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/*
* Copyright (c) 2011, 2012 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 "autopath.h"
#include <inttypes.h>
#include <stdlib.h>
#include "flow.h"
#include "meta-flow.h"
#include "nx-match.h"
#include "ofp-actions.h"
#include "ofp-errors.h"
#include "ofp-util.h"
#include "openflow/nicira-ext.h"
#include "vlog.h"
VLOG_DEFINE_THIS_MODULE(autopath);
void
autopath_parse(struct ofpact_autopath *ap, const char *s_)
{
char *s;
char *id_str, *dst, *save_ptr;
uint16_t port;
ofpact_init_AUTOPATH(ap);
s = xstrdup(s_);
save_ptr = NULL;
id_str = strtok_r(s, ", ", &save_ptr);
dst = strtok_r(NULL, ", ", &save_ptr);
if (!dst) {
ovs_fatal(0, "%s: not enough arguments to autopath action", s_);
}
if (!ofputil_port_from_string(id_str, &port)) {
ovs_fatal(0, "%s: bad port number", s_);
}
ap->port = port;
mf_parse_subfield(&ap->dst, dst);
if (ap->dst.n_bits < 16) {
ovs_fatal(0, "%s: %d-bit destination field has %u possible values, "
"less than required 65536",
s_, ap->dst.n_bits, 1u << ap->dst.n_bits);
}
free(s);
}
enum ofperr
autopath_from_openflow(const struct nx_action_autopath *nap,
struct ofpact_autopath *autopath)
{
ofpact_init_AUTOPATH(autopath);
autopath->dst.field = mf_from_nxm_header(ntohl(nap->dst));
autopath->dst.ofs = nxm_decode_ofs(nap->ofs_nbits);
autopath->dst.n_bits = nxm_decode_n_bits(nap->ofs_nbits);
autopath->port = ntohl(nap->id);
if (autopath->dst.n_bits < 16) {
VLOG_WARN("at least 16 bit destination is required for autopath "
"action.");
return OFPERR_OFPBAC_BAD_ARGUMENT;
}
return autopath_check(autopath, NULL);
}
enum ofperr
autopath_check(const struct ofpact_autopath *autopath, const struct flow *flow)
{
VLOG_WARN_ONCE("The autopath action is deprecated and may be removed in"
" February 2013. Please email dev@openvswitch.org with"
" concerns.");
return mf_check_dst(&autopath->dst, flow);
}
void
autopath_to_nxast(const struct ofpact_autopath *autopath,
struct ofpbuf *openflow)
{
struct nx_action_autopath *ap;
ap = ofputil_put_NXAST_AUTOPATH__DEPRECATED(openflow);
ap->ofs_nbits = nxm_encode_ofs_nbits(autopath->dst.ofs,
autopath->dst.n_bits);
ap->dst = htonl(autopath->dst.field->nxm_header);
ap->id = htonl(autopath->port);
}
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