Bug 1823358 - Add new network.trr.ohttp.uri pref r=keeler,necko-reviewers,jesup

Differential Revision: https://phabricator.services.mozilla.com/D172988

modules/libpref/init/StaticPrefList.yaml

@@ -12066,6 +12066,12 @@
   value: ""
   mirror: never
 
+# The URI used for the target DoH server when network.trr.use_ohttp is true
+- name: network.trr.ohttp.uri
+  type: String
+  value: ""
+  mirror: never
+
 # Allow the network changed event to get sent when a network topology or setup
 # change is noticed while running.
 - name: network.notify.changed

netwerk/dns/TRRService.cpp

@@ -216,6 +216,11 @@ void TRRService::SetDetectedTrrURI(const nsACString& aURI) {
     return;
   }
 
+  if (StaticPrefs::network_trr_use_ohttp()) {
+    LOG(("No autodetection when using OHTTP"));
+    return;
+  }
+
   mURISetByDetection = MaybeSetPrivateURI(aURI);
 }
 
@@ -360,7 +365,7 @@ nsresult TRRService::ReadPrefs(const char* name) {
   }
   if (!name || !strcmp(name, TRR_PREF("uri")) ||
       !strcmp(name, TRR_PREF("default_provider_uri")) ||
-      !strcmp(name, kRolloutURIPref)) {
+      !strcmp(name, kRolloutURIPref) || !strcmp(name, TRR_PREF("ohttp.uri"))) {
     OnTRRURIChange();
   }
   if (!name || !strcmp(name, TRR_PREF("credentials"))) {

netwerk/dns/TRRServiceBase.cpp

@@ -91,6 +91,11 @@ void TRRServiceBase::ProcessURITemplate(nsACString& aURI) {
 void TRRServiceBase::CheckURIPrefs() {
   mURISetByDetection = false;
 
+  if (StaticPrefs::network_trr_use_ohttp() && !mOHTTPURIPref.IsEmpty()) {
+    MaybeSetPrivateURI(mOHTTPURIPref);
+    return;
+  }
+
   // The user has set a custom URI so it takes precedence.
   if (!mURIPref.IsEmpty()) {
     MaybeSetPrivateURI(mURIPref);
@@ -163,6 +168,7 @@ void TRRServiceBase::OnTRRURIChange() {
   Preferences::GetCString("network.trr.uri", mURIPref);
   Preferences::GetCString(kRolloutURIPref, mRolloutURIPref);
   Preferences::GetCString("network.trr.default_provider_uri", mDefaultURIPref);
+  Preferences::GetCString("network.trr.ohttp.uri", mOHTTPURIPref);
 
   CheckURIPrefs();
 }

netwerk/dns/TRRServiceBase.h

@@ -75,6 +75,7 @@ class TRRServiceBase : public nsIProxyConfigChangedCallback {
   nsCString mURIPref;
   nsCString mRolloutURIPref;
   nsCString mDefaultURIPref;
+  nsCString mOHTTPURIPref;
 
   Atomic<nsIDNSService::ResolverMode, Relaxed> mMode{
       nsIDNSService::MODE_NATIVEONLY};

netwerk/dns/TRRServiceParent.cpp

@@ -161,7 +161,8 @@ void TRRServiceParent::PrefsChanged(const char* aName, void* aSelf) {
 void TRRServiceParent::prefsChanged(const char* aName) {
   if (!aName || !strcmp(aName, "network.trr.uri") ||
       !strcmp(aName, "network.trr.default_provider_uri") ||
-      !strcmp(aName, kRolloutURIPref)) {
+      !strcmp(aName, kRolloutURIPref) ||
+      !strcmp(aName, "network.trr.ohttp.uri")) {
     OnTRRURIChange();
   }
 

netwerk/test/unit/test_dooh.js

@@ -89,6 +89,7 @@ async function forwardToTRR(request, response) {
 
 add_setup(async function setup() {
   h2Port = trr_test_setup();
+  runningOHTTPTests = true;
 
   if (mozinfo.socketprocess_networking) {
     Services.dns; // Needed to trigger socket process.
@@ -123,6 +124,7 @@ add_setup(async function setup() {
     Services.prefs.clearUserPref("network.trr.use_ohttp");
     Services.prefs.clearUserPref("network.trr.ohttp.config_uri");
     Services.prefs.clearUserPref("network.trr.ohttp.relay_uri");
+    Services.prefs.clearUserPref("network.trr.ohttp.uri");
     await new Promise((resolve, reject) => {
       httpServer.stop(resolve);
     });

netwerk/test/unit/trr_common.js

@@ -39,6 +39,7 @@ async function SetParentalControlEnabled(aEnabled) {
 }
 
 let runningODoHTests = false;
+let runningOHTTPTests = false;
 let h2Port;
 
 function setModeAndURIForODoH(mode, path) {
@@ -50,8 +51,25 @@ function setModeAndURIForODoH(mode, path) {
   Services.prefs.setCharPref("network.trr.odoh.target_path", `${path}`);
 }
 
+function setModeAndURIForOHTTP(mode, path, domain) {
+  Services.prefs.setIntPref("network.trr.mode", mode);
+  if (domain) {
+    Services.prefs.setCharPref(
+      "network.trr.ohttp.uri",
+      `https://${domain}:${h2Port}/${path}`
+    );
+  } else {
+    Services.prefs.setCharPref(
+      "network.trr.ohttp.uri",
+      `https://${TRR_Domain}:${h2Port}/${path}`
+    );
+  }
+}
+
 function setModeAndURI(mode, path, domain) {
-  if (runningODoHTests) {
+  if (runningOHTTPTests) {
+    setModeAndURIForOHTTP(mode, path, domain);
+  } else if (runningODoHTests) {
     setModeAndURIForODoH(mode, path);
   } else {
     Services.prefs.setIntPref("network.trr.mode", mode);