projects / linux.git / blame
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|---|---|---|
| 1da177e4 LT |
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 <[email protected]> | |
| 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 | ||
| 590232a7 ACM |
22 | #define LLC2_P_TIME 2 |
| 23 | #define LLC2_ACK_TIME 1 | |
| 24 | #define LLC2_REJ_TIME 3 | |
| 25 | #define LLC2_BUSY_TIME 3 | |
| 1da177e4 LT |
26 | |
| 27 | struct llc_timer { | |
| 28 | struct timer_list timer; | |
| 590232a7 | 29 | unsigned long expire; /* timer expire time */ |
| 1da177e4 LT |
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 */ | |
| 8420e1b5 | 41 | u32 copied_seq; /* head of yet unread data */ |
| 1da177e4 LT |
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 */ | |
| e5cd6fe3 | 79 | u32 cmsg_flags; |
| 6d2e3ea2 | 80 | struct hlist_node dev_hash_node; |
| 1da177e4 LT |
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 | ||
| 1b8d7ae4 | 98 | extern struct sock *llc_sk_alloc(struct net *net, int family, gfp_t priority, |
| 2928c19e | 99 | struct proto *prot); |
| 1da177e4 LT |
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); | |
| 1da177e4 | 122 | #endif /* LLC_CONN_H */ |