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extmod/network_wiznet5k: Add support for IPv6.

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This adds support for the WIZNET5K nic to use IPv6 with the LWIP stack.
Additionally, if LWIP_IPV6 is disabled, the device is configured to drop
all IPv6 packets to reduce load on the MCU.

Signed-off-by: Jared Hancock <jared@greezybacon.me>
This commit is contained in:
Jared Hancock
2024-08-17 23:09:52 -05:00
committed by Damien George
parent b82c9ca706
commit e901ff8557
1 changed files with 14 additions and 1 deletions
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15
extmod/network_wiznet5k.c
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@@ -61,6 +61,7 @@
#include "lwip/err.h" #include "lwip/err.h"
#include "lwip/dns.h" #include "lwip/dns.h"
#include "lwip/dhcp.h" #include "lwip/dhcp.h"
#include "lwip/ethip6.h"
#include "netif/etharp.h" #include "netif/etharp.h"
#define TRACE_ETH_TX (0x0002) #define TRACE_ETH_TX (0x0002)
@@ -297,13 +298,21 @@ static err_t wiznet5k_netif_init(struct netif *netif) {
netif->hwaddr_len = sizeof(netif->hwaddr); netif->hwaddr_len = sizeof(netif->hwaddr);
int ret = WIZCHIP_EXPORT(socket)(0, Sn_MR_MACRAW, 0, 0); int ret = WIZCHIP_EXPORT(socket)(0, Sn_MR_MACRAW, 0, 0);
if (ret != 0) { if (ret != 0) {
printf("WIZNET fatal error in netifinit: %d\n", ret); printf("WIZNET fatal error in netif_init: %d\n", ret);
return ERR_IF; return ERR_IF;
} }
// Enable MAC filtering so we only get frames destined for us, to reduce load on lwIP // Enable MAC filtering so we only get frames destined for us, to reduce load on lwIP
setSn_MR(0, getSn_MR(0) | Sn_MR_MFEN); setSn_MR(0, getSn_MR(0) | Sn_MR_MFEN);
#if LWIP_IPV6
netif->output_ip6 = ethip6_output;
netif->flags |= NETIF_FLAG_MLD6;
#else
// Drop IPv6 packets if firmware does not support it
setSn_MR(0, getSn_MR(0) | Sn_MR_MIP6B);
#endif
return ERR_OK; return ERR_OK;
} }
@@ -847,6 +856,10 @@ static mp_obj_t wiznet5k_active(size_t n_args, const mp_obj_t *args) {
setSHAR(mac); setSHAR(mac);
} }
#if WIZNET5K_WITH_LWIP_STACK && LWIP_IPV6
netif_create_ip6_linklocal_address(&self->netif, 1);
#endif
// seems we need a small delay after init // seems we need a small delay after init
mp_hal_delay_ms(250); mp_hal_delay_ms(250);