sizeof ether_header is 2 * ETHER_ADDR_LEN + 2 (14) bytes long
sizeof ether_addr is ETHER_ADDR_LEN bytes long
On arm, this shows that struct ether_addr needs to be __packed.
The first condition muts be true for the bridging code to not dump core.
The second one appears to be implicitly relied upon by wi (but many
of the rids it sends down likely need __packed too to be safe) and
maybe others. It appears to not hurt anything.
processing are forced to toggle this functionality when the card
is put in and out of promiscuous mode. The main reason for this
is because the hardware strips the VLAN tag, making it impossible
for the tag information to show up in network diagnostic tools like
tcpdump(1).
This change introduces ether_vlan_mtap(), which is called if the
mbuf has M_VLANTAG set. VLAN information is extracted from the
mbuf and inserted into a stack allocated ether vlan header which
is then inserted through the bpf machinery via bpf_mtap2(). The
original mbuf's data pointer and lengths are temporarily adjusted
to eliminate the original Ethernet header for the duration of the
tap operation. This should have no long term effects on the mbuf.
Also, define a new macro, ETHER_BPF_MTAP which should be used
by drivers which support hardware offload of VLAN tag processing.
The fixes for the relevant drivers will follow shortly.
Discussed with: rwatson, andre, jhb (and others)
Much feedback from: sam, ru
MFC after: 1 month [1]
[1] The version that is eventually MFCed will be somewhat
different then this, as there has been significant work
done to the VLAN code in HEAD.
constratins on arm; this fixes bridging when packets are
rx'd so ip headers are 32-bit aligned
Reviewed by: imp (and discussed elsewhere)
MFC after: 2 weeks
little/big endian fashion, so that network drivers can just reference
the standard implementation and don't have to bring their own.
As discussed on arch@.
Obtained from: NetBSD
o ETHER_* (ETHER_ALIGN, ETHER_MAX_FRAME, ETHER_CRC_LEN, etc.)
o M_HASFCS for drivers to indicate packets include FCS
o remove global declarations for ng_ether* and vlan_* since these
represent a private contract between the if_ethersubr.c code and
certain parts of the system that should not normally be abused
o add ether_* declarations that were elsewhere
o remove ETHER_BPF_* since they are no longer used with the parameter
no longer passed to ether_ifattach and ether_ifdetach
Reviewed by: many
Approved by: re
ether_ifdetach().
The former consolidates the operations of if_attach(), ng_ether_attach(),
and bpfattach(). The latter consolidates the corresponding detach operations.
Reviewed by: julian, freebsd-net
This means 'options NETGRAPH' is no longer necessary in order to get
netgraph-enabled Ethernet interfaces. This supports loading/unloading
the ng_ether.ko and attaching/detaching the Ethernet interface in any
order.
Add two new hooks 'upper' and 'lower' to allow access to the protocol
demux engine and the raw device, respectively. This enables bridging
to be defined as a netgraph node, if so desired.
Reviewed by: freebsd-net@freebsd.org
is an application space macro and the applications are supposed to be free
to use it as they please (but cannot). This is consistant with the other
BSD's who made this change quite some time ago. More commits to come.
work reliably yet (I've had panics), but it does seem to occasionally
be able to transmit and receive syntactically-correct packets.
Also fixes one of if_ethersubr.c's legion style bugs, and removes
the hostcache code from standard kernels---the code that depends on it
is not going to happen any time soon, I'm afraid.
This will make a number of things easier in the future, as well as (finally!)
avoiding the Id-smashing problem which has plagued developers for so long.
Boy, I'm glad we're not using sup anymore. This update would have been
insane otherwise.
- C++ should be supported for application functions (use __BEGIN_DECLS,
etc.).
- prototypes should be sorted.
- comments on #endif's should spell identifiers the same as the code.
- comments on #endif's should have the same sense as the code (use `!'
to match ifndef, etc.).
> wollman 96/12/10 09:19:15
>
> Modified: lib/libc/net ether_addr.c ethers.3
> Log:
> Get struct ether_addr directly from <net/ethernet.h> rather than pulling
> in lots of unrelated junk from <net/if.h> and <net/if_ether.h>. These
> functions still aren't prototyped anywhere (but should be in
> <net/ethernet.h>---got that, Bill?).
(Note that this file has no copyright header; one should probably
be added.)
