gistfile1.c

#include <winsock.h>
#include <stdio.h>

#define SERVER "irc server"
#define PORT 6667
#define TIMEOUT 10
#define NICK "BOT"
#define CHAN "#your irc channel"



typedef struct {
    char *cUserNick;                 // Nickname of user (eg: Tux)
    char *cUserHost;                 // Userhost of user (eg: lenience.com)
    char *cUserName;                 // Username of user (eg: root)
    char *cTarget;                   // Pointer to channel or private chat nick...
    char *cMessage;                  // Message sent by user
} Message_Struct;

bool arrayShift(char *cBuffer);
int socketConnect(SOCKET *connection, char *HName, int Port);
int sockPRINT(SOCKET *strSocket, char* cMessage, ...);
int parseArguments(char **args, char *line);
int parseMessage(SOCKET *strSocket, Message_Struct *sMessage);

int main(int argc, char *argv[]) {
    char cBuffer[512];
    char cOutBuffer[512];
    char *lineSPLIT[512];
    char *args[10];
    int bRecv;
    SOCKET strSocket;
    Message_Struct sMessage;

    int tries;
    for(tries=1; socketConnect(&strSocket, SERVER, PORT)!=0; tries++) {
        printf("Failed attempt: %d\r\n",tries);
        Sleep(TIMEOUT*1000);
    }

    sockPRINT(&strSocket, "USER %s \"\" \"127.0.0.1\" :%s\r\n", NICK, NICK);
    sockPRINT(&strSocket, "NICK %s\r\n", NICK);
    Sleep(100);

    sockPRINT(&strSocket, "JOIN %s\r\n", CHAN);
    printf("Success!\n");

    while(1) {
        memset(cBuffer, 0, 512);
        memset(cOutBuffer, 0, 512);

        bRecv = recv(strSocket, cBuffer, 512, 0);
        if( (bRecv == 0) || (bRecv == SOCKET_ERROR) ) break;

        if(cBuffer[0]!=':') {
            strcpy(cOutBuffer, "PONG :");
            sockPRINT(&strSocket, cOutBuffer);
        } else {
            sMessage.cUserNick = strtok(cBuffer, "!");
            arrayShift(sMessage.cUserNick);
            sMessage.cUserName = strtok(NULL, "@");
            sMessage.cUserHost = strtok(NULL, " "); //THE SENDER IP
            strtok(NULL, " "); //THE PRIVMSG
            sMessage.cTarget = strtok(NULL, " "); //RECEIVED IN CHAT ON CHANNEL / NICK
            sMessage.cMessage = strtok(NULL, "\r\n"); //THE MESSAGE WITH A :

            parseMessage(&strSocket, &sMessage);
        }  
    }
    closesocket(strSocket);
    return (1);
}

bool arrayShift(char *cBuffer) {
    for(int i=0; i<strlen(cBuffer); i++) cBuffer[i]=cBuffer[i+1];
    cBuffer[strlen(cBuffer)]='\0';
    return (1);
}

int socketConnect(SOCKET *connection, char *HName, int Port) {
    SOCKADDR_IN serverInfo;
    WSADATA wsaData;
    LPHOSTENT hostEntry;
    if (WSAStartup(MAKEWORD(1, 1), &wsaData) == -1) return (-1);
    if (!(hostEntry = gethostbyname(HName))) {
        WSACleanup();
        return (-1);
    }
    if ((*connection = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) {
        WSACleanup();
        return (-1);
    }
    serverInfo.sin_family = AF_INET;
    serverInfo.sin_addr = *((LPIN_ADDR)*hostEntry->h_addr_list);
    serverInfo.sin_port = htons(Port);
    if (connect(*connection, (LPSOCKADDR)&serverInfo, sizeof(struct sockaddr)) == SOCKET_ERROR) {
        WSACleanup();
        return (-1);
    }
    return (0);
}

int sockPRINT(SOCKET *strSocket, char* cMessage, ...) {
    char cBuffer[512];
    int iError;
    va_list va;
    va_start(va, cMessage);
    vsprintf(cBuffer, cMessage, va);
    va_end(va);
    send(*strSocket, cBuffer, strlen(cBuffer), 0);
    return 1;
}

int parseARGS(char **args, char *line){
int tmp=0;
args[tmp] = strtok( line, "|" );
while ( (args[++tmp] = strtok(NULL, "|" ) ) != NULL );
return tmp - 1;
}

int parseMessage(SOCKET *strSocket, Message_Struct *sMessage) {
    char *argv[512];
    int argc = parseARGS(argv, sMessage->cMessage);

     if(argv[0]!= NULL && !strcmp(argv[0], ":#exit")){
        sockPRINT(strSocket, "\r\nPRIVMSG %s :%c4,0%s called exit routine.\r\n", sMessage->cTarget, 3, sMessage->cUserNick);
        //replace sMessage->cTarget with sMessage->cUserNick if u want to do this in a private chat...
        sockPRINT(strSocket, "\r\nQUIT :%s forced exit.", sMessage->cUserNick);
        Sleep(3000);
        closesocket(*strSocket);
        ExitProcess(0);
    }
     else if (argv[0]!= NULL && !strcmp(argv[0], ":#helo")) {
      sockPRINT(strSocket, "\r\nPRIVMSG %s :%c4,0HELLO THERE %s !.\r\n", sMessage->cTarget, 3, sMessage->cUserNick);
      //replace sMessage->cTarget with sMessage->cUserNick if u want to do this in a private chat...
    }
    return 0;
}