wvlan_cs-1.0.1-spycache.patch

mobile ip 在linux下的一种实现

*** wvlan_cs.c	Thu Jan  6 16:31:20 2000
--- wvlan_cs.c.SPYCACHE	Thu Jan  6 16:35:31 2000
***************
*** 48,53 ****
--- 48,57 ----
  #error "Wireless extension v5 or newer required"
  #endif
  #define WIRELESS_SPY		// enable iwspy support
+ /*#define SPYCACHE*/                // use spy cache
+ #ifdef SPYCACHE
+ #include <limits.h>             // for INT_MAX
+ #endif // SPYCACHE
  #undef HISTOGRAM		// disable histogram of signal levels
  #endif
  
***************
*** 81,87 ****
  /********************************************************************
   * MISC
   */
! static char *version = "1.0.1";
  static dev_info_t dev_info = "wvlan_cs";
  static dev_link_t *dev_list = NULL;
  
--- 85,91 ----
  /********************************************************************
   * MISC
   */
! static char *version = "1.0.2";
  static dev_info_t dev_info = "wvlan_cs";
  static dev_link_t *dev_list = NULL;
  
***************
*** 147,152 ****
--- 151,159 ----
  	u_char			spy_address[IW_MAX_SPY][MAC_ADDR_SIZE];
  	struct iw_quality	spy_stat[IW_MAX_SPY];
  #endif
+ #ifdef SPYCACHE
+ 	int                     age[IW_MAX_SPY];// cache entry age
+ #endif
  #ifdef HISTOGRAM
  	int			his_number;
  	u_char			his_range[16];
***************
*** 1494,1499 ****
--- 1501,1509 ----
  	struct net_local *local = (struct net_local *)dev->priv;
  	struct sk_buff *skb;
  	char *p;
+ #ifdef SPYCACHE
+ 	int in_cache = -1;
+ #endif // SPYCACHE
  
  	DEBUG(DEBUG_CALLTRACE, "-> wvlan_rx(%s)\n", dev->name);
  
***************
*** 1543,1548 ****
--- 1553,1561 ----
  #ifdef HISTOGRAM
  		(local->his_number > 0) ||
  #endif
+ #ifdef SPYCACHE
+ 		1 ||
+ #endif // SPYCACHE
  		0 )
  	{
  #if (LINUX_VERSION_CODE >= VERSION(1,3,0))
***************
*** 1570,1581 ****
--- 1583,1639 ----
  #else // Therefore WIRELESS_SPY only !!!
  		memset(&stats, 0, sizeof(stats));
  		// Query only for addresses in our list !
+ 		in_cache = -1;
  		for (i=0; i<local->spy_number; i++)
+ #ifdef SPYCACHE
+ 		{
+ 			if (local->age[i] == INT_MAX)
+ 				local->age[i] = -1;  /* entry to be discarded */
+ 			else 
+ 				local->age[i]++;
+ #endif // SPYCACHE
  			if (!memcmp(srcaddr, local->spy_address[i], MAC_ADDR_SIZE))
  			{
+ #ifdef SPYCACHE
+ 				in_cache = i;
+ #else
  				rc = hcf_get_data(&local->ifb, HFS_Q_INFO, stats, 2);
+ #endif // SPYCACHE
  				break;
  			}
+ #ifdef SPYCACHE
+ 		}
+ 		/* this generates load */
+ 		rc = hcf_get_data(&local->ifb, HFS_Q_INFO, stats, 2);
+ 		/* Insert the entry into the cache. If cache is full, 
+ 		   then replace the oldest entry */
+ 		if (in_cache == -1) {
+ 			printk(KERN_INFO "inserting new entry into the cache\n");
+ 			if (local->spy_number < IW_MAX_SPY) {
+ 				in_cache = local->spy_number++;
+ 				printk(KERN_INFO "cache was not full yet: %d/%d\n",in_cache+1, IW_MAX_SPY);
+ 			} else {
+ 				int max_age = -1;
+ 				printk(KERN_INFO "cache is full\n");
+ 				/* Replace the LRU entry */
+ 				for (i = 0; i < IW_MAX_SPY; i++) {
+ 					if (local->age[i] == -1) { /* very old entry */
+ 						in_cache = i;
+ 						break;
+ 					}
+ 					if (local->age[i] > max_age) {
+ 						max_age = local->age[i];
+ 						in_cache = i;
+ 					}
+ 				}
+ 				printk(KERN_INFO "max_age: %d, index: %d\n", max_age, in_cache);
+ 			}
+ 			memcpy((char *)local->spy_address[in_cache], 
+ 			       (char *)srcaddr, MAC_ADDR_SIZE);
+ 			local->age[in_cache] = 0;
+ 		}
+ #endif // SPYCACHE
+ 		
  #endif
  		DEBUG(DEBUG_NOISY, "%s: hcf_get_data(HFS_Q_INFO) returned 0x%x\n", dev_info, rc);
  		stats[2] = stats[0];
***************
*** 1583,1589 ****
--- 1641,1655 ----
  		stats[1] = max(min(stats[2], 0x8a), 0x2f);
  		stats[2] = stats[0] - stats[1];
  #ifdef WIRELESS_SPY
+ #ifdef SPYCACHE
+ 		/* we know the index already */
+ 		local->spy_stat[in_cache].qual = stats[2];
+ 		local->spy_stat[in_cache].level = stats[0] - 0x95;
+ 		local->spy_stat[in_cache].noise = stats[1] - 0x95;
+ 		local->spy_stat[in_cache].updated = 7;
+ #else
  		wvlan_spy_gather(dev, srcaddr, stats);  
+ #endif // SPYCACHE
  #endif
  #ifdef HISTOGRAM
  		wvlan_his_gather(dev, stats);
***************
*** 1723,1730 ****
  		}
  
  		// HREG_EV_INFO_DROP: WMAC did not have sufficient RAM to build unsollicited frame
! 		if (ev & HREG_EV_INFO_DROP)
! 			printk(KERN_WARNING "%s: WMAC did not have sufficient RAM to build unsollicited frame!\n", dev_info);
  
  		// HREG_EV_INFO: WMAC controller asynchronous information frame
  		if (ev & HREG_EV_INFO)
--- 1789,1796 ----
  		}
  
  		// HREG_EV_INFO_DROP: WMAC did not have sufficient RAM to build unsollicited frame
! //		if (ev & HREG_EV_INFO_DROP)
! //			printk(KERN_WARNING "%s: WMAC did not have sufficient RAM to build unsollicited frame!\n", dev_info);
  
  		// HREG_EV_INFO: WMAC controller asynchronous information frame
  		if (ev & HREG_EV_INFO)