From b73e4173a3c1e69e02ad6b4e3b43e425e57a5be9 Mon Sep 17 00:00:00 2001
From: MHSanaei <mc.sanaei@gmail.com>
Date: Thu, 9 Feb 2023 22:48:06 +0330
Subject: 3x-ui

---
 util/sys/a.s           |  0
 util/sys/psutil.go     |  8 ++++++
 util/sys/sys_darwin.go | 23 +++++++++++++++++
 util/sys/sys_linux.go  | 70 ++++++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 101 insertions(+)
 create mode 100644 util/sys/a.s
 create mode 100644 util/sys/psutil.go
 create mode 100644 util/sys/sys_darwin.go
 create mode 100644 util/sys/sys_linux.go

(limited to 'util/sys')

diff --git a/util/sys/a.s b/util/sys/a.s
new file mode 100644
index 00000000..e69de29b
diff --git a/util/sys/psutil.go b/util/sys/psutil.go
new file mode 100644
index 00000000..645f839a
--- /dev/null
+++ b/util/sys/psutil.go
@@ -0,0 +1,8 @@
+package sys
+
+import (
+	_ "unsafe"
+)
+
+//go:linkname HostProc github.com/shirou/gopsutil/internal/common.HostProc
+func HostProc(combineWith ...string) string
diff --git a/util/sys/sys_darwin.go b/util/sys/sys_darwin.go
new file mode 100644
index 00000000..d61a38a2
--- /dev/null
+++ b/util/sys/sys_darwin.go
@@ -0,0 +1,23 @@
+// +build darwin
+
+package sys
+
+import (
+	"github.com/shirou/gopsutil/net"
+)
+
+func GetTCPCount() (int, error) {
+	stats, err := net.Connections("tcp")
+	if err != nil {
+		return 0, err
+	}
+	return len(stats), nil
+}
+
+func GetUDPCount() (int, error) {
+	stats, err := net.Connections("udp")
+	if err != nil {
+		return 0, err
+	}
+	return len(stats), nil
+}
diff --git a/util/sys/sys_linux.go b/util/sys/sys_linux.go
new file mode 100644
index 00000000..843d9b00
--- /dev/null
+++ b/util/sys/sys_linux.go
@@ -0,0 +1,70 @@
+// +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')
+			if i < 0 || n == buffPosition {
+				break
+			}
+			buffPosition += i + 1
+			sum++
+		}
+
+		if err == io.EOF {
+			return sum, nil
+		} else if err != nil {
+			return sum, err
+		}
+	}
+}
+
+func GetTCPCount() (int, error) {
+	root := HostProc()
+
+	tcp4, err := getLinesNum(fmt.Sprintf("%v/net/tcp", root))
+	if err != nil {
+		return tcp4, err
+	}
+	tcp6, err := getLinesNum(fmt.Sprintf("%v/net/tcp6", root))
+	if err != nil {
+		return tcp4 + tcp6, nil
+	}
+
+	return tcp4 + tcp6, nil
+}
+
+func GetUDPCount() (int, error) {
+	root := HostProc()
+
+	udp4, err := getLinesNum(fmt.Sprintf("%v/net/udp", root))
+	if err != nil {
+		return udp4, err
+	}
+	udp6, err := getLinesNum(fmt.Sprintf("%v/net/udp6", root))
+	if err != nil {
+		return udp4 + udp6, nil
+	}
+
+	return udp4 + udp6, nil
+}
-- 
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