2 * Recursive Nexthop Iterator test.
3 * This tests the ALL_NEXTHOPS_RO macro.
5 * Copyright (C) 2012 by Open Source Routing.
6 * Copyright (C) 2012 by Internet Systems Consortium, Inc. ("ISC")
8 * This file is part of Quagga
10 * Quagga is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by the
12 * Free Software Foundation; either version 2, or (at your option) any
15 * Quagga is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with Quagga; see the file COPYING. If not, write to the Free
22 * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
27 #include "zebra/rib.h"
30 struct thread_master *master;
34 str_append(char **buf, const char *repr)
38 *buf = realloc(*buf, strlen(*buf) + strlen(repr) + 1);
40 strncpy((*buf) + strlen(*buf), repr, strlen(repr) + 1);
50 str_appendf(char **buf, const char *format, ...)
57 rv = vasprintf(&pbuf, format, ap);
61 str_append(buf, pbuf);
65 /* This structure contains a nexthop chain
66 * and its expected representation */
69 /* Head of the chain */
71 /* Last nexthop in top chain */
72 struct nexthop *current_top;
73 /* Last nexthop in current recursive chain */
74 struct nexthop *current_recursive;
75 /* Expected string representation. */
79 static struct nexthop_chain*
80 nexthop_chain_new(void)
82 struct nexthop_chain *rv;
84 rv = calloc(sizeof(*rv), 1);
90 nexthop_chain_add_top(struct nexthop_chain *nc)
94 nh = calloc(sizeof(*nh), 1);
99 nc->current_top->next = nh;
100 nh->prev = nc->current_top;
101 nc->current_top = nh;
105 nc->head = nc->current_top = nh;
107 nc->current_recursive = NULL;
108 str_appendf(&nc->repr, "%p\n", nh);
112 nexthop_chain_add_recursive(struct nexthop_chain *nc)
116 nh = calloc(sizeof(*nh), 1);
119 assert(nc->current_top);
120 if (nc->current_recursive)
122 nc->current_recursive->next = nh;
123 nh->prev = nc->current_recursive;
124 nc->current_recursive = nh;
128 SET_FLAG(nc->current_top->flags, NEXTHOP_FLAG_RECURSIVE);
129 nc->current_top->resolved = nh;
130 nc->current_recursive = nh;
132 str_appendf(&nc->repr, " %p\n", nh);
136 nexthop_chain_clear(struct nexthop_chain *nc)
138 struct nexthop *tcur, *tnext;
140 for (tcur = nc->head; tcur; tcur = tnext)
143 if (CHECK_FLAG(tcur->flags, NEXTHOP_FLAG_RECURSIVE))
145 struct nexthop *rcur, *rnext;
146 for (rcur = tcur->resolved; rcur; rcur = rnext)
154 nc->head = nc->current_top = nc->current_recursive = NULL;
160 nexthop_chain_free(struct nexthop_chain *nc)
164 nexthop_chain_clear(nc);
168 /* This function builds a string representation of
169 * the nexthop chain using the ALL_NEXTHOPS_RO macro.
170 * It verifies that the ALL_NEXTHOPS_RO macro iterated
171 * correctly over the nexthop chain by comparing the
172 * generated representation with the expected representation.
175 nexthop_chain_verify_iter(struct nexthop_chain *nc)
177 struct nexthop *nh, *tnh;
181 for (ALL_NEXTHOPS_RO(nc->head, nh, tnh, recursing))
184 str_appendf(&repr, " %p\n", nh);
186 str_appendf(&repr, "%p\n", nh);
190 printf("===\n%s", repr);
191 assert((!repr && !nc->repr) || (repr && nc->repr && !strcmp(repr, nc->repr)));
195 /* This test run builds a simple nexthop chain
196 * with some recursive nexthops and verifies that
197 * the iterator works correctly in each stage along
203 struct nexthop_chain *nc;
205 nc = nexthop_chain_new();
206 nexthop_chain_verify_iter(nc);
208 nexthop_chain_add_top(nc);
209 nexthop_chain_verify_iter(nc);
211 nexthop_chain_add_top(nc);
212 nexthop_chain_verify_iter(nc);
214 nexthop_chain_add_recursive(nc);
215 nexthop_chain_verify_iter(nc);
217 nexthop_chain_add_recursive(nc);
218 nexthop_chain_verify_iter(nc);
220 nexthop_chain_add_top(nc);
221 nexthop_chain_verify_iter(nc);
223 nexthop_chain_add_top(nc);
224 nexthop_chain_verify_iter(nc);
226 nexthop_chain_add_top(nc);
227 nexthop_chain_verify_iter(nc);
229 nexthop_chain_add_recursive(nc);
230 nexthop_chain_verify_iter(nc);
232 nexthop_chain_add_recursive(nc);
233 nexthop_chain_verify_iter(nc);
235 nexthop_chain_add_recursive(nc);
236 nexthop_chain_verify_iter(nc);
238 nexthop_chain_free(nc);
241 /* This test run builds numerous random
242 * nexthop chain configurations and verifies
243 * that the iterator correctly progresses
248 struct nexthop_chain *nc;
252 nc = nexthop_chain_new();
255 for (i = 0; i < 1000000; i++)
257 switch (prng_rand(prng) % 10)
260 nexthop_chain_clear(nc);
267 nexthop_chain_add_top(nc);
274 nexthop_chain_add_recursive(nc);
277 nexthop_chain_verify_iter(nc);
279 nexthop_chain_free(nc);
283 int main(int argc, char **argv)
285 if (argc >= 2 && !strcmp("-v", argv[1]))
288 printf("Simple test passed.\n");
290 printf("PRNG test passed.\n");