badpork/kolibrios
1
0
Fork 0
forked from KolibriOS/kolibrios
Code Pull Requests Activity

Looks like I uploaded wrong udp.inc in previous revision...

Browse Source 
git-svn-id: svn://kolibrios.org@1484 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
hidnplayr 2010-06-07 14:17:36 +00:00
parent e4b0f6f30d
commit 9cbcb28cd1
1 changed files with 12 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
kernel/branches/net/network/udp.inc
View File

@ -68,6 +68,10 @@ UDP_init:
; pointer to device struct in ebx
; UDP Packet size in ecx
; pointer to UDP Packet in edx
;
; esi = ipv4 source address
; edi = ipv4 dest address
;
; OUT: /
;
;-----------------------------------------------------------------
@ -77,20 +81,22 @@ UDP_handler:
DEBUGF 1,"UDP_Handler, checksum:%x, size:%u\n", [edx+UDP_Packet.Checksum]:4, ecx
; First validate, checksum:
cmp [edx + UDP_Packet.Checksum], 0
jz .no_checksum
cmp [edx + UDP_Packet.Checksum], 0
jz .no_checksum
xchg edi, esi ; save ipv4 source address so we can look it up later
push edx
push esi
push edi
mov esi, edx
call UDP_checksum
call UDP_checksum ; this destroys edx, ecx and esi (but not edi! :)
pop edx
cmp [edx + UDP_Packet.Checksum], 0
jnz .checksum_mismatch
cmp [edx + UDP_Packet.Checksum], 0
jnz .checksum_mismatch
.no_checksum:
DEBUGF 1,"UDP Checksum is correct\n"
@ -122,9 +128,7 @@ UDP_handler:
cmp [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], 0xffffffff
je .ok1
; mov esi, [esp] ; start of data (ethernet header)
; mov esi, [esi + ETH_FRAME.Data + IPv4_Packet.SourceAddress] ; get the Source address from the IP Packet FIXME
cmp [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], edi ;esi
cmp [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], edi ; edi is IPv4 destination address
jne .try_more ; Quit if the source IP is not valid, check for more sockets with this IP/PORT combination