net: ipv6: Incorporate IPv6 support into u-boot net subsystem

Add net_ip6_handler (an IPv6 packet handler) into net_loop. Add
neighbor discovery mechanism into network init process. That is the
main step to run IPv6 in u-boot. Now u-boot is capable to use NDP and
handle IPv6 packets.

Signed-off-by: Viacheslav Mitrofanov <v.v.mitrofanov@yadro.com>
Reviewed-by: Ramon Fried <rfried.dev@gmail.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

diff --git a/net/net.c b/net/net.c
index aca20e43b0b71c959543a35d1ae17d2882ec6073..63bf962b53a8508aab32247ea5dff4d67cc2b3b3 100644 (file)
--- a/net/net.c
+++ b/net/net.c
@@ -91,6 +91,8 @@
 #include <image.h>
 #include <log.h>
 #include <net.h>
+#include <net6.h>
+#include <ndisc.h>
 #include <net/fastboot.h>
 #include <net/tftp.h>
 #include <net/ncsi.h>
@@ -343,8 +345,17 @@ void net_auto_load(void)
 
 static int net_init_loop(void)
 {
-       if (eth_get_dev())
+       if (eth_get_dev()) {
                memcpy(net_ethaddr, eth_get_ethaddr(), 6);
+
+               if (IS_ENABLED(CONFIG_IPV6)) {
+                       ip6_make_lladdr(&net_link_local_ip6, net_ethaddr);
+                       if (!memcmp(&net_ip6, &net_null_addr_ip6,
+                                   sizeof(struct in6_addr)))
+                               memcpy(&net_ip6, &net_link_local_ip6,
+                                      sizeof(struct in6_addr));
+               }
+       }
        else
                /*
                 * Not ideal, but there's no way to get the actual error, and I
@@ -385,6 +396,7 @@ int net_init(void)
                                (i + 1) * PKTSIZE_ALIGN;
                }
                arp_init();
+               ndisc_init();
                net_clear_handlers();
 
                /* Only need to setup buffer pointers once. */
@@ -589,6 +601,11 @@ restart:
                if (arp_timeout_check() > 0)
                        time_start = get_timer(0);
 
+               if (IS_ENABLED(CONFIG_IPV6)) {
+                       if (use_ip6 && (ndisc_timeout_check() > 0))
+                               time_start = get_timer(0);
+               }
+
                /*
                 *      Check the ethernet for a new packet.  The ethernet
                 *      receive routine will process it.
@@ -1243,6 +1260,10 @@ void net_process_received_packet(uchar *in_packet, int len)
        case PROT_RARP:
                rarp_receive(ip, len);
                break;
+#endif
+#if IS_ENABLED(CONFIG_IPV6)
+       case PROT_IP6:
+               net_ip6_handler(et, (struct ip6_hdr *)ip, len);
 #endif
        case PROT_IP:
                debug_cond(DEBUG_NET_PKT, "Got IP\n");