X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/32e5db59062efd8e40d0d5360bab479ef838ebef..c239d4b22829335fda98b66ce045a3f624436eeb:/l2tpns.h diff --git a/l2tpns.h b/l2tpns.h index 3d85ce6..653364c 100644 --- a/l2tpns.h +++ b/l2tpns.h @@ -1,16 +1,35 @@ // L2TPNS Global Stuff -// $Id: l2tpns.h,v 1.4 2004-04-16 02:33:32 fred_nerk Exp $ +// $Id: l2tpns.h,v 1.7 2004-06-23 03:52:24 fred_nerk Exp $ + +#ifndef __L2TPNS_H__ +#define __L2TPNS_H__ #include +#include #include +#include +#include +#include +#include +#include +#include +#include #include "config.h" -#define VERSION "1.1.2" +#define VERSION "2.0.0" // Limits #define MAXTUNNEL 500 // could be up to 65535 #define MAXSESSION 50000 // could be up to 65535 -#define MAXRADIUS 255 +#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 ((2 << (RADIUS_SHIFT - 1)) * 255) + +#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 tap #define MAXTEL 96 // telephone number @@ -24,20 +43,28 @@ #define IDLE_TIMEOUT 240 // Time between last packet sent and LCP ECHO generation // Constants -#define STATISTICS -#define STAT_CALLS -#define RINGBUFFER +#ifndef PLUGINDIR +#define PLUGINDIR LIBDIR // Plugins +#endif + +#ifndef PLUGINCONF +#define PLUGINCONF ETCDIR // Plugin config dir +#endif + +#ifndef DATADIR +#define DATADIR "/tmp" +#endif + +#ifndef FLASHDIR +#define FLASHDIR ETCDIR +#endif + #define TAPDEVICE "/dev/net/tun" #define UDP 17 -#define HOMEDIR "/home/l2tpns/" // Base dir for data -#define STATEFILE "/tmp/l2tpns.dump" // State dump file -#define NOSTATEFILE "/tmp/l2tpns.no_state_reload" // If exists, state will not be reloaded -#define CONFIGFILE ETCDIR "/l2tpns.cfg" // Configuration file -#define CLIUSERS ETCDIR "/l2tpns.users" // CLI Users file -#define IPPOOLFILE ETCDIR "/l2tpns.ip_pool" // Address pool configuration -#ifndef LIBDIR -#define LIBDIR "/usr/lib/l2tpns" -#endif +#define STATEFILE DATADIR "/state.dump" // State dump file +#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... @@ -52,6 +79,7 @@ #define PPPCCP 0x80FD #define PPPIP 0x0021 #define PPPMP 0x003D +#define MIN_IP_SIZE 0x19 enum { ConfigReq = 1, @@ -97,22 +125,13 @@ typedef struct controls // control message } controlt; -typedef struct stbft -{ - struct stbft *next; - char handle[10]; - char in_use; - int mark; -} tbft; - - // 336 bytes per session typedef struct sessions { sessionidt next; // next session in linked list sessionidt far; // far end session ID tunnelidt tunnel; // tunnel ID - ipt ip; // IP of session set by RADIUS response + ipt ip; // IP of session set by RADIUS response (host byte order). int ip_pool_index; // index to IP pool unsigned long sid; // session id for hsddb u16 nr; // next receive @@ -123,28 +142,40 @@ typedef struct sessions 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 + u32 throttle; // non-zero if this session is throttled. 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 routet route[MAXROUTE]; // static routes - u8 radius; // which radius session is being used (0 for not waiting on authentication) - u8 flags; // various bit flags - u8 snoop; // are we snooping this session? - u8 throttle; // is this session throttled? - u8 walled_garden; // is this session gardened? + u16 radius; // which radius session is being used (0 for not waiting on authentication) u16 mru; // maximum receive unit - u16 tbf; // filter bucket for throttling + 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 walled_garden; // is this session gardened? + u8 flags1; // additional flags (currently unused); char random_vector[MAXTEL]; int random_vector_length; - char user[129]; // user (needed in seesion for radius stop messages) + char user[129]; // user (needed in seesion for radius stop messages) (can we reduce this? --mo) char called[MAXTEL]; // called number char calling[MAXTEL]; // calling number - unsigned long tx_connect_speed; - unsigned long rx_connect_speed; + 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 + char reserved[28]; // Space to expand structure without changing HB_VERSION } sessiont; +#define SF_IPCP_ACKED (1<<0) // Has this session seen an IPCP Ack? + +typedef struct { + u32 cin; + u32 cout; +} sessioncountt; + #define SESSIONPFC 1 // PFC negotiated flags #define SESSIONACFC 2 // ACFC negotiated flags @@ -172,26 +203,27 @@ typedef struct tunnels tunnelt; // 180 bytes per radius session -typedef struct radiuss // outstanding RADIUS requests +typedef struct radiuss // 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) + 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) } radiust; typedef struct { - ipt address; - char assigned; // 1 if assigned, 0 if free - clockt last; // last used - char user[129]; // user (try to have ip addresses persistent) + ipt address; // Host byte order.. + char assigned; // 1 if assigned, 0 if free + sessionidt session; + clockt last; // last used + char user[129]; // user (try to have ip addresses persistent) } ippoolt; @@ -219,7 +251,8 @@ enum TUNNELFREE, // Not in use TUNNELOPEN, // Active tunnel TUNNELDIE, // Currently closing - TUNNELOPENING // Busy opening + TUNNELOPENING, // Busy opening + TUNNELUNDEF, // Undefined }; enum @@ -230,7 +263,8 @@ enum RADIUSIPCP, // sending IPCP to end user RADIUSSTART, // sending start accounting to RADIUS server RADIUSSTOP, // sending stop accounting to RADIUS server - RADIUSWAIT // waiting timeout before available, in case delayed replies + RADIUSWAIT, // waiting timeout before available, in case delayed replies + RADIUSDEAD, // errored while talking to radius server. }; struct Tstats @@ -274,6 +308,9 @@ struct Tstats unsigned long ip_allocated; unsigned long ip_freed; + + unsigned long c_forwarded; + unsigned long recv_forward; #ifdef STAT_CALLS unsigned long call_processtap; unsigned long call_processarp; @@ -322,9 +359,12 @@ struct configt int debug; // debugging level time_t start_time; // time when l2tpns was started char bandwidth[256]; // current bandwidth + clockt current_time; 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 tapdevice[10]; // tap device name char log_filename[128]; @@ -334,22 +374,47 @@ struct configt int radius_accounting; ipt radiusserver[MAXRADSERVER]; // radius servers u8 numradiusservers; // radius server count + short num_radfds; // Number of radius filehandles allocated ipt default_dns1, default_dns2; - ipt snoop_destination_host; - u16 snoop_destination_port; - unsigned long rl_rate; int save_state; - uint32_t cluster_address; - int ignore_cluster_updates; char accounting_dir[128]; ipt bind_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 1, will force scheduler to use SCHED_FIFO. + // Don't use this unless you have a dual processor machine! + int icmp_rate; // Max number of ICMP unreachable per second to send + + u32 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. + // 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_tunnels; // How many tunnels we're yet to receive from the master. + int cluster_highest_sessionid; + int cluster_highest_tunnelid; + clockt cluster_last_hb; // Last time we saw a heartbeat from the master. + int cluster_num_changes; // Number of changes queued. + +#ifdef BGP + u16 as_number; + char bgp_peer[2][64]; + u16 bgp_peer_as[2]; +#endif }; struct config_descriptt @@ -372,19 +437,19 @@ 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, u8 * p, int l, tunnelidt t, sessionidt s, u16 mtype); +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(char *p, int l); +void dumplcp(u8 *p, int l); // radius.c void initrad(void); -void radiussend(u8 r, u8 state); -void processrad(u8 *buf, int len); -void radiusretry(u8 r); -u8 radiusnew(sessionidt s); -void radiusclear(u8 r, sessionidt s); +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); // throttle.c int throttle_session(sessionidt s, int throttle); @@ -401,7 +466,7 @@ void rl_destroy_tbf(u16 t); // l2tpns.c clockt now(void); clockt backoff(u8 try); -void routeset(ipt ip, ipt mask, ipt gw, u8 add); +void routeset(sessionidt, ipt ip, ipt mask, ipt gw, u8 add); void inittap(void); void initudp(void); void initdata(void); @@ -430,17 +495,21 @@ void processtap(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); +void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port); void dump_acct_info(); void mainloop(void); +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); + #define log _log #ifndef log_hex #define log_hex(a,b,c,d) do{if (a <= config->debug) _log_hex(a,0,0,0,b,c,d);}while (0) #endif -void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...); +void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 5, 6))); void _log_hex(int level, ipt address, sessionidt s, tunnelidt t, const char *title, const char *data, int maxsize); void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response); -int sessionsetup(tunnelidt t, sessionidt s, u8 routes); +int sessionsetup(tunnelidt t, sessionidt s); int cluster_send_session(int s); int cluster_send_tunnel(int t); int cluster_send_goodbye(); @@ -450,13 +519,46 @@ void cli_do(int sockfd); #ifdef RINGBUFFER void ringbuffer_dump(FILE *stream); #endif -void initplugins(); +void initplugins(void); 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); +int throttle_session(sessionidt s, int throttle); +int load_session(sessionidt, sessiont *); +void become_master(void); // We're the master; kick off any required master initializations. extern tunnelt *tunnel; extern sessiont *session; +extern sessioncountt *sess_count; +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, 0, t, "Backtrace follows"); \ + 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]); \ + } \ + free(strings); \ +} + + +extern struct configt *config; +extern time_t basetime; // Time when this process started. +extern time_t time_now; // Seconds since EPOCH. +extern u32 last_sid; +extern struct Tstats *_statistics; +extern ipt my_address; +extern int tun_write(u8 *data, int size); +#endif /* __L2TPNS_H__ */