mss tweaking now internal

[l2tpns.git] / l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index edb9daf..577de9c 100644 (file)
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
 // L2TPNS Global Stuff

-// $Id: l2tpns.h,v 1.68 2005-05-08 07:13:56 bodea Exp $
+// $Id: l2tpns.h,v 1.91 2005-09-16 05:04:29 bodea Exp $

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


@@ -15,22 +15,26 @@
 #include <sys/types.h>
 #include <libcli.h>
 
 #include <sys/types.h>
 #include <libcli.h>
 

-#define VERSION        "2.1.0"
+#define VERSION        "2.1.7"

 
 // Limits
 #define MAXTUNNEL      500             // 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.
 
 
 // Limits
 #define MAXTUNNEL      500             // 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 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_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        MAXCONTROL      1000            // max length control message we ever send...
 
 #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 MINMTU         576             // minimum recommended MTU (rfc1063)
+#define PPPMTU         1500            // default PPP MTU
+#define MAXMTU         2600            // arbitrary maximum MTU
+#define        MAXETHER        (MAXMTU+18)     // max packet we try sending to tun

 #define        MAXTEL          96              // telephone number
 #define MAXUSER                128             // username
 #define MAXPASS                128             // password
 #define        MAXTEL          96              // telephone number
 #define MAXUSER                128             // username
 #define MAXPASS                128             // password


@@ -43,7 +47,6 @@
 #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    1458            // maximum packet size to avoid fragmentation when LNS ethernet MTU is 1500

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


@@ -71,13 +74,14 @@
 #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 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        PPPPAP          0xC023
 #define        PPPCHAP         0xC223
 #define        PPPLCP          0xC021


@@ -110,9 +114,61 @@ 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
+
+// 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;
 typedef uint16_t tunnelidt;
 // Types
 typedef uint16_t sessionidt;
 typedef uint16_t tunnelidt;


@@ -166,17 +222,24 @@ typedef struct
        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.
        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.
+       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
+               uint8_t pad;            // unused
+       } ppp;

        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
        uint32_t magic;                 // ppp magic number
        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
        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 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
        uint8_t filter_in;              // input filter index (to ip_filters[N-1]; 0 if none)
        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)


@@ -190,7 +253,7 @@ typedef struct
        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;
        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
        char user[MAXUSER];             // user (needed in seesion for radius stop messages)
        char called[MAXTEL];            // called number
        char calling[MAXTEL];           // calling number


@@ -201,26 +264,39 @@ typedef struct
        uint8_t walled_garden;          // is this session gardened?
        uint8_t ipv6prefixlen;          // IPv6 route prefix length
        struct in6_addr ipv6route;      // Static IPv6 route
        uint8_t walled_garden;          // is this session gardened?
        uint8_t ipv6prefixlen;          // IPv6 route prefix length
        struct in6_addr ipv6route;      // Static IPv6 route

-       char reserved[24];              // Space to expand structure without changing HB_VERSION
+       char reserved[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
-

 #define AUTHPAP                1       // allow PAP
 #define AUTHCHAP       2       // allow CHAP
 
 typedef struct
 {
 #define AUTHPAP                1       // allow PAP
 #define AUTHCHAP       2       // allow CHAP
 
 typedef struct
 {

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

        // byte counters
        uint32_t cin;
        uint32_t cout;
 
        // byte counters
        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;
+

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


@@ -259,13 +335,12 @@ typedef struct
 }
 tunnelt;
 
 }
 tunnelt;
 

-// 180 bytes per radius session
+// 160 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
        char pass[129];         // password
        uint8_t id;             // ID for PPP response
        uint8_t try;            // which try we are on


@@ -316,7 +391,6 @@ enum
        RADIUSNULL,             // Not in use
        RADIUSCHAP,             // sending CHAP down PPP
        RADIUSAUTH,             // sending auth to RADIUS server
        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
        RADIUSSTART,            // sending start accounting to RADIUS server
        RADIUSSTOP,             // sending stop accounting to RADIUS server
        RADIUSINTERIM,          // sending interim accounting to RADIUS server


@@ -379,6 +453,7 @@ 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;


@@ -437,27 +512,35 @@ 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];
        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            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;                // local port for radius dae

 
        char            radius_authtypes_s[32];         // list of valid authentication types (chap, pap) in order of preference
        int             radius_authtypes;
        int             radius_authprefer;
 
 
        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
        in_addr_t       default_dns1, default_dns2;
 
        unsigned long   rl_rate;                        // default throttle rate


@@ -474,7 +557,8 @@ 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             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


@@ -493,14 +577,20 @@ 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_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
 
        struct in6_addr ipv6_prefix;                    // Our IPv6 network pool.
 
        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;


@@ -579,18 +669,20 @@ void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);
 
 
 // ppp.c
 
 
 // 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 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);
+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);

 
 
 // radius.c
 
 
 // radius.c


@@ -600,23 +692,30 @@ 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);

 
 
 // 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);
 sessionidt sessionbyuser(char *username);
 void route6set(sessionidt s, struct in6_addr ip, int prefixlen, int add);
 sessionidt sessionbyip(in_addr_t ip);
 sessionidt sessionbyipv6(struct in6_addr ip);
 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 sessionshutdown(sessionidt s, char *reason, int result, int error);
 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 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);


@@ -628,9 +727,9 @@ 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);


@@ -646,7 +745,7 @@ 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;


@@ -660,12 +759,12 @@ if (count++ < max) { \
        void *array[20]; \
        char **strings; \
        int size, i; \
        void *array[20]; \
        char **strings; \
        int size, i; \

-       LOG(0, 0, t, "Backtrace follows"); \
+       LOG(0, 0, t, "Backtrace follows:\n"); \

        size = backtrace(array, 10); \
        strings = backtrace_symbols(array, size); \
        if (strings) for (i = 0; i < size; i++) \
        { \
        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]); \
+               LOG(0, 0, t, " %s\n", strings[i]); \

        } \
        free(strings); \
 }
        } \
        free(strings); \
 }


@@ -674,15 +773,32 @@ 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;

-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)