From 0c5166ac399e4d1c72d68926b1a6b72de09afef1 Mon Sep 17 00:00:00 2001
From: Benau <Benau@users.noreply.github.com>
Date: Mon, 19 Aug 2019 14:38:26 +0800
Subject: [PATCH] Add getaddrinfo_compat for workaround of an iOS 9 bug

---
 src/network/unix_ipv6.cpp | 73 +++++++++++++++++++++++++++++++++++----
 src/network/unix_ipv6.hpp |  4 +++
 2 files changed, 70 insertions(+), 7 deletions(-)

diff --git a/src/network/unix_ipv6.cpp b/src/network/unix_ipv6.cpp
index a62372db5..e60ea70fc 100644
--- a/src/network/unix_ipv6.cpp
+++ b/src/network/unix_ipv6.cpp
@@ -15,6 +15,72 @@
 //  along with this program; if not, write to the Free Software
 //  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 
+#ifdef WIN32
+#include "ws2tcpip.h"
+#else
+#include <arpa/inet.h>
+#include <err.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <sys/sysctl.h>
+#include <stdlib.h>
+#endif
+
+// ----------------------------------------------------------------------------
+/** Workaround of a bug in iOS 9 where port number is not written. */
+extern "C" int getaddrinfo_compat(const char* hostname,
+                                  const char* servname,
+                                  const struct addrinfo* hints,
+                                  struct addrinfo** res)
+{
+#ifdef IOS_STK
+    int err;
+    int numericPort;
+
+    // If we're given a service name and it's a numeric string,
+    // set `numericPort` to that, otherwise it ends up as 0.
+    numericPort = servname != NULL ? atoi(servname) : 0;
+
+    // Call `getaddrinfo` with our input parameters.
+    err = getaddrinfo(hostname, servname, hints, res);
+
+    // Post-process the results of `getaddrinfo` to work around
+    if ((err == 0) && (numericPort != 0))
+    {
+        for (const struct addrinfo* addr = *res; addr != NULL;
+             addr = addr->ai_next)
+        {
+            in_port_t* portPtr;
+            switch (addr->ai_family)
+            {
+                case AF_INET:
+                {
+                    portPtr = &((struct sockaddr_in*)addr->ai_addr)->sin_port;
+                }
+                break;
+                case AF_INET6:
+                {
+                    portPtr = &((struct sockaddr_in6*)addr->ai_addr)->sin6_port;
+                }
+                break;
+                default:
+                {
+                    portPtr = NULL;
+                }
+                break;
+            }
+            if ((portPtr != NULL) && (*portPtr == 0))
+            {
+                *portPtr = htons(numericPort);
+            }
+        }
+    }
+    return err;
+#else
+    return getaddrinfo(hostname, servname, hints, res);
+#endif
+}
+
 #ifndef ENABLE_IPV6
 #include "network/unix_ipv6.hpp"
 // ----------------------------------------------------------------------------
@@ -37,13 +103,6 @@ std::string getIPV6ReadableFromMappedAddress(const ENetAddress* ea)
 #include "utils/log.hpp"
 #include "utils/types.hpp"
 
-#include <arpa/inet.h>
-#include <err.h>
-#include <netdb.h>
-#include <stdlib.h>
-#include <sys/socket.h>
-#include <sys/sysctl.h>
-
 #include <algorithm>
 #include <utility>
 #include <vector>
diff --git a/src/network/unix_ipv6.hpp b/src/network/unix_ipv6.hpp
index 0203418ff..4903443b8 100644
--- a/src/network/unix_ipv6.hpp
+++ b/src/network/unix_ipv6.hpp
@@ -27,7 +27,11 @@ void unixInitialize();
 void removeMappedAddress(const ENetAddress* ea);
 void getIPV6FromMappedAddress(const ENetAddress* ea, struct sockaddr_in6* in6);
 void getMappedFromIPV6(const struct sockaddr_in6* in6, ENetAddress* ea);
+void addMappedAddress(const ENetAddress* ea, const struct sockaddr_in6* in6);
+int getaddrinfo_compat(const char* hostname, const char* servname,
+                       const struct addrinfo* hints, struct addrinfo** res);
 #ifdef __cplusplus
 }
 #endif
 std::string getIPV6ReadableFromMappedAddress(const ENetAddress* ea);
+std::string getIPV6ReadableFromIn6(const struct sockaddr_in6* in);