From f2b3948b398c9796a9f5ec02022a24514077f469 Mon Sep 17 00:00:00 2001
From: Cthulhu-throwaway <96153783+Cthulhu-throwaway@users.noreply.github.com>
Date: Sun, 26 Jun 2022 16:38:52 -0300
Subject: [PATCH] (UPnP) Attempt support for remaining platforms (#14107)

---
 libretro-common/include/net/net_compat.h |  1 +
 tasks/task_netplay_nat_traversal.c       | 27 ++++++++++++++++++++++--
 2 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/libretro-common/include/net/net_compat.h b/libretro-common/include/net/net_compat.h
index 11f2494524..591f4cedbd 100644
--- a/libretro-common/include/net/net_compat.h
+++ b/libretro-common/include/net/net_compat.h
@@ -133,6 +133,7 @@
 #define socklen_t unsigned int
 
 #define socket(a,b,c) sceNetSocket("unknown",a,b,c)
+#define getsockname sceNetGetsockname
 #define getsockopt sceNetGetsockopt
 #define setsockopt sceNetSetsockopt
 #define bind sceNetBind
diff --git a/tasks/task_netplay_nat_traversal.c b/tasks/task_netplay_nat_traversal.c
index c8ab7eaac7..bb0a401693 100644
--- a/tasks/task_netplay_nat_traversal.c
+++ b/tasks/task_netplay_nat_traversal.c
@@ -39,8 +39,6 @@ static bool find_local_address(struct natt_device *device,
 {
    bool ret = false;
 
-/* TODO/FIXME: Find a way to get the network's interface on
-   HAVE_SOCKET_LEGACY platforms */
 #if !defined(HAVE_SOCKET_LEGACY) || defined(GEKKO)
    struct net_ifinfo interfaces = {0};
    struct addrinfo **addrs      = NULL;
@@ -135,6 +133,31 @@ done:
    free(scores);
    free(addrs);
    net_ifinfo_free(&interfaces);
+#else
+   int dummy_fd = socket_create("dummy",
+      SOCKET_DOMAIN_INET, SOCKET_TYPE_DATAGRAM, SOCKET_PROTOCOL_UDP);
+
+   if (dummy_fd >= 0)
+   {
+      struct sockaddr_in addr    = {0};
+      socklen_t          addrlen = sizeof(addr);
+
+      if (!connect(dummy_fd, (struct sockaddr*)&device->addr,
+               sizeof(device->addr)) &&
+            !getsockname(dummy_fd, (struct sockaddr*)&addr, &addrlen))
+      {
+         /* Make sure this is not "0.0.0.0". */
+         if (addr.sin_addr.s_addr)
+         {
+            /* Copy the address to our request. */
+            memcpy(&request->addr.sin_addr, &addr.sin_addr,
+               sizeof(request->addr.sin_addr));
+            ret = true;
+         }
+      }
+
+      socket_close(dummy_fd);
+   }
 #endif
 
    return ret;