mirror of
https://github.com/openvswitch/ovs
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a61680c6d1
Add support matching the IPv4 TTL and IPv6 hop limit fields. This commit also adds support for modifying the IPv4 TTL. Modifying the IPv6 hop limit isn't currently supported, since we don't support modifying IPv6 headers. We will likely want to change the user-space interface, since basic matching and setting the TTL are not generally useful. We will probably want the ability to match on extraordinary events (such as TTL of 0 or 1) and a decrement action. Feature #8024 Signed-off-by: Justin Pettit <jpettit@nicira.com> Acked-by: Jesse Gross <jesse@nicira.com>
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*
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* Copyright (c) 2009, 2010, 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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#ifndef ODP_UTIL_H
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#define ODP_UTIL_H 1
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <linux/openvswitch.h>
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#include "hash.h"
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#include "openflow/openflow.h"
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#include "util.h"
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struct ds;
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struct flow;
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struct nlattr;
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struct ofpbuf;
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#define OVSP_NONE ((uint16_t) -1)
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static inline uint16_t
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ofp_port_to_odp_port(uint16_t ofp_port)
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{
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switch (ofp_port) {
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case OFPP_LOCAL:
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return OVSP_LOCAL;
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case OFPP_NONE:
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return OVSP_NONE;
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default:
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return ofp_port;
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}
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}
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static inline uint16_t
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odp_port_to_ofp_port(uint16_t odp_port)
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{
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switch (odp_port) {
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case OVSP_LOCAL:
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return OFPP_LOCAL;
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case OVSP_NONE:
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return OFPP_NONE;
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default:
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return odp_port;
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}
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}
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void format_odp_actions(struct ds *, const struct nlattr *odp_actions,
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size_t actions_len);
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/* Upper bound on the length of a nlattr-formatted flow key. The longest
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* nlattr-formatted flow key would be:
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*
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* struct pad nl hdr total
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* ------ --- ------ -----
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* OVS_KEY_ATTR_PRIORITY 4 -- 4 8
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* OVS_KEY_ATTR_TUN_ID 8 -- 4 12
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* OVS_KEY_ATTR_IN_PORT 4 -- 4 8
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* OVS_KEY_ATTR_ETHERNET 12 -- 4 16
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* OVS_KEY_ATTR_8021Q 4 -- 4 8
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* OVS_KEY_ATTR_ETHERTYPE 2 2 4 8
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* OVS_KEY_ATTR_IPV6 40 -- 4 44
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* OVS_KEY_ATTR_ICMPV6 2 2 4 8
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* OVS_KEY_ATTR_ND 28 -- 4 32
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* -------------------------------------------------
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* total 144
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*/
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#define ODPUTIL_FLOW_KEY_BYTES 144
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/* A buffer with sufficient size and alignment to hold an nlattr-formatted flow
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* key. An array of "struct nlattr" might not, in theory, be sufficiently
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* aligned because it only contains 16-bit types. */
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struct odputil_keybuf {
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uint32_t keybuf[DIV_ROUND_UP(ODPUTIL_FLOW_KEY_BYTES, 4)];
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};
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void odp_flow_key_format(const struct nlattr *, size_t, struct ds *);
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int odp_flow_key_from_string(const char *s, struct ofpbuf *);
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void odp_flow_key_from_flow(struct ofpbuf *, const struct flow *);
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int odp_flow_key_to_flow(const struct nlattr *, size_t, struct flow *);
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enum user_action_cookie_type {
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USER_ACTION_COOKIE_UNSPEC,
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USER_ACTION_COOKIE_CONTROLLER, /* Packet for controller. */
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USER_ACTION_COOKIE_SFLOW, /* Packet for sFlow sampling. */
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};
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/* user_action_cookie is passed as argument to OVS_ACTION_ATTR_USERSPACE.
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* Since is it passed to kernel as u64, its size has to be 8 bytes. */
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struct user_action_cookie {
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uint8_t type; /* enum user_action_cookie_type. */
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uint8_t n_output; /* No of output ports. used by sflow. */
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ovs_be16 vlan_tci; /* Used by sFlow */
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uint32_t data; /* Data is len for OFPP_CONTROLLER action.
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For sFlow it is port_ifindex. */
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};
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BUILD_ASSERT_DECL(sizeof(struct user_action_cookie) == 8);
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#endif /* odp-util.h */
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