proto_dns_udp.c File Reference

DHCPv6 handler for UDP. More...

#include <freeradius-devel/server/protocol.h>
#include <freeradius-devel/server/cf_util.h>
#include <freeradius-devel/util/udp.h>
#include <freeradius-devel/util/table.h>
#include <freeradius-devel/util/trie.h>
#include <freeradius-devel/io/application.h>
#include <freeradius-devel/io/listen.h>
#include <freeradius-devel/io/schedule.h>
#include <freeradius-devel/protocol/dns/freeradius.internal.h>
#include "proto_dns.h"

Include dependency graph for proto_dns_udp.c:

Go to the source code of this file.

Data Structures
struct	proto_dns_udp_t
struct	proto_dns_udp_thread_t

Macros
#define	LOG_PREFIX   "proto_dns_udp"

Functions
static fr_client_t *	mod_client_find (fr_listen_t *li, fr_ipaddr_t const *ipaddr, int ipproto)
static int	mod_connection_set (fr_listen_t *li, fr_io_address_t *connection)
static int	mod_fd_set (fr_listen_t *li, int fd)
	Set the file descriptor for this socket.
static int	mod_instantiate (module_inst_ctx_t const *mctx)
static char const *	mod_name (fr_listen_t *li)
static void	mod_network_get (int *ipproto, bool *dynamic_clients, fr_trie_t const **trie, void *instance)
static int	mod_open (fr_listen_t *li)
	Open a UDP listener for DHCPv6.
static ssize_t	mod_read (fr_listen_t *li, void **packet_ctx, fr_time_t *recv_time_p, uint8_t *buffer, size_t buffer_len, size_t *leftover)
static ssize_t	mod_write (fr_listen_t *li, void *packet_ctx, UNUSED fr_time_t request_time, uint8_t *buffer, size_t buffer_len, UNUSED size_t written)

Variables
static fr_dict_attr_t const *	attr_packet_type
static fr_dict_t const *	dict_dns
static const conf_parser_t	networks_config []
fr_app_io_t	proto_dns_udp
fr_dict_autoload_t	proto_dns_udp_dict []
fr_dict_attr_autoload_t	proto_dns_udp_dict_attr []
static const conf_parser_t	udp_listen_config []

Detailed Description

DHCPv6 handler for UDP.

Id

75c0a069014c2535bff9b8cb9019f3acae362a3b

Copyright

2020 Network RADIUS SAS (legal.nosp@m.@net.nosp@m.workr.nosp@m.adiu.nosp@m.s.com)

Definition in file proto_dns_udp.c.

---

Data Structure Documentation

proto_dns_udp_t

struct proto_dns_udp_t

Definition at line 48 of file proto_dns_udp.c.

Collaboration diagram for proto_dns_udp_t:

Data Fields
fr_ipaddr_t *	allow	allowed networks for dynamic clients
fr_client_list_t *	clients	local clients
CONF_SECTION *	cs	our configuration
fr_client_t *	default_client	default 0/0 client
fr_ipaddr_t *	deny	denied networks for dynamic clients
char const *	interface	Interface to bind to.
fr_ipaddr_t	ipaddr	IP address to listen on.
uint32_t	max_attributes	Limit maximum decodable attributes.
uint32_t	max_packet_size	for message ring buffer.
uint16_t	port	Port to listen on.
uint32_t	recv_buff	How big the kernel's receive buffer should be.
bool	recv_buff_is_set	Whether we were provided with a receive buffer value.
fr_trie_t *	trie	for parsed networks

proto_dns_udp_thread_t

struct proto_dns_udp_thread_t

Definition at line 39 of file proto_dns_udp.c.

Collaboration diagram for proto_dns_udp_thread_t:

Data Fields
fr_io_address_t *	connection	for connected sockets.
char const *	name	socket name
int	sockfd
fr_stats_t	stats	statistics for this socket

Macro Definition Documentation

LOG_PREFIX

#define LOG_PREFIX   "proto_dns_udp"

Definition at line 24 of file proto_dns_udp.c.

Function Documentation

mod_client_find()

static fr_client_t * mod_client_find ( fr_listen_t *  li, fr_ipaddr_t const *  ipaddr, int  ipproto  )

static

Definition at line 429 of file proto_dns_udp.c.

Here is the call graph for this function:

mod_connection_set()

static int mod_connection_set ( fr_listen_t *  li, fr_io_address_t *  connection  )

static

Definition at line 236 of file proto_dns_udp.c.

mod_fd_set()

static int mod_fd_set ( fr_listen_t *  li, int  fd  )

static

Set the file descriptor for this socket.

Definition at line 317 of file proto_dns_udp.c.

Here is the call graph for this function:

mod_instantiate()

static int mod_instantiate ( module_inst_ctx_t const *  mctx )

static

Definition at line 341 of file proto_dns_udp.c.

Here is the call graph for this function:

mod_name()

static char const * mod_name ( fr_listen_t *  li )

static

Definition at line 333 of file proto_dns_udp.c.

mod_network_get()

static void mod_network_get ( int *  ipproto, bool *  dynamic_clients, fr_trie_t const **  trie, void *  instance  )

static

Definition at line 245 of file proto_dns_udp.c.

mod_open()

static int mod_open ( fr_listen_t *  li )

static

Open a UDP listener for DHCPv6.

Definition at line 258 of file proto_dns_udp.c.

Here is the call graph for this function:

mod_read()

static ssize_t mod_read ( fr_listen_t *  li, void **  packet_ctx, fr_time_t *  recv_time_p, uint8_t *  buffer, size_t  buffer_len, size_t *  leftover  )

static

Definition at line 117 of file proto_dns_udp.c.

Here is the call graph for this function:

mod_write()

static ssize_t mod_write ( fr_listen_t *  li, void *  packet_ctx, UNUSED fr_time_t  request_time, uint8_t *  buffer, size_t  buffer_len, UNUSED size_t  written  )

static

Definition at line 189 of file proto_dns_udp.c.

Here is the call graph for this function:

Variable Documentation

attr_packet_type

fr_dict_attr_t const* attr_packet_type

static

Definition at line 108 of file proto_dns_udp.c.

dict_dns

fr_dict_t const* dict_dns

static

Definition at line 100 of file proto_dns_udp.c.

networks_config

const conf_parser_t networks_config[]

static

Initial value:

= {
        { FR_CONF_OFFSET_TYPE_FLAGS("allow", FR_TYPE_COMBO_IP_PREFIX , CONF_FLAG_MULTI, proto_dns_udp_t, allow) },
        { FR_CONF_OFFSET_TYPE_FLAGS("deny", FR_TYPE_COMBO_IP_PREFIX , CONF_FLAG_MULTI, proto_dns_udp_t, deny) },
 
        CONF_PARSER_TERMINATOR
}

Definition at line 74 of file proto_dns_udp.c.

proto_dns_udp

fr_app_io_t proto_dns_udp

Initial value:

= {
        .common = {
                .magic                  = MODULE_MAGIC_INIT,
                .name                   = "dns_udp",
                .config                 = udp_listen_config,
                .inst_size              = sizeof(proto_dns_udp_t),
                .thread_inst_size       = sizeof(proto_dns_udp_thread_t),
                .instantiate            = mod_instantiate
        },
        .default_message_size   = 576,
        .track_duplicates       = false,
 
        .open                   = mod_open,
        .read                   = mod_read,
        .write                  = mod_write,
        .fd_set                 = mod_fd_set,
        .connection_set         = mod_connection_set,
        .network_get            = mod_network_get,
        .client_find            = mod_client_find,
        .get_name               = mod_name,
}

Definition at line 446 of file proto_dns_udp.c.

proto_dns_udp_dict

fr_dict_autoload_t proto_dns_udp_dict

Initial value:

= {
        { .out = &dict_dns, .proto = "dns" },
        DICT_AUTOLOAD_TERMINATOR
}

Definition at line 103 of file proto_dns_udp.c.

proto_dns_udp_dict_attr

fr_dict_attr_autoload_t proto_dns_udp_dict_attr

Initial value:

= {
        { .out = &attr_packet_type, .name = "Packet-Type", .type = FR_TYPE_UINT32, .dict = &dict_dns},
 
        DICT_AUTOLOAD_TERMINATOR
}

Definition at line 111 of file proto_dns_udp.c.

udp_listen_config

const conf_parser_t udp_listen_config[]

static

Initial value:

= {
        { FR_CONF_OFFSET_TYPE_FLAGS("ipaddr", FR_TYPE_COMBO_IP_ADDR, 0, proto_dns_udp_t, ipaddr) },
        { FR_CONF_OFFSET_TYPE_FLAGS("ipv6addr", FR_TYPE_IPV6_ADDR, 0, proto_dns_udp_t, ipaddr) },
        { FR_CONF_OFFSET_TYPE_FLAGS("ipv4addr", FR_TYPE_IPV4_ADDR, 0, proto_dns_udp_t, ipaddr) },
 
        { FR_CONF_OFFSET("interface", proto_dns_udp_t, interface) },
 
        { FR_CONF_OFFSET("port", proto_dns_udp_t, port), .dflt = "547"  },
        { FR_CONF_OFFSET_IS_SET("recv_buff", FR_TYPE_UINT32, 0, proto_dns_udp_t, recv_buff) },
 
        { FR_CONF_POINTER("networks", 0, CONF_FLAG_SUBSECTION, NULL), .subcs = (void const *) networks_config },
 
        { FR_CONF_OFFSET("max_packet_size", proto_dns_udp_t, max_packet_size), .dflt = "576" } ,
        { FR_CONF_OFFSET("max_attributes", proto_dns_udp_t, max_attributes), .dflt = STRINGIFY(DNS_MAX_ATTRIBUTES) } ,
 
        CONF_PARSER_TERMINATOR
}

Definition at line 82 of file proto_dns_udp.c.