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dns: Fix search domain expansion

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DHCP option 119/15 and resolved link domains are not rooted, so appending
them to the query name produced a non-FQDN name, failing to pack with
"domain must be fully qualified".
This commit is contained in:
世界
2026-07-25 08:14:59 +08:00
parent 67a600dbfb
commit 397fb4d20a
2 changed files with 11 additions and 4 deletions
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9
dns/transport/dhcp/dhcp.go
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@@ -296,9 +296,14 @@ func (t *Transport) fetchServersResponse(iface *control.Interface, packetConn ne
func (t *Transport) recreateServers(iface *control.Interface, dhcpPacket *dhcpv4.DHCPv4) error {
searchList := dhcpPacket.DomainSearch()
if searchList != nil && len(searchList.Labels) > 0 {
t.search = searchList.Labels
t.search = common.Filter(common.Map(searchList.Labels, mDNS.Fqdn), func(it string) bool {
return it != "."
})
} else if dhcpPacket.DomainName() != "" {
t.search = []string{dhcpPacket.DomainName()}
domainName := mDNS.Fqdn(dhcpPacket.DomainName())
if domainName != "." {
t.search = []string{domainName}
}
}
serverAddrs := common.Map(dhcpPacket.DNS(), func(it net.IP) M.Socksaddr {
return M.SocksaddrFrom(M.AddrFromIP(it), 53)