int
handle_client(int socket) {
// Get the client registered to the socket
Client *client = search_client(socket);
if (client == NULL) {
perror("Unregistered client socket found! This is not in the list!");
return EXIT_FAILURE;
}
// Read the complete input of the client
int res = read_from_client(client);
if (res != EXIT_SUCCESS)
return res;
// Try to extract a single message from the buffer
StringBuffer *msg = extract_message(client);
if (msg == NULL) {
return EXIT_SUCCESS;
}
if (is_command(client, msg) == EXIT_SUCCESS) {
handle_command(client, msg);
}
else {
broadcast_message(client, msg);
}
StringBuffer_free(msg);
return EXIT_SUCCESS;
}
int mesg_from_client (int filedes, FILE *logfp, struct cinfo **phead)
{
struct c_mesg msg;
int nbytes;
char notify_toolong[] = "! SYSTEM NOTIFICATION: name too long! Nickname set yet truncated to 255 characters.\n";
char notify_noname[] = "! SYSTEM NOTIFICATIOM: no name part found in your message! failed to change nickname!\n";
char notify_succeed[] = "! SYSTEM NOTIFICATION: succeed changing nickname!:)\n";
int rvalue;
struct cinfo *node;
char broadcast[MAXMSG + MAXNAME + MAXNAME];
nbytes = read ( filedes, &msg, sizeof(msg) );
if (nbytes < 0)
{
/* Read error. */
perror ("read_from_client");
exit (EXIT_FAILURE);
}
else if (nbytes == 0)
/* End-of-file. */
return -1;
else
{
if( msg.type == 1 ) // change nickname of client from socket fd == filedes
{
rvalue = change_name(filedes, msg.mesg, phead, logfp);
if( rvalue == 1 ) //truncated
write(filedes, notify_toolong, sizeof(notify_toolong) );
else if( rvalue == -1)
write(filedes, notify_noname, sizeof(notify_noname) );
else if( rvalue == 0 )
write(filedes, notify_succeed, sizeof(notify_succeed) );
else
return -1;
return 0;
}
else if(msg.type == 2) // send message to all clients except socket fd == filedes
{
if( search_client( *phead, &node, filedes) == -1 )
{
fprintf(logfp, "\nERROR: cannot find fd %d in client list, therefore failed to broadcast\n", filedes);
return -1;
}
sprintf(broadcast,"%d(%s):\n\t%s\n", node->id, node->nameset? node->nickname:" ", msg.mesg );
fprintf(logfp,"\nMSG from %d(%s), fd=%d:\n\t%s\n", node->id,
node->nameset ? node->nickname : " ", node->sockfd, msg.mesg );
node = *phead;
while( node != NULL )
{
if( node->sockfd != filedes )
write( node->sockfd, broadcast, MAXMSG+2*MAXNAME );
node = node->next;
}
}
else if(msg.type == 3 ) //client want to leave
{
return 1;
}
return 0;
}
}