openkylin
/
linux
mirror of https://gitee.com/openkylin/linux.git
9
0
Fork 0
Code Issues Projects Releases Wiki Activity

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: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ido Schimmel 2019-09-15 09:46:35 +03:00 committed by David S. Miller
parent db539cae12
commit 58a406def4
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/net/netdevsim/dev.c
View File

@ -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));