IPC@CHIP Documentation - SC12 @CHIP-RTOS V1.10

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packet. The input parameter to the callback function allows access to the ARP packet. Inside of this function
the user is able to check the content of the incoming ARP packet and decide whether the TCP/IP stack should
process this packet or ignore it. If the callback function returns -1, the incoming packet will be ignored by the
TCP/IP stack.
For structure of an ARP packet see ArpHeader.
To remove the callback function, this API call must be called with a null pointer in ES:DI. Do not forget to
uninstall the callback, if your application exits!
Interrupt 0xAC service 0x80: ADD_DEFAULT_GATEWAY, Add the default gateway
Parameters
AH
BX
ES:DI
DX:SI
This function is used to add the default gateway for all interfaces.
0x80 (= ADD_DEFAULT_GATEWAY)
Device entry of the gateway, 0: Ethernet, 1: PPP server, 2: PPP client, 3: User device driver
Pointer to an unsigned long containing the gateway IP in network byte order.
If BX == 3 DX:SI must contain User device handle pointer.
Return Value
Comments
DX: 0, AX 0 success
DX: -1, AX contains error code
If this function is used, the gateway entry in the chip.ini becomes invalidated, but unchanged.
If the PPP server or PPP client is specified in BX, the gateway is set to the remote peer IP address.
Related Topics
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DEL_DEFAULT_GATEWAY API function
DEV_OPEN_IFACE API function
IP Gateway chip.ini Configuration
PPP server Gateway chip.ini Configuration
Interrupt 0xAC service 0x81: DEL_DEFAULT_GATEWAY, Delete the default gateway
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