patch-2.3.15 linux/net/ipv4/ip_masq_quake.c

• Lines: 325
• Date: Wed Dec 31 16:00:00 1969
• Orig file: v2.3.14/linux/net/ipv4/ip_masq_quake.c
• Orig date: Tue Jun 1 23:25:48 1999

diff -u --recursive --new-file v2.3.14/linux/net/ipv4/ip_masq_quake.c linux/net/ipv4/ip_masq_quake.c
@@ -1,324 +0,0 @@
-/*
- *		IP_MASQ_QUAKE quake masquerading module
- *
- *
- * Version:	@(#)ip_masq_quake.c 0.02   22/02/97
- *
- * Author:	Harald Hoyer mailto:HarryH@Royal.Net
- *		
- *
- * Fixes: 
- *      Harald Hoyer            :       Unofficial Quake Specs found at 
- *                                 http://www.gamers.org/dEngine/quake/spec/ 
- *      Harald Hoyer            :       Check for QUAKE-STRING
- *	Juan Jose Ciarlante	:  litl bits for 2.1
- *      Horst von Brand         :  Add #include <linux/string.h>
- *
- *	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.
- *  
- *  
- */
-
-#include <linux/module.h>
-#include <asm/system.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/skbuff.h>
-#include <linux/in.h>
-#include <linux/ip.h>
-#include <linux/init.h>
-#include <net/protocol.h>
-#include <net/udp.h>
-#include <net/ip_masq.h>
-
-#define DEBUG_CONFIG_IP_MASQ_QUAKE 0
-
-typedef struct
-{ 
-        __u16 type;     // (Little Endian) Type of message.
-	__u16 length;   // (Little Endian) Length of message, header included. 
-	char  message[0];  // The contents of the message.
-} QUAKEHEADER;
-
-struct quake_priv_data {
-	/* Have we seen a client connect message */
-	signed char	cl_connect;
-};
-
-static int
-masq_quake_init_1 (struct ip_masq_app *mapp, struct ip_masq *ms)
-{
-        MOD_INC_USE_COUNT;
-	if ((ms->app_data = kmalloc(sizeof(struct quake_priv_data),
-				    GFP_ATOMIC)) == NULL) 
-		printk(KERN_INFO "Quake: No memory for application data\n");
-	else 
-	{
-		struct quake_priv_data *priv = 
-			(struct quake_priv_data *)ms->app_data;
-		priv->cl_connect = 0;
-	}
-        return 0;
-}
-
-static int
-masq_quake_done_1 (struct ip_masq_app *mapp, struct ip_masq *ms)
-{
-	MOD_DEC_USE_COUNT;
-	if (ms->app_data)
-		kfree_s(ms->app_data, sizeof(struct quake_priv_data));
-	return 0;
-}
-
-int
-masq_quake_in (struct ip_masq_app *mapp, struct ip_masq *ms, struct sk_buff **skb_p, __u32 maddr)
-{
-	struct sk_buff *skb;
-	struct iphdr *iph;
-	struct udphdr *uh;
-	QUAKEHEADER *qh;
-	__u16 udp_port;
-	char *data;
-	unsigned char code;
-	struct quake_priv_data *priv = (struct quake_priv_data *)ms->app_data;
-        
-	if(priv->cl_connect == -1)
-	  return 0;
-
-	skb = *skb_p;
-
-	iph = skb->nh.iph;
-	uh = (struct udphdr *)&(((char *)iph)[iph->ihl*4]);
-
-	/* Check for lenght */
-	if(ntohs(uh->len) < 5)
-	  return 0;
-	
-	qh = (QUAKEHEADER *)&uh[1];
-
-	if(qh->type != 0x0080)
-	  return 0;
-
-	
-	code = qh->message[0];
-
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	  printk("Quake_in: code = %d \n", (int)code);
-#endif
-
-	switch(code) {
-	case 0x01:
-	  /* Connection Request */
-
-	  if(ntohs(qh->length) < 0x0c) {
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	    printk("Quake_in: length < 0xc \n");
-#endif
-	    return 0;
-	  }
-
-	  data = &qh->message[1];
-
-	  /* Check for stomping string */
-	  if(memcmp(data,"QUAKE\0\3",7)) {
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	    printk("Quake_out: memcmp failed \n");
-#endif
-	    return 0;
-	  }
-	  else {
-	    priv->cl_connect = 1;
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	    printk("Quake_out: memcmp ok \n");
-#endif
-	  }
-	  break;
-
-	case 0x81:
-	  /* Accept Connection */
-	  if((ntohs(qh->length) < 0x09) || (priv->cl_connect == 0))
-	    return 0;
-	  data = &qh->message[1];
-
-	  memcpy(&udp_port, data, 2);
-
-	  ms->dport = htons(udp_port);
-
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	  printk("Quake_in: in_rewrote UDP port %d \n", udp_port);
-#endif
-	  priv->cl_connect = -1;
-
-	  break;
-	}
-	 
-	return 0;
-}
-
-int
-masq_quake_out (struct ip_masq_app *mapp, struct ip_masq *ms, struct sk_buff **skb_p, __u32 maddr)
-{
-	struct sk_buff *skb;
-	struct iphdr *iph;
-	struct udphdr *uh;
-	QUAKEHEADER *qh;
-	__u16 udp_port;
-	char *data;
-	unsigned char code;
-	struct ip_masq *n_ms;
-	struct quake_priv_data *priv = (struct quake_priv_data *)ms->app_data;
-
-	if(priv->cl_connect == -1)
-	  return 0;
-        
-	skb = *skb_p;
-
-	iph = skb->nh.iph;
-	uh = (struct udphdr *)&(((char *)iph)[iph->ihl*4]);
-
-	/* Check for lenght */
-	if(ntohs(uh->len) < 5)
-	  return 0;
-	
-	qh = (QUAKEHEADER *)&uh[1];
-
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	  printk("Quake_out: qh->type = %d \n", (int)qh->type);
-#endif
-
-	if(qh->type != 0x0080)
-	  return 0;
-	
-	code = qh->message[0];
-
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	  printk("Quake_out: code = %d \n", (int)code);
-#endif
-
-	switch(code) {
-	case 0x01:
-	  /* Connection Request */
-
-	  if(ntohs(qh->length) < 0x0c) {
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	    printk("Quake_out: length < 0xc \n");
-#endif
-	    return 0;
-	  }
-
-	  data = &qh->message[1];
-
-	  /* Check for stomping string */
-	  if(memcmp(data,"QUAKE\0\3",7)) {
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	    printk("Quake_out: memcmp failed \n");
-#endif
-	    return 0;
-	  }
-	  else {
-	    priv->cl_connect = 1;
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	    printk("Quake_out: memcmp ok \n");
-#endif
-	  }
-	  break;
-
-	case 0x81:
-	  /* Accept Connection */
-	  if((ntohs(qh->length) < 0x09) || (priv->cl_connect == 0))
-	    return 0;
-
-	  data = &qh->message[1];
-
-	  memcpy(&udp_port, data, 2);
-	  
-	  n_ms = ip_masq_new(IPPROTO_UDP,
-			     maddr, 0,
-			     ms->saddr, htons(udp_port),
-			     ms->daddr, ms->dport,
-			     0);
-
-	  if (n_ms==NULL)
-	    return 0;
-
-#if DEBUG_CONFIG_IP_MASQ_QUAKE
-	  printk("Quake_out: out_rewrote UDP port %d -> %d\n",
-		 udp_port, ntohs(n_ms->mport));
-#endif
-	  udp_port = ntohs(n_ms->mport);
-	  memcpy(data, &udp_port, 2);
-
-	  ip_masq_listen(n_ms);
-	  ip_masq_control_add(n_ms, ms);
-	  ip_masq_put(n_ms);
-
-	  break;
-	}
-	 
-	return 0;
-}
-
-struct ip_masq_app ip_masq_quake = {
-        NULL,			/* next */
-	"Quake_26",	       	/* name */
-        0,                      /* type */
-        0,                      /* n_attach */
-        masq_quake_init_1,      /* ip_masq_init_1 */
-        masq_quake_done_1,      /* ip_masq_done_1 */
-        masq_quake_out,         /* pkt_out */
-        masq_quake_in           /* pkt_in */
-};
-struct ip_masq_app ip_masq_quakenew = {
-        NULL,			/* next */
-	"Quake_27",	       	/* name */
-        0,                      /* type */
-        0,                      /* n_attach */
-        masq_quake_init_1,      /* ip_masq_init_1 */
-        masq_quake_done_1,      /* ip_masq_done_1 */
-        masq_quake_out,         /* pkt_out */
-        masq_quake_in           /* pkt_in */
-};
-
-/*
- * 	ip_masq_quake initialization
- */
-
-__initfunc(int ip_masq_quake_init(void))
-{
-        return (register_ip_masq_app(&ip_masq_quake, IPPROTO_UDP, 26000) +
-		register_ip_masq_app(&ip_masq_quakenew, IPPROTO_UDP, 27000));
-}
-
-/*
- * 	ip_masq_quake fin.
- */
-
-int ip_masq_quake_done(void)
-{
-        return (unregister_ip_masq_app(&ip_masq_quake) +
-                unregister_ip_masq_app(&ip_masq_quakenew));
-}
-
-#ifdef MODULE
-EXPORT_NO_SYMBOLS;
-
-int init_module(void)
-{
-        if (ip_masq_quake_init() != 0)
-                return -EIO;
-        return 0;
-}
-
-void cleanup_module(void)
-{
-        if (ip_masq_quake_done() != 0)
-                printk("ip_masq_quake: can't remove module");
-}
-
-#endif /* MODULE */
-
-