mirror of https://github.com/vacp2p/nim-libp2p.git
151 lines
4.6 KiB
Nim
151 lines
4.6 KiB
Nim
## Nim-LibP2P
|
|
## Copyright (c) 2019 Status Research & Development GmbH
|
|
## Licensed under either of
|
|
## * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
|
|
## * MIT license ([LICENSE-MIT](LICENSE-MIT))
|
|
## at your option.
|
|
## This file may not be copied, modified, or distributed except according to
|
|
## those terms.
|
|
|
|
import strformat
|
|
import chronos, chronicles
|
|
import types,
|
|
coder,
|
|
nimcrypto/utils,
|
|
../../stream/bufferstream,
|
|
../../stream/lpstream,
|
|
../../connection
|
|
|
|
logScope:
|
|
topic = "MplexChannel"
|
|
|
|
const DefaultChannelSize* = DefaultBufferSize * 64 # 64kb
|
|
|
|
type
|
|
LPChannel* = ref object of BufferStream
|
|
id*: uint
|
|
name*: string
|
|
conn*: Connection
|
|
initiator*: bool
|
|
isReset*: bool
|
|
closedLocal*: bool
|
|
closedRemote*: bool
|
|
handlerFuture*: Future[void]
|
|
msgCode*: MessageType
|
|
closeCode*: MessageType
|
|
resetCode*: MessageType
|
|
asyncLock: AsyncLock
|
|
|
|
proc newChannel*(id: uint,
|
|
conn: Connection,
|
|
initiator: bool,
|
|
name: string = "",
|
|
size: int = DefaultChannelSize): LPChannel =
|
|
new result
|
|
result.id = id
|
|
result.name = name
|
|
result.conn = conn
|
|
result.initiator = initiator
|
|
result.msgCode = if initiator: MessageType.MsgOut else: MessageType.MsgIn
|
|
result.closeCode = if initiator: MessageType.CloseOut else: MessageType.CloseIn
|
|
result.resetCode = if initiator: MessageType.ResetOut else: MessageType.ResetIn
|
|
result.asyncLock = newAsyncLock()
|
|
|
|
let chan = result
|
|
proc writeHandler(data: seq[byte]): Future[void] {.async, gcsafe.} =
|
|
# writes should happen in sequence
|
|
await chan.asyncLock.acquire()
|
|
info "writeHandler: sending data ", data = data.toHex(), id = chan.id
|
|
await conn.writeMsg(chan.id, chan.msgCode, data) # write header
|
|
chan.asyncLock.release()
|
|
|
|
result.initBufferStream(writeHandler, size)
|
|
|
|
proc closeMessage(s: LPChannel) {.async, gcsafe.} =
|
|
await s.conn.writeMsg(s.id, s.closeCode) # write header
|
|
|
|
proc closed*(s: LPChannel): bool =
|
|
s.closedLocal and s.closedLocal
|
|
|
|
proc closedByRemote*(s: LPChannel) {.async.} =
|
|
s.closedRemote = true
|
|
|
|
proc cleanUp*(s: LPChannel): Future[void] =
|
|
result = procCall close(BufferStream(s))
|
|
|
|
method close*(s: LPChannel) {.async, gcsafe.} =
|
|
s.closedLocal = true
|
|
await s.closeMessage()
|
|
|
|
proc resetMessage(s: LPChannel) {.async, gcsafe.} =
|
|
await s.conn.writeMsg(s.id, s.resetCode)
|
|
|
|
proc resetByRemote*(s: LPChannel) {.async, gcsafe.} =
|
|
await allFutures(s.close(), s.closedByRemote())
|
|
s.isReset = true
|
|
|
|
proc reset*(s: LPChannel) {.async.} =
|
|
await allFutures(s.resetMessage(), s.resetByRemote())
|
|
|
|
proc isReadEof(s: LPChannel): bool =
|
|
bool((s.closedRemote or s.closedLocal) and s.len() < 1)
|
|
|
|
proc pushTo*(s: LPChannel, data: seq[byte]): Future[void] {.gcsafe.} =
|
|
if s.closedRemote:
|
|
raise newLPStreamClosedError()
|
|
result = procCall pushTo(BufferStream(s), data)
|
|
|
|
method read*(s: LPChannel, n = -1): Future[seq[byte]] {.gcsafe.} =
|
|
if s.isReadEof():
|
|
raise newLPStreamClosedError()
|
|
result = procCall read(BufferStream(s), n)
|
|
|
|
method readExactly*(s: LPChannel,
|
|
pbytes: pointer,
|
|
nbytes: int):
|
|
Future[void] {.gcsafe.} =
|
|
if s.isReadEof():
|
|
raise newLPStreamClosedError()
|
|
result = procCall readExactly(BufferStream(s), pbytes, nbytes)
|
|
|
|
method readLine*(s: LPChannel,
|
|
limit = 0,
|
|
sep = "\r\n"):
|
|
Future[string] {.gcsafe.} =
|
|
if s.isReadEof():
|
|
raise newLPStreamClosedError()
|
|
result = procCall readLine(BufferStream(s), limit, sep)
|
|
|
|
method readOnce*(s: LPChannel,
|
|
pbytes: pointer,
|
|
nbytes: int):
|
|
Future[int] {.gcsafe.} =
|
|
if s.isReadEof():
|
|
raise newLPStreamClosedError()
|
|
result = procCall readOnce(BufferStream(s), pbytes, nbytes)
|
|
|
|
method readUntil*(s: LPChannel,
|
|
pbytes: pointer, nbytes: int,
|
|
sep: seq[byte]):
|
|
Future[int] {.gcsafe.} =
|
|
if s.isReadEof():
|
|
raise newLPStreamClosedError()
|
|
result = procCall readOnce(BufferStream(s), pbytes, nbytes)
|
|
|
|
method write*(s: LPChannel,
|
|
pbytes: pointer,
|
|
nbytes: int): Future[void] {.gcsafe.} =
|
|
if s.closedLocal:
|
|
raise newLPStreamClosedError()
|
|
result = procCall write(BufferStream(s), pbytes, nbytes)
|
|
|
|
method write*(s: LPChannel, msg: string, msglen = -1) {.async, gcsafe.} =
|
|
if s.closedLocal:
|
|
raise newLPStreamClosedError()
|
|
result = procCall write(BufferStream(s), msg, msglen)
|
|
|
|
method write*(s: LPChannel, msg: seq[byte], msglen = -1) {.async, gcsafe.} =
|
|
if s.closedLocal:
|
|
raise newLPStreamClosedError()
|
|
result = procCall write(BufferStream(s), msg, msglen)
|