mirror of
https://github.com/openvswitch/ovs
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90bf1e0732
This commit switches from using the actual protocol values of error codes internally in Open vSwitch, to using abstract values that are translated to and from protocol values at message parsing and serialization time. I believe that this makes the code easier to read and to write. This is also one step along the way toward OpenFlow 1.1 support because OpenFlow 1.1 renumbered a bunch of error codes. Signed-off-by: Ben Pfaff <blp@nicira.com>
93 lines
2.5 KiB
C
93 lines
2.5 KiB
C
/*
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* Copyright (c) 2011 Nicira Networks.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <config.h>
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#include "autopath.h"
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#include <inttypes.h>
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#include <stdlib.h>
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#include "flow.h"
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#include "nx-match.h"
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#include "ofp-errors.h"
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#include "ofp-util.h"
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#include "openflow/nicira-ext.h"
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#include "vlog.h"
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VLOG_DEFINE_THIS_MODULE(autopath);
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/* Loads 'ofp_port' into the appropriate register in accordance with the
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* autopath action. */
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void
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autopath_execute(const struct nx_action_autopath *ap, struct flow *flow,
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uint16_t ofp_port)
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{
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nxm_reg_load(ap->dst, ap->ofs_nbits, ofp_port, flow);
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}
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void
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autopath_parse(struct nx_action_autopath *ap, const char *s_)
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{
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char *s;
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uint32_t reg;
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int id_int, ofs, n_bits;
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char *id_str, *dst, *save_ptr;
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s = xstrdup(s_);
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save_ptr = NULL;
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id_str = strtok_r(s, ", ", &save_ptr);
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dst = strtok_r(NULL, ", ", &save_ptr);
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if (!dst) {
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ovs_fatal(0, "%s: not enough arguments to autopath action", s_);
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}
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id_int = atoi(id_str);
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if (id_int < 1 || id_int > UINT32_MAX) {
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ovs_fatal(0, "%s: autopath id %d is not in valid range "
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"1 to %"PRIu32, s_, id_int, UINT32_MAX);
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}
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nxm_parse_field_bits(dst, ®, &ofs, &n_bits);
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if (n_bits < 16) {
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ovs_fatal(0, "%s: %d-bit destination field has %u possible values, "
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"less than required 65536", s_, n_bits, 1u << n_bits);
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}
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ofputil_init_NXAST_AUTOPATH(ap);
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ap->id = htonl(id_int);
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ap->ofs_nbits = nxm_encode_ofs_nbits(ofs, n_bits);
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ap->dst = htonl(reg);
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free(s);
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}
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enum ofperr
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autopath_check(const struct nx_action_autopath *ap, const struct flow *flow)
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{
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int n_bits = nxm_decode_n_bits(ap->ofs_nbits);
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int ofs = nxm_decode_ofs(ap->ofs_nbits);
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if (n_bits < 16) {
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VLOG_WARN("at least 16 bit destination is required for autopath "
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"action.");
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return OFPERR_OFPBAC_BAD_ARGUMENT;
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}
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return nxm_dst_check(ap->dst, ofs, n_bits, flow);
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}
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