X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/9cb7003d3390c34d3f01bb10fe5542d433ae99de..686d880172e3038a7dfd8ea81c7c05539a5ad18a:/l2tpns.h diff --git a/l2tpns.h b/l2tpns.h index ee5fe4a..77936b3 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,5 +1,5 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.50 2004/12/18 01:20:05 bodea Exp $ +// $Id: l2tpns.h,v 1.68 2005/05/08 07:13:56 bodea Exp $ #ifndef __L2TPNS_H__ #define __L2TPNS_H__ @@ -19,7 +19,7 @@ // 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 @@ -32,6 +32,8 @@ #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 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 @@ -41,6 +43,7 @@ #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 1458 // maximum packet size to avoid fragmentation when LNS ethernet MTU is 1500 // Constants #ifndef ETCDIR @@ -51,10 +54,6 @@ #define LIBDIR "/usr/lib/l2tpns" #endif -#ifndef STATEDIR -#define STATEDIR "/var/lib/l2tpns" -#endif - #ifndef PLUGINDIR #define PLUGINDIR LIBDIR // Plugins #endif @@ -67,12 +66,8 @@ #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 @@ -93,8 +88,8 @@ #define PPPIPV6 0x0057 #define PPPMP 0x003D #define MIN_IP_SIZE 0x19 -enum -{ + +enum { ConfigReq = 1, ConfigAck, ConfigNak, @@ -109,6 +104,15 @@ enum IdentRequest }; +enum { + AccessRequest = 1, + AccessAccept, + AccessReject, + AccountingRequest, + AccountingResponse, + AccessChallenge = 11 +}; + // Types typedef uint16_t sessionidt; typedef uint16_t tunnelidt; @@ -140,9 +144,6 @@ 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 { @@ -164,9 +165,11 @@ 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. 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 + uint32_t unique_id; // unique session id uint16_t nr; // next receive uint16_t ns; // next send uint32_t magic; // ppp magic number @@ -174,36 +177,31 @@ typedef struct uint32_t pin, pout; // packet counts uint32_t total_cin; // This counter is never reset while a session is open uint32_t total_cout; // This counter is never reset while a session is open - uint32_t id; // session id 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) in_addr_t dns1, dns2; // DNS servers routet route[MAXROUTE]; // static routes - uint16_t radius; // which radius session is being used (0 for not waiting on authentication) - uint16_t mru; // maximum receive unit uint16_t tbf_in; // filter bucket for throttling in from the user. uint16_t tbf_out; // filter bucket for throttling out to the user. - uint8_t l2tp_flags; // various bit flags from the ICCN on the l2tp tunnel. - uint8_t reserved_old_snoop; // No longer used - remove at some time - uint8_t walled_garden; // is this session gardened? - uint8_t flags1; // additional flags (currently unused); - char random_vector[MAXTEL]; int random_vector_length; - char user[129]; // user (needed in seesion for radius stop messages) (can we reduce this? --mo) + char random_vector[MAXTEL]; + char user[MAXUSER]; // user (needed in seesion for radius stop messages) char called[MAXTEL]; // called number char calling[MAXTEL]; // calling number uint32_t tx_connect_speed; uint32_t rx_connect_speed; - uint32_t flags; // Various session flags. in_addr_t snoop_ip; // Interception destination IP uint16_t snoop_port; // Interception destination port - uint16_t sid; // near end session id. - uint8_t filter_in; // input filter index (to ip_filters[N-1]; 0 if none) - uint8_t filter_out; // output filter index - char reserved[18]; // Space to expand structure without changing HB_VERSION + uint8_t walled_garden; // is this session gardened? + uint8_t ipv6prefixlen; // IPv6 route prefix length + struct in6_addr ipv6route; // Static IPv6 route + char reserved[24]; // Space to expand structure without changing HB_VERSION } sessiont; @@ -212,12 +210,28 @@ sessiont; #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 typedef struct { + // byte counters uint32_t cin; uint32_t cout; -} sessioncountt; + + // 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; +} sessionlocalt; #define SESSIONPFC 1 // PFC negotiated flags #define SESSIONACFC 2 // ACFC negotiated flags @@ -305,8 +319,8 @@ enum 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 @@ -320,6 +334,7 @@ struct Tstats 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; @@ -357,11 +372,14 @@ struct Tstats #ifdef STATISTICS 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_processipv6cp; uint32_t call_tunnelsend; uint32_t call_sessionkill; uint32_t call_sessionshutdown; @@ -376,18 +394,20 @@ struct Tstats 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 @@ -424,19 +444,25 @@ typedef struct char log_filename[128]; char l2tpsecret[64]; + char random_device[256]; // random device path, defaults to RANDOMDEVICE + char radiussecret[64]; int radius_accounting; + int radius_interim; in_addr_t radiusserver[MAXRADSERVER]; // radius servers uint16_t radiusport[MAXRADSERVER]; // radius base ports uint8_t numradiusservers; // radius server count short num_radfds; // Number of radius filehandles allocated + char radius_authtypes_s[32]; // list of valid authentication types (chap, pap) in order of preference + int radius_authtypes; + int radius_authprefer; + 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]; in_addr_t bind_address; in_addr_t peer_address; @@ -450,7 +476,8 @@ typedef struct 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 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 in_addr_t cluster_address; // Multicast address of cluster. // Send to this address to have everyone hear. @@ -472,6 +499,8 @@ typedef struct 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. + #ifdef BGP #define BGP_NUM_PEERS 2 uint16_t as_number; @@ -554,11 +583,13 @@ 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 initlcp(tunnelidt t, sessionidt s); +void sendlcp(tunnelidt t, sessionidt s, int authtype); void send_ipin(sessionidt s, uint8_t *buf, int len); @@ -573,9 +604,14 @@ void radiusclear(uint16_t r, sessionidt s); // l2tpns.c clockt backoff(uint8_t try); +void send_ipv6_ra(tunnelidt t, sessionidt s, 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 random_data(uint8_t *buf, int len); +void sessionkill(sessionidt s, char *reason); +void sessionshutdown(sessionidt s, char *reason, int result, int error); void send_garp(in_addr_t ip); void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t); void sendipcp(tunnelidt t, sessionidt s); @@ -615,7 +651,7 @@ void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, char extern tunnelt *tunnel; extern sessiont *session; -extern sessioncountt *sess_count; +extern sessionlocalt *sess_local; extern ippoolt *ip_address_pool; #define sessionfree (session[0].next)