X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fplugins%2Fmap%2Fip6_map_t.c;h=01bf0f9c281bdc14392715724b7d13663ca953a7;hb=f145c15631ba62e798395499f83a2f8a91ae83c7;hp=6e9c0d7640c46a348762c0cbd4874f109d64280d;hpb=640edcd9016f2381ea1efeaab78e834068c0e862;p=vpp.git diff --git a/src/plugins/map/ip6_map_t.c b/src/plugins/map/ip6_map_t.c index 6e9c0d7640c..01bf0f9c281 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, @@ -145,9 +149,11 @@ ip6_map_t_icmp (vlib_main_t * vm, d0 = pool_elt_at_index (map_main.domains, vnet_buffer (p0)->map_t.map_domain_index); - ctx0.sender_port = ip6_get_port (ip60, 0, p0->current_length); ctx0.d = d0; - if (ctx0.sender_port == 0) + ctx0.sender_port = 0; + if (!ip6_get_port + (vm, p0, ip60, p0->current_length, NULL, &ctx0.sender_port, + NULL, NULL, NULL, NULL)) { // In case of 1:1 mapping, we don't care about the port if (!(d0->ea_bits_len == 0 && d0->rules)) @@ -157,9 +163,8 @@ ip6_map_t_icmp (vlib_main_t * vm, } } - if (icmp6_to_icmp - (p0, ip6_to_ip4_set_icmp_cb, &ctx0, - ip6_to_ip4_set_inner_icmp_cb, &ctx0)) + if (icmp6_to_icmp (vm, p0, ip6_to_ip4_set_icmp_cb, &ctx0, + ip6_to_ip4_set_inner_icmp_cb, &ctx0)) { error0 = MAP_ERROR_ICMP; goto err0; @@ -169,9 +174,14 @@ ip6_map_t_icmp (vlib_main_t * vm, { // Send to fragmentation node if necessary vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; - vnet_buffer (p0)->ip_frag.next_index = IP4_FRAG_NEXT_IP4_LOOKUP; + 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)) { @@ -200,7 +210,7 @@ ip6_map_t_icmp (vlib_main_t * vm, * Translate IPv6 fragmented packet to IPv4. */ always_inline int -map_ip6_to_ip4_fragmented (vlib_buffer_t * p) +map_ip6_to_ip4_fragmented (vlib_main_t * vm, vlib_buffer_t * p) { ip6_header_t *ip6; ip6_frag_hdr_t *frag; @@ -214,7 +224,7 @@ map_ip6_to_ip4_fragmented (vlib_buffer_t * p) ip6 = vlib_buffer_get_current (p); if (ip6_parse - (ip6, p->current_length, &l4_protocol, &l4_offset, &frag_offset)) + (vm, p, ip6, p->current_length, &l4_protocol, &l4_offset, &frag_offset)) return -1; frag = (ip6_frag_hdr_t *) u8_ptr_add (ip6, frag_offset); @@ -230,7 +240,7 @@ map_ip6_to_ip4_fragmented (vlib_buffer_t * p) ip4->ip_version_and_header_length = IP4_VERSION_AND_HEADER_LENGTH_NO_OPTIONS; - ip4->tos = ip6_translate_tos (ip6); + ip4->tos = ip6_translate_tos (ip6->ip_version_traffic_class_and_flow_label); ip4->length = u16_net_add (ip6->payload_length, sizeof (*ip4) - l4_offset + sizeof (*ip6)); @@ -272,11 +282,10 @@ 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 (p0)) + if (map_ip6_to_ip4_fragmented (vm, p0)) { p0->error = error_node->errors[MAP_ERROR_FRAGMENT_DROPPED]; next0 = IP6_MAPT_FRAGMENTED_NEXT_DROP; @@ -288,9 +297,14 @@ ip6_map_t_fragmented (vlib_main_t * vm, // Send to fragmentation node if necessary vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; vnet_buffer (p0)->ip_frag.next_index = - IP4_FRAG_NEXT_IP4_LOOKUP; + 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, @@ -304,9 +318,12 @@ 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_buffer_t * p, bool udp_checksum) +map_ip6_to_ip4_tcp_udp (vlib_main_t * vm, vlib_buffer_t * p, + bool udp_checksum) { map_main_t *mm = &map_main; ip6_header_t *ip6; @@ -323,7 +340,7 @@ map_ip6_to_ip4_tcp_udp (vlib_buffer_t * p, bool udp_checksum) ip6 = vlib_buffer_get_current (p); if (ip6_parse - (ip6, p->current_length, &l4_protocol, &l4_offset, &frag_offset)) + (vm, p, ip6, p->current_length, &l4_protocol, &l4_offset, &frag_offset)) return -1; if (l4_protocol == IP_PROTOCOL_TCP) @@ -368,9 +385,19 @@ map_ip6_to_ip4_tcp_udp (vlib_buffer_t * p, bool udp_checksum) 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); + ip4->tos = ip6_translate_tos (ip6->ip_version_traffic_class_and_flow_label); ip4->length = u16_net_add (ip6->payload_length, sizeof (*ip4) + sizeof (*ip6) - l4_offset); @@ -429,7 +456,7 @@ ip6_map_t_tcp_udp (vlib_main_t * vm, p0 = vlib_get_buffer (vm, pi0); - if (map_ip6_to_ip4_tcp_udp (p0, true)) + if (map_ip6_to_ip4_tcp_udp (vm, p0, true)) { p0->error = error_node->errors[MAP_ERROR_UNKNOWN]; next0 = IP6_MAPT_TCP_UDP_NEXT_DROP; @@ -441,9 +468,14 @@ ip6_map_t_tcp_udp (vlib_main_t * vm, // Send to fragmentation node if necessary vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; vnet_buffer (p0)->ip_frag.next_index = - IP4_FRAG_NEXT_IP4_LOOKUP; + 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, @@ -461,6 +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; @@ -491,7 +524,7 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) n_left_to_next -= 1; error0 = MAP_ERROR_NONE; p0 = vlib_get_buffer (vm, pi0); - u16 l4_dst_port = vnet_buffer (p0)->ip.reass.l4_dst_port; + u16 l4_src_port = vnet_buffer (p0)->ip.reass.l4_src_port; ip60 = vlib_buffer_get_current (p0); @@ -512,7 +545,7 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) vnet_buffer (p0)->map_t.mtu = d0->mtu ? d0->mtu : ~0; if (PREDICT_FALSE - (ip6_parse (ip60, p0->current_length, + (ip6_parse (vm, p0, 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)))) @@ -534,7 +567,7 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) (vnet_buffer (p0)->map_t.v6.frag_offset && ip6_frag_hdr_offset (frag0))) { - map_port0 = l4_dst_port; + map_port0 = l4_src_port; next0 = IP6_MAPT_NEXT_MAPT_FRAGMENTED; } else @@ -547,7 +580,7 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) vnet_buffer (p0)->map_t.checksum_offset = vnet_buffer (p0)->map_t.v6.l4_offset + 16; next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP; - map_port0 = l4_dst_port; + map_port0 = l4_src_port; } else if (PREDICT_TRUE @@ -559,7 +592,7 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) vnet_buffer (p0)->map_t.checksum_offset = vnet_buffer (p0)->map_t.v6.l4_offset + 6; next0 = IP6_MAPT_NEXT_MAPT_TCP_UDP; - map_port0 = l4_dst_port; + map_port0 = l4_src_port; } else if (vnet_buffer (p0)->map_t.v6.l4_protocol == IP_PROTOCOL_ICMP6) @@ -576,7 +609,7 @@ ip6_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) u8_ptr_add (ip60, vnet_buffer (p0)->map_t.v6.l4_offset))-> code == ICMP6_echo_request) - map_port0 = l4_dst_port; + map_port0 = l4_src_port; } else { @@ -612,7 +645,19 @@ 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]; if (PREDICT_FALSE (p0->flags & VLIB_BUFFER_IS_TRACED)) { @@ -651,6 +696,7 @@ VLIB_REGISTER_NODE(ip6_map_t_fragmented_node) = { .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", }, @@ -672,6 +718,7 @@ VLIB_REGISTER_NODE(ip6_map_t_icmp_node) = { .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", }, @@ -693,6 +740,7 @@ VLIB_REGISTER_NODE(ip6_map_t_tcp_udp_node) = { .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", }, @@ -724,6 +772,7 @@ 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* */