FreeBSD-5.3/usr.sbin/atm/scspd/scsp_msg.c
/*
*
* ===================================
* 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: src/usr.sbin/atm/scspd/scsp_msg.c,v 1.4 2002/05/16 23:57:37 arr Exp $
*
*/
/*
* Server Cache Synchronization Protocol (SCSP) Support
* ----------------------------------------------------
*
* SCSP message-handling routines
*
*/
#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_sys.h>
#include <netatm/atm_ioctl.h>
#include <errno.h>
#include <libatm.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <syslog.h>
#include "scsp_msg.h"
#include "scsp_if.h"
#include "scsp_var.h"
#ifndef lint
__RCSID("@(#) $FreeBSD: src/usr.sbin/atm/scspd/scsp_msg.c,v 1.4 2002/05/16 23:57:37 arr Exp $");
#endif
/*
* Copy CSAS records into a CA record
*
* Arguments:
* dcsp pointer to DCS block for DCS
* cap pointer to CA record for CSASs
*
*
* Returns:
* none
*
*/
static void
scsp_ca_csas_setup(dcsp, cap)
Scsp_dcs *dcsp;
Scsp_ca *cap;
{
int csas_len, len, mtu;
Scsp_server *ssp = dcsp->sd_server;
Scsp_cse *csep, *next_csep;
Scsp_csa *csap;
/*
* Loop through pending CSAS records
*/
len = sizeof(struct scsp_nhdr) + sizeof(struct scsp_nmcp) +
ssp->ss_lsid.id_len +
dcsp->sd_dcsid.id_len;
csas_len = sizeof(struct scsp_ncsa) +
dcsp->sd_server->ss_id_len +
dcsp->sd_server->ss_ckey_len;
mtu = dcsp->sd_server->ss_mtu;
for (csep = dcsp->sd_ca_csas;
csep && (len < mtu - csas_len);
csep = next_csep) {
next_csep = csep->sc_next;
csap = scsp_cse2csas(csep);
LINK2TAIL(csap, Scsp_csa, cap->ca_csa_rec, next);
len += csas_len;
UNLINK(csep, Scsp_cse, dcsp->sd_ca_csas, sc_next);
free(csep);
cap->ca_mcp.rec_cnt++;
}
}
/*
* Process CSA records from a CSU Request that may be in response to
* CSAS records sent in a CSUS
*
* Arguments:
* dcsp pointer to DCS control block
* msg pointer to received message
*
* Returns:
* none
*
*/
void
scsp_csus_ack(dcsp, msg)
Scsp_dcs *dcsp;
Scsp_msg *msg;
{
Scsp_csu_msg *csusp;
Scsp_csa *csap, *csasp, *next_csasp;
/*
* If this isn't a CSU Request, or there's no outstanding CSUS,
* or the outstanding CSUS has already been satisfied, just
* return
*/
if (!msg || msg->sc_msg_type != SCSP_CSU_REQ_MSG ||
!dcsp->sd_csus_rexmt_msg ||
!dcsp->sd_csus_rexmt_msg->sc_csu_msg ||
!dcsp->sd_csus_rexmt_msg->sc_csu_msg->csu_csa_rec)
return;
/*
* Loop through the CSASs in the CSUS message, checking for
* each in the CSA records of the received CSU Request
*/
csusp = dcsp->sd_csus_rexmt_msg->sc_csu_msg;
for (csasp = csusp->csu_csa_rec; csasp; csasp = next_csasp) {
next_csasp = csasp->next;
for (csap = msg->sc_csu_msg->csu_csa_rec;
csap; csap = csap->next) {
/*
* If the records match, unlink and free the
* CSAS from the CSUS
*/
if (scsp_cmp_key(&csap->key, &csasp->key) == 0 &&
scsp_cmp_key(&csap->key, &csasp->key) == 0 &&
scsp_cmp_id(&csap->oid, &csasp->oid) == 0 &&
csap->seq >= csasp->seq) {
UNLINK(csasp, Scsp_csa,
csusp->csu_csa_rec,
next);
SCSP_FREE_CSA(csasp);
dcsp->sd_csus_rexmt_msg->sc_csu_msg->csu_mcp.rec_cnt--;
break;
}
}
}
if (csusp->csu_csa_rec == (Scsp_csa *)0) {
/*
* All CSASs in the CSUS message have been
* answered. Stop the timer and free the
* saved message.
*/
HARP_CANCEL(&dcsp->sd_csus_rexmt_t);
scsp_free_msg(dcsp->sd_csus_rexmt_msg);
dcsp->sd_csus_rexmt_msg = (Scsp_msg *)0;
/*
* If the CRL isn't empty, send another CSUS
*/
if (dcsp->sd_crl) {
(void)scsp_send_csus(dcsp);
}
}
}
/*
* Send a CA message
*
* Arguments:
* dcsp pointer to DCS block for DCS
*
* Returns:
* 0 message sent OK
* else errno indicating reason for failure
*
*/
int
scsp_send_ca(dcsp)
Scsp_dcs *dcsp;
{
int rc;
Scsp_msg *ca_msg;
Scsp_ca *cap;
Scsp_server *ssp = dcsp->sd_server;
/*
* Get memory for a CA message
*/
ca_msg = calloc(1, sizeof(Scsp_msg));
if (ca_msg == NULL)
scsp_mem_err("scsp_send_ca: sizeof(Scsp_msg)");
cap = calloc(1, sizeof(Scsp_ca));
if (cap == NULL)
scsp_mem_err("scsp_send_ca: sizeof(Scsp_ca)");
/*
* Fill out constant fields
*/
ca_msg->sc_msg_type = SCSP_CA_MSG;
ca_msg->sc_ca = cap;
cap->ca_seq = dcsp->sd_ca_seq;
cap->ca_mcp.pid = ssp->ss_pid;
cap->ca_mcp.sgid = ssp->ss_sgid;
cap->ca_mcp.sid = ssp->ss_lsid;
cap->ca_mcp.rid = dcsp->sd_dcsid;
/*
* Fill out state-dependent fields
*/
switch(dcsp->sd_ca_state) {
case SCSP_CAFSM_NEG:
cap->ca_m = 1;
cap->ca_i = 1;
cap->ca_o = 1;
break;
case SCSP_CAFSM_MASTER:
cap->ca_m = 1;
cap->ca_i = 0;
scsp_ca_csas_setup(dcsp, cap);
cap->ca_o = dcsp->sd_ca_csas != (Scsp_cse *)0;
break;
case SCSP_CAFSM_SLAVE:
cap->ca_m = 0;
cap->ca_i = 0;
scsp_ca_csas_setup(dcsp, cap);
cap->ca_o = dcsp->sd_ca_csas != (Scsp_cse *)0;
break;
default:
scsp_log(LOG_ERR, "Invalid state in scsp_send_ca");
abort();
}
/*
* Send the CA message and save a pointer to it in case
* it needs to be retransmitted
*/
rc = scsp_send_msg(dcsp, ca_msg);
if (rc == 0) {
dcsp->sd_ca_rexmt_msg = ca_msg;
} else {
scsp_free_msg(ca_msg);
}
return(rc);
}
/*
* Send a CSU Solicit message
*
* Arguments:
* dcsp pointer to DCS block for DCS
*
* Returns:
* 0 message sent OK
* else errno indicating reason for failure
*
*/
int
scsp_send_csus(dcsp)
Scsp_dcs *dcsp;
{
int csas_len, len, mtu, rc;
Scsp_msg *csus_msg;
Scsp_csu_msg *csusp;
Scsp_csa *csasp, *next_csasp;
Scsp_server *ssp = dcsp->sd_server;
/*
* If we have a mesage saved for retransmission, use it.
* If not, get memory for a new one.
*/
if (dcsp->sd_csus_rexmt_msg) {
csus_msg = dcsp->sd_csus_rexmt_msg;
csusp = csus_msg->sc_csu_msg;
} else {
/*
* Get memory for a CSUS message
*/
csus_msg = calloc(1, sizeof(Scsp_msg));
if (csus_msg == NULL)
scsp_mem_err("scsp_send_csus: sizeof(Scsp_msg)");
csusp = calloc(1, sizeof(Scsp_csu_msg));
if (csusp == NULL)
scsp_mem_err("scsp_send_csus: sizeof(Scsp_csu_msg)");
/*
* Fill out constant fields
*/
csus_msg->sc_msg_type = SCSP_CSUS_MSG;
csus_msg->sc_csu_msg = csusp;
csusp->csu_mcp.pid = ssp->ss_pid;
csusp->csu_mcp.sgid = ssp->ss_sgid;
csusp->csu_mcp.sid = ssp->ss_lsid;
csusp->csu_mcp.rid = dcsp->sd_dcsid;
}
/*
* Move CSAS records from CRL into message
*/
mtu = dcsp->sd_server->ss_mtu;
csas_len = sizeof(struct scsp_ncsa) + ssp->ss_id_len +
ssp->ss_ckey_len;
len = sizeof(struct scsp_nhdr) + sizeof(struct scsp_nmcp) +
2 * ssp->ss_id_len +
csas_len * (csusp->csu_mcp.rec_cnt + 1);
for (csasp = dcsp->sd_crl;
csasp && ((len + csas_len) < mtu);
csasp = next_csasp, len += csas_len) {
next_csasp = csasp->next;
csusp->csu_mcp.rec_cnt++;
UNLINK(csasp, Scsp_csa, dcsp->sd_crl, next);
LINK2TAIL(csasp, Scsp_csa, csusp->csu_csa_rec, next);
csasp->hops = 1;
}
/*
* Send the CSUS message and save a pointer to it in case
* it needs to be retransmitted
*/
rc = scsp_send_msg(dcsp, csus_msg);
if (rc == 0) {
/*
* Success--Save a pointer to the message and
* start the CSUS retransmit timer
*/
dcsp->sd_csus_rexmt_msg = csus_msg;
HARP_TIMER(&dcsp->sd_csus_rexmt_t,
dcsp->sd_csus_rexmt_int,
scsp_csus_retran_timeout);
} else {
/*
* Error--free the CSUS message
*/
scsp_free_msg(csus_msg);
}
return(rc);
}
/*
* Send a CSU Request message
*
* Arguments:
* dcsp pointer to DCS block for DCS
* csap pointer to CSAs to include
*
* Returns:
* 0 message sent OK
* else errno indicating reason for failure
*
*/
int
scsp_send_csu_req(dcsp, csap)
Scsp_dcs *dcsp;
Scsp_csa *csap;
{
int rc;
Scsp_server *ssp = dcsp->sd_server;
Scsp_csa *cnt_csap;
Scsp_msg *csu_msg;
Scsp_csu_msg *csup;
Scsp_csu_rexmt *rxp;
/*
* Return if CSA list is empty
*/
if (!csap)
return(0);
/*
* Get memory for a CSU Req message
*/
csu_msg = calloc(1, sizeof(Scsp_msg));
if (csu_msg == NULL)
scsp_mem_err("scsp_send_csu_req: sizeof(Scsp_msg)");
csup = calloc(1, sizeof(Scsp_csu_msg));
if (csup == NULL)
scsp_mem_err("scsp_send_csu_req: sizeof(Scsp_csu_msg)");
/*
* Get memory for a CSU Req retransmission queue entry
*/
rxp = calloc(1, sizeof(Scsp_csu_rexmt));
if (rxp == NULL)
scsp_mem_err("scsp_send_csu_req: sizeof(Scsp_csu_rexmt)");
/*
* Fill out constant fields
*/
csu_msg->sc_msg_type = SCSP_CSU_REQ_MSG;
csu_msg->sc_csu_msg = csup;
csup->csu_mcp.pid = ssp->ss_pid;
csup->csu_mcp.sgid = ssp->ss_sgid;
csup->csu_mcp.sid = ssp->ss_lsid;
csup->csu_mcp.rid = dcsp->sd_dcsid;
/*
* Put the CSA list into the message
*/
csup->csu_csa_rec = csap;
for (cnt_csap = csap; cnt_csap; cnt_csap = cnt_csap->next) {
csup->csu_mcp.rec_cnt++;
}
/*
* Send the CSU Request
*/
rc = scsp_send_msg(dcsp, csu_msg);
if (rc) {
scsp_free_msg(csu_msg);
return(rc);
}
free(csu_msg);
free(csup);
/*
* Save the CSA entries on the CSU Request retransmission
* queue and start the retransmission timer
*/
rxp->sr_dcs = dcsp;
rxp->sr_csa = csap;
HARP_TIMER(&rxp->sr_t, dcsp->sd_csu_rexmt_int,
scsp_csu_req_retran_timeout);
LINK2TAIL(rxp, Scsp_csu_rexmt, dcsp->sd_csu_rexmt, sr_next);
return(0);
}
/*
* Send a CSU Reply message
*
* Arguments:
* dcsp pointer to DCS block for DCS
* csap pointer to CSAs to include
*
* Returns:
* 0 message sent OK
* errno reason for failure
*
*/
int
scsp_send_csu_reply(dcsp, csap)
Scsp_dcs *dcsp;
Scsp_csa *csap;
{
int rc;
Scsp_server *ssp = dcsp->sd_server;
Scsp_csa *csap1;
Scsp_msg *csu_msg;
Scsp_csu_msg *csup;
/*
* Return if CSA list is empty
*/
if (!csap)
return(0);
/*
* Get memory for a CSU Reply message
*/
csu_msg = calloc(1, sizeof(Scsp_msg));
if (csu_msg == NULL)
scsp_mem_err("scsp_send_csu_reply: sizeof(Scsp_msg)");
csup = calloc(1, sizeof(Scsp_csu_msg));
if (csup == NULL)
scsp_mem_err("scsp_send_csu_reply: sizeof(Scsp_csu_msg)");
/*
* Fill out constant fields
*/
csu_msg->sc_msg_type = SCSP_CSU_REPLY_MSG;
csu_msg->sc_csu_msg = csup;
csup->csu_mcp.pid = ssp->ss_pid;
csup->csu_mcp.sgid = ssp->ss_sgid;
csup->csu_mcp.sid = ssp->ss_lsid;
csup->csu_mcp.rid = dcsp->sd_dcsid;
/*
* Put the CSA list into the message. Convert the CSAs into
* CSASs by freeing the protocol-specific portion.
*/
csup->csu_csa_rec = csap;
for (csap1 = csap; csap1; csap1 = csap1->next) {
switch(dcsp->sd_server->ss_pid) {
/*
* We currently only support ATMARP
*/
case SCSP_PROTO_ATMARP:
if (csap1->atmarp_data) {
free(csap1->atmarp_data);
csap1->atmarp_data =
(Scsp_atmarp_csa *)0;
}
break;
}
csup->csu_mcp.rec_cnt++;
}
/*
* Send the CSU Reply
*/
rc = scsp_send_msg(dcsp, csu_msg);
scsp_free_msg(csu_msg);
return(rc);
}
/*
* Send a Hello message
*
* Arguments:
* dcsp pointer to DCS control block
*
* Returns:
* 0 success
* errno error encountered
*
*/
int
scsp_send_hello(dcsp)
Scsp_dcs *dcsp;
{
int rc;
Scsp_msg *hello;
Scsp_hello *hp;
/*
* Get memory for a Hello message
*/
hello = calloc(1, sizeof(Scsp_msg));
if (hello == NULL)
scsp_mem_err("scsp_send_hello: sizeof(Scsp_msg)");
hp = calloc(1, sizeof(Scsp_hello));
if (hp == NULL)
scsp_mem_err("scsp_send_hello: sizeof(Scsp_hello)");
/*
* Set up the Hello message
*/
hello->sc_msg_type = SCSP_HELLO_MSG;
hello->sc_hello = hp;
hp->hello_int = SCSP_HELLO_Interval;
hp->dead_factor = SCSP_HELLO_DF;
hp->family_id = dcsp->sd_server->ss_fid;
hp->hello_mcp.pid = dcsp->sd_server->ss_pid;
hp->hello_mcp.sgid = dcsp->sd_server->ss_sgid;
hp->hello_mcp.flags = 0;
hp->hello_mcp.rec_cnt = 0;
hp->hello_mcp.sid = dcsp->sd_server->ss_lsid;
hp->hello_mcp.rid = dcsp->sd_dcsid;
/*
* Send and free the message
*/
rc = scsp_send_msg(dcsp, hello);
scsp_free_msg(hello);
return(rc);
}