X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/53f1a814a14f348ecf1405d406303e1125205504..ffb34a8a9891e625cccebd7ec3454567ed5d94cd:/l2tpns.h diff --git a/l2tpns.h b/l2tpns.h index 3d19b8f..a50dc55 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,5 +1,5 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.85 2005/08/29 06:17:53 bodea Exp $ +// $Id: l2tpns.h,v 1.103 2005/12/06 00:00:32 bodea Exp $ #ifndef __L2TPNS_H__ #define __L2TPNS_H__ @@ -15,7 +15,7 @@ #include #include -#define VERSION "2.1.4" +#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 @@ -146,7 +148,14 @@ enum { // reset state machine counters #define initialise_restart_count(_s, _fsm) \ - sess_local[_s]._fsm.conf_sent = sess_local[_s]._fsm.nak_sent + 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) ({ \ @@ -219,20 +228,19 @@ 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; // 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; + 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 uint32_t unique_id; // unique session id - uint16_t nr; // next receive - uint16_t ns; // next send + 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 @@ -262,7 +270,7 @@ 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[11]; // Space to expand structure without changing HB_VERSION + char reserved_3[11]; // Space to expand structure without changing HB_VERSION } sessiont; @@ -286,9 +294,15 @@ typedef struct 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; @@ -299,10 +313,15 @@ 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 @@ -315,7 +334,7 @@ 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 @@ -508,7 +527,9 @@ 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 @@ -570,6 +591,7 @@ 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 @@ -592,7 +614,7 @@ typedef struct #endif } configt; -enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6, MAC }; +enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6 }; typedef struct { char *key; @@ -698,6 +720,8 @@ 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); @@ -764,7 +788,6 @@ 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; @@ -784,6 +807,9 @@ 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)