void bootstrap_step(lwm2m_context_t * contextP,
uint32_t currentTime,
time_t* timeoutP)
{
lwm2m_server_t * targetP;
targetP = contextP->bootstrapServerList;
while (targetP != NULL)
{
switch (targetP->status)
{
case STATE_DEREGISTERED:
targetP->registration = currentTime + targetP->lifetime;
targetP->status = STATE_BS_HOLD_OFF;
if (*timeoutP > targetP->lifetime)
{
*timeoutP = targetP->lifetime;
}
break;
case STATE_BS_HOLD_OFF:
if (targetP->registration <= currentTime)
{
bootstrap_initiating_request(contextP, targetP);
}
else if (*timeoutP > targetP->registration - currentTime)
{
*timeoutP = targetP->registration - currentTime;
}
break;
case STATE_BS_INITIATED:
case STATE_BS_PENDING:
// waiting
break;
case STATE_BS_FINISHED:
// do nothing
break;
case STATE_BS_FAILED:
// do nothing
break;
default:
break;
}
targetP = targetP->next;
}
}
void update_bootstrap_state(lwm2m_context_t * context,
uint32_t currentTime,
time_t* timeoutP)
{
if (context->bsState == BOOTSTRAP_REQUESTED)
{
context->bsState = BOOTSTRAP_CLIENT_HOLD_OFF;
context->bsStart = currentTime;
LOG("[BOOTSTRAP] Bootstrap requested at: %lu, now waiting during ClientHoldOffTime...\r\n",
(unsigned long)context->bsStart);
}
if (context->bsState == BOOTSTRAP_CLIENT_HOLD_OFF)
{
lwm2m_server_t * bootstrapServer = context->bootstrapServerList;
if (bootstrapServer != NULL)
{
// get ClientHoldOffTime from bootstrapServer->lifetime
// (see objects.c => object_getServers())
int32_t timeToBootstrap = (context->bsStart + bootstrapServer->lifetime) - currentTime;
LOG("[BOOTSTRAP] ClientHoldOffTime %ld\r\n", (long)timeToBootstrap);
if (0 >= timeToBootstrap)
{
bootstrap_initiating_request(context);
}
else if (timeToBootstrap < *timeoutP)
{
*timeoutP = timeToBootstrap;
}
}
else
{
bootstrap_failed(context);
}
}
if (context->bsState == BOOTSTRAP_PENDING)
{
// Use COAP_DEFAULT_MAX_AGE according proposal in
// https://github.com/OpenMobileAlliance/OMA-LwM2M-Public-Review/issues/35
int32_t timeToBootstrap = (context->bsStart + COAP_DEFAULT_MAX_AGE) - currentTime;
LOG("[BOOTSTRAP] Pending %ld\r\n", (long)timeToBootstrap);
if (0 >= timeToBootstrap)
{
// Time out and no error => bootstrap OK
// TODO: add smarter condition for bootstrap success:
// 1) security object contains at least one bootstrap server
// 2) there are coherent configurations for provisioned DM servers
// if these conditions are not met, then bootstrap has failed and previous security
// and server object configurations might be restored by client
LOG("\r\n[BOOTSTRAP] Bootstrap finished at: %lu (difftime: %lu s)\r\n",
(unsigned long)currentTime, (unsigned long)(currentTime - context->bsStart));
context->bsState = BOOTSTRAP_FINISHED;
context->bsStart = currentTime;
*timeoutP = 1;
}
else if (timeToBootstrap < *timeoutP)
{
*timeoutP = timeToBootstrap;
}
}
else if (context->bsState == BOOTSTRAP_FINISHED)
{
context->bsStart = currentTime;
if (0 <= lwm2m_start(context))
{
context->bsState = BOOTSTRAPPED;
}
else
{
bootstrap_failed(context);
}
// during next step, lwm2m_update_registrations will connect the client to DM server
}
if (BOOTSTRAP_FAILED == context->bsState)
{
lwm2m_server_t * bootstrapServer = context->bootstrapServerList;
if (bootstrapServer != NULL)
{
// get ClientHoldOffTime from bootstrapServer->lifetime
// (see objects.c => object_getServers())
int32_t timeToBootstrap = (context->bsStart + bootstrapServer->lifetime) - currentTime;
LOG("[BOOTSTRAP] Bootstrap failed: %lu, now waiting during ClientHoldOffTime %ld ...\r\n",
(unsigned long)context->bsStart, (long)timeToBootstrap);
if (0 >= timeToBootstrap)
{
context->bsState = NOT_BOOTSTRAPPED;
context->bsStart = currentTime;
LOG("[BOOTSTRAP] Bootstrap failed: retry ...\r\n");
*timeoutP = 1;
}
else if (timeToBootstrap < *timeoutP)
{
*timeoutP = timeToBootstrap;
}
}
}
}
