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icmp and ipp support

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bol-van
2026-01-26 14:22:38 +03:00
parent 90fa71d6d6
commit 78b3baa03f
35 changed files with 3213 additions and 561 deletions
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25
nfq2/checksum.c
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@@ -95,10 +95,7 @@ static uint16_t do_csum(const uint8_t *buff, size_t len)
return u16;
}
uint16_t csum_partial(const void *buff, size_t len)
{
return do_csum(buff, len);
}
#define csum_partial(buff, len) do_csum((const uint8_t*)buff,len)
uint16_t csum_tcpudp_magic(uint32_t saddr, uint32_t daddr, size_t len, uint8_t proto, uint16_t sum)
{
@@ -107,7 +104,7 @@ uint16_t csum_tcpudp_magic(uint32_t saddr, uint32_t daddr, size_t len, uint8_t p
uint16_t ip4_compute_csum(const void *buff, size_t len)
{
return ~from64to16(do_csum(buff, len));
return ~csum_partial(buff, len);
}
void ip4_fix_checksum(struct ip *ip)
{
@@ -158,3 +155,21 @@ void udp_fix_checksum(struct udphdr *udp, size_t len, const struct ip *ip, const
else if (ip6hdr)
udp6_fix_checksum(udp, len, &ip6hdr->ip6_src, &ip6hdr->ip6_dst);
}
void icmp4_fix_checksum(struct icmp46 *icmp, size_t len)
{
icmp->icmp_cksum = 0;
icmp->icmp_cksum = ~csum_partial(icmp, len);
}
void icmp6_fix_checksum(struct icmp46 *icmp, size_t len, const struct ip6_hdr *ip6hdr)
{
icmp->icmp_cksum = 0;
icmp->icmp_cksum = csum_ipv6_magic(&ip6hdr->ip6_src, &ip6hdr->ip6_dst, len, IPPROTO_ICMPV6, csum_partial(icmp, len));
}
void icmp_fix_checksum(struct icmp46 *icmp, size_t len, const struct ip6_hdr *ip6hdr)
{
if (ip6hdr)
icmp6_fix_checksum(icmp, len, ip6hdr);
else
icmp4_fix_checksum(icmp, len);
}