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hosts.go
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hosts.go
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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]
}