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freebsd-dev/usr.sbin/atm/scspd/scsp_subr.c
Peter Wemm 97d92980a9 $Id$ -> $FreeBSD$
1999-08-28 01:35:59 +00:00

1124 lines
21 KiB
C
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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.
*
* @(#) $FreeBSD$
*
*/
/*
* Server Cache Synchronization Protocol (SCSP) Support
* ----------------------------------------------------
*
* SCSP subroutines
*
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_sigmgr.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_ioctl.h>
#include <netatm/uni/unisig_var.h>
#include <errno.h>
#include <libatm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include <unistd.h>
#include "scsp_msg.h"
#include "scsp_if.h"
#include "scsp_var.h"
#ifndef lint
__RCSID("@(#) $FreeBSD$");
#endif
/*
* Hash an SCSP cache key
*
* Arguments:
* ckp pointer to an SCSP cache key structure
*
* Returns:
* hashed value
*
*/
int
scsp_hash(ckp)
Scsp_ckey *ckp;
{
int i, j, h;
/*
* Turn cache key into a positive integer
*/
h = 0;
for (i = ckp->key_len-1, j = 0;
i > 0 && j < sizeof(int);
i--, j++)
h = (h << 8) + ckp->key[i];
h = abs(h);
/*
* Return the hashed value
*/
return(h % SCSP_HASHSZ);
}
/*
* Compare two SCSP IDs
*
* Arguments:
* id1p pointer to an SCSP ID structure
* id2p pointer to an SCSP ID structure
*
* Returns:
* < 0 id1 is less than id2
* 0 id1 and id2 are equal
* > 0 id1 is greater than id2
*
*/
int
scsp_cmp_id(id1p, id2p)
Scsp_id *id1p;
Scsp_id *id2p;
{
int diff, i;
/*
* Compare the two IDs, byte for byte
*/
for (i = 0; i < id1p->id_len && i < id2p->id_len; i++) {
diff = id1p->id[i] - id2p->id[i];
if (diff) {
return(diff);
}
}
/*
* IDs are equal. If lengths differ, the longer ID is
* greater than the shorter.
*/
return(id1p->id_len - id2p->id_len);
}
/*
* Compare two SCSP cache keys
*
* Arguments:
* ck1p pointer to an SCSP cache key structure
* ck2p pointer to an SCSP cache key structure
*
* Returns:
* < 0 ck1 is less than ck2
* 0 ck1 and ck2 are equal
* > 0 ck1 is greater than ck2
*
*/
int
scsp_cmp_key(ck1p, ck2p)
Scsp_ckey *ck1p;
Scsp_ckey *ck2p;
{
int diff, i;
/*
* Compare the two keys, byte for byte
*/
for (i = 0; i < ck1p->key_len && i < ck2p->key_len; i++) {
diff = ck1p->key[i] - ck2p->key[i];
if (diff)
return(diff);
}
/*
* Keys are equal. If lengths differ, the longer key is
* greater than the shorter.
*/
return(ck1p->key_len - ck2p->key_len);
}
/*
* Check whether the host system is an ATMARP server for
* the LIS associated with a given interface
*
* Arguments:
* netif pointer to the network interface name
*
* Returns:
* 1 host is a server
* 0 host is not a server
*
*/
int
scsp_is_atmarp_server(netif)
char *netif;
{
int rc;
int buf_len = sizeof(struct air_asrv_rsp);
struct atminfreq air;
struct air_asrv_rsp *asrv_info;
/*
* Get interface information from the kernel
*/
strcpy(air.air_int_intf, netif);
air.air_opcode = AIOCS_INF_ASV;
buf_len = do_info_ioctl(&air, buf_len);
if (buf_len < 0)
return(0);
/*
* Check the interface's ATMARP server address
*/
asrv_info = (struct air_asrv_rsp *) air.air_buf_addr;
rc = (asrv_info->asp_addr.address_format == T_ATM_ABSENT) &&
(asrv_info->asp_subaddr.address_format ==
T_ATM_ABSENT);
UM_FREE(asrv_info);
return(rc);
}
/*
* Make a copy of a cache summary entry
*
* Arguments:
* csep pointer to CSE entry to copy
*
* Returns:
* 0 copy failed
* else pointer to new CSE entry
*
*/
Scsp_cse *
scsp_dup_cse(csep)
Scsp_cse *csep;
{
Scsp_cse *dupp;
/*
* Allocate memory for the duplicate
*/
dupp = (Scsp_cse *)UM_ALLOC(sizeof(Scsp_cse));
if (!dupp) {
scsp_mem_err("scsp_dup_cse: sizeof(Scsp_cse)");
}
/*
* Copy data to the duplicate
*/
UM_COPY(csep, dupp, sizeof(Scsp_cse));
dupp->sc_next = (Scsp_cse *)0;
return(dupp);
}
/*
* Make a copy of a CSA or CSAS record
*
* Arguments:
* csap pointer to CSE entry to copy
*
* Returns:
* 0 copy failed
* else pointer to new CSA or CSAS record
*
*/
Scsp_csa *
scsp_dup_csa(csap)
Scsp_csa *csap;
{
Scsp_csa *dupp;
Scsp_atmarp_csa *adp;
/*
* Allocate memory for the duplicate
*/
dupp = (Scsp_csa *)UM_ALLOC(sizeof(Scsp_csa));
if (!dupp) {
scsp_mem_err("scsp_dup_csa: sizeof(Scsp_csa)");
}
/*
* Copy data to the duplicate
*/
UM_COPY(csap, dupp, sizeof(Scsp_csa));
dupp->next = (Scsp_csa *)0;
/*
* Copy protocol-specific data, if it's present
*/
if (csap->atmarp_data) {
adp = (Scsp_atmarp_csa *)UM_ALLOC(sizeof(Scsp_atmarp_csa));
if (!adp) {
scsp_mem_err("scsp_dup_csa: sizeof(Scsp_atmarp_csa)");
}
UM_COPY(csap->atmarp_data, adp, sizeof(Scsp_atmarp_csa));
dupp->atmarp_data = adp;
}
return(dupp);
}
/*
* Copy a cache summary entry into a CSAS
*
* Arguments:
* csep pointer to CSE entry to copy
*
* Returns:
* 0 copy failed
* else pointer to CSAS record summarizing the entry
*
*/
Scsp_csa *
scsp_cse2csas(csep)
Scsp_cse *csep;
{
Scsp_csa *csap;
/*
* Allocate memory for the duplicate
*/
csap = (Scsp_csa *)UM_ALLOC(sizeof(Scsp_csa));
if (!csap) {
scsp_mem_err("scsp_cse2csas: sizeof(Scsp_csa)");
}
UM_ZERO(csap, sizeof(Scsp_csa));
/*
* Copy data to the CSAS entry
*/
csap->seq = csep->sc_seq;
csap->key = csep->sc_key;
csap->oid = csep->sc_oid;
return(csap);
}
/*
* Copy an ATMARP cache entry into a cache summary entry
*
* Arguments:
* aap pointer to ATMARP cache entry to copy
*
* Returns:
* 0 copy failed
* else pointer to CSE record summarizing the entry
*
*/
Scsp_cse *
scsp_atmarp2cse(aap)
Scsp_atmarp_msg *aap;
{
Scsp_cse *csep;
/*
* Allocate memory for the duplicate
*/
csep = (Scsp_cse *)UM_ALLOC(sizeof(Scsp_cse));
if (!csep) {
scsp_mem_err("scsp_atmarp2cse: sizeof(Scsp_cse)");
}
UM_ZERO(csep, sizeof(Scsp_cse));
/*
* Copy data to the CSE entry
*/
csep->sc_seq = aap->sa_seq;
csep->sc_key = aap->sa_key;
csep->sc_oid = aap->sa_oid;
return(csep);
}
/*
* Clean up a DCS block. This routine is called to clear out any
* lingering state information when the CA FSM reverts to an 'earlier'
* state (Down or Master/Slave Negotiation).
*
* Arguments:
* dcsp pointer to a DCS control block for the neighbor
*
* Returns:
* none
*
*/
void
scsp_dcs_cleanup(dcsp)
Scsp_dcs *dcsp;
{
Scsp_cse *csep, *ncsep;
Scsp_csa *csap, *next_csap;
Scsp_csu_rexmt *rxp, *rx_next;
/*
* Free any CSAS entries waiting to be sent
*/
for (csep = dcsp->sd_ca_csas; csep; csep = ncsep) {
ncsep = csep->sc_next;
UNLINK(csep, Scsp_cse, dcsp->sd_ca_csas, sc_next);
UM_FREE(csep);
}
/*
* Free any entries on the CRL
*/
for (csap = dcsp->sd_crl; csap; csap = next_csap) {
next_csap = csap->next;
UNLINK(csap, Scsp_csa, dcsp->sd_crl, next);
SCSP_FREE_CSA(csap);
}
/*
* Free any saved CA message and cancel the CA
* retransmission timer
*/
if (dcsp->sd_ca_rexmt_msg) {
scsp_free_msg(dcsp->sd_ca_rexmt_msg);
dcsp->sd_ca_rexmt_msg = (Scsp_msg *)0;
}
HARP_CANCEL(&dcsp->sd_ca_rexmt_t);
/*
* Free any saved CSU Solicit message and cancel the CSUS
* retransmission timer
*/
if (dcsp->sd_csus_rexmt_msg) {
scsp_free_msg(dcsp->sd_csus_rexmt_msg);
dcsp->sd_csus_rexmt_msg = (Scsp_msg *)0;
}
HARP_CANCEL(&dcsp->sd_csus_rexmt_t);
/*
* Free any entries on the CSU Request retransmission queue
*/
for (rxp = dcsp->sd_csu_rexmt; rxp; rxp = rx_next) {
rx_next = rxp->sr_next;
HARP_CANCEL(&rxp->sr_t);
for (csap = rxp->sr_csa; csap; csap = next_csap) {
next_csap = csap->next;
SCSP_FREE_CSA(csap);
}
UNLINK(rxp, Scsp_csu_rexmt, dcsp->sd_csu_rexmt,
sr_next);
UM_FREE(rxp);
}
}
/*
* Delete an SCSP DCS block and any associated information
*
* Arguments:
* dcsp pointer to a DCS control block to delete
*
* Returns:
* none
*
*/
void
scsp_dcs_delete(dcsp)
Scsp_dcs *dcsp;
{
Scsp_cse *csep, *next_cse;
Scsp_csu_rexmt *rxp, *next_rxp;
Scsp_csa *csap, *next_csa;
/*
* Cancel any pending DCS timers
*/
HARP_CANCEL(&dcsp->sd_open_t);
HARP_CANCEL(&dcsp->sd_hello_h_t);
HARP_CANCEL(&dcsp->sd_hello_rcv_t);
HARP_CANCEL(&dcsp->sd_ca_rexmt_t);
HARP_CANCEL(&dcsp->sd_csus_rexmt_t);
/*
* Unlink the DCS block from the server block
*/
UNLINK(dcsp, Scsp_dcs, dcsp->sd_server->ss_dcs, sd_next);
/*
* Close the VCC to the DCS, if one is open
*/
if (dcsp->sd_sock != -1) {
(void)close(dcsp->sd_sock);
}
/*
* Free any saved CA message
*/
if (dcsp->sd_ca_rexmt_msg) {
scsp_free_msg(dcsp->sd_ca_rexmt_msg);
}
/*
* Free any pending CSAs waiting for cache alignment
*/
for (csep = dcsp->sd_ca_csas; csep; csep = next_cse) {
next_cse = csep->sc_next;
UM_FREE(csep);
}
/*
* Free anything on the cache request list
*/
for (csap = dcsp->sd_crl; csap; csap = next_csa) {
next_csa = csap->next;
SCSP_FREE_CSA(csap);
}
/*
* Free any saved CSUS message
*/
if (dcsp->sd_csus_rexmt_msg) {
scsp_free_msg(dcsp->sd_csus_rexmt_msg);
}
/*
* Free anything on the CSU Request retransmit queue
*/
for (rxp = dcsp->sd_csu_rexmt; rxp; rxp = next_rxp) {
/*
* Cancel the retransmit timer
*/
HARP_CANCEL(&rxp->sr_t);
/*
* Free the CSAs to be retransmitted
*/
for (csap = rxp->sr_csa; csap; csap = next_csa) {
next_csa = csap->next;
SCSP_FREE_CSA(csap);
}
/*
* Free the CSU Req retransmission control block
*/
next_rxp = rxp->sr_next;
UM_FREE(rxp);
}
/*
* Free the DCS block
*/
UM_FREE(dcsp);
}
/*
* Shut down a server. This routine is called when a connection to
* a server is lost. It will clear the server's state without deleting
* the server.
*
* Arguments:
* ssp pointer to a server control block
*
* Returns:
* none
*
*/
void
scsp_server_shutdown(ssp)
Scsp_server *ssp;
{
int i;
Scsp_dcs *dcsp;
Scsp_cse *csep;
/*
* Trace the shutdown
*/
if (scsp_trace_mode & (SCSP_TRACE_IF_MSG | SCSP_TRACE_CFSM)) {
scsp_trace("Server %s being shut down\n",
ssp->ss_name);
}
/*
* Terminate up all the DCS connections and clean
* up the control blocks
*/
for (dcsp = ssp->ss_dcs; dcsp; dcsp = dcsp->sd_next) {
if (dcsp->sd_sock != -1) {
(void)close(dcsp->sd_sock);
dcsp->sd_sock = -1;
}
HARP_CANCEL(&dcsp->sd_open_t);
HARP_CANCEL(&dcsp->sd_hello_h_t);
HARP_CANCEL(&dcsp->sd_hello_rcv_t);
scsp_dcs_cleanup(dcsp);
dcsp->sd_hello_state = SCSP_HFSM_DOWN;
dcsp->sd_ca_state = SCSP_CAFSM_DOWN;
dcsp->sd_client_state = SCSP_CIFSM_NULL;
}
/*
* Clean up the server control block
*/
if (ssp->ss_sock != -1) {
(void)close(ssp->ss_sock);
ssp->ss_sock = -1;
}
if (ssp->ss_dcs_lsock != -1) {
(void)close(ssp->ss_dcs_lsock);
ssp->ss_dcs_lsock = -1;
}
ssp->ss_state = SCSP_SS_NULL;
/*
* Free the entries in the server's summary cache
*/
for (i = 0; i < SCSP_HASHSZ; i++) {
while (ssp->ss_cache[i]) {
csep = ssp->ss_cache[i];
UNLINK(csep, Scsp_cse, ssp->ss_cache[i],
sc_next);
UM_FREE(csep);
}
}
}
/*
* Delete an SCSP server block and any associated information
*
* Arguments:
* ssp pointer to a server control block to delete
*
* Returns:
* none
*
*/
void
scsp_server_delete(ssp)
Scsp_server *ssp;
{
int i;
Scsp_dcs *dcsp, *next_dcs;
Scsp_cse *csep, *next_cse;
/*
* Unlink the server block from the chain
*/
UNLINK(ssp, Scsp_server, scsp_server_head, ss_next);
/*
* Free the DCS blocks associated with the server
*/
for (dcsp = ssp->ss_dcs; dcsp; dcsp = next_dcs) {
next_dcs = dcsp->sd_next;
scsp_dcs_delete(dcsp);
}
/*
* Free the entries in the server's summary cache
*/
for (i = 0; i < SCSP_HASHSZ; i++) {
for (csep = ssp->ss_cache[i]; csep; csep = next_cse) {
next_cse = csep->sc_next;
UM_FREE(csep);
}
}
/*
* Free the server block
*/
UM_FREE(ssp->ss_name);
UM_FREE(ssp);
}
/*
* Get informtion about a server from the kernel
*
* Arguments:
* ssp pointer to the server block
*
* Returns:
* 0 server info is OK
* errno server is not ready
*
*/
int
scsp_get_server_info(ssp)
Scsp_server *ssp;
{
int i, len, mtu, rc, sel;
struct atminfreq air;
struct air_netif_rsp *netif_rsp = (struct air_netif_rsp *)0;
struct air_int_rsp *intf_rsp = (struct air_int_rsp *)0;
struct air_cfg_rsp *cfg_rsp = (struct air_cfg_rsp *)0;
struct sockaddr_in *ip_addr;
Atm_addr_nsap *anp;
/*
* Make sure we're the server for the interface
*/
if (!scsp_is_atmarp_server(ssp->ss_intf)) {
rc = EINVAL;
goto server_info_done;
}
/*
* Get the IP address and physical interface name
* associated with the network interface
*/
UM_ZERO(&air, sizeof(struct atminfreq));
air.air_opcode = AIOCS_INF_NIF;
strcpy(air.air_netif_intf, ssp->ss_intf);
len = do_info_ioctl(&air, sizeof(struct air_netif_rsp));
if (len <= 0) {
rc = EIO;
goto server_info_done;
}
netif_rsp = (struct air_netif_rsp *)air.air_buf_addr;
ip_addr = (struct sockaddr_in *)&netif_rsp->anp_proto_addr;
if (ip_addr->sin_family != AF_INET ||
ip_addr->sin_addr.s_addr == 0) {
rc = EADDRNOTAVAIL;
goto server_info_done;
}
/*
* Get the MTU for the network interface
*/
mtu = get_mtu(ssp->ss_intf);
if (mtu < 0) {
rc = EIO;
goto server_info_done;
}
/*
* Get the ATM address associated with the
* physical interface
*/
UM_ZERO(&air, sizeof(struct atminfreq));
air.air_opcode = AIOCS_INF_INT;
strcpy(air.air_int_intf, netif_rsp->anp_phy_intf);
len = do_info_ioctl(&air, sizeof(struct air_int_rsp));
if (len <= 0) {
rc = EIO;
goto server_info_done;
}
intf_rsp = (struct air_int_rsp *)air.air_buf_addr;
/*
* Make sure we're running UNI signalling
*/
if (intf_rsp->anp_sig_proto != ATM_SIG_UNI30 &&
intf_rsp->anp_sig_proto != ATM_SIG_UNI31 &&
intf_rsp->anp_sig_proto != ATM_SIG_UNI40) {
rc = EINVAL;
goto server_info_done;
}
/*
* Check the physical interface's state
*/
if (intf_rsp->anp_sig_state != UNISIG_ACTIVE) {
rc = EHOSTDOWN;
goto server_info_done;
}
/*
* Make sure the interface's address is valid
*/
if (intf_rsp->anp_addr.address_format != T_ATM_ENDSYS_ADDR &&
!(intf_rsp->anp_addr.address_format ==
T_ATM_E164_ADDR &&
intf_rsp->anp_subaddr.address_format ==
T_ATM_ENDSYS_ADDR)) {
rc = EINVAL;
goto server_info_done;
}
/*
* Find the selector byte value for the interface
*/
for (i=0; i<strlen(ssp->ss_intf); i++) {
if (ssp->ss_intf[i] >= '0' &&
ssp->ss_intf[i] <= '9')
break;
}
sel = atoi(&ssp->ss_intf[i]);
/*
* Get configuration information associated with the
* physical interface
*/
UM_ZERO(&air, sizeof(struct atminfreq));
air.air_opcode = AIOCS_INF_CFG;
strcpy(air.air_int_intf, netif_rsp->anp_phy_intf);
len = do_info_ioctl(&air, sizeof(struct air_cfg_rsp));
if (len <= 0) {
rc = EIO;
goto server_info_done;
}
cfg_rsp = (struct air_cfg_rsp *)air.air_buf_addr;
/*
* Update the server entry
*/
UM_COPY(&ip_addr->sin_addr, ssp->ss_lsid.id, ssp->ss_id_len);
ssp->ss_lsid.id_len = ssp->ss_id_len;
ssp->ss_mtu = mtu + 8;
ATM_ADDR_COPY(&intf_rsp->anp_addr, &ssp->ss_addr);
ATM_ADDR_COPY(&intf_rsp->anp_subaddr, &ssp->ss_subaddr);
if (ssp->ss_addr.address_format == T_ATM_ENDSYS_ADDR) {
anp = (Atm_addr_nsap *)ssp->ss_addr.address;
anp->aan_sel = sel;
} else if (ssp->ss_addr.address_format == T_ATM_E164_ADDR &&
ssp->ss_subaddr.address_format ==
T_ATM_ENDSYS_ADDR) {
anp = (Atm_addr_nsap *)ssp->ss_subaddr.address;
anp->aan_sel = sel;
}
ssp->ss_media = cfg_rsp->acp_cfg.ac_media;
rc = 0;
/*
* Free dynamic data
*/
server_info_done:
if (netif_rsp)
UM_FREE(netif_rsp);
if (intf_rsp)
UM_FREE(intf_rsp);
if (cfg_rsp)
UM_FREE(cfg_rsp);
return(rc);
}
/*
* Process a CA message
*
* Arguments:
* dcsp pointer to a DCS control block for the neighbor
* cap pointer to the CA part of the received message
*
* Returns:
* none
*
*/
void
scsp_process_ca(dcsp, cap)
Scsp_dcs *dcsp;
Scsp_ca *cap;
{
Scsp_csa *csap, *next_csap;
Scsp_cse *csep;
Scsp_server *ssp = dcsp->sd_server;
/*
* Process CSAS records from the CA message
*/
for (csap = cap->ca_csa_rec; csap; csap = next_csap) {
next_csap = csap->next;
SCSP_LOOKUP(ssp, &csap->key, csep);
if (!csep || (scsp_cmp_id(&csap->oid,
&csep->sc_oid) == 0 &&
csap->seq > csep->sc_seq)) {
/*
* CSAS entry not in cache or more
* up to date than cache, add it to CRL
*/
UNLINK(csap, Scsp_csa, cap->ca_csa_rec, next);
LINK2TAIL(csap, Scsp_csa, dcsp->sd_crl, next);
}
}
}
/*
* Process a Cache Response message from a server
*
* Arguments:
* ssp pointer to the server block
* smp pointer to the message
*
* Returns:
* none
*
*/
void
scsp_process_cache_rsp(ssp, smp)
Scsp_server *ssp;
Scsp_if_msg *smp;
{
int len;
Scsp_atmarp_msg *aap;
Scsp_cse *csep;
/*
* Loop through the message, processing each cache entry
*/
len = smp->si_len;
len -= sizeof(Scsp_if_msg_hdr);
aap = &smp->si_atmarp;
while (len > 0) {
switch(smp->si_proto) {
case SCSP_ATMARP_PROTO:
/*
* If we already have an entry with this key,
* delete it
*/
SCSP_LOOKUP(ssp, &aap->sa_key, csep);
if (csep) {
SCSP_DELETE(ssp, csep);
UM_FREE(csep);
}
/*
* Copy the data from the server to a cache
* summary entry
*/
csep = scsp_atmarp2cse(aap);
/*
* Point past this entry
*/
len -= sizeof(Scsp_atmarp_msg);
aap++;
break;
case SCSP_NHRP_PROTO:
default:
/*
* Not implemented yet
*/
return;
}
/*
* Add the new summary entry to the cache
*/
SCSP_ADD(ssp, csep);
}
}
/*
* Propagate a CSA to all the DCSs in the server group except
* the one the CSA was received from
*
* Arguments:
* dcsp pointer to a the DCS the CSA came from
* csap pointer to a the CSA
*
* Returns:
* 0 success
* errno error encountered
*
*/
int
scsp_propagate_csa(dcsp, csap)
Scsp_dcs *dcsp;
Scsp_csa *csap;
{
int rc, ret_rc = 0;
Scsp_server *ssp = dcsp->sd_server;
Scsp_dcs *dcsp1;
Scsp_csa *csap1;
/*
* Check the hop count in the CSA
*/
if (csap->hops <= 1)
return(0);
/*
* Pass the cache entry on to the server's other DCSs
*/
for (dcsp1 = ssp->ss_dcs; dcsp1; dcsp1 = dcsp1->sd_next) {
/*
* Skip this DCS if it's the one we got
* the entry from
*/
if (dcsp1 == dcsp)
continue;
/*
* Copy the CSA
*/
csap1 = scsp_dup_csa(csap);
/*
* Decrement the hop count
*/
csap1->hops--;
/*
* Send the copy of the CSA to the CA FSM for the DCS
*/
rc = scsp_cafsm(dcsp1, SCSP_CAFSM_CACHE_UPD,
(void *) csap1);
if (rc)
ret_rc = rc;
}
return(ret_rc);
}
/*
* Update SCSP's cache given a CSA or CSAS
*
* Arguments:
* dcsp pointer to a DCS
* csap pointer to a CSA
*
* Returns:
* none
*
*/
void
scsp_update_cache(dcsp, csap)
Scsp_dcs *dcsp;
Scsp_csa *csap;
{
Scsp_cse *csep;
/*
* Check whether we already have this in the cache
*/
SCSP_LOOKUP(dcsp->sd_server, &csap->key, csep);
/*
* If we don't already have it and it's not being deleted,
* build a new cache summary entry
*/
if (!csep && !csap->null) {
/*
* Get memory for a new entry
*/
csep = (Scsp_cse *)UM_ALLOC(sizeof(Scsp_cse));
if (!csep) {
scsp_mem_err("scsp_update_cache: sizeof(Scsp_cse)");
}
UM_ZERO(csep, sizeof(Scsp_cse));
/*
* Fill out the new cache summary entry
*/
csep->sc_seq = csap->seq;
csep->sc_key = csap->key;
csep->sc_oid = csap->oid;
/*
* Add the new entry to the cache
*/
SCSP_ADD(dcsp->sd_server, csep);
}
/*
* Update or delete the entry
*/
if (csap->null) {
/*
* The null flag is set--delete the entry
*/
if (csep) {
SCSP_DELETE(dcsp->sd_server, csep);
UM_FREE(csep);
}
} else {
/*
* Update the existing entry
*/
csep->sc_seq = csap->seq;
csep->sc_oid = csap->oid;
}
}
/*
* Reconfigure SCSP
*
* Called as the result of a SIGHUP interrupt. Reread the
* configuration file and solicit the cache from the server.
*
* Arguments:
* none
*
* Returns:
* none
*
*/
void
scsp_reconfigure()
{
int rc;
Scsp_server *ssp;
/*
* Log a message saying we're reconfiguring
*/
scsp_log(LOG_ERR, "Reconfiguring ...");
/*
* Re-read the configuration file
*/
rc = scsp_config(scsp_config_file);
if (rc) {
scsp_log(LOG_ERR, "Found %d error%s in configuration file",
rc, ((rc == 1) ? "" : "s"));
exit(1);
}
/*
* If a connection to a server is open, get the cache from
* the server
*/
for (ssp = scsp_server_head; ssp; ssp = ssp->ss_next) {
if (ssp->ss_sock != -1) {
rc = scsp_send_cache_ind(ssp);
}
}
}
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