C++ (Cpp) lock_rtable_rd Examples

Example #1

File: or_main.c Project: carriercomm/CCDN-Router

/* Given a destination ip address:
 *  - find interface the packet would be shipped through
 *  - return this interface's ip address as the src ip address
 */
uint32_t find_srcip(uint32_t dest) {

        struct sr_instance* sr = sr_get_global_instance(0);
        router_state* rs = (router_state*)sr->interface_subsystem;
        iface_entry* iface_struct;

        char *iface = 0;
        struct in_addr dst;
        struct in_addr src;
        uint32_t srcip;

    	iface = calloc(32, sizeof(char));
        dst.s_addr = dest;
        src.s_addr = 0;


        lock_if_list_rd(rs);
        lock_rtable_rd(rs);

        if(get_next_hop(&src, iface, 32, rs, &dst)) {
            srcip = 0;
        }
        else {
            iface_struct = get_iface(rs, iface);
            assert(iface_struct);
            srcip = iface_struct->ip;
        }

            unlock_rtable(rs);
            unlock_if_list(rs);

        return srcip;
}

Example #2

File: or_arp.c Project: SEREGIZ/Accelerators

void* arp_thread(void *param) {
	assert(param);
	struct sr_instance *sr = (struct sr_instance *)param;
	router_state *rs = get_router_state(sr);

	while (1) {
		lock_arp_cache_wr(rs);
		expire_arp_cache(sr);
		unlock_arp_cache(rs);

		lock_arp_cache_rd(rs);
		lock_arp_queue_wr(rs);
		lock_if_list_rd(rs);
		lock_rtable_rd(rs); /* because we may send an icmp packet back, requiring get next hop */

		process_arp_queue(sr);

		unlock_rtable(rs);
		unlock_if_list(rs);
		unlock_arp_queue(rs);
		unlock_arp_cache(rs);

		sleep(1);
	}
}