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net/filter-rewriter.c: Fix rewirter checksum bug when use virtio-net 

Because vnet_hdr have a offset to net packet, we must add it when use
virtio-net.

Signed-off-by: Zhang Chen <zhangchen.fnst@cn.fujitsu.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Zhang Chen 2017-07-28 18:03:10 +08:00 committed by Jason Wang
parent cda4a338c4
commit 6ce310b535
1 changed files with 4 additions and 2 deletions
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6
net/filter-rewriter.c
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@ -99,7 +99,8 @@ static int handle_primary_tcp_pkt(NetFilterState *nf,
/* handle packets to the secondary from the primary */
tcp_pkt->th_ack = htonl(ntohl(tcp_pkt->th_ack) + conn->offset);
net_checksum_calculate((uint8_t *)pkt->data, pkt->size);
net_checksum_calculate((uint8_t *)pkt->data + pkt->vnet_hdr_len,
pkt->size - pkt->vnet_hdr_len);
}
}
@ -138,7 +139,8 @@ static int handle_secondary_tcp_pkt(NetFilterState *nf,
/* handle packets to the primary from the secondary*/
tcp_pkt->th_seq = htonl(ntohl(tcp_pkt->th_seq) - conn->offset);
net_checksum_calculate((uint8_t *)pkt->data, pkt->size);
net_checksum_calculate((uint8_t *)pkt->data + pkt->vnet_hdr_len,
pkt->size - pkt->vnet_hdr_len);
}
}