X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fgre%2Fgre.c;h=f1bc6946416ba002dcb788866eae1c93d52fed52;hb=e5b94dded;hp=f06f19fab2a7d311dcf7bf23449c6c0ff26c8ed2;hpb=5f8f6173328f8d77feea5fd100e150c3094c11f0;p=vpp.git diff --git a/src/vnet/gre/gre.c b/src/vnet/gre/gre.c index f06f19fab2a..f1bc6946416 100644 --- a/src/vnet/gre/gre.c +++ b/src/vnet/gre/gre.c @@ -18,7 +18,7 @@ #include #include #include -#include +#include extern gre_main_t gre_main; @@ -275,11 +275,45 @@ gre_build_rewrite (vnet_main_t * vnm, 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; @@ -292,8 +326,44 @@ gre4_fixup (vlib_main_t * vm, } 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; @@ -306,35 +376,85 @@ gre6_fixup (vlib_main_t * vm, 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, + (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); } -static adj_walk_rc_t -mgre_mk_complete_walk (adj_index_t ai, void *ctx) +adj_walk_rc_t +mgre_mk_complete_walk (adj_index_t ai, void *data) { - nhrp_entry_adj_stack (ctx, ai); + 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); } @@ -346,20 +466,11 @@ mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) ip_adjacency_t *adj; nhrp_entry_t *ne; gre_tunnel_t *t; - adj_flags_t af; - u8 is_ipv6; 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); - is_ipv6 = t->tunnel_dst.fp_proto == FIB_PROTOCOL_IP6 ? 1 : 0; - af = ADJ_FLAG_MIDCHAIN_IP_STACK; - - 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), - &adj->sub_type.nbr.next_hop)); ne = nhrp_entry_find (sw_if_index, &adj->sub_type.nbr.next_hop); @@ -367,8 +478,13 @@ mgre_update_adj (vnet_main_t * vnm, u32 sw_if_index, adj_index_t ai) // no NHRP entry to provide the next-hop return; - adj_nbr_walk_nh (sw_if_index, t->tunnel_dst.fp_proto, - &adj->sub_type.nbr.next_hop, mgre_mk_complete_walk, ne); + 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 */