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119 lines
4.1 KiB
119 lines
4.1 KiB
#ifndef LLC_CONN_H |
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#define LLC_CONN_H |
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/* |
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* Copyright (c) 1997 by Procom Technology, Inc. |
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* 2001, 2002 by Arnaldo Carvalho de Melo <[email protected]> |
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* |
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* This program can be redistributed or modified under the terms of the |
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* GNU General Public License as published by the Free Software Foundation. |
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* This program is distributed without any warranty or implied warranty |
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* of merchantability or fitness for a particular purpose. |
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* |
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* See the GNU General Public License for more details. |
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*/ |
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#include <linux/timer.h> |
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#include <net/llc_if.h> |
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#include <net/sock.h> |
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#include <linux/llc.h> |
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#define LLC_EVENT 1 |
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#define LLC_PACKET 2 |
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#define LLC2_P_TIME 2 |
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#define LLC2_ACK_TIME 1 |
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#define LLC2_REJ_TIME 3 |
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#define LLC2_BUSY_TIME 3 |
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struct llc_timer { |
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struct timer_list timer; |
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unsigned long expire; /* timer expire time */ |
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}; |
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struct llc_sock { |
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/* struct sock must be the first member of llc_sock */ |
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struct sock sk; |
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struct sockaddr_llc addr; /* address sock is bound to */ |
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u8 state; /* state of connection */ |
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struct llc_sap *sap; /* pointer to parent SAP */ |
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struct llc_addr laddr; /* lsap/mac pair */ |
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struct llc_addr daddr; /* dsap/mac pair */ |
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struct net_device *dev; /* device to send to remote */ |
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u32 copied_seq; /* head of yet unread data */ |
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u8 retry_count; /* number of retries */ |
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u8 ack_must_be_send; |
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u8 first_pdu_Ns; |
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u8 npta; |
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struct llc_timer ack_timer; |
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struct llc_timer pf_cycle_timer; |
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struct llc_timer rej_sent_timer; |
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struct llc_timer busy_state_timer; /* ind busy clr at remote LLC */ |
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u8 vS; /* seq# next in-seq I-PDU tx'd*/ |
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u8 vR; /* seq# next in-seq I-PDU rx'd*/ |
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u32 n2; /* max nbr re-tx's for timeout*/ |
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u32 n1; /* max nbr octets in I PDU */ |
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u8 k; /* tx window size; max = 127 */ |
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u8 rw; /* rx window size; max = 127 */ |
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u8 p_flag; /* state flags */ |
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u8 f_flag; |
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u8 s_flag; |
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u8 data_flag; |
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u8 remote_busy_flag; |
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u8 cause_flag; |
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struct sk_buff_head pdu_unack_q; /* PUDs sent/waiting ack */ |
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u16 link; /* network layer link number */ |
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u8 X; /* a temporary variable */ |
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u8 ack_pf; /* this flag indicates what is |
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the P-bit of acknowledge */ |
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u8 failed_data_req; /* recognize that already exist a |
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failed llc_data_req_handler |
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(tx_buffer_full or unacceptable |
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state */ |
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u8 dec_step; |
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u8 inc_cntr; |
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u8 dec_cntr; |
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u8 connect_step; |
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u8 last_nr; /* NR of last pdu received */ |
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u32 rx_pdu_hdr; /* used for saving header of last pdu |
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received and caused sending FRMR. |
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Used for resending FRMR */ |
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u32 cmsg_flags; |
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struct hlist_node dev_hash_node; |
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}; |
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static inline struct llc_sock *llc_sk(const struct sock *sk) |
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{ |
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return (struct llc_sock *)sk; |
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} |
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static __inline__ void llc_set_backlog_type(struct sk_buff *skb, char type) |
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{ |
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skb->cb[sizeof(skb->cb) - 1] = type; |
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} |
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static __inline__ char llc_backlog_type(struct sk_buff *skb) |
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{ |
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return skb->cb[sizeof(skb->cb) - 1]; |
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} |
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struct sock *llc_sk_alloc(struct net *net, int family, gfp_t priority, |
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struct proto *prot, int kern); |
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void llc_sk_stop_all_timers(struct sock *sk, bool sync); |
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void llc_sk_free(struct sock *sk); |
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void llc_sk_reset(struct sock *sk); |
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/* Access to a connection */ |
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int llc_conn_state_process(struct sock *sk, struct sk_buff *skb); |
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void llc_conn_send_pdu(struct sock *sk, struct sk_buff *skb); |
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void llc_conn_rtn_pdu(struct sock *sk, struct sk_buff *skb); |
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void llc_conn_resend_i_pdu_as_cmd(struct sock *sk, u8 nr, u8 first_p_bit); |
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void llc_conn_resend_i_pdu_as_rsp(struct sock *sk, u8 nr, u8 first_f_bit); |
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int llc_conn_remove_acked_pdus(struct sock *conn, u8 nr, u16 *how_many_unacked); |
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struct sock *llc_lookup_established(struct llc_sap *sap, struct llc_addr *daddr, |
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struct llc_addr *laddr); |
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void llc_sap_add_socket(struct llc_sap *sap, struct sock *sk); |
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void llc_sap_remove_socket(struct llc_sap *sap, struct sock *sk); |
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u8 llc_data_accept_state(u8 state); |
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void llc_build_offset_table(void); |
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#endif /* LLC_CONN_H */
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