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-rw-r--r--src/vnet/gso/hdr_offset_parser.h408
1 files changed, 408 insertions, 0 deletions
diff --git a/src/vnet/gso/hdr_offset_parser.h b/src/vnet/gso/hdr_offset_parser.h
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index 00000000000..8f9e0cda984
--- /dev/null
+++ b/src/vnet/gso/hdr_offset_parser.h
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+/*
+ * Copyright (c) 2019 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef included_hdr_offset_parser_h
+#define included_hdr_offset_parser_h
+
+#include <vnet/ethernet/ethernet.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/ip/ip6_packet.h>
+#include <vnet/udp/udp.h>
+#include <vnet/udp/udp_packet.h>
+#include <vnet/vnet.h>
+#include <vnet/vxlan/vxlan_packet.h>
+
+#define foreach_gho_flag \
+ _( 0, IP4) \
+ _( 1, IP6) \
+ _( 2, TCP) \
+ _( 3, UDP) \
+ _( 4, OUTER_IP4) \
+ _( 5, OUTER_IP6) \
+ _( 6, OUTER_TCP) \
+ _( 7, OUTER_UDP) \
+ _( 8, VXLAN_TUNNEL) \
+ _( 9, GRE_TUNNEL) \
+ _( 10, IPIP_TUNNEL) \
+ _( 11, GENEVE_TUNNEL)
+
+typedef enum gho_flag_t_
+{
+#define _(bit, name) GHO_F_##name = (1 << bit),
+ foreach_gho_flag
+#undef _
+} gho_flag_t;
+
+#define GHO_F_TUNNEL (GHO_F_VXLAN_TUNNEL | \
+ GHO_F_GENEVE_TUNNEL | \
+ GHO_F_IPIP_TUNNEL | \
+ GHO_F_GRE_TUNNEL)
+
+#define GHO_F_OUTER_HDR (GHO_F_OUTER_IP4 | \
+ GHO_F_OUTER_IP6 | \
+ GHO_F_OUTER_TCP | \
+ GHO_F_OUTER_UDP)
+
+#define GHO_F_INNER_HDR (GHO_F_IP4 | \
+ GHO_F_IP6 | \
+ GHO_F_UDP | \
+ GHO_F_TCP)
+
+typedef struct
+{
+ i16 outer_l2_hdr_offset;
+ i16 outer_l3_hdr_offset;
+ i16 outer_l4_hdr_offset;
+ u16 outer_l4_hdr_sz;
+ u16 outer_hdr_sz;
+ i16 l2_hdr_offset;
+ i16 l3_hdr_offset;
+ i16 l4_hdr_offset;
+ u16 l4_hdr_sz;
+ u16 hdr_sz;
+ gho_flag_t gho_flags;
+} generic_header_offset_t;
+
+static_always_inline u8 *
+format_generic_header_offset (u8 * s, va_list * args)
+{
+ generic_header_offset_t *gho = va_arg (*args, generic_header_offset_t *);
+
+ s = format (s, "\n\t");
+ if (gho->gho_flags & GHO_F_TUNNEL)
+ {
+ if (gho->gho_flags & GHO_F_VXLAN_TUNNEL)
+ s = format (s, "vxlan-tunnel ");
+ else if (gho->gho_flags & GHO_F_IPIP_TUNNEL)
+ s = format (s, "ipip-tunnel ");
+ else if (gho->gho_flags & GHO_F_GRE_TUNNEL)
+ s = format (s, "gre-tunnel ");
+ else if (gho->gho_flags & GHO_F_GENEVE_TUNNEL)
+ s = format (s, "geneve-tunnel ");
+
+ if (gho->gho_flags & GHO_F_OUTER_IP4)
+ s = format (s, "outer-ipv4 ");
+ else if (gho->gho_flags & GHO_F_OUTER_IP6)
+ s = format (s, "outer-ipv6 ");
+
+ if (gho->gho_flags & GHO_F_OUTER_UDP)
+ s = format (s, "outer-udp ");
+ else if (gho->gho_flags & GHO_F_OUTER_TCP)
+ s = format (s, "outer-tcp ");
+
+ s = format (s, "outer-hdr-sz %u outer-l2-hdr-offset %d "
+ "outer-l3-hdr-offset %d outer-l4-hdr-offset %d "
+ "outer-l4-hdr-sz %u\n\t",
+ gho->outer_hdr_sz, gho->outer_l2_hdr_offset,
+ gho->outer_l3_hdr_offset, gho->outer_l4_hdr_offset,
+ gho->outer_l4_hdr_sz);
+ }
+
+ if (gho->gho_flags & GHO_F_IP4)
+ s = format (s, "ipv4 ");
+ else if (gho->gho_flags & GHO_F_IP6)
+ s = format (s, "ipv6 ");
+
+ if (gho->gho_flags & GHO_F_TCP)
+ s = format (s, "tcp ");
+ else if (gho->gho_flags & GHO_F_UDP)
+ s = format (s, "udp ");
+
+ s = format (s, "hdr-sz %u l2-hdr-offset %d "
+ "l3-hdr-offset %d l4-hdr-offset %d "
+ "l4-hdr-sz %u",
+ gho->hdr_sz, gho->l2_hdr_offset, gho->l3_hdr_offset,
+ gho->l4_hdr_offset, gho->l4_hdr_sz);
+
+ return s;
+}
+
+static_always_inline void
+vnet_get_inner_header (vlib_buffer_t * b0, generic_header_offset_t * gho)
+{
+ if ((gho->gho_flags & GHO_F_TUNNEL)
+ && (gho->gho_flags & GHO_F_OUTER_HDR)
+ && (b0->current_data == gho->outer_l2_hdr_offset))
+ vlib_buffer_advance (b0, gho->outer_hdr_sz);
+}
+
+static_always_inline void
+vnet_get_outer_header (vlib_buffer_t * b0, generic_header_offset_t * gho)
+{
+ if ((gho->gho_flags & GHO_F_TUNNEL)
+ && (gho->gho_flags & GHO_F_OUTER_HDR)
+ && (b0->current_data == gho->l2_hdr_offset))
+ vlib_buffer_advance (b0, -gho->outer_hdr_sz);
+}
+
+static_always_inline void
+vnet_geneve_inner_header_parser_inline (vlib_buffer_t * b0,
+ generic_header_offset_t * gho)
+{
+ /* not supported yet */
+ if ((gho->gho_flags & GHO_F_GENEVE_TUNNEL) == 0)
+ return;
+
+ ASSERT (0);
+}
+
+static_always_inline void
+vnet_gre_inner_header_parser_inline (vlib_buffer_t * b0,
+ generic_header_offset_t * gho)
+{
+ /* not supported yet */
+ if ((gho->gho_flags & GHO_F_GRE_TUNNEL) == 0)
+ return;
+
+ ASSERT (0);
+}
+
+static_always_inline void
+vnet_ipip_inner_header_parser_inline (vlib_buffer_t * b0,
+ generic_header_offset_t * gho)
+{
+ /* not supported yet */
+ if ((gho->gho_flags & GHO_F_IPIP_TUNNEL) == 0)
+ return;
+
+ ASSERT (0);
+}
+
+static_always_inline void
+vnet_vxlan_inner_header_parser_inline (vlib_buffer_t * b0,
+ generic_header_offset_t * gho)
+{
+ u8 l4_proto = 0;
+ u8 l4_hdr_sz = 0;
+
+ if ((gho->gho_flags & GHO_F_VXLAN_TUNNEL) == 0)
+ return;
+
+ gho->outer_l2_hdr_offset = gho->l2_hdr_offset;
+ gho->outer_l3_hdr_offset = gho->l3_hdr_offset;
+ gho->outer_l4_hdr_offset = gho->l4_hdr_offset;
+ gho->outer_l4_hdr_sz = gho->l4_hdr_sz;
+ gho->outer_hdr_sz = gho->hdr_sz;
+
+ gho->l2_hdr_offset = 0;
+ gho->l3_hdr_offset = 0;
+ gho->l4_hdr_offset = 0;
+ gho->l4_hdr_sz = 0;
+ gho->hdr_sz = 0;
+
+ if (gho->gho_flags & GHO_F_IP4)
+ {
+ gho->gho_flags |= GHO_F_OUTER_IP4;
+ }
+ else if (gho->gho_flags & GHO_F_IP6)
+ {
+ gho->gho_flags |= GHO_F_OUTER_IP6;
+ }
+
+ if (gho->gho_flags & GHO_F_UDP)
+ {
+ gho->gho_flags |= GHO_F_OUTER_UDP;
+ }
+
+ gho->gho_flags &= ~GHO_F_INNER_HDR;
+
+ vnet_get_inner_header (b0, gho);
+
+ gho->l2_hdr_offset = b0->current_data;
+
+ ethernet_header_t *eh = (ethernet_header_t *) vlib_buffer_get_current (b0);
+ u16 ethertype = clib_net_to_host_u16 (eh->type);
+ u16 l2hdr_sz = sizeof (ethernet_header_t);
+
+ if (ethernet_frame_is_tagged (ethertype))
+ {
+ ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eh + 1);
+
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ l2hdr_sz += sizeof (*vlan);
+ if (ethertype == ETHERNET_TYPE_VLAN)
+ {
+ vlan++;
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ l2hdr_sz += sizeof (*vlan);
+ }
+ }
+
+ gho->l3_hdr_offset = l2hdr_sz;
+
+ if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
+ {
+ ip4_header_t *ip4 =
+ (ip4_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
+ gho->l4_hdr_offset = gho->l3_hdr_offset + ip4_header_bytes (ip4);
+ l4_proto = ip4->protocol;
+ gho->gho_flags |= GHO_F_IP4;
+ }
+ else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
+ {
+ ip6_header_t *ip6 =
+ (ip6_header_t *) (vlib_buffer_get_current (b0) + gho->l3_hdr_offset);
+ /* FIXME IPv6 EH traversal */
+ gho->l4_hdr_offset = gho->l3_hdr_offset + sizeof (ip6_header_t);
+ l4_proto = ip6->protocol;
+ gho->gho_flags |= GHO_F_IP6;
+ }
+ if (l4_proto == IP_PROTOCOL_TCP)
+ {
+ tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b0) +
+ gho->l4_hdr_offset);
+ l4_hdr_sz = tcp_header_bytes (tcp);
+
+ gho->gho_flags |= GHO_F_TCP;
+
+ }
+ else if (l4_proto == IP_PROTOCOL_UDP)
+ {
+ udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b0) +
+ gho->l4_hdr_offset);
+ l4_hdr_sz = sizeof (*udp);
+
+ gho->gho_flags |= GHO_F_UDP;
+ }
+
+ gho->l4_hdr_sz = l4_hdr_sz;
+ gho->hdr_sz += gho->l4_hdr_offset + l4_hdr_sz;
+
+ vnet_get_outer_header (b0, gho);
+}
+
+static_always_inline void
+vnet_generic_inner_header_parser_inline (vlib_buffer_t * b0,
+ generic_header_offset_t * gho)
+{
+
+ if (gho->gho_flags & GHO_F_VXLAN_TUNNEL)
+ vnet_vxlan_inner_header_parser_inline (b0, gho);
+ else if (gho->gho_flags & GHO_F_IPIP_TUNNEL)
+ vnet_ipip_inner_header_parser_inline (b0, gho);
+ else if (gho->gho_flags & GHO_F_GRE_TUNNEL)
+ vnet_gre_inner_header_parser_inline (b0, gho);
+ else if (gho->gho_flags & GHO_F_GENEVE_TUNNEL)
+ vnet_geneve_inner_header_parser_inline (b0, gho);
+}
+
+static_always_inline void
+vnet_generic_outer_header_parser_inline (vlib_buffer_t * b0,
+ generic_header_offset_t * gho)
+{
+ u8 l4_proto = 0;
+ u8 l4_hdr_sz = 0;
+
+ ethernet_header_t *eh = (ethernet_header_t *) vlib_buffer_get_current (b0);
+ u16 ethertype = clib_net_to_host_u16 (eh->type);
+ u16 l2hdr_sz = sizeof (ethernet_header_t);
+
+ if (ethernet_frame_is_tagged (ethertype))
+ {
+ ethernet_vlan_header_t *vlan = (ethernet_vlan_header_t *) (eh + 1);
+
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ l2hdr_sz += sizeof (*vlan);
+ if (ethertype == ETHERNET_TYPE_VLAN)
+ {
+ vlan++;
+ ethertype = clib_net_to_host_u16 (vlan->type);
+ l2hdr_sz += sizeof (*vlan);
+ }
+ }
+
+ gho->l2_hdr_offset = b0->current_data;
+ gho->l3_hdr_offset = l2hdr_sz;
+
+ if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP4))
+ {
+ ip4_header_t *ip4 =
+ (ip4_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
+ gho->l4_hdr_offset = l2hdr_sz + ip4_header_bytes (ip4);
+ l4_proto = ip4->protocol;
+ gho->gho_flags |= GHO_F_IP4;
+ }
+ else if (PREDICT_TRUE (ethertype == ETHERNET_TYPE_IP6))
+ {
+ ip6_header_t *ip6 =
+ (ip6_header_t *) (vlib_buffer_get_current (b0) + l2hdr_sz);
+ /* FIXME IPv6 EH traversal */
+ gho->l4_hdr_offset = l2hdr_sz + sizeof (ip6_header_t);
+ l4_proto = ip6->protocol;
+ gho->gho_flags |= GHO_F_IP6;
+ }
+ if (l4_proto == IP_PROTOCOL_TCP)
+ {
+ tcp_header_t *tcp = (tcp_header_t *) (vlib_buffer_get_current (b0) +
+ gho->l4_hdr_offset);
+ l4_hdr_sz = tcp_header_bytes (tcp);
+
+ gho->gho_flags |= GHO_F_TCP;
+ }
+ else if (l4_proto == IP_PROTOCOL_UDP)
+ {
+ udp_header_t *udp = (udp_header_t *) (vlib_buffer_get_current (b0) +
+ gho->l4_hdr_offset);
+ l4_hdr_sz = sizeof (*udp);
+
+ gho->gho_flags |= GHO_F_UDP;
+
+ if (UDP_DST_PORT_vxlan == clib_net_to_host_u16 (udp->dst_port))
+ {
+ gho->gho_flags |= GHO_F_VXLAN_TUNNEL;
+ gho->hdr_sz += sizeof (vxlan_header_t);
+ }
+ else if (UDP_DST_PORT_geneve == clib_net_to_host_u16 (udp->dst_port))
+ {
+ gho->gho_flags |= GHO_F_GENEVE_TUNNEL;
+ }
+ }
+ else if ((l4_proto == IP_PROTOCOL_IP_IN_IP)
+ || (l4_proto == IP_PROTOCOL_IPV6))
+ {
+ l4_hdr_sz = 0;
+ gho->gho_flags |= GHO_F_IPIP_TUNNEL;
+ }
+ else if (l4_proto == IP_PROTOCOL_GRE)
+ {
+ l4_hdr_sz = 0;
+ gho->gho_flags |= GHO_F_GRE_TUNNEL;
+ }
+
+ gho->l4_hdr_sz = l4_hdr_sz;
+ gho->hdr_sz += gho->l4_hdr_offset + l4_hdr_sz;
+}
+
+static_always_inline void
+vnet_generic_header_offset_parser (vlib_buffer_t * b0,
+ generic_header_offset_t * gho)
+{
+ vnet_generic_outer_header_parser_inline (b0, gho);
+
+ if (gho->gho_flags & GHO_F_TUNNEL)
+ {
+ vnet_generic_inner_header_parser_inline (b0, gho);
+ }
+}
+
+#endif /* included_hdr_offset_parser_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */