diff options
Diffstat (limited to 'src/net/lookup.go')
| -rw-r--r-- | src/net/lookup.go | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/net/lookup.go b/src/net/lookup.go index fe573b8a27..e10c71ae75 100644 --- a/src/net/lookup.go +++ b/src/net/lookup.go @@ -8,6 +8,7 @@ import ( "context" "internal/nettrace" "internal/singleflight" + "net/netip" "sync" ) @@ -232,6 +233,28 @@ func (r *Resolver) LookupIP(ctx context.Context, network, host string) ([]IP, er return ips, nil } +// LookupNetIP looks up host using the local resolver. +// It returns a slice of that host's IP addresses of the type specified by +// network. +// The network must be one of "ip", "ip4" or "ip6". +func (r *Resolver) LookupNetIP(ctx context.Context, network, host string) ([]netip.Addr, error) { + // TODO(bradfitz): make this efficient, making the internal net package + // type throughout be netip.Addr and only converting to the net.IP slice + // version at the edge. But for now (2021-10-20), this is a wrapper around + // the old way. + ips, err := r.LookupIP(ctx, network, host) + if err != nil { + return nil, err + } + ret := make([]netip.Addr, 0, len(ips)) + for _, ip := range ips { + if a, ok := netip.AddrFromSlice(ip); ok { + ret = append(ret, a) + } + } + return ret, nil +} + // onlyValuesCtx is a context that uses an underlying context // for value lookup if the underlying context hasn't yet expired. type onlyValuesCtx struct { |