Make use of lwip_netif pointer for setting the default interface in lwip,
since the is a generic pointer used in I/O functions wheras the former is always the type.
More importantly the netif_handle could be set to another context ptr
used in I/O functions, as as for the SLIP netif.
This change fixes the issue of incorrect settings of a default interface
if any SLIP netif is involved.
Closes https://github.com/espressif/esp-idf/issues/7246
Added lwIP hooks which could be optionally overwritten in the
application code. These three options are provided in Kconfig:
* NONE: No hook support
* DEFAULT: Default implementation is provided. If IDF doesn't
have a specific hook implementation, an empty stub is provided, which
could be overwritten by strong implementation in application code.
* CUSTOM: Hooks are declared only to be implemented in application code.
Merges https://github.com/espressif/esp-idf/pull/6034
When setting hostname using esp_netif_set_hostname_api() failed for some reason, the netif pointer might be freed while lwip pointer stil point to that location and could be used. Fixed by moving the freeing and string duplication to the block where lwip hostname is set.
Closes https://github.com/espressif/esp-idf/issues/6048
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.
Use the configured esp-netif netmask to update the dhcp struct when
starting the server or starting the netif itself.
Use the netmask in dhcps setters and getters.
calling esp_netif_up() and esp_netif_down() was not supported if the
underlying netif wos of ppp type. Updated the code to enable setting
these interfaces up/down and registered actions in moden_netif glue for
connection/disconnection events to set the netif up/down.
On update of any interface (set up/down) a routing preference is updated calling esp_netif_update_default_netif() that is called from
lwip context. But if the related netif was ppp type, the set_default api used user-mode, thus causing a dead lock.
Closes https://github.com/espressif/esp-idf/issues/4746
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
