static int scanInFdus(Sdr sdr, time_t currentTime)
{
CfdpDB *cfdpConstants;
Object entityElt;
OBJ_POINTER(Entity, entity);
Object elt;
Object nextElt;
Object fduObj;
OBJ_POINTER(InFdu, fdu);
CfdpHandler handler;
cfdpConstants = getCfdpConstants();
sdr_begin_xn(sdr);
for (entityElt = sdr_list_first(sdr, cfdpConstants->entities);
entityElt; entityElt = sdr_list_next(sdr, entityElt))
{
GET_OBJ_POINTER(sdr, Entity, entity, sdr_list_data(sdr,
entityElt));
for (elt = sdr_list_first(sdr, entity->inboundFdus); elt;
elt = nextElt)
{
nextElt = sdr_list_next(sdr, elt);
fduObj = sdr_list_data(sdr, elt);
GET_OBJ_POINTER(sdr, InFdu, fdu, fduObj);
if (fdu->eofReceived && fdu->checkTime < currentTime)
{
sdr_stage(sdr, NULL, fduObj, 0);
fdu->checkTimeouts++;
fdu->checkTime
+= cfdpConstants->checkTimerPeriod;
sdr_write(sdr, fduObj, (char *) fdu,
sizeof(InFdu));
}
if (fdu->checkTimeouts
> cfdpConstants->checkTimeoutLimit)
{
if (handleFault(&(fdu->transactionId),
CfdpCheckLimitReached, &handler) < 0)
{
sdr_cancel_xn(sdr);
putErrmsg("Can't handle check limit \
reached.", NULL);
return -1;
}
}
}
}
static int reforwardStrandedBundles()
{
Sdr sdr = getIonsdr();
BpDB *bpConstants = getBpConstants();
Object elt;
Object nextElt;
CHKERR(sdr_begin_xn(sdr));
for (elt = sdr_list_first(sdr, bpConstants->limboQueue); elt;
elt = nextElt)
{
nextElt = sdr_list_next(sdr, elt);
if (releaseFromLimbo(elt, 0) < 0)
{
putErrmsg("Failed releasing bundle from limbo.", NULL);
sdr_cancel_xn(sdr);
return -1;
}
}
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("brss failed limbo release on client connect.", NULL);
return -1;
}
return 0;
}
Object findSdrAcsSignal(Object acsSignals, BpCtReason reasonCode,
unsigned char succeeded, Object *signalAddrPtr)
{
SdrAcsSignal signal;
Object acsSignalLElt;
Object acsSignalAddr;
signal.reasonCode = reasonCode;
signal.succeeded = succeeded;
ASSERT_ACSSDR_XN;
/* Get the first element of the list. */
acsSignalLElt = sdr_list_first(acsSdr, acsSignals);
if (acsSignalLElt == 0)
{
ACSLOG_INFO("Couldn't find ACS signal (%s, %d)",
succeeded ? "success" : "fail", reasonCode);
return 0;
}
acsSignalLElt = sdr_list_search(acsSdr, acsSignalLElt, 0, cmpSdrAcsSignals, &signal);
if(acsSignalLElt == 0)
{
ACSLOG_INFO("Couldn't find ACS signal (%s, %d)",
succeeded ? "success" : "fail", reasonCode);
return 0;
}
acsSignalAddr = sdr_list_data(acsSdr, acsSignalLElt);
if(signalAddrPtr) *signalAddrPtr = acsSignalAddr;
return acsSignalLElt;
}
int db_forget(Object *primitiveObj, Object *descObj, Object list)
{
Sdr sdr = getIonsdr();
Object elt;
if((primitiveObj == NULL) || (descObj == NULL) || (list == 0))
{
AMP_DEBUG_ERR("db_forget","Bad Params.",NULL);
return -1;
}
CHKERR(sdr_begin_xn(sdr));
if(*primitiveObj != 0)
{
sdr_free(sdr, *primitiveObj);
}
if(*descObj != 0)
{
elt = sdr_list_first(sdr, list);
while(elt)
{
if(sdr_list_data(sdr, elt) == *descObj)
{
sdr_list_delete(sdr, elt, NULL, NULL);
sdr_free(sdr, *descObj);
elt = 0;
}
else
{
elt = sdr_list_next(sdr, elt);
}
}
}
sdr_end_xn(sdr);
/* Forget now invalid SDR pointers. */
*descObj = 0;
*primitiveObj = 0;
return 1;
}
Object findCustodianByEid(Object custodians, const char *eid)
{
Object pendingCustLElt;
acsSdr = getAcssdr();
/* Get the first element of the list. */
pendingCustLElt = sdr_list_first(acsSdr, custodians);
if (pendingCustLElt == 0)
{
return 0;
}
pendingCustLElt = sdr_list_search(acsSdr, pendingCustLElt, 0, cmpSdrAcsPendingCust, (void *)(eid));
if(pendingCustLElt == 0)
{
return 0;
}
return sdr_list_data(acsSdr, pendingCustLElt);
}
void listCustodianInfo(void (*printer)(const char *))
{
Object custodianLElt;
Object custodianAddr;
SdrAcsPendingCust custodian;
char buffer[1024];
CHKVOID(sdr_begin_xn(acsSdr));
for(custodianLElt = sdr_list_first(acsSdr, acsConstants->pendingCusts);
custodianLElt;
custodianLElt = sdr_list_next(acsSdr, custodianLElt))
{
custodianAddr = sdr_list_data(acsSdr, custodianLElt);
sdr_peek(acsSdr, custodian, custodianAddr);
snprintf(buffer, sizeof(buffer), "%.*s\tDelay: %lu Size: %lu",
MAX_EID_LEN, custodian.eid,
custodian.acsDelay,
custodian.acsSize);
printer(buffer);
}
oK(sdr_end_xn(acsSdr));
}
static Object locateRule(Dtn2Plan *plan, char *demux, Object *nextRule)
{
Sdr sdr = getIonsdr();
Object elt;
OBJ_POINTER(Dtn2Rule, rule);
char nameBuffer[SDRSTRING_BUFSZ];
int result;
/* This function locates the Dtn2Rule identified by the
* specified demux token, for the specified destination
* endpoint, if any; must be an exact match. If
* none, notes the location within the rules list at
* which such a rule should be inserted. */
if (nextRule) *nextRule = 0; /* Default. */
for (elt = sdr_list_first(sdr, plan->rules); elt;
elt = sdr_list_next(sdr, elt))
{
GET_OBJ_POINTER(sdr, Dtn2Rule, rule, sdr_list_data(sdr, elt));
sdr_string_read(sdr, nameBuffer, rule->demux);
result = strcmp(nameBuffer, demux);
if (result < 0)
{
continue;
}
if (result > 0)
{
if (nextRule) *nextRule = elt;
break; /* Same as end of list. */
}
return elt;
}
return 0;
}
void bp_untrack(Object bundleObj, Object trackingElt)
{
Sdr sdr = getIonsdr();
OBJ_POINTER(Bundle, bundle);
Object elt;
CHKVOID(bundleObj && trackingElt);
sdr_begin_xn(sdr);
GET_OBJ_POINTER(sdr, Bundle, bundle, bundleObj);
if (bundle->trackingElts == 0)
{
sdr_exit_xn(sdr);
return;
}
for (elt = sdr_list_first(sdr, bundle->trackingElts); elt;
elt = sdr_list_next(sdr, elt))
{
if (sdr_list_data(sdr, elt) == trackingElt)
{
break;
}
}
if (elt == 0) /* Not found. */
{
sdr_exit_xn(sdr);
return;
}
sdr_list_delete(sdr, elt, NULL, NULL);
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("Failed removing bundle tracking elt.", NULL);
}
}
static Object locatePlan(char *nodeName, Object *nextPlan)
{
Sdr sdr = getIonsdr();
Object elt;
OBJ_POINTER(Dtn2Plan, plan);
char nameBuffer[SDRSTRING_BUFSZ];
int result;
/* This function locates the Dtn2Plan identified by the
* specified node name, if any; must be an exact match.
* If none, notes the location within the plans list at
* which such a plan should be inserted. */
if (nextPlan) *nextPlan = 0; /* Default. */
for (elt = sdr_list_first(sdr, (_dtn2Constants())->plans); elt;
elt = sdr_list_next(sdr, elt))
{
GET_OBJ_POINTER(sdr, Dtn2Plan, plan, sdr_list_data(sdr, elt));
sdr_string_read(sdr, nameBuffer, plan->nodeName);
result = strcmp(nameBuffer, nodeName);
if (result < 0)
{
continue;
}
if (result > 0)
{
if (nextPlan) *nextPlan = elt;
break; /* Same as end of list. */
}
return elt;
}
return 0;
}
static void executeList(int tokenCount, char **tokens)
{
Sdr sdr = getIonsdr();
ImcDB imcdb;
Object elt;
OBJ_POINTER(NodeId, node);
if (tokenCount != 1)
{
SYNTAX_ERROR;
return;
}
CHKVOID(sdr_begin_xn(sdr));
sdr_read(getIonsdr(), (char *) &imcdb, getImcDbObject(), sizeof(ImcDB));
for (elt = sdr_list_first(sdr, imcdb.kin); elt;
elt = sdr_list_next(sdr, elt))
{
GET_OBJ_POINTER(sdr, NodeId, node, sdr_list_data(sdr, elt));
printKin(node->nbr, imcdb.parent);
}
sdr_exit_xn(sdr);
}
static int enqueueBundle(Bundle *bundle, Object bundleObj)
{
Sdr sdr = getIonsdr();
Object elt;
char eidString[SDRSTRING_BUFSZ];
MetaEid metaEid;
VScheme *vscheme;
PsmAddress vschemeElt;
char nodeName[SDRSTRING_BUFSZ];
char demux[SDRSTRING_BUFSZ];
int result;
FwdDirective directive;
elt = sdr_list_first(sdr, bundle->stations);
if (elt == 0)
{
putErrmsg("Forwarding error; stations stack is empty.", NULL);
return -1;
}
sdr_string_read(sdr, eidString, sdr_list_data(sdr, elt));
if (parseEidString(eidString, &metaEid, &vscheme, &vschemeElt) == 0)
{
putErrmsg("Can't parse node EID string.", eidString);
return bpAbandon(bundleObj, bundle, BP_REASON_NO_ROUTE);
}
if (strcmp(vscheme->name, "dtn") != 0)
{
putErrmsg("Forwarding error; EID scheme wrong for dtn2fw.",
vscheme->name);
return -1;
}
result = parseDtn2Nss(metaEid.nss, nodeName, demux);
restoreEidString(&metaEid);
if (result == 0)
{
putErrmsg("Invalid nss in EID string, cannot forward.",
eidString);
return bpAbandon(bundleObj, bundle, BP_REASON_NO_ROUTE);
}
if (dtn2_lookupDirective(nodeName, demux, bundle, &directive) == 0)
{
putErrmsg("Can't find forwarding directive for EID.",
eidString);
return bpAbandon(bundleObj, bundle, BP_REASON_NO_ROUTE);
}
if (directive.action == xmit)
{
if (bpEnqueue(&directive, bundle, bundleObj, eidString) < 0)
{
putErrmsg("Can't enqueue bundle.", NULL);
return -1;
}
if (bundle->ductXmitElt)
{
/* Enqueued. */
return bpAccept(bundleObj, bundle);
}
else
{
return bpAbandon(bundleObj, bundle, BP_REASON_NO_ROUTE);
}
}
/* Can't transmit to indicated next node directly, must
* forward through some other node. */
sdr_write(sdr, bundleObj, (char *) &bundle, sizeof(Bundle));
sdr_string_read(sdr, eidString, directive.eid);
return forwardBundle(bundleObj, bundle, eidString);
}
int dtn2_lookupDirective(char *nodeName, char *demux, Bundle *bundle,
FwdDirective *dirbuf)
{
Sdr sdr = getIonsdr();
int protClassReqd;
Object elt;
Object addr;
OBJ_POINTER(Dtn2Plan, plan);
int stringLen;
char stringBuffer[SDRSTRING_BUFSZ];
int result;
int last;
OBJ_POINTER(Dtn2Rule, rule);
/* This function determines the relevant FwdDirective for
* the specified eid, if any. Wild card match is okay. */
CHKERR(ionLocked());
CHKERR(nodeName && demux && dirbuf);
/* Determine constraints on directive usability. */
protClassReqd = bundle->extendedCOS.flags & BP_PROTOCOL_BOTH;
if (protClassReqd == 0) /* Don't care. */
{
protClassReqd = -1; /* Matches any. */
}
else if (protClassReqd == 10) /* Need BSS. */
{
protClassReqd = BP_PROTOCOL_STREAMING;
}
/* Find best matching plan. Universal wild-card match,
* if any, is at the end of the list, so there's no way
* to terminate the search early. */
for (elt = sdr_list_first(sdr, (_dtn2Constants())->plans); elt;
elt = sdr_list_next(sdr, elt))
{
addr = sdr_list_data(sdr, elt);
GET_OBJ_POINTER(sdr, Dtn2Plan, plan, addr);
stringLen = sdr_string_read(sdr, stringBuffer, plan->nodeName);
result = strcmp(stringBuffer, nodeName);
if (result < 0)
{
continue;
}
if (result == 0) /* Exact match. */
{
break; /* Stop searching. */
}
/* Node name in plan is greater than node name,
* but it might still be a wild-card match. */
last = stringLen - 1;
if (stringBuffer[last] == '~' /* "all nodes" */
&& strncmp(stringBuffer, nodeName, stringLen - 1) == 0)
{
break; /* Stop searching. */
}
}
if (elt == 0)
{
return 0; /* No plan found. */
}
/* Find best matching rule. */
for (elt = sdr_list_first(sdr, plan->rules); elt;
elt = sdr_list_next(sdr, elt))
{
addr = sdr_list_data(sdr, elt);
GET_OBJ_POINTER(sdr, Dtn2Rule, rule, addr);
if ((rule->directive.protocolClass & protClassReqd) == 0)
{
continue; /* Can't use this rule. */
}
stringLen = sdr_string_read(sdr, stringBuffer, rule->demux);
result = strcmp(stringBuffer, demux);
if (result < 0)
{
continue;
}
if (result == 0) /* Exact match. */
{
break; /* Stop searching. */
}
/* Demux in rule is greater than demux, but it
* might still be a wild-card match. */
last = stringLen - 1;
if (stringBuffer[last] == '~' /* "all demuxes" */
&& strncmp(stringBuffer, demux, stringLen - 1) == 0)
{
break; /* Stop searching. */
}
}
if (elt == 0) /* End of list. */
{
if ((plan->defaultDirective.protocolClass & protClassReqd) == 0)
{
return 0; /* Matching plan unusable. */
}
memcpy((char *) dirbuf, (char *) &plan->defaultDirective,
sizeof(FwdDirective));
return 1;
}
/* Found a matching rule. */
memcpy((char *) dirbuf, (char *) &rule->directive,
sizeof(FwdDirective));
return 1;
}
int bp_receive(BpSAP sap, BpDelivery *dlvBuffer, int timeoutSeconds)
{
Sdr sdr = getIonsdr();
VEndpoint *vpoint;
OBJ_POINTER(Endpoint, endpoint);
Object dlvElt;
Object bundleAddr;
Bundle bundle;
TimerParms timerParms;
pthread_t timerThread;
int result;
char *dictionary;
CHKERR(sap && dlvBuffer);
if (timeoutSeconds < BP_BLOCKING)
{
putErrmsg("Illegal timeout interval.", itoa(timeoutSeconds));
return -1;
}
vpoint = sap->vpoint;
sdr_begin_xn(sdr);
if (vpoint->appPid != sm_TaskIdSelf())
{
sdr_exit_xn(sdr);
putErrmsg("Can't receive: not owner of endpoint.",
itoa(vpoint->appPid));
return -1;
}
if (sm_SemEnded(vpoint->semaphore))
{
sdr_exit_xn(sdr);
writeMemo("[?] Endpoint has been stopped.");
/* End task, but without error. */
return -1;
}
/* Get oldest bundle in delivery queue, if any; wait
* for one if necessary. */
GET_OBJ_POINTER(sdr, Endpoint, endpoint, sdr_list_data(sdr,
vpoint->endpointElt));
dlvElt = sdr_list_first(sdr, endpoint->deliveryQueue);
if (dlvElt == 0)
{
sdr_exit_xn(sdr);
if (timeoutSeconds == BP_POLL)
{
dlvBuffer->result = BpReceptionTimedOut;
return 0;
}
/* Wait for semaphore to be given, either by the
* deliverBundle() function or by timer thread. */
if (timeoutSeconds == BP_BLOCKING)
{
timerParms.interval = -1;
}
else /* This is a receive() with a deadline. */
{
timerParms.interval = timeoutSeconds;
timerParms.semaphore = vpoint->semaphore;
if (pthread_create(&timerThread, NULL, timerMain,
&timerParms) < 0)
{
putSysErrmsg("Can't enable interval timer",
NULL);
return -1;
}
}
/* Take endpoint semaphore. */
if (sm_SemTake(vpoint->semaphore) < 0)
{
putErrmsg("Can't take endpoint semaphore.", NULL);
return -1;
}
if (sm_SemEnded(vpoint->semaphore))
{
writeMemo("[i] Endpoint has been stopped.");
/* End task, but without error. */
return -1;
}
/* Have taken the semaphore, one way or another. */
sdr_begin_xn(sdr);
dlvElt = sdr_list_first(sdr, endpoint->deliveryQueue);
if (dlvElt == 0) /* Still nothing. */
{
/* Either sm_SemTake() was interrupted
* or else timer thread gave semaphore. */
sdr_exit_xn(sdr);
if (timerParms.interval == 0)
{
/* Timer expired. */
dlvBuffer->result = BpReceptionTimedOut;
pthread_join(timerThread, NULL);
}
else /* Interrupted. */
{
dlvBuffer->result = BpReceptionInterrupted;
if (timerParms.interval != -1)
{
pthread_cancel(timerThread);
pthread_join(timerThread, NULL);
}
}
return 0;
}
else /* Bundle was delivered. */
{
if (timerParms.interval != -1)
{
pthread_cancel(timerThread);
pthread_join(timerThread, NULL);
}
}
}
/* At this point, we have got a dlvElt and are in an SDR
* transaction. */
bundleAddr = sdr_list_data(sdr, dlvElt);
sdr_stage(sdr, (char *) &bundle, bundleAddr, sizeof(Bundle));
dictionary = retrieveDictionary(&bundle);
if (dictionary == (char *) &bundle)
{
sdr_cancel_xn(sdr);
putErrmsg("Can't retrieve dictionary.", NULL);
return -1;
}
/* Now fill in the data indication structure. */
dlvBuffer->result = BpPayloadPresent;
if (printEid(&bundle.id.source, dictionary,
&dlvBuffer->bundleSourceEid) < 0)
{
sdr_cancel_xn(sdr);
putErrmsg("Can't print source EID.", NULL);
return -1;
}
dlvBuffer->bundleCreationTime.seconds = bundle.id.creationTime.seconds;
dlvBuffer->bundleCreationTime.count = bundle.id.creationTime.count;
dlvBuffer->adminRecord = bundle.bundleProcFlags & BDL_IS_ADMIN;
dlvBuffer->adu = zco_add_reference(sdr, bundle.payload.content);
dlvBuffer->ackRequested = bundle.bundleProcFlags & BDL_APP_ACK_REQUEST;
/* Now before returning we send delivery status report
* if it is requested. */
if (SRR_FLAGS(bundle.bundleProcFlags) & BP_DELIVERED_RPT)
{
bundle.statusRpt.flags |= BP_DELIVERED_RPT;
getCurrentDtnTime(&bundle.statusRpt.deliveryTime);
}
if (bundle.statusRpt.flags)
{
result = sendStatusRpt(&bundle, dictionary);
if (result < 0)
{
sdr_cancel_xn(sdr);
putErrmsg("Can't send status report.", NULL);
return -1;
}
}
/* Finally delete the delivery list element and, if
* possible, destroy the bundle itself. */
if (dictionary)
{
MRELEASE(dictionary);
}
sdr_list_delete(sdr, dlvElt, (SdrListDeleteFn) NULL, NULL);
bundle.dlvQueueElt = 0;
sdr_write(sdr, bundleAddr, (char *) &bundle, sizeof(Bundle));
if (bpDestroyBundle(bundleAddr, 0) < 0)
{
sdr_cancel_xn(sdr);
putErrmsg("Can't destroy bundle.", NULL);
return -1;
}
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("Failure in bundle reception.", NULL);
return -1;
}
return 0;
}
static int dispatchEvents(Sdr sdr, Object events, time_t currentTime)
{
Object elt;
Object eventObj;
OBJ_POINTER(BpEvent, event);
int result;
while (1)
{
sdr_begin_xn(sdr);
CHKERR(ionLocked()); /* In case of killm. */
elt = sdr_list_first(sdr, events);
if (elt == 0) /* No more events to dispatch. */
{
sdr_exit_xn(sdr);
return 0;
}
eventObj = sdr_list_data(sdr, elt);
GET_OBJ_POINTER(sdr, BpEvent, event, eventObj);
if (event->time > currentTime)
{
/* This is the first future event. */
sdr_exit_xn(sdr);
return 0;
}
switch (event->type)
{
case expiredTTL:
result = bpDestroyBundle(event->ref, 1);
/* Note that bpDestroyBundle() always
* erases the bundle's timeline event,
* so we must NOT do so here. */
break; /* Out of switch. */
case xmitOverdue:
result = bpReforwardBundle(event->ref);
/* Note that bpReforwardBundle() always
* erases the bundle's xmitOverdue event,
* so we must NOT do so here. */
break; /* Out of switch. */
case ctDue:
result = bpReforwardBundle(event->ref);
/* Note that bpReforwardBundle() always
* erases the bundle's ctDue event, so
* we must NOT do so here. */
break; /* Out of switch. */
default: /* Spurious event; erase. */
sdr_free(sdr, eventObj);
sdr_list_delete(sdr, elt, NULL, NULL);
result = 0; /* Event is ignored. */
}
if (result != 0) /* Dispatching failed. */
{
sdr_cancel_xn(sdr);
putErrmsg("Failed handing BP event.", NULL);
return result;
}
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("Failed dispatching BP event.", NULL);
return -1;
}
}
}
static int enqueueBundle(Bundle *bundle, Object bundleObj)
{
Sdr sdr = getIonsdr();
Object elt;
char eidString[SDRSTRING_BUFSZ];
MetaEid metaEid;
VScheme *vscheme;
PsmAddress vschemeElt;
FwdDirective directive;
elt = sdr_list_first(sdr, bundle->stations);
if (elt == 0)
{
putErrmsg("Forwarding error; stations stack is empty.", NULL);
return -1;
}
sdr_string_read(sdr, eidString, sdr_list_data(sdr, elt));
if (parseEidString(eidString, &metaEid, &vscheme, &vschemeElt) == 0)
{
putErrmsg("Can't parse node EID string.", eidString);
return bpAbandon(bundleObj, bundle);
}
if (strcmp(vscheme->name, "ipn") != 0)
{
putErrmsg("Forwarding error; EID scheme is not 'ipn'.",
vscheme->name);
return -1;
}
if (cgr_forward(bundle, bundleObj, metaEid.nodeNbr,
(getIpnConstants())->plans) < 0)
{
putErrmsg("CGR failed.", NULL);
return -1;
}
/* If dynamic routing succeeded in enqueuing the bundle
* to a neighbor, accept the bundle and return. */
if (sdr_list_length(sdr, bundle->xmitRefs) > 0)
{
/* Enqueued. */
return bpAccept(bundle);
}
/* No luck using the contact graph to compute a route
* to the destination node. So see if destination node
* is a neighbor; if so, enqueue for direct transmission. */
if (enqueueToNeighbor(bundle, bundleObj, metaEid.nodeNbr,
metaEid.serviceNbr) < 0)
{
putErrmsg("Can't send bundle to neighbor.", NULL);
return -1;
}
if (sdr_list_length(sdr, bundle->xmitRefs) > 0)
{
/* Enqueued. */
return bpAccept(bundle);
}
/* Destination isn't a neighbor either. So look for the
* narrowest applicable static route (node range, i.e.,
* "group") and forward to the prescribed "via" endpoint
* for that group. */
if (ipn_lookupGroupDirective(metaEid.nodeNbr,
bundle->id.source.c.serviceNbr,
bundle->id.source.c.nodeNbr, &directive) == 0)
{
return bpAbandon(bundleObj, bundle);
}
/* Found directive; forward via the indicated endpoint. */
sdr_string_read(sdr, eidString, directive.eid);
return forwardBundle(bundleObj, bundle, eidString);
}
int dtn2fw(int a1, int a2, int a3, int a4, int a5,
int a6, int a7, int a8, int a9, int a10)
{
#else
int main(int argc, char *argv[])
{
#endif
int running = 1;
Sdr sdr;
VScheme *vscheme;
PsmAddress vschemeElt;
Scheme scheme;
Object elt;
Object bundleAddr;
Bundle bundle;
if (bpAttach() < 0)
{
putErrmsg("dtn2fw can't attach to BP.", NULL);
return 1;
}
if (dtn2Init(NULL) < 0)
{
putErrmsg("dtn2fw can't load routing database.", NULL);
return 1;
}
sdr = getIonsdr();
findScheme("dtn", &vscheme, &vschemeElt);
if (vschemeElt == 0)
{
putErrmsg("Scheme name for dtn2 is unknown.", "dtn");
return 1;
}
CHKZERO(sdr_begin_xn(sdr));
sdr_read(sdr, (char *) &scheme, sdr_list_data(sdr,
vscheme->schemeElt), sizeof(Scheme));
sdr_exit_xn(sdr);
oK(_dtn2fwSemaphore(&vscheme->semaphore));
isignal(SIGTERM, shutDown);
/* Main loop: wait until forwarding queue is non-empty,
* then drain it. */
writeMemo("[i] dtn2fw is running.");
while (running && !(sm_SemEnded(vscheme->semaphore)))
{
/* We wrap forwarding in an SDR transaction to
* prevent race condition with bpclock (which
* is destroying bundles as their TTLs expire). */
CHKZERO(sdr_begin_xn(sdr));
elt = sdr_list_first(sdr, scheme.forwardQueue);
if (elt == 0) /* Wait for forwarding notice. */
{
sdr_exit_xn(sdr);
if (sm_SemTake(vscheme->semaphore) < 0)
{
putErrmsg("Can't take forwarder semaphore.",
NULL);
running = 0;
}
continue;
}
bundleAddr = (Object) sdr_list_data(sdr, elt);
sdr_stage(sdr, (char *) &bundle, bundleAddr, sizeof(Bundle));
sdr_list_delete(sdr, elt, NULL, NULL);
bundle.fwdQueueElt = 0;
/* Must rewrite bundle to note removal of
* fwdQueueElt, in case the bundle is abandoned
* and bpDestroyBundle re-reads it from the
* database. */
sdr_write(sdr, bundleAddr, (char *) &bundle, sizeof(Bundle));
if (enqueueBundle(&bundle, bundleAddr) < 0)
{
sdr_cancel_xn(sdr);
putErrmsg("Can't enqueue bundle.", NULL);
running = 0; /* Terminate loop. */
continue;
}
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("Can't enqueue bundle.", NULL);
running = 0; /* Terminate loop. */
}
/* Make sure other tasks have a chance to run. */
sm_TaskYield();
}
writeErrmsgMemos();
writeMemo("[i] dtn2fw forwarder has ended.");
ionDetach();
return 0;
}
static int reforwardStrandedBundles(int nodeNbr)
{
Sdr sdr = getIonsdr();
BpDB *bpConstants = getBpConstants();
Object elt;
Object eventObj;
OBJ_POINTER(BpEvent, event);
OBJ_POINTER(Bundle, bundle);
sdr_begin_xn(sdr);
for (elt = sdr_list_first(sdr, bpConstants->timeline); elt;
elt = sdr_list_next(sdr, elt))
{
eventObj = sdr_list_data(sdr, elt);
GET_OBJ_POINTER(sdr, BpEvent, event, eventObj);
if (event->type != expiredTTL)
{
continue;
}
/* Have got a bundle that still exists. */
GET_OBJ_POINTER(sdr, Bundle, bundle, event->ref);
if (bundle->dlvQueueElt || bundle->fragmentElt
|| bundle->fwdQueueElt || bundle->overdueElt
|| bundle->ctDueElt || bundle->xmitsNeeded > 0)
{
/* No need to reforward. */
continue;
}
/* A stranded bundle, awaiting custody acceptance.
* Might be for a neighbor other than the one
* that just reconnected, but in that case the
* bundle will be reforwarded and requeued and
* go into the bit bucket again; no harm. Note,
* though, that this means that a BRS server
* would be a bad candidate for gateway into a
* space subnet: due to long OWLTs, there might
* be a lot of bundles sent via LTP that are
* awaiting custody acceptance, so reconnection
* of a BRS client might trigger retransmission
* of a lot of bundles on the space link in
* addition to the ones to be issued via brss. */
if (bpReforwardBundle(event->ref) < 0)
{
sdr_cancel_xn(sdr);
putErrmsg("brss reforward failed.", NULL);
return -1;
}
}
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("brss reforwarding failed.", NULL);
return -1;
}
return 0;
}
static int dispatchEvents(Sdr sdr, Object events, time_t currentTime)
{
Object elt;
Object eventObj;
LtpEvent event;
int result;
while (1)
{
sdr_begin_xn(sdr);
elt = sdr_list_first(sdr, events);
if (elt == 0) /* No more events to dispatch. */
{
sdr_exit_xn(sdr);
return 0;
}
eventObj = sdr_list_data(sdr, elt);
sdr_read(sdr, (char *) &event, eventObj, sizeof(LtpEvent));
if (event.scheduledTime > currentTime)
{
/* This is the first future event. */
sdr_exit_xn(sdr);
return 0;
}
sdr_free(sdr, eventObj);
sdr_list_delete(sdr, elt, NULL, NULL);
switch (event.type)
{
case LtpResendCheckpoint:
result = ltpResendCheckpoint(event.refNbr2,
event.refNbr3);
break; /* Out of switch. */
case LtpResendXmitCancel:
result = ltpResendXmitCancel(event.refNbr2);
break; /* Out of switch. */
case LtpResendReport:
result = ltpResendReport(event.refNbr1,
event.refNbr2, event.refNbr3);
break; /* Out of switch. */
case LtpResendRecvCancel:
result = ltpResendRecvCancel(event.refNbr1,
event.refNbr2);
break; /* Out of switch. */
default: /* Spurious event. */
result = 0; /* Event is ignored. */
}
if (result < 0) /* Dispatching failed. */
{
sdr_cancel_xn(sdr);
putErrmsg("failed handing LTP event", NULL);
return result;
}
if (sdr_end_xn(sdr) < 0)
{
putErrmsg("failed dispatching LTP event", NULL);
return -1;
}
}
}
int rfx_start()
{
PsmPartition ionwm = getIonwm();
Sdr sdr = getIonsdr();
IonVdb *vdb = getIonVdb();
Object iondbObj;
IonDB iondb;
Object elt;
iondbObj = getIonDbObject();
CHKERR(sdr_begin_xn(sdr)); /* To lock memory. */
sdr_read(sdr, (char *) &iondb, iondbObj, sizeof(IonDB));
/* Destroy and re-create volatile contact and range
* databases. This prevents contact/range duplication
* as a result of adds before starting ION. */
sm_rbt_destroy(ionwm, vdb->contactIndex, rfx_erase_data, NULL);
sm_rbt_destroy(ionwm, vdb->rangeIndex, rfx_erase_data, NULL);
vdb->contactIndex = sm_rbt_create(ionwm);
vdb->rangeIndex = sm_rbt_create(ionwm);
/* Load range index for all asserted ranges. In so
* doing, load the nodes for which ranges are known
* and load events for all predicted changes in range. */
for (elt = sdr_list_first(sdr, iondb.ranges); elt;
elt = sdr_list_next(sdr, elt))
{
if (loadRange(elt) < 0)
{
putErrmsg("Can't load range.", NULL);
sdr_exit_xn(sdr);
return -1;
}
}
/* Load contact index for all contacts. In so doing,
* load the nodes for which contacts are planned (as
* necessary) and load events for all planned changes
* in data rate affecting the local node. */
iondbObj = getIonDbObject();
sdr_read(sdr, (char *) &iondb, iondbObj, sizeof(IonDB));
for (elt = sdr_list_first(sdr, iondb.contacts); elt;
elt = sdr_list_next(sdr, elt))
{
if (loadContact(elt) < 0)
{
putErrmsg("Can't load contact.", NULL);
sdr_exit_xn(sdr);
return -1;
}
}
/* Start the rfx clock if necessary. */
/*
if (vdb->clockPid == ERROR || sm_TaskExists(vdb->clockPid) == 0)
{
vdb->clockPid = pseudoshell("rfxclock");
}
*/
sdr_exit_xn(sdr); /* Unlock memory. */
return 0;
}
