.TH "tcp_internals" 3 "Mon Apr 11 2022" "Version 1.0.5" "libnetfilter_queue" \" -*- nroff -*-
.ad l
.nh
.SH NAME
tcp_internals \- Internal TCP functions
.SH SYNOPSIS
.br
.PP
.SS "Functions"

.in +1c
.ti -1c
.RI "void \fBnfq_tcp_compute_checksum_ipv4\fP (struct tcphdr *tcph, struct iphdr *iph)"
.br
.ti -1c
.RI "void \fBnfq_tcp_compute_checksum_ipv6\fP (struct tcphdr *tcph, struct ip6_hdr *ip6h)"
.br
.in -1c
.SH "Detailed Description"
.PP 
Most user-space programs will never need these\&. 
.SH "Function Documentation"
.PP 
.SS "void nfq_tcp_compute_checksum_ipv4 (struct tcphdr * tcph, struct iphdr * iph)"
nfq_tcp_compute_checksum_ipv4 - computes IPv4/TCP packet checksum 
.PP
\fBParameters\fP
.RS 4
\fItcph\fP pointer to the TCP header 
.br
\fIiph\fP pointer to the IPv4 header 
.RE
.PP
\fBNote\fP
.RS 4
\fBnfq_tcp_mangle_ipv4()\fP invokes this function\&. As long as developers always use \fBnfq_tcp_mangle_ipv4\fP when changing the content of a TCP message, there is no need to call \fBnfq_tcp_compute_checksum_ipv4\fP\&. 
.RE
.PP

.PP
Definition at line 108 of file tcp\&.c\&.
.SS "void nfq_tcp_compute_checksum_ipv6 (struct tcphdr * tcph, struct ip6_hdr * ip6h)"
nfq_tcp_compute_checksum_ipv6 - computes IPv6/TCP packet checksum 
.PP
\fBParameters\fP
.RS 4
\fItcph\fP pointer to the TCP header 
.br
\fIip6h\fP pointer to the IPv6 header 
.RE
.PP
\fBNote\fP
.RS 4
\fBnfq_tcp_mangle_ipv6()\fP invokes this function\&. As long as developers always use \fBnfq_tcp_mangle_ipv6\fP when changing the content of a TCP message, there is no need to call \fBnfq_tcp_compute_checksum_ipv6\fP\&. 
.RE
.PP

.PP
Definition at line 126 of file tcp\&.c\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for libnetfilter_queue from the source code\&.