diff options
Diffstat (limited to 'checksum.c')
| -rw-r--r-- | checksum.c | 34 |
1 files changed, 0 insertions, 34 deletions
@@ -211,40 +211,6 @@ void csum_icmp6(struct icmp6hdr *icmp6hr, icmp6hr->icmp6_cksum = csum_unaligned(payload, len, psum); } -/** - * csum_tcp4() - Calculate TCP checksum for IPv4 and set in place - * @iph: Packet buffer, IP header - */ -void csum_tcp4(struct iphdr *iph) -{ - uint16_t tlen = ntohs(iph->tot_len) - iph->ihl * 4, *p; - struct tcphdr *th; - uint32_t sum = 0; - - th = (struct tcphdr *)((char *)iph + (intptr_t)(iph->ihl * 4)); - p = (uint16_t *)th; - - sum += (iph->saddr >> 16) & 0xffff; - sum += iph->saddr & 0xffff; - sum += (iph->daddr >> 16) & 0xffff; - sum += iph->daddr & 0xffff; - - sum += htons(IPPROTO_TCP); - sum += htons(tlen); - - th->check = 0; - while (tlen > 1) { - sum += *p++; - tlen -= 2; - } - - if (tlen > 0) { - sum += *p & htons(0xff00); - } - - th->check = (uint16_t)~csum_fold(sum); -} - #ifdef __AVX2__ #include <immintrin.h> |