From f187708b3b6bcb95a0d92908f8a90c1431ca2578 Mon Sep 17 00:00:00 2001
From: Patric Stout <truebrain@openttd.org>
Date: Sat, 8 May 2021 11:57:41 +0200
Subject: [PATCH] Fix f7e390bd: getpeername() doesn't work on closed sockets
 (#9213)

---
 src/network/core/tcp.h           |  4 +++-
 src/network/core/tcp_connect.cpp | 12 ++++++++++--
 2 files changed, 13 insertions(+), 3 deletions(-)

diff --git a/src/network/core/tcp.h b/src/network/core/tcp.h
index b90ce0232c..624555649d 100644
--- a/src/network/core/tcp.h
+++ b/src/network/core/tcp.h
@@ -15,8 +15,9 @@
 #include "address.h"
 #include "packet.h"
 
-#include <chrono>
 #include <atomic>
+#include <chrono>
+#include <map>
 
 /** The states of sending the packets. */
 enum SendPacketsState {
@@ -66,6 +67,7 @@ class TCPConnecter {
 private:
 	addrinfo *ai = nullptr;                             ///< getaddrinfo() allocated linked-list of resolved addresses.
 	std::vector<addrinfo *> addresses;                  ///< Addresses we can connect to.
+	std::map<SOCKET, NetworkAddress> sock_to_address;   ///< Mapping of a socket to the real address it is connecting to. USed for DEBUG statements.
 	size_t current_address = 0;                         ///< Current index in addresses we are trying.
 
 	std::vector<SOCKET> sockets;                        ///< Pending connect() attempts.
diff --git a/src/network/core/tcp_connect.cpp b/src/network/core/tcp_connect.cpp
index cca9f09b71..a1e369295a 100644
--- a/src/network/core/tcp_connect.cpp
+++ b/src/network/core/tcp_connect.cpp
@@ -40,8 +40,10 @@ TCPConnecter::TCPConnecter(const std::string &connection_string, uint16 default_
 TCPConnecter::~TCPConnecter()
 {
 	for (const auto &socket : this->sockets) {
-		close(socket);
+		closesocket(socket);
 	}
+	this->sockets.clear();
+	this->sock_to_address.clear();
 
 	freeaddrinfo(this->ai);
 }
@@ -72,6 +74,7 @@ void TCPConnecter::Connect(addrinfo *address)
 		return;
 	}
 
+	this->sock_to_address[sock] = network_address;
 	this->sockets.push_back(sock);
 }
 
@@ -245,6 +248,9 @@ bool TCPConnecter::CheckActivity()
 		for (const auto &socket : this->sockets) {
 			closesocket(socket);
 		}
+		this->sockets.clear();
+		this->sock_to_address.clear();
+
 		this->OnFailure();
 		return true;
 	}
@@ -253,8 +259,9 @@ bool TCPConnecter::CheckActivity()
 	for (auto it = this->sockets.begin(); it != this->sockets.end(); /* nothing */) {
 		NetworkError socket_error = GetSocketError(*it);
 		if (socket_error.HasError()) {
-			DEBUG(net, 1, "Could not connect to %s: %s", NetworkAddress::GetPeerName(*it).c_str(), socket_error.AsString());
+			DEBUG(net, 1, "Could not connect to %s: %s", this->sock_to_address[*it].GetAddressAsString().c_str(), socket_error.AsString());
 			closesocket(*it);
+			this->sock_to_address.erase(*it);
 			it = this->sockets.erase(it);
 		} else {
 			it++;
@@ -280,6 +287,7 @@ bool TCPConnecter::CheckActivity()
 		} else {
 			closesocket(*it);
 		}
+		this->sock_to_address.erase(*it);
 		it = this->sockets.erase(it);
 	}
 	assert(connected_socket != INVALID_SOCKET);