1 /* 2 * Lec arp cache 3 * 4 * Marko Kiiskila <mkiiskila@yahoo.com> 5 */ 6 #ifndef _LEC_ARP_H_ 7 #define _LEC_ARP_H_ 8 #include <linux/atm.h> 9 #include <linux/atmdev.h> 10 #include <linux/if_ether.h> 11 #include <linux/atmlec.h> 12 13 struct lec_arp_table { 14 struct hlist_node next; /* Linked entry list */ 15 unsigned char atm_addr[ATM_ESA_LEN]; /* Atm address */ 16 unsigned char mac_addr[ETH_ALEN]; /* Mac address */ 17 int is_rdesc; /* Mac address is a route descriptor */ 18 struct atm_vcc *vcc; /* Vcc this entry is attached */ 19 struct atm_vcc *recv_vcc; /* Vcc we receive data from */ 20 21 void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb); 22 /* Push that leads to daemon */ 23 24 void (*old_recv_push) (struct atm_vcc *vcc, struct sk_buff *skb); 25 /* Push that leads to daemon */ 26 27 unsigned long last_used; /* For expiry */ 28 unsigned long timestamp; /* Used for various timestamping things: 29 * 1. FLUSH started 30 * (status=ESI_FLUSH_PENDING) 31 * 2. Counting to 32 * max_unknown_frame_time 33 * (status=ESI_ARP_PENDING|| 34 * status=ESI_VC_PENDING) 35 */ 36 unsigned char no_tries; /* No of times arp retry has been tried */ 37 unsigned char status; /* Status of this entry */ 38 unsigned short flags; /* Flags for this entry */ 39 unsigned short packets_flooded; /* Data packets flooded */ 40 unsigned long flush_tran_id; /* Transaction id in flush protocol */ 41 struct timer_list timer; /* Arping timer */ 42 struct lec_priv *priv; /* Pointer back */ 43 u8 *tlvs; 44 u32 sizeoftlvs; /* 45 * LANE2: Each MAC address can have TLVs 46 * associated with it. sizeoftlvs tells the 47 * the length of the tlvs array 48 */ 49 struct sk_buff_head tx_wait; /* wait queue for outgoing packets */ 50 atomic_t usage; /* usage count */ 51 }; 52 53 /* 54 * LANE2: Template tlv struct for accessing 55 * the tlvs in the lec_arp_table->tlvs array 56 */ 57 struct tlv { 58 u32 type; 59 u8 length; 60 u8 value[255]; 61 }; 62 63 /* Status fields */ 64 #define ESI_UNKNOWN 0 /* 65 * Next packet sent to this mac address 66 * causes ARP-request to be sent 67 */ 68 #define ESI_ARP_PENDING 1 /* 69 * There is no ATM address associated with this 70 * 48-bit address. The LE-ARP protocol is in 71 * progress. 72 */ 73 #define ESI_VC_PENDING 2 /* 74 * There is a valid ATM address associated with 75 * this 48-bit address but there is no VC set 76 * up to that ATM address. The signaling 77 * protocol is in process. 78 */ 79 #define ESI_FLUSH_PENDING 4 /* 80 * The LEC has been notified of the FLUSH_START 81 * status and it is assumed that the flush 82 * protocol is in process. 83 */ 84 #define ESI_FORWARD_DIRECT 5 /* 85 * Either the Path Switching Delay (C22) has 86 * elapsed or the LEC has notified the Mapping 87 * that the flush protocol has completed. In 88 * either case, it is safe to forward packets 89 * to this address via the data direct VC. 90 */ 91 92 /* Flag values */ 93 #define LEC_REMOTE_FLAG 0x0001 94 #define LEC_PERMANENT_FLAG 0x0002 95 96 #endif /* _LEC_ARP_H_ */ 97