X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/4f253feef08f01c03bc63f70f9de3937541ccd79..d1789f28d01f55dd54ec9b9fcd217cd6a52c99bd:/l2tpns.h?ds=inline diff --git a/l2tpns.h b/l2tpns.h index 03619a4..32bfaf6 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,5 +1,5 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.80 2005/06/28 14:48:27 bodea Exp $ +// $Id: l2tpns.h,v 1.100 2005/11/25 02:18:40 bodea Exp $ #ifndef __L2TPNS_H__ #define __L2TPNS_H__ @@ -15,7 +15,7 @@ #include #include -#define VERSION "2.1.2" +#define VERSION "2.1.13" // Limits #define MAXTUNNEL 500 // could be up to 65535 @@ -31,7 +31,10 @@ #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 @@ -44,7 +47,6 @@ #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 BUSY_WAIT_TIME 3000 // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown -#define DEFAULT_MRU 1452 // maximum packet size to avoid fragmentation when LNS ethernet MTU is 1500 // Constants #ifndef ETCDIR @@ -72,14 +74,14 @@ #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 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 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 @@ -121,6 +123,59 @@ enum { 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 uint16_t sessionidt; typedef uint16_t tunnelidt; @@ -173,8 +228,15 @@ typedef struct sessionidt next; // next session in linked list sessionidt far; // far end session ID tunnelidt tunnel; // near end tunnel ID - uint8_t l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel. - uint8_t flags; // Various session flags. + 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 + uint8_t pad; // unused + } ppp; in_addr_t ip; // IP of session set by RADIUS response (host byte order). int ip_pool_index; // index to IP pool uint32_t unique_id; // unique session id @@ -198,7 +260,7 @@ typedef struct 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 random_vector[MAXTEL]; + 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 @@ -209,17 +271,10 @@ typedef struct uint8_t walled_garden; // is this session gardened? uint8_t ipv6prefixlen; // IPv6 route prefix length struct in6_addr ipv6route; // Static IPv6 route - char reserved[16]; // Space to expand structure without changing HB_VERSION + char reserved[11]; // Space to expand structure without changing HB_VERSION } 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 -#define SF_IPV6CP_ACKED 8 // IPv6 negotiated -#define SF_IPV6_NACKED 16 // IPv6 rejected -#define SF_IPV6_ROUTED 32 // advertised v6 route - #define AUTHPAP 1 // allow PAP #define AUTHCHAP 2 // allow CHAP @@ -233,6 +288,22 @@ typedef struct 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; @@ -243,10 +314,15 @@ typedef struct // interim RADIUS time_t last_interim; + + // last LCP Echo + time_t last_echo; } sessionlocalt; -#define SESSIONPFC 1 // PFC negotiated flags -#define SESSIONACFC 2 // ACFC negotiated flags +// 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 @@ -259,7 +335,7 @@ typedef struct 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 @@ -271,13 +347,12 @@ typedef struct } tunnelt; -// 180 bytes per radius session +// 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 uint8_t id; // ID for PPP response uint8_t try; // which try we are on @@ -328,7 +403,6 @@ 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 @@ -391,6 +465,7 @@ struct Tstats 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; @@ -453,10 +528,16 @@ typedef struct 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; int radius_interim; @@ -511,6 +592,7 @@ typedef struct 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 @@ -599,18 +681,20 @@ void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip); // ppp.c -void processpap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void processchap(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void processlcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void processipcp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void processipv6cp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void processipin(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void processipv6in(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void processccp(tunnelidt t, sessionidt s, uint8_t *p, uint16_t l); -void sendchap(tunnelidt t, sessionidt s); -uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, tunnelidt t, sessionidt s, uint16_t mtype); -void sendlcp(tunnelidt t, sessionidt s, int authtype); +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 @@ -625,7 +709,7 @@ void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen); // l2tpns.c clockt backoff(uint8_t try); -void send_ipv6_ra(tunnelidt t, sessionidt s, struct in6_addr *ip); +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); @@ -637,9 +721,12 @@ 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); -void sendipcp(tunnelidt t, sessionidt s); +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(char *packet, uint16_t size, in_addr_t destination, uint16_t port); +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); @@ -652,9 +739,9 @@ 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); @@ -670,7 +757,7 @@ 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, 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; @@ -702,7 +789,6 @@ extern char main_quit; extern uint32_t last_id; extern struct Tstats *_statistics; extern in_addr_t my_address; -extern int tun_write(uint8_t *data, int size); extern int clifd; extern int epollfd; @@ -722,6 +808,9 @@ struct event_data { #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)