/***************************************************************************                          module.c  -  description                             -------------------    begin                : Wed Aug 20 2003    copyright            : (C) 2003 by Luke Klein-Berndt    email                : kleinb@nist.gov ***************************************************************************/#include "module.h" struct nf_hook_ops input_filter;struct nf_hook_ops output_filter;extern struct timer_list aodv_timer;aodv_route *g_my_route;  u_int32_t   g_my_ip;  u_int32_t 	g_broadcast_ip;#ifdef LINK_LIMITint		g_link_limit = 15; //signal - noise, needs to be above this to be a neighbor...#endifint32_t			g_score_threshold = HELLO_INTERVAL;u_int64_t   g_last_hello;u_int32_t g_local_subnet;u_int8_t g_aodv_gateway;static struct proc_dir_entry *aodv_dir, *route_table_proc, *neigh_proc;char *use_dev;char *aodv_subnet;char *local_subnet;u_int8_t aodv_gateway;MODULE_PARM(use_dev,"s");MODULE_PARM(aodv_gateway,"i");MODULE_PARM(local_subnet,"s");MODULE_LICENSE("GPL");MODULE_AUTHOR("Luke Klein-Berndt");MODULE_DESCRIPTION("A AODV ad-hoc routing kernel module");char g_aodv_dev[8];/****************************************************	init_module----------------------------------------------------This is called by insmod when things getstarted up!****************************************************/int init_module(void){    int result;    char* local_subnet_netmask_str;    u_int32_t local_subnet_ip=0;    u_int32_t local_subnet_netmask=0;    aodv_route *tmp_route;            if (use_dev==NULL)    {    		printk("You need to specify which device to use, ie:\n");      	printk("    insmod kernel_aod use_dev=wlan0    \n");       	return(-1);        strcpy(g_aodv_dev,"");    }    else        strcpy(g_aodv_dev,use_dev);		g_aodv_gateway = aodv_gateway;    inet_aton("255.255.255.255",&g_broadcast_ip);    printk("\n-=: Kernel AODV v2.2 :=-\nLuke Klein-Berndt\nWireless Communications Technologies Group\nNational Institue of Standards and Technology\n");    printk("---------------------------------------------\n");        //netfilter stuff        // input hook     input_filter.list.next = NULL;    input_filter.list.prev = NULL;    input_filter.hook = input_handler;    input_filter.pf = PF_INET; // IPv4    input_filter.hooknum = NF_IP_PRE_ROUTING;    // output hook     output_filter.list.next = NULL;    output_filter.list.prev = NULL;    output_filter.hook = output_handler;    output_filter.pf = PF_INET; // IPv4    output_filter.hooknum = NF_IP_POST_ROUTING;    init_aodv_route_table();    if (local_subnet==NULL)        g_local_subnet=0;    else    {    		local_subnet_netmask_str = strchr(local_subnet,'/');      	if ( local_subnet_netmask_str)       	{	(*local_subnet_netmask_str)='\0';          local_subnet_netmask_str++;          printk("Adding Localy Routed Subnet %s/%s to the routing table...\n",local_subnet, local_subnet_netmask_str);	        inet_aton(local_subnet, &local_subnet_ip);	        inet_aton(local_subnet_netmask_str, &local_subnet_netmask);	        tmp_route = create_aodv_route(local_subnet_ip);	        tmp_route->route_valid = TRUE;	        tmp_route->route_seq_valid = TRUE;	        tmp_route->netmask = local_subnet_netmask;	        tmp_route->self_route = TRUE;	        tmp_route->metric = 1;	        tmp_route->seq = 1;	        tmp_route->rreq_id = 1;	      }    }            init_task_queue();    init_timer_queue();    init_flood_id_queue();    init_aodv_neigh_list();    init_packet_queue();    		if (!init_aodv_dev())	{   	del_timer(&aodv_timer);    printk("Kernel_AODV: Removed timer...\n");    printk("Kernel_AODV: Killed router thread...\n");		cleanup_packet_queue();    cleanup_task_queue();    cleanup_flood_id_queue();		printk("Kernel_AODV: Cleaned up AODV Queues...\n");    cleanup_aodv_route_table();	  return(-1);	}    #ifdef AODV_SIGNAL     init_iw_sock();    printk("Kernel_AODV: A Maximum of: %d neighboring nodes' signals can be monitored\n",IW_MAX_SPY);     #endifstartup_aodv();    result = nf_register_hook(&output_filter);    result = nf_register_hook(&input_filter);    #ifdef MESSAGES    printk("Kernel_AODV: Principal IP address - %s\n",inet_ntoa(g_my_ip));    if (g_aodv_gateway)    {    	printk("Kernel_AODV: Set as AODV Gateway\n");    }#endif    insert_timer( TASK_CLEANUP, HELLO_INTERVAL, g_my_ip);    update_timer_queue();    aodv_dir = proc_mkdir("aodv",NULL);    aodv_dir->owner = THIS_MODULE;        route_table_proc=create_proc_read_entry("aodv/routes", 0, NULL, read_route_table_proc, NULL);    route_table_proc->owner=THIS_MODULE;    route_table_proc=create_proc_read_entry("aodv/neigh", 0, NULL, read_neigh_proc, NULL);    route_table_proc->owner=THIS_MODULE;      route_table_proc=create_proc_read_entry("aodv/timers", 0, NULL, read_timer_queue_proc, NULL);    route_table_proc->owner=THIS_MODULE;    route_table_proc=create_proc_read_entry("aodv/flood_id", 0, NULL, read_flood_id_proc, NULL);    route_table_proc->owner=THIS_MODULE;    return 0;}/****************************************************   cleanup_module----------------------------------------------------cleans up the module. called by rmmod****************************************************/void cleanup_module(void){      remove_proc_entry("aodv/routes",NULL);      remove_proc_entry("aodv/flood_id",NULL);      remove_proc_entry("aodv/timers",NULL);      remove_proc_entry("aodv/neigh",NULL);	    remove_proc_entry("aodv", NULL);      printk("Kernel_AODV: Shutting down...\n");    nf_unregister_hook(&input_filter);    nf_unregister_hook(&output_filter);      printk("Kernel_AODV: Unregistered NetFilter hooks...\n");    close_sock();#ifdef AODV_SIGNAL    close_iw_sock();#endif    printk("Kernel_AODV: Closed sockets...\n");   	del_timer(&aodv_timer);    printk("Kernel_AODV: Removed timer...\n");    kill_aodv();    printk("Kernel_AODV: Killed router thread...\n");    cleanup_task_queue();    cleanup_flood_id_queue();    cleanup_packet_queue();		printk("Kernel_AODV: Cleaned up AODV Queues...\n");    cleanup_aodv_route_table();    printk("Kernel_AODV: Cleaned up Route Table...\n");    printk("Kernel_AODV: Shutdown complete!\n");}