1 #ifndef LLC_H 2 #define LLC_H 3 /* 4 * Copyright (c) 1997 by Procom Technology, Inc. 5 * 2001-2003 by Arnaldo Carvalho de Melo <acme@conectiva.com.br> 6 * 7 * This program can be redistributed or modified under the terms of the 8 * GNU General Public License as published by the Free Software Foundation. 9 * This program is distributed without any warranty or implied warranty 10 * of merchantability or fitness for a particular purpose. 11 * 12 * See the GNU General Public License for more details. 13 */ 14 15 #include <linux/if.h> 16 #include <linux/if_ether.h> 17 #include <linux/list.h> 18 #include <linux/spinlock.h> 19 20 struct net_device; 21 struct packet_type; 22 struct sk_buff; 23 24 struct llc_addr { 25 unsigned char lsap; 26 unsigned char mac[IFHWADDRLEN]; 27 }; 28 29 #define LLC_SAP_STATE_INACTIVE 1 30 #define LLC_SAP_STATE_ACTIVE 2 31 32 /** 33 * struct llc_sap - Defines the SAP component 34 * 35 * @station - station this sap belongs to 36 * @state - sap state 37 * @p_bit - only lowest-order bit used 38 * @f_bit - only lowest-order bit used 39 * @laddr - SAP value in this 'lsap' 40 * @node - entry in station sap_list 41 * @sk_list - LLC sockets this one manages 42 */ 43 struct llc_sap { 44 unsigned char state; 45 unsigned char p_bit; 46 unsigned char f_bit; 47 int (*rcv_func)(struct sk_buff *skb, 48 struct net_device *dev, 49 struct packet_type *pt); 50 struct llc_addr laddr; 51 struct list_head node; 52 struct { 53 rwlock_t lock; 54 struct hlist_head list; 55 } sk_list; 56 }; 57 58 #define LLC_DEST_INVALID 0 /* Invalid LLC PDU type */ 59 #define LLC_DEST_SAP 1 /* Type 1 goes here */ 60 #define LLC_DEST_CONN 2 /* Type 2 goes here */ 61 62 extern struct list_head llc_sap_list; 63 extern rwlock_t llc_sap_list_lock; 64 extern unsigned char llc_station_mac_sa[ETH_ALEN]; 65 66 extern int llc_rcv(struct sk_buff *skb, struct net_device *dev, 67 struct packet_type *pt); 68 69 extern int llc_mac_hdr_init(struct sk_buff *skb, 70 unsigned char *sa, unsigned char *da); 71 72 extern void llc_add_pack(int type, void (*handler)(struct llc_sap *sap, 73 struct sk_buff *skb)); 74 extern void llc_remove_pack(int type); 75 76 extern void llc_set_station_handler(void (*handler)(struct sk_buff *skb)); 77 78 extern struct llc_sap *llc_sap_open(unsigned char lsap, 79 int (*rcv)(struct sk_buff *skb, 80 struct net_device *dev, 81 struct packet_type *pt)); 82 extern void llc_sap_close(struct llc_sap *sap); 83 84 extern struct llc_sap *llc_sap_find(unsigned char sap_value); 85 86 extern int llc_build_and_send_ui_pkt(struct llc_sap *sap, struct sk_buff *skb, 87 unsigned char *dmac, unsigned char dsap); 88 89 extern int llc_station_init(void); 90 extern void llc_station_exit(void); 91 92 #ifdef CONFIG_PROC_FS 93 extern int llc_proc_init(void); 94 extern void llc_proc_exit(void); 95 #else 96 #define llc_proc_init() (0) 97 #define llc_proc_exit() do { } while(0) 98 #endif /* CONFIG_PROC_FS */ 99 #endif /* LLC_H */ 100