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path: root/src/libsystemd-network/sd-dhcp-client.c
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2015-09-22sd-dhcp: fix namespacingDavid Herrmann
Prefix all constants with SD_DHCP_CLIENT_* to avoid namespacing conflicts.
2015-08-27dhcp: don't underflow in lease time calculationsLennart Poettering
Don't underflow when calculating lease time.
2015-08-27dhcp: NTP servers should be requested by networkd but not implicitly by sd-dhcpLennart Poettering
The library so far always requested the NTP servers. This might be unnecessary in some uses, hence let's move the request into networkd instead.
2015-08-27dhcp: clean up dhcp4 lease objectLennart Poettering
a) drop handling of obsolete or unused DHCP options time_offset, mtu_aging_timeout, policy filter, mdr, ttl, ip forwarding settings. Should this become useful one day we can readd support for this. b) For subnet mask and broadcast it is not always clear whether 0 or 255.255.255.255 might be valid, hence maintain a boolean indicating validity next to it. c) serialize/deserialize broadcast address, lifetime, T1 and T2 together with the rest of the fields in dhcp_lease_save() and dhcp_lease_load(). d) consistently return ENODATA from getter functions for data that is missing in the lease. e) add missing getter calls for broadcast, lifetime, T1, T2. f) when decoding DHCP options, generate debug messages on parse failures, but try to proceed if possible. g) Similar, when deserializing a lease in dhcp_lease_load(), make sure we deal nicely with unparsable fields, to provide upgrade compat. h) fix some memory allocations
2015-08-26dhcp: stop using refcnt.hLennart Poettering
No need to invole atomic ops in single-threaded APIs, let's simplify this.
2015-08-26sd-dhcp: don't randomly ref objectsDavid Herrmann
In our API design, getter-functions don't ref objects. Calls like foo_get_bar() will not ref 'bar'. We never do that and there is no real reason to do it in single threaded APIs. If you need a ref-count, you better take it yourself *BEFORE* doing anything else on the parent object (as this might invalidate your pointer). Right now, sd_dhcp?_get_lease() refs the lease it returns. A lot of code-paths in systemd do not expect this and thus leak the lease reference. Fix this by changing the API to not ref returned objects.
2015-06-17sd-dhcp-client: readd deleted error checkThomas Hindoe Paaboel Andersen
Seems to have been removed by mistake in: 9021bb9f935c93b516b10c88db2a212a9e3a8140
2015-06-10util: introduce CMSG_FOREACH() macro and make use of it everywhereLennart Poettering
It's only marginally shorter then the usual for() loop, but certainly more readable.
2015-04-12dhcp: yes, infiniband has the larger MAC address length, but let the ↵Lennart Poettering
compuler figure that out...
2015-04-11shared: add random-util.[ch]Ronny Chevalier
2015-04-10Revert "sd-dhcp-client: fix strict aliasing issue"Lennart Poettering
This reverts commit 6ec8e7c763b7dfa82e25e31f6938122748d1608f. This doesn't fix any issues, just makes the code harder to read.
2015-03-14sd-dhcp-client: fix strict aliasing issueShawn Landden
2015-02-23remove unused includesThomas Hindoe Paaboel Andersen
This patch removes includes that are not used. The removals were found with include-what-you-use which checks if any of the symbols from a header is in use.
2015-02-12Revert "tree-wide: Always use recvmsg with MSG_CMSG_CLOEXEC"Lennart Poettering
This reverts commit d6d810fbf8071f8510450dbacd1d083f37603656. It's apparently not OK to pass MSG_CMSG_CLOEXEC to recvmsg() of raw sockets.
2015-02-10tree-wide: Always use recvmsg with MSG_CMSG_CLOEXECCristian Rodríguez
2015-01-22sd-dhcp-client: use RFC4361-complient ClientID by defaultTom Gundersen
In addition to the benefits listed in the RFC, this allows DHCP to work also in case several interfaces share the same MAC address on the same link (IPVLAN). Note that this will make the ClientID (so probably the assigned IP address) change on upgrades. If it is desired to avoid that we would have to remember and write back the ID (which the library supports, but networkd currently does not).
2015-01-22Assorted format fixesZbigniew Jędrzejewski-Szmek
Types used for pids and uids in various interfaces are unpredictable. Too bad.
2015-01-13refcnt: refcnt is unsigned, fix comparisonsTom Gundersen
This does not make a difference, but the code was confusing.
2014-12-30tree-wide: spelling fixesVeres Lajos
https://github.com/vlajos/misspell_fixer https://github.com/torstehu/systemd/commit/b6fdeb618cf2f3ce1645b3315f15f482710c7ffa Thanks to Torstein Husebo <torstein@huseboe.net>.
2014-12-11sd-dhcp-client: log if we fail to set up lease timersTom Gundersen
2014-11-19sd-dhcp-lease: load/save client IDDan Williams
The lease is usually tied to the client ID, so users of the lease may want to know what client ID it was acquired with.
2014-11-19sd-dhcp-client: allow getting/setting the client IDDan Williams
The client identifier can be in many different formats, not just the one that systemd creates from the Ethernet MAC address. Non- ethernet interfaces may have different client IDs formats. Users may also have custom client IDs that the wish to use to preserve lease options delivered by servers configured with the existing client ID.
2014-11-18sd-dhcp-client: fix REBOOT state handlingDan Williams
client->secs wasn't getting set in the REBOOT state, causing an assertion. REBOOT should work the same way as INIT, per RFC 2131: secs 2 Filled in by client, seconds elapsed since client began address acquisition or renewal process. REBOOT is necessary because some DHCP servers (eg on home routers) do not hand back the same IP address unless the 'ciaddr' field is filled with that address, which DISCOVER cannot do per the RFCs. This leads to multiple leases on machine reboot or DHCP client restart.
2014-11-04sd-event: rename sd_event_source_set_name() to sd_event_source_get_name()Lennart Poettering
To mirror the recent name change of the concept for sd_bus objects, follow the same logic for sd_event_source objects, too.
2014-10-31sd-dhcp-client: clean up raw socket sd_event_source when creating new UDP socketDan Williams
The raw socket sd_event_source used for DHCP server solicitations was simply dropped on the floor when creating the new UDP socket after a lease has been acquired. Clean it up properly so we're not still listening and responding to events on it.
2014-10-11sd-dhcp-client: support non-Ethernet hardware addressesDan Williams
Like Infiniband. See RFC 4390 section 2.1 for details on DHCP and Infiniband; chaddr is zeroed, hlen is set to 0, and htype is set to ARPHRD_INFINIBAND because IB hardware addresses are 20 bytes in length.
2014-08-29Fix a few typos in log messagesRuben Kerkhof
2014-08-28sd-event: name event sources used in librariesTom Gundersen
This should help in debugging failing event sources.
2014-08-15util: never use ether_ntoa(), since it formats with %x, not %02x, which ↵Lennart Poettering
makes ethernet addresses look funny
2014-08-01sd-dhcp-client: allow the max dhcp message size to be set to the MTU of the linkTom Gundersen
2014-07-28sd-dhcp-client: add support for FORCERENEWTom Gundersen
This partially implements RFC3203. Note that we are not fully compliant as we do not support authentication.
2014-07-28sd-dhcp-client: listen on UDP socket as soon as a lease is acquiredTom Gundersen
This is necessary in order to listen for FORCERENEW events.
2014-07-28sd-dhcp-client: drop event DHCP_EVENT_NO_LEASETom Gundersen
Keep this internal to the client and simply restart it when NAK is receieved, as per the RFC.
2014-07-28sd-dhcp-client: only verify UDP messagesTom Gundersen
RAW messages are verified by the BPF in the kernel.
2014-07-24libsystemd-network: use CLOCK_BOOTTIME instead of CLOCK_MONOTONIC where possibleTom Gundersen
The timeouts in the networking library (DHCP lease timeouts and similar) should not be affected by suspend. In the cases where CLOCK_BOOTTIME is not implemented, it is still safe to fallback to CLOCK_MONOTONIC, as the consumers of the library (i.e., networkd) _should_ renew the leases when coming out of suspend.
2014-07-15sd-dhcp-client: make request broadcasts opt-inTom Gundersen
It appears there is no good way to decide whether or not broadcasts should be enabled, there is hardware that must have broadcast, and there are networks that only allow unicast. So we give up and make this configurable. By default, unicast is used, but if the kernel were to inform us abotu certain interfaces requiring broadcast, we could change this to opt-in by default in those cases.
2014-07-14networkd: dhcp add vendor class indentifier option 60Susant Sahani
Vendor Class Identifier be used by DHCP clients to identify their vendor type and configuration. When using this option, vendors can define their own specific identifier values, such as to convey a particular hardware or operating system configuration or other identifying information. Vendor-specified DHCP options—features that let administrators assign separate options to clients with similar configuration requirements. For example, if DHCP-aware clients for example we want to separate different gateway and option for different set of people (dev/test/hr/finance) in a org or devices for example web/database servers or let's say in a embedded device etc and require a different default gateway or DNS server than the rest of clients.
2014-07-07dhcp-network: add check for DHCP.chaddrMichal Sekletar
Check that received DHCP packets actually include our MAC address in chaddr field. BPF interpreter has 32 bit wide registers but MAC address is 48 bits long so we have to do check in two steps.
2014-07-01networkd: send hostname to dhcp serverEugene Yakubovich
Send hostname (option 12) in DISCOVER and REQUEST messages so the DHCP server could use it to register with dynamic DNS and such. To opt-out of this behaviour set SendHostname to false in [DHCP] section of .network file [tomegun: rebased, made sure a failing set_hostname is a noop and moved config from DHCPv4 to DHCP]
2014-06-29sd-dhcp-client: don't fail hard if UDP socket can not be boundTom Gundersen
Even if we cannot renew the lease at T1, we will likely succeed at T2, so warn and ignore the failure. This could happen if for whatever reason the received address is not yet configured, or it has been lost.
2014-06-29sd-dhcp-client/networkd: set lifetimes for IPv4 addressesPatrik Flykt
Note that /proc/sys/net/ipv4/ip_dynaddr needs to be non-zero. [tomegun: hook up DHCP renew events to increase the lifetime when necessary]
2014-06-24sd-dhcp-client: return NULL from _unref() like the other sd-* librariesTom Gundersen
Let's keep this behavior consistent across our libraries. In order to keep the refcounting working, a DONT_DESTROY macro similar to the one in sd-bus was introduced.
2014-06-18sd-dhcp-client: check return from dhcp_option_appendThomas Hindoe Paaboel Andersen
2014-06-13sd-dhcp-client: fix invalid free() in client_send_request()Andreas Henriksson
static int client_send_request(...) in ./src/libsystemd-network/sd-dhcp-client.c tries to initialize "request" by calling client_message_init(...), which has atleast 5 error cases where it can return without that happening. This leads to the function finishing without "request" being initialized.
2014-06-03sd-dhcp-client: allways request broadcastCamilo Aguilar
On systems which cannot receive unicast packets until its IP stack has been configured we need to request broadcast packets. We are currently not able to reliably detect when this is necessary, so set it unconditionally for now. This is set on all packets, but the DHCP server will only broadcast the packets that are necessary, and unicast the rest. For more information please refer to this thread in CoreOS: https://github.com/coreos/bugs/issues/12 [tomegun: rephrased commit message]
2014-05-25Use %m instead of strerror(errno) where appropiateCristian Rodríguez
2014-05-21sd-dhcp-client: factor out dhcp packet allocationTom Gundersen
2014-05-21sd-dhcp: rely on FIONREAD workingTom Gundersen
This fallback will anyway never get tested, so rip it out.
2014-05-21sd-dhcp: option_append - support falling back to 'sname' and 'file'Tom Gundersen
2014-05-20sd-dhcp: refactor dhcp_option_appendTom Gundersen
Store a pointer to the options in the DHCPMessage struct, and pass this together with an offset around, rather than a uint8_t**. This avoids us having to (re)compute the pointer; and changes dhcp_option_append from adjusting both the pointer to the next option and the remaining size of the options, to just adjusting the current offset. This makes the code a bit simpler to follow IMHO, but there should be no functional change.
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