From 7df624e79a450ba6b737b972040d9007ecc61672 Mon Sep 17 00:00:00 2001 From: Laurent Vivier Date: Wed, 6 Mar 2024 16:58:36 +1100 Subject: checksum: introduce functions to compute the header part checksum for TCP/UDP The TCP and UDP checksums are computed using the data in the TCP/UDP payload but also some informations in the IP header (protocol, length, source and destination addresses). We add two functions, proto_ipv4_header_psum() and proto_ipv6_header_psum(), to compute the checksum of the IP header part. Signed-off-by: Laurent Vivier Message-ID: <20240303135114.1023026-8-lvivier@redhat.com> Signed-off-by: David Gibson Signed-off-by: Stefano Brivio --- checksum.h | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'checksum.h') diff --git a/checksum.h b/checksum.h index 996f456..0f39676 100644 --- a/checksum.h +++ b/checksum.h @@ -15,10 +15,15 @@ uint16_t csum_fold(uint32_t sum); uint16_t csum_unaligned(const void *buf, size_t len, uint32_t init); uint16_t csum_ip4_header(uint16_t tot_len, uint8_t protocol, struct in_addr saddr, struct in_addr daddr); +uint32_t proto_ipv4_header_psum(uint16_t tot_len, uint8_t protocol, + struct in_addr saddr, struct in_addr daddr); void csum_udp4(struct udphdr *udp4hr, struct in_addr saddr, struct in_addr daddr, const void *payload, size_t len); void csum_icmp4(struct icmphdr *icmp4hr, const void *payload, size_t len); +uint32_t proto_ipv6_header_psum(uint16_t payload_len, uint8_t protocol, + const struct in6_addr *saddr, + const struct in6_addr *daddr); void csum_udp6(struct udphdr *udp6hr, const struct in6_addr *saddr, const struct in6_addr *daddr, const void *payload, size_t len); -- cgit v1.2.3