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- This is a description of a bug in SunOS 4.0 NIT, which is not fixed in 4.0.3
-
- 1016994: Public Summary:
- 1016994: The ifpromisc() routine of net/if.c, which handles
- 1016994: transitions into and out of promiscuous mode by
- 1016994: keeping track of the number of outstanding requests
- 1016994: there are for the mode and calling the interface driver
- 1016994: to change mode on transitions to and from zero
- 1016994: has a bug that causes it to disable promiscuous
- 1016994: mode whenever it is called to disable the mode and
- 1016994: the number of outstanding requests for the mode is
- 1016994: greater than one.
- 1016994: The problem occurs only when there are more than one
- 1016994: concurrent requesters for promiscuous mode for a
- 1016994: particular interface (i.e. run multiple etherfind's
- 1016994: on the same interface in parallel, then terminate
- 1016994: one of the processes).
- 1016994: Hook 2: Needs investigation in release: 4.0.4, 4.0.4c
-
- This can cause interfaces to go out of promiscuous mode when they shouldn't;
- promiscuous mode reception may fail as a result. This also impacts the
- reception of multicast addresses with this library, since that is implemented
- on Suns with promiscuous mode reception and filtering.
-
- The only workaround seems to be to close all promiscuous mode file descriptors
- in all processes, then reopen them. Just setting the IFF_PROMISC bit with a
- SIOCSIFFLAGS ioctl doesn't seem to help.
-
-
-
- This is a description of a bug in SunOS 4.0.3 NIT.
-
- The NIT interface now receives broadcast packets sent from the local machine,
- but their ethernet source field will sometimes contain a random value. The
- packets as sent out on the ethernet are correct, but the NIT interface
- sometimes receives them incorrectly.
-
- You can tell if this bug affects you by running "etherfind -p -arp" and then
- pinging a nonexistent (or down) host. If you have the bug, you will see lots
- of arp packets from strange hosts. There is no known workaround.
-