/***************************************************************************                          rrep.c  -  description                             -------------------    begin                : Wed Aug 6 2003    copyright            : (C) 2003 by Luke Klein-Berndt    email                : kleinb@nist.gov ***************************************************************************/#include "rrep.h"void convert_rrep_to_host(rrep * tmp_rrep){    tmp_rrep->dst_seq = ntohl(tmp_rrep->dst_seq);    tmp_rrep->lifetime = ntohl(tmp_rrep->lifetime);}void convert_rrep_to_network(rrep * tmp_rrep){    tmp_rrep->dst_seq = htonl(tmp_rrep->dst_seq);    tmp_rrep->lifetime = htonl(tmp_rrep->lifetime);}int check_rrep(rrep * tmp_rrep, task * tmp_packet){    char dst_ip[16];    char src_ip[16];    u_int32_t tmp;    u_int64_t timer;    if (tmp_rrep->src_ip == tmp_rrep->dst_ip)    {  		        //its a hello messages! HELLO WORLD!        recv_hello(tmp_rrep, tmp_packet);        return 0;    }    if (!valid_aodv_neigh(tmp_packet->src_ip))    {        printk(KERN_INFO "AODV: Not processing RREP from %s, not a valid neighbor\n", inet_ntoa(tmp_packet->src_ip));        return 0;    }    delete_timer(tmp_rrep->dst_ip, TASK_RESEND_RREQ);    update_timer_queue();    strcpy(src_ip, inet_ntoa(tmp_packet->src_ip));    strcpy(dst_ip, inet_ntoa(tmp_rrep->dst_ip));    printk(KERN_INFO "AODV: recv a route to: %s next hop: %s \n", dst_ip, src_ip);    return 1;}int recv_rrep(task * tmp_packet){    aodv_route *send_route;    aodv_route *recv_route;    char dst_ip[16];    char src_ip[16];    rrep *tmp_rrep;    tmp_rrep = tmp_packet->data;    convert_rrep_to_host(tmp_rrep);    if (!check_rrep(tmp_rrep, tmp_packet))    {        return 0;    }    tmp_rrep->metric++;    update_aodv_route(tmp_rrep->dst_ip, tmp_packet->src_ip, tmp_rrep->metric, tmp_rrep->dst_seq, tmp_packet->dev);    send_route = find_aodv_route(tmp_rrep->src_ip);	        if (!send_route)    {        strcpy(src_ip, inet_ntoa(tmp_rrep->src_ip));        strcpy(dst_ip, inet_ntoa(tmp_rrep->dst_ip));        printk(KERN_WARNING "AODV: No reverse-route for RREP from: %s to: %s", dst_ip, src_ip);        return 0;    }    if (!send_route->self_route)    {        strcpy(src_ip, inet_ntoa(tmp_rrep->src_ip));        strcpy(dst_ip, inet_ntoa(tmp_rrep->dst_ip));        printk(KERN_INFO "AODV: Forwarding a route to: %s from node: %s \n", dst_ip, src_ip);        convert_rrep_to_network(tmp_rrep);        send_message(send_route->next_hop, NET_DIAMETER, tmp_rrep, sizeof(rrep), NULL);    }    /* If I'm not the destination of the RREP I forward it */    return 0;}int send_rrep(aodv_route * src_route, aodv_route * dst_route, rreq * tmp_rreq){    rrep *tmp_rrep;		if ((tmp_rrep = (rrep *) kmalloc(sizeof(rrep), GFP_ATOMIC)) == NULL)    {        printk(KERN_WARNING "AODV: Can't allocate new rreq\n");        return 0;    }    tmp_rrep->type = RREP_MESSAGE;    tmp_rrep->reserved1 = 0;    tmp_rrep->reserved2 = 0;    tmp_rrep->src_ip = src_route->ip;    tmp_rrep->dst_ip = dst_route->ip;    tmp_rrep->dst_seq = htonl(dst_route->seq);    tmp_rrep->metric = dst_route->metric;    if (dst_route->self_route)    {        tmp_rrep->lifetime = htonl(MY_ROUTE_TIMEOUT);    } else    {        tmp_rrep->lifetime = htonl(dst_route->lifetime - getcurrtime());    }    send_message(src_route->next_hop, NET_DIAMETER, tmp_rrep, sizeof(rrep) , NULL);    kfree(tmp_rrep);}int gen_rrep(u_int32_t src_ip, u_int32_t dst_ip, rreq *tmp_rreq){    rrep tmp_rrep;    aodv_route *src_route;    aodv_route *dst_route;    //struct interface_list_entry *tmp_interface=NULL;    char src_ip_str[16];    char dst_ip_str[16];    /* Get the source and destination IP address from the RREQ */    if (!(src_route = find_aodv_route(src_ip)))    {        printk(KERN_WARNING "AODV: RREP  No route to Source! src: %s\n", inet_ntoa(src_ip));        return -EHOSTUNREACH;    }    if (!(dst_route = find_aodv_route(dst_ip)))    {        printk(KERN_WARNING "AODV: RREP  No route to Dest! dst: %s\n", inet_ntoa(dst_ip));        return -EHOSTUNREACH;    }    send_rrep(src_route, dst_route, tmp_rreq);    return 0;}