Eric van Gyzen 2d9db0bc63 Add GARP retransmit capability ... A single gratuitous ARP (GARP) is always transmitted when an IPv4 address is added to an interface, and that is usually sufficient. However, in some circumstances, such as when a shared address is passed between cluster nodes, this single GARP may occasionally be dropped or lost. This can lead to neighbors on the network link working with a stale ARP cache and sending packets destined for that address to the node that previously owned the address, which may not respond. To avoid this situation, GARP retransmissions can be enabled by setting the net.link.ether.inet.garp_rexmit_count sysctl to a value greater than zero. The setting represents the maximum number of retransmissions. The interval between retransmissions is calculated using an exponential backoff algorithm, doubling each time, so the retransmission intervals are: {1, 2, 4, 8, 16, ...} (seconds). Due to the exponential backoff algorithm used for the interval between GARP retransmissions, the maximum number of retransmissions is limited to 16 for sanity. This limit corresponds to a maximum interval between retransmissions of 2^16 seconds ~= 18 hours. Increasing this limit is possible, but sending out GARPs spaced days apart would be of little use. Submitted by: David A. Bright <david.a.bright@dell.com> MFC after: 1 month Relnotes: yes Sponsored by: Dell EMC Differential Revision: https://reviews.freebsd.org/D7695		2016-10-02 01:42:45 +00:00
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cc	Pass the number of segments coalesced by LRO up the stack by repurposing the	2016-08-25 13:33:32 +00:00
khelp
libalias	sys/net*: minor spelling fixes.	2016-05-03 18:05:43 +00:00
tcp_stacks	Adjust TCP module fastpath after r304803's cc_ack_received() changes.	2016-08-26 19:23:17 +00:00
accf_data.c
accf_dns.c
accf_http.c
icmp6.h	Add missing constants from RFCs 4443 and 6550	2016-06-06 00:35:45 +00:00
icmp_var.h
if_atm.c
if_atm.h
if_ether.c	Add GARP retransmit capability	2016-10-02 01:42:45 +00:00
if_ether.h	This change re-adds L2 caching for TCP and UDP, as originally added in D4306	2016-06-02 17:51:29 +00:00
igmp_var.h
igmp.c	With clang 3.9.0, compiling sys/netinet/igmp.c results in the following	2016-09-04 17:23:10 +00:00
igmp.h
in_cksum.c
in_debug.c
in_fib.c
in_fib.h
in_gif.c
in_jail.c	Move IPv4-specific jail functions to new file netinet/in_jail.c	2016-08-09 02:16:21 +00:00
in_kdtrace.c
in_kdtrace.h
in_mcast.c	sys/net*: minor spelling fixes.	2016-05-03 18:05:43 +00:00
in_pcb.c	This change re-adds L2 caching for TCP and UDP, as originally added in D4306	2016-06-02 17:51:29 +00:00
in_pcb.h	Add spares to struct ifnet and socket for packet pacing and/or general	2016-06-23 21:07:15 +00:00
in_pcbgroup.c	Unbreak the RSS/PCBGROUp build.	2016-03-31 00:53:23 +00:00
in_prot.c	Remove BSD and USL copyright and update license block in in_prot.c, as the	2016-07-28 18:39:30 +00:00
in_proto.c	The pr_destroy field does not allow us to run the teardown code in a	2016-06-01 10:14:04 +00:00
in_rmx.c	Code duplication but rib_head is special. Not found an easy way to go	2016-02-03 21:56:51 +00:00
in_rss.c
in_rss.h
in_systm.h	Prepare for network stack as a module	2016-07-27 20:34:09 +00:00
in_var.h	Add GARP retransmit capability	2016-10-02 01:42:45 +00:00
in.c	Add GARP retransmit capability	2016-10-02 01:42:45 +00:00
in.h	Don't iterate over the ifnet addr list in ip_output()	2016-08-18 22:59:00 +00:00
ip6.h
ip_carp.c
ip_carp.h
ip_divert.c	The pr_destroy field does not allow us to run the teardown code in a	2016-06-01 10:14:04 +00:00
ip_divert.h
ip_dummynet.h	Import Dummynet AQM version 0.2.1 (CoDel, FQ-CoDel, PIE and FQ-PIE).	2016-05-26 21:40:13 +00:00
ip_ecn.c
ip_ecn.h
ip_encap.c
ip_encap.h
ip_fastfwd.c	Cleanup unneded include "opt_ipfw.h".	2016-06-09 05:48:34 +00:00
ip_fw.h	Add stats reset command implementation to NPTv6 module	2016-08-13 16:45:14 +00:00
ip_gre.c
ip_icmp.c	When sending in ICMP response to an SCTP packet,	2016-05-25 22:16:11 +00:00
ip_icmp.h	Add support for handling ICMP and ICMP6 messages sent in response	2016-04-29 20:22:01 +00:00
ip_id.c	Replace a number of conflations of mp_ncpus and mp_maxid with either	2016-07-06 14:09:49 +00:00
ip_input.c	Remove the 4.3BSD compatible macro m_copy(), use m_copym() instead.	2016-09-15 07:41:48 +00:00
ip_ipsec.c	Remove the kernel optoion for IPSEC_FILTERTUNNEL, which was deprecated	2016-08-21 18:55:30 +00:00
ip_ipsec.h
ip_mroute.c	Remove the 4.3BSD compatible macro m_copy(), use m_copym() instead.	2016-09-15 07:41:48 +00:00
ip_mroute.h
ip_options.c	sys/net*: minor spelling fixes.	2016-05-03 18:05:43 +00:00
ip_options.h
ip_output.c	Don't iterate over the ifnet addr list in ip_output()	2016-08-18 22:59:00 +00:00
ip_reass.c
ip_var.h	The pr_destroy field does not allow us to run the teardown code in a	2016-06-01 10:14:04 +00:00
ip.h	sys/net*: minor spelling fixes.	2016-05-03 18:05:43 +00:00
pim_var.h
pim.h
raw_ip.c	Remove the 4.3BSD compatible macro m_copy(), use m_copym() instead.	2016-09-15 07:41:48 +00:00
sctp_asconf.c	Add the UDP encaps port as a parameter to sctp_add_remote_addr().	2016-04-30 14:25:00 +00:00
sctp_asconf.h
sctp_auth.c	Address a potential memory leak found a the clang static code analyzer	2016-07-16 07:48:01 +00:00
sctp_auth.h
sctp_bsd_addr.c	Remove ifa_list, use ifa_link (structure field) instead.	2016-09-28 13:29:11 +00:00
sctp_bsd_addr.h
sctp_cc_functions.c	netinet/sctp*: minor spelling fixes in comments.	2016-05-02 20:56:11 +00:00
sctp_constants.h	Fix the PR-SCTP behaviour.	2016-07-17 13:14:51 +00:00
sctp_crc32.c
sctp_crc32.h
sctp_dtrace_declare.h
sctp_dtrace_define.h	This is work done by Michael Tuexen and myself at the IETF. This	2016-04-07 09:10:34 +00:00
sctp_header.h	Fix the PR-SCTP behaviour.	2016-07-17 13:14:51 +00:00
sctp_indata.c	Fix the handling of unordered fragmented user messages using DATA chunks.	2016-09-21 08:28:18 +00:00
sctp_indata.h	A couple of minor changes that I missed that Michael had done, most noted	2016-04-07 09:34:41 +00:00
sctp_input.c	Fix a bug, where no SACK is sent when receiving a FORWARD-TSN or	2016-08-26 07:49:23 +00:00
sctp_input.h
sctp_lock_bsd.h	netinet/sctp*: minor spelling fixes in comments.	2016-05-02 20:56:11 +00:00
sctp_os_bsd.h	A couple of minor changes that I missed that Michael had done, most noted	2016-04-07 09:34:41 +00:00
sctp_os.h
sctp_output.c	Improve the locking when sending user messages.	2016-08-22 01:45:29 +00:00
sctp_output.h	Don't allow a remote encapsulation port change during the	2016-01-30 12:58:38 +00:00
sctp_pcb.c	Remove stream queue entry consistently from wheel.	2016-08-07 12:51:13 +00:00
sctp_pcb.h	netinet/sctp*: minor spelling fixes in comments.	2016-05-02 20:56:11 +00:00
sctp_peeloff.c
sctp_peeloff.h
sctp_ss_functions.c	Mark an unused parameter as such.	2016-08-06 12:51:07 +00:00
sctp_structs.h	Fix various bugs in relation to the I-DATA chunk support	2016-08-06 12:33:15 +00:00
sctp_syscalls.c	capsicum: propagate rights on accept(2)	2016-09-22 09:58:46 +00:00
sctp_sysctl.c	netstat and sockstat expect the IPv6 link local addresses to	2016-07-19 09:48:08 +00:00
sctp_sysctl.h	Retire net.inet.sctp.strict_sacks and net.inet.sctp.strict_data_order	2016-05-12 16:34:59 +00:00
sctp_timer.c	Cleanup a comment.	2016-05-09 16:35:05 +00:00
sctp_timer.h	Code cleanup which will silence a warning in PVS / D5245.	2016-02-17 18:04:22 +00:00
sctp_uio.h	Add a constant required by RFC 7496.	2016-07-17 13:33:35 +00:00
sctp_usrreq.c	Remove duplicate code, which is not protected by the appropriate locks.	2016-08-22 00:40:45 +00:00
sctp_var.h	The pr_destroy field does not allow us to run the teardown code in a	2016-06-01 10:14:04 +00:00
sctp.h	This is work done by Michael Tuexen and myself at the IETF. This	2016-04-07 09:10:34 +00:00
sctputil.c	When aborting an association, send the ABORT before notifying the upper	2016-08-24 06:22:53 +00:00
sctputil.h	Remove a function, which is not used anymore.	2016-04-23 09:15:58 +00:00
siftr.c	Use SI_SUB_LAST instead of SI_SUB_SMP as the "catch-all" subsystem.	2016-03-11 23:18:06 +00:00
tcp_debug.c
tcp_debug.h
tcp_fastopen.c	Fix kernel build with TCP_RFC7413 option	2016-08-11 23:52:24 +00:00
tcp_fastopen.h
tcp_fsm.h	Update TCPS_HAVERCVDFIN() macro to correctly include all states a connection	2016-08-26 17:48:54 +00:00
tcp_hostcache.c	This adds a sysctl which allows you to disable the TCP hostcache. This is handy	2016-09-30 00:10:57 +00:00
tcp_hostcache.h
tcp_input.c	Properly preserve ip_tos bits for IPv4 packets	2016-09-29 19:45:24 +00:00
tcp_lro.c	Pass the number of segments coalesced by LRO up the stack by repurposing the	2016-08-25 13:33:32 +00:00
tcp_lro.h	tcp/lro: Implement hash table for LRO entries.	2016-08-02 06:36:47 +00:00
tcp_offload.c	Augment struct tcpstat with tcps_states[], which is used for book-keeping	2016-01-27 00:45:46 +00:00
tcp_offload.h
tcp_output.c	Remove the 4.3BSD compatible macro m_copy(), use m_copym() instead.	2016-09-15 07:41:48 +00:00
tcp_pcap.c	The TCPPCAP debugging feature caches recently-used mbufs for use in	2016-07-06 16:17:13 +00:00
tcp_pcap.h	The TCPPCAP debugging feature caches recently-used mbufs for use in	2016-07-06 16:17:13 +00:00
tcp_reass.c
tcp_sack.c	sys/net*: minor spelling fixes.	2016-05-03 18:05:43 +00:00
tcp_seq.h
tcp_subr.c	Here we update the modular tcp to be able to switch to an	2016-08-16 15:11:46 +00:00
tcp_syncache.c	Fix an issue with accept_filter introduced with r261242:	2016-09-29 11:18:48 +00:00
tcp_syncache.h	Grab a snap amount of TCP connections in syncache from tcpstat.	2016-01-27 00:48:05 +00:00
tcp_timer.c	A few more wording tweaks as suggested (with some modifications	2016-08-16 15:17:36 +00:00
tcp_timer.h	This cleans up the timer code in TCP and also makes it so we do not	2016-08-16 12:40:56 +00:00
tcp_timewait.c	No longer mark TCP TW zone NO_FREE.	2016-06-23 00:32:58 +00:00
tcp_usrreq.c	Ensure that the IPPROTO_TCP level socket options	2016-09-14 14:48:00 +00:00
tcp_var.h	Pass the number of segments coalesced by LRO up the stack by repurposing the	2016-08-25 13:33:32 +00:00
tcp.h
tcpip.h
toecore.c	This change re-adds L2 caching for TCP and UDP, as originally added in D4306	2016-06-02 17:51:29 +00:00
toecore.h
udp_usrreq.c	r297225 broke udp_output() for the case where the "addr" argument	2016-10-01 19:39:09 +00:00
udp_var.h	The pr_destroy field does not allow us to run the teardown code in a	2016-06-01 10:14:04 +00:00
udp.h
udplite.h