-
Notifications
You must be signed in to change notification settings - Fork 339
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
- Loading branch information
Showing
11 changed files
with
150 additions
and
23 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,93 @@ | ||
| // | ||
| // TunnelPinger.swift | ||
| // PacketTunnelCore | ||
| // | ||
| // Created by Andrew Bulhak on 2024-07-08. | ||
| // Copyright © 2024 Mullvad VPN AB. All rights reserved. | ||
| // | ||
|
|
||
| import Foundation | ||
| import MullvadLogging | ||
| import Network | ||
| import PacketTunnelCore | ||
| import WireGuardKit | ||
|
|
||
| public final class TunnelPinger: PingerProtocol { | ||
| private var sequenceNumber: UInt16 = 0 | ||
| private let stateLock = NSRecursiveLock() | ||
| private let pingQueue: DispatchQueue | ||
| private let replyQueue: DispatchQueue | ||
| private var destAddress: IPv4Address? | ||
| private var _onReply: ((PingerReply) -> Void)? | ||
| public var onReply: ((PingerReply) -> Void)? { | ||
| get { | ||
| stateLock.withLock { | ||
| return _onReply | ||
| } | ||
| } | ||
| set { | ||
| stateLock.withLock { | ||
| _onReply = newValue | ||
| } | ||
| } | ||
| } | ||
|
|
||
| private var pingProvider: ICMPPingProvider | ||
|
|
||
| private let logger: Logger | ||
|
|
||
| init(pingProvider: ICMPPingProvider, replyQueue: DispatchQueue) { | ||
| self.pingProvider = pingProvider | ||
| self.replyQueue = replyQueue | ||
| self.pingQueue = DispatchQueue(label: "PacketTunnel.icmp") | ||
| self.logger = Logger(label: "TunnelPinger") | ||
| } | ||
|
|
||
| deinit { | ||
| pingProvider.closeICMP() | ||
| } | ||
|
|
||
| public func openSocket(bindTo interfaceName: String?, destAddress: IPv4Address) throws { | ||
| try pingProvider.openICMP(address: destAddress) | ||
| self.destAddress = destAddress | ||
| } | ||
|
|
||
| public func closeSocket() { | ||
| pingProvider.closeICMP() | ||
| self.destAddress = nil | ||
| } | ||
|
|
||
| public func send() throws -> PingerSendResult { | ||
| let sequenceNumber = nextSequenceNumber() | ||
| logger.debug("*** sending ping \(sequenceNumber)") | ||
|
|
||
| pingQueue.async { [weak self] in | ||
| guard let self, let destAddress else { return } | ||
| let reply: PingerReply | ||
| do { | ||
| try pingProvider.sendICMPPing(seqNumber: sequenceNumber) | ||
| // NOTE: we cheat here by returning the destination address we were passed, rather than parsing it from the packet on the other side of the FFI boundary. | ||
| reply = .success(destAddress, sequenceNumber) | ||
| } catch { | ||
| reply = .parseError(error) | ||
| } | ||
| self.logger.debug("--- Pinger reply: \(reply)") | ||
|
|
||
| replyQueue.async { [weak self] in | ||
| guard let self else { return } | ||
| self.onReply?(reply) | ||
| } | ||
| } | ||
|
|
||
| return PingerSendResult(sequenceNumber: UInt16(sequenceNumber)) | ||
| } | ||
|
|
||
| private func nextSequenceNumber() -> UInt16 { | ||
| stateLock.lock() | ||
| let (nextValue, _) = sequenceNumber.addingReportingOverflow(1) | ||
| sequenceNumber = nextValue | ||
| stateLock.unlock() | ||
|
|
||
| return nextValue | ||
| } | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters