Add "dyndns" or DNS server lookup by domain name as requested by ablondel.

JSON updated.

Author: hrydgard

Core/HLE/sceNet.cpp

@@ -26,6 +26,7 @@
 #include "Common/Serialize/Serializer.h"
 #include "Common/Serialize/SerializeFuncs.h"
 #include "Common/Serialize/SerializeMap.h"
+#include "Common/System/OSD.h"
 #include "Common/Data/Format/JSONReader.h"
 #include "Core/HLE/HLE.h"
 #include "Core/HLE/FunctionWrappers.h"
@@ -208,8 +209,9 @@ bool LoadDNSForGameID(std::string_view gameID, InfraDNSConfig *dns) {
 		}
 
 		std::string name = game.getStringOr("name", "");
+		std::string dyn_dns = game.getStringOr("dyn_dns", dns->dns.c_str());
 		dns->dns = game.getStringOr("dns", dns->dns.c_str());
-
+		dns->dyn_dns = game.getStringOr("dyn_dns", "");
 		if (game.hasChild("domains", JSON_OBJECT)) {
 			const JsonGet domains = game.getDict("domains");
 			for (auto iter : domains.value_) {
@@ -712,9 +714,45 @@ static int sceNetInit(u32 poolSize, u32 calloutPri, u32 calloutStack, u32 netini
 	memset(&adhocSockets, 0, sizeof(adhocSockets));
 
 	if (g_Config.bInfrastructureAutoDNS) {
-		// Load the automatic DNS config.
+		// Load the automatic DNS config for this game - or the defaults.
 		std::string discID = g_paramSFO.GetDiscID();
 		LoadDNSForGameID(discID, &g_infraDNSConfig);
+
+		// If dyn_dns is non-empty, try to use it to replace the specified DNS.
+		// If fails, we just use the dns. TODO: Do this in the background somehow...
+		const auto &dns = g_infraDNSConfig.dns;
+		const auto &dyn_dns = g_infraDNSConfig.dyn_dns;
+		if (!dyn_dns.empty()) {
+			// Try to look it up in system DNS
+			INFO_LOG(Log::sceNet, "DynDNS requested, trying to resolve '%s'...", dyn_dns.c_str());
+			addrinfo *resolved = nullptr;
+			std::string err;
+			if (!net::DNSResolve(dyn_dns, "", &resolved, err)) {
+				ERROR_LOG(Log::sceNet, "Error resolving, falling back to '%s'", dns.c_str());
+			} else if (resolved) {
+				bool found = false;
+				for (auto ptr = resolved; ptr && !found; ptr = ptr->ai_next) {
+					switch (ptr->ai_family) {
+					case AF_INET:
+					{
+						char ipstr[256];
+						if (inet_ntop(ptr->ai_family, &(((struct sockaddr_in*)ptr->ai_addr)->sin_addr), ipstr, sizeof(ipstr)) != 0) {
+							INFO_LOG(Log::sceNet, "Successfully resolved '%s' to '%s', overriding DNS.", dyn_dns.c_str(), ipstr);
+							if (g_infraDNSConfig.dns != ipstr) {
+								WARN_LOG(Log::sceNet, "Replacing specified DNS IP %s with dyndns %s!", g_infraDNSConfig.dns.c_str(), ipstr);
+								g_infraDNSConfig.dns = ipstr;
+							} else {
+								INFO_LOG(Log::sceNet, "DynDNS: %s already up to date", g_infraDNSConfig.dns.c_str());
+							}
+							found = true;
+						}
+						break;
+					}
+					}
+				}
+				net::DNSResolveFree(resolved);
+			}
+		}
 	}
 
 	netInited = true;

Core/HLE/sceNet.h

@@ -140,6 +140,7 @@ enum class InfraGameState {
 struct InfraDNSConfig {
 	std::string gameName;
 	std::string dns;
+	std::string dyn_dns;
 	InfraGameState state;
 	std::map<std::string, std::string> fixedDNS;
 	int score;

assets/infra-dns.json

@@ -17,11 +17,10 @@
 				"group": "MOHH Revival",
 				"url": "https://mohh-revival.pages.dev/"
 			},
-			"credit": "AG ",
 			"dns": "86.223.243.173",
+			"dyn_dns": "ablondel.ddns.net",
 			"domains": {
 				"pspmoh07.ea.com": "86.223.243.173",
-				"pspmoh08.ea.com": "86.223.243.173",
 				"tos.ea.com": "86.223.243.173"
 			},
 			"score": 5,
@@ -40,9 +39,53 @@
 				"ULUS10141",
 				"NPJH50306"
 			],
-			"not_working_platforms": [
-				"Windows"
+		},
+		{
+			"name": "Medal of Honor 2",
+			"comment": {
+				"en_US": "Only the menu works!"
+			},
+			"revival_credits": {
+				"group": "MOHH Revival",
+				"url": "https://mohh-revival.pages.dev/"
+			},
+			"dns": "86.223.243.173",
+			"dyn_dns": "ablondel.ddns.net",
+			"domains": {
+				"pspmoh08.ea.com": "86.223.243.173",
+				"tos.ea.com": "86.223.243.173"
+			},
+			"score": 1,
+			"known_working_ids": [
+				"ULUS10310",
+				"ULES00955",
+				"ULES00956",
+				"ULES00988"
 			],
+			"not_working_ids": [
+				"ULJM05301",
+			]
+		},
+		{
+			"name": "Wipeout Pure",
+			"comment": {
+				"en_US": "Web browser only, no multiplayer"
+			},
+			"revival_credits": {
+				"group": "The AG Racing Foundation",
+				"url": "https://agracingfoundation.org/"
+			},
+			"dns": "145.239.30.230",
+			"domains": {
+				"hub.psnexus.net": "145.239.30.230",
+			},
+			"other_ids": [
+				"UCUS98612",
+				"UCJS10007",
+				"UCES00001",
+				"UCKS45008",
+				"NPJG00059"
+			]
 		},
 		{
 			"name": "Wipeout Pulse",
@@ -79,7 +122,7 @@
 			"known_working_ids": [
 				"UCES01250",
 				"UCUS98743",
-				"UCJS10104",
+				"UCJS10104"
 			],
 			"not_working_ids": [],
 			"other_ids": [