were destined for a broadcast IP address. All TCP packets with a
broadcast destination must be ignored. The system only ignored packets
that were _link-layer_ broadcasts or multicast. We need to check the
IP address too since it is quite possible for a broadcast IP address
to come in with a unicast link-layer address.
Note that the check existed prior to CSRG revision 7.35, but was
removed. This commit effectively backs out that nine-year-old change.
PR: misc/35022
so that after the first time we can follow the pointer instead
of having to scan the list.
This was the intended behaviour from day one.
PR: 34639
MFC-after: 3 days
deprecated in favor of the POSIX-defined lowercase variants.
o Change all occurrences of NTOHL() and associated marcros in the
source tree to use the lowercase function variants.
o Add missing license bits to sparc64's <machine/endian.h>.
Approved by: jake
o Clean up <machine/endian.h> files.
o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>.
o Remove prototypes for non-existent bswapXX() functions.
o Include <machine/endian.h> in <arpa/inet.h> to define the
POSIX-required ntohl() family of functions.
o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>,
and <sys/param.h>.
o Prepend underscores to the ntohl() family to help deal with
complexities associated with having MD (asm and inline) versions, and
having to prevent exposure of these functions in other headers that
happen to make use of endian-specific defines.
o Create weak aliases to the canonical function name to help deal with
third-party software forgetting to include an appropriate header.
o Remove some now unneeded pollution from <sys/types.h>.
o Add missing <arpa/inet.h> includes in userland.
Tested on: alpha, i386
Reviewed by: bde, jake, tmm
this is a low-functionality change that changes the kernel to access the main
thread of a process via the linked list of threads rather than
assuming that it is embedded in the process. It IS still embeded there
but remove all teh code that assumes that in preparation for the next commit
which will actually move it out.
Reviewed by: peter@freebsd.org, gallatin@cs.duke.edu, benno rice,
some time. _All_ packets, regardless of destination, were accepted by
the machine as if addressed to it.
Jump back to 'pass' processing for a teed packet instead of falling
through as if it was ours.
PR: kern/31130
Reviewed by: -net, luigi
MFC after: 2 weeks
- Clear the cached destination before getting another cached route.
Otherwise, garbage in the padding space (which might be filled in if it was
used for IPv4) could annoy rtalloc.
Obtained from: KAME
(We should be able to handle locally originated IP packets, and
these do not have m_pkthdr.rcvif set.)
PR: kern/32806, kern/33766
Reviewed by: luigi
Fix tested by: Maxim Konovalov <maxim@macomnet.ru>,
Erwin Lansing <erwin@lansing.dk>
The following steps are involved:
a) the IP options related to routing (LSRR and SSRR) are processed
as though the router were a host,
b) the other IP options are processed as usual only if the packet
is destined for the router; otherwise they are ignored.
PR: kern/23123
Discussed in: freebsd-hackers
An old route will be NULL at that point if a packet were initially
routed to an interface (using the IP_ROUTETOIF flag.)
Submitted by: Igor Timkin <ivt@gamma.ru>
All TCP ISNs that are sent out are valid cookies, which allows entries
in the syncache to be dropped and still have the ACK accepted later.
As all entries pass through the syncache, there is no sudden switchover
from cache -> cookies when the cache is full; instead, syncache entries
simply have a reduced lifetime. More details may be found in the
"Resisting DoS attacks with a SYN cache" paper in the Usenix BSDCon 2002
conference proceedings.
Sponsored by: DARPA, NAI Labs
Now that we've increased the size of our send / receive buffers, bursting
an entire window onto the network may cause congestion. As a result,
we will slow start beginning with a flightsize of 4 packets.
Problem reported by: Thomas Zenker <thz@Lennartz-electronic.de>
MFC after: 3 days
Easily exploitable by flood pinging the target
host over an interface with the IFF_NOARP flag
set (all you need to know is the target host's
MAC address).
MFC after: 0 days
mutable contents of struct prison (hostname, securelevel, refcount,
pr_linux, ...)
o Generally introduce mtx_lock()/mtx_unlock() calls throughout kern/
so as to enforce these protections, in particular, in kern_mib.c
protection sysctl access to the hostname and securelevel, as well as
kern_prot.c access to the securelevel for access control purposes.
o Rewrite linux emulator abstractions for accessing per-jail linux
mib entries (osname, osrelease, osversion) so that they don't return
a pointer to the text in the struct linux_prison, rather, a copy
to an array passed into the calls. Likewise, update linprocfs to
use these primitives.
o Update in_pcb.c to always use prison_getip() rather than directly
accessing struct prison.
Reviewed by: jhb
receiver was not sending an immediate ack with delayed acks turned on
when the input buffer is drained, preventing the transmitter from
restarting immediately.
Propogate the TCP_NODELAY option to accept()ed sockets. (Helps tbench and
is a good idea anyway).
Some cleanup. Identify additonal issues in comments.
MFC after: 1 day
o Hide nonstandard functions and types in <netinet/in.h> when
_POSIX_SOURCE is defined.
o Add some missing types (required by POSIX.1-200x) to <netinet/in.h>.
o Restore vendor ID from Rev 1.1 in <netinet/in.h> and make use of new
__FBSDID() macro.
o Fix some miscellaneous issues in <arpa/inet.h>.
o Correct final argument for the inet_ntop() function (POSIX.1-200x).
o Get rid of the namespace pollution from <sys/types.h> in
<arpa/inet.h>.
Reviewed by: fenner
Partially submitted by: bde
interface address, blow the address away again before returning the
error.
In in_ifinit(), if we get an error from rtinit() and we've also got
a destination address, return the error rather than masking EEXISTS.
Failing to create a host route when configuring an interface should
be treated as an error.
