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|
//go:build linux
// +build linux
package sys
import (
"bytes"
"fmt"
"io"
"os"
)
func getLinesNum(filename string) (int, error) {
file, err := os.Open(filename)
if err != nil {
return 0, err
}
defer file.Close()
sum := 0
buf := make([]byte, 8192)
for {
n, err := file.Read(buf)
var buffPosition int
for {
i := bytes.IndexByte(buf[buffPosition:n], '\n')
if i < 0 {
break
}
buffPosition += i + 1
sum++
}
if err == io.EOF {
break
} else if err != nil {
return 0, err
}
}
return sum, nil
}
func GetTCPCount() (int, error) {
root := HostProc()
tcp4, err := getLinesNum(fmt.Sprintf("%v/net/tcp", root))
if err != nil {
return 0, err
}
tcp6, err := getLinesNum(fmt.Sprintf("%v/net/tcp6", root))
if err != nil {
return 0, err
}
return tcp4 + tcp6, nil
}
func GetUDPCount() (int, error) {
root := HostProc()
udp4, err := getLinesNum(fmt.Sprintf("%v/net/udp", root))
if err != nil {
return 0, err
}
udp6, err := getLinesNum(fmt.Sprintf("%v/net/udp6", root))
if err != nil {
return 0, err
}
return udp4 + udp6, nil
}
|
