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freebsd-nq/sys/netinet
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Gleb Smirnoff 0c39d38d21 Historically we have two fields in tcpcb to describe sender MSS: t_maxopd, 
and t_maxseg. This dualism emerged with T/TCP, but was not properly cleaned
up after T/TCP removal. After all permutations over the years the result is
that t_maxopd stores a minimum of peer offered MSS and MTU reduced by minimum
protocol header. And t_maxseg stores (t_maxopd - TCPOLEN_TSTAMP_APPA) if
timestamps are in action, or is equal to t_maxopd otherwise. That's a very
rough estimate of MSS reduced by options length. Throughout the code it
was used in places, where preciseness was not important, like cwnd or
ssthresh calculations.

With this change:

- t_maxopd goes away.
- t_maxseg now stores MSS not adjusted by options.
- new function tcp_maxseg() is provided, that calculates MSS reduced by
  options length. The functions gives a better estimate, since it takes
  into account SACK state as well.

Reviewed by:	jtl
Differential Revision:	https://reviews.freebsd.org/D3593
2016-01-07 00:14:42 +00:00
..
cc
Add an option to use rfc6675 based pipe/inflight bytes calculation in newreno.
2015-12-09 08:53:41 +00:00
khelp
…
libalias
mdoc: fix rendering issues
2015-04-26 11:39:25 +00:00
tcp_stacks
Remove redundant extern's that make the ppc compile fail.
2015-12-16 15:16:44 +00:00
accf_data.c
Rework socket upcalls to close some races with setup/teardown of upcalls.
2009-06-01 21:17:03 +00:00
accf_dns.c
In preparation of merging projects/sendfile, transform bare access to
2014-11-12 09:57:15 +00:00
accf_http.c
In preparation of merging projects/sendfile, transform bare access to
2014-11-12 09:57:15 +00:00
cc.h
DCTCP (Data Center TCP) implementation.
2015-01-12 08:33:04 +00:00
icmp6.h
Implement Enhanced DAD algorithm for IPv6 described in
2015-03-02 17:30:26 +00:00
icmp_var.h
…
if_atm.c
…
if_atm.h
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if_ether.c
Remove second EVENTHANDLER_REGISTER slipped in r292978.
2016-01-01 10:15:06 +00:00
if_ether.h
Implement interface link header precomputation API.
2015-12-31 05:03:27 +00:00
igmp_var.h
- Rename 'struct igmp_ifinfo' into 'struct igmp_ifsoftc', since it really
2015-02-19 22:35:23 +00:00
igmp.c
In the same way fix the problem described in r291578 for IGMPv3.
2015-12-01 11:24:30 +00:00
igmp.h
…
in_cksum.c
…
in_debug.c
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in_fib.c
Maintain consistent behavior: make fib4_lookup_nh_ext() return
2016-01-04 17:23:10 +00:00
in_fib.h
Merge helper fib* functions used for basic lookups.
2015-12-08 10:50:03 +00:00
in_gif.c
Merge helper fib* functions used for basic lookups.
2015-12-08 10:50:03 +00:00
in_kdtrace.c
Fix style issues around existing SDT probes.
2015-12-16 23:39:27 +00:00
in_kdtrace.h
Fix style issues around existing SDT probes.
2015-12-16 23:39:27 +00:00
in_mcast.c
Make in_arpinput(), inp_lookup_mcast_ifp(), icmp_reflect(),
2015-12-09 11:14:27 +00:00
in_pcb.c
The r241129 description was wrong that the scenario is possible
2015-11-25 14:45:43 +00:00
in_pcb.h
Use Jenkins hash for TCP syncache.
2015-09-05 10:15:19 +00:00
in_pcbgroup.c
Refactor / restructure the RSS code into generic, IPv4 and IPv6 specific
2015-01-18 18:06:40 +00:00
in_proto.c
Finish r274118: remove useless fields from struct domain.
2014-11-06 14:39:04 +00:00
in_rmx.c
Since r256624 we've been leaking routing table allocations
2015-12-22 14:53:19 +00:00
in_rss.c
Rename rss_soft_m2cpuid() -> rss_soft_m2cpuid_v4() in preparation for
2015-08-29 06:58:30 +00:00
in_rss.h
Rename rss_soft_m2cpuid() -> rss_soft_m2cpuid_v4() in preparation for
2015-08-29 06:58:30 +00:00
in_systm.h
Where appropriate, use the modern terms for the one true time base
2014-12-21 05:07:11 +00:00
in_var.h
Revert r292275 & r292379
2015-12-17 14:41:30 +00:00
in.c
Add rib_lookup_info() to provide API for retrieving individual route
2016-01-04 15:03:20 +00:00
in.h
Provide functions to determine presence of a given address
2015-04-17 11:57:06 +00:00
ip6.h
…
ip_carp.c
Revert r292275 & r292379
2015-12-17 14:41:30 +00:00
ip_carp.h
…
ip_divert.c
Convert netinet6/ to use new routing API.
2014-11-04 15:39:56 +00:00
ip_divert.h
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ip_dummynet.h
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ip_ecn.c
…
ip_ecn.h
Remove unneded #include "opt_inet.h".
2015-07-31 09:02:28 +00:00
ip_encap.c
Fix possible use after free in encap[46]_input().
2015-06-18 18:28:38 +00:00
ip_encap.h
…
ip_fastfwd.c
Replace the fastforward path with tryforward which does not require a
2015-11-05 07:26:32 +00:00
ip_fw.h
Implement ipfw internal olist command to list named objects.
2015-11-03 10:21:53 +00:00
ip_gre.c
o Use new function ip_fillid() in all places throughout the kernel,
2015-04-01 22:26:39 +00:00
ip_icmp.c
Make in_arpinput(), inp_lookup_mcast_ifp(), icmp_reflect(),
2015-12-09 11:14:27 +00:00
ip_icmp.h
Where appropriate, use the modern terms for the one true time base
2014-12-21 05:07:11 +00:00
ip_id.c
Provide a comment explaining issues with the counter(9) trick, so that
2015-04-02 14:22:59 +00:00
ip_input.c
Make in_arpinput(), inp_lookup_mcast_ifp(), icmp_reflect(),
2015-12-09 11:14:27 +00:00
ip_ipsec.c
Set the proper direction to check for policies in this one case.
2015-10-29 21:26:32 +00:00
ip_ipsec.h
Remove flag/flags argument from the following functions:
2014-12-11 18:35:34 +00:00
ip_mroute.c
CALLOUT_MPSAFE has lost its meaning since r141428, i.e., for more than ten
2015-05-22 17:05:21 +00:00
ip_mroute.h
…
ip_options.c
Make in_arpinput(), inp_lookup_mcast_ifp(), icmp_reflect(),
2015-12-09 11:14:27 +00:00
ip_options.h
…
ip_output.c
Implement interface link header precomputation API.
2015-12-31 05:03:27 +00:00
ip_reass.c
Fix RSS build - netisr input / NETISR_IP_DIRECT is used here.
2015-04-15 00:57:21 +00:00
ip_var.h
Make in_arpinput(), inp_lookup_mcast_ifp(), icmp_reflect(),
2015-12-09 11:14:27 +00:00
ip.h
Since the IETF has redefined the meaning of the tos field to accommodate
2015-07-18 06:48:30 +00:00
pim_var.h
…
pim.h
…
raw_ip.c
Convert in_ifaddr_lock and in6_ifaddr_lock to rmlock.
2015-07-29 08:12:05 +00:00
sctp_asconf.c
Provide consistent error causes whenever an ABORT chunk is sent.
2015-07-27 22:35:54 +00:00
sctp_asconf.h
…
sctp_auth.c
Use __func__ instead of __FUNCTION__.
2015-10-19 11:17:54 +00:00
sctp_auth.h
…
sctp_bsd_addr.c
Minimize the usage of SCTP_BUF_IS_EXTENDED.
2015-01-10 20:49:57 +00:00
sctp_bsd_addr.h
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sctp_cc_functions.c
Fix style issues around existing SDT probes.
2015-12-16 23:39:27 +00:00
sctp_constants.h
Ensure that ERROR chunks are always padded by implementing this
2015-09-11 13:54:33 +00:00
sctp_crc32.c
…
sctp_crc32.h
…
sctp_dtrace_declare.h
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sctp_dtrace_define.h
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sctp_header.h
Cleanup the handling of error causes for ERROR chunks. This fixes
2015-09-12 17:08:51 +00:00
sctp_indata.c
Stop processing of a SACK when the association has been aborted.
2015-12-21 18:52:02 +00:00
sctp_indata.h
Don't take the port numbers for packets containing ABORT chunks from
2015-08-02 16:07:30 +00:00
sctp_input.c
Retire sctp_validate_no_locks().
2015-12-10 11:49:32 +00:00
sctp_input.h
Add FIB support for SCTP.
2015-06-17 15:20:14 +00:00
sctp_lock_bsd.h
…
sctp_os_bsd.h
Replace sys/crypto/sha2/sha2.c with lib/libmd/sha512c.c
2015-12-27 17:33:59 +00:00
sctp_os.h
…
sctp_output.c
Don't implicitly terminate a user message when moving it to the
2015-12-25 18:11:40 +00:00
sctp_output.h
Fix an issue with MAC OS locking and also optimize the case
2015-07-24 14:09:03 +00:00
sctp_pcb.c
Fix the allocation of outgoing streams:
2015-12-06 16:17:57 +00:00
sctp_pcb.h
Retire sctp_validate_no_locks().
2015-12-10 11:49:32 +00:00
sctp_peeloff.c
Add a SCTP socket option to limit the cwnd for each path.
2015-03-10 19:49:25 +00:00
sctp_peeloff.h
…
sctp_ss_functions.c
…
sctp_structs.h
Get struct sctp_net_route in sync with struct route again.
2016-01-04 20:34:40 +00:00
sctp_syscalls.c
Fix two KTRACE related bugs.
2015-06-19 21:55:12 +00:00
sctp_sysctl.c
Fix the exporting of SCTP association states to userland. Without this,
2015-08-29 09:14:32 +00:00
sctp_sysctl.h
Remove redundant 'man page'
2015-09-15 21:16:45 +00:00
sctp_timer.c
Ensure that outgoing streams get reset when they run dry.
2015-12-03 15:19:29 +00:00
sctp_timer.h
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sctp_uio.h
The field sinfo_timetolive should have been sinfo_pr_value.
2015-11-06 14:00:26 +00:00
sctp_usrreq.c
Fix the allocation of outgoing streams:
2015-12-06 16:17:57 +00:00
sctp_var.h
Stop the heartbeat timer when removing a net.
2015-06-14 17:48:44 +00:00
sctp.h
Cleanup the handling of error causes for ERROR chunks. This fixes
2015-09-12 17:08:51 +00:00
sctputil.c
Fix the allocation of outgoing streams:
2015-12-06 16:17:57 +00:00
sctputil.h
Fix the allocation of outgoing streams:
2015-12-06 16:17:57 +00:00
siftr.c
Move the SIFTR DTrace probe out of the writing thread context
2015-04-30 17:43:40 +00:00
tcp_debug.c
…
tcp_debug.h
…
tcp_fastopen.c
Implementation of server-side TCP Fast Open (TFO) [RFC7413].
2015-12-24 19:09:48 +00:00
tcp_fastopen.h
Implementation of server-side TCP Fast Open (TFO) [RFC7413].
2015-12-24 19:09:48 +00:00
tcp_fsm.h
…
tcp_hostcache.c
Clean up unused bandwidth entry in the TCP hostcache.
2015-12-11 06:22:58 +00:00
tcp_hostcache.h
Clean up unused bandwidth entry in the TCP hostcache.
2015-12-11 06:22:58 +00:00
tcp_input.c
Historically we have two fields in tcpcb to describe sender MSS: t_maxopd,
2016-01-07 00:14:42 +00:00
tcp_lro.c
Fix leak in tcp_lro_rx. Simply clearing M_PKTHDR isn't enough, any tags
2015-06-30 17:19:58 +00:00
tcp_lro.h
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tcp_offload.c
Convert netinet6/ to use new routing API.
2014-11-04 15:39:56 +00:00
tcp_offload.h
…
tcp_output.c
Historically we have two fields in tcpcb to describe sender MSS: t_maxopd,
2016-01-07 00:14:42 +00:00
tcp_pcap.c
Hopefully also unbreak VIMAGE kernels replacing the &V_... with
2015-10-15 01:44:32 +00:00
tcp_pcap.h
There are times when it would be really nice to have a record of the last few
2015-10-14 00:35:37 +00:00
tcp_reass.c
Eliminate nd6_nud_hint() and its TCP bindings.
2015-09-27 05:29:34 +00:00
tcp_sack.c
First cut of the modularization of our TCP stack. Still
2015-12-16 00:56:45 +00:00
tcp_seq.h
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tcp_subr.c
Historically we have two fields in tcpcb to describe sender MSS: t_maxopd,
2016-01-07 00:14:42 +00:00
tcp_syncache.c
Implementation of server-side TCP Fast Open (TFO) [RFC7413].
2015-12-24 19:09:48 +00:00
tcp_syncache.h
Implementation of server-side TCP Fast Open (TFO) [RFC7413].
2015-12-24 19:09:48 +00:00
tcp_timer.c
Historically we have two fields in tcpcb to describe sender MSS: t_maxopd,
2016-01-07 00:14:42 +00:00
tcp_timer.h
Put r284245 back in place: If at first this fix was seen as a temporary
2015-08-30 13:44:39 +00:00
tcp_timewait.c
Decompose TCP INP_INFO lock to increase short-lived TCP connections scalability:
2015-08-03 12:13:54 +00:00
tcp_usrreq.c
Historically we have two fields in tcpcb to describe sender MSS: t_maxopd,
2016-01-07 00:14:42 +00:00
tcp_var.h
Historically we have two fields in tcpcb to describe sender MSS: t_maxopd,
2016-01-07 00:14:42 +00:00
tcp.h
Implementation of server-side TCP Fast Open (TFO) [RFC7413].
2015-12-24 19:09:48 +00:00
tcpip.h
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toecore.c
Implement interface link header precomputation API.
2015-12-31 05:03:27 +00:00
toecore.h
* Convert TOE framework to use new routing api.
2014-10-25 18:25:00 +00:00
udp_usrreq.c
Fixed comment placement.
2015-12-24 13:57:43 +00:00
udp_var.h
get_inpcbinfo() and get_pcblist() are UDP local functions and
2015-08-27 15:27:41 +00:00
udp.h
…
udplite.h
…