diff options
Diffstat (limited to 'vnet/vnet/ip/ip4_test.c')
-rw-r--r-- | vnet/vnet/ip/ip4_test.c | 311 |
1 files changed, 311 insertions, 0 deletions
diff --git a/vnet/vnet/ip/ip4_test.c b/vnet/vnet/ip/ip4_test.c new file mode 100644 index 00000000000..ff088e78f3e --- /dev/null +++ b/vnet/vnet/ip/ip4_test.c @@ -0,0 +1,311 @@ +/* + * Copyright (c) 2015 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> +#include <vnet/ethernet/ethernet.h> + +/* + * ip4 FIB tester. Add, probe, delete a bunch of + * random routes / masks and make sure that the mtrie agrees with + * the hash-table FIB. + * + * Manipulate the FIB by means of the debug CLI commands, to minimize + * the chances of doing something idiotic. + */ + +/* + * These routines need to be redeclared non-static elsewhere. + * + * Also: rename ip_route() -> vnet_ip_route_cmd() and add the usual + * test_route_init() call to main.c + */ +clib_error_t * +vnet_ip_route_cmd (vlib_main_t * vm, + unformat_input_t * input, vlib_cli_command_t * cmd_arg); + +int ip4_lookup_validate (ip4_address_t *a, u32 fib_index0); + +ip4_fib_t * +find_fib_by_table_index_or_id (ip4_main_t * im, u32 table_index_or_id, + u32 flags); + +/* Routes to insert/delete/probe in FIB */ +typedef struct { + ip4_address_t address; + u32 mask_width; + u32 interface_id; /* not an xx_if_index */ +} test_route_t; + +typedef struct { + /* Test routes in use */ + test_route_t *route_pool; + + /* Number of fake ethernets created */ + u32 test_interfaces_created; +} test_main_t; + +test_main_t test_main; + +/* fake ethernet device class, distinct from "fake-ethX" */ +static u8 * format_test_interface_name (u8 * s, va_list * args) +{ + u32 dev_instance = va_arg (*args, u32); + return format (s, "test-eth%d", dev_instance); +} + +static uword dummy_interface_tx (vlib_main_t * vm, + vlib_node_runtime_t * node, + vlib_frame_t * frame) +{ + clib_warning ("you shouldn't be here, leaking buffers..."); + return frame->n_vectors; +} + +VNET_DEVICE_CLASS (test_interface_device_class,static) = { + .name = "Test interface", + .format_device_name = format_test_interface_name, + .tx_function = dummy_interface_tx, +}; + +static clib_error_t * +thrash (vlib_main_t * vm, + unformat_input_t * main_input, vlib_cli_command_t * cmd_arg) +{ + u32 seed = 0xdeaddabe; + u32 niter = 10; + u32 nroutes = 10; + u32 ninterfaces = 4; + f64 min_mask_bits = 7.0; + f64 max_mask_bits = 32.0; + u32 table_id = 11; /* my amp goes to 11 (use fib 11) */ + u32 table_index; + int iter, i; + u8 * cmd; + test_route_t *tr; + test_main_t *tm = &test_main; + ip4_main_t * im = &ip4_main; + vnet_main_t * vnm = vnet_get_main(); + unformat_input_t cmd_input; + f64 rf; + u32 *masks = 0; + u32 tmp; + u32 hw_if_index; + clib_error_t * error = 0; + uword *p; + unformat_input_t _line_input, * line_input = &_line_input; + u8 hw_address[6]; + ip4_fib_t * fib; + int verbose = 0; + + /* Precompute mask width -> mask vector */ + tmp = (u32)~0; + vec_validate (masks, 32); + for (i = 32; i > 0; i--) + { + masks [i] = tmp; + tmp <<= 1; + } + + if (unformat_user (main_input, unformat_line_input, line_input)) + { + while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (line_input, "seed %d", &seed)) + ; + else if (unformat (line_input, "niter %d", &niter)) + ; + else if (unformat (line_input, "nroutes %d", &nroutes)) + ; + else if (unformat (line_input, "ninterfaces %d", &ninterfaces)) + ; + else if (unformat (line_input, "min-mask-bits %d", &tmp)) + min_mask_bits = (f64) tmp; + else if (unformat (line_input, "max-mask-bits %d", &tmp)) + max_mask_bits = (f64) tmp; + else if (unformat (line_input, "verbose")) + verbose = 1; + else + return clib_error_return (0, "unknown input `%U'", + format_unformat_error, line_input); + } + } + + /* Find or create FIB table 11 */ + fib = find_ip4_fib_by_table_index_or_id (im, table_id, IP4_ROUTE_FLAG_TABLE_ID); + + for (i = tm->test_interfaces_created; i < ninterfaces; i++) + { + vnet_hw_interface_t * hw; + memset (hw_address, 0, sizeof (hw_address)); + hw_address[0] = 0xd0; + hw_address[1] = 0x0f; + hw_address[5] = i; + + error = ethernet_register_interface + (vnm, + test_interface_device_class.index, + i /* instance */, + hw_address, + &hw_if_index, + /* flag change */ 0); + + /* Fake interfaces use FIB table 11 */ + hw = vnet_get_hw_interface (vnm, hw_if_index); + vec_validate (im->fib_index_by_sw_if_index, hw->sw_if_index); + im->fib_index_by_sw_if_index[hw->sw_if_index] = fib->index; + } + + tm->test_interfaces_created = ninterfaces; + + /* Find fib index corresponding to FIB id 11 */ + p = hash_get (im->fib_index_by_table_id, table_id); + if (p == 0) + { + vlib_cli_output (vm, "Couldn't map fib id %d to fib index\n", + table_id); + return 0; + } + table_index = p[0]; + + for (iter = 0; iter < niter; iter++) + { + /* Pick random routes to install */ + for (i = 0; i < nroutes; i++) + { + int j; + + pool_get (tm->route_pool, tr); + memset (tr, 0, sizeof (*tr)); + + again: + rf = random_f64 (&seed); + tr->mask_width = (u32) (min_mask_bits + + rf * (max_mask_bits - min_mask_bits)); + tmp = random_u32 (&seed); + tmp &= masks[tr->mask_width]; + tr->address.as_u32 = clib_host_to_net_u32(tmp); + + /* We can't add the same address/mask twice... */ + for (j = 0; j < i; j++) + { + test_route_t *prev; + prev = pool_elt_at_index (tm->route_pool, j); + if ((prev->address.as_u32 == tr->address.as_u32) + && (prev->mask_width == tr->mask_width)) + goto again; + } + + rf = random_f64 (&seed); + tr->interface_id = (u32) (rf * ninterfaces); + } + + /* Add them */ + for (i = 0; i < nroutes; i++) + { + tr = pool_elt_at_index (tm->route_pool, i); + cmd = format (0, "add table %d %U/%d via test-eth%d", + table_id, + format_ip4_address, &tr->address, + tr->mask_width, tr->interface_id); + vec_add1(cmd,0); + if (verbose) + fformat(stderr, "ip route %s\n", cmd); + unformat_init_string (&cmd_input, (char *) cmd, vec_len(cmd)-1); + error = vnet_ip_route_cmd (vm, &cmd_input, cmd_arg); + if (error) + clib_error_report(error); + unformat_free (&cmd_input); + vec_free(cmd); + } + /* Probe them */ + for (i = 0; i < nroutes; i++) + { + tr = pool_elt_at_index (tm->route_pool, i); + if (!ip4_lookup_validate (&tr->address, table_index)) + { + if (verbose) + fformat (stderr, "test lookup table %d %U\n", + table_index, format_ip4_address, &tr->address); + + fformat (stderr, "FAIL-after-insert: %U/%d\n", + format_ip4_address, &tr->address, + tr->mask_width); + } + } + + /* Delete them */ + for (i = 0; i < nroutes; i++) + { + int j; + tr = pool_elt_at_index (tm->route_pool, i); + if (0) + cmd = format (0, "del table %d %U/%d via test-eth%d", + table_id, + format_ip4_address, &tr->address, + tr->mask_width, tr->interface_id); + else + cmd = format (0, "del table %d %U/%d", + table_id, + format_ip4_address, &tr->address, + tr->mask_width); + vec_add1(cmd,0); + if (verbose) + fformat(stderr, "ip route %s\n", cmd); + unformat_init_string (&cmd_input, (char *) cmd, vec_len(cmd)-1); + error = vnet_ip_route_cmd (vm, &cmd_input, cmd_arg); + if (error) + clib_error_report(error); + unformat_free (&cmd_input); + vec_free(cmd); + + /* Make sure all undeleted routes still work */ + for (j = i+1; j < nroutes; j++) + { + test_route_t *rr; /* remaining route */ + rr = pool_elt_at_index (tm->route_pool, j); + if (!ip4_lookup_validate (&rr->address, table_index)) + { + if (verbose) + fformat (stderr, "test lookup table %d %U\n", + table_index, format_ip4_address, &rr->address); + + fformat (stderr, "FAIL: %U/%d AWOL\n", + format_ip4_address, &rr->address, + rr->mask_width); + fformat (stderr, " iter %d after %d of %d deletes\n", + iter, i, nroutes); + fformat (stderr, " last route deleted %U/%d\n", + format_ip4_address, &tr->address, + tr->mask_width); + } + } + } + + pool_free (tm->route_pool); + } + return 0; +} + +VLIB_CLI_COMMAND (test_route_command, static) = { + .path = "test route", + .short_help = "test route", + .function = thrash, +}; + +clib_error_t *test_route_init (vlib_main_t *vm) +{ + return 0; +} + +VLIB_INIT_FUNCTION (test_route_init); |