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Never attempt to route the broadcast address.

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This commit is contained in:
Michael Brown 2007-07-03 13:55:45 +01:00
parent adb3dd03e5
commit 5b52630a9c
1 changed files with 8 additions and 0 deletions
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8
src/net/ipv4.c
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@ -141,12 +141,20 @@ void del_ipv4_address ( struct net_device *netdev ) {
* @v dest Final destination address
* @ret dest Next hop destination address
* @ret miniroute Routing table entry to use, or NULL if no route
*
* If the route requires use of a gateway, the next hop destination
* address will be overwritten with the gateway address.
*/
static struct ipv4_miniroute * ipv4_route ( struct in_addr *dest ) {
struct ipv4_miniroute *miniroute;
int local;
int has_gw;
/* Never attempt to route the broadcast address */
if ( dest->s_addr == INADDR_BROADCAST )
return NULL;
/* Find first usable route in routing table */
list_for_each_entry ( miniroute, &ipv4_miniroutes, list ) {
local = ( ( ( dest->s_addr ^ miniroute->address.s_addr )
& miniroute->netmask.s_addr ) == 0 );