#include <vnet/vnet.h>
#include <vnet/gre/gre.h>
#include <vnet/adj/adj_midchain.h>
+#include <vnet/tunnel/tunnel_dp.h>
extern gre_main_t gre_main;
vnet_link_t link_type, const void *dst_address)
{
gre_main_t *gm = &gre_main;
+ const ip46_address_t *dst;
ip4_and_gre_header_t *h4;
ip6_and_gre_header_t *h6;
gre_header_t *gre;
u32 ti;
u8 is_ipv6;
+ dst = dst_address;
ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
if (~0 == ti)
h4->ip4.protocol = IP_PROTOCOL_GRE;
/* fixup ip4 header length and checksum after-the-fact */
h4->ip4.src_address.as_u32 = t->tunnel_src.ip4.as_u32;
- h4->ip4.dst_address.as_u32 = t->tunnel_dst.fp_addr.ip4.as_u32;
+ h4->ip4.dst_address.as_u32 = dst->ip4.as_u32;
h4->ip4.checksum = ip4_header_checksum (&h4->ip4);
}
else
/* fixup ip6 header length and checksum after-the-fact */
h6->ip6.src_address.as_u64[0] = t->tunnel_src.ip6.as_u64[0];
h6->ip6.src_address.as_u64[1] = t->tunnel_src.ip6.as_u64[1];
- h6->ip6.dst_address.as_u64[0] = t->tunnel_dst.fp_addr.ip6.as_u64[0];
- h6->ip6.dst_address.as_u64[1] = t->tunnel_dst.fp_addr.ip6.as_u64[1];
+ h6->ip6.dst_address.as_u64[0] = dst->ip6.as_u64[0];
+ h6->ip6.dst_address.as_u64[1] = dst->ip6.as_u64[1];
}
if (PREDICT_FALSE (t->type == GRE_TUNNEL_TYPE_ERSPAN))
return (rewrite);
}
-#define is_v4_packet(_h) ((*(u8*) _h) & 0xF0) == 0x40
+static void
+gre44_fixup (vlib_main_t * vm,
+ const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+{
+ tunnel_encap_decap_flags_t flags;
+ ip4_and_gre_header_t *ip0;
+
+ ip0 = vlib_buffer_get_current (b0);
+ flags = pointer_to_uword (data);
+
+ /* Fixup the checksum and len fields in the GRE tunnel encap
+ * that was applied at the midchain node */
+ ip0->ip4.length =
+ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+ tunnel_encap_fixup_4o4 (flags, (ip4_header_t *) (ip0 + 1), &ip0->ip4);
+ ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4);
+}
+
+static void
+gre64_fixup (vlib_main_t * vm,
+ const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+{
+ tunnel_encap_decap_flags_t flags;
+ ip4_and_gre_header_t *ip0;
+
+ ip0 = vlib_buffer_get_current (b0);
+ flags = pointer_to_uword (data);
+
+ /* Fixup the checksum and len fields in the GRE tunnel encap
+ * that was applied at the midchain node */
+ ip0->ip4.length =
+ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0));
+ tunnel_encap_fixup_6o4 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip4);
+ ip0->ip4.checksum = ip4_header_checksum (&ip0->ip4);
+}
static void
-gre4_fixup (vlib_main_t * vm,
- const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+grex4_fixup (vlib_main_t * vm,
+ const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
{
ip4_header_t *ip0;
}
static void
-gre6_fixup (vlib_main_t * vm,
- const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+gre46_fixup (vlib_main_t * vm,
+ const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+{
+ tunnel_encap_decap_flags_t flags;
+ ip6_and_gre_header_t *ip0;
+
+ ip0 = vlib_buffer_get_current (b0);
+ flags = pointer_to_uword (data);
+
+ /* Fixup the payload length field in the GRE tunnel encap that was applied
+ * at the midchain node */
+ ip0->ip6.payload_length =
+ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
+ sizeof (*ip0));
+ tunnel_encap_fixup_4o6 (flags, (ip4_header_t *) (ip0 + 1), &ip0->ip6);
+}
+
+static void
+gre66_fixup (vlib_main_t * vm,
+ const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
+{
+ tunnel_encap_decap_flags_t flags;
+ ip6_and_gre_header_t *ip0;
+
+ ip0 = vlib_buffer_get_current (b0);
+ flags = pointer_to_uword (data);
+
+ /* Fixup the payload length field in the GRE tunnel encap that was applied
+ * at the midchain node */
+ ip0->ip6.payload_length =
+ clib_host_to_net_u16 (vlib_buffer_length_in_chain (vm, b0) -
+ sizeof (*ip0));
+ tunnel_encap_fixup_6o6 (flags, (ip6_header_t *) (ip0 + 1), &ip0->ip6);
+}
+
+static void
+grex6_fixup (vlib_main_t * vm,
+ const ip_adjacency_t * adj, vlib_buffer_t * b0, const void *data)
{
ip6_header_t *ip0;
sizeof (*ip0));
}
+/**
+ * return the appropriate fixup function given the overlay (link-type) and
+ * underlay (fproto) combination
+ */
+static adj_midchain_fixup_t
+gre_get_fixup (fib_protocol_t fproto, vnet_link_t lt)
+{
+ if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP6)
+ return (gre66_fixup);
+ if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_IP4)
+ return (gre46_fixup);
+ if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP6)
+ return (gre64_fixup);
+ if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_IP4)
+ return (gre44_fixup);
+ if (fproto == FIB_PROTOCOL_IP6 && lt == VNET_LINK_ETHERNET)
+ return (grex6_fixup);
+ if (fproto == FIB_PROTOCOL_IP4 && lt == VNET_LINK_ETHERNET)
+ return (grex4_fixup);
+
+ ASSERT (0);
+ return (gre44_fixup);
+}
+
void
gre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
{
gre_main_t *gm = &gre_main;
gre_tunnel_t *t;
adj_flags_t af;
- u8 is_ipv6;
u32 ti;
ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
t = pool_elt_at_index (gm->tunnels, ti);
- is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0;
af = ADJ_FLAG_MIDCHAIN_IP_STACK;
if (VNET_LINK_ETHERNET == adj_get_link_type (ai))
af |= ADJ_FLAG_MIDCHAIN_NO_COUNT;
adj_nbr_midchain_update_rewrite
- (ai, !is_ipv6 ? gre4_fixup : gre6_fixup, NULL, af,
- gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai), NULL));
+ (ai, gre_get_fixup (t->tunnel_dst.fp_proto,
+ adj_get_link_type (ai)),
+ uword_to_pointer (t->flags, void *), af,
+ gre_build_rewrite (vnm, sw_if_index, adj_get_link_type (ai),
+ &t->tunnel_dst.fp_addr));
gre_tunnel_stack (ai);
}
+
+adj_walk_rc_t
+mgre_mk_complete_walk (adj_index_t ai, void *data)
+{
+ mgre_walk_ctx_t *ctx = data;
+
+ adj_nbr_midchain_update_rewrite
+ (ai, gre_get_fixup (ctx->t->tunnel_dst.fp_proto,
+ adj_get_link_type (ai)),
+ uword_to_pointer (ctx->t->flags, void *),
+ ADJ_FLAG_MIDCHAIN_IP_STACK,
+ gre_build_rewrite (vnet_get_main (),
+ ctx->t->sw_if_index,
+ adj_get_link_type (ai),
+ &nhrp_entry_get_nh (ctx->ne)->fp_addr));
+
+ nhrp_entry_adj_stack (ctx->ne, ai);
+
+ return (ADJ_WALK_RC_CONTINUE);
+}
+
+adj_walk_rc_t
+mgre_mk_incomplete_walk (adj_index_t ai, void *data)
+{
+ gre_tunnel_t *t = data;
+
+ adj_nbr_midchain_update_rewrite (ai, gre_get_fixup (t->tunnel_dst.fp_proto,
+ adj_get_link_type (ai)),
+ NULL, ADJ_FLAG_NONE, NULL);
+
+ adj_midchain_delegate_unstack (ai);
+
+ return (ADJ_WALK_RC_CONTINUE);
+}
+
+void
+mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai)
+{
+ gre_main_t *gm = &gre_main;
+ ip_adjacency_t *adj;
+ nhrp_entry_t *ne;
+ gre_tunnel_t *t;
+ u32 ti;
+
+ adj = adj_get (ai);
+ ti = gm->tunnel_index_by_sw_if_index[sw_if_index];
+ t = pool_elt_at_index (gm->tunnels, ti);
+
+ ne = nhrp_entry_find (sw_if_index, &adj->sub_type.nbr.next_hop);
+
+ if (NULL == ne)
+ // no NHRP entry to provide the next-hop
+ return;
+
+ mgre_walk_ctx_t ctx = {
+ .t = t,
+ .ne = ne
+ };
+ adj_nbr_walk_nh (sw_if_index,
+ adj->ia_nh_proto,
+ &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, &ctx);
+}
#endif /* CLIB_MARCH_VARIANT */
typedef enum
.update_adjacency = gre_update_adj,
.flags = VNET_HW_INTERFACE_CLASS_FLAG_P2P,
};
+
+VNET_HW_INTERFACE_CLASS (mgre_hw_interface_class) = {
+ .name = "mGRE",
+ .format_header = format_gre_header_with_length,
+ .unformat_header = unformat_gre_header,
+ .build_rewrite = gre_build_rewrite,
+ .update_adjacency = mgre_update_adj,
+ .flags = VNET_HW_INTERFACE_CLASS_FLAG_NBMA,
+};
/* *INDENT-ON* */
#endif /* CLIB_MARCH_VARIANT */
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