Hans Petter Selasky 17cc6689eb MFC 9febbc4541: ... Fix for natd(8) sending wrong sequence number after TCP retransmission, terminating a TCP connection. If a TCP packet must be retransmitted and the data length has changed in the retransmitted packet, due to the internal workings of TCP, typically when ACK packets are lost, then there is a 30% chance that the logic in GetDeltaSeqOut() will find the correct length, which is the last length received. This can be explained as follows: If a "227 Entering Passive Mode" packet must be retransmittet and the length changes from 51 to 50 bytes, for example, then we have three cases for the list scan in GetDeltaSeqOut(), depending on how many prior packets were received modulus N_LINK_TCP_DATA=3: case 1: index 0: original packet 51 index 1: retransmitted packet 50 index 2: not relevant case 2: index 0: not relevant index 1: original packet 51 index 2: retransmitted packet 50 case 3: index 0: retransmitted packet 50 index 1: not relevant index 2: original packet 51 This patch simply changes the searching order for TCP packets, always starting at the last received packet instead of any received packet, in GetDeltaAckIn() and GetDeltaSeqOut(). Else no functional changes. Discussed with: rscheff@ Submitted by: Andreas Longwitz <longwitz@incore.de> PR: 230755 Sponsored by: Mellanox Technologies // NVIDIA Networking (cherry picked from commit 9febbc4541)		2021-03-03 10:47:44 +01:00
..
alias.c	libalias: Fix remaining compiler warnings	2021-01-19 21:23:24 +00:00
alias.h	Allow setting alias port ranges in libalias and ipfw.	2021-02-17 10:13:54 -08:00
alias_db.c	MFC 9febbc4541:	2021-03-03 10:47:44 +01:00
alias_dummy.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_ftp.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_irc.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_local.h	Allow setting alias port ranges in libalias and ipfw.	2021-02-17 10:13:54 -08:00
alias_mod.c	libalias: Fix remaining compiler warnings	2021-01-19 21:23:24 +00:00
alias_mod.h	malloc: try to use builtins for zeroing at the callsite	2018-06-02 22:20:09 +00:00
alias_nbt.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_pptp.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_proxy.c	libalias: Fix -Wcast-align compiler warnings	2021-01-19 21:23:24 +00:00
alias_sctp.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_sctp.h	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_skinny.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_smedia.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
alias_util.c	net: clean up empty lines in .c and .h files	2020-09-01 21:19:14 +00:00
HISTORY
libalias.3	libalias: Fix -Wcast-align compiler warnings	2021-01-19 21:23:24 +00:00