Function parseNetIPSocketLine

net_ip_socket.go:163–248

parseNetIPSocketLine parses a single line, represented by a list of fields.

(fields []string, isUDP bool)

// parseNetIPSocketLine parses a single line, represented by a list of fields.
func parseNetIPSocketLine(fields []string, isUDP bool) (*netIPSocketLine, error) {
	line := &netIPSocketLine{}
	if len(fields) < 10 {
		return nil, fmt.Errorf(
			"%w: Less than 10 columns found %q",
			ErrFileParse,
			strings.Join(fields, " "),
		)
	}
	var err error // parse error

	// sl
	s := strings.Split(fields[0], ":")
	if len(s) != 2 {
		return nil, fmt.Errorf("%w: Unable to parse sl field in line %q", ErrFileParse, fields[0])
	}

	if line.Sl, err = strconv.ParseUint(s[0], 0, 64); err != nil {
		return nil, fmt.Errorf("%w: Unable to parse sl field in %q: %w", ErrFileParse, line.Sl, err)
	}
	// local_address
	l := strings.Split(fields[1], ":")
	if len(l) != 2 {
		return nil, fmt.Errorf("%w: Unable to parse local_address field in %q", ErrFileParse, fields[1])
	}
	if line.LocalAddr, err = parseIP(l[0]); err != nil {
		return nil, err
	}
	if line.LocalPort, err = strconv.ParseUint(l[1], 16, 64); err != nil {
		return nil, fmt.Errorf("%w: Unable to parse local_address port value line %q: %w", ErrFileParse, line.LocalPort, err)
	}

	// remote_address
	r := strings.Split(fields[2], ":")
	if len(r) != 2 {
		return nil, fmt.Errorf("%w: Unable to parse rem_address field in %q", ErrFileParse, fields[1])
	}
	if line.RemAddr, err = parseIP(r[0]); err != nil {
		return nil, err
	}
	if line.RemPort, err = strconv.ParseUint(r[1], 16, 64); err != nil {
		return nil, fmt.Errorf("%w: Cannot parse rem_address port value in %q: %w", ErrFileParse, line.RemPort, err)
	}

	// st
	if line.St, err = strconv.ParseUint(fields[3], 16, 64); err != nil {
		return nil, fmt.Errorf("%w: Cannot parse st value in %q: %w", ErrFileParse, line.St, err)
	}

	// tx_queue and rx_queue
	q := strings.Split(fields[4], ":")
	if len(q) != 2 {
		return nil, fmt.Errorf(
			"%w: Missing colon for tx/rx queues in socket line %q",
			ErrFileParse,
			fields[4],
		)
	}