-/* (C)opyright MMV-MMVI Anselm R. Garbe <garbeam at gmail dot com>
- * (C)opyright MMV-MMVI Nico Golde <nico at ngolde dot de>
- * See LICENSE file for license details.
- */
+/* See LICENSE file for license details. */
#include <errno.h>
#include <netdb.h>
#include <netinet/in.h>
+#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/time.h>
#define PINGTIMEOUT 300
-#define MAXMSG 4096
-
-enum { Tnick, Tuser, Tcmd, Tchan, Targ, Ttext, Tlast };
-
-static char *server = "irc.oftc.net";
-static unsigned short port = 6667;
-static char *nick = NULL;
-static char *fullname = NULL;
-static char *password = NULL;
+#define MAXMSG 4096
+#ifndef VERSION
+#define VERSION "dev"
+#endif
+
+static void die(const char *errstr, ...);
+static void printl(char *channel, char *msg);
+static void privmsg(char *channel, char *msg);
+static void parsein(char *msg);
+static void parsesrv(char *msg);
+static int readl(int fd, unsigned int len, char *buf);
+
+static char *host = "irc6.oftc.net";
+static char *port = "6667";
+static char nick[32];
static char bufin[MAXMSG], bufout[MAXMSG];
static char channel[256];
static int srv;
static time_t trespond;
-static int
-getline(int fd, unsigned int len, char *buf) {
- unsigned int i = 0;
- char c;
-
- do {
- if(read(fd, &c, sizeof(char)) != sizeof(char))
- return -1;
- buf[i++] = c;
- }
- while(c != '\n' && i < len);
- buf[i - 1] = 0;
- return 0;
+void
+die(const char *errstr, ...) {
+ va_list ap;
+ va_start(ap, errstr);
+ vfprintf(stderr, errstr, ap);
+ va_end(ap);
+ exit(EXIT_FAILURE);
}
-static void
-pout(char *channel, char *msg) {
+void
+printl(char *channel, char *msg) {
static char timestr[18];
time_t t = time(0);
-
- strftime(timestr, sizeof(timestr), "%F %R", localtime(&t));
- fprintf(stdout, "%-8.8s: %s %s\n", channel, timestr, msg);
+ strftime(timestr, sizeof timestr, "%D %R", localtime(&t));
+ fprintf(stdout, "%-12.12s: %s %s\n", channel, timestr, msg);
}
-static void
+void
privmsg(char *channel, char *msg) {
- snprintf(bufout, sizeof(bufout), "<%s> %s", nick, msg);
- pout(channel, bufout);
- snprintf(bufout, sizeof(bufout), "PRIVMSG %s :%s\r\n", channel, msg);
+ if(channel[0] == '\0')
+ return;
+ snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg);
+ printl(channel, bufout);
+ snprintf(bufout, sizeof bufout, "PRIVMSG %s :%s\r\n", channel, msg);
write(srv, bufout, strlen(bufout));
}
-static void
+void
parsein(char *msg) {
- char *p;
-
- if(msg[0] == 0)
+ char *p = NULL;
+ if(msg[0] == '\0')
return;
- if(msg[0] != '/') {
+ if(msg[0] != ':') {
privmsg(channel, msg);
return;
}
- if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#'))
- snprintf(bufout, sizeof(bufout), "JOIN %s\r\n", &msg[3]);
- else if(!strncmp(msg + 1, "l ", 2))
- snprintf(bufout, sizeof(bufout), "PART %s :sic\r\n", &msg[3]);
- else if(!strncmp(msg + 1, "m ", 2)) {
- if((p = strchr(&msg[3], ' ')))
- *(p++) = 0;
- privmsg(&msg[3], p);
+ if(strncmp(msg + 1, "j ", 2) == 0 && (msg[3] == '#'))
+ snprintf(bufout, sizeof bufout, "JOIN %s\r\n", msg + 3);
+ else if(strncmp(msg + 1, "l ", 2) == 0)
+ snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3);
+ else if(strncmp(msg + 1, "m ", 2) == 0) {
+ if((p = strchr(msg + 3, ' ')))
+ *(p++) = '\0';
+ privmsg(msg + 3, p);
return;
}
- else if(!strncmp(msg + 1, "s ", 2)) {
- strncpy(channel, &msg[3], sizeof(channel));
+ else if(strncmp(msg + 1, "s ", 2) == 0) {
+ strncpy(channel, msg + 3, sizeof channel - 1);
return;
}
- else if(!strncmp(msg + 1, "t ", 2)) {
- if((p = strchr(&msg[3], ' ')))
- *(p++) = 0;
- snprintf(bufout, sizeof(bufout), "TOPIC %s :%s\r\n", &msg[3], p);
- }
else
- snprintf(bufout, sizeof(bufout), "%s\r\n", &msg[1]);
+ snprintf(bufout, sizeof bufout, "%s\r\n", msg + 1);
write(srv, bufout, strlen(bufout));
}
-static unsigned int
-tokenize(char **result, unsigned int reslen, char *str, char delim) {
- char *p, *n;
- unsigned int i = 0;
-
- if(!str)
- return 0;
- for(n = str; *n == delim; n++);
- p = n;
- for(i = 0; *n != 0;) {
- if(i == reslen)
- return i;
- if(*n == delim) {
- *n = 0;
- if(strlen(p))
- result[i++] = p;
- p = ++n;
- } else
- n++;
- }
- if((i < reslen) && (p < n) && strlen(p))
- result[i++] = p;
- return i; /* number of tokens */
-}
-
-static void
+void
parsesrv(char *msg) {
- char *argv[Tlast], *cmd, *p;
- int i;
+ char *chan, *cmd, *p, *txt, *usr;
- if(!msg || !(*msg))
+ txt = NULL;
+ usr = host;
+ if(msg == NULL || *msg == '\0' )
return;
-
- for(i = 0; i < Tlast; i++)
- argv[i] = NULL;
-
- /* <bufout> ::= [':' <prefix> <SPACE> ] <command> <params> <crlf>
- * <prefix> ::= <servername> | <nick> [ '!' <user> ] [ '@' <server> ]
- * <command> ::= <letter> { <letter> } | <number> <number> <number>
- * <SPACE> ::= ' ' { ' ' }
- * <params> ::= <SPACE> [ ':' <trailing> | <middle> <params> ]
- * <middle> ::= <Any *non-empty* sequence of octets not including SPACE
- * or NUL or CR or LF, the first of which may not be ':'>
- * <trailing> ::= <Any, possibly *empty*, sequence of octets not including NUL or CR or LF>
- * <crlf> ::= CR LF
- */
- if(msg[0] == ':') { /* check prefix */
- p = strchr(msg, ' ');
- *p = 0;
- for(++p; *p == ' '; p++);
- cmd = p;
- argv[Tnick] = &msg[1];
- if((p = strchr(msg, '!'))) {
- *p = 0;
- argv[Tuser] = ++p;
- }
- } else
+ if(msg[0] != ':')
cmd = msg;
- /* remove CRLFs */
- for(p = cmd; p && *p != 0; p++)
+ else {
+ if(!(p = strchr(msg, ' ')))
+ return;
+ *p = '\0';
+ usr = msg + 1;
+ cmd = ++p;
+ if((p = strchr(usr, '!')))
+ *p = '\0';
+ }
+ for(p = cmd; *p != '\0'; p++) /* remove CRLFs */
if(*p == '\r' || *p == '\n')
- *p = 0;
+ *p = '\0';
if((p = strchr(cmd, ':'))) {
- *p = 0;
- argv[Ttext] = ++p;
+ *p = '\0';
+ txt = ++p;
}
- tokenize(&argv[Tcmd], Tlast - Tcmd, cmd, ' ');
- if(!strncmp("PONG", argv[Tcmd], 5))
- return;
- else if(!strncmp("PING", argv[Tcmd], 5)) {
- snprintf(bufout, sizeof(bufout), "PONG %s\r\n", argv[Ttext]);
- write(srv, bufout, strlen(bufout));
+ if(strncmp("PONG", cmd, 4) == 0)
return;
+ if(strncmp("PRIVMSG", cmd, 7) == 0 && txt != NULL) {
+ if(!(p = strchr(cmd, ' ')))
+ return;
+ *p = '\0';
+ chan = ++p;
+ for(; *p != '\0' && *p != ' '; p++);
+ *p = '\0';
+ snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt);
+ printl(chan, bufout);
}
- else if(!argv[Tnick] || !argv[Tuser]) { /* server command */
- snprintf(bufout, sizeof(bufout), "%s", argv[Ttext] ? argv[Ttext] : "");
- pout(server, bufout);
- return;
+ else if(strncmp("PING", cmd, 4) == 0 && txt != NULL) {
+ snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt);
+ write(srv, bufout, strlen(bufout));
}
- else if(!strncmp("ERROR", argv[Tcmd], 6))
- snprintf(bufout, sizeof(bufout), "-!- error %s",
- argv[Ttext] ? argv[Ttext] : "unknown");
- else if(!strncmp("JOIN", argv[Tcmd], 5)) {
- if(argv[Ttext]!=NULL){
- p = strchr(argv[Ttext], ' ');
- if(p)
- *p = 0;
- }
- argv[Tchan] = argv[Ttext];
- snprintf(bufout, sizeof(bufout), "-!- %s(%s) has joined %s",
- argv[Tnick], argv[Tuser], argv[Ttext]);
+ else {
+ if (txt != NULL)
+ (void) snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt);
+ else
+ (void) snprintf(bufout, sizeof bufout, ">< %s: ", cmd);
+ printl(usr, bufout);
+ if(strncmp("NICK", cmd, 4) == 0 && strncmp(usr, nick, sizeof nick) == 0 && txt != NULL)
+ strncpy(nick, txt, sizeof nick - 1);
}
- else if(!strncmp("PART", argv[Tcmd], 5)) {
- snprintf(bufout, sizeof(bufout), "-!- %s(%s) has left %s",
- argv[Tnick], argv[Tuser], argv[Tchan]);
+}
+
+int
+readl(int fd, unsigned int len, char *buf) {
+ unsigned int i = 0;
+ char c = '\0';
+
+ do {
+ if(read(fd, &c, sizeof(char)) != (ssize_t) sizeof(char))
+ return -1;
+ buf[i++] = c;
}
- else if(!strncmp("MODE", argv[Tcmd], 5))
- snprintf(bufout, sizeof(bufout), "-!- %s changed mode/%s -> %s %s",
- argv[Tnick], argv[Tcmd + 1],
- argv[Tcmd + 2], argv[Tcmd + 3]);
- else if(!strncmp("QUIT", argv[Tcmd], 5))
- snprintf(bufout, sizeof(bufout), "-!- %s(%s) has quit \"%s\"",
- argv[Tnick], argv[Tuser],
- argv[Ttext] ? argv[Ttext] : "");
- else if(!strncmp("NICK", argv[Tcmd], 5))
- snprintf(bufout, sizeof(bufout), "-!- %s changed nick to %s",
- argv[Tnick], argv[Ttext]);
- else if(!strncmp("TOPIC", argv[Tcmd], 6))
- snprintf(bufout, sizeof(bufout), "-!- %s changed topic to \"%s\"",
- argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
- else if(!strncmp("KICK", argv[Tcmd], 5))
- snprintf(bufout, sizeof(bufout), "-!- %s kicked %s (\"%s\")",
- argv[Tnick], argv[Targ],
- argv[Ttext] ? argv[Ttext] : "");
- else if(!strncmp("NOTICE", argv[Tcmd], 7))
- snprintf(bufout, sizeof(bufout), "-!- \"%s\")",
- argv[Ttext] ? argv[Ttext] : "");
- else if(!strncmp("PRIVMSG", argv[Tcmd], 8))
- snprintf(bufout, sizeof(bufout), "<%s> %s",
- argv[Tnick], argv[Ttext] ? argv[Ttext] : "");
- if(!argv[Tchan] || !strncmp(argv[Tchan], nick, strlen(nick)))
- pout(argv[Tnick], bufout);
- else
- pout(argv[Tchan], bufout);
+ while(c != '\n' && i < len);
+ buf[i - 1] = '\0';
+ return 0;
}
+
int
-main(int argc, char *argv[]) {
+main(const int argc, char *const argv[]) {
int i;
struct timeval tv;
- struct hostent *hp;
- static struct sockaddr_in addr; /* initially filled with 0's */
+ static struct addrinfo hints, *res, *r;
char ping[256];
fd_set rd;
+ char *password = NULL;
- nick = fullname = getenv("USER");
+ strncpy(nick, getenv("USER"), sizeof nick - 1);
for(i = 1; i < argc; i++)
- if(!strncmp(argv[i], "-s", 3)) {
- if(++i < argc) server = argv[i];
+ if(strcmp(argv[i], "-h") == 0) {
+ if(++i < argc) host = argv[i];
}
- else if(!strncmp(argv[i], "-p", 3)) {
- if(++i < argc) port = (unsigned short)atoi(argv[i]);
+ else if(strcmp(argv[i], "-p") == 0) {
+ if(++i < argc) port = argv[i];
}
- else if(!strncmp(argv[i], "-n", 3)) {
- if(++i < argc) nick = argv[i];
+ else if(strcmp(argv[i], "-n") == 0) {
+ if(++i < argc) strncpy(nick, argv[i], sizeof nick - 1);
}
- else if(!strncmp(argv[i], "-k", 3)) {
+ else if(strcmp(argv[i], "-k") == 0) {
if(++i < argc) password = argv[i];
}
- else if(!strncmp(argv[i], "-f", 3)) {
- if(++i < argc) fullname = argv[i];
- }
- else if(!strncmp(argv[i], "-v", 3)) {
- fputs("sic-"VERSION", (C)opyright MMVI Anselm R. Garbe\n", stdout);
- exit(EXIT_SUCCESS);
- }
- else {
- fputs("usage: sic [-s server] [-p port] [-n nick]"
- " [-k keyword] [-f fullname] [-v]\n", stderr);
- exit(EXIT_FAILURE);
- }
+ else if(strcmp(argv[i], "-v") == 0)
+ die("sic-%s, © 2005-2009 sic engineers\n", VERSION);
+ else
+ die("usage: sic [-h host] [-p port] [-n nick] [-k keyword] [-v]\n");
/* init */
- if((srv = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
- fprintf(stderr, "sic: cannot connect server '%s'\n", server);
- exit(EXIT_FAILURE);
- }
- if (NULL == (hp = gethostbyname(server))) {
- fprintf(stderr, "sic: cannot resolve hostname '%s'\n", server);
- exit(EXIT_FAILURE);
- }
- addr.sin_family = AF_INET;
- addr.sin_port = htons(port);
- memcpy(&addr.sin_addr, hp->h_addr, hp->h_length);
- if(connect(srv, (struct sockaddr *) &addr, sizeof(struct sockaddr_in))) {
+ memset(&hints, 0, sizeof hints);
+ hints.ai_family = AF_UNSPEC;
+ hints.ai_socktype = SOCK_STREAM;
+ if(getaddrinfo(host, port, &hints, &res) != 0)
+ die("error: cannot resolve hostname '%s'\n", host);
+ for(r = res; r; r = r->ai_next) {
+ if((srv = socket(r->ai_family, r->ai_socktype, r->ai_protocol)) == -1)
+ continue;
+ if(connect(srv, r->ai_addr, r->ai_addrlen) == 0)
+ break;
close(srv);
- fprintf(stderr, "sic: cannot connect server '%s'\n", server);
- exit(EXIT_FAILURE);
}
+ freeaddrinfo(res);
+ if(!r)
+ die("error: cannot connect to host '%s'\n", host);
+
/* login */
- if(password)
- snprintf(bufout, sizeof(bufout),
- "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
- password, nick, nick, server, fullname);
+ if (password)
+ snprintf(bufout, sizeof bufout,
+ "PASS %s\r\nNICK %s\r\nUSER %s localhost %s :%s\r\n",
+ password, nick, nick, host, nick);
else
- snprintf(bufout, sizeof(bufout), "NICK %s\r\nUSER %s localhost %s :%s\r\n",
- nick, nick, server, fullname);
+ snprintf(bufout, sizeof bufout, "NICK %s\r\nUSER %s localhost %s :%s\r\n",
+ nick, nick, host, nick);
write(srv, bufout, strlen(bufout));
- snprintf(ping, sizeof(ping), "PING %s\r\n", server);
- channel[0] = 0;
+ snprintf(ping, sizeof ping, "PING %s\r\n", host);
+ channel[0] = '\0';
setbuf(stdout, NULL); /* unbuffered stdout */
for(;;) { /* main loop */
if(i < 0) {
if(errno == EINTR)
continue;
- perror("sic: error on select()");
- exit(EXIT_FAILURE);
- } else if(i == 0) {
- if(time(NULL) - trespond >= PINGTIMEOUT) {
- pout(server, "-!- sic shutting down: parse timeout");
- exit(EXIT_FAILURE);
- }
+ die("error: error on select()\n");
+ }
+ else if(i == 0) {
+ if(time(NULL) - trespond >= PINGTIMEOUT)
+ die("error: sic shutting down: parse timeout\n");
write(srv, ping, strlen(ping));
continue;
}
- if(FD_ISSET(srv, &rd)) {
- if(getline(srv, sizeof(bufin), bufin) == -1) {
- perror("sic: remote server closed connection");
- exit(EXIT_FAILURE);
- }
+ if(FD_ISSET(srv, &rd) != 0) {
+ if(readl(srv, sizeof bufin, bufin) == -1)
+ die("error: remote host closed connection\n");
parsesrv(bufin);
trespond = time(NULL);
}
- if(FD_ISSET(0, &rd)) {
- if(getline(0, sizeof(bufin), bufin) == -1) {
- perror("sic: broken pipe");
- exit(EXIT_FAILURE);
- }
+ if(FD_ISSET(0, &rd) != 0) {
+ if(readl(0, sizeof bufin, bufin) == -1)
+ die("error: broken pipe\n");
parsein(bufin);
}
}