03c99d7662
The IPv4 fragment reassembly code supports a limit on the number of fragments per packet. The default limit is currently 17 fragments. Among other things, this limit serves to limit the number of fragments the code must parse when trying to reassembly a packet. Add a limit to the IPv6 reassembly code. By default, limit a packet to 65 fragments (64 on the queue, plus one final fragment to complete the packet). This allows an average fragment size of 1,008 bytes, which should be sufficient to hold a fragment. (Recall that the IPv6 minimum MTU is 1280 bytes. Therefore, this configuration allows a full-size IPv6 packet to be fragmented on a link with the minimum MTU and still carry approximately 272 bytes of headers before the fragmented portion of the packet.) Users can adjust this limit using the net.inet6.ip6.maxfragsperpacket sysctl. Reviewed by: jhb Security: FreeBSD-SA-18:10.ip Security: CVE-2018-6923
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FreeBSD
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
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. See build(7), config(8), https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/makeworld.html, and https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/kernelconfig.html for more information, including setting make(1) variables.
Source Roadmap:
bin System/user commands.
cddl Various commands and libraries under the Common Development
and Distribution License.
contrib Packages contributed by 3rd parties.
crypto Cryptography stuff (see crypto/README).
etc Template files for /etc.
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.
stand Boot loader sources.
sys Kernel sources.
sys/<arch>/conf Kernel configuration files. GENERIC is the configuration
used in release builds. NOTES contains documentation of
all possible entries.
tests Regression tests which can be run by Kyua. See tests/README
for additional information.
tools Utilities for regression testing and miscellaneous tasks.
usr.bin User commands.
usr.sbin System administration commands.
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https://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/current-stable.html