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* Rename Master to ManagerRoy Marples2021-02-02
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* eloop: Make the API more like native poll/kqueue/epollRoy Marples2021-02-02
| | | | | | | | | Just have the one callback, but return an abstracted event mask to work out if we can read/write have something else. Log diagnostics if the event mask is unexpected. While here add more logging if we fail to register an event to monitor.
* A belated welcome to 2021Roy Marples2021-01-31
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* BSD: Implement kqueue(2) for eloop (again)Roy Marples2021-01-28
| | | | | | | | kqueue allows for O(1) processing of active fd's an a more robust signal handling method without the need to use global variables to avoid calling functions during signal delivery. The problems with the prior implemenation have now been fixed.
* WhitespaceRoy Marples2021-01-27
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* DHCP: Split hardware address randomisation out of anonymous optionRoy Marples2020-12-28
| | | | A 3rd party might want to control the randomisation.
* dhcpcd: Don't roam when anonymous is setRoy Marples2020-12-27
| | | | We can now remove the NOCARRIER_PRESERVE_IP define.
* Adjust prior to build routes and run script after aborting protocols for roamingRoy Marples2020-12-27
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* hooks: add NOCARRIER_ROAMING reasonRoy Marples2020-12-27
| | | | | | | | | | | | | | | | | | | | | This is given when the OS supports the concept of wireless roaming or the IP setup can be persisted when the carrier drops. When this happens, routes are moved to a higher metric (if supported) to support non preferred but non roaming routes. The `interface_order` hook variable will now order the interfaces according to priority and move roaming interfaces to the back of the list. If resolvconf is present then it is called with the -C option to deprecate DNS and if carrier comes back it is called again with the -c option to activate it once more. As part of this change, default route metrics have been changed to support a larger number of interfaces. base metric 1000 (was 200) wireless offset 2000 (was 100) IPv4LL offset 1000000 (was 10000) roaming offset 2000000
* src/dhcpcd.c: fix build without fork or signals (#20)Fabrice Fontaine2020-12-26
| | | | | | | | | | | Since version 9.3.3 and commit a5348dd02c86fa940cd93f203d0aa974cae0563c, build without fork or signals fails on: dhcpcd.c: In function ‘main’: dhcpcd.c:2261:3: error: label ‘start_master’ used but not defined goto start_master; ^~~~ Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
* link: Report errors obtaining recv buffer size on link overflowRoy Marples2020-12-12
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* link: Only report hardware address changes for active interfacesRoy Marples2020-12-12
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* Linux: Support wireless IP roamingRoy Marples2020-12-12
| | | | | | | | | | | | | | This is achieved by checking that the interface is wireless, IFF_UP and IFF_LOWER_UP are present, but IFF_RUNNING is missing. This gives exactly the same support as modern NetBSD when carrier loss is detected, but without the address verifications when the carrier comes back as that needs to be handled in the kernel. While IP setup is maintained, other configuration data is discarded. Note that this should be improved in the future. Thanks to Boris Krasnovskiy <borkra@gmail.com> for helping with this.
* Don't stop control in testRoy Marples2020-11-25
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* options: Allow duid to take a valueRoy Marples2020-11-25
| | | | If a value is given, it overrides /var/db/dhcpcd/duid.
* options: allow --ia_na=1 and --ia_pd=2 on the command lineRoy Marples2020-11-25
| | | | This only works for non master mode.
* Improve readability.Roy Marples2020-11-21
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* dhcpcd: Don't create launcher process if keeping in foregroundRoy Marples2020-11-11
| | | | There is little point.
* control: create an unpriv socket for non master modeRoy Marples2020-11-11
| | | | This allows `dhcpcd -U4 eth0` to work once more.
* Fix compile without various definesRoy Marples2020-10-30
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* log: Allow logopen to be called without logcloseRoy Marples2020-10-30
| | | | | | | | | logclose is meant to free resources. On Linux this means that _log_prog is also free'd and once in the chroot we cannot work it out again. As such allow logopen to close what it needs to so that reopening works.
* privsep: Allow logfile reopening in a chrootRoy Marples2020-10-30
| | | | | | Now that only the privileged actioneer does the actual logging we can safely reopen the file we are logging to. This also closes and re-opens the syslog connection.
* privsep: Send all log messages to the privileged actioneerRoy Marples2020-10-30
| | | | | | | | | | | | | | | | | | | | | | | If dhcpcd starts and no syslogd implementation is running then various syscall filters could be triggered when dhcpcd wants to syslog and it's already in a chroot. Not all libc openlog implementations support LOG_NDELAY and openlog does not return an error code and can also mask errno back to 0. So we have no way of knowing if we have a syslog connection or not. This means we cannot cache the connection at startup because syslog itself will try and open if no connection. As such, all logging is now directed to the dhcpcd privileged actioneer process which will handle all the syslog and log file writing actions. The only downside of this approach (other than an extra fd per process) is that we no longer know which PID raised the message. While we could put the correct PID in the logfile as we control the API, we cannot put it into syslog as we cannot control that API. As all privsep errors should log which function they came from this will hopefully not be an issue as on the happy path only the master process will log stuff.
* BSD doesn't use envpRoy Marples2020-10-10
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* setproctitle compat requires envp, not environRoy Marples2020-10-10
| | | | | The two could be different! envp is NOT C or POSIX standard, but does appear to be a UNIX standard.
* compat: Use libbsd's setproctitle(3)Roy Marples2020-10-09
| | | | | | | | | Linux PRCTL variant, although more light weight, doesn't work on some kernels. This weighs in around 1k more, but always works. It does play around with environ and args but unlike other similar variants doesn't appear to stamp on what you actually use in the program.
* privsep: Improve rights on launcher fork and stderr fdsRoy Marples2020-10-07
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* privsep: Only log chrooting from the launcher processRoy Marples2020-10-07
| | | | | | And the sandbox tech as well. Rework stop_interface so we can reuse an option for marking a process as the launcher.
* dhcpcd: Simplify the link handling even moreRoy Marples2020-10-07
| | | | | | | Move the IS_LINK_UP macro to if_is_link_up function to reduce binary size. Rather than DHCPCD_LINK option controlling the carrier state, use it in if_is_link_up to determine the outcome.
* dhcpcd: Simplify carrier handling more by using IS_LINK_UP macroRoy Marples2020-10-06
| | | | | | Removes the need for the LINK_DOWN_IFFUP state. While here, remove the check for IFF_RUNNING when LINK_UNKNOWN because that is OS specific.
* Don't log backticks.Roy Marples2020-10-03
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* BSD: Fix compile for non NetBSDRoy Marples2020-09-30
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* BSD: struct if_data->ifi_link_state is the single source of truthRoy Marples2020-09-28
| | | | | | | | | | | | | | | | | | | | | | | | Vastly improve and simplify link detection on BSD. dhcpcd either examines the whole system via getifaddrs(3) or reacts to events via route(4). In both cases we have struct if_data which has ifi_link_state. Armed with this knowledge, we no longer need SIOCGIFDATA or SIOCGIFMEDIA. To solve the issue of newly attached interfaces having LINK_STATE_UNKNOWN or some interfaces not even changing it, we only change the local knowledge of interface flags when reports them by getifaddrs(3) or route(4) when we change them. For example, if we set IFF_UP and it succeeds we don't set this internally until reported by the kernel as above. This keeps flags and link state in sync with each other. The hope is that the kernel can set the real link state before it reports IFF_UP. As such, we no longer require the poll option or need to enter a tight loop for old interfaces.
* Clean up some warnings.Sascha Wildner2020-09-24
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* dhcpcd: log carrier lost once moreRoy Marples2020-09-22
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* Try and track link state better, regardless of if we're usingRoy Marples2020-09-21
| | | | the interface or not.
* privsep: Don't remove pidfile at exitRoy Marples2020-09-20
| | | | The privileged actioneer will remove it.
* privsep: Send signal from launcher to master over the socketRoy Marples2020-09-20
| | | | | rather than using kill which is not permitted in capsicum. This also allows us to drop the proc pledge.
* privsep: sandbox the launcher processRoy Marples2020-09-20
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* Adjust prior so that message is logged before starting devRoy Marples2020-09-19
| | | | Also add os_init incase other os need similar in the future.
* dhcpcd: Only manipulate stdin, stdout and stderr when validRoy Marples2020-09-12
| | | | | | | | | UNIX application expect these to exist even if pointed at /dev/null. We cannot change which fd they use, it's always 0, 1 and 2. But if these fd's are not open when dhcpcd is called, they could be assigned to dhcpcd internals. In this instance we should not use the streams in anyway or form.
* dhcpcd: avoid privsep errors if we error locking the pidfileRoy Marples2020-09-11
| | | | | Should not happen on the happy path, but if it does, tidy the resultant errors.
* privsep: dump leases in a sandboxRoy Marples2020-09-06
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* dhcpcd: stderr callback fd may the reset by peerRoy Marples2020-09-06
| | | | When the process exits which is normal.
* privsep: Dump leases from stdin in a limited sandboxRoy Marples2020-09-06
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* FreeBSD: Don't rights limit stderrRoy Marples2020-09-06
| | | | | Otherwise some utils in scripts will error with insufficient capabilities.
* dhcpcd: Redirect stdout/stderr to the launcher stderr descriptorRoy Marples2020-09-06
| | | | | | | | | | | | | | | This actually make life really simple! We no longer need to redirect stdout/stderr to /dev/null for privsep and any script output is now captured again - and it all goes to stderr as it should even if a script wants it to go to stdout. On the happy path, only the master process will actually log anything to stderr so we turn that off after we "fork". On the unhappy path, logging to stderr/stdout *may* fail because the launcher process *may* have exited. We *could* have the master process as an intermediary but that's just excess code to avoid errors which *should* not happen. Regardless, any errror should still hit syslog.
* privsep: Fix prior for FreeBSD.Roy Marples2020-09-05
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* dhcpcd: Setup a socketpair in the launcher to write to stderrRoy Marples2020-09-05
| | | | | | | | | Rather than duping stderr down to the processes. This allows us to reopen stdout and stderr onto /dev/null right away and means only the launcher process writes to stderr. The downside is that any stdout from the script is now lost. If that's needed, we could setup a stdout socketpair as well.
* dhcpcd: Rename function for prior now it no longer initsRoy Marples2020-08-31
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