diff options
Diffstat (limited to 'vnet/vnet/ip/ip4_source_and_port_range_check.c')
| -rw-r--r-- | vnet/vnet/ip/ip4_source_and_port_range_check.c | 956 |
1 files changed, 956 insertions, 0 deletions
diff --git a/vnet/vnet/ip/ip4_source_and_port_range_check.c b/vnet/vnet/ip/ip4_source_and_port_range_check.c new file mode 100644 index 00000000000..9dfb5228056 --- /dev/null +++ b/vnet/vnet/ip/ip4_source_and_port_range_check.c @@ -0,0 +1,956 @@ +/* + * Copyright (c) 2016 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 <vnet/ip/ip.h> + +typedef struct { + u32 ranges_per_adjacency; + u32 special_adjacency_format_function_index; + + /* convenience */ + vlib_main_t *vlib_main; + vnet_main_t *vnet_main; +} source_range_check_main_t; + +source_range_check_main_t source_range_check_main; + +vlib_node_registration_t ip4_source_port_and_range_check; + +typedef struct { + union { + u16x8 as_u16x8; + u16 as_u16[8]; + }; +} u16x8vec_t; + +typedef struct { + u16x8vec_t low; + u16x8vec_t hi; +} port_range_t; + +#define foreach_ip4_source_and_port_range_check_error \ +_(CHECK_FAIL, "ip4 source and port range check bad packets") \ +_(CHECK_OK, "ip4 source and port range check good packets") + +typedef enum { +#define _(sym,str) IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_##sym, + foreach_ip4_source_and_port_range_check_error +#undef _ + IP4_SOURCE_AND_PORT_RANGE_CHECK_N_ERROR, +} ip4_source_and_port_range_check_error_t; + +static char * ip4_source_and_port_range_check_error_strings[] = { +#define _(sym,string) string, + foreach_ip4_source_and_port_range_check_error +#undef _ +}; + +typedef struct { + u32 pass; + u32 bypass; + u32 is_tcp; + ip4_address_t src_addr; + u16 dst_port; +} ip4_source_and_port_range_check_trace_t; + +static u8 * format_ip4_source_and_port_range_check_trace (u8 * s, va_list * va) +{ + CLIB_UNUSED (vlib_main_t * vm) = va_arg (*va, vlib_main_t *); + CLIB_UNUSED (vlib_node_t * node) = va_arg (*va, vlib_node_t *); + ip4_source_and_port_range_check_trace_t * t = + va_arg (*va, ip4_source_and_port_range_check_trace_t *); + + if (t->bypass) + s = format (s, "PASS (bypass case)"); + else + s = format (s, "src ip %U %s dst port %d: %s", + format_ip4_address, &t->src_addr, t->is_tcp ? "TCP" : "UDP", + (u32) t->dst_port, + (t->pass == 1) ? "PASS" : "FAIL"); + return s; +} + +typedef enum { + IP4_SOURCE_AND_PORT_RANGE_CHECK_NEXT_DROP, + IP4_SOURCE_AND_PORT_RANGE_CHECK_N_NEXT, +} ip4_source_and_port_range_check_next_t; + +typedef union { + u32 fib_index; +} ip4_source_and_port_range_check_config_t; + +static inline u32 check_adj_port_range_x1 (ip_adjacency_t * adj, + u16 dst_port, + u32 next) +{ + port_range_t *range; + u16x8vec_t key; + u16x8vec_t diff1; + u16x8vec_t diff2; + u16x8vec_t sum, sum_equal_diff2; + u16 sum_nonzero, sum_equal, winner_mask; + int i; + u8 * rwh; + + if (adj->lookup_next_index != IP_LOOKUP_NEXT_ICMP_ERROR || dst_port == 0) + return IP4_SOURCE_AND_PORT_RANGE_CHECK_NEXT_DROP; + + rwh = (u8 *)(&adj->rewrite_header); + range = (port_range_t *)rwh; + + /* Make the obvious screw-case work. A variant also works w/ no MMX */ + if (PREDICT_FALSE(dst_port == 65535)) + { + int j; + + for (i = 0; i < VLIB_BUFFER_PRE_DATA_SIZE / sizeof(port_range_t); i++) + { + for (j = 0; j < 8; j++) + if (range->low.as_u16x8[j] == 65535) + return next; + range++; + } + return IP4_SOURCE_AND_PORT_RANGE_CHECK_NEXT_DROP; + } + + key.as_u16x8 = u16x8_splat (dst_port); + + for (i = 0; i < VLIB_BUFFER_PRE_DATA_SIZE / sizeof(port_range_t); i++) + { + diff1.as_u16x8 = u16x8_sub_saturate (range->low.as_u16x8, key.as_u16x8); + diff2.as_u16x8 = u16x8_sub_saturate (range->hi.as_u16x8, key.as_u16x8); + sum.as_u16x8 = u16x8_add (diff1.as_u16x8, diff2.as_u16x8); + sum_equal_diff2.as_u16x8 = u16x8_is_equal (sum.as_u16x8, diff2.as_u16x8); + sum_nonzero = ~u16x8_zero_byte_mask (sum.as_u16x8); + sum_equal = ~u16x8_zero_byte_mask (sum_equal_diff2.as_u16x8); + winner_mask = sum_nonzero & sum_equal; + if (winner_mask) + return next; + range++; + } + return IP4_SOURCE_AND_PORT_RANGE_CHECK_NEXT_DROP; +} + +always_inline uword +ip4_source_and_port_range_check_inline +(vlib_main_t * vm, vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + ip4_main_t * im = &ip4_main; + ip_lookup_main_t * lm = &im->lookup_main; + ip_config_main_t * cm = &lm->rx_config_mains[VNET_UNICAST]; + u32 n_left_from, * from, * to_next; + u32 next_index; + vlib_node_runtime_t * error_node = node; + u32 good_packets = 0; + + from = vlib_frame_vector_args (frame); + n_left_from = frame->n_vectors; + 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 >= 4 && n_left_to_next >= 2) + { + vlib_buffer_t * b0, * b1; + ip4_header_t * ip0, * ip1; + ip4_fib_mtrie_t * mtrie0, * mtrie1; + ip4_fib_mtrie_leaf_t leaf0, leaf1; + ip4_source_and_port_range_check_config_t * c0, * c1; + ip_adjacency_t * adj0, * adj1; + u32 bi0, next0, adj_index0, pass0, save_next0; + u32 bi1, next1, adj_index1, pass1, save_next1; + udp_header_t * udp0, * udp1; + + /* Prefetch next iteration. */ + { + vlib_buffer_t * p2, * p3; + + p2 = vlib_get_buffer (vm, from[2]); + p3 = vlib_get_buffer (vm, from[3]); + + vlib_prefetch_buffer_header (p2, LOAD); + vlib_prefetch_buffer_header (p3, LOAD); + + CLIB_PREFETCH (p2->data, sizeof (ip0[0]), LOAD); + CLIB_PREFETCH (p3->data, sizeof (ip1[0]), LOAD); + } + + bi0 = to_next[0] = from[0]; + bi1 = to_next[1] = from[1]; + from += 2; + to_next += 2; + n_left_from -= 2; + n_left_to_next -= 2; + + b0 = vlib_get_buffer (vm, bi0); + b1 = vlib_get_buffer (vm, bi1); + + ip0 = vlib_buffer_get_current (b0); + ip1 = vlib_buffer_get_current (b1); + + c0 = vnet_get_config_data (&cm->config_main, + &b0->current_config_index, + &next0, + sizeof (c0[0])); + c1 = vnet_get_config_data (&cm->config_main, + &b1->current_config_index, + &next1, + sizeof (c1[0])); + + /* we can't use the default VRF here... */ + ASSERT (c0->fib_index && c1->fib_index); + + mtrie0 = &vec_elt_at_index (im->fibs, c0->fib_index)->mtrie; + mtrie1 = &vec_elt_at_index (im->fibs, c1->fib_index)->mtrie; + + leaf0 = leaf1 = IP4_FIB_MTRIE_LEAF_ROOT; + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 0); + leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, + &ip1->src_address, 0); + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 1); + leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, + &ip1->src_address, 1); + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 2); + leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, + &ip1->src_address, 2); + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 3); + leaf1 = ip4_fib_mtrie_lookup_step (mtrie1, leaf1, + &ip1->src_address, 3); + + adj_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); + adj_index1 = ip4_fib_mtrie_leaf_get_adj_index (leaf1); + + ASSERT (adj_index0 == ip4_fib_lookup_with_table (im, c0->fib_index, + &ip0->src_address, + 0 /* use dflt rt */)); + + ASSERT (adj_index1 == ip4_fib_lookup_with_table (im, c1->fib_index, + &ip1->src_address, + 0)); + adj0 = ip_get_adjacency (lm, adj_index0); + adj1 = ip_get_adjacency (lm, adj_index1); + + pass0 = 0; + pass0 |= ip4_address_is_multicast (&ip0->src_address); + pass0 |= ip0->src_address.as_u32 == clib_host_to_net_u32(0xFFFFFFFF); + pass0 |= (ip0->protocol != IP_PROTOCOL_UDP) && + (ip0->protocol != IP_PROTOCOL_TCP); + + pass1 = 0; + pass1 |= ip4_address_is_multicast (&ip1->src_address); + pass1 |= ip1->src_address.as_u32 == clib_host_to_net_u32(0xFFFFFFFF); + pass1 |= (ip1->protocol != IP_PROTOCOL_UDP) && + (ip1->protocol != IP_PROTOCOL_TCP); + + save_next0 = next0; + udp0 = ip4_next_header (ip0); + save_next1 = next1; + udp1 = ip4_next_header (ip1); + + if (PREDICT_TRUE(pass0 == 0)) + { + good_packets ++; + next0 = check_adj_port_range_x1 + (adj0, clib_net_to_host_u16(udp0->dst_port), next0); + good_packets -= (save_next0 != next0); + b0->error = error_node->errors + [IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_FAIL]; + } + + if (PREDICT_TRUE(pass1 == 0)) + { + good_packets ++; + next1 = check_adj_port_range_x1 + (adj1, clib_net_to_host_u16(udp1->dst_port), next1); + good_packets -= (save_next1 != next1); + b1->error = error_node->errors + [IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_FAIL]; + } + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) { + ip4_source_and_port_range_check_trace_t * t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->pass = next0 == save_next0; + t->bypass = pass0; + t->src_addr.as_u32 = ip0->src_address.as_u32; + t->dst_port = (pass0 == 0) ? + clib_net_to_host_u16(udp0->dst_port) : 0; + t->is_tcp = ip0->protocol == IP_PROTOCOL_TCP; + } + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b1->flags & VLIB_BUFFER_IS_TRACED))) { + ip4_source_and_port_range_check_trace_t * t = + vlib_add_trace (vm, node, b1, sizeof (*t)); + t->pass = next1 == save_next1; + t->bypass = pass1; + t->src_addr.as_u32 = ip1->src_address.as_u32; + t->dst_port = (pass1 == 0) ? + clib_net_to_host_u16(udp1->dst_port) : 0; + t->is_tcp = ip1->protocol == IP_PROTOCOL_TCP; + } + + vlib_validate_buffer_enqueue_x2 (vm, node, next_index, + to_next, n_left_to_next, + bi0, bi1, next0, next1); + } + + while (n_left_from > 0 && n_left_to_next > 0) + { + vlib_buffer_t * b0; + ip4_header_t * ip0; + ip4_fib_mtrie_t * mtrie0; + ip4_fib_mtrie_leaf_t leaf0; + ip4_source_and_port_range_check_config_t * c0; + ip_adjacency_t * adj0; + u32 bi0, next0, adj_index0, pass0, save_next0; + udp_header_t * udp0; + + bi0 = from[0]; + to_next[0] = bi0; + from += 1; + to_next += 1; + n_left_from -= 1; + n_left_to_next -= 1; + + b0 = vlib_get_buffer (vm, bi0); + ip0 = vlib_buffer_get_current (b0); + + c0 = vnet_get_config_data + (&cm->config_main, &b0->current_config_index, + &next0, + sizeof (c0[0])); + + /* we can't use the default VRF here... */ + ASSERT(c0->fib_index); + + mtrie0 = &vec_elt_at_index (im->fibs, c0->fib_index)->mtrie; + + leaf0 = IP4_FIB_MTRIE_LEAF_ROOT; + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 0); + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 1); + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 2); + + leaf0 = ip4_fib_mtrie_lookup_step (mtrie0, leaf0, + &ip0->src_address, 3); + + adj_index0 = ip4_fib_mtrie_leaf_get_adj_index (leaf0); + + ASSERT (adj_index0 == ip4_fib_lookup_with_table + (im, c0->fib_index, + &ip0->src_address, + 0 /* use default route */)); + adj0 = ip_get_adjacency (lm, adj_index0); + + /* + * $$$ which (src,dst) categories should we always pass? + */ + pass0 = 0; + pass0 |= ip4_address_is_multicast (&ip0->src_address); + pass0 |= ip0->src_address.as_u32 == clib_host_to_net_u32(0xFFFFFFFF); + pass0 |= (ip0->protocol != IP_PROTOCOL_UDP) && + (ip0->protocol != IP_PROTOCOL_TCP); + + save_next0 = next0; + udp0 = ip4_next_header (ip0); + + if (PREDICT_TRUE(pass0 == 0)) + { + good_packets ++; + next0 = check_adj_port_range_x1 + (adj0, clib_net_to_host_u16(udp0->dst_port), next0); + good_packets -= (save_next0 != next0); + b0->error = error_node->errors + [IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_FAIL]; + } + + if (PREDICT_FALSE((node->flags & VLIB_NODE_FLAG_TRACE) + && (b0->flags & VLIB_BUFFER_IS_TRACED))) { + ip4_source_and_port_range_check_trace_t * t = + vlib_add_trace (vm, node, b0, sizeof (*t)); + t->pass = next0 == save_next0; + t->bypass = pass0; + t->src_addr.as_u32 = ip0->src_address.as_u32; + t->dst_port = (pass0 == 0) ? + clib_net_to_host_u16(udp0->dst_port) : 0; + t->is_tcp = ip0->protocol == IP_PROTOCOL_TCP; + } + + vlib_validate_buffer_enqueue_x1 (vm, node, next_index, + to_next, n_left_to_next, + bi0, next0); + } + + vlib_put_next_frame (vm, node, next_index, n_left_to_next); + } + + vlib_node_increment_counter (vm, ip4_source_port_and_range_check.index, + IP4_SOURCE_AND_PORT_RANGE_CHECK_ERROR_CHECK_OK, + good_packets); + return frame->n_vectors; +} + +static uword +ip4_source_and_port_range_check (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + return ip4_source_and_port_range_check_inline (vm, node, frame); +} + +VLIB_REGISTER_NODE (ip4_source_port_and_range_check) = { + .function = ip4_source_and_port_range_check, + .name = "ip4-source-and-port-range-check", + .vector_size = sizeof (u32), + + .n_errors = ARRAY_LEN(ip4_source_and_port_range_check_error_strings), + .error_strings = ip4_source_and_port_range_check_error_strings, + + .n_next_nodes = IP4_SOURCE_AND_PORT_RANGE_CHECK_N_NEXT, + .next_nodes = { + [IP4_SOURCE_AND_PORT_RANGE_CHECK_NEXT_DROP] = "error-drop", + }, + + .format_buffer = format_ip4_header, + .format_trace = format_ip4_source_and_port_range_check_trace, +}; + +int set_ip_source_and_port_range_check (vlib_main_t * vm, + u32 fib_index, + u32 sw_if_index, + u32 is_add) +{ + ip4_main_t * im = &ip4_main; + ip_lookup_main_t * lm = &im->lookup_main; + ip_config_main_t * rx_cm = &lm->rx_config_mains[VNET_UNICAST]; + u32 ci; + ip4_source_and_port_range_check_config_t config; + u32 feature_index; + int rv = 0; + u8 is_del = !is_add; + + config.fib_index = fib_index; + feature_index = im->ip4_unicast_rx_feature_source_and_port_range_check; + + vec_validate (rx_cm->config_index_by_sw_if_index, sw_if_index); + + ci = rx_cm->config_index_by_sw_if_index[sw_if_index]; + ci = (is_del + ? vnet_config_del_feature + : vnet_config_add_feature) + (vm, &rx_cm->config_main, + ci, + feature_index, + &config, + sizeof (config)); + rx_cm->config_index_by_sw_if_index[sw_if_index] = ci; + + return rv; +} + +static clib_error_t * +set_ip_source_and_port_range_check_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + vnet_main_t * vnm = vnet_get_main(); + ip4_main_t * im = &ip4_main; + clib_error_t * error = 0; + u32 is_add = 1; + u32 sw_if_index = ~0; + u32 vrf_id = ~0; + u32 fib_index; + uword * p; + int rv = 0; + + sw_if_index = ~0; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_vnet_sw_interface, vnm, + &sw_if_index)) + ; + else if (unformat (input, "vrf %d", &vrf_id)) + ; + else if (unformat (input, "del")) + is_add = 0; + else + break; + } + + if (sw_if_index == ~0) + return clib_error_return (0, "Interface required but not specified"); + + if (vrf_id == ~0) + return clib_error_return (0, "VRF ID required but not specified"); + + if (vrf_id == 0) + return clib_error_return (0, "VRF ID should not be default. Should be distinct VRF for this purpose. "); + + p = hash_get (im->fib_index_by_table_id, vrf_id); + + if (p == 0) + return clib_error_return (0, "Invalid VRF ID %d", vrf_id); + + fib_index = p[0]; + rv = set_ip_source_and_port_range_check (vm, fib_index, sw_if_index, is_add); + + switch(rv) + { + case 0: + break; + + default: + return clib_error_return + (0, "set source and port-range on interface returned an unexpected value: %d", rv); + } + return error; +} + +VLIB_CLI_COMMAND (set_interface_ip_source_and_port_range_check_command, + static) = { + .path = "set interface ip source-and-port-range-check", + .function = set_ip_source_and_port_range_check_fn, + .short_help = "set int ip source-and-port-range-check <intfc> vrf <n> [del]", +}; + +static u8 * format_source_and_port_rc_adjacency (u8 * s, va_list * args) +{ + CLIB_UNUSED (vnet_main_t * vnm) = va_arg (*args, vnet_main_t *); + ip_lookup_main_t * lm = va_arg (*args, ip_lookup_main_t *); + u32 adj_index = va_arg (*args, u32); + ip_adjacency_t * adj = ip_get_adjacency (lm, adj_index); + source_range_check_main_t * srm = &source_range_check_main; + u8 * rwh = (u8 *) (&adj->rewrite_header); + port_range_t * range; + int i, j; + int printed = 0; + + range = (port_range_t *) rwh; + + s = format (s, "allow "); + + for (i = 0; i < srm->ranges_per_adjacency; i++) + { + for (j = 0; j < 8; j++) + { + if (range->low.as_u16[j]) + { + if (printed) + s = format (s, ", "); + if (range->hi.as_u16[j] > (range->low.as_u16[j] + 1)) + s = format (s, "%d-%d", (u32) range->low.as_u16[j], + (u32) range->hi.as_u16[j] - 1); + else + s = format (s, "%d", range->low.as_u16[j]); + printed = 1; + } + } + range++; + } + return s; +} + +clib_error_t * ip4_source_and_port_range_check_init (vlib_main_t * vm) +{ + source_range_check_main_t * srm = &source_range_check_main; + ip4_main_t * im = &ip4_main; + ip_lookup_main_t * lm = &im->lookup_main; + + srm->vlib_main = vm; + srm->vnet_main = vnet_get_main(); + + srm->ranges_per_adjacency = VLIB_BUFFER_PRE_DATA_SIZE / (2*sizeof(u16x8)); + srm->special_adjacency_format_function_index = + vnet_register_special_adjacency_format_function + (lm, format_source_and_port_rc_adjacency); + ASSERT (srm->special_adjacency_format_function_index); + + return 0; +} + +VLIB_INIT_FUNCTION (ip4_source_and_port_range_check_init); + + +int ip4_source_and_port_range_check_add_del +(ip4_address_t * address, u32 length, u32 vrf_id, u16 * low_ports, + u16 * hi_ports, int is_add) +{ + source_range_check_main_t * srm = &source_range_check_main; + ip4_main_t * im = &ip4_main; + ip_lookup_main_t * lm = &im->lookup_main; + uword * p; + u32 fib_index; + u32 adj_index; + ip_adjacency_t * adj; + int i, j, k; + port_range_t * range; + u8 *rwh; + + p = hash_get (im->fib_index_by_table_id, vrf_id); + if (!p) + { + ip4_fib_t * f; + f = find_ip4_fib_by_table_index_or_id (im, vrf_id, 0 /* flags */); + fib_index = f->index; + } + else + fib_index = p[0]; + + adj_index = ip4_fib_lookup_with_table + (im, fib_index, address, 0 /* disable_default_route */); + + if (is_add == 0) + { + adj = ip_get_adjacency (lm, adj_index); + if (adj->lookup_next_index != IP_LOOKUP_NEXT_ICMP_ERROR) + return VNET_API_ERROR_INCORRECT_ADJACENCY_TYPE; + + rwh = (u8 *)(&adj->rewrite_header); + + for (i = 0; i < vec_len (low_ports); i++) + { + range = (port_range_t *) rwh; + for (j = 0; j < srm->ranges_per_adjacency; j++) + { + for (k = 0; k < 8; k++) + { + if (low_ports[i] == range->low.as_u16[k] && + hi_ports[i] == range->hi.as_u16[k]) + { + range->low.as_u16[k] = range->hi.as_u16[k] = 0; + goto doublebreak; + } + } + range++; + } + doublebreak: ; + } + + range = (port_range_t *) rwh; + /* Have we deleted all ranges yet? */ + for (i = 0; i < srm->ranges_per_adjacency; i++) + { + for (j = 0; j < 8; j++) + { + if (range->low.as_u16[i] != 0) + goto still_occupied; + } + range++; + } + /* Yes, lose the adjacency... */ + { + ip4_add_del_route_args_t a; + + memset (&a, 0, sizeof(a)); + a.flags = IP4_ROUTE_FLAG_FIB_INDEX | IP4_ROUTE_FLAG_DEL; + a.table_index_or_table_id = fib_index; + a.dst_address = address[0]; + a.dst_address_length = length; + a.adj_index = adj_index; + ip4_add_del_route (im, &a); + } + + still_occupied: + ; + } + else + { + adj = ip_get_adjacency (lm, adj_index); + /* $$$$ fixme: add ports if address + mask match */ + if (adj->lookup_next_index == IP_LOOKUP_NEXT_ICMP_ERROR) + return VNET_API_ERROR_INCORRECT_ADJACENCY_TYPE; + + { + ip_adjacency_t template_adj; + ip4_add_del_route_args_t a; + + memset (&template_adj, 0, sizeof (template_adj)); + + template_adj.lookup_next_index = IP_LOOKUP_NEXT_ICMP_ERROR; + template_adj.if_address_index = ~0; + template_adj.special_adjacency_format_function_index = + srm->special_adjacency_format_function_index; + + rwh = (u8 *) (&template_adj.rewrite_header); + + range = (port_range_t *) rwh; + + if (vec_len (low_ports) > 8 * srm->ranges_per_adjacency) + return VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY; + + j = k = 0; + + for (i = 0; i < vec_len (low_ports); i++) + { + for (; j < srm->ranges_per_adjacency; j++) + { + for (; k < 8; k++) + { + if (range->low.as_u16[k] == 0) + { + range->low.as_u16[k] = low_ports[i]; + range->hi.as_u16[k] = hi_ports[i]; + k++; + if (k == 7) + { + k = 0; + j++; + } + goto doublebreak2; + } + } + k = 0; + range++; + } + j = 0; + /* Too many ports specified... */ + return VNET_API_ERROR_EXCEEDED_NUMBER_OF_PORTS_CAPACITY; + + doublebreak2: ; + } + + memset (&a, 0, sizeof(a)); + a.flags = IP4_ROUTE_FLAG_FIB_INDEX; + a.table_index_or_table_id = fib_index; + a.dst_address = address[0]; + a.dst_address_length = length; + a.add_adj = &template_adj; + a.n_add_adj = 1; + + ip4_add_del_route (im, &a); + } + } + + return 0; +} + +static clib_error_t * +ip_source_and_port_range_check_command_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + u16 * low_ports = 0; + u16 * high_ports = 0; + u16 this_low; + u16 this_hi; + ip4_address_t addr; + u32 length; + u32 tmp, tmp2; + u8 prefix_set = 0; + u32 vrf_id = ~0; + int is_add = 1; + int rv; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U/%d", unformat_ip4_address, &addr, &length)) + prefix_set = 1; + else if (unformat (input, "vrf %d", &vrf_id)) + ; + else if (unformat (input, "del")) + is_add = 0; + else if (unformat (input, "port %d", &tmp)) + { + if (tmp == 0 || tmp > 65535) + return clib_error_return (0, "port %d out of range", tmp); + this_low = tmp; + this_hi = this_low + 1; + vec_add1 (low_ports, this_low); + vec_add1 (high_ports, this_hi); + } + else if (unformat (input, "range %d - %d", &tmp, &tmp2)) + { + if (tmp > tmp2) + return clib_error_return (0, "ports %d and %d out of order", + tmp, tmp2); + if (tmp == 0 || tmp > 65535) + return clib_error_return (0, "low port %d out of range", tmp); + if (tmp2 == 0 || tmp2 > 65535) + return clib_error_return (0, "hi port %d out of range", tmp2); + this_low = tmp; + this_hi = tmp2+1; + vec_add1 (low_ports, this_low); + vec_add1 (high_ports, this_hi); + } + else + break; + } + + if (prefix_set == 0) + return clib_error_return (0, "<address>/<mask> not specified"); + + if (vrf_id == ~0) + return clib_error_return (0, "VRF ID required, not specified"); + + if (vrf_id == 0) + return clib_error_return (0, "VRF ID should not be default. Should be distinct VRF for this purpose. "); + + if (vec_len(low_ports) == 0) + return clib_error_return (0, "At least one port or port range required"); + + rv = ip4_source_and_port_range_check_add_del + (&addr, length, vrf_id, low_ports, high_ports, is_add); + + switch(rv) + { + case 0: + break; + + case VNET_API_ERROR_INCORRECT_ADJACENCY_TYPE: + return clib_error_return + (0, "Incorrect adjacency for add/del operation in ip4 source and port-range check."); + + case VNET_API_ERROR_EXCEEDED_NUMBER_OF_PORTS_CAPACITY: + return clib_error_return + (0, "Too many ports in add/del operation in ip4 source and port-range check."); + + case VNET_API_ERROR_EXCEEDED_NUMBER_OF_RANGES_CAPACITY: + return clib_error_return + (0, "Too many ranges requested for add operation in ip4 source and port-range check."); + + default: + return clib_error_return + (0, "ip4_source_and_port_range_check_add returned an unexpected value: %d", rv); + } + + return 0; +} + +VLIB_CLI_COMMAND (ip_source_and_port_range_check_command, static) = { + .path = "set ip source-and-port-range-check", + .function = ip_source_and_port_range_check_command_fn, + .short_help = + "set ip source-and-port-range-check <ip-addr>/<mask> range <nn>-<nn> vrf <id>", +}; + + +static clib_error_t * +show_source_and_port_range_check_fn (vlib_main_t * vm, + unformat_input_t * input, + vlib_cli_command_t * cmd) +{ + source_range_check_main_t * srm = & source_range_check_main; + ip4_main_t * im = &ip4_main; + ip_lookup_main_t * lm = &im->lookup_main; + port_range_t * range; + u32 fib_index; + ip4_address_t addr; + u8 addr_set = 0; + u32 vrf_id = ~0; + int rv, i, j; + u32 adj_index; + ip_adjacency_t *adj; + u32 port = 0; + u8 * rwh; + uword * p; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "%U", unformat_ip4_address, &addr)) + addr_set = 1; + else if (unformat (input, "vrf %d", &vrf_id)) + ; + else if (unformat (input, "port %d", &port)) + ; + else + break; + } + + if (addr_set == 0) + return clib_error_return (0, "<address> not specified"); + + if (vrf_id == ~0) + return clib_error_return (0, "VRF ID required, not specified"); + + p = hash_get (im->fib_index_by_table_id, vrf_id); + if (p == 0) + return clib_error_return (0, "VRF %d not found", vrf_id); + fib_index = p[0]; + + adj_index = ip4_fib_lookup_with_table + (im, fib_index, &addr, 0 /* disable_default_route */); + + adj = ip_get_adjacency (lm, adj_index); + + if (adj->lookup_next_index != IP_LOOKUP_NEXT_ICMP_ERROR) + { + vlib_cli_output (vm, "%U: src address drop", format_ip4_address, &addr); + return 0; + } + + if (port) + { + rv = check_adj_port_range_x1 (adj, (u16) port, 1234); + if (rv == 1234) + vlib_cli_output (vm, "%U port %d PASS", format_ip4_address, + &addr, port); + else + vlib_cli_output (vm, "%U port %d FAIL", format_ip4_address, + &addr, port); + return 0; + } + else + { + u8 * s; + rwh = (u8 *) (&adj->rewrite_header); + + s = format (0, "%U: ", format_ip4_address, &addr); + + range = (port_range_t *) rwh; + + for (i = 0; i < srm->ranges_per_adjacency; i++) + { + for (j = 0; j < 8; j++) + { + if (range->low.as_u16[j]) + s = format (s, "%d - %d ", (u32) range->low.as_u16[j], + (u32) range->hi.as_u16[j]); + } + range++; + } + vlib_cli_output (vm, "%s", s); + vec_free(s); + } + + return 0; +} + +VLIB_CLI_COMMAND (show_source_and_port_range_check, static) = { + .path = "show ip source-and-port-range-check", + .function = show_source_and_port_range_check_fn, + .short_help = + "show ip source-and-port-range-check vrf <nn> <ip-addr> <port>", +}; |