diff mbox series

[net-next,04/15] udp: support sctp over udp in skb_udp_tunnel_segment

Message ID 97963ca7171b92486f46477b55928182abe44806.1601387231.git.lucien.xin@gmail.com
State New
Headers show
Series sctp: Implement RFC6951: UDP Encapsulation of SCTP | expand

Commit Message

Xin Long Sept. 29, 2020, 1:48 p.m. UTC 
To call sctp_gso_segment() properly in skb_udp_tunnel_segment() for sctp
over udp packets, we need to set transport_header to sctp header. When
skb->ip_summed == CHECKSUM_PARTIAL, skb_crc32c_csum_help() should be
called for the inner sctp packet.

Signed-off-by: Xin Long <lucien.xin@gmail.com>
---
 net/ipv4/udp_offload.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/net/ipv4/udp_offload.c b/net/ipv4/udp_offload.c
index c0b010b..a484405 100644
--- a/net/ipv4/udp_offload.c
+++ b/net/ipv4/udp_offload.c
@@ -49,6 +49,7 @@  static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb,
 	__skb_pull(skb, tnl_hlen);
 	skb_reset_mac_header(skb);
 	skb_set_network_header(skb, skb_inner_network_offset(skb));
+	skb_set_transport_header(skb, skb_inner_transport_offset(skb));
 	skb->mac_len = skb_inner_network_offset(skb);
 	skb->protocol = new_protocol;
 
@@ -131,8 +132,12 @@  static struct sk_buff *__skb_udp_tunnel_segment(struct sk_buff *skb,
 		uh->check = ~csum_fold(csum_add(partial,
 				       (__force __wsum)htonl(len)));
 
-		if (skb->encapsulation)
-			skb_checksum_help(skb);
+		if (skb->encapsulation) {
+			if (skb->csum_not_inet)
+				skb_crc32c_csum_help(skb);
+			else
+				skb_checksum_help(skb);
+		}
 
 		if (offload_csum) {
 			skb->ip_summed = CHECKSUM_PARTIAL;