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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: Jiri Pirko <jiri@mellanox.com> Signed-off-by: Ido Schimmel <idosch@mellanox.com> Signed-off-by: David S. Miller <davem@davemloft.net>
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1 changed files with 3 additions and 0 deletions
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@ -374,12 +374,14 @@ static struct sk_buff *nsim_dev_trap_skb_build(void)
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return NULL;
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tot_len = sizeof(struct iphdr) + sizeof(struct udphdr) + data_len;
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skb_reset_mac_header(skb);
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eth = skb_put(skb, sizeof(struct ethhdr));
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eth_random_addr(eth->h_dest);
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eth_random_addr(eth->h_source);
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eth->h_proto = htons(ETH_P_IP);
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skb->protocol = htons(ETH_P_IP);
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skb_set_network_header(skb, skb->len);
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iph = skb_put(skb, sizeof(struct iphdr));
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iph->protocol = IPPROTO_UDP;
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iph->saddr = in_aton("192.0.2.1");
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@ -392,6 +394,7 @@ static struct sk_buff *nsim_dev_trap_skb_build(void)
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iph->check = 0;
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iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
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skb_set_transport_header(skb, skb->len);
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udph = skb_put_zero(skb, sizeof(struct udphdr) + data_len);
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get_random_bytes(&udph->source, sizeof(u16));
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get_random_bytes(&udph->dest, sizeof(u16));
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