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import yaml, os
import numpy as np
class YAMLPlatformFile:
def __init__(self, file_path):
self.file_path=file_path
self.default={
"breakpoints": [],
"breakpoints_every": None,
"debug": False,
"interferences": True,
"node_count": 0,
"implementations": [],
"interfaces": dict()
}
with open(file_path) as f:
self.platform = yaml.load(f, Loader=yaml.FullLoader)
##### General
if "general" in self.platform:
self.parse_general()
##### Nodes
if "nodes" in self.platform:
self.parse_nodes()
else:
self.parse_error("platform file has no nodes section")
##### Interfaces
if "interfaces" in self.platform:
self.parse_interfaces()
else:
self.parse_error("platform file has no interfaces section")
def parse_error(self,msg):
raise Exception("Fail to parse platform file \""+self.file_path+"\": "+msg)
def parse_link_range(self,r):
elt=r.split("-")
if len(elt) == 2:
return(range(int(elt[0]),int(elt[1])))
else:
return([int(elt[0])])
def parse_bw(self,bw):
for i,c in enumerate(bw):
if not c.isdigit() and c != ".":
break
number=float(bw[:i])
unit=bw[i:]
number=number*1000 if unit == "Mbps" else number
number=number*1000*8 if unit == "MBps" else number
number=number*100 if unit == "kbps" else number
number=number*100*8 if unit == "kBps" else number
number=number*8 if unit == "Bps" else number
return(number)
def parse_lat(self,lat):
for i,c in enumerate(lat):
if not c.isdigit() and c != ".":
break
number=float(lat[:i])
unit=lat[i:]
number=number*60 if unit in ["m","M"] else number
number=number*3600 if unit in ["h","H"] else number
number=number/1000 if unit in ["ms","MS"] else number
return(number)
def parse_link(self,link):
words=link.split()
if len(words) == 4:
return((
self.parse_link_range(words[0]),
self.parse_bw(words[1]),
self.parse_lat(words[2]),
self.parse_link_range(words[3])))
elif len(words) == 2:
return((
range(0,self.default["node_count"]),
self.parse_bw(words[0]),
self.parse_lat(words[1]),
range(0,self.default["node_count"])))
return(None)
def parse_txperf(self,txperf):
elts=txperf.split()
return((self.parse_bw(elts[0]),self.parse_lat(elts[1])))
def parse_interfaces(self):
interfaces=self.platform["interfaces"]
node_count=self.default["node_count"]
for i in interfaces:
is_wired=not interfaces[i]["wireless"]
links=list()
if type(interfaces[i]["links"]) == list:
for link in interfaces[i]["links"]:
links.append(self.parse_link(link))
else:
links.append(self.parse_link(interfaces[i]["links"]))
##### Create network matrix
BW=np.full((node_count,node_count),0)
LAT=np.full((node_count,node_count),0)
for link in links:
for n1 in link[0]:
for n2 in link[3]:
BW[n1][n2]=link[1]
LAT[n1][n2]=link[2]
##### Set txperfs for wireless interfaces
if not is_wired:
txperfs=interfaces[i]["txperfs"]
for node in range(0,node_count):
txperf=txperfs[0] if len(txperfs) == 1 else txperfs[node]
bw,lat=self.parse_txperf(txperf)
BW[node][node]=bw
LAT[node][node]=lat
self.default["interfaces"][i]={
"is_wired": is_wired,
"bandwidth": BW,
"latency": LAT
}
def parse_nodes(self):
nodes=self.platform["nodes"]
if "count" in nodes:
if not str(nodes["count"]).isnumeric():
self.parse_error("node count should be a number")
self.default["node_count"]=nodes["count"]
if "implementations" in nodes:
if type(nodes["implementations"]) != list:
self.parse_error("nodes implementations should be a list of file path")
for file in nodes["implementations"]:
if not os.path.exists(file):
self.parse_error("File "+file+ " not found")
path, extension = os.path.splitext(file)
if extension != ".py":
self.parse_error("File "+file+" must be a python file")
self.default["implementations"].append(path)
count = len(nodes["implementations"])
if count > 1 and count != self.default["node_count"]:
self.parse_error("If more than one implementation is specified, each node implementation should be provided ("+str(self.default["node_count"])+" in total)")
def parse_general(self):
general=self.platform["general"]
if "breakpoints" in general:
if type(general["breakpoints"]) != list:
self.parse_error("breakpoints should be a list of number")
self.default["breakpoints"]=general["breakpoints"]
if "breakpoints_every" in general:
if not str(general["breakpoints_every"]).isnumeric():
self.parse_error("breakpoints_every should be a number")
self.default["breakpoints_every"]=general["breakpoints_every"]
if "debug" in general:
if type(general["debug"]) != bool:
self.parse_error("debug should be on or off")
self.default["debug"]=general["debug"]
if "interferences" in general:
if type(general["interferences"]) != bool:
self.parse_error("interferences should be on or off")
self.default["interferences"]=general["interferences"]
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