Eric Dumazet
cd8ae85299
tcp: provide SYN headers for passive connections ...
This patch allows a server application to get the TCP SYN headers for
its passive connections. This is useful if the server is doing
fingerprinting of clients based on SYN packet contents.
Two socket options are added: TCP_SAVE_SYN and TCP_SAVED_SYN.
The first is used on a socket to enable saving the SYN headers
for child connections. This can be set before or after the listen()
call.
The latter is used to retrieve the SYN headers for passive connections,
if the parent listener has enabled TCP_SAVE_SYN.
TCP_SAVED_SYN is read once, it frees the saved SYN headers.
The data returned in TCP_SAVED_SYN are network (IPv4/IPv6) and TCP
headers.
Original patch was written by Tom Herbert, I changed it to not hold
a full skb (and associated dst and conntracking reference).
We have used such patch for about 3 years at Google.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Neal Cardwell <ncardwell@google.com>
Tested-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2015-05-05 16:02:34 -04:00
9p: switch p9_client_read() to passing struct iov_iter *
2015-04-11 22:28:27 -04:00
Bluetooth: Read LE remote features during connection establishment
2015-04-09 08:36:54 +03:00
caif: fix a signedness bug in cfpkt_iterate()
2015-02-20 17:35:14 -05:00
irda: Convert function pointer arrays and uses to const
2014-12-10 15:33:16 -05:00
netfilter: nf_tables: mark stateful expressions
2015-04-13 20:12:31 +02:00
ipv6: Flow label state ranges
2015-05-03 21:58:01 -04:00
nfc: nci: Add comment to explain NCI_HCI_MAX_PIPES
2015-04-06 00:19:05 +02:00
sctp: avoid to repeatedly declare external variables
2015-03-25 11:40:16 -04:00
act_bpf: add initial eBPF support for actions
2015-03-20 19:10:44 -04:00
ieee802154: 6lowpan: rename process_data and lowpan_process_data
2014-10-27 15:51:16 +01:00
net: Export IGMP/MLD message validation code
2015-05-04 14:49:23 -04:00
ieee802154: mac802154: remove FSF address
2014-10-25 08:07:30 +02:00
net: Remove iocb argument from sendmsg and recvmsg
2015-03-02 13:06:31 -05:00
ipsec: Remove obsolete MAX_AH_AUTH_LEN
2014-09-18 10:54:36 +02:00
neigh: Factor out ___neigh_lookup_noref
2015-03-04 00:23:23 -05:00
ax25: Stop using magic neighbour cache operations.
2015-03-03 14:44:41 -05:00
bonding: Implement port churn-machine (AD standard 43.4.17).
2015-02-24 16:05:48 -05:00
net: Move bonding headers under include/net
2014-11-10 13:27:49 -05:00
net: Move bonding headers under include/net
2014-11-10 13:27:49 -05:00
net/bonding: Make DRV macros private
2015-04-26 22:59:53 -04:00
cfg80211: move IE split utilities here from mac80211
2015-04-07 13:56:41 +02:00
nl802154: introduce support for cca settings
2014-12-19 00:19:23 +01:00
net: Fix remcsum in GRO path to not change packet
2015-02-11 15:12:09 -08:00
cipso: don't use IPCB() to locate the CIPSO IP option
2015-02-11 14:46:37 -05:00
net: use ktime_get_ns() and ktime_get_real_ns() helpers
2014-08-22 19:57:23 -07:00
net: switch importing msghdr from userland to {compat_,}import_iovec()
2015-04-09 00:02:26 -04:00
net/dcb: Add IEEE QCN attribute
2015-03-06 21:50:02 -05:00
netfilter: Pass socket pointer down through okfn().
2015-04-07 15:25:55 -04:00
net: dsa: Add basic framework to support ndo_fdb functions
2015-03-29 13:23:54 -07:00
ipv6: Remove DST_METRICS_FORCE_OVERWRITE and _rt6i_peer
2015-05-01 20:57:06 -04:00
net: Remove protocol from struct dst_ops
2015-03-09 16:06:10 -04:00
net: Kill hold_net release_net
2015-03-12 14:39:40 -04:00
ipv4, fib: pass LOOPBACK_IFINDEX instead of 0 to flowi4_iif
2014-04-16 15:05:11 -04:00
net: Add flow_keys digest
2015-05-04 00:09:09 -04:00
ip_tunnel: Ops registration for secondary encap (fou, gue)
2014-11-12 15:01:35 -05:00
net: sched: enable per cpu qstats
2014-09-30 01:02:26 -04:00
net: Introduce possible_net_t
2015-03-12 14:39:40 -04:00
openvswitch: Add support for checksums on UDP tunnels.
2015-01-28 23:04:15 -08:00
gre: Call gso_make_checksum
2014-06-04 22:46:38 -07:00
ip_tunnel: Create percpu gro_cell
2015-01-18 01:56:32 -05:00
gue: Protocol constants for remote checksum offload
2014-11-05 16:30:03 -05:00
ieee802154: rework cca setting
2014-12-19 00:19:23 +01:00
ipv6: do retries on stable privacy addresses
2015-03-23 22:12:09 -04:00
inet: get rid of central tcp/dccp listener timer
2015-03-20 12:40:25 -04:00
ipv6: get rid of __inet6_hash()
2015-03-18 22:00:35 -04:00
net: Remove iocb argument from sendmsg and recvmsg
2015-03-02 13:06:31 -05:00
inet: fix possible panic in reqsk_queue_unlink()
2015-04-24 11:39:15 -04:00
tunnel: fix RFC number in comment for INET_ECN_decapsulate()
2014-05-07 15:30:52 -04:00
percpu_counter: add @gfp to percpu_counter_init()
2014-09-08 09:51:29 +09:00
inet: get rid of last __inet_hash_connect() argument
2015-03-18 22:00:35 -04:00
inet: fix request sock refcounting
2015-03-17 22:02:29 -04:00
tcp/dccp: get rid of central timewait timer
2015-04-13 16:40:05 -04:00
tcp: simplify inetpeer_addr_base use
2015-03-31 13:58:35 -04:00
netfilter: Pass socket pointer down through okfn().
2015-04-07 15:25:55 -04:00
net: add gro_compute_pseudo functions
2014-08-24 18:09:23 -07:00
ipv6: Remove DST_METRICS_FORCE_OVERWRITE and _rt6i_peer
2015-05-01 20:57:06 -04:00
netfilter: Pass socket pointer down through okfn().
2015-04-07 15:25:55 -04:00
udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb().
2015-04-07 15:29:08 -04:00
ipv4: FIB Local/MAIN table collapse
2015-03-11 16:22:14 -04:00
ipip,gre,vti,sit: implement ndo_get_iflink
2015-04-02 14:05:00 -04:00
net: Introduce possible_net_t
2015-03-12 14:39:40 -04:00
ipv6: Flow label state ranges
2015-05-03 21:58:01 -04:00
switch ipxrtr_route_packet() from iovec to msghdr
2014-11-24 04:28:49 -05:00
wext: add checked wrappers for adding events/points to streams
2015-02-28 21:31:12 +01:00
lib80211: remove unused print_ssid()
2014-10-14 02:18:27 +02:00
llc: Make llc_conn_ev_qfyr_t function pointer arrays const
2014-12-10 15:21:24 -05:00
llc: Make llc_sap_action_t function pointer arrays const
2014-12-10 15:21:24 -05:00
cfg80211: move IE split utilities here from mac80211
2015-04-07 13:56:41 +02:00
mac802154: fix transmission power datatype
2015-04-09 19:56:15 +02:00
ipv6: mld: answer mldv2 queries with mldv1 reports in mldv1 fallback
2014-09-22 16:23:15 -04:00
openvswitch: Add basic MPLS support to kernel
2014-11-05 23:52:33 -08:00
neigh: Factor out ___neigh_lookup_noref
2015-03-04 00:23:23 -05:00
net: neighbour: Add mcast_resolicit to configure the number of multicast resolicitations in PROBE state.
2015-03-20 21:47:40 -04:00
net: Introduce possible_net_t
2015-03-12 14:39:40 -04:00
netlabel: fix the netlbl_catmap_setlong() dummy function
2014-08-07 20:55:21 -04:00
netlink: implement nla_get_in_addr and nla_get_in6_addr
2015-03-31 13:58:35 -04:00
nl802154: introduce support for cca settings
2014-12-19 00:19:23 +01:00
net: Remove iocb argument from sendmsg and recvmsg
2015-03-02 13:06:31 -05:00
net: sched: remove tcf_proto from ematch calls
2014-10-06 18:02:32 -04:00
net: rename vlan_tx_* helpers since "tx" is misleading there
2015-01-13 17:51:08 -05:00
net: Eliminate no_check from protosw
2014-05-23 16:28:53 -04:00
cfg80211: allow wiphy specific regdomain management
2014-12-17 11:49:55 +01:00
tcp: provide SYN headers for passive connections
2015-05-05 16:02:34 -04:00
ipv4: per cpu uncached list
2015-01-15 18:26:16 -05:00
rtnetlink: Mark name argument of rtnl_create_link() const
2015-04-10 12:42:40 -07:00
net: sched: remove TC_MUNGED bits
2015-05-02 22:25:17 -04:00
inetpeer: get rid of ip_id_count
2014-06-02 11:00:41 -07:00
Merge branch 'for-3.18-consistent-ops' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
2014-10-15 07:48:18 +02:00
Merge branch 'iocb' into for-davem
2015-04-09 00:01:38 -04:00
switchdev: kernel-doc cleanup on swithdev ops
2015-03-20 21:36:53 -04:00
tcp: prepare CC get_info() access from getsockopt()
2015-04-29 17:10:38 -04:00
inet: add TCP_NEW_SYN_RECV state
2015-03-12 22:58:12 -04:00
net: Add a software TSO helper API
2014-05-22 14:57:15 -04:00
net: Remove iocb argument from sendmsg and recvmsg
2015-03-02 13:06:31 -05:00
udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb().
2015-04-07 15:29:08 -04:00
net: switch memcpy_fromiovec()/memcpy_fromiovecend() users to copy_from_iter()
2015-02-04 01:34:15 -05:00
udp_tunnel: Pass UDP socket down through udp_tunnel{, 6}_xmit_skb().
2015-04-07 15:29:08 -04:00
net: treewide: Fix typo found in DocBook/networking.xml
2014-09-05 17:35:28 -07:00
netfilter: Pass socket pointer down through okfn().
2015-04-07 15:25:55 -04:00
cd8ae85299