1057     char     packet[kMaxIp6Size + 4];  in processReceive()  local
1061     uint16_t maxLength = sizeof(packet) - 4;  in processReceive()
1072 …VerifyOrExit(otMessageRead(aMessage, 0, &packet[offset], maxLength) == length, error = OT_ERROR_NO…  in processReceive()
1076     otDumpInfoPlat("", &packet[offset], length);  in processReceive()
1080     packet[0] = 0;  in processReceive()
1081     packet[1] = 0;  in processReceive()
1082     packet[2] = (PF_INET6 << 8) & 0xFF;  in processReceive()
1083     packet[3] = (PF_INET6 << 0) & 0xFF;  in processReceive()
1087     VerifyOrExit(write(sTunFd, packet, length) == length, perror("write"); error = OT_ERROR_FAILED);  in processReceive()
1205     char       packet[kMaxIp6Size];  in processTransmit()  local
1214     rval = read(sTunFd, packet, sizeof(packet));  in processTransmit()
1219     if ((rval >= 4) && (packet[0] == 0) && (packet[1] == 0))  in processTransmit()
1227 …if (tryProcessIcmp6RaMessage(aInstance, reinterpret_cast<uint8_t *>(&packet[offset]), rval) == OT_…  in processTransmit()
1239         isIp4   = (getIpVersion(reinterpret_cast<uint8_t *>(&packet[offset])) == kIpVersion4);  in processTransmit()
1250     otDumpInfoPlat("", &packet[offset], static_cast<size_t>(rval));  in processTransmit()
1253     SuccessOrExit(error = otMessageAppend(message, &packet[offset], static_cast<uint16_t>(rval)));  in processTransmit()