ModemManager needs to have CLOCAL set in the TTY termios configuration, in order
to notify the kernel that modem control lines are not in effect (e.g. so that a
transition to LOW in the DCD input control line doesn't trigger a hangup in the
TTY).

pppd in the other hand, needs CLOCAL unset in order to have proper modem control
lines in effect during the PPP session. So, when pppd starts it will store the
original termios settings, and before exiting it will restore the original
settings in the TTY. In other words, if CLOCAL was set before launching pppd,
CLOCAL will be also set after pppd exits.

Now, in order for this sequence to work correctly, NetworkManager also needs to
make sure that ModemManager is notified about the disconnection only after pppd
has really finished re-configuring the TTY.

https://bugzilla.gnome.org/show_bug.cgi?id=734347

----------------------

Once the patch is applied, we will be making sure that ModemManager is only
notified about the disconnection AFTER pppd has fully exited:
    NetworkManager[27589]: <info>  (ttyUSB2): device state change: activated -> deactivating (reason 'user-requested') [100 110 39]
    Terminating on signal 15
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 10 / phase 'terminate'
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 8 / phase 'network'
    Connect time 0.3 minutes.
    Sent 56 bytes, received 0 bytes.
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 5 / phase 'establish'
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 11 / phase 'disconnect'
    Connection terminated.
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 1 / phase 'dead'
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_exit_notify): cleaning up
    NetworkManager[27589]: <warn>  pppd pid 27617 exited with error: pppd received a signal
    NetworkManager[27589]: <info>  (ttyUSB2): modem state changed, 'connected' --> 'disconnecting' (reason: user-requested)
    NetworkManager[27589]: <info>  (ttyUSB2): modem state changed, 'disconnecting' --> 'registered' (reason: user-requested)
    NetworkManager[27589]: <info>  (ttyUSB2) modem deactivation finished
    NetworkManager[27589]: <info>  (ttyUSB2): device state change: deactivating -> disconnected (reason 'user-requested') [110 30 39]
    NetworkManager[27589]: <info>  (ttyUSB2): deactivating device (reason 'user-requested') [39]

This method doesn't prevent the original logic in which the child process was
stopped when the last reference of the PPP manager was unref-ed.

This method isn't run if NM is quitting; so the deactivate() method still needs
to be implemented to handle sync disconnection requests.

Signed-off-by: Mathieu Trudel-Lapierre <mathieu.trudel-lapierre@canonical.com>

(fixups and WEXT implementation by dcbw)

https://bugzilla.gnome.org/show_bug.cgi?id=742993

The newly added bond mode APIs in nm-utils will be new in 1.2, so mark
them as such in the headers and docs, move them to a new section in
libnm.ver.

Since we're adding the new section to libnm.ver, this also seems like
a good time to bump the soname.

Add version macros for NM 1.2, and change NM_VERSION_CUR_STABLE to
1.0, and NEXT_STABLE to 1.2.

Fixes: 583568e1

https://bugzilla.redhat.com/show_bug.cgi?id=1182923

https://bugzilla.gnome.org/show_bug.cgi?id=740651

https://bugzilla.gnome.org/show_bug.cgi?id=740651

https://bugzilla.gnome.org/show_bug.cgi?id=743052

Add nm_utils_setpgid() as a g_spawn*() child setup function for
calling setpgid(), and use it where appropriate rather than
reimplementing it every time.

There's no point in calling setpgid() on short-lived processes, so
remove the setpgid() calls when spawning dispatcher scripts, iptables,
iscsiadmin, and netconf.

nm-iface-helper originally used the same pthread_sigmask()-based
signal handling as NetworkManager, but was then switched to using
g_unix_signal_add(). But a little bit of unnecessary code remained.

Replace the pthread_sigwait()-based signal handling with
g_unix_signal_add()-based handling, and get rid of all the
now-unnecessary calls to nm_unblock_posix_signals() when spawning
subprocesses.

As a bonus, this also fixes the "^C in gdb kills NM too" bug.

https://bugzilla.gnome.org/show_bug.cgi?id=742588

Add CONNECTION_EXTERNAL=1 to the environment when dispatching actions
on a "generated-assumed" connection (ie, one that was created outside
of NM).

src/nm-dispatcher.c was passing the connection's D-Bus path to the
dispatcher, which was then ignoring it. Meanwhile,
test-dispatcher-envp was passing a fake D-Bus path with the wrong name
(which didn't actually matter since
nm_dispatcher_utils_construct_envp() ignored it anyway).

Fix it so that the path gets exposed as CONNECTION_DBUS_PATH, and
adjust the tests for that.

There's no reason the dispatcher test files should have "old" in their
names, since they're testing the current dispatcher interface.

Looks more like 5, not 7, unless a particular mode is selected:

There are 7 optional arguments for 'bond' connection type.
Do you want to provide them? (yes/no) [yes]
Bonding mode [balance-rr]:
Bonding monitoring mode (miimon/arp) [miimon]:
Bonding miimon [100]:
Bonding downdelay [0]:
Bonding updelay [0]:

Fixes: 53f2642c

Fixes: 76d9fc91

https://bugzilla.redhat.com/show_bug.cgi?id=1182567

In _nm_setting_new_from_dbus(), verify that the properties have the
right types, and return an error if not. (In particular, don't crash
if someone tries to assign a GBytes-valued property a non-'ay' value.)

libnm-util's nm_setting_new_from_hash() needed to call
g_type_class_ref(setting_type) to ensure that the class had been
initialized by the time we fetched its properties. But in libnm-core's
version, we create the setting object before fetching the list of
properties, so we know the class will already have been initialized by
that point.

Testing WWAN connections through a Nokia Series 40 phone, addresses of family
AF_PHONET end up triggering an assert() in object_has_ifindex(), just because
object_type_from_nl_object() only handles AF_INET and AF_INET6 address.

In order to avoid this kind of problems, we'll try to make sure that the object
caches kept by NM only store known object types.

(fixup by dcbw to use cached passed to cache_remove_unknown())

https://bugzilla.gnome.org/show_bug.cgi?id=742928

    Connect: ppp0 <--> /dev/ttyACM0
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 5 / phase 'establish'
    NetworkManager[27434]: <info>  (ppp0): new Generic device (driver: 'unknown' ifindex: 12)
    NetworkManager[27434]: <info>  (ppp0): exported as /org/freedesktop/NetworkManager/Devices/4
    [Thread 0x7ffff1ecf700 (LWP 27439) exited]
    NetworkManager[27434]: <info>  (ttyACM0): device state change: ip-config -> deactivating (reason 'user-requested') [70 110 39]
    Terminating on signal 15
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 10 / phase 'terminate'
    **
    NetworkManager:ERROR:platform/nm-linux-platform.c:1534:object_has_ifindex: code should not be reached

    Program received signal SIGABRT, Aborted.
    0x00007ffff4692a97 in raise () from /usr/lib/libc.so.6
    (gdb) bt
    #0  0x00007ffff4692a97 in raise () from /usr/lib/libc.so.6
    #1  0x00007ffff4693e6a in abort () from /usr/lib/libc.so.6
    #2  0x00007ffff4c8d7f5 in g_assertion_message () from /usr/lib/libglib-2.0.so.0
    #3  0x00007ffff4c8d88a in g_assertion_message_expr () from /usr/lib/libglib-2.0.so.0
    #4  0x0000000000472b91 in object_has_ifindex (object=0x8a8320, ifindex=12) at platform/nm-linux-platform.c:1534
    #5  0x0000000000472bec in check_cache_items (platform=0x7fe8a0, cache=0x7fda30, ifindex=12) at platform/nm-linux-platform.c:1549
    #6  0x0000000000472de3 in announce_object (platform=0x7fe8a0, object=0x8a8c30, change_type=NM_PLATFORM_SIGNAL_REMOVED, reason=NM_PLATFORM_REASON_EXTERNAL) at platform/nm-linux-platform.c:1617
    #7  0x0000000000473dd2 in event_notification (msg=0x8a7970, user_data=0x7fe8a0) at platform/nm-linux-platform.c:1992
    #8  0x00007ffff5ee14de in nl_recvmsgs_report () from /usr/lib/libnl-3.so.200
    #9  0x00007ffff5ee1849 in nl_recvmsgs () from /usr/lib/libnl-3.so.200
    #10 0x00000000004794df in event_handler (channel=0x7fc930, io_condition=G_IO_IN, user_data=0x7fe8a0) at platform/nm-linux-platform.c:4152
    #11 0x00007ffff4c6791d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
    #12 0x00007ffff4c67cf8 in ?? () from /usr/lib/libglib-2.0.so.0
    #13 0x00007ffff4c68022 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
    #14 0x00000000004477ee in main (argc=1, argv=0x7fffffffeaa8) at main.c:447
    (gdb) fr 4
    #4  0x0000000000472b91 in object_has_ifindex (object=0x8a8320, ifindex=12) at platform/nm-linux-platform.c:1534
    1534                    g_assert_not_reached ();

This reverts commit 6c1a6d2d.

Mistaken push; it'll get committed, just needs a slight fixup.

The address might be zero-size, and therefore nl_addr_get_binary_addr()
returns a pointer to a zero-size array.  We don't want to read past the
end of that array.  Since zero-size addresses really mean an address
of all zeros, just make that happen.

As an additional optimization, if the prefix length is zero, the whole
address is host bits and should be cleared.

==30286== Invalid read of size 4
==30286==    at 0x478090: clear_host_address (nm-linux-platform.c:3786)
==30286==    by 0x4784D4: route_search_cache (nm-linux-platform.c:3883)
==30286==    by 0x4785A1: refresh_route (nm-linux-platform.c:3901)
==30286==    by 0x4787B6: ip4_route_delete (nm-linux-platform.c:3978)
==30286==    by 0x47F674: nm_platform_ip4_route_delete (nm-platform.c:1980)
==30286==    by 0x4B279D: _v4_platform_route_delete_default (nm-default-route-manager.c:1122)
==30286==    by 0x4AEF03: _platform_route_sync_flush (nm-default-route-manager.c:320)
==30286==    by 0x4B043E: _resync_all (nm-default-route-manager.c:574)
==30286==    by 0x4B0CA7: _entry_at_idx_remove (nm-default-route-manager.c:631)
==30286==    by 0x4B1A66: _ipx_update_default_route (nm-default-route-manager.c:806)
==30286==    by 0x4B1A9C: nm_default_route_manager_ip4_update_default_route (nm-default-route-manager.c:813)
==30286==    by 0x45C3BC: _cleanup_generic_post (nm-device.c:7143)
==30286==  Address 0xee33514 is 0 bytes after a block of size 20 alloc'd
==30286==    at 0x4C2C080: calloc (in /usr/lib/valgrind/vgpreload_memcheck-amd64-linux.so)
==30286==    by 0x6B2B0B1: nl_addr_alloc (in /usr/lib/libnl-3.so.200.20.0)
==30286==    by 0x6B2B0E3: nl_addr_build (in /usr/lib/libnl-3.so.200.20.0)
==30286==    by 0x6B2B181: nl_addr_clone (in /usr/lib/libnl-3.so.200.20.0)
==30286==    by 0x66DB0D7: ??? (in /usr/lib/libnl-route-3.so.200.20.0)
==30286==    by 0x6B33CE6: nl_object_clone (in /usr/lib/libnl-3.so.200.20.0)
==30286==    by 0x6B2D303: nl_cache_add (in /usr/lib/libnl-3.so.200.20.0)
==30286==    by 0x472E55: refresh_object (nm-linux-platform.c:1735)
==30286==    by 0x473137: add_object (nm-linux-platform.c:1795)
==30286==    by 0x478373: ip4_route_add (nm-linux-platform.c:3846)
==30286==    by 0x47F375: nm_platform_ip4_route_add (nm-platform.c:1939)
==30286==    by 0x4AEC06: _platform_route_sync_add (nm-default-route-manager.c:254)

https://bugzilla.gnome.org/show_bug.cgi?id=742937

Testing WWAN connections through a Nokia Series 40 phone, addresses of family
AF_PHONET end up triggering an assert() in object_has_ifindex(), just because
object_type_from_nl_object() only handles AF_INET and AF_INET6 address.

In order to avoid this kind of problems, we'll try to make sure that the object
caches kept by NM only store known object types.

https://bugzilla.gnome.org/show_bug.cgi?id=742928

    Connect: ppp0 <--> /dev/ttyACM0
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 5 / phase 'establish'
    NetworkManager[27434]: <info>  (ppp0): new Generic device (driver: 'unknown' ifindex: 12)
    NetworkManager[27434]: <info>  (ppp0): exported as /org/freedesktop/NetworkManager/Devices/4
    [Thread 0x7ffff1ecf700 (LWP 27439) exited]
    NetworkManager[27434]: <info>  (ttyACM0): device state change: ip-config -> deactivating (reason 'user-requested') [70 110 39]
    Terminating on signal 15
    nm-pppd-plugin-Message: nm-ppp-plugin: (nm_phasechange): status 10 / phase 'terminate'
    **
    NetworkManager:ERROR:platform/nm-linux-platform.c:1534:object_has_ifindex: code should not be reached

    Program received signal SIGABRT, Aborted.
    0x00007ffff4692a97 in raise () from /usr/lib/libc.so.6
    (gdb) bt
    #0  0x00007ffff4692a97 in raise () from /usr/lib/libc.so.6
    #1  0x00007ffff4693e6a in abort () from /usr/lib/libc.so.6
    #2  0x00007ffff4c8d7f5 in g_assertion_message () from /usr/lib/libglib-2.0.so.0
    #3  0x00007ffff4c8d88a in g_assertion_message_expr () from /usr/lib/libglib-2.0.so.0
    #4  0x0000000000472b91 in object_has_ifindex (object=0x8a8320, ifindex=12) at platform/nm-linux-platform.c:1534
    #5  0x0000000000472bec in check_cache_items (platform=0x7fe8a0, cache=0x7fda30, ifindex=12) at platform/nm-linux-platform.c:1549
    #6  0x0000000000472de3 in announce_object (platform=0x7fe8a0, object=0x8a8c30, change_type=NM_PLATFORM_SIGNAL_REMOVED, reason=NM_PLATFORM_REASON_EXTERNAL) at platform/nm-linux-platform.c:1617
    #7  0x0000000000473dd2 in event_notification (msg=0x8a7970, user_data=0x7fe8a0) at platform/nm-linux-platform.c:1992
    #8  0x00007ffff5ee14de in nl_recvmsgs_report () from /usr/lib/libnl-3.so.200
    #9  0x00007ffff5ee1849 in nl_recvmsgs () from /usr/lib/libnl-3.so.200
    #10 0x00000000004794df in event_handler (channel=0x7fc930, io_condition=G_IO_IN, user_data=0x7fe8a0) at platform/nm-linux-platform.c:4152
    #11 0x00007ffff4c6791d in g_main_context_dispatch () from /usr/lib/libglib-2.0.so.0
    #12 0x00007ffff4c67cf8 in ?? () from /usr/lib/libglib-2.0.so.0
    #13 0x00007ffff4c68022 in g_main_loop_run () from /usr/lib/libglib-2.0.so.0
    #14 0x00000000004477ee in main (argc=1, argv=0x7fffffffeaa8) at main.c:447
    (gdb) fr 4
    #4  0x0000000000472b91 in object_has_ifindex (object=0x8a8320, ifindex=12) at platform/nm-linux-platform.c:1534
    1534                    g_assert_not_reached ();

https://bugzilla.gnome.org/show_bug.cgi?id=742823

Don't start an automatic connectivity check right when NMManager tells
us we're online; only do it if the manager doesn't request an explicit
connectivity check immediately afterward.