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| author | Gregory Nutt <gnutt@nuttx.org> | 2014-03-20 17:27:59 -0600 |
|---|---|---|
| committer | Gregory Nutt <gnutt@nuttx.org> | 2014-03-20 17:27:59 -0600 |
| commit | fb240b8d5d01ea6587eb7355c33c9a96aa18942f (patch) | |
| tree | f18d3cf6407bee0bf9947de69616b10c75762443 /nuttx/net/netdev_findbyaddr.c | |
| parent | 66f2da8de179bf8be875830ffaaba09232bd7421 (diff) | |
| download | nuttx-fb240b8d5d01ea6587eb7355c33c9a96aa18942f.tar.gz nuttx-fb240b8d5d01ea6587eb7355c33c9a96aa18942f.tar.bz2 nuttx-fb240b8d5d01ea6587eb7355c33c9a96aa18942f.zip | |
net/netdev_findbyaddr.c: Skip network devices that are in the down state. They have no meaning address
Diffstat (limited to 'nuttx/net/netdev_findbyaddr.c')
| -rw-r--r-- | nuttx/net/netdev_findbyaddr.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/nuttx/net/netdev_findbyaddr.c b/nuttx/net/netdev_findbyaddr.c index 8ca1ae3b2..dbfea28cc 100644 --- a/nuttx/net/netdev_findbyaddr.c +++ b/nuttx/net/netdev_findbyaddr.c @@ -1,7 +1,7 @@ /**************************************************************************** * net/netdev_findbyaddr.c * - * Copyright (C) 2007-2009 Gregory Nutt. All rights reserved. + * Copyright (C) 2007-2009, 2014 Gregory Nutt. All rights reserved. * Author: Gregory Nutt <gnutt@nuttx.org> * * Redistribution and use in source and binary forms, with or without @@ -55,7 +55,7 @@ ****************************************************************************/ /**************************************************************************** - * Priviate Types + * Private Types ****************************************************************************/ /**************************************************************************** @@ -79,7 +79,8 @@ * * Description: * Find a previously registered network device by matching a local address - * with the subnet served by the device + * with the subnet served by the device. Only "up" devices are considered + * (since a "down" device has no meaningful address). * * Parameters: * addr - Pointer to the remote address of a connection @@ -95,17 +96,36 @@ static FAR struct uip_driver_s *netdev_finddevice(const uip_ipaddr_t addr) { struct uip_driver_s *dev; + uint8_t iff; + + /* Examine each registered network device */ netdev_semtake(); for (dev = g_netdevices; dev; dev = dev->flink) { - if (uip_ipaddr_maskcmp(dev->d_ipaddr, addr, dev->d_netmask)) + /* Get the interface flags */ + + if (uip_getifstatus(dev->d_ifname, &iff) == OK) { - netdev_semgive(); - return dev; + /* Is the interface in the "up" state? */ + + if ((iff & IFF_UP) != 0) + { + /* Yes.. check for an address match (under the netmask) */ + + if (uip_ipaddr_maskcmp(dev->d_ipaddr, addr, dev->d_netmask)) + { + /* Its a match */ + + netdev_semgive(); + return dev; + } + } } } + /* No device with the matching address found */ + netdev_semgive(); return NULL; } |