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import yaml, os, importlib
import numpy as np
from .simulator import Simulator
class UnitsParser:
def node_range(r,limit):
if r == "all":
return(range(0,limit))
r=r.replace("@",str(limit-1))
elt=r.split("-")
if len(elt) == 2:
min = int(elt[0])
max = int(elt[1])
if min < 0 or max >= limit:
raise Exception("Outside of range limit [0-"+str(limit)+"]")
return(range(min,max+1))
else:
return(list(map(int, r.split(","))))
def bandwidth(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 latency(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)
class YAMLPlatformFile:
def __init__(self, file_path):
self.file_path=file_path
self.location=os.path.dirname(os.path.abspath(file_path))
self.default={
"breakpoints": [],
"breakpoints_every": None,
"breakpoints_file": None,
"breakpoints_callback": lambda s:None,
"debug": False,
"debug_file": "./esds.debug",
"interferences": True,
"node_count": 0,
"implementations": [],
"arguments": [],
"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.parsing_error("platform file has no nodes section")
##### Interfaces
if "interfaces" in self.platform:
self.parse_interfaces()
else:
self.parsing_error("platform file has no interfaces section")
##### Sanity checks
if None in self.default["implementations"]:
self.parsing_error("Some nodes do not have assigned implementation")
def parsing_error(self,msg):
raise Exception("Fail to parse platform file \""+self.file_path+"\": "+msg)
def parse_link(self,link):
words=link.split()
if len(words) == 4:
return((
UnitsParser.node_range(words[0],self.default["node_count"]),
UnitsParser.bandwidth(words[1]),
UnitsParser.latency(words[2]),
UnitsParser.node_range(words[3],self.default["node_count"])))
self.parsing_error("Invalide link \""+link+"\"")
def parse_txperf(self,txperf):
elts=txperf.split()
return((UnitsParser.node_range(elts[0],self.default["node_count"]),UnitsParser.bandwidth(elts[1]),UnitsParser.latency(elts[2])))
def parse_interfaces(self):
interfaces=self.platform["interfaces"]
node_count=self.default["node_count"]
for i in interfaces:
if interfaces[i]["type"] not in ["wireless","wired"]:
self.parsing_error("Invalid interface type \""+interfaces[i]["type"]+"\"")
is_wired=interfaces[i]["type"] == "wired"
links=list()
if type(interfaces[i]["links"]) != list:
self.parsing_error("Invalide type of links in interface "+i)
for link in interfaces[i]["links"]:
links.append(self.parse_link(link))
##### 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 txperf in txperfs:
p=self.parse_txperf(txperf)
for node in p[0]:
BW[node][node]=p[1]
LAT[node][node]=p[2]
if (BW.diagonal()==0).any():
self.parsing_error("Not all node have a txpref on the wireless interface "+i)
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.parsing_error("node count should be a number")
self.default["node_count"]=nodes["count"]
else:
self.parsing_error("node count not provided")
if "implementations" in nodes:
if type(nodes["implementations"]) != list:
self.parsing_error("nodes implementations should be a list of file path")
self.default["implementations"]=[None]*self.default["node_count"]
for impl in nodes["implementations"]:
words=impl.split()
r=UnitsParser.node_range(words[0],self.default["node_count"])
file="".join(words[1:])
if not os.path.exists(os.path.join(self.location,file)):
self.parsing_error("File "+file+ " not found")
path, extension = os.path.splitext(file)
if extension != ".py":
self.parsing_error("File "+file+" must be a python file")
for node in r:
self.default["implementations"][node]=path
else:
self.parsing_error("node implementation not provided")
##### Nodes arguments
self.default["arguments"]=[None]*self.default["node_count"]
if "arguments" in nodes:
args=nodes["arguments"]
for r in args:
for node_id in UnitsParser.node_range(r,self.default["node_count"]):
self.default["arguments"][node_id]=args[r]
def parse_general(self):
general=self.platform["general"]
if "breakpoints" in general:
if type(general["breakpoints"]) != list:
self.parsing_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.parsing_error("breakpoints_every should be a number")
self.default["breakpoints_every"]=general["breakpoints_every"]
if "breakpoints_callback" in general:
cb=general["breakpoints_callback"]
file=cb["file"]
path, ext=os.path.splitext(file)
if not os.path.exists(file):
self.parsing_error("File "+file+ " not found")
path, extension = os.path.splitext(file)
if extension != ".py":
self.parsing_error("File "+file+" must be a python file")
self.default["breakpoints_file"]=cb["file"]
self.default["breakpoints_callback"]=cb["callback"]
if "debug" in general:
if type(general["debug"]) != bool:
self.parsing_error("debug should be on or off")
self.default["debug"]=general["debug"]
if "debug_file" in general:
self.default["debug_file"]=general["debug_file"]
if "interferences" in general:
if type(general["interferences"]) != bool:
self.parsing_error("interferences should be on or off")
self.default["interferences"]=general["interferences"]
def run(self):
##### First load callback from file if any
if self.default["breakpoints_file"] != None:
module, ext=os.path.splitext(self.default["breakpoints_file"])
imported=importlib.import_module(module)
callback=getattr(imported, self.default["breakpoints_callback"])
self.default["breakpoints_callback"]=callback
##### Create simulator
simulator=Simulator(self.default["interfaces"])
for node_id in range(0,self.default["node_count"]):
simulator.create_node(self.default["implementations"][node_id], args=self.default["arguments"][node_id])
##### Run simulation
simulator.run(
breakpoints=self.default["breakpoints"],
breakpoints_every=self.default["breakpoints_every"],
breakpoint_callback=self.default["breakpoints_callback"],
debug=self.default["debug"],
debug_file_path=self.default["debug_file"],
interferences=self.default["interferences"])
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