l2_packet: Add support for NDISC packet filter in l2_packet_linux

Signed-off-by: Kyeyoon Park <kyeyoonp@qca.qualcomm.com>

diff --git a/src/l2_packet/l2_packet.h b/src/l2_packet/l2_packet.h
index f391f3682aa00af314747346cb01941ec636eb8d..7537f93eebbe5b36524ee0988b889db75a030704 100644 (file)
--- a/src/l2_packet/l2_packet.h
+++ b/src/l2_packet/l2_packet.h
@@ -41,6 +41,7 @@ struct l2_ethhdr {
 
 enum l2_packet_filter_type {
        L2_PACKET_FILTER_DHCP,
+       L2_PACKET_FILTER_NDISC,
 };
 
 /**

diff --git a/src/l2_packet/l2_packet_linux.c b/src/l2_packet/l2_packet_linux.c
index fcbf7e040fe92f936c9e566f6908fbcb19b3d90c..7217f8610b4fe74b5d1693ae144e571f3d8c7b61 100644 (file)
--- a/src/l2_packet/l2_packet_linux.c
+++ b/src/l2_packet/l2_packet_linux.c
@@ -56,6 +56,24 @@ static const struct sock_fprog dhcp_sock_filter = {
 };
 
 
+/* Generated by 'sudo tcpdump -dd -s 150 multicast and ip6[6]=58' */
+static struct sock_filter ndisc_sock_filter_insns[] = {
+       { 0x30, 0, 0, 0x00000000 },
+       { 0x45, 0, 5, 0x00000001 },
+       { 0x28, 0, 0, 0x0000000c },
+       { 0x15, 0, 3, 0x000086dd },
+       { 0x30, 0, 0, 0x00000014 },
+       { 0x15, 0, 1, 0x0000003a },
+       { 0x6, 0, 0, 0x00000096 },
+       { 0x6, 0, 0, 0x00000000 },
+};
+
+static const struct sock_fprog ndisc_sock_filter = {
+       .len = ARRAY_SIZE(ndisc_sock_filter_insns),
+       .filter = ndisc_sock_filter_insns,
+};
+
+
 int l2_packet_get_own_addr(struct l2_packet_data *l2, u8 *addr)
 {
        os_memcpy(addr, l2->own_addr, ETH_ALEN);
@@ -240,6 +258,9 @@ int l2_packet_set_packet_filter(struct l2_packet_data *l2,
        case L2_PACKET_FILTER_DHCP:
                sock_filter = &dhcp_sock_filter;
                break;
+       case L2_PACKET_FILTER_NDISC:
+               sock_filter = &ndisc_sock_filter;
+               break;
        default:
                return -1;
        }