873dd1e68d
Add a parameter to rte_net_get_ptype() to select which layers should be parsed. This avoids to parse all layers if only the first ones are required. Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright 2016 6WIND S.A.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _RTE_NET_PTYPE_H_
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#define _RTE_NET_PTYPE_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* Structure containing header lengths associated to a packet, filled
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* by rte_net_get_ptype().
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*/
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struct rte_net_hdr_lens {
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uint8_t l2_len;
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uint8_t l3_len;
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uint8_t l4_len;
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uint8_t tunnel_len;
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uint8_t inner_l2_len;
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uint8_t inner_l3_len;
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uint8_t inner_l4_len;
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};
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/**
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* Parse an Ethernet packet to get its packet type.
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*
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* This function parses the network headers in mbuf data and return its
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* packet type.
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*
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* If it is provided by the user, it also fills a rte_net_hdr_lens
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* structure that contains the lengths of the parsed network
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* headers. Each length field is valid only if the associated packet
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* type is set. For instance, hdr_lens->l2_len is valid only if
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* (retval & RTE_PTYPE_L2_MASK) != RTE_PTYPE_UNKNOWN.
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*
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* Supported packet types are:
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* L2: Ether, Vlan, QinQ
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* L3: IPv4, IPv6
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* L4: TCP, UDP, SCTP
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* Tunnels: IPv4, IPv6, Gre, Nvgre
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*
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* @param m
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* The packet mbuf to be parsed.
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* @param hdr_lens
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* A pointer to a structure where the header lengths will be returned,
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* or NULL.
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* @param layers
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* List of layers to parse. The function will stop at the first
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* empty layer. Examples:
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* - To parse all known layers, use RTE_PTYPE_ALL_MASK.
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* - To parse only L2 and L3, use RTE_PTYPE_L2_MASK | RTE_PTYPE_L3_MASK
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* @return
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* The packet type of the packet.
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*/
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uint32_t rte_net_get_ptype(const struct rte_mbuf *m,
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struct rte_net_hdr_lens *hdr_lens, uint32_t layers);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_NET_PTYPE_H_ */
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