X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/dff555697a1dbdd6fd420683d70a045bc6615f27..d6b250ca316bced2f40c2699c21c76a83960218c:/l2tpns.h?ds=inline

diff --git a/l2tpns.h b/l2tpns.h
index 1f0ccb8..7ba879e 100644
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.9 2004/07/02 07:31:23 bodea Exp $
+// $Id: l2tpns.h,v 1.46 2004/12/13 02:27:31 bodea Exp $
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
@@ -15,7 +15,7 @@
 #include <sys/types.h>
 #include <libcli.h>
 
-#define VERSION	"2.0.0"
+#define VERSION	"2.0.13"
 
 // Limits
 #define MAXTUNNEL	500		// could be up to 65535
@@ -24,13 +24,13 @@
 
 #define RADIUS_SHIFT	5
 #define RADIUS_MASK	((unsigned short)(((unsigned short)~0) >> (16 - RADIUS_SHIFT)))
-#define	MAXRADIUS	((2 << (RADIUS_SHIFT - 1)) * 255)
+#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
@@ -40,35 +40,46 @@
 #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_TIME	3000		// 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
 
 // Constants
-#include "config.h"
-#ifndef PLUGINDIR
-#define PLUGINDIR	LIBDIR			// Plugins
+#ifndef ETCDIR
+#define ETCDIR		"/etc/l2tpns"
 #endif
 
-#ifndef PLUGINCONF
-#define PLUGINCONF	ETCDIR			// Plugin config dir
+#ifndef LIBDIR
+#define LIBDIR		"/usr/lib/l2tpns"
 #endif
 
-#ifndef DATADIR
-#define DATADIR		"/tmp"
+#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
 
-#define TAPDEVICE	"/dev/net/tun"
-#define	UDP		17
+#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 ACCT_SHUT_TIME	600		// 1 minute for counters of shutdown sessions
 #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)
@@ -92,12 +103,14 @@ enum
 	ProtocolRej,
 	EchoReq,
 	EchoReply,
-	DiscardRequest
+	DiscardRequest,
+	IdentRequest
 };
 
 // Types
 typedef unsigned short u16;
 typedef unsigned int u32;
+typedef unsigned long long u64;
 typedef unsigned char u8;
 typedef u32 ipt;
 typedef u16 portt;
@@ -106,11 +119,36 @@ 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_in;
+	int throttle_out;
+	int filter_in;
+	int filter_out;
+};
+
+#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
+#define CLI_SESS_FILTER		0x20
+#define CLI_SESS_NOFILTER	0x40
+
+struct cli_tunnel_actions {
+	char action;
+};
+
+#define CLI_TUN_KILL		0x01
+
 // dump header: update number if internal format changes
 #define DUMP_MAGIC "L2TPNS#" VERSION "#"
 
 // structures
-typedef struct routes           // route
+typedef struct			// route
 {
 	ipt ip;
 	ipt mask;
@@ -125,14 +163,14 @@ typedef struct controls         // control message
 }
 controlt;
 
-typedef struct sessions
+typedef struct
 {
 	sessionidt next;		// next session in linked list
 	sessionidt far;			// far end session ID
-	tunnelidt tunnel;		// tunnel ID
+	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
@@ -141,7 +179,8 @@ 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.
+	u16 throttle_in;		// upstream throttle rate (kbps)
+	u16 throttle_out;		// downstream throttle rate
 	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)
@@ -152,6 +191,7 @@ typedef struct sessions
 	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];
@@ -164,22 +204,28 @@ typedef struct sessions
 	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
+	u16 sid;			// near end session id.
+	u8 filter_in;			// input filter index (to ip_filters[N-1]; 0 if none)
+	u8 filter_out;			// output filter index
+	char reserved[18];		// Space to expand structure without changing HB_VERSION
 }
 sessiont;
 
-#define SF_IPCP_ACKED	(1<<0)		// Has this session seen an IPCP Ack?
+#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
 
-typedef struct {
+typedef struct
+{
 	u32	cin;
 	u32	cout;
 } sessioncountt;
 
-#define	SESSIONPFC	1            // PFC negotiated flags
-#define	SESSIONACFC	2           // ACFC negotiated flags
+#define	SESSIONPFC	1	// PFC negotiated flags
+#define	SESSIONACFC	2	// ACFC negotiated flags
 
 // 168 bytes per tunnel
-typedef struct tunnels
+typedef struct
 {
 	tunnelidt far;		// far end tunnel ID
 	ipt ip;			// Ip for far end
@@ -202,7 +248,7 @@ typedef struct tunnels
 tunnelt;
 
 // 180 bytes per radius session
-typedef struct radiuss		// outstanding RADIUS requests
+typedef struct			// outstanding RADIUS requests
 {
 	sessionidt session;	// which session this applies to
 	hasht auth;		// request authenticator
@@ -233,7 +279,6 @@ struct Tringbuffer
 		char level;
 		sessionidt session;
 		tunnelidt tunnel;
-		ipt address;
 		char message[MAX_LOG_LENGTH];
 	} buffer[RINGBUFFER_SIZE];
 	int head;
@@ -271,12 +316,12 @@ 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;
@@ -288,11 +333,7 @@ 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;
 
@@ -311,8 +352,7 @@ struct Tstats
     unsigned long	c_forwarded;
     unsigned long	recv_forward;
 #ifdef STATISTICS
-    unsigned long	call_processtap;
-    unsigned long	call_processarp;
+    unsigned long	call_processtun;
     unsigned long	call_processipout;
     unsigned long	call_processudp;
     unsigned long	call_sessionbyip;
@@ -361,11 +401,13 @@ struct Tstats
 #define SET_STAT(x, y)
 #endif
 
-struct configt
+typedef struct
 {
 	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!
@@ -375,22 +417,26 @@ struct configt
 	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;
 
-	unsigned long	rl_rate;
+	unsigned long	rl_rate;			// default throttle rate
+	int		num_tbfs;			// number of throttle buckets
+
 	int		save_state;
 	char		accounting_dir[128];
 	ipt		bind_address;
+	ipt		peer_address;
 	int		send_garp;			// Set to true to garp for vip address on startup
 
 	int		target_uid;
@@ -399,9 +445,9 @@ struct configt
 	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
+	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.
@@ -421,21 +467,80 @@ struct configt
 
 	int		cluster_hb_interval;		// How often to send a heartbeat.
 	int		cluster_hb_timeout;		// How many missed heartbeats trigger an election.
+	u64		cluster_table_version;		// # state changes processed by cluster
 
 #ifdef BGP
+#define BGP_NUM_PEERS	2
 	u16		as_number;
-	char		bgp_peer[2][64];
-	u16		bgp_peer_as[2];
+	struct {
+		char	name[64];
+	    	u16	as;
+		int	keepalive;
+		int	hold;
+	}		neighbour[BGP_NUM_PEERS];
 #endif
-};
+} configt;
 
-struct config_descriptt
+enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC };
+typedef struct
 {
 	char *key;
 	int offset;
 	int size;
-	enum { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP } type;
-};
+	enum config_typet type;
+} config_descriptt;
+
+typedef struct
+{
+	u8 op;		// operation
+#define FILTER_PORT_OP_NONE	0 // all ports match
+#define FILTER_PORT_OP_EQ	1
+#define FILTER_PORT_OP_NEQ	2
+#define FILTER_PORT_OP_GT	3
+#define FILTER_PORT_OP_LT	4
+#define FILTER_PORT_OP_RANGE	5
+	portt port;	// port (host byte order)
+	portt port2;	// range
+} ip_filter_portt;
+
+typedef struct
+{
+	int action;		// permit/deny
+#define FILTER_ACTION_DENY	1
+#define FILTER_ACTION_PERMIT	2
+	u8 proto;		// protocol: IPPROTO_* (netinet/in.h)
+	ipt src_ip;		// source ip (network byte order)
+	ipt src_wild;
+	ip_filter_portt src_ports;
+	ipt dst_ip;		// dest ip
+	ipt dst_wild;
+	ip_filter_portt dst_ports;
+	u8 frag;		// apply to non-initial fragments
+	u8 tcp_flag_op;		// match type: any, all, established
+#define FILTER_FLAG_OP_ANY	1
+#define FILTER_FLAG_OP_ALL	2
+#define FILTER_FLAG_OP_EST	3
+	u8 tcp_sflags;		// flags set
+	u8 tcp_cflags;		// flags clear
+	u32 counter;		// match count
+} ip_filter_rulet;
+
+#define TCP_FLAG_FIN	0x01
+#define TCP_FLAG_SYN	0x02
+#define TCP_FLAG_RST	0x04
+#define TCP_FLAG_PSH	0x08
+#define TCP_FLAG_ACK	0x10
+#define TCP_FLAG_URG	0x20
+
+#define MAXFILTER		32
+#define MAXFILTER_RULES		32
+typedef struct
+{
+    	char name[32];		// ACL name
+	int extended;		// type: 0 = standard, 1 = extended
+	ip_filter_rulet rules[MAXFILTER_RULES];
+	int used;		// session ref count
+} ip_filtert;
 
 // arp.c
 void sendarp(int ifr_idx, const unsigned char* mac, ipt ip);
@@ -450,9 +555,8 @@ 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, 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(u8 *p, int l);
+void send_ipin(sessionidt s, u8 * buf, int len);
 
 
 // radius.c
@@ -463,88 +567,49 @@ void radiusretry(u16 r);
 u16 radiusnew(sessionidt s);
 void radiusclear(u16 r, sessionidt s);
 
-// throttle.c
-int throttle_session(sessionidt s, int throttle);
-
-
-// rl.c
-void init_rl();
-u16 rl_create_tbf();
-u16 rl_get_tbf();
-void rl_done_tbf(u16 t);
-void rl_destroy_tbf(u16 t);
-
 
 // l2tpns.c
-clockt now(void);
 clockt backoff(u8 try);
-void routeset(sessionidt, ipt ip, ipt mask, ipt gw, u8 add);
-void inittap(void);
-void initudp(void);
-void initdata(void);
-void initippool();
 sessionidt sessionbyip(ipt ip);
 sessionidt sessionbyuser(char *username);
 void sessionshutdown(sessionidt s, char *reason);
-void sessionsendarp(sessionidt s);
 void send_garp(ipt ip);
-void sessionkill(sessionidt s, char *reason);
-void control16(controlt * c, u16 avp, u16 val, u8 m);
-void control32(controlt * c, u16 avp, u32 val, u8 m);
-void controls(controlt * c, u16 avp, char *val, u8 m);
-void controlb(controlt * c, u16 avp, char *val, unsigned int len, u8 m);
-controlt *controlnew(u16 mtype);
-void controlnull(tunnelidt t);
-void controladd(controlt * c, tunnelidt t, sessionidt s);
 void tunnelsend(u8 * buf, u16 l, tunnelidt t);
-void tunnelkill(tunnelidt t, char *reason);
-void tunnelshutdown(tunnelidt t, char *reason);
 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 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, ipt destination, u16 port);
-void dump_acct_info();
-void mainloop(void);
+int ip_filter(u8 *buf, int len, u8 filter);
 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, ...) __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);
+#undef LOG
+#undef LOG_HEX
+#define LOG(D, s, t, f, ...)	({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })
+#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);
+
 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 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);
 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);
+void throttle_session(sessionidt s, int rate_in, int rate_out);
 int load_session(sessionidt, sessiont *);
 void become_master(void);	// We're the master; kick off any required master initializations.
+
+
+// cli.c
+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, ...);
+
+
+// icmp.c
+void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len);
+
+
 extern tunnelt *tunnel;
 extern sessiont *session;
 extern sessioncountt *sess_count;
@@ -556,24 +621,25 @@ if (count++ < max) { \
 	void *array[20]; \
 	char **strings; \
 	int size, i; \
-	log(0, 0, 0, t, "Backtrace follows"); \
+	LOG(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]); \
+		LOG(0, 0, t, "%s\n", strings[i]); \
 	} \
 	free(strings); \
 }
 
 
-extern struct configt *config;
+extern configt *config;
 extern time_t basetime;		// Time when this process started.
 extern time_t time_now;		// Seconds since EPOCH.
-extern u32 last_sid;
+extern u32 last_id;
 extern struct Tstats *_statistics;
 extern ipt my_address;
 extern int tun_write(u8 *data, int size);
+extern int clifd;
 
 
 #define TIME (config->current_time)