pyrox.dev
libslirp, darwin.linux-builder: fix DNS resolution using libslirp on MacOS (#398952)
-8
nixos/modules/profiles/nix-builder-vm.nix
-8
nixos/modules/profiles/nix-builder-vm.nix
···
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};
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};
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-
# DNS fails for QEMU user networking (SLiRP) on macOS. See:
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-
#
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-
# https://github.com/utmapp/UTM/issues/2353
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-
#
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# This works around that by using a public DNS server other than the DNS
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-
# server that QEMU provides (normally 10.0.2.3)
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-
networking.nameservers = [ "8.8.8.8" ];
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-
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# The linux builder is a lightweight VM for remote building; not evaluation.
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nix.channel.enable = false;
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+46
pkgs/by-name/li/libslirp/fix-dns-for-darwin.patch
+46
pkgs/by-name/li/libslirp/fix-dns-for-darwin.patch
···
···
1
+
From 735904142f95d0500c0eae6bf763e4ad24b6b9fd Mon Sep 17 00:00:00 2001
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From: Samuel Thibault <samuel.thibault@ens-lyon.org>
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Date: Wed, 26 Mar 2025 08:42:35 +0100
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Subject: [PATCH] apple: Fix getting IPv4 DNS server address when IPv4 and IPv4
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are interleaved
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When getting an IPv4 DNS server address, if libresolv returns
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IPv4
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IPv6
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IPv4
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IPv6
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+
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(or just IPv4 and IPv6)
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+
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we would still have found == 1 on the second iteration and thus take the
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IPv6 even if it's not the proper af. We can as well just completely ignore
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the non-matching af entries.
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Fixes #85
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---
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src/slirp.c | 7 +++++--
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1 file changed, 5 insertions(+), 2 deletions(-)
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+
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diff --git a/src/slirp.c b/src/slirp.c
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index bccee53..62a018a 100644
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--- a/src/slirp.c
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+++ b/src/slirp.c
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@@ -289,9 +289,12 @@ static int get_dns_addr_libresolv(int af, void *pdns_addr, void *cached_addr,
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found = 0;
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DEBUG_MISC("IP address of your DNS(s):");
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for (int i = 0; i < count; i++) {
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- if (af == servers[i].sin.sin_family) {
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- found++;
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+ if (af != servers[i].sin.sin_family) {
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+ continue;
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}
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+
+
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+ found++;
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+
+
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if (af == AF_INET) {
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addr = &servers[i].sin.sin_addr;
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} else { // af == AF_INET6
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+
--
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+
GitLab
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+
+6
pkgs/by-name/li/libslirp/package.nix
+6
pkgs/by-name/li/libslirp/package.nix
···
20
sha256 = "sha256-Eqdw6epFkLv4Dnw/s1pcKW0P70ApZwx/J2VkCwn50Ew=";
21
};
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+
patches = [
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+
# https://gitlab.freedesktop.org/slirp/libslirp/-/commit/735904142f95d0500c0eae6bf763e4ad24b6b9fd
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# Vendorized due to frequent instability of the upstream repository.
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+
./fix-dns-for-darwin.patch
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];
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+
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separateDebugInfo = true;
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nativeBuildInputs = [