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netdev_findby_ipv[4|6]addr return netdev_default() as last resort but don't return loopback device if another network device is in the UP state.

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This commit is contained in:
Xiang Xiao
2018-08-26 14:40:47 -06:00
committed by Gregory Nutt
parent da1a323f34
commit fd1405d976
2 changed files with 19 additions and 30 deletions
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net/netdev/netdev_default.c
+11 -6
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@@ -1,7 +1,7 @@
/****************************************************************************
* net/netdev/netdev_default.c
*
* Copyright (C) 2014-2015 Gregory Nutt. All rights reserved.
* Copyright (C) 2014-2015, 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
@@ -72,6 +72,7 @@
FAR struct net_driver_s *netdev_default(void)
{
FAR struct net_driver_s *ret = NULL;
FAR struct net_driver_s *dev;
/* Examine each registered network device */
@@ -83,17 +84,21 @@ FAR struct net_driver_s *netdev_default(void)
if ((dev->d_flags & IFF_UP) != 0)
{
/* Return a reference to the first device we find that is in the UP
* state.
/* Return a reference to the first device that we find in the UP
* state (but not the loopback device unless it is the only
* device).
*/
net_unlock();
return dev;
ret = dev;
if (dev->d_lltype != NET_LL_LOOPBACK)
{
break;
}
}
}
net_unlock();
return NULL;
return ret;
}
#endif /* CONFIG_NET */