mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-24 11:29:10 +00:00
627 lines
13 KiB
C
627 lines
13 KiB
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.
|
|
*
|
|
* @(#) $FreeBSD$
|
|
*
|
|
*/
|
|
|
|
|
|
/*
|
|
* Server Cache Synchronization Protocol (SCSP) Support
|
|
* ----------------------------------------------------
|
|
*
|
|
* Interface to client server protocol
|
|
*
|
|
*/
|
|
|
|
#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 <unistd.h>
|
|
|
|
#include "scsp_msg.h"
|
|
#include "scsp_if.h"
|
|
#include "scsp_var.h"
|
|
|
|
#ifndef lint
|
|
__RCSID("@(#) $FreeBSD$");
|
|
#endif
|
|
|
|
|
|
/*
|
|
* SCSP client server interface FSM actions
|
|
*/
|
|
#define SCSP_CIFSM_ACTION_CNT 11
|
|
int scsp_client_act_00(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_01(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_02(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_03(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_04(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_05(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_06(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_07(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_08(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_09(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
int scsp_client_act_10(Scsp_dcs *, Scsp_msg *, Scsp_if_msg *);
|
|
|
|
static int (*scsp_action_vector[SCSP_CIFSM_ACTION_CNT])() = {
|
|
scsp_client_act_00,
|
|
scsp_client_act_01,
|
|
scsp_client_act_02,
|
|
scsp_client_act_03,
|
|
scsp_client_act_04,
|
|
scsp_client_act_05,
|
|
scsp_client_act_06,
|
|
scsp_client_act_07,
|
|
scsp_client_act_08,
|
|
scsp_client_act_09,
|
|
scsp_client_act_10
|
|
};
|
|
|
|
|
|
/*
|
|
* Client server interface FSM state table
|
|
*/
|
|
static int client_state_table[SCSP_CIFSM_EVENT_CNT][SCSP_CIFSM_STATE_CNT] = {
|
|
/* 0 1 2 3 */
|
|
{ 1, 3, 3, 3 }, /* 0 */
|
|
{ 2, 5, 5, 5 }, /* 1 */
|
|
{ 0, 4, 0, 0 }, /* 2 */
|
|
{ 0, 6, 6, 1 }, /* 3 */
|
|
{ 1, 0, 7, 7 }, /* 4 */
|
|
{ 7, 7, 7, 7 }, /* 5 */
|
|
{ 1, 1, 8, 8 }, /* 6 */
|
|
{ 0, 0, 10, 10 }, /* 7 */
|
|
{ 0, 0, 1, 1 }, /* 8 */
|
|
{ 0, 0, 9, 9 } /* 9 */
|
|
};
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine
|
|
*
|
|
* Arguments:
|
|
* ssp pointer to server control block
|
|
* event the event which has occurred
|
|
* msg pointer to message from DCS, if there is one
|
|
* cmsg pointer to message from server, if there is one
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* errno error encountered
|
|
*
|
|
*/
|
|
int
|
|
scsp_cfsm(dcsp, event, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
int event;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
int action, rc, state;
|
|
|
|
/*
|
|
* Select an action from the state table
|
|
*/
|
|
state = dcsp->sd_client_state;
|
|
action = client_state_table[event][state];
|
|
if (scsp_trace_mode & SCSP_TRACE_CFSM) {
|
|
scsp_trace("Server I/F FSM: state=%d, event=%d, action=%d\n",
|
|
state, event, action);
|
|
}
|
|
if (action >= SCSP_CIFSM_ACTION_CNT || action <= 0) {
|
|
scsp_log(LOG_ERR, "Server I/F FSM--invalid action %d; state=%d, event=%d",
|
|
action, dcsp->sd_client_state, event);
|
|
exit(1);
|
|
}
|
|
|
|
/*
|
|
* Perform the selected action
|
|
*/
|
|
rc = scsp_action_vector[action](dcsp, msg, cmsg);
|
|
|
|
return(rc);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 0
|
|
* Unexpected action -- log an error message
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS (ignored)
|
|
* cmsg pointer to message from server (ignored)
|
|
*
|
|
* Returns:
|
|
* EOPNOTSUPP always returns EOPNOTSUPP
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_00(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
scsp_log(LOG_ERR, "Server I/F FSM error--unexpected action, state=%d",
|
|
dcsp->sd_client_state);
|
|
return(EOPNOTSUPP);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 1
|
|
*
|
|
* Ignore an event
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 always returns 0
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_01(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 2
|
|
*
|
|
* CA FSM went to Cache Summarize state--go to Summarize
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_02(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
/*
|
|
* Set the new state
|
|
*/
|
|
dcsp->sd_client_state = SCSP_CIFSM_SUM;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 3
|
|
*
|
|
* CA FSM went down--clean up and go to Null
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_03(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
/*
|
|
* Set the new state
|
|
*/
|
|
dcsp->sd_client_state = SCSP_CIFSM_NULL;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 4
|
|
*
|
|
* CA FSM went to Update Cache state--go to Update state
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_04(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
/*
|
|
* Set the new state
|
|
*/
|
|
dcsp->sd_client_state = SCSP_CIFSM_UPD;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 5
|
|
*
|
|
* The CA FSM went to Cache Summarize state from Summarize,
|
|
* Update, or Aligned, implying that the CA FSM went down and came
|
|
* back up--copy the server's cache to the DCSs CSAS list and go to
|
|
* Summarize state
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_05(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
int i;
|
|
Scsp_cse *csep, *ncsep;
|
|
|
|
/*
|
|
* Copy the cache summmary to the CSAS list
|
|
*/
|
|
for (i = 0; i < SCSP_HASHSZ; i++) {
|
|
for (csep = dcsp->sd_server->ss_cache[i]; csep;
|
|
csep = csep->sc_next) {
|
|
ncsep = scsp_dup_cse(csep);
|
|
LINK2TAIL(ncsep, Scsp_cse, dcsp->sd_ca_csas,
|
|
sc_next);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Set the new state
|
|
*/
|
|
dcsp->sd_client_state = SCSP_CIFSM_SUM;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 6
|
|
*
|
|
* CA FSM went to Aligned state--go to Aligned
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_06(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
/*
|
|
* Set the new state
|
|
*/
|
|
dcsp->sd_client_state = SCSP_CIFSM_ALIGN;
|
|
|
|
return(0);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 7
|
|
*
|
|
* We received a Solicit Rsp or Update Req from the server--pass it
|
|
* to the CA FSM
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_07(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
int rc;
|
|
Scsp_csa *csap;
|
|
Scsp_atmarp_csa *acp;
|
|
|
|
/*
|
|
* Allocate memory for a CSA record
|
|
*/
|
|
csap = calloc(1, sizeof(Scsp_csa));
|
|
if (csap == NULL)
|
|
scsp_mem_err("scsp_client_act_07: sizeof(Scsp_csa)");
|
|
acp = calloc(1, sizeof(Scsp_atmarp_csa));
|
|
if (acp == NULL)
|
|
scsp_mem_err("scsp_client_act_07: sizeof(Scsp_atmarp_csa)");
|
|
|
|
/*
|
|
* Build a CSA record from the server's message
|
|
*/
|
|
csap->hops = dcsp->sd_hops;
|
|
csap->null = (cmsg->si_atmarp.sa_state == SCSP_ASTATE_DEL) ||
|
|
(cmsg->si_type == SCSP_SOLICIT_RSP &&
|
|
cmsg->si_rc != SCSP_RSP_OK);
|
|
csap->seq = cmsg->si_atmarp.sa_seq;
|
|
csap->key = cmsg->si_atmarp.sa_key;
|
|
csap->oid = cmsg->si_atmarp.sa_oid;
|
|
csap->atmarp_data = acp;
|
|
acp->sa_state = cmsg->si_atmarp.sa_state;
|
|
acp->sa_sha = cmsg->si_atmarp.sa_cha;
|
|
acp->sa_ssa = cmsg->si_atmarp.sa_csa;
|
|
acp->sa_spa = cmsg->si_atmarp.sa_cpa;
|
|
acp->sa_tpa = cmsg->si_atmarp.sa_cpa;
|
|
|
|
/*
|
|
* Call the CA FSM
|
|
*/
|
|
rc = scsp_cafsm(dcsp, SCSP_CAFSM_CACHE_UPD, (void *)csap);
|
|
|
|
return(rc);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 8
|
|
*
|
|
* Update Rsp from server--pass the update to the CA FSM.
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_08(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
int rc;
|
|
|
|
/*
|
|
* Pass the response to the CA FSM
|
|
*/
|
|
switch (dcsp->sd_server->ss_pid) {
|
|
case SCSP_PROTO_ATMARP:
|
|
rc = scsp_cafsm(dcsp, SCSP_CAFSM_CACHE_RSP, cmsg);
|
|
break;
|
|
default:
|
|
rc = EPROTONOSUPPORT;
|
|
}
|
|
|
|
return(rc);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 9
|
|
*
|
|
* CSU Solicit from DCS--pass Solicit Ind to server
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_09(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
int rc, rrc = 0;
|
|
Scsp_csa *csap;
|
|
Scsp_if_msg *csip;
|
|
|
|
/*
|
|
* Get memory for a Solicit Ind
|
|
*/
|
|
csip = calloc(1, sizeof(Scsp_if_msg));
|
|
if (csip == NULL)
|
|
scsp_mem_err("scsp_client_act_09: sizeof(Scsp_if_msg)");
|
|
|
|
/*
|
|
* Loop through list of CSAs
|
|
*/
|
|
for (csap = msg->sc_csu_msg->csu_csa_rec; csap;
|
|
csap = csap->next) {
|
|
/*
|
|
* Fill out the Solicit Indication
|
|
*/
|
|
bzero(csip, sizeof(Scsp_if_msg));
|
|
csip->si_type = SCSP_SOLICIT_IND;
|
|
csip->si_proto = dcsp->sd_server->ss_pid;
|
|
csip->si_tok = (u_long)dcsp;
|
|
csip->si_len = sizeof(Scsp_if_msg_hdr) +
|
|
sizeof(Scsp_sum_msg);
|
|
csip->si_sum.ss_hops = csap->hops;
|
|
csip->si_sum.ss_null = csap->null;
|
|
csip->si_sum.ss_seq = csap->seq;
|
|
csip->si_sum.ss_key = csap->key;
|
|
csip->si_sum.ss_oid = csap->oid;
|
|
|
|
/*
|
|
* Send the Solicit Ind to the server
|
|
*/
|
|
rc = scsp_if_sock_write(dcsp->sd_server->ss_sock, csip);
|
|
if (rc) {
|
|
rrc = rc;
|
|
}
|
|
}
|
|
free(csip);
|
|
return(rrc);
|
|
}
|
|
|
|
|
|
/*
|
|
* SCSP client server interface finite state machine action 10
|
|
*
|
|
* CSU Request from DCS--pass it to the server as a Cache Update
|
|
* Indication
|
|
*
|
|
* Arguments:
|
|
* dcsp pointer to DCS control block
|
|
* msg pointer to message from DCS
|
|
* cmsg pointer to message from server
|
|
*
|
|
* Returns:
|
|
* 0 success
|
|
* else errno describing error
|
|
*
|
|
*/
|
|
int
|
|
scsp_client_act_10(dcsp, msg, cmsg)
|
|
Scsp_dcs *dcsp;
|
|
Scsp_msg *msg;
|
|
Scsp_if_msg *cmsg;
|
|
{
|
|
int rc, rrc = 0;
|
|
Scsp_csa *csap;
|
|
Scsp_atmarp_csa *acp;
|
|
Scsp_if_msg *cuip;
|
|
|
|
/*
|
|
* Get memory for a Cache Update Ind
|
|
*/
|
|
cuip = malloc(sizeof(Scsp_if_msg));
|
|
if (cuip == NULL)
|
|
scsp_mem_err("scsp_client_act_10: sizeof(Scsp_if_msg)");
|
|
|
|
/*
|
|
* Loop through CSAs in message
|
|
*/
|
|
for (csap = msg->sc_csu_msg->csu_csa_rec; csap;
|
|
csap = csap->next) {
|
|
acp = csap->atmarp_data;
|
|
if (!acp)
|
|
continue;
|
|
|
|
/*
|
|
* Fill out the Cache Update Ind
|
|
*/
|
|
bzero(cuip, sizeof(Scsp_if_msg));
|
|
cuip->si_type = SCSP_UPDATE_IND;
|
|
cuip->si_proto = dcsp->sd_server->ss_pid;
|
|
cuip->si_tok = (u_long)dcsp;
|
|
switch(dcsp->sd_server->ss_pid) {
|
|
case SCSP_PROTO_ATMARP:
|
|
cuip->si_len = sizeof(Scsp_if_msg_hdr) +
|
|
sizeof(Scsp_atmarp_msg);
|
|
cuip->si_atmarp.sa_state = acp->sa_state;
|
|
cuip->si_atmarp.sa_cpa = acp->sa_spa;
|
|
cuip->si_atmarp.sa_cha = acp->sa_sha;
|
|
cuip->si_atmarp.sa_csa = acp->sa_ssa;
|
|
cuip->si_atmarp.sa_key = csap->key;
|
|
cuip->si_atmarp.sa_oid = csap->oid;
|
|
cuip->si_atmarp.sa_seq = csap->seq;
|
|
break;
|
|
case SCSP_PROTO_NHRP:
|
|
/*
|
|
* Not implemented yet
|
|
*/
|
|
break;
|
|
}
|
|
|
|
/*
|
|
* Send the Cache Update Ind to the server
|
|
*/
|
|
rc = scsp_if_sock_write(dcsp->sd_server->ss_sock, cuip);
|
|
if (rc) {
|
|
rrc = rc;
|
|
}
|
|
}
|
|
free(cuip);
|
|
return(rrc);
|
|
}
|