tmp_suning_uos_patched/net
Gerrit Renker b4d4f7c70f [DCCP]: Handle timestamps on Request/Response exchange separately
In DCCP, timestamps can occur on packets anytime, CCID3 uses a timestamp(/echo) on the Request/Response
exchange. This patch addresses the following situation:
	* timestamps are recorded on the listening socket;
	* Responses are sent from dccp_request_sockets;
	* suppose two connections reach the listening socket with very small time in between:
	* the first timestamp value gets overwritten by the second connection request.

This is not really good, so this patch separates timestamps into
 * those which are received by the server during the initial handshake (on dccp_request_sock);
 * those which are received by the client or the client after connection establishment.

As before, a timestamp of 0 is regarded as indicating that no (meaningful) timestamp has been
received (in addition, a warning message is printed if hosts send 0-valued timestamps).

The timestamp-echoing now works as follows:
 * when a timestamp is present on the initial Request, it is placed into dreq, due to the
   call to dccp_parse_options in dccp_v{4,6}_conn_request;
 * when a timestamp is present on the Ack leading from RESPOND => OPEN, it is copied over
   from the request_sock into the child cocket in dccp_create_openreq_child;
 * timestamps received on an (established) dccp_sock are treated as before.

Since Elapsed Time is measured in hundredths of milliseconds (13.2), the new dccp_timestamp()
function is used, as it is expected that the time between receiving the timestamp and
sending the timestamp echo will be very small against the wrap-around time. As a byproduct,
this allows smaller timestamping-time fields.

Furthermore, inserting the Timestamp Echo option has been taken out of the block starting with
'!dccp_packet_without_ack()', since Timestamp Echo can be carried on any packet (5.8 and 13.3).

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2008-01-28 14:57:51 -08:00
..
9p 9p: add missing end-of-options record for trans_fd 2007-11-06 08:02:53 -06:00
802 [TR]: Use ctl paths to register net/token-ring/ table 2008-01-28 14:56:28 -08:00
8021q [VLAN]: nested VLAN: fix lockdep's recursive locking warning 2008-01-10 22:38:31 -08:00
appletalk [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
atm [NET]: Name magic constants in sock_wake_async() 2008-01-28 14:55:03 -08:00
ax25 [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
bluetooth [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
bridge [NETFILTER]: Mark hooks __read_mostly 2008-01-28 14:56:07 -08:00
can [CAN]: Add virtual CAN netdevice driver 2008-01-28 14:54:12 -08:00
core [NET]: Check RTNL status in unregister_netdevice 2008-01-28 14:57:43 -08:00
dccp [DCCP]: Handle timestamps on Request/Response exchange separately 2008-01-28 14:57:51 -08:00
decnet [DECNET]: Fix inverted wait flag in xfrm_lookup call 2008-01-28 14:57:44 -08:00
econet [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
ethernet [NET]: Validate device addr prior to interface-up 2007-10-23 21:27:50 -07:00
ieee80211 softmac: mark as obsolete and schedule for removal 2008-01-28 14:55:36 -08:00
ipv4 [IPSEC]: Do not let packets pass when ICMP flag is off 2008-01-28 14:57:43 -08:00
ipv6 [IPV6]: fix section mismatch warnings 2008-01-28 14:57:46 -08:00
ipx [IPX]: Use existing sock refcnt debugging infrastructure 2007-11-10 21:39:26 -08:00
irda [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
iucv [IUCV]: use LIST_HEAD instead of LIST_HEAD_INIT 2008-01-28 14:56:54 -08:00
key [AF_KEY]: Fix skb leak on pfkey_send_migrate() error 2008-01-20 20:31:45 -08:00
lapb [LAPB] net/lapb/lapb_iface.c: use LIST_HEAD instead of LIST_HEAD_INIT 2008-01-28 14:56:52 -08:00
llc [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
mac80211 mac80211: remove "bcn_int" and "capab" scan results info 2008-01-28 14:55:34 -08:00
netfilter [NETFILTER]: Select CONFIG_NETFILTER_NETLINK when needed 2008-01-28 14:56:25 -08:00
netlabel [NETLABEL]: Spelling fixes 2007-12-20 14:03:11 -08:00
netlink [NETLINK]: kzalloc() conversion 2008-01-28 14:57:06 -08:00
netrom [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
packet [NETNS]: separate af_packet netns data 2008-01-28 14:57:15 -08:00
rfkill rfkill: call rfkill_led_trigger_unregister() on error 2008-01-20 20:31:36 -08:00
rose [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
rxrpc [UDP]: Restore missing inDatagrams increments 2008-01-28 14:56:33 -08:00
sched [NETFILTER]: Mark hooks __read_mostly 2008-01-28 14:56:07 -08:00
sctp [NET]: Name magic constants in sock_wake_async() 2008-01-28 14:55:03 -08:00
sunrpc [UDP]: Restore missing inDatagrams increments 2008-01-28 14:56:33 -08:00
tipc [NET]: Convert init_timer into setup_timer 2008-01-28 14:53:35 -08:00
unix [NETNS]: struct net content re-work (v3) 2008-01-28 14:57:14 -08:00
wanrouter [NET]: Make /proc/net per network namespace 2007-10-10 16:49:06 -07:00
wireless [NET]: Consolidate net namespace related proc files creation. 2008-01-28 14:54:28 -08:00
x25 [X25]: use LIST_HEAD instead of LIST_HEAD_INIT 2008-01-28 14:56:53 -08:00
xfrm [IPSEC]: Add ICMP host relookup support 2008-01-28 14:57:23 -08:00
compat.c [NETFILTER]: Introduce NF_INET_ hook values 2008-01-28 14:53:55 -08:00
Kconfig [CAN]: Add PF_CAN core module 2008-01-28 14:54:10 -08:00
Makefile [CAN]: Add PF_CAN core module 2008-01-28 14:54:10 -08:00
nonet.c
socket.c [NET] sysctl: make sysctl_somaxconn per-namespace 2008-01-28 14:56:57 -08:00
sysctl_net.c [NET]: Remove the empty net_table 2008-01-28 14:56:29 -08:00
TUNABLE