client.c

Libnet is a cross-platform library aimed at game developers. It has an abstract high level API, whic

/*----------------------------------------------------------------
 * rdmchat/client.c - RDM chat client demo for libnet
 *----------------------------------------------------------------
 *  libnet is (c) Copyright Chad Catlett and George Foot 1997-1999
 *
 *  Please look in `docs' for details, documentation and
 *  distribution conditions.
 */

#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libnet.h>

#include "_coniox.h"
#include "chat.h"


#define SIZE 1000


NET_CONN *conn;
char buffer[SIZE];
int netdriver = 0;


void list_drivers (NET_DRIVERNAME *drvs, char *title)
{
	printf("\nDriver list: %s\n",title);
	while (drvs->name) {
		printf("\t%d\t%s\n",drvs->num,drvs->name);
		drvs++;
	}
	printf ("\n");
}


int in_list (NET_DRIVERNAME *drvs, int x)
{
	while (drvs->name) {
		if (x==drvs->num) return 1;
		drvs++;
	}
	return 0;
}


void get_driver (void)
{
	char buffer[20];
	int choice;
	NET_DRIVERNAME *drivers;
	NET_DRIVERLIST avail;

	printf ("Detecting available drivers...\n");
	avail = net_detectdrivers (net_drivers_all);
	printf ("Getting detected driver names...\n");
	drivers = net_getdrivernames (avail);

	do {
		list_drivers (drivers, "Available drivers");

		printf ("Please choose a driver from the above list.\n");
		fgets (buffer,10,stdin);
		choice = atoi (buffer);
	} while (!in_list (drivers, choice));
	free (drivers);

	netdriver = choice;
}


int callback (void)
{
	printf (".");
	fflush (stdout);
	return 0;
}

void init (void)
{
	char nick[1024], addr[1024];
	NET_DRIVERLIST drv;
	int x;

	drv = net_driverlist_create();
	net_driverlist_clear (drv);
	net_driverlist_add (drv, netdriver);

	if (!net_initdrivers (drv)) {
		printf("Error initialising driver.\n");
		exit (1);
	}

	printf ("Enter target address: ");
	fgets (addr, 1024, stdin);
	while (strchr(addr,'\n')) *strchr(addr,'\n')=0;

	printf ("Enter nickname: ");
	fgets (nick, 10, stdin);
	while (strchr(nick,'\n')) *strchr(nick,'\n')=0;

	if (!(conn = net_openconn (netdriver, NULL))) {
		printf ("Unable to open conn.\n");
		exit (2);
	}

	printf ("Connecting to %s ", addr);
	fflush (stdout);
	
	x = net_connect_wait_cb (conn, addr, callback);
	if (x) {
		if (x > 0)
			puts (" -- user aborted.");
		else
			puts (" -- error occured.");
		net_closeconn (conn);
		exit (3);
	}
	puts (" -- connected.");
	
	{
		char buffer[100];
		sprintf (buffer, "/nick %s", nick);
		net_send_rdm (conn, buffer, strlen (buffer));
	}
}


void erase_buffer (void)
{
	conio_gotoxy (1,25);
	conio_clreol();
}


void show_buffer (char *buffer, int pos)
{
	char *start = buffer+pos-75;
	if (start<buffer) start = buffer;
	conio_gotoxy (1,25);
	conio_textcolor (14);
	conio_cputs (start);
	conio_clreol();
}


void write_to_window (char *buf, int col)
{
	erase_buffer();
	conio_gotoxy (1,24);
	conio_textcolor (col);
	conio_cputs (buf);
	conio_cputs ("\n");
	conio_cputs ("\n");
}


void do_client (void)
{
	char obuffer[1024] = {0}, ibuffer[1024] = {0};
	int obuffer_offset = 0, stop = 0;

	fflush (stdout);  /* get anything out of the buffer */
	conio_init();
	sprintf (ibuffer, "*** connected to %s", net_getpeer (conn));
	write_to_window (ibuffer, 9);
	show_buffer (obuffer, obuffer_offset);

	do {

		if (net_query_rdm (conn)) {
			int col = 10;
			int x = net_receive_rdm (conn, ibuffer, 1024);

			if (x<0)
				strcpy (ibuffer, "!!! (local) error reading packet");
			else
				ibuffer[x] = 0;

			switch (ibuffer[0]) {
				case '*': col = 9; break;
				case '+':
				case '-':
				case '=': col = 11; break;
				case '!': col = 12; break;
			}

			write_to_window (ibuffer, col);
			show_buffer (obuffer, obuffer_offset);

			if (!strcmp (ibuffer, "*** go away")) stop = 1;
			if (!strcmp (ibuffer, "*** server shutting down")) stop = 1;
		}

		if (conio_kbhit()) {
			char ch = conio_getch();
			switch (ch) {
			    	case 7:
				case 8:
					if (obuffer_offset) obuffer[--obuffer_offset] = 0;
					show_buffer (obuffer, obuffer_offset);
					break;
				case 13:
					net_send_rdm (conn, obuffer, strlen (obuffer));
					obuffer[obuffer_offset = 0] = 0;
					show_buffer (obuffer, obuffer_offset);
					break;
				default:
					obuffer[obuffer_offset] = ch;
					obuffer[++obuffer_offset] = 0;
					show_buffer (obuffer, obuffer_offset);
					break;
			}
		}

	} while (!stop);

	erase_buffer();
	conio_exit();
}


int main (void)
{
	printf ("Libnet RDM chat client version %d.%d\n", VER_MAJOR, VER_MINOR);
	printf ("built at " __TIME__ " on " __DATE__ "\n");
	printf ("\n");

	net_init();
	net_loadconfig (NULL);

	get_driver();
	init();

	do_client();

	return 0;
}
END_OF_MAIN();