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Apache License
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Version 2.0, January 2004
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http://www.apache.org/licenses/
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|
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TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
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|
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1. Definitions.
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Copyright 2018 Status Research & Development GmbH
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Licensed under the Apache License, Version 2.0 (the "License");
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@ -0,0 +1,21 @@
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The MIT License (MIT)
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Copyright (c) 2018 Status Research & Development GmbH
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
|
||||
|
|
@ -0,0 +1,45 @@
|
|||
# nim-binary-serialization
|
||||
|
||||
Binary packed serialization compatible with the [nim-serialization](https://github.com/status-im/nim-serialization) framework.
|
||||
|
||||
## Usage
|
||||
|
||||
```nim
|
||||
type
|
||||
Example = object
|
||||
first: uint8
|
||||
second: uint16
|
||||
|
||||
let ex = Example(first: 5.uint8, second: 12.uint16)
|
||||
assert Binary.encode(ex) == @[5.uint8, 0, 12]
|
||||
|
||||
type
|
||||
SeqHolder = object
|
||||
# bin_value is used during encoding instead of the actual value
|
||||
seqLength {.bin_value: it.vals.len.}: uint8
|
||||
# bin_len is the length of the sequence in element, used during decoding
|
||||
vals {.bin_len: it.seqLength.}: seq[Example]
|
||||
|
||||
assert Binary.encode(SeqHolder(vals: @[ex, ex])) == @[2.uint8, 5, 0, 12, 5, 0, 12]
|
||||
|
||||
type
|
||||
ByteSharing = object
|
||||
a {.bin_bitsize: 3.}: uint8
|
||||
b {.bin_bitsize: 5.}: uint8
|
||||
|
||||
assert Binary.encode(ByteSharing(a: 2.uint8, b: 4.uint8)) == @[68.uint8]
|
||||
```
|
||||
|
||||
You can find real examples in the tests (including IP frames, Yamux header, more to come)
|
||||
|
||||
## License
|
||||
|
||||
Licensed and distributed under either of
|
||||
|
||||
* MIT license: [LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT
|
||||
|
||||
or
|
||||
|
||||
* Apache License, Version 2.0, ([LICENSE-APACHEv2](LICENSE-APACHEv2) or http://www.apache.org/licenses/LICENSE-2.0)
|
||||
|
||||
at your option. These files may not be copied, modified, or distributed except according to those terms.
|
||||
|
|
@ -0,0 +1,6 @@
|
|||
import
|
||||
serialization, binary_serialization/[format, reader, writer]
|
||||
|
||||
export
|
||||
serialization, format, reader, writer
|
||||
|
||||
|
|
@ -0,0 +1,10 @@
|
|||
packageName = "binary_serialization"
|
||||
version = "0.1.0"
|
||||
author = "Status Research & Development GmbH"
|
||||
description = "Flexible binary serialization not relying on run-time type information"
|
||||
license = "Apache License 2.0"
|
||||
skipDirs = @["tests"]
|
||||
|
||||
requires "nim >= 1.2.16",
|
||||
"serialization",
|
||||
"stew"
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
import
|
||||
serialization/formats
|
||||
|
||||
serializationFormat Binary,
|
||||
mimeType = "application/octet-stream"
|
||||
|
||||
template supports*(_: type Binary, T: type): bool =
|
||||
false
|
||||
|
||||
template bin_bitsize*(size: int) {.pragma.}
|
||||
template bin_len*(size: untyped) {.pragma.}
|
||||
template bin_value*(size: untyped) {.pragma.}
|
||||
|
|
@ -0,0 +1,84 @@
|
|||
|
||||
import
|
||||
std/[tables, strutils, typetraits, macros, strformat],
|
||||
stew/[endians2, objects],
|
||||
faststreams/inputs, serialization/[formats, object_serialization, errors],
|
||||
format
|
||||
|
||||
export
|
||||
inputs
|
||||
|
||||
type
|
||||
BinaryReader* = object
|
||||
stream: InputStream
|
||||
arrayLen: int
|
||||
|
||||
bitSize: int
|
||||
workingByte: byte
|
||||
remaining: int
|
||||
|
||||
Binary.setReader BinaryReader
|
||||
|
||||
proc init*(T: type BinaryReader, stream: InputStream): T =
|
||||
T(stream: stream)
|
||||
|
||||
proc readValue*[T](r: var BinaryReader, value: var T) =
|
||||
when sizeof(value) == 1:
|
||||
type E = uint8
|
||||
elif sizeof(value) == 2:
|
||||
type E = uint16
|
||||
elif sizeof(value) == 4:
|
||||
type E = uint32
|
||||
elif sizeof(value) == 8:
|
||||
type E = uint64
|
||||
|
||||
when value is SomeUnsignedInt:
|
||||
when value is uint8:
|
||||
if r.bitSize > 0:
|
||||
let mask = ((1 shl r.bitSize) - 1).uint8
|
||||
r.remaining.dec(r.bitSize)
|
||||
value = (r.workingByte shr r.remaining) and mask
|
||||
return
|
||||
let length = sizeof(value)
|
||||
value = fromBytes(type value, r.stream.read(length), bigEndian)
|
||||
elif value is enum:
|
||||
var asUInt: E
|
||||
r.readValue(asUint)
|
||||
#TODO raise instead
|
||||
assert value.checkedEnumAssign(asUInt):
|
||||
elif value is set:
|
||||
var asUInt: E
|
||||
r.readValue(asUint)
|
||||
#TODO is this safe enough?
|
||||
value = cast[type(value)](asUInt)
|
||||
elif value is object:
|
||||
value.enumInstanceSerializedFields(fieldName, field):
|
||||
when field.hasCustomPragma(bin_len):
|
||||
let it = value
|
||||
#TODO safer conversion
|
||||
r.arrayLen = int(field.getCustomPragmaVal(bin_len))
|
||||
|
||||
when field.hasCustomPragma(bin_bitsize):
|
||||
when field isnot uint8:
|
||||
{.error: "bit_bitsize only applies to byte".}
|
||||
r.bitSize = (int)field.getCustomPragmaVal(bin_bitsize)
|
||||
assert r.bitSize in 1 ..< 8
|
||||
|
||||
if r.remaining == 0:
|
||||
r.workingByte = r.stream.read
|
||||
r.remaining = 8
|
||||
|
||||
var vall: type(field)
|
||||
r.readValue(vall)
|
||||
field = vall
|
||||
r.bitSize = 0
|
||||
elif value is seq:
|
||||
for _ in 0 ..< r.arrayLen:
|
||||
var subValue: type(value[0])
|
||||
r.readValue(subValue)
|
||||
value.add(subValue)
|
||||
elif value is array:
|
||||
for i in 0 ..< value.len:
|
||||
r.readValue(value[i])
|
||||
else:
|
||||
{.error: "Unsupported type " & $type(value).}
|
||||
|
|
@ -0,0 +1,83 @@
|
|||
import
|
||||
std/[typetraits, macros],
|
||||
stew/endians2,
|
||||
faststreams/[outputs], serialization,
|
||||
format
|
||||
|
||||
export outputs
|
||||
|
||||
type
|
||||
BinaryWriter* = object
|
||||
stream: OutputStream
|
||||
bitSize: int
|
||||
workingByte: byte
|
||||
position: int
|
||||
|
||||
Binary.setWriter BinaryWriter,
|
||||
PreferredOutput = seq[byte]
|
||||
|
||||
proc init*(W: type BinaryWriter, stream: OutputStream,
|
||||
pretty = false, typeAnnotations = false): W =
|
||||
W(stream: stream)
|
||||
|
||||
proc writeValue*(w: var BinaryWriter, value: auto) =
|
||||
let it = value
|
||||
|
||||
assert (value is uint8 and w.bitSize != 0) or w.position == 0 or value is object
|
||||
|
||||
when sizeof(value) == 1:
|
||||
type E = uint8
|
||||
elif sizeof(value) == 2:
|
||||
type E = uint16
|
||||
elif sizeof(value) == 4:
|
||||
type E = uint32
|
||||
elif sizeof(value) == 8:
|
||||
type E = uint64
|
||||
|
||||
when value is SomeUnsignedInt:
|
||||
when value is uint8:
|
||||
if w.bitSize > 0:
|
||||
assert w.position + w.bitSize <= 8
|
||||
let
|
||||
mask = ((1 shl w.bitSize) - 1).uint8
|
||||
masked = value and mask
|
||||
shifted = masked shl (8 - w.position - w.bitSize)
|
||||
assert masked == value
|
||||
w.workingByte = w.workingByte or shifted
|
||||
w.position.inc(w.bitSize)
|
||||
if w.position == 8:
|
||||
w.stream.write w.workingByte
|
||||
w.position = 0
|
||||
w.workingByte = 0
|
||||
return
|
||||
|
||||
w.stream.write toBytes(value, bigEndian)
|
||||
elif value is enum:
|
||||
w.writeValue(E(value))
|
||||
elif value is set:
|
||||
w.writeValue(cast[E](value))
|
||||
elif value is object:
|
||||
value.enumInstanceSerializedFields(fieldName, field):
|
||||
var fieldVal = field
|
||||
|
||||
when field.hasCustomPragma(bin_bitsize):
|
||||
when field isnot uint8:
|
||||
{.error: "bit_bitsize only applies to byte".}
|
||||
w.bitSize = (int)field.getCustomPragmaVal(bin_bitsize)
|
||||
assert w.bitSize in 1 ..< 8
|
||||
|
||||
when field.hasCustomPragma(bin_value):
|
||||
#TODO safer conversion
|
||||
fieldVal = (type field)field.getCustomPragmaVal(bin_value)
|
||||
w.writeFieldIMPL(FieldTag[type value, fieldName], fieldVal, value)
|
||||
w.bitSize = 0
|
||||
|
||||
if w.position > 0:
|
||||
w.stream.write w.workingByte
|
||||
w.position = 0
|
||||
w.workingByte = 0
|
||||
elif value is seq | array | openarray:
|
||||
for subV in value:
|
||||
w.writeValue(subV)
|
||||
else:
|
||||
{.error: "Unsupported type " & $type(value).}
|
||||
|
|
@ -0,0 +1,92 @@
|
|||
import
|
||||
strutils, unittest, stew/byteutils,
|
||||
serialization/object_serialization,
|
||||
serialization/testing/generic_suite,
|
||||
../binary_serialization
|
||||
|
||||
## IP
|
||||
type
|
||||
Ip4Packet = object
|
||||
ihl {.bin_bitsize: 4, bin_value: (20 + it.options.len) div 4.}: uint8
|
||||
dscp {.bin_bitsize: 6.}: uint8
|
||||
ecn {.bin_bitsize: 2.}: uint8
|
||||
totalLength {.bin_value: it.payload.len + 20 + it.options.len.}: uint16
|
||||
identification: uint16
|
||||
flags {.bin_bitsize: 3.}: uint8
|
||||
# doesn't handle bitsize > 8 for now
|
||||
fragmentOffset1 {.bin_bitsize: 5.}: uint8
|
||||
fragmentOffset2: uint8
|
||||
ttl: uint8
|
||||
protocol: uint8
|
||||
headerChecksum: uint16
|
||||
sourceIpAddress: array[4, byte]
|
||||
targetIpAddress: array[4, byte]
|
||||
options {.bin_len: it.ihl * 4 - 20.}: seq[byte]
|
||||
payload {.bin_len: it.totalLength - it.ihl * 4.}: seq[byte]
|
||||
|
||||
Ip6Packet = object
|
||||
# doesn't handle bitsize > 8 for now
|
||||
trafficClass1 {.bin_bitsize: 4.}: uint8
|
||||
trafficClass2 {.bin_bitsize: 4.}: uint8
|
||||
flowLabel1 {.bin_bitsize: 4.}: uint8
|
||||
flowLabel2: uint16
|
||||
payloadLength {.bin_value: it.payload.len.}: uint16
|
||||
nextHeader: uint8
|
||||
hopLimit: uint8
|
||||
sourceIpAddress: array[16, byte]
|
||||
targetIpAddress: array[16, byte]
|
||||
payload {.bin_len: it.payloadLength.}: seq[byte]
|
||||
|
||||
IpPacket = object
|
||||
case version {.bin_bitsize: 4.}: uint8
|
||||
of 4: ip4Packet: Ip4Packet
|
||||
of 6: ip6Packet: Ip6Packet
|
||||
else: discard
|
||||
|
||||
## Yamux
|
||||
|
||||
type
|
||||
MsgType {.size: 2.} = enum
|
||||
Data = 0x0
|
||||
WindowUpdate = 0x1
|
||||
Ping = 0x2
|
||||
GoAway = 0x3
|
||||
|
||||
MsgFlags {.size: 2.} = enum
|
||||
Syn
|
||||
Ack
|
||||
Fin
|
||||
Rst
|
||||
|
||||
YamuxHeader = object
|
||||
version: uint8
|
||||
msgType: MsgType
|
||||
flags: set[MsgFlags]
|
||||
streamId: uint32
|
||||
length: uint32
|
||||
|
||||
|
||||
|
||||
suite "simple tests":
|
||||
test "Ip":
|
||||
let
|
||||
# we don't need to specify ihl & totalLength, but `==` would fail without them
|
||||
ipPacket = IpPacket(version: 4, ip4Packet: Ip4Packet(ihl: 5, totalLength: 20))
|
||||
asBin = Binary.encode(ipPacket)
|
||||
rt = Binary.decode(asBin, IpPacket)
|
||||
check $ipPacket == $rt
|
||||
check $Binary.decode("45000014dc14400037067a0fa35f87eac0a80113".hexToSeqByte(), IpPacket) ==
|
||||
$IpPacket(version: 4, ip4Packet:
|
||||
Ip4Packet(ihl: 5,
|
||||
dscp: 0, ecn: 0, totalLength: 20,
|
||||
identification: 56340, flags: 2, fragmentOffset1: 0, fragmentOffset2: 0,
|
||||
ttl: 55, protocol: 6, headerChecksum: 31247,
|
||||
sourceIpAddress: [163.byte, 95, 135, 234], targetIpAddress: [192.byte, 168, 1, 19], options: @[], payload: @[]))
|
||||
|
||||
test "Yamux":
|
||||
let
|
||||
ipPacket = YamuxHeader()
|
||||
asBin = Binary.encode(ipPacket)
|
||||
rt = Binary.decode(asBin, YamuxHeader)
|
||||
|
||||
check $rt == $ipPacket
|
||||
Loading…
Reference in New Issue