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netpoll: provide an IP ident in UDP frames

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Let's fill IP header ident field with a meaningful value,
it might help some setups.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2012-08-24 01:47:26 +00:00
committed by David S. Miller
parent 6549dd43c0
commit ee13040901
1 changed files with 2 additions and 1 deletions
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3
net/core/netpoll.c
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@@ -388,6 +388,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
struct udphdr *udph; struct udphdr *udph;
struct iphdr *iph; struct iphdr *iph;
struct ethhdr *eth; struct ethhdr *eth;
static atomic_t ip_ident;
udp_len = len + sizeof(*udph); udp_len = len + sizeof(*udph);
ip_len = udp_len + sizeof(*iph); ip_len = udp_len + sizeof(*iph);
@@ -423,7 +424,7 @@ void netpoll_send_udp(struct netpoll *np, const char *msg, int len)
put_unaligned(0x45, (unsigned char *)iph); put_unaligned(0x45, (unsigned char *)iph);
iph->tos = 0; iph->tos = 0;
put_unaligned(htons(ip_len), &(iph->tot_len)); put_unaligned(htons(ip_len), &(iph->tot_len));
iph->id = 0; iph->id = htons(atomic_inc_return(&ip_ident));
iph->frag_off = 0; iph->frag_off = 0;
iph->ttl = 64; iph->ttl = 64;
iph->protocol = IPPROTO_UDP; iph->protocol = IPPROTO_UDP;