X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/90f31e7f7188cd1a6ce58c4cc7d31bf7005a239c..ffb34a8a9891e625cccebd7ec3454567ed5d94cd:/l2tpns.h?ds=inline diff --git a/l2tpns.h b/l2tpns.h index 7df1cc6..a50dc55 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,5 +1,5 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.28 2004/11/03 13:23:59 bodea Exp $ +// $Id: l2tpns.h,v 1.103 2005/12/06 00:00:32 bodea Exp $ #ifndef __L2TPNS_H__ #define __L2TPNS_H__ @@ -15,23 +15,29 @@ #include #include -#define VERSION "2.0.3" +#define VERSION "2.1.13" // Limits #define MAXTUNNEL 500 // could be up to 65535 -#define MAXSESSION 50000 // could be up to 65535 +#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) +#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 MINMTU 576 // minimum recommended MTU (rfc1063) +#define PPPMTU 1500 // default PPP MTU +#define MAXMTU 2600 // arbitrary maximum MTU +#define MAXETHER (MAXMTU+18) // max packet we try sending to tun #define MAXTEL 96 // telephone number +#define MAXUSER 128 // username +#define MAXPASS 128 // password #define MAXPLUGINS 20 // maximum number of plugins to load #define MAXRADSERVER 10 // max radius servers #define MAXROUTE 10 // max static routes per session @@ -51,10 +57,6 @@ #define LIBDIR "/usr/lib/l2tpns" #endif -#ifndef STATEDIR -#define STATEDIR "/var/lib/l2tpns" -#endif - #ifndef PLUGINDIR #define PLUGINDIR LIBDIR // Plugins #endif @@ -67,31 +69,31 @@ #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 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, @@ -106,24 +108,89 @@ 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 + +// 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 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; + int filter_out; }; #define CLI_SESS_KILL 0x01 @@ -131,6 +198,8 @@ struct cli_session_actions { #define CLI_SESS_NOSNOOP 0x04 #define CLI_SESS_THROTTLE 0x08 #define CLI_SESS_NOTHROTTLE 0x10 +#define CLI_SESS_FILTER 0x20 +#define CLI_SESS_NOFILTER 0x40 struct cli_tunnel_actions { char action; @@ -138,123 +207,162 @@ 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 routes // route +typedef struct // route { - ipt ip; - ipt mask; + in_addr_t ip; + in_addr_t mask; } 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 + uint8_t buf[MAXCONTROL]; } controlt; -typedef struct sessions +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; + char reserved_1[2]; // unused: padding + 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 + char reserved_2[4]; // unused: was ns/nr + 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 mru; // maximum receive unit clockt opened; // when started clockt die; // being closed, when to finally free time_t last_packet; // Last packet from the user (used for idle timeouts) - ipt dns1, dns2; // DNS servers + 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 seesion 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. - char reserved[20]; // Space to expand structure without changing HB_VERSION + uint32_t tx_connect_speed; + uint32_t rx_connect_speed; + in_addr_t snoop_ip; // Interception destination IP + uint16_t snoop_port; // Interception destination port + uint8_t walled_garden; // is this session gardened? + uint8_t ipv6prefixlen; // IPv6 route prefix length + struct in6_addr ipv6route; // Static IPv6 route + char reserved_3[11]; // Space to expand structure without changing HB_VERSION } sessiont; -#define SF_IPCP_ACKED (1<<0) // Has this session seen an IPCP Ack? +#define AUTHPAP 1 // allow PAP +#define AUTHCHAP 2 // allow CHAP + +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; + + // DoS prevention + clockt last_packet_out; + uint32_t packets_out; + uint32_t packets_dropped; -typedef struct { - u32 cin; - u32 cout; -} sessioncountt; + // RADIUS session in use + uint16_t radius; -#define SESSIONPFC 1 // PFC negotiated flags -#define SESSIONACFC 2 // ACFC negotiated flags -#define SESSIONLCPACK 4 // LCP negotiated + // interim RADIUS + time_t last_interim; + + // last LCP Echo + time_t last_echo; +} 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 // 168 bytes per tunnel -typedef struct tunnels +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 } tunnelt; -// 180 bytes per radius session -typedef struct radiuss // outstanding RADIUS requests +// 160 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) } 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 @@ -269,7 +377,6 @@ struct Tringbuffer char level; sessionidt session; tunnelidt tunnel; - ipt address; char message[MAX_LOG_LENGTH]; } buffer[RINGBUFFER_SIZE]; int head; @@ -295,87 +402,98 @@ 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. }; 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 @@ -392,7 +510,7 @@ struct Tstats #define SET_STAT(x, y) #endif -struct configt +typedef struct { int debug; // debugging level time_t start_time; // time when l2tpns was started @@ -405,28 +523,43 @@ struct configt 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 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 + + uint16_t radius_dae_port; // local port for radius dae - ipt default_dns1, default_dns2; + 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 + + 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; + 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; @@ -435,16 +568,18 @@ struct configt 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 - 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). @@ -453,128 +588,180 @@ struct configt int cluster_highest_sessionid; 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. #ifdef BGP - u16 as_number; - char bgp_peer[2][64]; - u16 bgp_peer_as[2]; +#define BGP_NUM_PEERS 2 + uint16_t as_number; + struct { + char name[64]; + uint16_t as; + int keepalive; + int hold; + } neighbour[BGP_NUM_PEERS]; #endif -}; +} configt; -struct config_descriptt +enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6 }; +typedef struct { char *key; int offset; int size; - enum { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC } type; -}; + enum config_typet type; +} config_descriptt; + +typedef struct +{ + 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 + uint16_t port; // port (host byte order) + uint16_t port2; // range +} ip_filter_portt; + +typedef struct +{ + int action; // permit/deny +#define FILTER_ACTION_DENY 1 +#define FILTER_ACTION_PERMIT 2 + 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; + in_addr_t dst_ip; // dest ip + in_addr_t dst_wild; + ip_filter_portt dst_ports; + 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 + 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 +#define TCP_FLAG_SYN 0x02 +#define TCP_FLAG_RST 0x04 +#define TCP_FLAG_PSH 0x08 +#define TCP_FLAG_ACK 0x10 +#define TCP_FLAG_URG 0x20 + +#define MAXFILTER 32 +#define MAXFILTER_RULES 32 +typedef struct +{ + char name[32]; // ACL name + int extended; // type: 0 = standard, 1 = extended + ip_filter_rulet rules[MAXFILTER_RULES]; + int used; // session ref count +} ip_filtert; // 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); -u8 *findppp(u8 * b, u8 mtype); -void initlcp(tunnelidt t, sessionidt s); -void dumplcp(u8 *p, int l); +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 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 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); +void sendlcp(sessionidt s, tunnelidt t); +void send_ipin(sessionidt s, uint8_t *buf, int len); +void sendccp(sessionidt s, tunnelidt t); // 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); // l2tpns.c -clockt now(void); -clockt backoff(u8 try); -void routeset(sessionidt, ipt ip, ipt mask, ipt gw, u8 add); -void inittun(void); -void initudp(void); -void initdata(int optdebug, char *optconfig); -void initippool(); -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 sessionsendarp(sessionidt s); -void send_garp(ipt ip); +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 control16(controlt * c, u16 avp, u16 val, u8 m); -void control32(controlt * c, u16 avp, u32 val, u8 m); -void controls(controlt * c, u16 avp, char *val, u8 m); -void controlb(controlt * c, u16 avp, char *val, unsigned int len, u8 m); -controlt *controlnew(u16 mtype); -void controlnull(tunnelidt t); -void controladd(controlt * c, tunnelidt t, sessionidt s); -void tunnelsend(u8 * buf, u16 l, tunnelidt t); -void tunnelkill(tunnelidt t, char *reason); -void tunnelshutdown(tunnelidt t, char *reason); -void sendipcp(tunnelidt t, sessionidt s); -void processipout(u8 * buf, int len); -void processarp(u8 * buf, int len); -void processudp(u8 * buf, int len, struct sockaddr_in *addr); -void processtun(u8 * buf, int len); -void processcontrol(u8 * buf, int len, struct sockaddr_in *addr); -int assign_ip_address(sessionidt s); -void free_ip_address(sessionidt s); -void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port); -void dump_acct_info(); -void mainloop(void); +void sessionshutdown(sessionidt s, char *reason, int result, int error); +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 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); -#undef log -#undef log_hex -#define log(D, a, s, t, f, ...) ({ if (D <= config->debug) _log(D, a, s, t, f, ## __VA_ARGS__); }) -#define log_hex(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); }) +#undef LOG +#undef LOG_HEX +#define LOG(D, s, t, f, ...) ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); }) +#define LOG_HEX(D, t, d, s) ({ if (D <= config->debug) _log_hex(D, t, d, s); }) -void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 5, 6))); -void _log_hex(int level, const char *title, const char *data, int maxsize); +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 uint8_t *data, int maxsize); -void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response); -int sessionsetup(tunnelidt t, sessionidt s); -int cluster_send_session(int s); -int cluster_send_tunnel(int t); -int cluster_send_goodbye(); -void init_cli(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, ...); -#ifdef RINGBUFFER -void ringbuffer_dump(FILE *stream); -#endif -void initplugins(void); +int sessionsetup(sessionidt s, tunnelidt t); int run_plugins(int plugin_type, void *data); -void add_plugin(char *plugin_name); -void remove_plugin(char *plugin_name); -void plugins_done(void); -void tunnelclear(tunnelidt t); -void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len); -void fix_address_pool(int sid); void rebuild_address_pool(void); -void send_ipin(sessionidt s, u8 * buf, int len); void throttle_session(sessionidt s, int rate_in, int rate_out); int load_session(sessionidt, sessiont *); void become_master(void); // We're the master; kick off any required master initializations. + + +// cli.c +void init_cli(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(in_addr_t destination, uint16_t id, in_addr_t source, uint8_t *packet, int packet_len); + + extern tunnelt *tunnel; extern sessiont *session; -extern sessioncountt *sess_count; +extern sessionlocalt *sess_local; extern ippoolt *ip_address_pool; #define sessionfree (session[0].next) @@ -583,29 +770,46 @@ if (count++ < max) { \ void *array[20]; \ char **strings; \ int size, i; \ - log(0, 0, 0, t, "Backtrace follows"); \ + LOG(0, 0, t, "Backtrace follows:\n"); \ size = backtrace(array, 10); \ strings = backtrace_symbols(array, size); \ if (strings) for (i = 0; i < size; i++) \ { \ - log(0, 0, 0, t, "%s\n", strings[i]); \ + LOG(0, 0, t, " %s\n", strings[i]); \ } \ free(strings); \ } -extern struct configt *config; +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, + } 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)