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YOSHIFUJI Hideaki / 吉藤英明 6752c8db8e firewire net, ipv4 arp: Extend hardware address and remove driver-level packet inspection. 
Inspection of upper layer protocol is considered harmful, especially
if it is about ARP or other stateful upper layer protocol; driver
cannot (and should not) have full state of them.

IPv4 over Firewire module used to inspect ARP (both in sending path
and in receiving path), and record peer's GUID, max packet size, max
speed and fifo address.  This patch removes such inspection by extending
our "hardware address" definition to include other information as well:
max packet size, max speed and fifo.  By doing this, The neighbour
module in networking subsystem can cache them.

Note: As we have started ignoring sspd and max_rec in ARP/NDP, those
      information will not be used in the driver when sending.

When a packet is being sent, the IP layer fills our pseudo header with
the extended "hardware address", including GUID and fifo.  The driver
can look-up node-id (the real but rather volatile low-level address)
by GUID, and then the module can send the packet to the wire using
parameters provided in the extendedn hardware address.

This approach is realistic because IP over IEEE1394 (RFC2734) and IPv6
over IEEE1394 (RFC3146) share same "hardware address" format
in their address resolution protocols.

Here, extended "hardware address" is defined as follows:

union fwnet_hwaddr {
	u8 u[16];
	struct {
		__be64 uniq_id;		/* EUI-64			*/
		u8 max_rec;		/* max packet size		*/
		u8 sspd;		/* max speed			*/
		__be16 fifo_hi;		/* hi 16bits of FIFO addr	*/
		__be32 fifo_lo;		/* lo 32bits of FIFO addr	*/
	} __packed uc;
};

Note that Hardware address is declared as union, so that we can map full
IP address into this, when implementing MCAP (Multicast Cannel Allocation
Protocol) for IPv6, but IP and ARP subsystem do not need to know this
format in detail.

One difference between original ARP (RFC826) and 1394 ARP (RFC2734)
is that 1394 ARP Request/Reply do not contain the target hardware address
field (aka ar$tha).  This difference is handled in the ARP subsystem.

CC: Stephan Gatzka <stephan.gatzka@gmail.com>
Signed-off-by: YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
 		2013-03-26 12:32:13 -04:00
..
9p 9p: turn fid->dlist into hlist 2013-02-27 22:51:08 -05:00
bluetooth Bluetooth: Keep track of UUID type upon addition 2013-02-01 15:50:17 -02:00
caif caif: remove caif_shm 2013-03-17 12:16:38 -04:00
irda treewide: Replace incomming with incoming in all comments and strings 2013-01-03 16:15:49 +01:00
iucv af_iucv: add shutdown for HS transport 2012-03-07 22:52:24 -08:00
netfilter netfilter: nf_conntrack: speed up module removal path if netns in use 2013-03-19 17:08:31 +01:00
netns ipv6: provide addr and netconf dump consistency info 2013-03-24 17:16:29 -04:00
nfc NFC: Initial Secure Element API 2013-01-10 00:51:54 +01:00
phonet net: remove my future former mail address 2012-06-17 16:29:38 -07:00
sctp hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
tc_act
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act_api.h act_police: move struct tcf_police to act_police.c 2013-02-12 18:59:45 -05:00
addrconf.h ipv4: introduce address lifetime 2013-01-29 13:59:57 -05:00
af_ieee802154.h
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af_rxrpc.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
af_unix.h unix: Remove unused field from unix_sock 2012-10-21 20:37:06 -04:00
ah.h
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arp.h net: Dont use ifindices in hash fns 2012-08-09 16:18:06 -07:00
atmclip.h atm: clip: Use device neigh support on top of "arp_tbl". 2011-11-30 18:51:03 -05:00
ax25.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
ax88796.h
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cfg80211-wext.h cfg80211: remove unused wext handler exports 2011-08-08 14:26:29 -04:00
cfg80211.h cfg80211: rename mesh station types 2013-03-06 16:36:11 +01:00
checksum.h net: core: add function for incremental IPv6 pseudo header checksum updates 2012-08-30 03:00:16 +02:00
cipso_ipv4.h cipso: handle CIPSO options correctly when NetLabel is disabled 2012-06-01 14:18:29 -04:00
cls_cgroup.h net: Update args to dummy sock_update_classid(). 2012-10-26 05:07:00 -04:00
codel.h codel: refine one condition to avoid a nul rec_inv_sqrt 2012-08-10 16:52:54 -07:00
compat.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
datalink.h
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dcbevent.h dcb: Add stub routines for !CONFIG_DCB 2011-10-06 15:49:51 -04:00
dcbnl.h net/dcb: Add an optional max rate attribute 2012-04-05 05:08:04 -04:00
dn.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
dn_dev.h
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dn_fib.h decnet: Parse netlink attributes on our own 2013-03-22 10:31:16 -04:00
dn_neigh.h
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dn_nsp.h
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dn_route.h decnet: use correct RCU API to deref sk_dst_cache field 2013-01-28 00:15:27 -05:00
dsa.h dsa: Include linux/if_ether.h to fix build error 2011-12-01 11:41:06 -05:00
dsfield.h ipv6: Optimize ipv6_change_dsfield(). 2013-01-09 23:59:53 -08:00
dst.h Fix dst_neigh_lookup/dst_neigh_lookup_skb return value handling bug 2013-03-15 09:06:58 -04:00
dst_ops.h net: Fix warnings in dst_ops.h 2012-07-19 10:43:03 -07:00
esp.h
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ethoc.h
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fib_rules.h ipv4: Elide fib_validate_source() completely when possible. 2012-06-29 01:36:36 -07:00
firewire.h firewire net, ipv4 arp: Extend hardware address and remove driver-level packet inspection. 2013-03-26 12:32:13 -04:00
flow.h ipv4: Add FLOWI_FLAG_KNOWN_NH 2012-10-08 17:42:36 -04:00
flow_keys.h flow_keys: include thoff into flow_keys for later usage 2013-03-20 12:14:36 -04:00
garp.h garp: remove last synchronize_rcu() call 2011-05-12 17:46:56 -04:00
gen_stats.h
…
genetlink.h netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
gre.h GRE: Refactor GRE tunneling code. 2013-03-26 12:27:18 -04:00
gro_cells.h gro: Fix kcalloc argument order 2013-01-27 22:46:33 -05:00
icmp.h ipv4: fix error handling in icmp_protocol. 2013-02-22 15:10:18 -05:00
ieee80211_radiotap.h mac80211: support (partial) VHT radiotap information 2012-11-27 11:56:18 +01:00
ieee802154.h 6LoWPAN: add fragmentation support 2011-11-14 00:19:42 -05:00
ieee802154_netdev.h mac802154: declare reduced mlme operations 2012-05-16 15:16:56 -04:00
if_inet6.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
inet6_connection_sock.h ipv6: Add helper inet6_csk_update_pmtu(). 2012-07-16 03:44:56 -07:00
inet6_hashtables.h ipv6: use a stronger hash for tcp 2013-02-21 18:15:58 -05:00
inet_common.h net-tcp: Fast Open client - sendmsg(MSG_FASTOPEN) 2012-07-19 11:02:03 -07:00
inet_connection_sock.h tcp: Tail loss probe (TLP) 2013-03-12 08:30:34 -04:00
inet_ecn.h tunnel: drop packet if ECN present with not-ECT 2012-09-27 18:12:37 -04:00
inet_frag.h inet: generalize ipv4-only RFC3168 5.3 ecn fragmentation handling for future use by ipv6 2013-03-24 17:16:30 -04:00
inet_hashtables.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
inet_sock.h ipv6: use a stronger hash for tcp 2013-02-21 18:15:58 -05:00
inet_timewait_sock.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
inetpeer.h ipv4: Maintain redirect and PMTU info in struct rtable again. 2012-07-10 22:40:14 -07:00
ip.h ipv4: Add a socket release callback for datagram sockets 2013-01-21 14:17:05 -05:00
ip6_checksum.h ipv6: move csum_ipv6_magic() and udp6_csum_init() into static library 2013-01-08 17:56:10 -08:00
ip6_fib.h ipv6: fix race condition regarding dst->expires and dst->from. 2013-02-20 15:11:45 -05:00
ip6_route.h ipv6: Remove unused neigh argument for icmp6_dst_alloc() and its callers. 2013-01-18 14:41:13 -05:00
ip6_tunnel.h GRE: Refactor GRE tunneling code. 2013-03-26 12:27:18 -04:00
ip_fib.h ipv4: fix definition of FIB_TABLE_HASHSZ 2013-03-13 10:47:09 -04:00
ip_tunnels.h GRE: Refactor GRE tunneling code. 2013-03-26 12:27:18 -04:00
ip_vs.h Merge branch 'master' of git://1984.lsi.us.es/nf-next 2013-03-25 12:11:44 -04:00
ipcomp.h
…
ipconfig.h
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ipv6.h ipv6: implement RFC3168 5.3 (ecn protection) for ipv6 fragmentation handling 2013-03-24 17:16:30 -04:00
ipx.h net: Remove __KERNEL__ cpp checks from include/net 2011-04-24 10:54:56 -07:00
iw_handler.h
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lapb.h lapb: Neaten debugging 2012-05-17 18:45:20 -04:00
lib80211.h include: replace linux/module.h with "struct module" wherever possible 2011-10-31 19:32:32 -04:00
llc.h llc: Remove stray reference to sysctl_llc_station_ack_timeout. 2012-09-17 13:13:24 -04:00
llc_c_ac.h
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llc_c_ev.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
llc_c_st.h
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llc_conn.h
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llc_if.h
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llc_pdu.h net: delete all instances of special processing for token ring 2012-05-15 20:14:35 -04:00
llc_s_ac.h
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llc_s_ev.h
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llc_s_st.h
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llc_sap.h
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mac80211.h mac80211: restrict peer's VHT capabilities to own 2013-03-06 16:36:03 +01:00
mac802154.h mac802154: add wpan device-class support 2012-06-26 21:06:11 -07:00
mip6.h
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mld.h
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mrp.h net/802: Implement Multiple Registration Protocol (MRP) 2013-02-10 20:37:22 -05:00
ndisc.h ndisc: Move ndisc_opt_addr_space() to include/net/ndisc.h. 2013-01-21 13:33:14 -05:00
neighbour.h net neighbour, decnet: Ensure to align device private data on preferred alignment. 2013-02-11 00:21:44 -05:00
net_namespace.h proc: Usable inode numbers for the namespace file descriptors. 2012-11-20 04:19:49 -08:00
net_ratelimit.h net: Kill ratelimit.h dependency in linux/net.h 2011-05-27 13:41:33 -04:00
netdma.h
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netevent.h ipv6 netevent: Remove old_neigh from netevent_redirect. 2013-01-14 15:04:59 -05:00
netlabel.h userns: Convert the audit loginuid to be a kuid 2012-09-17 18:08:54 -07:00
netlink.h netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
netprio_cgroup.h netprio_cgroup: use cgroup->id instead of cgroup_netprio_state->prioidx 2012-11-22 07:32:47 -08:00
netrom.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
nexthop.h
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nl802154.h
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p8022.h
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ping.h net: ping: fix build failure 2011-05-17 14:16:58 -04:00
pkt_cls.h pkt_sched: namespace aware act_mirred 2013-01-14 15:09:36 -05:00
pkt_sched.h sch_api: introduce qdisc_watchdog_schedule_ns() 2013-02-12 18:59:45 -05:00
protocol.h net: Remove code duplication between offload structures 2012-11-15 17:39:51 -05:00
psnap.h
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raw.h
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rawv6.h ipv6: bool/const conversions phase2 2012-05-19 01:08:16 -04:00
red.h net_sched: red: Make minor corrections to comments 2012-04-16 23:53:11 -04:00
regulatory.h regulatory: use RCU to protect last_request 2013-01-03 13:01:30 +01:00
request_sock.h tcp: Remove TCPCT 2013-03-17 14:35:13 -04:00
rose.h
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route.h ipv4: avoid a test in ip_rt_put() 2012-11-03 14:59:04 -04:00
rtnetlink.h rtnetlink: Remove passing of attributes into rtnl_doit functions 2013-03-22 10:31:16 -04:00
sch_generic.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
scm.h net: Remove unnecessary NULL check in scm_destroy(). 2012-09-24 15:52:33 -04:00
secure_seq.h tcp: add const qualifiers where possible 2011-10-21 05:22:42 -04:00
slhc_vj.h
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snmp.h net: avoid reloads in SNMP_UPD_PO_STATS 2012-08-06 13:40:47 -07:00
sock.h hlist: drop the node parameter from iterators 2013-02-27 19:10:24 -08:00
stp.h
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tcp.h tcp: refactor F-RTO 2013-03-21 11:47:50 -04:00
tcp_memcontrol.h cgroup: pass struct mem_cgroup instead of struct cgroup to socket memcg 2012-04-10 10:04:07 -07:00
tcp_states.h
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timewait_sock.h [PATCH] tcp: Cache inetpeer in timewait socket, and only when necessary. 2012-06-09 14:56:12 -07:00
transp_v6.h ipv6: rename datagram_send_ctl and datagram_recv_ctl 2013-01-31 13:53:08 -05:00
udp.h net/ipv6/udp: UDP encapsulation: introduce encap_rcv hook into IPv6 2012-04-28 22:21:51 -04:00
udplite.h net: ipv4: Standardize prefixes for message logging 2012-03-12 17:05:21 -07:00
wext.h
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wimax.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
wpan-phy.h mac802154: monitor device support 2012-05-16 15:17:08 -04:00
x25.h net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
x25device.h
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xfrm.h Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next 2013-02-14 13:29:20 -05:00