So far there was no dedicated mechanism for replacing DNS servers with
new list. Add dns_resolve_reconfigure() API that allows to achieve that
in a thread-safe manner.
Introduce 3rd state in DNS context lifetime by converting from 'bool
is_used' to 'enum dns_resolve_context_state state'. This new
DEACTIVATING state allows to mark a DNS context as busy and safely close
context without holding lock. Closing DNS context with released lock
prevents deadlock in case net_context_close() has to synchronize with a
separate thread executing handler passed to net_context_recv() (which is
the case for example with ESP-AT WiFi driver).
Signed-off-by: Marcin Niestroj <m.niestroj@grinn-global.com>
Switch to the new API for delayed work related to DNS queries.
In the previous solution it was assumed that the work item could be
immediately cancelled at the point the query slot was released. This
is not true. We need a secondary condition to record the fact that
the query was completed while the work item was still pending, and an
additional check to detect when the work item completed and the slot
reclaimed.
Also annotate functions to indicate when they require the lock on
query content to be held, add some helpers that abstract core
operations like invoking a callback or releasing a query slot, and fix
some more cases where query slot content was accessed outside of the
new lock infrastructure.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
API documentation for parameters that accept a duration specified in
milliseconds is updated to replace references to K_NO_WAIT with 0, and
K_FOREVER with SYS_FOREVER_MS.
Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
As mDNS requests set DNS id to 0, we cannot use it to match
the DNS response packet. In order to allow this functionality,
create a hash from query name and type, and use that together
with DNS id to match request and response.
Fixes#21914
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Any word started with underscore followed by and uppercase letter or a
second underscore is a reserved word according with C99.
Signed-off-by: Flavio Ceolin <flavio.ceolin@intel.com>
This implements LLMNR client from RFC 4795. This means that caller
is able to resolve DNS resource records using multicast DNS.
The LLMNR is used in Windows networks.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
In some cases, we need to initialize DNS servers from a binary
addresses, e.g. in case of DHCP processing. With existing API,
such addresses would need to be converted to strings, just to
be converted back to struct sockaddr in dns_resolve_init().
This is not efficient, and with a number of addresses quite
cumbersome. So instead, allow to pass DNS server either as
strings, or as struct sockaddr's (or both).
Signed-off-by: Paul Sokolovsky <paul.sokolovsky@linaro.org>
This implements mDNS client from RFC 6762. What this means that
caller is able to resolve "hostname.local" names using multicast DNS.
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
The ai_flags, ai_socktype and ai_protocol fields are removed as there
is currently no use for them. These can be added back later if really
needed.
Reordering the fields at the same time which caused 4 bytes to be saved
in storage space.
Jira: ZEP-2065
Change-Id: Ida1dcfb6afed73733d3db9cf4d07e771d31ee314
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Convert code to use u{8,16,32,64}_t and s{8,16,32,64}_t instead of C99
integer types.
Jira: ZEP-2051
Change-Id: I4ec03eb2183d59ef86ea2c20d956e5d272656837
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
DNS resolving is better done with DNS resolve API so remove
the DNS client API which is quite hard to use.
Change-Id: Ide4973a5be674414ea6e04a35c938195cce40b6a
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Make sure that CONFIG_DNS_RESOLVER_MAX_SERVERS and
CONFIG_DNS_NUM_CONCUR_QUERIES are defined even if
CONFIG_DNS_RESOLVER is not enabled. This fixes compilation
error in this special case.
Change-Id: Icf1f247c138c379246ece57e78b04e70ae43cc1e
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
Applications should normally use these functions as then the system
wide DNS server settings are used.
Change-Id: I2c1fc7c7c881081506d21c3d37628d5c3dcc6aaa
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
If the config file contains DNS server addresses, then
configure the DNS resolver to use them.
Change-Id: Ie7f2bdcf7ac4bb7ee0ecf7fb5b7bd2df3379cdc3
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit introduces a generic DNS resolving API that can
be used by applications. Later commits will introduce a system
level DNS support which simplifies the DNS resolving so that
DNS server names can be given from config file.
Change-Id: I60fbc81e2a44928d2ca53d51e703b9cde222b382
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
