- fix leak in session freelist when initial RADIUS session allocation fails

[l2tpns.git] / l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index eb575a3..3c389d2 100644 (file)
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
 // L2TPNS Global Stuff

-// $Id: l2tpns.h,v 1.38 2004/11/27 05:19:53 bodea Exp $
+// $Id: l2tpns.h,v 1.49.2.7 2005/05/07 03:51:24 bodea Exp $

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


@@ -15,11 +15,11 @@
 #include <sys/types.h>
 #include <libcli.h>
 
 #include <sys/types.h>
 #include <libcli.h>
 

-#define VERSION        "2.0.9"
+#define VERSION        "2.0.19"

 
 // 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 RADIUS_SHIFT   5
 #define MAXTBFS                6000            // Maximum token bucket filters. Might need up to 2 * session.
 
 #define RADIUS_SHIFT   5


@@ -77,6 +77,7 @@
 #define CLIUSERS       FLASHDIR "/users"               // CLI Users file
 #define IPPOOLFILE     FLASHDIR "/ip_pool"             // Address pool configuration
 #define ACCT_TIME      3000            // 5 minute accounting interval
 #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        L2TPPORT        1701            // L2TP port
 #define RADPORT                1645            // old radius port...
 #define        PKTARP          0x0806          // ARP packet type


@@ -107,23 +108,20 @@ enum
 };
 
 // Types
 };
 
 // Types

-typedef unsigned short u16;
-typedef unsigned int u32;
-typedef unsigned char u8;
-typedef u32 ipt;
-typedef u16 portt;
-typedef u16 sessionidt;
-typedef u16 tunnelidt;
-typedef u32 clockt;
-typedef u8 hasht[16];
+typedef uint16_t sessionidt;
+typedef uint16_t tunnelidt;
+typedef uint32_t clockt;
+typedef uint8_t hasht[16];

 
 // CLI actions
 struct cli_session_actions {
        char action;
 
 // CLI actions
 struct cli_session_actions {
        char action;

-       ipt snoop_ip;
-       u16 snoop_port;
+       in_addr_t snoop_ip;
+       uint16_t snoop_port;

        int throttle_in;
        int throttle_out;
        int throttle_in;
        int throttle_out;

+       int filter_in;
+       int filter_out;

 };
 
 #define CLI_SESS_KILL          0x01
 };
 
 #define CLI_SESS_KILL          0x01


@@ -131,6 +129,8 @@ struct cli_session_actions {
 #define CLI_SESS_NOSNOOP       0x04
 #define CLI_SESS_THROTTLE      0x08
 #define CLI_SESS_NOTHROTTLE    0x10
 #define CLI_SESS_NOSNOOP       0x04
 #define CLI_SESS_THROTTLE      0x08
 #define CLI_SESS_NOTHROTTLE    0x10

+#define CLI_SESS_FILTER                0x20
+#define CLI_SESS_NOFILTER      0x40

 
 struct cli_tunnel_actions {
        char action;
 
 struct cli_tunnel_actions {
        char action;


@@ -144,16 +144,16 @@ struct cli_tunnel_actions {
 // structures
 typedef struct                 // route
 {
 // structures
 typedef struct                 // route
 {

-       ipt ip;
-       ipt mask;
+       in_addr_t ip;
+       in_addr_t mask;

 }
 routet;
 
 }
 routet;
 

-typedef struct controls         // control message
+typedef struct controls                // control message

 {
 {

-       struct controls *next;  // next in queue
-       u16 length;             // length
-       u8 buf[MAXCONTROL];
+       struct controls *next;  // next in queue
+       uint16_t length;        // length
+       uint8_t buf[MAXCONTROL];

 }
 controlt;
 
 }
 controlt;
 


@@ -162,45 +162,45 @@ 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

-       ipt ip;                         // IP of session set by RADIUS response (host byte order).
+       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
        int ip_pool_index;              // index to IP pool
        unsigned long unique_id;        // unique session id

-       u16 nr;                         // next receive
-       u16 ns;                         // next send
-       u32 magic;                      // ppp magic number
-       u32 cin, cout;                  // byte counts
-       u32 pin, pout;                  // packet counts
-       u32 total_cin;                  // This counter is never reset while a session is open
-       u32 total_cout;                 // This counter is never reset while a session is open
-       u32 id;                         // session id
-       u16 throttle_in;                // upstream throttle rate (kbps)
-       u16 throttle_out;               // downstream throttle rate
+       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 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
+       uint16_t throttle_in;           // upstream throttle rate (kbps)
+       uint16_t throttle_out;          // downstream throttle rate

        clockt opened;                  // when started
        clockt die;                     // being closed, when to finally free
        time_t last_packet;             // Last packet from the user (used for idle timeouts)
        clockt opened;                  // when started
        clockt die;                     // being closed, when to finally free
        time_t last_packet;             // Last packet from the user (used for idle timeouts)

-       ipt dns1, dns2;                 // DNS servers
+       in_addr_t dns1, dns2;           // DNS servers

        routet route[MAXROUTE];         // static routes
        routet route[MAXROUTE];         // static routes

-       u16 radius;                     // which radius session is being used (0 for not waiting on authentication)
-       u16 mru;                        // maximum receive unit
-       u16 tbf_in;                     // filter bucket for throttling in from the user.
-       u16 tbf_out;                    // filter bucket for throttling out to the user.
-       u8 l2tp_flags;                  // various bit flags from the ICCN on the l2tp tunnel.
-       u8 reserved_old_snoop;          // No longer used - remove at some time
-       u8 walled_garden;               // is this session gardened?
-       u8 flags1;                      // additional flags (currently unused);
+       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.
+       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;
        char user[129];                 // user (needed in seesion for radius stop messages) (can we reduce this? --mo)
        char called[MAXTEL];            // called number
        char calling[MAXTEL];           // calling number
        char random_vector[MAXTEL];
        int random_vector_length;
        char user[129];                 // user (needed in seesion for radius stop messages) (can we reduce this? --mo)
        char called[MAXTEL];            // called number
        char calling[MAXTEL];           // calling number

-       u32 tx_connect_speed;
-       u32 rx_connect_speed;
-       u32 flags;                      // Various session flags.
-       ipt snoop_ip;                   // Interception destination IP
-       u16 snoop_port;                 // Interception destination port
-       u16 sid;                        // near end session id.
-       u8 filter_in;                   // input filter index (to ip_filters[N-1]; 0 if none)
-       u8 filter_out;                  // output filter index
+       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
+       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
 }
 sessiont;
        char reserved[18];              // Space to expand structure without changing HB_VERSION
 }
 sessiont;


@@ -211,9 +211,15 @@ sessiont;
 
 typedef struct
 {
 
 typedef struct
 {

-       u32     cin;
-       u32     cout;
-} sessioncountt;
+       // byte counters
+       uint32_t cin;
+       uint32_t cout;
+
+       // DoS prevention
+       clockt last_packet_out;
+       uint32_t packets_out;
+       uint32_t packets_dropped;
+} 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


@@ -222,11 +228,11 @@ typedef struct
 typedef struct
 {
        tunnelidt far;          // far end tunnel ID
 typedef struct
 {
        tunnelidt far;          // far end tunnel ID

-       ipt ip;                 // Ip for far end
-       portt port;             // port for far end
-       u16 window;             // Rx window
-       u16 nr;                 // next receive
-       u16 ns;                 // next send
+       in_addr_t ip;           // Ip for far end
+       uint16_t port;          // port for far end
+       uint16_t window;        // Rx window
+       uint16_t nr;            // next receive
+       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
        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


@@ -234,8 +240,8 @@ typedef struct
        clockt lastrec;         // when the last control message was received
        char hostname[128];     // tunnel hostname
        char vendor[128];       // LAC vendor
        clockt lastrec;         // when the last control message was received
        char hostname[128];     // tunnel hostname
        char vendor[128];       // LAC vendor

-       u8 try;                 // number of retrys on a control message
-       u16 controlc;           // outstaind messages in queue
+       uint8_t try;            // number of retrys on a control message
+       uint16_t controlc;      // outstaind messages in queue

        controlt *controls;     // oldest message
        controlt *controle;     // newest message
 }
        controlt *controls;     // oldest message
        controlt *controle;     // newest message
 }


@@ -249,16 +255,16 @@ typedef struct                    // outstanding RADIUS requests
        clockt retry;           // when to try next
        char calling[MAXTEL];   // calling number
        char pass[129];         // password
        clockt retry;           // when to try next
        char calling[MAXTEL];   // calling number
        char pass[129];         // password

-       u8 id;                  // ID for PPP response
-       u8 try;                 // which try we are on
-       u8 state;               // state of radius requests
-       u8 chap;                // set if CHAP used (is CHAP identifier)
+       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)

 }
 radiust;
 
 typedef struct
 {
 }
 radiust;
 
 typedef struct
 {

-       ipt             address;        // Host byte order..
+       in_addr_t       address;        // Host byte order..

        char            assigned;       // 1 if assigned, 0 if free
        sessionidt      session;
        clockt          last;           // last used
        char            assigned;       // 1 if assigned, 0 if free
        sessionidt      session;
        clockt          last;           // last used


@@ -273,7 +279,6 @@ struct Tringbuffer
                char level;
                sessionidt session;
                tunnelidt tunnel;
                char level;
                sessionidt session;
                tunnelidt tunnel;

-               ipt address;

                char message[MAX_LOG_LENGTH];
        } buffer[RINGBUFFER_SIZE];
        int head;
                char message[MAX_LOG_LENGTH];
        } buffer[RINGBUFFER_SIZE];
        int head;


@@ -308,71 +313,77 @@ enum
 
 struct Tstats
 {
 
 struct Tstats
 {

-    time_t             start_time;
-    time_t             last_reset;
-
-    unsigned long      tun_rx_packets;
-    unsigned long      tun_tx_packets;
-    unsigned long      tun_rx_bytes;
-    unsigned long      tun_tx_bytes;
-    unsigned long      tun_rx_errors;
-    unsigned long      tun_tx_errors;
-
-    unsigned long      tunnel_rx_packets;
-    unsigned long      tunnel_tx_packets;
-    unsigned long      tunnel_rx_bytes;
-    unsigned long      tunnel_tx_bytes;
-    unsigned long      tunnel_rx_errors;
-    unsigned long      tunnel_tx_errors;
-
-    unsigned long      tunnel_retries;
-    unsigned long      radius_retries;
-
-    unsigned long      arp_sent;
-
-    unsigned long      packets_snooped;
-
-    unsigned long      tunnel_created;
-    unsigned long      session_created;
-    unsigned long      tunnel_timeout;
-    unsigned long      session_timeout;
-    unsigned long      radius_timeout;
-    unsigned long      radius_overflow;
-    unsigned long      tunnel_overflow;
-    unsigned long      session_overflow;
-
-    unsigned long      ip_allocated;
-    unsigned long      ip_freed;
-
-    unsigned long      c_forwarded;
-    unsigned long      recv_forward;
+    time_t     start_time;
+    time_t     last_reset;
+
+    uint32_t   tun_rx_packets;
+    uint32_t   tun_tx_packets;
+    uint32_t   tun_rx_bytes;
+    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_bytes;
+    uint32_t   tunnel_tx_bytes;
+    uint32_t   tunnel_rx_errors;
+    uint32_t   tunnel_tx_errors;
+
+    uint32_t   tunnel_retries;
+    uint32_t   radius_retries;
+
+    uint32_t   arp_sent;
+
+    uint32_t   packets_snooped;
+
+    uint32_t   tunnel_created;
+    uint32_t   session_created;
+    uint32_t   tunnel_timeout;
+    uint32_t   session_timeout;
+    uint32_t   radius_timeout;
+    uint32_t   radius_overflow;
+    uint32_t   tunnel_overflow;
+    uint32_t   session_overflow;
+
+    uint32_t   ip_allocated;
+    uint32_t   ip_freed;
+
+    uint32_t   c_forwarded;
+    uint32_t   recv_forward;
+
+    uint32_t   select_called;
+    uint32_t   multi_read_used;
+    uint32_t   multi_read_exceeded;
+

 #ifdef STATISTICS
 #ifdef STATISTICS

-    unsigned long      call_processtun;
-    unsigned long      call_processipout;
-    unsigned long      call_processudp;
-    unsigned long      call_sessionbyip;
-    unsigned long      call_sessionbyuser;
-    unsigned long      call_sendarp;
-    unsigned long      call_sendipcp;
-    unsigned long      call_tunnelsend;
-    unsigned long      call_sessionkill;
-    unsigned long      call_sessionshutdown;
-    unsigned long      call_tunnelkill;
-    unsigned long      call_tunnelshutdown;
-    unsigned long      call_assign_ip_address;
-    unsigned long      call_free_ip_address;
-    unsigned long      call_dump_acct_info;
-    unsigned long      call_sessionsetup;
-    unsigned long      call_processpap;
-    unsigned long      call_processchap;
-    unsigned long      call_processlcp;
-    unsigned long      call_processipcp;
-    unsigned long      call_processipin;
-    unsigned long      call_processccp;
-    unsigned long      call_sendchap;
-    unsigned long      call_processrad;
-    unsigned long      call_radiussend;
-    unsigned long      call_radiusretry;
+    uint32_t   call_processtun;
+    uint32_t   call_processipout;
+    uint32_t   call_processudp;
+    uint32_t   call_sessionbyip;
+    uint32_t   call_sessionbyuser;
+    uint32_t   call_sendarp;
+    uint32_t   call_sendipcp;
+    uint32_t   call_tunnelsend;
+    uint32_t   call_sessionkill;
+    uint32_t   call_sessionshutdown;
+    uint32_t   call_tunnelkill;
+    uint32_t   call_tunnelshutdown;
+    uint32_t   call_assign_ip_address;
+    uint32_t   call_free_ip_address;
+    uint32_t   call_dump_acct_info;
+    uint32_t   call_sessionsetup;
+    uint32_t   call_processpap;
+    uint32_t   call_processchap;
+    uint32_t   call_processlcp;
+    uint32_t   call_processipcp;
+    uint32_t   call_processipin;
+    uint32_t   call_processccp;
+    uint32_t   call_sendchap;
+    uint32_t   call_processrad;
+    uint32_t   call_radiussend;
+    uint32_t   call_radiusretry;

 #endif
 };
 
 #endif
 };
 


@@ -418,20 +429,20 @@ typedef struct
 
        char            radiussecret[64];
        int             radius_accounting;
 
        char            radiussecret[64];
        int             radius_accounting;

-       ipt             radiusserver[MAXRADSERVER];     // radius servers
-       u16             radiusport[MAXRADSERVER];       // radius base ports
-       u8              numradiusservers;               // radius server count
+       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
 
        short           num_radfds;                     // Number of radius filehandles allocated
 

-       ipt             default_dns1, default_dns2;
+       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];
 
        unsigned long   rl_rate;                        // default throttle rate
        int             num_tbfs;                       // number of throttle buckets
 
        int             save_state;
        char            accounting_dir[128];

-       ipt             bind_address;
-       ipt             peer_address;
+       in_addr_t       bind_address;
+       in_addr_t       peer_address;

        int             send_garp;                      // Set to true to garp for vip address on startup
 
        int             target_uid;
        int             send_garp;                      // Set to true to garp for vip address on startup
 
        int             target_uid;


@@ -442,14 +453,15 @@ typedef struct
        int             next_tbf;                       // Next HTB id available to use
        int             scheduler_fifo;                 // If the system has multiple CPUs, use FIFO scheduling policy for this process.
        int             lock_pages;                     // Lock pages into memory.
        int             next_tbf;                       // Next HTB id available to use
        int             scheduler_fifo;                 // If the system has multiple CPUs, use FIFO scheduling policy for this process.
        int             lock_pages;                     // Lock pages into memory.

-       int             icmp_rate;                      // Max number of ICMP unreachable per second to send>
+       int             icmp_rate;                      // Max number of ICMP unreachable per second to send
+       int             max_packets;                    // DoS prevention: per session limit of packets/0.1s

 
 

-       u32             cluster_address;                // Multicast address of cluster.
+       in_addr_t       cluster_address;                // Multicast address of cluster.

                                                        // Send to this address to have everyone hear.
        char            cluster_interface[64];          // Which interface to listen for multicast on.
        int             cluster_iam_master;             // Are we the cluster master???
        int             cluster_iam_uptodate;           // Set if we've got a full set of state from the master.
                                                        // Send to this address to have everyone hear.
        char            cluster_interface[64];          // Which interface to listen for multicast on.
        int             cluster_iam_master;             // Are we the cluster master???
        int             cluster_iam_uptodate;           // Set if we've got a full set of state from the master.

-       u32             cluster_master_address;         // The network address of the cluster master.
+       in_addr_t       cluster_master_address;         // The network address of the cluster master.

                                                        // Zero if i am the cluster master.
        int             cluster_seq_number;             // Sequence number of the next heartbeat we'll send out
                                                        // (or the seq number we're next expecting if we're a slave).
                                                        // Zero if i am the cluster master.
        int             cluster_seq_number;             // Sequence number of the next heartbeat we'll send out
                                                        // (or the seq number we're next expecting if we're a slave).


@@ -462,16 +474,17 @@ typedef struct
 
        int             cluster_hb_interval;            // How often to send a heartbeat.
        int             cluster_hb_timeout;             // How many missed heartbeats trigger an election.
 
        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

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

-       u16             as_number;
+       uint16_t as_number;

        struct {
        struct {

-               char    name[64];
-               u16     as;
-               int     keepalive;
-               int     hold;
-       }               neighbour[BGP_NUM_PEERS];
+               char name[64];
+               uint16_t as;
+               int keepalive;
+               int hold;
+       } neighbour[BGP_NUM_PEERS];

 #endif
 } configt;
 
 #endif
 } configt;
 


@@ -486,15 +499,15 @@ typedef struct
 
 typedef struct
 {
 
 typedef struct
 {

-       u8 op;          // operation
+       uint8_t op;     // operation

 #define FILTER_PORT_OP_NONE    0 // all ports match
 #define FILTER_PORT_OP_EQ      1
 #define FILTER_PORT_OP_NEQ     2
 #define FILTER_PORT_OP_GT      3
 #define FILTER_PORT_OP_LT      4
 #define FILTER_PORT_OP_RANGE   5
 #define FILTER_PORT_OP_NONE    0 // all ports match
 #define FILTER_PORT_OP_EQ      1
 #define FILTER_PORT_OP_NEQ     2
 #define FILTER_PORT_OP_GT      3
 #define FILTER_PORT_OP_LT      4
 #define FILTER_PORT_OP_RANGE   5

-       portt port;
-       portt port2;    // for range
+       uint16_t port;  // port (host byte order)
+       uint16_t port2; // range

 } ip_filter_portt;
 
 typedef struct
 } ip_filter_portt;
 
 typedef struct


@@ -502,18 +515,21 @@ typedef struct
        int action;             // permit/deny
 #define FILTER_ACTION_DENY     1
 #define FILTER_ACTION_PERMIT   2
        int action;             // permit/deny
 #define FILTER_ACTION_DENY     1
 #define FILTER_ACTION_PERMIT   2

-       int proto;              // protocol: IPPROTO_* (netinet/in.h)
-       ipt src_ip;             // source ip
-       ipt src_wild;
+       uint8_t proto;          // protocol: IPPROTO_* (netinet/in.h)
+       in_addr_t src_ip;       // source ip (network byte order)
+       in_addr_t src_wild;

        ip_filter_portt src_ports;
        ip_filter_portt src_ports;

-       ipt dst_ip;             // dest ip
-       ipt dst_wild;
+       in_addr_t dst_ip;       // dest ip
+       in_addr_t dst_wild;

        ip_filter_portt dst_ports;
        ip_filter_portt dst_ports;

-       u8 tcp_flag_op;         // match type: any, all
-#define FILTER_FLAG_OP_ANY     0
-#define FILTER_FLAG_OP_ALL     1
-       u8 tcp_sflags;          // flags set
-       u8 tcp_cflags;          // flags clear
+       uint8_t frag;           // apply to non-initial fragments
+       uint8_t tcp_flag_op;    // match type: any, all, established
+#define FILTER_FLAG_OP_ANY     1
+#define FILTER_FLAG_OP_ALL     2
+#define FILTER_FLAG_OP_EST     3
+       uint8_t tcp_sflags;     // flags set
+       uint8_t tcp_cflags;     // flags clear
+       uint32_t counter;       // match count

 } ip_filter_rulet;
 
 #define TCP_FLAG_FIN   0x01
 } ip_filter_rulet;
 
 #define TCP_FLAG_FIN   0x01


@@ -534,51 +550,53 @@ typedef struct
 } ip_filtert;
 
 // arp.c
 } ip_filtert;
 
 // arp.c

-void sendarp(int ifr_idx, const unsigned char* mac, ipt ip);
+void sendarp(int ifr_idx, const unsigned char* mac, in_addr_t ip);

 
 
 // ppp.c
 
 
 // ppp.c

-void processpap(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processchap(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processlcp(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processipcp(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processipin(tunnelidt t, sessionidt s, u8 * p, u16 l);
-void processccp(tunnelidt t, sessionidt s, u8 * p, u16 l);
+void 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 processipin(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);
 void sendchap(tunnelidt t, sessionidt s);

-u8 *makeppp(u8 * b, int size, u8 * p, int l, tunnelidt t, sessionidt s, u16 mtype);
+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 initlcp(tunnelidt t, sessionidt s);

-void send_ipin(sessionidt s, u8 * buf, int len);
+void send_ipin(sessionidt s, uint8_t *buf, int len);

 
 
 // radius.c
 void initrad(void);
 
 
 // radius.c
 void initrad(void);

-void radiussend(u16 r, u8 state);
-void processrad(u8 *buf, int len, char socket_index);
-void radiusretry(u16 r);
-u16 radiusnew(sessionidt s);
-void radiusclear(u16 r, sessionidt s);
+void radiussend(uint16_t r, uint8_t state);
+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);

 
 
 // l2tpns.c
 
 
 // l2tpns.c

-clockt backoff(u8 try);
-sessionidt sessionbyip(ipt ip);
+clockt backoff(uint8_t try);
+sessionidt sessionbyip(in_addr_t ip);

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

+void sessionkill(sessionidt s, char *reason);

 void sessionshutdown(sessionidt s, char *reason);
 void sessionshutdown(sessionidt s, char *reason);

-void send_garp(ipt ip);
-void tunnelsend(u8 * buf, u16 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);
 void sendipcp(tunnelidt t, sessionidt s);

-void processudp(u8 * buf, int len, struct sockaddr_in *addr);
-void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port);
+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);
+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 cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc);
 
 #undef LOG
 #undef LOG_HEX
 int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc);
 int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc);
 int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc);
 
 #undef LOG
 #undef LOG_HEX

-#define LOG(D, a, s, t, f, ...)        ({ if (D <= config->debug) _log(D, a, s, t, f, ## __VA_ARGS__); })
+#define LOG(D, s, t, f, ...)   ({ if (D <= config->debug) _log(D, s, t, f, ## __VA_ARGS__); })

 #define LOG_HEX(D, t, d, s)    ({ if (D <= config->debug) _log_hex(D, t, d, s); })
 
 #define LOG_HEX(D, t, d, s)    ({ if (D <= config->debug) _log_hex(D, t, d, s); })
 

-void _log(int level, ipt address, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 5, 6)));
+void _log(int level, sessionidt s, tunnelidt t, const char *format, ...) __attribute__((format (printf, 4, 5)));

 void _log_hex(int level, const char *title, const char *data, int maxsize);
 
 int sessionsetup(tunnelidt t, sessionidt s);
 void _log_hex(int level, const char *title, const char *data, int maxsize);
 
 int sessionsetup(tunnelidt t, sessionidt s);


@@ -597,12 +615,12 @@ int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
 
 
 // icmp.c
 
 
 // icmp.c

-void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len);
+void host_unreachable(in_addr_t destination, uint16_t id, in_addr_t source, char *packet, int packet_len);

 
 
 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)
 


@@ -611,12 +629,12 @@ if (count++ < max) { \
        void *array[20]; \
        char **strings; \
        int size, i; \
        void *array[20]; \
        char **strings; \
        int size, i; \

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

        size = backtrace(array, 10); \
        strings = backtrace_symbols(array, size); \
        if (strings) for (i = 0; i < size; i++) \
        { \
        size = backtrace(array, 10); \
        strings = backtrace_symbols(array, size); \
        if (strings) for (i = 0; i < size; i++) \
        { \

-               LOG(0, 0, 0, t, "%s\n", strings[i]); \
+               LOG(0, 0, t, "%s\n", strings[i]); \

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


@@ -625,10 +643,10 @@ 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 u32 last_id;
+extern uint32_t last_id;

 extern struct Tstats *_statistics;
 extern struct Tstats *_statistics;

-extern ipt my_address;
-extern int tun_write(u8 *data, int size);
+extern in_addr_t my_address;
+extern int tun_write(uint8_t *data, int size);

 extern int clifd;
 
 
 extern int clifd;