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tcp_internals(3) libnetfilter_queue tcp_internals(3)

NAME

tcp_internals - Internal TCP functions

SYNOPSIS

Functions


void nfq_tcp_compute_checksum_ipv4 (struct tcphdr *tcph, struct iphdr *iph)
void nfq_tcp_compute_checksum_ipv6 (struct tcphdr *tcph, struct ip6_hdr *ip6h)

Detailed Description

Most user-space programs will never need these.

Function Documentation

void nfq_tcp_compute_checksum_ipv4 (struct tcphdr * tcph, struct iphdr * iph)

nfq_tcp_compute_checksum_ipv4 - computes IPv4/TCP packet checksum

Parameters

tcph pointer to the TCP header
iph pointer to the IPv4 header

Note

nfq_tcp_mangle_ipv4() invokes this function. As long as developers always use nfq_tcp_mangle_ipv4 when changing the content of a TCP message, there is no need to call nfq_tcp_compute_checksum_ipv4.

Definition at line 108 of file tcp.c.

void nfq_tcp_compute_checksum_ipv6 (struct tcphdr * tcph, struct ip6_hdr * ip6h)

nfq_tcp_compute_checksum_ipv6 - computes IPv6/TCP packet checksum

Parameters

tcph pointer to the TCP header
ip6h pointer to the IPv6 header

Note

nfq_tcp_mangle_ipv6() invokes this function. As long as developers always use nfq_tcp_mangle_ipv6 when changing the content of a TCP message, there is no need to call nfq_tcp_compute_checksum_ipv6.

Definition at line 126 of file tcp.c.

Author

Generated automatically by Doxygen for libnetfilter_queue from the source code.

Wed Aug 9 2023 Version 1.0.5