X-Git-Url: http://git.sameswireless.fr/l2tpns.git/blobdiff_plain/6fbc46c03b39ea91b3836d82399352dd3085ecd4..a0b6d7e32c083797822f7f04807b6846de45c456:/l2tpns.h

diff --git a/l2tpns.h b/l2tpns.h
index 25e8d3c..0278b89 100644
--- a/l2tpns.h
+++ b/l2tpns.h
@@ -1,5 +1,5 @@
 // L2TPNS Global Stuff
-// $Id: l2tpns.h,v 1.36 2004/11/25 02:45:27 bodea Exp $
+// $Id: l2tpns.h,v 1.41 2004/11/29 02:17:17 bodea Exp $
 
 #ifndef __L2TPNS_H__
 #define __L2TPNS_H__
@@ -124,6 +124,8 @@ struct cli_session_actions {
 	u16 snoop_port;
 	int throttle_in;
 	int throttle_out;
+	int filter_in;
+	int filter_out;
 };
 
 #define CLI_SESS_KILL		0x01
@@ -131,6 +133,8 @@ struct cli_session_actions {
 #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;
@@ -142,7 +146,7 @@ struct cli_tunnel_actions {
 #define DUMP_MAGIC "L2TPNS#" VERSION "#"
 
 // structures
-typedef struct routes           // route
+typedef struct			// route
 {
 	ipt ip;
 	ipt mask;
@@ -157,7 +161,7 @@ typedef struct controls         // control message
 }
 controlt;
 
-typedef struct sessions
+typedef struct
 {
 	sessionidt next;		// next session in linked list
 	sessionidt far;			// far end session ID
@@ -199,14 +203,18 @@ typedef struct sessions
 	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
+#define SF_CCP_ACKED	4	// CCP negotiated
 
-typedef struct {
+typedef struct
+{
 	u32	cin;
 	u32	cout;
 } sessioncountt;
@@ -215,7 +223,7 @@ typedef struct {
 #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
@@ -238,7 +246,7 @@ typedef struct tunnels
 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
@@ -269,7 +277,6 @@ struct Tringbuffer
 		char level;
 		sessionidt session;
 		tunnelidt tunnel;
-		ipt address;
 		char message[MAX_LOG_LENGTH];
 	} buffer[RINGBUFFER_SIZE];
 	int head;
@@ -392,7 +399,7 @@ struct Tstats
 #define SET_STAT(x, y)
 #endif
 
-struct configt
+typedef struct
 {
 	int		debug;				// debugging level
 	time_t		start_time;			// time when l2tpns was started
@@ -469,16 +476,68 @@ struct configt
 		int	hold;
 	}		neighbour[BGP_NUM_PEERS];
 #endif
-};
+} configt;
 
 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;
-};
+} 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);
@@ -516,16 +575,17 @@ void tunnelsend(u8 * buf, u16 l, tunnelidt t);
 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);
+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
-#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); })
 
-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);
@@ -558,18 +618,18 @@ if (count++ < max) { \
 	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++) \
 	{ \
-		LOG(0, 0, 0, t, "%s\n", strings[i]); \
+		LOG(0, 0, t, "%s\n", strings[i]); \
 	} \
 	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;