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b3c0f300fb
freebsd-skq/sys/netinet
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Andre Oppermann b3c0f300fb Second step of TSO (TCP segmentation offload) support in our network stack. 
TSO is only used if we are in a pure bulk sending state.  The presence of
TCP-MD5, SACK retransmits, SACK advertizements, IPSEC and IP options prevent
using TSO.  With TSO the TCP header is the same (except for the sequence number)
for all generated packets.  This makes it impossible to transmit any options
which vary per generated segment or packet.

The length of TSO bursts is limited to TCP_MAXWIN.

The sysctl net.inet.tcp.tso globally controls the use of TSO and is enabled.

TSO enabled sends originating from tcp_output() have the CSUM_TCP and CSUM_TSO
flags set, m_pkthdr.csum_data filled with the header pseudo-checksum and
m_pkthdr.tso_segsz set to the segment size (net payload size, not counting
IP+TCP headers or TCP options).

IPv6 currently lacks a pseudo-header checksum function and thus doesn't support
TSO yet.

Tested by:	Jack Vogel <jfvogel-at-gmail.com>
Sponsored by:	TCP/IP Optimization Fundraise 2005
2006-09-07 12:53:01 +00:00
..
libalias o Kill BUGS section as it is not valid since rev. 1.4 alias_pptp.c. 2006-07-04 20:39:38 +00:00
accf_data.c
accf_http.c
icmp6.h sync with KAME regarding NDP 2005-10-21 16:23:01 +00:00
icmp_var.h
if_atm.c Add newline to debuging printf. 2005-08-26 15:27:18 +00:00
if_atm.h
if_ether.c There is a consensus that ifaddr.ifa_addr should never be NULL, 2006-06-29 19:22:05 +00:00
if_ether.h
igmp_var.h
igmp.c Consolidate all IP Options handling functions into ip_options.[ch] and 2005-11-18 20:12:40 +00:00
igmp.h
in_cksum.c
in_gif.c With exception of the if_name() macro, all definitions in net_osdep.h 2006-08-04 21:27:40 +00:00
in_gif.h
in_pcb.c o Backout rev. 1.125 of in_pcb.c. It appeared to behave extremely 2006-09-06 13:56:35 +00:00
in_pcb.h Fix race conditions on enumerating pcb lists by moving the initialization 2006-07-18 22:34:27 +00:00
in_proto.c Add RFC 3378 EtherIP support. This change makes it possible to add gif 2005-12-21 21:29:45 +00:00
in_rmx.c Complete timebase (time_second -> time_uptime) conversion. 2006-07-05 23:37:21 +00:00
in_systm.h
in_var.h Return mbuf pointer or NULL from ip_fastforward() as the mbuf pointer 2006-01-18 14:24:39 +00:00
in.c In in_control() remove the temporary in_ifaddr structure from the 2006-01-24 16:19:31 +00:00
in.h Fix a long-standing limitation in IPv4 multicast group membership. 2006-05-14 14:22:49 +00:00
ip6.h move RFC3542 related definitions into ip6.h. 2005-07-20 10:30:52 +00:00
ip_carp.c Revise network interface cloning to take an optional opaque 2006-07-09 06:04:01 +00:00
ip_carp.h o Introduce carp_multicast_cleanup(), which removes and frees 2006-03-21 14:29:48 +00:00
ip_divert.c Fix race conditions on enumerating pcb lists by moving the initialization 2006-07-18 22:34:27 +00:00
ip_divert.h
ip_dummynet.c Fix following rules: pipe X (tag|altq) Y ... 2006-06-08 11:13:23 +00:00
ip_dummynet.h When sending a packet from dummynet, indicate that we're forwarding 2006-02-14 06:36:39 +00:00
ip_ecn.c
ip_ecn.h
ip_encap.c With exception of the if_name() macro, all definitions in net_osdep.h 2006-08-04 21:27:40 +00:00
ip_encap.h
ip_fastfwd.c Remove the IPFIREWALL_FORWARD_EXTENDED option and make it on by default as it always was 2006-08-17 00:37:03 +00:00
ip_fw2.c Recognise IPv6 PIM packets. 2006-08-31 16:56:45 +00:00
ip_fw_pfil.c Reintroduce net.inet6.ip6.fw.enable sysctl to dis/enable the ipv6 processing 2006-05-12 04:41:27 +00:00
ip_fw.h comply with style police 2006-08-18 22:36:05 +00:00
ip_gre.c Fix the following bpf(4) race condition which can result in a panic: 2006-06-02 19:59:33 +00:00
ip_gre.h Fix stack corruptions on amd64. 2006-01-21 10:44:34 +00:00
ip_icmp.c Add descriptions for the sysctls: 2006-03-20 21:44:12 +00:00
ip_icmp.h
ip_id.c
ip_input.c Remove the IPFIREWALL_FORWARD_EXTENDED option and make it on by default as it always was 2006-08-17 00:37:03 +00:00
ip_ipsec.c Remove unneeded mac.h include. 2006-07-06 13:25:01 +00:00
ip_ipsec.h Move the IPSEC related code blocks to their own file to unclutter 2006-02-01 13:55:03 +00:00
ip_mroute.c Initialize the new members of struct ip_moptions as 2006-05-18 19:51:08 +00:00
ip_mroute.h Brain-o (use standard int types now). 2006-02-01 06:15:37 +00:00
ip_options.c Remove 'ipprintfs' which were protected under DIAGNOSTIC. It doesn't 2005-11-19 17:04:52 +00:00
ip_options.h Move MAX_IPOPTLEN and struct ipoption back into ip_var.h as 2005-11-19 14:01:32 +00:00
ip_output.c First step of TSO (TCP segmentation offload) support in our network stack. 2006-09-06 21:51:59 +00:00
ip_var.h Fix a long-standing limitation in IPv4 multicast group membership. 2006-05-14 14:22:49 +00:00
ip.h
ipprotosw.h
pim_var.h Remove public declarations of variables that were forgotten when they were 2005-08-10 07:10:02 +00:00
pim.h
raw_ip.c Check inp_flags instead of inp_vflag for INP_ONESBCAST flag. 2006-09-06 19:04:36 +00:00
tcp_debug.c
tcp_debug.h
tcp_fsm.h
tcp_hostcache.c
tcp_input.c First step of TSO (TCP segmentation offload) support in our network stack. 2006-09-06 21:51:59 +00:00
tcp_output.c Second step of TSO (TCP segmentation offload) support in our network stack. 2006-09-07 12:53:01 +00:00
tcp_reass.c First step of TSO (TCP segmentation offload) support in our network stack. 2006-09-06 21:51:59 +00:00
tcp_sack.c Eliminate debug code that catches bugs in the hinting of sack variables 2006-04-06 17:21:16 +00:00
tcp_seq.h Remove T/TCP RFC1644 Connection Count comparison macros. They are no longer 2006-06-18 14:24:12 +00:00
tcp_subr.c First step of TSO (TCP segmentation offload) support in our network stack. 2006-09-06 21:51:59 +00:00
tcp_syncache.c In syncache_respond() do not reply with a MSS that is larger than what 2006-06-26 17:54:53 +00:00
tcp_timer.c Remove a microoptimization for i386 that was a micropessimization for amd64. 2006-09-07 09:49:08 +00:00
tcp_timer.h Fixes an edge case bug in timewait handling where ticks rolling over causing 2006-08-11 21:15:23 +00:00
tcp_timewait.c First step of TSO (TCP segmentation offload) support in our network stack. 2006-09-06 21:51:59 +00:00
tcp_usrreq.c Change semantics of socket close and detach. Add a new protocol switch 2006-07-21 17:11:15 +00:00
tcp_var.h First step of TSO (TCP segmentation offload) support in our network stack. 2006-09-06 21:51:59 +00:00
tcp.h Add missing TH_PUSH to the TH_FLAGS enumeration. 2006-02-18 16:50:08 +00:00
tcpip.h
udp_usrreq.c Check inp_flags instead of inp_vflag for INP_ONESBCAST flag. 2006-09-06 19:04:36 +00:00
udp_var.h
udp.h