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2016-02-15dhcp: assert the success of sd_event_now()Beniamino Galvani
The function must never fail.
2016-02-13Merge pull request #2589 from keszybz/resolve-tool-2Lennart Poettering
Better support of OPENPGPKEY, CAA, TLSA packets and tests
2016-02-11Add memcpy_safeZbigniew Jędrzejewski-Szmek
ISO/IEC 9899:1999 §7.21.1/2 says: Where an argument declared as size_t n specifies the length of the array for a function, n can have the value zero on a call to that function. Unless explicitly stated otherwise in the description of a particular function in this subclause, pointer arguments on such a call shall still have valid values, as described in 7.1.4. In base64_append_width memcpy was called as memcpy(x, NULL, 0). GCC 4.9 started making use of this and assumes This worked fine under -O0, but does something strange under -O3. This patch fixes a bug in base64_append_width(), fixes a possible bug in journal_file_append_entry_internal(), and makes use of the new function to simplify the code in other places.
2016-02-10tree-wide: remove Emacs lines from all filesDaniel Mack
This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.
2016-02-02dhcp: delay restarts after NAKsBeniamino Galvani
The server might answer to a DHCPREQUEST with a NAK and currently the client restarts the configuration process immediately. It was observed that this can easily generate loops in which the network is flooded with DISCOVER,OFFER,REQUEST,NAK sequences. RFC 2131 only states that "if the client receives a DHCPNAK message, the client restarts the configuration process" without further details. Add a delay with exponential backoff between retries after NAKs to limit the number of requests and cap the delay to 30 minutes.
2016-01-26dhcp: make host/domain name validity checks stricterLennart Poettering
Also don't permit host/domain names that reference the root domain, and unify the codepaths for this.
2016-01-21Merge pull request #2391 from keszybz/coverityDaniel Mack
Coverity inspired fixes
2016-01-20libsystemd-network: avoid double free on errorZbigniew Jędrzejewski-Szmek
This could happen if the remote sent us a badly formatted option. CID #1317206.
2016-01-20libsystemd-network: use assert_seZbigniew Jędrzejewski-Szmek
It cannot fail. CID #1320623.
2016-01-20dhcp: make DHCP6_OPTION_* enum publicBeniamino Galvani
libsystemd-network provides the public function sd_dhcp6_client_set_request_option() to enable the request of a given DHCP option. However the enum defining such options is defined in the internal header dhcp6-protocol.h. Move the enum definition to the public header sd-dhcp6-client.h and properly namespace values.
2016-01-20dhcp: make DHCP_OPTION_* enum publicBeniamino Galvani
libsystemd-network provides the public function sd_dhcp_client_set_request_option() to enable the request of a given DHCP option. However the enum defining such options is defined in the internal header dhcp-protocol.h. Move the enum definition to the public header sd-dhcp-client.h and properly namespace values.
2016-01-20dhcp: export routes as opaque objectsBeniamino Galvani
At the moment sd_dhcp_lease_get_routes() returns an array of structs which are not defined in public headers. Instead, change the function to return an array of pointers to opaque sd_dhcp_route objects.
2016-01-18sd-ndisc: simplify if stmt and reindent log messagesZbigniew Jędrzejewski-Szmek
Merge separate two error handling statements into two nested ifs. This looks cleaner, and avoids a gcc warning about *prefix being uninitialized. While at it, fix identation of logging statements elsewhere in the file.
2016-01-18sd-ndisc: simplify ndisc_prefix_newZbigniew Jędrzejewski-Szmek
If the initial allocation succeeded, there is no way to fail, so cleanup function is not necessary.
2016-01-12tree-wide: use xsprintf() where applicableDaniel Mack
Also add a coccinelle receipt to help with such transitions.
2015-12-25Merge pull request #2223 from ssahani/lldpZbigniew Jędrzejewski-Szmek
Closes #2223.
2015-12-25V3 LLDP: Add packet validation (system name and description)Susant Sahani
LLDP type system name and system description should be with in 255 characters and unique. Let's add the validation to discard corrupt packets.
2015-12-25lldp: improve loggingSusant Sahani
2015-12-02util-lib: update dns_name_to_wire_format() to optionally generate DNSSEC ↵Lennart Poettering
canonical names We'll need this later when putting together RR serializations to checksum.
2015-11-27tree-wide: expose "p"-suffix unref calls in public APIs to make gcc cleanup easyLennart Poettering
GLIB has recently started to officially support the gcc cleanup attribute in its public API, hence let's do the same for our APIs. With this patch we'll define an xyz_unrefp() call for each public xyz_unref() call, to make it easy to use inside a __attribute__((cleanup())) expression. Then, all code is ported over to make use of this. The new calls are also documented in the man pages, with examples how to use them (well, I only added docs where the _unref() call itself already had docs, and the examples, only cover sd_bus_unrefp() and sd_event_unrefp()). This also renames sd_lldp_free() to sd_lldp_unref(), since that's how we tend to call our destructors these days. Note that this defines no public macro that wraps gcc's attribute and makes it easier to use. While I think it's our duty in the library to make our stuff easy to use, I figure it's not our duty to make gcc's own features easy to use on its own. Most likely, client code which wants to make use of this should define its own: #define _cleanup_(function) __attribute__((cleanup(function))) Or similar, to make the gcc feature easier to use. Making this logic public has the benefit that we can remove three header files whose only purpose was to define these functions internally. See #2008.
2015-11-27Merge pull request #2029 from teg/network-fixesMartin Pitt
Network fixes
2015-11-25dns-domain: rework dns_label_escape() to not imply memory allocationLennart Poettering
The new dns_label_escape() call now operates on a buffer passed in, similar to dns_label_unescape(). This should make decoding a bit faster, and nicer.
2015-11-25dns-domain: simplify dns_name_is_root() and dns_name_is_single_label()Lennart Poettering
Let's change the return value to bool. If we encounter an error while parsing, return "false" instead of the actual parsing error, after all the specified hostname does not qualify for what the function is supposed to test. Dealing with the additional error codes was always cumbersome, and easily misused, like for example in the DHCP code. Let's also rename the functions from dns_name_root() to dns_name_is_root(), to indicate that this function checks something and returns a bool. Similar for dns_name_is_signal_label().
2015-11-25sd-dhcp: parse error message in DECLINE or NAKTom Gundersen
If a client sends a DECLINE or a server sends a NAK, they can include a string with a message to explain the error. Parse this and print it at debug level.
2015-11-25sd-ndisc: better validate RA packetsTom Gundersen
Verify the hoplimit and that the received packet is large enough for the RA header. See <http://tools.ietf.org/html/rfc4861#section-6.1.2>.
2015-11-25sd-ndisc: always send the link-layer addressTom Gundersen
We never send packets without first knowing the link-local L3 address, so we should always include the L2 address in RS packets.
2015-11-25libsystemd-network: clean up recv functionsTom Gundersen
2015-11-19Merge pull request #1947 from phomes/sort-includes2Lennart Poettering
tree-wide: sort includes in *.h
2015-11-19nd-ndisc: don't fail if src address is unsetTom Gundersen
This happens when running our test-suite over a socketpair, so don't fall over in that case. Fixes issue #1952.
2015-11-19Merge pull request #1931 from bengal/dhcp-fqdn-v2Tom Gundersen
libsystemd-network: add support for "Client FQDN" DHCP option (v2)
2015-11-19sd-ndisc: drop RA packets from non-link-local addressesTom Gundersen
See https://tools.ietf.org/html/rfc4861#section-4.2. Some routers (dnsmasq) will send packets from global addresses, which would break the default route setup, so ignore those. This is also what the kernel does.
2015-11-18tree-wide: sort includes in *.hThomas Hindoe Paaboel Andersen
This is a continuation of the previous include sort patch, which only sorted for .c files.
2015-11-17Merge pull request #1920 from teg/networkd-fixesMartin Pitt
networkd fixes
2015-11-17libsystemd-network: add support for "Client FQDN" DHCP optionBeniamino Galvani
This adds support for the Client Fully Qualified Domain Name (FQDN) option [RFC 4702] to libsystemd-network. The option can be used to exchange information about a DHCPv4 client's fully qualified domain name and about responsibility for updating the DNS RR related to the client's address assignment. Other popular DHCP clients (dhclient, dhcpcd) support this option and it would be useful to have it in networkd too.
2015-11-17sd-dhcp6-client: bind to link-local addressTom Gundersen
This ensures that several DHCPv6 clients can run on separate interfaces simultaneously.
2015-11-17sd-dhcp6-client: allow multiple clients on hostTom Gundersen
We need to enable SO_REUSEADDR in order for several sockets to be allowed to bind to the same port (even on different links).
2015-11-17Merge pull request #1926 from phomes/include-order-libudevDaniel Mack
tree-wide: group include of libudev.h with sd-*
2015-11-17tree-wide: group include of libudev.h with sd-*Thomas Hindoe Paaboel Andersen
2015-11-17sd-ipv4ll: fix error path if sd-ipv4acd allocation failsLennart Poettering
Let's make sure the destructor cannot hit the n_ref == 0 case.
2015-11-17Merge pull request #1923 from zonque/siphashLennart Poettering
siphash24: let siphash24_finalize() and siphash24() return the result…
2015-11-16siphash24: let siphash24_finalize() and siphash24() return the result directlyDaniel Mack
Rather than passing a pointer to return the result, return it directly from the function calls. Also, return the result in native endianess, and let the callers care about the conversion. For hash tables and bloom filters, we don't care, but in order to keep MAC addresses and DHCP client IDs stable, we explicitly convert to LE.
2015-11-16tree-wide: sort includesThomas Hindoe Paaboel Andersen
Sort the includes accoding to the new coding style.
2015-11-16networkd: ndisc/dhcpv6 - handle starting running clientsTom Gundersen
The clients may be triggered to be started repeatedly without being stopped first, simply swallow the error rather than failing the link.
2015-11-16siphash24: change result argument to uint64_tMartin Pitt
Change the "out" parameter from uint8_t[8] to uint64_t. On architectures which enforce pointer alignment this fixes crashes when we previously cast an unaligned array to uint64_t*, and on others this should at least improve performance as the compiler now aligns these properly. This also simplifies the code in most cases by getting rid of typecasts. The only place which we can't change is struct duid's en.id, as that is _packed_ and public API, so we can't enforce alignment of the "id" field and have to use memcpy instead.
2015-11-13networkd: dhcp6 - don't log about losing a lease we never hadTom Gundersen
2015-11-12sd-ndisc: add missing parensTom Gundersen
Reported by Thomas Andersen.
2015-11-11networkd: ndisc - handle router advertisement in userspaceTom Gundersen
Router Discovery is a core part of IPv6, which by default is handled by the kernel. However, the kernel implementation is meant as a fall-back, and to fully support the protocol a userspace implementation is desired. The protocol essentially listens for Router Advertisement packets from routers on the local link and use these to configure the client automatically. The four main pieces of information are: what kind (if any) of DHCPv6 configuration should be performed; a default gateway; the prefixes that should be considered to be on the local link; and the prefixes with which we can preform SLAAC in order to pick a global IPv6 address. A lot of additional information is also available, which we do not yet fully support, but which will eventually allow us to avoid the need for DHCPv6 in the common case. Short-term, the reason for wanting this is in userspace was the desire to fully track all the addresses on links we manage, and that is not possible for addresses managed by the kernel (as the kernel does not expose to us the fact that it manages these addresses). Moreover, we would like to support stable privacy addresses, which will soon be mandated and the legacy MAC-based global addresses deprecated, to do this well we need to handle the generation in userspace. Lastly, more long-term we wish to support more RA options than what the kernel exposes.
2015-11-11sd-ndisc: introduce separate callbacksTom Gundersen
As the data passed is very different, we introduce four different callbacks: - Generic - router discovery timed out or state machine stopped - Router - router and link configuration received - Prefix onlink - configuration for an onlink prefix received - Prefix autonomous - configuration for to configure a SLAAC address for a prefix received
2015-11-11sd-ndisc: notify user on STOPTom Gundersen
Also, stop the state machine when we get into a broken state, rather than just notify the user.
2015-11-11sd-dhcp6-client: add is_running() methodTom Gundersen