102 lines
2.7 KiB
Go
102 lines
2.7 KiB
Go
package main
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import (
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"io/ioutil"
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"os"
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"path/filepath"
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"strconv"
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"strings"
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"go.wit.com/log"
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)
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func getProcessNameByPort(port int) string {
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// Convert port to hex string
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portHex := strconv.FormatInt(int64(port), 16)
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// Function to search /proc/net/tcp or /proc/net/udp
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searchProcNet := func(file string) string {
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data, err := ioutil.ReadFile(file)
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if err != nil {
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return ""
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}
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// log.Log(PROC, "searchProcNet() data:", string(data))
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lines := strings.Split(string(data), "\n")
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for _, line := range lines {
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fields := strings.Fields(line)
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log.Log(PROC, "searchProcNet() portHex:", portHex)
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if (len(fields) > 9) {
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log.Log(PROC, "searchProcNet() fields[9]", fields[9])
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}
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log.Log(PROC, "searchProcNet() lines:", line)
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if len(fields) > 1 {
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parts := strings.Split(fields[1], ":")
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if len(parts) > 1 {
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// Convert the hexadecimal string to an integer
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value, _ := strconv.ParseInt(parts[1], 16, 64)
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log.Log(PROC, "searchProcNet() value, port =", value, port, "parts[1] =", parts[1])
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if (port == int(value)) {
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log.Log(PROC, "searchProcNet() THIS IS THE LINE:", fields)
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return fields[9]
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}
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}
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}
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}
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return ""
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}
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// Search TCP and then UDP
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inode := searchProcNet("/proc/net/tcp")
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if inode == "" {
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inode = searchProcNet("/proc/net/udp")
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}
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log.Log(PROC, "searchProcNet() inode =", inode)
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// Search for process with the inode
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procs, _ := ioutil.ReadDir("/proc")
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for _, proc := range procs {
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if !proc.IsDir() {
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continue
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}
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fdPath := filepath.Join("/proc", proc.Name(), "fd")
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fds, err := ioutil.ReadDir(fdPath)
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if err != nil {
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continue // Process might have exited; skip it
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}
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for _, fd := range fds {
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fdLink, _ := os.Readlink(filepath.Join(fdPath, fd.Name()))
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var s string
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s = "socket:["+inode+"]"
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if strings.Contains(fdLink, "socket:[") {
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log.Log(PROC, "searchProcNet() fdLink has socket:", fdLink)
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log.Log(PROC, "searchProcNet() proc.Name() =", proc.Name(), "s =", s)
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}
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if strings.Contains(fdLink, "socket:[35452]") {
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log.Log(PROC, "searchProcNet() found proc.Name() =", proc.Name(), fdLink)
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return proc.Name()
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}
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if strings.Contains(fdLink, "socket:[35450]") {
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log.Log(PROC, "searchProcNet() found proc.Name() =", proc.Name(), fdLink)
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return proc.Name()
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}
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if strings.Contains(fdLink, "socket:[35440]") {
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log.Log(PROC, "searchProcNet() found proc.Name() =", proc.Name(), fdLink)
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return proc.Name()
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}
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if strings.Contains(fdLink, "socket:[21303]") {
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log.Log(PROC, "searchProcNet() found proc.Name() =", proc.Name(), fdLink)
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// return proc.Name()
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}
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if strings.Contains(fdLink, "socket:["+inode+"]") {
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return proc.Name()
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}
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}
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}
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return ""
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}
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