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933fc4dde6
IPv4 addresses can and do change during normal operation. Testing by pfSense developers exposed an issue where OpenOSPFD was using the IPv4 address to leave the OSPF link-scope multicast groups on a dynamic OpenVPN tun interface, rather than using RFC 3678 with the interface index, which won't be raced when the interface's addresses change. In inp_join_group(): If we are already a member of an ASM group, and IP_ADD_MEMBERSHIP or MCAST_JOIN_GROUP ioctls are re-issued, return EADDRINUSE as per the legacy 4.4BSD multicast API. This bends RFC 3678 slightly, but does not violate POLA for apps using the old API. It also stops us falling through to kicking IGMP state transactions in what is otherwise a no-op case. [This has already been dealt with in HEAD, but make it explicit before we MFC the change to 8.] In inp_leave_group(): Fix a bogus conditional. Move the ifp null check to ioctls MCAST_LEAVE* in the switch..case where it actually belongs. If an interface was specified, by primary IPv4 address, for ioctl IP_DROP_MEMBERSHIP or MCAST_LEAVE_GROUP (an ASM full leave operation), then and only then should we look up the ifp from the IPv4 address in mreqs.imr_interface. If not, we fall through to imo_match_group() as before, but only in the IP_DROP_MEMBERSHIP case. With these changes, the legacy 4.4BSD multicast API idempotence should be mostly preserved in the SSM enabled IPv4 stack. Found by: ermal (with pfSense) MFC after: 3 days |
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| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| games | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| sys | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| ObsoleteFiles.inc | ||
| README | ||
| UPDATING | ||
This is the top level of the FreeBSD source directory. This file was last revised on: $FreeBSD$ For copyright information, please see the file COPYRIGHT in this directory (additional copyright information also exists for some sources in this tree - please see the specific source directories for more information). The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree, the most commonly used one being ``world'', which rebuilds and installs everything in the FreeBSD system from the source tree except the kernel, the kernel-modules and the contents of /etc. The ``world'' target should only be used in cases where the source tree has not changed from the currently running version. See: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html for more information, including setting make(1) variables. The ``buildkernel'' and ``installkernel'' targets build and install the kernel and the modules (see below). Please see the top of the Makefile in this directory for more information on the standard build targets and compile-time flags. Building a kernel is a somewhat more involved process, documentation for which can be found at: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html And in the config(8) man page. Note: If you want to build and install the kernel with the ``buildkernel'' and ``installkernel'' targets, you might need to build world before. More information is available in the handbook. The sample kernel configuration files reside in the sys/<arch>/conf sub-directory (assuming that you've installed the kernel sources), the file named GENERIC being the one used to build your initial installation kernel. The file NOTES contains entries and documentation for all possible devices, not just those commonly used. It is the successor of the ancient LINT file, but in contrast to LINT, it is not buildable as a kernel but a pure reference and documentation file. Source Roadmap: --------------- bin System/user commands. contrib Packages contributed by 3rd parties. crypto Cryptography stuff (see crypto/README). etc Template files for /etc. games Amusements. gnu Various commands and libraries under the GNU Public License. Please see gnu/COPYING* for more information. include System include files. kerberos5 Kerberos5 (Heimdal) package. lib System libraries. libexec System daemons. release Release building Makefile & associated tools. rescue Build system for statically linked /rescue utilities. sbin System commands. secure Cryptographic libraries and commands. share Shared resources. sys Kernel sources. tools Utilities for regression testing and miscellaneous tasks. usr.bin User commands. usr.sbin System administration commands. For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see: http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/synching.html