2 // $Id: l2tpns.h,v 1.121 2009-12-08 14:49:28 bodea Exp $
7 #include <netinet/in.h>
11 #include <netinet/in.h>
12 #include <net/ethernet.h>
13 #include <sys/socket.h>
14 #include <arpa/inet.h>
15 #include <sys/types.h>
18 #define VERSION "2.2.1-2sames3.14"
21 #define MAXTUNNEL 500 // could be up to 65535
22 #define MAXBUNDLE 300 // could be up to 65535
23 #define MAXBUNDLESES 12 // Maximum number of member links in bundle
24 #define MAXADDRESS 20 // Maximum length for the Endpoint Discrminiator address
25 #define MAXSESSION 60000 // could be up to 65535
26 #define MAXTBFS 6000 // Maximum token bucket filters. Might need up to 2 * session.
27 #define MAXSESSINGRP 12 // Maximum number of member links in grouped session
28 #define MAXGROUPE 300 // could be up to 65535, Maximum number of grouped session
29 #define MAXROUTEINGRP 15 // max static routes per group
31 // Tunnel Id reserved for pppoe
32 #define TUNNEL_ID_PPPOE 1
34 #define RADIUS_SHIFT 6
35 #define RADIUS_FDS (1 << RADIUS_SHIFT)
36 #define RADIUS_MASK ((1 << RADIUS_SHIFT) - 1)
37 #define MAXRADIUS (1 << (8 + RADIUS_SHIFT))
39 #define T_UNDEF (0xffff) // A tunnel ID that won't ever be used. Mark session as undefined.
40 #define T_FREE (0) // A tunnel ID that won't ever be used. Mark session as free.
42 #define MAXCONTROL 1000 // max length control message we ever send...
43 #define MINMTU 576 // minimum recommended MTU (rfc1063)
44 #define MAXMTU 2600 // arbitrary maximum MTU
45 #define PPPoE_MRU 1492 // maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2))
46 #define MAXETHER (MAXMTU+18) // max packet we try sending to tun
47 #define MAXTEL 96 // telephone number
48 #define MAXHOSTNAME 256 // hostname
49 #define MAXUSER 128 // username
50 #define MAXPASS 128 // password
51 #define MAXCLASS 128 // radius class attribute size
52 #define MAXPLUGINS 20 // maximum number of plugins to load
53 #define MAXRADSERVER 10 // max radius servers
54 #define MAXROUTE 10 // max static routes per session
55 #define MAXIPPOOL 131072 // max number of ip addresses in pool
56 #define RINGBUFFER_SIZE 10000 // Number of ringbuffer entries to allocate
57 #define MAX_LOG_LENGTH 512 // Maximum size of log message
58 #define ECHO_TIMEOUT 10 // Time between last packet sent and LCP ECHO generation
59 #define IDLE_ECHO_TIMEOUT 240 // Time between last packet seen and session shutdown
60 #define BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
62 #define MP_BEGIN 0x80 // This value is used when (b)egin bit is set in MP header
63 #define MP_END 0x40 // This value is used when (e)nd bit is set in MP header
64 #define MP_BOTH_BITS 0xC0 // This value is used when both bits (begin and end) are set in MP header
66 #define MINFRAGLEN 64 // Minumum fragment length
67 #define MAXFRAGLEN 1496 // Maximum length for Multilink fragment (The multilink may contain only one link)
68 #define MAXFRAGNUM 512 // Maximum number of Multilink fragment in a bundle (must be in the form of 2^X)
69 // it's not expected to have a space for more than 10 unassembled packets = 10 * MAXBUNDLESES
70 #define MAXFRAGNUM_MASK (MAXFRAGNUM - 1) // Must be equal to MAXFRAGNUM-1
72 // Multi bind address constants
74 #define MAX_BINDADDR MAX_UDPFD
75 // + 1 for the LAC Hostname
76 #define MAX_NBHOSTNAME (MAX_UDPFD + 1)
77 // 4 + 1 for the udplac
78 #define INIT_TABUDPFD {-1, -1, -1, -1, -1}
79 #define INIT_TABUDPVAR {0, 0, 0, 0, 0}
83 #define ETCDIR "/etc/l2tpns"
87 #define LIBDIR "/usr/lib/l2tpns"
91 #define PLUGINDIR LIBDIR // Plugins
95 #define PLUGINCONF ETCDIR // Plugin config dir
99 #define FLASHDIR ETCDIR
102 #define TUNDEVICE "/dev/net/tun"
103 #define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking
104 #define CONFIGFILE FLASHDIR "/startup-config" // Configuration file
105 #define CLIUSERS FLASHDIR "/users" // CLI Users file
106 #define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration
107 #define ACCT_TIME 3000 // 5 minute accounting interval
108 #define ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions
109 #define L2TPPORT 1701 // L2TP port
110 #define RADPORT 1645 // old radius port...
111 #define DAEPORT 3799 // DAE port
112 #define PKTARP 0x0806 // ARP packet type
113 #define PKTIP 0x0800 // IPv4 packet type
114 #define PKTIPV6 0x86DD // IPv6 packet type
115 #define PPPPAP 0xC023
116 #define PPPCHAP 0xC223
117 #define PPPLCP 0xC021
118 #define PPPIPCP 0x8021
119 #define PPPIPV6CP 0x8057
120 #define PPPCCP 0x80FD
122 #define PPPIPV6 0x0057
124 #define MIN_IP_SIZE 0x19
147 AccessChallenge
= 11,
148 DisconnectRequest
= 40,
179 // reset state machine counters
180 #define initialise_restart_count(_s, _fsm) \
181 sess_local[_s]._fsm.conf_sent = \
182 sess_local[_s]._fsm.nak_sent = 0
185 #define zero_restart_count(_s, _fsm) ({ \
186 sess_local[_s]._fsm.conf_sent = \
187 config->ppp_max_configure; \
188 sess_local[_s]._fsm.restart = \
189 time_now + config->ppp_restart_time; \
192 // increment ConfReq counter and reset timer
193 #define restart_timer(_s, _fsm) ({ \
194 sess_local[_s]._fsm.conf_sent++; \
195 sess_local[_s]._fsm.restart = \
196 time_now + config->ppp_restart_time; \
199 // stop timer on change to state where timer does not run
200 #define change_state(_s, _fsm, _new) ({ \
201 if (_new != session[_s].ppp._fsm) \
210 sess_local[_s]._fsm.restart = 0; \
211 initialise_restart_count(_s, _fsm); \
213 session[_s].ppp._fsm = _new; \
214 cluster_send_session(_s); \
219 typedef uint16_t sessionidt
;
220 typedef uint16_t bundleidt
;
221 typedef uint16_t tunnelidt
;
222 typedef uint16_t groupidt
;
223 typedef uint32_t clockt
;
224 typedef uint8_t hasht
[16];
227 struct cli_session_actions
{
237 #define CLI_SESS_KILL 0x01
238 #define CLI_SESS_SNOOP 0x02
239 #define CLI_SESS_NOSNOOP 0x04
240 #define CLI_SESS_THROTTLE 0x08
241 #define CLI_SESS_NOTHROTTLE 0x10
242 #define CLI_SESS_FILTER 0x20
243 #define CLI_SESS_NOFILTER 0x40
245 struct cli_tunnel_actions
{
249 #define CLI_TUN_KILL 0x01
252 typedef struct // route
259 typedef struct controls
// control message
261 struct controls
*next
; // next in queue
262 uint16_t length
; // length
263 uint8_t buf
[MAXCONTROL
];
268 uint8_t length
; // Endpoint Discriminator length
269 uint8_t addr_class
; // Endpoint Discriminator class
270 uint8_t address
[MAXADDRESS
]; // Endpoint Discriminator address
274 sessionidt sid
; // Fragment originating session
275 tunnelidt tid
; // Fragment originating tunnel
276 uint8_t flags
; // MP frame flags
277 uint32_t seq
; // fragment seq num
279 uint16_t length
; // Fragment length
280 uint8_t data
[MAXFRAGLEN
]; // Fragment data
285 sessionidt next
; // next session in linked list
286 sessionidt far
; // far end session ID
287 tunnelidt tunnel
; // near end tunnel ID
288 uint8_t flags
; // session flags: see SESSION_*
290 uint8_t phase
; // PPP phase
291 uint8_t lcp
:4; // LCP state
292 uint8_t ipcp
:4; // IPCP state
293 uint8_t ipv6cp
:4; // IPV6CP state
294 uint8_t ccp
:4; // CCP state
296 uint16_t mru
; // maximum receive unit
297 in_addr_t ip
; // IP of session set by RADIUS response (host byte order).
298 int ip_pool_index
; // index to IP pool
299 uint32_t unique_id
; // unique session id
300 uint32_t magic
; // ppp magic number
301 uint32_t pin
, pout
; // packet counts
302 uint32_t cin
, cout
; // byte counts
303 uint32_t cin_wrap
, cout_wrap
; // byte counter wrap count (RADIUS accounting giagawords)
304 uint32_t cin_delta
, cout_delta
; // byte count changes (for dump_session())
305 uint16_t throttle_in
; // upstream throttle rate (kbps)
306 uint16_t throttle_out
; // downstream throttle rate
307 uint8_t filter_in
; // input filter index (to ip_filters[N-1]; 0 if none)
308 uint8_t filter_out
; // output filter index
309 uint16_t snoop_port
; // Interception destination port
310 in_addr_t snoop_ip
; // Interception destination IP
311 clockt opened
; // when started
312 clockt die
; // being closed, when to finally free
313 uint32_t session_timeout
; // Maximum session time in seconds
314 uint32_t idle_timeout
; // Maximum idle time in seconds
315 time_t last_packet
; // Last packet from the user (used for idle timeouts)
316 time_t last_data
; // Last data packet to/from the user (used for idle timeouts)
317 in_addr_t dns1
, dns2
; // DNS servers
318 routet route
[MAXROUTE
]; // static routes
319 uint16_t tbf_in
; // filter bucket for throttling in from the user.
320 uint16_t tbf_out
; // filter bucket for throttling out to the user.
321 int random_vector_length
;
322 uint8_t random_vector
[MAXTEL
];
323 char user
[MAXUSER
]; // user (needed in session for radius stop messages)
324 char called
[MAXTEL
]; // called number
325 char calling
[MAXTEL
]; // calling number
326 uint32_t tx_connect_speed
;
327 uint32_t rx_connect_speed
;
328 clockt timeout
; // Session timeout
329 uint32_t mrru
; // Multilink Max-Receive-Reconstructed-Unit
330 epdist epdis
; // Multilink Endpoint Discriminator
331 bundleidt bundle
; // Multilink Bundle Identifier
332 uint8_t mssf
; // Multilink Short Sequence Number Header Format
333 uint8_t walled_garden
; // is this session gardened?
334 uint8_t classlen
; // class (needed for radius accounting messages)
335 char class[MAXCLASS
];
336 uint8_t ipv6prefixlen
; // IPv6 route prefix length
337 struct in6_addr ipv6route
; // Static IPv6 route
338 sessionidt forwardtosession
; // LNS id_session to forward
339 uint8_t src_hwaddr
[ETH_ALEN
]; // MAC addr source (for pppoe sessions 6 bytes)
340 uint32_t dhcpv6_prefix_iaid
; // prefix iaid requested by client
341 uint32_t dhcpv6_iana_iaid
; // iaid of iana requested by client
342 struct in6_addr ipv6address
; // Framed Ipv6 address
343 struct dhcp6_opt_clientid dhcpv6_client_id
; // Size max (headers + DUID)
344 char reserved
[4]; // Space to expand structure without changing HB_VERSION
351 uint32_t prev_coutgrp
;
359 int state
; // current state (groupestate enum)
360 uint32_t time_changed
;
364 groupsesslistt sesslist
[MAXSESSINGRP
];
365 routet route
[MAXROUTEINGRP
]; // static routes
375 }; // Mapping from IP address to session structures.
379 int state
; // current state (bundlestate enum)
380 uint32_t seq_num_t
; // Sequence Number (transmission)
381 uint32_t timeout
; // Session-Timeout for bundle
382 uint32_t max_seq
; // Max value of sequence number field
383 uint8_t num_of_links
; // Number of links joint to this bundle
384 uint32_t online_time
; // The time this bundle is online
385 clockt last_check
; // Last time the timeout is checked
386 uint32_t mrru
; // Multilink Max-Receive-Reconstructed-Unit
387 uint8_t mssf
; // Multilink Short Sequence Number Header Format
388 epdist epdis
; // Multilink Endpoint Discriminator
389 char user
[MAXUSER
]; // Needed for matching member links
390 sessionidt current_ses
; // Current session to use for sending (used in RR load-balancing)
391 sessionidt members
[MAXBUNDLESES
]; // Array for member links sessions
397 fragmentt fragment
[MAXFRAGNUM
];
398 uint8_t reassembled_frame
[MAXETHER
]; // The reassembled frame
399 uint16_t re_frame_len
; // The reassembled frame length
400 uint16_t re_frame_begin_index
, re_frame_end_index
; // reassembled frame begin index, end index respectively
401 uint16_t start_index
, end_index
; // start and end sequence numbers available on the fragments array respectively
402 uint32_t M
; // Minumum frame sequence number received over all bundle members
403 uint32_t start_seq
; // Last received frame sequence number (bearing B bit)
407 #define AUTHPAP 1 // allow PAP
408 #define AUTHCHAP 2 // allow CHAP
420 // PPP restart timer/counters
425 } lcp
, ipcp
, ipv6cp
, ccp
;
427 // identifier for Protocol-Reject, Code-Reject
430 // authentication to use
442 // our Endpoint Discriminator
446 clockt last_packet_out
;
447 uint32_t packets_out
;
448 uint32_t packets_dropped
;
450 // RADIUS session in use
459 // Last Multilink frame sequence number received
462 // jitter average of the session
464 // time in milliseconds of the last fragment.
469 #define SESSION_PFC (1 << 0) // use Protocol-Field-Compression
470 #define SESSION_ACFC (1 << 1) // use Address-and-Control-Field-Compression
471 #define SESSION_STARTED (1 << 2) // RADIUS Start record sent
473 // 328 bytes per tunnel
476 tunnelidt far
; // far end tunnel ID
477 in_addr_t ip
; // Ip for far end
478 uint16_t port
; // port for far end
479 uint16_t window
; // Rx window
480 uint16_t nr
; // next receive
481 uint16_t ns
; // next send
482 int state
; // current state (tunnelstate enum)
483 clockt last
; // when last control message sent (used for resend timeout)
484 clockt retry
; // when to try resending pending control
485 clockt die
; // being closed, when to finally free
486 clockt lastrec
; // when the last control message was received
487 char hostname
[128]; // tunnel hostname
488 char vendor
[128]; // LAC vendor
489 uint8_t try; // number of retrys on a control message
490 uint16_t controlc
; // outstaind messages in queue
491 controlt
*controls
; // oldest message
492 controlt
*controle
; // newest message
493 uint16_t isremotelns
; // != 0 if the tunnel is to remote LNS (== index on the conf remote lns)
494 uint16_t indexudp
; // Index UDP file handle (in udpfd[])
495 char reserved
[12]; // Space to expand structure without changing HB_VERSION
499 // 164 bytes per radius session
500 typedef struct // outstanding RADIUS requests
502 sessionidt session
; // which session this applies to
503 hasht auth
; // request authenticator
504 clockt retry
; // when to try next
505 char pass
[129]; // password
506 uint8_t id
; // ID for PPP response
507 uint8_t try; // which try we are on
508 uint8_t state
; // state of radius requests
509 uint8_t chap
; // set if CHAP used (is CHAP identifier)
510 uint8_t term_cause
; // Stop record: Acct-Terminate-Cause
511 char const *term_msg
; // terminate reason
517 in_addr_t address
; // Host byte order..
518 char assigned
; // 1 if assigned, 0 if free
520 clockt last
; // last used
521 char user
[129]; // user (try to have ip addresses persistent)
532 char message
[MAX_LOG_LENGTH
];
533 } buffer
[RINGBUFFER_SIZE
];
540 * Possible tunnel states
541 * TUNNELFREE -> TUNNELOPEN -> TUNNELDIE -> TUNNELFREE
545 TUNNELFREE
, // Not in use
546 TUNNELOPEN
, // Active tunnel
547 TUNNELDIE
, // Currently closing
548 TUNNELOPENING
, // Busy opening
549 TUNNELUNDEF
, // Undefined
554 BUNDLEFREE
, // Not in use
555 BUNDLEOPEN
, // Active bundle
556 BUNDLEUNDEF
, // Undefined
561 GROUPEFREE
, // Not in use
562 GROUPEOPEN
, // Active bundle
563 GROUPEUNDEF
// Undefined
568 NULLCLASS
= 0, //End Point Discriminator classes
578 RADIUSNULL
, // Not in use
579 RADIUSCHAP
, // sending CHAP down PPP
580 RADIUSAUTH
, // sending auth to RADIUS server
581 RADIUSSTART
, // sending start accounting to RADIUS server
582 RADIUSSTOP
, // sending stop accounting to RADIUS server
583 RADIUSINTERIM
, // sending interim accounting to RADIUS server
584 RADIUSWAIT
, // waiting timeout before available, in case delayed replies
585 RADIUSJUSTAUTH
, // sending auth to RADIUS server, just authentication, no ip assigning
593 uint32_t tun_rx_packets
;
594 uint32_t tun_tx_packets
;
595 uint32_t tun_rx_bytes
;
596 uint32_t tun_tx_bytes
;
597 uint32_t tun_rx_errors
;
598 uint32_t tun_tx_errors
;
599 uint32_t tun_rx_dropped
;
601 uint32_t tunnel_rx_packets
;
602 uint32_t tunnel_tx_packets
;
603 uint32_t tunnel_rx_bytes
;
604 uint32_t tunnel_tx_bytes
;
605 uint32_t tunnel_rx_errors
;
606 uint32_t tunnel_tx_errors
;
608 uint32_t tunnel_retries
;
609 uint32_t radius_retries
;
613 uint32_t packets_snooped
;
615 uint32_t tunnel_created
;
616 uint32_t session_created
;
617 uint32_t tunnel_timeout
;
618 uint32_t session_timeout
;
619 uint32_t radius_timeout
;
620 uint32_t radius_overflow
;
621 uint32_t tunnel_overflow
;
622 uint32_t session_overflow
;
624 uint32_t ip_allocated
;
627 uint32_t c_forwarded
;
628 uint32_t recv_forward
;
630 uint32_t select_called
;
631 uint32_t multi_read_used
;
632 uint32_t multi_read_exceeded
;
635 uint32_t call_processtun
;
636 uint32_t call_processipout
;
637 uint32_t call_processipv6out
;
638 uint32_t call_processudp
;
639 uint32_t call_sessionbyip
;
640 uint32_t call_sessionbyipv6
;
641 uint32_t call_sessionbyuser
;
642 uint32_t call_sendarp
;
643 uint32_t call_sendipcp
;
644 uint32_t call_sendipv6cp
;
645 uint32_t call_processipv6cp
;
646 uint32_t call_tunnelsend
;
647 uint32_t call_sessionkill
;
648 uint32_t call_sessionshutdown
;
649 uint32_t call_tunnelkill
;
650 uint32_t call_tunnelshutdown
;
651 uint32_t call_assign_ip_address
;
652 uint32_t call_free_ip_address
;
653 uint32_t call_dump_acct_info
;
654 uint32_t call_sessionsetup
;
655 uint32_t call_processpap
;
656 uint32_t call_processchap
;
657 uint32_t call_processlcp
;
658 uint32_t call_processipcp
;
659 uint32_t call_processipin
;
660 uint32_t call_processipv6in
;
661 uint32_t call_processccp
;
662 uint32_t call_sendchap
;
663 uint32_t call_processrad
;
664 uint32_t call_radiussend
;
665 uint32_t call_radiusretry
;
666 uint32_t call_random_data
;
667 uint32_t call_dhcpv6_process
;
674 #define CSTAT(x) STAT(call_ ## x)
679 #define STAT(x) (_statistics->x++)
680 #define INC_STAT(x,y) (_statistics->x += (y))
681 #define GET_STAT(x) (_statistics->x)
682 #define SET_STAT(x, y) (_statistics->x = (y))
686 #define INC_STAT(x,y)
687 #define GET_STAT(x) 0
688 #define SET_STAT(x, y)
697 int debug
; // debugging level
698 time_t start_time
; // time when l2tpns was started
699 char bandwidth
[256]; // current bandwidth
700 char pid_file
[256]; // file to write PID to on startup
702 clockt current_time
; // 1/10ths of a second since the process started.
703 // means that we can only run a given process
704 // for 13 years without re-starting!
706 char config_file
[128];
707 int reload_config
; // flag to re-read config (set by cli)
708 int multi_read_count
; // amount of packets to read per fd in processing loop
710 char tundevicename
[IFNAMSIZ
]; // tun device name
711 char log_filename
[128];
713 char l2tp_secret
[64]; // L2TP shared secret
714 int l2tp_mtu
; // MTU of interface used for L2TP
716 char random_device
[256]; // random device path, defaults to RANDOMDEVICE
718 int ppp_restart_time
; // timeout for PPP restart
719 int ppp_max_configure
; // max lcp configure requests to send
720 int ppp_max_failure
; // max lcp configure naks to send
722 char radiussecret
[64];
723 int radius_accounting
;
725 in_addr_t radiusserver
[MAXRADSERVER
]; // radius servers
726 uint16_t radiusport
[MAXRADSERVER
]; // radius base ports
727 uint8_t numradiusservers
; // radius server count
729 uint16_t radius_dae_port
; // port for radius DAE
730 uint16_t radius_bind_min
; // port range for udp sockets used to send/recv radius packets
731 uint16_t radius_bind_max
;
733 char radius_authtypes_s
[32]; // list of valid authentication types (chap, pap) in order of preference
734 int radius_authtypes
;
735 int radius_authprefer
;
737 int allow_duplicate_users
; // allow multiple logins with the same username
738 int kill_timedout_sessions
; // kill authenticated sessions with "session_timeout == 0"
740 in_addr_t default_dns1
, default_dns2
;
742 unsigned long rl_rate
; // default throttle rate
743 int num_tbfs
; // number of throttle buckets
745 char accounting_dir
[128];
746 int account_all_origin
; // Accouting all origin (LAC data + Remote LNS Data + PPPOE data)
747 in_addr_t bind_address
;
748 in_addr_t peer_address
;
749 int send_garp
; // Set to true to garp for vip address on startup
752 char plugins
[64][MAXPLUGINS
];
753 char old_plugins
[64][MAXPLUGINS
];
755 int next_tbf
; // Next HTB id available to use
756 int scheduler_fifo
; // If the system has multiple CPUs, use FIFO scheduling
757 // policy for this process.
758 int lock_pages
; // Lock pages into memory.
759 int icmp_rate
; // Max number of ICMP unreachable per second to send
760 int max_packets
; // DoS prevention: per session limit of packets/0.1s
761 char epdis_addr
[20]; // MP Endpoint Discriminator address
763 in_addr_t cluster_address
; // Multicast address of cluster.
764 // Send to this address to have everyone hear.
765 char cluster_interface
[64]; // Which interface to listen for multicast on.
766 int cluster_iam_master
; // Are we the cluster master???
767 int cluster_iam_uptodate
; // Set if we've got a full set of state from the master.
768 in_addr_t cluster_master_address
; // The network address of the cluster master.
769 // Zero if i am the cluster master.
770 int cluster_seq_number
; // Sequence number of the next heartbeat we'll send out
771 // (or the seq number we're next expecting if we're a slave).
772 int cluster_undefined_sessions
; // How many sessions we're yet to receive from the master.
773 int cluster_undefined_bundles
; // How many bundles we're yet to receive from the master.
774 int cluster_undefined_tunnels
; // How many tunnels we're yet to receive from the master.
775 int cluster_undefined_groupes
; // How many groupes we're yet to receive from the master.
776 int cluster_highest_sessionid
;
777 int cluster_highest_bundleid
;
778 int cluster_highest_groupeid
;
779 int cluster_highest_tunnelid
;
780 clockt cluster_last_hb
; // Last time we saw a heartbeat from the master.
781 int cluster_last_hb_ver
; // Heartbeat version last seen from master
782 int cluster_num_changes
; // Number of changes queued.
784 int cluster_mcast_ttl
; // TTL for multicast packets
785 int cluster_hb_interval
; // How often to send a heartbeat.
786 int cluster_hb_timeout
; // How many missed heartbeats trigger an election.
787 uint64_t cluster_table_version
; // # state changes processed by cluster
789 struct in6_addr ipv6_prefix
; // Our IPv6 network pool.
792 int cluster_master_min_adv
; // Master advertises routes while the number of up to date
793 // slaves is less than this value.
794 in_addr_t cli_bind_address
; // bind address for CLI
795 char hostname
[MAXHOSTNAME
]; // hostname (overridden by -h on command line)
797 char guest_user
[MAXUSER
]; // Guest account username
800 #define BGP_NUM_PEERS 2
807 struct in_addr update_source
;
808 } neighbour
[BGP_NUM_PEERS
];
809 in_addr_t nexthop_address
;
810 struct in6_addr nexthop6_address
;
813 int echo_timeout
; // Time between last packet sent and LCP ECHO generation
814 int idle_echo_timeout
; // Time between last packet seen and
815 // Drop sessions who have not responded within IDLE_ECHO_TIMEOUT seconds
816 in_addr_t iftun_address
;
817 int disable_lac_func
;
818 int auth_tunnel_change_addr_src
;
820 uint16_t bind_portremotelns
;
821 in_addr_t bind_address_remotelns
;
822 char pppoe_if_to_bind
[IFNAMSIZ
]; // Name pppoe interface to bind
823 char pppoe_service_name
[64]; // pppoe service name
824 char pppoe_ac_name
[64];
825 uint8_t pppoe_hwaddr
[ETH_ALEN
]; // MAC addr of interface pppoe to bind
826 int pppoe_only_equal_svc_name
; // Accept only PADI with service-name equal to server
827 int disable_sending_hello
; // Disable l2tp sending HELLO message for Apple compatibility.
828 int disable_no_spoof
; // Disable no spoof (permit load balancing client --> internet)
829 int nbudpfd
; // number UDP file handle
830 int nbmultiaddress
; // number multi address to bind
831 int indexlacudpfd
; // Index UDP LAC file handle (in udpfd[])
832 int nbmultihostname
; // number hostname, normally the same number as the nbudpfd
833 int grp_txrate_average_time
; // caculation txrate average time (default 10s)
834 int no_throttle_local_IP
; // no throttle traffic from session to session
835 in_addr_t bind_n_address
[MAX_BINDADDR
];
836 in_addr_t iftun_n_address
[MAX_BINDADDR
];
837 char bind_multi_address
[256];
838 char multi_hostname
[512];
839 char multi_n_hostname
[MAX_NBHOSTNAME
][MAXHOSTNAME
]; // list hostname
840 struct in6_addr default_ipv6_dns1
;
841 struct in6_addr default_ipv6_dns2
;
842 uint32_t dhcp6_preferred_lifetime
; // preferred lifetime (see rfc3315)
843 uint32_t dhcp6_valid_lifetime
; // valid lifetime (see rfc3315)
844 uint32_t dhcp6_server_duid
; // DUID of dhcpv6 server (see rfc3315)
845 char default_ipv6_domain_list
[255];
848 enum config_typet
{ INT
, STRING
, UNSIGNED_LONG
, SHORT
, BOOL
, IPv4
, IPv6
};
854 enum config_typet type
;
859 uint8_t op
; // operation
860 #define FILTER_PORT_OP_NONE 0 // all ports match
861 #define FILTER_PORT_OP_EQ 1
862 #define FILTER_PORT_OP_NEQ 2
863 #define FILTER_PORT_OP_GT 3
864 #define FILTER_PORT_OP_LT 4
865 #define FILTER_PORT_OP_RANGE 5
866 uint16_t port
; // port (host byte order)
867 uint16_t port2
; // range
872 int action
; // permit/deny
873 #define FILTER_ACTION_DENY 1
874 #define FILTER_ACTION_PERMIT 2
875 uint8_t proto
; // protocol: IPPROTO_* (netinet/in.h)
876 in_addr_t src_ip
; // source ip (network byte order)
878 ip_filter_portt src_ports
;
879 in_addr_t dst_ip
; // dest ip
881 ip_filter_portt dst_ports
;
882 uint8_t frag
; // apply to non-initial fragments
883 uint8_t tcp_flag_op
; // match type: any, all, established
884 #define FILTER_FLAG_OP_ANY 1
885 #define FILTER_FLAG_OP_ALL 2
886 #define FILTER_FLAG_OP_EST 3
887 uint8_t tcp_sflags
; // flags set
888 uint8_t tcp_cflags
; // flags clear
889 uint32_t counter
; // match count
892 #define TCP_FLAG_FIN 0x01
893 #define TCP_FLAG_SYN 0x02
894 #define TCP_FLAG_RST 0x04
895 #define TCP_FLAG_PSH 0x08
896 #define TCP_FLAG_ACK 0x10
897 #define TCP_FLAG_URG 0x20
900 #define MAXFILTER_RULES 32
903 char name
[32]; // ACL name
904 int extended
; // type: 0 = standard, 1 = extended
905 ip_filter_rulet rules
[MAXFILTER_RULES
];
906 int used
; // session ref count
909 // CDN result/error codes
910 #define CDN_NONE 0, 0
911 #define CDN_TRY_ANOTHER 2, 7
912 #define CDN_ADMIN_DISC 3, 0
913 #define CDN_UNAVAILABLE 4, 0
915 // RADIUS Acct-Terminate-Cause values
916 #define TERM_USER_REQUEST 1
917 #define TERM_LOST_CARRIER 2
918 #define TERM_LOST_SERVICE 3
919 #define TERM_IDLE_TIMEOUT 4
920 #define TERM_SESSION_TIMEOUT 5
921 #define TERM_ADMIN_RESET 6
922 #define TERM_ADMIN_REBOOT 7
923 #define TERM_PORT_ERROR 8
924 #define TERM_NAS_ERROR 9
925 #define TERM_NAS_REQUEST 10
926 #define TERM_NAS_REBOOT 11
927 #define TERM_PORT_UNNEEDED 12
928 #define TERM_PORT_PREEMPTED 13
929 #define TERM_PORT_SUSPENDED 14
930 #define TERM_SERVICE_UNAVAILABLE 15
931 #define TERM_CALLBACK 16
932 #define TERM_USER_ERROR 17
933 #define TERM_HOST_REQUEST 18
934 #define TERM_SUPPLICANT_RESTART 19
935 #define TERM_REAUTHENTICATION_FAILURE 20
936 #define TERM_PORT_REINIT 21
937 #define TERM_PORT_DISABLED 22
939 // on slaves, alow BGP to withdraw cleanly before exiting
942 // quit actions (master)
943 #define QUIT_FAILOVER 1 // SIGTERM: exit when all control messages have been acked (for cluster failover)
944 #define QUIT_SHUTDOWN 2 // SIGQUIT: shutdown sessions/tunnels, reject new connections
947 void sendarp(int ifr_idx
, const unsigned char* mac
, in_addr_t ip
);
951 void processpap(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
952 void processchap(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
953 void lcp_open(sessionidt s
, tunnelidt t
);
954 void lcp_restart(sessionidt s
);
955 void processlcp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
956 void processipcp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
957 void processipv6cp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
958 void processipin(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
959 void processmpin(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
960 void processmpframe(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
, uint8_t extra
);
961 void processipv6in(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
962 void processccp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
963 void sendchap(sessionidt s
, tunnelidt t
);
964 uint8_t *makeppp(uint8_t *b
, int size
, uint8_t *p
, int l
, sessionidt s
, tunnelidt t
, uint16_t mtype
, uint8_t prio
, bundleidt bid
, uint8_t mp_bits
);
965 uint8_t *opt_makeppp(uint8_t *p
, int l
, sessionidt s
, tunnelidt t
, uint16_t mtype
, uint8_t prio
, bundleidt bid
, uint8_t mp_bits
);
966 void sendlcp(sessionidt s
, tunnelidt t
);
967 void send_ipin(sessionidt s
, uint8_t *buf
, int len
);
968 void sendccp(sessionidt s
, tunnelidt t
);
969 void protoreject(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
, uint16_t proto
);
970 int join_bundle(sessionidt s
);
975 void radiussend(uint16_t r
, uint8_t state
);
976 void processrad(uint8_t *buf
, int len
, char socket_index
);
977 void radiusretry(uint16_t r
);
978 uint16_t radiusnew(sessionidt s
);
979 void radiusclear(uint16_t r
, sessionidt s
);
980 void processdae(uint8_t *buf
, int len
, struct sockaddr_in
*addr
, int alen
, struct in_addr
*local
);
981 int rad_tunnel_pwdecode(uint8_t *pl2tpsecret
, size_t *pl2tpsecretlen
, const char *radiussecret
, const uint8_t * auth
);
984 clockt
backoff(uint8_t try);
985 void send_ipv6_ra(sessionidt s
, tunnelidt t
, struct in6_addr
*ip
);
986 void route6set(sessionidt s
, struct in6_addr ip
, int prefixlen
, int add
);
987 sessionidt
sessionbyip(in_addr_t ip
);
988 sessionidt
sessionbyipv6(struct in6_addr ip
);
989 sessionidt
sessionbyuser(char *username
);
990 void increment_counter(uint32_t *counter
, uint32_t *wrap
, uint32_t delta
);
991 void random_data(uint8_t *buf
, int len
);
992 void sessionkill(sessionidt s
, char *reason
);
993 void sessionshutdown(sessionidt s
, char const *reason
, int cdn_result
, int cdn_error
, int term_cause
);
994 void filter_session(sessionidt s
, int filter_in
, int filter_out
);
995 void send_garp(in_addr_t ip
);
996 void tunnelsend(uint8_t *buf
, uint16_t l
, tunnelidt t
);
997 int tun_write(uint8_t *data
, int size
);
998 void adjust_tcp_mss(sessionidt s
, tunnelidt t
, uint8_t *buf
, int len
, uint8_t *tcp
);
999 void sendipcp(sessionidt s
, tunnelidt t
);
1000 void sendipv6cp(sessionidt s
, tunnelidt t
);
1001 void processudp(uint8_t *buf
, int len
, struct sockaddr_in
*addr
, uint16_t indexudpfd
);
1002 void processipout(uint8_t *buf
, int len
);
1003 void snoop_send_packet(uint8_t *packet
, uint16_t size
, in_addr_t destination
, uint16_t port
);
1004 int find_filter(char const *name
, size_t len
);
1005 int ip_filter(uint8_t *buf
, int len
, uint8_t filter
);
1006 int cmd_show_ipcache(struct cli_def
*cli
, const char *command
, char **argv
, int argc
);
1007 int cmd_show_hist_idle(struct cli_def
*cli
, const char *command
, char **argv
, int argc
);
1008 int cmd_show_hist_open(struct cli_def
*cli
, const char *command
, char **argv
, int argc
);
1009 void netlink_addattr(struct nlmsghdr
*nh
, int type
, const void *data
, int alen
);
1010 ssize_t
netlink_send(struct nlmsghdr
*nh
);
1011 void cache_ipmap(in_addr_t ip
, sessionidt s
);
1012 tunnelidt
lac_new_tunnel();
1013 void lac_tunnelclear(tunnelidt t
);
1014 void lac_send_SCCRQ(tunnelidt t
, uint8_t * auth
, unsigned int auth_len
);
1015 void lac_send_ICRQ(tunnelidt t
, sessionidt s
);
1016 void lac_tunnelshutdown(tunnelidt t
, char *reason
, int result
, int error
, char *msg
);
1019 sessionidt
grp_getnextsession(groupidt g
, in_addr_t ip
, in_addr_t ip_src
);
1020 void grp_initdata(void);
1021 void grp_processvendorspecific(sessionidt s
, uint8_t *pvs
);
1022 groupidt
grp_groupbysession(sessionidt s
);
1023 groupidt
grp_groupbyip(in_addr_t ip
);
1024 void grp_setgrouproute(groupidt g
, int add
);
1025 void grp_time_changed(void);
1026 void grp_removesession(groupidt g
, sessionidt s
);
1027 int grp_cluster_load_groupe(groupidt g
, groupsesst
*new);
1031 #define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
1032 #define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); })
1034 void _log(int level
, sessionidt s
, tunnelidt t
, const char *format
, ...) __attribute__((format (printf
, 4, 5)));
1035 void _log_hex(int level
, const char *title
, const uint8_t *data
, int maxsize
);
1038 int sessionsetup(sessionidt s
, tunnelidt t
);
1039 int run_plugins(int plugin_type
, void *data
);
1040 void rebuild_address_pool(void);
1041 void throttle_session(sessionidt s
, int rate_in
, int rate_out
);
1042 int load_session(sessionidt
, sessiont
*);
1043 void become_master(void); // We're the master; kick off any required master initializations.
1048 void cli_init_complete(char *hostname
);
1049 void cli_do_file(FILE *fh
);
1050 void cli_do(int sockfd
);
1051 int cli_arg_help(struct cli_def
*cli
, int cr_ok
, char *entry
, ...);
1055 void host_unreachable(in_addr_t destination
, uint16_t id
, in_addr_t source
, uint8_t *packet
, int packet_len
);
1058 extern tunnelt
*tunnel
;
1059 extern bundlet
*bundle
;
1060 extern sessiont
*session
;
1061 extern sessionlocalt
*sess_local
;
1062 extern ippoolt
*ip_address_pool
;
1063 extern groupsesst
*grpsession
;
1064 extern groupidt gnextgrpid
;
1065 #define sessionfree (session[0].next)
1068 extern configt
*config
;
1069 extern time_t basetime
; // Time when this process started.
1070 extern time_t time_now
; // Seconds since EPOCH.
1071 extern char main_quit
;
1072 extern uint32_t last_id
;
1073 extern struct Tstats
*_statistics
;
1074 extern in_addr_t my_address
;
1077 extern int tunidx
; // ifr_ifindex of tun device
1078 extern union iphash ip_hash
[256];
1094 int index
; // for RADIUS, BGP, UDP
1097 #define TIME (config->current_time)
1099 extern uint16_t MRU
;
1100 extern uint16_t MSS
;
1102 // macros for handling help in cli commands
1103 #define CLI_HELP_REQUESTED (argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?')
1104 #define CLI_HELP_NO_ARGS (argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL)
1106 #endif /* __L2TPNS_H__ */