-Added PCAP header information.

applications/arts/commissioning/sc4/lab/20170421_iab_i_1GbE_bg/arts_unb1_sc4_pcap.py

@@ -39,6 +39,7 @@ Extra:
 import struct
 import sys
 from common import *
+import datetime
 
 def dumpfile_to_array(dumpfile, nof_packets):
     """
@@ -56,7 +57,7 @@ def dumpfile_to_array(dumpfile, nof_packets):
     append_channels = False
 
     for packet in range(nof_packets): # 960 channels = 15 integration periods of 64 channels.
-        pcap_pkt_hdr_raw = f.read(16)
+        pcap_hdr_raw = f.read(16)
         eth_hdr_raw = f.read(14)
         ip_hdr_raw = f.read(20)
         udp_hdr_raw = f.read(8)
@@ -65,6 +66,20 @@ def dumpfile_to_array(dumpfile, nof_packets):
 
         data_raw = f.read(6250)
 
+        ###########################################################################
+        # PCAP header: 4 little endian unsigned integers (32b)
+        ###########################################################################
+        pcap_hdr_struct = struct.unpack('<4I', pcap_hdr_raw)
+        pcap_hdr_words = CommonWords(0, 4)
+        for word_index,word in enumerate(reversed(pcap_hdr_struct)):
+            pcap_hdr_words[word_index] = word
+
+        timestamp_utc_pcap = str(datetime.datetime.fromtimestamp(pcap_hdr_words[3]))+'.'+str("%06d" %pcap_hdr_words[2])
+
+        print 'Packet', packet, '-', 'PCAP timestamp UTC          ', timestamp_utc_pcap
+        print 'Packet', packet, '-', 'PCAP pkt size: file (bytes) ', pcap_hdr_words[1]
+        print 'Packet', packet, '-', 'PCAP pkt size: wire (bytes) ', pcap_hdr_words[0]
+
         ###########################################################################
         # Ethernet header: 7 big endian unsigned shorts (16b)
         ###########################################################################