/*******************************************************************************
*
* File : bbirc.c
* Author : ceeg
* Created : Tue May 22 05:46:13 2007
* Modified : Wed May 23 15:59:49 2007
* Website : www.chrisgillis.net
*
* === bbIRC is a barebonesIRC bot. I'll add stuff when I feel like it. My
* code is probably crap and will destroy your PC so don't run it :)
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*
*******************************************************************************/
/* First things first, we must include all necessary header files
* Note I have commented each line with the functions the header
* provides access to
*/
/* The only headers included that are related to sockets are inet.h
* and socket.h
*/
#include <stdio.h> /* printf() */
#include <stdlib.h> /* atoi() */
#include <string.h> /* we'll use some string funcs, also memset() */
#include <stdarg.h> /* for variable argument lists */
#include <arpa/inet.h> /* sockaddr_in, inet_addr() */
#include <sys/socket.h> /* socket(), connect(), send(), recv() */
#include <unistd.h> /* close() */
/* I've defined a datatype called IrcConnection that will hold
* all of the variables related to connecting to an IRC server
*/
typedef struct {
/* The socket our server will transmit data on */
int sock;
/* The server address */
struct sockaddr_in ircServerAddr;
/* The port we're going to connect on */
unsigned short ircServerPort;
/* A pointer to char for storing the IP */
char *serverIp;
/* A pointer to char for storing the bots nick */
char *nickname;
/* A pointer to char for storing the channel to join */
char *channel;
} IrcConnection;
#define RECVBUFSIZE 1024 /* The size alloted to the buffer we're going to use
* for the recv() buffer */
#define VERSION 0.1 /* Version number */
void DieWithError( char *errorMessage ); /* outputs errorMessage and quits */
int IrcSend( IrcConnection *, char *format, ...); /* sends a message over an IrcConnection */
int main ( int argc, char *argv[] )
{
char recvBuf[RECVBUFSIZE]; /* buffer used for storing recv() messages */
unsigned short bytesRcvd = 0; /* used for indexing recvBuf after recv() */
char pongedOnce = 0; /* bot sent pong? */
char inChannel = 0; /* bot joined a channel? */
char *match; /* used for matching messages */
/* Create a pointer to IrcConnection */
IrcConnection con, *irc = &con;
/* Check correct size of argc */
if ( (argc < 4) || (argc > 5) )
{
fprintf(stderr, "Usage: %s <Server IP> <Nick> <Channel> [port]\n", argv[0]);
exit(1);
}
/* Assign values to irc struct */
irc->serverIp = argv[1];
irc->nickname = argv[2];
irc->channel = argv[3];
/* explicit port? */
if ( argc == 5 )
irc->ircServerPort = atoi(argv[4]); /* set port to specified */
else
irc->ircServerPort = 6667; /* or use standard */
/* init the socket */
if ((irc->sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0)
DieWithError("Error: socket() failed.");
/* To my knowledge, it is required on some systems to zero the structure
* Please correct me if i'm wrong/out of date on this
*/
memset(&(irc->ircServerAddr), 0, sizeof(irc->ircServerAddr));
/* internet address family */
irc->ircServerAddr.sin_family = AF_INET;
/* server ip */
irc->ircServerAddr.sin_addr.s_addr = inet_addr(irc->serverIp);
/* http://retran.com/beej/htonsman.html */
irc->ircServerAddr.sin_port = htons(irc->ircServerPort);
/* It's about time we got to connect() right? */
if (connect(irc->sock, (struct sockaddr *) &(irc->ircServerAddr), sizeof(irc->ircServerAddr)) < 0)
DieWithError("Error: connect() failed.");
/* Well shoot, if it's gotten this far you're connected to an IRC server.
* Not for long though ;)
* We need to send a few strings to the server so it doesnt boot us off!
* NICK <nickname>
* USER nick nick nick :nick
*/
if (IrcSend(irc, "NICK %s\nUSER %s . . :%sv%.1f\n", irc->nickname, irc->nickname, irc->nickname, VERSION) < 0)
DieWithError("Error: sending nick/usr failed.");
/* After you send a USER and a NICK you HAVE to start receiving. The server
* will likely send a "PING :<string>" message and you MUST reply to it with
* "PONG :<string>" where <string> == <string>, this is so the server can
* remove dropped connections
*/
/* ============= Main Loop ============= */
while (1) /* repeat until terminated */
{
if ((bytesRcvd = recv(irc->sock, recvBuf, RECVBUFSIZE-1, 0)) <= 0)
DieWithError("recv failed\n");
recvBuf[bytesRcvd] = '\0';
printf(recvBuf);
/* We now effectively have a message stored in our recv buffer
* It would be good if we could search it for PING
* y hullo thar, string.h
*/
if ((match = strstr(recvBuf, "PING")) != NULL)
{
/* A pong message is in the format PONG :<string>
* "PING :" is 6chars. match+6 is the start of the string we have
* to reply back with.
*/
IrcSend( irc, "PONG :%s\n", match+6 );
printf("PONG!\n");
pongedOnce = 1; /* so we can join a channel (gotta send pong first) */
}
if((pongedOnce == 1) && (inChannel == 0))
{
IrcSend(irc, "JOIN #%s\n", irc->channel);
inChannel++;
IrcSend(irc, "PRIVMSG #%s :%s\n", irc->channel, "WOMP WOMP WOMP.");
}
}
return 0;
}
/* DieWithError
*/
void DieWithError( char *errorMsg )
{
perror(errorMsg);
exit(1);
}
/* IrcSend
* = treat it like sprintf on an IrcConnection
*/
int IrcSend( IrcConnection * ircon, char *format, ...)
{
va_list args;
char *buffer = malloc(1024);
unsigned int bufLen;
int retn = 0;
va_start(args, format);
vsprintf(buffer, format, args);
va_end(args);
bufLen = strlen(buffer);
if (send(ircon->sock, buffer, bufLen, 0) == bufLen)
goto out;
else
{
retn = -1;
goto out;
}
out:
free(buffer);
return retn;
}