X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fvnet%2Fipsec%2Fipsec_input.c;h=aa7627d9b4b501b5f463e15945cedd0b67463ee4;hb=751bb131e;hp=778570a41d41399de05efcb775933928b381ccdd;hpb=9b208ced585d3b4620d6fde586cd047fe2027ecf;p=vpp.git diff --git a/src/vnet/ipsec/ipsec_input.c b/src/vnet/ipsec/ipsec_input.c index 778570a41d4..aa7627d9b4b 100644 --- a/src/vnet/ipsec/ipsec_input.c +++ b/src/vnet/ipsec/ipsec_input.c @@ -25,9 +25,12 @@ #include #include -#define foreach_ipsec_input_error \ -_(RX_PKTS, "IPSEC pkts received") \ -_(RX_MATCH_PKTS, "IPSEC pkts matched") +#define foreach_ipsec_input_error \ +_(RX_PKTS, "IPSec pkts received") \ +_(RX_POLICY_MATCH, "IPSec policy match") \ +_(RX_POLICY_NO_MATCH, "IPSec policy not matched") \ +_(RX_POLICY_BYPASS, "IPSec policy bypass") \ +_(RX_POLICY_DISCARD, "IPSec policy discard") typedef enum { @@ -61,13 +64,42 @@ format_ipsec_input_trace (u8 * s, va_list * args) CLIB_UNUSED (vlib_node_t * node) = va_arg (*args, vlib_node_t *); ipsec_input_trace_t *t = va_arg (*args, ipsec_input_trace_t *); - s = format (s, "%U: sa_id %u spd %u policy %d spi %u seq %u", + s = format (s, "%U: sa_id %u spd %u policy %d spi %u (0x%08x) seq %u", format_ip_protocol, t->proto, t->sa_id, - t->spd, t->policy_index, t->spi, t->seq); + t->spd, t->policy_index, t->spi, t->spi, t->seq); return s; } +always_inline ipsec_policy_t * +ipsec_input_policy_match (ipsec_spd_t * spd, u32 sa, u32 da, + ipsec_spd_policy_type_t policy_type) +{ + ipsec_main_t *im = &ipsec_main; + ipsec_policy_t *p; + u32 *i; + + vec_foreach (i, spd->policies[policy_type]) + { + p = pool_elt_at_index (im->policies, *i); + + if (da < clib_net_to_host_u32 (p->laddr.start.ip4.as_u32)) + continue; + + if (da > clib_net_to_host_u32 (p->laddr.stop.ip4.as_u32)) + continue; + + if (sa < clib_net_to_host_u32 (p->raddr.start.ip4.as_u32)) + continue; + + if (sa > clib_net_to_host_u32 (p->raddr.stop.ip4.as_u32)) + continue; + + return p; + } + return 0; +} + always_inline ipsec_policy_t * ipsec_input_protect_policy_match (ipsec_spd_t * spd, u32 sa, u32 da, u32 spi) { @@ -86,25 +118,25 @@ ipsec_input_protect_policy_match (ipsec_spd_t * spd, u32 sa, u32 da, u32 spi) if (ipsec_sa_is_set_IS_TUNNEL (s)) { - if (da != s->tunnel_dst_addr.ip4.as_u32) + if (da != clib_net_to_host_u32 (s->tunnel_dst_addr.ip4.as_u32)) continue; - if (sa != s->tunnel_src_addr.ip4.as_u32) + if (sa != clib_net_to_host_u32 (s->tunnel_src_addr.ip4.as_u32)) continue; return p; } - if (da < p->laddr.start.ip4.as_u32) + if (da < clib_net_to_host_u32 (p->laddr.start.ip4.as_u32)) continue; - if (da > p->laddr.stop.ip4.as_u32) + if (da > clib_net_to_host_u32 (p->laddr.stop.ip4.as_u32)) continue; - if (sa < p->raddr.start.ip4.as_u32) + if (sa < clib_net_to_host_u32 (p->raddr.start.ip4.as_u32)) continue; - if (sa > p->raddr.stop.ip4.as_u32) + if (sa > clib_net_to_host_u32 (p->raddr.stop.ip4.as_u32)) continue; return p; @@ -162,188 +194,270 @@ ipsec6_input_protect_policy_match (ipsec_spd_t * spd, return 0; } -static vlib_node_registration_t ipsec4_input_node; +extern vlib_node_registration_t ipsec4_input_node; VLIB_NODE_FN (ipsec4_input_node) (vlib_main_t * vm, vlib_node_runtime_t * node, - vlib_frame_t * from_frame) + vlib_frame_t * frame) { - u32 n_left_from, *from, next_index, *to_next, thread_index; + u32 n_left_from, *from, thread_index; ipsec_main_t *im = &ipsec_main; - u32 ipsec_unprocessed = 0; - u32 ipsec_matched = 0; - - from = vlib_frame_vector_args (from_frame); - n_left_from = from_frame->n_vectors; + u64 ipsec_unprocessed = 0, ipsec_matched = 0; + u64 ipsec_dropped = 0, ipsec_bypassed = 0; + vlib_buffer_t *bufs[VLIB_FRAME_SIZE]; + vlib_buffer_t **b = bufs; + u16 nexts[VLIB_FRAME_SIZE], *next; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + next = nexts; + vlib_get_buffers (vm, from, bufs, n_left_from); thread_index = vm->thread_index; - next_index = node->cached_next_index; while (n_left_from > 0) { - u32 n_left_to_next; - - 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 next32, pi0; + ip4_header_t *ip0; + esp_header_t *esp0 = NULL; + ah_header_t *ah0; + ip4_ipsec_config_t *c0; + ipsec_spd_t *spd0; + ipsec_policy_t *p0 = NULL; + u8 has_space0; + + if (n_left_from > 2) { - u32 bi0, next0, pi0; - vlib_buffer_t *b0; - ip4_header_t *ip0; - esp_header_t *esp0; - ah_header_t *ah0; - ip4_ipsec_config_t *c0; - ipsec_spd_t *spd0; - ipsec_policy_t *p0 = 0; + vlib_prefetch_buffer_data (b[1], LOAD); + } - bi0 = to_next[0] = from[0]; - from += 1; - n_left_from -= 1; - to_next += 1; - n_left_to_next -= 1; + b[0]->flags |= VNET_BUFFER_F_IS_IP4; + b[0]->flags &= ~VNET_BUFFER_F_IS_IP6; + c0 = vnet_feature_next_with_data (&next32, b[0], sizeof (c0[0])); + next[0] = (u16) next32; - b0 = vlib_get_buffer (vm, bi0); - b0->flags |= VNET_BUFFER_F_IS_IP4; - b0->flags &= ~VNET_BUFFER_F_IS_IP6; - c0 = vnet_feature_next_with_data (&next0, b0, sizeof (c0[0])); + spd0 = pool_elt_at_index (im->spds, c0->spd_index); - spd0 = pool_elt_at_index (im->spds, c0->spd_index); + ip0 = vlib_buffer_get_current (b[0]); - ip0 = vlib_buffer_get_current (b0); + if (PREDICT_TRUE + (ip0->protocol == IP_PROTOCOL_IPSEC_ESP + || ip0->protocol == IP_PROTOCOL_UDP)) + { - if (PREDICT_TRUE - (ip0->protocol == IP_PROTOCOL_IPSEC_ESP - || ip0->protocol == IP_PROTOCOL_UDP)) + esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0)); + if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_UDP)) { -#if 0 - clib_warning - ("packet received from %U to %U spi %u size %u spd_id %u", - format_ip4_address, ip0->src_address.as_u8, - format_ip4_address, ip0->dst_address.as_u8, - clib_net_to_host_u32 (esp0->spi), - clib_net_to_host_u16 (ip0->length), spd0->id); -#endif + /* FIXME Skip, if not a UDP encapsulated packet */ + esp0 = (esp_header_t *) ((u8 *) esp0 + sizeof (udp_header_t)); + } - esp0 = (esp_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0)); - if (PREDICT_FALSE (ip0->protocol == IP_PROTOCOL_UDP)) - { - esp0 = - (esp_header_t *) ((u8 *) esp0 + sizeof (udp_header_t)); - } - /* FIXME TODO missing check whether there is enough data inside - * IP/UDP to contain ESP header & stuff ? */ - p0 = ipsec_input_protect_policy_match (spd0, - ip0->src_address.as_u32, - ip0->dst_address.as_u32, - clib_net_to_host_u32 - (esp0->spi)); - - if (PREDICT_TRUE (p0 != NULL)) - { - ipsec_matched += 1; + p0 = ipsec_input_protect_policy_match (spd0, + clib_net_to_host_u32 + (ip0->src_address.as_u32), + clib_net_to_host_u32 + (ip0->dst_address.as_u32), + clib_net_to_host_u32 + (esp0->spi)); - pi0 = p0 - im->policies; - vlib_increment_combined_counter - (&ipsec_spd_policy_counters, - thread_index, pi0, 1, - clib_net_to_host_u16 (ip0->length)); + has_space0 = + vlib_buffer_has_space (b[0], + (clib_address_t) (esp0 + 1) - + (clib_address_t) ip0); - vnet_buffer (b0)->ipsec.sad_index = p0->sa_index; - next0 = im->esp4_decrypt_next_index; - vlib_buffer_advance (b0, ((u8 *) esp0 - (u8 *) ip0)); - goto trace0; - } - else - { - pi0 = ~0; - }; + if (PREDICT_TRUE ((p0 != NULL) & (has_space0))) + { + ipsec_matched += 1; - /* FIXME bypass and discard */ - trace0: - if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && - PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - ipsec_input_trace_t *tr = - vlib_add_trace (vm, node, b0, sizeof (*tr)); - - tr->proto = ip0->protocol; - if (p0) - tr->sa_id = p0->sa_id; - tr->spi = clib_net_to_host_u32 (esp0->spi); - tr->seq = clib_net_to_host_u32 (esp0->seq); - tr->spd = spd0->id; - tr->policy_index = pi0; - } + pi0 = p0 - im->policies; + vlib_increment_combined_counter + (&ipsec_spd_policy_counters, + thread_index, pi0, 1, clib_net_to_host_u16 (ip0->length)); + + vnet_buffer (b[0])->ipsec.sad_index = p0->sa_index; + next[0] = im->esp4_decrypt_next_index; + vlib_buffer_advance (b[0], ((u8 *) esp0 - (u8 *) ip0)); + goto trace0; } - else if (ip0->protocol == IP_PROTOCOL_IPSEC_AH) + else + { + p0 = 0; + pi0 = ~0; + }; + + p0 = ipsec_input_policy_match (spd0, + clib_net_to_host_u32 + (ip0->src_address.as_u32), + clib_net_to_host_u32 + (ip0->dst_address.as_u32), + IPSEC_SPD_POLICY_IP4_INBOUND_BYPASS); + if (PREDICT_TRUE ((p0 != NULL))) + { + ipsec_bypassed += 1; + pi0 = p0 - im->policies; + goto trace0; + } + else + { + p0 = 0; + pi0 = ~0; + }; + + p0 = ipsec_input_policy_match (spd0, + clib_net_to_host_u32 + (ip0->src_address.as_u32), + clib_net_to_host_u32 + (ip0->dst_address.as_u32), + IPSEC_SPD_POLICY_IP4_INBOUND_DISCARD); + if (PREDICT_TRUE ((p0 != NULL))) + { + ipsec_dropped += 1; + pi0 = p0 - im->policies; + next[0] = IPSEC_INPUT_NEXT_DROP; + goto trace0; + } + else + { + p0 = 0; + pi0 = ~0; + }; + trace0: + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && + PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) { - ah0 = (ah_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0)); - p0 = ipsec_input_protect_policy_match (spd0, - ip0->src_address.as_u32, - ip0->dst_address.as_u32, - clib_net_to_host_u32 - (ah0->spi)); + ipsec_input_trace_t *tr = + vlib_add_trace (vm, node, b[0], sizeof (*tr)); - if (PREDICT_TRUE (p0 != 0)) - { - ipsec_matched += 1; + tr->proto = ip0->protocol; + tr->sa_id = p0 ? p0->sa_id : ~0; + tr->spi = has_space0 ? clib_net_to_host_u32 (esp0->spi) : ~0; + tr->seq = has_space0 ? clib_net_to_host_u32 (esp0->seq) : ~0; + tr->spd = spd0->id; + tr->policy_index = pi0; + } + } + else if (ip0->protocol == IP_PROTOCOL_IPSEC_AH) + { + ah0 = (ah_header_t *) ((u8 *) ip0 + ip4_header_bytes (ip0)); + p0 = ipsec_input_protect_policy_match (spd0, + clib_net_to_host_u32 + (ip0->src_address.as_u32), + clib_net_to_host_u32 + (ip0->dst_address.as_u32), + clib_net_to_host_u32 + (ah0->spi)); + + has_space0 = + vlib_buffer_has_space (b[0], + (clib_address_t) (ah0 + 1) - + (clib_address_t) ip0); + + if (PREDICT_TRUE ((p0 != NULL) & (has_space0))) + { + ipsec_matched += 1; - pi0 = p0 - im->policies; - vlib_increment_combined_counter - (&ipsec_spd_policy_counters, - thread_index, pi0, 1, - clib_net_to_host_u16 (ip0->length)); + pi0 = p0 - im->policies; + vlib_increment_combined_counter + (&ipsec_spd_policy_counters, + thread_index, pi0, 1, clib_net_to_host_u16 (ip0->length)); - vnet_buffer (b0)->ipsec.sad_index = p0->sa_index; - next0 = im->ah4_decrypt_next_index; - goto trace1; - } - else - { - pi0 = ~0; - } - /* FIXME bypass and discard */ - trace1: - if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && - PREDICT_FALSE (b0->flags & VLIB_BUFFER_IS_TRACED)) - { - ipsec_input_trace_t *tr = - vlib_add_trace (vm, node, b0, sizeof (*tr)); - - tr->proto = ip0->protocol; - if (p0) - tr->sa_id = p0->sa_id; - tr->spi = clib_net_to_host_u32 (ah0->spi); - tr->seq = clib_net_to_host_u32 (ah0->seq_no); - tr->spd = spd0->id; - tr->policy_index = pi0; - } + vnet_buffer (b[0])->ipsec.sad_index = p0->sa_index; + next[0] = im->ah4_decrypt_next_index; + goto trace1; } else { - ipsec_unprocessed += 1; + p0 = 0; + pi0 = ~0; + } + + p0 = ipsec_input_policy_match (spd0, + clib_net_to_host_u32 + (ip0->src_address.as_u32), + clib_net_to_host_u32 + (ip0->dst_address.as_u32), + IPSEC_SPD_POLICY_IP4_INBOUND_BYPASS); + if (PREDICT_TRUE ((p0 != NULL))) + { + ipsec_bypassed += 1; + pi0 = p0 - im->policies; + goto trace1; } + else + { + p0 = 0; + pi0 = ~0; + }; + + p0 = ipsec_input_policy_match (spd0, + clib_net_to_host_u32 + (ip0->src_address.as_u32), + clib_net_to_host_u32 + (ip0->dst_address.as_u32), + IPSEC_SPD_POLICY_IP4_INBOUND_DISCARD); + if (PREDICT_TRUE ((p0 != NULL))) + { + ipsec_dropped += 1; + pi0 = p0 - im->policies; + next[0] = IPSEC_INPUT_NEXT_DROP; + goto trace1; + } + else + { + p0 = 0; + pi0 = ~0; + }; + trace1: + if (PREDICT_FALSE (node->flags & VLIB_NODE_FLAG_TRACE) && + PREDICT_FALSE (b[0]->flags & VLIB_BUFFER_IS_TRACED)) + { + ipsec_input_trace_t *tr = + vlib_add_trace (vm, node, b[0], sizeof (*tr)); - vlib_validate_buffer_enqueue_x1 (vm, node, next_index, - to_next, n_left_to_next, bi0, - next0); + tr->proto = ip0->protocol; + tr->sa_id = p0 ? p0->sa_id : ~0; + tr->spi = has_space0 ? clib_net_to_host_u32 (ah0->spi) : ~0; + tr->seq = has_space0 ? clib_net_to_host_u32 (ah0->seq_no) : ~0; + tr->spd = spd0->id; + tr->policy_index = pi0; + } } - vlib_put_next_frame (vm, node, next_index, n_left_to_next); + else + { + ipsec_unprocessed += 1; + } + n_left_from -= 1; + b += 1; + next += 1; } + vlib_buffer_enqueue_to_next (vm, node, from, nexts, frame->n_vectors); + vlib_node_increment_counter (vm, ipsec4_input_node.index, - IPSEC_INPUT_ERROR_RX_PKTS, - from_frame->n_vectors - ipsec_unprocessed); + IPSEC_INPUT_ERROR_RX_PKTS, frame->n_vectors); vlib_node_increment_counter (vm, ipsec4_input_node.index, - IPSEC_INPUT_ERROR_RX_MATCH_PKTS, + IPSEC_INPUT_ERROR_RX_POLICY_MATCH, ipsec_matched); - return from_frame->n_vectors; + + vlib_node_increment_counter (vm, ipsec4_input_node.index, + IPSEC_INPUT_ERROR_RX_POLICY_NO_MATCH, + ipsec_unprocessed); + + vlib_node_increment_counter (vm, ipsec4_input_node.index, + IPSEC_INPUT_ERROR_RX_POLICY_DISCARD, + ipsec_dropped); + + vlib_node_increment_counter (vm, ipsec4_input_node.index, + IPSEC_INPUT_ERROR_RX_POLICY_BYPASS, + ipsec_bypassed); + + return frame->n_vectors; } /* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ipsec4_input_node,static) = { +VLIB_REGISTER_NODE (ipsec4_input_node) = { .name = "ipsec4-input-feature", .vector_size = sizeof (u32), .format_trace = format_ipsec_input_trace, @@ -359,7 +473,7 @@ VLIB_REGISTER_NODE (ipsec4_input_node,static) = { }; /* *INDENT-ON* */ -static vlib_node_registration_t ipsec6_input_node; +extern vlib_node_registration_t ipsec6_input_node; VLIB_NODE_FN (ipsec6_input_node) (vlib_main_t * vm, @@ -507,7 +621,7 @@ VLIB_NODE_FN (ipsec6_input_node) (vlib_main_t * vm, from_frame->n_vectors - ipsec_unprocessed); vlib_node_increment_counter (vm, ipsec6_input_node.index, - IPSEC_INPUT_ERROR_RX_MATCH_PKTS, + IPSEC_INPUT_ERROR_RX_POLICY_MATCH, ipsec_matched); return from_frame->n_vectors; @@ -515,7 +629,7 @@ VLIB_NODE_FN (ipsec6_input_node) (vlib_main_t * vm, /* *INDENT-OFF* */ -VLIB_REGISTER_NODE (ipsec6_input_node,static) = { +VLIB_REGISTER_NODE (ipsec6_input_node) = { .name = "ipsec6-input-feature", .vector_size = sizeof (u32), .format_trace = format_ipsec_input_trace,