chore(volo): combine rustls and native-tls

[yukiiiteru]

Motivation

In previous implementation, volo::net::Conn has 4 variants: Tcp, Unix, Rustls and NativeTls, but we think it's not elegant to put Rustls and NativeTls here. And what's more, in most cases, we only need to be aware of TLS and do not need to be aware of which library is used behind it.

Solution

Wraps Rustls and NativeTls into Tls prefixed types and makes Conn cleaner.

---

Note

Unifies rustls/native-tls under generic TLS types and updates conn/transport/server paths to use Tls*, while bumping volo, volo-grpc, and volo-http versions.

• Networking/TLS:
  • Introduce unified TLS abstractions: TlsStream, TlsConnector, TlsAcceptor, OwnedReadHalf, OwnedWriteHalf in volo/src/net/tls/*.
  • Replace ConnStream::{Rustls,NativeTls} with ConnStream::Tls; update negotiated_alpn, peer_addr, and split logic accordingly in volo/src/net/conn.rs.
  • Update connector/acceptor APIs to return ConnStream via unified Tls* types; add builders and ALPN support; mark AsyncReady unsupported for TLS in volo/src/net/ready.rs.
  • Disallow Unix domain sockets for TLS transports; route TCP connects through unified TLS in TlsMakeTransport.
• HTTP (volo-http):
  • Client: TlsMakeConnection now wraps TLS handshake and returns Conn with ConnInfo using unified TlsConnector.
  • Server: perform TLS accept with ServerTlsConfig and ConnStream::Tcp only; import cleanup.
  • Cargo: pin volo = "0.11.2" and bump crate to 0.4.4.
• gRPC (volo-grpc):
  • Server: use ServerTlsConfig for TLS; minor import adjustments.
  • Cargo: bump to 0.11.8 and depend on volo = "0.11.2".
• Core (volo):
  • Expose unified TLS types and builders; adjust dialing/transport to use new TLS path; minor API return type changes (io::Result).
  • Version bump to 0.11.2 and lockfile updates.

^{Written by Cursor Bugbot for commit a1597ef. This will update automatically on new commits. Configure here.}

[PureWhiteWu]

bugbot run

[cursor]

✅ Bugbot reviewed your changes and found no bugs!

---

[codecov]

Codecov Report

❌ Patch coverage is 44.02516% with 89 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.84%. Comparing base (10e73ea) to head (3f25ef8).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
volo/src/net/tls/mod.rs	40.32%	74 Missing ⚠️
volo/src/net/conn.rs	42.10%	11 Missing ⚠️
volo/src/net/ready.rs	0.00%	2 Missing ⚠️
volo/src/net/tls/rustls.rs	75.00%	2 Missing ⚠️

❌ Your patch status has failed because the patch coverage (44.02%) is below the target coverage (70.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #627      +/-   ##
==========================================
+ Coverage   40.78%   40.84%   +0.05%     
==========================================
  Files         160      160              
  Lines       19544    19646     +102     
==========================================
+ Hits         7971     8024      +53     
- Misses      11573    11622      +49     

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