network.c File Reference

#include <fcntl.h>
#include "network.h"
#include "tls.h"
#include "url.h"
#include "libavcodec/internal.h"
#include "libavutil/avutil.h"
#include "libavutil/avassert.h"
#include "libavutil/mem.h"
#include "libavutil/time.h"

Go to the source code of this file.

Data Structures
struct	ConnectionAttempt

Macros
#define	NEXT_ATTEMPT_DELAY_MS   200

Functions
int	ff_tls_init (void)
void	ff_tls_deinit (void)
int	ff_network_init (void)
int	ff_network_wait_fd (int fd, int write)
int	ff_network_wait_fd_timeout (int fd, int write, int64_t timeout, AVIOInterruptCB *int_cb)
	This works similarly to ff_network_wait_fd, but waits up to 'timeout' microseconds Uses ff_network_wait_fd in a loop. More...
int	ff_network_sleep_interruptible (int64_t timeout, AVIOInterruptCB *int_cb)
	Waits for up to 'timeout' microseconds. More...
void	ff_network_close (void)
int	ff_is_multicast_address (struct sockaddr *addr)
static int	ff_poll_interrupt (struct pollfd *p, nfds_t nfds, int timeout, AVIOInterruptCB *cb)
int	ff_socket (int af, int type, int proto)
int	ff_listen (int fd, const struct sockaddr *addr, socklen_t addrlen)
	Bind to a file descriptor to an address without accepting connections. More...
int	ff_accept (int fd, int timeout, URLContext *h)
	Poll for a single connection on the passed file descriptor. More...
int	ff_listen_bind (int fd, const struct sockaddr *addr, socklen_t addrlen, int timeout, URLContext *h)
	Bind to a file descriptor and poll for a connection. More...
int	ff_listen_connect (int fd, const struct sockaddr *addr, socklen_t addrlen, int timeout, URLContext *h, int will_try_next)
	Connect to a file descriptor and poll for result. More...
static void	interleave_addrinfo (struct addrinfo *base)
static void	print_address_list (void *ctx, const struct addrinfo *addr, const char *title)
static int	start_connect_attempt (struct ConnectionAttempt *attempt, struct addrinfo **ptr, int timeout_ms, URLContext *h, void(*customize_fd)(void *, int), void *customize_ctx)
int	ff_connect_parallel (struct addrinfo *addrs, int timeout_ms_per_address, int parallel, URLContext *h, int *fd, void(*customize_fd)(void *, int), void *customize_ctx)
	Connect to any of the given addrinfo addresses, with multiple attempts running in parallel. More...
static int	match_host_pattern (const char *pattern, const char *hostname)
int	ff_http_match_no_proxy (const char *no_proxy, const char *hostname)
void	ff_log_net_error (void *ctx, int level, const char *prefix)

Macro Definition Documentation

#define NEXT_ATTEMPT_DELAY_MS   200

Definition at line 401 of file network.c.

Referenced by ff_connect_parallel().

Function Documentation

int ff_tls_init

(

void

)

Definition at line 31 of file network.c.

Referenced by avformat_network_init().

void ff_tls_deinit

(

void

)

Definition at line 46 of file network.c.

Referenced by avformat_network_deinit().

int ff_network_init

(

void

)

Definition at line 58 of file network.c.

Referenced by avformat_network_init(), sap_read_header(), sap_write_header(), and url_alloc_for_protocol().

int ff_network_wait_fd	(	int	fd,
		int	write
	)

Definition at line 69 of file network.c.

Referenced by ff_network_wait_fd_timeout(), rtp_write(), udp_read(), udp_write(), unix_read(), and unix_write().

int ff_network_wait_fd_timeout	(	int	fd,
		int	write,
		int64_t	timeout,
		AVIOInterruptCB *	int_cb
	)

This works similarly to ff_network_wait_fd, but waits up to 'timeout' microseconds Uses ff_network_wait_fd in a loop.

Parameters

fd	Socket descriptor
write	Set 1 to wait for socket able to be read, 0 to be written
timeout	Timeout interval, in microseconds. Actual precision is 100000 mcs, due to ff_network_wait_fd usage
int_cb	Interrupt callback, is checked before each ff_network_wait_fd call

Returns

0 if data can be read/written, AVERROR(ETIMEDOUT) if timeout expired, or negative error code

Definition at line 78 of file network.c.

Referenced by tcp_read(), and tcp_write().

int ff_network_sleep_interruptible	(	int64_t	timeout,
		AVIOInterruptCB *	int_cb
	)

Waits for up to 'timeout' microseconds.

If the usert's int_cb is set and triggered, return before that.

Parameters

timeout	Timeout in microseconds. Maybe have lower actual precision.
int_cb	Interrupt callback, is checked regularly.

Returns

AVERROR(ETIMEDOUT) if timeout expirted, AVERROR_EXIT if interrupted by int_cb

Definition at line 98 of file network.c.

Referenced by http_read_stream().

void ff_network_close

(

void

)

Definition at line 116 of file network.c.

Referenced by avformat_network_deinit(), ffurl_closep(), rtsp_read_close(), rtsp_write_close(), sap_read_close(), sap_write_close(), and url_alloc_for_protocol().

int ff_is_multicast_address

(

struct sockaddr *

addr

)

Definition at line 145 of file network.c.

Referenced by ff_udp_set_remote_url().

static int ff_poll_interrupt ( struct pollfd *  p, nfds_t  nfds, int  timeout, AVIOInterruptCB *  cb  )

static

Definition at line 159 of file network.c.

Referenced by ff_accept(), ff_connect_parallel(), and ff_listen_connect().

int ff_socket	(	int	af,
		int	type,
		int	proto
	)

Definition at line 183 of file network.c.

Referenced by sctp_open(), start_connect_attempt(), tcp_open(), udp_socket_create(), and unix_open().

int ff_listen	(	int	fd,
		const struct sockaddr *	addr,
		socklen_t	addrlen
	)

Bind to a file descriptor to an address without accepting connections.

Parameters

fd	First argument of bind().
addr	Second argument of bind().
addrlen	Third argument of bind().

Returns

0 on success or an AVERROR on failure.

Definition at line 210 of file network.c.

Referenced by ff_listen_bind(), and tcp_open().

int ff_accept	(	int	fd,
		int	timeout,
		URLContext *	h
	)

Poll for a single connection on the passed file descriptor.

Parameters

fd	The listening socket file descriptor.
timeout	Polling timeout in milliseconds.
h	URLContext providing interrupt check callback and logging context.

Returns

A non-blocking file descriptor on success or an AVERROR on failure.

Definition at line 228 of file network.c.

Referenced by ff_listen_bind(), and tcp_accept().

int ff_listen_bind	(	int	fd,
		const struct sockaddr *	addr,
		socklen_t	addrlen,
		int	timeout,
		URLContext *	h
	)

Bind to a file descriptor and poll for a connection.

Parameters

fd	First argument of bind().
addr	Second argument of bind().
addrlen	Third argument of bind().
timeout	Polling timeout in milliseconds.
h	URLContext providing interrupt check callback and logging context.

Returns

A non-blocking file descriptor on success or an AVERROR on failure.

Definition at line 246 of file network.c.

Referenced by sctp_open(), tcp_open(), and unix_open().

int ff_listen_connect	(	int	fd,
		const struct sockaddr *	addr,
		socklen_t	addrlen,
		int	timeout,
		URLContext *	h,
		int	will_try_next
	)

Connect to a file descriptor and poll for result.

Parameters

fd	First argument of connect(), will be set as non-blocking.
addr	Second argument of connect().
addrlen	Third argument of connect().
timeout	Polling timeout in milliseconds.
h	URLContext providing interrupt check callback and logging context.
will_try_next	Whether the caller will try to connect to another address for the same host name, affecting the form of logged errors.

Returns

0 on success, AVERROR on failure.

Definition at line 258 of file network.c.

Referenced by sctp_open(), and unix_open().

static void interleave_addrinfo ( struct addrinfo *  base )

static

Definition at line 303 of file network.c.

Referenced by ff_connect_parallel().

static void print_address_list ( void *  ctx, const struct addrinfo *  addr, const char *  title  )

static

Definition at line 334 of file network.c.

Referenced by ff_connect_parallel().

static int start_connect_attempt ( struct ConnectionAttempt *  attempt, struct addrinfo **  ptr, int  timeout_ms, URLContext *  h, void(*)(void *, int)  customize_fd, void *  customize_ctx  )

static

Definition at line 356 of file network.c.

Referenced by ff_connect_parallel().

int ff_connect_parallel	(	struct addrinfo *	addrs,
		int	timeout_ms_per_address,
		int	parallel,
		URLContext *	h,
		int *	fd,
		void(*)(void *, int)	customize_fd,
		void *	customize_ctx
	)

Connect to any of the given addrinfo addresses, with multiple attempts running in parallel.

Parameters

addrs	The list of addresses to try to connect to. This list will be mutated internally, but the list head will remain as such, so this doesn't affect the caller freeing the list afterwards.
timeout_ms_per_address	The number of milliseconds to wait for each connection attempt. Since multiple addresses are tried, some of them in parallel, the total run time will at most be timeout_ms_per_address*ceil(nb_addrs/parallel) + (parallel - 1) * NEXT_ATTEMPT_DELAY_MS.
parallel	The maximum number of connections to attempt in parallel. This is limited to an internal maximum capacity.
h	URLContext providing interrupt check callback and logging context.
fd	If successful, the connected socket is returned here.
customize_fd	Function that will be called for each socket created, to allow the caller to set socket options before calling connect() on it, may be NULL.
customize_ctx	Context parameter passed to customize_fd.

Returns

0 on success, AVERROR on failure.

Definition at line 403 of file network.c.

Referenced by tcp_open().

static int match_host_pattern ( const char *  pattern, const char *  hostname  )

static

Definition at line 527 of file network.c.

Referenced by ff_http_match_no_proxy().

int ff_http_match_no_proxy	(	const char *	no_proxy,
		const char *	hostname
	)

Definition at line 551 of file network.c.

Referenced by ff_tls_open_underlying(), http_open_cnx_internal(), and test().

void ff_log_net_error	(	void *	ctx,
		int	level,
		const char *	prefix
	)

Definition at line 581 of file network.c.

Referenced by customize_fd(), ff_udp_set_remote_url(), udp_join_multicast_group(), udp_leave_multicast_group(), udp_open(), udp_set_multicast_sources(), udp_set_multicast_ttl(), and udp_socket_create().