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Fix byte orders in mac address

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This commit is contained in:
Mygod
2021-05-19 16:17:04 -04:00
parent 68f8ac5c92
commit 0b6e5e39c0
2 changed files with 19 additions and 25 deletions
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34
mobile/src/main/java/be/mygod/vpnhotspot/net/MacAddressCompat.kt
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@@ -21,18 +21,6 @@ value class MacAddressCompat(val addr: Long) {
val ALL_ZEROS_ADDRESS = MacAddressCompat(0)
val ANY_ADDRESS = MacAddressCompat(2)
fun bytesToString(addr: ByteArray) = when (addr.size) {
ETHER_ADDR_LEN -> addr.joinToString(":") { "%02x".format(it) }
8 -> {
require(addr.take(2).all { it == 0.toByte() }) {
"Unrecognized padding " + addr.joinToString(":") { "%02x".format(it) }
}
addr.drop(2).joinToString(":") { "%02x".format(it) }
}
else -> throw IllegalArgumentException(addr.joinToString(":") { "%02x".format(it) } +
" was not a valid MAC address")
}
/**
* Creates a MacAddress from the given byte array representation.
* A valid byte array representation for a MacAddress is a non-null array of length 6.
@@ -41,13 +29,21 @@ value class MacAddressCompat(val addr: Long) {
* @return the MacAddress corresponding to the given byte array representation.
* @throws IllegalArgumentException if the given byte array is not a valid representation.
*/
fun fromBytes(addr: ByteArray): MacAddressCompat {
require(addr.size == ETHER_ADDR_LEN) { addr.joinToString() + " was not a valid MAC address" }
return ByteBuffer.allocate(Long.SIZE_BYTES).run {
put(addr)
rewind()
MacAddressCompat(long)
}
fun fromBytes(addr: ByteArray) = ByteBuffer.allocate(Long.SIZE_BYTES).run {
order(ByteOrder.LITTLE_ENDIAN)
put(when (addr.size) {
ETHER_ADDR_LEN -> addr
8 -> {
require(addr.take(2).all { it == 0.toByte() }) {
"Unrecognized padding " + addr.joinToString(":") { "%02x".format(it) }
}
addr.drop(2).toByteArray()
}
else -> throw IllegalArgumentException(addr.joinToString(":") { "%02x".format(it) } +
" was not a valid MAC address")
})
rewind()
MacAddressCompat(long)
}
/**
* Creates a MacAddress from the given String representation. A valid String representation