Rewrite the link descriptor transfer code in MP mode.

Previously, ppp attempted to bind() to a local domain tcp socket
based on the peer authname & enddisc. If it succeeded, it listen()ed
and becam

Rewrite the link descriptor transfer code in MP mode.

Previously, ppp attempted to bind() to a local domain tcp socket
based on the peer authname & enddisc. If it succeeded, it listen()ed
and became MP server. If it failed, it connect()ed and became MP
client. The server then select()ed on the descriptor, accept()ed
it and wrote its pid to it then read the link data & link file descriptor,
and finally sent an ack (``!''). The client would read() the server
pid, transfer the link lock to that pid, send the link data & descriptor
and read the ack. It would then close the descriptor and clean up.

There was a race between the bind() and listen() where someone could
attempt to connect() and fail.

This change removes the race. Now ppp makes the RCVBUF big enough on a
socket descriptor and attempts to bind() to a local domain *udp* socket
(same name as before). If it succeeds, it becomes MP server. If it
fails, it sets the SNDBUF and connect()s, becoming MP client. The server
select()s on the descriptor and recvmsg()s the message, insisting on at
least two descriptors (plus the link data). It uses the second descriptor
to write() its pid then read()s an ack (``!''). The client creates a
socketpair() and sendmsg()s the link data, link descriptor and one of
the socketpair descriptors. It then read()s the server pid from the
other socketpair descriptor, transfers any locks and write()s an ack.

Now, there can be no race, and a connect() failure indicates a stale
socket file.

This also fixes MP ppp over ethernet, where the struct msghdr was being
misconstructed when transferring the control socket descriptor.

Also, if we fail to send the link, don't hang around in a ``session
owner'' state, just do the setsid() and fork() if it's required to
disown a tty.

UDP idea suggested by: Chris Bennet from Mindspring at FreeBSDCon

show more ...

Fix ``set proctitle'' by using setproctitle().

Add the -unit command line switch for specifying the tun device.
Warn about -alias being depricated (but still allow it).
Don't moan twice about failing to open any tun device.
Fix a diagnostic and a

Add the -unit command line switch for specifying the tun device.
Warn about -alias being depricated (but still allow it).
Don't moan twice about failing to open any tun device.
Fix a diagnostic and add the -quiet switch to the usage message.

show more ...

$Id$ -> $FreeBSD$

o Add the -foreground switch. This switch behaves like -background except
that ppp stays in the foreground.
o Add the -quiet switch to quieten ppps startup
o Add the -nat flag and discourage the u

o Add the -foreground switch. This switch behaves like -background except
that ppp stays in the foreground.
o Add the -quiet switch to quieten ppps startup
o Add the -nat flag and discourage the use of the -alias flag. Both do
the same thing.
o Correct some nat usage strings.
o Change the internal ``alias'' command to ``nat''.

show more ...

Implement a minimum idle time value as an optional second argument
to ``set timeout''.
This is useful for situations where your minimum call charge is (say)
5 minutes (like mine is)

o Obsolete the undocumented ``set weight'' command.
o If we're using RADIUS and the RADIUS mtu is less than our
peers mru/mrru, reduce our mtu to this value for NetBSD too.
o Make struct throughput

o Obsolete the undocumented ``set weight'' command.
o If we're using RADIUS and the RADIUS mtu is less than our
peers mru/mrru, reduce our mtu to this value for NetBSD too.
o Make struct throughput's sample period dynamic and tweak the ppp
version number to reflect the extra stuff being passed through
the local domain socket as a result (MP mode).
o Measure the current throughput based on the number of samples actually
taken rather than on the full sample period.
o Keep the throughput statisics persistent while being passed to
another ppp invocation through the local domain socket.
o When showing throughput statistics after the timer has stopped, use
the stopped time for overall calculations, not the current time.
Also show the stopped time and how long the current throughput has
been sampled for.
o Use time() consistently in throughput.c
o Tighten up the ``show bundle'' output.
o Introduce the ``set bandwidth'' command.
o Rewrite the ``set autoload'' command. It now takes three arguments
and works based on a rolling bundle throughput average compared against
the theoretical bundle bandwidth over a given period (read: it's now
functional).

show more ...

Introduce the ``keep-session'' option. Refer to the man
page for details. This allows MP over non-tty devices where
the original ppp process must not exit (such as sshd-spawned
ppp sessions).

Remember if MYADDR or HISADDR is used in a filter add tweak all
filters any time either value changes.

Initial RADIUS support (using libradius). See the man page for
details. Compiling with -DNORADIUS (the default for `release')
removes support.

TODO: The functionality in libradius::rad_send_reques

Initial RADIUS support (using libradius). See the man page for
details. Compiling with -DNORADIUS (the default for `release')
removes support.

TODO: The functionality in libradius::rad_send_request() needs
to be supplied as a set of routines so that ppp doesn't
have to wait indefinitely for the radius server(s). Instead,
we need to get a descriptor back, select() on the descriptor,
and ask libradius to service it when necessary.
For now, ppp blocks SIGALRM while in rad_send_request(), so
it misses PAP/CHAP retries & timeouts if they occur.

Only PAP is functional. When CHAP is attempted, libradius
complains that no User-Password has been specified... rfc2138
says that it *mustn't* be used for CHAP :-(

Sponsored by: Internet Business Solutions Ltd., Switzerland

show more ...

When using ``set device !someprogram'', when ``someprogram''
exits, it causes a select() exception.
Handle these select() exceptions on link descriptors in pretty
much the same way as loss of carrier

When using ``set device !someprogram'', when ``someprogram''
exits, it causes a select() exception.
Handle these select() exceptions on link descriptors in pretty
much the same way as loss of carrier rather than dropping out
in confusion.

show more ...

Remove some redundant (#if 0'd) code.

Add ``set proctitle'' for changing argv[0]. All substitutions
are done in the same way as command execution.

For example, ``set proctitle USER INTERFACE PROCESSID'' would
be useful in a -direct pro

Add ``set proctitle'' for changing argv[0]. All substitutions
are done in the same way as command execution.

For example, ``set proctitle USER INTERFACE PROCESSID'' would
be useful in a -direct profile for identifying who's connected.

show more ...

Shuffle the iface-alias option so that's in alphabetical
order like the rest of the options.

Add ``enable proxyall'' support. This adds proxy ARP entries
for every machine on every class C or smaller subnet that we
route to.
Add ``set {send,recv}pipe'' for controlling our socket buffer
size

Add ``enable proxyall'' support. This adds proxy ARP entries
for every machine on every class C or smaller subnet that we
route to.
Add ``set {send,recv}pipe'' for controlling our socket buffer
sizes.
Mention the IP number with the problem in a few error messages.
All submitted by: Craig Leres <leres@ee.lbl.gov>
Modified slightly by: me

show more ...

Loosen our restrictions on setting enddisc, mrru,
shortseq, authname and authkey.

o Auth{name,key} may additionally be set in PHASE_ESTABLISH.
o The others may be set in PHASE_ESTABLISH as long as n

Loosen our restrictions on setting enddisc, mrru,
shortseq, authname and authkey.

o Auth{name,key} may additionally be set in PHASE_ESTABLISH.
o The others may be set in PHASE_ESTABLISH as long as no links
have yet reached DATALINK_LCP.

show more ...

Solve the ``first connection'' problem that occurs on
demand-dial links with dynamic IP numbers where the program
that causes the dial bind()s to an interface address that is
subsequently changed aft

Solve the ``first connection'' problem that occurs on
demand-dial links with dynamic IP numbers where the program
that causes the dial bind()s to an interface address that is
subsequently changed after ppp negotiation.

The problem is defeated by adding negotiated addresses to the
tun interface as additional alias addresses and providing a set
of ``iface'' commands for managing the interface. Libalias is
also required (and what a name clash!) - it happily IP-aliases
the address so that the source is that of the primary (negotiated)
interface and un-IP-aliases it on the way back.

An ``enable iface-alias'' is done implicitly by the -alias command
line switch. If -alias isn't given, iface-aliasing is disabled by
default and can't be enabled 'till an ``alias enable yes'' is done.
``alias enable no'' silently disables iface-alias.

So, for dynamic-IP-type-connections, running ``ppp -alias -auto blah''
will work for the first connection, although existing bindings will
not survive a disconnect/connect as the TCP peer will be trying to
send to the old IP address - the packets won't route.

It's now a lot easier to add IPXCP to ppp with minor updates to
the new iface.[ch] (if anyone ever gets 'round to it).

It's also now possible to manually add interface aliases with
something like ``iface add 1.2.3.4/24 5.6.7.8''. This allows
multi-homed ppp links :-)

show more ...

If we've got a full output buffer queue and cannot send
anything for two mintues (see ``set choked'' and ``show
bundle''), nuke the ip, mp and link level buffer queues.

This should fix problems wher

If we've got a full output buffer queue and cannot send
anything for two mintues (see ``set choked'' and ``show
bundle''), nuke the ip, mp and link level buffer queues.

This should fix problems where ``ppp -auto'' seems to stop
responding after failing to connect to the peer a few times.

show more ...

o Support callback types NONE, E.164, AUTH and CBCP.
(see the new ``set callback'' and ``set cbcp'' commands)
o Add a ``cbcp'' log level and mbuf type.
o Don't dump core when \T is given in ``set l

o Support callback types NONE, E.164, AUTH and CBCP.
(see the new ``set callback'' and ``set cbcp'' commands)
o Add a ``cbcp'' log level and mbuf type.
o Don't dump core when \T is given in ``set login'' or
``set hangup''.
o Allow ``*'' and blanks as placeholders in ppp.secret and
allow a fifth field for specifying auth/cbcp dialback
parameters.
o Remove a few extraneous #includes
o Define the default number of REQs (restart counter) in defs.h
rather than hardcoding ``5'' all over the place.
o Fix a few man page inconsistencies.

show more ...

Allow an optional ``!'' in the open, dial & call commands.
When used, the redial timer is ignored and the modem is
opened immediately.

Silence ``Network unreachable'' warnings when using
``add .... HISADDR''. The network will never be
reachable at this point unless we're in -auto or reading
the command from ppp.linkup.

We can now

Silence ``Network unreachable'' warnings when using
``add .... HISADDR''. The network will never be
reachable at this point unless we're in -auto or reading
the command from ppp.linkup.

We can now run the following lines and get the expected
results:

set ifaddr 1.2.3.4/0 5.6.7.8/0
add default HISADDR

where a route is added immediately in auto mode and the
whole thing is delayed 'till the IP numbers have been
agreed in other modes.

Essentially, ppp.linkup is no longer required.

show more ...

Don't dlopen()/dlsym() libalias, use it in the same way
as the rest of the world uses libraries.

Don't bring the modem offline or hangup when ``down lcp''
is done. Instead, behave like ``close lcp''.

o Maintain a link-type mask for open datalinks as well as
for all datalinks in a bundle. Ppp now deals correctly
with link types that are changed while open
o When changing the type of the last

o Maintain a link-type mask for open datalinks as well as
for all datalinks in a bundle. Ppp now deals correctly
with link types that are changed while open
o When changing the type of the last AUTO link, only clear
the interface if we're not in PHASE_NETWORK. This allows
us to switch to -ddial mode while we have a connection
without suddenly unexpectedly throttling ourselves by
clearing the interface configuration.
Problem area noted by: Aaron Jeremias Luz <aaron@csh.rit.edu>

show more ...

Put the correct pid in /var/run/tunX.pid
Suggested by: many