/
net.go
110 lines (96 loc) · 2.32 KB
/
net.go
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package utils
import (
"fmt"
"net"
"strings"
"github.com/turbot/steampipe-plugin-sdk/v5/sperr"
)
func GetFirstListenAddress(listenAddresses []string) string {
listenAddress := strings.TrimSpace(listenAddresses[0])
if listenAddress == "*" {
listenAddress = "127.0.0.1"
}
return listenAddress
}
func ListenAddressesContainsOneOfAddresses(listenAddresses []string, addresses []string) bool {
for i := range listenAddresses {
listenAddress := strings.TrimSpace(listenAddresses[i])
for j := range addresses {
if addresses[j] == listenAddress {
return true
}
}
}
return false
}
func LocalPublicAddresses() ([]string, error) {
addresses := []string{}
ifaces, err := net.Interfaces()
if err != nil {
return nil, err
}
for _, i := range ifaces {
addrs, err := i.Addrs()
if err != nil {
continue
}
for _, a := range addrs {
switch v := a.(type) {
case *net.IPNet:
isToInclude := v.IP.IsGlobalUnicast() && ((v.IP.To4() != nil) || (v.IP.To16() != nil))
if isToInclude {
addresses = append(addresses, v.IP.String())
}
}
}
}
return addresses, nil
}
func LocalLoopbackAddresses() ([]string, error) {
addresses := []string{}
ifaces, err := net.Interfaces()
if err != nil {
return nil, err
}
for _, i := range ifaces {
addrs, err := i.Addrs()
if err != nil {
continue
}
for _, a := range addrs {
switch v := a.(type) {
case *net.IPNet:
isToInclude := v.IP.IsLoopback() && ((v.IP.To4() != nil) || (v.IP.To16() != nil))
if isToInclude {
addresses = append(addresses, v.IP.String())
}
}
}
}
return addresses, nil
}
func IsPortBindable(host string, port int) error {
addr := net.JoinHostPort(host, fmt.Sprintf("%d", port))
ln, err := net.Listen("tcp", addr)
if err != nil {
// Port is likely in use or unavailable.
return sperr.WrapWithMessage(err, "port %s:%d is already in use", host, port)
}
// Close the listener and return the port as available.
ln.Close()
return nil
}
func GetNextFreePort() (int, error) {
LogTime("utils.GetNextFreePort start")
defer LogTime("utils.GetNextFreePort end")
listener, err := net.Listen("tcp", "127.0.0.1:0")
if err != nil {
return -1, err
}
defer listener.Close()
addr, ok := listener.Addr().(*net.TCPAddr)
if !ok {
return -1, fmt.Errorf("count not retrieve port")
}
return addr.Port, nil
}