307     ElapsedTime option;  in AppendElapsedTime()  local
309     option.Init();  in AppendElapsedTime()
310 …  option.SetElapsedTime(static_cast<uint16_t>(Time::MsecToSec(TimerMilli::GetNow() - mStartTime)));  in AppendElapsedTime()
311     return aMessage.Append(option);  in AppendElapsedTime()
316     ClientIdentifier option;  in AppendClientIdentifier()  local
321     option.Init();  in AppendClientIdentifier()
322     option.SetDuidType(kDuidLinkLayerAddress);  in AppendClientIdentifier()
323     option.SetDuidHardwareType(kHardwareTypeEui64);  in AppendClientIdentifier()
324     option.SetDuidLinkLayerAddress(eui64);  in AppendClientIdentifier()
326     return aMessage.Append(option);  in AppendClientIdentifier()
334     IaNa     option;  in AppendIaNa()  local
354     option.Init();  in AppendIaNa()
355     option.SetLength(length);  in AppendIaNa()
356     option.SetIaid(0);  in AppendIaNa()
357     option.SetT1(0);  in AppendIaNa()
358     option.SetT2(0);  in AppendIaNa()
359     SuccessOrExit(error = aMessage.Append(option));  in AppendIaNa()
368     IaAddress option;  in AppendIaAddress()  local
372     option.Init();  in AppendIaAddress()
379             option.SetAddress(idAssociation.mNetifAddress.GetAddress());  in AppendIaAddress()
380             option.SetPreferredLifetime(0);  in AppendIaAddress()
381             option.SetValidLifetime(0);  in AppendIaAddress()
382             SuccessOrExit(error = aMessage.Append(option));  in AppendIaAddress()
392     RapidCommit option;  in AppendRapidCommit()  local
394     option.Init();  in AppendRapidCommit()
395     return aMessage.Append(option);  in AppendRapidCommit()
456         Option option;  in FindOption()  local
458         SuccessOrExit(aMessage.Read(static_cast<uint16_t>(offset), option));  in FindOption()
460         if (option.GetCode() == aCode)  in FindOption()
465         offset += sizeof(option) + option.GetLength();  in FindOption()
475     ServerIdentifier option;  in ProcessServerIdentifier()  local
477     SuccessOrExit(aMessage.Read(aOffset, option));  in ProcessServerIdentifier()
478     VerifyOrExit(((option.GetDuidType() == kDuidLinkLayerAddressPlusTime) &&  in ProcessServerIdentifier()
479                   (option.GetDuidHardwareType() == kHardwareTypeEthernet)) ||  in ProcessServerIdentifier()
480                      ((option.GetLength() == (sizeof(option) - sizeof(Option))) &&  in ProcessServerIdentifier()
481                       (option.GetDuidType() == kDuidLinkLayerAddress) &&  in ProcessServerIdentifier()
482                       (option.GetDuidHardwareType() == kHardwareTypeEui64)),  in ProcessServerIdentifier()
491     ClientIdentifier option;  in ProcessClientIdentifier()  local
496     SuccessOrExit(error = aMessage.Read(aOffset, option));  in ProcessClientIdentifier()
498 …(option.GetLength() == (sizeof(option) - sizeof(Option))) && (option.GetDuidType() == kDuidLinkLay…  in ProcessClientIdentifier()
499 …(option.GetDuidHardwareType() == kHardwareTypeEui64) && (option.GetDuidLinkLayerAddress() == eui64…  in ProcessClientIdentifier()
508     IaNa     option;  in ProcessIaNa()  local
512     SuccessOrExit(error = aMessage.Read(aOffset, option));  in ProcessIaNa()
514     aOffset += sizeof(option);  in ProcessIaNa()
515     length = option.GetLength() - (sizeof(option) - sizeof(Option));  in ProcessIaNa()
544     StatusCode option;  in ProcessStatusCode()  local
546     SuccessOrExit(error = aMessage.Read(aOffset, option));  in ProcessStatusCode()
547 …VerifyOrExit((option.GetLength() >= sizeof(option) - sizeof(Option)) && (option.GetStatusCode() ==…  in ProcessStatusCode()
557     IaAddress option;  in ProcessIaAddress()  local
559     SuccessOrExit(error = aMessage.Read(aOffset, option));  in ProcessIaAddress()
560     VerifyOrExit(option.GetLength() == sizeof(option) - sizeof(Option), error = kErrorParse);  in ProcessIaAddress()
569         if (idAssociation.mNetifAddress.GetAddress().PrefixMatch(option.GetAddress()) >=  in ProcessIaAddress()
572             idAssociation.mNetifAddress.mAddress       = option.GetAddress();  in ProcessIaAddress()
573             idAssociation.mPreferredLifetime           = option.GetPreferredLifetime();  in ProcessIaAddress()
574             idAssociation.mValidLifetime               = option.GetValidLifetime();  in ProcessIaAddress()
576             idAssociation.mNetifAddress.mPreferred     = option.GetPreferredLifetime() != 0;  in ProcessIaAddress()
577             idAssociation.mNetifAddress.mValid         = option.GetValidLifetime() != 0;  in ProcessIaAddress()