189 lines
5.2 KiB
C
189 lines
5.2 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $FreeBSD$
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*
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*/
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/*
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* SPANS Signalling Manager
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* ---------------------------
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*
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* SPANS Connectionless Datagram Service (CLS) control blocks
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*
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*/
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#ifndef _SPANS_SPANSCLS_H
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#define _SPANS_SPANSCLS_H
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/*
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* Protocol constants
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*/
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#define SPANSARP_AGING (60 * ATM_HZ) /* ARP aging timer */
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#define SPANSARP_RETRY (3 * ATM_HZ) /* ARP retry timer */
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#define SPANSARP_MAXAGE 20 /* Max ARP entry age (minutes)*/
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#define SPANSARP_HASHSIZ 19 /* Hash table size */
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/*
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* SPANS CLS protocol structure. There will be one such structure for
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* each SPANS signalling instance.
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*/
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struct spanscls {
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struct spanscls *cls_next; /* Next attached cls instance */
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u_char cls_state; /* Protocol state (see below) */
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struct spans *cls_spans; /* Spans signalling instance */
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Atm_connection *cls_conn; /* Connection manager token */
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struct ip_nif *cls_ipnif; /* IP network interface */
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};
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/*
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* SPANS CLS Protocol States
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*/
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#define CLS_CLOSED 1 /* CLS PVC is closed */
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#define CLS_OPEN 2 /* CLS PVC is open */
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/*
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* Structure for SPANS ARP mappings. Each of these structures will contain
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* IP address to SPANS hardware address mappings. There will be one such
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* structure for each IP address currently in use.
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*/
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struct spansarp {
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struct arpmap sa_arpmap; /* Common entry header */
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struct spanscls *sa_cls; /* Interface where we learned answer */
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struct spansarp *sa_next; /* Hash chain */
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struct spansarp *sa_rnext; /* Retry chain */
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u_char sa_flags; /* Flags (see below) */
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u_char sa_origin; /* Origin (see below) */
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u_short sa_reftime; /* Entry reference time (minutes) */
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struct ipvcc *sa_ivp; /* IP VCCs waiting for answer */
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};
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#define sa_dstip sa_arpmap.am_dstip
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#define sa_dstatm sa_arpmap.am_dstatm
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#define sa_dstatmsub sa_arpmap.am_dstatmsub
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/*
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* Entry Flags
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*/
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#define SAF_VALID ARPF_VALID /* Entry is valid */
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#define SAF_REFRESH ARPF_REFRESH /* Entry has been refreshed */
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#define SAF_LOCKED 0x04 /* Entry is locked */
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/*
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* Entry Origin
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*/
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#define SAO_PERM ARP_ORIG_PERM /* Entry is permanently installed */
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#define SAO_LOOKUP 20 /* Learned via lookup */
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/*
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* SPANS CLS Packet Header
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*/
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struct spanscls_hdr {
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/* IEEE 802.6 MAC header */
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spans_addr ch_dst; /* Destination SPANS address */
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spans_addr ch_src; /* Source SPANS address */
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u_char ch_proto; /* */
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u_char ch_extlen; /* */
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u_short ch_bridging; /* */
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/* LLC SNAP header */
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u_char ch_dsap; /* Destination SAP */
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u_char ch_ssap; /* Source SAP */
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u_char ch_ctl; /* Control field */
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u_char ch_oui[3]; /* Organizationally Unique Identifier */
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u_short ch_pid; /* Protocol Identifier */
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};
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/*
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* SPANS ARP Packet Format
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*/
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struct spansarp_hdr {
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u_short ah_hrd; /* Hardware type (see below) */
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u_short ah_pro; /* Protocol type */
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u_char ah_hln; /* Length of hardware address */
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u_char ah_pln; /* Length of protocol address */
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u_short ah_op; /* Operation code (see below) */
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spans_addr ah_sha; /* Source hardware address */
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u_char ah_spa[4]; /* Source protocol address */
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spans_addr ah_tha; /* Target hardware address */
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u_char ah_tpa[4]; /* Target protocol address */
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};
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/*
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* Hardware types
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*/
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#define ARP_SPANS 0x4040
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/*
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* Operation types
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*/
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#define ARP_REQUEST 1 /* SPANSARP request */
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#define ARP_REPLY 2 /* SPANSARP response */
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#define ARP_PACKET_LEN \
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(sizeof(struct spanscls_hdr) + sizeof(struct spansarp_hdr))
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#ifdef _KERNEL
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/*
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* Macros for manipulating SPANS ARP tables and entries
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*/
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#define SPANSARP_HASH(ip) ((u_long)(ip) % SPANSARP_HASHSIZ)
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#define SPANSARP_ADD(sa) \
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{ \
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struct spansarp **h; \
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h = &spansarp_arptab[SPANSARP_HASH((sa)->sa_dstip.s_addr)]; \
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LINK2TAIL((sa), struct spansarp, *h, sa_next); \
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}
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#define SPANSARP_DELETE(sa) \
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{ \
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struct spansarp **h; \
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h = &spansarp_arptab[SPANSARP_HASH((sa)->sa_dstip.s_addr)]; \
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UNLINK((sa), struct spansarp, *h, sa_next); \
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}
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#define SPANSARP_LOOKUP(ip, sa) \
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{ \
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for ((sa) = spansarp_arptab[SPANSARP_HASH(ip)]; \
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(sa); (sa) = (sa)->sa_next) { \
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if ((sa)->sa_dstip.s_addr == (ip)) \
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break; \
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} \
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}
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/*
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* External variables
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*/
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extern struct spanscls *spanscls_head;
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extern struct spanscls_hdr spanscls_hdr;
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#endif /* _KERNEL */
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#endif /* _SPANS_SPANSCLS_H */
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