238 lines
9.1 KiB
C
238 lines
9.1 KiB
C
/*
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* Copyright (c) Computing Centre, University of British Columbia, 1985
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* Copyright (C) Computer Science Department IV,
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* University of Erlangen-Nuremberg, Germany, 1990, 1991, 1992
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by the
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* Laboratory for Computation Vision and the Computer Science Department
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* of the the University of British Columbia and the Computer Science
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* Department (IV) of the University of Erlangen-Nuremberg, Germany.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)pk_var.h 8.1 (Berkeley) 6/10/93
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* $Id: pk_var.h,v 1.2 1994/08/02 07:47:48 davidg Exp $
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*/
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#ifndef _NETCCITT_PK_VAR_H_
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#define _NETCCITT_PK_VAR_H_
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/*
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*
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* X.25 Logical Channel Descriptor
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*
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*/
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struct pklcd {
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struct pklcd_q {
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struct pklcd_q *q_forw; /* debugging chain */
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struct pklcd_q *q_back; /* debugging chain */
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} lcd_q;
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int (*lcd_upper)(); /* switch to socket vs datagram vs ...*/
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caddr_t lcd_upnext; /* reference for lcd_upper() */
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int (*lcd_send)(); /* if X.25 front end, direct connect */
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caddr_t lcd_downnext; /* reference for lcd_send() */
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short lcd_lcn; /* Logical channel number */
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short lcd_state; /* Logical Channel state */
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short lcd_timer; /* Various timer values */
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short lcd_dg_timer; /* to reclaim idle datagram circuits */
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bool lcd_intrconf_pending; /* Interrupt confirmation pending */
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octet lcd_intrdata; /* Octet of incoming intr data */
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char lcd_retry; /* Timer retry count */
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char lcd_rsn; /* Seq no of last received packet */
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char lcd_ssn; /* Seq no of next packet to send */
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char lcd_output_window; /* Output flow control window */
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char lcd_input_window; /* Input flow control window */
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char lcd_last_transmitted_pr;/* Last Pr value transmitted */
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bool lcd_rnr_condition; /* Remote in busy condition */
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bool lcd_window_condition; /* Output window size exceeded */
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bool lcd_reset_condition; /* True, if waiting reset confirm */
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bool lcd_rxrnr_condition; /* True, if we have sent rnr */
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char lcd_packetsize; /* Maximum packet size */
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char lcd_windowsize; /* Window size - both directions */
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octet lcd_closed_user_group; /* Closed user group specification */
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char lcd_flags; /* copy of sockaddr_x25 op_flags */
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struct mbuf *lcd_facilities; /* user supplied facilities for cr */
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struct mbuf *lcd_template; /* Address of response packet */
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struct socket *lcd_so; /* Socket addr for connection */
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struct sockaddr_x25 *lcd_craddr;/* Calling address pointer */
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struct sockaddr_x25 *lcd_ceaddr;/* Called address pointer */
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time_t lcd_stime; /* time circuit established */
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long lcd_txcnt; /* Data packet transmit count */
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long lcd_rxcnt; /* Data packet receive count */
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short lcd_intrcnt; /* Interrupt packet transmit count */
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struct pklcd *lcd_listen; /* Next lcd on listen queue */
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struct pkcb *lcd_pkp; /* Network this lcd is attached to */
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struct mbuf *lcd_cps; /* Complete Packet Sequence reassembly*/
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long lcd_cpsmax; /* Max length for CPS */
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struct sockaddr_x25 lcd_faddr; /* Remote Address (Calling) */
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struct sockaddr_x25 lcd_laddr; /* Local Address (Called) */
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struct sockbuf lcd_sb; /* alternate for datagram service */
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};
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/*
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* Per network information, allocated dynamically
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* when a new network is configured.
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*/
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struct pkcb {
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struct pkcb_q {
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struct pkcb_q *q_forw;
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struct pkcb_q *q_backw;
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} pk_q;
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short pk_state; /* packet level status */
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short pk_maxlcn; /* local copy of xc_maxlcn */
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int (*pk_lloutput) (); /* link level output procedure */
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caddr_t (*pk_llctlinput) (); /* link level ctloutput procedure */
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caddr_t pk_llnext; /* handle for next level down */
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struct x25config *pk_xcp; /* network specific configuration */
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struct x25_ifaddr *pk_ia; /* backpointer to ifaddr */
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struct pklcd **pk_chan; /* actual size == xc_maxlcn+1 */
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short pk_dxerole; /* DXE role of PLE over LLC2 */
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short pk_restartcolls; /* counting RESTART collisions til resolved */
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struct rtentry *pk_rt; /* back pointer to route */
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struct rtentry *pk_llrt; /* pointer to reverse mapping */
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u_short pk_refcount; /* ref count */
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};
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#define FOR_ALL_PKCBS(p) for((p) = (struct pkcb *)(pkcb_q.q_forw); \
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(pkcb_q.q_forw != &pkcb_q) && ((struct pkcb_q *)(p) != &pkcb_q); \
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(p) = (struct pkcb *)((p) -> pk_q.q_forw))
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#define PQEMPTY (pkcb_q.q_forw == &pkcb_q)
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/*
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* Interface address, x25 version. Exactly one of these structures is
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* allocated for each interface with an x25 address.
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*
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* The ifaddr structure conatins the protocol-independent part
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* of the structure, and is assumed to be first.
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*/
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struct x25_ifaddr {
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struct ifaddr ia_ifa; /* protocol-independent info */
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#define ia_ifp ia_ifa.ifa_ifp
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#define ia_flags ia_ifa.ifa_flags
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struct x25config ia_xc; /* network specific configuration */
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struct pkcb *ia_pkcb;
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#define ia_maxlcn ia_xc.xc_maxlcn
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int (*ia_start) (); /* connect, confirm method */
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struct sockaddr_x25 ia_dstaddr; /* reserve space for route dst */
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};
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/*
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* ``Link-Level'' extension to Routing Entry for upper level
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* packet switching via X.25 virtual circuits.
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*/
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struct llinfo_x25 {
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struct llinfo_x25 *lx_next; /* chain together in linked list */
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struct llinfo_x25 *lx_prev; /* chain together in linked list */
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struct rtentry *lx_rt; /* back pointer to route */
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struct pklcd *lx_lcd; /* local connection block */
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struct x25_ifaddr *lx_ia; /* may not be same as rt_ifa */
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int lx_state; /* can't trust lcd->lcd_state */
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int lx_flags;
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int lx_timer; /* for idle timeout */
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int lx_family; /* for dispatch */
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};
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/* States for lx_state */
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#define LXS_NEWBORN 0
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#define LXS_RESOLVING 1
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#define LXS_FREE 2
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#define LXS_CONNECTING 3
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#define LXS_CONNECTED 4
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#define LXS_DISCONNECTING 5
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#define LXS_LISTENING 6
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/* flags */
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#define LXF_VALID 0x1 /* Circuit is live, etc. */
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#define LXF_RTHELD 0x2 /* this lcb references rtentry */
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#define LXF_LISTEN 0x4 /* accepting incoming calls */
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/*
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* Definitions for accessing bitfields/bitslices inside X.25 structs
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*/
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struct x25bitslice {
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unsigned int bs_mask;
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unsigned int bs_shift;
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};
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#define calling_addrlen 0
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#define called_addrlen 1
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#define q_bit 2
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#define d_bit 3
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#define fmt_identifier 4
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#define lc_group_number 1
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#define p_r 5
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#define m_bit 6
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#define p_s 7
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#define zilch 8
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#define X25GBITS(Arg, Index) (((Arg) & x25_bitslice[(Index)].bs_mask) >> x25_bitslice[(Index)].bs_shift)
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#define X25SBITS(Arg, Index, Val) (Arg) |= (((Val) << x25_bitslice[(Index)].bs_shift) & x25_bitslice[(Index)].bs_mask)
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#define X25CSBITS(Arg, Index, Val) (Arg) = (((Val) << x25_bitslice[(Index)].bs_shift) & x25_bitslice[(Index)].bs_mask)
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extern struct x25bitslice x25_bitslice[];
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#define ISOFIFTTYPE(i,t) ((i)->if_type == (t))
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#define ISISO8802(i) ((ISOFIFTTYPE(i, IFT_ETHER) || \
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ISOFIFTTYPE(i, IFT_ISO88023) || \
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ISOFIFTTYPE(i, IFT_ISO88024) || \
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ISOFIFTTYPE(i, IFT_ISO88025) || \
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ISOFIFTTYPE(i, IFT_ISO88026) || \
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ISOFIFTTYPE(i, IFT_P10) || \
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ISOFIFTTYPE(i, IFT_P80) || \
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ISOFIFTTYPE(i, IFT_FDDI)))
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/*
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* miscellenous debugging info
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*/
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struct mbuf_cache {
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int mbc_size;
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int mbc_num;
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int mbc_oldsize;
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struct mbuf **mbc_cache;
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};
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#if defined(KERNEL) && defined(CCITT)
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extern struct pkcb_q pkcb_q;
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struct pklcd *pk_listenhead;
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struct pklcd *pk_attach();
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extern char *pk_name[], *pk_state[];
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int pk_t20, pk_t21, pk_t22, pk_t23;
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#endif
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#endif
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