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Custom LookupIPAddr function #699

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merged 4 commits into from
Nov 25, 2019
Merged

Custom LookupIPAddr function #699

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3e93a3d
Custom LookupIPAddr function
Nov 19, 2019
ac6e293
exact func name in comment
Nov 19, 2019
f277ae8
use interface instead of pointer
Nov 25, 2019
36fde04
auto typing
Nov 25, 2019
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10 changes: 7 additions & 3 deletions tcpdialer.go
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Original file line number Diff line number Diff line change
Expand Up @@ -120,6 +120,10 @@ var (
defaultDialer = &TCPDialer{Concurrency: 1000}
)

type Resolver interface {
LookupIPAddr(context.Context, string) (names []net.IPAddr, err error)
}

// TCPDialer contains options to control a group of Dial calls.
type TCPDialer struct {
// Concurrency controls the maximum number of concurrent Dails
Expand All @@ -141,7 +145,7 @@ type TCPDialer struct {
// },
// },
// }
Resolver *net.Resolver
Resolver Resolver

tcpAddrsLock sync.Mutex
tcpAddrsMap map[string]*tcpAddrEntry
Expand Down Expand Up @@ -426,7 +430,7 @@ func (d *TCPDialer) getTCPAddrs(addr string, dualStack bool) ([]net.TCPAddr, uin
return e.addrs, idx, nil
}

func resolveTCPAddrs(addr string, dualStack bool, resolver *net.Resolver) ([]net.TCPAddr, error) {
func resolveTCPAddrs(addr string, dualStack bool, resolver Resolver) ([]net.TCPAddr, error) {
host, portS, err := net.SplitHostPort(addr)
if err != nil {
return nil, err
Expand All @@ -439,7 +443,7 @@ func resolveTCPAddrs(addr string, dualStack bool, resolver *net.Resolver) ([]net
if resolver == nil {
resolver = net.DefaultResolver
}

ctx := context.Background()
ipaddrs, err := resolver.LookupIPAddr(ctx, host)
if err != nil {
Expand Down