| Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 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 */ |