53 lines
1.2 KiB
Go
53 lines
1.2 KiB
Go
package fingerprint
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import (
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"fmt"
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"os/exec"
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"strconv"
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"strings"
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)
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// linkSpeed returns link speed in Mb/s, or 0 when unable to determine it.
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func (f *NetworkFingerprint) linkSpeed(device string) int {
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command := fmt.Sprintf("Get-NetAdapter -IncludeHidden | Where name -eq '%s' | Select -ExpandProperty LinkSpeed", device)
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path := "powershell.exe"
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outBytes, err := exec.Command(path, command).Output()
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if err != nil {
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f.logger.Warn("failed to detect link speed", "path", path, "command", command, "error", err)
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return 0
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}
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output := strings.TrimSpace(string(outBytes))
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return f.parseLinkSpeed(output)
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}
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func (f *NetworkFingerprint) parseLinkSpeed(commandOutput string) int {
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args := strings.Split(commandOutput, " ")
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if len(args) != 2 {
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f.logger.Warn("couldn't split LinkSpeed output", "output", commandOutput)
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return 0
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}
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unit := strings.Replace(args[1], "\r\n", "", -1)
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value, err := strconv.Atoi(args[0])
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if err != nil {
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f.logger.Warn("unable to parse LinkSpeed value", "value", commandOutput)
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return 0
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}
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switch unit {
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case "Mbps":
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return value
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case "Kbps":
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return value / 1000
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case "Gbps":
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return value * 1000
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case "bps":
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return value / 1000000
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}
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return 0
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}
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