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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 | #ifndef LLC_IF_H
#define LLC_IF_H
/*
* Copyright (c) 1997 by Procom Technology,Inc.
* 2001 by Arnaldo Carvalho de Melo <acme@conectiva.com.br>
*
* This program can be redistributed or modified under the terms of the
* GNU General Public License as published by the Free Software Foundation.
* This program is distributed without any warranty or implied warranty
* of merchantability or fitness for a particular purpose.
*
* See the GNU General Public License for more details.
*/
/* Defines LLC interface to network layer */
/* Available primitives */
#include <linux/if.h>
#define LLC_DATAUNIT_PRIM 0
#define LLC_CONN_PRIM 1
#define LLC_DATA_PRIM 2
#define LLC_DISC_PRIM 3
#define LLC_RESET_PRIM 4
#define LLC_FLOWCONTROL_PRIM 5
#define LLC_DISABLE_PRIM 6
#define LLC_XID_PRIM 7
#define LLC_TEST_PRIM 8
#define LLC_SAP_ACTIVATION 9
#define LLC_SAP_DEACTIVATION 10
#define LLC_NBR_PRIMITIVES 11
#define LLC_IND 1
#define LLC_CONFIRM 2
/* Primitive type */
#define LLC_PRIM_TYPE_REQ 1
#define LLC_PRIM_TYPE_IND 2
#define LLC_PRIM_TYPE_RESP 3
#define LLC_PRIM_TYPE_CONFIRM 4
/* Reset reasons, remote entity or local LLC */
#define LLC_RESET_REASON_REMOTE 1
#define LLC_RESET_REASON_LOCAL 2
/* Disconnect reasons */
#define LLC_DISC_REASON_RX_DM_RSP_PDU 0
#define LLC_DISC_REASON_RX_DISC_CMD_PDU 1
#define LLC_DISC_REASON_ACK_TMR_EXP 2
/* Confirm reasons */
#define LLC_STATUS_CONN 0 /* connect confirm & reset confirm */
#define LLC_STATUS_DISC 1 /* connect confirm & reset confirm */
#define LLC_STATUS_FAILED 2 /* connect confirm & reset confirm */
#define LLC_STATUS_IMPOSSIBLE 3 /* connect confirm */
#define LLC_STATUS_RECEIVED 4 /* data conn */
#define LLC_STATUS_REMOTE_BUSY 5 /* data conn */
#define LLC_STATUS_REFUSE 6 /* data conn */
#define LLC_STATUS_CONFLICT 7 /* disconnect conn */
#define LLC_STATUS_RESET_DONE 8 /* */
/* Structures and types */
/* SAP/MAC Address pair */
struct llc_addr {
u8 lsap;
u8 mac[IFHWADDRLEN];
};
/* Primitive-specific data */
struct llc_prim_conn {
struct llc_addr saddr; /* used by request only */
struct llc_addr daddr; /* used by request only */
u8 status; /* reason for failure */
u8 pri; /* service_class */
struct net_device *dev;
struct sock *sk; /* returned from REQUEST */
void *handler; /* upper layer use,
stored in llc_opt->handler */
u16 link;
struct sk_buff *skb; /* received SABME */
};
struct llc_prim_disc {
struct sock *sk;
u16 link;
u8 reason; /* not used by request */
};
struct llc_prim_reset {
struct sock *sk;
u16 link;
u8 reason; /* used only by indicate */
};
struct llc_prim_flow_ctrl {
struct sock *sk;
u16 link;
u32 amount;
};
struct llc_prim_data {
struct sock *sk;
u16 link;
u8 pri;
struct sk_buff *skb; /* pointer to frame */
u8 status; /* reason */
};
/* Sending data in conection-less mode */
struct llc_prim_unit_data {
struct llc_addr saddr;
struct llc_addr daddr;
u8 pri;
struct sk_buff *skb; /* pointer to frame */
u8 lfb; /* largest frame bit (TR) */
};
struct llc_prim_xid {
struct llc_addr saddr;
struct llc_addr daddr;
u8 pri;
struct sk_buff *skb;
};
struct llc_prim_test {
struct llc_addr saddr;
struct llc_addr daddr;
u8 pri;
struct sk_buff *skb; /* pointer to frame */
};
union llc_u_prim_data {
struct llc_prim_conn conn;
struct llc_prim_disc disc;
struct llc_prim_reset res;
struct llc_prim_flow_ctrl fc;
struct llc_prim_data data; /* data */
struct llc_prim_unit_data udata; /* unit data */
struct llc_prim_xid xid;
struct llc_prim_test test;
};
struct llc_sap;
/* Information block passed with all called primitives */
struct llc_prim_if_block {
struct llc_sap *sap;
u8 prim;
union llc_u_prim_data *data;
};
typedef int (*llc_prim_call_t)(struct llc_prim_if_block *prim_if);
extern struct llc_sap *llc_sap_open(llc_prim_call_t network_indicate,
llc_prim_call_t network_confirm, u8 lsap);
extern void llc_sap_close(struct llc_sap *sap);
#endif /* LLC_IF_H */
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