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