1 files changed, 240 insertions, 16 deletions

diff --git a/src/plugins/acl/acl.c b/src/plugins/acl/acl.c
index 1f1517c333d..82e1ab04e84 100644
--- a/src/plugins/acl/acl.c
+++ b/src/plugins/acl/acl.c
@@ -1191,6 +1191,7 @@ acl_interface_add_del_inout_acl (u32 sw_if_index, u8 is_add, u8 is_input,
 typedef struct
 {
   u8 is_ipv6;
+  u8 has_egress;
   u8 mac_mask[6];
   u8 prefix_len;
   u32 count;
@@ -1198,6 +1199,11 @@ typedef struct
   u32 arp_table_index;
   u32 dot1q_table_index;
   u32 dot1ad_table_index;
+  /* egress tables */
+  u32 out_table_index;
+  u32 out_arp_table_index;
+  u32 out_dot1q_table_index;
+  u32 out_dot1ad_table_index;
 } macip_match_type_t;
 
 static u32
@@ -1263,6 +1269,29 @@ get_l3_src_offset (int is6)
 }
 
 static int
+get_l3_dst_offset (int is6)
+{
+  if (is6)
+    return (sizeof (ethernet_header_t) +
+	    offsetof (ip6_header_t, dst_address));
+  else
+    return (sizeof (ethernet_header_t) +
+	    offsetof (ip4_header_t, dst_address));
+}
+
+/*
+ * return if the is_permit value also requires to create the egress tables
+ * For backwards compatibility, we keep the is_permit = 1 to only
+ * create the ingress tables, and the new value of 3 will also
+ * create the egress tables based on destination.
+ */
+static int
+macip_permit_also_egress (u8 is_permit)
+{
+  return (is_permit == 3);
+}
+
+static int
 macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
 {
   macip_match_type_t *mvec = NULL;
@@ -1271,6 +1300,7 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
   int i;
   u32 match_type_index;
   u32 last_table;
+  u32 out_last_table;
   u8 mask[5 * 16];
   vnet_classify_main_t *cm = &vnet_classify_main;
 
@@ -1289,30 +1319,67 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
 		  a->rules[i].src_mac_mask, 6);
 	  mvec[match_type_index].prefix_len = a->rules[i].src_prefixlen;
 	  mvec[match_type_index].is_ipv6 = a->rules[i].is_ipv6;
+	  mvec[match_type_index].has_egress = 0;
 	  mvec[match_type_index].table_index = ~0;
+	  mvec[match_type_index].arp_table_index = ~0;
 	  mvec[match_type_index].dot1q_table_index = ~0;
 	  mvec[match_type_index].dot1ad_table_index = ~0;
+	  mvec[match_type_index].out_table_index = ~0;
+	  mvec[match_type_index].out_arp_table_index = ~0;
+	  mvec[match_type_index].out_dot1q_table_index = ~0;
+	  mvec[match_type_index].out_dot1ad_table_index = ~0;
 	}
       mvec[match_type_index].count++;
+      mvec[match_type_index].has_egress |=
+	macip_permit_also_egress (a->rules[i].is_permit);
     }
   /* Put the most frequently used tables last in the list so we can create classifier tables in reverse order */
   vec_sort_with_function (mvec, match_type_compare);
   /* Create the classifier tables */
   last_table = ~0;
+  out_last_table = ~0;
   /* First add ARP tables */
   vec_foreach (mt, mvec)
   {
     int mask_len;
     int is6 = mt->is_ipv6;
 
-    mt->arp_table_index = ~0;
     if (!is6)
       {
+	/*
+	   0                   1                   2                   3
+	   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |                      Destination Address                      |
+	   +                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |                               |                               |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               +
+	   |                         Source Address                        |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |           EtherType           |         Hardware Type         |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |         Protocol Type         |  Hw addr len  | Proto addr len|
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |             Opcode            |                               |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+                               +
+	   |                    Sender Hardware Address                    |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |                    Sender Protocol Address                    |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |                    Target Hardware Address                    |
+	   +                               +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |                               |     TargetProtocolAddress     |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	   |                               |
+	   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+	 */
 	memset (mask, 0, sizeof (mask));
+	/* source MAC address */
 	memcpy (&mask[6], mt->mac_mask, 6);
 	memset (&mask[12], 0xff, 2);	/* ethernet protocol */
+	/* sender hardware address within ARP */
 	memcpy (&mask[14 + 8], mt->mac_mask, 6);
-
+	/* sender protocol address within ARP */
 	for (i = 0; i < (mt->prefix_len / 8); i++)
 	  mask[14 + 14 + i] = 0xff;
 	if (mt->prefix_len % 8)
@@ -1325,6 +1392,23 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
 					  (~0 == last_table) ? 0 : ~0,
 					  &mt->arp_table_index, 1);
 	last_table = mt->arp_table_index;
+	if (mt->has_egress)
+	  {
+	    /* egress ARP table */
+	    memset (mask, 0, sizeof (mask));
+	    // memcpy (&mask[0], mt->mac_mask, 6);
+	    memset (&mask[12], 0xff, 2);	/* ethernet protocol */
+	    /* AYXX: FIXME here - can we tighten the ARP-related table more ? */
+	    /* mask captures just the destination and the ethertype */
+	    mask_len = ((14 +
+			 (sizeof (u32x4) -
+			  1)) / sizeof (u32x4)) * sizeof (u32x4);
+	    acl_classify_add_del_table_small (cm, mask, mask_len,
+					      out_last_table,
+					      (~0 == out_last_table) ? 0 : ~0,
+					      &mt->out_arp_table_index, 1);
+	    out_last_table = mt->out_arp_table_index;
+	  }
       }
   }
   /* Now add IP[46] tables */
@@ -1332,18 +1416,20 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
   {
     int mask_len;
     int is6 = mt->is_ipv6;
-    int l3_src_offs = get_l3_src_offset (is6);
+    int l3_src_offs;
+    int l3_dst_offs;
     int tags;
     u32 *last_tag_table;
+    u32 *out_last_tag_table;
 
     /*
      * create chained tables for VLAN (no-tags, dot1q and dot1ad) packets
      */
-    l3_src_offs += 8;
     for (tags = 2; tags >= 0; tags--)
       {
 	memset (mask, 0, sizeof (mask));
 	memcpy (&mask[6], mt->mac_mask, 6);
+	l3_src_offs = tags * 4 + get_l3_src_offset (is6);
 	switch (tags)
 	  {
 	  case 0:
@@ -1382,22 +1468,74 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
 					  (~0 == last_table) ? 0 : ~0,
 					  last_tag_table, 1);
 	last_table = *last_tag_table;
-
-	memset (&mask[12], 0, sizeof (mask) - 12);
-	l3_src_offs -= 4;
+      }
+    if (mt->has_egress)
+      {
+	for (tags = 2; tags >= 0; tags--)
+	  {
+	    memset (mask, 0, sizeof (mask));
+	    /* MAC destination */
+	    memcpy (&mask[0], mt->mac_mask, 6);
+	    l3_dst_offs = tags * 4 + get_l3_dst_offset (is6);
+	    switch (tags)
+	      {
+	      case 0:
+	      default:
+		memset (&mask[12], 0xff, 2);	/* ethernet protocol */
+		out_last_tag_table = &mt->out_table_index;
+		break;
+	      case 1:
+		memset (&mask[12], 0xff, 2);	/* VLAN tag1 */
+		memset (&mask[16], 0xff, 2);	/* ethernet protocol */
+		out_last_tag_table = &mt->out_dot1q_table_index;
+		break;
+	      case 2:
+		memset (&mask[12], 0xff, 2);	/* VLAN tag1 */
+		memset (&mask[16], 0xff, 2);	/* VLAN tag2 */
+		memset (&mask[20], 0xff, 2);	/* ethernet protocol */
+		out_last_tag_table = &mt->out_dot1ad_table_index;
+		break;
+	      }
+	    for (i = 0; i < (mt->prefix_len / 8); i++)
+	      {
+		mask[l3_dst_offs + i] = 0xff;
+	      }
+	    if (mt->prefix_len % 8)
+	      {
+		mask[l3_dst_offs + (mt->prefix_len / 8)] =
+		  0xff - ((1 << (8 - mt->prefix_len % 8)) - 1);
+	      }
+	    /*
+	     * Round-up the number of bytes needed to store the prefix,
+	     * and round up the number of vectors too
+	     */
+	    mask_len = ((l3_dst_offs + ((mt->prefix_len + 7) / 8) +
+			 (sizeof (u32x4) -
+			  1)) / sizeof (u32x4)) * sizeof (u32x4);
+	    acl_classify_add_del_table_small (cm, mask, mask_len,
+					      out_last_table,
+					      (~0 == out_last_table) ? 0 : ~0,
+					      out_last_tag_table, 1);
+	    out_last_table = *out_last_tag_table;
+	  }
       }
   }
   a->ip4_table_index = last_table;
   a->ip6_table_index = last_table;
   a->l2_table_index = last_table;
 
+  a->out_ip4_table_index = out_last_table;
+  a->out_ip6_table_index = out_last_table;
+  a->out_l2_table_index = out_last_table;
+
   /* Populate the classifier tables with rules from the MACIP ACL */
   for (i = 0; i < a->count; i++)
     {
       u32 action = 0;
       u32 metadata = 0;
       int is6 = a->rules[i].is_ipv6;
-      int l3_src_offs = get_l3_src_offset (is6);
+      int l3_src_offs;
+      int l3_dst_offs;
       u32 tag_table;
       int tags, eth;
 
@@ -1407,10 +1545,10 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
 			       a->rules[i].is_ipv6);
       ASSERT (match_type_index != ~0);
 
-      l3_src_offs += 8;
       for (tags = 2; tags >= 0; tags--)
 	{
 	  memset (mask, 0, sizeof (mask));
+	  l3_src_offs = tags * 4 + get_l3_src_offset (is6);
 	  memcpy (&mask[6], a->rules[i].src_mac, 6);
 	  switch (tags)
 	    {
@@ -1452,7 +1590,6 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
 					 mask, a->rules[i].is_permit ? ~0 : 0,
 					 i, 0, action, metadata, 1);
 	  memset (&mask[12], 0, sizeof (mask) - 12);
-	  l3_src_offs -= 4;
 	}
 
       /* add ARP table entry too */
@@ -1470,6 +1607,75 @@ macip_create_classify_tables (acl_main_t * am, u32 macip_acl_index)
 					 mask, a->rules[i].is_permit ? ~0 : 0,
 					 i, 0, action, metadata, 1);
 	}
+      if (macip_permit_also_egress (a->rules[i].is_permit))
+	{
+	  /* Add the egress entry with destination set */
+	  for (tags = 2; tags >= 0; tags--)
+	    {
+	      memset (mask, 0, sizeof (mask));
+	      l3_dst_offs = tags * 4 + get_l3_dst_offset (is6);
+	      /* src mac in the other direction becomes dst */
+	      memcpy (&mask[0], a->rules[i].src_mac, 6);
+	      switch (tags)
+		{
+		case 0:
+		default:
+		  tag_table = mvec[match_type_index].out_table_index;
+		  eth = 12;
+		  break;
+		case 1:
+		  tag_table = mvec[match_type_index].out_dot1q_table_index;
+		  mask[12] = 0x81;
+		  mask[13] = 0x00;
+		  eth = 16;
+		  break;
+		case 2:
+		  tag_table = mvec[match_type_index].out_dot1ad_table_index;
+		  mask[12] = 0x88;
+		  mask[13] = 0xa8;
+		  mask[16] = 0x81;
+		  mask[17] = 0x00;
+		  eth = 20;
+		  break;
+		}
+	      if (is6)
+		{
+		  memcpy (&mask[l3_dst_offs], &a->rules[i].src_ip_addr.ip6,
+			  16);
+		  mask[eth] = 0x86;
+		  mask[eth + 1] = 0xdd;
+		}
+	      else
+		{
+		  memcpy (&mask[l3_dst_offs], &a->rules[i].src_ip_addr.ip4,
+			  4);
+		  mask[eth] = 0x08;
+		  mask[eth + 1] = 0x00;
+		}
+
+	      /* add session to table mvec[match_type_index].table_index; */
+	      vnet_classify_add_del_session (cm, tag_table,
+					     mask,
+					     a->rules[i].is_permit ? ~0 : 0,
+					     i, 0, action, metadata, 1);
+	      // memset (&mask[12], 0, sizeof (mask) - 12);
+	    }
+
+	  /* add ARP table entry too */
+	  if (!is6 && (mvec[match_type_index].out_arp_table_index != ~0))
+	    {
+	      memset (mask, 0, sizeof (mask));
+	      memcpy (&mask[0], a->rules[i].src_mac, 6);
+	      mask[12] = 0x08;
+	      mask[13] = 0x06;
+	      vnet_classify_add_del_session (cm,
+					     mvec
+					     [match_type_index].out_arp_table_index,
+					     mask,
+					     a->rules[i].is_permit ? ~0 : 0,
+					     i, 0, action, metadata, 1);
+	    }
+	}
     }
   return 0;
 }
@@ -1517,6 +1723,12 @@ macip_maybe_apply_unapply_classifier_tables (acl_main_t * am, u32 acl_index,
 					is_apply);
 	/* return the first unhappy outcome but make try to plough through. */
 	rv = rv || rv0;
+	rv0 =
+	  vnet_set_output_acl_intfc (am->vlib_main, i, a->out_ip4_table_index,
+				     a->out_ip6_table_index,
+				     a->out_l2_table_index, is_apply);
+	/* return the first unhappy outcome but make try to plough through. */
+	rv = rv || rv0;
       }
   return rv;
 }
@@ -1625,6 +1837,10 @@ macip_acl_interface_del_acl (acl_main_t * am, u32 sw_if_index)
   rv =
     vnet_set_input_acl_intfc (am->vlib_main, sw_if_index, a->ip4_table_index,
 			      a->ip6_table_index, a->l2_table_index, 0);
+  rv |=
+    vnet_set_output_acl_intfc (am->vlib_main, sw_if_index,
+			       a->out_ip4_table_index, a->out_ip6_table_index,
+			       a->out_l2_table_index, 0);
   /* Unset the MACIP ACL index */
   am->macip_acl_by_sw_if_index[sw_if_index] = ~0;
   return rv;
@@ -1655,6 +1871,10 @@ macip_acl_interface_add_acl (acl_main_t * am, u32 sw_if_index,
   rv =
     vnet_set_input_acl_intfc (am->vlib_main, sw_if_index, a->ip4_table_index,
 			      a->ip6_table_index, a->l2_table_index, 1);
+  rv |=
+    vnet_set_output_acl_intfc (am->vlib_main, sw_if_index,
+			       a->out_ip4_table_index, a->out_ip6_table_index,
+			       a->out_l2_table_index, 1);
   return rv;
 }
 
@@ -2646,6 +2866,10 @@ macip_acl_print (acl_main_t * am, u32 macip_acl_index)
   vlib_cli_output (vm,
 		   "  ip4_table_index %d, ip6_table_index %d, l2_table_index %d\n",
 		   a->ip4_table_index, a->ip6_table_index, a->l2_table_index);
+  vlib_cli_output (vm,
+		   "  out_ip4_table_index %d, out_ip6_table_index %d, out_l2_table_index %d\n",
+		   a->out_ip4_table_index, a->out_ip6_table_index,
+		   a->out_l2_table_index);
   for (i = 0; i < vec_len (a->rules); i++)
     vlib_cli_output (vm, "    rule %d: %U\n", i,
 		     my_macip_acl_rule_t_pretty_format,
@@ -2655,8 +2879,8 @@ macip_acl_print (acl_main_t * am, u32 macip_acl_index)
 
 static clib_error_t *
 acl_show_aclplugin_macip_acl_fn (vlib_main_t * vm,
-				 unformat_input_t * input,
-				 vlib_cli_command_t * cmd)
+				 unformat_input_t *
+				 input, vlib_cli_command_t * cmd)
 {
   clib_error_t *error = 0;
   acl_main_t *am = &acl_main;
@@ -2668,8 +2892,8 @@ acl_show_aclplugin_macip_acl_fn (vlib_main_t * vm,
 
 static clib_error_t *
 acl_show_aclplugin_macip_interface_fn (vlib_main_t * vm,
-				       unformat_input_t * input,
-				       vlib_cli_command_t * cmd)
+				       unformat_input_t *
+				       input, vlib_cli_command_t * cmd)
 {
   clib_error_t *error = 0;
   acl_main_t *am = &acl_main;
@@ -2846,8 +3070,8 @@ acl_show_aclplugin_decode_5tuple_fn (vlib_main_t * vm,
 
 static clib_error_t *
 acl_show_aclplugin_interface_fn (vlib_main_t * vm,
-				 unformat_input_t * input,
-				 vlib_cli_command_t * cmd)
+				 unformat_input_t *
+				 input, vlib_cli_command_t * cmd)
 {
   clib_error_t *error = 0;
   acl_main_t *am = &acl_main;