Old snippet from the beginning.

winsockircbot.c

//feb 1 2009

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

int main(int argc, char * argv[])
{
        int eid;
        WORD wsaVersion;
        wsaVersion = MAKEWORD(2, 0);
        WSADATA wsaData;

        eid = WSAStartup(wsaVersion, &wsaData);

        if (eid != 0)
        {
                printf("WinSock startup failed.\r\n");
        }

        unsigned int fd;

        fd = socket(AF_INET, SOCK_STREAM, 0);

        if (fd < 0)
        {
                printf("Error in socket file descripter.\r\n");
        }

        struct sockaddr_in s;

        s.sin_family = AF_INET;
        s.sin_port = htons(6667);
        s.sin_addr.s_addr = inet_addr("208.53.152.214");

        eid = connect(fd, (struct sockaddr *) &s, sizeof s);
        if (eid < 0)
        {
                printf("Error connecting socket.\r\n");
        }

        char buffer[512], suffix[512];
        memset(buffer, 0, sizeof buffer);
        sprintf(buffer, "NICK %s\r\n", "windows");
        send(fd, buffer, strlen(buffer), 0);
        memset(buffer, 0, sizeof buffer);
        sprintf(buffer, "USER %s \"\" \"\" :%s\r\n", "svs", "c winsock");
        send(fd, buffer, strlen(buffer), 0);
        memset(buffer, 0, sizeof buffer);
        while (1)
        {
                eid = recv(fd, buffer, sizeof buffer, 0);
                if (eid <= 0)
                {
                        break;
                }
                if (sscanf(buffer, "PING :%s", suffix) > 0)
                {
                        sprintf(buffer, "PONG :%s\r\n", suffix);
                        send(fd, buffer, strlen(buffer), 0);
                }
                printf("%s\r\n", buffer);
                memset(buffer, 0, sizeof buffer);
        }
        closesocket(fd);
        WSACleanup();
        getchar();
        return 0;
}