X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/8e8ea0e534b2783d65ca88f890ef4200a6f3f3a6..9eb3125681d5884a455a3eaf37f0115a63ff4b36:/l2tpns.h?ds=sidebyside

diff --git a/l2tpns.h b/l2tpns.h
index e485303..d84be52 100644
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,18 +1,36 @@
 // L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.3 2004/03/05 00:22:06 fred_nerk Exp $
+// $Id: l2tpns.h,v 1.24 2004/10/29 04:01:11 bodea Exp $
+
+#ifndef __L2TPNS_H__
+#define __L2TPNS_H__
 
 #include <netinet/in.h>
+#include <execinfo.h>
 #include <stdio.h>
-#include "config.h"
+#include <signal.h>
+#include <stdlib.h>
+#include <netinet/in.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <sys/types.h>
+#include <libcli.h>
 
-#define VERSION	"1.1.0"
+#define VERSION	"2.0.2"
 
 // 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	((unsigned long)(1L << RADIUS_SHIFT) * 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	MAXETHER	(1500+18)	// max packet we try sending to tun
 #define	MAXTEL		96		// telephone number
 #define MAXPLUGINS	20		// maximum number of plugins to load
 #define MAXRADSERVER	10		// max radius servers
@@ -22,26 +40,45 @@
 #define MAX_LOG_LENGTH	512		// Maximum size of log message
 #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_TIMEOUT	3000	// 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
 
 // Constants
-#define STATISTICS
-#define STAT_CALLS
-#define RINGBUFFER
-#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 ETCDIR
+#define ETCDIR		"/etc/l2tpns"
+#endif
+
 #ifndef LIBDIR
 #define LIBDIR		"/usr/lib/l2tpns"
 #endif
+
+#ifndef STATEDIR
+#define STATEDIR	"/var/lib/l2tpns"
+#endif
+
+#ifndef PLUGINDIR
+#define PLUGINDIR	LIBDIR		// Plugins
+#endif
+
+#ifndef PLUGINCONF
+#define PLUGINCONF	ETCDIR		// Plugin config dir
+#endif
+
+#ifndef FLASHDIR
+#define FLASHDIR	ETCDIR
+#endif
+
+#ifndef DATADIR
+#define DATADIR		STATEDIR
+#endif
+
+#define TUNDEVICE	"/dev/net/tun"
+#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...
-#define	RADAPORT	1646		// old radius accounting port
 #define	PKTARP		0x0806		// ARP packet type
 #define	PKTIP		0x0800		// IP packet type
 #define PSEUDOMAC	0x0200		// pseudo MAC prefix (local significant MAC)
@@ -52,6 +89,7 @@
 #define	PPPCCP		0x80FD
 #define PPPIP		0x0021
 #define PPPMP		0x003D
+#define MIN_IP_SIZE	0x19
 enum
 {
 	ConfigReq = 1,
@@ -64,7 +102,8 @@ enum
 	ProtocolRej,
 	EchoReq,
 	EchoReply,
-	DiscardRequest
+	DiscardRequest,
+	IdentRequest
 };
 
 // Types
@@ -78,6 +117,26 @@ typedef u16 tunnelidt;
 typedef u32 clockt;
 typedef u8 hasht[16];
 
+// CLI actions
+struct cli_session_actions {
+	char action;
+	ipt snoop_ip;
+	u16 snoop_port;
+	int throttle;
+};
+
+#define CLI_SESS_KILL		0x01
+#define CLI_SESS_SNOOP		0x02
+#define CLI_SESS_NOSNOOP	0x04
+#define CLI_SESS_THROTTLE	0x08
+#define CLI_SESS_NOTHROTTLE	0x10
+
+struct cli_tunnel_actions {
+	char action;
+};
+
+#define CLI_TUN_KILL		0x01
+
 // dump header: update number if internal format changes
 #define DUMP_MAGIC "L2TPNS#" VERSION "#"
 
@@ -97,24 +156,14 @@ 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
+	tunnelidt tunnel;		// near end tunnel ID
+	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
+	unsigned long unique_id;	// unique session id
 	u16 nr;				// next receive
 	u16 ns;				// next send
 	u32 magic;			// ppp magic number
@@ -123,30 +172,45 @@ 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 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];
 	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
+	u16 sid;			// near end session id.
+	char reserved[20];		// 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
+#define SESSIONLCPACK	4	// LCP negotiated
 
 // 168 bytes per tunnel
 typedef struct tunnels
@@ -172,26 +236,27 @@ 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 +284,8 @@ enum
 	TUNNELFREE,		// Not in use
 	TUNNELOPEN,		// Active tunnel
 	TUNNELDIE,		// Currently closing
-	TUNNELOPENING		// Busy opening
+	TUNNELOPENING,		// Busy opening
+	TUNNELUNDEF,		// Undefined
 };
 
 enum
@@ -230,7 +296,8 @@ 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
@@ -238,12 +305,12 @@ struct Tstats
     time_t		start_time;
     time_t		last_reset;
 
-    unsigned long	tap_rx_packets;
-    unsigned long	tap_tx_packets;
-    unsigned long	tap_rx_bytes;
-    unsigned long	tap_tx_bytes;
-    unsigned long	tap_rx_errors;
-    unsigned long	tap_tx_errors;
+    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;
@@ -255,11 +322,7 @@ struct Tstats
     unsigned long	tunnel_retries;
     unsigned long	radius_retries;
 
-    unsigned long	arp_errors;
-    unsigned long	arp_replies;
-    unsigned long	arp_discarded;
     unsigned long	arp_sent;
-    unsigned long	arp_recv;
 
     unsigned long	packets_snooped;
 
@@ -274,9 +337,11 @@ struct Tstats
 
     unsigned long	ip_allocated;
     unsigned long	ip_freed;
-#ifdef STAT_CALLS
-    unsigned long	call_processtap;
-    unsigned long	call_processarp;
+
+    unsigned long	c_forwarded;
+    unsigned long	recv_forward;
+#ifdef STATISTICS
+    unsigned long	call_processtun;
     unsigned long	call_processipout;
     unsigned long	call_processudp;
     unsigned long	call_sessionbyip;
@@ -306,11 +371,19 @@ struct Tstats
 };
 
 #ifdef STATISTICS
-#define STAT(x)		_statistics->x++
-#define INC_STAT(x,y)	_statistics->x += y
-#define GET_STAT(x)	_statistics->x
-#define SET_STAT(x, y)	_statistics->x = y
+
+#ifdef STAT_CALLS
+#define CSTAT(x)	STAT(x)
+#else
+#define CSTAT(x)
+#endif
+
+#define STAT(x)		(_statistics->x++)
+#define INC_STAT(x,y)	(_statistics->x += (y))
+#define GET_STAT(x)	(_statistics->x)
+#define SET_STAT(x, y)	(_statistics->x = (y))
 #else
+#define CSTAT(x)
 #define STAT(x)
 #define INC_STAT(x,y)
 #define GET_STAT(x)	0
@@ -322,34 +395,72 @@ struct configt
 	int		debug;				// debugging level
 	time_t		start_time;			// time when l2tpns was started
 	char		bandwidth[256];			// current bandwidth
+	char		pid_file[256];			// file to write PID to on startup
+	int		wrote_pid;
+	clockt		current_time;			// 1/10ths of a second since the process started.
+							// means that we can only run a given process
+							// for 13 years without re-starting!
 
 	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		tundevice[10];			// tun device name
 	char		log_filename[128];
 	char		l2tpsecret[64];
 
 	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
 
 	ipt		default_dns1, default_dns2;
 
-	ipt		snoop_destination_host;
-	u16		snoop_destination_port;
+	unsigned long	rl_rate;			// throttle rate
+	int		num_tbfs;			// number of throttle buckets
 
-	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 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>
+
+	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.
+
+	int		cluster_hb_interval;		// How often to send a heartbeat.
+	int		cluster_hb_timeout;		// How many missed heartbeats trigger an election.
+
+#ifdef BGP
+	u16		as_number;
+	char		bgp_peer[2][64];
+	u16		bgp_peer_as[2];
+#endif
 };
 
 struct config_descriptt
@@ -357,7 +468,7 @@ struct config_descriptt
 	char *key;
 	int offset;
 	int size;
-	enum { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP } type;
+	enum { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC } type;
 };
 
 // arp.c
@@ -372,19 +483,19 @@ 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);
@@ -401,10 +512,10 @@ 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 inittap(void);
+void routeset(sessionidt, ipt ip, ipt mask, ipt gw, u8 add);
+void inittun(void);
 void initudp(void);
-void initdata(void);
+void initdata(int optdebug, char *optconfig);
 void initippool();
 sessionidt sessionbyip(ipt ip);
 sessionidt sessionbyuser(char *username);
@@ -426,37 +537,98 @@ 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 processtap(u8 * buf, int len);
+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);
+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();
-void init_cli();
+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 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_id;
+extern struct Tstats *_statistics;
+extern ipt my_address;
+extern int tun_write(u8 *data, int size);
+
+
+#define TIME (config->current_time)
+
+// 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)
+
+// CVS identifiers (for "show version file")
+extern char const *cvs_id_arp;
+extern char const *cvs_id_cli;
+extern char const *cvs_id_cluster;
+extern char const *cvs_id_constants;
+extern char const *cvs_id_control;
+extern char const *cvs_id_icmp;
+extern char const *cvs_id_l2tpns;
+extern char const *cvs_id_ll;
+extern char const *cvs_id_md5;
+extern char const *cvs_id_ppp;
+extern char const *cvs_id_radius;
+extern char const *cvs_id_tbf;
+extern char const *cvs_id_util;
+
+#endif /* __L2TPNS_H__ */