1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Lec arp cache 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Marko Kiiskila <mkiiskila@yahoo.com> 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun #ifndef _LEC_ARP_H_ 8*4882a593Smuzhiyun #define _LEC_ARP_H_ 9*4882a593Smuzhiyun #include <linux/atm.h> 10*4882a593Smuzhiyun #include <linux/atmdev.h> 11*4882a593Smuzhiyun #include <linux/if_ether.h> 12*4882a593Smuzhiyun #include <linux/atmlec.h> 13*4882a593Smuzhiyun 14*4882a593Smuzhiyun struct lec_arp_table { 15*4882a593Smuzhiyun struct hlist_node next; /* Linked entry list */ 16*4882a593Smuzhiyun unsigned char atm_addr[ATM_ESA_LEN]; /* Atm address */ 17*4882a593Smuzhiyun unsigned char mac_addr[ETH_ALEN]; /* Mac address */ 18*4882a593Smuzhiyun int is_rdesc; /* Mac address is a route descriptor */ 19*4882a593Smuzhiyun struct atm_vcc *vcc; /* Vcc this entry is attached */ 20*4882a593Smuzhiyun struct atm_vcc *recv_vcc; /* Vcc we receive data from */ 21*4882a593Smuzhiyun 22*4882a593Smuzhiyun void (*old_push) (struct atm_vcc *vcc, struct sk_buff *skb); 23*4882a593Smuzhiyun /* Push that leads to daemon */ 24*4882a593Smuzhiyun 25*4882a593Smuzhiyun void (*old_recv_push) (struct atm_vcc *vcc, struct sk_buff *skb); 26*4882a593Smuzhiyun /* Push that leads to daemon */ 27*4882a593Smuzhiyun 28*4882a593Smuzhiyun unsigned long last_used; /* For expiry */ 29*4882a593Smuzhiyun unsigned long timestamp; /* Used for various timestamping things: 30*4882a593Smuzhiyun * 1. FLUSH started 31*4882a593Smuzhiyun * (status=ESI_FLUSH_PENDING) 32*4882a593Smuzhiyun * 2. Counting to 33*4882a593Smuzhiyun * max_unknown_frame_time 34*4882a593Smuzhiyun * (status=ESI_ARP_PENDING|| 35*4882a593Smuzhiyun * status=ESI_VC_PENDING) 36*4882a593Smuzhiyun */ 37*4882a593Smuzhiyun unsigned char no_tries; /* No of times arp retry has been tried */ 38*4882a593Smuzhiyun unsigned char status; /* Status of this entry */ 39*4882a593Smuzhiyun unsigned short flags; /* Flags for this entry */ 40*4882a593Smuzhiyun unsigned short packets_flooded; /* Data packets flooded */ 41*4882a593Smuzhiyun unsigned long flush_tran_id; /* Transaction id in flush protocol */ 42*4882a593Smuzhiyun struct timer_list timer; /* Arping timer */ 43*4882a593Smuzhiyun struct lec_priv *priv; /* Pointer back */ 44*4882a593Smuzhiyun u8 *tlvs; 45*4882a593Smuzhiyun u32 sizeoftlvs; /* 46*4882a593Smuzhiyun * LANE2: Each MAC address can have TLVs 47*4882a593Smuzhiyun * associated with it. sizeoftlvs tells 48*4882a593Smuzhiyun * the length of the tlvs array 49*4882a593Smuzhiyun */ 50*4882a593Smuzhiyun struct sk_buff_head tx_wait; /* wait queue for outgoing packets */ 51*4882a593Smuzhiyun refcount_t usage; /* usage count */ 52*4882a593Smuzhiyun }; 53*4882a593Smuzhiyun 54*4882a593Smuzhiyun /* 55*4882a593Smuzhiyun * LANE2: Template tlv struct for accessing 56*4882a593Smuzhiyun * the tlvs in the lec_arp_table->tlvs array 57*4882a593Smuzhiyun */ 58*4882a593Smuzhiyun struct tlv { 59*4882a593Smuzhiyun u32 type; 60*4882a593Smuzhiyun u8 length; 61*4882a593Smuzhiyun u8 value[255]; 62*4882a593Smuzhiyun }; 63*4882a593Smuzhiyun 64*4882a593Smuzhiyun /* Status fields */ 65*4882a593Smuzhiyun #define ESI_UNKNOWN 0 /* 66*4882a593Smuzhiyun * Next packet sent to this mac address 67*4882a593Smuzhiyun * causes ARP-request to be sent 68*4882a593Smuzhiyun */ 69*4882a593Smuzhiyun #define ESI_ARP_PENDING 1 /* 70*4882a593Smuzhiyun * There is no ATM address associated with this 71*4882a593Smuzhiyun * 48-bit address. The LE-ARP protocol is in 72*4882a593Smuzhiyun * progress. 73*4882a593Smuzhiyun */ 74*4882a593Smuzhiyun #define ESI_VC_PENDING 2 /* 75*4882a593Smuzhiyun * There is a valid ATM address associated with 76*4882a593Smuzhiyun * this 48-bit address but there is no VC set 77*4882a593Smuzhiyun * up to that ATM address. The signaling 78*4882a593Smuzhiyun * protocol is in process. 79*4882a593Smuzhiyun */ 80*4882a593Smuzhiyun #define ESI_FLUSH_PENDING 4 /* 81*4882a593Smuzhiyun * The LEC has been notified of the FLUSH_START 82*4882a593Smuzhiyun * status and it is assumed that the flush 83*4882a593Smuzhiyun * protocol is in process. 84*4882a593Smuzhiyun */ 85*4882a593Smuzhiyun #define ESI_FORWARD_DIRECT 5 /* 86*4882a593Smuzhiyun * Either the Path Switching Delay (C22) has 87*4882a593Smuzhiyun * elapsed or the LEC has notified the Mapping 88*4882a593Smuzhiyun * that the flush protocol has completed. In 89*4882a593Smuzhiyun * either case, it is safe to forward packets 90*4882a593Smuzhiyun * to this address via the data direct VC. 91*4882a593Smuzhiyun */ 92*4882a593Smuzhiyun 93*4882a593Smuzhiyun /* Flag values */ 94*4882a593Smuzhiyun #define LEC_REMOTE_FLAG 0x0001 95*4882a593Smuzhiyun #define LEC_PERMANENT_FLAG 0x0002 96*4882a593Smuzhiyun 97*4882a593Smuzhiyun #endif /* _LEC_ARP_H_ */ 98