diff options
Diffstat (limited to 'src/vnet/map/ip4_map_t.c')
| -rw-r--r-- | src/vnet/map/ip4_map_t.c | 820 |
1 files changed, 133 insertions, 687 deletions
diff --git a/src/vnet/map/ip4_map_t.c b/src/vnet/map/ip4_map_t.c index 5f2bcbf970a..b89840ccfaf 100644 --- a/src/vnet/map/ip4_map_t.c +++ b/src/vnet/map/ip4_map_t.c @@ -15,6 +15,7 @@ #include "map.h" #include "../ip/ip_frag.h" +#include <vnet/ip/ip4_to_ip6.h> #define IP4_MAP_T_DUAL_LOOP 1 @@ -63,18 +64,6 @@ typedef CLIB_PACKED (struct { }) ip4_mapt_pseudo_header_t; /* *INDENT-ON* */ -#define frag_id_4to6(id) (id) - -//TODO: Find the right place in memory for this. -/* *INDENT-OFF* */ -static u8 icmp_to_icmp6_updater_pointer_table[] = - { 0, 1, 4, 4, ~0, - ~0, ~0, ~0, 7, 6, - ~0, ~0, 8, 8, 8, - 8, 24, 24, 24, 24 - }; -/* *INDENT-ON* */ - static_always_inline int ip4_map_fragment_cache (ip4_header_t * ip4, u16 port) @@ -110,360 +99,41 @@ ip4_map_fragment_get_port (ip4_header_t * ip4) return ret; } - -/* Statelessly translates an ICMP packet into ICMPv6. - * - * Warning: The checksum will need to be recomputed. - * - */ -static_always_inline int -ip4_icmp_to_icmp6_in_place (icmp46_header_t * icmp, u32 icmp_len, - i32 * receiver_port, ip4_header_t ** inner_ip4) +typedef struct { - *inner_ip4 = NULL; - switch (icmp->type) - { - case ICMP4_echo_reply: - *receiver_port = ((u16 *) icmp)[2]; - icmp->type = ICMP6_echo_reply; - break; - case ICMP4_echo_request: - *receiver_port = ((u16 *) icmp)[2]; - icmp->type = ICMP6_echo_request; - break; - case ICMP4_destination_unreachable: - *inner_ip4 = (ip4_header_t *) (((u8 *) icmp) + 8); - *receiver_port = ip4_get_port (*inner_ip4, MAP_SENDER, icmp_len - 8); - - switch (icmp->code) - { - case ICMP4_destination_unreachable_destination_unreachable_net: //0 - case ICMP4_destination_unreachable_destination_unreachable_host: //1 - icmp->type = ICMP6_destination_unreachable; - icmp->code = ICMP6_destination_unreachable_no_route_to_destination; - break; - case ICMP4_destination_unreachable_protocol_unreachable: //2 - icmp->type = ICMP6_parameter_problem; - icmp->code = ICMP6_parameter_problem_unrecognized_next_header; - break; - case ICMP4_destination_unreachable_port_unreachable: //3 - icmp->type = ICMP6_destination_unreachable; - icmp->code = ICMP6_destination_unreachable_port_unreachable; - break; - case ICMP4_destination_unreachable_fragmentation_needed_and_dont_fragment_set: //4 - icmp->type = - ICMP6_packet_too_big; - icmp->code = 0; - { - u32 advertised_mtu = clib_net_to_host_u32 (*((u32 *) (icmp + 1))); - if (advertised_mtu) - advertised_mtu += 20; - else - advertised_mtu = 1000; //FIXME ! (RFC 1191 - plateau value) - - //FIXME: = minimum(advertised MTU+20, MTU_of_IPv6_nexthop, (MTU_of_IPv4_nexthop)+20) - *((u32 *) (icmp + 1)) = clib_host_to_net_u32 (advertised_mtu); - } - break; - - case ICMP4_destination_unreachable_source_route_failed: //5 - case ICMP4_destination_unreachable_destination_network_unknown: //6 - case ICMP4_destination_unreachable_destination_host_unknown: //7 - case ICMP4_destination_unreachable_source_host_isolated: //8 - case ICMP4_destination_unreachable_network_unreachable_for_type_of_service: //11 - case ICMP4_destination_unreachable_host_unreachable_for_type_of_service: //12 - icmp->type = - ICMP6_destination_unreachable; - icmp->code = ICMP6_destination_unreachable_no_route_to_destination; - break; - case ICMP4_destination_unreachable_network_administratively_prohibited: //9 - case ICMP4_destination_unreachable_host_administratively_prohibited: //10 - case ICMP4_destination_unreachable_communication_administratively_prohibited: //13 - case ICMP4_destination_unreachable_precedence_cutoff_in_effect: //15 - icmp->type = ICMP6_destination_unreachable; - icmp->code = - ICMP6_destination_unreachable_destination_administratively_prohibited; - break; - case ICMP4_destination_unreachable_host_precedence_violation: //14 - default: - return -1; - } - break; - - case ICMP4_time_exceeded: //11 - *inner_ip4 = (ip4_header_t *) (((u8 *) icmp) + 8); - *receiver_port = ip4_get_port (*inner_ip4, MAP_SENDER, icmp_len - 8); - icmp->type = ICMP6_time_exceeded; - //icmp->code = icmp->code //unchanged - break; + map_domain_t *d; + u16 recv_port; +} icmp_to_icmp6_ctx_t; - case ICMP4_parameter_problem: - *inner_ip4 = (ip4_header_t *) (((u8 *) icmp) + 8); - *receiver_port = ip4_get_port (*inner_ip4, MAP_SENDER, icmp_len - 8); +static int +ip4_to_ip6_set_icmp_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *arg) +{ + icmp_to_icmp6_ctx_t *ctx = arg; - switch (icmp->code) - { - case ICMP4_parameter_problem_pointer_indicates_error: - case ICMP4_parameter_problem_bad_length: - icmp->type = ICMP6_parameter_problem; - icmp->code = ICMP6_parameter_problem_erroneous_header_field; - { - u8 ptr = - icmp_to_icmp6_updater_pointer_table[*((u8 *) (icmp + 1))]; - if (ptr == 0xff) - return -1; - - *((u32 *) (icmp + 1)) = clib_host_to_net_u32 (ptr); - } - break; - default: - //All other codes cause dropping the packet - return -1; - } - break; + ip4_map_t_embedded_address (ctx->d, &ip6->src_address, &ip4->src_address); + ip6->dst_address.as_u64[0] = + map_get_pfx_net (ctx->d, ip4->dst_address.as_u32, ctx->recv_port); + ip6->dst_address.as_u64[1] = + map_get_sfx_net (ctx->d, ip4->dst_address.as_u32, ctx->recv_port); - default: - //All other types cause dropping the packet - return -1; - break; - } return 0; } -static_always_inline void -_ip4_map_t_icmp (map_domain_t * d, vlib_buffer_t * p, u8 * error) +static int +ip4_to_ip6_set_inner_icmp_cb (ip4_header_t * ip4, ip6_header_t * ip6, + void *arg) { - ip4_header_t *ip4, *inner_ip4; - ip6_header_t *ip6, *inner_ip6; - u32 ip_len; - icmp46_header_t *icmp; - i32 recv_port; - ip_csum_t csum; - u16 *inner_L4_checksum = 0; - ip6_frag_hdr_t *inner_frag; - u32 inner_frag_id; - u32 inner_frag_offset; - u8 inner_frag_more; - - ip4 = vlib_buffer_get_current (p); - ip_len = clib_net_to_host_u16 (ip4->length); - ASSERT (ip_len <= p->current_length); - - icmp = (icmp46_header_t *) (ip4 + 1); - if (ip4_icmp_to_icmp6_in_place (icmp, ip_len - sizeof (*ip4), - &recv_port, &inner_ip4)) - { - *error = MAP_ERROR_ICMP; - return; - } - - if (recv_port < 0) - { - // In case of 1:1 mapping, we don't care about the port - if (d->ea_bits_len == 0 && d->rules) - { - recv_port = 0; - } - else - { - *error = MAP_ERROR_ICMP; - return; - } - } - - if (inner_ip4) - { - //We have 2 headers to translate. - //We need to make some room in the middle of the packet - - if (PREDICT_FALSE (ip4_is_fragment (inner_ip4))) - { - //Here it starts getting really tricky - //We will add a fragmentation header in the inner packet - - if (!ip4_is_first_fragment (inner_ip4)) - { - //For now we do not handle unless it is the first fragment - //Ideally we should handle the case as we are in slow path already - *error = MAP_ERROR_FRAGMENTED; - return; - } - - vlib_buffer_advance (p, - -2 * (sizeof (*ip6) - sizeof (*ip4)) - - sizeof (*inner_frag)); - ip6 = vlib_buffer_get_current (p); - clib_memcpy (u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)), ip4, - 20 + 8); - ip4 = - (ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)); - icmp = (icmp46_header_t *) (ip4 + 1); - - inner_ip6 = - (ip6_header_t *) u8_ptr_add (inner_ip4, - sizeof (*ip4) - sizeof (*ip6) - - sizeof (*inner_frag)); - inner_frag = - (ip6_frag_hdr_t *) u8_ptr_add (inner_ip6, sizeof (*inner_ip6)); - ip6->payload_length = - u16_net_add (ip4->length, - sizeof (*ip6) - 2 * sizeof (*ip4) + - sizeof (*inner_frag)); - inner_frag_id = frag_id_4to6 (inner_ip4->fragment_id); - inner_frag_offset = ip4_get_fragment_offset (inner_ip4); - inner_frag_more = - ! !(inner_ip4->flags_and_fragment_offset & - clib_net_to_host_u16 (IP4_HEADER_FLAG_MORE_FRAGMENTS)); - } - else - { - vlib_buffer_advance (p, -2 * (sizeof (*ip6) - sizeof (*ip4))); - ip6 = vlib_buffer_get_current (p); - clib_memcpy (u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)), ip4, - 20 + 8); - ip4 = - (ip4_header_t *) u8_ptr_add (ip6, sizeof (*ip6) - sizeof (*ip4)); - icmp = (icmp46_header_t *) u8_ptr_add (ip4, sizeof (*ip4)); - inner_ip6 = - (ip6_header_t *) u8_ptr_add (inner_ip4, - sizeof (*ip4) - sizeof (*ip6)); - ip6->payload_length = - u16_net_add (ip4->length, sizeof (*ip6) - 2 * sizeof (*ip4)); - inner_frag = NULL; - } - - if (PREDICT_TRUE (inner_ip4->protocol == IP_PROTOCOL_TCP)) - { - inner_L4_checksum = &((tcp_header_t *) (inner_ip4 + 1))->checksum; - *inner_L4_checksum = - ip_csum_fold (ip_csum_sub_even - (*inner_L4_checksum, - *((u64 *) (&inner_ip4->src_address)))); - } - else if (PREDICT_TRUE (inner_ip4->protocol == IP_PROTOCOL_UDP)) - { - inner_L4_checksum = &((udp_header_t *) (inner_ip4 + 1))->checksum; - if (!*inner_L4_checksum) - { - //The inner packet was first translated, and therefore came from IPv6. - //As the packet was an IPv6 packet, the UDP checksum can't be NULL - *error = MAP_ERROR_ICMP; - return; - } - *inner_L4_checksum = - ip_csum_fold (ip_csum_sub_even - (*inner_L4_checksum, - *((u64 *) (&inner_ip4->src_address)))); - } - else if (inner_ip4->protocol == IP_PROTOCOL_ICMP) - { - //We have an ICMP inside an ICMP - //It needs to be translated, but not for error ICMP messages - icmp46_header_t *inner_icmp = (icmp46_header_t *) (inner_ip4 + 1); - csum = inner_icmp->checksum; - //Only types ICMP4_echo_request and ICMP4_echo_reply are handled by ip4_icmp_to_icmp6_in_place - csum = ip_csum_sub_even (csum, *((u16 *) inner_icmp)); - inner_icmp->type = (inner_icmp->type == ICMP4_echo_request) ? - ICMP6_echo_request : ICMP6_echo_reply; - csum = ip_csum_add_even (csum, *((u16 *) inner_icmp)); - csum = - ip_csum_add_even (csum, clib_host_to_net_u16 (IP_PROTOCOL_ICMP6)); - csum = - ip_csum_add_even (csum, inner_ip4->length - sizeof (*inner_ip4)); - inner_icmp->checksum = ip_csum_fold (csum); - inner_L4_checksum = &inner_icmp->checksum; - inner_ip4->protocol = IP_PROTOCOL_ICMP6; - } - else - { - /* To shut up Coverity */ - os_panic (); - } - - //FIXME: Security check with the port found in the inner packet - - csum = *inner_L4_checksum; //Initial checksum of the inner L4 header - //FIXME: Shouldn't we remove ip addresses from there ? - - inner_ip6->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 ((6 << 28) + (inner_ip4->tos << 20)); - inner_ip6->payload_length = - u16_net_add (inner_ip4->length, -sizeof (*inner_ip4)); - inner_ip6->hop_limit = inner_ip4->ttl; - inner_ip6->protocol = inner_ip4->protocol; + icmp_to_icmp6_ctx_t *ctx = arg; - //Note that the source address is within the domain - //while the destination address is the one outside the domain - ip4_map_t_embedded_address (d, &inner_ip6->dst_address, - &inner_ip4->dst_address); - inner_ip6->src_address.as_u64[0] = - map_get_pfx_net (d, inner_ip4->src_address.as_u32, recv_port); - inner_ip6->src_address.as_u64[1] = - map_get_sfx_net (d, inner_ip4->src_address.as_u32, recv_port); + //Note that the source address is within the domain + //while the destination address is the one outside the domain + ip4_map_t_embedded_address (ctx->d, &ip6->dst_address, &ip4->dst_address); + ip6->src_address.as_u64[0] = + map_get_pfx_net (ctx->d, ip4->src_address.as_u32, ctx->recv_port); + ip6->src_address.as_u64[1] = + map_get_sfx_net (ctx->d, ip4->src_address.as_u32, ctx->recv_port); - if (PREDICT_FALSE (inner_frag != NULL)) - { - inner_frag->next_hdr = inner_ip6->protocol; - inner_frag->identification = inner_frag_id; - inner_frag->rsv = 0; - inner_frag->fragment_offset_and_more = - ip6_frag_hdr_offset_and_more (inner_frag_offset, inner_frag_more); - inner_ip6->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION; - inner_ip6->payload_length = - clib_host_to_net_u16 (clib_net_to_host_u16 - (inner_ip6->payload_length) + - sizeof (*inner_frag)); - } - - csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[0]); - csum = ip_csum_add_even (csum, inner_ip6->src_address.as_u64[1]); - csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[0]); - csum = ip_csum_add_even (csum, inner_ip6->dst_address.as_u64[1]); - *inner_L4_checksum = ip_csum_fold (csum); - - } - else - { - vlib_buffer_advance (p, sizeof (*ip4) - sizeof (*ip6)); - ip6 = vlib_buffer_get_current (p); - ip6->payload_length = - clib_host_to_net_u16 (clib_net_to_host_u16 (ip4->length) - - sizeof (*ip4)); - } - - //Translate outer IPv6 - ip6->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 ((6 << 28) + (ip4->tos << 20)); - - ip6->hop_limit = ip4->ttl; - ip6->protocol = IP_PROTOCOL_ICMP6; - - ip4_map_t_embedded_address (d, &ip6->src_address, &ip4->src_address); - ip6->dst_address.as_u64[0] = - map_get_pfx_net (d, ip4->dst_address.as_u32, recv_port); - ip6->dst_address.as_u64[1] = - map_get_sfx_net (d, ip4->dst_address.as_u32, recv_port); - - //Truncate when the packet exceeds the minimal IPv6 MTU - if (p->current_length > 1280) - { - ip6->payload_length = clib_host_to_net_u16 (1280 - sizeof (*ip6)); - p->current_length = 1280; //Looks too simple to be correct... - } - - //TODO: We could do an easy diff-checksum for echo requests/replies - //Recompute ICMP checksum - icmp->checksum = 0; - csum = ip_csum_with_carry (0, ip6->payload_length); - csum = ip_csum_with_carry (csum, clib_host_to_net_u16 (ip6->protocol)); - csum = ip_csum_with_carry (csum, ip6->src_address.as_u64[0]); - csum = ip_csum_with_carry (csum, ip6->src_address.as_u64[1]); - csum = ip_csum_with_carry (csum, ip6->dst_address.as_u64[0]); - csum = ip_csum_with_carry (csum, ip6->dst_address.as_u64[1]); - csum = - ip_incremental_checksum (csum, icmp, - clib_net_to_host_u16 (ip6->payload_length)); - icmp->checksum = ~ip_csum_fold (csum); + return 0; } static uword @@ -491,6 +161,8 @@ ip4_map_t_icmp (vlib_main_t * vm, u8 error0; map_domain_t *d0; u16 len0; + icmp_to_icmp6_ctx_t ctx0; + ip4_header_t *ip40; next0 = IP4_MAPT_ICMP_NEXT_IP6_LOOKUP; pi0 = to_next[0] = from[0]; @@ -508,7 +180,27 @@ ip4_map_t_icmp (vlib_main_t * vm, d0 = pool_elt_at_index (map_main.domains, vnet_buffer (p0)->map_t.map_domain_index); - _ip4_map_t_icmp (d0, p0, &error0); + + ip40 = vlib_buffer_get_current (p0); + ctx0.recv_port = ip4_get_port (ip40, 1); + ctx0.d = d0; + if (ctx0.recv_port == 0) + { + // In case of 1:1 mapping, we don't care about the port + if (!(d0->ea_bits_len == 0 && d0->rules)) + { + error0 = MAP_ERROR_ICMP; + goto err0; + } + } + + if (icmp_to_icmp6 + (p0, ip4_to_ip6_set_icmp_cb, &ctx0, + ip4_to_ip6_set_inner_icmp_cb, &ctx0)) + { + error0 = MAP_ERROR_ICMP; + goto err0; + } if (vnet_buffer (p0)->map_t.mtu < p0->current_length) { @@ -517,12 +209,14 @@ ip4_map_t_icmp (vlib_main_t * vm, vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP; next0 = IP4_MAPT_ICMP_NEXT_IP6_FRAG; } + err0: if (PREDICT_TRUE (error0 == MAP_ERROR_NONE)) { vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX, thread_index, - vnet_buffer (p0)->map_t. - map_domain_index, 1, len0); + vnet_buffer (p0)-> + map_t.map_domain_index, 1, + len0); } else { @@ -538,6 +232,19 @@ ip4_map_t_icmp (vlib_main_t * vm, return frame->n_vectors; } +static int +ip4_to_ip6_set_cb (ip4_header_t * ip4, ip6_header_t * ip6, void *ctx) +{ + ip4_mapt_pseudo_header_t *pheader = ctx; + + ip6->dst_address.as_u64[0] = pheader->daddr.as_u64[0]; + ip6->dst_address.as_u64[1] = pheader->daddr.as_u64[1]; + ip6->src_address.as_u64[0] = pheader->saddr.as_u64[0]; + ip6->src_address.as_u64[1] = pheader->saddr.as_u64[1]; + + return 0; +} + static uword ip4_map_t_fragmented (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) @@ -546,6 +253,8 @@ ip4_map_t_fragmented (vlib_main_t * vm, from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; + vlib_node_runtime_t *error_node = + vlib_node_get_runtime (vm, ip4_map_t_fragmented_node.index); while (n_left_from > 0) { @@ -555,9 +264,6 @@ ip4_map_t_fragmented (vlib_main_t * vm, { u32 pi0; vlib_buffer_t *p0; - ip4_header_t *ip40; - ip6_header_t *ip60; - ip6_frag_hdr_t *frag0; ip4_mapt_pseudo_header_t *pheader0; ip4_mapt_fragmented_next_t next0; @@ -574,50 +280,21 @@ ip4_map_t_fragmented (vlib_main_t * vm, pheader0 = vlib_buffer_get_current (p0); vlib_buffer_advance (p0, sizeof (*pheader0)); - //Accessing ip4 header - ip40 = vlib_buffer_get_current (p0); - frag0 = - (ip6_frag_hdr_t *) u8_ptr_add (ip40, - sizeof (*ip40) - sizeof (*frag0)); - ip60 = - (ip6_header_t *) u8_ptr_add (ip40, - sizeof (*ip40) - sizeof (*frag0) - - sizeof (*ip60)); - vlib_buffer_advance (p0, - sizeof (*ip40) - sizeof (*ip60) - - sizeof (*frag0)); - - //We know that the protocol was one of ICMP, TCP or UDP - //because the first fragment was found and cached - frag0->next_hdr = - (ip40->protocol == - IP_PROTOCOL_ICMP) ? IP_PROTOCOL_ICMP6 : ip40->protocol; - frag0->identification = frag_id_4to6 (ip40->fragment_id); - frag0->rsv = 0; - frag0->fragment_offset_and_more = - ip6_frag_hdr_offset_and_more (ip4_get_fragment_offset (ip40), - clib_net_to_host_u16 - (ip40->flags_and_fragment_offset) & - IP4_HEADER_FLAG_MORE_FRAGMENTS); - - ip60->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20)); - ip60->payload_length = - clib_host_to_net_u16 (clib_net_to_host_u16 (ip40->length) - - sizeof (*ip40) + sizeof (*frag0)); - ip60->hop_limit = ip40->ttl; - ip60->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION; - ip60->dst_address.as_u64[0] = pheader0->daddr.as_u64[0]; - ip60->dst_address.as_u64[1] = pheader0->daddr.as_u64[1]; - ip60->src_address.as_u64[0] = pheader0->saddr.as_u64[0]; - ip60->src_address.as_u64[1] = pheader0->saddr.as_u64[1]; - - if (vnet_buffer (p0)->map_t.mtu < p0->current_length) + if (ip4_to_ip6_fragmented (p0, ip4_to_ip6_set_cb, pheader0)) { - vnet_buffer (p0)->ip_frag.header_offset = 0; - vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; - vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP; - next0 = IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG; + p0->error = error_node->errors[MAP_ERROR_FRAGMENT_DROPPED]; + next0 = IP4_MAPT_FRAGMENTED_NEXT_DROP; + } + else + { + if (vnet_buffer (p0)->map_t.mtu < p0->current_length) + { + vnet_buffer (p0)->ip_frag.header_offset = 0; + vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; + vnet_buffer (p0)->ip_frag.next_index = + IP6_FRAG_NEXT_IP6_LOOKUP; + next0 = IP4_MAPT_FRAGMENTED_NEXT_IP6_FRAG; + } } vlib_validate_buffer_enqueue_x1 (vm, node, next_index, @@ -637,6 +314,9 @@ ip4_map_t_tcp_udp (vlib_main_t * vm, from = vlib_frame_vector_args (frame); n_left_from = frame->n_vectors; next_index = node->cached_next_index; + vlib_node_runtime_t *error_node = + vlib_node_get_runtime (vm, ip4_map_t_tcp_udp_node.index); + while (n_left_from > 0) { @@ -647,12 +327,6 @@ ip4_map_t_tcp_udp (vlib_main_t * vm, { u32 pi0, pi1; vlib_buffer_t *p0, *p1; - ip4_header_t *ip40, *ip41; - ip6_header_t *ip60, *ip61; - ip_csum_t csum0, csum1; - u16 *checksum0, *checksum1; - ip6_frag_hdr_t *frag0, *frag1; - u32 frag_id0, frag_id1; ip4_mapt_pseudo_header_t *pheader0, *pheader1; ip4_mapt_tcp_udp_next_t next0, next1; @@ -674,183 +348,40 @@ ip4_map_t_tcp_udp (vlib_main_t * vm, vlib_buffer_advance (p0, sizeof (*pheader0)); vlib_buffer_advance (p1, sizeof (*pheader1)); - //Accessing ip4 header - ip40 = vlib_buffer_get_current (p0); - ip41 = vlib_buffer_get_current (p1); - checksum0 = - (u16 *) u8_ptr_add (ip40, - vnet_buffer (p0)->map_t.checksum_offset); - checksum1 = - (u16 *) u8_ptr_add (ip41, - vnet_buffer (p1)->map_t.checksum_offset); - - //UDP checksum is optional over IPv4 but mandatory for IPv6 - //We do not check udp->length sanity but use our safe computed value instead - if (PREDICT_FALSE - (!*checksum0 && ip40->protocol == IP_PROTOCOL_UDP)) + if (ip4_to_ip6_tcp_udp (p0, ip4_to_ip6_set_cb, pheader0)) { - u16 udp_len = - clib_host_to_net_u16 (ip40->length) - sizeof (*ip40); - udp_header_t *udp = - (udp_header_t *) u8_ptr_add (ip40, sizeof (*ip40)); - ip_csum_t csum; - csum = ip_incremental_checksum (0, udp, udp_len); - csum = - ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len)); - csum = - ip_csum_with_carry (csum, - clib_host_to_net_u16 (IP_PROTOCOL_UDP)); - csum = - ip_csum_with_carry (csum, *((u64 *) (&ip40->src_address))); - *checksum0 = ~ip_csum_fold (csum); - } - if (PREDICT_FALSE - (!*checksum1 && ip41->protocol == IP_PROTOCOL_UDP)) - { - u16 udp_len = - clib_host_to_net_u16 (ip41->length) - sizeof (*ip40); - udp_header_t *udp = - (udp_header_t *) u8_ptr_add (ip41, sizeof (*ip40)); - ip_csum_t csum; - csum = ip_incremental_checksum (0, udp, udp_len); - csum = - ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len)); - csum = - ip_csum_with_carry (csum, - clib_host_to_net_u16 (IP_PROTOCOL_UDP)); - csum = - ip_csum_with_carry (csum, *((u64 *) (&ip41->src_address))); - *checksum1 = ~ip_csum_fold (csum); - } - - csum0 = ip_csum_sub_even (*checksum0, ip40->src_address.as_u32); - csum1 = ip_csum_sub_even (*checksum1, ip41->src_address.as_u32); - csum0 = ip_csum_sub_even (csum0, ip40->dst_address.as_u32); - csum1 = ip_csum_sub_even (csum1, ip41->dst_address.as_u32); - - // Deal with fragmented packets - if (PREDICT_FALSE (ip40->flags_and_fragment_offset & - clib_host_to_net_u16 - (IP4_HEADER_FLAG_MORE_FRAGMENTS))) - { - ip60 = - (ip6_header_t *) u8_ptr_add (ip40, - sizeof (*ip40) - sizeof (*ip60) - - sizeof (*frag0)); - frag0 = - (ip6_frag_hdr_t *) u8_ptr_add (ip40, - sizeof (*ip40) - - sizeof (*frag0)); - frag_id0 = frag_id_4to6 (ip40->fragment_id); - vlib_buffer_advance (p0, - sizeof (*ip40) - sizeof (*ip60) - - sizeof (*frag0)); + p0->error = error_node->errors[MAP_ERROR_UNKNOWN]; + next0 = IP4_MAPT_TCP_UDP_NEXT_DROP; } else { - ip60 = - (ip6_header_t *) (((u8 *) ip40) + sizeof (*ip40) - - sizeof (*ip60)); - vlib_buffer_advance (p0, sizeof (*ip40) - sizeof (*ip60)); - frag0 = NULL; + if (vnet_buffer (p0)->map_t.mtu < p0->current_length) + { + //Send to fragmentation node if necessary + vnet_buffer (p0)->ip_frag.header_offset = 0; + vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; + vnet_buffer (p0)->ip_frag.next_index = + IP6_FRAG_NEXT_IP6_LOOKUP; + next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG; + } } - if (PREDICT_FALSE (ip41->flags_and_fragment_offset & - clib_host_to_net_u16 - (IP4_HEADER_FLAG_MORE_FRAGMENTS))) + if (ip4_to_ip6_tcp_udp (p1, ip4_to_ip6_set_cb, pheader1)) { - ip61 = - (ip6_header_t *) u8_ptr_add (ip41, - sizeof (*ip40) - sizeof (*ip60) - - sizeof (*frag0)); - frag1 = - (ip6_frag_hdr_t *) u8_ptr_add (ip41, - sizeof (*ip40) - - sizeof (*frag0)); - frag_id1 = frag_id_4to6 (ip41->fragment_id); - vlib_buffer_advance (p1, - sizeof (*ip40) - sizeof (*ip60) - - sizeof (*frag0)); + p1->error = error_node->errors[MAP_ERROR_UNKNOWN]; + next1 = IP4_MAPT_TCP_UDP_NEXT_DROP; } else { - ip61 = - (ip6_header_t *) (((u8 *) ip41) + sizeof (*ip40) - - sizeof (*ip60)); - vlib_buffer_advance (p1, sizeof (*ip40) - sizeof (*ip60)); - frag1 = NULL; - } - - ip60->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20)); - ip61->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 ((6 << 28) + (ip41->tos << 20)); - ip60->payload_length = u16_net_add (ip40->length, -sizeof (*ip40)); - ip61->payload_length = u16_net_add (ip41->length, -sizeof (*ip40)); - ip60->hop_limit = ip40->ttl; - ip61->hop_limit = ip41->ttl; - ip60->protocol = ip40->protocol; - ip61->protocol = ip41->protocol; - - if (PREDICT_FALSE (frag0 != NULL)) - { - frag0->next_hdr = ip60->protocol; - frag0->identification = frag_id0; - frag0->rsv = 0; - frag0->fragment_offset_and_more = - ip6_frag_hdr_offset_and_more (0, 1); - ip60->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION; - ip60->payload_length = - u16_net_add (ip60->payload_length, sizeof (*frag0)); - } - - if (PREDICT_FALSE (frag1 != NULL)) - { - frag1->next_hdr = ip61->protocol; - frag1->identification = frag_id1; - frag1->rsv = 0; - frag1->fragment_offset_and_more = - ip6_frag_hdr_offset_and_more (0, 1); - ip61->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION; - ip61->payload_length = - u16_net_add (ip61->payload_length, sizeof (*frag0)); - } - - //Finally copying the address - ip60->dst_address.as_u64[0] = pheader0->daddr.as_u64[0]; - ip61->dst_address.as_u64[0] = pheader1->daddr.as_u64[0]; - ip60->dst_address.as_u64[1] = pheader0->daddr.as_u64[1]; - ip61->dst_address.as_u64[1] = pheader1->daddr.as_u64[1]; - ip60->src_address.as_u64[0] = pheader0->saddr.as_u64[0]; - ip61->src_address.as_u64[0] = pheader1->saddr.as_u64[0]; - ip60->src_address.as_u64[1] = pheader0->saddr.as_u64[1]; - ip61->src_address.as_u64[1] = pheader1->saddr.as_u64[1]; - - csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[0]); - csum1 = ip_csum_add_even (csum1, ip61->src_address.as_u64[0]); - csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[1]); - csum1 = ip_csum_add_even (csum1, ip61->src_address.as_u64[1]); - csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[0]); - csum1 = ip_csum_add_even (csum1, ip61->dst_address.as_u64[0]); - csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[1]); - csum1 = ip_csum_add_even (csum1, ip61->dst_address.as_u64[1]); - *checksum0 = ip_csum_fold (csum0); - *checksum1 = ip_csum_fold (csum1); - - if (vnet_buffer (p0)->map_t.mtu < p0->current_length) - { - vnet_buffer (p0)->ip_frag.header_offset = 0; - vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; - vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP; - next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG; - } - - if (vnet_buffer (p1)->map_t.mtu < p1->current_length) - { - vnet_buffer (p1)->ip_frag.header_offset = 0; - vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu; - vnet_buffer (p1)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP; - next1 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG; + if (vnet_buffer (p1)->map_t.mtu < p1->current_length) + { + //Send to fragmentation node if necessary + vnet_buffer (p1)->ip_frag.header_offset = 0; + vnet_buffer (p1)->ip_frag.mtu = vnet_buffer (p1)->map_t.mtu; + vnet_buffer (p1)->ip_frag.next_index = + IP6_FRAG_NEXT_IP6_LOOKUP; + next1 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG; + } } vlib_validate_buffer_enqueue_x2 (vm, node, next_index, @@ -863,12 +394,6 @@ ip4_map_t_tcp_udp (vlib_main_t * vm, { u32 pi0; vlib_buffer_t *p0; - ip4_header_t *ip40; - ip6_header_t *ip60; - ip_csum_t csum0; - u16 *checksum0; - ip6_frag_hdr_t *frag0; - u32 frag_id0; ip4_mapt_pseudo_header_t *pheader0; ip4_mapt_tcp_udp_next_t next0; @@ -885,102 +410,23 @@ ip4_map_t_tcp_udp (vlib_main_t * vm, pheader0 = vlib_buffer_get_current (p0); vlib_buffer_advance (p0, sizeof (*pheader0)); - //Accessing ip4 header - ip40 = vlib_buffer_get_current (p0); - checksum0 = - (u16 *) u8_ptr_add (ip40, - vnet_buffer (p0)->map_t.checksum_offset); - - //UDP checksum is optional over IPv4 but mandatory for IPv6 - //We do not check udp->length sanity but use our safe computed value instead - if (PREDICT_FALSE - (!*checksum0 && ip40->protocol == IP_PROTOCOL_UDP)) - { - u16 udp_len = - clib_host_to_net_u16 (ip40->length) - sizeof (*ip40); - udp_header_t *udp = - (udp_header_t *) u8_ptr_add (ip40, sizeof (*ip40)); - ip_csum_t csum; - csum = ip_incremental_checksum (0, udp, udp_len); - csum = - ip_csum_with_carry (csum, clib_host_to_net_u16 (udp_len)); - csum = - ip_csum_with_carry (csum, - clib_host_to_net_u16 (IP_PROTOCOL_UDP)); - csum = - ip_csum_with_carry (csum, *((u64 *) (&ip40->src_address))); - *checksum0 = ~ip_csum_fold (csum); - } - - csum0 = ip_csum_sub_even (*checksum0, ip40->src_address.as_u32); - csum0 = ip_csum_sub_even (csum0, ip40->dst_address.as_u32); - - // Deal with fragmented packets - if (PREDICT_FALSE (ip40->flags_and_fragment_offset & - clib_host_to_net_u16 - (IP4_HEADER_FLAG_MORE_FRAGMENTS))) + if (ip4_to_ip6_tcp_udp (p0, ip4_to_ip6_set_cb, pheader0)) { - ip60 = - (ip6_header_t *) u8_ptr_add (ip40, - sizeof (*ip40) - sizeof (*ip60) - - sizeof (*frag0)); - frag0 = - (ip6_frag_hdr_t *) u8_ptr_add (ip40, - sizeof (*ip40) - - sizeof (*frag0)); - frag_id0 = frag_id_4to6 (ip40->fragment_id); - vlib_buffer_advance (p0, - sizeof (*ip40) - sizeof (*ip60) - - sizeof (*frag0)); + p0->error = error_node->errors[MAP_ERROR_UNKNOWN]; + next0 = IP4_MAPT_TCP_UDP_NEXT_DROP; } else { - ip60 = - (ip6_header_t *) (((u8 *) ip40) + sizeof (*ip40) - - sizeof (*ip60)); - vlib_buffer_advance (p0, sizeof (*ip40) - sizeof (*ip60)); - frag0 = NULL; + if (vnet_buffer (p0)->map_t.mtu < p0->current_length) + { + //Send to fragmentation node if necessary + vnet_buffer (p0)->ip_frag.header_offset = 0; + vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; + vnet_buffer (p0)->ip_frag.next_index = + IP6_FRAG_NEXT_IP6_LOOKUP; + next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG; + } } - - ip60->ip_version_traffic_class_and_flow_label = - clib_host_to_net_u32 ((6 << 28) + (ip40->tos << 20)); - ip60->payload_length = u16_net_add (ip40->length, -sizeof (*ip40)); - ip60->hop_limit = ip40->ttl; - ip60->protocol = ip40->protocol; - - if (PREDICT_FALSE (frag0 != NULL)) - { - frag0->next_hdr = ip60->protocol; - frag0->identification = frag_id0; - frag0->rsv = 0; - frag0->fragment_offset_and_more = - ip6_frag_hdr_offset_and_more (0, 1); - ip60->protocol = IP_PROTOCOL_IPV6_FRAGMENTATION; - ip60->payload_length = - u16_net_add (ip60->payload_length, sizeof (*frag0)); - } - - //Finally copying the address - ip60->dst_address.as_u64[0] = pheader0->daddr.as_u64[0]; - ip60->dst_address.as_u64[1] = pheader0->daddr.as_u64[1]; - ip60->src_address.as_u64[0] = pheader0->saddr.as_u64[0]; - ip60->src_address.as_u64[1] = pheader0->saddr.as_u64[1]; - - csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[0]); - csum0 = ip_csum_add_even (csum0, ip60->src_address.as_u64[1]); - csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[0]); - csum0 = ip_csum_add_even (csum0, ip60->dst_address.as_u64[1]); - *checksum0 = ip_csum_fold (csum0); - - if (vnet_buffer (p0)->map_t.mtu < p0->current_length) - { - //Send to fragmentation node if necessary - vnet_buffer (p0)->ip_frag.header_offset = 0; - vnet_buffer (p0)->ip_frag.mtu = vnet_buffer (p0)->map_t.mtu; - vnet_buffer (p0)->ip_frag.next_index = IP6_FRAG_NEXT_IP6_LOOKUP; - next0 = IP4_MAPT_TCP_UDP_NEXT_IP6_FRAG; - } - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, to_next, n_left_to_next, pi0, next0); @@ -1159,10 +605,10 @@ ip4_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX, thread_index, - vnet_buffer (p0)->map_t. - map_domain_index, 1, - clib_net_to_host_u16 (ip40-> - length)); + vnet_buffer (p0)-> + map_t.map_domain_index, 1, + clib_net_to_host_u16 + (ip40->length)); } if (PREDICT_TRUE @@ -1170,10 +616,10 @@ ip4_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX, thread_index, - vnet_buffer (p1)->map_t. - map_domain_index, 1, - clib_net_to_host_u16 (ip41-> - length)); + vnet_buffer (p1)-> + map_t.map_domain_index, 1, + clib_net_to_host_u16 + (ip41->length)); } next0 = (error0 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next0; @@ -1253,10 +699,10 @@ ip4_map_t (vlib_main_t * vm, vlib_node_runtime_t * node, vlib_frame_t * frame) { vlib_increment_combined_counter (cm + MAP_DOMAIN_COUNTER_TX, thread_index, - vnet_buffer (p0)->map_t. - map_domain_index, 1, - clib_net_to_host_u16 (ip40-> - length)); + vnet_buffer (p0)-> + map_t.map_domain_index, 1, + clib_net_to_host_u16 + (ip40->length)); } next0 = (error0 != MAP_ERROR_NONE) ? IP4_MAPT_NEXT_DROP : next0; |