From: Patrick McHardy Date: Sun, 21 Aug 2005 00:39:15 +0000 (-0700) Subject: [NETFILTER]: Fix HW checksum handling in ECN target X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=f93592ff4fa4a55aa7640d435fa93338e190294d;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git [NETFILTER]: Fix HW checksum handling in ECN target Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- diff --git a/net/ipv4/netfilter/ipt_ECN.c b/net/ipv4/netfilter/ipt_ECN.c index d3250a3a5db4..94a0ce1c1c9d 100644 --- a/net/ipv4/netfilter/ipt_ECN.c +++ b/net/ipv4/netfilter/ipt_ECN.c @@ -71,6 +71,10 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward) return 0; tcph = (void *)(*pskb)->nh.iph + (*pskb)->nh.iph->ihl*4; + if ((*pskb)->ip_summed == CHECKSUM_HW && + skb_checksum_help(*pskb, inward)) + return 0; + diffs[0] = ((u_int16_t *)tcph)[6]; if (einfo->operation & IPT_ECN_OP_SET_ECE) tcph->ece = einfo->proto.tcp.ece; @@ -79,13 +83,10 @@ set_ect_tcp(struct sk_buff **pskb, const struct ipt_ECN_info *einfo, int inward) diffs[1] = ((u_int16_t *)tcph)[6]; diffs[0] = diffs[0] ^ 0xFFFF; - if ((*pskb)->ip_summed != CHECKSUM_HW) + if ((*pskb)->ip_summed != CHECKSUM_UNNECESSARY) tcph->check = csum_fold(csum_partial((char *)diffs, sizeof(diffs), tcph->check^0xFFFF)); - else - if (skb_checksum_help(*pskb, inward)) - return 0; (*pskb)->nfcache |= NFC_ALTERED; return 1; }