X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fmap%2Fip6_map_t.c;h=861c049b0f4fd487bafd7d926a348b9163b12c85;hb=80f0b88fc388c82627dafef19c01f4c4536bbfa2;hp=95104dc78f48db4460c7834b047bc85af06950d7;hpb=f126e746fc01c75bc99329d10ce9127b26b23814;p=vpp.git diff --git a/src/plugins/map/ip6_map_t.c b/src/plugins/map/ip6_map_t.c index 95104dc78f4..861c049b0f4 100644 --- a/src/plugins/map/ip6_map_t.c +++ b/src/plugins/map/ip6_map_t.c @@ -24,12 +24,14 @@ typedef enum IP6_MAPT_NEXT_MAPT_ICMP, IP6_MAPT_NEXT_MAPT_FRAGMENTED, IP6_MAPT_NEXT_DROP, + IP6_MAPT_NEXT_ICMP, IP6_MAPT_N_NEXT } ip6_mapt_next_t; typedef enum { IP6_MAPT_ICMP_NEXT_IP4_LOOKUP, + IP6_MAPT_ICMP_NEXT_IP4_REWRITE, IP6_MAPT_ICMP_NEXT_IP4_FRAG, IP6_MAPT_ICMP_NEXT_DROP, IP6_MAPT_ICMP_N_NEXT @@ -38,6 +40,7 @@ typedef enum typedef enum { IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP, + IP6_MAPT_TCP_UDP_NEXT_IP4_REWRITE, IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG, IP6_MAPT_TCP_UDP_NEXT_DROP, IP6_MAPT_TCP_UDP_N_NEXT @@ -46,6 +49,7 @@ typedef enum typedef enum { IP6_MAPT_FRAGMENTED_NEXT_IP4_LOOKUP, + IP6_MAPT_FRAGMENTED_NEXT_IP4_REWRITE, IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG, IP6_MAPT_FRAGMENTED_NEXT_DROP, IP6_MAPT_FRAGMENTED_N_NEXT @@ -66,7 +70,7 @@ ip6_to_ip4_set_icmp_cb (ip6_header_t * ip6, ip4_header_t * ip4, void *arg) // Security check // Note that this prevents an intermediate IPv6 router from answering // the request. - ip4_sadr = map_get_ip4 (&ip6->src_address, ctx->d->flags); + ip4_sadr = map_get_ip4 (&ip6->src_address, ctx->d->ip6_src_len); if (ip6->src_address.as_u64[0] != map_get_pfx_net (ctx->d, ip4_sadr, ctx->sender_port) || ip6->src_address.as_u64[1] != map_get_sfx_net (ctx->d, ip4_sadr, @@ -88,7 +92,7 @@ ip6_to_ip4_set_inner_icmp_cb (ip6_header_t * ip6, ip4_header_t * ip4, u32 inner_ip4_dadr; //Security check of inner packet - inner_ip4_dadr = map_get_ip4 (&ip6->dst_address, ctx->d->flags); + inner_ip4_dadr = map_get_ip4 (&ip6->dst_address, ctx->d->ip6_src_len); if (ip6->dst_address.as_u64[0] != map_get_pfx_net (ctx->d, inner_ip4_dadr, ctx->sender_port) || ip6->dst_address.as_u64[1] != map_get_sfx_net (ctx->d, @@ -173,6 +177,11 @@ ip6_map_t_icmp (vlib_main_t * vm, vnet_buffer (p0)->ip_frag.next_index = IP_FRAG_NEXT_IP4_LOOKUP; next0 = IP6_MAPT_ICMP_NEXT_IP4_FRAG; } + else + { + next0 = ip6_map_ip4_lookup_bypass (p0, NULL) ? + IP6_MAPT_ICMP_NEXT_IP4_REWRITE : next0; + } err0: if (PREDICT_TRUE (error0 == MAP_ERROR_NONE)) { @@ -273,8 +282,7 @@ ip6_map_t_fragmented (vlib_main_t * vm, n_left_from -= 1; to_next += 1; n_left_to_next -= 1; - - next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_LOOKUP; + next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_LOOKUP; p0 = vlib_get_buffer (vm, pi0); if (map_ip6_to_ip4_fragmented (vm, p0)) @@ -292,6 +300,11 @@ ip6_map_t_fragmented (vlib_main_t * vm, IP_FRAG_NEXT_IP4_LOOKUP; next0 = IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG; } + else + { + next0 = ip6_map_ip4_lookup_bypass (p0, NULL) ? + IP6_MAPT_FRAGMENTED_NEXT_IP4_REWRITE : next0; + } } vlib_validate_buffer_enqueue_x1 (vm, node, next_index, @@ -305,6 +318,8 @@ ip6_map_t_fragmented (vlib_main_t * vm, /* * Translate IPv6 UDP/TCP packet to IPv4. + * Returns 0 on success. + * Returns a non-zero error code on error. */ always_inline int map_ip6_to_ip4_tcp_udp (vlib_main_t * vm, vlib_buffer_t * p, @@ -330,7 +345,7 @@ map_ip6_to_ip4_tcp_udp (vlib_main_t * vm, vlib_buffer_t * p, if (l4_protocol == IP_PROTOCOL_TCP) { - tcp_header_t *tcp = ip6_next_header (ip6); + tcp_header_t *tcp = (tcp_header_t *) u8_ptr_add (ip6, l4_offset); if (mm->tcp_mss > 0) { csum = tcp->checksum; @@ -341,7 +356,7 @@ map_ip6_to_ip4_tcp_udp (vlib_main_t * vm, vlib_buffer_t * p, } else { - udp_header_t *udp = ip6_next_header (ip6); + udp_header_t *udp = (udp_header_t *) u8_ptr_add (ip6, l4_offset); checksum = &udp->checksum; } @@ -370,6 +385,16 @@ map_ip6_to_ip4_tcp_udp (vlib_main_t * vm, vlib_buffer_t * p, ip4->dst_address.as_u32 = vnet_buffer (p)->map_t.v6.daddr; ip4->src_address.as_u32 = vnet_buffer (p)->map_t.v6.saddr; + /* + * Drop spoofed packets that from a known domain source. + */ + u32 map_domain_index = -1; + u8 error = 0; + + ip4_map_get_domain (&ip4->src_address, &map_domain_index, &error); + if (error) + return error; + ip4->ip_version_and_header_length = IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; ip4->tos = ip6_translate_tos (ip6->ip_version_traffic_class_and_flow_label); @@ -446,6 +471,11 @@ ip6_map_t_tcp_udp (vlib_main_t * vm, IP_FRAG_NEXT_IP4_LOOKUP; next0 = IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG; } + else + { + next0 = ip6_map_ip4_lookup_bypass (p0, NULL) ? + IP6_MAPT_TCP_UDP_NEXT_IP4_REWRITE : next0; + } } vlib_validate_buffer_enqueue_x1 (vm, node, next_index, @@ -463,6 +493,7 @@ 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); + map_main_t *mm = &map_main; vlib_combined_counter_main_t *cm = map_main.domain_counters; u32 thread_index = vm->thread_index; @@ -513,6 +544,18 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) ip6_map_t_embedded_address (d0, &ip60->dst_address); vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0; + map_port0 = -1; + + if (PREDICT_FALSE (ip60->hop_limit == 1)) + { + icmp6_error_set_vnet_buffer (p0, ICMP6_time_exceeded, + ICMP6_time_exceeded_ttl_exceeded_in_transit, + 0); + p0->error = error_node->errors[MAP_ERROR_TIME_EXCEEDED]; + next0 = IP6_MAPT_NEXT_ICMP; + goto trace; + } + if (PREDICT_FALSE (ip6_parse (vm, p0, ip60, p0->current_length, &(vnet_buffer (p0)->map_t.v6.l4_protocol), @@ -523,7 +566,6 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) error0 == MAP_ERROR_NONE ? MAP_ERROR_MALFORMED : error0; } - map_port0 = -1; l4_len0 = (u32) clib_net_to_host_u16 (ip60->payload_length) + sizeof (*ip60) - vnet_buffer (p0)->map_t.v6.l4_offset; @@ -572,12 +614,12 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) next0 = IP6_MAPT_NEXT_MAPT_ICMP; if (((icmp46_header_t *) u8_ptr_add (ip60, - vnet_buffer (p0)->map_t.v6.l4_offset))->code == + vnet_buffer (p0)->map_t.v6.l4_offset))->type == ICMP6_echo_reply || ((icmp46_header_t *) u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset))-> - code == ICMP6_echo_request) + type == ICMP6_echo_request) map_port0 = l4_src_port; } else @@ -614,8 +656,21 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) payload_length)); } - next0 = (error0 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next0; + if (PREDICT_FALSE + (error0 == MAP_ERROR_SEC_CHECK && mm->icmp6_enabled)) + { + icmp6_error_set_vnet_buffer (p0, ICMP6_destination_unreachable, + ICMP6_destination_unreachable_source_address_failed_policy, + 0); + next0 = IP6_MAPT_NEXT_ICMP; + } + else + { + next0 = (error0 != MAP_ERROR_NONE) ? IP6_MAPT_NEXT_DROP : next0; + } + p0->error = error_node->errors[error0]; + trace: if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED)) { map_add_trace (vm, node, p0, @@ -632,12 +687,6 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) 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, @@ -647,12 +696,13 @@ VLIB_REGISTER_NODE(ip6_map_t_fragmented_node) = { .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = MAP_N_ERROR, - .error_strings = map_t_error_strings, + .error_counters = map_error_counters, .n_next_nodes = IP6_MAPT_FRAGMENTED_N_NEXT, .next_nodes = { [IP6_MAPT_FRAGMENTED_NEXT_IP4_LOOKUP] = "ip4-lookup", + [IP6_MAPT_FRAGMENTED_NEXT_IP4_REWRITE] = "ip4-load-balance", [IP6_MAPT_FRAGMENTED_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME, [IP6_MAPT_FRAGMENTED_NEXT_DROP] = "error-drop", }, @@ -668,12 +718,13 @@ VLIB_REGISTER_NODE(ip6_map_t_icmp_node) = { .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = MAP_N_ERROR, - .error_strings = map_t_error_strings, + .error_counters = map_error_counters, .n_next_nodes = IP6_MAPT_ICMP_N_NEXT, .next_nodes = { [IP6_MAPT_ICMP_NEXT_IP4_LOOKUP] = "ip4-lookup", + [IP6_MAPT_ICMP_NEXT_IP4_REWRITE] = "ip4-load-balance", [IP6_MAPT_ICMP_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME, [IP6_MAPT_ICMP_NEXT_DROP] = "error-drop", }, @@ -689,12 +740,13 @@ VLIB_REGISTER_NODE(ip6_map_t_tcp_udp_node) = { .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = MAP_N_ERROR, - .error_strings = map_t_error_strings, + .error_counters = map_error_counters, .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_REWRITE] = "ip4-load-balance", [IP6_MAPT_TCP_UDP_NEXT_IP4_FRAG] = IP4_FRAG_NODE_NAME, [IP6_MAPT_TCP_UDP_NEXT_DROP] = "error-drop", }, @@ -717,7 +769,7 @@ VLIB_REGISTER_NODE(ip6_map_t_node) = { .type = VLIB_NODE_TYPE_INTERNAL, .n_errors = MAP_N_ERROR, - .error_strings = map_t_error_strings, + .error_counters = map_error_counters, .n_next_nodes = IP6_MAPT_N_NEXT, .next_nodes = @@ -726,6 +778,7 @@ VLIB_REGISTER_NODE(ip6_map_t_node) = { [IP6_MAPT_NEXT_MAPT_ICMP] = "ip6-map-t-icmp", [IP6_MAPT_NEXT_MAPT_FRAGMENTED] = "ip6-map-t-fragmented", [IP6_MAPT_NEXT_DROP] = "error-drop", + [IP6_MAPT_NEXT_ICMP] = "ip6-icmp-error", }, }; /* *INDENT-ON* */