patch-1.3.86 linux/include/net/br.h

• Lines: 271
• Date: Tue Apr 9 14:36:31 1996
• Orig file: v1.3.85/linux/include/net/br.h
• Orig date: Thu Jan 1 02:00:00 1970

diff -u --recursive --new-file v1.3.85/linux/include/net/br.h linux/include/net/br.h
@@ -0,0 +1,270 @@
+/*
+ * Constants and structure definitions for the bridging code
+ */
+
+#if !defined(One)
+#define Zero    0
+#define One	1
+#endif  /* !defined(One) */
+
+#if !defined(TRUE)
+#define FALSE   0
+#define TRUE	1
+#endif /* !defined(TRUE) */
+
+/** port states. **/
+#define Disabled	0			  /* (4.4 5)	 */
+#define Listening	1			  /* (4.4.2)	 */
+#define Learning	2			  /* (4.4.3)	 */
+#define Forwarding	3			  /* (4 4 4)	 */
+#define Blocking	4			  /* (4.4.1)	 */
+
+#define No_of_ports 8
+/* arbitrary choice, to allow the code below to compile */
+
+#define All_ports (No_of_ports + 1)
+
+/*
+ * We time out our entries in the FDB after this many seconds.
+ */
+#define FDB_TIMEOUT	300
+
+/*
+ * the following defines are the initial values used when the 
+ * bridge is booted.  These may be overridden when this bridge is
+ * not the root bridge.  These are the reccomended default values 
+ * from the 802.1d specification.
+ */
+#define BRIDGE_MAX_AGE		20
+#define BRIDGE_HELLO_TIME	2
+#define BRIDGE_FORWARD_DELAY	15
+#define HOLD_TIME		1
+
+#define Default_path_cost 10
+
+/*
+ * minimum increment possible to avoid underestimating age, allows for BPDU
+ * transmission time
+ */
+#define Message_age_increment 1
+
+#define No_port 0
+/*
+ * reserved value for Bridge's root port parameter indicating no root port,
+ * used when Bridge is the root - also used to indicate the source when
+ * a frame is being generated by a higher layer protocol on this host
+ */
+
+/** Configuration BPDU Parameters (4.5.1) **/
+
+typedef struct {
+	union {
+		struct {
+			unsigned short priority;
+			unsigned char ula[6];
+		} p_u;
+		unsigned int id[2];
+	} bi;
+} bridge_id_t;
+
+#define BRIDGE_PRIORITY	bi.p_u.priority
+#define BRIDGE_ID_ULA	bi.p_u.ula
+#define BRIDGE_ID	bi.id
+
+typedef struct {
+	unsigned short	protocol_id;	
+	unsigned char	protocol_version_id;
+	unsigned char   type;
+	unsigned char   flags;
+#define TOPOLOGY_CHANGE		0x01
+#define TOPOLOGY_CHANGE_ACK	0x80
+	bridge_id_t      root_id;		  /* (4.5.1.1)	 */
+	unsigned int     root_path_cost;	  /* (4.5.1.2)	 */
+	bridge_id_t      bridge_id;		  /* (4.5.1.3)	 */
+	unsigned short   port_id;		  /* (4.5.1.4)	 */
+	unsigned short   message_age;		  /* (4.5.1.5)	 */
+	unsigned short   max_age;		  /* (4.5.1.6)	 */
+	unsigned short   hello_time;		  /* (4.5.1.7)	 */
+	unsigned short   forward_delay;		  /* (4.5.1.8)	 */
+} Config_bpdu;
+
+
+/** Topology Change Notification BPDU Parameters (4.5.2) **/
+
+typedef struct {
+	unsigned short	protocol_id;	
+	unsigned char	protocol_version_id;
+	unsigned char   type;
+} Tcn_bpdu;
+
+#define BPDU_TYPE_CONFIG	0
+#define BPDU_TYPE_TOPO_CHANGE	128
+
+/** Bridge Parameters (4.5.3) **/
+typedef struct {
+	bridge_id_t      designated_root;	  /* (4.5.3.1)	 */
+	unsigned int     root_path_cost;	  /* (4.5.3.2)	 */
+	unsigned int 	 root_port;		  /* (4.5.3.3)	 */
+	unsigned short   max_age;		  /* (4.5.3.4)	 */
+	unsigned short   hello_time;		  /* (4.5.3.5)	 */
+	unsigned short   forward_delay;		  /* (4.5.3.6)	 */
+	bridge_id_t      bridge_id;		  /* (4.5.3.7)	 */
+	unsigned short   bridge_max_age;	  /* (4.5.3.8)	 */
+	unsigned short   bridge_hello_time;	  /* (4.5.3.9)	 */
+	unsigned short   bridge_forward_delay;	  /* (4.5.3.10)	 */
+	unsigned int     topology_change_detected; /* (4.5.3.11) */
+	unsigned int     topology_change;	  /* (4.5.3.12)	 */
+	unsigned short   topology_change_time;	  /* (4.5.3.13)	 */
+	unsigned short   hold_time;		  /* (4.5.3.14)	 */
+	unsigned int     top_change;
+	unsigned int     top_change_detected;
+} Bridge_data;
+
+/** Port Parameters (4.5.5) **/
+typedef struct {
+	unsigned short   port_id;		  /* (4.5.5.1)	 */
+	unsigned int     state;			  /* (4.5.5.2)	 */
+	unsigned int     path_cost;		  /* (4.5.5.3)	 */
+	bridge_id_t      designated_root;	  /* (4.5.5.4)	 */
+	unsigned int     designated_cost;	  /* (4.5.5.5)	 */
+	bridge_id_t      designated_bridge;	  /* (4.5.5.6)	 */
+	unsigned short   designated_port;	  /* (4.5.5.7)	 */
+	unsigned int     top_change_ack;	  /* (4.5.5.8)	 */
+	unsigned int     config_pending;	  /* (4.5.5.9)	 */
+	struct device *dev;	
+	struct fdb *fdb;	/* head of per port fdb chain */
+} Port_data;
+
+
+
+/** types to support timers for this pseudo-implementation. **/
+typedef struct {
+	unsigned int     active;			  /* timer in use. */
+	unsigned int     value;			  /* current value of timer,
+						   * counting up. */
+} Timer;
+
+struct fdb {
+	unsigned char ula[6];
+	unsigned char pad[2];
+	unsigned short port;
+	unsigned int timer;
+	unsigned int flags;
+#define FDB_ENT_VALID	0x01
+/* AVL tree of all addresses, sorted by address */
+	short fdb_avl_height;
+	struct fdb *fdb_avl_left;
+	struct fdb *fdb_avl_right;
+/* linked list of addresses for each port */
+	struct fdb *fdb_next;
+};
+
+#define IS_BRIDGED	0x2e
+
+struct br_stat {
+	unsigned int flags;
+	Bridge_data bridge_data;
+	Port_data port_data[No_of_ports];
+};
+
+/* defined flags for br_stat.flags */
+#define BR_UP		0x0001	/* bridging enabled */
+#define BR_DEBUG	0x0002	/* debugging enabled */
+
+struct br_cf {
+	unsigned int cmd;
+	unsigned int arg1;
+	unsigned int arg2;
+};
+
+/* defined cmds */
+#define	BRCMD_BRIDGE_ENABLE	1
+#define	BRCMD_BRIDGE_DISABLE	2
+#define	BRCMD_PORT_ENABLE	3	/* arg1 = port */
+#define	BRCMD_PORT_DISABLE	4	/* arg1 = port */
+#define	BRCMD_SET_BRIDGE_PRIORITY	5	/* arg1 = priority */
+#define	BRCMD_SET_PORT_PRIORITY	6	/* arg1 = port, arg2 = priority */
+#define	BRCMD_SET_PATH_COST	7	/* arg1 = port, arg2 = cost */
+#define	BRCMD_DISPLAY_FDB	8	/* arg1 = port */
+#define	BRCMD_ENABLE_DEBUG	9
+#define	BRCMD_DISABLE_DEBUG	10
+
+/* prototypes of all bridging functions... */
+
+void transmit_config(int port_no);
+int root_bridge(void);
+int supersedes_port_info(int port_no, Config_bpdu *config);
+void record_config_information(int port_no, Config_bpdu *config);
+void record_config_timeout_values(Config_bpdu *config);
+void config_bpdu_generation(void);
+int designated_port(int port_no);
+void reply(int port_no);
+void transmit_tcn(void);
+void configuration_update(void);
+void root_selection(void);
+void designated_port_selection(void);
+void become_designated_port(int port_no);
+void port_state_selection(void);
+void make_forwarding(int port_no);
+void topology_change_detection(void);
+void topology_change_acknowledged(void);
+void acknowledge_topology_change(int port_no);
+void make_blocking(int port_no);
+void set_port_state(int port_no, int state);
+void received_config_bpdu(int port_no, Config_bpdu *config);
+void received_tcn_bpdu(int port_no, Tcn_bpdu *tcn);
+void hello_timer_expiry(void);
+void message_age_timer_expiry(int port_no);
+void forward_delay_timer_expiry(int port_no);
+int designated_for_some_port(void);
+void tcn_timer_expiry(void);
+void topology_change_timer_expiry(void);
+void hold_timer_expiry(int port_no);
+void br_init(void);
+void br_init_port(int port_no);
+void enable_port(int port_no);
+void disable_port(int port_no);
+void set_bridge_priority(bridge_id_t *new_bridge_id);
+void set_port_priority(int port_no, unsigned short new_port_id);
+void set_path_cost(int port_no, unsigned short path_cost);
+void start_hello_timer(void);
+void stop_hello_timer(void);
+int hello_timer_expired(void);
+void start_tcn_timer(void);
+void stop_tcn_timer(void);
+int tcn_timer_expired(void);
+void start_topology_change_timer(void);
+void stop_topology_change_timer(void);
+int topology_change_timer_expired(void);
+void start_message_age_timer(int port_no, unsigned short message_age);
+void stop_message_age_timer(int port_no);
+int message_age_timer_expired(int port_no);
+void start_forward_delay_timer(int port_no);
+void stop_forward_delay_timer(int port_no);
+int forward_delay_timer_expired(int port_no);
+void start_hold_timer(int port_no);
+void stop_hold_timer(int port_no);
+int hold_timer_expired(int port_no);
+
+struct fdb *br_avl_find_addr(unsigned char addr[6]);
+int br_avl_insert (struct fdb * new_node);
+int br_avl_remove (struct fdb * node_to_delete);
+
+int send_tcn_bpdu(int port_no, Tcn_bpdu *bpdu);
+int send_config_bpdu(int port_no, Config_bpdu *config_bpdu);
+int find_port(struct device *dev);
+int br_flood(struct sk_buff *skb, int port);
+int br_drop(struct sk_buff *skb);
+int br_learn(struct sk_buff *skb, int port);	/* 3.8 */
+
+int br_receive_frame(struct sk_buff *skb);	/* 3.5 */
+int br_tx_frame(struct sk_buff *skb);
+int br_ioctl(unsigned int cmd, void *arg);
+
+void free_fdb(struct fdb *);
+struct fdb *get_fdb(void);
+
+/* externs */
+
+extern struct br_stat br_stats;
+