IRC bot still in works

#include <sys/types.h>
#include <sys/socket.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <netdb.h>
#include <string.h>
#include <ctype.h>
#include <stdarg.h>

#define IRC_PORT 6667
#define BUFFER_SIZE 2048

int connect_to_irc(int* sockfd, char* irc_channel, int port);
int get_on_channel(int* sockfd, char* channel, char* nick, char* buf);
int write_to_socket(int* sockfd, char* buf, char* fmt, ...);

int main(int argc, char** argv) {

    int sockfd;
    connect_to_irc(&sockfd, "irc.freenode.net", 6667);

    char buf[BUFFER_SIZE+1]; char out[BUFFER_SIZE+1];
    int n;

    get_on_channel(&sockfd, "#nullbyte", "PineTree", out);

    while( (n = read(sockfd, buf, BUFFER_SIZE)) ) {
        if (n <= 0) continue;

        buf[n] = 0;

        if (strncmp(buf, "PING", 4) {
            printf("We got PING'd\n");

            buf[1] = 'O';

            send(sockfd, out, strlen(out), 0);
        }

        if (strstr(buf, "@slap") != NULL) {
            out[0] = 0;

            char* pos = strstr(buf, "@slap ") + 6;
            sprintf(out, "\rPRIVMSG #nullbyte :ACTION slapped the hell outta %s\r\n", pos);

            send(sockfd, out, strlen(out), 0);
        }

        if (strstr(buf, "@google ") != NULL) {
            char* google_url = "http://google.com/#q=";
            char* pos = strstr(buf, "@google ") + 8;

            char* result = malloc(strlen(google_url)+strlen(pos));
            if (result == NULL) continue;

            strcpy(result, google_url);
            int x = strlen(google_url);
            for (int i = 0, n = strlen(pos); i < n; i++) {
                if ( isalnum(pos[i]) )
                    result[x] = pos[i];
                else if ( isspace(pos[i]) )
                    result[x] = '+';

                x++;

            }

            out[0] = 0;
            sprintf(out, "\rPRIVMSG #nullbyte :%s\r\n", result);

            send(sockfd, out, strlen(out),0);
            memset(result, 0, strlen(result));
            free(result);
        }

        printf("%s\n", buf);
    }

    printf("click enter to exit");
    scanf("%c",buf);

    close(sockfd);

    return 0;
}
int connect_to_irc(int* sockfd, char* irc_channel, int port) {
    struct sockaddr_in serv_addr;
    struct hostent *server;

    *sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (*sockfd < 0) {
        perror("socket could not be opened");
        exit(1);
    }

    server = gethostbyname("irc.freenode.net");
    if (server == NULL) {
        perror("host not found");
        close(*sockfd);
        exit(2);
    }

    memset(&serv_addr, 0, sizeof(serv_addr));

    bcopy(
        (char*)server->h_addr,
        (char*)&serv_addr.sin_addr.s_addr,
        server->h_length
        );

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(IRC_PORT);

    if ( connect(*sockfd, (struct sockaddr*) &serv_addr, sizeof(serv_addr)) < 0 ) {
        perror("error connecting...");
        close(*sockfd);
        exit(3);
    }

    return *sockfd;
}
int get_on_channel(int* sockfd, char* channel, char* nick, char* buf) {

    write_to_socket(sockfd, buf, "\rUSER %s 0 * :%s\r\n", nick, nick);
    write_to_socket(sockfd, buf, "\rNICK %s\r\n", nick);
    write_to_socket(sockfd, buf, "\rJOIN %s\r\n", channel);

    return 0;
}
int write_to_socket(int* sockfd, char* buf, char* fmt, ...) {
    memset(buf, 0, BUFFER_SIZE);

    va_list ap;
    va_start(ap,fmt);

    vsnprintf(buf, BUFFER_SIZE, fmt, ap);

    va_end(ap);

    write(*sockfd, buf, strlen(buf));

    return 0;
}