1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
"""Implements asyncore-based generic DGRAM transport"""
import socket, errno
from pysnmp.carrier.asynsock.base import AbstractSocketTransport
from pysnmp.carrier import error
sockErrors = {
errno.ESHUTDOWN: 1,
errno.ENOTCONN: 1,
errno.ECONNRESET: 1
}
class DgramSocketTransport(AbstractSocketTransport):
sockType = socket.SOCK_DGRAM
retryCount = 3; retryInterval = 1
def __init__(self, sock=None, sockMap=None):
self.__outQueue = []
AbstractSocketTransport.__init__(self, sock, sockMap)
def openClientMode(self, iface=None):
if iface is not None:
try:
self.socket.bind(iface)
except socket.error, why:
raise error.CarrierError('bind() failed: %s' % why)
return self
def openServerMode(self, iface):
try:
self.socket.bind(iface)
except socket.error, why:
raise error.CarrierError('bind() failed: %s' % why)
self._iface = iface
return self
def sendMessage(self, outgoingMessage, transportAddress):
self.__outQueue.append(
(outgoingMessage, transportAddress)
)
# asyncore API
def handle_connect(self): pass
def writable(self): return self.__outQueue
def handle_write(self):
outgoingMessage, transportAddress = self.__outQueue.pop()
try:
self.socket.sendto(outgoingMessage, transportAddress)
except socket.error, why:
if why[0] != errno.EWOULDBLOCK:
raise socket.error, why
def readable(self): return 1
def handle_read(self):
try:
incomingMessage, transportAddress = self.socket.recvfrom(65535)
if not incomingMessage:
self.handle_close()
return
else:
self._cbFun(self, transportAddress, incomingMessage)
return
except socket.error, why:
if sockErrors.has_key(why[0]):
self.handle_close()
return
else:
raise socket.error, why
def handle_close(self): pass # no datagram connection
|
