--- /dev/null
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ * pg_edit.h: packet generator edits
+ *
+ * Copyright (c) 2008 Eliot Dresselhaus
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef included_packet_generator_pg_edit_h
+#define included_packet_generator_pg_edit_h
+
+#include <vppinfra/format.h>
+#include <vppinfra/vec.h>
+
+typedef enum
+{
+ /* Invalid type used to poison edits. */
+ PG_EDIT_INVALID_TYPE,
+
+ /* Value is fixed: does not change for all packets in sequence. */
+ PG_EDIT_FIXED,
+
+ /* Value v increments between low and high values v_low <= v <= v_high. */
+ PG_EDIT_INCREMENT,
+
+ /* Random value between low and high values v_low <= v <= v_high. */
+ PG_EDIT_RANDOM,
+
+ /* Unspecified value; will be specified by some edit function. */
+ PG_EDIT_UNSPECIFIED,
+} pg_edit_type_t;
+
+typedef struct
+{
+ pg_edit_type_t type;
+
+ /* Bit offset within packet where value is to be written.
+ Bits are written in network byte order: high bits first.
+ This is the bit offset of the least significant bit: i.e. the
+ highest numbered byte * 8 plus bit offset within that byte.
+ Negative offsets encode special edits. */
+ i32 lsb_bit_offset;
+
+ /* Special offset indicating this edit is for packet length. */
+#define PG_EDIT_PACKET_LENGTH (-1)
+
+ /* Number of bits in edit. */
+ u32 n_bits;
+
+ /* Low and high values for this edit. Network byte order. */
+ u8 *values[2];
+#define PG_EDIT_LO 0
+#define PG_EDIT_HI 1
+
+ /* Last value used for increment edit type. */
+ u64 last_increment_value;
+} pg_edit_t;
+
+always_inline void
+pg_edit_free (pg_edit_t * e)
+{
+ int i;
+ for (i = 0; i < ARRAY_LEN (e->values); i++)
+ vec_free (e->values[i]);
+}
+
+#define pg_edit_init_bitfield(e,type,field,field_offset,field_n_bits) \
+do { \
+ u32 _bo; \
+ \
+ ASSERT ((field_offset) < STRUCT_BITS_OF (type, field)); \
+ \
+ /* Start byte offset. */ \
+ _bo = STRUCT_OFFSET_OF (type, field); \
+ \
+ /* Adjust for big endian byte order. */ \
+ _bo += ((STRUCT_BITS_OF (type, field) \
+ - (field_offset) - 1) / BITS (u8)); \
+ \
+ (e)->lsb_bit_offset = _bo * BITS (u8) + ((field_offset) % BITS (u8)); \
+ (e)->n_bits = (field_n_bits); \
+} while (0)
+
+/* Initialize edit for byte aligned fields. */
+#define pg_edit_init(e,type,field) \
+ pg_edit_init_bitfield(e,type,field,0,STRUCT_BITS_OF(type,field))
+
+static inline uword
+pg_edit_n_alloc_bytes (pg_edit_t * e)
+{
+ int i0, i1, n_bytes, n_bits_left;
+
+ i0 = e->lsb_bit_offset;
+ i1 = i0 % BITS (u8);
+
+ n_bytes = 0;
+ n_bits_left = e->n_bits;
+
+ if (n_bits_left > 0 && i1 != 0)
+ {
+ n_bytes++;
+ n_bits_left -= i1;
+ if (n_bits_left < 0)
+ n_bits_left = 0;
+ }
+
+ n_bytes += (n_bits_left / BITS (u8));
+ n_bytes += (n_bits_left % BITS (u8)) != 0;
+
+ return n_bytes;
+}
+
+static inline void
+pg_edit_alloc_value (pg_edit_t * e, int i)
+{
+ vec_validate (e->values[i], e->lsb_bit_offset / BITS (u8));
+}
+
+extern void pg_edit_set_value (pg_edit_t * e, int hi_or_lo, u64 value);
+
+static inline void
+pg_edit_set_fixed (pg_edit_t * e, u64 value)
+{
+ e->type = PG_EDIT_FIXED;
+ pg_edit_set_value (e, PG_EDIT_LO, value);
+}
+
+static inline void
+pg_edit_copy_type_and_values (pg_edit_t * dst, pg_edit_t * src)
+{
+ int i;
+ dst->type = src->type;
+ src->type = PG_EDIT_INVALID_TYPE;
+ for (i = 0; i < ARRAY_LEN (dst->values); i++)
+ {
+ dst->values[i] = src->values[i];
+ src->values[i] = 0;
+ }
+}
+
+static inline u64
+pg_edit_get_value (pg_edit_t * e, int hi_or_lo)
+{
+ u64 r = 0;
+ int i, n;
+ u8 *v = e->values[hi_or_lo];
+
+ n = round_pow2 (e->n_bits, BITS (u8)) / BITS (u8);
+
+ ASSERT (n <= vec_len (v));
+ ASSERT (n <= sizeof (r));
+
+ for (i = 0; i < n; i++)
+ r = (r << BITS (v[i])) + v[i];
+
+ return r;
+}
+
+static inline uword
+pg_edit_is_fixed_with_value (pg_edit_t * e, u64 value)
+{
+ return (e->type == PG_EDIT_FIXED
+ && value == pg_edit_get_value (e, PG_EDIT_LO));
+}
+
+uword unformat_pg_edit (unformat_input_t * input, va_list * args);
+uword unformat_pg_payload (unformat_input_t * input, va_list * args);
+uword unformat_pg_number (unformat_input_t * input, va_list * args);
+uword unformat_pg_interface (unformat_input_t * input, va_list * args);
+
+#endif /* included_packet_generator_pg_edit_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */
Code Review / vpp.git / blobdiff