1 /* 2 * Copyright (c) University of British Columbia, 1984 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * the Laboratory for Computation Vision and the Computer Science Department 8 * of the University of British Columbia. 9 * 10 * %sccs.include.redist.c% 11 * 12 * @(#)pk_var.h 7.11 (Berkeley) 05/29/91 13 */ 14 15 16 /* 17 * 18 * X.25 Logical Channel Descriptor 19 * 20 */ 21 22 struct pklcd { 23 struct pklcd_q { 24 struct pklcd_q *q_forw; /* debugging chain */ 25 struct pklcd_q *q_back; /* debugging chain */ 26 } lcd_q; 27 int (*lcd_upper)(); /* switch to socket vs datagram vs ...*/ 28 caddr_t lcd_upnext; /* reference for lcd_upper() */ 29 int (*lcd_send)(); /* if X.25 front end, direct connect */ 30 caddr_t lcd_downnext; /* reference for lcd_send() */ 31 short lcd_lcn; /* Logical channel number */ 32 short lcd_state; /* Logical Channel state */ 33 short lcd_timer; /* Various timer values */ 34 short lcd_dg_timer; /* to reclaim idle datagram circuits */ 35 bool lcd_intrconf_pending; /* Interrupt confirmation pending */ 36 octet lcd_intrdata; /* Octet of incoming intr data */ 37 char lcd_retry; /* Timer retry count */ 38 char lcd_rsn; /* Seq no of last received packet */ 39 char lcd_ssn; /* Seq no of next packet to send */ 40 char lcd_output_window; /* Output flow control window */ 41 char lcd_input_window; /* Input flow control window */ 42 char lcd_last_transmitted_pr;/* Last Pr value transmitted */ 43 bool lcd_rnr_condition; /* Remote in busy condition */ 44 bool lcd_window_condition; /* Output window size exceeded */ 45 bool lcd_reset_condition; /* True, if waiting reset confirm */ 46 bool lcd_rxrnr_condition; /* True, if we have sent rnr */ 47 char lcd_packetsize; /* Maximum packet size */ 48 char lcd_windowsize; /* Window size - both directions */ 49 octet lcd_closed_user_group; /* Closed user group specification */ 50 char lcd_flags; /* copy of sockaddr_x25 op_flags */ 51 struct mbuf *lcd_facilities; /* user supplied facilities for cr */ 52 struct mbuf *lcd_template; /* Address of response packet */ 53 struct socket *lcd_so; /* Socket addr for connection */ 54 struct sockaddr_x25 *lcd_craddr;/* Calling address pointer */ 55 struct sockaddr_x25 *lcd_ceaddr;/* Called address pointer */ 56 time_t lcd_stime; /* time circuit established */ 57 long lcd_txcnt; /* Data packet transmit count */ 58 long lcd_rxcnt; /* Data packet receive count */ 59 short lcd_intrcnt; /* Interrupt packet transmit count */ 60 struct pklcd *lcd_listen; /* Next lcd on listen queue */ 61 struct pkcb *lcd_pkp; /* Network this lcd is attached to */ 62 struct mbuf *lcd_cps; /* Complete Packet Sequence reassembly*/ 63 long lcd_cpsmax; /* Max length for CPS */ 64 struct sockaddr_x25 lcd_faddr; /* Remote Address (Calling) */ 65 struct sockaddr_x25 lcd_laddr; /* Local Address (Called) */ 66 struct sockbuf lcd_sb; /* alternate for datagram service */ 67 }; 68 69 /* 70 * Per network information, allocated dynamically 71 * when a new network is configured. 72 */ 73 74 struct pkcb { 75 struct pkcb *pk_next; 76 short pk_state; /* packet level status */ 77 short pk_maxlcn; /* local copy of xc_maxlcn */ 78 int (*pk_lloutput) (); /* link level output procedure */ 79 caddr_t pk_llnext; /* handle for next level down */ 80 struct x25config *pk_xcp; /* network specific configuration */ 81 struct x25_ifaddr *pk_ia; /* backpointer to ifaddr */ 82 struct pklcd **pk_chan; /* actual size == xc_maxlcn+1 */ 83 }; 84 /* 85 * Interface address, x25 version. Exactly one of these structures is 86 * allocated for each interface with an x25 address. 87 * 88 * The ifaddr structure conatins the protocol-independent part 89 * of the structure, and is assumed to be first. 90 */ 91 struct x25_ifaddr { 92 struct ifaddr ia_ifa; /* protocol-independent info */ 93 #define ia_ifp ia_ifa.ifa_ifp 94 #define ia_flags ia_ifa.ifa_flags 95 struct x25config ia_xc; /* network specific configuration */ 96 #define ia_maxlcn ia_xc.xc_maxlcn 97 int (*ia_start) (); /* connect, confirm method */ 98 struct sockaddr_x25 ia_dstaddr; /* reserve space for route dst */ 99 }; 100 101 /* 102 * ``Link-Level'' extension to Routing Entry for upper level 103 * packet switching via X.25 virtual circuits. 104 */ 105 struct llinfo_x25 { 106 struct llinfo_x25 *lx_next; /* chain together in linked list */ 107 struct llinfo_x25 *lx_prev; /* chain together in linked list */ 108 struct rtentry *lx_rt; /* back pointer to route */ 109 struct pklcd *lx_lcd; /* local connection block */ 110 struct x25_ifaddr *lx_ia; /* may not be same as rt_ifa */ 111 int lx_state; /* can't trust lcd->lcd_state */ 112 int lx_flags; 113 int lx_timer; /* for idle timeout */ 114 int lx_family; /* for dispatch */ 115 }; 116 117 /* States for lx_state */ 118 #define LXS_NEWBORN 0 119 #define LXS_RESOLVING 1 120 #define LXS_FREE 2 121 #define LXS_CONNECTING 3 122 #define LXS_CONNECTED 4 123 #define LXS_DISCONNECTING 5 124 #define LXS_LISTENING 6 125 126 /* flags */ 127 #define LXF_VALID 0x1 /* Circuit is live, etc. */ 128 #define LXF_RTHELD 0x2 /* this lcb references rtentry */ 129 #define LXF_LISTEN 0x4 /* accepting incoming calls */ 130 131 /* 132 * miscellenous debugging info 133 */ 134 struct mbuf_cache { 135 int mbc_size; 136 int mbc_num; 137 int mbc_oldsize; 138 struct mbuf **mbc_cache; 139 }; 140 141 #if defined(KERNEL) && defined(CCITT) 142 struct pkcb *pkcbhead; /* head of linked list of networks */ 143 struct pklcd *pk_listenhead; 144 struct pklcd *pk_attach(); 145 146 extern char *pk_name[], *pk_state[]; 147 int pk_t20, pk_t21, pk_t22, pk_t23; 148 #endif 149