X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fip%2Fip6_forward.c;h=b53cdc473463b655e69e9b4bf2bfcbe55c94912a;hb=c7b8f203c0740ddd36bced39439aef63ea092d59;hp=3eb84e8b9ef0b2c5bc627eedf3bae735dd78c454;hpb=2ae2bc5380845d1480ec385749b7e8515e3b2185;p=vpp.git diff --git a/src/vnet/ip/ip6_forward.c b/src/vnet/ip/ip6_forward.c index 3eb84e8b9ef..b53cdc47346 100644 --- a/src/vnet/ip/ip6_forward.c +++ b/src/vnet/ip/ip6_forward.c @@ -975,12 +975,15 @@ ip6_urpf_loose_check (ip6_main_t * im, vlib_buffer_t * b, ip6_header_t * i) { const load_balance_t *lb0; index_t lbi; + u32 fib_index; - lbi = ip6_fib_table_fwding_lookup_with_if_index (im, - vnet_buffer - (b)->sw_if_index[VLIB_RX], - &i->src_address); + fib_index = vec_elt (im->fib_index_by_sw_if_index, + vnet_buffer (b)->sw_if_index[VLIB_RX]); + fib_index = + (vnet_buffer (b)->sw_if_index[VLIB_TX] == (u32) ~ 0) ? + fib_index : vnet_buffer (b)->sw_if_index[VLIB_TX]; + lbi = ip6_fib_table_fwding_lookup (im, fib_index, &i->src_address); lb0 = load_balance_get (lbi); return (fib_urpf_check_size (lb0->lb_urpf)); @@ -1352,7 +1355,6 @@ VLIB_REGISTER_NODE (ip6_local_node, static) = [IP_LOCAL_NEXT_PUNT] = "ip6-punt", [IP_LOCAL_NEXT_UDP_LOOKUP] = "ip6-udp-lookup", [IP_LOCAL_NEXT_ICMP] = "ip6-icmp-input", - [IP_LOCAL_NEXT_REASSEMBLY] = "ip6-reassembly", }, }; /* *INDENT-ON* */ @@ -1398,269 +1400,6 @@ ip6_register_protocol (u32 protocol, u32 node_index) vlib_node_add_next (vm, ip6_local_node.index, node_index); } -typedef enum -{ - IP6_DISCOVER_NEIGHBOR_NEXT_DROP, - IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX, - IP6_DISCOVER_NEIGHBOR_N_NEXT, -} ip6_discover_neighbor_next_t; - -typedef enum -{ - IP6_DISCOVER_NEIGHBOR_ERROR_DROP, - IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT, - IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS, -} ip6_discover_neighbor_error_t; - -static uword -ip6_discover_neighbor_inline (vlib_main_t * vm, - vlib_node_runtime_t * node, - vlib_frame_t * frame, int is_glean) -{ - vnet_main_t *vnm = vnet_get_main (); - ip6_main_t *im = &ip6_main; - ip_lookup_main_t *lm = &im->lookup_main; - u32 *from, *to_next_drop; - uword n_left_from, n_left_to_next_drop; - static f64 time_last_seed_change = -1e100; - static u32 hash_seeds[3]; - static uword hash_bitmap[256 / BITS (uword)]; - f64 time_now; - int bogus_length; - - if (node->flags & VLIB_NODE_FLAG_TRACE) - ip6_forward_next_trace (vm, node, frame, VLIB_TX); - - time_now = vlib_time_now (vm); - if (time_now - time_last_seed_change > 1e-3) - { - uword i; - u32 *r = clib_random_buffer_get_data (&vm->random_buffer, - sizeof (hash_seeds)); - for (i = 0; i < ARRAY_LEN (hash_seeds); i++) - hash_seeds[i] = r[i]; - - /* Mark all hash keys as been not-seen before. */ - for (i = 0; i < ARRAY_LEN (hash_bitmap); i++) - hash_bitmap[i] = 0; - - time_last_seed_change = time_now; - } - - from = vlib_frame_vector_args (frame); - n_left_from = frame->n_vectors; - - while (n_left_from > 0) - { - vlib_get_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP, - to_next_drop, n_left_to_next_drop); - - while (n_left_from > 0 && n_left_to_next_drop > 0) - { - vlib_buffer_t *p0; - ip6_header_t *ip0; - u32 pi0, adj_index0, a0, b0, c0, m0, sw_if_index0, drop0; - uword bm0; - ip_adjacency_t *adj0; - vnet_hw_interface_t *hw_if0; - u32 next0; - - pi0 = from[0]; - - p0 = vlib_get_buffer (vm, pi0); - - adj_index0 = vnet_buffer (p0)->ip.adj_index[VLIB_TX]; - - ip0 = vlib_buffer_get_current (p0); - - adj0 = adj_get (adj_index0); - - if (!is_glean) - { - ip0->dst_address.as_u64[0] = - adj0->sub_type.nbr.next_hop.ip6.as_u64[0]; - ip0->dst_address.as_u64[1] = - adj0->sub_type.nbr.next_hop.ip6.as_u64[1]; - } - - a0 = hash_seeds[0]; - b0 = hash_seeds[1]; - c0 = hash_seeds[2]; - - sw_if_index0 = adj0->rewrite_header.sw_if_index; - vnet_buffer (p0)->sw_if_index[VLIB_TX] = sw_if_index0; - - a0 ^= sw_if_index0; - b0 ^= ip0->dst_address.as_u32[0]; - c0 ^= ip0->dst_address.as_u32[1]; - - hash_v3_mix32 (a0, b0, c0); - - b0 ^= ip0->dst_address.as_u32[2]; - c0 ^= ip0->dst_address.as_u32[3]; - - hash_v3_finalize32 (a0, b0, c0); - - c0 &= BITS (hash_bitmap) - 1; - c0 = c0 / BITS (uword); - m0 = (uword) 1 << (c0 % BITS (uword)); - - bm0 = hash_bitmap[c0]; - drop0 = (bm0 & m0) != 0; - - /* Mark it as seen. */ - hash_bitmap[c0] = bm0 | m0; - - from += 1; - n_left_from -= 1; - to_next_drop[0] = pi0; - to_next_drop += 1; - n_left_to_next_drop -= 1; - - hw_if0 = vnet_get_sup_hw_interface (vnm, sw_if_index0); - - /* If the interface is link-down, drop the pkt */ - if (!(hw_if0->flags & VNET_HW_INTERFACE_FLAG_LINK_UP)) - drop0 = 1; - - p0->error = - node->errors[drop0 ? IP6_DISCOVER_NEIGHBOR_ERROR_DROP - : IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT]; - if (drop0) - continue; - - /* - * the adj has been updated to a rewrite but the node the DPO that got - * us here hasn't - yet. no big deal. we'll drop while we wait. - */ - if (IP_LOOKUP_NEXT_REWRITE == adj0->lookup_next_index) - continue; - - { - u32 bi0 = 0; - icmp6_neighbor_solicitation_header_t *h0; - vlib_buffer_t *b0; - - h0 = vlib_packet_template_get_packet - (vm, &im->discover_neighbor_packet_template, &bi0); - - /* - * Build ethernet header. - * Choose source address based on destination lookup - * adjacency. - */ - if (!ip6_src_address_for_packet (lm, - sw_if_index0, - &ip0->dst_address, - &h0->ip.src_address)) - { - /* There is no address on the interface */ - p0->error = - node->errors[IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS]; - vlib_buffer_free (vm, &bi0, 1); - continue; - } - - /* - * Destination address is a solicited node multicast address. - * We need to fill in - * the low 24 bits with low 24 bits of target's address. - */ - h0->ip.dst_address.as_u8[13] = ip0->dst_address.as_u8[13]; - h0->ip.dst_address.as_u8[14] = ip0->dst_address.as_u8[14]; - h0->ip.dst_address.as_u8[15] = ip0->dst_address.as_u8[15]; - - h0->neighbor.target_address = ip0->dst_address; - - clib_memcpy (h0->link_layer_option.ethernet_address, - hw_if0->hw_address, vec_len (hw_if0->hw_address)); - - /* $$$$ appears we need this; why is the checksum non-zero? */ - h0->neighbor.icmp.checksum = 0; - h0->neighbor.icmp.checksum = - ip6_tcp_udp_icmp_compute_checksum (vm, 0, &h0->ip, - &bogus_length); - - ASSERT (bogus_length == 0); - - vlib_buffer_copy_trace_flag (vm, p0, bi0); - b0 = vlib_get_buffer (vm, bi0); - vnet_buffer (b0)->sw_if_index[VLIB_TX] - = vnet_buffer (p0)->sw_if_index[VLIB_TX]; - - /* Add rewrite/encap string. */ - vnet_rewrite_one_header (adj0[0], h0, sizeof (ethernet_header_t)); - vlib_buffer_advance (b0, -adj0->rewrite_header.data_bytes); - - next0 = IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX; - - vlib_set_next_frame_buffer (vm, node, next0, bi0); - } - } - - vlib_put_next_frame (vm, node, IP6_DISCOVER_NEIGHBOR_NEXT_DROP, - n_left_to_next_drop); - } - - return frame->n_vectors; -} - -static uword -ip6_discover_neighbor (vlib_main_t * vm, - vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return (ip6_discover_neighbor_inline (vm, node, frame, 0)); -} - -static uword -ip6_glean (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) -{ - return (ip6_discover_neighbor_inline (vm, node, frame, 1)); -} - -static char *ip6_discover_neighbor_error_strings[] = { - [IP6_DISCOVER_NEIGHBOR_ERROR_DROP] = "address overflow drops", - [IP6_DISCOVER_NEIGHBOR_ERROR_REQUEST_SENT] = "neighbor solicitations sent", - [IP6_DISCOVER_NEIGHBOR_ERROR_NO_SOURCE_ADDRESS] - = "no source address for ND solicitation", -}; - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ip6_discover_neighbor_node) = -{ - .function = ip6_discover_neighbor, - .name = "ip6-discover-neighbor", - .vector_size = sizeof (u32), - .format_trace = format_ip6_forward_next_trace, - .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings), - .error_strings = ip6_discover_neighbor_error_strings, - .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT, - .next_nodes = - { - [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop", - [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output", - }, -}; -/* *INDENT-ON* */ - -/* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ip6_glean_node) = -{ - .function = ip6_glean, - .name = "ip6-glean", - .vector_size = sizeof (u32), - .format_trace = format_ip6_forward_next_trace, - .n_errors = ARRAY_LEN (ip6_discover_neighbor_error_strings), - .error_strings = ip6_discover_neighbor_error_strings, - .n_next_nodes = IP6_DISCOVER_NEIGHBOR_N_NEXT, - .next_nodes = - { - [IP6_DISCOVER_NEIGHBOR_NEXT_DROP] = "ip6-drop", - [IP6_DISCOVER_NEIGHBOR_NEXT_REPLY_TX] = "interface-output", - }, -}; -/* *INDENT-ON* */ - clib_error_t * ip6_probe_neighbor (vlib_main_t * vm, ip6_address_t * dst, u32 sw_if_index) { @@ -1772,6 +1511,12 @@ typedef enum IP6_REWRITE_NEXT_ICMP_ERROR, } ip6_rewrite_next_t; +/** + * This bits of an IPv6 address to mask to construct a multicast + * MAC address + */ +#define IP6_MCAST_ADDR_MASK 0xffffffff + always_inline uword ip6_rewrite_inline (vlib_main_t * vm, vlib_node_runtime_t * node, @@ -1975,8 +1720,16 @@ ip6_rewrite_inline (vlib_main_t * vm, /* * copy bytes from the IP address into the MAC rewrite */ - vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0); - vnet_fixup_one_header (adj1[0], &ip1->dst_address, ip1); + vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK, + adj0-> + rewrite_header.dst_mcast_offset, + &ip0->dst_address.as_u32[3], + (u8 *) ip0); + vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK, + adj1-> + rewrite_header.dst_mcast_offset, + &ip1->dst_address.as_u32[3], + (u8 *) ip1); } vlib_validate_buffer_enqueue_x2 (vm, node, next_index, @@ -2083,7 +1836,11 @@ ip6_rewrite_inline (vlib_main_t * vm, } if (is_mcast) { - vnet_fixup_one_header (adj0[0], &ip0->dst_address, ip0); + vnet_ip_mcast_fixup_header (IP6_MCAST_ADDR_MASK, + adj0-> + rewrite_header.dst_mcast_offset, + &ip0->dst_address.as_u32[3], + (u8 *) ip0); } p0->error = error_node->errors[error0]; @@ -2697,7 +2454,7 @@ ip6_hbh_register_option (u8 option, ip6_main_t *im = &ip6_main; ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; - ASSERT (option < ARRAY_LEN (hm->options)); + ASSERT ((u32) option < ARRAY_LEN (hm->options)); /* Already registered */ if (hm->options[option]) @@ -2718,7 +2475,7 @@ ip6_hbh_unregister_option (u8 option) ip6_main_t *im = &ip6_main; ip6_hop_by_hop_main_t *hm = &ip6_hop_by_hop_main; - ASSERT (option < ARRAY_LEN (hm->options)); + ASSERT ((u32) option < ARRAY_LEN (hm->options)); /* Not registered */ if (!hm->options[option])