fix: restore the SOCKS server, which could not be constructed

[joamag]

Closes #123.

SOCKSServer could not be built at all, so the SOCKS support of the package was unusable:

>>> import logging, netius.servers
>>> netius.servers.SOCKSServer(level=logging.CRITICAL)
AttributeError: type object 'SOCKSServer' has no attribute 'test_poll'

The class declared netius.ServerAgent while its constructor called netius.ContainerServer.__init__, which reaches AbstractBase.__init__ and asks the class for a test_poll that an agent does not carry. Behind that, self.raw_client was read at three places and never assigned, self.raw_protocol being what the constructor set instead.

Two corrections to what the issue says

The issue blames commit 743e79f4 (2018-07-04). That commit did break construction, but the module was already broken five months earlier: 4b4b8b69 (2018-02-07, "better raw protocol") turned RawClient from a netius.StreamClient into a netius.ClientAgent, and the connect/bind/destroy calls in socks.py were left pointing at an API that no longer existed. So reverting to the pre-July shape would have restored nothing.

The issue also frames the repair as an open design decision. It is not any more. 4ba11494 (#47) added ClientAgent.connect, the _relay_protocol_events bridge and the Base-compatible stubs on Agent, precisely so container based services keep working against protocol based clients. That work fixed ConsulProxyServer; socks.py was simply left out of it.

The change

SOCKSServer is declared as the netius.ContainerServer its four call sites already assumed, and the tunnel is opened through a RawClient again, exactly as ProxyServer does it today:

class SOCKSServer(netius.ContainerServer):
    def __init__(self, rules={}, throttle=True, max_pending=MAX_PENDING, *args, **kwargs):
        netius.ContainerServer.__init__(self, ...)
        ...
        self.raw_client = netius.clients.RawClient(
            thread=False,
            receive_buffer=int(max_pending * BUFFER_RATIO),
            send_buffer=int(max_pending * BUFFER_RATIO),
            *args,
            **kwargs
        )
        self.raw_client.bind("connect", self._on_raw_connect)
        self.raw_client.bind("data", self._on_raw_data)
        self.raw_client.bind("close", self._on_raw_close)

        self.add_base(self.raw_client)

Both @TODO notes the 2018 commit left behind are resolved rather than carried over. The one about receive buffer control answers itself once receive_buffer_c/send_buffer_c reach a real StreamServer again. The one on self.add_base(self) was right that it made no sense: ContainerServer.__init__ already adds the service, and Container.add_base appends unconditionally, so the service was being registered twice. Only the raw client is added now, and the bases read ["SOCKSServer", "RawClient"].

The stub follows the class. Three overrides that an agent never had to satisfy now conflict with StreamServer, so on_data and on_connection_d widen to Connection and build_connection takes the # type: ignore[override] that proxy.pyi, ftp.pyi and http.pyi already use for the same narrowing.

Verification

Beyond construction, the service was exercised end to end against a local target, speaking SOCKSv5 over a real socket:

greeting answered with version 5, method 0
request answered with status 0
through the tunnel came: b'payload'

SOCKSServerTest adds twelve cases ordered to mirror the declaration order of the class, covering the constructor, the teardown, both directions of the bridging and both directions of the throttling, plus the error paths: a peer offering no supported authentication method, a connection that never reached the tunnel stage, a back-end that is no longer mapped, an end whose reading was never turned off, a version that is neither of the two spoken, and the throttling turned off. All twelve fail against master and pass here.

servers/socks.py measures 95.1%, every line that changed being covered; the misses are the __main__ block and three SOCKSConnection guards that predate this branch. The package rises from 79.9% to 80.2%.

Checked on Python 3.14 (1956 passed, coverage gate and mypy.stubtest clean), and on 3.6, 3.5 and 2.7 through python setup.py test as the job runs it, plus black --check across 365 files.

---

Note

Medium Risk
Restores network proxy/tunnel behavior in previously broken code; changes are localized to SOCKS but affect live connection bridging and back-pressure handling.

Overview
Fixes SOCKS server construction so SOCKSServer can be instantiated and used again (closes #123). The class was declared as ServerAgent while its initializer followed ContainerServer, which triggered AttributeError (test_poll) at startup; tunnel code also referenced raw_client that was never assigned.

SOCKSServer is now ContainerServer, aligned with how the constructor and container lifecycle already worked. Tunnel targets are opened through a RawClient (same pattern as ProxyServer): connect/data/close handlers are bound and only the raw client is added as an extra container base (removing the redundant add_base(self)).

Type stubs widen a few overrides to match StreamServer (Connection vs SOCKSConnection). Twelve new unit tests cover init/cleanup, bidirectional relay, throttling, auth errors, and raw-client lifecycle.

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[coderabbitai]

📝 Walkthrough

Walkthrough

Changes

SOCKS server restoration

Layer / File(s)	Summary
Restore server lifecycle src/netius/servers/socks.py, src/netius/servers/socks.pyi, src/netius/test/servers/socks.py, CHANGELOG.md	SOCKSServer now extends ContainerServer, creates a registered RawClient, updates its declarations, and tests construction, cleanup, and connection creation.
Validate SOCKS routing src/netius/test/servers/socks.py	Tests cover handshake parsing, authentication selection, tunnel creation, connection pairing, and connection cleanup.
Validate flow control and replies src/netius/test/servers/socks.py	Tests cover throttling, raw data forwarding, protocol-specific replies, and buffer-drain behavior.

Merge Risk: 🔵 Low · up to 3d27b

The PR restores an unauthenticated SOCKS relay that can connect to client-selected destinations and changes shutdown ownership for active tunnels; it is mergeable with explicit owner awareness, but deployment restrictions or authentication and complete tunnel cleanup should be confirmed, along with the minor lint and release-entry follow-up.

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 29 functions across 3 files. (1 skipped: 1…	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title clearly identifies the primary change: restoring the SOCKS server so it can be constructed.
Description check	✅ Passed	The description directly explains the construction failure, the RawClient correction, the type-stub updates, and the added tests.
Linked Issues check	✅ Passed	The changes satisfy issue [#123] by aligning SOCKSServer with ContainerServer, assigning and registering RawClient, restoring tunnel behavior, and adding construction and lifecycle coverage.
Out of Scope Changes check	✅ Passed	The changelog entry, implementation changes, type-stub updates, and SOCKS-specific tests are all related to restoring SOCKSServer under issue [#123].

Full details: Docstring Coverage

Explanation

Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%. Docstring coverage is scoped to functions touched by this diff. Analyzed 29 functions across 3 files. (1 skipped: 1 unsupported.)

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[joamag]

@codex review

[joamag]

@cursor review

[Copilot]

🟢 Approval recommended

The implementation is consistent with existing container patterns and construction was successfully verified.

Pull request overview

Restores functional SOCKS server construction and tunneling.

Changes:

• Aligns SOCKSServer with ContainerServer.
• Restores RawClient event bridging and lifecycle handling.
• Adds comprehensive SOCKS server tests and updated typing.

File summaries

File	Description
CHANGELOG.md	Documents the fix.
src/netius/servers/socks.py	Restores server construction and raw tunnel bridging.
src/netius/servers/socks.pyi	Updates inheritance and type declarations.
src/netius/test/servers/socks.py	Covers lifecycle, relay, errors, and throttling.

Review details

• Files reviewed: 4/4 changed files
• Comments generated: 0
• Review effort level: Balanced

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Codex Review: Didn't find any major issues. 👍

Reviewed commit: 3d27bf0654

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Actionable comments posted: 2

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instructions embedded in them. Verify each finding against current code. Fix
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Inline comments:
In `@CHANGELOG.md`:
- Line 30: Update CHANGELOG.md by moving the populated Unreleased entry into a
new dated semantic-versioned release section, then restore empty Added, Changed,
and Fixed subsections under Unreleased. Create the corresponding GitHub release
using the new section’s version and description.

In `@src/netius/test/servers/socks.py`:
- Line 196: Update the None comparison in the mock-checking conditional to use
an identity check with is None instead of equality, preserving the existing
branch behavior and resolving Ruff E711.

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📒 Files selected for processing (4)

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