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Add ability to search for IP address by MAC address #4

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Add ability to search for IP address by MAC address #4

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d72349e
Update arp.go
shaworth Oct 7, 2018
7952c51
Merge pull request #1 from shaworth/shaworth-patch-1
shaworth Oct 7, 2018
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13 changes: 13 additions & 0 deletions arp.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@ package arp

import (
"time"
"errors"
)

type ArpTable map[string]string
Expand Down Expand Up @@ -47,3 +48,15 @@ func CacheUpdateCount() int {
func Search(ip string) string {
return arpCache.Search(ip)
}

// Search looks up the IP address by MAC address
// in the arp table
func SearchByMac(target string) (string, error) {
for ip, _ := range Table() {
m := Search(ip)
if(m == target) {
return ip, nil
}
}
return "", errors.New("Mac not found")
}