Modify checksum verification to allow the validation of skb->ip_summed, in case the checksum has already been verified by another process.
Signed-off-by: Nathalie Romo Moreno <natha.ro.moreno@xxxxxxxxx>
Signed-off-by: Markus Amend <markus.amend@xxxxxxxxxx>
---
net/dccp/ipv4.c | 8 +++++---
net/dccp/ipv6.c | 4 ++--
2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c index 26a21d97b6b0..0d777888efe1 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -763,8 +763,9 @@ int dccp_invalid_packet(struct sk_buff *skb)
}
/* If header checksum is incorrect, drop packet and return.
- * (This step is completed in the AF-dependent functions.) */
- skb->csum = skb_checksum(skb, 0, cscov, 0);
+ * (This step is completed in the AF-dependent functions.)
+ * skb->csum = skb_checksum(skb, 0, cscov, 0);
+ */
return 0;
}
@@ -786,7 +787,8 @@ static int dccp_v4_rcv(struct sk_buff *skb)
iph = ip_hdr(skb);
/* Step 1: If header checksum is incorrect, drop packet and return */
- if (dccp_v4_csum_finish(skb, iph->saddr, iph->daddr)) {
+ if (__skb_checksum_validate(skb, IPPROTO_DCCP,
+ true, false, 0, inet_compute_pseudo)) {
DCCP_WARN("dropped packet with invalid checksum\n");
goto discard_it;
}
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c index d5740bad5b18..7cb7c9f3e5e1 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -695,8 +695,8 @@ static int dccp_v6_rcv(struct sk_buff *skb)
goto discard_it;
/* Step 1: If header checksum is incorrect, drop packet and return. */
- if (dccp_v6_csum_finish(skb, &ipv6_hdr(skb)->saddr,
- &ipv6_hdr(skb)->daddr)) {
+ if (__skb_checksum_validate(skb, IPPROTO_DCCP,
+ true, false, 0, ip6_compute_pseudo)) {
DCCP_WARN("dropped packet with invalid checksum\n");
goto discard_it;
}
--
2.20.1
