net.c File Reference

#include "polarssl/config.h"
#include "polarssl/net.h"
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <sys/time.h>
#include <unistd.h>
#include <signal.h>
#include <fcntl.h>
#include <netdb.h>
#include <errno.h>
#include <endian.h>
#include <stdlib.h>
#include <stdio.h>
#include <time.h>
#include <inttypes.h>

Include dependency graph for net.c:

Go to the source code of this file.

Defines
#define	POLARSSL_HTONS(n)
#define	POLARSSL_HTONL(n)
#define	net_htons(n) POLARSSL_HTONS(n)
#define	net_htonl(n) POLARSSL_HTONL(n)
Functions
unsigned short	net_htons (unsigned short n)
unsigned long	net_htonl (unsigned long n)
int	net_connect (int fd, const char host, int port)
	Initiate a TCP connection with host:port.
int	net_bind (int fd, const char bind_ip, int port)
	Create a listening socket on bind_ip:port.
static int	net_is_blocking (void)
int	net_accept (int bind_fd, int client_fd, void client_ip)
	Accept a connection from a remote client.
int	net_set_block (int fd)
	Set the socket blocking.
int	net_set_nonblock (int fd)
	Set the socket non-blocking.
void	net_usleep (unsigned long usec)
	Portable usleep helper.
int	net_recv (void ctx, unsigned char buf, size_t len)
	Read at most 'len' characters.
int	net_send (void ctx, const unsigned char buf, size_t len)
	Write at most 'len' characters.
void	net_close (int fd)
	Gracefully shutdown the connection.

Define Documentation

#define net_htonl ( n ) POLARSSL_HTONL(n)

Definition at line 115 of file net.c.

Referenced by net_bind().

#define net_htons ( n ) POLARSSL_HTONS(n)

Definition at line 114 of file net.c.

Referenced by net_bind(), and net_connect().

#define POLARSSL_HTONL ( n )

Value:

((((unsigned long )(n) & 0xFF      ) << 24) | \
                           (((unsigned long )(n) & 0xFF00    ) << 8 ) | \
                           (((unsigned long )(n) & 0xFF0000  ) >> 8 ) | \
                           (((unsigned long )(n) & 0xFF000000) >> 24))

Definition at line 106 of file net.c.

#define POLARSSL_HTONS ( n )

Value:

((((unsigned short)(n) & 0xFF      ) << 8 ) | \
                           (((unsigned short)(n) & 0xFF00    ) >> 8 ))

Definition at line 104 of file net.c.

Function Documentation

int net_accept	(	int	bind_fd,
		int *	client_fd,
		void *	client_ip
	)

Accept a connection from a remote client.

Parameters:

	bind_fd	Relevant socket
	client_fd	Will contain the connected client socket
	client_ip	Will contain the client IP address

Returns:: 0 if successful, POLARSSL_ERR_NET_ACCEPT_FAILED, or POLARSSL_ERR_NET_WOULD_BLOCK is bind_fd was set to non-blocking and accept() is blocking.

Definition at line 261 of file net.c.

References net_is_blocking(), POLARSSL_ERR_NET_ACCEPT_FAILED, and POLARSSL_ERR_NET_WANT_READ.

int net_bind	(	int *	fd,
		const char *	bind_ip,
		int	port
	)

Create a listening socket on bind_ip:port.

If bind_ip == NULL, all interfaces are binded.

Parameters:

	fd	Socket to use
	bind_ip	IP to bind to, can be NULL
	port	Port number to use

Returns:: 0 if successful, or one of: POLARSSL_ERR_NET_SOCKET_FAILED, POLARSSL_ERR_NET_BIND_FAILED, POLARSSL_ERR_NET_LISTEN_FAILED

Definition at line 169 of file net.c.

References net_htonl, net_htons, POLARSSL_ERR_NET_BIND_FAILED, POLARSSL_ERR_NET_LISTEN_FAILED, POLARSSL_ERR_NET_SOCKET_FAILED, and POLARSSL_NET_LISTEN_BACKLOG.

void net_close ( int fd )

Gracefully shutdown the connection.

Parameters:

fd

The socket to close

Definition at line 391 of file net.c.

int net_connect	(	int *	fd,
		const char *	host,
		int	port
	)

Initiate a TCP connection with host:port.

Parameters:

	fd	Socket to use
	host	Host to connect to
	port	Port to connect to

Returns:: 0 if successful, or one of: POLARSSL_ERR_NET_SOCKET_FAILED, POLARSSL_ERR_NET_UNKNOWN_HOST, POLARSSL_ERR_NET_CONNECT_FAILED

Definition at line 120 of file net.c.

References net_htons, POLARSSL_ERR_NET_CONNECT_FAILED, POLARSSL_ERR_NET_SOCKET_FAILED, and POLARSSL_ERR_NET_UNKNOWN_HOST.

unsigned long net_htonl ( unsigned long n )

unsigned short net_htons ( unsigned short n )

static int net_is_blocking ( void ) [static]

Definition at line 238 of file net.c.

Referenced by net_accept(), net_recv(), and net_send().

int net_recv	(	void *	ctx,
		unsigned char *	buf,
		size_t	len
	)

Read at most 'len' characters.

If no error occurs, the actual amount read is returned.

Parameters:

	ctx	Socket
	buf	The buffer to write to
	len	Maximum length of the buffer

Returns:: This function returns the number of bytes received, or a non-zero error code; POLARSSL_ERR_NET_WANT_READ indicates read() is blocking.

Definition at line 331 of file net.c.

References net_is_blocking(), POLARSSL_ERR_NET_CONN_RESET, POLARSSL_ERR_NET_RECV_FAILED, and POLARSSL_ERR_NET_WANT_READ.

int net_send	(	void *	ctx,
		const unsigned char *	buf,
		size_t	len
	)

Write at most 'len' characters.

If no error occurs, the actual amount read is returned.

Parameters:

	ctx	Socket
	buf	The buffer to read from
	len	The length of the buffer

Returns:: This function returns the number of bytes sent, or a non-zero error code; POLARSSL_ERR_NET_WANT_WRITE indicates write() is blocking.

Definition at line 361 of file net.c.

References net_is_blocking(), POLARSSL_ERR_NET_CONN_RESET, POLARSSL_ERR_NET_SEND_FAILED, and POLARSSL_ERR_NET_WANT_WRITE.

int net_set_block ( int fd )

Set the socket blocking.

Parameters:

fd

Socket to set

Returns:: 0 if successful, or a non-zero error code

Definition at line 293 of file net.c.

int net_set_nonblock ( int fd )

Set the socket non-blocking.

Parameters:

fd

Socket to set

Returns:: 0 if successful, or a non-zero error code

Definition at line 304 of file net.c.

void net_usleep ( unsigned long usec )

Portable usleep helper.

Parameters:

usec

Amount of microseconds to sleep

Note:: Real amount of time slept will not be less than select()'s timeout granularity (typically, 10ms).

Definition at line 319 of file net.c.

net.c File Reference

Defines

Functions

Define Documentation

Function Documentation