def pkt_retransmits(request, src_node, dst_node):
#print 'Pkt retransmits'
try:
d = request.session.get(request.session.session_key)
if d is None:
raise Exception, INVALID_SESSION_MSG
if NS_TRACEFILE_KEY in d:
#print 'Trace file key found'
if NS_TRACEFILE_MODE in d:
#print 'Trace file format found (', d[NS_TRACEFILE_MODE], ')'
# Create a TraceAnalyzer object
ta = TraceAnalyzer(d[NS_TRACEFILE_KEY], d[NS_TRACEFILE_MODE])
retransmits = ta.get_packet_retransmissions(src_node, dst_node)
label = 'Packet retransmission count between %s-%s' % (src_node, dst_node,)
retransmits = {
'data': retransmits,
'label': label,
}
#print retransmits
return HttpResponse(json.dumps(retransmits))
else:
raise KeyError, 'Trace file mode not set!'
else:
raise KeyError, 'Wrong key!!!'
except KeyError, ke:
#print str(ke)
mesg = str(ke)
error = {'error' : mesg}
return HttpResponse(json.dumps(error))
def analyze_trace_file(trace_file_name, session_key, timestamp, metrics):
metrics_dir_path = '/'.join( [globals.NS2_SCRIPT_STORAGE_PATH, 'batch', session_key, timestamp, 'metrics',] )
try:
os.makedirs( metrics_dir_path )
#print 'Created dir', metrics_dir_path
try:
tr_file = open(trace_file_name, 'r')
#print 'Analyzing trace file', trace_file_name
metrics = json.loads( metrics )
#print metrics
for a_metric in metrics:
a_metric = json.loads( a_metric )
if a_metric['name'] == "bytes-rcvd":
# Sample: {"name":"bytes-rcvd","parameters":[66,"MAC|RTR|"],"mode":"Wired"}
ta = TraceAnalyzer( trace_file_name, a_metric['mode'] )
layers = a_metric['parameters'][1].strip()
if len(layers) > 0:
layers = [ l.strip() for l in a_metric['parameters'][1].split('|') if l.strip() != '' ]
else:
layers = None
#print layers
bytes_rcvd = ta.get_cumulative_bytes_received_for_node_at_layers(a_metric['parameters'][0], layers)
#print 'bytes_rcvd', len(bytes_rcvd)
xvals = []
yvals = []
for entry in bytes_rcvd:
xvals.append(entry[0])
yvals.append(entry[1])
image_file_name = '-'.join( [ 'bytes_rcvd', str(a_metric['parameters'][0]), a_metric['parameters'][1].replace('|', '_') ] )
image_file_name += '.png'
image_title = 'Bytes received by node %d (%s)' % ( a_metric['parameters'][0], a_metric['parameters'][1], )
plot_graph(xvals, yvals, 'Time (in seconds)', 'Kbits received', image_title, metrics_dir_path+'/'+image_file_name)
elif a_metric['name'] == "e2e-delay":
# Sample: {"name":"e2e-delay","parameters":[66,67,1],"mode":"Wired"}
ta = TraceAnalyzer( trace_file_name, a_metric['mode'] )
delay = ta.get_end2end_delay( a_metric['parameters'][0], a_metric['parameters'][1] )
xvals = []
yvals = []
for entry in delay:
xvals.append(entry[0])
yvals.append(entry[1])
image_file_name = '-'.join( [ 'e2e_delay', str(a_metric['parameters'][0]), str(a_metric['parameters'][1]), str(a_metric['parameters'][2]) ] )
image_file_name += '.png'
image_title = 'End-to-end delay between nodes %d and %d (scaling = %d)' % (a_metric['parameters'][0], a_metric['parameters'][1], a_metric['parameters'][2])
plot_graph(xvals, yvals, 'Packet sequence #', 'Delay', image_title, metrics_dir_path+'/'+image_file_name)
elif a_metric['name'] == "pkt-retransmission":
# Sample: {"name":"pkt-retransmission","parameters":[66,67],"mode":"Wired"}
ta = TraceAnalyzer( trace_file_name, a_metric['mode'] )
count = ta.get_packet_retransmissions( a_metric['parameters'][0], a_metric['parameters'][1] )
xvals = []
yvals = []
for entry in count:
xvals.append(entry[0])
yvals.append(entry[1])
image_file_name = '-'.join( [ 'pkt-retransmission', str(a_metric['parameters'][0]), str(a_metric['parameters'][1]), ] )
image_file_name += '.png'
image_title = 'Packet retransmissions between nodes %d and %d' % ( a_metric['parameters'][0], a_metric['parameters'][1], )
plot_graph(xvals, yvals, 'Packet sequence #', 'Retransmission count', image_title, metrics_dir_path+'/'+image_file_name)
elif a_metric['name'] == "hop-count":
# Sample: {"name":"hop-count","parameters":[66,0,67,0],"mode":"Wired"}
ta = TraceAnalyzer( trace_file_name, a_metric['mode'] )
count = ta.get_hop_count_pkt_seq_num( a_metric['parameters'][0], a_metric['parameters'][1], a_metric['parameters'][2], a_metric['parameters'][3] )
xvals = []
yvals = []
for entry in count:
xvals.append(entry[0])
yvals.append(entry[1])
image_file_name = '-'.join( [ 'pkt-retransmission', str(a_metric['parameters'][0]), str(a_metric['parameters'][1]), ] )
image_file_name += '.png'
image_title = 'Hop count between nodes %d:%d and %d:%d' % ( a_metric['parameters'][0], a_metric['parameters'][1], a_metric['parameters'][2], a_metric['parameters'][2], )
plot_graph(xvals, yvals, 'Packet sequence #', 'Hop count', image_title, metrics_dir_path+'/'+image_file_name)
except IOError, ioe:
output['error'] = str(ioe)
finally:
if tr_file:
tr_file.close()