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freebsd-skq/sys/netinet
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andre 9d9488f599 Change the default MSS for IPv4 and IPv6 TCP connections from an 
artificial power-of-2 rounded number to their real values specified
in RFC879 and RFC2460.

From the history and existing comments it appears that the rounded
numbers were intended to be advantageous for the kernel and mbuf
system.  However this hasn't been the case at for at least a long
time.  The mbuf clusters used in tcp_output() have enough space
to hold the larger real value for the default MSS for both IPv4 and
IPv6.  Note that the default MSS is only used when path MTU discovery
is disabled.

Update and expand related comments.

Reviewed by:	lsteward (including some word-smithing)
MFC after:	2 weeks
2010-09-15 10:39:30 +00:00
..
ipfw in_delayed_cksum() requires host byte order. 2010-09-06 13:17:01 +00:00
libalias Don't use struct timezone. 2010-08-08 02:51:32 +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 Rework socket upcalls to close some races with setup/teardown of upcalls. 2009-06-01 21:17:03 +00:00
accf_http.c Rework socket upcalls to close some races with setup/teardown of upcalls. 2009-06-01 21:17:03 +00:00
icmp6.h MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
icmp_var.h Many network stack subsystems use a single global data structure to hold 2009-08-02 19:43:32 +00:00
if_atm.c
if_atm.h
if_ether.c Unbreak LINT by moving all carp hooks to net/if.c / netinet/ip_carp.h, with 2010-08-11 20:18:19 +00:00
if_ether.h Add arp_update_event. This replaces route_arp_update_event, which 2009-09-08 21:17:17 +00:00
igmp_var.h Update stats in struct igmpstat using two new macros: 2009-04-12 13:41:13 +00:00
igmp.c Fix a regression where DVMRP diagnostic traffic, such as that used 2010-04-27 14:14:21 +00:00
igmp.h These are no longer referenced in the tree, so can be safely removed. 2009-06-10 18:12:15 +00:00
in_cksum.c
in_gif.c MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
in_gif.h
in_mcast.c Fix a few issues related to the legacy 4.4 BSD multicast APIs. 2010-04-10 12:05:31 +00:00
in_pcb.c This patch fixes the problem where proxy ARP entries cannot be added 2010-05-25 20:42:35 +00:00
in_pcb.h Abstract out initialization of most aspects of struct inpcbinfo from 2010-03-14 18:59:11 +00:00
in_proto.c Allow carp(4) to be loaded as a kernel module. Follow precedent set by 2010-08-11 00:51:50 +00:00
in_rmx.c MFp4 @181628: 2010-07-31 15:31:23 +00:00
in_systm.h
in_var.h Remove unused VNET_SET() and related macros; only VNET_GET() is 2009-07-16 21:13:04 +00:00
in.c In case of RADIX_MPATH do not leak the IN_IFADDR read lock on 2010-09-04 16:06:01 +00:00
in.h MFp4: anchie_soc2009 branch: 2010-08-19 11:31:03 +00:00
ip6.h
ip_carp.c Fix CARP in backup mode by properly registering its hooks for INET and INET6 2010-09-06 21:06:06 +00:00
ip_carp.h Unbreak LINT by moving all carp hooks to net/if.c / netinet/ip_carp.h, with 2010-08-11 20:18:19 +00:00
ip_divert.c Ensure a minimum "slop" of 10 extra pcb structures when providing a 2010-08-17 16:41:16 +00:00
ip_divert.h Various cleanup done in ipfw3-head branch including: 2010-01-04 19:01:22 +00:00
ip_dummynet.h whitespace fixes (trailing whitespace, bad indentation 2010-04-19 16:17:30 +00:00
ip_ecn.c
ip_ecn.h
ip_encap.c (S)LIST_HEAD_INITIALIZER takes a (S)LIST_HEAD as an argument. 2009-12-28 22:56:30 +00:00
ip_encap.h
ip_fastfwd.c Virtualize the pfil hooks so that different jails may chose different 2009-10-11 05:59:43 +00:00
ip_fw.h + implement (two lines) the kernel side of 'lookup dscp N' to use the 2010-03-15 17:14:27 +00:00
ip_gre.c The NetBSD Foundation has granted permission to remove clause 3 and 4 from 2010-03-01 17:05:46 +00:00
ip_gre.h The NetBSD Foundation has granted permission to remove clause 3 and 4 from 2010-03-01 17:05:46 +00:00
ip_icmp.c Change the messages of the ICMP bad port bandwidth limiter from 2010-08-14 21:04:27 +00:00
ip_icmp.h MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
ip_id.c
ip_input.c MFp4 CH=183052 183053 183258: 2010-09-02 17:43:44 +00:00
ip_ipsec.c The proper fix for the delayed SCTP checksum is to 2010-03-12 22:58:52 +00:00
ip_ipsec.h Remove ifdefed out part of code, which seems to have originated a decade ago 2009-11-09 19:53:34 +00:00
ip_mroute.c Virtualize the IPv4 multicast routing code. 2010-06-02 15:44:43 +00:00
ip_mroute.h Virtualize the IPv4 multicast routing code. 2010-06-02 15:44:43 +00:00
ip_options.c This patch fixes the problem where proxy ARP entries cannot be added 2010-05-25 20:42:35 +00:00
ip_options.h
ip_output.c This patch fixes the problem where proxy ARP entries cannot be added 2010-05-25 20:42:35 +00:00
ip_var.h MFp4 CH=183052 183053 183258: 2010-09-02 17:43:44 +00:00
ip.h use u_char instead of u_int for short bitfields. 2010-02-01 14:13:44 +00:00
pim_var.h Virtualize the IPv4 multicast routing code. 2010-06-02 15:44:43 +00:00
pim.h
raw_ip.c Adding an address on an interface also requires the loopback route to 2010-09-12 18:04:47 +00:00
sctp_asconf.c * Fix a bug where the length of the ASCONF-ACK was calculated wrong due 2010-06-14 21:25:07 +00:00
sctp_asconf.h
sctp_auth.c Spacing issues 2010-06-05 21:33:16 +00:00
sctp_auth.h Use [] instead of [0] for flexible arrays. 2010-01-22 07:53:41 +00:00
sctp_bsd_addr.c Spacing issues 2010-06-05 21:33:16 +00:00
sctp_bsd_addr.h This adds back the Iterator to the sctp 2010-05-16 17:03:56 +00:00
sctp_cc_functions.c Fix the switching on/off of CMT using sysctl and socket option. 2010-08-28 17:59:51 +00:00
sctp_cc_functions.h
sctp_constants.h 1) Optimize the cleanup and don't always depend on 2010-06-06 20:34:17 +00:00
sctp_crc32.c Fix the the SCTP_WITH_NO_CSUM option when used in combination with 2010-08-29 18:50:30 +00:00
sctp_crc32.h Fix the the SCTP_WITH_NO_CSUM option when used in combination with 2010-08-29 18:50:30 +00:00
sctp_header.h Add missing SCTP_PACKED. Spotted by Irene Ruengeler. 2010-02-13 21:38:15 +00:00
sctp_indata.c Fix the switching on/off of CMT using sysctl and socket option. 2010-08-28 17:59:51 +00:00
sctp_indata.h * Fix some race condition in SACK/NR-SACK processing. 2010-04-03 15:40:14 +00:00
sctp_input.c Fix some CLANG warnings. One clang warning is left 2010-09-05 13:41:45 +00:00
sctp_input.h
sctp_lock_bsd.h 1) Optimize the cleanup and don't always depend on 2010-06-06 20:34:17 +00:00
sctp_os_bsd.h Fix the the SCTP_WITH_NO_CSUM option when used in combination with 2010-08-29 18:50:30 +00:00
sctp_os.h
sctp_output.c * Remove code which has no effect. 2010-09-09 20:51:23 +00:00
sctp_output.h * Fix some race condition in SACK/NR-SACK processing. 2010-04-03 15:40:14 +00:00
sctp_pcb.c Fix some CLANG warnings. One clang warning is left 2010-09-05 13:41:45 +00:00
sctp_pcb.h Fix the switching on/off of CMT using sysctl and socket option. 2010-08-28 17:59:51 +00:00
sctp_peeloff.c Fix the switching on/off of CMT using sysctl and socket option. 2010-08-28 17:59:51 +00:00
sctp_peeloff.h
sctp_structs.h PR SCTP Bugs. Basically a full sized frame of 2010-07-29 11:37:04 +00:00
sctp_sysctl.c Fix the the SCTP_WITH_NO_CSUM option when used in combination with 2010-08-29 18:50:30 +00:00
sctp_sysctl.h Fix the the SCTP_WITH_NO_CSUM option when used in combination with 2010-08-29 18:50:30 +00:00
sctp_timer.c Fix some CLANG warnings. One clang warning is left 2010-09-05 13:41:45 +00:00
sctp_timer.h
sctp_uio.h Implement correct handling of address parameter and 2010-09-05 20:13:07 +00:00
sctp_usrreq.c Fix the switching on/off of CMT using sysctl and socket option. 2010-08-28 17:59:51 +00:00
sctp_var.h * Fix some race condition in SACK/NR-SACK processing. 2010-04-03 15:40:14 +00:00
sctp.h Fix the switching on/off of CMT using sysctl and socket option. 2010-08-28 17:59:51 +00:00
sctputil.c Fix some CLANG warnings. One clang warning is left 2010-09-05 13:41:45 +00:00
sctputil.h * Fix some race condition in SACK/NR-SACK processing. 2010-04-03 15:40:14 +00:00
siftr.c - Move common code from the hook functions that fills in a packet node struct to 2010-07-18 05:09:10 +00:00
tcp_debug.c Remove the "The option TCPDEBUG requires option INET." requirement. 2009-06-10 10:39:41 +00:00
tcp_debug.h
tcp_fsm.h
tcp_hostcache.c MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
tcp_hostcache.h
tcp_input.c Use timestamp modulo comparison macro for automatic receive buffer 2010-08-27 12:34:53 +00:00
tcp_lro.c
tcp_lro.h
tcp_offload.c Merge the remainder of kern_vimage.c and vimage.h into vnet.c and 2009-08-01 19:26:27 +00:00
tcp_offload.h Replace struct tcpopt with a proxy toeopt struct in the TOE driver interface to 2009-07-13 11:51:02 +00:00
tcp_output.c If a TCP connection has been idle for one retransmit timeout or more 2010-08-18 18:05:54 +00:00
tcp_reass.c MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
tcp_sack.c MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
tcp_seq.h
tcp_subr.c Simplify the tcp pcblist estimate logic slightly. 2010-08-27 18:17:46 +00:00
tcp_syncache.c Initializing the new error variable to zero in syncache_socket() 2010-08-15 13:07:08 +00:00
tcp_syncache.h Replace struct tcpopt with a proxy toeopt struct in the TOE driver interface to 2009-07-13 11:51:02 +00:00
tcp_timer.c - spread tcp timer callout load evenly across cpus if net.inet.tcp.per_cpu_timers is set to 1 2010-03-20 19:47:30 +00:00
tcp_timer.h Add the ability to see TCP timers via netstat -x. This can be a useful 2009-09-16 05:33:15 +00:00
tcp_timewait.c MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
tcp_usrreq.c Add a comment to tcp_usr_accept() to indicate why it is we acquire the 2010-03-06 21:38:31 +00:00
tcp_var.h If a TCP connection has been idle for one retransmit timeout or more 2010-08-18 18:05:54 +00:00
tcp.h Change the default MSS for IPv4 and IPv6 TCP connections from an 2010-09-15 10:39:30 +00:00
tcpip.h
toedev.h
udp_usrreq.c Ensure a minimum "slop" of 10 extra pcb structures when providing a 2010-08-17 16:41:16 +00:00
udp_var.h MFP4: @176978-176982, 176984, 176990-176994, 177441 2010-04-29 11:52:42 +00:00
udp.h Added support for NAT-Traversal (RFC 3948) in IPsec stack. 2009-06-12 15:44:35 +00:00