This component provides simplified implementations of common socket-related utilities using lwIP and esp_netif. It is especially useful for porting Linux-based libraries to ESP32 where performance and memory constraints are secondary considerations.
| API | Description | Limitations |
|---|---|---|
ifaddrs() |
Retrieves interface addresses using esp_netif |
IPv4 addresses only |
socketpair() |
Creates a pair of connected sockets using lwIP loopback stream sockets |
IPv4 sockets only |
pipe() |
Wraps socketpair() to provide unidirectional pipe-like functionality |
Uses bidirectional sockets in place of true pipes |
getnameinfo() |
Converts IP addresses to human-readable form using lwIP's inet_ntop() |
IPv4 only; supports NI_NUMERICHOST and NI_NUMERICSERV flags only |
gai_strerror() |
Returns error code as a string | Simple numeric string representation only |
Note: socketpair() and pipe() are built on top of lwIP TCP sockets, inheriting the same characteristics. For instance, the maximum transmit buffer size is based on the TCP_SND_BUF setting.