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/*
* Copyright (c) 2014 Nicira, Inc.
*
* 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.
*/
#include <config.h>
#include "packet-dpif.h"
#include "ofpbuf.h"
struct dpif_packet *
dpif_packet_new_with_headroom(size_t size, size_t headroom)
{
struct dpif_packet *p = xmalloc(sizeof *p);
struct ofpbuf *b = &p->ofpbuf;
ofpbuf_init(b, size + headroom);
ofpbuf_reserve(b, headroom);
return p;
}
struct dpif_packet *
dpif_packet_clone_from_ofpbuf(const struct ofpbuf *b)
{
struct dpif_packet *p = xmalloc(sizeof *p);
size_t headroom = ofpbuf_headroom(b);
ofpbuf_init(&p->ofpbuf, ofpbuf_size(b) + headroom);
ofpbuf_reserve(&p->ofpbuf, headroom);
ofpbuf_put(&p->ofpbuf, ofpbuf_data(b), ofpbuf_size(b));
if (b->frame) {
uintptr_t data_delta
= (char *)ofpbuf_data(&p->ofpbuf) - (char *)ofpbuf_data(b);
p->ofpbuf.frame = (char *) b->frame + data_delta;
}
p->ofpbuf.l2_5_ofs = b->l2_5_ofs;
p->ofpbuf.l3_ofs = b->l3_ofs;
p->ofpbuf.l4_ofs = b->l4_ofs;
return p;
}
struct dpif_packet *
dpif_packet_clone(struct dpif_packet *p)
{
struct dpif_packet *newp;
newp = dpif_packet_clone_from_ofpbuf(&p->ofpbuf);
dpif_packet_set_dp_hash(newp, dpif_packet_get_dp_hash(p));
return newp;
}
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