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 7.3 (Berkeley) 05/16/90 13 */ 14 15 /* 16 * Protocol-Protocol Packet Buffer. 17 * (Eventually will be replace by system-wide structure). 18 */ 19 20 struct pq { 21 int (*pq_put)(); /* How to process data */ 22 struct mbuf *pq_data; /* Queued data */ 23 int pq_space; /* For accounting */ 24 int pq_flags; 25 int (*pq_unblock)();/* called & cleared when unblocking */ 26 caddr_t pq_proto; /* for other service entries */ 27 caddr_t pq_next; /* next q, or route, or pcb */ 28 }; 29 30 /* 31 * 32 * X.25 Logical Channel Descriptor 33 * 34 */ 35 36 struct pklcd { 37 struct pq lcd_downq, lcd_upq; /* protocol glue for datagram service */ 38 short lcd_lcn; /* Logical channel number */ 39 short lcd_state; /* Logical Channel state */ 40 bool lcd_intrconf_pending; /* Interrupt confirmation pending */ 41 octet lcd_intrdata; /* Octet of incoming intr data */ 42 short lcd_timer; /* Various timer values */ 43 short lcd_dg_timer; /* to reclaim idle datagram circuits */ 44 char lcd_retry; /* Timer retry count */ 45 char lcd_rsn; /* Seq no of last received packet */ 46 char lcd_ssn; /* Seq no of next packet to send */ 47 char lcd_output_window; /* Output flow control window */ 48 char lcd_input_window; /* Input flow control window */ 49 char lcd_last_transmitted_pr;/* Last Pr value transmitted */ 50 bool lcd_rnr_condition; /* Remote in busy condition */ 51 bool lcd_window_condition; /* Output window size exceeded */ 52 bool lcd_reset_condition; /* True, if waiting reset confirm */ 53 char lcd_packetsize; /* Maximum packet size */ 54 char lcd_windowsize; /* Window size - both directions */ 55 octet lcd_closed_user_group; /* Closed user group specification */ 56 char lcd_flags; /* copy of sockaddr_x25 op_flags */ 57 struct x25_packet *lcd_template;/* Address of current packet */ 58 struct socket *lcd_so; /* Socket addr for connection */ 59 struct sockaddr_x25 *lcd_craddr;/* Calling address */ 60 struct sockaddr_x25 *lcd_ceaddr;/* Called address */ 61 time_t lcd_stime; /* time circuit established */ 62 long lcd_txcnt; /* Data packet transmit count */ 63 long lcd_rxcnt; /* Data packet receive count */ 64 short lcd_intrcnt; /* Interrupt packet transmit count */ 65 struct pklcd *lcd_listen; /* Next lcd on listen queue */ 66 struct pkcb *lcd_pkp; /* network this lcd is attached to */ 67 }; 68 69 #define X25_DG_CIRCUIT 0x10 /* lcd_flag: used for datagrams */ 70 #define X25_DG_ROUTING 0x20 /* lcd_flag: peer addr not yet known */ 71 72 /* 73 * Per network information, allocated dynamically 74 * when a new network is configured. 75 */ 76 77 struct pkcb { 78 struct pkcb *pk_next; 79 struct x25_ifaddr *pk_ia; /* backpointer to ifaddr */ 80 short pk_state; /* packet level status */ 81 int (*pk_output) (); /* link level output procedure */ 82 struct x25config *pk_xcp; /* network specific configuration */ 83 struct x25config pk_xc; /* network specific configuration */ 84 struct pklcd **pk_chan; /* actual size == xc_maxlcn+1 */ 85 #define pk_maxlcn pk_xc.xc_maxlcn /* local copy of xc_maxlcn */ 86 }; 87 /* 88 * Interface address, x25 version. Exactly one of these structures is 89 * allocated for each interface with an x25 address. 90 * 91 * The ifaddr structure conatins the protocol-independent part 92 * of the structure, and is assumed to be first. 93 */ 94 struct x25_ifaddr { 95 struct ifaddr ia_ifa; /* protocol-independent info */ 96 #define ia_ifp ia_ifa.ifa_ifp 97 #define ia_flags ia_ifa.ifa_flags 98 struct pkcb ia_pkcb; /* per network information */ 99 #define ia_maxlcn ia_pkcb.pk_maxlcn 100 #define ia_chan ia_pkcb.pk_chan 101 #define ia_addr ia_pkcb.pk_xc.xc_addr 102 struct sockaddr_x25 ia_sockmask; /* reserve space for netmask */ 103 }; 104 105 /* 106 * ``Link-Level'' extension to Routing Entry for upper level 107 * packet switching via X.25 virtual circuits. 108 */ 109 struct rtextension_x25 { 110 struct pklcd *rtx_lcd; /* local connection block */ 111 struct rtentry *rtx_rt; /* back pointer to route */ 112 struct x25_ifaddr *rtx_ia; /* may not be same as rt_ifa */ 113 int rtx_state; /* can't trust lcd->lcd_state */ 114 int rtx_flags; 115 int rtx_timer; /* for idle timeout */ 116 }; 117 118 /* States for rtx_state */ 119 #define XRS_NEWBORN 0 120 #define XRS_RESOLVING 1 121 #define XRS_FREE 2 122 #define XRS_CONNECTED 3 123 #define XRS_CONNECTING 4 124 #define XRS_DISCONNECTING 5 125 126 /* flags */ 127 #define XRF_VALID 0x1 /* Circuit is live, etc. */ 128 #define XRF_RTHELD 0x2 /* this lcb references rtentry */ 129 130 #ifdef KERNEL 131 struct pkcb *pkcbhead; /* head of linked list of networks */ 132 struct pklcd *pk_listenhead; 133 134 char *pk_name[], *pk_state[]; 135 int pk_t20, pk_t21, pk_t22, pk_t23; 136 #endif 137