2 // $Id: l2tpns.h,v 1.116 2006/04/27 14:37:28 bodea Exp $
7 #include <netinet/in.h>
11 #include <netinet/in.h>
12 #include <sys/socket.h>
13 #include <arpa/inet.h>
14 #include <sys/types.h>
17 #define VERSION "2.2.0"
20 #define MAXTUNNEL 500 // could be up to 65535
21 #define MAXBUNDLE 300 // could be up to 65535
22 #define MAXBUNDLESES 10 // Maximum number of member links in bundle
23 #define MAXADDRESS 20 // Maximum length for the Endpoint Discrminiator address
24 #define MAXFRAGNUM 1500 // Maximum number of Multilink fragment in a bundle
25 #define MAXFRAGLEN 1000 // Maximum length for Multilink fragment
26 #define MAXSESSION 60000 // could be up to 65535
27 #define MAXTBFS 6000 // Maximum token bucket filters. Might need up to 2 * session.
29 #define RADIUS_SHIFT 6
30 #define RADIUS_FDS (1 << RADIUS_SHIFT)
31 #define RADIUS_MASK ((1 << RADIUS_SHIFT) - 1)
32 #define MAXRADIUS (1 << (8 + RADIUS_SHIFT))
34 #define T_UNDEF (0xffff) // A tunnel ID that won't ever be used. Mark session as undefined.
35 #define T_FREE (0) // A tunnel ID that won't ever be used. Mark session as free.
37 #define MAXCONTROL 1000 // max length control message we ever send...
38 #define MINMTU 576 // minimum recommended MTU (rfc1063)
39 #define MAXMTU 2600 // arbitrary maximum MTU
40 #define PPPoE_MRU 1492 // maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2))
41 #define MAXETHER (MAXMTU+18) // max packet we try sending to tun
42 #define MAXTEL 96 // telephone number
43 #define MAXUSER 128 // username
44 #define MAXPASS 128 // password
45 #define MAXPLUGINS 20 // maximum number of plugins to load
46 #define MAXRADSERVER 10 // max radius servers
47 #define MAXROUTE 10 // max static routes per session
48 #define MAXIPPOOL 131072 // max number of ip addresses in pool
49 #define RINGBUFFER_SIZE 10000 // Number of ringbuffer entries to allocate
50 #define MAX_LOG_LENGTH 512 // Maximum size of log message
51 #define ECHO_TIMEOUT 10 // Time between last packet sent and LCP ECHO generation
52 #define IDLE_TIMEOUT 240 // Time between last packet sent and LCP ECHO generation
53 #define BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
55 #define MP_BEGIN 0x80 // This value is used when (b)egin bit is set in MP header
56 #define MP_END 0x40 // This value is used when (e)nd bit is set in MP header
57 #define MP_BOTH_BITS 0xC0 // This value is used when both bits (begin and end) are set in MP header
59 #define DEFAULT_EPDIS_ADDRESS "L2TPNetServer" // Company name may goes here!
63 #define ETCDIR "/etc/l2tpns"
67 #define LIBDIR "/usr/lib/l2tpns"
71 #define PLUGINDIR LIBDIR // Plugins
75 #define PLUGINCONF ETCDIR // Plugin config dir
79 #define FLASHDIR ETCDIR
82 #define TUNDEVICE "/dev/net/tun"
83 #define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking
84 #define CONFIGFILE FLASHDIR "/startup-config" // Configuration file
85 #define CLIUSERS FLASHDIR "/users" // CLI Users file
86 #define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration
87 #define ACCT_TIME 3000 // 5 minute accounting interval
88 #define ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions
89 #define L2TPPORT 1701 // L2TP port
90 #define RADPORT 1645 // old radius port...
91 #define DAEPORT 3799 // DAE port
92 #define PKTARP 0x0806 // ARP packet type
93 #define PKTIP 0x0800 // IPv4 packet type
94 #define PKTIPV6 0x86DD // IPv6 packet type
96 #define PPPCHAP 0xC223
98 #define PPPIPCP 0x8021
99 #define PPPIPV6CP 0x8057
100 #define PPPCCP 0x80FD
102 #define PPPIPV6 0x0057
104 #define MIN_IP_SIZE 0x19
127 AccessChallenge
= 11,
128 DisconnectRequest
= 40,
159 // reset state machine counters
160 #define initialise_restart_count(_s, _fsm) \
161 sess_local[_s]._fsm.conf_sent = \
162 sess_local[_s]._fsm.nak_sent = 0
165 #define zero_restart_count(_s, _fsm) ({ \
166 sess_local[_s]._fsm.conf_sent = \
167 config->ppp_max_configure; \
168 sess_local[_s]._fsm.restart = \
169 time_now + config->ppp_restart_time; \
172 // increment ConfReq counter and reset timer
173 #define restart_timer(_s, _fsm) ({ \
174 sess_local[_s]._fsm.conf_sent++; \
175 sess_local[_s]._fsm.restart = \
176 time_now + config->ppp_restart_time; \
179 // stop timer on change to state where timer does not run
180 #define change_state(_s, _fsm, _new) ({ \
181 if (_new != session[_s].ppp._fsm) \
190 sess_local[_s]._fsm.restart = 0; \
191 initialise_restart_count(_s, _fsm); \
193 session[_s].ppp._fsm = _new; \
194 cluster_send_session(_s); \
199 typedef uint16_t sessionidt
;
200 typedef uint16_t bundleidt
;
201 typedef uint16_t tunnelidt
;
202 typedef uint32_t clockt
;
203 typedef uint8_t hasht
[16];
206 struct cli_session_actions
{
216 #define CLI_SESS_KILL 0x01
217 #define CLI_SESS_SNOOP 0x02
218 #define CLI_SESS_NOSNOOP 0x04
219 #define CLI_SESS_THROTTLE 0x08
220 #define CLI_SESS_NOTHROTTLE 0x10
221 #define CLI_SESS_FILTER 0x20
222 #define CLI_SESS_NOFILTER 0x40
224 struct cli_tunnel_actions
{
228 #define CLI_TUN_KILL 0x01
231 typedef struct // route
238 typedef struct controls
// control message
240 struct controls
*next
; // next in queue
241 uint16_t length
; // length
242 uint8_t buf
[MAXCONTROL
];
247 uint8_t length
; // Endpoint Discriminator length
248 uint8_t addr_class
; // Endpoint Discriminator class
249 uint8_t address
[MAXADDRESS
]; // Endpoint Discriminator address
253 uint16_t length
; // Fragment length
254 uint8_t data
[MAXFRAGLEN
]; // Fragment data
259 sessionidt next
; // next session in linked list
260 sessionidt far
; // far end session ID
261 tunnelidt tunnel
; // near end tunnel ID
262 uint8_t flags
; // session flags: see SESSION_*
264 uint8_t phase
; // PPP phase
265 uint8_t lcp
:4; // LCP state
266 uint8_t ipcp
:4; // IPCP state
267 uint8_t ipv6cp
:4; // IPV6CP state
268 uint8_t ccp
:4; // CCP state
270 char reserved_1
[2]; // unused: padding
271 in_addr_t ip
; // IP of session set by RADIUS response (host byte order).
272 int ip_pool_index
; // index to IP pool
273 uint32_t unique_id
; // unique session id
274 char reserved_2
[4]; // unused: was ns/nr
275 uint32_t magic
; // ppp magic number
276 uint32_t pin
, pout
; // packet counts
277 uint32_t cin
, cout
; // byte counts
278 uint32_t cin_wrap
, cout_wrap
; // byte counter wrap count (RADIUS accounting giagawords)
279 uint32_t cin_delta
, cout_delta
; // byte count changes (for dump_session())
280 uint16_t throttle_in
; // upstream throttle rate (kbps)
281 uint16_t throttle_out
; // downstream throttle rate
282 uint8_t filter_in
; // input filter index (to ip_filters[N-1]; 0 if none)
283 uint8_t filter_out
; // output filter index
284 uint16_t mru
; // maximum receive unit
285 clockt opened
; // when started
286 clockt die
; // being closed, when to finally free
287 time_t last_packet
; // Last packet from the user (used for idle timeouts)
288 in_addr_t dns1
, dns2
; // DNS servers
289 routet route
[MAXROUTE
]; // static routes
290 uint16_t tbf_in
; // filter bucket for throttling in from the user.
291 uint16_t tbf_out
; // filter bucket for throttling out to the user.
292 int random_vector_length
;
293 uint8_t random_vector
[MAXTEL
];
294 char user
[MAXUSER
]; // user (needed in seesion for radius stop messages)
295 char called
[MAXTEL
]; // called number
296 char calling
[MAXTEL
]; // calling number
297 uint32_t tx_connect_speed
;
298 uint32_t rx_connect_speed
;
299 clockt timeout
; // Session timeout
300 uint32_t mrru
; // Multilink Max-Receive-Reconstructed-Unit
301 uint8_t mssf
; // Multilink Short Sequence Number Header Format
302 epdist epdis
; // Multilink Endpoint Discriminator
303 bundleidt bundle
; // Multilink Bundle Identifier
304 in_addr_t snoop_ip
; // Interception destination IP
305 uint16_t snoop_port
; // Interception destination port
306 uint8_t walled_garden
; // is this session gardened?
307 uint8_t ipv6prefixlen
; // IPv6 route prefix length
308 struct in6_addr ipv6route
; // Static IPv6 route
309 char reserved_3
[11]; // Space to expand structure without changing HB_VERSION
315 int state
; // current state (bundlestate enum)
316 uint32_t seq_num_t
; // Sequence Number (transmission)
317 uint32_t seq_num_m
; // Last received frame sequence number (bearing B bit)
318 uint32_t offset
; // Offset between sequence number and array index
319 uint8_t pending_frag
; // Indicate that there is pending fragments to reassemble
320 uint8_t num_of_links
; // Number of links joint to this bundle
321 uint32_t online_time
; // The time this bundle is online
322 clockt last_check
; // Last time the timeout is checked
323 uint32_t mrru
; // Multilink Max-Receive-Reconstructed-Unit
324 uint8_t mssf
; // Multilink Short Sequence Number Header Format
325 epdist epdis
; // Multilink Endpoint Discriminator
326 char user
[MAXUSER
]; // Needed for matching member links
327 sessionidt current_ses
; // Current session to use for sending (used in RR load-balancing)
328 sessionidt members
[MAXBUNDLESES
]; // Array for member links sessions
334 fragmentt fragment
[MAXFRAGNUM
];
335 uint8_t reassembled_frame
[MAXETHER
]; // The reassembled frame
336 uint16_t re_frame_len
; // The reassembled frame length
340 #define AUTHPAP 1 // allow PAP
341 #define AUTHCHAP 2 // allow CHAP
353 // PPP restart timer/counters
358 } lcp
, ipcp
, ipv6cp
, ccp
;
360 // identifier for Protocol-Reject, Code-Reject
363 // authentication to use
375 // our Endpoint Discriminator
379 clockt last_packet_out
;
380 uint32_t packets_out
;
381 uint32_t packets_dropped
;
383 // RADIUS session in use
394 #define SESSION_PFC (1 << 0) // use Protocol-Field-Compression
395 #define SESSION_ACFC (1 << 1) // use Address-and-Control-Field-Compression
396 #define SESSION_STARTED (1 << 2) // RADIUS Start record sent
398 // 168 bytes per tunnel
401 tunnelidt far
; // far end tunnel ID
402 in_addr_t ip
; // Ip for far end
403 uint16_t port
; // port for far end
404 uint16_t window
; // Rx window
405 uint16_t nr
; // next receive
406 uint16_t ns
; // next send
407 int state
; // current state (tunnelstate enum)
408 clockt last
; // when last control message sent (used for resend timeout)
409 clockt retry
; // when to try resending pending control
410 clockt die
; // being closed, when to finally free
411 clockt lastrec
; // when the last control message was received
412 char hostname
[128]; // tunnel hostname
413 char vendor
[128]; // LAC vendor
414 uint8_t try; // number of retrys on a control message
415 uint16_t controlc
; // outstaind messages in queue
416 controlt
*controls
; // oldest message
417 controlt
*controle
; // newest message
421 // 164 bytes per radius session
422 typedef struct // outstanding RADIUS requests
424 sessionidt session
; // which session this applies to
425 hasht auth
; // request authenticator
426 clockt retry
; // when to try next
427 char pass
[129]; // password
428 uint8_t id
; // ID for PPP response
429 uint8_t try; // which try we are on
430 uint8_t state
; // state of radius requests
431 uint8_t chap
; // set if CHAP used (is CHAP identifier)
432 uint8_t term_cause
; // Stop record: Acct-Terminate-Cause
433 char const *term_msg
; // terminate reason
439 in_addr_t address
; // Host byte order..
440 char assigned
; // 1 if assigned, 0 if free
442 clockt last
; // last used
443 char user
[129]; // user (try to have ip addresses persistent)
454 char message
[MAX_LOG_LENGTH
];
455 } buffer
[RINGBUFFER_SIZE
];
462 * Possible tunnel states
463 * TUNNELFREE -> TUNNELOPEN -> TUNNELDIE -> TUNNELFREE
467 TUNNELFREE
, // Not in use
468 TUNNELOPEN
, // Active tunnel
469 TUNNELDIE
, // Currently closing
470 TUNNELOPENING
, // Busy opening
471 TUNNELUNDEF
, // Undefined
476 BUNDLEFREE
, // Not in use
477 BUNDLEOPEN
, // Active bundle
478 BUNDLEUNDEF
, // Undefined
483 NULLCLASS
= 0, //End Point Discriminator classes
493 RADIUSNULL
, // Not in use
494 RADIUSCHAP
, // sending CHAP down PPP
495 RADIUSAUTH
, // sending auth to RADIUS server
496 RADIUSSTART
, // sending start accounting to RADIUS server
497 RADIUSSTOP
, // sending stop accounting to RADIUS server
498 RADIUSINTERIM
, // sending interim accounting to RADIUS server
499 RADIUSWAIT
, // waiting timeout before available, in case delayed replies
507 uint32_t tun_rx_packets
;
508 uint32_t tun_tx_packets
;
509 uint32_t tun_rx_bytes
;
510 uint32_t tun_tx_bytes
;
511 uint32_t tun_rx_errors
;
512 uint32_t tun_tx_errors
;
513 uint32_t tun_rx_dropped
;
515 uint32_t tunnel_rx_packets
;
516 uint32_t tunnel_tx_packets
;
517 uint32_t tunnel_rx_bytes
;
518 uint32_t tunnel_tx_bytes
;
519 uint32_t tunnel_rx_errors
;
520 uint32_t tunnel_tx_errors
;
522 uint32_t tunnel_retries
;
523 uint32_t radius_retries
;
527 uint32_t packets_snooped
;
529 uint32_t tunnel_created
;
530 uint32_t session_created
;
531 uint32_t tunnel_timeout
;
532 uint32_t session_timeout
;
533 uint32_t radius_timeout
;
534 uint32_t radius_overflow
;
535 uint32_t tunnel_overflow
;
536 uint32_t session_overflow
;
538 uint32_t ip_allocated
;
541 uint32_t c_forwarded
;
542 uint32_t recv_forward
;
544 uint32_t select_called
;
545 uint32_t multi_read_used
;
546 uint32_t multi_read_exceeded
;
549 uint32_t call_processtun
;
550 uint32_t call_processipout
;
551 uint32_t call_processipv6out
;
552 uint32_t call_processudp
;
553 uint32_t call_sessionbyip
;
554 uint32_t call_sessionbyipv6
;
555 uint32_t call_sessionbyuser
;
556 uint32_t call_sendarp
;
557 uint32_t call_sendipcp
;
558 uint32_t call_sendipv6cp
;
559 uint32_t call_processipv6cp
;
560 uint32_t call_tunnelsend
;
561 uint32_t call_sessionkill
;
562 uint32_t call_sessionshutdown
;
563 uint32_t call_tunnelkill
;
564 uint32_t call_tunnelshutdown
;
565 uint32_t call_assign_ip_address
;
566 uint32_t call_free_ip_address
;
567 uint32_t call_dump_acct_info
;
568 uint32_t call_sessionsetup
;
569 uint32_t call_processpap
;
570 uint32_t call_processchap
;
571 uint32_t call_processlcp
;
572 uint32_t call_processipcp
;
573 uint32_t call_processipin
;
574 uint32_t call_processipv6in
;
575 uint32_t call_processccp
;
576 uint32_t call_sendchap
;
577 uint32_t call_processrad
;
578 uint32_t call_radiussend
;
579 uint32_t call_radiusretry
;
580 uint32_t call_random_data
;
587 #define CSTAT(x) STAT(call_ ## x)
592 #define STAT(x) (_statistics->x++)
593 #define INC_STAT(x,y) (_statistics->x += (y))
594 #define GET_STAT(x) (_statistics->x)
595 #define SET_STAT(x, y) (_statistics->x = (y))
599 #define INC_STAT(x,y)
600 #define GET_STAT(x) 0
601 #define SET_STAT(x, y)
606 int debug
; // debugging level
607 time_t start_time
; // time when l2tpns was started
608 char bandwidth
[256]; // current bandwidth
609 char pid_file
[256]; // file to write PID to on startup
611 clockt current_time
; // 1/10ths of a second since the process started.
612 // means that we can only run a given process
613 // for 13 years without re-starting!
615 char config_file
[128];
616 int reload_config
; // flag to re-read config (set by cli)
617 int multi_read_count
; // amount of packets to read per fd in processing loop
619 char tundevice
[10]; // tun device name
620 char log_filename
[128];
622 char l2tp_secret
[64]; // L2TP shared secret
623 int l2tp_mtu
; // MTU of interface used for L2TP
625 char random_device
[256]; // random device path, defaults to RANDOMDEVICE
627 int ppp_restart_time
; // timeout for PPP restart
628 int ppp_max_configure
; // max lcp configure requests to send
629 int ppp_max_failure
; // max lcp configure naks to send
631 char radiussecret
[64];
632 int radius_accounting
;
634 in_addr_t radiusserver
[MAXRADSERVER
]; // radius servers
635 uint16_t radiusport
[MAXRADSERVER
]; // radius base ports
636 uint8_t numradiusservers
; // radius server count
638 uint16_t radius_dae_port
; // local port for radius dae
640 char radius_authtypes_s
[32]; // list of valid authentication types (chap, pap) in order of preference
641 int radius_authtypes
;
642 int radius_authprefer
;
644 int allow_duplicate_users
; // allow multiple logins with the same username
645 char guest_user
[MAXUSER
]; // allow multiple logins to guest account username
647 in_addr_t default_dns1
, default_dns2
;
649 unsigned long rl_rate
; // default throttle rate
650 int num_tbfs
; // number of throttle buckets
652 char accounting_dir
[128];
653 in_addr_t bind_address
;
654 in_addr_t peer_address
;
655 int send_garp
; // Set to true to garp for vip address on startup
658 char plugins
[64][MAXPLUGINS
];
659 char old_plugins
[64][MAXPLUGINS
];
661 int next_tbf
; // Next HTB id available to use
662 int scheduler_fifo
; // If the system has multiple CPUs, use FIFO scheduling
663 // policy for this process.
664 int lock_pages
; // Lock pages into memory.
665 int icmp_rate
; // Max number of ICMP unreachable per second to send
666 int max_packets
; // DoS prevention: per session limit of packets/0.1s
667 char epdis_addr
[20]; // MP Endpoint Discriminator address
669 in_addr_t cluster_address
; // Multicast address of cluster.
670 // Send to this address to have everyone hear.
671 char cluster_interface
[64]; // Which interface to listen for multicast on.
672 int cluster_iam_master
; // Are we the cluster master???
673 int cluster_iam_uptodate
; // Set if we've got a full set of state from the master.
674 in_addr_t cluster_master_address
; // The network address of the cluster master.
675 // Zero if i am the cluster master.
676 int cluster_seq_number
; // Sequence number of the next heartbeat we'll send out
677 // (or the seq number we're next expecting if we're a slave).
678 int cluster_undefined_sessions
; // How many sessions we're yet to receive from the master.
679 int cluster_undefined_bundles
; // How many bundles we're yet to receive from the master.
680 int cluster_undefined_tunnels
; // How many tunnels we're yet to receive from the master.
681 int cluster_highest_sessionid
;
682 int cluster_highest_bundleid
;
683 int cluster_highest_tunnelid
;
684 clockt cluster_last_hb
; // Last time we saw a heartbeat from the master.
685 int cluster_last_hb_ver
; // Heartbeat version last seen from master
686 int cluster_num_changes
; // Number of changes queued.
688 int cluster_mcast_ttl
; // TTL for multicast packets
689 int cluster_hb_interval
; // How often to send a heartbeat.
690 int cluster_hb_timeout
; // How many missed heartbeats trigger an election.
691 uint64_t cluster_table_version
; // # state changes processed by cluster
692 int cluster_master_min_adv
; // Master advertises routes while the number of up to date
693 // slaves is less than this value.
695 struct in6_addr ipv6_prefix
; // Our IPv6 network pool.
698 #define BGP_NUM_PEERS 2
705 } neighbour
[BGP_NUM_PEERS
];
709 enum config_typet
{ INT
, STRING
, UNSIGNED_LONG
, SHORT
, BOOL
, IPv4
, IPv6
};
715 enum config_typet type
;
720 uint8_t op
; // operation
721 #define FILTER_PORT_OP_NONE 0 // all ports match
722 #define FILTER_PORT_OP_EQ 1
723 #define FILTER_PORT_OP_NEQ 2
724 #define FILTER_PORT_OP_GT 3
725 #define FILTER_PORT_OP_LT 4
726 #define FILTER_PORT_OP_RANGE 5
727 uint16_t port
; // port (host byte order)
728 uint16_t port2
; // range
733 int action
; // permit/deny
734 #define FILTER_ACTION_DENY 1
735 #define FILTER_ACTION_PERMIT 2
736 uint8_t proto
; // protocol: IPPROTO_* (netinet/in.h)
737 in_addr_t src_ip
; // source ip (network byte order)
739 ip_filter_portt src_ports
;
740 in_addr_t dst_ip
; // dest ip
742 ip_filter_portt dst_ports
;
743 uint8_t frag
; // apply to non-initial fragments
744 uint8_t tcp_flag_op
; // match type: any, all, established
745 #define FILTER_FLAG_OP_ANY 1
746 #define FILTER_FLAG_OP_ALL 2
747 #define FILTER_FLAG_OP_EST 3
748 uint8_t tcp_sflags
; // flags set
749 uint8_t tcp_cflags
; // flags clear
750 uint32_t counter
; // match count
753 #define TCP_FLAG_FIN 0x01
754 #define TCP_FLAG_SYN 0x02
755 #define TCP_FLAG_RST 0x04
756 #define TCP_FLAG_PSH 0x08
757 #define TCP_FLAG_ACK 0x10
758 #define TCP_FLAG_URG 0x20
761 #define MAXFILTER_RULES 32
764 char name
[32]; // ACL name
765 int extended
; // type: 0 = standard, 1 = extended
766 ip_filter_rulet rules
[MAXFILTER_RULES
];
767 int used
; // session ref count
770 // CDN result/error codes
771 #define CDN_NONE 0, 0
772 #define CDN_TRY_ANOTHER 2, 7
773 #define CDN_ADMIN_DISC 3, 0
774 #define CDN_UNAVAILABLE 4, 0
776 // RADIUS Acct-Terminate-Cause values
777 #define TERM_USER_REQUEST 1
778 #define TERM_LOST_CARRIER 2
779 #define TERM_LOST_SERVICE 3
780 #define TERM_IDLE_TIMEOUT 4
781 #define TERM_SESSION_TIMEOUT 5
782 #define TERM_ADMIN_RESET 6
783 #define TERM_ADMIN_REBOOT 7
784 #define TERM_PORT_ERROR 8
785 #define TERM_NAS_ERROR 9
786 #define TERM_NAS_REQUEST 10
787 #define TERM_NAS_REBOOT 11
788 #define TERM_PORT_UNNEEDED 12
789 #define TERM_PORT_PREEMPTED 13
790 #define TERM_PORT_SUSPENDED 14
791 #define TERM_SERVICE_UNAVAILABLE 15
792 #define TERM_CALLBACK 16
793 #define TERM_USER_ERROR 17
794 #define TERM_HOST_REQUEST 18
795 #define TERM_SUPPLICANT_RESTART 19
796 #define TERM_REAUTHENTICATION_FAILURE 20
797 #define TERM_PORT_REINIT 21
798 #define TERM_PORT_DISABLED 22
801 void sendarp(int ifr_idx
, const unsigned char* mac
, in_addr_t ip
);
805 void processpap(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
806 void processchap(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
807 void lcp_open(sessionidt s
, tunnelidt t
);
808 void processlcp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
809 void processipcp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
810 void processipv6cp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
811 void processipin(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
812 void processmpin(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
813 void processmpframe(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
, uint8_t extra
);
814 void processipv6in(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
815 void processccp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
816 void sendchap(sessionidt s
, tunnelidt t
);
817 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
);
818 void sendlcp(sessionidt s
, tunnelidt t
);
819 void send_ipin(sessionidt s
, uint8_t *buf
, int len
);
820 void sendccp(sessionidt s
, tunnelidt t
);
821 void protoreject(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
, uint16_t proto
);
822 int join_bundle(sessionidt s
);
827 void radiussend(uint16_t r
, uint8_t state
);
828 void processrad(uint8_t *buf
, int len
, char socket_index
);
829 void radiusretry(uint16_t r
);
830 uint16_t radiusnew(sessionidt s
);
831 void radiusclear(uint16_t r
, sessionidt s
);
832 void processdae(uint8_t *buf
, int len
, struct sockaddr_in
*addr
, int alen
, struct in_addr
*local
);
836 clockt
backoff(uint8_t try);
837 void send_ipv6_ra(sessionidt s
, tunnelidt t
, struct in6_addr
*ip
);
838 void route6set(sessionidt s
, struct in6_addr ip
, int prefixlen
, int add
);
839 sessionidt
sessionbyip(in_addr_t ip
);
840 sessionidt
sessionbyipv6(struct in6_addr ip
);
841 sessionidt
sessionbyuser(char *username
);
842 void increment_counter(uint32_t *counter
, uint32_t *wrap
, uint32_t delta
);
843 void random_data(uint8_t *buf
, int len
);
844 void sessionkill(sessionidt s
, char *reason
);
845 void sessionshutdown(sessionidt s
, char const *reason
, int cdn_result
, int cdn_error
, int term_cause
);
846 void filter_session(sessionidt s
, int filter_in
, int filter_out
);
847 void send_garp(in_addr_t ip
);
848 void tunnelsend(uint8_t *buf
, uint16_t l
, tunnelidt t
);
849 int tun_write(uint8_t *data
, int size
);
850 void adjust_tcp_mss(sessionidt s
, tunnelidt t
, uint8_t *buf
, int len
, uint8_t *tcp
);
851 void sendipcp(sessionidt s
, tunnelidt t
);
852 void sendipv6cp(sessionidt s
, tunnelidt t
);
853 void processudp(uint8_t *buf
, int len
, struct sockaddr_in
*addr
);
854 void snoop_send_packet(uint8_t *packet
, uint16_t size
, in_addr_t destination
, uint16_t port
);
855 int find_filter(char const *name
, size_t len
);
856 int ip_filter(uint8_t *buf
, int len
, uint8_t filter
);
857 int cmd_show_ipcache(struct cli_def
*cli
, char *command
, char **argv
, int argc
);
858 int cmd_show_hist_idle(struct cli_def
*cli
, char *command
, char **argv
, int argc
);
859 int cmd_show_hist_open(struct cli_def
*cli
, char *command
, char **argv
, int argc
);
863 #define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
864 #define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); })
866 void _log(int level
, sessionidt s
, tunnelidt t
, const char *format
, ...) __attribute__((format (printf
, 4, 5)));
867 void _log_hex(int level
, const char *title
, const uint8_t *data
, int maxsize
);
870 int sessionsetup(sessionidt s
, tunnelidt t
);
871 int run_plugins(int plugin_type
, void *data
);
872 void rebuild_address_pool(void);
873 void throttle_session(sessionidt s
, int rate_in
, int rate_out
);
874 int load_session(sessionidt
, sessiont
*);
875 void become_master(void); // We're the master; kick off any required master initializations.
879 void init_cli(char *hostname
);
880 void cli_do_file(FILE *fh
);
881 void cli_do(int sockfd
);
882 int cli_arg_help(struct cli_def
*cli
, int cr_ok
, char *entry
, ...);
886 void host_unreachable(in_addr_t destination
, uint16_t id
, in_addr_t source
, uint8_t *packet
, int packet_len
);
889 extern tunnelt
*tunnel
;
890 extern bundlet
*bundle
;
891 extern sessiont
*session
;
892 extern sessionlocalt
*sess_local
;
893 extern ippoolt
*ip_address_pool
;
894 #define sessionfree (session[0].next)
897 extern configt
*config
;
898 extern time_t basetime
; // Time when this process started.
899 extern time_t time_now
; // Seconds since EPOCH.
900 extern char main_quit
;
901 extern uint32_t last_id
;
902 extern struct Tstats
*_statistics
;
903 extern in_addr_t my_address
;
918 int index
; // for RADIUS, BGP
921 #define TIME (config->current_time)
926 // macros for handling help in cli commands
927 #define CLI_HELP_REQUESTED (argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?')
928 #define CLI_HELP_NO_ARGS (argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL)
930 // CVS identifiers (for "show version file")
931 extern char const *cvs_id_arp
;
932 extern char const *cvs_id_cli
;
933 extern char const *cvs_id_cluster
;
934 extern char const *cvs_id_constants
;
935 extern char const *cvs_id_control
;
936 extern char const *cvs_id_icmp
;
937 extern char const *cvs_id_l2tpns
;
938 extern char const *cvs_id_ll
;
939 extern char const *cvs_id_md5
;
940 extern char const *cvs_id_ppp
;
941 extern char const *cvs_id_radius
;
942 extern char const *cvs_id_tbf
;
943 extern char const *cvs_id_util
;
945 #endif /* __L2TPNS_H__ */