1 /* See LICENSE file for license details. */
4 #include <netinet/in.h>
11 #include <sys/socket.h>
14 #define PINGTIMEOUT 300
17 static void die(const char *errstr, ...);
18 static void printl(char *channel, char *msg);
19 static void privmsg(char *channel, char *msg);
20 static void parsein(char *msg);
21 static void parsesrv(char *msg);
22 static int readl(int fd, unsigned int len, char *buf);
24 static char *host = "irc6.oftc.net";
25 static char *port = "6667";
26 static char *password = NULL;
29 static char bufin[MAXMSG], bufout[MAXMSG];
30 static char channel[256];
32 static time_t trespond;
35 die(const char *errstr, ...) {
39 vfprintf(stderr, errstr, ap);
45 printl(char *channel, char *msg) {
46 static char timestr[18];
49 strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
50 fprintf(stdout, "%-12.12s: %s %s\n", channel, timestr, msg);
54 privmsg(char *channel, char *msg) {
57 snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg);
58 printl(channel, bufout);
59 snprintf(bufout, sizeof bufout, "PRIVMSG %s :%s\r\n", channel, msg);
60 write(srv, bufout, strlen(bufout));
70 privmsg(channel, msg);
73 if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
74 snprintf(bufout, sizeof bufout, "JOIN %s\r\n", msg + 3);
75 else if(!strncmp(msg + 1, "l ", 2))
76 snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3);
77 else if(!strncmp(msg + 1, "m ", 2)) {
78 if((p = strchr(msg + 3, ' ')))
83 else if(!strncmp(msg + 1, "s ", 2)) {
84 strncpy(channel, msg + 3, sizeof channel);
88 snprintf(bufout, sizeof bufout, "%s\r\n", msg + 1);
89 write(srv, bufout, strlen(bufout));
94 char *chan, *cmd, *p, *txt, *usr;
103 if(!(p = strchr(msg, ' ')))
108 if((p = strchr(usr, '!')))
111 for(p = cmd; *p; p++) /* remove CRLFs */
112 if(*p == '\r' || *p == '\n')
114 if((p = strchr(cmd, ':'))) {
118 if(!strncmp("PONG", cmd, 4))
120 if(!strncmp("PRIVMSG", cmd, 7) && txt) {
121 if(!(p = strchr(cmd, ' ')))
125 for(; *p && *p != ' '; p++);
127 snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt);
128 printl(chan, bufout);
130 else if(!strncmp("PING", cmd, 4) && txt) {
131 snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt);
132 write(srv, bufout, strlen(bufout));
135 snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt ? txt : "");
137 if(!strncmp("NICK", cmd, 4) && !strncmp(usr, nick, sizeof nick) && txt)
138 strncpy(nick, txt, sizeof nick);
143 readl(int fd, unsigned int len, char *buf) {
148 if(read(fd, &c, sizeof(char)) != sizeof(char))
152 while(c != '\n' && i < len);
159 main(int argc, char *argv[]) {
162 static struct addrinfo hints, *res, *r;
166 strncpy(nick, getenv("USER"), sizeof nick);
167 for(i = 1; i < argc; i++)
168 if(!strncmp(argv[i], "-h", 3)) {
169 if(++i < argc) host = argv[i];
171 else if(!strncmp(argv[i], "-p", 3)) {
172 if(++i < argc) port = argv[i];
174 else if(!strncmp(argv[i], "-n", 3)) {
175 if(++i < argc) strncpy(nick, argv[i], sizeof nick);
177 else if(!strncmp(argv[i], "-k", 3)) {
178 if(++i < argc) password = argv[i];
180 else if(!strncmp(argv[i], "-v", 3))
181 die("sic-"VERSION", © 2005-2009 sic engineers\n");
183 die("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
186 memset(&hints, 0, sizeof hints);
187 hints.ai_family = AF_UNSPEC;
188 hints.ai_socktype = SOCK_STREAM;
189 if(getaddrinfo(host, port, &hints, &res) != 0)
190 die("error: cannot resolve hostname '%s'\n", host);
191 for(r = res; r; r = r->ai_next) {
192 if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
194 if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
200 die("error: cannot connect to host '%s'\n", host);
204 snprintf(bufout, sizeof bufout,
205 "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
206 password, nick, nick, host, nick);
208 snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
209 nick, nick, host, nick);
210 write(srv, bufout, strlen(bufout));
211 snprintf(ping, sizeof ping, "PING %s\r\n", host);
213 setbuf(stdout, NULL); /* unbuffered stdout */
215 for(;;) { /* main loop */
221 i = select(srv + 1, &rd, 0, 0, &tv);
225 die("error: error on select()\n");
228 if(time(NULL) - trespond >= PINGTIMEOUT)
229 die("error: sic shutting down: parse timeout\n");
230 write(srv, ping, strlen(ping));
233 if(FD_ISSET(srv, &rd)) {
234 if(readl(srv, sizeof bufin, bufin) == -1)
235 die("error: remote host closed connection\n");
237 trespond = time(NULL);
239 if(FD_ISSET(0, &rd)) {
240 if(readl(0, sizeof bufin, bufin) == -1)
241 die("error: broken pipe\n");