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84ebe1cdae
Lost connections was reported by Thomas Bätzler (running 2.6.25 kernel) on the netfilter mailing list (see the thread "Weird nat/conntrack Problem with PASV FTP upload"). He provided tcpdump recordings which helped to find a long lingering bug in conntrack. In TCP connection tracking, checking the lower bound of valid ACK could lead to mark valid packets as INVALID because: - We have got a "higher or equal" inequality, but the test checked the "higher" condition only; fixed. - If the packet contains a SACK option, it could occur that the ACK value was before the left edge of our (S)ACK "window": if a previous packet from the other party intersected the right edge of the window of the receiver, we could move forward the window parameters beyond accepting a valid ack. Therefore in this patch we check the rightmost SACK edge instead of the ACK value in the lower bound of valid (S)ACK test. Signed-off-by: Jozsef Kadlecsik <kadlec@blackhole.kfki.hu> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net> |
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| .. | ||
| core.c | ||
| Kconfig | ||
| Makefile | ||
| nf_conntrack_amanda.c | ||
| nf_conntrack_core.c | ||
| nf_conntrack_ecache.c | ||
| nf_conntrack_expect.c | ||
| nf_conntrack_extend.c | ||
| nf_conntrack_ftp.c | ||
| nf_conntrack_h323_asn1.c | ||
| nf_conntrack_h323_main.c | ||
| nf_conntrack_h323_types.c | ||
| nf_conntrack_helper.c | ||
| nf_conntrack_irc.c | ||
| nf_conntrack_l3proto_generic.c | ||
| nf_conntrack_netbios_ns.c | ||
| nf_conntrack_netlink.c | ||
| nf_conntrack_pptp.c | ||
| nf_conntrack_proto_dccp.c | ||
| nf_conntrack_proto_generic.c | ||
| nf_conntrack_proto_gre.c | ||
| nf_conntrack_proto_sctp.c | ||
| nf_conntrack_proto_tcp.c | ||
| nf_conntrack_proto_udp.c | ||
| nf_conntrack_proto_udplite.c | ||
| nf_conntrack_proto.c | ||
| nf_conntrack_sane.c | ||
| nf_conntrack_sip.c | ||
| nf_conntrack_standalone.c | ||
| nf_conntrack_tftp.c | ||
| nf_internals.h | ||
| nf_log.c | ||
| nf_queue.c | ||
| nf_sockopt.c | ||
| nfnetlink_log.c | ||
| nfnetlink_queue.c | ||
| nfnetlink.c | ||
| x_tables.c | ||
| xt_CLASSIFY.c | ||
| xt_comment.c | ||
| xt_connbytes.c | ||
| xt_connlimit.c | ||
| xt_connmark.c | ||
| xt_CONNMARK.c | ||
| xt_CONNSECMARK.c | ||
| xt_conntrack.c | ||
| xt_dccp.c | ||
| xt_dscp.c | ||
| xt_DSCP.c | ||
| xt_esp.c | ||
| xt_hashlimit.c | ||
| xt_helper.c | ||
| xt_iprange.c | ||
| xt_length.c | ||
| xt_limit.c | ||
| xt_mac.c | ||
| xt_mark.c | ||
| xt_MARK.c | ||
| xt_multiport.c | ||
| xt_NFLOG.c | ||
| xt_NFQUEUE.c | ||
| xt_NOTRACK.c | ||
| xt_owner.c | ||
| xt_physdev.c | ||
| xt_pkttype.c | ||
| xt_policy.c | ||
| xt_quota.c | ||
| xt_rateest.c | ||
| xt_RATEEST.c | ||
| xt_realm.c | ||
| xt_sctp.c | ||
| xt_SECMARK.c | ||
| xt_state.c | ||
| xt_statistic.c | ||
| xt_string.c | ||
| xt_tcpmss.c | ||
| xt_TCPMSS.c | ||
| xt_TCPOPTSTRIP.c | ||
| xt_tcpudp.c | ||
| xt_time.c | ||
| xt_TRACE.c | ||
| xt_u32.c | ||