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/*
*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*
* @(#) $Id: spans_cls.h,v 1.6 1998/05/18 19:11:17 mks Exp $
*
*/
/*
* SPANS Signalling Manager
* ---------------------------
*
* SPANS Connectionless Datagram Service (CLS) control blocks
*
*/
#ifndef _SPANS_SPANSCLS_H
#define _SPANS_SPANSCLS_H
/*
* Protocol constants
*/
#define SPANSARP_AGING (60 * ATM_HZ) /* ARP aging timer */
#define SPANSARP_RETRY (3 * ATM_HZ) /* ARP retry timer */
#define SPANSARP_MAXAGE 20 /* Max ARP entry age (minutes)*/
#define SPANSARP_HASHSIZ 19 /* Hash table size */
/*
* SPANS CLS protocol structure. There will be one such structure for
* each SPANS signalling instance.
*/
struct spanscls {
struct spanscls *cls_next; /* Next attached cls instance */
u_char cls_state; /* Protocol state (see below) */
struct spans *cls_spans; /* Spans signalling instance */
Atm_connection *cls_conn; /* Connection manager token */
struct ip_nif *cls_ipnif; /* IP network interface */
};
/*
* SPANS CLS Protocol States
*/
#define CLS_CLOSED 1 /* CLS PVC is closed */
#define CLS_OPEN 2 /* CLS PVC is open */
/*
* Structure for SPANS ARP mappings. Each of these structures will contain
* IP address to SPANS hardware address mappings. There will be one such
* structure for each IP address currently in use.
*/
struct spansarp {
struct arpmap sa_arpmap; /* Common entry header */
struct spanscls *sa_cls; /* Interface where we learned answer */
struct spansarp *sa_next; /* Hash chain */
struct spansarp *sa_rnext; /* Retry chain */
u_char sa_flags; /* Flags (see below) */
u_char sa_origin; /* Origin (see below) */
u_short sa_reftime; /* Entry reference time (minutes) */
struct ipvcc *sa_ivp; /* IP VCCs waiting for answer */
};
#define sa_dstip sa_arpmap.am_dstip
#define sa_dstatm sa_arpmap.am_dstatm
#define sa_dstatmsub sa_arpmap.am_dstatmsub
/*
* Entry Flags
*/
#define SAF_VALID ARPF_VALID /* Entry is valid */
#define SAF_REFRESH ARPF_REFRESH /* Entry has been refreshed */
#define SAF_LOCKED 0x04 /* Entry is locked */
/*
* Entry Origin
*/
#define SAO_PERM ARP_ORIG_PERM /* Entry is permanently installed */
#define SAO_LOOKUP 20 /* Learned via lookup */
/*
* SPANS CLS Packet Header
*/
struct spanscls_hdr {
/* IEEE 802.6 MAC header */
spans_addr ch_dst; /* Destination SPANS address */
spans_addr ch_src; /* Source SPANS address */
u_char ch_proto; /* */
u_char ch_extlen; /* */
u_short ch_bridging; /* */
/* LLC SNAP header */
u_char ch_dsap; /* Destination SAP */
u_char ch_ssap; /* Source SAP */
u_char ch_ctl; /* Control field */
u_char ch_oui[3]; /* Organizationally Unique Identifier */
u_short ch_pid; /* Protocol Identifier */
};
/*
* SPANS ARP Packet Format
*/
struct spansarp_hdr {
u_short ah_hrd; /* Hardware type (see below) */
u_short ah_pro; /* Protocol type */
u_char ah_hln; /* Length of hardware address */
u_char ah_pln; /* Length of protocol address */
u_short ah_op; /* Operation code (see below) */
spans_addr ah_sha; /* Source hardware address */
u_char ah_spa[4]; /* Source protocol address */
spans_addr ah_tha; /* Target hardware address */
u_char ah_tpa[4]; /* Target protocol address */
};
/*
* Hardware types
*/
#define ARP_SPANS 0x4040
/*
* Operation types
*/
#define ARP_REQUEST 1 /* SPANSARP request */
#define ARP_REPLY 2 /* SPANSARP response */
#define ARP_PACKET_LEN \
(sizeof(struct spanscls_hdr) + sizeof(struct spansarp_hdr))
#ifdef ATM_KERNEL
/*
* Macros for manipulating SPANS ARP tables and entries
*/
#define SPANSARP_HASH(ip) ((u_long)(ip) % SPANSARP_HASHSIZ)
#define SPANSARP_ADD(sa) \
{ \
struct spansarp **h; \
h = &spansarp_arptab[SPANSARP_HASH((sa)->sa_dstip.s_addr)]; \
LINK2TAIL((sa), struct spansarp, *h, sa_next); \
}
#define SPANSARP_DELETE(sa) \
{ \
struct spansarp **h; \
h = &spansarp_arptab[SPANSARP_HASH((sa)->sa_dstip.s_addr)]; \
UNLINK((sa), struct spansarp, *h, sa_next); \
}
#define SPANSARP_LOOKUP(ip, sa) \
{ \
for ((sa) = spansarp_arptab[SPANSARP_HASH(ip)]; \
(sa); (sa) = (sa)->sa_next) { \
if ((sa)->sa_dstip.s_addr == (ip)) \
break; \
} \
}
/*
* External variables
*/
extern struct spanscls *spanscls_head;
extern struct spanscls_hdr spanscls_hdr;
#endif /* ATM_KERNEL */
#endif /* _SPANS_SPANSCLS_H */
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