forked from KolibriOS/kolibrios
Added some comments to TCP server demo app.
git-svn-id: svn://kolibrios.org@7108 a494cfbc-eb01-0410-851d-a64ba20cac60
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@ -1,9 +1,9 @@
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; ;;
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;; Copyright (C) KolibriOS team 2010-2015. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2010-2017. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License ;;
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;; ;;
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;; tcpserv.asm - TCP demo program for KolibriOS ;;
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;; tcpserv.asm - TCP server demo program for KolibriOS ;;
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;; ;;
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;; Written by hidnplayr@kolibrios.org ;;
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;; ;;
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@ -46,46 +46,59 @@ start:
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invoke con_start, 1
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invoke con_init, 80, 25, 80, 25, title
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; Set event mask to socket events only
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mcall 40, EVM_STACK
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; Write message str1 to the console
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invoke con_write_asciiz, str1
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; Allocate a TCP socket
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mcall socket, AF_INET4, SOCK_STREAM, 0
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cmp eax, -1
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je sock_err
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; Socket allocation succeeded, store it's number in socketnum
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mov [socketnum], eax
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; This socket option is not implemented in kernel yet.
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; This might be needed in the future,
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; SO_REUSEADDR option is not implemented in kernel yet.
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; mcall setsockopt, [socketnum], SOL_SOCKET, SO_REUSEADDR, &yes,
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; cmp eax, -1
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; je opt_err
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; Bind the socket to port 23 (as defined in sockaddr1)
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mcall bind, [socketnum], sockaddr1, sockaddr1.length
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cmp eax, -1
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je bind_err
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mcall listen, [socketnum], 10 ; Backlog = 10
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; Start listening for incoming connections, with a backlog of max 1
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mcall listen, [socketnum], 1
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cmp eax, -1
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je listen_err
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; Write message str2 to the console
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invoke con_write_asciiz, str2
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; (Wait for and) accept incoming connection
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mcall accept, [socketnum], sockaddr1, sockaddr1.length
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cmp eax, -1
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je acpt_err
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; We have a new incoming connection, store the new socket number in socketnum2
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mov [socketnum2], eax
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; Send a message on the incoming connection
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mcall send, [socketnum2], hello, hello.length
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; Print the received data to the console, untill socket is closed by remote end
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.loop:
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mcall recv, [socketnum2], buffer, buffer.length, 0
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mcall recv, [socketnum2], buffer, BUFFERSIZE, 0
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cmp eax, -1
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je .loop
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mov byte[buffer+eax], 0
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mov byte[buffer+eax], 0 ; Zero-terminate the data, so we can print it
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invoke con_write_asciiz, buffer
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jmp .loop
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; Print error message
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acpt_err:
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invoke con_write_asciiz, str8
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jmp done
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@ -102,18 +115,25 @@ sock_err:
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invoke con_write_asciiz, str6
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jmp done
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done:
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invoke con_getch2 ; Wait for user input
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; Wait for user input
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invoke con_getch2
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; Close console
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invoke con_exit, 1
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exit:
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; Close listening socket, if it is open
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cmp [socketnum], 0
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je @f
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mcall close, [socketnum]
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@@:
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; Close second socket, if it is open
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cmp [socketnum2], 0
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je @f
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mcall close, [socketnum2]
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@@:
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; Close application
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mcall -1
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@ -133,7 +153,7 @@ hello db 'Hello world!',0
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.length = $ - hello
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sockaddr1:
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dw AF_INET4
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dw AF_INET4 ; IPv4
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.port dw 23 shl 8 ; port 23 - network byte order
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.ip dd 0
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rb 10
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@ -160,7 +180,6 @@ i_end:
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socketnum dd 0
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socketnum2 dd 0
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buffer rb BUFFERSIZE
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.length = BUFFERSIZE
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align 4
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rb 4096 ; stack
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