peer_connection_server: fix static analysis issues

coverity flags two issues on this:
* no copy constructor (and assignment operator) for things that free in the destructor
* missing return value check on setsockopt

BUG=None

Change-Id: I0671bf5f9bc0ede968f80c3686bf7bbd8eb63e98
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/226743
Commit-Queue: Tommi <tommi@webrtc.org>
Reviewed-by: Tommi <tommi@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#34547}

examples/peerconnection/server/data_socket.cc

diff --git a/examples/peerconnection/server/data_socket.cc b/examples/peerconnection/server/data_socket.cc
index 2d595a0..c57d992 100644
--- a/examples/peerconnection/server/data_socket.cc
+++ b/examples/peerconnection/server/data_socket.cc
@@ -269,8 +269,12 @@
 bool ListeningSocket::Listen(unsigned short port) {
   RTC_DCHECK(valid());
   int enabled = 1;
-  setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR,
-             reinterpret_cast<const char*>(&enabled), sizeof(enabled));
+  if (setsockopt(socket_, SOL_SOCKET, SO_REUSEADDR,
+                 reinterpret_cast<const char*>(&enabled),
+                 sizeof(enabled)) != 0) {
+    printf("setsockopt failed\n");
+    return false;
+  }
   struct sockaddr_in addr = {0};
   addr.sin_family = AF_INET;
   addr.sin_addr.s_addr = htonl(INADDR_ANY);

examples/peerconnection/server/data_socket.h

diff --git a/examples/peerconnection/server/data_socket.h b/examples/peerconnection/server/data_socket.h
index 4429bc5..bafa5d3 100644
--- a/examples/peerconnection/server/data_socket.h
+++ b/examples/peerconnection/server/data_socket.h
@@ -37,6 +37,8 @@
  public:
   SocketBase() : socket_(INVALID_SOCKET) {}
   explicit SocketBase(NativeSocket socket) : socket_(socket) {}
+  SocketBase(SocketBase& other) = delete;
+  SocketBase& operator=(const SocketBase& other) = delete;
   ~SocketBase() { Close(); }
 
   NativeSocket socket() const { return socket_; }