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 <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 12 // Maximum number of member links in bundle
23 #define MAXADDRESS 20 // Maximum length for the Endpoint Discrminiator address
24 #define MAXSESSION 60000 // could be up to 65535
25 #define MAXTBFS 6000 // Maximum token bucket filters. Might need up to 2 * session.
27 #define RADIUS_SHIFT 6
28 #define RADIUS_FDS (1 << RADIUS_SHIFT)
29 #define RADIUS_MASK ((1 << RADIUS_SHIFT) - 1)
30 #define MAXRADIUS (1 << (8 + RADIUS_SHIFT))
32 #define T_UNDEF (0xffff) // A tunnel ID that won't ever be used. Mark session as undefined.
33 #define T_FREE (0) // A tunnel ID that won't ever be used. Mark session as free.
35 #define MAXCONTROL 1000 // max length control message we ever send...
36 #define MINMTU 576 // minimum recommended MTU (rfc1063)
37 #define MAXMTU 2600 // arbitrary maximum MTU
38 #define PPPoE_MRU 1492 // maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2))
39 #define MAXETHER (MAXMTU+18) // max packet we try sending to tun
40 #define MAXTEL 96 // telephone number
41 #define MAXHOSTNAME 256 // hostname
42 #define MAXUSER 128 // username
43 #define MAXPASS 128 // password
44 #define MAXPLUGINS 20 // maximum number of plugins to load
45 #define MAXRADSERVER 10 // max radius servers
46 #define MAXROUTE 10 // max static routes per session
47 #define MAXIPPOOL 131072 // max number of ip addresses in pool
48 #define RINGBUFFER_SIZE 10000 // Number of ringbuffer entries to allocate
49 #define MAX_LOG_LENGTH 512 // Maximum size of log message
50 #define ECHO_TIMEOUT 10 // Time between last packet sent and LCP ECHO generation
51 #define IDLE_TIMEOUT 240 // Time between last packet seen and session shutdown
52 #define BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
54 #define MP_BEGIN 0x80 // This value is used when (b)egin bit is set in MP header
55 #define MP_END 0x40 // This value is used when (e)nd bit is set in MP header
56 #define MP_BOTH_BITS 0xC0 // This value is used when both bits (begin and end) are set in MP header
58 #define MINFRAGLEN 64 // Minumum fragment length
59 #define MAXFRAGLEN 750 // Maximum length for Multilink fragment (MTU / 2 sessions)
60 #define MAXFRAGNUM 128 // Maximum number of Multilink fragment in a bundle (must be in the form of 2^X)
61 // it's not expected to have a space for more than 10 unassembled packets = 10 * MAXBUNDLESES
62 #define MAXFRAGNUM_MASK 127 // Must be equal to MAXFRAGNUM-1
66 #define ETCDIR "/etc/l2tpns"
70 #define LIBDIR "/usr/lib/l2tpns"
74 #define PLUGINDIR LIBDIR // Plugins
78 #define PLUGINCONF ETCDIR // Plugin config dir
82 #define FLASHDIR ETCDIR
85 #define TUNDEVICE "/dev/net/tun"
86 #define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking
87 #define CONFIGFILE FLASHDIR "/startup-config" // Configuration file
88 #define CLIUSERS FLASHDIR "/users" // CLI Users file
89 #define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration
90 #define ACCT_TIME 3000 // 5 minute accounting interval
91 #define ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions
92 #define L2TPPORT 1701 // L2TP port
93 #define RADPORT 1645 // old radius port...
94 #define DAEPORT 3799 // DAE port
95 #define PKTARP 0x0806 // ARP packet type
96 #define PKTIP 0x0800 // IPv4 packet type
97 #define PKTIPV6 0x86DD // IPv6 packet type
99 #define PPPCHAP 0xC223
100 #define PPPLCP 0xC021
101 #define PPPIPCP 0x8021
102 #define PPPIPV6CP 0x8057
103 #define PPPCCP 0x80FD
105 #define PPPIPV6 0x0057
107 #define MIN_IP_SIZE 0x19
130 AccessChallenge
= 11,
131 DisconnectRequest
= 40,
162 // reset state machine counters
163 #define initialise_restart_count(_s, _fsm) \
164 sess_local[_s]._fsm.conf_sent = \
165 sess_local[_s]._fsm.nak_sent = 0
168 #define zero_restart_count(_s, _fsm) ({ \
169 sess_local[_s]._fsm.conf_sent = \
170 config->ppp_max_configure; \
171 sess_local[_s]._fsm.restart = \
172 time_now + config->ppp_restart_time; \
175 // increment ConfReq counter and reset timer
176 #define restart_timer(_s, _fsm) ({ \
177 sess_local[_s]._fsm.conf_sent++; \
178 sess_local[_s]._fsm.restart = \
179 time_now + config->ppp_restart_time; \
182 // stop timer on change to state where timer does not run
183 #define change_state(_s, _fsm, _new) ({ \
184 if (_new != session[_s].ppp._fsm) \
193 sess_local[_s]._fsm.restart = 0; \
194 initialise_restart_count(_s, _fsm); \
196 session[_s].ppp._fsm = _new; \
197 cluster_send_session(_s); \
202 typedef uint16_t sessionidt
;
203 typedef uint16_t bundleidt
;
204 typedef uint16_t tunnelidt
;
205 typedef uint32_t clockt
;
206 typedef uint8_t hasht
[16];
209 struct cli_session_actions
{
219 #define CLI_SESS_KILL 0x01
220 #define CLI_SESS_SNOOP 0x02
221 #define CLI_SESS_NOSNOOP 0x04
222 #define CLI_SESS_THROTTLE 0x08
223 #define CLI_SESS_NOTHROTTLE 0x10
224 #define CLI_SESS_FILTER 0x20
225 #define CLI_SESS_NOFILTER 0x40
227 struct cli_tunnel_actions
{
231 #define CLI_TUN_KILL 0x01
234 typedef struct // route
241 typedef struct controls
// control message
243 struct controls
*next
; // next in queue
244 uint16_t length
; // length
246 uint8_t buf
[MAXCONTROL
];
247 uint16_t buf16
[MAXCONTROL
/2];
248 } __attribute__ ((__transparent_union__
));
253 uint8_t length
; // Endpoint Discriminator length
254 uint8_t addr_class
; // Endpoint Discriminator class
255 uint8_t address
[MAXADDRESS
]; // Endpoint Discriminator address
259 sessionidt sid
; // Fragment originating session
260 uint8_t flags
; // MP frame flags
261 uint32_t seq
; // fragment seq num
262 uint16_t length
; // Fragment length
263 uint8_t data
[MAXFRAGLEN
]; // Fragment data
268 sessionidt next
; // next session in linked list
269 sessionidt far
; // far end session ID
270 tunnelidt tunnel
; // near end tunnel ID
271 uint8_t flags
; // session flags: see SESSION_*
273 uint8_t phase
; // PPP phase
274 uint8_t lcp
:4; // LCP state
275 uint8_t ipcp
:4; // IPCP state
276 uint8_t ipv6cp
:4; // IPV6CP state
277 uint8_t ccp
:4; // CCP state
279 char reserved_1
[2]; // unused: padding
280 in_addr_t ip
; // IP of session set by RADIUS response (host byte order).
281 int ip_pool_index
; // index to IP pool
282 uint32_t unique_id
; // unique session id
283 char reserved_2
[4]; // unused: was ns/nr
284 uint32_t magic
; // ppp magic number
285 uint32_t pin
, pout
; // packet counts
286 uint32_t cin
, cout
; // byte counts
287 uint32_t cin_wrap
, cout_wrap
; // byte counter wrap count (RADIUS accounting giagawords)
288 uint32_t cin_delta
, cout_delta
; // byte count changes (for dump_session())
289 uint16_t throttle_in
; // upstream throttle rate (kbps)
290 uint16_t throttle_out
; // downstream throttle rate
291 uint8_t filter_in
; // input filter index (to ip_filters[N-1]; 0 if none)
292 uint8_t filter_out
; // output filter index
293 uint16_t mru
; // maximum receive unit
294 clockt opened
; // when started
295 clockt die
; // being closed, when to finally free
296 uint32_t session_timeout
; // Maximum session time in seconds
297 uint32_t idle_timeout
; // Maximum idle time in seconds
298 time_t last_packet
; // Last packet from the user (used for idle timeouts)
299 time_t last_data
; // Last data packet to/from the user (used for idle timeouts)
300 in_addr_t dns1
, dns2
; // DNS servers
301 routet route
[MAXROUTE
]; // static routes
302 uint16_t tbf_in
; // filter bucket for throttling in from the user.
303 uint16_t tbf_out
; // filter bucket for throttling out to the user.
304 int random_vector_length
;
305 uint8_t random_vector
[MAXTEL
];
306 char user
[MAXUSER
]; // user (needed in seesion for radius stop messages)
307 char called
[MAXTEL
]; // called number
308 char calling
[MAXTEL
]; // calling number
309 uint32_t tx_connect_speed
;
310 uint32_t rx_connect_speed
;
311 clockt timeout
; // Session timeout
312 uint32_t mrru
; // Multilink Max-Receive-Reconstructed-Unit
313 uint8_t mssf
; // Multilink Short Sequence Number Header Format
314 epdist epdis
; // Multilink Endpoint Discriminator
315 bundleidt bundle
; // Multilink Bundle Identifier
316 in_addr_t snoop_ip
; // Interception destination IP
317 uint16_t snoop_port
; // Interception destination port
318 uint8_t walled_garden
; // is this session gardened?
319 uint8_t ipv6prefixlen
; // IPv6 route prefix length
320 struct in6_addr ipv6route
; // Static IPv6 route
321 char reserved_3
[11]; // Space to expand structure without changing HB_VERSION
327 int state
; // current state (bundlestate enum)
328 uint32_t seq_num_t
; // Sequence Number (transmission)
329 uint32_t timeout
; // Session-Timeout for bundle
330 uint32_t max_seq
; // Max value of sequence number field
331 uint8_t num_of_links
; // Number of links joint to this bundle
332 uint32_t online_time
; // The time this bundle is online
333 clockt last_check
; // Last time the timeout is checked
334 uint32_t mrru
; // Multilink Max-Receive-Reconstructed-Unit
335 uint8_t mssf
; // Multilink Short Sequence Number Header Format
336 epdist epdis
; // Multilink Endpoint Discriminator
337 char user
[MAXUSER
]; // Needed for matching member links
338 sessionidt current_ses
; // Current session to use for sending (used in RR load-balancing)
339 sessionidt members
[MAXBUNDLESES
]; // Array for member links sessions
345 fragmentt fragment
[MAXFRAGNUM
];
346 uint8_t reassembled_frame
[MAXETHER
]; // The reassembled frame
347 uint16_t re_frame_len
; // The reassembled frame length
348 uint16_t re_frame_begin_index
, re_frame_end_index
; // reassembled frame begin index, end index respectively
349 uint16_t start_index
, end_index
; // start and end sequence numbers available on the fragments array respectively
350 uint32_t M
; // Minumum frame sequence number received over all bundle members
351 uint32_t start_seq
; // Last received frame sequence number (bearing B bit)
355 #define AUTHPAP 1 // allow PAP
356 #define AUTHCHAP 2 // allow CHAP
368 // PPP restart timer/counters
373 } lcp
, ipcp
, ipv6cp
, ccp
;
375 // identifier for Protocol-Reject, Code-Reject
378 // authentication to use
390 // our Endpoint Discriminator
394 clockt last_packet_out
;
395 uint32_t packets_out
;
396 uint32_t packets_dropped
;
398 // RADIUS session in use
407 // Last Multilink frame sequence number received
412 #define SESSION_PFC (1 << 0) // use Protocol-Field-Compression
413 #define SESSION_ACFC (1 << 1) // use Address-and-Control-Field-Compression
414 #define SESSION_STARTED (1 << 2) // RADIUS Start record sent
416 // 168 bytes per tunnel
419 tunnelidt far
; // far end tunnel ID
420 in_addr_t ip
; // Ip for far end
421 uint16_t port
; // port for far end
422 uint16_t window
; // Rx window
423 uint16_t nr
; // next receive
424 uint16_t ns
; // next send
425 int state
; // current state (tunnelstate enum)
426 clockt last
; // when last control message sent (used for resend timeout)
427 clockt retry
; // when to try resending pending control
428 clockt die
; // being closed, when to finally free
429 clockt lastrec
; // when the last control message was received
430 char hostname
[128]; // tunnel hostname
431 char vendor
[128]; // LAC vendor
432 uint8_t try; // number of retrys on a control message
433 uint16_t controlc
; // outstaind messages in queue
434 controlt
*controls
; // oldest message
435 controlt
*controle
; // newest message
439 // 164 bytes per radius session
440 typedef struct // outstanding RADIUS requests
442 sessionidt session
; // which session this applies to
443 hasht auth
; // request authenticator
444 clockt retry
; // when to try next
445 char pass
[129]; // password
446 uint8_t id
; // ID for PPP response
447 uint8_t try; // which try we are on
448 uint8_t state
; // state of radius requests
449 uint8_t chap
; // set if CHAP used (is CHAP identifier)
450 uint8_t term_cause
; // Stop record: Acct-Terminate-Cause
451 char const *term_msg
; // terminate reason
457 in_addr_t address
; // Host byte order..
458 char assigned
; // 1 if assigned, 0 if free
460 clockt last
; // last used
461 char user
[129]; // user (try to have ip addresses persistent)
472 char message
[MAX_LOG_LENGTH
];
473 } buffer
[RINGBUFFER_SIZE
];
480 * Possible tunnel states
481 * TUNNELFREE -> TUNNELOPEN -> TUNNELDIE -> TUNNELFREE
485 TUNNELFREE
, // Not in use
486 TUNNELOPEN
, // Active tunnel
487 TUNNELDIE
, // Currently closing
488 TUNNELOPENING
, // Busy opening
489 TUNNELUNDEF
, // Undefined
494 BUNDLEFREE
, // Not in use
495 BUNDLEOPEN
, // Active bundle
496 BUNDLEUNDEF
, // Undefined
501 NULLCLASS
= 0, //End Point Discriminator classes
511 RADIUSNULL
, // Not in use
512 RADIUSCHAP
, // sending CHAP down PPP
513 RADIUSAUTH
, // sending auth to RADIUS server
514 RADIUSSTART
, // sending start accounting to RADIUS server
515 RADIUSSTOP
, // sending stop accounting to RADIUS server
516 RADIUSINTERIM
, // sending interim accounting to RADIUS server
517 RADIUSWAIT
, // waiting timeout before available, in case delayed replies
518 RADIUSJUSTAUTH
, // sending auth to RADIUS server, just authentication, no ip assigning
526 uint32_t tun_rx_packets
;
527 uint32_t tun_tx_packets
;
528 uint32_t tun_rx_bytes
;
529 uint32_t tun_tx_bytes
;
530 uint32_t tun_rx_errors
;
531 uint32_t tun_tx_errors
;
532 uint32_t tun_rx_dropped
;
534 uint32_t tunnel_rx_packets
;
535 uint32_t tunnel_tx_packets
;
536 uint32_t tunnel_rx_bytes
;
537 uint32_t tunnel_tx_bytes
;
538 uint32_t tunnel_rx_errors
;
539 uint32_t tunnel_tx_errors
;
541 uint32_t tunnel_retries
;
542 uint32_t radius_retries
;
546 uint32_t packets_snooped
;
548 uint32_t tunnel_created
;
549 uint32_t session_created
;
550 uint32_t tunnel_timeout
;
551 uint32_t session_timeout
;
552 uint32_t radius_timeout
;
553 uint32_t radius_overflow
;
554 uint32_t tunnel_overflow
;
555 uint32_t session_overflow
;
557 uint32_t ip_allocated
;
560 uint32_t c_forwarded
;
561 uint32_t recv_forward
;
563 uint32_t select_called
;
564 uint32_t multi_read_used
;
565 uint32_t multi_read_exceeded
;
568 uint32_t call_processtun
;
569 uint32_t call_processipout
;
570 uint32_t call_processipv6out
;
571 uint32_t call_processudp
;
572 uint32_t call_sessionbyip
;
573 uint32_t call_sessionbyipv6
;
574 uint32_t call_sessionbyuser
;
575 uint32_t call_sendarp
;
576 uint32_t call_sendipcp
;
577 uint32_t call_sendipv6cp
;
578 uint32_t call_processipv6cp
;
579 uint32_t call_tunnelsend
;
580 uint32_t call_sessionkill
;
581 uint32_t call_sessionshutdown
;
582 uint32_t call_tunnelkill
;
583 uint32_t call_tunnelshutdown
;
584 uint32_t call_assign_ip_address
;
585 uint32_t call_free_ip_address
;
586 uint32_t call_dump_acct_info
;
587 uint32_t call_sessionsetup
;
588 uint32_t call_processpap
;
589 uint32_t call_processchap
;
590 uint32_t call_processlcp
;
591 uint32_t call_processipcp
;
592 uint32_t call_processipin
;
593 uint32_t call_processipv6in
;
594 uint32_t call_processccp
;
595 uint32_t call_sendchap
;
596 uint32_t call_processrad
;
597 uint32_t call_radiussend
;
598 uint32_t call_radiusretry
;
599 uint32_t call_random_data
;
606 #define CSTAT(x) STAT(call_ ## x)
611 #define STAT(x) (_statistics->x++)
612 #define INC_STAT(x,y) (_statistics->x += (y))
613 #define GET_STAT(x) (_statistics->x)
614 #define SET_STAT(x, y) (_statistics->x = (y))
618 #define INC_STAT(x,y)
619 #define GET_STAT(x) 0
620 #define SET_STAT(x, y)
629 int debug
; // debugging level
630 time_t start_time
; // time when l2tpns was started
631 char bandwidth
[256]; // current bandwidth
632 char pid_file
[256]; // file to write PID to on startup
634 clockt current_time
; // 1/10ths of a second since the process started.
635 // means that we can only run a given process
636 // for 13 years without re-starting!
638 char config_file
[128];
639 int reload_config
; // flag to re-read config (set by cli)
640 int multi_read_count
; // amount of packets to read per fd in processing loop
642 char tundevice
[IFNAMSIZ
]; // tun device name
643 char log_filename
[128];
645 char l2tp_secret
[64]; // L2TP shared secret
646 int l2tp_mtu
; // MTU of interface used for L2TP
648 char random_device
[256]; // random device path, defaults to RANDOMDEVICE
650 int ppp_restart_time
; // timeout for PPP restart
651 int ppp_max_configure
; // max lcp configure requests to send
652 int ppp_max_failure
; // max lcp configure naks to send
654 char radiussecret
[64];
655 int radius_accounting
;
657 in_addr_t radiusserver
[MAXRADSERVER
]; // radius servers
658 uint16_t radiusport
[MAXRADSERVER
]; // radius base ports
659 uint8_t numradiusservers
; // radius server count
661 uint16_t radius_dae_port
; // port for radius DAE
662 uint16_t radius_bind_min
; // port range for udp sockets used to send/recv radius packets
663 uint16_t radius_bind_max
;
665 char radius_authtypes_s
[32]; // list of valid authentication types (chap, pap) in order of preference
666 int radius_authtypes
;
667 int radius_authprefer
;
669 int allow_duplicate_users
; // allow multiple logins with the same username
670 int kill_timedout_sessions
; // kill authenticated sessions with "session_timeout == 0"
672 in_addr_t default_dns1
, default_dns2
;
674 unsigned long rl_rate
; // default throttle rate
675 int num_tbfs
; // number of throttle buckets
677 char accounting_dir
[128];
678 in_addr_t bind_address
;
679 in_addr_t peer_address
;
680 int send_garp
; // Set to true to garp for vip address on startup
683 char plugins
[64][MAXPLUGINS
];
684 char old_plugins
[64][MAXPLUGINS
];
686 int next_tbf
; // Next HTB id available to use
687 int scheduler_fifo
; // If the system has multiple CPUs, use FIFO scheduling
688 // policy for this process.
689 int lock_pages
; // Lock pages into memory.
690 int icmp_rate
; // Max number of ICMP unreachable per second to send
691 int max_packets
; // DoS prevention: per session limit of packets/0.1s
692 char epdis_addr
[20]; // MP Endpoint Discriminator address
694 in_addr_t cluster_address
; // Multicast address of cluster.
695 // Send to this address to have everyone hear.
696 char cluster_interface
[64]; // Which interface to listen for multicast on.
697 int cluster_iam_master
; // Are we the cluster master???
698 int cluster_iam_uptodate
; // Set if we've got a full set of state from the master.
699 in_addr_t cluster_master_address
; // The network address of the cluster master.
700 // Zero if i am the cluster master.
701 int cluster_seq_number
; // Sequence number of the next heartbeat we'll send out
702 // (or the seq number we're next expecting if we're a slave).
703 int cluster_undefined_sessions
; // How many sessions we're yet to receive from the master.
704 int cluster_undefined_bundles
; // How many bundles we're yet to receive from the master.
705 int cluster_undefined_tunnels
; // How many tunnels we're yet to receive from the master.
706 int cluster_highest_sessionid
;
707 int cluster_highest_bundleid
;
708 int cluster_highest_tunnelid
;
709 clockt cluster_last_hb
; // Last time we saw a heartbeat from the master.
710 int cluster_last_hb_ver
; // Heartbeat version last seen from master
711 int cluster_num_changes
; // Number of changes queued.
713 int cluster_mcast_ttl
; // TTL for multicast packets
714 int cluster_hb_interval
; // How often to send a heartbeat.
715 int cluster_hb_timeout
; // How many missed heartbeats trigger an election.
716 uint64_t cluster_table_version
; // # state changes processed by cluster
718 struct in6_addr ipv6_prefix
; // Our IPv6 network pool.
721 int cluster_master_min_adv
; // Master advertises routes while the number of up to date
722 // slaves is less than this value.
723 in_addr_t cli_bind_address
; // bind address for CLI
724 char hostname
[MAXHOSTNAME
]; // hostname (overridden by -h on command line)
726 char guest_user
[MAXUSER
]; // Guest account username
729 #define BGP_NUM_PEERS 2
736 struct in_addr update_source
;
737 } neighbour
[BGP_NUM_PEERS
];
738 in_addr_t nexthop_address
;
739 struct in6_addr nexthop6_address
;
743 enum config_typet
{ INT
, STRING
, UNSIGNED_LONG
, SHORT
, BOOL
, IPv4
, IPv6
};
749 enum config_typet type
;
754 uint8_t op
; // operation
755 #define FILTER_PORT_OP_NONE 0 // all ports match
756 #define FILTER_PORT_OP_EQ 1
757 #define FILTER_PORT_OP_NEQ 2
758 #define FILTER_PORT_OP_GT 3
759 #define FILTER_PORT_OP_LT 4
760 #define FILTER_PORT_OP_RANGE 5
761 uint16_t port
; // port (host byte order)
762 uint16_t port2
; // range
767 int action
; // permit/deny
768 #define FILTER_ACTION_DENY 1
769 #define FILTER_ACTION_PERMIT 2
770 uint8_t proto
; // protocol: IPPROTO_* (netinet/in.h)
771 in_addr_t src_ip
; // source ip (network byte order)
773 ip_filter_portt src_ports
;
774 in_addr_t dst_ip
; // dest ip
776 ip_filter_portt dst_ports
;
777 uint8_t frag
; // apply to non-initial fragments
778 uint8_t tcp_flag_op
; // match type: any, all, established
779 #define FILTER_FLAG_OP_ANY 1
780 #define FILTER_FLAG_OP_ALL 2
781 #define FILTER_FLAG_OP_EST 3
782 uint8_t tcp_sflags
; // flags set
783 uint8_t tcp_cflags
; // flags clear
784 uint32_t counter
; // match count
787 #define TCP_FLAG_FIN 0x01
788 #define TCP_FLAG_SYN 0x02
789 #define TCP_FLAG_RST 0x04
790 #define TCP_FLAG_PSH 0x08
791 #define TCP_FLAG_ACK 0x10
792 #define TCP_FLAG_URG 0x20
795 #define MAXFILTER_RULES 32
798 char name
[32]; // ACL name
799 int extended
; // type: 0 = standard, 1 = extended
800 ip_filter_rulet rules
[MAXFILTER_RULES
];
801 int used
; // session ref count
804 // CDN result/error codes
805 #define CDN_NONE 0, 0
806 #define CDN_TRY_ANOTHER 2, 7
807 #define CDN_ADMIN_DISC 3, 0
808 #define CDN_UNAVAILABLE 4, 0
810 // RADIUS Acct-Terminate-Cause values
811 #define TERM_USER_REQUEST 1
812 #define TERM_LOST_CARRIER 2
813 #define TERM_LOST_SERVICE 3
814 #define TERM_IDLE_TIMEOUT 4
815 #define TERM_SESSION_TIMEOUT 5
816 #define TERM_ADMIN_RESET 6
817 #define TERM_ADMIN_REBOOT 7
818 #define TERM_PORT_ERROR 8
819 #define TERM_NAS_ERROR 9
820 #define TERM_NAS_REQUEST 10
821 #define TERM_NAS_REBOOT 11
822 #define TERM_PORT_UNNEEDED 12
823 #define TERM_PORT_PREEMPTED 13
824 #define TERM_PORT_SUSPENDED 14
825 #define TERM_SERVICE_UNAVAILABLE 15
826 #define TERM_CALLBACK 16
827 #define TERM_USER_ERROR 17
828 #define TERM_HOST_REQUEST 18
829 #define TERM_SUPPLICANT_RESTART 19
830 #define TERM_REAUTHENTICATION_FAILURE 20
831 #define TERM_PORT_REINIT 21
832 #define TERM_PORT_DISABLED 22
835 void sendarp(int ifr_idx
, const unsigned char* mac
, in_addr_t ip
);
839 void processpap(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
840 void processchap(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
841 void lcp_open(sessionidt s
, tunnelidt t
);
842 void processlcp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
843 void processipcp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
844 void processipv6cp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
845 void processipin(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
846 void processmpin(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
847 void processmpframe(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
, uint8_t extra
);
848 void processipv6in(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
849 void processccp(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
);
850 void sendchap(sessionidt s
, tunnelidt t
);
851 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
);
852 void sendlcp(sessionidt s
, tunnelidt t
);
853 void send_ipin(sessionidt s
, uint8_t *buf
, int len
);
854 void sendccp(sessionidt s
, tunnelidt t
);
855 void protoreject(sessionidt s
, tunnelidt t
, uint8_t *p
, uint16_t l
, uint16_t proto
);
856 int join_bundle(sessionidt s
);
861 void radiussend(uint16_t r
, uint8_t state
);
862 void processrad(uint8_t *buf
, int len
, char socket_index
);
863 void radiusretry(uint16_t r
);
864 uint16_t radiusnew(sessionidt s
);
865 void radiusclear(uint16_t r
, sessionidt s
);
866 void processdae(uint8_t *buf
, int len
, struct sockaddr_in
*addr
, int alen
, struct in_addr
*local
);
870 clockt
backoff(uint8_t try);
871 void send_ipv6_ra(sessionidt s
, tunnelidt t
, struct in6_addr
*ip
);
872 void route6set(sessionidt s
, struct in6_addr ip
, int prefixlen
, int add
);
873 sessionidt
sessionbyip(in_addr_t ip
);
874 sessionidt
sessionbyipv6(struct in6_addr ip
);
875 sessionidt
sessionbyuser(char *username
);
876 void increment_counter(uint32_t *counter
, uint32_t *wrap
, uint32_t delta
);
877 void random_data(uint8_t *buf
, int len
);
878 void sessionkill(sessionidt s
, char *reason
);
879 void sessionshutdown(sessionidt s
, char const *reason
, int cdn_result
, int cdn_error
, int term_cause
);
880 void filter_session(sessionidt s
, int filter_in
, int filter_out
);
881 void send_garp(in_addr_t ip
);
882 void tunnelsend(uint8_t *buf
, uint16_t l
, tunnelidt t
);
883 int tun_write(uint8_t *data
, int size
);
884 void adjust_tcp_mss(sessionidt s
, tunnelidt t
, uint8_t *buf
, int len
, uint8_t *tcp
);
885 void sendipcp(sessionidt s
, tunnelidt t
);
886 void sendipv6cp(sessionidt s
, tunnelidt t
);
887 void processudp(uint8_t *buf
, int len
, struct sockaddr_in
*addr
);
888 void snoop_send_packet(uint8_t *packet
, uint16_t size
, in_addr_t destination
, uint16_t port
);
889 int find_filter(char const *name
, size_t len
);
890 int ip_filter(uint8_t *buf
, int len
, uint8_t filter
);
891 int cmd_show_ipcache(struct cli_def
*cli
, char *command
, char **argv
, int argc
);
892 int cmd_show_hist_idle(struct cli_def
*cli
, char *command
, char **argv
, int argc
);
893 int cmd_show_hist_open(struct cli_def
*cli
, char *command
, char **argv
, int argc
);
897 #define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
898 #define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); })
900 void _log(int level
, sessionidt s
, tunnelidt t
, const char *format
, ...) __attribute__((format (printf
, 4, 5)));
901 void _log_hex(int level
, const char *title
, const uint8_t *data
, int maxsize
);
904 int sessionsetup(sessionidt s
, tunnelidt t
);
905 int run_plugins(int plugin_type
, void *data
);
906 void rebuild_address_pool(void);
907 void throttle_session(sessionidt s
, int rate_in
, int rate_out
);
908 int load_session(sessionidt
, sessiont
*);
909 void become_master(void); // We're the master; kick off any required master initializations.
914 void cli_init_hostname(char *hostname
);
915 void cli_do_file(FILE *fh
);
916 void cli_do(int sockfd
);
917 int cli_arg_help(struct cli_def
*cli
, int cr_ok
, char *entry
, ...);
921 void host_unreachable(in_addr_t destination
, uint16_t id
, in_addr_t source
, uint8_t *packet
, int packet_len
);
924 extern tunnelt
*tunnel
;
925 extern bundlet
*bundle
;
926 extern sessiont
*session
;
927 extern sessionlocalt
*sess_local
;
928 extern ippoolt
*ip_address_pool
;
929 #define sessionfree (session[0].next)
932 extern configt
*config
;
933 extern time_t basetime
; // Time when this process started.
934 extern time_t time_now
; // Seconds since EPOCH.
935 extern char main_quit
;
936 extern uint32_t last_id
;
937 extern struct Tstats
*_statistics
;
938 extern in_addr_t my_address
;
954 int index
; // for RADIUS, BGP
957 #define TIME (config->current_time)
962 // macros for handling help in cli commands
963 #define CLI_HELP_REQUESTED (argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?')
964 #define CLI_HELP_NO_ARGS (argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL)
966 // CVS identifiers (for "show version file")
967 extern char const *cvs_id_arp
;
968 extern char const *cvs_id_cli
;
969 extern char const *cvs_id_cluster
;
970 extern char const *cvs_id_constants
;
971 extern char const *cvs_id_control
;
972 extern char const *cvs_id_icmp
;
973 extern char const *cvs_id_l2tpns
;
974 extern char const *cvs_id_ll
;
975 extern char const *cvs_id_md5
;
976 extern char const *cvs_id_ppp
;
977 extern char const *cvs_id_radius
;
978 extern char const *cvs_id_tbf
;
979 extern char const *cvs_id_util
;
981 #endif /* __L2TPNS_H__ */