FORTIFY_SOURCE feature of libssp, thus checking the size of arguments to
various string and memory copy and set functions (as well as a few system
calls and other miscellany) where known at function entry. RedHat has
evidently built all "core system packages" with this option for some time.
This option should be used at the top of Makefiles (or Makefile.inc where
this is used for subdirectories) but after any setting of LIB.
This is only useful for userland code, and cannot be used in libc or in
any code which includes the libc internals, because it overrides certain
libc functions with macros. Some effort has been made to make USE_FORT=yes
work correctly for a full-system build by having the bsd.sys.mk logic
disable the feature where it should not be used (libc, libssp iteself,
the kernel) but no attempt has been made to build the entire system with
USE_FORT and doing so will doubtless expose numerous bugs and misfeatures.
Adjust the system build so that all programs and libraries that are setuid,
directly handle network data (including serial comm data), perform
authentication, or appear likely to have (or have a history of having)
data-driven bugs (e.g. file(1)) are built with USE_FORT=yes by default,
with the exception of libc, which cannot use USE_FORT and thus uses
only USE_SSP by default. Tested on i386 with no ill results; USE_FORT=no
per-directory or in a system build will disable if desired.
Both available for IPv4 and IPv6.
Basic implementation test results are available at
http://netbsd-soc.sourceforge.net/projects/ecn/testresults.html.
Work sponsored by the Google Summer of Code project 2006.
Special thanks to Kentaro Kurahone, Allen Briggs and Matt Thomas for their
help, comments and support during the project.
Heavily based on similar code from Claudio Jeker (at OpenBSD).
While here, fix inet/inet6 sysctl stuff commited previously to
actually work, and some other nits to make netstat more sysctl
friendly.
One step closer to losing setgid kmem on this one...
net.bpf.stats and net.bpf.peers sysctls respectively. netstat(1) now
has an additional syntax:
netstat [-s] [-B] [-I Interface]
Only the super user can see a list of BPF peers with the following command:
# netstat -B
Active BPF peers
PID Int Recv Drop Capt Flags Bufsize Comm
4941 lo0 0 0 0 I--S- 262144 tcpdump
252 ex0 19668 0 5 I-RS- 32768 dhclient
And every user can see the BPF statistics with:
$ netstat -s -B
bpf:
19669 total packets received
5 total packets captured
0 total packets dropped
This idea came from FreeBSD (Christian S.J. Peron) but, currently, they
doen't have a userland utility in the base system to read the sysctls.
Reviewed by: christos@
Rework usr.bin/netstat/fast_ipsec.c to find the stats nodes under the
new names (Kame uses the name stats so we use different ones), as well
as setting slen appropriately between calls to sysctlbyname(), and
providing forward compatibility when actually retrieving stats via
sysctlbyname().
And correct a spelling error.
1. Pass the caller-supplied protocol name down through ipsec_switch().
2. Remove my poor attempt to print fast-ipsec stats automagically for
`netstat -s'. The previous code would print (fast)IPsec per-protocol
stats even for 'netstat', which is just wrong.
A better fix would be to enumerate the sub-"protocols" under IPsec;
but first lets fix the broken behaviour now, for a pullup to 2.0.
which is a more generic "that's not in the tree" response.
ENOPROTOOPT was specific to the net subtree under the old framework,
and didn't add much value (other than letting the caller know they
were looking up something under the net subtree, which they presumably
ought to have known already).
cooperating with the callout code in working around the race
condition caused by the TCP code's use of the callout facility.
Instead of unconditionally releasing memory in tcp_close() and
SYN_CACHE_PUT(), check whether any of the related callout handlers
are about to be invoked (but have not yet done callout_ack()), and
if so, just mark the associated data structure (tcpcb or syn cache
entry) as "dead", and test for this (and release storage) in the
callout handler functions.
Do a little mbuf rework while here. Change all uses of MGET*(*, M_WAIT, *)
to m_get*(M_WAIT, *). These are not performance critical and making them
call m_get saves considerable space. Add m_clget analogue of MCLGET and
make corresponding change for M_WAIT uses.
Modify netinet, gem, fxp, tulip, nfs to support MBUFTRACE.
Begin to change netstat to use sysctl.
