zephyr: Enable IPv6 networking in addition to IPv4.

zephyr/main.c

@@ -67,11 +67,16 @@ static char *stack_top;
 static char heap[MICROPY_HEAP_SIZE];
 
 void init_zephyr(void) {
+    // TODO: Make addresses configurable
     #ifdef CONFIG_NET_IPV4
-    // TODO: Make address configurable
     static struct in_addr in4addr_my = {{{192, 0, 2, 1}}};
     net_if_ipv4_addr_add(net_if_get_default(), &in4addr_my, NET_ADDR_MANUAL, 0);
     #endif
+    #ifdef CONFIG_NET_IPV6
+    // 2001:db8::1
+    static struct in6_addr in6addr_my = {{{0x20, 0x01, 0x0d, 0xb8, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1}}};
+    net_if_ipv6_addr_add(net_if_get_default(), &in6addr_my, NET_ADDR_MANUAL, 0);
+    #endif
 }
 
 int real_main(void) {

zephyr/prj_base.conf

@@ -8,5 +8,6 @@ CONFIG_MAIN_STACK_SIZE=4096
 # Networking config
 CONFIG_NETWORKING=y
 CONFIG_NET_IPV4=y
+CONFIG_NET_IPV6=y
 CONFIG_TEST_RANDOM_GENERATOR=y
-CONFIG_NET_NBUF_RX_COUNT=4
+CONFIG_NET_NBUF_RX_COUNT=5