Scroll to navigation

ipv6(3) libnetfilter_queue ipv6(3)

NAME

ipv6 - IPv6 helper functions

SYNOPSIS

Functions


struct ip6_hdr * nfq_ip6_get_hdr (struct pkt_buff *pktb)
int nfq_ip6_set_transport_header (struct pkt_buff *pktb, struct ip6_hdr *ip6h, uint8_t target)
int nfq_ip6_mangle (struct pkt_buff *pktb, unsigned int dataoff, unsigned int match_offset, unsigned int match_len, const char *rep_buffer, unsigned int rep_len)
int nfq_ip6_snprintf (char *buf, size_t size, const struct ip6_hdr *ip6h)

Detailed Description

Function Documentation

struct ip6_hdr * nfq_ip6_get_hdr (struct pkt_buff * pktb)

nfq_ip6_get_hdr - get IPv6 header

Parameters

pktb Pointer to user-space network packet buffer

Returns

pointer to IPv6 header if a valid header found, else NULL.

Definition at line 36 of file ipv6.c.

int nfq_ip6_mangle (struct pkt_buff * pktb, unsigned int dataoff, unsigned int match_offset, unsigned int match_len, const char * rep_buffer, unsigned int rep_len)

nfq_ip6_mangle - mangle IPv6 packet buffer

Parameters

pktb Pointer to user-space network packet buffer
dataoff Offset to layer 4 header
match_offset Offset to content that you want to mangle
match_len Length of the existing content you want to mangle
rep_buffer Pointer to data you want to use to replace current content
rep_len Length of data you want to use to replace current content

Returns

1 for success and 0 for failure. See pktb_mangle() for failure case

Note

This function updates the IPv6 length (if necessary)

Definition at line 131 of file ipv6.c.

int nfq_ip6_set_transport_header (struct pkt_buff * pktb, struct ip6_hdr * ip6h, uint8_t target)

nfq_ip6_set_transport_header - set transport header pointer for IPv6 packet

Parameters

pktb Pointer to user-space network packet buffer
ip6h Pointer to IPv6 header
target Protocol number to find transport header (ie. IPPROTO_*)

Returns

1 if the protocol has been found and the transport header has been set, else 0.

Definition at line 64 of file ipv6.c.

int nfq_ip6_snprintf (char * buf, size_t size, const struct ip6_hdr * ip6h)

nfq_ip6_snprintf - print IPv6 header into one buffer in iptables LOG format

Parameters

buf Pointer to buffer that is used to print the object
size Size of the buffer (or remaining room in it).
ip6h Pointer to a valid IPv6 header.

Returns

same as snprintf

See also

snprintf(3)

Definition at line 158 of file ipv6.c.

Author

Generated automatically by Doxygen for libnetfilter_queue from the source code.

Wed Aug 9 2023 Version 1.0.5