colin/passt
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add csum_icmp6() helper for calculating ICMPv6 checksums

Browse Source 
At least two places in passt calculate ICMPv6 checksums, ndp() and
tap_ip_send().  Add a helper to handle this calculation in both places.
For future flexibility, the new helper takes parameters for the fields in
the IPv6 pseudo-header, so an IPv6 header or pseudo-header doesn't need to
be explicitly constructed.  It also allows the ICMPv6 header and payload to
be in separate buffers, although we don't use this yet.

Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
David Gibson
2022-10-19 11:43:44 +11:00
committed by Stefano Brivio
parent b3f359167b
commit 7abd2b0d72
4 changed files with 33 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
checksum.h
View File

@@ -6,9 +6,14 @@
#ifndef CHECKSUM_H
#define CHECKSUM_H
struct icmp6hdr;
uint32_t sum_16b(const void *buf, size_t len);
uint16_t csum_fold(uint32_t sum);
uint16_t csum_unaligned(const void *buf, size_t len, uint32_t init);
void csum_icmp6(struct icmp6hdr *icmp6hr,
const struct in6_addr *saddr, const struct in6_addr *daddr,
const void *payload, size_t len);
void csum_tcp4(struct iphdr *iph);
uint16_t csum(const void *buf, size_t len, uint32_t init);