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>
14 #include <sys/socket.h>
17 #define PINGTIMEOUT 300
20 static char *host = "irc.oftc.net";
21 static unsigned short port = 6667;
22 static char *password = NULL;
25 static char bufin[MAXMSG], bufout[MAXMSG];
26 static char channel[256];
28 static time_t trespond;
31 eprint(const char *errstr, ...) {
35 vfprintf(stderr, errstr, ap);
41 getline(int fd, unsigned int len, char *buf) {
46 if(read(fd, &c, sizeof(char)) != sizeof(char))
50 while(c != '\n' && i < len);
56 pout(char *channel, char *msg) {
57 static char timestr[18];
60 strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
61 fprintf(stdout, "%-12.12s: %s %s\n", channel, timestr, msg);
65 privmsg(char *channel, char *msg) {
68 snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg);
69 pout(channel, bufout);
70 snprintf(bufout, sizeof bufout, "PRIVMSG %s :%s\r\n", channel, msg);
71 write(srv, bufout, strlen(bufout));
81 privmsg(channel, msg);
84 if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
85 snprintf(bufout, sizeof bufout, "JOIN %s\r\n", msg + 3);
86 else if(!strncmp(msg + 1, "l ", 2))
87 snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3);
88 else if(!strncmp(msg + 1, "m ", 2)) {
89 if((p = strchr(msg + 3, ' ')))
94 else if(!strncmp(msg + 1, "s ", 2)) {
95 strncpy(channel, msg + 3, sizeof channel);
98 else if(!strncmp(msg + 1, "t ", 2)) {
99 if((p = strchr(msg + 3, ' ')))
101 snprintf(bufout, sizeof bufout, "TOPIC %s :%s\r\n", msg + 3, p);
104 snprintf(bufout, sizeof bufout, "%s\r\n", msg + 1);
105 write(srv, bufout, strlen(bufout));
109 parsesrv(char *msg) {
110 char *chan, *cmd, *p, *txt, *usr;
119 if(!(p = strchr(msg, ' ')))
124 if((p = strchr(usr, '!')))
127 for(p = cmd; *p; p++) /* remove CRLFs */
128 if(*p == '\r' || *p == '\n')
130 if((p = strchr(cmd, ':'))) {
134 if(!strncmp("PONG", cmd, 4))
136 if(!strncmp("PRIVMSG", cmd, 7) && txt) {
137 if(!(p = strchr(cmd, ' ')))
141 for(; *p && *p != ' '; p++);
143 snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt);
146 else if(!strncmp("PING", cmd, 4) && txt) {
147 snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt);
148 write(srv, bufout, strlen(bufout));
151 snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt ? txt : "");
153 if(!strncmp("NICK", cmd, 4) && !strncmp(usr, nick, sizeof nick) && txt)
154 strncpy(nick, txt, sizeof nick);
159 main(int argc, char *argv[]) {
163 static struct sockaddr_in addr; /* initially filled with 0's */
167 strncpy(nick, getenv("USER"), sizeof nick);
168 for(i = 1; i < argc; i++)
169 if(!strncmp(argv[i], "-h", 3)) {
170 if(++i < argc) host = argv[i];
172 else if(!strncmp(argv[i], "-p", 3)) {
173 if(++i < argc) port = (unsigned short)atoi(argv[i]);
175 else if(!strncmp(argv[i], "-n", 3)) {
176 if(++i < argc) strncpy(nick, argv[i], sizeof nick);
178 else if(!strncmp(argv[i], "-k", 3)) {
179 if(++i < argc) password = argv[i];
181 else if(!strncmp(argv[i], "-v", 3))
182 eprint("sic-"VERSION", (C)opyright MMVI Anselm R. Garbe\n");
184 eprint("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
187 if((srv = socket(AF_INET, SOCK_STREAM, 0)) < 0)
188 eprint("sic: cannot connect host '%s'\n", host);
189 if(NULL == (hp = gethostbyname(host)))
190 eprint("sic: cannot resolve hostname '%s'\n", host);
191 addr.sin_family = AF_INET;
192 addr.sin_port = htons(port);
193 memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
194 if(connect(srv, (struct sockaddr *) &addr, sizeof(struct sockaddr_in))) {
196 eprint("sic: cannot connect host '%s'\n", host);
200 snprintf(bufout, sizeof bufout,
201 "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
202 password, nick, nick, host, nick);
204 snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
205 nick, nick, host, nick);
206 write(srv, bufout, strlen(bufout));
207 snprintf(ping, sizeof ping, "PING %s\r\n", host);
209 setbuf(stdout, NULL); /* unbuffered stdout */
211 for(;;) { /* main loop */
217 i = select(srv + 1, &rd, 0, 0, &tv);
221 eprint("sic: error on select()");
224 if(time(NULL) - trespond >= PINGTIMEOUT)
225 eprint("sic shutting down: parse timeout");
226 write(srv, ping, strlen(ping));
229 if(FD_ISSET(srv, &rd)) {
230 if(getline(srv, sizeof bufin, bufin) == -1)
231 eprint("sic: remote host closed connection");
233 trespond = time(NULL);
235 if(FD_ISSET(0, &rd)) {
236 if(getline(0, sizeof bufin, bufin) == -1)
237 eprint("sic: broken pipe");