120 lines
4.0 KiB
C
120 lines
4.0 KiB
C
|
#ifndef LLC_CONN_H
|
||
|
|
#define LLC_CONN_H
|
||
|
|
/*
|
||
|
|
* Copyright (c) 1997 by Procom Technology, Inc.
|
||
|
|
* 2001, 2002 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.
|
||
|
|
*/
|
||
|
|
#include <linux/timer.h>
|
||
|
|
#include <net/llc_if.h>
|
||
|
|
#include <net/sock.h>
|
||
|
|
#include <linux/llc.h>
|
||
|
|
|
||
|
|
#define LLC_EVENT 1
|
||
|
|
#define LLC_PACKET 2
|
||
|
|
|
||
|
|
#define LLC_P_TIME 2
|
||
|
|
#define LLC_ACK_TIME 1
|
||
|
|
#define LLC_REJ_TIME 3
|
||
|
|
#define LLC_BUSY_TIME 3
|
||
|
|
|
||
|
|
struct llc_timer {
|
||
|
|
struct timer_list timer;
|
||
|
|
u16 expire; /* timer expire time */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct llc_sock {
|
||
|
|
/* struct sock must be the first member of llc_sock */
|
||
|
|
struct sock sk;
|
||
|
|
struct sockaddr_llc addr; /* address sock is bound to */
|
||
|
|
u8 state; /* state of connection */
|
||
|
|
struct llc_sap *sap; /* pointer to parent SAP */
|
||
|
|
struct llc_addr laddr; /* lsap/mac pair */
|
||
|
|
struct llc_addr daddr; /* dsap/mac pair */
|
||
|
|
struct net_device *dev; /* device to send to remote */
|
||
|
|
u8 retry_count; /* number of retries */
|
||
|
|
u8 ack_must_be_send;
|
||
|
|
u8 first_pdu_Ns;
|
||
|
|
u8 npta;
|
||
|
|
struct llc_timer ack_timer;
|
||
|
|
struct llc_timer pf_cycle_timer;
|
||
|
|
struct llc_timer rej_sent_timer;
|
||
|
|
struct llc_timer busy_state_timer; /* ind busy clr at remote LLC */
|
||
|
|
u8 vS; /* seq# next in-seq I-PDU tx'd*/
|
||
|
|
u8 vR; /* seq# next in-seq I-PDU rx'd*/
|
||
|
|
u32 n2; /* max nbr re-tx's for timeout*/
|
||
|
|
u32 n1; /* max nbr octets in I PDU */
|
||
|
|
u8 k; /* tx window size; max = 127 */
|
||
|
|
u8 rw; /* rx window size; max = 127 */
|
||
|
|
u8 p_flag; /* state flags */
|
||
|
|
u8 f_flag;
|
||
|
|
u8 s_flag;
|
||
|
|
u8 data_flag;
|
||
|
|
u8 remote_busy_flag;
|
||
|
|
u8 cause_flag;
|
||
|
|
struct sk_buff_head pdu_unack_q; /* PUDs sent/waiting ack */
|
||
|
|
u16 link; /* network layer link number */
|
||
|
|
u8 X; /* a temporary variable */
|
||
|
|
u8 ack_pf; /* this flag indicates what is
|
||
|
|
the P-bit of acknowledge */
|
||
|
|
u8 failed_data_req; /* recognize that already exist a
|
||
|
|
failed llc_data_req_handler
|
||
|
|
(tx_buffer_full or unacceptable
|
||
|
|
state */
|
||
|
|
u8 dec_step;
|
||
|
|
u8 inc_cntr;
|
||
|
|
u8 dec_cntr;
|
||
|
|
u8 connect_step;
|
||
|
|
u8 last_nr; /* NR of last pdu received */
|
||
|
|
u32 rx_pdu_hdr; /* used for saving header of last pdu
|
||
|
|
received and caused sending FRMR.
|
||
|
|
Used for resending FRMR */
|
||
|
|
};
|
||
|
|
|
||
|
|
static inline struct llc_sock *llc_sk(const struct sock *sk)
|
||
|
|
{
|
||
|
|
return (struct llc_sock *)sk;
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline__ void llc_set_backlog_type(struct sk_buff *skb, char type)
|
||
|
|
{
|
||
|
|
skb->cb[sizeof(skb->cb) - 1] = type;
|
||
|
|
}
|
||
|
|
|
||
|
|
static __inline__ char llc_backlog_type(struct sk_buff *skb)
|
||
|
|
{
|
||
|
|
return skb->cb[sizeof(skb->cb) - 1];
|
||
|
|
}
|
||
|
|
|
||
|
|
extern struct sock *llc_sk_alloc(int family, int priority, struct proto *prot);
|
||
|
|
extern void llc_sk_free(struct sock *sk);
|
||
|
|
|
||
|
|
extern void llc_sk_reset(struct sock *sk);
|
||
|
|
|
||
|
|
/* Access to a connection */
|
||
|
|
extern int llc_conn_state_process(struct sock *sk, struct sk_buff *skb);
|
||
|
|
extern void llc_conn_send_pdu(struct sock *sk, struct sk_buff *skb);
|
||
|
|
extern void llc_conn_rtn_pdu(struct sock *sk, struct sk_buff *skb);
|
||
|
|
extern void llc_conn_resend_i_pdu_as_cmd(struct sock *sk, u8 nr,
|
||
|
|
u8 first_p_bit);
|
||
|
|
extern void llc_conn_resend_i_pdu_as_rsp(struct sock *sk, u8 nr,
|
||
|
|
u8 first_f_bit);
|
||
|
|
extern int llc_conn_remove_acked_pdus(struct sock *conn, u8 nr,
|
||
|
|
u16 *how_many_unacked);
|
||
|
|
extern struct sock *llc_lookup_established(struct llc_sap *sap,
|
||
|
|
struct llc_addr *daddr,
|
||
|
|
struct llc_addr *laddr);
|
||
|
|
extern void llc_sap_add_socket(struct llc_sap *sap, struct sock *sk);
|
||
|
|
extern void llc_sap_remove_socket(struct llc_sap *sap, struct sock *sk);
|
||
|
|
|
||
|
|
extern u8 llc_data_accept_state(u8 state);
|
||
|
|
extern void llc_build_offset_table(void);
|
||
|
|
extern int llc_release_sockets(struct llc_sap *sap);
|
||
|
|
#endif /* LLC_CONN_H */
|