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Diffstat (limited to 'net/ipv4/tcp_ipv4.c')
-rw-r--r--net/ipv4/tcp_ipv4.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/net/ipv4/tcp_ipv4.c b/net/ipv4/tcp_ipv4.c
index 26b9030747cc..10172487921b 100644
--- a/net/ipv4/tcp_ipv4.c
+++ b/net/ipv4/tcp_ipv4.c
@@ -2346,6 +2346,41 @@ void tcp4_proc_exit(void)
}
#endif /* CONFIG_PROC_FS */
+struct sk_buff **tcp4_gro_receive(struct sk_buff **head, struct sk_buff *skb)
+{
+ struct iphdr *iph = ip_hdr(skb);
+
+ switch (skb->ip_summed) {
+ case CHECKSUM_COMPLETE:
+ if (!tcp_v4_check(skb->len, iph->saddr, iph->daddr,
+ skb->csum)) {
+ skb->ip_summed = CHECKSUM_UNNECESSARY;
+ break;
+ }
+
+ /* fall through */
+ case CHECKSUM_NONE:
+ NAPI_GRO_CB(skb)->flush = 1;
+ return NULL;
+ }
+
+ return tcp_gro_receive(head, skb);
+}
+EXPORT_SYMBOL(tcp4_gro_receive);
+
+int tcp4_gro_complete(struct sk_buff *skb)
+{
+ struct iphdr *iph = ip_hdr(skb);
+ struct tcphdr *th = tcp_hdr(skb);
+
+ th->check = ~tcp_v4_check(skb->len - skb_transport_offset(skb),
+ iph->saddr, iph->daddr, 0);
+ skb_shinfo(skb)->gso_type = SKB_GSO_TCPV4;
+
+ return tcp_gro_complete(skb);
+}
+EXPORT_SYMBOL(tcp4_gro_complete);
+
struct proto tcp_prot = {
.name = "TCP",
.owner = THIS_MODULE,