Fix a bug in rpcbind for multihomed hosts. If the server had interfaces on
two separate subnets, and a client on the first subnet contacted rpcbind at
the address on the second subnet, rpcbind would advertise addresses on the
first subnet. This is a bug, because it should prefer to advertise the
address where it was contacted. The requested service might be firewalled
off from the address on the first subnet, for example.
usr.sbin/rpcbind/check_bound.c
If the address on which a request was received is known, pass that
to addrmerge as the clnt_uaddr parameter. That is what addrmerge's
comment indicates the parameter is supposed to mean. The previous
behavior is that clnt_uaddr would contain the address from which the
client sent the request.
usr.sbin/rpcbind/util.c
Modify addrmerge to prefer to use an IP that is equal to clnt_uaddr,
if one is found. Refactor the relevant portion of the function for
clarity, and to reduce the number of ifdefs.
etc/mtree/BSD.tests.dist
usr.sbin/rpcbind/tests/Makefile
usr.sbin/rpcbind/tests/addrmerge_test.c
Add unit tests for usr.sbin/rpcbind/util.c:addrmerge.
usr.sbin/rpcbind/check_bound.c
usr.sbin/rpcbind/rpcbind.h
usr.sbin/rpcbind/util.c
Constify some function arguments
Reviewed by: imp
MFC after: 4 weeks
Sponsored by: Spectra Logic Corp
Differential Revision: https://reviews.freebsd.org/D4690
userland via routing socket or sysctl. This eliminates the following
KAME-specific sin6_scope_id handling routine from each userland utility:
sin6.sin6_scope_id = ntohs(*(u_int16_t *)&sin6.sin6_addr.s6_addr[2]);
This behavior can be controlled by net.inet6.ip6.deembed_scopeid. This is
set to 1 by default (sin6_scope_id will be filled in the kernel).
Reviewed by: bz
interfaces (such as when you are part of a carp pool), and you run
rpcbind -h to restrict which interfaces have rpc services, rpcbind can
none-the-less return addresses that aren't in the -h list. This patch
enforces the rule that when you specify -h on the command line, then
services returned from rpcbind must be to one of the addresses listed
in -h, or be a loopback address (since localhost is implicit when
running -h).
The root cause of this is the assumption in addrmerge that there can
be only one interface that matches a given network IP address. This
turns out not to be the case. To retain historical behavior, I didn't
try to fix the routine to prefer the address that the request came
into, since I didn't know the side effects that might cause in the
normal case. My quick analysis suggests that it wouldn't be a
problem, but since this code is tricky I opted for the more
conservative patch of only restricting the reply when -h is in effect.
Hence, this change will have no effect when you are running rpcbind
without -h.
Reviewed by: alfred@
Sponsored by: iX Systems
MFC after: 2 weeks
comparing bit by bit.
Make the logic in in6_fillscopeid() match that in our ifconfig(8):
only set the scope ID if there is one in the address and none in
sin6_scope_id.
Correct a comment in network_init() that didn't make sense; it was
probably never updated after it was pasted from similar code in
addrmerge().
contained a number of memory leaks. The changes include:
- Add a comment describing what addrmerge() does.
- Deal with 0.0.0.0./::. or AF_LOCAL callers correctly.
- Use rpcbind_get_conf() instead of getnetconfigent() so we don't
have to remember to free the returned netconfig struct.
- Make just one pass through the ifaddrs list; we can pick up a fallback
interface address in the same pass as the netmask comparison.
- Define and use SA2SIN* macros to avoid the need for loads of
protocol-specific local variables.
- Use mostly protocol-independent code for building the netbuf version
of the address to be returned.
- Use the common cleanup code for virtually all error and non-error
cases, fixing a number of memory leaks.
extensive pass through the rpcbind code soon, but I might as well
bring these in now.
- (NetBSD util.c r1.5) Move the initialisation of `tbuf' to avoid
a case where it could end up containing junk from the stack. This
should address the issue in PR bin/26806.
- (NetBSD util.c r1.6) Don't `merge' AF_LOCAL addresses, fix a few
memory leaks.
PR: bin/26806
Submitted by: Martin Blapp <mb@imp.ch>
Obtained from: NetBSD
associated changes that had to happen to make this possible as well as
bugs fixed along the way.
Bring in required TLI library routines to support this.
Since we don't support TLI we've essentially copied what NetBSD
has done, adding a thin layer to emulate direct the TLI calls
into BSD socket calls.
This is mostly from Sun's tirpc release that was made in 1994,
however some fixes were backported from the 1999 release (supposedly
only made available after this porting effort was underway).
The submitter has agreed to continue on and bring us up to the
1999 release.
Several key features are introduced with this update:
Client calls are thread safe. (1999 code has server side thread
safe)
Updated, a more modern interface.
Many userland updates were done to bring the code up to par with
the recent RPC API.
There is an update to the pthreads library, a function
pthread_main_np() was added to emulate a function of Sun's threads
library.
While we're at it, bring in NetBSD's lockd, it's been far too
long of a wait.
New rpcbind(8) replaces portmap(8) (supporting communication over
an authenticated Unix-domain socket, and by default only allowing
set and unset requests over that channel). It's much more secure
than the old portmapper.
Umount(8), mountd(8), mount_nfs(8), nfsd(8) have also been upgraded
to support TI-RPC and to support IPV6.
Umount(8) is also fixed to unmount pathnames longer than 80 chars,
which are currently truncated by the Kernel statfs structure.
Submitted by: Martin Blapp <mb@imp.ch>
Manpage review: ru
Secure RPC implemented by: wpaul
