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gerrit-public.fairphone.software / kernel / msm-4.19 / 3d5d5ac085c467f05cce85d32985e78912db4a7e / . / include / net / llc_conn.h
blob: 8ad3bc2c23d78d16880623cb74cdc43f722f1263 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -0700[diff] [blame]1#ifndef LLC_CONN_H
2#define LLC_CONN_H
3/*
4 * Copyright (c) 1997 by Procom Technology, Inc.
5 * 2001, 2002 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#include <linux/timer.h>
15#include <net/llc_if.h>
16#include <net/sock.h>
17#include <linux/llc.h>
18
19#define LLC_EVENT 1
20#define LLC_PACKET 2
21
22#define LLC_P_TIME 2
23#define LLC_ACK_TIME 1
24#define LLC_REJ_TIME 3
25#define LLC_BUSY_TIME 3
26
27struct llc_timer {
28 struct timer_list timer;
29 u16 expire; /* timer expire time */
30};
31
32struct llc_sock {
33 /* struct sock must be the first member of llc_sock */
34 struct sock sk;
35 struct sockaddr_llc addr; /* address sock is bound to */
36 u8 state; /* state of connection */
37 struct llc_sap *sap; /* pointer to parent SAP */
38 struct llc_addr laddr; /* lsap/mac pair */
39 struct llc_addr daddr; /* dsap/mac pair */
40 struct net_device *dev; /* device to send to remote */
41 u8 retry_count; /* number of retries */
42 u8 ack_must_be_send;
43 u8 first_pdu_Ns;
44 u8 npta;
45 struct llc_timer ack_timer;
46 struct llc_timer pf_cycle_timer;
47 struct llc_timer rej_sent_timer;
48 struct llc_timer busy_state_timer; /* ind busy clr at remote LLC */
49 u8 vS; /* seq# next in-seq I-PDU tx'd*/
50 u8 vR; /* seq# next in-seq I-PDU rx'd*/
51 u32 n2; /* max nbr re-tx's for timeout*/
52 u32 n1; /* max nbr octets in I PDU */
53 u8 k; /* tx window size; max = 127 */
54 u8 rw; /* rx window size; max = 127 */
55 u8 p_flag; /* state flags */
56 u8 f_flag;
57 u8 s_flag;
58 u8 data_flag;
59 u8 remote_busy_flag;
60 u8 cause_flag;
61 struct sk_buff_head pdu_unack_q; /* PUDs sent/waiting ack */
62 u16 link; /* network layer link number */
63 u8 X; /* a temporary variable */
64 u8 ack_pf; /* this flag indicates what is
65 the P-bit of acknowledge */
66 u8 failed_data_req; /* recognize that already exist a
67 failed llc_data_req_handler
68 (tx_buffer_full or unacceptable
69 state */
70 u8 dec_step;
71 u8 inc_cntr;
72 u8 dec_cntr;
73 u8 connect_step;
74 u8 last_nr; /* NR of last pdu received */
75 u32 rx_pdu_hdr; /* used for saving header of last pdu
76 received and caused sending FRMR.
77 Used for resending FRMR */
78};
79
80static inline struct llc_sock *llc_sk(const struct sock *sk)
81{
82 return (struct llc_sock *)sk;
83}
84
85static __inline__ void llc_set_backlog_type(struct sk_buff *skb, char type)
86{
87 skb->cb[sizeof(skb->cb) - 1] = type;
88}
89
90static __inline__ char llc_backlog_type(struct sk_buff *skb)
91{
92 return skb->cb[sizeof(skb->cb) - 1];
93}
94
95extern struct sock *llc_sk_alloc(int family, int priority, struct proto *prot);
96extern void llc_sk_free(struct sock *sk);
97
98extern void llc_sk_reset(struct sock *sk);
99
100/* Access to a connection */
101extern int llc_conn_state_process(struct sock *sk, struct sk_buff *skb);
102extern void llc_conn_send_pdu(struct sock *sk, struct sk_buff *skb);
103extern void llc_conn_rtn_pdu(struct sock *sk, struct sk_buff *skb);
104extern void llc_conn_resend_i_pdu_as_cmd(struct sock *sk, u8 nr,
105 u8 first_p_bit);
106extern void llc_conn_resend_i_pdu_as_rsp(struct sock *sk, u8 nr,
107 u8 first_f_bit);
108extern int llc_conn_remove_acked_pdus(struct sock *conn, u8 nr,
109 u16 *how_many_unacked);
110extern struct sock *llc_lookup_established(struct llc_sap *sap,
111 struct llc_addr *daddr,
112 struct llc_addr *laddr);
113extern void llc_sap_add_socket(struct llc_sap *sap, struct sock *sk);
114extern void llc_sap_remove_socket(struct llc_sap *sap, struct sock *sk);
115
116extern u8 llc_data_accept_state(u8 state);
117extern void llc_build_offset_table(void);
118extern int llc_release_sockets(struct llc_sap *sap);
119#endif /* LLC_CONN_H */