519 lines
14 KiB
C
519 lines
14 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 6WIND S.A. 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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#include <stdint.h>
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#include <rte_mbuf.h>
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#include <rte_mbuf_ptype.h>
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#include <rte_byteorder.h>
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#include <rte_ether.h>
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#include <rte_ip.h>
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#include <rte_tcp.h>
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#include <rte_udp.h>
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#include <rte_sctp.h>
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#include <rte_gre.h>
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#include <rte_net.h>
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/* get l3 packet type from ip6 next protocol */
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static uint32_t
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ptype_l3_ip6(uint8_t ip6_proto)
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{
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static const uint32_t ip6_ext_proto_map[256] = {
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[IPPROTO_HOPOPTS] = RTE_PTYPE_L3_IPV6_EXT - RTE_PTYPE_L3_IPV6,
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[IPPROTO_ROUTING] = RTE_PTYPE_L3_IPV6_EXT - RTE_PTYPE_L3_IPV6,
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[IPPROTO_FRAGMENT] = RTE_PTYPE_L3_IPV6_EXT - RTE_PTYPE_L3_IPV6,
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[IPPROTO_ESP] = RTE_PTYPE_L3_IPV6_EXT - RTE_PTYPE_L3_IPV6,
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[IPPROTO_AH] = RTE_PTYPE_L3_IPV6_EXT - RTE_PTYPE_L3_IPV6,
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[IPPROTO_DSTOPTS] = RTE_PTYPE_L3_IPV6_EXT - RTE_PTYPE_L3_IPV6,
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};
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return RTE_PTYPE_L3_IPV6 + ip6_ext_proto_map[ip6_proto];
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}
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/* get l3 packet type from ip version and header length */
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static uint32_t
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ptype_l3_ip(uint8_t ipv_ihl)
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{
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static const uint32_t ptype_l3_ip_proto_map[256] = {
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[0x45] = RTE_PTYPE_L3_IPV4,
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[0x46] = RTE_PTYPE_L3_IPV4_EXT,
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[0x47] = RTE_PTYPE_L3_IPV4_EXT,
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[0x48] = RTE_PTYPE_L3_IPV4_EXT,
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[0x49] = RTE_PTYPE_L3_IPV4_EXT,
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[0x4A] = RTE_PTYPE_L3_IPV4_EXT,
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[0x4B] = RTE_PTYPE_L3_IPV4_EXT,
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[0x4C] = RTE_PTYPE_L3_IPV4_EXT,
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[0x4D] = RTE_PTYPE_L3_IPV4_EXT,
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[0x4E] = RTE_PTYPE_L3_IPV4_EXT,
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[0x4F] = RTE_PTYPE_L3_IPV4_EXT,
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};
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return ptype_l3_ip_proto_map[ipv_ihl];
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}
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/* get l4 packet type from proto */
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static uint32_t
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ptype_l4(uint8_t proto)
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{
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static const uint32_t ptype_l4_proto[256] = {
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[IPPROTO_UDP] = RTE_PTYPE_L4_UDP,
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[IPPROTO_TCP] = RTE_PTYPE_L4_TCP,
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[IPPROTO_SCTP] = RTE_PTYPE_L4_SCTP,
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};
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return ptype_l4_proto[proto];
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}
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/* get inner l3 packet type from ip6 next protocol */
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static uint32_t
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ptype_inner_l3_ip6(uint8_t ip6_proto)
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{
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static const uint32_t ptype_inner_ip6_ext_proto_map[256] = {
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[IPPROTO_HOPOPTS] = RTE_PTYPE_INNER_L3_IPV6_EXT -
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RTE_PTYPE_INNER_L3_IPV6,
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[IPPROTO_ROUTING] = RTE_PTYPE_INNER_L3_IPV6_EXT -
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RTE_PTYPE_INNER_L3_IPV6,
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[IPPROTO_FRAGMENT] = RTE_PTYPE_INNER_L3_IPV6_EXT -
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RTE_PTYPE_INNER_L3_IPV6,
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[IPPROTO_ESP] = RTE_PTYPE_INNER_L3_IPV6_EXT -
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RTE_PTYPE_INNER_L3_IPV6,
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[IPPROTO_AH] = RTE_PTYPE_INNER_L3_IPV6_EXT -
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RTE_PTYPE_INNER_L3_IPV6,
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[IPPROTO_DSTOPTS] = RTE_PTYPE_INNER_L3_IPV6_EXT -
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RTE_PTYPE_INNER_L3_IPV6,
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};
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return RTE_PTYPE_INNER_L3_IPV6 +
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ptype_inner_ip6_ext_proto_map[ip6_proto];
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}
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/* get inner l3 packet type from ip version and header length */
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static uint32_t
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ptype_inner_l3_ip(uint8_t ipv_ihl)
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{
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static const uint32_t ptype_inner_l3_ip_proto_map[256] = {
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[0x45] = RTE_PTYPE_INNER_L3_IPV4,
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[0x46] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x47] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x48] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x49] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x4A] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x4B] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x4C] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x4D] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x4E] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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[0x4F] = RTE_PTYPE_INNER_L3_IPV4_EXT,
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};
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return ptype_inner_l3_ip_proto_map[ipv_ihl];
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}
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/* get inner l4 packet type from proto */
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static uint32_t
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ptype_inner_l4(uint8_t proto)
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{
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static const uint32_t ptype_inner_l4_proto[256] = {
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[IPPROTO_UDP] = RTE_PTYPE_INNER_L4_UDP,
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[IPPROTO_TCP] = RTE_PTYPE_INNER_L4_TCP,
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[IPPROTO_SCTP] = RTE_PTYPE_INNER_L4_SCTP,
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};
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return ptype_inner_l4_proto[proto];
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}
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/* get the tunnel packet type if any, update proto and off. */
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static uint32_t
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ptype_tunnel(uint16_t *proto, const struct rte_mbuf *m,
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uint32_t *off)
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{
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switch (*proto) {
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case IPPROTO_GRE: {
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static const uint8_t opt_len[16] = {
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[0x0] = 4,
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[0x1] = 8,
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[0x2] = 8,
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[0x8] = 8,
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[0x3] = 12,
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[0x9] = 12,
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[0xa] = 12,
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[0xb] = 16,
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};
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const struct gre_hdr *gh;
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struct gre_hdr gh_copy;
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uint16_t flags;
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gh = rte_pktmbuf_read(m, *off, sizeof(*gh), &gh_copy);
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if (unlikely(gh == NULL))
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return 0;
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flags = rte_be_to_cpu_16(*(const uint16_t *)gh);
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flags >>= 12;
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if (opt_len[flags] == 0)
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return 0;
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*off += opt_len[flags];
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*proto = gh->proto;
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if (*proto == rte_cpu_to_be_16(ETHER_TYPE_TEB))
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return RTE_PTYPE_TUNNEL_NVGRE;
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else
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return RTE_PTYPE_TUNNEL_GRE;
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}
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case IPPROTO_IPIP:
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*proto = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
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return RTE_PTYPE_TUNNEL_IP;
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case IPPROTO_IPV6:
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*proto = rte_cpu_to_be_16(ETHER_TYPE_IPv6);
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return RTE_PTYPE_TUNNEL_IP; /* IP is also valid for IPv6 */
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default:
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return 0;
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}
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}
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/* get the ipv4 header length */
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static uint8_t
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ip4_hlen(const struct ipv4_hdr *hdr)
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{
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return (hdr->version_ihl & 0xf) * 4;
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}
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/* parse ipv6 extended headers, update offset and return next proto */
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static uint16_t
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skip_ip6_ext(uint16_t proto, const struct rte_mbuf *m, uint32_t *off,
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int *frag)
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{
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struct ext_hdr {
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uint8_t next_hdr;
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uint8_t len;
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};
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const struct ext_hdr *xh;
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struct ext_hdr xh_copy;
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unsigned int i;
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*frag = 0;
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#define MAX_EXT_HDRS 5
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for (i = 0; i < MAX_EXT_HDRS; i++) {
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switch (proto) {
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case IPPROTO_HOPOPTS:
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case IPPROTO_ROUTING:
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case IPPROTO_DSTOPTS:
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xh = rte_pktmbuf_read(m, *off, sizeof(*xh),
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&xh_copy);
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if (xh == NULL)
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return 0;
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*off += (xh->len + 1) * 8;
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proto = xh->next_hdr;
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break;
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case IPPROTO_FRAGMENT:
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xh = rte_pktmbuf_read(m, *off, sizeof(*xh),
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&xh_copy);
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if (xh == NULL)
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return 0;
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*off += 8;
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proto = xh->next_hdr;
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*frag = 1;
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return proto; /* this is always the last ext hdr */
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case IPPROTO_NONE:
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return 0;
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default:
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return proto;
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}
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}
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return 0;
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}
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/* parse mbuf data to get packet type */
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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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{
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struct rte_net_hdr_lens local_hdr_lens;
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const struct ether_hdr *eh;
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struct ether_hdr eh_copy;
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uint32_t pkt_type = RTE_PTYPE_L2_ETHER;
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uint32_t off = 0;
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uint16_t proto;
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if (hdr_lens == NULL)
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hdr_lens = &local_hdr_lens;
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eh = rte_pktmbuf_read(m, off, sizeof(*eh), &eh_copy);
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if (unlikely(eh == NULL))
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return 0;
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proto = eh->ether_type;
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off = sizeof(*eh);
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hdr_lens->l2_len = off;
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if ((layers & RTE_PTYPE_L2_MASK) == 0)
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return 0;
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if (proto == rte_cpu_to_be_16(ETHER_TYPE_IPv4))
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goto l3; /* fast path if packet is IPv4 */
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if (proto == rte_cpu_to_be_16(ETHER_TYPE_VLAN)) {
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const struct vlan_hdr *vh;
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struct vlan_hdr vh_copy;
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pkt_type = RTE_PTYPE_L2_ETHER_VLAN;
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vh = rte_pktmbuf_read(m, off, sizeof(*vh), &vh_copy);
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if (unlikely(vh == NULL))
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return pkt_type;
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off += sizeof(*vh);
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hdr_lens->l2_len += sizeof(*vh);
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proto = vh->eth_proto;
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} else if (proto == rte_cpu_to_be_16(ETHER_TYPE_QINQ)) {
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const struct vlan_hdr *vh;
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struct vlan_hdr vh_copy;
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pkt_type = RTE_PTYPE_L2_ETHER_QINQ;
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vh = rte_pktmbuf_read(m, off + sizeof(*vh), sizeof(*vh),
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&vh_copy);
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if (unlikely(vh == NULL))
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return pkt_type;
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off += 2 * sizeof(*vh);
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hdr_lens->l2_len += 2 * sizeof(*vh);
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proto = vh->eth_proto;
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}
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l3:
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if ((layers & RTE_PTYPE_L3_MASK) == 0)
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return pkt_type;
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if (proto == rte_cpu_to_be_16(ETHER_TYPE_IPv4)) {
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const struct ipv4_hdr *ip4h;
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struct ipv4_hdr ip4h_copy;
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ip4h = rte_pktmbuf_read(m, off, sizeof(*ip4h), &ip4h_copy);
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if (unlikely(ip4h == NULL))
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return pkt_type;
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pkt_type |= ptype_l3_ip(ip4h->version_ihl);
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hdr_lens->l3_len = ip4_hlen(ip4h);
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off += hdr_lens->l3_len;
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if ((layers & RTE_PTYPE_L4_MASK) == 0)
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return pkt_type;
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if (ip4h->fragment_offset & rte_cpu_to_be_16(
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IPV4_HDR_OFFSET_MASK | IPV4_HDR_MF_FLAG)) {
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pkt_type |= RTE_PTYPE_L4_FRAG;
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hdr_lens->l4_len = 0;
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return pkt_type;
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}
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proto = ip4h->next_proto_id;
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pkt_type |= ptype_l4(proto);
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} else if (proto == rte_cpu_to_be_16(ETHER_TYPE_IPv6)) {
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const struct ipv6_hdr *ip6h;
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struct ipv6_hdr ip6h_copy;
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int frag = 0;
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ip6h = rte_pktmbuf_read(m, off, sizeof(*ip6h), &ip6h_copy);
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if (unlikely(ip6h == NULL))
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return pkt_type;
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proto = ip6h->proto;
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hdr_lens->l3_len = sizeof(*ip6h);
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off += hdr_lens->l3_len;
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pkt_type |= ptype_l3_ip6(proto);
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if ((pkt_type & RTE_PTYPE_L3_MASK) == RTE_PTYPE_L3_IPV6_EXT) {
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proto = skip_ip6_ext(proto, m, &off, &frag);
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hdr_lens->l3_len = off - hdr_lens->l2_len;
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}
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if (proto == 0)
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return pkt_type;
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if ((layers & RTE_PTYPE_L4_MASK) == 0)
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return pkt_type;
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if (frag) {
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pkt_type |= RTE_PTYPE_L4_FRAG;
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hdr_lens->l4_len = 0;
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return pkt_type;
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}
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pkt_type |= ptype_l4(proto);
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}
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if ((pkt_type & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_UDP) {
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hdr_lens->l4_len = sizeof(struct udp_hdr);
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return pkt_type;
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} else if ((pkt_type & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_TCP) {
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const struct tcp_hdr *th;
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struct tcp_hdr th_copy;
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th = rte_pktmbuf_read(m, off, sizeof(*th), &th_copy);
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if (unlikely(th == NULL))
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return pkt_type & (RTE_PTYPE_L2_MASK |
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RTE_PTYPE_L3_MASK);
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hdr_lens->l4_len = (th->data_off & 0xf0) >> 2;
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return pkt_type;
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} else if ((pkt_type & RTE_PTYPE_L4_MASK) == RTE_PTYPE_L4_SCTP) {
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hdr_lens->l4_len = sizeof(struct sctp_hdr);
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return pkt_type;
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} else {
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uint32_t prev_off = off;
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hdr_lens->l4_len = 0;
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if ((layers & RTE_PTYPE_TUNNEL_MASK) == 0)
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return pkt_type;
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pkt_type |= ptype_tunnel(&proto, m, &off);
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hdr_lens->tunnel_len = off - prev_off;
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}
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/* same job for inner header: we need to duplicate the code
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* because the packet types do not have the same value.
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*/
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if ((layers & RTE_PTYPE_INNER_L2_MASK) == 0)
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return pkt_type;
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hdr_lens->inner_l2_len = 0;
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if (proto == rte_cpu_to_be_16(ETHER_TYPE_TEB)) {
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eh = rte_pktmbuf_read(m, off, sizeof(*eh), &eh_copy);
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if (unlikely(eh == NULL))
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return pkt_type;
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pkt_type |= RTE_PTYPE_INNER_L2_ETHER;
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proto = eh->ether_type;
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off += sizeof(*eh);
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hdr_lens->inner_l2_len = sizeof(*eh);
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}
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if (proto == rte_cpu_to_be_16(ETHER_TYPE_VLAN)) {
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const struct vlan_hdr *vh;
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struct vlan_hdr vh_copy;
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pkt_type &= ~RTE_PTYPE_INNER_L2_MASK;
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pkt_type |= RTE_PTYPE_INNER_L2_ETHER_VLAN;
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vh = rte_pktmbuf_read(m, off, sizeof(*vh), &vh_copy);
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if (unlikely(vh == NULL))
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return pkt_type;
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off += sizeof(*vh);
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hdr_lens->inner_l2_len += sizeof(*vh);
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proto = vh->eth_proto;
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} else if (proto == rte_cpu_to_be_16(ETHER_TYPE_QINQ)) {
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const struct vlan_hdr *vh;
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struct vlan_hdr vh_copy;
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pkt_type &= ~RTE_PTYPE_INNER_L2_MASK;
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pkt_type |= RTE_PTYPE_INNER_L2_ETHER_QINQ;
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vh = rte_pktmbuf_read(m, off + sizeof(*vh), sizeof(*vh),
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&vh_copy);
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if (unlikely(vh == NULL))
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return pkt_type;
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off += 2 * sizeof(*vh);
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hdr_lens->inner_l2_len += 2 * sizeof(*vh);
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proto = vh->eth_proto;
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}
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if ((layers & RTE_PTYPE_INNER_L3_MASK) == 0)
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return pkt_type;
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|
|
|
if (proto == rte_cpu_to_be_16(ETHER_TYPE_IPv4)) {
|
|
const struct ipv4_hdr *ip4h;
|
|
struct ipv4_hdr ip4h_copy;
|
|
|
|
ip4h = rte_pktmbuf_read(m, off, sizeof(*ip4h), &ip4h_copy);
|
|
if (unlikely(ip4h == NULL))
|
|
return pkt_type;
|
|
|
|
pkt_type |= ptype_inner_l3_ip(ip4h->version_ihl);
|
|
hdr_lens->inner_l3_len = ip4_hlen(ip4h);
|
|
off += hdr_lens->inner_l3_len;
|
|
|
|
if ((layers & RTE_PTYPE_INNER_L4_MASK) == 0)
|
|
return pkt_type;
|
|
if (ip4h->fragment_offset &
|
|
rte_cpu_to_be_16(IPV4_HDR_OFFSET_MASK |
|
|
IPV4_HDR_MF_FLAG)) {
|
|
pkt_type |= RTE_PTYPE_INNER_L4_FRAG;
|
|
hdr_lens->inner_l4_len = 0;
|
|
return pkt_type;
|
|
}
|
|
proto = ip4h->next_proto_id;
|
|
pkt_type |= ptype_inner_l4(proto);
|
|
} else if (proto == rte_cpu_to_be_16(ETHER_TYPE_IPv6)) {
|
|
const struct ipv6_hdr *ip6h;
|
|
struct ipv6_hdr ip6h_copy;
|
|
int frag = 0;
|
|
|
|
ip6h = rte_pktmbuf_read(m, off, sizeof(*ip6h), &ip6h_copy);
|
|
if (unlikely(ip6h == NULL))
|
|
return pkt_type;
|
|
|
|
proto = ip6h->proto;
|
|
hdr_lens->inner_l3_len = sizeof(*ip6h);
|
|
off += hdr_lens->inner_l3_len;
|
|
pkt_type |= ptype_inner_l3_ip6(proto);
|
|
if ((pkt_type & RTE_PTYPE_INNER_L3_MASK) ==
|
|
RTE_PTYPE_INNER_L3_IPV6_EXT) {
|
|
uint32_t prev_off;
|
|
|
|
prev_off = off;
|
|
proto = skip_ip6_ext(proto, m, &off, &frag);
|
|
hdr_lens->inner_l3_len += off - prev_off;
|
|
}
|
|
if (proto == 0)
|
|
return pkt_type;
|
|
|
|
if ((layers & RTE_PTYPE_INNER_L4_MASK) == 0)
|
|
return pkt_type;
|
|
|
|
if (frag) {
|
|
pkt_type |= RTE_PTYPE_INNER_L4_FRAG;
|
|
hdr_lens->inner_l4_len = 0;
|
|
return pkt_type;
|
|
}
|
|
pkt_type |= ptype_inner_l4(proto);
|
|
}
|
|
|
|
if ((pkt_type & RTE_PTYPE_INNER_L4_MASK) == RTE_PTYPE_INNER_L4_UDP) {
|
|
hdr_lens->inner_l4_len = sizeof(struct udp_hdr);
|
|
} else if ((pkt_type & RTE_PTYPE_INNER_L4_MASK) ==
|
|
RTE_PTYPE_INNER_L4_TCP) {
|
|
const struct tcp_hdr *th;
|
|
struct tcp_hdr th_copy;
|
|
|
|
th = rte_pktmbuf_read(m, off, sizeof(*th), &th_copy);
|
|
if (unlikely(th == NULL))
|
|
return pkt_type & (RTE_PTYPE_INNER_L2_MASK |
|
|
RTE_PTYPE_INNER_L3_MASK);
|
|
hdr_lens->inner_l4_len = (th->data_off & 0xf0) >> 2;
|
|
} else if ((pkt_type & RTE_PTYPE_INNER_L4_MASK) ==
|
|
RTE_PTYPE_INNER_L4_SCTP) {
|
|
hdr_lens->inner_l4_len = sizeof(struct sctp_hdr);
|
|
} else {
|
|
hdr_lens->inner_l4_len = 0;
|
|
}
|
|
|
|
return pkt_type;
|
|
}
|