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[ipoib] Expose Ethernet-compatible eIPoIB link-layer addresses and headers

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Almost all clients of the raw-packet interfaces (UNDI and SNP) can
handle only Ethernet link layers.  Expose an Ethernet-compatible link
layer to local clients, while remaining compatible with IPoIB on the
wire.  This requires manipulation of ARP (but not DHCP) packets within
the IPoIB driver.

This is ugly, but it's the only viable way to allow IPoIB devices to
be driven via the raw-packet interfaces.

Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2012-08-29 23:34:14 +01:00
parent f54a61e434
commit 03f0c23f8b
8 changed files with 435 additions and 303 deletions
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12
src/net/udp/dhcp.c
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@@ -938,10 +938,18 @@ int dhcp_create_packet ( struct dhcp_packet *dhcppkt,
dhcphdr->magic = htonl ( DHCP_MAGIC_COOKIE );
dhcphdr->htype = ntohs ( netdev->ll_protocol->ll_proto );
dhcphdr->op = dhcp_op[msgtype];
dhcphdr->hlen = dhcp_chaddr ( netdev, dhcphdr->chaddr,
&dhcphdr->flags );
dhcphdr->hlen = netdev->ll_protocol->ll_addr_len;
memcpy ( dhcphdr->chaddr, netdev->ll_addr,
netdev->ll_protocol->ll_addr_len );
memcpy ( dhcphdr->options, options, options_len );
/* If the local link-layer address functions only as a name
* (i.e. cannot be used as a destination address), then
* request broadcast responses.
*/
if ( netdev->ll_protocol->flags & LL_NAME_ONLY )
dhcphdr->flags |= htons ( BOOTP_FL_BROADCAST );
/* If the network device already has an IPv4 address then
* unicast responses from the DHCP server may be rejected, so
* request broadcast responses.