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authorMatthew G Smith <mgsmith@netgate.com>2019-09-04 15:01:04 -0500
committerDamjan Marion <dmarion@me.com>2019-10-02 12:12:21 +0000
commitd459bf344e20ffb38a869c9fef2211f55d766b02 (patch)
tree18dca2c1534c5b871b180453763a2e2e7b5ef56a /src/vnet
parentdd4d8ac29202fe54e74a13ce86d1ba3f79d1555f (diff)
ethernet: dmac filter checks secondary mac addrs
Maintain a list of secondary MAC addresses on ethernet_interface_t. In ethernet-input dmac filtering, If packets do not match the primary interface hardware address, check to see if they match the other addresses. Type: feature Change-Id: Ie0edf45cae0d85c038a61086c47b3ae82d7e162d Signed-off-by: Matthew Smith <mgsmith@netgate.com>
Diffstat (limited to 'src/vnet')
-rw-r--r--src/vnet/ethernet/ethernet.h7
-rw-r--r--src/vnet/ethernet/interface.c47
-rwxr-xr-xsrc/vnet/ethernet/node.c166
3 files changed, 186 insertions, 34 deletions
diff --git a/src/vnet/ethernet/ethernet.h b/src/vnet/ethernet/ethernet.h
index 344705b0cc3..821a576ddf5 100644
--- a/src/vnet/ethernet/ethernet.h
+++ b/src/vnet/ethernet/ethernet.h
@@ -154,6 +154,9 @@ typedef struct ethernet_interface
/* Ethernet (MAC) address for this interface. */
u8 address[6];
+
+ /* Secondary MAC addresses for this interface */
+ mac_address_t *secondary_addrs;
} ethernet_interface_t;
extern vnet_hw_interface_class_t ethernet_hw_interface_class;
@@ -310,6 +313,10 @@ ethernet_get_type_info (ethernet_main_t * em, ethernet_type_t type)
ethernet_interface_t *ethernet_get_interface (ethernet_main_t * em,
u32 hw_if_index);
+mac_address_t *ethernet_interface_add_del_address (ethernet_main_t * em,
+ u32 hw_if_index,
+ const u8 * address,
+ u8 is_add);
clib_error_t *ethernet_register_interface (vnet_main_t * vnm,
u32 dev_class_index,
diff --git a/src/vnet/ethernet/interface.c b/src/vnet/ethernet/interface.c
index 0f54aa1e393..a0fa61c25f4 100644
--- a/src/vnet/ethernet/interface.c
+++ b/src/vnet/ethernet/interface.c
@@ -892,6 +892,53 @@ ethernet_get_interface (ethernet_main_t * em, u32 hw_if_index)
index ? pool_elt_at_index (em->interfaces, i->hw_instance) : 0);
}
+mac_address_t *
+ethernet_interface_add_del_address (ethernet_main_t * em,
+ u32 hw_if_index, const u8 * address,
+ u8 is_add)
+{
+ ethernet_interface_t *ei = ethernet_get_interface (em, hw_if_index);
+ mac_address_t *if_addr = 0;
+
+ /* return if there is not an ethernet interface for this hw interface */
+ if (!ei)
+ return 0;
+
+ /* determine whether the address is configured on the interface */
+ vec_foreach (if_addr, ei->secondary_addrs)
+ {
+ if (!ethernet_mac_address_equal (if_addr->bytes, address))
+ continue;
+
+ break;
+ }
+
+ if (if_addr && vec_is_member (ei->secondary_addrs, if_addr))
+ {
+ /* delete found address */
+ if (!is_add)
+ {
+ vec_delete (ei->secondary_addrs, 1, if_addr - ei->secondary_addrs);
+ if_addr = 0;
+ }
+ /* address already found, so nothing needs to be done if adding */
+ }
+ else
+ {
+ /* if_addr could be 0 or past the end of the vector. reset to 0 */
+ if_addr = 0;
+
+ /* add new address */
+ if (is_add)
+ {
+ vec_add2 (ei->secondary_addrs, if_addr, 1);
+ clib_memcpy (&if_addr->bytes, address, sizeof (if_addr->bytes));
+ }
+ }
+
+ return if_addr;
+}
+
int
vnet_delete_loopback_interface (u32 sw_if_index)
{
diff --git a/src/vnet/ethernet/node.c b/src/vnet/ethernet/node.c
index 63ce0ce1c6c..488218e1a87 100755
--- a/src/vnet/ethernet/node.c
+++ b/src/vnet/ethernet/node.c
@@ -608,34 +608,80 @@ eth_input_tag_lookup (vlib_main_t * vm, vnet_main_t * vnm,
l->n_bytes += vlib_buffer_length_in_chain (vm, b);
}
+#define DMAC_MASK clib_net_to_host_u64 (0xFFFFFFFFFFFF0000)
+#define DMAC_IGBIT clib_net_to_host_u64 (0x0100000000000000)
+
+#ifdef CLIB_HAVE_VEC256
+static_always_inline u32
+is_dmac_bad_x4 (u64 * dmacs, u64 hwaddr)
+{
+ u64x4 r0 = u64x4_load_unaligned (dmacs) & u64x4_splat (DMAC_MASK);
+ r0 = (r0 != u64x4_splat (hwaddr)) & ((r0 & u64x4_splat (DMAC_IGBIT)) == 0);
+ return u8x32_msb_mask ((u8x32) (r0));
+}
+#else
+static_always_inline u8
+is_dmac_bad (u64 dmac, u64 hwaddr)
+{
+ u64 r0 = dmac & DMAC_MASK;
+ return (r0 != hwaddr) && ((r0 & DMAC_IGBIT) == 0);
+}
+#endif
+
+static_always_inline u8
+is_sec_dmac_bad (u64 dmac, u64 hwaddr)
+{
+ return ((dmac & DMAC_MASK) != hwaddr);
+}
+
+#ifdef CLIB_HAVE_VEC256
+static_always_inline u32
+is_sec_dmac_bad_x4 (u64 * dmacs, u64 hwaddr)
+{
+ u64x4 r0 = u64x4_load_unaligned (dmacs) & u64x4_splat (DMAC_MASK);
+ r0 = (r0 != u64x4_splat (hwaddr));
+ return u8x32_msb_mask ((u8x32) (r0));
+}
+#endif
+
+static_always_inline u8
+eth_input_sec_dmac_check_x1 (u64 hwaddr, u64 * dmac, u8 * dmac_bad)
+{
+ dmac_bad[0] &= is_sec_dmac_bad (dmac[0], hwaddr);
+ return dmac_bad[0];
+}
+
+static_always_inline u32
+eth_input_sec_dmac_check_x4 (u64 hwaddr, u64 * dmac, u8 * dmac_bad)
+{
+#ifdef CLIB_HAVE_VEC256
+ *(u32 *) (dmac_bad + 0) &= is_sec_dmac_bad_x4 (dmac + 0, hwaddr);
+#else
+ dmac_bad[0] &= is_sec_dmac_bad (dmac[0], hwaddr);
+ dmac_bad[1] &= is_sec_dmac_bad (dmac[1], hwaddr);
+ dmac_bad[2] &= is_sec_dmac_bad (dmac[2], hwaddr);
+ dmac_bad[3] &= is_sec_dmac_bad (dmac[3], hwaddr);
+#endif
+ return *(u32 *) dmac_bad;
+}
+
static_always_inline void
eth_input_process_frame_dmac_check (vnet_hw_interface_t * hi,
u64 * dmacs, u8 * dmacs_bad,
- u32 n_packets)
+ u32 n_packets, ethernet_interface_t * ei,
+ u8 have_sec_dmac)
{
- u64 mask = clib_net_to_host_u64 (0xFFFFFFFFFFFF0000);
- u64 igbit = clib_net_to_host_u64 (0x0100000000000000);
- u64 hwaddr = (*(u64 *) hi->hw_address) & mask;
+ u64 hwaddr = (*(u64 *) hi->hw_address) & DMAC_MASK;
u64 *dmac = dmacs;
u8 *dmac_bad = dmacs_bad;
-
+ u32 bad = 0;
i32 n_left = n_packets;
#ifdef CLIB_HAVE_VEC256
- u64x4 igbit4 = u64x4_splat (igbit);
- u64x4 mask4 = u64x4_splat (mask);
- u64x4 hwaddr4 = u64x4_splat (hwaddr);
while (n_left > 0)
{
- u64x4 r0, r1;
- r0 = u64x4_load_unaligned (dmac + 0) & mask4;
- r1 = u64x4_load_unaligned (dmac + 4) & mask4;
-
- r0 = (r0 != hwaddr4) & ((r0 & igbit4) == 0);
- r1 = (r1 != hwaddr4) & ((r1 & igbit4) == 0);
-
- *(u32 *) (dmac_bad + 0) = u8x32_msb_mask ((u8x32) (r0));
- *(u32 *) (dmac_bad + 4) = u8x32_msb_mask ((u8x32) (r1));
+ bad |= *(u32 *) (dmac_bad + 0) = is_dmac_bad_x4 (dmac + 0, hwaddr);
+ bad |= *(u32 *) (dmac_bad + 4) = is_dmac_bad_x4 (dmac + 4, hwaddr);
/* next */
dmac += 8;
@@ -645,22 +691,10 @@ eth_input_process_frame_dmac_check (vnet_hw_interface_t * hi,
#else
while (n_left > 0)
{
- u64 r0, r1, r2, r3;
-
- r0 = dmac[0] & mask;
- r1 = dmac[1] & mask;
- r2 = dmac[2] & mask;
- r3 = dmac[3] & mask;
-
- r0 = (r0 != hwaddr) && ((r0 & igbit) == 0);
- r1 = (r1 != hwaddr) && ((r1 & igbit) == 0);
- r2 = (r2 != hwaddr) && ((r2 & igbit) == 0);
- r3 = (r3 != hwaddr) && ((r3 & igbit) == 0);
-
- dmac_bad[0] = r0;
- dmac_bad[1] = r1;
- dmac_bad[2] = r2;
- dmac_bad[3] = r3;
+ bad |= dmac_bad[0] = is_dmac_bad (dmac[0], hwaddr);
+ bad |= dmac_bad[1] = is_dmac_bad (dmac[1], hwaddr);
+ bad |= dmac_bad[2] = is_dmac_bad (dmac[2], hwaddr);
+ bad |= dmac_bad[3] = is_dmac_bad (dmac[3], hwaddr);
/* next */
dmac += 4;
@@ -668,6 +702,62 @@ eth_input_process_frame_dmac_check (vnet_hw_interface_t * hi,
n_left -= 4;
}
#endif
+
+ if (have_sec_dmac && bad)
+ {
+ mac_address_t *addr;
+
+ vec_foreach (addr, ei->secondary_addrs)
+ {
+ u64 hwaddr = ((u64 *) addr)[0] & DMAC_MASK;
+ i32 n_left = n_packets;
+ u64 *dmac = dmacs;
+ u8 *dmac_bad = dmacs_bad;
+
+ bad = 0;
+
+ while (n_left > 0)
+ {
+ int adv = 0;
+ int n_bad;
+
+ /* skip any that have already matched */
+ if (!dmac_bad[0])
+ {
+ dmac += 1;
+ dmac_bad += 1;
+ n_left -= 1;
+ continue;
+ }
+
+ n_bad = clib_min (4, n_left);
+
+ /* If >= 4 left, compare 4 together */
+ if (n_bad == 4)
+ {
+ bad |= eth_input_sec_dmac_check_x4 (hwaddr, dmac, dmac_bad);
+ adv = 4;
+ n_bad = 0;
+ }
+
+ /* handle individually */
+ while (n_bad > 0)
+ {
+ bad |= eth_input_sec_dmac_check_x1 (hwaddr, dmac + adv,
+ dmac_bad + adv);
+ adv += 1;
+ n_bad -= 1;
+ }
+
+ dmac += adv;
+ dmac_bad += adv;
+ n_left -= adv;
+ }
+
+ if (!bad) /* can stop looping if everything matched */
+ break;
+ }
+ }
}
/* process frame of buffers, store ethertype into array and update
@@ -701,6 +791,7 @@ eth_input_process_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
i32 n_left = n_packets;
vlib_buffer_t *b[20];
u32 *from;
+ ethernet_interface_t *ei = ethernet_get_interface (em, hi->hw_if_index);
from = buffer_indices;
@@ -767,7 +858,14 @@ eth_input_process_frame (vlib_main_t * vm, vlib_node_runtime_t * node,
}
if (dmac_check)
- eth_input_process_frame_dmac_check (hi, dmacs, dmacs_bad, n_packets);
+ {
+ if (vec_len (ei->secondary_addrs))
+ eth_input_process_frame_dmac_check (hi, dmacs, dmacs_bad, n_packets,
+ ei, 1 /* have_sec_dmac */ );
+ else
+ eth_input_process_frame_dmac_check (hi, dmacs, dmacs_bad, n_packets,
+ ei, 0 /* have_sec_dmac */ );
+ }
next_ip4 = em->l3_next.input_next_ip4;
next_ip6 = em->l3_next.input_next_ip6;