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| author | Michael Brown | 2013-08-29 15:10:16 +0200 |
|---|---|---|
| committer | Michael Brown | 2013-09-03 02:24:15 +0200 |
| commit | d5f69e93887cb9ad505b7ed6394891652f393885 (patch) | |
| tree | e2d499055f10b9536db2a544eea626e722d26679 /src/net/netdevice.c | |
| parent | [netdevice] Increase maximum network-layer address length (diff) | |
| download | ipxe-d5f69e93887cb9ad505b7ed6394891652f393885.tar.gz ipxe-d5f69e93887cb9ad505b7ed6394891652f393885.tar.xz ipxe-d5f69e93887cb9ad505b7ed6394891652f393885.zip | |
[netdevice] Add concept of a network device index
IPv6 link-local socket addresses require some way to specify a local
network device. We cannot simply use a pointer to the network device,
since a struct sockaddr_in6 may be long-lived and has no way to hold a
reference to the network device.
Using a network device index allows a socket address to cleanly refer
to a network device without worrying about whether or not that device
continues to exist.
Signed-off-by: Michael Brown <mcb30@ipxe.org>
Diffstat (limited to 'src/net/netdevice.c')
| -rw-r--r-- | src/net/netdevice.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/src/net/netdevice.c b/src/net/netdevice.c index 5af9c6dc..283632f6 100644 --- a/src/net/netdevice.c +++ b/src/net/netdevice.c @@ -498,10 +498,11 @@ int register_netdev ( struct net_device *netdev ) { uint32_t seed; int rc; - /* Create device name */ + /* Record device index and create device name */ + netdev->index = ifindex++; if ( netdev->name[0] == '\0' ) { snprintf ( netdev->name, sizeof ( netdev->name ), "net%d", - ifindex++ ); + netdev->index ); } /* Set initial link-layer address, if not already set */ |