1 /* © 2005-2008 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 void die(const char *errstr, ...);
20 static void printl(char *channel, char *msg);
21 static void privmsg(char *channel, char *msg);
22 static void parsein(char *msg);
23 static void parsesrv(char *msg);
24 static int readl(int fd, unsigned int len, char *buf);
26 static char *host = "irc.oftc.net";
27 static unsigned short port = 6667;
28 static char *password = NULL;
31 static char bufin[MAXMSG], bufout[MAXMSG];
32 static char channel[256];
34 static time_t trespond;
37 die(const char *errstr, ...) {
41 vfprintf(stderr, errstr, ap);
47 printl(char *channel, char *msg) {
48 static char timestr[18];
51 strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
52 fprintf(stdout, "%-12.12s: %s %s\n", channel, timestr, msg);
56 privmsg(char *channel, char *msg) {
59 snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg);
60 printl(channel, bufout);
61 snprintf(bufout, sizeof bufout, "PRIVMSG %s :%s\r\n", channel, msg);
62 write(srv, bufout, strlen(bufout));
72 privmsg(channel, msg);
75 if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
76 snprintf(bufout, sizeof bufout, "JOIN %s\r\n", msg + 3);
77 else if(!strncmp(msg + 1, "l ", 2))
78 snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3);
79 else if(!strncmp(msg + 1, "m ", 2)) {
80 if((p = strchr(msg + 3, ' ')))
85 else if(!strncmp(msg + 1, "s ", 2)) {
86 strncpy(channel, msg + 3, sizeof channel);
90 snprintf(bufout, sizeof bufout, "%s\r\n", msg + 1);
91 write(srv, bufout, strlen(bufout));
96 char *chan, *cmd, *p, *txt, *usr;
105 if(!(p = strchr(msg, ' ')))
110 if((p = strchr(usr, '!')))
113 for(p = cmd; *p; p++) /* remove CRLFs */
114 if(*p == '\r' || *p == '\n')
116 if((p = strchr(cmd, ':'))) {
120 if(!strncmp("PONG", cmd, 4))
122 if(!strncmp("PRIVMSG", cmd, 7) && txt) {
123 if(!(p = strchr(cmd, ' ')))
127 for(; *p && *p != ' '; p++);
129 snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt);
130 printl(chan, bufout);
132 else if(!strncmp("PING", cmd, 4) && txt) {
133 snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt);
134 write(srv, bufout, strlen(bufout));
137 snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt ? txt : "");
139 if(!strncmp("NICK", cmd, 4) && !strncmp(usr, nick, sizeof nick) && txt)
140 strncpy(nick, txt, sizeof nick);
145 readl(int fd, unsigned int len, char *buf) {
150 if(read(fd, &c, sizeof(char)) != sizeof(char))
154 while(c != '\n' && i < len);
161 main(int argc, char *argv[]) {
165 static struct sockaddr_in addr; /* initially filled with 0's */
169 strncpy(nick, getenv("USER"), sizeof nick);
170 for(i = 1; i < argc; i++)
171 if(!strncmp(argv[i], "-h", 3)) {
172 if(++i < argc) host = argv[i];
174 else if(!strncmp(argv[i], "-p", 3)) {
175 if(++i < argc) port = (unsigned short)atoi(argv[i]);
177 else if(!strncmp(argv[i], "-n", 3)) {
178 if(++i < argc) strncpy(nick, argv[i], sizeof nick);
180 else if(!strncmp(argv[i], "-k", 3)) {
181 if(++i < argc) password = argv[i];
183 else if(!strncmp(argv[i], "-v", 3))
184 die("sic-"VERSION", © 2005-2008 Anselm R Garbe, Nico Golde\n");
186 die("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
189 if((srv = socket(AF_INET, SOCK_STREAM, 0)) < 0)
190 die("error: cannot connect host '%s'\n", host);
191 if(NULL == (hp = gethostbyname(host)))
192 die("error: cannot resolve hostname '%s'\n", host);
193 addr.sin_family = AF_INET;
194 addr.sin_port = htons(port);
195 memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
196 if(connect(srv, (struct sockaddr *) &addr, sizeof(struct sockaddr_in))) {
198 die("error: cannot connect host '%s'\n", host);
202 snprintf(bufout, sizeof bufout,
203 "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
204 password, nick, nick, host, nick);
206 snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
207 nick, nick, host, nick);
208 write(srv, bufout, strlen(bufout));
209 snprintf(ping, sizeof ping, "PING %s\r\n", host);
211 setbuf(stdout, NULL); /* unbuffered stdout */
213 for(;;) { /* main loop */
219 i = select(srv + 1, &rd, 0, 0, &tv);
223 die("error: error on select()");
226 if(time(NULL) - trespond >= PINGTIMEOUT)
227 die("error: sic shutting down: parse timeout");
228 write(srv, ping, strlen(ping));
231 if(FD_ISSET(srv, &rd)) {
232 if(readl(srv, sizeof bufin, bufin) == -1)
233 die("error: remote host closed connection");
235 trespond = time(NULL);
237 if(FD_ISSET(0, &rd)) {
238 if(readl(0, sizeof bufin, bufin) == -1)
239 die("error: broken pipe");