#include <vnet/fib/fib_table.h>
#include <vppinfra/lock.h>
+/**
+ * @file
+ * @brief N-tuple classifier
+ */
+
vnet_classify_main_t vnet_classify_main;
#if VALIDATION_SCAFFOLDING
u8 *mask = 0;
u8 found_something = 0;
ip4_header_t *ip;
+ u32 src_prefix_len = 32;
+ u32 src_prefix_mask = ~0;
+ u32 dst_prefix_len = 32;
+ u32 dst_prefix_mask = ~0;
#define _(a) u8 a=0;
foreach_ip4_proto_field;
version = 1;
else if (unformat (input, "hdr_length"))
hdr_length = 1;
+ else if (unformat (input, "src/%d", &src_prefix_len))
+ {
+ src_address = 1;
+ src_prefix_mask &= ~((1 << (32 - src_prefix_len)) - 1);
+ src_prefix_mask = clib_host_to_net_u32 (src_prefix_mask);
+ }
+ else if (unformat (input, "dst/%d", &dst_prefix_len))
+ {
+ dst_address = 1;
+ dst_prefix_mask &= ~((1 << (32 - dst_prefix_len)) - 1);
+ dst_prefix_mask = clib_host_to_net_u32 (dst_prefix_mask);
+ }
else if (unformat (input, "src"))
src_address = 1;
else if (unformat (input, "dst"))
foreach_ip4_proto_field;
#undef _
+ if (src_address)
+ ip->src_address.as_u32 = src_prefix_mask;
+
+ if (dst_address)
+ ip->dst_address.as_u32 = dst_prefix_mask;
+
ip->ip_version_and_header_length = 0;
if (version)
if (!is_add && table_index == ~0)
return clib_error_return (0, "table index required for delete");
- rv = vnet_classify_add_del_table (cm, mask, nbuckets, memory_size,
+ rv = vnet_classify_add_del_table (cm, mask, nbuckets, (u32) memory_size,
skip, match, next_table_index,
miss_next_index, &table_index,
current_data_flag, current_data_offset,
}
/* *INDENT-OFF* */
-VLIB_CLI_COMMAND (classify_table, static) = {
+VLIB_CLI_COMMAND (classify_table, static) =
+{
.path = "classify table",
.short_help =
"classify table [miss-next|l2-miss_next|acl-miss-next <next_index>]"
};
/* *INDENT-ON* */
+static int
+filter_table_mask_compare (void *a1, void *a2)
+{
+ vnet_classify_main_t *cm = &vnet_classify_main;
+ u32 *ti1 = a1;
+ u32 *ti2 = a2;
+ u32 n1 = 0, n2 = 0;
+ vnet_classify_table_t *t1, *t2;
+ u8 *m1, *m2;
+ int i;
+
+ t1 = pool_elt_at_index (cm->tables, *ti1);
+ t2 = pool_elt_at_index (cm->tables, *ti2);
+
+ m1 = (u8 *) (t1->mask);
+ m2 = (u8 *) (t2->mask);
+
+ for (i = 0; i < vec_len (t1->mask) * sizeof (u32x4); i++)
+ {
+ n1 += count_set_bits (m1[0]);
+ m1++;
+ }
+
+ for (i = 0; i < vec_len (t2->mask) * sizeof (u32x4); i++)
+ {
+ n2 += count_set_bits (m2[0]);
+ m2++;
+ }
+
+ /* Reverse sort: descending number of set bits */
+ if (n1 < n2)
+ return 1;
+ else if (n1 > n2)
+ return -1;
+ else
+ return 0;
+}
+
+static clib_error_t *
+classify_filter_command_fn (vlib_main_t * vm,
+ unformat_input_t * input,
+ vlib_cli_command_t * cmd)
+{
+ u32 nbuckets = 8;
+ vnet_main_t *vnm = vnet_get_main ();
+ uword memory_size = (uword) (128 << 10);
+ u32 skip = ~0;
+ u32 match = ~0;
+ u8 *match_vector;
+ int is_add = 1;
+ int del_chain = 0;
+ u32 table_index = ~0;
+ u32 next_table_index = ~0;
+ u32 miss_next_index = ~0;
+ u32 current_data_flag = 0;
+ int current_data_offset = 0;
+ int i;
+ vnet_classify_table_t *t;
+ u8 *mask = 0;
+ vnet_classify_main_t *cm = &vnet_classify_main;
+ int rv = 0;
+
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (unformat (input, "del"))
+ is_add = 0;
+ else if (unformat (input, "buckets %d", &nbuckets))
+ ;
+ else if (unformat (input, "mask %U", unformat_classify_mask,
+ &mask, &skip, &match))
+ ;
+ else if (unformat (input, "memory-size %U", unformat_memory_size,
+ &memory_size))
+ ;
+ else
+ break;
+ }
+
+ if (is_add && mask == 0 && table_index == ~0)
+ return clib_error_return (0, "Mask required");
+
+ if (is_add && skip == ~0 && table_index == ~0)
+ return clib_error_return (0, "skip count required");
+
+ if (is_add && match == ~0 && table_index == ~0)
+ return clib_error_return (0, "match count required");
+
+ if (!is_add)
+ {
+ if (vec_len (vnm->classify_filter_table_indices) == 0)
+ return clib_error_return (0, "No classify filter set...");
+
+ del_chain = 1;
+ table_index = vnm->classify_filter_table_indices[0];
+ vec_reset_length (vnm->classify_filter_table_indices);
+ }
+
+ /* see if we already have a table for that... */
+
+ if (is_add)
+ {
+ for (i = 0; i < vec_len (vnm->classify_filter_table_indices); i++)
+ {
+ t = pool_elt_at_index (cm->tables, i);
+ /* classifier geometry mismatch, can't use this table */
+ if (t->match_n_vectors != match || t->skip_n_vectors != skip)
+ continue;
+ /* Masks aren't congruent, can't use this table */
+ if (vec_len (t->mask) != vec_len (mask))
+ continue;
+ /* Masks aren't bit-for-bit identical, can't use this table */
+ if (memcmp (t->mask, mask, vec_len (mask)))
+ continue;
+
+ /* Winner... */
+ table_index = i;
+ goto found_table;
+ }
+ }
+
+ rv = vnet_classify_add_del_table (cm, mask, nbuckets, memory_size,
+ skip, match, next_table_index,
+ miss_next_index, &table_index,
+ current_data_flag, current_data_offset,
+ is_add, del_chain);
+ vec_free (mask);
+
+ switch (rv)
+ {
+ case 0:
+ break;
+
+ default:
+ return clib_error_return (0, "vnet_classify_add_del_table returned %d",
+ rv);
+ }
+
+ if (is_add == 0)
+ return 0;
+
+ /* Remember the table */
+ vec_add1 (vnm->classify_filter_table_indices, table_index);
+
+found_table:
+
+ /* Now try to parse a session */
+ if (unformat (input, "match %U", unformat_classify_match,
+ cm, &match_vector, table_index) == 0)
+ return 0;
+
+
+ /*
+ * We use hit or miss to determine whether to trace or pcap pkts
+ * so the session setup is very limited
+ */
+ rv = vnet_classify_add_del_session (cm, table_index,
+ match_vector, 0 /* hit_next_index */ ,
+ 0 /* opaque_index */ ,
+ 0 /* advance */ ,
+ 0 /* action */ ,
+ 0 /* metadata */ ,
+ 1 /* is_add */ );
+
+ vec_free (match_vector);
+
+ /* Sort filter tables from most-specific mask to least-specific mask */
+ vec_sort_with_function (vnm->classify_filter_table_indices,
+ filter_table_mask_compare);
+
+ ASSERT (vec_len (vnm->classify_filter_table_indices));
+
+ /* Setup next_table_index fields */
+ for (i = 0; i < vec_len (vnm->classify_filter_table_indices); i++)
+ {
+ t = pool_elt_at_index (cm->tables,
+ vnm->classify_filter_table_indices[i]);
+
+ if ((i + 1) < vec_len (vnm->classify_filter_table_indices))
+ t->next_table_index = vnm->classify_filter_table_indices[i + 1];
+ else
+ t->next_table_index = ~0;
+ }
+
+ return 0;
+}
+
+/*?
+ * Construct an arbitrary set of packet classifier tables for use with
+ * "pcap rx | tx trace," and (eventually) with the vpp packet
+ * tracer
+ *
+ * Packets which match a rule in the classifier table chain
+ * will be traced. The tables are automatically ordered so that
+ * matches in the most specific table are tried first.
+ *
+ * It's reasonably likely that folks will configure a single
+ * table with one or two matches. As a result, we configure
+ * 8 hash buckets and 128K of match rule space. One can override
+ * the defaults by specifiying "buckets <nnn>" and "memory-size <xxx>"
+ * as desired.
+ *
+ * To build up complex filter chains, repeatedly issue the
+ * classify filter debug CLI command. Each command must specify the desired
+ * mask and match values. If a classifier table with a suitable mask
+ * already exists, the CLI command adds a match rule to the existing table.
+ * If not, the CLI command add a new table and the indicated mask rule
+ *
+ * Here is a terse description of the "mask <xxx>" syntax:
+ *
+ * l2 src dst proto tag1 tag2 ignore-tag1 ignore-tag2 cos1 cos2 dot1q dot1ad
+ *
+ * l3 ip4 <ip4-mask> ip6 <ip6-mask>
+ *
+ * <ip4-mask> version hdr_length src[/width] dst[/width]
+ * tos length fragment_id ttl protocol checksum
+ *
+ * <ip6-mask> version traffic-class flow-label src dst proto
+ * payload_length hop_limit protocol
+ *
+ * l4 tcp <tcp-mask> udp <udp_mask> src_port dst_port
+ *
+ * <tcp-mask> src dst # ports
+ *
+ * <udp-mask> src_port dst_port
+ *
+ * To construct matches, add the values to match after the indicated keywords:
+ * in the match syntax. For example:
+ * mask l3 ip4 src -> match l3 ip4 src 192.168.1.11
+ *
+ * @cliexpar
+ * Configuring the classify filter
+ *
+ * Configure a simple classify filter, and configure pcap rx trace to use it:
+ *
+ * <b><em>classify filter mask l3 ip4 src match l3 ip4 src 192.168.1.11"</em></b><br>
+ * <b><em>pcap rx trace on max 100 filter</em></b>
+ *
+ * Configure another fairly simple filter
+ *
+ * <b><em>classify filter mask l3 ip4 src dst match l3 ip4 src 192.168.1.10 dst 192.168.2.10"</em></b>
+ *
+ * Clear all current classifier filters
+ *
+ * <b><em>classify filter del</em></b>
+ *
+ * To inspect the classifier tables, use
+ *
+ * <b><em>show classify table [verbose]</em></b>
+ * The verbose form displays all of the match rules, with hit-counters
+ * @cliexend
+ ?*/
+/* *INDENT-OFF* */
+VLIB_CLI_COMMAND (classify_filter, static) =
+{
+ .path = "classify filter",
+ .short_help =
+ "classify filter mask <mask-value> match <match-value> [del]"
+ "[buckets <nn>] [memory-size <n>]",
+ .function = classify_filter_command_fn,
+};
+/* *INDENT-ON* */
+
static u8 *
format_vnet_classify_table (u8 * s, va_list * args)
{
VLIB_INIT_FUNCTION (vnet_classify_init);
-#define TEST_CODE 1
+#define TEST_CODE 0
#if TEST_CODE > 0
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