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netdev-dummy: Implement ARP responder.

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This is the only missing piece to make native tunneling work with dummy
devices for testing purposes.

Signed-off-by: Ben Pfaff <blp@nicira.com>
Acked-by: Alex Wang <alexw@nicira.com>
This commit is contained in:
Ben Pfaff
2015-05-10 00:01:59 -07:00
parent eb0b295efb
commit bde96a9a89
1 changed files with 17 additions and 0 deletions
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17
lib/netdev-dummy.c
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@@ -932,6 +932,23 @@ netdev_dummy_send(struct netdev *netdev, int qid OVS_UNUSED,
dummy_packet_conn_send(&dev->conn, buffer, size);
/* Reply to ARP requests for 'dev''s assigned IP address. */
if (dev->address.s_addr) {
struct dp_packet packet;
struct flow flow;
dp_packet_use_const(&packet, buffer, size);
flow_extract(&packet, &flow);
if (flow.dl_type == htons(ETH_TYPE_ARP)
&& flow.nw_proto == ARP_OP_REQUEST
&& flow.nw_dst == dev->address.s_addr) {
struct dp_packet *reply = dp_packet_new(0);
compose_arp(reply, ARP_OP_REPLY, dev->hwaddr, flow.dl_src,
false, flow.nw_dst, flow.nw_src);
netdev_dummy_queue_packet(dev, reply);
}
}
if (dev->tx_pcap) {
struct dp_packet packet;