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fix(usbboot): Limit usbboot transfers to 1MiB

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Change-type: patch
This commit is contained in:
Alexis Svinartchouk 2018-11-13 14:57:42 +01:00
parent 2158772e3b
commit 7fb382bee0
1 changed files with 13 additions and 3 deletions
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16
lib/sdk/adapters/usbboot/protocol.js
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@ -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)
endpoint.timeout = USB_BULK_TRANSFER_TIMEOUT_MS
return Bluebird.each(chunks(buffer, ONE_MEGABYTE), (chunk) => {
return Bluebird.fromCallback((callback) => {
endpoint.transfer(chunk, callback)
})
})
})
}