ACL-plugin add "replace" semantics for adding a new MacIP acl

Change-Id: Ia5c869b2d8b8ad012b9e89fb6720c9c32d9ee065
Signed-off-by: Pavel Kotucek <pkotucek@cisco.com>

4 files changed, 295 insertions, 18 deletions

diff --git a/src/plugins/acl/acl.api b/src/plugins/acl/acl.api
index 48d6aece3a9..a0de24a2340 100644
--- a/src/plugins/acl/acl.api
+++ b/src/plugins/acl/acl.api
@@ -305,7 +305,7 @@ define acl_interface_list_details
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
     @param tag - descriptive value for this MACIP ACL
-    @param count - number of rules in this ACL
+    @param count - number of rules in this MACIP ACL
     @param r - vector of MACIP ACL rules
 */
 
@@ -320,7 +320,7 @@ manual_endian manual_print define macip_acl_add
 
 /** \brief Reply to add MACIP ACL
     @param context - returned sender context, to match reply w/ request
-    @param acl_index - index of the newly created ACL
+    @param acl_index - index of the newly created MACIP ACL
     @param retval 0 - no error
 */
 
@@ -331,6 +331,38 @@ define macip_acl_add_reply
   i32 retval;
 };
 
+/** \brief Add/Replace a MACIP ACL
+    @param client_index - opaque cookie to identify the sender
+    @param context - sender context, to match reply w/ request
+    @param acl_index - an existing MACIP ACL entry (0..0xfffffffe) to replace, or 0xffffffff to make new MACIP ACL
+    @param tag - descriptive value for this MACIP ACL
+    @param count - number of rules in this MACIP ACL
+    @param r - vector of MACIP ACL rules
+*/
+
+manual_endian manual_print define macip_acl_add_replace
+{
+  u32 client_index;
+  u32 context;
+  u32 acl_index; /* ~0 to add, existing MACIP ACL# to replace */
+  u8 tag[64];
+  u32 count;
+  vl_api_macip_acl_rule_t r[count];
+};
+
+/** \brief Reply to add/replace MACIP ACL
+    @param context - returned sender context, to match reply w/ request
+    @param acl_index - index of the newly created MACIP ACL
+    @param retval 0 - no error
+*/
+
+define macip_acl_add_replace_reply
+{
+  u32 context;
+  u32 acl_index;
+  i32 retval;
+};
+
 /** \brief Delete a MACIP ACL
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
@@ -347,7 +379,7 @@ autoreply manual_print define macip_acl_del
 /** \brief Add or delete a MACIP ACL to/from interface
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
-    @param is_add - add (1) or delete (0) ACL from being used on an interface
+    @param is_add - add (1) or delete (0) MACIP ACL from being used on an interface
     @param sw_if_index - interface to apply the action to
     @param acl_index - MACIP ACL index
 */
@@ -357,7 +389,7 @@ autoreply manual_print define macip_acl_interface_add_del
   u32 client_index;
   u32 context;
   u8 is_add;
-  /* macip ACLs are always input */
+  /* MACIP ACLs are always input */
   u32 sw_if_index;
   u32 acl_index;
 };
@@ -365,7 +397,7 @@ autoreply manual_print define macip_acl_interface_add_del
 /** \brief Dump one or all defined MACIP ACLs
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
-    @param acl_index - MACIP ACL index or ~0 to dump all ACLs
+    @param acl_index - MACIP ACL index or ~0 to dump all MACIP ACLs
 */
 
 define macip_acl_dump
@@ -380,7 +412,7 @@ define macip_acl_dump
     @param acl_index - index of this MACIP ACL
     @param tag - descriptive tag which was supplied during the creation
     @param count - length of the vector of MACIP ACL rules
-    @param r - rules comprising this ACL
+    @param r - rules comprising this MACIP ACL
 */
 
 manual_endian manual_print define macip_acl_details
@@ -406,7 +438,7 @@ define macip_acl_interface_get
 /** \brief Reply with the vector of MACIP ACLs by sw_if_index
     @param context - returned sender context, to match reply w/ request
     @param count - total number of elements in the vector
-    @param acls - the vector of active MACACL indices per sw_if_index
+    @param acls - the vector of active MACIP ACL indices per sw_if_index
 */
 
 define macip_acl_interface_get_reply
@@ -419,7 +451,7 @@ define macip_acl_interface_get_reply
 /** \brief Dump the list(s) of MACIP ACLs applied to specific or all interfaces
     @param client_index - opaque cookie to identify the sender
     @param context - sender context, to match reply w/ request
-    @param sw_if_index - interface to dump the ACL list for
+    @param sw_if_index - interface to dump the MACIP ACL list for
 */
 
 define macip_acl_interface_list_dump
@@ -431,9 +463,9 @@ define macip_acl_interface_list_dump
 
 /** \brief Details about a single MACIP ACL contents
     @param context - returned sender context, to match reply w/ request
-    @param sw_if_index - interface for which the list of ACLs is applied
+    @param sw_if_index - interface for which the list of MACIP ACLs is applied
     @param count - total length of acl indices vector
-    @param acls - the vector of ACL indices
+    @param acls - the vector of MACIP ACL indices
 */
 
 define macip_acl_interface_list_details
diff --git a/src/plugins/acl/acl.c b/src/plugins/acl/acl.c
index bf484f6cc41..611efbb7be6 100644
--- a/src/plugins/acl/acl.c
+++ b/src/plugins/acl/acl.c
@@ -71,6 +71,7 @@ _(ACL_INTERFACE_SET_ACL_LIST, acl_interface_set_acl_list)	\
 _(ACL_DUMP, acl_dump)  \
 _(ACL_INTERFACE_LIST_DUMP, acl_interface_list_dump) \
 _(MACIP_ACL_ADD, macip_acl_add) \
+_(MACIP_ACL_ADD_REPLACE, macip_acl_add_replace) \
 _(MACIP_ACL_DEL, macip_acl_del) \
 _(MACIP_ACL_INTERFACE_ADD_DEL, macip_acl_interface_add_del) \
 _(MACIP_ACL_DUMP, macip_acl_dump) \
@@ -1158,6 +1159,18 @@ macip_acl_add_list (u32 count, vl_api_macip_acl_rule_t rules[],
   macip_acl_rule_t *r;
   macip_acl_rule_t *acl_new_rules = 0;
   int i;
+
+  if (*acl_list_index != ~0)
+    {
+      /* They supplied some number, let's see if this MACIP ACL exists */
+      if (pool_is_free_index (am->macip_acls, *acl_list_index))
+  {
+    /* tried to replace a non-existent ACL, no point doing anything */
+          clib_warning("acl-plugin-error: Trying to replace nonexistent MACIP ACL %d (tag %s)", *acl_list_index, tag);
+    return -1;
+  }
+    }
+
   if (0 == count) {
     clib_warning("acl-plugin-warning: Trying to create empty MACIP ACL (tag %s)", tag);
   }
@@ -1180,11 +1193,23 @@ macip_acl_add_list (u32 count, vl_api_macip_acl_rule_t rules[],
       r->src_prefixlen = rules[i].src_ip_prefix_len;
     }
 
-  /* Get ACL index */
-  pool_get_aligned (am->macip_acls, a, CLIB_CACHE_LINE_BYTES);
-  memset (a, 0, sizeof (*a));
-  /* Will return the newly allocated ACL index */
-  *acl_list_index = a - am->macip_acls;
+  if (~0 == *acl_list_index)
+    {
+      /* Get ACL index */
+      pool_get_aligned (am->macip_acls, a, CLIB_CACHE_LINE_BYTES);
+      memset (a, 0, sizeof (*a));
+      /* Will return the newly allocated ACL index */
+      *acl_list_index = a - am->macip_acls;
+    }
+  else
+    {
+      a = &am->macip_acls[*acl_list_index];
+      if (a->rules)
+        {
+          vec_free (a->rules);
+        }
+      macip_destroy_classify_tables (am, *acl_list_index);
+    }
 
   a->rules = acl_new_rules;
   a->count = count;
@@ -1634,6 +1659,30 @@ vl_api_macip_acl_add_t_handler (vl_api_macip_acl_add_t * mp)
 }
 
 static void
+vl_api_macip_acl_add_replace_t_handler (vl_api_macip_acl_add_replace_t * mp)
+{
+  vl_api_macip_acl_add_replace_reply_t *rmp;
+  acl_main_t *am = &acl_main;
+  int rv;
+  u32 acl_list_index = ntohl (mp->acl_index);
+  u32 acl_count = ntohl (mp->count);
+  u32 expected_len = sizeof(*mp) + acl_count*sizeof(mp->r[0]);
+
+  if (verify_message_len(mp, expected_len, "macip_acl_add_replace")) {
+      rv = macip_acl_add_list (acl_count, mp->r, &acl_list_index, mp->tag);
+  } else {
+      rv = VNET_API_ERROR_INVALID_VALUE;
+  }
+
+  /* *INDENT-OFF* */
+  REPLY_MACRO2(VL_API_MACIP_ACL_ADD_REPLACE_REPLY,
+  ({
+    rmp->acl_index = htonl(acl_list_index);
+  }));
+  /* *INDENT-ON* */
+}
+
+static void
 vl_api_macip_acl_del_t_handler (vl_api_macip_acl_del_t * mp)
 {
   acl_main_t *am = &acl_main;
diff --git a/src/plugins/acl/acl_test.c b/src/plugins/acl/acl_test.c
index 2b5175852e4..abb9643ef1c 100644
--- a/src/plugins/acl/acl_test.c
+++ b/src/plugins/acl/acl_test.c
@@ -72,7 +72,8 @@ _(macip_acl_del_reply)
 
 #define foreach_reply_retval_aclindex_handler  \
 _(acl_add_replace_reply) \
-_(macip_acl_add_reply)
+_(macip_acl_add_reply) \
+_(macip_acl_add_replace_reply)
 
 #define _(n)                                            \
     static void vl_api_##n##_t_handler                  \
@@ -272,6 +273,7 @@ _(ACL_INTERFACE_SET_ACL_LIST_REPLY, acl_interface_set_acl_list_reply) \
 _(ACL_INTERFACE_LIST_DETAILS, acl_interface_list_details)  \
 _(ACL_DETAILS, acl_details)  \
 _(MACIP_ACL_ADD_REPLY, macip_acl_add_reply) \
+_(MACIP_ACL_ADD_REPLACE_REPLY, macip_acl_add_replace_reply) \
 _(MACIP_ACL_DEL_REPLY, macip_acl_del_reply) \
 _(MACIP_ACL_DETAILS, macip_acl_details)  \
 _(MACIP_ACL_INTERFACE_ADD_DEL_REPLY, macip_acl_interface_add_del_reply)  \
@@ -965,8 +967,6 @@ static int api_macip_acl_add (vat_main_t * vam)
 
     if(rules)
       n_rules = vec_len(rules);
-    else
-      n_rules = 0;
 
     if (n_rules_override >= 0)
       n_rules = n_rules_override;
@@ -1000,6 +1000,159 @@ static int api_macip_acl_add (vat_main_t * vam)
     return ret;
 }
 
+static int api_macip_acl_add_replace (vat_main_t * vam)
+{
+    acl_test_main_t * sm = &acl_test_main;
+    unformat_input_t * i = vam->input;
+    vl_api_macip_acl_add_replace_t * mp;
+    u32 acl_index = ~0;
+    u32 msg_size = sizeof (*mp); /* without the rules */
+
+    vl_api_macip_acl_rule_t *rules = 0;
+    int rule_idx = 0;
+    int n_rules = 0;
+    int n_rules_override = -1;
+    u32 src_prefix_length = 0;
+    u32 action = 0;
+    ip4_address_t src_v4address;
+    ip6_address_t src_v6address;
+    u8 src_mac[6];
+    u8 *tag = 0;
+    u8 mac_mask_all_1[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+    int ret;
+
+    if (!unformat (i, "%d", &acl_index)) {
+        /* Just assume -1 */
+    }
+
+    while (unformat_check_input (i) != UNFORMAT_END_OF_INPUT)
+    {
+        if (unformat (i, "ipv6"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "ipv4"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_ipv6 = 0;
+          }
+        else if (unformat (i, "permit"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = 1;
+          }
+        else if (unformat (i, "deny"))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = 0;
+          }
+        else if (unformat (i, "count %d", &n_rules_override))
+          {
+            /* we will use this later */
+          }
+        else if (unformat (i, "action %d", &action))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            rules[rule_idx].is_permit = action;
+          }
+        else if (unformat (i, "ip %U/%d",
+         unformat_ip4_address, &src_v4address, &src_prefix_length) ||
+                 unformat (i, "ip %U",
+         unformat_ip4_address, &src_v4address))
+          {
+            if (src_prefix_length == 0)
+              src_prefix_length = 32;
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_ip_addr, &src_v4address, 4);
+            rules[rule_idx].src_ip_prefix_len = src_prefix_length;
+            rules[rule_idx].is_ipv6 = 0;
+          }
+        else if (unformat (i, "src"))
+          {
+            /* Everything in MACIP is "source" but allow this verbosity */
+          }
+        else if (unformat (i, "ip %U/%d",
+         unformat_ip6_address, &src_v6address, &src_prefix_length) ||
+                 unformat (i, "ip %U",
+         unformat_ip6_address, &src_v6address))
+          {
+            if (src_prefix_length == 0)
+              src_prefix_length = 128;
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_ip_addr, &src_v6address, 16);
+            rules[rule_idx].src_ip_prefix_len = src_prefix_length;
+            rules[rule_idx].is_ipv6 = 1;
+          }
+        else if (unformat (i, "mac %U",
+         my_unformat_mac_address, &src_mac))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_mac, &src_mac, 6);
+            memcpy (rules[rule_idx].src_mac_mask, &mac_mask_all_1, 6);
+          }
+        else if (unformat (i, "mask %U",
+         my_unformat_mac_address, &src_mac))
+          {
+            vec_validate_macip_acl_rules(rules, rule_idx);
+            memcpy (rules[rule_idx].src_mac_mask, &src_mac, 6);
+          }
+        else if (unformat (i, "tag %s", &tag))
+          {
+          }
+        else if (unformat (i, ","))
+          {
+            rule_idx++;
+            vec_validate_macip_acl_rules(rules, rule_idx);
+          }
+        else
+    break;
+    }
+
+    if (!rules)
+      {
+      errmsg ("rule/s required\n");
+      return -99;
+      }
+    /* Construct the API message */
+    vam->result_ready = 0;
+
+    if(rules)
+      n_rules = vec_len(rules);
+
+    if (n_rules_override >= 0)
+      n_rules = n_rules_override;
+
+    msg_size += n_rules*sizeof(rules[0]);
+
+    mp = vl_msg_api_alloc_as_if_client(msg_size);
+    memset (mp, 0, msg_size);
+    mp->_vl_msg_id = ntohs (VL_API_MACIP_ACL_ADD_REPLACE + sm->msg_id_base);
+    mp->client_index = vam->my_client_index;
+    if ((n_rules > 0) && rules)
+      clib_memcpy(mp->r, rules, n_rules*sizeof (mp->r[0]));
+    if (tag)
+      {
+        if (vec_len(tag) >= sizeof(mp->tag))
+          {
+            tag[sizeof(mp->tag)-1] = 0;
+            _vec_len(tag) = sizeof(mp->tag);
+          }
+        clib_memcpy(mp->tag, tag, vec_len(tag));
+        vec_free(tag);
+      }
+
+    mp->acl_index = ntohl(acl_index);
+    mp->count = htonl(n_rules);
+
+    /* send it... */
+    S(mp);
+
+    /* Wait for a reply... */
+    W (ret);
+    return ret;
+}
+
 /*
  * List of messages that the api test plugin sends,
  * and that the data plane plugin processes
@@ -1013,6 +1166,7 @@ _(acl_interface_add_del, "<intfc> | sw_if_index <if-idx> [add|del] [input|output
 _(acl_interface_set_acl_list, "<intfc> | sw_if_index <if-idx> input [acl-idx list] output [acl-idx list]") \
 _(acl_interface_list_dump, "[<intfc> | sw_if_index <if-idx>]") \
 _(macip_acl_add, "...") \
+_(macip_acl_add_replace, "<acl-idx> [<ipv4|ipv6> <permit|deny|action N> [count <count>] [src] ip <ipaddress/[plen]> mac <mac> mask <mac_mask>, ... , ...") \
 _(macip_acl_del, "<acl-idx>")\
 _(macip_acl_dump, "[<acl-idx>]") \
 _(macip_acl_interface_add_del, "<intfc> | sw_if_index <if-idx> [add|del] acl <acl-idx>") \
diff --git a/src/plugins/acl/manual_fns.h b/src/plugins/acl/manual_fns.h
index c37d14b63a9..e00f1abcc61 100644
--- a/src/plugins/acl/manual_fns.h
+++ b/src/plugins/acl/manual_fns.h
@@ -89,6 +89,18 @@ vl_api_macip_acl_add_t_endian (vl_api_macip_acl_add_t * a)
   vl_api_macip_acl_rule_t_array_endian (a->r, a->count);
 }
 
+static inline void
+vl_api_macip_acl_add_replace_t_endian (vl_api_macip_acl_add_replace_t * a)
+{
+  a->_vl_msg_id = clib_net_to_host_u16 (a->_vl_msg_id);
+  a->client_index = clib_net_to_host_u32 (a->client_index);
+  a->context = clib_net_to_host_u32 (a->context);
+  a->acl_index = clib_net_to_host_u32 (a->acl_index);
+  /* a->tag[0..63] = a->tag[0..63] (no-op) */
+  a->count = clib_net_to_host_u32 (a->count);
+  vl_api_macip_acl_rule_t_array_endian (a->r, a->count);
+}
+
 static inline u8 *
 format_acl_action(u8 *s, u8 action)
 {
@@ -292,6 +304,36 @@ vl_api_macip_acl_add_t_print (vl_api_macip_acl_add_t * a, void *handle)
   return handle;
 }
 
+static inline void *
+vl_api_macip_acl_add_replace_t_print (vl_api_macip_acl_add_replace_t * a, void *handle)
+{
+  u8 *s = 0;
+  int i;
+  u32 acl_index = clib_net_to_host_u32 (a->acl_index);
+  u32 count = clib_net_to_host_u32 (a->count);
+  if (count > 0x100000)
+    {
+      s = format (s, "WARN: macip_acl_add_replace count endianness wrong? Fixup to avoid long loop.\n");
+      count = a->count;
+    }
+
+  s = format (s, "SCRIPT: macip_acl_add_replace %d count %d ",
+        acl_index, count);
+  if (a->tag[0])
+    s = format (s, "tag %s ", a->tag);
+
+  s = format (s, "count %d \\\n", count);
+
+  PRINT_S;
+
+  for (i = 0; i < count; i++)
+    vl_api_macip_acl_rule_t_print (&a->r[i], handle);
+
+  s = format (0, "\n");
+  PRINT_S;
+
+  return handle;
+}
 
 static inline void *
 vl_api_acl_interface_set_acl_list_t_print (vl_api_acl_interface_set_acl_list_t