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Improve local DNS server on darwin

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We mistakenly believed that `libresolv`'s `search` function worked correctly in NetworkExtension, but it seems only `getaddrinfo` does.

This commit changes the behavior of the `local` DNS server in NetworkExtension to prefer DHCP, falling back to `getaddrinfo` if DHCP servers are unavailable.

It's worth noting that `prefer_go` does not disable DHCP since it respects Dial Fields, but `getaddrinfo` does the opposite. The new behavior only applies to NetworkExtension, not to all scenarios (primarily command-line binaries) as it did previously.

In addition, this commit also improves the DHCP DNS server to use the same robust query logic as `local`.
This commit is contained in:
世界
2025-08-18 14:19:49 +08:00
parent 61cecf0b01
commit 07d9ec4f68
14 changed files with 433 additions and 476 deletions
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18
cmd/internal/build_libbox/main.go
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@@ -59,8 +59,8 @@ func init() {
if err != nil {
currentTag = "unknown"
}
sharedFlags = append(sharedFlags, "-ldflags", "-X github.com/sagernet/sing-box/constant.Version="+currentTag+" -s -w -buildid=")
debugFlags = append(debugFlags, "-ldflags", "-X github.com/sagernet/sing-box/constant.Version="+currentTag)
sharedFlags = append(sharedFlags, "-ldflags", "-X github.com/sagernet/sing-box/constant.Version="+currentTag+" -s -w -buildid= -checklinkname=0")
debugFlags = append(debugFlags, "-ldflags", "-X github.com/sagernet/sing-box/constant.Version="+currentTag+"-s -w -buildid= -checklinkname=0")
sharedTags = append(sharedTags, "with_gvisor", "with_quic", "with_wireguard", "with_utls", "with_clash_api", "with_conntrack")
darwinTags = append(darwinTags, "with_dhcp")
@@ -106,19 +106,17 @@ func buildAndroid() {
"-libname=box",
}
if !debugEnabled {
sharedFlags[3] = sharedFlags[3] + " -checklinkname=0"
args = append(args, sharedFlags...)
} else {
debugFlags[1] = debugFlags[1] + " -checklinkname=0"
args = append(args, debugFlags...)
}
tags := append(sharedTags, memcTags...)
if debugEnabled {
tags = append(tags, debugTags...)
}
if !debugEnabled {
args = append(args, sharedFlags...)
} else {
args = append(args, debugFlags...)
}
args = append(args, "-tags", strings.Join(tags, ","))
args = append(args, "./experimental/libbox")