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lwIP on ethernet: examples (#8395)

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* ethernet: examples

* remove duplicate

* styling

* fix comment restyle + comment eth.setdefault()

* comment and add comments about eth.setDefault()

* update comments when using interface::setDefault()

* repair bad merge

* fix default interface case

* factorize

* change comment
This commit is contained in:
david gauchard
2022-06-02 14:03:38 +02:00
committed by GitHub
parent f5ef02d643
commit 5f2af1945b
13 changed files with 947 additions and 112 deletions
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58
cores/esp8266/LwipIntfDev.h
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@ -59,7 +59,17 @@ public:
return IPAddress(ip4_addr_get_u32(ip_2_ip4(&_netif.gw)));
}
void setDefault();
// 1. Currently when no default is set, esp8266-Arduino uses the first
// DHCP client interface receiving a valid address and gateway to
// become the new lwIP default interface.
// 2. Otherwise - when using static addresses - lwIP for every packets by
// defaults selects automatically the best suited output interface
// matching the destination address. If several interfaces match,
// the first one is picked. On esp8266/Arduno: WiFi interfaces are
// checked first.
// 3. Or, use `::setDefault(true)` to force using this interface's gateway
// as default router.
void setDefault(bool deflt = true);
// true if interface has a valid IPv4 address
bool connected()
@ -67,12 +77,18 @@ public:
return !!ip4_addr_get_u32(ip_2_ip4(&_netif.ip_addr));
}
bool routable()
{
return !ip_addr_isany(&_netif.gw);
}
// ESP8266WiFi API compatibility
wl_status_t status();
protected:
err_t netif_init();
void check_route();
void netif_status_callback();
static err_t netif_init_s(netif* netif);
@ -184,10 +200,10 @@ boolean LwipIntfDev<RawDev>::begin(const uint8_t* macAddress, const uint16_t mtu
return false;
}
_netif.flags |= NETIF_FLAG_UP;
if (localIP().v4() == 0)
{
// IP not set, starting DHCP
_netif.flags |= NETIF_FLAG_UP;
switch (dhcp_start(&_netif))
{
case ERR_OK:
@ -201,6 +217,12 @@ boolean LwipIntfDev<RawDev>::begin(const uint8_t* macAddress, const uint16_t mtu
return false;
}
}
else
{
// IP is set, static config
netif_set_link_up(&_netif);
netif_set_up(&_netif);
}
_started = true;
@ -301,17 +323,26 @@ err_t LwipIntfDev<RawDev>::netif_init()
template<class RawDev>
void LwipIntfDev<RawDev>::netif_status_callback()
{
check_route();
if (connected())
{
if (_default || (netif_default == nullptr && !ip_addr_isany(&_netif.gw)))
{
// on user request,
// or if there is no current default interface, but a gateway is valid
netif_set_default(&_netif);
}
sntp_stop();
sntp_init();
}
}
template<class RawDev>
void LwipIntfDev<RawDev>::check_route()
{
if (connected())
{
if (_default || (netif_default == nullptr && routable()))
{
// on user request,
// or if there is no current default interface, but our gateway is valid
netif_set_default(&_netif);
}
}
else if (netif_default == &_netif)
{
netif_set_default(nullptr);
@ -386,13 +417,10 @@ err_t LwipIntfDev<RawDev>::handlePackets()
}
template<class RawDev>
void LwipIntfDev<RawDev>::setDefault()
void LwipIntfDev<RawDev>::setDefault(bool deflt)
{
_default = true;
if (connected())
{
netif_set_default(&_netif);
}
_default = deflt;
check_route();
}
#endif // _LWIPINTFDEV_H