diff options
Diffstat (limited to 'pysnmp/carrier/asynsock/dgram/base.py')
| -rw-r--r-- | pysnmp/carrier/asynsock/dgram/base.py | 68 |
1 files changed, 60 insertions, 8 deletions
diff --git a/pysnmp/carrier/asynsock/dgram/base.py b/pysnmp/carrier/asynsock/dgram/base.py index 5c3970d..2471f0d 100644 --- a/pysnmp/carrier/asynsock/dgram/base.py +++ b/pysnmp/carrier/asynsock/dgram/base.py @@ -1,7 +1,7 @@ # Implements asyncore-based generic DGRAM transport import socket, errno, sys from pysnmp.carrier.asynsock.base import AbstractSocketTransport -from pysnmp.carrier import error +from pysnmp.carrier import sockfix, sockmsg, error from pysnmp import debug sockErrors = { # Ignore these socket errors @@ -21,6 +21,11 @@ class DgramSocketTransport(AbstractSocketTransport): retryCount = 3; retryInterval = 1 def __init__(self, sock=None, sockMap=None): self.__outQueue = [] + self._sendto = lambda s,b,a: s.sendto(b, a) + def __recvfrom(s, sz): + d, a = s.recvfrom(sz) + return d, self.addressType(a) + self._recvfrom = __recvfrom AbstractSocketTransport.__init__(self, sock, sockMap) def openClientMode(self, iface=None): @@ -38,22 +43,65 @@ class DgramSocketTransport(AbstractSocketTransport): raise error.CarrierError('bind() for %s failed: %s' % (iface, sys.exc_info()[1],)) return self - def enableBroadcast(self, flag=True): + def enableBroadcast(self, flag=1): try: self.socket.setsockopt( socket.SOL_SOCKET, socket.SO_BROADCAST, flag ) except socket.error: raise error.CarrierError('setsockopt() for SO_BROADCAST failed: %s' % (sys.exc_info()[1],)) + debug.logger & debug.flagIO and debug.logger('enableBroadcast: %s option SO_BROADCAST on socket %s' % (turnOn and "enabled" or "disabled", self.socket.fileno())) + return self + + def enablePktInfo(self, flag=1): + if not hasattr(self.socket, 'sendmsg') or \ + not hasattr(self.socket, 'recvmsg'): + raise error.CarrierError('sendmsg()/recvmsg() interface is not supported by this OS and/or Python version') + + try: + if self.socket.family in (socket.AF_INET,socket.AF_INET6): + self.socket.setsockopt(socket.SOL_IP, socket.IP_PKTINFO, flag) + if self.socket.family == socket.AF_INET6: + self.socket.setsockopt(socket.SOL_IPV6, socket.IPV6_RECVPKTINFO, flag) + except socket.error: + raise error.CarrierError('setsockopt() for %s failed: %s' % (self.socket.family == socket.AF_INET6 and "IPV6_RECVPKTINFO" or "IP_PKTINFO", sys.exc_info()[1])) + + self._sendto = sockmsg.getSendTo(self.addressType) + self._recvfrom = sockmsg.getRecvFrom(self.addressType) + + debug.logger & debug.flagIO and debug.logger('enablePktInfo: %s option %s on socket %s' % (self.socket.family == socket.AF_INET6 and "IPV6_RECVPKTINFO" or "IP_PKTINFO", flag and "enabled" or "disabled", self.socket.fileno())) + return self + + def enableTransparent(self, flag=1): + try: + if self.socket.family == socket.AF_INET: + self.socket.setsockopt( + socket.SOL_IP, socket.IP_TRANSPARENT, flag + ) + if self.socket.family == socket.AF_INET6: + self.socket.setsockopt( + socket.SOL_IPV6, socket.IP_TRANSPARENT, flag + ) + except socket.error: + raise error.CarrierError('setsockopt() for IP_TRANSPARENT failed: %s' % sys.exc_info()[1]) + except PermissionError: + raise error.CarrierError('IP_TRANSPARENT socket option requires superusre previleges') + + debug.logger & debug.flagIO and debug.logger('enableTransparent: %s option IP_TRANSPARENT on socket %s' % (flag and "enabled" or "disabled", self.socket.fileno())) return self def sendMessage(self, outgoingMessage, transportAddress): self.__outQueue.append( - (outgoingMessage, transportAddress) + (outgoingMessage, self.normalizeAddress(transportAddress)) ) debug.logger & debug.flagIO and debug.logger('sendMessage: outgoingMessage queued (%d octets) %s' % (len(outgoingMessage), debug.hexdump(outgoingMessage))) - def normalizeAddress(self, transportAddress): return transportAddress + def normalizeAddress(self, transportAddress): + if not isinstance(transportAddress, self.addressType): + transportAddress = self.addressType(transportAddress) + if not transportAddress.getLocalAddress(): + transportAddress.setLocalAddress(self.getLocalAddress()) + return transportAddress def getLocalAddress(self): # one evil OS does not seem to support getsockname() for DGRAM sockets @@ -67,12 +115,14 @@ class DgramSocketTransport(AbstractSocketTransport): def writable(self): return self.__outQueue def handle_write(self): outgoingMessage, transportAddress = self.__outQueue.pop(0) - debug.logger & debug.flagIO and debug.logger('handle_write: transportAddress %r -> %r outgoingMessage (%d octets) %s' % (self.getLocalAddress(), transportAddress, len(outgoingMessage), debug.hexdump(outgoingMessage))) + debug.logger & debug.flagIO and debug.logger('handle_write: transportAddress %r -> %r outgoingMessage (%d octets) %s' % (transportAddress.getLocalAddress(), transportAddress, len(outgoingMessage), debug.hexdump(outgoingMessage))) if not transportAddress: debug.logger & debug.flagIO and debug.logger('handle_write: missing dst address, loosing outgoing msg') return try: - self.socket.sendto(outgoingMessage, transportAddress) + self._sendto( + self.socket, outgoingMessage, transportAddress + ) except socket.error: if sys.exc_info()[1].args[0] in sockErrors: debug.logger & debug.flagIO and debug.logger('handle_write: ignoring socket error %s' % (sys.exc_info()[1],)) @@ -82,9 +132,11 @@ class DgramSocketTransport(AbstractSocketTransport): def readable(self): return 1 def handle_read(self): try: - incomingMessage, transportAddress = self.socket.recvfrom(65535) + incomingMessage, transportAddress = self._recvfrom( + self.socket, 65535 + ) transportAddress = self.normalizeAddress(transportAddress) - debug.logger & debug.flagIO and debug.logger('handle_read: transportAddress %r -> %r incomingMessage (%d octets) %s' % (transportAddress, self.getLocalAddress(), len(incomingMessage), debug.hexdump(incomingMessage))) + debug.logger & debug.flagIO and debug.logger('handle_read: transportAddress %r -> %r incomingMessage (%d octets) %s' % (transportAddress, transportAddress.getLocalAddress(), len(incomingMessage), debug.hexdump(incomingMessage))) if not incomingMessage: self.handle_close() return |