68e2f99062
This introduces support for looking up IP addresses using local DNS resolver. Function will return a list of all IP addresses associated with hostname. Further processing can be achieved using supported list template functions.
34 lines
677 B
Go
34 lines
677 B
Go
// This file contains the implementation of a template function for retrieving IP addresses from DNS
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package templater
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import (
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"fmt"
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"github.com/polydawn/meep"
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"net"
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"os"
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)
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type DNSError struct {
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meep.TraitAutodescribing
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meep.TraitCausable
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Output string
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}
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func GetIPsFromDNS(host string) ([]interface{}, error) {
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fmt.Fprintf(os.Stderr, "Attempting to look up IP for %s in DNS\n", host)
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ips, err := net.LookupIP(host)
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if err != nil {
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return nil, meep.New(
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&DNSError{Output: "IP address lookup failed"},
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meep.Cause(err),
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)
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}
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var result []interface{} = make([]interface{}, len(ips))
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for i, ip := range ips {
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result[i] = ip
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}
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return result, nil
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}
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