1 /* © 2005-2007 Anselm R. Garbe <garbeam at gmail dot com>
2 * © 2005 Nico Golde <nico at ngolde dot de>
3 * See LICENSE file for license details. */
6 #include <netinet/in.h>
13 #include <sys/socket.h>
16 #define PINGTIMEOUT 300
19 static char *host = "irc.oftc.net";
20 static unsigned short port = 6667;
21 static char *password = NULL;
24 static char bufin[MAXMSG], bufout[MAXMSG];
25 static char channel[256];
27 static time_t trespond;
30 eprint(const char *errstr, ...) {
34 vfprintf(stderr, errstr, ap);
40 getline(int fd, unsigned int len, char *buf) {
45 if(read(fd, &c, sizeof(char)) != sizeof(char))
49 while(c != '\n' && i < len);
55 pout(char *channel, char *msg) {
56 static char timestr[18];
59 strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
60 fprintf(stdout, "%-12.12s: %s %s\n", channel, timestr, msg);
64 privmsg(char *channel, char *msg) {
67 snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg);
68 pout(channel, bufout);
69 snprintf(bufout, sizeof bufout, "PRIVMSG %s :%s\r\n", channel, msg);
70 write(srv, bufout, strlen(bufout));
80 privmsg(channel, msg);
83 if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
84 snprintf(bufout, sizeof bufout, "JOIN %s\r\n", msg + 3);
85 else if(!strncmp(msg + 1, "l ", 2))
86 snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3);
87 else if(!strncmp(msg + 1, "m ", 2)) {
88 if((p = strchr(msg + 3, ' ')))
93 else if(!strncmp(msg + 1, "s ", 2)) {
94 strncpy(channel, msg + 3, sizeof channel);
98 snprintf(bufout, sizeof bufout, "%s\r\n", msg + 1);
99 write(srv, bufout, strlen(bufout));
103 parsesrv(char *msg) {
104 char *chan, *cmd, *p, *txt, *usr;
113 if(!(p = strchr(msg, ' ')))
118 if((p = strchr(usr, '!')))
121 for(p = cmd; *p; p++) /* remove CRLFs */
122 if(*p == '\r' || *p == '\n')
124 if((p = strchr(cmd, ':'))) {
128 if(!strncmp("PONG", cmd, 4))
130 if(!strncmp("PRIVMSG", cmd, 7) && txt) {
131 if(!(p = strchr(cmd, ' ')))
135 for(; *p && *p != ' '; p++);
137 snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt);
140 else if(!strncmp("PING", cmd, 4) && txt) {
141 snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt);
142 write(srv, bufout, strlen(bufout));
145 snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt ? txt : "");
147 if(!strncmp("NICK", cmd, 4) && !strncmp(usr, nick, sizeof nick) && txt)
148 strncpy(nick, txt, sizeof nick);
153 main(int argc, char *argv[]) {
157 static struct sockaddr_in addr; /* initially filled with 0's */
161 strncpy(nick, getenv("USER"), sizeof nick);
162 for(i = 1; i < argc; i++)
163 if(!strncmp(argv[i], "-h", 3)) {
164 if(++i < argc) host = argv[i];
166 else if(!strncmp(argv[i], "-p", 3)) {
167 if(++i < argc) port = (unsigned short)atoi(argv[i]);
169 else if(!strncmp(argv[i], "-n", 3)) {
170 if(++i < argc) strncpy(nick, argv[i], sizeof nick);
172 else if(!strncmp(argv[i], "-k", 3)) {
173 if(++i < argc) password = argv[i];
175 else if(!strncmp(argv[i], "-v", 3))
176 eprint("sic-"VERSION", © 2005-2007 Anselm R. Garbe, Nico Golde\n");
178 eprint("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
181 if((srv = socket(AF_INET, SOCK_STREAM, 0)) < 0)
182 eprint("sic: cannot connect host '%s'\n", host);
183 if(NULL == (hp = gethostbyname(host)))
184 eprint("sic: cannot resolve hostname '%s'\n", host);
185 addr.sin_family = AF_INET;
186 addr.sin_port = htons(port);
187 memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
188 if(connect(srv, (struct sockaddr *) &addr, sizeof(struct sockaddr_in))) {
190 eprint("sic: cannot connect host '%s'\n", host);
194 snprintf(bufout, sizeof bufout,
195 "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
196 password, nick, nick, host, nick);
198 snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
199 nick, nick, host, nick);
200 write(srv, bufout, strlen(bufout));
201 snprintf(ping, sizeof ping, "PING %s\r\n", host);
203 setbuf(stdout, NULL); /* unbuffered stdout */
205 for(;;) { /* main loop */
211 i = select(srv + 1, &rd, 0, 0, &tv);
215 eprint("sic: error on select()");
218 if(time(NULL) - trespond >= PINGTIMEOUT)
219 eprint("sic shutting down: parse timeout");
220 write(srv, ping, strlen(ping));
223 if(FD_ISSET(srv, &rd)) {
224 if(getline(srv, sizeof bufin, bufin) == -1)
225 eprint("sic: remote host closed connection");
227 trespond = time(NULL);
229 if(FD_ISSET(0, &rd)) {
230 if(getline(0, sizeof bufin, bufin) == -1)
231 eprint("sic: broken pipe");