network.c File Reference

BIO patricia trie filtering handlers. More...

#include <freeradius-devel/util/value.h>
#include <freeradius-devel/util/trie.h>
#include <freeradius-devel/bio/bio_priv.h>
#include <freeradius-devel/bio/fd_priv.h>
#include <freeradius-devel/bio/network.h>

Include dependency graph for network.c:

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Data Structures
struct	fr_bio_network_t
	The network filtering bio. More...

Functions
fr_bio_t *	fr_bio_network_alloc (TALLOC_CTX *ctx, fr_ipaddr_t const *allow, fr_ipaddr_t const *deny, fr_bio_read_t discard, fr_bio_t *next)
	Allocate a bio for filtering IP addresses. More...
static ssize_t	fr_bio_network_read (fr_bio_t *bio, void *packet_ctx, void *buffer, size_t size)
	Read a UDP packet, and only return packets from allowed sources. More...
fr_trie_t *	fr_bio_network_trie_alloc (TALLOC_CTX *ctx, int af, fr_ipaddr_t const *allow, fr_ipaddr_t const *deny)
	Create a patricia trie for doing network filtering. More...

Detailed Description

BIO patricia trie filtering handlers.

Id

48fda491369cb10dc471045f89e858d6976eed62

Copyright

2024 Network RADIUS SAS (legal.nosp@m.@net.nosp@m.workr.nosp@m.adiu.nosp@m.s.com)

Definition in file network.c.

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Data Structure Documentation

fr_bio_network_t

struct fr_bio_network_t

The network filtering bio.

Definition at line 35 of file network.c.

Collaboration diagram for fr_bio_network_t:

Data Fields
fr_bio_read_t	discard	callback to run when discarding a packet due to filtering
	FR_BIO_COMMON
size_t	offset	where fr_bio_fd_packet_ctx_t is stored
fr_trie_t const *	trie	patricia trie for filtering

Function Documentation

fr_bio_network_alloc()

fr_bio_t* fr_bio_network_alloc	(	TALLOC_CTX *	ctx,
		fr_ipaddr_t const *	allow,
		fr_ipaddr_t const *	deny,
		fr_bio_read_t	discard,
		fr_bio_t *	next
	)

Allocate a bio for filtering IP addresses.

This is used for unconnected UDP bios, where we filter packets based on source IP address.

It is also used for accept bios, where we filter new connections based on source IP address. The caller should chain this bio to the next FD bio, and then fr_bio_read() from the top-level bio. The result will be filtered or "clean" FDs.

A patricia trie (but not the bio) could also be used in an haproxy "activate" callback, where the callback gets the haproxy socket info, and then checks if the source is allowed. However, that patricia trie is a property of the main "accept" bio, and should be managed by the activate() callback for the haproxy bio.

Definition at line 92 of file network.c.

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fr_bio_network_read()

static ssize_t fr_bio_network_read ( fr_bio_t *  bio, void *  packet_ctx, void *  buffer, size_t  size  )

static

Read a UDP packet, and only return packets from allowed sources.

Definition at line 48 of file network.c.

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fr_bio_network_trie_alloc()

fr_trie_t* fr_bio_network_trie_alloc	(	TALLOC_CTX *	ctx,
		int	af,
		fr_ipaddr_t const *	allow,
		fr_ipaddr_t const *	deny
	)

Create a patricia trie for doing network filtering.

Definition at line 165 of file network.c.

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