X-Git-Url: https://git.armaanb.net/?a=blobdiff_plain;f=sic.c;h=2bfd7003c0137d677cc93af9332cd2312b9dbacc;hb=ca6ba9a64a1332bf2bb4fac4b08030812dc3ff07;hp=0a875ab5de0730b156a744763f696ec52a1bb2e6;hpb=60fc462aa931748914c9c221f73505413933d4cc;p=sic.git diff --git a/sic.c b/sic.c index 0a875ab..2bfd700 100644 --- a/sic.c +++ b/sic.c @@ -1,10 +1,8 @@ -/* (C)opyright MMV-MMVI Anselm R. Garbe - * (C)opyright MMV-MMVI Nico Golde - * See LICENSE file for license details. - */ +/* See LICENSE file for license details. */ #include #include #include +#include #include #include #include @@ -14,36 +12,37 @@ #include #define PINGTIMEOUT 300 -#define MAXMSG 4096 +#define MAXMSG 4096 -static char *host = "irc.oftc.net"; -static unsigned short port = 6667; -static char *nick = NULL; -static char *fullname = NULL; +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 *password = NULL; +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; +void +die(const char *errstr, ...) { + va_list ap; - 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; + 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); @@ -51,17 +50,17 @@ pout(char *channel, char *msg) { fprintf(stdout, "%-12.12s: %s %s\n", channel, timestr, msg); } -static void +void privmsg(char *channel, char *msg) { if(channel[0] == 0) return; snprintf(bufout, sizeof bufout, "<%s> %s", nick, msg); - pout(channel, bufout); + 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; @@ -72,45 +71,43 @@ parsein(char *msg) { return; } if(!strncmp(msg + 1, "j ", 2) && (msg[3] == '#')) - snprintf(bufout, sizeof bufout, "JOIN %s\r\n", &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 - 250 LOC are too much!\r\n", &msg[3]); + snprintf(bufout, sizeof bufout, "PART %s :sic - 250 LOC are too much!\r\n", msg + 3); else if(!strncmp(msg + 1, "m ", 2)) { - if((p = strchr(&msg[3], ' '))) + if((p = strchr(msg + 3, ' '))) *(p++) = 0; - privmsg(&msg[3], p); + privmsg(msg + 3, p); return; } else if(!strncmp(msg + 1, "s ", 2)) { - strncpy(channel, &msg[3], sizeof channel); + strncpy(channel, msg + 3, sizeof channel); 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 void +void parsesrv(char *msg) { char *chan, *cmd, *p, *txt, *usr; txt = NULL; + usr = host; if(!msg || !(*msg)) return; if(msg[0] != ':') - return; /* don't handle prefix-less server commands */ - if(!(p = strchr(msg, ' '))) - return; - usr = &msg[1]; - *p = 0; - cmd = ++p; - if((p = strchr(usr, '!'))) + cmd = msg; + else { + if(!(p = strchr(msg, ' '))) + return; *p = 0; + usr = msg + 1; + cmd = ++p; + if((p = strchr(usr, '!'))) + *p = 0; + } for(p = cmd; *p; p++) /* remove CRLFs */ if(*p == '\r' || *p == '\n') *p = 0; @@ -128,7 +125,7 @@ parsesrv(char *msg) { for(; *p && *p != ' '; p++); *p = 0; snprintf(bufout, sizeof bufout, "<%s> %s", usr, txt); - pout(chan, bufout); + printl(chan, bufout); } else if(!strncmp("PING", cmd, 4) && txt) { snprintf(bufout, sizeof bufout, "PONG %s\r\n", txt); @@ -136,71 +133,80 @@ parsesrv(char *msg) { } else { snprintf(bufout, sizeof bufout, ">< %s: %s", cmd, txt ? txt : ""); - pout(usr, bufout); + printl(usr, bufout); + if(!strncmp("NICK", cmd, 4) && !strncmp(usr, nick, sizeof nick) && txt) + strncpy(nick, txt, sizeof nick); } } +int +readl(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; +} + + int main(int argc, char *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; - nick = fullname = getenv("USER"); + strncpy(nick, getenv("USER"), sizeof nick); for(i = 1; i < argc; i++) if(!strncmp(argv[i], "-h", 3)) { if(++i < argc) host = argv[i]; } else if(!strncmp(argv[i], "-p", 3)) { - if(++i < argc) port = (unsigned short)atoi(argv[i]); + if(++i < argc) port = argv[i]; } else if(!strncmp(argv[i], "-n", 3)) { - if(++i < argc) nick = argv[i]; + if(++i < argc) strncpy(nick, argv[i], sizeof nick); } else if(!strncmp(argv[i], "-k", 3)) { 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 [-h host] [-p port] [-n nick]" - " [-k keyword] [-f fullname] [-v]\n", stderr); - exit(EXIT_FAILURE); - } + else if(!strncmp(argv[i], "-v", 3)) + die("sic-"VERSION", © 2005-2009 sic engineers\n"); + 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 host '%s'\n", host); - exit(EXIT_FAILURE); - } - if (NULL == (hp = gethostbyname(host))) { - fprintf(stderr, "sic: cannot resolve hostname '%s'\n", host); - 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(ri = 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 host '%s'\n", host); - 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, host, fullname); + "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, host, fullname); + nick, nick, host, nick); write(srv, bufout, strlen(bufout)); snprintf(ping, sizeof ping, "PING %s\r\n", host); channel[0] = 0; @@ -216,29 +222,23 @@ main(int argc, char *argv[]) { 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(host, "-!- 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 host closed connection"); - exit(EXIT_FAILURE); - } + 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(readl(0, sizeof bufin, bufin) == -1) + die("error: broken pipe\n"); parsein(bufin); } }