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https://github.com/openvswitch/ovs
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73c0ce349b
Arbitrary ethernet mask support is one step on the way to support for OpenFlow 1.1+. This patch set seeks to add this capability without breaking current protocol support. Signed-off-by: Joe Stringer <joe@wand.net.nz> [blp@nicira.com made some updates, see http://openvswitch.org/pipermail/dev/2012-May/017585.html] Signed-off-by: Ben Pfaff <blp@nicira.com>
137 lines
4.8 KiB
C
137 lines
4.8 KiB
C
/*
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* Copyright (c) 2010, 2011, 2012 Nicira, Inc.
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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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#ifndef NX_MATCH_H
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#define NX_MATCH_H 1
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#include <stdint.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include "flow.h"
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#include "openvswitch/types.h"
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#include "ofp-errors.h"
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struct cls_rule;
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struct ds;
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struct flow;
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struct mf_subfield;
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struct ofpbuf;
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struct nx_action_reg_load;
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struct nx_action_reg_move;
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/* Nicira Extended Match (NXM) flexible flow match helper functions.
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*
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* See include/openflow/nicira-ext.h for NXM specification.
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*/
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enum ofperr nx_pull_match(struct ofpbuf *, unsigned int match_len,
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uint16_t priority, struct cls_rule *,
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ovs_be64 *cookie, ovs_be64 *cookie_mask);
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enum ofperr nx_pull_match_loose(struct ofpbuf *, unsigned int match_len,
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uint16_t priority, struct cls_rule *,
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ovs_be64 *cookie, ovs_be64 *cookie_mask);
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int nx_put_match(struct ofpbuf *, const struct cls_rule *,
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ovs_be64 cookie, ovs_be64 cookie_mask);
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char *nx_match_to_string(const uint8_t *, unsigned int match_len);
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int nx_match_from_string(const char *, struct ofpbuf *);
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void nxm_parse_reg_move(struct nx_action_reg_move *, const char *);
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void nxm_parse_reg_load(struct nx_action_reg_load *, const char *);
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void nxm_format_reg_move(const struct nx_action_reg_move *, struct ds *);
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void nxm_format_reg_load(const struct nx_action_reg_load *, struct ds *);
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enum ofperr nxm_check_reg_move(const struct nx_action_reg_move *,
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const struct flow *);
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enum ofperr nxm_check_reg_load(const struct nx_action_reg_load *,
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const struct flow *);
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void nxm_execute_reg_move(const struct nx_action_reg_move *, struct flow *);
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void nxm_execute_reg_load(const struct nx_action_reg_load *, struct flow *);
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int nxm_field_bytes(uint32_t header);
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int nxm_field_bits(uint32_t header);
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/* Dealing with the 'ofs_nbits' members in several Nicira extensions. */
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static inline ovs_be16
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nxm_encode_ofs_nbits(int ofs, int n_bits)
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{
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return htons((ofs << 6) | (n_bits - 1));
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}
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static inline int
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nxm_decode_ofs(ovs_be16 ofs_nbits)
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{
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return ntohs(ofs_nbits) >> 6;
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}
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static inline int
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nxm_decode_n_bits(ovs_be16 ofs_nbits)
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{
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return (ntohs(ofs_nbits) & 0x3f) + 1;
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}
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void nxm_decode(struct mf_subfield *, ovs_be32 header, ovs_be16 ofs_nbits);
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void nxm_decode_discrete(struct mf_subfield *, ovs_be32 header,
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ovs_be16 ofs, ovs_be16 n_bits);
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BUILD_ASSERT_DECL(FLOW_WC_SEQ == 11);
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/* Upper bound on the length of an nx_match. The longest nx_match (an
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* IPV6 neighbor discovery message using 5 registers) would be:
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*
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* header value mask total
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* ------ ----- ---- -----
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* NXM_OF_IN_PORT 4 2 -- 6
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* NXM_OF_ETH_DST_W 4 6 6 16
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* NXM_OF_ETH_SRC_W 4 6 6 16
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* NXM_OF_ETH_TYPE 4 2 -- 6
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* NXM_OF_VLAN_TCI 4 2 2 8
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* NXM_OF_IP_TOS 4 1 -- 5
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* NXM_NX_IP_ECN 4 1 -- 5
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* NXM_OF_IP_TTL 4 1 -- 5
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* NXM_NX_IP_FRAG 4 1 1 8
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* NXM_OF_IP_PROTO 4 2 -- 6
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* NXM_OF_IPV6_SRC_W 4 16 16 36
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* NXM_OF_IPV6_DST_W 4 16 16 36
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* NXM_OF_IPV6_LABEL 4 4 -- 8
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* NXM_OF_ICMP_TYPE 4 1 -- 5
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* NXM_OF_ICMP_CODE 4 1 -- 5
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* NXM_NX_ND_TARGET 4 16 16 36
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* NXM_NX_ND_SLL 4 6 -- 10
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* NXM_NX_REG_W(0) 4 4 4 12
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* NXM_NX_REG_W(1) 4 4 4 12
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* NXM_NX_REG_W(2) 4 4 4 12
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* NXM_NX_REG_W(3) 4 4 4 12
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* NXM_NX_REG_W(4) 4 4 4 12
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* NXM_NX_REG_W(5) 4 4 4 12
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* NXM_NX_REG_W(6) 4 4 4 12
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* NXM_NX_REG_W(7) 4 4 4 12
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* NXM_NX_TUN_ID_W 4 8 8 20
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* -------------------------------------------
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* total 333
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*
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* So this value is conservative.
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*/
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#define NXM_MAX_LEN 400
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/* This is my guess at the length of a "typical" nx_match, for use in
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* predicting space requirements. */
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#define NXM_TYPICAL_LEN 64
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#endif /* nx-match.h */
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