xCAT/confluent
2
0
Fork 0
mirror of https://github.com/xcat2/confluent.git synced 2025-01-27 11:30:06 +00:00
Code Issues Projects Releases Wiki Activity

Document the netlink data in neighutil

Browse Source
This commit is contained in:
Jarrod Johnson 2021-08-25 17:57:52 -04:00
parent 093e961613
commit ba7ccaa7f2
1 changed files with 3 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
confluent_server/confluent/neighutil.py
View File

@ -38,14 +38,16 @@ def _update_neigh():
s = socket.socket(socket.AF_NETLINK, socket.SOCK_RAW, socket.NETLINK_ROUTE)
s.bind((0, 0))
# RTM_GETNEIGH
# nlmsghdr struct: u32 len, u16 type, u16 flags, u32 seq, u32 pid
nlhdr = b'\x1c\x00\x00\x00\x1e\x00\x01\x03\x00\x00\x00\x00\x00\x00\x00\x00'
# ndmsg struct u8 family u8 pad, u16 pad, s32 ifidx, u16 state, u8 flags, u8 type
ndmsg= b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
s.sendall(nlhdr + ndmsg)
neightable = {}
while True:
pdata = s.recv(65536)
v = memoryview(pdata)
if struct.unpack('H', v[4:6])[0] == 3:
if struct.unpack('H', v[4:6])[0] == 3: # netlink done message
break
while len(v):
length, typ = struct.unpack('IH', v[:6])