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Commit 58a406de authored by Ido Schimmel's avatar Ido Schimmel Committed by David S. Miller
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netdevsim: Set offsets to various protocol layers 



The driver periodically generates "trapped" UDP packets that it then
passes on to devlink. Set the offsets to the various protocol layers.

This is a prerequisite to the next patch, where drop monitor is taught
to check that the offset to the MAC header was set.

Acked-by: default avatarJiri Pirko <jiri@mellanox.com>
Signed-off-by: default avatarIdo Schimmel <idosch@mellanox.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent db539cae

drivers/net/netdevsim/dev.c

+3 −0
Original line number Diff line number Diff line
@@ -374,12 +374,14 @@ static struct sk_buff *nsim_dev_trap_skb_build(void) 
		return NULL;

	tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;



	skb_reset_mac_header(skb);

	eth = skb_put(skb, sizeof(struct ethhdr));

	eth_random_addr(eth->h_dest);

	eth_random_addr(eth->h_source);

	eth->h_proto = htons(ETH_P_IP);

	skb->protocol = htons(ETH_P_IP);



	skb_set_network_header(skb, skb->len);

	iph = skb_put(skb, sizeof(struct iphdr));

	iph->protocol = IPPROTO_UDP;

	iph->saddr = in_aton("192.0.2.1");
@@ -392,6 +394,7 @@ static struct sk_buff *nsim_dev_trap_skb_build(void) 
	iph->check = 0;

	iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);



	skb_set_transport_header(skb, skb->len);

	udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);

	get_random_bytes(&udph->source, sizeof(u16));

	get_random_bytes(&udph->dest, sizeof(u16));