char *msg) {
49 static char timestr[18];
52 strftime(timestr, sizeof timestr, "%F %R", localtime(&t));
53 fprintf(stdout, "%-8.8s: %s %s\n", channel, timestr, msg);
57 privmsg(char *channel, char *msg) {
58 snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg);
59 pout(channel, bufout);
60 snprintf(bufout, sizeof bufout, "PRIVMSG %s :%s\r\n", channel, msg);
61 write(srv, bufout, strlen(bufout));
71 privmsg(channel, msg);
74 if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
75 snprintf(bufout, sizeof bufout, "JOIN %s\r\n", &msg[3]);
76 else if(!strncmp(msg + 1, "l ", 2))
77 snprintf(bufout, sizeof bufout, "PART %s :sic\r\n", &msg[3]);
78 else if(!strncmp(msg + 1, "m ", 2)) {
79 if((p = strchr(&msg[3], ' ')))
84 else if(!strncmp(msg + 1, "s ", 2)) {
85 strncpy(channel, &msg[3], sizeof channel);
88 else if(!strncmp(msg + 1, "t ", 2)) {
89 if((p = strchr(&msg[3], ' ')))
91 snprintf(bufout, sizeof bufout, "TOPIC %s :%s\r\n", &msg[3], p);
94 snprintf(bufout, sizeof bufout, "%s\r\n", &msg[1]);
95 write(srv, bufout, strlen(bufout));
99 tokenize(char **result, unsigned int reslen, char *str, char delim) {
105 for(n = str; *n == delim; n++);
107 for(i = 0; *n != 0;) {
118 if((i < reslen) && (p < n) && strlen(p))
120 return i; /* number of tokens */
124 parsesrv(char *msg) {
125 char *argv[Tlast], *cmd, *p;
131 for(i = 0; i < Tlast; i++)
134 /* <bufout> ::= [':' <prefix> <SPACE> ] <command> <params> <crlf>
135 * <prefix> ::= <servername> | <nick> [ '!' <user> ] [ '@' <server> ]
136 * <command> ::= <letter> { <letter> } | <number> <number> <number>
137 * <SPACE> ::= ' ' { ' ' }
138 * <params> ::= <SPACE> [ ':' <trailing> | <middle> <params> ]
139 * <middle> ::= <Any *non-empty* sequence of octets not including SPACE
140 * or NUL or CR or LF, the first of which may not be ':'>
141 * <trailing> ::= <Any, possibly *empty*, sequence of octets not including NUL or CR or LF>
144 if(msg[0] == ':') { /* check prefix */
145 if (!(p = strchr(msg, ' ')))
148 for(++p; *p == ' '; p++);
150 argv[Tnick] = &msg[1];
151 if((p = strchr(msg, '!'))) {
158 for(p = cmd; p && *p != 0; p++)
159 if(*p == '\r' || *p == '\n')
161 if((p = strchr(cmd, ':'))) {
165 tokenize(&argv[Tcmd], Tlast - Tcmd, cmd, ' ');
166 if(!argv[Tcmd] || !strncmp("PONG", argv[Tcmd], 5))
168 else if(!strncmp("PING", argv[Tcmd], 5)) {
169 snprintf(bufout, sizeof bufout, "PONG %s\r\n", argv[Ttext]);
170 write(srv, bufout, strlen(bufout));
173 else if(!argv[Tnick] || !argv[Tuser]) { /* server command */
174 snprintf(bufout, sizeof bufout, "%s", argv[Ttext] ? argv[Ttext] : "");
175 pout(server, bufout);
178 else if(!strncmp("ERROR", argv[Tcmd], 6))
179 snprintf(bufout, sizeof bufout, "-!- error %s",
180 argv[Ttext] ? argv[Ttext] : "unknown");
181 else if(!strncmp("JOIN", argv[Tcmd], 5)) {
182 if(argv[Ttext]!=NULL){
183 p = strchr(argv[Ttext], ' ');
187 argv[Tchan] = argv[Ttext];
188 snprintf(bufout, sizeof bufout, "-!- %s(%s) has joined %s",
189 argv[Tnick], argv[Tuser], argv[Ttext]);
191 else if(!strncmp("PART", argv[Tcmd], 5)) {
192 snprintf(bufout, sizeof bufout, "-!- %s(%s) has left %s",
193 argv[Tnick], argv[Tuser], argv[Tchan]);
195 else if(!strncmp("MODE", argv[Tcmd], 5))
196 snprintf(bufout, sizeof bufout, "-!- %s changed mode/%s -> %s %s",
197 argv[Tnick], argv[Tcmd + 1],
198 argv[Tcmd + 2], argv[Tcmd + 3]);
199 else if(!strncmp("QUIT", argv[Tcmd], 5))
200 snprintf(bufout, sizeof bufout, "-!- %s(%s) has quit \"%s\"",
201 argv[Tnick], argv[Tuser],
202 argv[Ttext] ? argv[Ttext] : "");
203 else if(!strncmp("NICK", argv[Tcmd], 5))
204 snprintf(bufout, sizeof bufout, "-!- %s changed nick to %s",
205 argv[Tnick], argv[Ttext]);
206 else if(!strncmp("TOPIC", argv[Tcmd], 6))
207 snprintf(bufout, sizeof bufout, "-!- %s changed topic to \"%s\"",
208 argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
209 else if(!strncmp("KICK", argv[Tcmd], 5))
210 snprintf(bufout, sizeof bufout, "-!- %s kicked %s (\"%s\")",
211 argv[Tnick], argv[Targ],
212 argv[Ttext] ? argv[Ttext] : "");
213 else if(!strncmp("NOTICE", argv[Tcmd], 7))
214 snprintf(bufout, sizeof bufout, "-!- \"%s\")",
215 argv[Ttext] ? argv[Ttext] : "");
216 else if(!strncmp("PRIVMSG", argv[Tcmd], 8))
217 snprintf(bufout, sizeof bufout, "<%s> %s",
218 argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
219 if(!argv[Tchan] || !strncmp(argv[Tchan], nick, strlen(nick)))
220 pout(argv[Tnick], bufout);
222 pout(argv[Tchan], bufout);
226 main(int argc, char *argv[]) {
230 static struct sockaddr_in addr; /* initially filled with 0's */
234 nick = fullname = getenv("USER");
235 for(i = 1; i < argc; i++)
236 if(!strncmp(argv[i], "-s", 3)) {
237 if(++i < argc) server = argv[i];
239 else if(!strncmp(argv[i], "-p", 3)) {
240 if(++i < argc) port = (unsigned short)atoi(argv[i]);
242 else if(!strncmp(argv[i], "-n", 3)) {
243 if(++i < argc) nick = argv[i];
245 else if(!strncmp(argv[i], "-k", 3)) {
246 if(++i < argc) password = argv[i];
248 else if(!strncmp(argv[i], "-f", 3)) {
249 if(++i < argc) fullname = argv[i];
251 else if(!strncmp(argv[i], "-v", 3)) {
252 fputs("sic-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
256 fputs("usage: sic [-s server] [-p port] [-n nick]"
257 " [-k keyword] [-f fullname] [-v]\n", stderr);
262 if((srv = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
263 fprintf(stderr, "sic: cannot connect server '%s'\n", server);
266 if (NULL == (hp = gethostbyname(server))) {
267 fprintf(stderr, "sic: cannot resolve hostname '%s'\n", server);
270 addr.sin_family = AF_INET;
271 addr.sin_port = htons(port);
272 memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
273 if(connect(srv, (struct sockaddr *) &addr, sizeof(struct sockaddr_in))) {
275 fprintf(stderr, "sic: cannot connect server '%s'\n", server);
280 snprintf(bufout, sizeof bufout,
281 "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
282 password, nick, nick, server, fullname);
284 snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
285 nick, nick, server, fullname);
286 write(srv, bufout, strlen(bufout));
287 snprintf(ping, sizeof ping, "PING %s\r\n", server);
289 setbuf(stdout, NULL); /* unbuffered stdout */
291 for(;;) { /* main loop */
297 i = select(srv + 1, &rd, 0, 0, &tv);
301 perror("sic: error on select()");
304 if(time(NULL) - trespond >= PINGTIMEOUT) {
305 pout(server, "-!- sic shutting down: parse timeout");
308 write(srv, ping, strlen(ping));
311 if(FD_ISSET(srv, &rd)) {
312 if(getline(srv, sizeof bufin, bufin) == -1) {
313 perror("sic: remote server closed connection");
317 trespond = time(NULL);
319 if(FD_ISSET(0, &rd)) {
320 if(getline(0, sizeof bufin, bufin) == -1) {
321 perror("sic: broken pipe");