Network sockets (ITI8510) - Redigeerimiste ajalugu

Irve – 24. november 2017, kell 16:29

2017-11-24T16:29:53Z

←Vanem redaktsioon		Redaktsioon: 24. november 2017, kell 18:29
12. rida:		12. rida:
	connect www.lambda.ee 80		connect www.lambda.ee 80
	would connect to www.lambda.ee on port 80. Write		would connect to www.lambda.ee on port 80. Write
	<nowiki>GET http://www.lambda.ee/wiki/ ~~HTTP1~~.0\n\n</nowiki>		<nowiki>GET http://www.lambda.ee/wiki/ HTTP/1.0\r\n\r\n</nowiki>
	to the socket and display any resulting data on screen. Terminate when connection is closed.		to the socket and display any resulting data on screen. Terminate when connection is closed.

Irve – 14. oktoober 2015, kell 09:32

2015-10-14T09:32:46Z

←Vanem redaktsioon		Redaktsioon: 14. oktoober 2015, kell 11:32
36. rida:		36. rida:
	nc -l 8080		nc -l 8080

	Note that you can only listen to ports starting from 1024.		Note that you can only listen to ports starting from 1024. In addition to that, the Dijkstra server has an external firewall which prevents connections from '''outside''' unless you listen on ports 7400-8000 .

Irve – 20. aprill 2012, kell 10:03

2012-04-20T10:03:05Z

←Vanem redaktsioon		Redaktsioon: 20. aprill 2012, kell 12:03
12. rida:		12. rida:
	connect www.lambda.ee 80		connect www.lambda.ee 80
	would connect to www.lambda.ee on port 80. Write		would connect to www.lambda.ee on port 80. Write
	"<nowiki>GET http://www.lambda.ee/wiki/ HTTP1.0\n\n</nowiki>"		<nowiki>GET http://www.lambda.ee/wiki/ HTTP1.0\n\n</nowiki>
	to the socket and display any resulting data on screen. Terminate when connection is closed.		to the socket and display any resulting data on screen. Terminate when connection is closed.

Irve: /* Connection */

2012-04-20T10:02:56Z

Connection

←Vanem redaktsioon		Redaktsioon: 20. aprill 2012, kell 12:02
11. rida:		11. rida:
	Write a program which tries connecting to a specified machine on specified port so the following command:		Write a program which tries connecting to a specified machine on specified port so the following command:
	connect www.lambda.ee 80		connect www.lambda.ee 80
	would connect to www.lambda.ee on port 80. Write "<nowiki>GET http://www.lambda.ee/wiki/ HTTP1.0\n\n</nowiki>" to the socket and display any resulting data on screen. Terminate when connection is closed.		would connect to www.lambda.ee on port 80. Write
			"<nowiki>GET http://www.lambda.ee/wiki/ HTTP1.0\n\n</nowiki>"
			to the socket and display any resulting data on screen. Terminate when connection is closed.

	=== Listening ===		=== Listening ===

Irve: /* Connection */

2012-04-20T10:02:45Z

Connection

←Vanem redaktsioon		Redaktsioon: 20. aprill 2012, kell 12:02
11. rida:		11. rida:
	Write a program which tries connecting to a specified machine on specified port so the following command:		Write a program which tries connecting to a specified machine on specified port so the following command:
	connect www.lambda.ee 80		connect www.lambda.ee 80
	would connect to www.lambda.ee on port 80. Write "GET http://www.lambda.ee/wiki/ HTTP1.0\n\n" to the socket and display any resulting data on screen. Terminate when connection is closed.		would connect to www.lambda.ee on port 80. Write "<nowiki>GET http://www.lambda.ee/wiki/ HTTP1.0\n\n</nowiki>" to the socket and display any resulting data on screen. Terminate when connection is closed.

	=== Listening ===		=== Listening ===

Irve – 20. aprill 2012, kell 10:02

2012-04-20T10:02:28Z

←Vanem redaktsioon		Redaktsioon: 20. aprill 2012, kell 12:02
11. rida:		11. rida:
	Write a program which tries connecting to a specified machine on specified port so the following command:		Write a program which tries connecting to a specified machine on specified port so the following command:
	connect www.lambda.ee 80		connect www.lambda.ee 80
	would connect to www.lambda.ee on port 80. Write "~~Hello, Networld!~~\n\n" to the socket and display any resulting data on screen. Terminate when connection is closed.		would connect to www.lambda.ee on port 80. Write "GET http://www.lambda.ee/wiki/ HTTP1.0\n\n" to the socket and display any resulting data on screen. Terminate when connection is closed.

	=== Listening ===		=== Listening ===

Irve – 20. aprill 2012, kell 09:07

2012-04-20T09:07:23Z

←Vanem redaktsioon		Redaktsioon: 20. aprill 2012, kell 11:07
23. rida:		23. rida:
	== Bonus ==		== Bonus ==

	If the former part of the exercises does not provide you with sufficient brain-stimulation. Please try the following: Create a program which outputs the output of "ls -l" to the network on the given socket when connected; using dup() or dup2() functions. It could work as follows:		If the former part of the exercises does not provide you with sufficient brain-stimulation. Please try the following: Create a program which outputs the output of "ls -l" to the network on the given socket when connected; using dup() or dup2() functions. For running a progam you could use fork() and execv(). It could work as follows:
	lsner 3333		lsner 3333

Irve – 20. aprill 2012, kell 09:04

2012-04-20T09:04:36Z

←Vanem redaktsioon		Redaktsioon: 20. aprill 2012, kell 11:04
20. rida:		20. rida:

	When connection is made, display the address of the other connection, then display the data until connection is closed.		When connection is made, display the address of the other connection, then display the data until connection is closed.

			== Bonus ==

			If the former part of the exercises does not provide you with sufficient brain-stimulation. Please try the following: Create a program which outputs the output of "ls -l" to the network on the given socket when connected; using dup() or dup2() functions. It could work as follows:
			lsner 3333

			And then you could try it out using netcat for example.

	== Tips ==		== Tips ==

Irve – 6. mai 2010, kell 11:56

2010-05-06T11:56:44Z

Uus lehekülg

''The goal is to try sending and receiving data over the socket interface''

You will use socket(), connect(), bind(), listen(), accept() and socket addresses for the task.

==Task==

There are two separate tasks.

=== Connection ===

Write a program which tries connecting to a specified machine on specified port so the following command:
connect www.lambda.ee 80
would connect to www.lambda.ee on port 80. Write "Hello, Networld!\n\n" to the socket and display any resulting data on screen. Terminate when connection is closed.

=== Listening ===

Write a server program which shows on screen whatever data is received from the network. The command line:
listen 3333
would listen on port 3333 and display any received connections.

When connection is made, display the address of the other connection, then display the data until connection is closed.

== Tips ==

Use netcat for connecting and listening to your program:
nc www.lambda.ee 80
nc -l 8080

Note that you can only listen to ports starting from 1024.