irq_domain: Move irq_virq_count into NOMAP revmap
[linux-2.6.git] / include / net / llc_conn.h
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 LLC2_P_TIME               2
23 #define LLC2_ACK_TIME             1
24 #define LLC2_REJ_TIME             3
25 #define LLC2_BUSY_TIME            3
26
27 struct llc_timer {
28         struct timer_list timer;
29         unsigned long     expire;       /* timer expire time */
30 };
31
32 struct 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         u32                 copied_seq;         /* head of yet unread data */
42         u8                  retry_count;        /* number of retries */
43         u8                  ack_must_be_send;
44         u8                  first_pdu_Ns;
45         u8                  npta;
46         struct llc_timer    ack_timer;
47         struct llc_timer    pf_cycle_timer;
48         struct llc_timer    rej_sent_timer;
49         struct llc_timer    busy_state_timer;   /* ind busy clr at remote LLC */
50         u8                  vS;                 /* seq# next in-seq I-PDU tx'd*/
51         u8                  vR;                 /* seq# next in-seq I-PDU rx'd*/
52         u32                 n2;                 /* max nbr re-tx's for timeout*/
53         u32                 n1;                 /* max nbr octets in I PDU */
54         u8                  k;                  /* tx window size; max = 127 */
55         u8                  rw;                 /* rx window size; max = 127 */
56         u8                  p_flag;             /* state flags */
57         u8                  f_flag;
58         u8                  s_flag;
59         u8                  data_flag;
60         u8                  remote_busy_flag;
61         u8                  cause_flag;
62         struct sk_buff_head pdu_unack_q;        /* PUDs sent/waiting ack */
63         u16                 link;               /* network layer link number */
64         u8                  X;                  /* a temporary variable */
65         u8                  ack_pf;             /* this flag indicates what is
66                                                    the P-bit of acknowledge */
67         u8                  failed_data_req; /* recognize that already exist a
68                                                 failed llc_data_req_handler
69                                                 (tx_buffer_full or unacceptable
70                                                 state */
71         u8                  dec_step;
72         u8                  inc_cntr;
73         u8                  dec_cntr;
74         u8                  connect_step;
75         u8                  last_nr;       /* NR of last pdu received */
76         u32                 rx_pdu_hdr;    /* used for saving header of last pdu
77                                               received and caused sending FRMR.
78                                               Used for resending FRMR */
79         u32                 cmsg_flags;
80         struct hlist_node   dev_hash_node;
81 };
82
83 static inline struct llc_sock *llc_sk(const struct sock *sk)
84 {
85         return (struct llc_sock *)sk;
86 }
87
88 static __inline__ void llc_set_backlog_type(struct sk_buff *skb, char type)
89 {
90         skb->cb[sizeof(skb->cb) - 1] = type;
91 }
92
93 static __inline__ char llc_backlog_type(struct sk_buff *skb)
94 {
95         return skb->cb[sizeof(skb->cb) - 1];
96 }
97
98 extern struct sock *llc_sk_alloc(struct net *net, int family, gfp_t priority,
99                                  struct proto *prot);
100 extern void llc_sk_free(struct sock *sk);
101
102 extern void llc_sk_reset(struct sock *sk);
103
104 /* Access to a connection */
105 extern int llc_conn_state_process(struct sock *sk, struct sk_buff *skb);
106 extern void llc_conn_send_pdu(struct sock *sk, struct sk_buff *skb);
107 extern void llc_conn_rtn_pdu(struct sock *sk, struct sk_buff *skb);
108 extern void llc_conn_resend_i_pdu_as_cmd(struct sock *sk, u8 nr,
109                                          u8 first_p_bit);
110 extern void llc_conn_resend_i_pdu_as_rsp(struct sock *sk, u8 nr,
111                                          u8 first_f_bit);
112 extern int llc_conn_remove_acked_pdus(struct sock *conn, u8 nr,
113                                       u16 *how_many_unacked);
114 extern struct sock *llc_lookup_established(struct llc_sap *sap,
115                                            struct llc_addr *daddr,
116                                            struct llc_addr *laddr);
117 extern void llc_sap_add_socket(struct llc_sap *sap, struct sock *sk);
118 extern void llc_sap_remove_socket(struct llc_sap *sap, struct sock *sk);
119
120 extern u8 llc_data_accept_state(u8 state);
121 extern void llc_build_offset_table(void);
122 #endif /* LLC_CONN_H */