Master IO handler. More...

#include <freeradius-devel/io/listen.h>
#include <freeradius-devel/io/master.h>
#include <freeradius-devel/server/base.h>
#include <freeradius-devel/server/module.h>
#include <freeradius-devel/util/debug.h>
#include <freeradius-devel/util/misc.h>
#include <freeradius-devel/util/syserror.h>

Include dependency graph for master.c:

Go to the source code of this file.

Data Structures
struct	fr_io_client_s
	Client definitions for master IO. More...

struct	fr_io_connection_s
	Track a connection. More...

struct	fr_io_pending_packet_t
	A saved packet. More...

struct	fr_io_thread_t

Macros
#define	COPY_FIELD(_x) c->_x = parent->_x

#define	COPY_FIELD(_x) client->radclient->_x = radclient->_x

#define	DUP_FIELD(_x) do { if (parent->_x) {c->_x = talloc_strdup(c, parent->_x); if (!c->_x) {goto error;}}} while (0)

#define	DUP_FIELD(_x) client->radclient->_x = talloc_strdup(client->radclient, radclient->_x)

Typedefs
typedef struct fr_io_connection_s	fr_io_connection_t

Enumerations
enum	fr_io_client_state_t { PR_CLIENT_INVALID = 0 , PR_CLIENT_STATIC , PR_CLIENT_NAK , PR_CLIENT_DYNAMIC , PR_CLIENT_CONNECTED , PR_CLIENT_PENDING }
	Client states. More...

Functions
static int	_client_free (fr_io_client_t *client)

static int	_client_live_free (fr_io_client_t *client)

static int	_thread_io_free (fr_io_thread_t *thread)

static int8_t	address_cmp (void const one, void const two)

static int8_t	alive_client_cmp (void const one, void const two)

static fr_io_client_t *	client_alloc (TALLOC_CTX ctx, fr_io_client_state_t state, fr_io_instance_t const inst, fr_io_thread_t thread, fr_client_t radclient, fr_ipaddr_t const *network)

static void	client_expiry_timer (fr_event_list_t el, fr_time_t now, void uctx)

static int8_t	connection_cmp (void const one, void const two)

static int	connection_free (fr_io_connection_t *connection)

static uint32_t	connection_hash (void const *ctx)

static int	count_connections (UNUSED uint8_t const key, UNUSED size_t keylen, void data, void *ctx)
	Count the number of connections used by active clients. More...

static fr_io_connection_t *	fr_io_connection_alloc (fr_io_instance_t const inst, fr_io_thread_t thread, fr_io_client_t client, int fd, fr_io_address_t address, fr_io_connection_t *nak)
	Create a new connection. More...

int	fr_io_listen_free (fr_listen_t *li)

static fr_io_pending_packet_t *	fr_io_pending_alloc (fr_io_client_t client, uint8_t const buffer, size_t packet_len, fr_io_track_t *track, int priority)

static fr_io_track_t *	fr_io_track_add (fr_io_client_t client, fr_io_address_t address, uint8_t const packet, size_t packet_len, fr_time_t recv_time, bool is_dup)

int	fr_master_io_listen (TALLOC_CTX ctx, fr_io_instance_t inst, fr_schedule_t *sc, size_t default_message_size, size_t num_messages)

fr_trie_t *	fr_master_io_network (TALLOC_CTX ctx, int af, fr_ipaddr_t allow, fr_ipaddr_t *deny)
	Create a trie from arrays of allow / deny IP addresses. More...

fr_io_track_t *	fr_master_io_track_alloc (fr_listen_t li, fr_client_t radclient, fr_ipaddr_t const src_ipaddr, int src_port, fr_ipaddr_t const dst_ipaddr, int dst_port)

static void	get_inst (fr_listen_t li, fr_io_instance_t const inst, fr_io_thread_t thread, fr_io_connection_t connection, fr_listen_t *child)

static int	mod_bootstrap (module_inst_ctx_t const *mctx)

static int	mod_close (fr_listen_t *li)
	Close the socket. More...

static void	mod_event_list_set (fr_listen_t li, fr_event_list_t el, void *nr)
	Set the event list for a new socket. More...

static int	mod_inject (fr_listen_t li, uint8_t const buffer, size_t buffer_len, fr_time_t recv_time)
	Inject a packet to a connection. More...

static int	mod_instantiate (module_inst_ctx_t const *mctx)

static char const *	mod_name (fr_listen_t *li)

static int	mod_open (fr_listen_t *li)
	Open a new listener. More...

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)
	Implement 99% of the read routines. More...

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

static void	packet_expiry_timer (fr_event_list_t el, fr_time_t now, void uctx)

static int8_t	pending_client_cmp (void const one, void const two)

static int	pending_free (fr_io_pending_packet_t *pending)

static int8_t	pending_packet_cmp (void const one, void const two)

static fr_io_pending_packet_t *	pending_packet_pop (fr_io_thread_t *thread)

static fr_client_t *	radclient_alloc (TALLOC_CTX ctx, int ipproto, fr_io_address_t address)

static fr_client_t *	radclient_clone (TALLOC_CTX ctx, fr_client_t const parent)

static int8_t	track_cmp (void const one, void const two)

static int8_t	track_connected_cmp (void const one, void const two)

static int	track_dedup_free (fr_io_track_t *track)

static int	track_free (fr_io_track_t *track)

Variables
fr_app_io_t	fr_master_app_io

static fr_event_update_t	pause_read []

static fr_event_update_t	resume_read []

Detailed Description

Master IO handler.

Id: df78db39dc9e6a28a002cf2e1d9754a8850e09dd

Copyright: 2018 Alan DeKok (aland.nosp@m.@fre.nosp@m.eradi.nosp@m.us.o.nosp@m.rg)

Definition in file master.c.

Data Structure Documentation

◆ fr_io_client_s

struct fr_io_client_s

Client definitions for master IO.

Definition at line 98 of file master.c.

Collaboration diagram for fr_io_client_s:

Data Fields
fr_hash_table_t *	addresses	list of src/dst addresses used by this client
fr_heap_index_t	alive_id	for all clients
fr_io_connection_t *	connection	parent connection
fr_event_timer_t const *	ev	when we clean up the client
fr_hash_table_t *	ht	for tracking connected sockets
bool	in_trie	is the client in the trie?
fr_io_instance_t const *	inst	parent instance for master IO handler
pthread_mutex_t	mutex	for parent / child signaling
fr_ipaddr_t	network	network for dynamic clients
int	packets	number of packets using this client
fr_heap_t *	pending	pending packets for this client
fr_heap_index_t	pending_id	for pending clients
fr_client_t *	radclient	old-style definition of this client
bool	ready_to_delete	are we ready to delete this client?
fr_ipaddr_t	src_ipaddr	packets come from this address
fr_io_client_state_t	state	state of this client
fr_rb_tree_t *	table	tracking table for packets
fr_io_thread_t *	thread
bool	use_connected	does this client allow connected sub-sockets?

◆ fr_io_connection_s

struct fr_io_connection_s

Track a connection.

This structure contains information about the connection, a pointer to the library instance so that we can clean up on exit, and the listener.

It also points to a client structure which is for this connection, and only this connection.

Finally, a pointer to the parent client, so that the child can tell the parent it's alive, and the parent can push packets to the child.

Definition at line 138 of file master.c.

Collaboration diagram for fr_io_connection_s:

Data Fields
fr_io_address_t *	address	full information about the connection.
fr_listen_t *	child	child listener (app_io) for this socket
fr_io_client_t *	client	our local client (pending or connected).
bool	dead	roundabout way to get the network side to close a socket
dl_module_inst_t *	dl_inst	for submodule
fr_event_list_t *	el	event list for this connection
fr_listen_t *	listen	master listener for this socket
char const *	name	taken from proto_FOO_TRANSPORT
fr_network_t *	nr	network for this connection
int	packets	number of packets using this connection
fr_io_client_t *	parent	points to the parent client.
bool	paused	event filter doesn't like resuming something that isn't paused

◆ fr_io_pending_packet_t

struct fr_io_pending_packet_t

A saved packet.

Definition at line 55 of file master.c.

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Data Fields
uint8_t *	buffer
size_t	buffer_len
fr_heap_index_t	heap_id
uint32_t	priority
fr_time_t	recv_time
fr_io_track_t *	track

◆ fr_io_thread_t

struct fr_io_thread_t

Definition at line 34 of file master.c.

Collaboration diagram for fr_io_thread_t:

Data Fields
fr_heap_t *	alive_clients	heap of active clients
fr_listen_t *	child	The child (app_io) IO path.
uint64_t	client_id	Unique client identifier.
fr_event_list_t *	el	event list, for the master socket.
fr_listen_t *	listen	The master IO path.
fr_network_t *	nr	network for the master socket
uint32_t	num_connections	number of dynamic connections
uint32_t	num_pending_packets	number of pending packets
fr_heap_t *	pending_clients	heap of pending clients
fr_schedule_t *	sc	the scheduler
fr_trie_t *	trie	trie of clients

Macro Definition Documentation

◆ COPY_FIELD [1/2]

#define COPY_FIELD ( _x ) c->_x = parent->_x

◆ COPY_FIELD [2/2]

#define COPY_FIELD ( _x ) client->radclient->_x = radclient->_x

◆ DUP_FIELD [1/2]

#define DUP_FIELD ( _x ) do { if (parent->_x) {c->_x = talloc_strdup(c, parent->_x); if (!c->_x) {goto error;}}} while (0)

◆ DUP_FIELD [2/2]

#define DUP_FIELD ( _x ) client->radclient->_x = talloc_strdup(client->radclient, radclient->_x)

Typedef Documentation

◆ fr_io_connection_t

typedef struct fr_io_connection_s fr_io_connection_t

Definition at line 1 of file master.c.

Enumeration Type Documentation

◆ fr_io_client_state_t

enum fr_io_client_state_t

Client states.

Enumerator
PR_CLIENT_INVALID
PR_CLIENT_STATIC	static / global clients
PR_CLIENT_NAK	negative cache entry
PR_CLIENT_DYNAMIC	dynamically defined client
PR_CLIENT_CONNECTED	dynamically defined client in a connected socket
PR_CLIENT_PENDING	dynamic client pending definition

Definition at line 68 of file master.c.

Function Documentation

◆ _client_free()

static int _client_free ( fr_io_client_t * client )

static

Definition at line 451 of file master.c.

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◆ _client_live_free()

static int _client_live_free ( fr_io_client_t * client )

static

Definition at line 900 of file master.c.

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◆ _thread_io_free()

static int _thread_io_free ( fr_io_thread_t * thread )

static

Definition at line 2894 of file master.c.

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◆ address_cmp()

static int8_t address_cmp	(	void const *	one,
		void const *	two
	)

static

Definition at line 240 of file master.c.

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◆ alive_client_cmp()

static int8_t alive_client_cmp	(	void const *	one,
		void const *	two
	)

static

Definition at line 1226 of file master.c.

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◆ client_alloc()

static fr_io_client_t* client_alloc	(	TALLOC_CTX *	ctx,
		fr_io_client_state_t	state,
		fr_io_instance_t const *	inst,
		fr_io_thread_t *	thread,
		fr_client_t *	radclient,
		fr_ipaddr_t const *	network
	)

static

Definition at line 914 of file master.c.

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◆ client_expiry_timer()

static void client_expiry_timer	(	fr_event_list_t *	el,
		fr_time_t	now,
		void *	uctx
	)

static

Definition at line 1926 of file master.c.

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◆ connection_cmp()

static int8_t connection_cmp	(	void const *	one,
		void const *	two
	)

static

Definition at line 270 of file master.c.

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◆ connection_free()

static int connection_free ( fr_io_connection_t * connection )

static

Definition at line 458 of file master.c.

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◆ connection_hash()

static uint32_t connection_hash ( void const * ctx )

static

Definition at line 256 of file master.c.

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◆ count_connections()

static int count_connections	(	UNUSED uint8_t const *	key,
		UNUSED size_t	keylen,
		void *	data,
		void *	ctx
	)

static

Count the number of connections used by active clients.

Unfortunately, we also count NAK'd connections, too, even if they are closed. The alternative is to walk through all connections for each client, which would be a long time.

Definition at line 429 of file master.c.

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◆ fr_io_connection_alloc()

static fr_io_connection_t* fr_io_connection_alloc	(	fr_io_instance_t const *	inst,
		fr_io_thread_t *	thread,
		fr_io_client_t *	client,
		int	fd,
		fr_io_address_t *	address,
		fr_io_connection_t *	nak
	)

static

Create a new connection.

Called ONLY from the master socket.

Definition at line 473 of file master.c.

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◆ fr_io_listen_free()

int fr_io_listen_free ( fr_listen_t * li )

Definition at line 2915 of file master.c.

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◆ fr_io_pending_alloc()

static fr_io_pending_packet_t* fr_io_pending_alloc	(	fr_io_client_t *	client,
		uint8_t const *	buffer,
		size_t	packet_len,
		fr_io_track_t *	track,
		int	priority
	)

static

Definition at line 1181 of file master.c.

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◆ fr_io_track_add()

static fr_io_track_t* fr_io_track_add	(	fr_io_client_t *	client,
		fr_io_address_t *	address,
		uint8_t const *	packet,
		size_t	packet_len,
		fr_time_t	recv_time,
		bool *	is_dup
	)

static

Definition at line 1011 of file master.c.

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◆ fr_master_io_listen()

int fr_master_io_listen	(	TALLOC_CTX *	ctx,
		fr_io_instance_t *	inst,
		fr_schedule_t *	sc,
		size_t	default_message_size,
		size_t	num_messages
	)

Definition at line 2923 of file master.c.

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◆ fr_master_io_network()

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

Create a trie from arrays of allow / deny IP addresses.

Parameters

ctx	the talloc ctx
af	the address family to allow
allow	the array of IPs / networks to allow. MUST be talloc'd
deny	the array of IPs / networks to deny. MAY be NULL, MUST be talloc'd

Returns

fr_trie_t on success
NULL on error

Definition at line 2744 of file master.c.

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◆ fr_master_io_track_alloc()

fr_io_track_t* fr_master_io_track_alloc	(	fr_listen_t *	li,
		fr_client_t *	radclient,
		fr_ipaddr_t const *	src_ipaddr,
		int	src_port,
		fr_ipaddr_t const *	dst_ipaddr,
		int	dst_port
	)

Definition at line 3090 of file master.c.

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◆ get_inst()

static void get_inst	(	fr_listen_t *	li,
		fr_io_instance_t const **	inst,
		fr_io_thread_t **	thread,
		fr_io_connection_t **	connection,
		fr_listen_t **	child
	)

static

Definition at line 852 of file master.c.

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◆ mod_bootstrap()

static int mod_bootstrap ( module_inst_ctx_t const * mctx )

static

Definition at line 2628 of file master.c.

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◆ mod_close()

static int mod_close ( fr_listen_t * li )

static

Close the socket.

Definition at line 2579 of file master.c.

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◆ mod_event_list_set()

static void mod_event_list_set	(	fr_listen_t *	li,
		fr_event_list_t *	el,
		void *	nr
	)

static

Set the event list for a new socket.

Parameters

[in]	li	the listener
[in]	el	the event list
[in]	nr	context from the network side

Definition at line 1893 of file master.c.

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◆ mod_inject()

static int mod_inject	(	fr_listen_t *	li,
		uint8_t const *	buffer,
		size_t	buffer_len,
		fr_time_t	recv_time
	)

static

Inject a packet to a connection.

Always called in the context of the network.

Definition at line 1803 of file master.c.

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◆ mod_instantiate()

static int mod_instantiate ( module_inst_ctx_t const * mctx )

static

Definition at line 2718 of file master.c.

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◆ mod_name()

static char const* mod_name ( fr_listen_t * li )

static

Definition at line 2704 of file master.c.

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◆ mod_open()

static int mod_open ( fr_listen_t * li )

static

Open a new listener.

Definition at line 1857 of file master.c.

◆ 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

Implement 99% of the read routines.

The app_io->read does the transport-specific data read.

Definition at line 1238 of file master.c.

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◆ mod_write()

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

static

Definition at line 2202 of file master.c.

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◆ packet_expiry_timer()

static void packet_expiry_timer	(	fr_event_list_t *	el,
		fr_time_t	now,
		void *	uctx
	)

static

Definition at line 2137 of file master.c.

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◆ pending_client_cmp()

static int8_t pending_client_cmp	(	void const *	one,
		void const *	two
	)

static

Definition at line 222 of file master.c.

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◆ pending_free()

static int pending_free ( fr_io_pending_packet_t * pending )

static

Definition at line 1157 of file master.c.

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◆ pending_packet_cmp()

static int8_t pending_packet_cmp	(	void const *	one,
		void const *	two
	)

static

Definition at line 192 of file master.c.

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◆ pending_packet_pop()

static fr_io_pending_packet_t* pending_packet_pop ( fr_io_thread_t * thread )

static

Definition at line 335 of file master.c.

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◆ radclient_alloc()

static fr_client_t* radclient_alloc	(	TALLOC_CTX *	ctx,
		int	ipproto,
		fr_io_address_t *	address
	)

static

Definition at line 872 of file master.c.

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◆ radclient_clone()

static fr_client_t* radclient_clone	(	TALLOC_CTX *	ctx,
		fr_client_t const *	parent
	)

static

Definition at line 371 of file master.c.

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◆ track_cmp()

static int8_t track_cmp	(	void const *	one,
		void const *	two
	)

static

Definition at line 279 of file master.c.

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◆ track_connected_cmp()

static int8_t track_connected_cmp	(	void const *	one,
		void const *	two
	)

static

Definition at line 309 of file master.c.

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◆ track_dedup_free()

static int track_dedup_free ( fr_io_track_t * track )

static

Definition at line 176 of file master.c.

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◆ track_free()

static int track_free ( fr_io_track_t * track )

static

Definition at line 164 of file master.c.

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Variable Documentation

◆ fr_master_app_io

fr_app_io_t fr_master_app_io

Initial value:

= {
        .common = {
                .magic                  = MODULE_MAGIC_INIT,
                .name                   = "radius_master_io",
 
                .bootstrap              = mod_bootstrap,
                .instantiate            = mod_instantiate,
        },
        .default_message_size   = 4096,
        .track_duplicates       = true,
 
        .read                   = mod_read,
        .write                  = mod_write,
        .inject                 = mod_inject,
 
        .open                   = mod_open,
        .close                  = mod_close,
        .event_list_set         = mod_event_list_set,
        .get_name               = mod_name,
}

Definition at line 3131 of file master.c.

◆ pause_read

fr_event_update_t pause_read[]

static

Initial value:

= {
        FR_EVENT_SUSPEND(fr_event_io_func_t, read),
        { 0 }
}

Definition at line 154 of file master.c.

◆ resume_read

fr_event_update_t resume_read[]

static

Initial value:

= {
        FR_EVENT_RESUME(fr_event_io_func_t, read),
        { 0 }
}

Definition at line 159 of file master.c.

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Detailed Description

Data Structure Documentation

◆ fr_io_client_s

◆ fr_io_connection_s

◆ fr_io_pending_packet_t

◆ fr_io_thread_t

Macro Definition Documentation

◆ COPY_FIELD [1/2]

◆ COPY_FIELD [2/2]

◆ DUP_FIELD [1/2]

◆ DUP_FIELD [2/2]

Typedef Documentation

◆ fr_io_connection_t

Enumeration Type Documentation

◆ fr_io_client_state_t

Function Documentation

◆ _client_free()

◆ _client_live_free()

◆ _thread_io_free()

◆ address_cmp()

◆ alive_client_cmp()

◆ client_alloc()

◆ client_expiry_timer()

◆ connection_cmp()

◆ connection_free()

◆ connection_hash()

◆ count_connections()

◆ fr_io_connection_alloc()

◆ fr_io_listen_free()

◆ fr_io_pending_alloc()

◆ fr_io_track_add()

◆ fr_master_io_listen()

◆ fr_master_io_network()

◆ fr_master_io_track_alloc()

◆ get_inst()

◆ mod_bootstrap()

◆ mod_close()

◆ mod_event_list_set()

◆ mod_inject()

◆ mod_instantiate()

◆ mod_name()

◆ mod_open()

◆ mod_read()

◆ mod_write()

◆ packet_expiry_timer()

◆ pending_client_cmp()

◆ pending_free()

◆ pending_packet_cmp()

◆ pending_packet_pop()

◆ radclient_alloc()

◆ radclient_clone()

◆ track_cmp()

◆ track_connected_cmp()

◆ track_dedup_free()

◆ track_free()

Variable Documentation

◆ fr_master_app_io

◆ pause_read

◆ resume_read