mirror of https://github.com/espressif/esp-idf.git synced 2024-10-05 20:47:46 -04:00

History

Jakob Hasse 40d80b981a Fixed unity fixture for ESP32/S2 * Created compile switch for UNITY_MAIN since it was using exit() syscall leading to abort() on ESP		2020-09-04 17:37:47 +08:00
..
include	esp_wifi: optimize WiFi TX performance	2020-08-13 12:26:21 +08:00
loopback	lwip: Enable IPv6 stateless address autoconfiguration	2020-01-14 07:15:26 +00:00
lwip	esp-netif: Fix SLIP interface to start with correct IPv6 addr	2020-09-03 18:11:09 +00:00
private_include	esp_netif: added locking for netif list management, unit tests to use unique if_keys, updated comments	2019-11-13 12:36:25 +01:00
test	esp_netif tests: Add manual DHCP state transision tests	2020-07-29 11:50:27 +00:00
test_app	Fixed unity fixture for ESP32/S2	2020-09-04 17:37:47 +08:00
CMakeLists.txt	esp-netif: SLIP interface refactor to isolate interface from drivers	2020-07-15 15:46:46 +02:00
component.mk	esp_netif: include tcpip_adapter legacy header by default to provide implicit compatiblity	2019-11-13 12:36:25 +01:00
esp_netif_defaults.c	esp-netif: Added esp_netif slip support, slip_modem component and example	2020-07-15 15:46:46 +02:00
esp_netif_handlers.c	esp_netif: fix default connect handler to check dhcpc return value	2020-05-06 07:26:50 +02:00
esp_netif_objects.c	esp-netif: SLIP interface refactor to isolate interface from drivers	2020-07-15 15:46:46 +02:00
Kconfig	esp_netif: update default DHCP IP addresses to be in line with old interface, added loopback implementation, explicit esp-netif init, sanity checks for parameters added	2019-11-13 12:36:25 +01:00
README.md	esp_netif: added locking for netif list management, unit tests to use unique if_keys, updated comments	2019-11-13 12:36:25 +01:00

README.md

ESP-NETIF architecture

                 |          (A) USER CODE                 |
                 |                                        |
    .............| init          settings      events     |
    .            +----------------------------------------+          
    .               .                |           *
    .               .                V           *                                   
--------+        +===========================+   *     +-----------------------+
        |        | new/config     get/set    |   *     |                       |
        |        |                           |...*.....| init                  |
        |        |---------------------------|   *     |                       |
  init  |        |                           |****     |                       |
  start |********|  event handler            |*********|  DHCP                 |
  stop  |        |                           |         |                       |
        |        |---------------------------|         |                       | 
        |        |                           |         |    NETIF              |
  +-----|        |                           |         +-----------------+     |   
  | glue|----<---|  esp_netif_transmit       |--<------| netif_output    |     |
  |     |        |                           |         |                 |     |
  |     |---->---|  esp_netif_receive        |-->------| netif_input     |     |
  |     |        |                           |         + ----------------+     |
  |     |....<...|  esp_netif_free_rx_buffer |...<.....| packet buffer         |
  +-----|        |                           |         |                       |  
        |        |                           |         |                       |  
  (B)   |        |                           |         +-----------------------+
--------+        +===========================+
communication                                                NETWORK STACK
DRIVER                   ESP-NETIF

Components:

A) User code, boiler plate

Overall application interaction with communication media and network stack

initialization code
- create a new instance of ESP-NETIF
- configure the object with
  1. netif specific options (flags, behaviour, name)
  2. network stack options (netif init and input functions, not publicly available)
  3. IO driver specific options (transmit, tx_free functions, IO driver handle)
- setup event handlers
- use default handlers for common interfaces defined in IO drivers; or define a specific handlers for customised behaviour/new interfaces
- register handlers for app related events (such as IP lost/acquired)

interact with network interfaces using ESP-NETIF API

B) Communication driver, IO driver, media driver

event handler
- define behaviour patterns of interaction with ESP-NETIF (example: ehternet link-up -> turn netif on)
glue IO layer: adapt the input/output functions to use esp-netif transmit/input/free_rx
- install driver_transmit to appropriate ESP-NETIF object, so that outgoing packets from network stack are passed to the IO driver
- calls esp_netif_receive to pass incoming data to network stack

C) ESP-NETIF, former tcpip_adapter

init API (new, configure)
IO API: for passing data between IO driver and network stack
event/action API (esp-netif lifecycle management)
- building blocks for designing event handlers
setters, getters
network stack abstraction: enabling user interaction with TCP/IP stack
- netif up/down
- DHCP server, client
- DNS API
driver conversion utilities

D) Network stack: no public interaction with user code (wrtt interfaces)

Data/event flow:

........ Initialization line from user code to esp-netif and comm driver
--<--->-- Data packets going from communication media to TCP/IP stack and back
******** Events agregated in ESP-NETIP propagates to driver, user code and network stack
| User settings and runtime configuration