package dns import ( "v2ray.com/core/common" "v2ray.com/core/common/net" "v2ray.com/core/common/strmatcher" ) type StaticHosts struct { ips map[uint32][]net.IP matchers *strmatcher.MatcherGroup } var typeMap = map[Config_HostMapping_Type]strmatcher.Type{ Config_HostMapping_Full: strmatcher.Full, Config_HostMapping_SubDomain: strmatcher.Domain, } func NewStaticHosts(hosts []*Config_HostMapping, legacy map[string]*net.IPOrDomain) (*StaticHosts, error) { g := strmatcher.NewMatcherGroup() sh := &StaticHosts{ ips: make(map[uint32][]net.IP), matchers: g, } if legacy != nil { for domain, ip := range legacy { matcher, err := strmatcher.Full.New(domain) common.Must(err) id := g.Add(matcher) address := ip.AsAddress() if address.Family().IsDomain() { return nil, newError("ignoring domain address in static hosts: ", address.Domain()).AtWarning() } sh.ips[id] = []net.IP{address.IP()} } } for _, mapping := range hosts { strMType, f := typeMap[mapping.Type] if !f { return nil, newError("unknown mapping type", mapping.Type).AtWarning() } matcher, err := strMType.New(mapping.Domain) if err != nil { return nil, newError("failed to create domain matcher").Base(err) } id := g.Add(matcher) ips := make([]net.IP, len(mapping.Ip)) for idx, ip := range mapping.Ip { ips[idx] = net.IP(ip) } sh.ips[id] = ips } return sh, nil } func (h *StaticHosts) LookupIP(domain string) []net.IP { id := h.matchers.Match(domain) if id == 0 { return nil } return h.ips[id] }