mdi_tcp.c File Reference

TCP communication implementation. More...

#include <netinet/in.h>
#include <sys/socket.h>
#include <netdb.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <errno.h>
#include "mdi.h"
#include "mdi_tcp.h"
#include "mdi_global.h"

Functions
void	sigint_handler (int dummy)
	SIGINT handler to ensure the socket is closed on termination. More...
int	enable_tcp_support (int code_id)
	Enable support for the TCP method.
int	tcp_on_selection ()
	Callback when the end-user selects TCP as the method.
int	tcp_on_accept_communicator ()
	Callback when the TCP method must accept a communicator.
int	tcp_on_send_command (const char *command, MDI_Comm comm, int *skip_flag)
	Callback when the TCP method must send a command.
int	tcp_after_send_command (const char *command, MDI_Comm comm)
	Callback after the TCP method has received a command.
int	tcp_on_recv_command (MDI_Comm comm)
	Callback when the TCP method must receive a command.
int	tcp_listen (int port_in)
	Begin listening for incoming TCP connections. More...
int	tcp_request_connection (int port_in, char *hostname_ptr)
	Request a connection over TCP. More...
int	tcp_accept_connection ()
	Accept a TCP connection request.
int	tcp_send (const void *buf, int count, MDI_Datatype datatype, MDI_Comm comm, int msg_flag)
	Send data through an MDI connection, using TCP. More...
int	tcp_recv (void *buf, int count, MDI_Datatype datatype, MDI_Comm comm, int msg_flag)
	Receive data through an MDI connection, using TCP. More...

Detailed Description

TCP communication implementation.

Function Documentation

sigint_handler()

void sigint_handler

(

int

dummy

)

SIGINT handler to ensure the socket is closed on termination.

Parameters

[in]

dummy

Dummy argument.

tcp_listen()

int tcp_listen

(

int

port_in

)

Begin listening for incoming TCP connections.

Parameters

[in]

port

Port to listen over

tcp_recv()

int tcp_recv	(	void *	buf,
		int	count,
		MDI_Datatype	datatype,
		MDI_Comm	comm,
		int	msg_flag
	)

Receive data through an MDI connection, using TCP.

Parameters

[in]	buf	Pointer to the buffer where the received data will be stored.
[in]	count	Number of values (integers, double precision floats, characters, etc.) to be received.
[in]	datatype	MDI handle (MDI_INT, MDI_DOUBLE, MDI_CHAR, etc.) corresponding to the type of data to be received.
[in]	comm	MDI communicator associated with the connection to the sending code.
[in]	msg_flag	Type of role this data has within a message. 0: Not part of a message. 1: The header of a message. 2: The body (data) of a message.

tcp_request_connection()

int tcp_request_connection	(	int	port_in,
		char *	hostname_ptr
	)

Request a connection over TCP.

Parameters

[in]	port	Port over which the driver is listening
[in]	hostname_ptr	Hostname of the driver

tcp_send()

int tcp_send	(	const void *	buf,
		int	count,
		MDI_Datatype	datatype,
		MDI_Comm	comm,
		int	msg_flag
	)

Send data through an MDI connection, using TCP.

Parameters

[in]	buf	Pointer to the data to be sent.
[in]	count	Number of values (integers, double precision floats, characters, etc.) to be sent.
[in]	datatype	MDI handle (MDI_INT, MDI_DOUBLE, MDI_CHAR, etc.) corresponding to the type of data to be sent.
[in]	comm	MDI communicator associated with the intended recipient code.
[in]	msg_flag	Type of role this data has within a message. 0: Not part of a message. 1: The header of a message. 2: The body (data) of a message.