* Fri Jun 23 2006 Brendan O'Dea 2.2.0 - Only poll clifd if successfully bound. - Add "Practical VPNs" document from Liran Tal as Docs/vpn . - Add Multilink support from Khaled Al Hamwi. - Remove non-working setuid option. - Convert manual.html to Docbook. - Kludge around problem with Netgear DM602 authentication. - Add session/idle timeouts (Graham Maltby). - Use result code AVP to set Acct-Terminate-Cause is disconnect cause AVP is not present. * Tue Apr 18 2006 Brendan O'Dea 2.1.18 - Don't shutdown on TerminateReq, wait for CDN. - Interpret "local" direction correctly (as LAC) in disconnect AVPs. * Thu Apr 13 2006 Brendan O'Dea 2.1.17 - Fix IPCP length test to allow Terminate-Request (4 bytes). - Send nsctl responses back using the correct source address (thanks ltd). - Similarly set the source for DAE responses; use bind_address when handling forwarded packets on the master. - Add Acct-Terminate-Cause to RADIUS stop records. * Thu Feb 23 2006 Brendan O'Dea 2.1.16 - Send configured magic-no in LCP EchoReq when LCP is opened. - Correct addition of single IP to pool (Jonathan Yarden). - Ensure session changes from LCP ConfigReq/ConfigNak are sent to cluster. - Verify that RADIUS packets come from a configured server (Jonathan Yarden). - Avoid endless loop in processipcp, processipv6cp. - Additional length checks in processlcp. - Allow peer to request a new magic-number, or to disable magic-numbers. - Decrease ip_conntrack_tcp_timeout_established to 5hrs (table filling). * Mon Dec 19 2005 Brendan O'Dea 2.1.15 - Drop backtrace. - Reduce logging of LCP EchoReply packets. - Break LCP configure loop with shutdown. - Limit value of MRU of 1492 (rfc2516). - Tun MTU should be MRU (not MRU+4). - Add Service-Type/Framed-Protocol to RADIUS records (Paul Martin). * Fri Dec 9 2005 Brendan O'Dea 2.1.14 - Run PLUGIN_RADIUS_ACCOUNT for Start records. * Wed Dec 7 2005 Brendan O'Dea 2.1.13 - Add test/ping-sweep. - Apply spec changes from Charlie Brady: use License header, change BuildRoot to include username. - Fix IPCP negotiation of secondary DNS server, reported by Jon Morby. - Clean up sessiont, removing some unused fields. - Remove unused "MAC" config type. - Reject unknown/unconfigured protocols on the master. - Sanity check MRU before using in ppp_code_rej, protoreject. * Thu Nov 17 2005 Brendan O'Dea 2.1.12 - Set MTU on tunnel interface so the kernel will re-fragment large packets to within MRU. - Fix TCP checksum recalc. - NAK silly MRU values from peer. * Mon Nov 14 2005 Brendan O'Dea 2.1.11 - Fix fragment handling in ip_filter. - Exclude counter when comparing filter rules. * Sat Nov 5 2005 Brendan O'Dea 2.1.10 - Add scripts/l2tpns-capture. - Fix LCP Echo frequency. - Add Framed-Route entries to RADIUS records. - Reset restart counters correctly. - Reset timers on sending ConfigReq. - Only send one RADIUS Start record, even if IPCP is restarted. * Tue Oct 11 2005 Brendan O'Dea 2.1.9 - Fix Calling-Station-Id in RADIUS accounting records (Slobodan Tomic). - Fix RADIUS authentication on DAE responses. - Don't send tunnel HELLO when there are pending control messages. - Move plugin_radius_reset from *ctl to auto* plugins. - Add Cisco-AVPairs to RADIUS accounting records via plugin_radius_account. * Mon Sep 19 2005 Brendan O'Dea 2.1.8 - Move code from signal handlers into mainloop, avoiding a race condition when forking CLI. * Fri Sep 16 2005 Brendan O'Dea 2.1.7 - This time, for sure: really fix Protocol-Reject. * Fri Sep 16 2005 Brendan O'Dea 2.1.6 - Any traffic on a tunnel resets lastrec, not just control messages. - Use a unique identifier for LCP. - Fix Code-Reject/Protocol-Reject. - Add l2tp_mtu configuration option, used to define MRU, MSS. - Adjust TCP MSS options in SYN and SYN,ACK packets to avoid fragmentation of tcp packets. * Sat Sep 3 2005 Brendan O'Dea 2.1.5 - Avoid Code-Reject loop. - Increase size of PPP buffers to MAXETHER. - Bug fixes for CLI ringbuffer and tunnel HELLO from Yuri. - Restart rather than halt BGP on receipt of CEASE (Dominique Rousseau). - Add cluster_mcast_ttl option to allow a cluster to span multiple subnets (suggested by Tim Devries). * Mon Aug 29 2005 Brendan O'Dea 2.1.4 - Drop level of "Unexpected CHAP message" log. - Fix parsing of ProtocolRej (allow 1 or two byte protocols). - Handle rejection of MRU negotiation by peer. - Use local hostname for tunnel in SCCRP (Alex Kiernan). * Wed Aug 17 2005 Brendan O'Dea 2.1.3 - Fail IPCP negotiation only on ConfigRej of IP-Address. * Wed Aug 10 2005 Brendan O'Dea 2.1.2 - Clear cluster_master on election so that slaves will accept a new master. - Provide more comments/defaults in etc/startup-config.default. - Add DAE support (PoD/CoA) from Vladislav Bjelic. - Clean up new warnings from gcc 4.0. - Replace flags used for LCP/IPCP with state machine. - Include Acct-Session-Time in interim records. - Fix DAE vector, generateload (Alex Kiernan). - Replace RSA MD5 with public domain version. * Tue Jun 14 2005 Brendan O'Dea 2.1.1 - Add missing newline to backtrace macro. - Don't send CDN for each session when shutting down tunnels (this is implicit). - Move tunnel shutdown from SIGQUIT signal handler to be run once from still_busy(). Reject new tunnels/sessions while in the process of shutting down. - Clarify usage of shutdown signals in documentation. - Always initialise PRNG. - Sanity check length of random_vector. - Fix segv in unhide_value. - Ping new master when we get C_MASTER and delay next election to allow the unicast limp-along code to kick in if required. * Sun Jun 5 2005 Brendan O'Dea 2.1.0 - Add IPv6 support from Jonathan McDowell. - Add CHAP support from Jordan Hrycaj. - Add interim accounting support from Vladislav Bjelic. - Negotiate MRU, default 1458 to avoid fragmentation. - Sanity check that cluster_send_session is not called from a child process. - Use bounds-checking lookup functions for string constants. - Add enum for RADIUS codes. - Make "call_" prefix implict in CSTAT() macro. - Fix some format string problems. - Remove "save_state" option. Not maintained anymore; use clustering to retain state across restarts. - Simplify AVP unhiding code. - Add optional "username" parameter to ungarden control, allowing the username to be reset before going online. - Add result/error codes and message to StopCCN when shutting down tunnels. - Add result/error codes to CDN when shutting down sessions. Sends 2/7 (general error, try another LNS) when out of IP addresses, and 3 (adminstrative) for everything else (suggestion from Chris Gates). - Use cli_error() for error messages and help. - Don't use LOG() macro in initdata() until the config struct has been allocated (uses config->debug). - Initialise log_stream to stderr to catch errors before the config file is read. - Make "show running-config" a privileged command (contains clear text shared secrets). - Add sessionctl plugin to provide drop/kill via nsctl. - New config option: allow_duplicate_users which determines whether or not to kill older sessions with the same username. - Fix byte counters in accounting records. - Add Acct-Output-Gigawords, Acct-Input-Gigawords attributes to RADIUS accounting packets. - Fix icmp host unreachable to use router address. - Include endpoint address in accounting dump files. - Convert mainloop to use epoll rather than select. - Add note about fragmentation in Docs/manual.html, and a sample iptables rule for MSS clamping. - Merge 2.0.22: + Show session open time in "show session"/"show user" detailed output. + Have slaves with BGP configured drop BGP on receipt of a shutdown signal, but hang about for an additional 5s to process any remaining traffic. + Run regular_cleanups after processing the results of the select, looking at a sufficient slice of each table to ensure that all entries are examined at least once per second. - Merge 2.0.21: + Cluster changes from Michael, intended to prevent a stray master from trashing a cluster: = Ignore heartbeats from peers claiming to be the master before the timeout on the old master has expired. = A master receiving a stray heartbeat sends a unicast HB back, which should cause the rogue to die due to the tie-breaker code. = Keep probing the master for late heartbeats. = Drop BGP as soon as we become master with the minumum required peers. = Any PING seen from a master forces an election (rather than just where basetime is zero). = A slave which receives a LASTSEEN message (presumably a restarted master) sends back new message type, C_MASTER which indicates the address of the current master. + New config option: cluster_master_min_adv which determines the minimum number of up to date slaves required before the master will drop routes. - Merge 2.0.20: + Add handling of "throttle=N" RADIUS attributes. + Fix RADIUS indexing (should have 16K entries with 64 sockets). - Merge 2.0.19: + Fix leak in session freelist when initial RADIUS session allocation fails. - Merge 2.0.18: + Add a Cisco-Avpair with intercept details to RADIUS Start/Stop records. - Merge 2.0.17: + Only send RADIUS stop record in sessionshutdown when there's an ip address. + Reset .die on master takeover (so that dying sessions don't have to hang around until the new master has the same uptime as the old one). + Update .last_packet in cluster_handle_bytes only when there have been bytes received from the modem (dead sessions were having the idle timeout reset by stray packets). - Merge 2.0.16: + Ensure that sessionkill is not called on an unopened session (borks the freelist). + Bump MAXSESSION to 60K. + Fix off-by-one errors in session/tunnel initialisation and sessiont <-> sessionidt functions. + Use session[s].opened consistently when checking for in-use sessions (rather than session[s].tunnel). + Use <= cluster_highest_sessionid rather than < MAXSESSION in a couple of loops. + Don't kill a whole tunnel if we're out of sessions. + Change session[s].ip to 0 if set from RADIUS to 255.255.255.254; avoids the possibility that it will be interpreted as a valid IP address. + Avoid a possible buffer overflow in processpap. + Kill session if authentication was rejected. - Merge 2.0.15: + More DoS prevention: add packet_limit option to apply a hard limit to downstream packets per session. + Fix "clear counters". + Log "Accepted connection to CLI" at 4 when connection is from localhost to reduce noise in logs. + Show time since last counter reset in "show counters". - Merge 2.0.14: + Throttle outgoing LASTSEEN packets to at most one per second for a given seq#. * Fri Dec 17 2004 Brendan O'Dea 2.0.13 - Better cluster master collision resolution: keep a counter of state changes, propagated in the heartbeats; the master with the highest # of changes (that has kept in contact with the LAC through the outage) prevails. - Skip newlines in ringbuffer messages to CLI. - Drop "Session N is closing" message level to 4; don't process PPPIP packets in this state. - Use gzip --best for man pages, include pid_file in sample startup-config (from Jonathan's Debian package patches). - Read multiple packets off cluster_sockfd as well as udpfd, tunfd in an attempt to avoid losing the cluster in high load (DoS) conditions. - Add counters for select_called, multi_read_used and multi_read_exceeded. - Compress logs. - Retain counters of shutdown sessions to dump once per minute. - Use standard uintN_t types for portability. * Wed Dec 1 2004 Brendan O'Dea 2.0.12 - The "This time, for sure!" release. - Fix throttlectl plugin argument parsing. * Wed Dec 1 2004 Brendan O'Dea 2.0.11 - Don't send a RADIUS start record when ungardening on shutdown. * Wed Dec 1 2004 Brendan O'Dea 2.0.10 - Fix byte ordering of LCP header length (thanks Yuri). - Increase ip_conntrack_max due to dropped packets. * Tue Nov 30 2004 Brendan O'Dea 2.0.9 - Revise CCP, send ConfigReq once only. - Don't copy the old buffer into Config{Nak,Rej} LCP responses (oops); add length checks when appending. - Do copy the identifier from the request and update length. - Have makeppp print a backtrace on overflow. - Check control serial before clearing window, prevents looping tunnel setup in some instances. - Implement named access-lists which may be applied to a session either via Filter-Id RADIUS responses, or using the CLI. - Drop ip address from LOG. - autothrottle: revise parsing; ignore lcp:interface-config avpairs which don't start with serv[ice-policy]. - Add THANKS file. * Sat Nov 20 2004 Brendan O'Dea 2.0.8 - Ignore gateway address in Framed-Route (from Jonathan McDowell). - Don't route Framed-IP-Address if contained in a Framed-Route. - Call sessionshutdown() when a tunnel is dropped rather than sessionkill() to ensure that RADIUS stop records are sent. - Cleanup: make a bunch of global functions/variables static. - Remove reference to old -a command line argument. - Add l2tpns(8) and nsctl(8) manpages from Jonathan McDowell. - Add startup-config(5) manpage. - Revise nsctl to allow arbitrary strings/args to be passed to plugins. - Add snoopctl, throttlectl plugins. - Fix deletion from linked list. - Allow LCP re-negotiation after connection completes (thanks Yuri). * Mon Nov 15 2004 Brendan O'Dea 2.0.7 - Fix socket creation in host_unreachable() (thanks to Bjørn Augestad) - Don't assume BGP peer sends back negotiated hold time, pick smallest * Thu Nov 11 2004 Brendan O'Dea 2.0.6 - Make BGP keepalive/hold time configurable - Revise BGP config to use "router bgp AS" syntax (requires libcli >= 1.8.2) * Tue Nov 9 2004 Brendan O'Dea 2.0.5 - Handle routing properly in lone-master case - Fix intercepts: don't double-snoop throttled customers, ensure byte/packet counts are only updated once - Add a callback to allow plugins to fetch values from the running config * Mon Nov 8 2004 Brendan O'Dea 2.0.4 - Added setrxspeed plugin - Added peer_address config option - Rename wrapper macros to LOG()/LOG_HEX(), use p->log() in plugins - Replace some PPP{PAP,CHAP} magic numebrs with constants - Nak asyncmap (unless == 0) - Bundle ConfigRej options - Clean up initlcp handling * Wed Nov 3 2004 Brendan O'Dea 2.0.3 - Added support for hidden AVPs by Robert Clark - l2tpns-chap-response.patch from Robert Clark - Merge l2tpns-config-hostname.patch from Robert Clark - l2tpns-dont-timeshift-unidirectional-traffic.patch from Robert Clark - Dump accounting data if cin OR cout is non-zero - Don't write accounting files if no accounting dir is set - Yuri - Fix checking for mmap success - Renegotiate MRU - Yuri - Take LCP ConfigReq length from the packet length field - Yuri - Hostname set via command line not config - Make number of throttle buckets configurable - Shared_malloc returns NULL on failure - Sync changes - Unfsck 4->8 indenting change - Use 2 seperate u16 values for throttle rate in/out - Defer adding radius fds to the select loop until become_master * Thu Sep 02 2004 David Parrish 2.0.2 - Combined LCP patches from Iain and Yuri. This should allow Windows 2k/XP clients to connect, as well Linksys DSL modems. - Apply patch to fix -v option from Juergen Kammer. - Makefile fix from Juergen Kammer to not overwrite existing config files on make install - Configurable radius port patch from Juergen Kammer. - Send my_address if no bind_address when doing IPCP - Write pid file if filename is set - Add startup script and monitor script from Yuri - Some logging correctness fixes from Iain Wade - Add support for LCP Ident and CallBack (rejection only) from Yuri - Initiate LCP if not attempted by the client, or in renegotiation - Yuri - Indentation and style cleanups - Per-user upload and download throttle rates - Yuri - Make autothrottle.so understand cisco lcp:interface-config - Yuri - Show filter stats in show session - Yuri - Cleanup from Michael to change sid to unique_id - Add plugin to remove domain name from auth requests - Add .spec file for RPM generation * Tue Jul 13 2004 Brendan O'Dea 2.0.1 - Update INSTALL, Docs/manual.html documentation. - Add INTERNALS documentation. - Add lock_pages option. - TerminateAck fix from Yuri - Adject cli_loop args for libcli 1.8.0 - Allow for backward compatabity in C_PING packets - Don't send RADIUS stop messages from sessionshutdown when called from sessionkill. - s/tap/tun/ . - Fix for LASTSEEN breakage: don't do anything in the CLI other than flag changes to be made by the parent. - Split out master parts from cluster_check_master() into cluster_check_slaves(). - Set hostname in CLI prompt. - Make cluster_hb_interval work; include interval/timeout in heartbeats so that a change on the master is propagated immediately to the slaves. - Use fast heartbeats when there are slaves not up to date. - Ensure basetime of shut down master is set to zero (prevent delayed election). - Fix radius session leak on IPCP timeout. - Fix some off-by-one errors in tunnel/session loops. - Add "limp along" fix for when a slave drops temporarily from the mcast group. - Rename l2tpns.cfg as startup-config to match CONFIGFILE. - Update cli callbacks to work with libcli 1.6. This supports privileged and unprivileged commands, as well as a configuration mode. - Add help for all cli commands. - Add "show version" command. - Fix uptime counter display. - Fix nasty bug where cluster basetime can be set to 0 when sending initial heartbeat. - Don't rmmod ip_conntrack, as this can take a lot of time. - Re-order logging in routeset such that the action is given before any error. - Use the correct gateway address when deleting routes. - Remove any routes when address changes. - Require authentication if telnet from remote ip. - Require enable password always. - Return error if show pool done on slave. - We MUST immediately exit if we're the wrong master! * Wed Jun 23 2004 David Parrish 2.0.0 - Major release - Completely replace active/standby clustering with a new peer-to-peer clustering method which allows much greater throughput and is a lot more fault tolerant - Add internal tbf implementation for throttling without relying on tc and kernel HTB - Add support for iBGP and eBGP to advertise routes - Add cli commands "show cluster", "show bgp", "show ipcache", "show throttle", "show tbf", "suspend bgp", "restart bgp", "show user" - Interception destination must be set per-user - If SMP machine, allow use of SCHED_FIFO, which should improve performance - Added config option to send GARP at startup - Added plugin_become_master and plugin_new_session_master plugin hooks - Remove useless sessionsendarp(). This isn't needed now that we are using TUN instead of TAP. - ICMP rate limiting so not every unreachable packet is replied with an ICMP unreachable message - mangle table is not required on anything but the cluster master, so slaves will drop the mangle table and attempt to unload the ip_conntrack module - Statically assigned IP addresses (by Radius) work now - Add -d command-line flag to detach and become a daemon - Configuration file is now "/etc/l2tpns/startup-config" - Reduced MIN_IP_SIZE to 0x19 to stop a pile of Short IP warnings - Resend initial IPCP request until it's acknowleged by the client - Better radius session cleanup logic - Many miscellaenous bugfixes and performance enhancements - Thanks to Michael O'Reilly and Brendan O'Dea for most of these new features * Mon May 24 2004 David Parrish 1.2.0 - Fix SEGFAULT in garden module - Use multiple radius sockets to allow more concurrent authentication requests - Add username parameter to "show users" command - Fix counting tunnel rx errors as tunnel tx errors - Add "show throttle" command - Add gcc __attribute__ to logging functions - Fix warnings shown by __attribute__ - Make sure regular cleanup happens regularly under high load - Add variable cleanup_interval for changing cleanup interval - Add support for reading more than one packet per fd in each processing loop - This is configurable with the multi_read_count variable - Remove segv handler so core dumps can happen - Use nonblocking sockets - Increase tun queue length - Fix minimum length of IP packets - Remove per-packet plugin hooks (they are slow) - Don't drop session if no free RADIUS - Don't expire more than 1000 sessions per cleanup interval - Remove -a and -c command-line options. They don't work anyway - Don't require file: in log_filename - Bump version to 1.2.0 - Check return code when throttling users * Mon Apr 5 2004 David Parrish 1.1.1 - Don't mention configure anymore, it's not used - Added the autosnoop and autothrottle modules - Don't default to using a htb for the class root * Fri Mar 5 2004 David Parrish 1.1.0 - Change all strcpy() calls to strncpy() to avoid buffer overflow potential - Add ICMP host unreachable support - Logging to syslog if log_file = "syslog:facility" - Now requires libcli 1.5 - All configuration moves to a config structure - Ability to modify and write config on the fly through command-line interface - Config file support is removed, and now handled by the cli - Show hostname in cli prompt - Keep current state type for tunnels - Add uptime command do CLI, which also shows real-time bandwidth utilisation - Add goodbye command to cluster master, which forces droppping a slave - Cache IP address allocation, so that reconnecting users get the same address - Fix tunnel resend timeouts, so that dead tunnels will be cleaned up - Allocate tunnels and radius without using a linked list which had issues - Fix some off-by-one errors in tunnel and session and radius arrays - Save and reload ip address pool when dieing - Check version and size of reloaded data when restarting - Remove plugin_config support - Remove old support for TBF which didn't work anyway. HTB is required to do throttling now. - Add COPYING and Changes files