Mine

/* My Simple IRC implemantation *//* bugy coded by awan */#include <iostream>#include <cstdlib>#include <sys/socket.h>#include <arpa/inet.h>#include <unistd.h>#include <netinet/in.h>#include <netdb.h>#define size 45#define buf_size 4096using namespace std;class client{   public:      void prisijungti(char *c, int port);      char * ns(char *addr);      void die(char *msg);      void quit(char *msg);      void user(char *nick, char *usr, char *name);      int parse(int msg);      int rasti(char *c);      int fill(char *c, char *d);   private:     int sock;};void client::prisijungti(char *c, int port){   struct sockaddr_in ircsrv;   unsigned int srvlen;   if ((sock = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP)) < 0) die("failed to create socket");   memset(&ircsrv, 0, sizeof(ircsrv));   ircsrv.sin_family = 	AF_INET;   ircsrv.sin_addr.s_addr = inet_addr(ns(c));   ircsrv.sin_port = htons(port);   if (connect(sock, (struct sockaddr *) &ircsrv, sizeof(ircsrv)) < 0) die("failed connect to server");}char * client::ns(char *addr){   struct hostent *host;   struct in_addr h_addr;   if ((host = gethostbyname(addr)) == NULL) die("Can't get hostname");   h_addr.s_addr = *( (unsigned long *) host-> h_addr_list[0] );   return (inet_ntoa(h_addr));}void client::die(char *msg){    perror(msg); exit(1);}void client::quit(char *msg){ int len=0; char *sent = (char *) malloc(sizeof(char) * size); strcpy(sent,"QUIT :"); strcat(sent,msg); strcat(sent, "\n"); len = strlen(sent); if (send(sock, sent, len,0) != len) die("send error");}void client::user(char *nick, char *usr, char *name){   int len=0;   char *cmd = (char *) malloc(sizeof(char) * size);   char *cmd1 = (char *) malloc(sizeof(char) * size);   strcpy(cmd, "NICK "); strcat(cmd,nick );strcat(cmd, " \r\n");   strcpy(cmd1, "USER "); strcat(cmd1,usr); strcat(cmd1," \"test\" \"test\" :"); strcat(cmd1,name);   strcat(cmd1, "\r\n");   len = strlen(cmd);   if (send(sock, cmd, len,0) != len) die("send error");   len = strlen(cmd1);   if (send(sock, cmd1, len,0) != len) die("send error");}int client::fill(char *c, char *d){  int i=0; int j=0;  while (c[i] != ':' && c[i] != '\0') i++;  if (c[i] == ':')   {      i++;      while (c[i] != '\0')         {           d[j] = c[i];           i++; j++;         }    d[j] = '\0';    return 1;   }   return 0;}int client::parse(int msg){   char *buffer = (char *) malloc(sizeof(char) * buf_size);   char *p, *sent = (char *) malloc(sizeof(char) * size);     int bytes=0;   int tmp=0;      int j=0, len=0;    for (;;)    {      bytes = 0;      if ((bytes = recv(sock, buffer, 4095, 0)) < 1) die("failed recieve bytes form server");      if (bytes > 0)        {          if (msg == 1)              for (j=0; j < bytes; j++)                 printf("%c", buffer[j]);         // searching for ping message         tmp = rasti(buffer);         if (tmp)           {            if (fill(buffer, p))              {               strcpy(sent, "PONG :");               strcat(sent, p);               strcat(sent,"\n");               len = strlen(sent);                if (send(sock, sent, len, 0) != len) die("send error");               for (j=0; j < 100; j++)  sent[j] = ' ';               for (j=0; j < size; j++) p[j] = ' ';               }        }        for (j=0; j< 4095; j++) buffer[j] = ' ';    }}}int client::rasti(char *c){   char * p = (char *) malloc(sizeof(char) * 4);   int i=0; int j=0; int t=0;   strcpy(p, "PING");   while (c[i] != '\0')     {        t = 0;        while (c[i] == p[j])           {             t++; j++; i++;           }         if (t== 4)            {            free(p);            return t;            }        j = 0;         i++;     }    return 0;}