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UDP should use dev=NULL if the address in the lookup is INADDR_ANY

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This commit is contained in:
Gregory Nutt 2015-05-29 14:56:44 -06:00
parent 75346a4f0d
commit 34509a9ad5
1 changed files with 28 additions and 0 deletions
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28
net/udp/udp_finddev.c
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@ -79,6 +79,19 @@ FAR struct net_driver_s *udp_find_ipv4_device(FAR struct udp_conn_s *conn,
#ifdef CONFIG_NETDEV_MULTINIC #ifdef CONFIG_NETDEV_MULTINIC
FAR struct net_driver_s *dev; FAR struct net_driver_s *dev;
/* Return NULL if the address is INADDR_ANY. In this case, there is
* there may be multiple devices that can provide data so the exceptional
* events from any particular device are not important.
*
* Of course, it would be a problem if this is the remote address of
* sendto().
*/
if (ipv4addr == INADDR_ANY)
{
return NULL;
}
/* There are multiple network devices. We need to select the device that /* There are multiple network devices. We need to select the device that
* is going to route the UDP packet based on the provided IP address. * is going to route the UDP packet based on the provided IP address.
*/ */
@ -86,6 +99,8 @@ FAR struct net_driver_s *udp_find_ipv4_device(FAR struct udp_conn_s *conn,
return netdev_findby_ipv4addr(conn->u.ipv4.laddr, ipv4addr); return netdev_findby_ipv4addr(conn->u.ipv4.laddr, ipv4addr);
#else #else
/* Return NULL if the address is IN6ADDR_ANY */
/* There is only a single network device... the one at the head of the /* There is only a single network device... the one at the head of the
* g_netdevices list. * g_netdevices list.
*/ */
@ -116,6 +131,19 @@ FAR struct net_driver_s *udp_find_ipv6_device(FAR struct udp_conn_s *conn,
#ifdef CONFIG_NETDEV_MULTINIC #ifdef CONFIG_NETDEV_MULTINIC
FAR struct net_driver_s *dev; FAR struct net_driver_s *dev;
/* Return NULL if the address is IN6ADDR_ANY. In this case, there is
* there may be multiple devices that can provide data so the exceptional
* events from any particular device are not important.
*
* Of course, it would be a problem if this is the remote address of
* sendto().
*/
if (net_ipv4addr_cmp(conn->u.ipv4.laddr, g_ipv4_allzeroaddr))
{
return NULL;
}
/* There are multiple network devices. We need to select the device that /* There are multiple network devices. We need to select the device that
* is going to route the UDP packet based on the provided IP address. * is going to route the UDP packet based on the provided IP address.
*/ */