We can't use skb_reset_transport_header() together with skb_put() to set
skb->transport_header field because skb_put() does not touch skb->data.
Do this same way as we did for csum_data in code: substract skb->head
from tcph.
Signed-off-by: Serhey Popovych <serhe.popov...@gmail.com>
---
net/ipv4/netfilter/ipt_SYNPROXY.c | 8 ++++----
net/ipv6/netfilter/ip6t_SYNPROXY.c | 8 ++++----
2 files changed, 8 insertions(+), 8 deletions(-)
diff --git a/net/ipv4/netfilter/ipt_SYNPROXY.c
b/net/ipv4/netfilter/ipt_SYNPROXY.c
index f75fc6b..4953390 100644
--- a/net/ipv4/netfilter/ipt_SYNPROXY.c
+++ b/net/ipv4/netfilter/ipt_SYNPROXY.c
@@ -90,8 +90,8 @@
niph = synproxy_build_ip(net, nskb, iph->daddr, iph->saddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->dest;
nth->dest = th->source;
nth->seq = htonl(__cookie_v4_init_sequence(iph, th, &mss));
@@ -132,8 +132,8 @@
niph = synproxy_build_ip(net, nskb, iph->saddr, iph->daddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->source;
nth->dest = th->dest;
nth->seq = htonl(recv_seq - 1);
@@ -177,8 +177,8 @@
niph = synproxy_build_ip(net, nskb, iph->daddr, iph->saddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->dest;
nth->dest = th->source;
nth->seq = htonl(ntohl(th->ack_seq));
@@ -215,8 +215,8 @@
niph = synproxy_build_ip(net, nskb, iph->saddr, iph->daddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->source;
nth->dest = th->dest;
nth->seq = htonl(ntohl(th->seq) + 1);
diff --git a/net/ipv6/netfilter/ip6t_SYNPROXY.c
b/net/ipv6/netfilter/ip6t_SYNPROXY.c
index 437af8c..46c1e28 100644
--- a/net/ipv6/netfilter/ip6t_SYNPROXY.c
+++ b/net/ipv6/netfilter/ip6t_SYNPROXY.c
@@ -104,8 +104,8 @@
niph = synproxy_build_ip(net, nskb, &iph->daddr, &iph->saddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->dest;
nth->dest = th->source;
nth->seq = htonl(__cookie_v6_init_sequence(iph, th, &mss));
@@ -146,8 +146,8 @@
niph = synproxy_build_ip(net, nskb, &iph->saddr, &iph->daddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->source;
nth->dest = th->dest;
nth->seq = htonl(recv_seq - 1);
@@ -191,8 +191,8 @@
niph = synproxy_build_ip(net, nskb, &iph->daddr, &iph->saddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->dest;
nth->dest = th->source;
nth->seq = htonl(ntohl(th->ack_seq));
@@ -229,8 +229,8 @@
niph = synproxy_build_ip(net, nskb, &iph->saddr, &iph->daddr);
- skb_reset_transport_header(nskb);
nth = skb_put(nskb, tcp_hdr_size);
+ nskb->transport_header = (unsigned char *)nth - nskb->head;
nth->source = th->source;
nth->dest = th->dest;
nth->seq = htonl(ntohl(th->seq) + 1);
--
1.8.3.1
--
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