1 files changed, 318 insertions, 0 deletions
diff --git a/QW/client/net_udp.c b/QW/client/net_udp.c
new file mode 100644
index 0000000..758b9bc
--- /dev/null
+++ b/QW/client/net_udp.c
@@ -0,0 +1,318 @@
+/*
+Copyright (C) 1996-1997 Id Software, Inc.
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  
+
+See the GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+// net_main.c
+
+#include "quakedef.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netdb.h>
+#include <sys/param.h>
+#include <sys/ioctl.h>
+#include <sys/uio.h>
+#include <arpa/inet.h>
+#include <errno.h>
+
+#if defined(sun)
+#include <unistd.h>
+#endif
+
+#ifdef sun
+#include <sys/filio.h>
+#endif
+
+#ifdef NeXT
+#include <libc.h>
+#endif
+
+netadr_t	net_local_adr;
+
+netadr_t	net_from;
+sizebuf_t	net_message;
+int			net_socket;			// non blocking, for receives
+int			net_send_socket;	// blocking, for sends
+
+#define	MAX_UDP_PACKET	8192
+byte		net_message_buffer[MAX_UDP_PACKET];
+
+int gethostname (char *, int);
+int close (int);
+
+//=============================================================================
+
+void NetadrToSockadr (netadr_t *a, struct sockaddr_in *s)
+{
+	memset (s, 0, sizeof(*s));
+	s->sin_family = AF_INET;
+
+	*(int *)&s->sin_addr = *(int *)&a->ip;
+	s->sin_port = a->port;
+}
+
+void SockadrToNetadr (struct sockaddr_in *s, netadr_t *a)
+{
+	*(int *)&a->ip = *(int *)&s->sin_addr;
+	a->port = s->sin_port;
+}
+
+qboolean	NET_CompareBaseAdr (netadr_t a, netadr_t b)
+{
+	if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3])
+		return true;
+	return false;
+}
+
+
+qboolean	NET_CompareAdr (netadr_t a, netadr_t b)
+{
+	if (a.ip[0] == b.ip[0] && a.ip[1] == b.ip[1] && a.ip[2] == b.ip[2] && a.ip[3] == b.ip[3] && a.port == b.port)
+		return true;
+	return false;
+}
+
+char	*NET_AdrToString (netadr_t a)
+{
+	static	char	s[64];
+	
+	sprintf (s, "%i.%i.%i.%i:%i", a.ip[0], a.ip[1], a.ip[2], a.ip[3], ntohs(a.port));
+
+	return s;
+}
+
+char	*NET_BaseAdrToString (netadr_t a)
+{
+	static	char	s[64];
+	
+	sprintf (s, "%i.%i.%i.%i", a.ip[0], a.ip[1], a.ip[2], a.ip[3]);
+
+	return s;
+}
+
+/*
+=============
+NET_StringToAdr
+
+idnewt
+idnewt:28000
+192.246.40.70
+192.246.40.70:28000
+=============
+*/
+qboolean	NET_StringToAdr (char *s, netadr_t *a)
+{
+	struct hostent	*h;
+	struct sockaddr_in sadr;
+	char	*colon;
+	char	copy[128];
+	
+	
+	memset (&sadr, 0, sizeof(sadr));
+	sadr.sin_family = AF_INET;
+	
+	sadr.sin_port = 0;
+
+	strcpy (copy, s);
+	// strip off a trailing :port if present
+	for (colon = copy ; *colon ; colon++)
+		if (*colon == ':')
+		{
+			*colon = 0;
+			sadr.sin_port = htons(atoi(colon+1));	
+		}
+	
+	if (copy[0] >= '0' && copy[0] <= '9')
+	{
+		*(int *)&sadr.sin_addr = inet_addr(copy);
+	}
+	else
+	{
+		if (! (h = gethostbyname(copy)) )
+			return 0;
+		*(int *)&sadr.sin_addr = *(int *)h->h_addr_list[0];
+	}
+	
+	SockadrToNetadr (&sadr, a);
+
+	return true;
+}
+
+// Returns true if we can't bind the address locally--in other words, 
+// the IP is NOT one of our interfaces.
+qboolean NET_IsClientLegal(netadr_t *adr)
+{
+	struct sockaddr_in sadr;
+	int newsocket;
+
+#if 0
+	if (adr->ip[0] == 127)
+		return false; // no local connections period
+
+	NetadrToSockadr (adr, &sadr);
+
+	if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
+		Sys_Error ("NET_IsClientLegal: socket:", strerror(errno));
+
+	sadr.sin_port = 0;
+
+	if( bind (newsocket, (void *)&sadr, sizeof(sadr)) == -1) 
+	{
+		// It is not a local address
+		close(newsocket);
+		return true;
+	}
+	close(newsocket);
+	return false;
+#else
+	return true;
+#endif
+}
+
+
+//=============================================================================
+
+qboolean NET_GetPacket (void)
+{
+	int 	ret;
+	struct sockaddr_in	from;
+	int		fromlen;
+
+	fromlen = sizeof(from);
+	ret = recvfrom (net_socket, net_message_buffer, sizeof(net_message_buffer), 0, (struct sockaddr *)&from, &fromlen);
+	if (ret == -1) {
+		if (errno == EWOULDBLOCK)
+			return false;
+		if (errno == ECONNREFUSED)
+			return false;
+		Sys_Printf ("NET_GetPacket: %s\n", strerror(errno));
+		return false;
+	}
+
+	net_message.cursize = ret;
+	SockadrToNetadr (&from, &net_from);
+
+	return ret;
+}
+
+//=============================================================================
+
+void NET_SendPacket (int length, void *data, netadr_t to)
+{
+	int ret;
+	struct sockaddr_in	addr;
+
+	NetadrToSockadr (&to, &addr);
+
+	ret = sendto (net_socket, data, length, 0, (struct sockaddr *)&addr, sizeof(addr) );
+	if (ret == -1) {
+		if (errno == EWOULDBLOCK)
+			return;
+		if (errno == ECONNREFUSED)
+			return;
+		Sys_Printf ("NET_SendPacket: %s\n", strerror(errno));
+	}
+}
+
+//=============================================================================
+
+int UDP_OpenSocket (int port)
+{
+	int newsocket;
+	struct sockaddr_in address;
+	qboolean _true = true;
+	int i;
+
+	if ((newsocket = socket (PF_INET, SOCK_DGRAM, IPPROTO_UDP)) == -1)
+		Sys_Error ("UDP_OpenSocket: socket:", strerror(errno));
+	if (ioctl (newsocket, FIONBIO, (char *)&_true) == -1)
+		Sys_Error ("UDP_OpenSocket: ioctl FIONBIO:", strerror(errno));
+	address.sin_family = AF_INET;
+//ZOID -- check for interface binding option
+	if ((i = COM_CheckParm("-ip")) != 0 && i < com_argc) {
+		address.sin_addr.s_addr = inet_addr(com_argv[i+1]);
+		Con_Printf("Binding to IP Interface Address of %s\n",
+				inet_ntoa(address.sin_addr));
+	} else
+		address.sin_addr.s_addr = INADDR_ANY;
+	if (port == PORT_ANY)
+		address.sin_port = 0;
+	else
+		address.sin_port = htons((short)port);
+	if( bind (newsocket, (void *)&address, sizeof(address)) == -1)
+		Sys_Error ("UDP_OpenSocket: bind: %s", strerror(errno));
+
+	return newsocket;
+}
+
+void NET_GetLocalAddress (void)
+{
+	char	buff[MAXHOSTNAMELEN];
+	struct sockaddr_in	address;
+	int		namelen;
+
+	gethostname(buff, MAXHOSTNAMELEN);
+	buff[MAXHOSTNAMELEN-1] = 0;
+
+	NET_StringToAdr (buff, &net_local_adr);
+
+	namelen = sizeof(address);
+	if (getsockname (net_socket, (struct sockaddr *)&address, &namelen) == -1)
+		Sys_Error ("NET_Init: getsockname:", strerror(errno));
+	net_local_adr.port = address.sin_port;
+
+	Con_Printf("IP address %s\n", NET_AdrToString (net_local_adr) );
+}
+
+/*
+====================
+NET_Init
+====================
+*/
+void NET_Init (int port)
+{
+	//
+	// open the single socket to be used for all communications
+	//
+	net_socket = UDP_OpenSocket (port);
+
+	//
+	// init the message buffer
+	//
+	net_message.maxsize = sizeof(net_message_buffer);
+	net_message.data = net_message_buffer;
+
+	//
+	// determine my name & address
+	//
+	NET_GetLocalAddress ();
+
+	Con_Printf("UDP Initialized\n");
+}
+
+/*
+====================
+NET_Shutdown
+====================
+*/
+void	NET_Shutdown (void)
+{
+	close (net_socket);
+}
+