X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/ab7669fc2deccce57e76bcf53d533b8c2fab85e0..b4f2e323ff709c033b60a973e1c52feb1aabc9b1:/l2tpns.h diff --git a/l2tpns.h b/l2tpns.h index 048d4c9..e690ec6 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,47 +1,71 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.43 2004/12/01 02:52:46 bodea Exp $ +// $Id: l2tpns.h,v 1.121 2009-12-08 14:49:28 bodea Exp $ #ifndef __L2TPNS_H__ #define __L2TPNS_H__ #include -#include #include #include #include #include +#include #include #include #include #include -#define VERSION "2.0.11" +#define VERSION "2.2.1" // Limits #define MAXTUNNEL 500 // could be up to 65535 -#define MAXSESSION 50000 // could be up to 65535 +#define MAXBUNDLE 300 // could be up to 65535 +#define MAXBUNDLESES 12 // Maximum number of member links in bundle +#define MAXADDRESS 20 // Maximum length for the Endpoint Discrminiator address +#define MAXSESSION 60000 // could be up to 65535 #define MAXTBFS 6000 // Maximum token bucket filters. Might need up to 2 * session. -#define RADIUS_SHIFT 5 -#define RADIUS_MASK ((unsigned short)(((unsigned short)~0) >> (16 - RADIUS_SHIFT))) -#define MAXRADIUS ((unsigned long)(1L << RADIUS_SHIFT) * 255) +// Tunnel Id reserved for pppoe +#define TUNNEL_ID_PPPOE 1 + +#define RADIUS_SHIFT 6 +#define RADIUS_FDS (1 << RADIUS_SHIFT) +#define RADIUS_MASK ((1 << RADIUS_SHIFT) - 1) +#define MAXRADIUS (1 << (8 + RADIUS_SHIFT)) #define T_UNDEF (0xffff) // A tunnel ID that won't ever be used. Mark session as undefined. #define T_FREE (0) // A tunnel ID that won't ever be used. Mark session as free. -#define MAXCONTROL 1000 // max length control message we ever send... -#define MAXETHER (1500+18) // max packet we try sending to tun -#define MAXTEL 96 // telephone number +#define MAXCONTROL 1000 // max length control message we ever send... +#define MINMTU 576 // minimum recommended MTU (rfc1063) +#define MAXMTU 2600 // arbitrary maximum MTU +#define PPPoE_MRU 1492 // maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2)) +#define MAXETHER (MAXMTU+18) // max packet we try sending to tun +#define MAXTEL 96 // telephone number +#define MAXHOSTNAME 256 // hostname +#define MAXUSER 128 // username +#define MAXPASS 128 // password +#define MAXCLASS 128 // radius class attribute size #define MAXPLUGINS 20 // maximum number of plugins to load #define MAXRADSERVER 10 // max radius servers -#define MAXROUTE 10 // max static routes per session +#define MAXROUTE 10 // max static routes per session #define MAXIPPOOL 131072 // max number of ip addresses in pool #define RINGBUFFER_SIZE 10000 // Number of ringbuffer entries to allocate #define MAX_LOG_LENGTH 512 // Maximum size of log message -#define ECHO_TIMEOUT 60 // Time between last packet sent and LCP ECHO generation -#define IDLE_TIMEOUT 240 // Time between last packet sent and LCP ECHO generation +#define ECHO_TIMEOUT 10 // Time between last packet sent and LCP ECHO generation +#define IDLE_ECHO_TIMEOUT 240 // Time between last packet seen and session shutdown #define BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown +#define MP_BEGIN 0x80 // This value is used when (b)egin bit is set in MP header +#define MP_END 0x40 // This value is used when (e)nd bit is set in MP header +#define MP_BOTH_BITS 0xC0 // This value is used when both bits (begin and end) are set in MP header + +#define MINFRAGLEN 64 // Minumum fragment length +#define MAXFRAGLEN 1496 // Maximum length for Multilink fragment (The multilink may contain only one link) +#define MAXFRAGNUM 512 // Maximum number of Multilink fragment in a bundle (must be in the form of 2^X) + // it's not expected to have a space for more than 10 unassembled packets = 10 * MAXBUNDLESES +#define MAXFRAGNUM_MASK 511 // Must be equal to MAXFRAGNUM-1 + // Constants #ifndef ETCDIR #define ETCDIR "/etc/l2tpns" @@ -51,10 +75,6 @@ #define LIBDIR "/usr/lib/l2tpns" #endif -#ifndef STATEDIR -#define STATEDIR "/var/lib/l2tpns" -#endif - #ifndef PLUGINDIR #define PLUGINDIR LIBDIR // Plugins #endif @@ -67,31 +87,31 @@ #define FLASHDIR ETCDIR #endif -#ifndef DATADIR -#define DATADIR STATEDIR -#endif - #define TUNDEVICE "/dev/net/tun" -#define STATEFILE DATADIR "/state.dump" // State dump file +#define RANDOMDEVICE "/dev/urandom" // default, not as secure as /dev/random but non-blocking #define CONFIGFILE FLASHDIR "/startup-config" // Configuration file #define CLIUSERS FLASHDIR "/users" // CLI Users file #define IPPOOLFILE FLASHDIR "/ip_pool" // Address pool configuration -#define ACCT_TIME 3000 // 5 minute accounting interval -#define L2TPPORT 1701 // L2TP port -#define RADPORT 1645 // old radius port... -#define PKTARP 0x0806 // ARP packet type -#define PKTIP 0x0800 // IP packet type -#define PSEUDOMAC 0x0200 // pseudo MAC prefix (local significant MAC) -#define PPPPAP 0xC023 -#define PPPCHAP 0xC223 -#define PPPLCP 0xC021 -#define PPPIPCP 0x8021 -#define PPPCCP 0x80FD +#define ACCT_TIME 3000 // 5 minute accounting interval +#define ACCT_SHUT_TIME 600 // 1 minute for counters of shutdown sessions +#define L2TPPORT 1701 // L2TP port +#define RADPORT 1645 // old radius port... +#define DAEPORT 3799 // DAE port +#define PKTARP 0x0806 // ARP packet type +#define PKTIP 0x0800 // IPv4 packet type +#define PKTIPV6 0x86DD // IPv6 packet type +#define PPPPAP 0xC023 +#define PPPCHAP 0xC223 +#define PPPLCP 0xC021 +#define PPPIPCP 0x8021 +#define PPPIPV6CP 0x8057 +#define PPPCCP 0x80FD #define PPPIP 0x0021 +#define PPPIPV6 0x0057 #define PPPMP 0x003D #define MIN_IP_SIZE 0x19 -enum -{ + +enum { ConfigReq = 1, ConfigAck, ConfigNak, @@ -106,22 +126,95 @@ enum IdentRequest }; +enum { + AccessRequest = 1, + AccessAccept, + AccessReject, + AccountingRequest, + AccountingResponse, + AccessChallenge = 11, + DisconnectRequest = 40, + DisconnectACK, + DisconnectNAK, + CoARequest, + CoAACK, + CoANAK +}; + +// PPP phases +enum { + Dead, + Establish, + Authenticate, + Network, + Terminate +}; + +// PPP states +enum { + Initial, + Starting, + Closed, + Stopped, + Closing, + Stopping, + RequestSent, + AckReceived, + AckSent, + Opened +}; + +// reset state machine counters +#define initialise_restart_count(_s, _fsm) \ + sess_local[_s]._fsm.conf_sent = \ + sess_local[_s]._fsm.nak_sent = 0 + +// no more attempts +#define zero_restart_count(_s, _fsm) ({ \ + sess_local[_s]._fsm.conf_sent = \ + config->ppp_max_configure; \ + sess_local[_s]._fsm.restart = \ + time_now + config->ppp_restart_time; \ +}) + +// increment ConfReq counter and reset timer +#define restart_timer(_s, _fsm) ({ \ + sess_local[_s]._fsm.conf_sent++; \ + sess_local[_s]._fsm.restart = \ + time_now + config->ppp_restart_time; \ +}) + +// stop timer on change to state where timer does not run +#define change_state(_s, _fsm, _new) ({ \ + if (_new != session[_s].ppp._fsm) \ + { \ + switch (_new) \ + { \ + case Initial: \ + case Starting: \ + case Closed: \ + case Stopped: \ + case Opened: \ + sess_local[_s]._fsm.restart = 0; \ + initialise_restart_count(_s, _fsm); \ + } \ + session[_s].ppp._fsm = _new; \ + cluster_send_session(_s); \ + } \ +}) + // Types -typedef unsigned short u16; -typedef unsigned int u32; -typedef unsigned char u8; -typedef u32 ipt; -typedef u16 portt; -typedef u16 sessionidt; -typedef u16 tunnelidt; -typedef u32 clockt; -typedef u8 hasht[16]; +typedef uint16_t sessionidt; +typedef uint16_t bundleidt; +typedef uint16_t tunnelidt; +typedef uint32_t clockt; +typedef uint8_t hasht[16]; // CLI actions struct cli_session_actions { char action; - ipt snoop_ip; - u16 snoop_port; + in_addr_t snoop_ip; + uint16_t snoop_port; int throttle_in; int throttle_out; int filter_in; @@ -142,127 +235,251 @@ struct cli_tunnel_actions { #define CLI_TUN_KILL 0x01 -// dump header: update number if internal format changes -#define DUMP_MAGIC "L2TPNS#" VERSION "#" - // structures typedef struct // route { - ipt ip; - ipt mask; + in_addr_t ip; + int prefixlen; } routet; -typedef struct controls // control message +typedef struct controls // control message { - struct controls *next; // next in queue - u16 length; // length - u8 buf[MAXCONTROL]; + struct controls *next; // next in queue + uint16_t length; // length + union { + uint8_t buf[MAXCONTROL]; + uint16_t buf16[MAXCONTROL/2]; + } __attribute__ ((__transparent_union__)); } controlt; +typedef struct { + uint8_t length; // Endpoint Discriminator length + uint8_t addr_class; // Endpoint Discriminator class + uint8_t address[MAXADDRESS]; // Endpoint Discriminator address +} epdist; + +typedef struct { + sessionidt sid; // Fragment originating session + tunnelidt tid; // Fragment originating tunnel + uint8_t flags; // MP frame flags + uint32_t seq; // fragment seq num + uint32_t jitteravg; + uint16_t length; // Fragment length + uint8_t data[MAXFRAGLEN]; // Fragment data +} fragmentt; + typedef struct { sessionidt next; // next session in linked list sessionidt far; // far end session ID tunnelidt tunnel; // near end tunnel ID - ipt ip; // IP of session set by RADIUS response (host byte order). + uint8_t flags; // session flags: see SESSION_* + struct { + uint8_t phase; // PPP phase + uint8_t lcp:4; // LCP state + uint8_t ipcp:4; // IPCP state + uint8_t ipv6cp:4; // IPV6CP state + uint8_t ccp:4; // CCP state + } ppp; + uint16_t mru; // maximum receive unit + in_addr_t ip; // IP of session set by RADIUS response (host byte order). int ip_pool_index; // index to IP pool - unsigned long unique_id; // unique session id - u16 nr; // next receive - u16 ns; // next send - u32 magic; // ppp magic number - u32 cin, cout; // byte counts - u32 pin, pout; // packet counts - u32 total_cin; // This counter is never reset while a session is open - u32 total_cout; // This counter is never reset while a session is open - u32 id; // session id - u16 throttle_in; // upstream throttle rate (kbps) - u16 throttle_out; // downstream throttle rate + uint32_t unique_id; // unique session id + uint32_t magic; // ppp magic number + uint32_t pin, pout; // packet counts + uint32_t cin, cout; // byte counts + uint32_t cin_wrap, cout_wrap; // byte counter wrap count (RADIUS accounting giagawords) + uint32_t cin_delta, cout_delta; // byte count changes (for dump_session()) + uint16_t throttle_in; // upstream throttle rate (kbps) + uint16_t throttle_out; // downstream throttle rate + uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none) + uint8_t filter_out; // output filter index + uint16_t snoop_port; // Interception destination port + in_addr_t snoop_ip; // Interception destination IP clockt opened; // when started clockt die; // being closed, when to finally free + uint32_t session_timeout; // Maximum session time in seconds + uint32_t idle_timeout; // Maximum idle time in seconds time_t last_packet; // Last packet from the user (used for idle timeouts) - ipt dns1, dns2; // DNS servers + time_t last_data; // Last data packet to/from the user (used for idle timeouts) + in_addr_t dns1, dns2; // DNS servers routet route[MAXROUTE]; // static routes - u16 radius; // which radius session is being used (0 for not waiting on authentication) - u16 mru; // maximum receive unit - u16 tbf_in; // filter bucket for throttling in from the user. - u16 tbf_out; // filter bucket for throttling out to the user. - u8 l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel. - u8 reserved_old_snoop; // No longer used - remove at some time - u8 walled_garden; // is this session gardened? - u8 flags1; // additional flags (currently unused); - char random_vector[MAXTEL]; + uint16_t tbf_in; // filter bucket for throttling in from the user. + uint16_t tbf_out; // filter bucket for throttling out to the user. int random_vector_length; - char user[129]; // user (needed in seesion for radius stop messages) (can we reduce this? --mo) + uint8_t random_vector[MAXTEL]; + char user[MAXUSER]; // user (needed in session for radius stop messages) char called[MAXTEL]; // called number char calling[MAXTEL]; // calling number - u32 tx_connect_speed; - u32 rx_connect_speed; - u32 flags; // Various session flags. - ipt snoop_ip; // Interception destination IP - u16 snoop_port; // Interception destination port - u16 sid; // near end session id. - u8 filter_in; // input filter index (to ip_filters[N-1]; 0 if none) - u8 filter_out; // output filter index - char reserved[18]; // Space to expand structure without changing HB_VERSION + uint32_t tx_connect_speed; + uint32_t rx_connect_speed; + clockt timeout; // Session timeout + uint32_t mrru; // Multilink Max-Receive-Reconstructed-Unit + epdist epdis; // Multilink Endpoint Discriminator + bundleidt bundle; // Multilink Bundle Identifier + uint8_t mssf; // Multilink Short Sequence Number Header Format + uint8_t walled_garden; // is this session gardened? + uint8_t classlen; // class (needed for radius accounting messages) + char class[MAXCLASS]; + uint8_t ipv6prefixlen; // IPv6 route prefix length + struct in6_addr ipv6route; // Static IPv6 route +#ifdef LAC + sessionidt forwardtosession; // LNS id_session to forward + uint8_t src_hwaddr[ETH_ALEN]; // MAC addr source (for pppoe sessions 6 bytes) + char reserved[4]; // Space to expand structure without changing HB_VERSION +#else + uint8_t src_hwaddr[ETH_ALEN]; // MAC addr source (for pppoe sessions 6 bytes) + char reserved[6]; // Space to expand structure without changing HB_VERSION +#endif } sessiont; -#define SF_IPCP_ACKED 1 // Has this session seen an IPCP Ack? -#define SF_LCP_ACKED 2 // LCP negotiated -#define SF_CCP_ACKED 4 // CCP negotiated +typedef struct +{ + int state; // current state (bundlestate enum) + uint32_t seq_num_t; // Sequence Number (transmission) + uint32_t timeout; // Session-Timeout for bundle + uint32_t max_seq; // Max value of sequence number field + uint8_t num_of_links; // Number of links joint to this bundle + uint32_t online_time; // The time this bundle is online + clockt last_check; // Last time the timeout is checked + uint32_t mrru; // Multilink Max-Receive-Reconstructed-Unit + uint8_t mssf; // Multilink Short Sequence Number Header Format + epdist epdis; // Multilink Endpoint Discriminator + char user[MAXUSER]; // Needed for matching member links + sessionidt current_ses; // Current session to use for sending (used in RR load-balancing) + sessionidt members[MAXBUNDLESES]; // Array for member links sessions +} +bundlet; typedef struct { - u32 cin; - u32 cout; -} sessioncountt; + fragmentt fragment[MAXFRAGNUM]; + uint8_t reassembled_frame[MAXETHER]; // The reassembled frame + uint16_t re_frame_len; // The reassembled frame length + uint16_t re_frame_begin_index, re_frame_end_index; // reassembled frame begin index, end index respectively + uint16_t start_index, end_index; // start and end sequence numbers available on the fragments array respectively + uint32_t M; // Minumum frame sequence number received over all bundle members + uint32_t start_seq; // Last received frame sequence number (bearing B bit) +} +fragmentationt; -#define SESSIONPFC 1 // PFC negotiated flags -#define SESSIONACFC 2 // ACFC negotiated flags +#define AUTHPAP 1 // allow PAP +#define AUTHCHAP 2 // allow CHAP -// 168 bytes per tunnel +typedef struct +{ + // packet counters + uint32_t pin; + uint32_t pout; + + // byte counters + uint32_t cin; + uint32_t cout; + + // PPP restart timer/counters + struct { + time_t restart; + int conf_sent; + int nak_sent; + } lcp, ipcp, ipv6cp, ccp; + + // identifier for Protocol-Reject, Code-Reject + uint8_t lcp_ident; + + // authentication to use + int lcp_authtype; + + // our MRU + uint16_t ppp_mru; + + // our MRRU + uint16_t mp_mrru; + + // our mssf + uint16_t mp_mssf; + + // our Endpoint Discriminator + in_addr_t mp_epdis; + + // DoS prevention + clockt last_packet_out; + uint32_t packets_out; + uint32_t packets_dropped; + + // RADIUS session in use + uint16_t radius; + + // interim RADIUS + time_t last_interim; + + // last LCP Echo + time_t last_echo; + + // Last Multilink frame sequence number received + uint32_t last_seq; + + // jitter average of the session + uint32_t jitteravg; + // time in milliseconds of the last fragment. + uint64_t prev_time; +} sessionlocalt; + +// session flags +#define SESSION_PFC (1 << 0) // use Protocol-Field-Compression +#define SESSION_ACFC (1 << 1) // use Address-and-Control-Field-Compression +#define SESSION_STARTED (1 << 2) // RADIUS Start record sent + +// 328 bytes per tunnel typedef struct { tunnelidt far; // far end tunnel ID - ipt ip; // Ip for far end - portt port; // port for far end - u16 window; // Rx window - u16 nr; // next receive - u16 ns; // next send + in_addr_t ip; // Ip for far end + uint16_t port; // port for far end + uint16_t window; // Rx window + uint16_t nr; // next receive + uint16_t ns; // next send int state; // current state (tunnelstate enum) clockt last; // when last control message sent (used for resend timeout) - clockt retry; // when to try resenting pending control + clockt retry; // when to try resending pending control clockt die; // being closed, when to finally free clockt lastrec; // when the last control message was received char hostname[128]; // tunnel hostname char vendor[128]; // LAC vendor - u8 try; // number of retrys on a control message - u16 controlc; // outstaind messages in queue + uint8_t try; // number of retrys on a control message + uint16_t controlc; // outstaind messages in queue controlt *controls; // oldest message controlt *controle; // newest message +#ifdef LAC + uint16_t isremotelns; // != 0 if the tunnel is to remote LNS (== index on the conf remote lns) + char reserved[14]; // Space to expand structure without changing HB_VERSION +#else + char reserved[16]; // Space to expand structure without changing HB_VERSION +#endif } tunnelt; -// 180 bytes per radius session +// 164 bytes per radius session typedef struct // outstanding RADIUS requests { sessionidt session; // which session this applies to hasht auth; // request authenticator clockt retry; // when to try next - char calling[MAXTEL]; // calling number char pass[129]; // password - u8 id; // ID for PPP response - u8 try; // which try we are on - u8 state; // state of radius requests - u8 chap; // set if CHAP used (is CHAP identifier) + uint8_t id; // ID for PPP response + uint8_t try; // which try we are on + uint8_t state; // state of radius requests + uint8_t chap; // set if CHAP used (is CHAP identifier) + uint8_t term_cause; // Stop record: Acct-Terminate-Cause + char const *term_msg; // terminate reason } radiust; typedef struct { - ipt address; // Host byte order.. + in_addr_t address; // Host byte order.. char assigned; // 1 if assigned, 0 if free sessionidt session; clockt last; // last used @@ -297,92 +514,121 @@ enum TUNNELUNDEF, // Undefined }; +enum +{ + BUNDLEFREE, // Not in use + BUNDLEOPEN, // Active bundle + BUNDLEUNDEF, // Undefined +}; + +enum +{ + NULLCLASS = 0, //End Point Discriminator classes + LOCALADDR, + IPADDR, + IEEEMACADDR, + PPPMAGIC, + PSNDN, +}; + enum { RADIUSNULL, // Not in use RADIUSCHAP, // sending CHAP down PPP RADIUSAUTH, // sending auth to RADIUS server - RADIUSIPCP, // sending IPCP to end user RADIUSSTART, // sending start accounting to RADIUS server RADIUSSTOP, // sending stop accounting to RADIUS server + RADIUSINTERIM, // sending interim accounting to RADIUS server RADIUSWAIT, // waiting timeout before available, in case delayed replies - RADIUSDEAD, // errored while talking to radius server. + RADIUSJUSTAUTH, // sending auth to RADIUS server, just authentication, no ip assigning }; struct Tstats { - time_t start_time; - time_t last_reset; - - unsigned long tun_rx_packets; - unsigned long tun_tx_packets; - unsigned long tun_rx_bytes; - unsigned long tun_tx_bytes; - unsigned long tun_rx_errors; - unsigned long tun_tx_errors; - - unsigned long tunnel_rx_packets; - unsigned long tunnel_tx_packets; - unsigned long tunnel_rx_bytes; - unsigned long tunnel_tx_bytes; - unsigned long tunnel_rx_errors; - unsigned long tunnel_tx_errors; - - unsigned long tunnel_retries; - unsigned long radius_retries; - - unsigned long arp_sent; - - unsigned long packets_snooped; - - unsigned long tunnel_created; - unsigned long session_created; - unsigned long tunnel_timeout; - unsigned long session_timeout; - unsigned long radius_timeout; - unsigned long radius_overflow; - unsigned long tunnel_overflow; - unsigned long session_overflow; - - unsigned long ip_allocated; - unsigned long ip_freed; - - unsigned long c_forwarded; - unsigned long recv_forward; + time_t start_time; + time_t last_reset; + + uint32_t tun_rx_packets; + uint32_t tun_tx_packets; + uint32_t tun_rx_bytes; + uint32_t tun_tx_bytes; + uint32_t tun_rx_errors; + uint32_t tun_tx_errors; + uint32_t tun_rx_dropped; + + uint32_t tunnel_rx_packets; + uint32_t tunnel_tx_packets; + uint32_t tunnel_rx_bytes; + uint32_t tunnel_tx_bytes; + uint32_t tunnel_rx_errors; + uint32_t tunnel_tx_errors; + + uint32_t tunnel_retries; + uint32_t radius_retries; + + uint32_t arp_sent; + + uint32_t packets_snooped; + + uint32_t tunnel_created; + uint32_t session_created; + uint32_t tunnel_timeout; + uint32_t session_timeout; + uint32_t radius_timeout; + uint32_t radius_overflow; + uint32_t tunnel_overflow; + uint32_t session_overflow; + + uint32_t ip_allocated; + uint32_t ip_freed; + + uint32_t c_forwarded; + uint32_t recv_forward; + + uint32_t select_called; + uint32_t multi_read_used; + uint32_t multi_read_exceeded; + #ifdef STATISTICS - unsigned long call_processtun; - unsigned long call_processipout; - unsigned long call_processudp; - unsigned long call_sessionbyip; - unsigned long call_sessionbyuser; - unsigned long call_sendarp; - unsigned long call_sendipcp; - unsigned long call_tunnelsend; - unsigned long call_sessionkill; - unsigned long call_sessionshutdown; - unsigned long call_tunnelkill; - unsigned long call_tunnelshutdown; - unsigned long call_assign_ip_address; - unsigned long call_free_ip_address; - unsigned long call_dump_acct_info; - unsigned long call_sessionsetup; - unsigned long call_processpap; - unsigned long call_processchap; - unsigned long call_processlcp; - unsigned long call_processipcp; - unsigned long call_processipin; - unsigned long call_processccp; - unsigned long call_sendchap; - unsigned long call_processrad; - unsigned long call_radiussend; - unsigned long call_radiusretry; + uint32_t call_processtun; + uint32_t call_processipout; + uint32_t call_processipv6out; + uint32_t call_processudp; + uint32_t call_sessionbyip; + uint32_t call_sessionbyipv6; + uint32_t call_sessionbyuser; + uint32_t call_sendarp; + uint32_t call_sendipcp; + uint32_t call_sendipv6cp; + uint32_t call_processipv6cp; + uint32_t call_tunnelsend; + uint32_t call_sessionkill; + uint32_t call_sessionshutdown; + uint32_t call_tunnelkill; + uint32_t call_tunnelshutdown; + uint32_t call_assign_ip_address; + uint32_t call_free_ip_address; + uint32_t call_dump_acct_info; + uint32_t call_sessionsetup; + uint32_t call_processpap; + uint32_t call_processchap; + uint32_t call_processlcp; + uint32_t call_processipcp; + uint32_t call_processipin; + uint32_t call_processipv6in; + uint32_t call_processccp; + uint32_t call_sendchap; + uint32_t call_processrad; + uint32_t call_radiussend; + uint32_t call_radiusretry; + uint32_t call_random_data; #endif }; #ifdef STATISTICS #ifdef STAT_CALLS -#define CSTAT(x) STAT(x) +#define CSTAT(x) STAT(call_ ## x) #else #define CSTAT(x) #endif @@ -399,6 +645,10 @@ struct Tstats #define SET_STAT(x, y) #endif +#ifndef IFNAMSIZ +# define IFNAMSIZ 16 +#endif + typedef struct { int debug; // debugging level @@ -412,73 +662,126 @@ typedef struct char config_file[128]; int reload_config; // flag to re-read config (set by cli) - int cleanup_interval; // interval between regular cleanups (in seconds) int multi_read_count; // amount of packets to read per fd in processing loop - char tundevice[10]; // tun device name + char tundevicename[IFNAMSIZ]; // tun device name char log_filename[128]; - char l2tpsecret[64]; + + char l2tp_secret[64]; // L2TP shared secret + int l2tp_mtu; // MTU of interface used for L2TP + + char random_device[256]; // random device path, defaults to RANDOMDEVICE + + int ppp_restart_time; // timeout for PPP restart + int ppp_max_configure; // max lcp configure requests to send + int ppp_max_failure; // max lcp configure naks to send char radiussecret[64]; int radius_accounting; - ipt radiusserver[MAXRADSERVER]; // radius servers - u16 radiusport[MAXRADSERVER]; // radius base ports - u8 numradiusservers; // radius server count - short num_radfds; // Number of radius filehandles allocated + int radius_interim; + in_addr_t radiusserver[MAXRADSERVER]; // radius servers + uint16_t radiusport[MAXRADSERVER]; // radius base ports + uint8_t numradiusservers; // radius server count - ipt default_dns1, default_dns2; + uint16_t radius_dae_port; // port for radius DAE + uint16_t radius_bind_min; // port range for udp sockets used to send/recv radius packets + uint16_t radius_bind_max; + + char radius_authtypes_s[32]; // list of valid authentication types (chap, pap) in order of preference + int radius_authtypes; + int radius_authprefer; + + int allow_duplicate_users; // allow multiple logins with the same username + int kill_timedout_sessions; // kill authenticated sessions with "session_timeout == 0" + + in_addr_t default_dns1, default_dns2; unsigned long rl_rate; // default throttle rate int num_tbfs; // number of throttle buckets - int save_state; char accounting_dir[128]; - ipt bind_address; - ipt peer_address; + in_addr_t bind_address; + in_addr_t peer_address; int send_garp; // Set to true to garp for vip address on startup - int target_uid; int dump_speed; char plugins[64][MAXPLUGINS]; char old_plugins[64][MAXPLUGINS]; int next_tbf; // Next HTB id available to use - int scheduler_fifo; // If the system has multiple CPUs, use FIFO scheduling policy for this process. + int scheduler_fifo; // If the system has multiple CPUs, use FIFO scheduling + // policy for this process. int lock_pages; // Lock pages into memory. - int icmp_rate; // Max number of ICMP unreachable per second to send> + int icmp_rate; // Max number of ICMP unreachable per second to send + int max_packets; // DoS prevention: per session limit of packets/0.1s + char epdis_addr[20]; // MP Endpoint Discriminator address - u32 cluster_address; // Multicast address of cluster. + in_addr_t cluster_address; // Multicast address of cluster. // Send to this address to have everyone hear. char cluster_interface[64]; // Which interface to listen for multicast on. int cluster_iam_master; // Are we the cluster master??? int cluster_iam_uptodate; // Set if we've got a full set of state from the master. - u32 cluster_master_address; // The network address of the cluster master. + in_addr_t cluster_master_address; // The network address of the cluster master. // Zero if i am the cluster master. int cluster_seq_number; // Sequence number of the next heartbeat we'll send out // (or the seq number we're next expecting if we're a slave). int cluster_undefined_sessions; // How many sessions we're yet to receive from the master. + int cluster_undefined_bundles; // How many bundles we're yet to receive from the master. int cluster_undefined_tunnels; // How many tunnels we're yet to receive from the master. int cluster_highest_sessionid; + int cluster_highest_bundleid; int cluster_highest_tunnelid; clockt cluster_last_hb; // Last time we saw a heartbeat from the master. + int cluster_last_hb_ver; // Heartbeat version last seen from master int cluster_num_changes; // Number of changes queued. + int cluster_mcast_ttl; // TTL for multicast packets int cluster_hb_interval; // How often to send a heartbeat. int cluster_hb_timeout; // How many missed heartbeats trigger an election. + uint64_t cluster_table_version; // # state changes processed by cluster + + struct in6_addr ipv6_prefix; // Our IPv6 network pool. + + + int cluster_master_min_adv; // Master advertises routes while the number of up to date + // slaves is less than this value. + in_addr_t cli_bind_address; // bind address for CLI + char hostname[MAXHOSTNAME]; // hostname (overridden by -h on command line) + // Guest change + char guest_user[MAXUSER]; // Guest account username #ifdef BGP #define BGP_NUM_PEERS 2 - u16 as_number; + uint16_t as_number; struct { - char name[64]; - u16 as; - int keepalive; - int hold; - } neighbour[BGP_NUM_PEERS]; + char name[64]; + uint16_t as; + int keepalive; + int hold; + struct in_addr update_source; + } neighbour[BGP_NUM_PEERS]; + in_addr_t nexthop_address; + struct in6_addr nexthop6_address; +#endif + + int echo_timeout; // Time between last packet sent and LCP ECHO generation + int idle_echo_timeout; // Time between last packet seen and + // Drop sessions who have not responded within IDLE_ECHO_TIMEOUT seconds + in_addr_t iftun_address; +#ifdef LAC + int disable_lac_func; + int auth_tunnel_change_addr_src; + int highest_rlnsid; + uint16_t bind_portremotelns; + in_addr_t bind_address_remotelns; #endif + char pppoe_if_to_bind[IFNAMSIZ]; // Name pppoe interface to bind + char pppoe_service_name[64]; // pppoe service name + char pppoe_ac_name[64]; + uint8_t pppoe_hwaddr[ETH_ALEN]; // MAC addr of interface pppoe to bind } configt; -enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC }; +enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6 }; typedef struct { char *key; @@ -489,15 +792,15 @@ typedef struct typedef struct { - u8 op; // operation + uint8_t op; // operation #define FILTER_PORT_OP_NONE 0 // all ports match #define FILTER_PORT_OP_EQ 1 #define FILTER_PORT_OP_NEQ 2 #define FILTER_PORT_OP_GT 3 #define FILTER_PORT_OP_LT 4 #define FILTER_PORT_OP_RANGE 5 - portt port; // port (host byte order) - portt port2; // range + uint16_t port; // port (host byte order) + uint16_t port2; // range } ip_filter_portt; typedef struct @@ -505,21 +808,21 @@ typedef struct int action; // permit/deny #define FILTER_ACTION_DENY 1 #define FILTER_ACTION_PERMIT 2 - u8 proto; // protocol: IPPROTO_* (netinet/in.h) - ipt src_ip; // source ip (network byte order) - ipt src_wild; + uint8_t proto; // protocol: IPPROTO_* (netinet/in.h) + in_addr_t src_ip; // source ip (network byte order) + in_addr_t src_wild; ip_filter_portt src_ports; - ipt dst_ip; // dest ip - ipt dst_wild; + in_addr_t dst_ip; // dest ip + in_addr_t dst_wild; ip_filter_portt dst_ports; - u8 frag; // apply to non-initial fragments - u8 tcp_flag_op; // match type: any, all, established + uint8_t frag; // apply to non-initial fragments + uint8_t tcp_flag_op; // match type: any, all, established #define FILTER_FLAG_OP_ANY 1 #define FILTER_FLAG_OP_ALL 2 #define FILTER_FLAG_OP_EST 3 - u8 tcp_sflags; // flags set - u8 tcp_cflags; // flags clear - u32 counter; // match count + uint8_t tcp_sflags; // flags set + uint8_t tcp_cflags; // flags clear + uint32_t counter; // match count } ip_filter_rulet; #define TCP_FLAG_FIN 0x01 @@ -539,46 +842,114 @@ typedef struct int used; // session ref count } ip_filtert; +// CDN result/error codes +#define CDN_NONE 0, 0 +#define CDN_TRY_ANOTHER 2, 7 +#define CDN_ADMIN_DISC 3, 0 +#define CDN_UNAVAILABLE 4, 0 + +// RADIUS Acct-Terminate-Cause values +#define TERM_USER_REQUEST 1 +#define TERM_LOST_CARRIER 2 +#define TERM_LOST_SERVICE 3 +#define TERM_IDLE_TIMEOUT 4 +#define TERM_SESSION_TIMEOUT 5 +#define TERM_ADMIN_RESET 6 +#define TERM_ADMIN_REBOOT 7 +#define TERM_PORT_ERROR 8 +#define TERM_NAS_ERROR 9 +#define TERM_NAS_REQUEST 10 +#define TERM_NAS_REBOOT 11 +#define TERM_PORT_UNNEEDED 12 +#define TERM_PORT_PREEMPTED 13 +#define TERM_PORT_SUSPENDED 14 +#define TERM_SERVICE_UNAVAILABLE 15 +#define TERM_CALLBACK 16 +#define TERM_USER_ERROR 17 +#define TERM_HOST_REQUEST 18 +#define TERM_SUPPLICANT_RESTART 19 +#define TERM_REAUTHENTICATION_FAILURE 20 +#define TERM_PORT_REINIT 21 +#define TERM_PORT_DISABLED 22 + +// on slaves, alow BGP to withdraw cleanly before exiting +#define QUIT_DELAY 5 + +// quit actions (master) +#define QUIT_FAILOVER 1 // SIGTERM: exit when all control messages have been acked (for cluster failover) +#define QUIT_SHUTDOWN 2 // SIGQUIT: shutdown sessions/tunnels, reject new connections + // arp.c -void sendarp(int ifr_idx, const unsigned char* mac, ipt ip); +void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip); // ppp.c -void processpap(tunnelidt t, sessionidt s, u8 * p, u16 l); -void processchap(tunnelidt t, sessionidt s, u8 * p, u16 l); -void processlcp(tunnelidt t, sessionidt s, u8 * p, u16 l); -void processipcp(tunnelidt t, sessionidt s, u8 * p, u16 l); -void processipin(tunnelidt t, sessionidt s, u8 * p, u16 l); -void processccp(tunnelidt t, sessionidt s, u8 * p, u16 l); -void sendchap(tunnelidt t, sessionidt s); -u8 *makeppp(u8 * b, int size, u8 * p, int l, tunnelidt t, sessionidt s, u16 mtype); -void initlcp(tunnelidt t, sessionidt s); -void send_ipin(sessionidt s, u8 * buf, int len); +void processpap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void processchap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void lcp_open(sessionidt s, tunnelidt t); +void lcp_restart(sessionidt s); +void processlcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void processipcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void processipv6cp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void processmpframe(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint8_t extra); +void processipv6in(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void processccp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l); +void sendchap(sessionidt s, tunnelidt t); +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); +void sendlcp(sessionidt s, tunnelidt t); +void send_ipin(sessionidt s, uint8_t *buf, int len); +void sendccp(sessionidt s, tunnelidt t); +void protoreject(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint16_t proto); +int join_bundle(sessionidt s); // radius.c void initrad(void); -void radiussend(u16 r, u8 state); -void processrad(u8 *buf, int len, char socket_index); -void radiusretry(u16 r); -u16 radiusnew(sessionidt s); -void radiusclear(u16 r, sessionidt s); - +void radiussend(uint16_t r, uint8_t state); +void processrad(uint8_t *buf, int len, char socket_index); +void radiusretry(uint16_t r); +uint16_t radiusnew(sessionidt s); +void radiusclear(uint16_t r, sessionidt s); +void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local); +#ifdef LAC +int rad_tunnel_pwdecode(uint8_t *pl2tpsecret, size_t *pl2tpsecretlen, const char *radiussecret, const uint8_t * auth); +#endif // l2tpns.c -clockt backoff(u8 try); -sessionidt sessionbyip(ipt ip); +clockt backoff(uint8_t try); +void send_ipv6_ra(sessionidt s, tunnelidt t, struct in6_addr *ip); +void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add); +sessionidt sessionbyip(in_addr_t ip); +sessionidt sessionbyipv6(struct in6_addr ip); sessionidt sessionbyuser(char *username); -void sessionshutdown(sessionidt s, char *reason); -void send_garp(ipt ip); -void tunnelsend(u8 * buf, u16 l, tunnelidt t); -void sendipcp(tunnelidt t, sessionidt s); -void processudp(u8 * buf, int len, struct sockaddr_in *addr); -void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port); -int ip_filter(u8 *buf, int len, u8 filter); +void increment_counter(uint32_t *counter, uint32_t *wrap, uint32_t delta); +void random_data(uint8_t *buf, int len); +void sessionkill(sessionidt s, char *reason); +void sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_error, int term_cause); +void filter_session(sessionidt s, int filter_in, int filter_out); +void send_garp(in_addr_t ip); +void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t); +int tun_write(uint8_t *data, int size); +void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *tcp); +void sendipcp(sessionidt s, tunnelidt t); +void sendipv6cp(sessionidt s, tunnelidt t); +void processudp(uint8_t *buf, int len, struct sockaddr_in *addr); +void processipout(uint8_t *buf, int len); +void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, uint16_t port); +int find_filter(char const *name, size_t len); +int ip_filter(uint8_t *buf, int len, uint8_t filter); int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc); int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc); int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc); +#ifdef LAC +tunnelidt lac_new_tunnel(); +void lac_tunnelclear(tunnelidt t); +void lac_send_SCCRQ(tunnelidt t, uint8_t * auth, unsigned int auth_len); +void lac_send_ICRQ(tunnelidt t, sessionidt s); +void lac_tunnelshutdown(tunnelidt t, char *reason, int result, int error, char *msg); +#endif #undef LOG #undef LOG_HEX @@ -586,9 +957,10 @@ int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc #define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); }) void _log(int level, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 4, 5))); -void _log_hex(int level, const char *title, const char *data, int maxsize); +void _log_hex(int level, const char *title, const uint8_t *data, int maxsize); + -int sessionsetup(tunnelidt t, sessionidt s); +int sessionsetup(sessionidt s, tunnelidt t); int run_plugins(int plugin_type, void *data); void rebuild_address_pool(void); void throttle_session(sessionidt s, int rate_in, int rate_out); @@ -597,67 +969,62 @@ void become_master(void); // We're the master; kick off any required master init // cli.c -void init_cli(char *hostname); +void init_cli(); +void cli_init_complete(char *hostname); void cli_do_file(FILE *fh); void cli_do(int sockfd); int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...); // icmp.c -void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len); +void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, uint8_t *packet, int packet_len); extern tunnelt *tunnel; +extern bundlet *bundle; extern sessiont *session; -extern sessioncountt *sess_count; +extern sessionlocalt *sess_local; extern ippoolt *ip_address_pool; #define sessionfree (session[0].next) -#define log_backtrace(count, max) \ -if (count++ < max) { \ - void *array[20]; \ - char **strings; \ - int size, i; \ - LOG(0, 0, t, "Backtrace follows"); \ - size = backtrace(array, 10); \ - strings = backtrace_symbols(array, size); \ - if (strings) for (i = 0; i < size; i++) \ - { \ - LOG(0, 0, t, "%s\n", strings[i]); \ - } \ - free(strings); \ -} - extern configt *config; extern time_t basetime; // Time when this process started. extern time_t time_now; // Seconds since EPOCH. -extern u32 last_id; +extern char main_quit; +extern uint32_t last_id; extern struct Tstats *_statistics; -extern ipt my_address; -extern int tun_write(u8 *data, int size); +extern in_addr_t my_address; extern int clifd; - +extern int epollfd; + +struct event_data { + enum { + FD_TYPE_CLI, + FD_TYPE_CLUSTER, + FD_TYPE_TUN, + FD_TYPE_UDP, + FD_TYPE_CONTROL, + FD_TYPE_DAE, + FD_TYPE_RADIUS, + FD_TYPE_BGP, + FD_TYPE_NETLINK, +#ifdef LAC + FD_TYPE_UDPLAC, +#endif + FD_TYPE_PPPOEDISC, + FD_TYPE_PPPOESESS + } type; + int index; // for RADIUS, BGP +}; #define TIME (config->current_time) +extern uint16_t MRU; +extern uint16_t MSS; + // macros for handling help in cli commands #define CLI_HELP_REQUESTED (argc > 0 && argv[argc-1][strlen(argv[argc-1])-1] == '?') #define CLI_HELP_NO_ARGS (argc > 1 || argv[0][1]) ? CLI_OK : cli_arg_help(cli, 1, NULL) -// CVS identifiers (for "show version file") -extern char const *cvs_id_arp; -extern char const *cvs_id_cli; -extern char const *cvs_id_cluster; -extern char const *cvs_id_constants; -extern char const *cvs_id_control; -extern char const *cvs_id_icmp; -extern char const *cvs_id_l2tpns; -extern char const *cvs_id_ll; -extern char const *cvs_id_md5; -extern char const *cvs_id_ppp; -extern char const *cvs_id_radius; -extern char const *cvs_id_tbf; -extern char const *cvs_id_util; - #endif /* __L2TPNS_H__ */