static void HandleBootstrapResponse(void * ctxt, AddressType* address, const char * responsePath, int responseCode, AwaContentType contentType, char * payload, size_t payloadLen)
{
Lwm2mContextType * context = ctxt;
if (responseCode == AwaResult_SuccessChanged)
{
Lwm2m_Info("Waiting for bootstrap to finish\n");
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_BootStrapFinishPending);
Lwm2mCore_SetLastBootStrapUpdate(context, Lwm2mCore_GetTickCountMs());
}
else
{
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_BootStrapFailed);
}
}
/* The LWM2M Client MUST follow the procedure specified as below when attempting to bootstrap a LWM2M Device:
* 1. If the LWM2M Device has Smartcard, the LWM2M Client tries to obtain Bootstrap Information
* from the Smartcard using the Bootstrap from Smartcard mode.
* 2. If the LWM2M Client is not configured using the Bootstrap from Smartcard mode, the LWM2M
* Client tries to obtain the Bootstrap Information by using Factory Bootstrap mode.
* 3. If the LWM2M Client has any LWM2M Server Object Instances from the previous steps, the LWM2M
* Client tries to register to the LWM2M Server(s) configured in the LWM2M Server Object Instance(s).
* 4. If LWM2M Client fails to register to all the LWM2M Servers or the Client doesn’t have any
* LWM2M Server Object Instances, and the LWM2M Client hasn’t received a Server Initiated Bootstrap
* within the ClientHoldOffTime, the LWM2M Client performs the Client Initiated Bootstrap.
*/
void Lwm2m_UpdateBootStrapState(Lwm2mContextType * context)
{
uint32_t now = Lwm2mCore_GetTickCountMs();
uint32_t clientHoldOff;
enum { SERVER_BOOTSTRAP = 0 };
switch (Lwm2mCore_GetBootstrapState(context))
{
case Lwm2mBootStrapState_NotBootStrapped:
// First attempt smart card bootstrap.
if (BootStrapFromSmartCard(context))
{
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_BootStrapped);
}
// If that fails try and use the factory information.
else if (BootStrapFromFactory(context))
{
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_BootStrapped);
}
// If that fails wait for the client hold off time, for a server initiated bootstrap.
else
{
Lwm2m_Info("Try existing server entries\n");
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_CheckExisting);
}
Lwm2mCore_UpdateAllServers(context, Lwm2mRegistrationState_Register);
Lwm2mCore_SetLastBootStrapUpdate(context, now);
break;
case Lwm2mBootStrapState_CheckExisting:
// Pass control to Registration process, if this fails then we will
// drop into the ClientHoldOff State
break;
case Lwm2mBootStrapState_ClientHoldOff:
// Wait for server initiated bootstrap.
// Only one bootstrap server is supported.
// If the hold off timer has expired, then request a boot strap.
Lwm2m_GetClientHoldOff(context, SERVER_BOOTSTRAP, &clientHoldOff);
if (now - Lwm2mCore_GetLastBootStrapUpdate(context) >= (clientHoldOff * 1000))
{
Lwm2m_Info("Hold Off expired - attempt client-initiated bootstrap\n");
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_BootStrapPending);
SendBootStrapRequest(context, SERVER_BOOTSTRAP);
Lwm2mCore_SetLastBootStrapUpdate(context, now);
}
break;
case Lwm2mBootStrapState_BootStrapPending:
if (now - Lwm2mCore_GetLastBootStrapUpdate(context) >= BOOTSTRAP_TIMEOUT)
{
Lwm2m_Error("No response to client initiated bootstrap\n");
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_BootStrapFailed);
Lwm2mCore_SetLastBootStrapUpdate(context, now);
}
break;
case Lwm2mBootStrapState_BootStrapFinishPending:
// The 2015/07/07 LWM2M draft requires that the server sends a bootstrap finished to the clients /bs endpoint,
// however for now lets just wait up to 15 seconds and then move to BootStrapped state.
if (now - Lwm2mCore_GetLastBootStrapUpdate(context) >= BOOTSTRAP_FINISHED_TIMEOUT)
{
Lwm2m_Warning("No bootstrap finished after 15 seconds, retrying...\n");
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_BootStrapFailed);
}
break;
case Lwm2mBootStrapState_BootStrapped:
break;
case Lwm2mBootStrapState_BootStrapFailed:
// If the hold off timer has expired, then request a boot strap.
Lwm2m_GetClientHoldOff(context, SERVER_BOOTSTRAP, &clientHoldOff);
if (now - Lwm2mCore_GetLastBootStrapUpdate(context) >= (clientHoldOff * 1000))
{
Lwm2m_Warning("HoldOff Expired - Re-attempt bootstrap\n");
Lwm2mCore_SetBootstrapState(context, Lwm2mBootStrapState_NotBootStrapped);
}
break;
default:
Lwm2m_Error("Unhandled bootstrap state %d\n", Lwm2mCore_GetBootstrapState(context));
}
}