WebSVN – Kolibri OS – Diff – /kernel/branches/net/applications/libraries/network/network.asm



;       query class = IN (internet IPv4 address) = 1
; Note that network byte order is big-endian.
	mov	eax, 0x01000100
	stosd
; 7. Get DNS server address.
	mcall	76, 0x00000004 ; protocol IP=0, device number=0, function=get DNS address
	cmp	eax, -1
	je	.ret.dnserr
	mov	esi, eax	; put server address to esi
; 8. Open UDP socketnum to DNS server, port 53.
; 8a. Create new socketnum.
	mcall	75, 0, AF_INET4, SOCK_DGRAM
	cmp	eax, -1 ; error?
	jz	.ret.dnserr
	mov	ecx, eax	; put socketnum handle to ecx
; 8b. Create sockaddr structure on the stack.
	push	0
	push	0	; sin_zero
	push	esi	; sin_addr
	push	AF_INET4 + (53 shl 16)
			; sin_family and sin_port in network byte order
; 8c. Connect.
	mcall	75, 4, , esp, sizeof.sockaddr_in
; 8d. Restore the stack, undo 8b.
	add	esp, esi
; 8e. Check result.
	cmp	eax, -1
	jz	.ret.close
; 9. Send DNS request packet.
	sub	edi, esp	; get packet length
	mov	esi, edi
	xor	edi, edi
	mcall	75, 6, , esp
	cmp	eax, -1
	jz	.ret.close
	mov	eax, [.reqdata]
	mov	[eax+__gai_reqdata.socketnum], ecx
	push	-1
	pop	eax	; return status: more processing required
	jmp	.ret.dns
.ret.close:
	mcall	75, 1
.ret.dnserr:
	push	EAI_AGAIN
	pop	eax
.ret.dns:
; 6. Restore stack pointer and return.

	push	ebx esi edi
	mov	edi, [.reqdata]
; 2. Read UDP datagram.
	mov	ecx, [edi+__gai_reqdata.socketnum]
	push	edi
	mcall	75, 7, , , 512, 0
	pop	edi
; 3. Ignore events for other socketnums (return if no data read)
	test	eax, eax
	jz	.ret.more_processing_required
; 4. Sanity check: discard too short packets.

.ret.close:
; 15. Close socketnum.
	push	eax
	mov	ecx, [.reqdata]
	mov	ecx, [ecx+__gai_reqdata.socketnum]
	mcall	75, 1
	pop	eax
; 16. Restore used registers, destroy stack frame and return.
.ret:
	pop	edi esi ebx
	mov	esp, ebp

; 0. Save used registers for __stdcall.
	push	ebx
; 1. Allocated resources: only socketnum, so close it and return.
	mov	eax, [esp+8]
	mov	ecx, [eax+__gai_reqdata.socketnum]
	mcall	75, 1
; 2. Restore used registers and return.
	pop	ebx
	ret	4

 

Rev 2314	Rev 2364
Line 674...	Line 674...
674	; query class = IN (internet IPv4 address) = 1	674	; query class = IN (internet IPv4 address) = 1
675	; Note that network byte order is big-endian.	675	; Note that network byte order is big-endian.
676	mov eax, 0x01000100	676	mov eax, 0x01000100
677	stosd	677	stosd
678	; 7. Get DNS server address.	678	; 7. Get DNS server address.
679	mcall 75, 0x00000004 ; protocol IP=0, device number=0, function=get DNS address	679	mcall 76, 0x00000004 ; protocol IP=0, device number=0, function=get DNS address
680	cmp eax, -1	680	cmp eax, -1
681	je .ret.dnserr	681	je .ret.dnserr
682	mov esi, eax ; put server address to esi	682	mov esi, eax ; put server address to esi
683	; 8. Open UDP socketnum to DNS server, port 53.	683	; 8. Open UDP socketnum to DNS server, port 53.
684	; 8a. Create new socketnum.	684	; 8a. Create new socketnum.
685	mcall 74, 0, AF_INET4, SOCK_DGRAM	685	mcall 75, 0, AF_INET4, SOCK_DGRAM
686	cmp eax, -1 ; error?	686	cmp eax, -1 ; error?
687	jz .ret.dnserr	687	jz .ret.dnserr
688	mov ecx, eax ; put socketnum handle to ecx	688	mov ecx, eax ; put socketnum handle to ecx
689	; 8b. Create sockaddr structure on the stack.	689	; 8b. Create sockaddr structure on the stack.
690	push 0	690	push 0
691	push 0 ; sin_zero	691	push 0 ; sin_zero
692	push esi ; sin_addr	692	push esi ; sin_addr
693	push AF_INET4 + (53 shl 16)	693	push AF_INET4 + (53 shl 16)
694	; sin_family and sin_port in network byte order	694	; sin_family and sin_port in network byte order
695	; 8c. Connect.	695	; 8c. Connect.
696	mcall 74, 4, , esp, sizeof.sockaddr_in	696	mcall 75, 4, , esp, sizeof.sockaddr_in
697	; 8d. Restore the stack, undo 8b.	697	; 8d. Restore the stack, undo 8b.
698	add esp, esi	698	add esp, esi
699	; 8e. Check result.	699	; 8e. Check result.
700	cmp eax, -1	700	cmp eax, -1
701	jz .ret.close	701	jz .ret.close
702	; 9. Send DNS request packet.	702	; 9. Send DNS request packet.
703	sub edi, esp ; get packet length	703	sub edi, esp ; get packet length
704	mov esi, edi	704	mov esi, edi
705	xor edi, edi	705	xor edi, edi
706	mcall 74, 6, , esp	706	mcall 75, 6, , esp
707	cmp eax, -1	707	cmp eax, -1
708	jz .ret.close	708	jz .ret.close
709	mov eax, [.reqdata]	709	mov eax, [.reqdata]
710	mov [eax+__gai_reqdata.socketnum], ecx	710	mov [eax+__gai_reqdata.socketnum], ecx
711	push -1	711	push -1
712	pop eax ; return status: more processing required	712	pop eax ; return status: more processing required
713	jmp .ret.dns	713	jmp .ret.dns
714	.ret.close:	714	.ret.close:
715	mcall 74, 1	715	mcall 75, 1
716	.ret.dnserr:	716	.ret.dnserr:
717	push EAI_AGAIN	717	push EAI_AGAIN
718	pop eax	718	pop eax
719	.ret.dns:	719	.ret.dns:
720	; 6. Restore stack pointer and return.	720	; 6. Restore stack pointer and return.
Line 760...	Line 760...
760	push ebx esi edi	760	push ebx esi edi
761	mov edi, [.reqdata]	761	mov edi, [.reqdata]
762	; 2. Read UDP datagram.	762	; 2. Read UDP datagram.
763	mov ecx, [edi+__gai_reqdata.socketnum]	763	mov ecx, [edi+__gai_reqdata.socketnum]
764	push edi	764	push edi
765	mcall 74, 7, , , 512, 0	765	mcall 75, 7, , , 512, 0
766	pop edi	766	pop edi
767	; 3. Ignore events for other socketnums (return if no data read)	767	; 3. Ignore events for other socketnums (return if no data read)
768	test eax, eax	768	test eax, eax
769	jz .ret.more_processing_required	769	jz .ret.more_processing_required
770	; 4. Sanity check: discard too short packets.	770	; 4. Sanity check: discard too short packets.
Line 921...	Line 921...
921	.ret.close:	921	.ret.close:
922	; 15. Close socketnum.	922	; 15. Close socketnum.
923	push eax	923	push eax
924	mov ecx, [.reqdata]	924	mov ecx, [.reqdata]
925	mov ecx, [ecx+__gai_reqdata.socketnum]	925	mov ecx, [ecx+__gai_reqdata.socketnum]
926	mcall 74, 1	926	mcall 75, 1
927	pop eax	927	pop eax
928	; 16. Restore used registers, destroy stack frame and return.	928	; 16. Restore used registers, destroy stack frame and return.
929	.ret:	929	.ret:
930	pop edi esi ebx	930	pop edi esi ebx
931	mov esp, ebp	931	mov esp, ebp
Line 1221...	Line 1221...
1221	; 0. Save used registers for __stdcall.	1221	; 0. Save used registers for __stdcall.
1222	push ebx	1222	push ebx
1223	; 1. Allocated resources: only socketnum, so close it and return.	1223	; 1. Allocated resources: only socketnum, so close it and return.
1224	mov eax, [esp+8]	1224	mov eax, [esp+8]
1225	mov ecx, [eax+__gai_reqdata.socketnum]	1225	mov ecx, [eax+__gai_reqdata.socketnum]
1226	mcall 74, 1	1226	mcall 75, 1
1227	; 2. Restore used registers and return.	1227	; 2. Restore used registers and return.
1228	pop ebx	1228	pop ebx
1229	ret 4	1229	ret 4
Line 1230...	Line 1230...
1230		1230

Subversion Repositories Kolibri OS

(root)/kernel/branches/net/applications/libraries/network/network.asm – Rev 2314 → 2364