| /* |
| * Copyright (c) 2015 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. |
| */ |
| #include "map.h" |
| |
| #include "../ip/ip_frag.h" |
| |
| #define IP6_MAP_T_DUAL_LOOP |
| |
| typedef enum |
| { |
| IP6_MAPT_NEXT_MAPT_TCP_UDP, |
| IP6_MAPT_NEXT_MAPT_ICMP, |
| IP6_MAPT_NEXT_MAPT_FRAGMENTED, |
| IP6_MAPT_NEXT_DROP, |
| IP6_MAPT_N_NEXT |
| } ip6_mapt_next_t; |
| |
| typedef enum |
| { |
| IP6_MAPT_ICMP_NEXT_IP4_LOOKUP, |
| IP6_MAPT_ICMP_NEXT_IP4_FRAG, |
| IP6_MAPT_ICMP_NEXT_DROP, |
| IP6_MAPT_ICMP_N_NEXT |
| } ip6_mapt_icmp_next_t; |
| |
| typedef enum |
| { |
| IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP, |
| IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG, |
| IP6_MAPT_TCP_UDP_NEXT_DROP, |
| IP6_MAPT_TCP_UDP_N_NEXT |
| } ip6_mapt_tcp_udp_next_t; |
| |
| typedef enum |
| { |
| IP6_MAPT_FRAGMENTED_NEXT_IP4_LOOKUP, |
| IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG, |
| IP6_MAPT_FRAGMENTED_NEXT_DROP, |
| IP6_MAPT_FRAGMENTED_N_NEXT |
| } ip6_mapt_fragmented_next_t; |
| |
| static_always_inline int |
| ip6_map_fragment_cache (ip6_header_t * ip6, ip6_frag_hdr_t * frag, |
| map_domain_t * d, u16 port) |
| { |
| u32 *ignore = NULL; |
| map_ip4_reass_lock (); |
| map_ip4_reass_t *r = map_ip4_reass_get (map_get_ip4 (&ip6->src_address), |
| ip6_map_t_embedded_address (d, |
| &ip6-> |
| dst_address), |
| frag_id_6to4 (frag->identification), |
| (ip6->protocol == |
| IP_PROTOCOL_ICMP6) ? |
| IP_PROTOCOL_ICMP : ip6->protocol, |
| &ignore); |
| if (r) |
| r->port = port; |
| |
| map_ip4_reass_unlock (); |
| return !r; |
| } |
| |
| /* Returns the associated port or -1 */ |
| static_always_inline i32 |
| ip6_map_fragment_get (ip6_header_t * ip6, ip6_frag_hdr_t * frag, |
| map_domain_t * d) |
| { |
| u32 *ignore = NULL; |
| map_ip4_reass_lock (); |
| map_ip4_reass_t *r = map_ip4_reass_get (map_get_ip4 (&ip6->src_address), |
| ip6_map_t_embedded_address (d, |
| &ip6-> |
| dst_address), |
| frag_id_6to4 (frag->identification), |
| (ip6->protocol == |
| IP_PROTOCOL_ICMP6) ? |
| IP_PROTOCOL_ICMP : ip6->protocol, |
| &ignore); |
| i32 ret = r ? r->port : -1; |
| map_ip4_reass_unlock (); |
| return ret; |
| } |
| |
| static_always_inline u8 |
| ip6_translate_tos (const ip6_header_t * ip6) |
| { |
| #ifdef IP6_MAP_T_OVERRIDE_TOS |
| return IP6_MAP_T_OVERRIDE_TOS; |
| #else |
| return (clib_net_to_host_u32 (ip6->ip_version_traffic_class_and_flow_label) |
| & 0x0ff00000) >> 20; |
| #endif |
| } |
| |
| //TODO: Find right place in memory for that |
| /* *INDENT-OFF* */ |
| static u8 icmp6_to_icmp_updater_pointer_table[] = |
| { 0, 1, ~0, ~0, |
| 2, 2, 9, 8, |
| 12, 12, 12, 12, |
| 12, 12, 12, 12, |
| 12, 12, 12, 12, |
| 12, 12, 12, 12, |
| 24, 24, 24, 24, |
| 24, 24, 24, 24, |
| 24, 24, 24, 24, |
| 24, 24, 24, 24 |
| }; |
| /* *INDENT-ON* */ |
| |
| static_always_inline int |
| ip6_icmp_to_icmp6_in_place (icmp46_header_t * icmp, u32 icmp_len, |
| i32 * sender_port, ip6_header_t ** inner_ip6) |
| { |
| *inner_ip6 = NULL; |
| switch (icmp->type) |
| { |
| case ICMP6_echo_request: |
| *sender_port = ((u16 *) icmp)[2]; |
| icmp->type = ICMP4_echo_request; |
| break; |
| case ICMP6_echo_reply: |
| *sender_port = ((u16 *) icmp)[2]; |
| icmp->type = ICMP4_echo_reply; |
| break; |
| case ICMP6_destination_unreachable: |
| *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8); |
| *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len); |
| |
| switch (icmp->code) |
| { |
| case ICMP6_destination_unreachable_no_route_to_destination: //0 |
| case ICMP6_destination_unreachable_beyond_scope_of_source_address: //2 |
| case ICMP6_destination_unreachable_address_unreachable: //3 |
| icmp->type = ICMP4_destination_unreachable; |
| icmp->code = |
| ICMP4_destination_unreachable_destination_unreachable_host; |
| break; |
| case ICMP6_destination_unreachable_destination_administratively_prohibited: //1 |
| icmp->type = |
| ICMP4_destination_unreachable; |
| icmp->code = |
| ICMP4_destination_unreachable_communication_administratively_prohibited; |
| break; |
| case ICMP6_destination_unreachable_port_unreachable: |
| icmp->type = ICMP4_destination_unreachable; |
| icmp->code = ICMP4_destination_unreachable_port_unreachable; |
| break; |
| default: |
| return -1; |
| } |
| break; |
| case ICMP6_packet_too_big: |
| *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8); |
| *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len); |
| |
| icmp->type = ICMP4_destination_unreachable; |
| icmp->code = 4; |
| { |
| u32 advertised_mtu = clib_net_to_host_u32 (*((u32 *) (icmp + 1))); |
| advertised_mtu -= 20; |
| //FIXME: = minimum(advertised MTU-20, MTU_of_IPv4_nexthop, (MTU_of_IPv6_nexthop)-20) |
| ((u16 *) (icmp))[3] = clib_host_to_net_u16 (advertised_mtu); |
| } |
| break; |
| |
| case ICMP6_time_exceeded: |
| *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8); |
| *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len); |
| |
| icmp->type = ICMP4_time_exceeded; |
| break; |
| |
| case ICMP6_parameter_problem: |
| *inner_ip6 = (ip6_header_t *) u8_ptr_add (icmp, 8); |
| *sender_port = ip6_get_port (*inner_ip6, MAP_RECEIVER, icmp_len); |
| |
| switch (icmp->code) |
| { |
| case ICMP6_parameter_problem_erroneous_header_field: |
| icmp->type = ICMP4_parameter_problem; |
| icmp->code = ICMP4_parameter_problem_pointer_indicates_error; |
| u32 pointer = clib_net_to_host_u32 (*((u32 *) (icmp + 1))); |
| if (pointer >= 40) |
| return -1; |
| |
| ((u8 *) (icmp + 1))[0] = |
| icmp6_to_icmp_updater_pointer_table[pointer]; |
| break; |
| case ICMP6_parameter_problem_unrecognized_next_header: |
| icmp->type = ICMP4_destination_unreachable; |
| icmp->code = ICMP4_destination_unreachable_port_unreachable; |
| break; |
| case ICMP6_parameter_problem_unrecognized_option: |
| default: |
| return -1; |
| } |
| break; |
| default: |
| return -1; |
| break; |
| } |
| return 0; |
| } |
| |
| static_always_inline void |
| _ip6_map_t_icmp (map_domain_t * d, vlib_buffer_t * p, u8 * error) |
| { |
| ip6_header_t *ip6, *inner_ip6; |
| ip4_header_t *ip4, *inner_ip4; |
| u32 ip6_pay_len; |
| icmp46_header_t *icmp; |
| i32 sender_port; |
| ip_csum_t csum; |
| u32 ip4_sadr, inner_ip4_dadr; |
| |
| ip6 = vlib_buffer_get_current (p); |
| ip6_pay_len = clib_net_to_host_u16 (ip6->payload_length); |
| icmp = (icmp46_header_t *) (ip6 + 1); |
| ASSERT (ip6_pay_len + sizeof (*ip6) <= p->current_length); |
| |
| if (ip6->protocol != IP_PROTOCOL_ICMP6) |
| { |
| //No extensions headers allowed here |
| //TODO: SR header |
| *error = MAP_ERROR_MALFORMED; |
| return; |
| } |
| |
| //There are no fragmented ICMP messages, so no extension header for now |
| |
| if (ip6_icmp_to_icmp6_in_place |
| (icmp, ip6_pay_len, &sender_port, &inner_ip6)) |
| { |
| //TODO: In case of 1:1 mapping it is not necessary to have the sender port |
| *error = MAP_ERROR_ICMP; |
| return; |
| } |
| |
| if (sender_port < 0) |
| { |
| // In case of 1:1 mapping, we don't care about the port |
| if (d->ea_bits_len == 0 && d->rules) |
| { |
| sender_port = 0; |
| } |
| else |
| { |
| *error = MAP_ERROR_ICMP; |
| return; |
| } |
| } |
| |
| //Security check |
| //Note that this prevents an intermediate IPv6 router from answering the request |
| ip4_sadr = map_get_ip4 (&ip6->src_address); |
| if (ip6->src_address.as_u64[0] != map_get_pfx_net (d, ip4_sadr, sender_port) |
| || ip6->src_address.as_u64[1] != map_get_sfx_net (d, ip4_sadr, |
| sender_port)) |
| { |
| *error = MAP_ERROR_SEC_CHECK; |
| return; |
| } |
| |
| if (inner_ip6) |
| { |
| u16 *inner_L4_checksum, inner_l4_offset, inner_frag_offset, |
| inner_frag_id; |
| u8 *inner_l4, inner_protocol; |
| |
| //We have two headers to translate |
| // FROM |
| // [ IPv6 ]<- ext ->[IC][ IPv6 ]<- ext ->[L4 header ... |
| // Handled cases: |
| // [ IPv6 ][IC][ IPv6 ][L4 header ... |
| // [ IPv6 ][IC][ IPv6 ][Fr][L4 header ... |
| // TO |
| // [ IPv4][IC][ IPv4][L4 header ... |
| |
| //TODO: This was already done deep in ip6_icmp_to_icmp6_in_place |
| //We shouldn't have to do it again |
| if (ip6_parse (inner_ip6, ip6_pay_len - 8, |
| &inner_protocol, &inner_l4_offset, &inner_frag_offset)) |
| { |
| *error = MAP_ERROR_MALFORMED; |
| return; |
| } |
| |
| inner_l4 = u8_ptr_add (inner_ip6, inner_l4_offset); |
| inner_ip4 = |
| (ip4_header_t *) u8_ptr_add (inner_l4, -sizeof (*inner_ip4)); |
| if (inner_frag_offset) |
| { |
| ip6_frag_hdr_t *inner_frag = |
| (ip6_frag_hdr_t *) u8_ptr_add (inner_ip6, inner_frag_offset); |
| inner_frag_id = frag_id_6to4 (inner_frag->identification); |
| } |
| else |
| { |
| inner_frag_id = 0; |
| } |
| |
| //Do the translation of the inner packet |
| if (inner_protocol == IP_PROTOCOL_TCP) |
| { |
| inner_L4_checksum = (u16 *) u8_ptr_add (inner_l4, 16); |
| } |
| else if (inner_protocol == IP_PROTOCOL_UDP) |
| { |
| inner_L4_checksum = (u16 *) u8_ptr_add (inner_l4, 6); |
| } |
| else if (inner_protocol == IP_PROTOCOL_ICMP6) |
| { |
| icmp46_header_t *inner_icmp = (icmp46_header_t *) inner_l4; |
| csum = inner_icmp->checksum; |
| csum = ip_csum_sub_even (csum, *((u16 *) inner_icmp)); |
| //It cannot be of a different type as ip6_icmp_to_icmp6_in_place succeeded |
| inner_icmp->type = (inner_icmp->type == ICMP6_echo_request) ? |
| ICMP4_echo_request : ICMP4_echo_reply; |
| csum = ip_csum_add_even (csum, *((u16 *) inner_icmp)); |
| inner_icmp->checksum = ip_csum_fold (csum); |
| inner_protocol = IP_PROTOCOL_ICMP; //Will be copied to ip6 later |
| inner_L4_checksum = &inner_icmp->checksum; |
| } |
| else |
| { |
| *error = MAP_ERROR_BAD_PROTOCOL; |
| return; |
| } |
| |
| csum = *inner_L4_checksum; |
| csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[0]); |
| csum = ip_csum_sub_even (csum, inner_ip6->src_address.as_u64[1]); |
| csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[0]); |
| csum = ip_csum_sub_even (csum, inner_ip6->dst_address.as_u64[1]); |
| |
| //Sanity check of the outer destination address |
| if (ip6->dst_address.as_u64[0] != inner_ip6->src_address.as_u64[0] && |
| ip6->dst_address.as_u64[1] != inner_ip6->src_address.as_u64[1]) |
| { |
| *error = MAP_ERROR_SEC_CHECK; |
| return; |
| } |
| |
| //Security check of inner packet |
| inner_ip4_dadr = map_get_ip4 (&inner_ip6->dst_address); |
| if (inner_ip6->dst_address.as_u64[0] != |
| map_get_pfx_net (d, inner_ip4_dadr, sender_port) |
| || inner_ip6->dst_address.as_u64[1] != map_get_sfx_net (d, |
| inner_ip4_dadr, |
| sender_port)) |
| { |
| *error = MAP_ERROR_SEC_CHECK; |
| return; |
| } |
| |
| inner_ip4->dst_address.as_u32 = inner_ip4_dadr; |
| inner_ip4->src_address.as_u32 = |
| ip6_map_t_embedded_address (d, &inner_ip6->src_address); |
| inner_ip4->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| inner_ip4->tos = ip6_translate_tos (inner_ip6); |
| inner_ip4->length = |
| u16_net_add (inner_ip6->payload_length, |
| sizeof (*ip4) + sizeof (*ip6) - inner_l4_offset); |
| inner_ip4->fragment_id = inner_frag_id; |
| inner_ip4->flags_and_fragment_offset = |
| clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS); |
| inner_ip4->ttl = inner_ip6->hop_limit; |
| inner_ip4->protocol = inner_protocol; |
| inner_ip4->checksum = ip4_header_checksum (inner_ip4); |
| |
| if (inner_ip4->protocol == IP_PROTOCOL_ICMP) |
| { |
| //Remove remainings of the pseudo-header in the csum |
| csum = |
| ip_csum_sub_even (csum, clib_host_to_net_u16 (IP_PROTOCOL_ICMP6)); |
| csum = |
| ip_csum_sub_even (csum, inner_ip4->length - sizeof (*inner_ip4)); |
| } |
| else |
| { |
| //Update to new pseudo-header |
| csum = ip_csum_add_even (csum, inner_ip4->src_address.as_u32); |
| csum = ip_csum_add_even (csum, inner_ip4->dst_address.as_u32); |
| } |
| *inner_L4_checksum = ip_csum_fold (csum); |
| |
| //Move up icmp header |
| ip4 = (ip4_header_t *) u8_ptr_add (inner_l4, -2 * sizeof (*ip4) - 8); |
| clib_memcpy (u8_ptr_add (inner_l4, -sizeof (*ip4) - 8), icmp, 8); |
| icmp = (icmp46_header_t *) u8_ptr_add (inner_l4, -sizeof (*ip4) - 8); |
| } |
| else |
| { |
| //Only one header to translate |
| ip4 = (ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)); |
| } |
| vlib_buffer_advance (p, (u32) (((u8 *) ip4) - ((u8 *) ip6))); |
| |
| ip4->dst_address.as_u32 = ip6_map_t_embedded_address (d, &ip6->dst_address); |
| ip4->src_address.as_u32 = ip4_sadr; |
| ip4->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| ip4->tos = ip6_translate_tos (ip6); |
| ip4->fragment_id = 0; |
| ip4->flags_and_fragment_offset = 0; |
| ip4->ttl = ip6->hop_limit; |
| ip4->protocol = IP_PROTOCOL_ICMP; |
| //TODO fix the length depending on offset length |
| ip4->length = u16_net_add (ip6->payload_length, |
| (inner_ip6 == |
| NULL) ? sizeof (*ip4) : (2 * sizeof (*ip4) - |
| sizeof (*ip6))); |
| ip4->checksum = ip4_header_checksum (ip4); |
| |
| //TODO: We could do an easy diff-checksum for echo requests/replies |
| //Recompute ICMP checksum |
| icmp->checksum = 0; |
| csum = |
| ip_incremental_checksum (0, icmp, |
| clib_net_to_host_u16 (ip4->length) - |
| sizeof (*ip4)); |
| icmp->checksum = ~ip_csum_fold (csum); |
| } |
| |
| static uword |
| ip6_map_t_icmp (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| u32 n_left_from, *from, next_index, *to_next, n_left_to_next; |
| vlib_node_runtime_t *error_node = |
| vlib_node_get_runtime (vm, ip6_map_t_icmp_node.index); |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next_index = node->cached_next_index; |
| vlib_combined_counter_main_t *cm = map_main.domain_counters; |
| u32 cpu_index = os_get_cpu_number (); |
| |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| u32 pi0; |
| vlib_buffer_t *p0; |
| u8 error0; |
| ip6_mapt_icmp_next_t next0; |
| map_domain_t *d0; |
| u16 len0; |
| |
| pi0 = to_next[0] = from[0]; |
| from += 1; |
| n_left_from -= 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| error0 = MAP_ERROR_NONE; |
| next0 = IP6_MAPT_ICMP_NEXT_IP4_LOOKUP; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| len0 = |
| clib_net_to_host_u16 (((ip6_header_t *) |
| vlib_buffer_get_current |
| (p0))->payload_length); |
| d0 = |
| pool_elt_at_index (map_main.domains, |
| vnet_buffer (p0)->map_t.map_domain_index); |
| _ip6_map_t_icmp (d0, p0, &error0); |
| |
| if (vnet_buffer (p0)->map_t.mtu < p0->current_length) |
| { |
| //Send to fragmentation node if necessary |
| vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; |
| vnet_buffer (p0)->ip_frag.header_offset = 0; |
| vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; |
| next0 = IP6_MAPT_ICMP_NEXT_IP4_FRAG; |
| } |
| |
| if (PREDICT_TRUE (error0 == MAP_ERROR_NONE)) |
| { |
| vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX, |
| cpu_index, |
| vnet_buffer (p0)-> |
| map_t.map_domain_index, 1, |
| len0); |
| } |
| else |
| { |
| next0 = IP6_MAPT_ICMP_NEXT_DROP; |
| } |
| |
| p0->error = error_node->errors[error0]; |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| to_next, n_left_to_next, pi0, |
| next0); |
| } |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| return frame->n_vectors; |
| } |
| |
| static uword |
| ip6_map_t_fragmented (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| u32 n_left_from, *from, next_index, *to_next, n_left_to_next; |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next_index = node->cached_next_index; |
| |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| #ifdef IP6_MAP_T_DUAL_LOOP |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| u32 pi0, pi1; |
| vlib_buffer_t *p0, *p1; |
| ip6_header_t *ip60, *ip61; |
| ip6_frag_hdr_t *frag0, *frag1; |
| ip4_header_t *ip40, *ip41; |
| u16 frag_id0, frag_offset0, frag_id1, frag_offset1; |
| u8 frag_more0, frag_more1; |
| u32 next0, next1; |
| |
| pi0 = to_next[0] = from[0]; |
| pi1 = to_next[1] = from[1]; |
| from += 2; |
| n_left_from -= 2; |
| to_next += 2; |
| n_left_to_next -= 2; |
| |
| next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP; |
| next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP; |
| p0 = vlib_get_buffer (vm, pi0); |
| p1 = vlib_get_buffer (vm, pi1); |
| ip60 = vlib_buffer_get_current (p0); |
| ip61 = vlib_buffer_get_current (p1); |
| frag0 = |
| (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.frag_offset); |
| frag1 = |
| (ip6_frag_hdr_t *) u8_ptr_add (ip61, |
| vnet_buffer (p1)->map_t. |
| v6.frag_offset); |
| ip40 = |
| (ip4_header_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.l4_offset - sizeof (*ip40)); |
| ip41 = |
| (ip4_header_t *) u8_ptr_add (ip61, |
| vnet_buffer (p1)->map_t. |
| v6.l4_offset - sizeof (*ip40)); |
| vlib_buffer_advance (p0, |
| vnet_buffer (p0)->map_t.v6.l4_offset - |
| sizeof (*ip40)); |
| vlib_buffer_advance (p1, |
| vnet_buffer (p1)->map_t.v6.l4_offset - |
| sizeof (*ip40)); |
| |
| frag_id0 = frag_id_6to4 (frag0->identification); |
| frag_id1 = frag_id_6to4 (frag1->identification); |
| frag_more0 = ip6_frag_hdr_more (frag0); |
| frag_more1 = ip6_frag_hdr_more (frag1); |
| frag_offset0 = ip6_frag_hdr_offset (frag0); |
| frag_offset1 = ip6_frag_hdr_offset (frag1); |
| |
| ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr; |
| ip41->dst_address.as_u32 = vnet_buffer (p1)->map_t.v6.daddr; |
| ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr; |
| ip41->src_address.as_u32 = vnet_buffer (p1)->map_t.v6.saddr; |
| ip40->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| ip41->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| ip40->tos = ip6_translate_tos (ip60); |
| ip41->tos = ip6_translate_tos (ip61); |
| ip40->length = u16_net_add (ip60->payload_length, |
| sizeof (*ip40) - |
| vnet_buffer (p0)->map_t.v6.l4_offset + |
| sizeof (*ip60)); |
| ip41->length = |
| u16_net_add (ip61->payload_length, |
| sizeof (*ip40) - |
| vnet_buffer (p1)->map_t.v6.l4_offset + |
| sizeof (*ip60)); |
| ip40->fragment_id = frag_id0; |
| ip41->fragment_id = frag_id1; |
| ip40->flags_and_fragment_offset = |
| clib_host_to_net_u16 (frag_offset0 | |
| (frag_more0 ? IP4_HEADER_FLAG_MORE_FRAGMENTS |
| : 0)); |
| ip41->flags_and_fragment_offset = |
| clib_host_to_net_u16 (frag_offset1 | |
| (frag_more1 ? IP4_HEADER_FLAG_MORE_FRAGMENTS |
| : 0)); |
| ip40->ttl = ip60->hop_limit; |
| ip41->ttl = ip61->hop_limit; |
| ip40->protocol = |
| (vnet_buffer (p0)->map_t.v6.l4_protocol == |
| IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p0)-> |
| map_t.v6.l4_protocol; |
| ip41->protocol = |
| (vnet_buffer (p1)->map_t.v6.l4_protocol == |
| IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p1)-> |
| map_t.v6.l4_protocol; |
| ip40->checksum = ip4_header_checksum (ip40); |
| ip41->checksum = ip4_header_checksum (ip41); |
| |
| if (vnet_buffer (p0)->map_t.mtu < p0->current_length) |
| { |
| vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; |
| vnet_buffer (p0)->ip_frag.header_offset = 0; |
| vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; |
| next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG; |
| } |
| |
| if (vnet_buffer (p1)->map_t.mtu < p1->current_length) |
| { |
| vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu; |
| vnet_buffer (p1)->ip_frag.header_offset = 0; |
| vnet_buffer (p1)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; |
| next1 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG; |
| } |
| |
| vlib_validate_buffer_enqueue_x2 (vm, node, next_index, |
| to_next, n_left_to_next, pi0, pi1, |
| next0, next1); |
| } |
| #endif |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| u32 pi0; |
| vlib_buffer_t *p0; |
| ip6_header_t *ip60; |
| ip6_frag_hdr_t *frag0; |
| ip4_header_t *ip40; |
| u16 frag_id0; |
| u8 frag_more0; |
| u16 frag_offset0; |
| u32 next0; |
| |
| pi0 = to_next[0] = from[0]; |
| from += 1; |
| n_left_from -= 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| |
| next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP; |
| p0 = vlib_get_buffer (vm, pi0); |
| ip60 = vlib_buffer_get_current (p0); |
| frag0 = |
| (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.frag_offset); |
| ip40 = |
| (ip4_header_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.l4_offset - sizeof (*ip40)); |
| vlib_buffer_advance (p0, |
| vnet_buffer (p0)->map_t.v6.l4_offset - |
| sizeof (*ip40)); |
| |
| frag_id0 = frag_id_6to4 (frag0->identification); |
| frag_more0 = ip6_frag_hdr_more (frag0); |
| frag_offset0 = ip6_frag_hdr_offset (frag0); |
| |
| ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr; |
| ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr; |
| ip40->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| ip40->tos = ip6_translate_tos (ip60); |
| ip40->length = u16_net_add (ip60->payload_length, |
| sizeof (*ip40) - |
| vnet_buffer (p0)->map_t.v6.l4_offset + |
| sizeof (*ip60)); |
| ip40->fragment_id = frag_id0; |
| ip40->flags_and_fragment_offset = |
| clib_host_to_net_u16 (frag_offset0 | |
| (frag_more0 ? IP4_HEADER_FLAG_MORE_FRAGMENTS |
| : 0)); |
| ip40->ttl = ip60->hop_limit; |
| ip40->protocol = |
| (vnet_buffer (p0)->map_t.v6.l4_protocol == |
| IP_PROTOCOL_ICMP6) ? IP_PROTOCOL_ICMP : vnet_buffer (p0)-> |
| map_t.v6.l4_protocol; |
| ip40->checksum = ip4_header_checksum (ip40); |
| |
| if (vnet_buffer (p0)->map_t.mtu < p0->current_length) |
| { |
| //Send to fragmentation node if necessary |
| vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; |
| vnet_buffer (p0)->ip_frag.header_offset = 0; |
| vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; |
| next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG; |
| } |
| |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| to_next, n_left_to_next, pi0, |
| next0); |
| } |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| return frame->n_vectors; |
| } |
| |
| static uword |
| ip6_map_t_tcp_udp (vlib_main_t * vm, |
| vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| u32 n_left_from, *from, next_index, *to_next, n_left_to_next; |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next_index = node->cached_next_index; |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| #ifdef IP6_MAP_T_DUAL_LOOP |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| u32 pi0, pi1; |
| vlib_buffer_t *p0, *p1; |
| ip6_header_t *ip60, *ip61; |
| ip_csum_t csum0, csum1; |
| ip4_header_t *ip40, *ip41; |
| u16 fragment_id0, flags0, *checksum0, |
| fragment_id1, flags1, *checksum1; |
| ip6_mapt_tcp_udp_next_t next0, next1; |
| |
| pi0 = to_next[0] = from[0]; |
| pi1 = to_next[1] = from[1]; |
| from += 2; |
| n_left_from -= 2; |
| to_next += 2; |
| n_left_to_next -= 2; |
| next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP; |
| next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| p1 = vlib_get_buffer (vm, pi1); |
| ip60 = vlib_buffer_get_current (p0); |
| ip61 = vlib_buffer_get_current (p1); |
| ip40 = |
| (ip4_header_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.l4_offset - sizeof (*ip40)); |
| ip41 = |
| (ip4_header_t *) u8_ptr_add (ip61, |
| vnet_buffer (p1)->map_t. |
| v6.l4_offset - sizeof (*ip40)); |
| vlib_buffer_advance (p0, |
| vnet_buffer (p0)->map_t.v6.l4_offset - |
| sizeof (*ip40)); |
| vlib_buffer_advance (p1, |
| vnet_buffer (p1)->map_t.v6.l4_offset - |
| sizeof (*ip40)); |
| checksum0 = |
| (u16 *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t.checksum_offset); |
| checksum1 = |
| (u16 *) u8_ptr_add (ip61, |
| vnet_buffer (p1)->map_t.checksum_offset); |
| |
| csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]); |
| csum1 = ip_csum_sub_even (*checksum1, ip61->src_address.as_u64[0]); |
| csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]); |
| csum1 = ip_csum_sub_even (csum1, ip61->src_address.as_u64[1]); |
| csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[0]); |
| csum1 = ip_csum_sub_even (csum0, ip61->dst_address.as_u64[0]); |
| csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[1]); |
| csum1 = ip_csum_sub_even (csum1, ip61->dst_address.as_u64[1]); |
| csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.daddr); |
| csum1 = ip_csum_add_even (csum1, vnet_buffer (p1)->map_t.v6.daddr); |
| csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.saddr); |
| csum1 = ip_csum_add_even (csum1, vnet_buffer (p1)->map_t.v6.saddr); |
| *checksum0 = ip_csum_fold (csum0); |
| *checksum1 = ip_csum_fold (csum1); |
| |
| if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset)) |
| { |
| ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer |
| (p0)-> |
| map_t. |
| v6.frag_offset); |
| fragment_id0 = frag_id_6to4 (hdr->identification); |
| flags0 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS); |
| } |
| else |
| { |
| fragment_id0 = 0; |
| flags0 = 0; |
| } |
| |
| if (PREDICT_FALSE (vnet_buffer (p1)->map_t.v6.frag_offset)) |
| { |
| ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip61, |
| vnet_buffer |
| (p1)-> |
| map_t. |
| v6.frag_offset); |
| fragment_id1 = frag_id_6to4 (hdr->identification); |
| flags1 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS); |
| } |
| else |
| { |
| fragment_id1 = 0; |
| flags1 = 0; |
| } |
| |
| ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr; |
| ip41->dst_address.as_u32 = vnet_buffer (p1)->map_t.v6.daddr; |
| ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr; |
| ip41->src_address.as_u32 = vnet_buffer (p1)->map_t.v6.saddr; |
| ip40->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| ip41->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| ip40->tos = ip6_translate_tos (ip60); |
| ip41->tos = ip6_translate_tos (ip61); |
| ip40->length = u16_net_add (ip60->payload_length, |
| sizeof (*ip40) + sizeof (*ip60) - |
| vnet_buffer (p0)->map_t.v6.l4_offset); |
| ip41->length = |
| u16_net_add (ip61->payload_length, |
| sizeof (*ip40) + sizeof (*ip60) - |
| vnet_buffer (p1)->map_t.v6.l4_offset); |
| ip40->fragment_id = fragment_id0; |
| ip41->fragment_id = fragment_id1; |
| ip40->flags_and_fragment_offset = flags0; |
| ip41->flags_and_fragment_offset = flags1; |
| ip40->ttl = ip60->hop_limit; |
| ip41->ttl = ip61->hop_limit; |
| ip40->protocol = vnet_buffer (p0)->map_t.v6.l4_protocol; |
| ip41->protocol = vnet_buffer (p1)->map_t.v6.l4_protocol; |
| ip40->checksum = ip4_header_checksum (ip40); |
| ip41->checksum = ip4_header_checksum (ip41); |
| |
| if (vnet_buffer (p0)->map_t.mtu < p0->current_length) |
| { |
| vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; |
| vnet_buffer (p0)->ip_frag.header_offset = 0; |
| vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; |
| next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG; |
| } |
| |
| if (vnet_buffer (p1)->map_t.mtu < p1->current_length) |
| { |
| vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu; |
| vnet_buffer (p1)->ip_frag.header_offset = 0; |
| vnet_buffer (p1)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; |
| next1 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG; |
| } |
| |
| vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, |
| n_left_to_next, pi0, pi1, next0, |
| next1); |
| } |
| #endif |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| u32 pi0; |
| vlib_buffer_t *p0; |
| ip6_header_t *ip60; |
| u16 *checksum0; |
| ip_csum_t csum0; |
| ip4_header_t *ip40; |
| u16 fragment_id0; |
| u16 flags0; |
| ip6_mapt_tcp_udp_next_t next0; |
| |
| pi0 = to_next[0] = from[0]; |
| from += 1; |
| n_left_from -= 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| ip60 = vlib_buffer_get_current (p0); |
| ip40 = |
| (ip4_header_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.l4_offset - sizeof (*ip40)); |
| vlib_buffer_advance (p0, |
| vnet_buffer (p0)->map_t.v6.l4_offset - |
| sizeof (*ip40)); |
| checksum0 = |
| (u16 *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t.checksum_offset); |
| |
| //TODO: This can probably be optimized |
| csum0 = ip_csum_sub_even (*checksum0, ip60->src_address.as_u64[0]); |
| csum0 = ip_csum_sub_even (csum0, ip60->src_address.as_u64[1]); |
| csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[0]); |
| csum0 = ip_csum_sub_even (csum0, ip60->dst_address.as_u64[1]); |
| csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.daddr); |
| csum0 = ip_csum_add_even (csum0, vnet_buffer (p0)->map_t.v6.saddr); |
| *checksum0 = ip_csum_fold (csum0); |
| |
| if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset)) |
| { |
| //Only the first fragment |
| ip6_frag_hdr_t *hdr = (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer |
| (p0)-> |
| map_t. |
| v6.frag_offset); |
| fragment_id0 = frag_id_6to4 (hdr->identification); |
| flags0 = clib_host_to_net_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS); |
| } |
| else |
| { |
| fragment_id0 = 0; |
| flags0 = 0; |
| } |
| |
| ip40->dst_address.as_u32 = vnet_buffer (p0)->map_t.v6.daddr; |
| ip40->src_address.as_u32 = vnet_buffer (p0)->map_t.v6.saddr; |
| ip40->ip_version_and_header_length = |
| IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; |
| ip40->tos = ip6_translate_tos (ip60); |
| ip40->length = u16_net_add (ip60->payload_length, |
| sizeof (*ip40) + sizeof (*ip60) - |
| vnet_buffer (p0)->map_t.v6.l4_offset); |
| ip40->fragment_id = fragment_id0; |
| ip40->flags_and_fragment_offset = flags0; |
| ip40->ttl = ip60->hop_limit; |
| ip40->protocol = vnet_buffer (p0)->map_t.v6.l4_protocol; |
| ip40->checksum = ip4_header_checksum (ip40); |
| |
| if (vnet_buffer (p0)->map_t.mtu < p0->current_length) |
| { |
| //Send to fragmentation node if necessary |
| vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; |
| vnet_buffer (p0)->ip_frag.header_offset = 0; |
| vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; |
| next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG; |
| } |
| |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| to_next, n_left_to_next, pi0, |
| next0); |
| } |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| return frame->n_vectors; |
| } |
| |
| static_always_inline void |
| ip6_map_t_classify (vlib_buffer_t * p0, ip6_header_t * ip60, |
| map_domain_t * d0, i32 * src_port0, |
| u8 * error0, ip6_mapt_next_t * next0, |
| u32 l4_len0, ip6_frag_hdr_t * frag0) |
| { |
| if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset && |
| ip6_frag_hdr_offset (frag0))) |
| { |
| *next0 = IP6_MAPT_NEXT_MAPT_FRAGMENTED; |
| if (d0->ea_bits_len == 0 && d0->rules) |
| { |
| *src_port0 = 0; |
| } |
| else |
| { |
| *src_port0 = ip6_map_fragment_get (ip60, frag0, d0); |
| *error0 = (*src_port0 != -1) ? *error0 : MAP_ERROR_FRAGMENT_DROPPED; |
| } |
| } |
| else |
| if (PREDICT_TRUE |
| (vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_TCP)) |
| { |
| *error0 = |
| l4_len0 < sizeof (tcp_header_t) ? MAP_ERROR_MALFORMED : *error0; |
| vnet_buffer (p0)->map_t.checksum_offset = |
| vnet_buffer (p0)->map_t.v6.l4_offset + 16; |
| *next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP; |
| *src_port0 = |
| (i32) * |
| ((u16 *) u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset)); |
| } |
| else |
| if (PREDICT_TRUE |
| (vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_UDP)) |
| { |
| *error0 = |
| l4_len0 < sizeof (udp_header_t) ? MAP_ERROR_MALFORMED : *error0; |
| vnet_buffer (p0)->map_t.checksum_offset = |
| vnet_buffer (p0)->map_t.v6.l4_offset + 6; |
| *next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP; |
| *src_port0 = |
| (i32) * |
| ((u16 *) u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset)); |
| } |
| else if (vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_ICMP6) |
| { |
| *error0 = |
| l4_len0 < sizeof (icmp46_header_t) ? MAP_ERROR_MALFORMED : *error0; |
| *next0 = IP6_MAPT_NEXT_MAPT_ICMP; |
| if (d0->ea_bits_len == 0 && d0->rules) |
| { |
| *src_port0 = 0; |
| } |
| else |
| if (((icmp46_header_t *) |
| u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t.v6.l4_offset))->code == |
| ICMP6_echo_reply |
| || ((icmp46_header_t *) |
| u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t.v6.l4_offset))->code == |
| ICMP6_echo_request) |
| { |
| *src_port0 = |
| (i32) * |
| ((u16 *) |
| u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset + 6)); |
| } |
| } |
| else |
| { |
| //TODO: In case of 1:1 mapping, it might be possible to do something with those packets. |
| *error0 = MAP_ERROR_BAD_PROTOCOL; |
| } |
| } |
| |
| static uword |
| ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) |
| { |
| u32 n_left_from, *from, next_index, *to_next, n_left_to_next; |
| vlib_node_runtime_t *error_node = |
| vlib_node_get_runtime (vm, ip6_map_t_node.index); |
| vlib_combined_counter_main_t *cm = map_main.domain_counters; |
| u32 cpu_index = os_get_cpu_number (); |
| |
| from = vlib_frame_vector_args (frame); |
| n_left_from = frame->n_vectors; |
| next_index = node->cached_next_index; |
| while (n_left_from > 0) |
| { |
| vlib_get_next_frame (vm, node, next_index, to_next, n_left_to_next); |
| |
| #ifdef IP6_MAP_T_DUAL_LOOP |
| while (n_left_from >= 4 && n_left_to_next >= 2) |
| { |
| u32 pi0, pi1; |
| vlib_buffer_t *p0, *p1; |
| ip6_header_t *ip60, *ip61; |
| u8 error0, error1; |
| ip6_mapt_next_t next0, next1; |
| u32 l4_len0, l4_len1; |
| i32 src_port0, src_port1; |
| map_domain_t *d0, *d1; |
| ip6_frag_hdr_t *frag0, *frag1; |
| u32 saddr0, saddr1; |
| next0 = next1 = 0; //Because compiler whines |
| |
| pi0 = to_next[0] = from[0]; |
| pi1 = to_next[1] = from[1]; |
| from += 2; |
| n_left_from -= 2; |
| to_next += 2; |
| n_left_to_next -= 2; |
| |
| error0 = MAP_ERROR_NONE; |
| error1 = MAP_ERROR_NONE; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| p1 = vlib_get_buffer (vm, pi1); |
| ip60 = vlib_buffer_get_current (p0); |
| ip61 = vlib_buffer_get_current (p1); |
| |
| saddr0 = map_get_ip4 (&ip60->src_address); |
| saddr1 = map_get_ip4 (&ip61->src_address); |
| d0 = ip6_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX], |
| (ip4_address_t *) & saddr0, |
| &vnet_buffer (p0)->map_t.map_domain_index, |
| &error0); |
| d1 = |
| ip6_map_get_domain (vnet_buffer (p1)->ip.adj_index[VLIB_TX], |
| (ip4_address_t *) & saddr1, |
| &vnet_buffer (p1)->map_t.map_domain_index, |
| &error1); |
| |
| vnet_buffer (p0)->map_t.v6.saddr = saddr0; |
| vnet_buffer (p1)->map_t.v6.saddr = saddr1; |
| vnet_buffer (p0)->map_t.v6.daddr = |
| ip6_map_t_embedded_address (d0, &ip60->dst_address); |
| vnet_buffer (p1)->map_t.v6.daddr = |
| ip6_map_t_embedded_address (d1, &ip61->dst_address); |
| vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0; |
| vnet_buffer (p1)->map_t.mtu = d1->mtu ? d1->mtu : ~0; |
| |
| if (PREDICT_FALSE (ip6_parse (ip60, p0->current_length, |
| &(vnet_buffer (p0)->map_t. |
| v6.l4_protocol), |
| &(vnet_buffer (p0)->map_t. |
| v6.l4_offset), |
| &(vnet_buffer (p0)->map_t. |
| v6.frag_offset)))) |
| { |
| error0 = MAP_ERROR_MALFORMED; |
| next0 = IP6_MAPT_NEXT_DROP; |
| } |
| |
| if (PREDICT_FALSE (ip6_parse (ip61, p1->current_length, |
| &(vnet_buffer (p1)->map_t. |
| v6.l4_protocol), |
| &(vnet_buffer (p1)->map_t. |
| v6.l4_offset), |
| &(vnet_buffer (p1)->map_t. |
| v6.frag_offset)))) |
| { |
| error1 = MAP_ERROR_MALFORMED; |
| next1 = IP6_MAPT_NEXT_DROP; |
| } |
| |
| src_port0 = src_port1 = -1; |
| l4_len0 = (u32) clib_net_to_host_u16 (ip60->payload_length) + |
| sizeof (*ip60) - vnet_buffer (p0)->map_t.v6.l4_offset; |
| l4_len1 = (u32) clib_net_to_host_u16 (ip61->payload_length) + |
| sizeof (*ip60) - vnet_buffer (p1)->map_t.v6.l4_offset; |
| frag0 = |
| (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.frag_offset); |
| frag1 = |
| (ip6_frag_hdr_t *) u8_ptr_add (ip61, |
| vnet_buffer (p1)->map_t. |
| v6.frag_offset); |
| |
| ip6_map_t_classify (p0, ip60, d0, &src_port0, &error0, &next0, |
| l4_len0, frag0); |
| ip6_map_t_classify (p1, ip61, d1, &src_port1, &error1, &next1, |
| l4_len1, frag1); |
| |
| if (PREDICT_FALSE |
| ((src_port0 != -1) |
| && (ip60->src_address.as_u64[0] != |
| map_get_pfx_net (d0, vnet_buffer (p0)->map_t.v6.saddr, |
| src_port0) |
| || ip60->src_address.as_u64[1] != map_get_sfx_net (d0, |
| vnet_buffer |
| (p0)->map_t.v6.saddr, |
| src_port0)))) |
| { |
| error0 = MAP_ERROR_SEC_CHECK; |
| } |
| |
| if (PREDICT_FALSE |
| ((src_port1 != -1) |
| && (ip61->src_address.as_u64[0] != |
| map_get_pfx_net (d1, vnet_buffer (p1)->map_t.v6.saddr, |
| src_port1) |
| || ip61->src_address.as_u64[1] != map_get_sfx_net (d1, |
| vnet_buffer |
| (p1)->map_t.v6.saddr, |
| src_port1)))) |
| { |
| error1 = MAP_ERROR_SEC_CHECK; |
| } |
| |
| if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset && |
| !ip6_frag_hdr_offset ((ip6_frag_hdr_t *) |
| u8_ptr_add (ip60, |
| vnet_buffer |
| (p0)->map_t. |
| v6.frag_offset))) |
| && (src_port0 != -1) && (d0->ea_bits_len != 0 || !d0->rules) |
| && (error0 == MAP_ERROR_NONE)) |
| { |
| ip6_map_fragment_cache (ip60, |
| (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer |
| (p0)->map_t. |
| v6.frag_offset), |
| d0, src_port0); |
| } |
| |
| if (PREDICT_FALSE (vnet_buffer (p1)->map_t.v6.frag_offset && |
| !ip6_frag_hdr_offset ((ip6_frag_hdr_t *) |
| u8_ptr_add (ip61, |
| vnet_buffer |
| (p1)->map_t. |
| v6.frag_offset))) |
| && (src_port1 != -1) && (d1->ea_bits_len != 0 || !d1->rules) |
| && (error1 == MAP_ERROR_NONE)) |
| { |
| ip6_map_fragment_cache (ip61, |
| (ip6_frag_hdr_t *) u8_ptr_add (ip61, |
| vnet_buffer |
| (p1)->map_t. |
| v6.frag_offset), |
| d1, src_port1); |
| } |
| |
| if (PREDICT_TRUE |
| (error0 == MAP_ERROR_NONE && next0 != IP6_MAPT_NEXT_MAPT_ICMP)) |
| { |
| vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX, |
| cpu_index, |
| vnet_buffer (p0)-> |
| map_t.map_domain_index, 1, |
| clib_net_to_host_u16 |
| (ip60->payload_length)); |
| } |
| |
| if (PREDICT_TRUE |
| (error1 == MAP_ERROR_NONE && next1 != IP6_MAPT_NEXT_MAPT_ICMP)) |
| { |
| vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX, |
| cpu_index, |
| vnet_buffer (p1)-> |
| map_t.map_domain_index, 1, |
| clib_net_to_host_u16 |
| (ip61->payload_length)); |
| } |
| |
| next0 = (error0 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next0; |
| next1 = (error1 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next1; |
| p0->error = error_node->errors[error0]; |
| p1->error = error_node->errors[error1]; |
| vlib_validate_buffer_enqueue_x2 (vm, node, next_index, to_next, |
| n_left_to_next, pi0, pi1, next0, |
| next1); |
| } |
| #endif |
| |
| while (n_left_from > 0 && n_left_to_next > 0) |
| { |
| u32 pi0; |
| vlib_buffer_t *p0; |
| ip6_header_t *ip60; |
| u8 error0; |
| u32 l4_len0; |
| i32 src_port0; |
| map_domain_t *d0; |
| ip6_frag_hdr_t *frag0; |
| ip6_mapt_next_t next0 = 0; |
| u32 saddr; |
| |
| pi0 = to_next[0] = from[0]; |
| from += 1; |
| n_left_from -= 1; |
| to_next += 1; |
| n_left_to_next -= 1; |
| error0 = MAP_ERROR_NONE; |
| |
| p0 = vlib_get_buffer (vm, pi0); |
| ip60 = vlib_buffer_get_current (p0); |
| //Save saddr in a different variable to not overwrite ip.adj_index |
| saddr = map_get_ip4 (&ip60->src_address); |
| d0 = ip6_map_get_domain (vnet_buffer (p0)->ip.adj_index[VLIB_TX], |
| (ip4_address_t *) & saddr, |
| &vnet_buffer (p0)->map_t.map_domain_index, |
| &error0); |
| |
| //FIXME: What if d0 is null |
| vnet_buffer (p0)->map_t.v6.saddr = saddr; |
| vnet_buffer (p0)->map_t.v6.daddr = |
| ip6_map_t_embedded_address (d0, &ip60->dst_address); |
| vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0; |
| |
| if (PREDICT_FALSE (ip6_parse (ip60, p0->current_length, |
| &(vnet_buffer (p0)->map_t. |
| v6.l4_protocol), |
| &(vnet_buffer (p0)->map_t. |
| v6.l4_offset), |
| &(vnet_buffer (p0)->map_t. |
| v6.frag_offset)))) |
| { |
| error0 = MAP_ERROR_MALFORMED; |
| next0 = IP6_MAPT_NEXT_DROP; |
| } |
| |
| src_port0 = -1; |
| l4_len0 = (u32) clib_net_to_host_u16 (ip60->payload_length) + |
| sizeof (*ip60) - vnet_buffer (p0)->map_t.v6.l4_offset; |
| frag0 = |
| (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t. |
| v6.frag_offset); |
| |
| |
| if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset && |
| ip6_frag_hdr_offset (frag0))) |
| { |
| src_port0 = ip6_map_fragment_get (ip60, frag0, d0); |
| error0 = (src_port0 != -1) ? error0 : MAP_ERROR_FRAGMENT_MEMORY; |
| next0 = IP6_MAPT_NEXT_MAPT_FRAGMENTED; |
| } |
| else |
| if (PREDICT_TRUE |
| (vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_TCP)) |
| { |
| error0 = |
| l4_len0 < |
| sizeof (tcp_header_t) ? MAP_ERROR_MALFORMED : error0; |
| vnet_buffer (p0)->map_t.checksum_offset = |
| vnet_buffer (p0)->map_t.v6.l4_offset + 16; |
| next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP; |
| src_port0 = |
| (i32) * |
| ((u16 *) |
| u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset)); |
| } |
| else |
| if (PREDICT_TRUE |
| (vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_UDP)) |
| { |
| error0 = |
| l4_len0 < |
| sizeof (udp_header_t) ? MAP_ERROR_MALFORMED : error0; |
| vnet_buffer (p0)->map_t.checksum_offset = |
| vnet_buffer (p0)->map_t.v6.l4_offset + 6; |
| next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP; |
| src_port0 = |
| (i32) * |
| ((u16 *) |
| u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset)); |
| } |
| else if (vnet_buffer (p0)->map_t.v6.l4_protocol == |
| IP_PROTOCOL_ICMP6) |
| { |
| error0 = |
| l4_len0 < |
| sizeof (icmp46_header_t) ? MAP_ERROR_MALFORMED : error0; |
| next0 = IP6_MAPT_NEXT_MAPT_ICMP; |
| if (((icmp46_header_t *) |
| u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t.v6.l4_offset))->code == |
| ICMP6_echo_reply |
| || ((icmp46_header_t *) |
| u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t.v6. |
| l4_offset))->code == ICMP6_echo_request) |
| src_port0 = |
| (i32) * |
| ((u16 *) |
| u8_ptr_add (ip60, |
| vnet_buffer (p0)->map_t.v6.l4_offset + 6)); |
| } |
| else |
| { |
| //TODO: In case of 1:1 mapping, it might be possible to do something with those packets. |
| error0 = MAP_ERROR_BAD_PROTOCOL; |
| } |
| |
| //Security check |
| if (PREDICT_FALSE |
| ((src_port0 != -1) |
| && (ip60->src_address.as_u64[0] != |
| map_get_pfx_net (d0, vnet_buffer (p0)->map_t.v6.saddr, |
| src_port0) |
| || ip60->src_address.as_u64[1] != map_get_sfx_net (d0, |
| vnet_buffer |
| (p0)->map_t.v6.saddr, |
| src_port0)))) |
| { |
| //Security check when src_port0 is not zero (non-first fragment, UDP or TCP) |
| error0 = MAP_ERROR_SEC_CHECK; |
| } |
| |
| //Fragmented first packet needs to be cached for following packets |
| if (PREDICT_FALSE (vnet_buffer (p0)->map_t.v6.frag_offset && |
| !ip6_frag_hdr_offset ((ip6_frag_hdr_t *) |
| u8_ptr_add (ip60, |
| vnet_buffer |
| (p0)->map_t. |
| v6.frag_offset))) |
| && (src_port0 != -1) && (d0->ea_bits_len != 0 || !d0->rules) |
| && (error0 == MAP_ERROR_NONE)) |
| { |
| ip6_map_fragment_cache (ip60, |
| (ip6_frag_hdr_t *) u8_ptr_add (ip60, |
| vnet_buffer |
| (p0)->map_t. |
| v6.frag_offset), |
| d0, src_port0); |
| } |
| |
| if (PREDICT_TRUE |
| (error0 == MAP_ERROR_NONE && next0 != IP6_MAPT_NEXT_MAPT_ICMP)) |
| { |
| vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_RX, |
| cpu_index, |
| vnet_buffer (p0)-> |
| map_t.map_domain_index, 1, |
| clib_net_to_host_u16 |
| (ip60->payload_length)); |
| } |
| |
| next0 = (error0 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next0; |
| p0->error = error_node->errors[error0]; |
| vlib_validate_buffer_enqueue_x1 (vm, node, next_index, |
| to_next, n_left_to_next, pi0, |
| next0); |
| } |
| vlib_put_next_frame (vm, node, next_index, n_left_to_next); |
| } |
| return frame->n_vectors; |
| } |
| |
| static char *map_t_error_strings[] = { |
| #define _(sym,string) string, |
| foreach_map_error |
| #undef _ |
| }; |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE(ip6_map_t_fragmented_node) = { |
| .function = ip6_map_t_fragmented, |
| .name = "ip6-map-t-fragmented", |
| .vector_size = sizeof (u32), |
| .format_trace = format_map_trace, |
| .type = VLIB_NODE_TYPE_INTERNAL, |
| |
| .n_errors = MAP_N_ERROR, |
| .error_strings = map_t_error_strings, |
| |
| .n_next_nodes = IP6_MAPT_FRAGMENTED_N_NEXT, |
| .next_nodes = { |
| [IP6_MAPT_FRAGMENTED_NEXT_IP4_LOOKUP] = "ip4-lookup", |
| [IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME, |
| [IP6_MAPT_FRAGMENTED_NEXT_DROP] = "error-drop", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE(ip6_map_t_icmp_node) = { |
| .function = ip6_map_t_icmp, |
| .name = "ip6-map-t-icmp", |
| .vector_size = sizeof (u32), |
| .format_trace = format_map_trace, |
| .type = VLIB_NODE_TYPE_INTERNAL, |
| |
| .n_errors = MAP_N_ERROR, |
| .error_strings = map_t_error_strings, |
| |
| .n_next_nodes = IP6_MAPT_ICMP_N_NEXT, |
| .next_nodes = { |
| [IP6_MAPT_ICMP_NEXT_IP4_LOOKUP] = "ip4-lookup", |
| [IP6_MAPT_ICMP_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME, |
| [IP6_MAPT_ICMP_NEXT_DROP] = "error-drop", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE(ip6_map_t_tcp_udp_node) = { |
| .function = ip6_map_t_tcp_udp, |
| .name = "ip6-map-t-tcp-udp", |
| .vector_size = sizeof (u32), |
| .format_trace = format_map_trace, |
| .type = VLIB_NODE_TYPE_INTERNAL, |
| |
| .n_errors = MAP_N_ERROR, |
| .error_strings = map_t_error_strings, |
| |
| .n_next_nodes = IP6_MAPT_TCP_UDP_N_NEXT, |
| .next_nodes = { |
| [IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP] = "ip4-lookup", |
| [IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME, |
| [IP6_MAPT_TCP_UDP_NEXT_DROP] = "error-drop", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* *INDENT-OFF* */ |
| VLIB_REGISTER_NODE(ip6_map_t_node) = { |
| .function = ip6_map_t, |
| .name = "ip6-map-t", |
| .vector_size = sizeof(u32), |
| .format_trace = format_map_trace, |
| .type = VLIB_NODE_TYPE_INTERNAL, |
| |
| .n_errors = MAP_N_ERROR, |
| .error_strings = map_t_error_strings, |
| |
| .n_next_nodes = IP6_MAPT_N_NEXT, |
| .next_nodes = { |
| [IP6_MAPT_NEXT_MAPT_TCP_UDP] = "ip6-map-t-tcp-udp", |
| [IP6_MAPT_NEXT_MAPT_ICMP] = "ip6-map-t-icmp", |
| [IP6_MAPT_NEXT_MAPT_FRAGMENTED] = "ip6-map-t-fragmented", |
| [IP6_MAPT_NEXT_DROP] = "error-drop", |
| }, |
| }; |
| /* *INDENT-ON* */ |
| |
| /* |
| * fd.io coding-style-patch-verification: ON |
| * |
| * Local Variables: |
| * eval: (c-set-style "gnu") |
| * End: |
| */ |