use linphone's sofia_sip

the DNS is less buggy

default.nix

@@ -4,7 +4,43 @@
 { pkgs ? import <nixpkgs> {} }:
 let
   inherit (pkgs) stdenv;
-in stdenv.mkDerivation {
+  buildDebug = p: p.overrideAttrs (base: {
+    dontStrip = true;
+    env = (base.env or {}) // {
+      mesonBuildType = "debugoptimized";
+      NIX_CFLAGS_COMPILE = "-ggdb -Og -fno-omit-frame-pointer";
+      # mesonBuildType = "debug";
+      # NIX_CFLAGS_COMPILE = "-g -O0 -fno-omit-frame-pointer";
+    };
+  });
+  sofia_sip' = pkgs.sofia_sip.overrideAttrs (base: {
+    # sofia_sip linphone fork (2024-08-17)
+    # it seems to have less buggy DNS (sresolv)? the DNS actually reports errors to the consumer, instead of just never returning.
+    # more specifically, `outgoing_answer_a` always calls its continuation: that's actually in libsofia-sip-ua/nta/nta.c
+    src = with pkgs; fetchFromGitLab {
+      domain = "gitlab.linphone.org";
+      owner = "BC/public/external";
+      repo = "sofia-sip";
+      rev = "b924a57e8eeb24e8b9afc5fd0fb9b51d5993fe5d";
+      hash = "sha256-1VbKV+eAJ80IMlubNl7774B7QvLv4hE8SXANDSD9sRU=";
+    };
+  });
+  # sofia_sip' = pkgs.sofia_sip.overrideAttrs (base: {
+  #   # sofia_sip tip (2024-08-17)
+  #   src = with pkgs; fetchFromGitHub {
+  #     owner = "freeswitch";
+  #     repo = "sofia-sip";
+  #     rev = "0a50b8402fa5b6190a6c91c2e04dfe44a40de02c";
+  #     hash = "sha256-cxLk0IEwpoxeuVllnZ4/6JqzCd0GVeLyulFj0EYgnek=";
+  #   };
+  # });
+  # sofia_sip' = pkgs.sofia_sip.overrideAttrs (base: {
+  #   postPatch = (base.postPatch or "") + ''
+  #     substituteInPlace libsofia-sip-ua/sresolv/sofia-resolv/sres.h \
+  #       --replace 'SRES_MAX_RETRY_COUNT = 6' 'SRES_MAX_RETRY_COUNT = 0'
+  #   '';
+  # });
+in buildDebug (stdenv.mkDerivation {
   pname = "calls";
   version = "unstable";
   src = ./.;
@@ -41,13 +77,6 @@ in stdenv.mkDerivation {
     libpeas2
     libsecret
     modemmanager
-    sofia_sip
+    (buildDebug sofia_sip')
   ];
-
-  # build for debug:
-  dontStrip = true;
-  env.mesonBuildType = "debugoptimized";
-  env.NIX_CFLAGS_COMPILE = "-ggdb -Og -fno-omit-frame-pointer";
-  # env.mesonBuildType = "debug";
-  # env.NIX_CFLAGS_COMPILE = "-g -O0 -fno-omit-frame-pointer";
-}
+})