/
net.go
59 lines (50 loc) · 1.3 KB
/
net.go
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package utils
import (
"fmt"
"os/exec"
"strconv"
"strings"
"github.com/zenoss/glog"
)
// URL parses and handles URL typed options
type URL struct {
Host string
Port int
}
// Set converts a URL string to a URL object
func (u *URL) Set(value string) error {
parts := strings.Split(value, ":")
if len(parts) != 2 {
return fmt.Errorf("bad format: %s; must be formatted as HOST:PORT", value)
}
u.Host = parts[0]
if port, err := strconv.Atoi(parts[1]); err != nil {
return fmt.Errorf("port does not parse as an integer")
} else {
u.Port = port
}
return nil
}
func (u *URL) String() string {
return fmt.Sprintf("%s:%d", u.Host, u.Port)
}
// GetGateway returns the default gateway
func GetGateway(defaultRPCPort int) string {
cmd := exec.Command("ip", "route")
output, err := cmd.Output()
localhost := URL{"127.0.0.1", defaultRPCPort}
if err != nil {
glog.V(2).Info("Error checking gateway: ", err)
glog.V(1).Info("Could not get gateway using ", localhost.Host)
return localhost.String()
}
for _, line := range strings.Split(string(output), "\n") {
fields := strings.Fields(line)
if len(fields) > 2 && fields[0] == "default" {
endpoint := URL{fields[2], defaultRPCPort}
return endpoint.String()
}
}
glog.V(1).Info("No gateway found, using ", localhost.Host)
return localhost.String()
}