diff options
Diffstat (limited to 'pfinet/linux-src/include/net/br.h')
| -rw-r--r-- | pfinet/linux-src/include/net/br.h | 305 |
1 files changed, 305 insertions, 0 deletions
diff --git a/pfinet/linux-src/include/net/br.h b/pfinet/linux-src/include/net/br.h new file mode 100644 index 00000000..4d79fc62 --- /dev/null +++ b/pfinet/linux-src/include/net/br.h @@ -0,0 +1,305 @@ +/* + * 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 20 /* JRP: 20s as NSC bridge code, was 300 for Linux */ + +/* + * 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 recommended 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 + +/* broacast/multicast storm limitation. This per source. */ +#define MAX_MCAST_PER_PERIOD 4 +#define MCAST_HOLD_TIME (10*HZ/100) + +#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 + +/* JRP: on the network the flags field is between "type" and "root_id" + * this is unfortunated! To make the code portable to a RISC machine + * the pdus are now massaged a little bit for processing + */ +#define TOPOLOGY_CHANGE 0x01 +#define TOPOLOGY_CHANGE_ACK 0x80 +#define BRIDGE_BPDU_8021_CONFIG_SIZE 35 /* real size */ +#define BRIDGE_BPDU_8021_CONFIG_FLAG_OFFSET 4 +#define BRIDGE_BPDU_8021_PROTOCOL_ID 0 +#define BRIDGE_BPDU_8021_PROTOCOL_VERSION_ID 0 +#define BRIDGE_LLC1_HS 3 +#define BRIDGE_LLC1_DSAP 0x42 +#define BRIDGE_LLC1_SSAP 0x42 +#define BRIDGE_LLC1_CTRL 0x03 + +typedef struct { + unsigned short protocol_id; + unsigned char protocol_version_id; + unsigned char type; + 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) */ + unsigned char top_change_ack; + unsigned char top_change; +} Config_bpdu; + +#ifdef __LITTLE_ENDIAN +#define config_bpdu_hton(config_bpdu) \ + (config_bpdu)->root_path_cost = htonl((config_bpdu)->root_path_cost); \ + (config_bpdu)->port_id = htons((config_bpdu)->port_id); \ + (config_bpdu)->message_age = htons((config_bpdu)->message_age); \ + (config_bpdu)->max_age = htons((config_bpdu)->max_age); \ + (config_bpdu)->hello_time = htons((config_bpdu)->hello_time); \ + (config_bpdu)->forward_delay = htons((config_bpdu)->forward_delay); +#else +#define config_bpdu_hton(config_bpdu) +#endif +#define config_bpdu_ntoh config_bpdu_hton + + +/** 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 top_change_detected; /* (4.5.3.11) */ + unsigned int top_change; /* (4.5.3.12) */ + unsigned short topology_change_time; /* (4.5.3.13) */ + unsigned short hold_time; /* (4.5.3.14) */ +} 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 short flags; +#define FDB_ENT_VALID 0x01 + unsigned short mcast_count; + unsigned int mcast_timer; /* oldest xxxxxcast */ + +/* 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; +}; + +/* data returned on BRCMD_DISPLAY_FDB */ +struct fdb_info { + unsigned char ula[6]; + unsigned char port; + unsigned char flags; + unsigned int timer; +}; +struct fdb_info_hdr { + int copied; /* nb of entries copied to user */ + int not_copied; /* when user buffer is too small */ + int cmd_time; +}; + +#define IS_BRIDGED 0x2e + + +#define BR_MAX_PROTOCOLS 32 +#define BR_MAX_PROT_STATS BR_MAX_PROTOCOLS + +/* policy values for policy field */ +#define BR_ACCEPT 1 +#define BR_REJECT 0 + +/* JRP: extra statistics for debug */ +typedef struct { + /* br_receive_frame counters */ + int port_disable_up_stack; + int rcv_bpdu; + int notForwarding; + int forwarding_up_stack; + int unknown_state; + + /* br_tx_frame counters */ + int port_disable; + int port_not_disable; + + /* br_forward counters */ + int local_multicast; + int forwarded_multicast; /* up stack as well */ + int flood_unicast; + int aged_flood_unicast; + int forwarded_unicast; + int forwarded_unicast_up_stack; + int forwarded_ip_up_stack; + int forwarded_ip_up_stack_lie; /* received on alternate device */ + int arp_for_local_mac; + int drop_same_port; + int drop_same_port_aged; + int drop_multicast; +} br_stats_counter; + +struct br_stat { + unsigned int flags; + Bridge_data bridge_data; + Port_data port_data[No_of_ports]; + unsigned int policy; + unsigned int exempt_protocols; + unsigned short protocols[BR_MAX_PROTOCOLS]; + unsigned short prot_id[BR_MAX_PROT_STATS]; /* Protocol encountered */ + unsigned int prot_counter[BR_MAX_PROT_STATS]; /* How many packets ? */ + br_stats_counter packet_cnts; +}; + +/* defined flags for br_stat.flags */ +#define BR_UP 0x0001 /* bridging enabled */ +#define BR_DEBUG 0x0002 /* debugging enabled */ +#define BR_PROT_STATS 0x0004 /* protocol statistics enabled */ +#define BR_STP_DISABLED 0x0008 /* Spanning tree protocol disabled */ + +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 +#define BRCMD_SET_POLICY 11 /* arg1 = default policy (1==bridge all) */ +#define BRCMD_EXEMPT_PROTOCOL 12 /* arg1 = protocol (see net/if_ether.h) */ +#define BRCMD_ENABLE_PROT_STATS 13 +#define BRCMD_DISABLE_PROT_STATS 14 +#define BRCMD_ZERO_PROT_STATS 15 +#define BRCMD_TOGGLE_STP 16 + +/* prototypes of exported bridging functions... */ + +void br_init(void); +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); +int br_protocol_ok(unsigned short protocol); +void requeue_fdb(struct fdb *node, int new_port); + +struct fdb *br_avl_find_addr(unsigned char addr[6]); +struct fdb *br_avl_insert (struct fdb * new_node); +void sprintf_avl (char **pbuffer, struct fdb * tree, off_t *pos,int* len, off_t offset, int length); +int br_tree_get_info(char *buffer, char **start, off_t offset, int length, int dummy); +void br_avl_delete_by_port(int port); +/* externs */ + +extern struct br_stat br_stats; +extern Port_data port_info[]; + |