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Previously we'd open the connection in the originating namespace, which
meant most peers of the bus would not be able to make sense of the
PID/UID/... identity of us since we didn't exist in the namespace they
run in. However they require this identity for privilege decisions,
hence disallowing access to anything from the host.
Instead, when connecting to a container, create a temporary subprocess,
make it join the container's namespace and then connect from there to
the kdbus instance. This is similar to how we do it for socket
conections already.
THis also unifies the namespacing code used by machinectl and the bus
APIs.
Due to this patch, sd_bus_release_name() function
returns the same code errors for kdbus and dbus1
if we try release non-existing name or foreign
name.
The pattern of unreffing an IO event source and then closing its fd is
frequently seen in even source callbacks. Previously this likely
resultet in us removing the fd from the epoll after it was closed which
is problematic, since while we were dispatching we always kept an extra
reference to event source objects because we might still need it later.
This way it is easy to only exclude directories from the current boot
from automatic clean up in /var/tmp.
Also, pick a longer name for the directories so that are globs in
tmp.conf can be simpler yet equally accurate.
With this change a failing event source handler will not cause the
entire event loop to fail. Instead, we just disable the specific event
source, log a message at debug level and go on.
This also introduces a new concept of "exit code" which can be stored in
the event loop and is returned by sd_event_loop(). We also rename "quit"
to "exit" everywhere else.
Altogether this should make things more robus and keep errors local
while still providing a way to return event loop errors in a clear way.
test-fileio/test-strv:
Use the streq_ptr to make build-scan not worry about passing in a null
to a nonnull function.
test-dhcp-option:
Prevent a theoretical null pointer dereference
Which does have TimeUSec. Should we specifically check for this method
instead of assuming time=0 means it doesn't exist?
Before:
shawn@debian-T61:~/git/systemd$ ./timedatectl
Local time: Wed 1969-12-31 16:00:00 PST
Universal time: Thu 1970-01-01 00:00:00 UTC
RTC time: n/a
Timezone: America/Los_Angeles (PST, -0800)
NTP enabled: n/a
NTP synchronized: no
RTC in local TZ: no
DST active: no
Last DST change: DST ended at
Sun 1969-10-26 01:59:59 PDT
Sun 1969-10-26 01:00:00 PST
Next DST change: DST begins (the clock jumps one hour forward) at
Sun 1970-04-26 01:59:59 PST
Sun 1970-04-26 03:00:00 PDT
After:
shawn@debian-T61:~/git/systemd$ ./timedatectl
Local time: Wed 2013-12-11 14:03:21 PST
Universal time: Wed 2013-12-11 22:03:21 UTC
RTC time: n/a
Timezone: America/Los_Angeles (PST, -0800)
NTP enabled: n/a
NTP synchronized: no
RTC in local TZ: no
DST active: no
Last DST change: DST ended at
Sun 2013-11-03 01:59:59 PDT
Sun 2013-11-03 01:00:00 PST
Next DST change: DST begins (the clock jumps one hour forward) at
Sun 2014-03-09 01:59:59 PST
Sun 2014-03-09 03:00:00 PDT
Process a DHCP Ack/Nak in much the same way as an DHCP Offer. Factor
out header verification and process options sent. Add notification
functionality with discrete values for the outcome of the DHCP Ack/
Nak processing.
Add maximum message size option to keep some DHCP server implementations
from sending too big messages. See ConnMan commit
0c5c862749c05193cf4c513628328c6db02b5222.
Create and send a DHCP Request message reusing already existing parts
of the code. This causes factoring out IP and UDP header creation and
moving next timeout calculation to be done every time in the timer
callback function independent of DHCP state. Also add an exponential
part to the timer calculation, bail out if there are errors while
resending the DHCP message for the sixth or more times.
Create a function for handling the full IP, UDP and DHCP packet
and tie it to the main loop. Verify IP and UDP headers and checksum.
Creat a new lease structure with using the values supplied in the
DHCP message. Free the lease structure when client is stopped.
Split out socket handling into a creation and a sending part. As a
result modify the test code.
Require a main loop to be set when creating a DHCP client. Set up
a timer to resend DHCP Discover messages and add a 0-2 second
delay to the timeout value. Move to state Selecting after successful
sending of a Discover message.
