Introducing config option `CONFIG_ESP_NETIF_SET_DNS_PER_DEFAULT_NETIF`
to overcome LWIP limitation of using global DNS server info.
This config option enables LWIP callbacks to collect per netif DNS
server info and then restores global DNS servers of whichever network
interface is selected as default.
LWIP submodule update v5.2: git log --oneline f1746813..3a3d1fb3
- dns: Allow storing dnsserver per netif (espressif/esp-lwip@3a3d1fb3)
- api_msg: Fix unused local variable if LWIP_NETCONN_SEM_PER_THREAD=1
(espressif/esp-lwip@aa4f6e78)
- lwip: fix gcc -fanalyzer warnings (espressif/esp-lwip@4297782b)
This commit removes the lock from the list manipulation code in esp_netif_objects.c,
because we already have another lock/task context for lwip.
So the list manipulation is unsafe and safety must be assured by the stack layer
(in esp_netif_lwip).
Problems with current locking:
* implementation of locking was wrong -- lazy init style of creating the mutex is not
thread safe (and destroying it if we have no interface makes the problem exhibit very frequently)
* locking only the list won't solve issues when assessing interfaces atomically
* maintaining multiple locks is problematic, as we often switch between
lwip context and user context in internal implementation of esp_netif_lwip
Closes https://github.com/espressif/esp-idf/issues/12261
Fix dependency tree so that lwip doesn't depend on any specific network
interface component.
Network interface drivers shall depend on esp_netif.
esp_netif shall depend on lwip (but not on any specific interface
driver) -- it optionally depends on vfs and esp_eth (need ethernet
header for L2/bridge mode)
* esp-netif to optionally depend on esp-eth (only for l2tap config)
* esp_eth.h now includes the original ethernet header and the
ethernet-netif glue layer
* Updated examples and test to explicitely use esp-eth dependency if
needed
The interface name can be used in socket API, i.e. setsockopt(). The API esp_netif_get_netif_impl_name() shoudl be used to populate standard
interface structure struct ifreq.
On startup of the common interface (ethernet, wifi), the lwip netif hostname was assigned to confg value .
Fixed to assign to esp-netif hostname if it exists
Closes https://github.com/espressif/esp-idf/issues/4737
