udp.c File Reference

UDP protocol. More...

#include "avformat.h"
#include "avio_internal.h"
#include "libavutil/parseutils.h"
#include "libavutil/avstring.h"
#include <unistd.h>
#include "internal.h"
#include "network.h"
#include "os_support.h"
#include "url.h"
#include <sys/time.h>

Go to the source code of this file.

Data Structures

struct  UDPContext

Macros

#define _BSD_SOURCE   /* Needed for using struct ip_mreq with recent glibc */
#define IPV6_ADD_MEMBERSHIP   IPV6_JOIN_GROUP
#define IPV6_DROP_MEMBERSHIP   IPV6_LEAVE_GROUP
#define UDP_TX_BUF_SIZE   32768
#define UDP_MAX_PKT_SIZE   65536

Functions

static int udp_set_multicast_ttl (int sockfd, int mcastTTL, struct sockaddr *addr)
static int udp_join_multicast_group (int sockfd, struct sockaddr *addr)
static int udp_leave_multicast_group (int sockfd, struct sockaddr *addr)
static struct addrinfoudp_resolve_host (const char *hostname, int port, int type, int family, int flags)
static int udp_set_url (struct sockaddr_storage *addr, const char *hostname, int port)
static int udp_socket_create (UDPContext *s, struct sockaddr_storage *addr, int *addr_len, const char *localaddr)
static int udp_port (struct sockaddr_storage *addr, int addr_len)
int ff_udp_set_remote_url (URLContext *h, const char *uri)
 If no filename is given to av_open_input_file because you want to get the local port first, then you must call this function to set the remote server address.
int ff_udp_get_local_port (URLContext *h)
 Return the local port used by the UDP connection.
static int udp_get_file_handle (URLContext *h)
 Return the udp file handle for select() usage to wait for several RTP streams at the same time.
static int udp_open (URLContext *h, const char *uri, int flags)
static int udp_read (URLContext *h, uint8_t *buf, int size)
static int udp_write (URLContext *h, const uint8_t *buf, int size)
static int udp_close (URLContext *h)

Variables

URLProtocol ff_udp_protocol

Detailed Description

UDP protocol.

Definition in file udp.c.

Macro Definition Documentation

#define _BSD_SOURCE   /* Needed for using struct ip_mreq with recent glibc */

Definition at line 27 of file udp.c.

#define IPV6_ADD_MEMBERSHIP   IPV6_JOIN_GROUP

Definition at line 41 of file udp.c.

Referenced by udp_join_multicast_group().

#define IPV6_DROP_MEMBERSHIP   IPV6_LEAVE_GROUP

Definition at line 42 of file udp.c.

Referenced by udp_leave_multicast_group().

#define UDP_MAX_PKT_SIZE   65536

Definition at line 58 of file udp.c.

Referenced by udp_open().

#define UDP_TX_BUF_SIZE   32768

Definition at line 57 of file udp.c.

Referenced by udp_open().

Function Documentation

int ff_udp_get_local_port ( URLContext h)

Return the local port used by the UDP connection.

Parameters
hmedia file context
Returns
the local port number

Definition at line 286 of file udp.c.

Referenced by ff_rtp_get_local_rtcp_port(), ff_rtp_get_local_rtp_port(), and rtp_open().

int ff_udp_set_remote_url ( URLContext h,
const char *  uri 
)

If no filename is given to av_open_input_file because you want to get the local port first, then you must call this function to set the remote server address.

url syntax: udp://host:port[?option=val...] option: 'ttl=n' : set the ttl value (for multicast only) 'localport=n' : set the local port 'pkt_size=n' : set max packet size 'reuse=1' : enable reusing the socket

Parameters
hmedia file context
uriof the remote server
Returns
zero if no error.

Definition at line 247 of file udp.c.

Referenced by ff_rtp_set_remote_url(), and udp_open().

static int udp_close ( URLContext h)
static

Definition at line 476 of file udp.c.

static int udp_get_file_handle ( URLContext h)
static

Return the udp file handle for select() usage to wait for several RTP streams at the same time.

Parameters
hmedia file context

Definition at line 297 of file udp.c.

static int udp_join_multicast_group ( int  sockfd,
struct sockaddr *  addr 
)
static

Definition at line 82 of file udp.c.

Referenced by udp_open().

static int udp_leave_multicast_group ( int  sockfd,
struct sockaddr *  addr 
)
static

Definition at line 111 of file udp.c.

Referenced by udp_close().

static int udp_open ( URLContext h,
const char *  uri,
int  flags 
)
static

Definition at line 305 of file udp.c.

static int udp_port ( struct sockaddr_storage addr,
int  addr_len 
)
static

Definition at line 219 of file udp.c.

Referenced by udp_open().

static int udp_read ( URLContext h,
uint8_t *  buf,
int  size 
)
static

Definition at line 441 of file udp.c.

static struct addrinfo* udp_resolve_host ( const char *  hostname,
int  port,
int  type,
int  family,
int  flags 
)
staticread

Definition at line 140 of file udp.c.

Referenced by udp_set_url(), and udp_socket_create().

static int udp_set_multicast_ttl ( int  sockfd,
int  mcastTTL,
struct sockaddr *  addr 
)
static

Definition at line 60 of file udp.c.

Referenced by udp_open().

static int udp_set_url ( struct sockaddr_storage addr,
const char *  hostname,
int  port 
)
static

Definition at line 167 of file udp.c.

Referenced by ff_udp_set_remote_url().

static int udp_socket_create ( UDPContext s,
struct sockaddr_storage addr,
int *  addr_len,
const char *  localaddr 
)
static

Definition at line 182 of file udp.c.

Referenced by udp_open().

static int udp_write ( URLContext h,
const uint8_t *  buf,
int  size 
)
static

Definition at line 455 of file udp.c.

Variable Documentation

URLProtocol ff_udp_protocol
Initial value:
{
.name = "udp",
.url_open = udp_open,
.url_read = udp_read,
.url_write = udp_write,
.url_close = udp_close,
.url_get_file_handle = udp_get_file_handle,
.priv_data_size = sizeof(UDPContext),
}

Definition at line 486 of file udp.c.