ynerant/squinnondation
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Store a single hazelnut table

Browse Source
This commit is contained in:
Yohann D'ANELLO
2021-01-05 18:12:57 +01:00
parent 18d1737914
commit 311e1539f9
2 changed files with 29 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

39
squinnondation/hazel.py
View File

@@ -24,6 +24,8 @@ class Hazelnut:
self.last_hello_time = 0
self.last_long_hello_time = 0
self.symmetric = False
self.active = False
self.potential = False
try:
# Resolve DNS as an IPv6
@@ -77,8 +79,7 @@ class Squirrel(Hazelnut):
curses.init_pair(i + 1, i, curses.COLOR_BLACK)
# dictionnaries of neighbours
self.potentialhazelnuts = dict()
self.activehazelnuts = dict()
self.hazelnuts = dict()
self.nbNS = 0
self.minNS = 3 # minimal number of symmetric neighbours a squirrel needs to have.
@@ -96,22 +97,21 @@ class Squirrel(Hazelnut):
hazelnut = Hazelnut(address=address, port=port)
return hazelnut
def is_active(self, hazel: Hazelnut) -> bool:
return (hazel.address, hazel.port) in self.activehazelnuts
@property
def activehazelnuts(self) -> dict:
return {(address, port): hazelnut for (address, port), hazelnut in self.hazelnuts.items() if hazelnut.active}
def is_potential(self, hazel: Hazelnut) -> bool:
return (hazel.address, hazel.port) in self.potentialhazelnuts
def remove_from_potential(self, address: str, port: int) -> None:
self.potentialhazelnuts.pop((address, port), None)
@property
def potentialhazelnuts(self) -> dict:
return {(address, port): hazelnut for (address, port), hazelnut in self.hazelnuts.items() if hazelnut.potential}
def find_hazelnut(self, address: str, port: int) -> Hazelnut:
"""
Translate an address into a hazelnut. If this hazelnut does not exist,
creates a new hazelnut.
"""
if (address, port) in self.activehazelnuts:
return self.activehazelnuts[(address, port)]
if (address, port) in self.hazelnuts:
return self.hazelnuts[(address, port)]
hazelnut = Hazelnut(address=address, port=port)
return hazelnut
@@ -402,9 +402,8 @@ class Squirrel(Hazelnut):
if self.recent_messages[key][2][key2][2] >= 5: # the neighbour is not reactive enough
gatlv = GoAwayTLV().construct(GoAwayType.TIMEOUT, f"{self.id} No acknowledge")
pkt = Packet().construct(gatlv)
self.send_packet(self.recent_messages[key][2][key2][0], pkt)
self.activehazelnuts.pop(key2)
self.potentialhazelnuts[key2] = self.recent_messages[key][2][key2][0]
hazelnut = self.recent_messages[key][2][key2][0]
self.send_packet(hazelnut, pkt)
self.recent_messages[key][2].pop(key2)
self.refresh_lock.release()
@@ -648,11 +647,15 @@ class Squirrel(Hazelnut):
gatlv = GoAwayTLV().construct(GoAwayType.TIMEOUT, "you did not talk to me")
pkt = Packet().construct(gatlv)
self.send_packet(hazelnut, pkt)
self.activehazelnuts.pop((hazelnut.address, hazelnut.port))
self.potentialhazelnuts[(hazelnut.address, hazelnut.port)] = hazelnut
hazelnut.active = False
hazelnut.potential = True
self.update_hazelnut_table(hazelnut)
self.refresh_lock.release()
def update_hazelnut_table(self, hazelnut: Hazelnut) -> None:
self.hazelnuts[(hazelnut.address, hazelnut.port)] = hazelnut
def send_neighbours(self) -> None:
"""
Update the number of symmetric neighbours and
@@ -666,7 +669,7 @@ class Squirrel(Hazelnut):
for key, hazelnut in self.activehazelnuts.items():
if time.time() - hazelnut.last_long_hello_time <= 2 * 60:
nb_ns += 1
self.activehazelnuts[key].symmetric = True
self.hazelnuts[key].symmetric = True
ntlv = NeighbourTLV().construct(hazelnut.address, hazelnut.port)
pkt = Packet().construct(ntlv)
for destination in self.activehazelnuts.values():
@@ -748,7 +751,7 @@ class HazelManager(Thread):
# Second part: send long HelloTLVs to neighbours every 30 seconds
if time.time() - self.last_check > 30:
self.squirrel.add_system_message(f"I have {len(list(self.squirrel.activehazelnuts.values()))} friends")
self.squirrel.add_system_message(f"I have {len(list(self.squirrel.activehazelnuts))} friends")
self.squirrel.send_hello()
self.last_check = time.time()

16
squinnondation/messages.py
View File

@@ -159,7 +159,7 @@ class HelloTLV(TLV):
def handle(self, squirrel: Any, sender: Any) -> None:
time_h = time.time()
if not squirrel.is_active(sender):
if not sender.active:
sender.id = self.source_id # The sender we are given misses an id
time_hl = time.time()
else:
@@ -167,14 +167,13 @@ class HelloTLV(TLV):
if self.is_long and self.dest_id == squirrel.id:
time_hl = time.time()
# Make sure the sender is not in the potential hazelnuts
squirrel.remove_from_potential(sender.address, sender.port)
# Add entry to/actualize the active hazelnuts dictionnary
sender.last_hello_time = time_h
sender.last_long_hello_time = time_hl
sender.symmetric = True
squirrel.activehazelnuts[(sender.address, sender.port)] = sender
sender.potential = False
sender.active = True
squirrel.update_hazelnut_table(sender)
squirrel.nbNS += 1
squirrel.add_system_message(f"{self.source_id} sent me a Hello " + ("long" if self.is_long else "short"))
@@ -374,9 +373,10 @@ class GoAwayTLV(TLV):
self.message.encode("UTF-8")[:self.length - 1]
def handle(self, squirrel: Any, sender: Any) -> None:
if squirrel.is_active(sender):
squirrel.activehazelnuts.pop((sender.address, sender.port))
squirrel.potentialhazelnuts[(sender.address, sender.port)] = sender
if sender.active:
sender.active = False
sender.potential = True
squirrel.update_hazelnut_table(sender)
squirrel.add_system_message("Some told me that he went away : " + self.message)
@staticmethod