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