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| 12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
12 | ;; GNU GENERAL PUBLIC LICENSE ;; |
| 13 | ;; Version 2, June 1991 ;; |
13 | ;; Version 2, June 1991 ;; |
| 14 | ;; ;; |
14 | ;; ;; |
| 15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
15 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
| Line 16... | Line 16... | ||
| 16 | 16 | ||
| Line 17... | Line 17... | ||
| 17 | $Revision: 1483 $ |
17 | $Revision: 1484 $ |
| 18 | 18 | ||
| 19 | 19 | ||
| Line 66... | Line 66... | ||
| 66 | ; IN: Pointer to buffer in [esp] |
66 | ; IN: Pointer to buffer in [esp] |
| 67 | ; size of buffer in [esp+4] |
67 | ; size of buffer in [esp+4] |
| 68 | ; pointer to device struct in ebx |
68 | ; pointer to device struct in ebx |
| 69 | ; UDP Packet size in ecx |
69 | ; UDP Packet size in ecx |
| 70 | ; pointer to UDP Packet in edx |
70 | ; pointer to UDP Packet in edx |
| - | 71 | ; |
|
| - | 72 | ; esi = ipv4 source address |
|
| - | 73 | ; edi = ipv4 dest address |
|
| - | 74 | ; |
|
| 71 | ; OUT: / |
75 | ; OUT: / |
| 72 | ; |
76 | ; |
| 73 | ;----------------------------------------------------------------- |
77 | ;----------------------------------------------------------------- |
| 74 | align 4 |
78 | align 4 |
| 75 | UDP_handler: |
79 | UDP_handler: |
| Line 78... | Line 82... | ||
| 78 | 82 | ||
| 79 | ; First validate, checksum: |
83 | ; First validate, checksum: |
| 80 | cmp [edx + UDP_Packet.Checksum], 0 |
84 | cmp [edx + UDP_Packet.Checksum], 0 |
| Line -... | Line 85... | ||
| - | 85 | jz .no_checksum |
|
| - | 86 | ||
| 81 | jz .no_checksum |
87 | xchg edi, esi ; save ipv4 source address so we can look it up later |
| Line 82... | Line 88... | ||
| 82 | 88 | ||
| 83 | push edx |
89 | push edx |
| 84 | 90 | ||
| 85 | push esi |
91 | push esi |
| Line 86... | Line 92... | ||
| 86 | push edi |
92 | push edi |
| Line 87... | Line 93... | ||
| 87 | mov esi, edx |
93 | mov esi, edx |
| 88 | call UDP_checksum |
94 | call UDP_checksum ; this destroys edx, ecx and esi (but not edi! :) |
| Line 120... | Line 126... | ||
| 120 | ; I bind to, if the socket is opened with a destination IP address of |
126 | ; I bind to, if the socket is opened with a destination IP address of |
| 121 | ; 255.255.255.255 |
127 | ; 255.255.255.255 |
| 122 | cmp [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], 0xffffffff |
128 | cmp [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], 0xffffffff |
| 123 | je .ok1 |
129 | je .ok1 |
| Line 124... | Line -... | ||
| 124 | - | ||
| 125 | ; mov esi, [esp] ; start of data (ethernet header) |
- | |
| 126 | ; mov esi, [esi + ETH_FRAME.Data + IPv4_Packet.SourceAddress] ; get the Source address from the IP Packet FIXME |
130 | |
| 127 | cmp [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], edi ;esi |
131 | cmp [eax + SOCKET_head.end + IPv4_SOCKET.RemoteIP], edi ; edi is IPv4 destination address |
| Line 128... | Line 132... | ||
| 128 | jne .try_more ; Quit if the source IP is not valid, check for more sockets with this IP/PORT combination |
132 | jne .try_more ; Quit if the source IP is not valid, check for more sockets with this IP/PORT combination |
| 129 | 133 | ||