Add note about fragmentation in Docs/manual.html, and a sample

[l2tpns.git] / l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index 1229096..724a959 100644 (file)
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
 // L2TPNS Global Stuff

-// $Id: l2tpns.h,v 1.48 2004/12/16 23:40:31 bodea Exp $
+// $Id: l2tpns.h,v 1.75 2005/06/02 11:32:31 bodea Exp $

 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__


@@ -15,16 +15,16 @@
 #include <sys/types.h>
 #include <libcli.h>
 
 #include <sys/types.h>
 #include <libcli.h>
 

-#define VERSION        "2.0.13"
+#define VERSION        "2.1.0"

 
 // Limits
 #define MAXTUNNEL      500             // could be up to 65535
 
 // 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 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 RADIUS_SHIFT   6
+#define RADIUS_MASK    ((1 << RADIUS_SHIFT) - 1)
+#define MAXRADIUS      (1 << (8 + RADIUS_SHIFT))

 
 #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 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.


@@ -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        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
 #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 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
 
 // Constants
 #ifndef ETCDIR


@@ -51,10 +54,6 @@
 #define LIBDIR         "/usr/lib/l2tpns"
 #endif
 
 #define LIBDIR         "/usr/lib/l2tpns"
 #endif
 

-#ifndef STATEDIR
-#define STATEDIR       "/var/lib/l2tpns"
-#endif
-

 #ifndef PLUGINDIR
 #define PLUGINDIR      LIBDIR          // Plugins
 #endif
 #ifndef PLUGINDIR
 #define PLUGINDIR      LIBDIR          // Plugins
 #endif


@@ -67,12 +66,8 @@
 #define FLASHDIR       ETCDIR
 #endif
 
 #define FLASHDIR       ETCDIR
 #endif
 

-#ifndef DATADIR
-#define DATADIR                STATEDIR
-#endif
-

 #define TUNDEVICE      "/dev/net/tun"
 #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
 #define CONFIGFILE     FLASHDIR "/startup-config"      // Configuration file
 #define CLIUSERS       FLASHDIR "/users"               // CLI Users file
 #define IPPOOLFILE     FLASHDIR "/ip_pool"             // Address pool configuration


@@ -81,18 +76,20 @@
 #define        L2TPPORT        1701            // L2TP port
 #define RADPORT                1645            // old radius port...
 #define        PKTARP          0x0806          // ARP packet type
 #define        L2TPPORT        1701            // L2TP port
 #define RADPORT                1645            // old radius port...
 #define        PKTARP          0x0806          // ARP packet type

-#define        PKTIP           0x0800          // IP packet type
-#define PSEUDOMAC      0x0200          // pseudo MAC prefix (local significant MAC)
+#define        PKTIP           0x0800          // IPv4 packet type
+#define        PKTIPV6         0x86DD          // IPv6 packet type

 #define        PPPPAP          0xC023
 #define        PPPCHAP         0xC223
 #define        PPPLCP          0xC021
 #define        PPPIPCP         0x8021
 #define        PPPPAP          0xC023
 #define        PPPCHAP         0xC223
 #define        PPPLCP          0xC021
 #define        PPPIPCP         0x8021

+#define        PPPIPV6CP       0x8057

 #define        PPPCCP          0x80FD
 #define PPPIP          0x0021
 #define        PPPCCP          0x80FD
 #define PPPIP          0x0021

+#define PPPIPV6                0x0057

 #define PPPMP          0x003D
 #define MIN_IP_SIZE    0x19
 #define PPPMP          0x003D
 #define MIN_IP_SIZE    0x19

-enum
-{
+
+enum {

        ConfigReq = 1,
        ConfigAck,
        ConfigNak,
        ConfigReq = 1,
        ConfigAck,
        ConfigNak,


@@ -107,6 +104,15 @@ enum
        IdentRequest
 };
 
        IdentRequest
 };
 

+enum {
+       AccessRequest = 1,
+       AccessAccept,
+       AccessReject,
+       AccountingRequest,
+       AccountingResponse,
+       AccessChallenge = 11
+};
+

 // Types
 typedef uint16_t sessionidt;
 typedef uint16_t tunnelidt;
 // Types
 typedef uint16_t sessionidt;
 typedef uint16_t tunnelidt;


@@ -138,9 +144,6 @@ struct cli_tunnel_actions {
 
 #define CLI_TUN_KILL           0x01
 
 
 #define CLI_TUN_KILL           0x01
 

-// dump header: update number if internal format changes
-#define DUMP_MAGIC "L2TPNS#" VERSION "#"
-

 // structures
 typedef struct                 // route
 {
 // structures
 typedef struct                 // route
 {


@@ -162,58 +165,77 @@ typedef struct
        sessionidt next;                // next session in linked list
        sessionidt far;                 // far end session ID
        tunnelidt tunnel;               // near end tunnel ID
        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
        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
        uint16_t nr;                    // next receive
        uint16_t ns;                    // next send
        uint32_t magic;                 // ppp magic number

-       uint32_t cin, cout;             // byte counts

        uint32_t pin, pout;             // packet counts
        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
+       uint32_t cin, cout;             // byte counts
+       uint32_t cin_wrap, cout_wrap;   // byte counter wrap count (RADIUS accounting giagawords)
+       uint32_t cin_delta, cout_delta; // byte count changes (for dump_session())

        uint16_t throttle_in;           // upstream throttle rate (kbps)
        uint16_t throttle_out;          // downstream throttle rate
        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
        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.
        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;
        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;
        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
        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[16];              // Space to expand structure without changing HB_VERSION

 }
 sessiont;
 
 #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
 }
 sessiont;
 
 #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

+#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
 {
 
 typedef struct
 {

+       // packet counters
+       uint32_t pin;
+       uint32_t pout;
+
+       // byte counters

        uint32_t cin;
        uint32_t cout;
        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
 
 #define        SESSIONPFC      1       // PFC negotiated flags
 #define        SESSIONACFC     2       // ACFC negotiated flags


@@ -301,8 +323,8 @@ enum
        RADIUSIPCP,             // sending IPCP to end user
        RADIUSSTART,            // sending start accounting to RADIUS server
        RADIUSSTOP,             // sending stop accounting to RADIUS server
        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
        RADIUSWAIT,             // waiting timeout before available, in case delayed replies

-       RADIUSDEAD,             // errored while talking to radius server.

 };
 
 struct Tstats
 };
 
 struct Tstats


@@ -316,6 +338,7 @@ struct Tstats
     uint32_t   tun_tx_bytes;
     uint32_t   tun_rx_errors;
     uint32_t   tun_tx_errors;
     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;
 
     uint32_t   tunnel_rx_packets;
     uint32_t   tunnel_tx_packets;


@@ -346,18 +369,21 @@ struct Tstats
     uint32_t   c_forwarded;
     uint32_t   recv_forward;
 
     uint32_t   c_forwarded;
     uint32_t   recv_forward;
 

-    uint32_t   select_called;          // number of times select called
-    uint32_t   select_ready;           // number of fds returned by select
-    uint32_t   select_processed;       // number of read/writes handled per select
+    uint32_t   select_called;
+    uint32_t   multi_read_used;
+    uint32_t   multi_read_exceeded;

 
 #ifdef STATISTICS
     uint32_t   call_processtun;
     uint32_t   call_processipout;
 
 #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_processudp;
     uint32_t   call_sessionbyip;

+    uint32_t   call_sessionbyipv6;

     uint32_t   call_sessionbyuser;
     uint32_t   call_sendarp;
     uint32_t   call_sendipcp;
     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;
     uint32_t   call_tunnelsend;
     uint32_t   call_sessionkill;
     uint32_t   call_sessionshutdown;


@@ -372,18 +398,20 @@ struct Tstats
     uint32_t   call_processlcp;
     uint32_t   call_processipcp;
     uint32_t   call_processipin;
     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_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
 #endif
 };
 
 #ifdef STATISTICS
 
 #ifdef STAT_CALLS

-#define CSTAT(x)       STAT(x)
+#define CSTAT(x)       STAT(call_ ## x)

 #else
 #define CSTAT(x)
 #endif
 #else
 #define CSTAT(x)
 #endif


@@ -413,26 +441,33 @@ typedef struct
 
        char            config_file[128];
        int             reload_config;                  // flag to re-read config (set by cli)
 
        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            tundevice[10];                  // tun device name
        char            log_filename[128];
        char            l2tpsecret[64];
 
        int             multi_read_count;               // amount of packets to read per fd in processing loop
 
        char            tundevice[10];                  // tun device name
        char            log_filename[128];
        char            l2tpsecret[64];
 

+       char            random_device[256];             // random device path, defaults to RANDOMDEVICE
+

        char            radiussecret[64];
        int             radius_accounting;
        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
 
        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;
+
+       int             allow_duplicate_users;          // allow multiple logins with the same username
+

        in_addr_t       default_dns1, default_dns2;
 
        unsigned long   rl_rate;                        // default throttle rate
        int             num_tbfs;                       // number of throttle buckets
 
        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;
        char            accounting_dir[128];
        in_addr_t       bind_address;
        in_addr_t       peer_address;


@@ -444,9 +479,11 @@ typedef struct
        char            old_plugins[64][MAXPLUGINS];
 
        int             next_tbf;                       // Next HTB id available to use
        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             scheduler_fifo;                 // If the system has multiple CPUs, use FIFO scheduling
+                                                       // policy for this process.

        int             lock_pages;                     // Lock pages into memory.
        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.
 
        in_addr_t       cluster_address;                // Multicast address of cluster.
                                                        // Send to this address to have everyone hear.


@@ -462,12 +499,19 @@ typedef struct
        int             cluster_highest_sessionid;
        int             cluster_highest_tunnelid;
        clockt          cluster_last_hb;                // Last time we saw a heartbeat 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_last_hb_ver;            // Heartbeat version last seen from 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.
        uint64_t        cluster_table_version;          // # state changes processed by cluster
 
        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.
        uint64_t        cluster_table_version;          // # state changes processed by cluster
 

+       struct in6_addr ipv6_prefix;                    // Our IPv6 network pool.
+
+
+       int             cluster_master_min_adv;         // Master advertises routes while the number of up to date
+                                                       // slaves is less than this value.
+

 #ifdef BGP
 #define BGP_NUM_PEERS  2
        uint16_t as_number;
 #ifdef BGP
 #define BGP_NUM_PEERS  2
        uint16_t as_number;


@@ -480,7 +524,7 @@ typedef struct
 #endif
 } configt;
 
 #endif
 } configt;
 

-enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC };
+enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IPv4, IPv6, MAC };

 typedef struct
 {
        char *key;
 typedef struct
 {
        char *key;


@@ -550,11 +594,13 @@ 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 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 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 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);
 
 
 void send_ipin(sessionidt s, uint8_t *buf, int len);
 
 


@@ -569,9 +615,15 @@ void radiusclear(uint16_t r, sessionidt s);
 
 // l2tpns.c
 clockt backoff(uint8_t try);
 
 // 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 sessionbyip(in_addr_t ip);

+sessionidt sessionbyipv6(struct in6_addr ip);

 sessionidt sessionbyuser(char *username);
 sessionidt sessionbyuser(char *username);

-void sessionshutdown(sessionidt s, char *reason);
+void increment_counter(uint32_t *counter, uint32_t *wrap, uint32_t delta);
+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);
 void send_garp(in_addr_t ip);
 void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
 void sendipcp(tunnelidt t, sessionidt s);


@@ -611,7 +663,7 @@ void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, char
 
 extern tunnelt *tunnel;
 extern sessiont *session;
 
 extern tunnelt *tunnel;
 extern sessiont *session;

-extern sessioncountt *sess_count;
+extern sessionlocalt *sess_local;

 extern ippoolt *ip_address_pool;
 #define sessionfree (session[0].next)
 
 extern ippoolt *ip_address_pool;
 #define sessionfree (session[0].next)
 


@@ -634,6 +686,7 @@ if (count++ < max) { \
 extern configt *config;
 extern time_t basetime;                // Time when this process started.
 extern time_t time_now;                // Seconds since EPOCH.
 extern configt *config;
 extern time_t basetime;                // Time when this process started.
 extern time_t time_now;                // Seconds since EPOCH.

+extern char main_quit;

 extern uint32_t last_id;
 extern struct Tstats *_statistics;
 extern in_addr_t my_address;
 extern uint32_t last_id;
 extern struct Tstats *_statistics;
 extern in_addr_t my_address;