1 /* See LICENSE file for license details. */
4 #include <netinet/in.h>
11 #include <sys/socket.h>
14 #define PINGTIMEOUT 300
20 static void die(const char *errstr, ...);
21 static void printl(char *channel, char *msg);
22 static void privmsg(char *channel, char *msg);
23 static void parsein(char *msg);
24 static void parsesrv(char *msg);
25 static int readl(int fd, unsigned int len, char *buf);
27 static char *host = "irc6.oftc.net";
28 static char *port = "6667";
31 static char bufin[MAXMSG], bufout[MAXMSG];
32 static char channel[256];
34 static time_t trespond;
37 die(const char *errstr, ...) {
40 vfprintf(stderr, errstr, ap);
46 printl(char *channel, char *msg) {
47 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) {
55 if(channel[0] == '\0')
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));
69 privmsg(channel, msg);
72 if(strncmp(msg + 1, "j ", 2) == 0 && (msg[3] == '#'))
73 snprintf(bufout, sizeof bufout, "JOIN %s\r\n", msg + 3);
74 else if(strncmp(msg + 1, "l ", 2) == 0)
75 snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3);
76 else if(strncmp(msg + 1, "m ", 2) == 0 && (p = strchr(msg + 3, ' '))) {
81 else if(strncmp(msg + 1, "s ", 2) == 0) {
82 strncpy(channel, msg + 3, sizeof channel - 1);
86 snprintf(bufout, sizeof bufout, "%s\r\n", msg + 1);
87 write(srv, bufout, strlen(bufout));
92 char *chan, *cmd, *p, *txt, *usr;
96 if(msg == NULL || *msg == '\0' )
101 if(!(p = strchr(msg, ' ')))
106 if((p = strchr(usr, '!')))
109 for(p = cmd; *p != '\0'; p++) /* remove CRLFs */
110 if(*p == '\r' || *p == '\n')
112 if((p = strchr(cmd, ':'))) {
116 if(strncmp("PONG", cmd, 4) == 0)
118 if(strncmp("PRIVMSG", cmd, 7) == 0 && txt != NULL) {
119 if(!(p = strchr(cmd, ' ')))
123 for(; *p != '\0' && *p != ' '; p++);
125 snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt);
126 printl(chan, bufout);
128 else if(strncmp("PING", cmd, 4) == 0 && txt != NULL) {
129 snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt);
130 write(srv, bufout, strlen(bufout));
134 (void) snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt);
136 (void) snprintf(bufout, sizeof bufout, ">< %s: ", cmd);
138 if(strncmp("NICK", cmd, 4) == 0 && strncmp(usr, nick, sizeof nick) == 0 && txt != NULL)
139 strncpy(nick, txt, sizeof nick - 1);
144 readl(int fd, unsigned int len, char *buf) {
149 if(read(fd, &c, sizeof(char)) != (ssize_t) sizeof(char))
153 while(c != '\n' && i < len);
160 main(const int argc, char *const argv[]) {
163 static struct addrinfo hints, *res, *r;
166 char *password = NULL;
168 strncpy(nick, getenv("USER"), sizeof nick - 1);
169 for(i = 1; i < argc; i++)
170 if(strcmp(argv[i], "-h") == 0) {
171 if(++i < argc) host = argv[i];
173 else if(strcmp(argv[i], "-p") == 0) {
174 if(++i < argc) port = argv[i];
176 else if(strcmp(argv[i], "-n") == 0) {
177 if(++i < argc) strncpy(nick, argv[i], sizeof nick - 1);
179 else if(strcmp(argv[i], "-k") == 0) {
180 if(++i < argc) password = argv[i];
182 else if(strcmp(argv[i], "-v") == 0)
183 die("sic-%s, © 2005-2009 sic engineers\n", VERSION);
185 die("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
188 memset(&hints, 0, sizeof hints);
189 hints.ai_family = AF_UNSPEC;
190 hints.ai_socktype = SOCK_STREAM;
191 if(getaddrinfo(host, port, &hints, &res) != 0)
192 die("error: cannot resolve hostname '%s'\n", host);
193 for(r = res; r; r = r->ai_next) {
194 if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
196 if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
202 die("error: cannot connect to host '%s'\n", host);
206 snprintf(bufout, sizeof bufout,
207 "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
208 password, nick, nick, host, nick);
210 snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
211 nick, nick, host, nick);
212 write(srv, bufout, strlen(bufout));
213 snprintf(ping, sizeof ping, "PING %s\r\n", host);
215 setbuf(stdout, NULL); /* unbuffered stdout */
217 for(;;) { /* main loop */
223 i = select(srv + 1, &rd, 0, 0, &tv);
227 die("error: error on select()\n");
230 if(time(NULL) - trespond >= PINGTIMEOUT)
231 die("error: sic shutting down: parse timeout\n");
232 write(srv, ping, strlen(ping));
235 if(FD_ISSET(srv, &rd) != 0) {
236 if(readl(srv, sizeof bufin, bufin) == -1)
237 die("error: remote host closed connection\n");
239 trespond = time(NULL);
241 if(FD_ISSET(0, &rd) != 0) {
242 if(readl(0, sizeof bufin, bufin) == -1)
243 die("error: broken pipe\n");