def merge_cap_files (pcap_file_list, out_filename, delete_src = False):
exising_pcaps = [f for f in pcap_file_list if os.path.exists(f)]
if not exising_pcaps:
print('ERROR: DP cores did not produce output files!')
return
if len(exising_pcaps) != len(pcap_file_list):
print("WARNING: not all DP cores produced output files\n")
out_pkts = []
for src in exising_pcaps:
pkts = RawPcapReader(src)
out_pkts += pkts
if delete_src:
os.unlink(src)
# sort by timestamp
out_pkts = sorted(out_pkts, key = __ts_key)
writer = RawPcapWriter(out_filename, linktype = 1)
writer._write_header(None)
for pkt in out_pkts:
writer._write_packet(pkt[0], sec=pkt[1][0], usec=pkt[1][1], caplen=pkt[1][2], wirelen=None)
def _write_pcap_files(self, iface_pkts_map):
""" Writes the collected packets to their respective interfaces.
This is done by creating a pcap file with the corresponding name. """
for iface, pkts in iface_pkts_map.items():
direction = "in"
infile = self.filename(iface, direction)
# Linktype 1 the Ethernet Link Type, see also 'man pcap-linktype'
fp = RawPcapWriter(infile, linktype=1)
fp._write_header(None)
for pkt_data in pkts:
try:
fp._write_packet(pkt_data)
except ValueError:
report_err(self.outputs["stderr"], "Invalid packet data",
pkt_data)
return FAILURE
return SUCCESS
def merge_cap_files(pcap_file_list, out_filename, delete_src=False):
if not all([os.path.exists(f) for f in pcap_file_list]):
print("failed to merge cap file list...\nnot all files exist\n")
return
out_pkts = []
for src in pcap_file_list:
pkts = RawPcapReader(src)
out_pkts += pkts
if delete_src:
os.unlink(src)
# sort by timestamp
out_pkts = sorted(out_pkts, key=__ts_key)
writer = RawPcapWriter(out_filename, linktype=1)
writer._write_header(None)
for pkt in out_pkts:
writer._write_packet(pkt[0], sec=pkt[1][0],
usec=pkt[1][1], caplen=pkt[1][2], wirelen=None)
