1 /* 2 * Lan Emulation client header file 3 * 4 * Marko Kiiskila <mkiiskila@yahoo.com> 5 */ 6 7 #ifndef _LEC_H_ 8 #define _LEC_H_ 9 10 #include <linux/config.h> 11 #include <linux/atmdev.h> 12 #include <linux/netdevice.h> 13 #include <linux/atmlec.h> 14 15 #define LEC_HEADER_LEN 16 16 17 struct lecdatahdr_8023 { 18 unsigned short le_header; 19 unsigned char h_dest[ETH_ALEN]; 20 unsigned char h_source[ETH_ALEN]; 21 unsigned short h_type; 22 }; 23 24 struct lecdatahdr_8025 { 25 unsigned short le_header; 26 unsigned char ac_pad; 27 unsigned char fc; 28 unsigned char h_dest[ETH_ALEN]; 29 unsigned char h_source[ETH_ALEN]; 30 }; 31 32 #define LEC_MINIMUM_8023_SIZE 62 33 #define LEC_MINIMUM_8025_SIZE 16 34 35 /* 36 * Operations that LANE2 capable device can do. Two first functions 37 * are used to make the device do things. See spec 3.1.3 and 3.1.4. 38 * 39 * The third function is intented for the MPOA component sitting on 40 * top of the LANE device. The MPOA component assigns it's own function 41 * to (*associate_indicator)() and the LANE device will use that 42 * function to tell about TLVs it sees floating through. 43 * 44 */ 45 struct lane2_ops { 46 int (*resolve) (struct net_device *dev, u8 *dst_mac, int force, 47 u8 **tlvs, u32 *sizeoftlvs); 48 int (*associate_req) (struct net_device *dev, u8 *lan_dst, 49 u8 *tlvs, u32 sizeoftlvs); 50 void (*associate_indicator) (struct net_device *dev, u8 *mac_addr, 51 u8 *tlvs, u32 sizeoftlvs); 52 }; 53 54 /* 55 * ATM LAN Emulation supports both LLC & Dix Ethernet EtherType 56 * frames. 57 * 58 * 1. Dix Ethernet EtherType frames encoded by placing EtherType 59 * field in h_type field. Data follows immediatelly after header. 60 * 2. LLC Data frames whose total length, including LLC field and data, 61 * but not padding required to meet the minimum data frame length, 62 * is less than 1536(0x0600) MUST be encoded by placing that length 63 * in the h_type field. The LLC field follows header immediatelly. 64 * 3. LLC data frames longer than this maximum MUST be encoded by placing 65 * the value 0 in the h_type field. 66 * 67 */ 68 69 /* Hash table size */ 70 #define LEC_ARP_TABLE_SIZE 16 71 72 struct lec_priv { 73 struct net_device_stats stats; 74 unsigned short lecid; /* Lecid of this client */ 75 struct hlist_head lec_arp_empty_ones; 76 /* Used for storing VCC's that don't have a MAC address attached yet */ 77 struct hlist_head lec_arp_tables[LEC_ARP_TABLE_SIZE]; 78 /* Actual LE ARP table */ 79 struct hlist_head lec_no_forward; 80 /* 81 * Used for storing VCC's (and forward packets from) which are to 82 * age out by not using them to forward packets. 83 * This is because to some LE clients there will be 2 VCCs. Only 84 * one of them gets used. 85 */ 86 struct hlist_head mcast_fwds; 87 /* 88 * With LANEv2 it is possible that BUS (or a special multicast server) 89 * establishes multiple Multicast Forward VCCs to us. This list 90 * collects all those VCCs. LANEv1 client has only one item in this 91 * list. These entries are not aged out. 92 */ 93 spinlock_t lec_arp_lock; 94 struct atm_vcc *mcast_vcc; /* Default Multicast Send VCC */ 95 struct atm_vcc *lecd; 96 struct work_struct lec_arp_work; /* C10 */ 97 unsigned int maximum_unknown_frame_count; 98 /* 99 * Within the period of time defined by this variable, the client will send 100 * no more than C10 frames to BUS for a given unicast destination. (C11) 101 */ 102 unsigned long max_unknown_frame_time; 103 /* 104 * If no traffic has been sent in this vcc for this period of time, 105 * vcc will be torn down (C12) 106 */ 107 unsigned long vcc_timeout_period; 108 /* 109 * An LE Client MUST not retry an LE_ARP_REQUEST for a 110 * given frame's LAN Destination more than maximum retry count times, 111 * after the first LEC_ARP_REQUEST (C13) 112 */ 113 unsigned short max_retry_count; 114 /* 115 * Max time the client will maintain an entry in its arp cache in 116 * absence of a verification of that relationship (C17) 117 */ 118 unsigned long aging_time; 119 /* 120 * Max time the client will maintain an entry in cache when 121 * topology change flag is true (C18) 122 */ 123 unsigned long forward_delay_time; /* Topology change flag (C19) */ 124 int topology_change; 125 /* 126 * Max time the client expects an LE_ARP_REQUEST/LE_ARP_RESPONSE 127 * cycle to take (C20) 128 */ 129 unsigned long arp_response_time; 130 /* 131 * Time limit ot wait to receive an LE_FLUSH_RESPONSE after the 132 * LE_FLUSH_REQUEST has been sent before taking recover action. (C21) 133 */ 134 unsigned long flush_timeout; 135 /* The time since sending a frame to the bus after which the 136 * LE Client may assume that the frame has been either discarded or 137 * delivered to the recipient (C22) 138 */ 139 unsigned long path_switching_delay; 140 141 u8 *tlvs; /* LANE2: TLVs are new */ 142 u32 sizeoftlvs; /* The size of the tlv array in bytes */ 143 int lane_version; /* LANE2 */ 144 int itfnum; /* e.g. 2 for lec2, 5 for lec5 */ 145 struct lane2_ops *lane2_ops; /* can be NULL for LANE v1 */ 146 int is_proxy; /* bridge between ATM and Ethernet */ 147 int is_trdev; /* Device type, 0 = Ethernet, 1 = TokenRing */ 148 }; 149 150 struct lec_vcc_priv { 151 void (*old_pop) (struct atm_vcc *vcc, struct sk_buff *skb); 152 int xoff; 153 }; 154 155 #define LEC_VCC_PRIV(vcc) ((struct lec_vcc_priv *)((vcc)->user_back)) 156 157 #endif /* _LEC_H_ */ 158