diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2015-03-03 17:11:16 -0600 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-03-04 00:23:23 -0500 |
| commit | 4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62 (patch) | |
| tree | a6ee61e3ac7571516b693c2465c6309a59cd0a08 /net/core/neighbour.c | |
| parent | 60395a20ffd74166ea373ea91418d6f98fa7fdfb (diff) | |
| download | linux-4fd3d7d9e868ffbdb0e7a67c5c8e9dfdcd846a62.tar.bz2 | |
neigh: Add helper function neigh_xmit
For MPLS I am building the code so that either the neighbour mac
address can be specified or we can have a next hop in ipv4 or ipv6.
The kind of next hop we have is indicated by the neighbour table
pointer. A neighbour table pointer of NULL is a link layer address.
A non-NULL neighbour table pointer indicates which neighbour table and
thus which address family the next hop address is in that we need to
look up.
The code either sends a packet directly or looks up the appropriate
neighbour table entry and sends the packet.
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/neighbour.c')
| -rw-r--r-- | net/core/neighbour.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/net/core/neighbour.c b/net/core/neighbour.c index fe3c6eac5805..cffaf00561e7 100644 --- a/net/core/neighbour.c +++ b/net/core/neighbour.c @@ -2391,6 +2391,40 @@ void __neigh_for_each_release(struct neigh_table *tbl, } EXPORT_SYMBOL(__neigh_for_each_release); +int neigh_xmit(int family, struct net_device *dev, + const void *addr, struct sk_buff *skb) +{ + int err; + if (family == AF_PACKET) { + err = dev_hard_header(skb, dev, ntohs(skb->protocol), + addr, NULL, skb->len); + if (err < 0) + goto out_kfree_skb; + err = dev_queue_xmit(skb); + } else { + struct neigh_table *tbl; + struct neighbour *neigh; + + err = -ENETDOWN; + tbl = neigh_find_table(family); + if (!tbl) + goto out; + neigh = __neigh_lookup_noref(tbl, addr, dev); + if (!neigh) + neigh = __neigh_create(tbl, addr, dev, false); + err = PTR_ERR(neigh); + if (IS_ERR(neigh)) + goto out_kfree_skb; + err = neigh->output(neigh, skb); + } +out: + return err; +out_kfree_skb: + kfree_skb(skb); + goto out; +} +EXPORT_SYMBOL(neigh_xmit); + #ifdef CONFIG_PROC_FS static struct neighbour *neigh_get_first(struct seq_file *seq) |