blob: acfcb84bc611540a7a7e998393342344222fb654 [file] [log] [blame]
:: # Copyright 2013, Big Switch Networks, Inc.
:: #
:: # LoxiGen is licensed under the Eclipse Public License, version 1.0 (EPL), with
:: # the following special exception:
:: #
:: # LOXI Exception
:: #
:: # As a special exception to the terms of the EPL, you may distribute libraries
:: # generated by LoxiGen (LoxiGen Libraries) under the terms of your choice, provided
:: # that copyright and licensing notices generated by LoxiGen are not altered or removed
:: # from the LoxiGen Libraries and the notice provided below is (i) included in
:: # the LoxiGen Libraries, if distributed in source code form and (ii) included in any
:: # documentation for the LoxiGen Libraries, if distributed in binary form.
:: #
:: # Notice: "Copyright 2013, Big Switch Networks, Inc. This library was generated by the LoxiGen Compiler."
:: #
:: # You may not use this file except in compliance with the EPL or LOXI Exception. You may obtain
:: # a copy of the EPL at:
:: #
:: # http://www.eclipse.org/legal/epl-v10.html
:: #
:: # 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
:: # EPL for the specific language governing permissions and limitations
:: # under the EPL.
::
/* Copyright 2013, Big Switch Networks, Inc. */
/****************************************************************
*
* of_wire_buf.c
*
* Implementation of more complicated of_wire_buf operations
*
****************************************************************/
#include <loci/loci.h>
#if 0
static of_match_v1_t *
wire_buf_v1_to_match(of_wire_buffer_t *wbuf, int offset)
{
of_match_v1_t *match;
match = of_match_v1_new(OF_VERSION_1_0);
return match;
}
/*
* First pass at wire buf to match conversions. These involve a lot
* of copying and could be made more efficient.
*/
int
of_wire_buffer_of_match_get(of_object_t *obj, int offset, of_match_t *match)
{
switch (obj->version) {
case OF_VERSION_1_0:
break;
case OF_VERSION_1_1:
break;
case OF_VERSION_1_2:
break;
default:
return OF_ERROR_VERSION;
break;
}
return OF_ERROR_NONE;
}
/**
* Write a host match structure into the wire buffer
* @param obj The object that owns the buffer to write to
* @param offset The start location in the wire buffer
* @param match Pointer to the host match object
* @param cur_len The current length of the object in the buffer
*
* If the current length is different than the length of the new data
* being written, then move the remains of the buffer. This only applies
* to version 1.2 (though it should apply to 1.1).
*/
int
of_wire_buffer_of_match_set(of_object_t *obj, int offset,
of_match_t *match, int cur_len)
{
// of_octets_t octets;
switch (obj->version) {
case OF_VERSION_1_0:
break;
case OF_VERSION_1_1:
break;
case OF_VERSION_1_2:
// of_match_v3_serialize(match, &octets);
break;
default:
return OF_ERROR_VERSION;
break;
}
return OF_ERROR_NONE;
}
#endif
/**
* Replace data in the data buffer, possibly with a new
* length or appending to buffer.
*
* @param wbuf The wire buffer being updated.
* @param offset The start point of the update
* @param old_len The number of bytes being replaced
* @param data Source of bytes to write into the buffer
* @param new_len The number of bytes to write
*
* The buffer may grow for this operation. Current byte count
* is pre-grow for the replace.
*
* The current byte count for the buffer is updated.
*
*/
void
of_wire_buffer_replace_data(of_wire_buffer_t *wbuf,
int offset,
int old_len,
uint8_t *data,
int new_len)
{
int bytes;
uint8_t *src_ptr, *dst_ptr;
int cur_bytes;
ASSERT(wbuf != NULL);
cur_bytes = wbuf->current_bytes;
/* Doesn't make sense; mismatch in current buffer info */
ASSERT(old_len + offset <= wbuf->current_bytes);
if (old_len < new_len) {
of_wire_buffer_grow(wbuf, offset + new_len);
} else {
wbuf->current_bytes += (new_len - old_len); // may decrease size
}
if ((old_len + offset < cur_bytes) && (old_len != new_len)) {
/* Need to move back of buffer */
src_ptr = &wbuf->buf[offset + old_len];
dst_ptr = &wbuf->buf[offset + new_len];
bytes = cur_bytes - (offset + old_len);
MEMMOVE(dst_ptr, src_ptr, bytes);
}
dst_ptr = &wbuf->buf[offset];
MEMCPY(dst_ptr, data, new_len);
ASSERT(wbuf->current_bytes == cur_bytes + (new_len - old_len));
}