Merge branch 'fdn-mods'

[l2tpns.git] / l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index 724a959..4f7fad9 100644 (file)
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,11 +1,10 @@
 // L2TPNS Global Stuff
 // L2TPNS Global Stuff

-// $Id: l2tpns.h,v 1.75 2005/06/02 11:32:31 bodea Exp $
+// $Id: l2tpns.h,v 1.121 2009/12/08 14:49:28 bodea Exp $

 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
 
 #include <netinet/in.h>
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
 
 #include <netinet/in.h>

-#include <execinfo.h>

 #include <stdio.h>
 #include <signal.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <signal.h>
 #include <stdlib.h>


@@ -15,35 +14,52 @@
 #include <sys/types.h>
 #include <libcli.h>
 
 #include <sys/types.h>
 #include <libcli.h>
 

-#define VERSION        "2.1.0"
+#define VERSION        "2.2.0"

 
 // Limits
 #define MAXTUNNEL      500             // could be up to 65535
 
 // Limits
 #define MAXTUNNEL      500             // could be up to 65535

+#define MAXBUNDLE      300             // could be up to 65535
+#define MAXBUNDLESES   12              // Maximum number of member links in bundle
+#define MAXADDRESS     20              // Maximum length for the Endpoint Discrminiator address

 #define MAXSESSION     60000           // could be up to 65535
 #define MAXTBFS                6000            // Maximum token bucket filters. Might need up to 2 * session.
 
 #define RADIUS_SHIFT   6
 #define MAXSESSION     60000           // could be up to 65535
 #define MAXTBFS                6000            // Maximum token bucket filters. Might need up to 2 * session.
 
 #define RADIUS_SHIFT   6

+#define RADIUS_FDS     (1 << RADIUS_SHIFT)

 #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 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        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 MINMTU         576             // minimum recommended MTU (rfc1063)
+#define MAXMTU         2600            // arbitrary maximum MTU
+#define PPPoE_MRU      1492            // maximum PPPoE MRU (rfc2516: 1500 less PPPoE header (6) and PPP protocol ID (2))
+#define MAXETHER       (MAXMTU+18)     // max packet we try sending to tun
+#define MAXTEL         96              // telephone number
+#define MAXHOSTNAME    256             // hostname

 #define MAXUSER                128             // username
 #define MAXPASS                128             // password
 #define MAXPLUGINS     20              // maximum number of plugins to load
 #define MAXRADSERVER   10              // max radius servers
 #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 MAXROUTE       10              // max static routes per session

 #define MAXIPPOOL      131072          // max number of ip addresses in pool
 #define RINGBUFFER_SIZE        10000           // Number of ringbuffer entries to allocate
 #define MAX_LOG_LENGTH 512             // Maximum size of log message
 #define MAXIPPOOL      131072          // max number of ip addresses in pool
 #define RINGBUFFER_SIZE        10000           // Number of ringbuffer entries to allocate
 #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 ECHO_TIMEOUT   10              // Time between last packet sent and LCP ECHO generation
+#define IDLE_TIMEOUT   240             // Time between last packet seen and session shutdown

 #define BUSY_WAIT_TIME 3000            // 5 minutes in 1/10th seconds to wait for radius to cleanup on shutdown
 #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
+
+#define MP_BEGIN        0x80            // This value is used when (b)egin bit is set in MP header
+#define MP_END          0x40            // This value is used when (e)nd bit is set in MP header
+#define MP_BOTH_BITS    0xC0            // This value is used when both bits (begin and end) are set in MP header
+
+#define MINFRAGLEN     64              // Minumum fragment length
+#define MAXFRAGLEN     750             // Maximum length for Multilink fragment (MTU / 2 sessions)
+#define MAXFRAGNUM     128             // Maximum number of Multilink fragment in a bundle (must be in the form of 2^X)
+                                       // it's not expected to have a space for more than 10 unassembled packets = 10 * MAXBUNDLESES
+#define        MAXFRAGNUM_MASK 127             // Must be equal to MAXFRAGNUM-1

 
 // Constants
 #ifndef ETCDIR
 
 // Constants
 #ifndef ETCDIR


@@ -71,19 +87,20 @@
 #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

-#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        PKTARP          0x0806          // ARP packet type
-#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        PPPIPV6CP       0x8057
-#define        PPPCCP          0x80FD
+#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 DAEPORT                3799                            // DAE port
+#define PKTARP         0x0806                          // ARP packet type
+#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 PPPIPV6CP      0x8057
+#define PPPCCP         0x80FD

 #define PPPIP          0x0021
 #define PPPIPV6                0x0057
 #define PPPMP          0x003D
 #define PPPIP          0x0021
 #define PPPIPV6                0x0057
 #define PPPMP          0x003D


@@ -110,11 +127,80 @@ enum {
        AccessReject,
        AccountingRequest,
        AccountingResponse,
        AccessReject,
        AccountingRequest,
        AccountingResponse,

-       AccessChallenge = 11
+       AccessChallenge = 11,
+       DisconnectRequest = 40,
+       DisconnectACK,
+       DisconnectNAK,
+       CoARequest,
+       CoAACK,
+       CoANAK
+};
+
+// PPP phases
+enum {
+       Dead,
+       Establish,
+       Authenticate,
+       Network,
+       Terminate
+};
+
+// PPP states
+enum {
+       Initial,
+       Starting,
+       Closed,
+       Stopped,
+       Closing,
+       Stopping,
+       RequestSent,
+       AckReceived,
+       AckSent,
+       Opened

 };
 
 };
 

+// reset state machine counters
+#define initialise_restart_count(_s, _fsm)                     \
+       sess_local[_s]._fsm.conf_sent =                         \
+       sess_local[_s]._fsm.nak_sent = 0
+
+// no more attempts
+#define zero_restart_count(_s, _fsm) ({                                \
+       sess_local[_s]._fsm.conf_sent =                         \
+               config->ppp_max_configure;                      \
+       sess_local[_s]._fsm.restart =                           \
+               time_now + config->ppp_restart_time;            \
+})
+
+// increment ConfReq counter and reset timer
+#define restart_timer(_s, _fsm) ({                             \
+       sess_local[_s]._fsm.conf_sent++;                        \
+       sess_local[_s]._fsm.restart =                           \
+               time_now + config->ppp_restart_time;            \
+})
+
+// stop timer on change to state where timer does not run
+#define change_state(_s, _fsm, _new) ({                                \
+       if (_new != session[_s].ppp._fsm)                       \
+       {                                                       \
+               switch (_new)                                   \
+               {                                               \
+               case Initial:                                   \
+               case Starting:                                  \
+               case Closed:                                    \
+               case Stopped:                                   \
+               case Opened:                                    \
+                       sess_local[_s]._fsm.restart = 0;        \
+                       initialise_restart_count(_s, _fsm);     \
+               }                                               \
+               session[_s].ppp._fsm = _new;                    \
+               cluster_send_session(_s);                       \
+       }                                                       \
+})
+

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

+typedef uint16_t bundleidt;

 typedef uint16_t tunnelidt;
 typedef uint32_t clockt;
 typedef uint8_t hasht[16];
 typedef uint16_t tunnelidt;
 typedef uint32_t clockt;
 typedef uint8_t hasht[16];


@@ -160,18 +246,38 @@ typedef struct controls           // control message
 }
 controlt;
 
 }
 controlt;
 

+typedef struct {
+       uint8_t length;                 // Endpoint Discriminator length
+       uint8_t addr_class;             // Endpoint Discriminator class
+       uint8_t address[MAXADDRESS];    // Endpoint Discriminator address
+} epdist;
+
+typedef struct {
+       sessionidt sid;                 // Fragment originating session
+       uint8_t flags;                  // MP frame flags
+       uint32_t seq;                   // fragment seq num
+        uint16_t length;                // Fragment length
+        uint8_t data[MAXFRAGLEN];       // Fragment data
+} fragmentt;
+

 typedef struct
 {
        sessionidt next;                // next session in linked list
        sessionidt far;                 // far end session ID
        tunnelidt tunnel;               // near end tunnel ID
 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.
+       uint8_t flags;                  // session flags: see SESSION_*
+       struct {
+               uint8_t phase;          // PPP phase
+               uint8_t lcp:4;          //   LCP    state
+               uint8_t ipcp:4;         //   IPCP   state
+               uint8_t ipv6cp:4;       //   IPV6CP state
+               uint8_t ccp:4;          //   CCP    state
+       } ppp;
+       char reserved_1[2];             // unused: padding

        in_addr_t ip;                   // IP of session set by RADIUS response (host byte order).
        int ip_pool_index;              // index to IP pool
        uint32_t unique_id;             // unique session id
        in_addr_t ip;                   // IP of session set by RADIUS response (host byte order).
        int ip_pool_index;              // index to IP pool
        uint32_t unique_id;             // unique session id

-       uint16_t nr;                    // next receive
-       uint16_t ns;                    // next send
+       char reserved_2[4];             // unused: was ns/nr

        uint32_t magic;                 // ppp magic number
        uint32_t pin, pout;             // packet counts
        uint32_t cin, cout;             // byte counts
        uint32_t magic;                 // ppp magic number
        uint32_t pin, pout;             // packet counts
        uint32_t cin, cout;             // byte counts


@@ -184,33 +290,64 @@ typedef struct
        uint16_t mru;                   // maximum receive unit
        clockt opened;                  // when started
        clockt die;                     // being closed, when to finally free
        uint16_t mru;                   // maximum receive unit
        clockt opened;                  // when started
        clockt die;                     // being closed, when to finally free

+       uint32_t session_timeout;       // Maximum session time in seconds
+       uint32_t idle_timeout;          // Maximum idle time in seconds

        time_t last_packet;             // Last packet from the user (used for idle timeouts)
        time_t last_packet;             // Last packet from the user (used for idle timeouts)

+       time_t last_data;               // Last data packet to/from the user (used for idle timeouts)

        in_addr_t dns1, dns2;           // DNS servers
        routet route[MAXROUTE];         // static routes
        uint16_t tbf_in;                // filter bucket for throttling in from the user.
        uint16_t tbf_out;               // filter bucket for throttling out to the user.
        int random_vector_length;
        in_addr_t dns1, dns2;           // DNS servers
        routet route[MAXROUTE];         // static routes
        uint16_t tbf_in;                // filter bucket for throttling in from the user.
        uint16_t tbf_out;               // filter bucket for throttling out to the user.
        int random_vector_length;

-       char random_vector[MAXTEL];
+       uint8_t 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 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;

+       clockt timeout;                 // Session timeout
+        uint32_t mrru;                  // Multilink Max-Receive-Reconstructed-Unit
+        uint8_t mssf;                   // Multilink Short Sequence Number Header Format
+        epdist epdis;                   // Multilink Endpoint Discriminator
+        bundleidt bundle;               // Multilink Bundle Identifier

        in_addr_t snoop_ip;             // Interception destination IP
        uint16_t snoop_port;            // Interception destination port
        uint8_t walled_garden;          // is this session gardened?
        uint8_t ipv6prefixlen;          // IPv6 route prefix length
        struct in6_addr ipv6route;      // Static IPv6 route
        in_addr_t snoop_ip;             // Interception destination IP
        uint16_t snoop_port;            // Interception destination port
        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
+       char reserved_3[11];            // Space to expand structure without changing HB_VERSION

 }
 sessiont;
 
 }
 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
+typedef struct
+{
+        int state;                              // current state (bundlestate enum)
+        uint32_t seq_num_t;                     // Sequence Number (transmission)
+        uint32_t timeout;                       // Session-Timeout for bundle
+       uint32_t max_seq;                       // Max value of sequence number field
+        uint8_t num_of_links;                   // Number of links joint to this bundle
+        uint32_t online_time;                   // The time this bundle is online
+        clockt last_check;                      // Last time the timeout is checked
+        uint32_t mrru;                          // Multilink Max-Receive-Reconstructed-Unit
+        uint8_t mssf;                           // Multilink Short Sequence Number Header Format
+        epdist epdis;                           // Multilink Endpoint Discriminator
+        char user[MAXUSER];                     // Needed for matching member links
+        sessionidt current_ses;                 // Current session to use for sending (used in RR load-balancing)
+        sessionidt members[MAXBUNDLESES];       // Array for member links sessions
+}
+bundlet;
+
+typedef struct
+{
+        fragmentt fragment[MAXFRAGNUM];
+        uint8_t reassembled_frame[MAXETHER];    // The reassembled frame
+        uint16_t re_frame_len;                  // The reassembled frame length
+       uint16_t re_frame_begin_index, re_frame_end_index;      // reassembled frame begin index, end index respectively
+       uint16_t start_index, end_index;        // start and end sequence numbers available on the fragments array respectively
+       uint32_t M;                             // Minumum frame sequence number received over all bundle members
+       uint32_t start_seq;                     // Last received frame sequence number (bearing B bit)
+}
+fragmentationt;

 
 #define AUTHPAP                1       // allow PAP
 #define AUTHCHAP       2       // allow CHAP
 
 #define AUTHPAP                1       // allow PAP
 #define AUTHCHAP       2       // allow CHAP


@@ -225,6 +362,31 @@ typedef struct
        uint32_t cin;
        uint32_t cout;
 
        uint32_t cin;
        uint32_t cout;
 

+       // PPP restart timer/counters
+       struct {
+               time_t restart;
+               int conf_sent;
+               int nak_sent;
+       } lcp, ipcp, ipv6cp, ccp;
+
+       // identifier for Protocol-Reject, Code-Reject
+       uint8_t lcp_ident;
+
+       // authentication to use
+       int lcp_authtype;
+
+       // our MRU
+       uint16_t ppp_mru;
+
+       // our MRRU
+       uint16_t mp_mrru;
+
+       // our mssf
+       uint16_t mp_mssf;
+
+       // our Endpoint Discriminator
+       in_addr_t mp_epdis;
+

        // DoS prevention
        clockt last_packet_out;
        uint32_t packets_out;
        // DoS prevention
        clockt last_packet_out;
        uint32_t packets_out;


@@ -235,10 +397,18 @@ typedef struct
 
        // interim RADIUS
        time_t last_interim;
 
        // interim RADIUS
        time_t last_interim;

+
+       // last LCP Echo
+       time_t last_echo;
+
+       // Last Multilink frame sequence number received
+       uint32_t last_seq;

 } sessionlocalt;
 
 } sessionlocalt;
 

-#define        SESSIONPFC      1       // PFC negotiated flags
-#define        SESSIONACFC     2       // ACFC negotiated flags
+// session flags
+#define SESSION_PFC    (1 << 0)        // use Protocol-Field-Compression
+#define SESSION_ACFC   (1 << 1)        // use Address-and-Control-Field-Compression
+#define SESSION_STARTED        (1 << 2)        // RADIUS Start record sent

 
 // 168 bytes per tunnel
 typedef struct
 
 // 168 bytes per tunnel
 typedef struct


@@ -251,7 +421,7 @@ typedef struct
        uint16_t ns;            // next send
        int state;              // current state (tunnelstate enum)
        clockt last;            // when last control message sent (used for resend timeout)
        uint16_t ns;            // next send
        int state;              // current state (tunnelstate enum)
        clockt last;            // when last control message sent (used for resend timeout)

-       clockt retry;           // when to try resenting pending control
+       clockt retry;           // when to try resending pending control

        clockt die;             // being closed, when to finally free
        clockt lastrec;         // when the last control message was received
        char hostname[128];     // tunnel hostname
        clockt die;             // being closed, when to finally free
        clockt lastrec;         // when the last control message was received
        char hostname[128];     // tunnel hostname


@@ -263,18 +433,19 @@ typedef struct
 }
 tunnelt;
 
 }
 tunnelt;
 

-// 180 bytes per radius session
+// 164 bytes per radius session

 typedef struct                 // outstanding RADIUS requests
 {
        sessionidt session;     // which session this applies to
        hasht auth;             // request authenticator
        clockt retry;           // when to try next
 typedef struct                 // 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
        uint8_t id;             // ID for PPP response
        uint8_t try;            // which try we are on
        uint8_t state;          // state of radius requests
        uint8_t chap;           // set if CHAP used (is CHAP identifier)
        char pass[129];         // password
        uint8_t id;             // ID for PPP response
        uint8_t try;            // which try we are on
        uint8_t state;          // state of radius requests
        uint8_t chap;           // set if CHAP used (is CHAP identifier)

+       uint8_t term_cause;     // Stop record: Acct-Terminate-Cause
+       char const *term_msg;   //   terminate reason

 }
 radiust;
 
 }
 radiust;
 


@@ -315,16 +486,33 @@ enum
        TUNNELUNDEF,            // Undefined
 };
 
        TUNNELUNDEF,            // Undefined
 };
 

+enum
+{
+       BUNDLEFREE,             // Not in use
+       BUNDLEOPEN,             // Active bundle
+       BUNDLEUNDEF,            // Undefined
+};
+
+enum
+{
+       NULLCLASS = 0,          //End Point Discriminator classes
+       LOCALADDR,
+       IPADDR,
+       IEEEMACADDR,
+       PPPMAGIC,
+       PSNDN,
+};
+

 enum
 {
        RADIUSNULL,             // Not in use
        RADIUSCHAP,             // sending CHAP down PPP
        RADIUSAUTH,             // sending auth to RADIUS server
 enum
 {
        RADIUSNULL,             // Not in use
        RADIUSCHAP,             // sending CHAP down PPP
        RADIUSAUTH,             // sending auth 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
        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

+       RADIUSJUSTAUTH,         // sending auth to RADIUS server, just authentication, no ip assigning

 };
 
 struct Tstats
 };
 
 struct Tstats


@@ -383,6 +571,7 @@ struct Tstats
     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_sendipv6cp;

     uint32_t   call_processipv6cp;
     uint32_t   call_tunnelsend;
     uint32_t   call_sessionkill;
     uint32_t   call_processipv6cp;
     uint32_t   call_tunnelsend;
     uint32_t   call_sessionkill;


@@ -445,23 +634,33 @@ typedef struct
 
        char            tundevice[10];                  // tun device name
        char            log_filename[128];
 
        char            tundevice[10];                  // tun device name
        char            log_filename[128];

-       char            l2tpsecret[64];
+
+       char            l2tp_secret[64];                // L2TP shared secret
+       int             l2tp_mtu;                       // MTU of interface used for L2TP

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

+       int             ppp_restart_time;               // timeout for PPP restart
+       int             ppp_max_configure;              // max lcp configure requests to send
+       int             ppp_max_failure;                // max lcp configure naks to send
+

        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
        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
+
+       uint16_t        radius_dae_port;                // port for radius DAE
+       uint16_t        radius_bind_min;                // port range for udp sockets used to send/recv radius packets
+       uint16_t        radius_bind_max;

 
        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
 
        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

+       int             kill_timedout_sessions;         // kill authenticated sessions with "session_timeout == 0"

 
        in_addr_t       default_dns1, default_dns2;
 
 
        in_addr_t       default_dns1, default_dns2;
 


@@ -473,7 +672,6 @@ typedef struct
        in_addr_t       peer_address;
        int             send_garp;                      // Set to true to garp for vip address on startup
 
        in_addr_t       peer_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             dump_speed;
        char            plugins[64][MAXPLUGINS];
        char            old_plugins[64][MAXPLUGINS];


@@ -484,6 +682,7 @@ typedef struct
        int             lock_pages;                     // Lock pages into memory.
        int             icmp_rate;                      // Max number of ICMP unreachable per second to send
        int             max_packets;                    // DoS prevention: per session limit of packets/0.1s
        int             lock_pages;                     // Lock pages into memory.
        int             icmp_rate;                      // Max number of ICMP unreachable per second to send
        int             max_packets;                    // DoS prevention: per session limit of packets/0.1s

+       char            epdis_addr[20];                 // MP Endpoint Discriminator address

 
        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.


@@ -495,13 +694,16 @@ typedef struct
        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_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_bundles;      // How many bundles 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_undefined_tunnels;      // How many tunnels we're yet to receive from the master.
        int             cluster_highest_sessionid;

+       int             cluster_highest_bundleid;

        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_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_mcast_ttl;              // TTL for multicast packets

        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_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


@@ -511,6 +713,10 @@ typedef struct
 
        int             cluster_master_min_adv;         // Master advertises routes while the number of up to date
                                                        // slaves is less than this value.
 
        int             cluster_master_min_adv;         // Master advertises routes while the number of up to date
                                                        // slaves is less than this value.

+       in_addr_t       cli_bind_address;               // bind address for CLI
+       char            hostname[MAXHOSTNAME];  // hostname (overridden by -h on command line)
+       // Guest change
+       char            guest_user[MAXUSER];            // Guest account username

 
 #ifdef BGP
 #define BGP_NUM_PEERS  2
 
 #ifdef BGP
 #define BGP_NUM_PEERS  2


@@ -520,11 +726,14 @@ typedef struct
                uint16_t as;
                int keepalive;
                int hold;
                uint16_t as;
                int keepalive;
                int hold;

+               struct in_addr update_source;

        } neighbour[BGP_NUM_PEERS];
        } neighbour[BGP_NUM_PEERS];

+       in_addr_t       nexthop_address;
+       struct in6_addr nexthop6_address;

 #endif
 } configt;
 
 #endif
 } configt;
 

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

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


@@ -585,23 +794,59 @@ typedef struct
        int used;               // session ref count
 } ip_filtert;
 
        int used;               // session ref count
 } ip_filtert;
 

+// CDN result/error codes
+#define CDN_NONE                       0, 0
+#define CDN_TRY_ANOTHER                        2, 7
+#define CDN_ADMIN_DISC                 3, 0
+#define CDN_UNAVAILABLE                        4, 0
+
+// RADIUS Acct-Terminate-Cause values
+#define TERM_USER_REQUEST              1
+#define TERM_LOST_CARRIER              2
+#define TERM_LOST_SERVICE              3
+#define TERM_IDLE_TIMEOUT              4
+#define TERM_SESSION_TIMEOUT           5
+#define TERM_ADMIN_RESET               6
+#define TERM_ADMIN_REBOOT              7
+#define TERM_PORT_ERROR                        8
+#define TERM_NAS_ERROR                 9
+#define TERM_NAS_REQUEST               10
+#define TERM_NAS_REBOOT                        11
+#define TERM_PORT_UNNEEDED             12
+#define TERM_PORT_PREEMPTED            13
+#define TERM_PORT_SUSPENDED            14
+#define TERM_SERVICE_UNAVAILABLE       15
+#define TERM_CALLBACK                  16
+#define TERM_USER_ERROR                        17
+#define TERM_HOST_REQUEST              18
+#define TERM_SUPPLICANT_RESTART                19
+#define TERM_REAUTHENTICATION_FAILURE  20
+#define TERM_PORT_REINIT               21
+#define TERM_PORT_DISABLED             22
+

 // arp.c
 void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);
 
 
 // ppp.c
 // arp.c
 void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);
 
 
 // ppp.c

-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 sendlcp(tunnelidt t, sessionidt s, int authtype);
+void processpap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processchap(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void lcp_open(sessionidt s, tunnelidt t);
+void processlcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processipcp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processipv6cp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processmpframe(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint8_t extra);
+void processipv6in(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void processccp(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l);
+void sendchap(sessionidt s, tunnelidt t);
+uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, sessionidt s, tunnelidt t, uint16_t mtype, uint8_t prio, bundleidt bid, uint8_t mp_bits);
+void sendlcp(sessionidt s, tunnelidt t);

 void send_ipin(sessionidt s, uint8_t *buf, int len);
 void send_ipin(sessionidt s, uint8_t *buf, int len);

+void sendccp(sessionidt s, tunnelidt t);
+void protoreject(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l, uint16_t proto);
+int join_bundle(sessionidt s);

 
 
 // radius.c
 
 
 // radius.c


@@ -611,11 +856,12 @@ void processrad(uint8_t *buf, int len, char socket_index);
 void radiusretry(uint16_t r);
 uint16_t radiusnew(sessionidt s);
 void radiusclear(uint16_t r, sessionidt s);
 void radiusretry(uint16_t r);
 uint16_t radiusnew(sessionidt s);
 void radiusclear(uint16_t r, sessionidt s);

+void processdae(uint8_t *buf, int len, struct sockaddr_in *addr, int alen, struct in_addr *local);

 
 
 // 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 send_ipv6_ra(sessionidt s, tunnelidt t, 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);
 void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add);
 sessionidt sessionbyip(in_addr_t ip);
 sessionidt sessionbyipv6(struct in6_addr ip);


@@ -623,12 +869,17 @@ sessionidt sessionbyuser(char *username);
 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 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 sessionshutdown(sessionidt s, char const *reason, int cdn_result, int cdn_error, int term_cause);
+void filter_session(sessionidt s, int filter_in, int filter_out);

 void send_garp(in_addr_t ip);
 void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);
 void send_garp(in_addr_t ip);
 void tunnelsend(uint8_t *buf, uint16_t l, tunnelidt t);

-void sendipcp(tunnelidt t, sessionidt s);
+int tun_write(uint8_t *data, int size);
+void adjust_tcp_mss(sessionidt s, tunnelidt t, uint8_t *buf, int len, uint8_t *tcp);
+void sendipcp(sessionidt s, tunnelidt t);
+void sendipv6cp(sessionidt s, tunnelidt t);

 void processudp(uint8_t *buf, int len, struct sockaddr_in *addr);
 void processudp(uint8_t *buf, int len, struct sockaddr_in *addr);

-void snoop_send_packet(char *packet, uint16_t size, in_addr_t destination, uint16_t port);
+void snoop_send_packet(uint8_t *packet, uint16_t size, in_addr_t destination, uint16_t port);
+int find_filter(char const *name, size_t len);

 int ip_filter(uint8_t *buf, int len, uint8_t 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 ip_filter(uint8_t *buf, int len, uint8_t 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);


@@ -640,9 +891,10 @@ int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc
 #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)));
 #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);
+void _log_hex(int level, const char *title, const uint8_t *data, int maxsize);
+

 
 

-int sessionsetup(tunnelidt t, sessionidt s);
+int sessionsetup(sessionidt s, tunnelidt t);

 int run_plugins(int plugin_type, void *data);
 void rebuild_address_pool(void);
 void throttle_session(sessionidt s, int rate_in, int rate_out);
 int run_plugins(int plugin_type, void *data);
 void rebuild_address_pool(void);
 void throttle_session(sessionidt s, int rate_in, int rate_out);


@@ -658,30 +910,16 @@ int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
 
 
 // icmp.c
 
 
 // icmp.c

-void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, char *packet, int packet_len);
+void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, uint8_t *packet, int packet_len);

 
 
 extern tunnelt *tunnel;
 
 
 extern tunnelt *tunnel;

+extern bundlet *bundle;

 extern sessiont *session;
 extern sessionlocalt *sess_local;
 extern ippoolt *ip_address_pool;
 #define sessionfree (session[0].next)
 
 extern sessiont *session;
 extern sessionlocalt *sess_local;
 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, t, "Backtrace follows"); \
-       size = backtrace(array, 10); \
-       strings = backtrace_symbols(array, size); \
-       if (strings) for (i = 0; i < size; i++) \
-       { \
-               LOG(0, 0, t, "%s\n", strings[i]); \
-       } \
-       free(strings); \
-}
-

 
 extern configt *config;
 extern time_t basetime;                // Time when this process started.
 
 extern configt *config;
 extern time_t basetime;                // Time when this process started.


@@ -690,12 +928,28 @@ 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;

-extern int tun_write(uint8_t *data, int size);

 extern int clifd;
 extern int clifd;

-
+extern int epollfd;
+
+struct event_data {
+       enum {
+               FD_TYPE_CLI,
+               FD_TYPE_CLUSTER,
+               FD_TYPE_TUN,
+               FD_TYPE_UDP,
+               FD_TYPE_CONTROL,
+               FD_TYPE_DAE,
+               FD_TYPE_RADIUS,
+               FD_TYPE_BGP,
+       } type;
+       int index; // for RADIUS, BGP
+};

 
 #define TIME (config->current_time)
 
 
 #define TIME (config->current_time)
 

+extern uint16_t MRU;
+extern uint16_t MSS;
+

 // 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)
 // 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)