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[undi] Fill in ProtType correctly in PXENV_UNDI_ISR

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Determine the network-layer packet type and fill it in for UNDI
clients.  This is required by some NBPs such as emBoot's winBoot/i.

This change requires refactoring the link-layer portions of the
gPXE netdevice API, so that it becomes possible to strip the
link-layer header without passing the packet up the network stack.
This commit is contained in:
Michael Brown
2008-08-20 03:21:37 +01:00
parent f6f6f626f7
commit 30fb3b3810
5 changed files with 145 additions and 65 deletions
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26
src/include/gpxe/netdevice.h
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@@ -76,7 +76,7 @@ struct ll_protocol {
/** Protocol name */
const char *name;
/**
* Transmit network-layer packet via network device
* Add link-layer header
*
* @v iobuf I/O buffer
* @v netdev Network device
@@ -85,24 +85,28 @@ struct ll_protocol {
* @ret rc Return status code
*
* This method should prepend in the link-layer header
* (e.g. the Ethernet DIX header) and transmit the packet.
* This method takes ownership of the I/O buffer.
* (e.g. the Ethernet DIX header).
*/
int ( * tx ) ( struct io_buffer *iobuf, struct net_device *netdev,
struct net_protocol *net_protocol,
const void *ll_dest );
int ( * push ) ( struct io_buffer *iobuf, struct net_device *netdev,
struct net_protocol *net_protocol,
const void *ll_dest );
/**
* Handle received packet
* Remove link-layer header
*
* @v iobuf I/O buffer
* @v netdev Network device
* @v net_proto Network-layer protocol, in network-byte order
* @v ll_source Source link-layer address
* @ret rc Return status code
*
* This method should strip off the link-layer header
* (e.g. the Ethernet DIX header) and pass the packet to
* net_rx(). This method takes ownership of the packet
* buffer.
* (e.g. the Ethernet DIX header) and return the protocol and
* source link-layer address. The method must not alter the
* packet content, and may return the link-layer address as a
* pointer to data within the packet.
*/
int ( * rx ) ( struct io_buffer *iobuf, struct net_device *netdev );
int ( * pull ) ( struct io_buffer *iobuf, struct net_device *netdev,
uint16_t *net_proto, const void **ll_source );
/**
* Transcribe link-layer address
*