message: fix(usbboot): Limit usbboot transfers to 1MiB
  Change-type: patch
diff: @@ -30,6 +30,8 @@ const usb = require('./usb')
  const NULL_BUFFER_SIZE = 0
  const NULL_BUFFER = Buffer.alloc(NULL_BUFFER_SIZE)
  +const ONE_MEGABYTE = 1048576
  +
  /**
  * @summary The size of the boot message bootcode length section
  * @type {Number}
  @@ -206,6 +208,12 @@ exports.sendBufferSize = (device, size) => {
  })
  }
  +const chunks = function *(buffer, size) {
  + for (let start = 0; start < buffer.length; start += size) {
  + yield buffer.slice(start, start + size)
  + }
  +}
  +
  /**
  * @summary Write a buffer to an OUT endpoint
  * @function
  @@ -231,9 +239,11 @@ exports.write = (device, endpoint, buffer) => {
  .delay(USB_REQUEST_DELAY_MS)
  .then(() => {
  - return Bluebird.fromCallback((callback) => {
  endpoint.timeout = USB_BULK_TRANSFER_TIMEOUT_MS
  - endpoint.transfer(buffer, callback)
  + return Bluebird.each(chunks(buffer, ONE_MEGABYTE), (chunk) => {
  + return Bluebird.fromCallback((callback) => {
  + endpoint.transfer(chunk, callback)
  + })
  })
  })
  }
  