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Added some comments to TCP server demo app.

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git-svn-id: svn://kolibrios.org@7108 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2017-11-02 18:22:06 +00:00
parent b6bb3d2c62
commit 9da83c9e1b
1 changed files with 28 additions and 9 deletions
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37
programs/network/tcpserv/tcpserv.asm
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@ -1,9 +1,9 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;; ;; ;;
;; Copyright (C) KolibriOS team 2010-2015. All rights reserved. ;; ;; Copyright (C) KolibriOS team 2010-2017. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;; ;; Distributed under terms of the GNU General Public License ;;
;; ;; ;; ;;
;; tcpserv.asm - TCP demo program for KolibriOS ;; ;; tcpserv.asm - TCP server demo program for KolibriOS ;;
;; ;; ;; ;;
;; Written by hidnplayr@kolibrios.org ;; ;; Written by hidnplayr@kolibrios.org ;;
;; ;; ;; ;;
@ -46,46 +46,59 @@ start:
invoke con_start, 1 invoke con_start, 1
invoke con_init, 80, 25, 80, 25, title invoke con_init, 80, 25, 80, 25, title
; Set event mask to socket events only
mcall 40, EVM_STACK mcall 40, EVM_STACK
; Write message str1 to the console
invoke con_write_asciiz, str1 invoke con_write_asciiz, str1
; Allocate a TCP socket
mcall socket, AF_INET4, SOCK_STREAM, 0 mcall socket, AF_INET4, SOCK_STREAM, 0
cmp eax, -1 cmp eax, -1
je sock_err je sock_err
; Socket allocation succeeded, store it's number in socketnum
mov [socketnum], eax mov [socketnum], eax
; This socket option is not implemented in kernel yet. ; This might be needed in the future,
; SO_REUSEADDR option is not implemented in kernel yet.
; mcall setsockopt, [socketnum], SOL_SOCKET, SO_REUSEADDR, &yes, ; mcall setsockopt, [socketnum], SOL_SOCKET, SO_REUSEADDR, &yes,
; cmp eax, -1 ; cmp eax, -1
; je opt_err ; je opt_err
; Bind the socket to port 23 (as defined in sockaddr1)
mcall bind, [socketnum], sockaddr1, sockaddr1.length mcall bind, [socketnum], sockaddr1, sockaddr1.length
cmp eax, -1 cmp eax, -1
je bind_err je bind_err
mcall listen, [socketnum], 10 ; Backlog = 10 ; Start listening for incoming connections, with a backlog of max 1
mcall listen, [socketnum], 1
cmp eax, -1 cmp eax, -1
je listen_err je listen_err
; Write message str2 to the console
invoke con_write_asciiz, str2 invoke con_write_asciiz, str2
; (Wait for and) accept incoming connection
mcall accept, [socketnum], sockaddr1, sockaddr1.length mcall accept, [socketnum], sockaddr1, sockaddr1.length
cmp eax, -1 cmp eax, -1
je acpt_err je acpt_err
; We have a new incoming connection, store the new socket number in socketnum2
mov [socketnum2], eax mov [socketnum2], eax
; Send a message on the incoming connection
mcall send, [socketnum2], hello, hello.length mcall send, [socketnum2], hello, hello.length
; Print the received data to the console, untill socket is closed by remote end
.loop: .loop:
mcall recv, [socketnum2], buffer, buffer.length, 0 mcall recv, [socketnum2], buffer, BUFFERSIZE, 0
cmp eax, -1 cmp eax, -1
je .loop je .loop
mov byte[buffer+eax], 0 mov byte[buffer+eax], 0 ; Zero-terminate the data, so we can print it
invoke con_write_asciiz, buffer invoke con_write_asciiz, buffer
jmp .loop jmp .loop
; Print error message
acpt_err: acpt_err:
invoke con_write_asciiz, str8 invoke con_write_asciiz, str8
jmp done jmp done
@ -102,18 +115,25 @@ sock_err:
invoke con_write_asciiz, str6 invoke con_write_asciiz, str6
jmp done jmp done
done: done:
invoke con_getch2 ; Wait for user input ; Wait for user input
invoke con_getch2
; Close console
invoke con_exit, 1 invoke con_exit, 1
exit: exit:
; Close listening socket, if it is open
cmp [socketnum], 0 cmp [socketnum], 0
je @f je @f
mcall close, [socketnum] mcall close, [socketnum]
@@: @@:
; Close second socket, if it is open
cmp [socketnum2], 0 cmp [socketnum2], 0
je @f je @f
mcall close, [socketnum2] mcall close, [socketnum2]
@@: @@:
; Close application
mcall -1 mcall -1
@ -133,7 +153,7 @@ hello db 'Hello world!',0
.length = $ - hello .length = $ - hello
sockaddr1: sockaddr1:
dw AF_INET4 dw AF_INET4 ; IPv4
.port dw 23 shl 8 ; port 23 - network byte order .port dw 23 shl 8 ; port 23 - network byte order
.ip dd 0 .ip dd 0
rb 10 rb 10
@ -160,7 +180,6 @@ i_end:
socketnum dd 0 socketnum dd 0
socketnum2 dd 0 socketnum2 dd 0
buffer rb BUFFERSIZE buffer rb BUFFERSIZE
.length = BUFFERSIZE
align 4 align 4
rb 4096 ; stack rb 4096 ; stack