drop "Session N is closing" message level to 4; don't process PPPIP packets in this...

[l2tpns.git] / l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index ddc0884..a0026ae 100644 (file)
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
 // L2TPNS Global Stuff

-// $Id: l2tpns.h,v 1.32 2004/11/10 03:30:29 bodea Exp $
+// $Id: l2tpns.h,v 1.45 2004/12/03 06:40:02 bodea Exp $

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


@@ -15,7 +15,7 @@
 #include <sys/types.h>
 #include <libcli.h>
 
 #include <sys/types.h>
 #include <libcli.h>
 

-#define VERSION        "2.0.5"
+#define VERSION        "2.0.13"

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


@@ -109,6 +109,7 @@ enum
 // Types
 typedef unsigned short u16;
 typedef unsigned int u32;
 // Types
 typedef unsigned short u16;
 typedef unsigned int u32;

+typedef unsigned long long u64;

 typedef unsigned char u8;
 typedef u32 ipt;
 typedef u16 portt;
 typedef unsigned char u8;
 typedef u32 ipt;
 typedef u16 portt;


@@ -124,6 +125,8 @@ struct cli_session_actions {
        u16 snoop_port;
        int throttle_in;
        int throttle_out;
        u16 snoop_port;
        int throttle_in;
        int throttle_out;

+       int filter_in;
+       int filter_out;

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


@@ -131,6 +134,8 @@ 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;


@@ -142,7 +147,7 @@ struct cli_tunnel_actions {
 #define DUMP_MAGIC "L2TPNS#" VERSION "#"
 
 // structures
 #define DUMP_MAGIC "L2TPNS#" VERSION "#"
 
 // structures

-typedef struct routes           // route
+typedef struct                 // route

 {
        ipt ip;
        ipt mask;
 {
        ipt ip;
        ipt mask;


@@ -157,7 +162,7 @@ typedef struct controls         // control message
 }
 controlt;
 
 }
 controlt;
 

-typedef struct sessions
+typedef struct

 {
        sessionidt next;                // next session in linked list
        sessionidt far;                 // far end session ID
 {
        sessionidt next;                // next session in linked list
        sessionidt far;                 // far end session ID


@@ -199,14 +204,18 @@ typedef struct sessions
        ipt snoop_ip;                   // Interception destination IP
        u16 snoop_port;                 // Interception destination port
        u16 sid;                        // near end session id.
        ipt snoop_ip;                   // Interception destination IP
        u16 snoop_port;                 // Interception destination port
        u16 sid;                        // near end session id.

-       char reserved[20];              // Space to expand structure without changing HB_VERSION
+       u8 filter_in;                   // input filter index (to ip_filters[N-1]; 0 if none)
+       u8 filter_out;                  // output filter index
+       char reserved[18];              // Space to expand structure without changing HB_VERSION

 }
 sessiont;
 
 #define SF_IPCP_ACKED  1       // Has this session seen an IPCP Ack?
 #define SF_LCP_ACKED   2       // LCP negotiated
 }
 sessiont;
 
 #define SF_IPCP_ACKED  1       // Has this session seen an IPCP Ack?
 #define SF_LCP_ACKED   2       // LCP negotiated

+#define SF_CCP_ACKED   4       // CCP negotiated

 
 

-typedef struct {
+typedef struct
+{

        u32     cin;
        u32     cout;
 } sessioncountt;
        u32     cin;
        u32     cout;
 } sessioncountt;


@@ -215,7 +224,7 @@ typedef struct {
 #define        SESSIONACFC     2       // ACFC negotiated flags
 
 // 168 bytes per tunnel
 #define        SESSIONACFC     2       // ACFC negotiated flags
 
 // 168 bytes per tunnel

-typedef struct tunnels
+typedef struct

 {
        tunnelidt far;          // far end tunnel ID
        ipt ip;                 // Ip for far end
 {
        tunnelidt far;          // far end tunnel ID
        ipt ip;                 // Ip for far end


@@ -238,7 +247,7 @@ typedef struct tunnels
 tunnelt;
 
 // 180 bytes per radius session
 tunnelt;
 
 // 180 bytes per radius session

-typedef struct radiuss         // outstanding RADIUS requests
+typedef struct                 // outstanding RADIUS requests

 {
        sessionidt session;     // which session this applies to
        hasht auth;             // request authenticator
 {
        sessionidt session;     // which session this applies to
        hasht auth;             // request authenticator


@@ -269,7 +278,6 @@ 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;


@@ -392,7 +400,7 @@ struct Tstats
 #define SET_STAT(x, y)
 #endif
 
 #define SET_STAT(x, y)
 #endif
 

-struct configt
+typedef struct

 {
        int             debug;                          // debugging level
        time_t          start_time;                     // time when l2tpns was started
 {
        int             debug;                          // debugging level
        time_t          start_time;                     // time when l2tpns was started


@@ -458,22 +466,80 @@ struct configt
 
        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.

+       u64             cluster_table_version;          // # state changes processed by cluster

 
 #ifdef BGP
 
 #ifdef BGP

+#define BGP_NUM_PEERS  2

        u16             as_number;
        u16             as_number;

-       char            bgp_peer[2][64];
-       u16             bgp_peer_as[2];
+       struct {
+               char    name[64];
+               u16     as;
+               int     keepalive;
+               int     hold;
+       }               neighbour[BGP_NUM_PEERS];

 #endif
 #endif

-};
+} configt;

 
 enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC };
 
 enum config_typet { INT, STRING, UNSIGNED_LONG, SHORT, BOOL, IP, MAC };

-struct config_descriptt
+typedef struct

 {
        char *key;
        int offset;
        int size;
        enum config_typet type;
 {
        char *key;
        int offset;
        int size;
        enum config_typet type;

-};
+} config_descriptt;
+
+typedef struct
+{
+       u8 op;          // operation
+#define FILTER_PORT_OP_NONE    0 // all ports match
+#define FILTER_PORT_OP_EQ      1
+#define FILTER_PORT_OP_NEQ     2
+#define FILTER_PORT_OP_GT      3
+#define FILTER_PORT_OP_LT      4
+#define FILTER_PORT_OP_RANGE   5
+       portt port;     // port (host byte order)
+       portt port2;    // range
+} ip_filter_portt;
+
+typedef struct
+{
+       int action;             // permit/deny
+#define FILTER_ACTION_DENY     1
+#define FILTER_ACTION_PERMIT   2
+       u8 proto;               // protocol: IPPROTO_* (netinet/in.h)
+       ipt src_ip;             // source ip (network byte order)
+       ipt src_wild;
+       ip_filter_portt src_ports;
+       ipt dst_ip;             // dest ip
+       ipt dst_wild;
+       ip_filter_portt dst_ports;
+       u8 frag;                // apply to non-initial fragments
+       u8 tcp_flag_op;         // match type: any, all, established
+#define FILTER_FLAG_OP_ANY     1
+#define FILTER_FLAG_OP_ALL     2
+#define FILTER_FLAG_OP_EST     3
+       u8 tcp_sflags;          // flags set
+       u8 tcp_cflags;          // flags clear
+       u32 counter;            // match count
+} ip_filter_rulet;
+
+#define TCP_FLAG_FIN   0x01
+#define TCP_FLAG_SYN   0x02
+#define TCP_FLAG_RST   0x04
+#define TCP_FLAG_PSH   0x08
+#define TCP_FLAG_ACK   0x10
+#define TCP_FLAG_URG   0x20
+
+#define MAXFILTER              32
+#define MAXFILTER_RULES                32
+typedef struct
+{
+       char name[32];          // ACL name
+       int extended;           // type: 0 = standard, 1 = extended
+       ip_filter_rulet rules[MAXFILTER_RULES];
+       int used;               // session ref count
+} ip_filtert;

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


@@ -488,9 +554,8 @@ void processipin(tunnelidt t, sessionidt s, u8 * p, u16 l);
 void processccp(tunnelidt t, sessionidt s, u8 * p, u16 l);
 void sendchap(tunnelidt t, sessionidt s);
 u8 *makeppp(u8 * b, int size, u8 * p, int l, tunnelidt t, sessionidt s, u16 mtype);
 void processccp(tunnelidt t, sessionidt s, u8 * p, u16 l);
 void sendchap(tunnelidt t, sessionidt s);
 u8 *makeppp(u8 * b, int size, u8 * p, int l, tunnelidt t, sessionidt s, u16 mtype);

-u8 *findppp(u8 * b, u8 mtype);

 void initlcp(tunnelidt t, sessionidt s);
 void initlcp(tunnelidt t, sessionidt s);

-void dumplcp(u8 *p, int l);
+void send_ipin(sessionidt s, u8 * buf, int len);

 
 
 // radius.c
 
 
 // radius.c


@@ -503,77 +568,47 @@ void radiusclear(u16 r, sessionidt s);
 
 
 // l2tpns.c
 
 
 // l2tpns.c

-clockt now(void);

 clockt backoff(u8 try);
 clockt backoff(u8 try);

-void routeset(sessionidt, ipt ip, ipt mask, ipt gw, u8 add);
-void inittun(void);
-void initudp(void);
-void initdata(int optdebug, char *optconfig);
-void initippool();

 sessionidt sessionbyip(ipt ip);
 sessionidt sessionbyuser(char *username);
 void sessionshutdown(sessionidt s, char *reason);
 sessionidt sessionbyip(ipt ip);
 sessionidt sessionbyuser(char *username);
 void sessionshutdown(sessionidt s, char *reason);

-void sessionsendarp(sessionidt s);

 void send_garp(ipt ip);
 void send_garp(ipt ip);

-void sessionkill(sessionidt s, char *reason);
-void control16(controlt * c, u16 avp, u16 val, u8 m);
-void control32(controlt * c, u16 avp, u32 val, u8 m);
-void controls(controlt * c, u16 avp, char *val, u8 m);
-void controlb(controlt * c, u16 avp, char *val, unsigned int len, u8 m);
-controlt *controlnew(u16 mtype);
-void controlnull(tunnelidt t);
-void controladd(controlt * c, tunnelidt t, sessionidt s);

 void tunnelsend(u8 * buf, u16 l, tunnelidt t);
 void tunnelsend(u8 * buf, u16 l, tunnelidt t);

-void tunnelkill(tunnelidt t, char *reason);
-void tunnelshutdown(tunnelidt t, char *reason);

 void sendipcp(tunnelidt t, sessionidt s);
 void sendipcp(tunnelidt t, sessionidt s);

-void processipout(u8 * buf, int len);
-void processarp(u8 * buf, int len);

 void processudp(u8 * buf, int len, struct sockaddr_in *addr);
 void processudp(u8 * buf, int len, struct sockaddr_in *addr);

-void processtun(u8 * buf, int len);
-void processcontrol(u8 * buf, int len, struct sockaddr_in *addr);
-int assign_ip_address(sessionidt s);
-void free_ip_address(sessionidt s);

 void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port);
 void snoop_send_packet(char *packet, u16 size, ipt destination, u16 port);

-void dump_acct_info();
-void mainloop(void);
+int ip_filter(u8 *buf, int len, u8 filter);

 int cmd_show_ipcache(struct cli_def *cli, char *command, char **argv, int argc);
 int cmd_show_hist_idle(struct cli_def *cli, char *command, char **argv, int argc);
 int cmd_show_hist_open(struct cli_def *cli, char *command, char **argv, int argc);
 
 #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);
 
 void _log_hex(int level, const char *title, const char *data, int maxsize);
 

-void build_chap_response(char *challenge, u8 id, u16 challenge_length, char **challenge_response);

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

-int cluster_send_session(int s);
-int cluster_send_tunnel(int t);
-int cluster_send_goodbye();
-void init_cli(char *hostname);
-void cli_do_file(FILE *fh);
-void cli_do(int sockfd);
-int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
-#ifdef RINGBUFFER
-void ringbuffer_dump(FILE *stream);
-#endif
-void initplugins(void);

 int run_plugins(int plugin_type, void *data);
 int run_plugins(int plugin_type, void *data);

-void add_plugin(char *plugin_name);
-void remove_plugin(char *plugin_name);
-void plugins_done(void);
-void tunnelclear(tunnelidt t);
-void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len);
-void fix_address_pool(int sid);

 void rebuild_address_pool(void);
 void rebuild_address_pool(void);

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

 void throttle_session(sessionidt s, int rate_in, int rate_out);
 int load_session(sessionidt, sessiont *);
 void become_master(void);      // We're the master; kick off any required master initializations.
 void throttle_session(sessionidt s, int rate_in, int rate_out);
 int load_session(sessionidt, sessiont *);
 void become_master(void);      // We're the master; kick off any required master initializations.

+
+
+// cli.c
+void init_cli(char *hostname);
+void cli_do_file(FILE *fh);
+void cli_do(int sockfd);
+int cli_arg_help(struct cli_def *cli, int cr_ok, char *entry, ...);
+
+
+// icmp.c
+void host_unreachable(ipt destination, u16 id, ipt source, char *packet, int packet_len);
+
+

 extern tunnelt *tunnel;
 extern sessiont *session;
 extern sessioncountt *sess_count;
 extern tunnelt *tunnel;
 extern sessiont *session;
 extern sessioncountt *sess_count;


@@ -585,18 +620,18 @@ 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); \
 }
 
 

-extern struct configt *config;
+extern configt *config;

 extern time_t basetime;                // Time when this process started.
 extern time_t time_now;                // Seconds since EPOCH.
 extern u32 last_id;
 extern time_t basetime;                // Time when this process started.
 extern time_t time_now;                // Seconds since EPOCH.
 extern u32 last_id;