[Lldb-commits] [PATCH] D79757: Try IPv4 before IPv6 when creating TCP connection

[Emre Kultursay via Phabricator via lldb-commits]

emrekultursay updated this revision to Diff 263327.
emrekultursay added a comment.

Update commit message.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D79757/new/

https://reviews.llvm.org/D79757

Files:
  lldb/source/Host/common/TCPSocket.cpp


Index: lldb/source/Host/common/TCPSocket.cpp
===================================================================
--- lldb/source/Host/common/TCPSocket.cpp
+++ lldb/source/Host/common/TCPSocket.cpp
@@ -162,6 +162,12 @@
 
   std::vector<SocketAddress> addresses = SocketAddress::GetAddressInfo(
       host_str.c_str(), nullptr, AF_UNSPEC, SOCK_STREAM, IPPROTO_TCP);
+  // IPv4 is more likely to succeed than IPv6. To avoid costly retries,
+  // we sort based on family to prioritize IPv4 over IPv6.
+  std::sort(addresses.begin(), addresses.end(),
+            [](SocketAddress a, SocketAddress b) {
+              return a.GetFamily() < b.GetFamily();
+            });
   for (SocketAddress &address : addresses) {
     error = CreateSocket(address.GetFamily());
     if (error.Fail())


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