Fix `dap::Socket::read()` when `recv()` errors

Identified by @kuafuwang. Fixes #29

Fix `dap::Socket::read()` when `recv()` errors
ad9b4588 · Ben Clayton · 9e313445 · ad9b4588
Commit ad9b4588 authored May 26, 2020 by Ben Clayton
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socket.cpp src/socket.cpp +3 -1

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--- a/src/socket.cpp
+++ b/src/socket.cpp
@@ -158,7 +158,9 @@ class dap::Socket::Shared : public dap::ReaderWriter {
    if (s == InvalidSocket) {
      return 0;
    }
-    return recv(s, reinterpret_cast<char*>(buffer), static_cast<int>(bytes), 0);
+    auto len =
+        recv(s, reinterpret_cast<char*>(buffer), static_cast<int>(bytes), 0);
+    return (len < 0) ? 0 : len;
  }

  bool write(const void* buffer, size_t bytes) {