Fixed pcap summary print of 802.11 frame

802.11 Packet Type and Packet Subtype is now correctly decoded

examples/common_components/pcap/src/pcap.c

@@ -175,10 +175,10 @@ esp_err_t pcap_print_summary(pcap_file_handle_t pcap, FILE *print_file)
         real_read = fread(packet_payload, payload_length, 1, pcap->file);
         ESP_GOTO_ON_FALSE(real_read == 1, ESP_FAIL, err, TAG, "read payload error");
         // print packet information
-        // currently only print info for 802.11
         if (file_header.link_type == PCAP_LINK_TYPE_802_11) {
-            fprintf(print_file, "Packet Type: %2x\n", (packet_payload[0] >> 4) & 0x03);
-            fprintf(print_file, "Packet Subtype: %2x\n", packet_payload[0] & 0x0F);
+            // Frame Control Field is coded as LSB first
+            fprintf(print_file, "Frame Type: %2x\n", (packet_payload[0] >> 2) & 0x03);
+            fprintf(print_file, "Frame Subtype: %2x\n", (packet_payload[0] >> 4) & 0x0F);
             fprintf(print_file, "Destination: ");
             for (int j = 0; j < 5; j++) {
                 fprintf(print_file, "%2x ", packet_payload[4 + j]);

examples/network/simple_sniffer/example_test.py

@@ -1,3 +1,5 @@
+# SPDX-FileCopyrightText: 2021 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: Apache-2.0
 from __future__ import unicode_literals
 
 import re
@@ -33,8 +35,8 @@ def test_examples_simple_sniffer(env, _):  # type: (Any, Any) -> None
         dut.expect(re.compile(r'Timestamp \(Microseconds\): [0-9]*'))
         dut.expect(re.compile(r'Capture Length: [0-9]*'))
         dut.expect(re.compile(r'Packet Length: [0-9]*'))
-        dut.expect(re.compile(r'Packet Type: .*'))
-        dut.expect(re.compile(r'Packet Subtype: .*'))
+        dut.expect(re.compile(r'Frame Type: .*'))
+        dut.expect(re.compile(r'Frame Subtype: .*'))
         dut.expect(re.compile(r'Destination: .*'))
         dut.expect(re.compile(r'Source: .*'))
     dut.expect('Pcap packet Number: 10')