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tor/src/test/test_policy.c

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/* Copyright (c) 2013-2015, The Tor Project, Inc. */
/* See LICENSE for licensing information */
#include "or.h"
#include "router.h"
#include "routerparse.h"
#include "policies.h"
#include "test.h"
/* Helper: assert that short_policy parses and writes back out as itself,
or as <b>expected</b> if that's provided. */
static void
test_short_policy_parse(const char *input,
const char *expected)
{
short_policy_t *short_policy = NULL;
char *out = NULL;
if (expected == NULL)
expected = input;
short_policy = parse_short_policy(input);
tt_assert(short_policy);
out = write_short_policy(short_policy);
tt_str_op(out, OP_EQ, expected);
done:
tor_free(out);
short_policy_free(short_policy);
}
/** Helper: Parse the exit policy string in <b>policy_str</b>, and make sure
* that policies_summarize() produces the string <b>expected_summary</b> from
* it. */
static void
test_policy_summary_helper(const char *policy_str,
const char *expected_summary)
{
config_line_t line;
smartlist_t *policy = smartlist_new();
char *summary = NULL;
char *summary_after = NULL;
int r;
short_policy_t *short_policy = NULL;
line.key = (char*)"foo";
line.value = (char *)policy_str;
line.next = NULL;
r = policies_parse_exit_policy(&line, &policy,
EXIT_POLICY_IPV6_ENABLED |
EXIT_POLICY_ADD_DEFAULT ,0);
tt_int_op(r,OP_EQ, 0);
summary = policy_summarize(policy, AF_INET);
tt_assert(summary != NULL);
tt_str_op(summary,OP_EQ, expected_summary);
short_policy = parse_short_policy(summary);
tt_assert(short_policy);
summary_after = write_short_policy(short_policy);
tt_str_op(summary,OP_EQ, summary_after);
done:
tor_free(summary_after);
tor_free(summary);
if (policy)
addr_policy_list_free(policy);
short_policy_free(short_policy);
}
/** Run unit tests for generating summary lines of exit policies */
static void
test_policies_general(void *arg)
{
int i;
smartlist_t *policy = NULL, *policy2 = NULL, *policy3 = NULL,
*policy4 = NULL, *policy5 = NULL, *policy6 = NULL,
*policy7 = NULL;
addr_policy_t *p;
tor_addr_t tar;
config_line_t line;
smartlist_t *sm = NULL;
char *policy_str = NULL;
short_policy_t *short_parsed = NULL;
(void)arg;
policy = smartlist_new();
p = router_parse_addr_policy_item_from_string("reject 192.168.0.0/16:*",-1);
tt_assert(p != NULL);
tt_int_op(ADDR_POLICY_REJECT,OP_EQ, p->policy_type);
tor_addr_from_ipv4h(&tar, 0xc0a80000u);
tt_int_op(0,OP_EQ, tor_addr_compare(&p->addr, &tar, CMP_EXACT));
tt_int_op(16,OP_EQ, p->maskbits);
tt_int_op(1,OP_EQ, p->prt_min);
tt_int_op(65535,OP_EQ, p->prt_max);
smartlist_add(policy, p);
tor_addr_from_ipv4h(&tar, 0x01020304u);
tt_assert(ADDR_POLICY_ACCEPTED ==
compare_tor_addr_to_addr_policy(&tar, 2, policy));
tor_addr_make_unspec(&tar);
tt_assert(ADDR_POLICY_PROBABLY_ACCEPTED ==
compare_tor_addr_to_addr_policy(&tar, 2, policy));
tor_addr_from_ipv4h(&tar, 0xc0a80102);
tt_assert(ADDR_POLICY_REJECTED ==
compare_tor_addr_to_addr_policy(&tar, 2, policy));
tt_int_op(0, OP_EQ, policies_parse_exit_policy(NULL, &policy2,
EXIT_POLICY_IPV6_ENABLED |
EXIT_POLICY_REJECT_PRIVATE |
EXIT_POLICY_ADD_DEFAULT, 0));
tt_assert(policy2);
policy3 = smartlist_new();
p = router_parse_addr_policy_item_from_string("reject *:*",-1);
tt_assert(p != NULL);
smartlist_add(policy3, p);
p = router_parse_addr_policy_item_from_string("accept *:*",-1);
tt_assert(p != NULL);
smartlist_add(policy3, p);
policy4 = smartlist_new();
p = router_parse_addr_policy_item_from_string("accept *:443",-1);
tt_assert(p != NULL);
smartlist_add(policy4, p);
p = router_parse_addr_policy_item_from_string("accept *:443",-1);
tt_assert(p != NULL);
smartlist_add(policy4, p);
policy5 = smartlist_new();
p = router_parse_addr_policy_item_from_string("reject 0.0.0.0/8:*",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject 169.254.0.0/16:*",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject 127.0.0.0/8:*",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject 192.168.0.0/16:*",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject 10.0.0.0/8:*",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject 172.16.0.0/12:*",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject 80.190.250.90:*",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject *:1-65534",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("reject *:65535",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
p = router_parse_addr_policy_item_from_string("accept *:1-65535",-1);
tt_assert(p != NULL);
smartlist_add(policy5, p);
policy6 = smartlist_new();
p = router_parse_addr_policy_item_from_string("accept 43.3.0.0/9:*",-1);
tt_assert(p != NULL);
smartlist_add(policy6, p);
policy7 = smartlist_new();
p = router_parse_addr_policy_item_from_string("accept 0.0.0.0/8:*",-1);
tt_assert(p != NULL);
smartlist_add(policy7, p);
tt_assert(!exit_policy_is_general_exit(policy));
tt_assert(exit_policy_is_general_exit(policy2));
tt_assert(!exit_policy_is_general_exit(NULL));
tt_assert(!exit_policy_is_general_exit(policy3));
tt_assert(!exit_policy_is_general_exit(policy4));
tt_assert(!exit_policy_is_general_exit(policy5));
tt_assert(!exit_policy_is_general_exit(policy6));
tt_assert(!exit_policy_is_general_exit(policy7));
tt_assert(cmp_addr_policies(policy, policy2));
tt_assert(cmp_addr_policies(policy, NULL));
tt_assert(!cmp_addr_policies(policy2, policy2));
tt_assert(!cmp_addr_policies(NULL, NULL));
tt_assert(!policy_is_reject_star(policy2, AF_INET));
tt_assert(policy_is_reject_star(policy, AF_INET));
tt_assert(policy_is_reject_star(NULL, AF_INET));
addr_policy_list_free(policy);
policy = NULL;
/* make sure compacting logic works. */
policy = NULL;
line.key = (char*)"foo";
line.value = (char*)"accept *:80,reject private:*,reject *:*";
line.next = NULL;
tt_int_op(0, OP_EQ, policies_parse_exit_policy(&line,&policy,
EXIT_POLICY_IPV6_ENABLED |
EXIT_POLICY_ADD_DEFAULT,0));
tt_assert(policy);
//test_streq(policy->string, "accept *:80");
//test_streq(policy->next->string, "reject *:*");
tt_int_op(smartlist_len(policy),OP_EQ, 4);
/* test policy summaries */
/* check if we properly ignore private IP addresses */
test_policy_summary_helper("reject 192.168.0.0/16:*,"
"reject 0.0.0.0/8:*,"
"reject 10.0.0.0/8:*,"
"accept *:10-30,"
"accept *:90,"
"reject *:*",
"accept 10-30,90");
/* check all accept policies, and proper counting of rejects */
test_policy_summary_helper("reject 11.0.0.0/9:80,"
"reject 12.0.0.0/9:80,"
"reject 13.0.0.0/9:80,"
"reject 14.0.0.0/9:80,"
"accept *:*", "accept 1-65535");
test_policy_summary_helper("reject 11.0.0.0/9:80,"
"reject 12.0.0.0/9:80,"
"reject 13.0.0.0/9:80,"
"reject 14.0.0.0/9:80,"
"reject 15.0.0.0:81,"
"accept *:*", "accept 1-65535");
test_policy_summary_helper("reject 11.0.0.0/9:80,"
"reject 12.0.0.0/9:80,"
"reject 13.0.0.0/9:80,"
"reject 14.0.0.0/9:80,"
"reject 15.0.0.0:80,"
"accept *:*",
"reject 80");
/* no exits */
test_policy_summary_helper("accept 11.0.0.0/9:80,"
"reject *:*",
"reject 1-65535");
/* port merging */
test_policy_summary_helper("accept *:80,"
"accept *:81,"
"accept *:100-110,"
"accept *:111,"
"reject *:*",
"accept 80-81,100-111");
/* border ports */
test_policy_summary_helper("accept *:1,"
"accept *:3,"
"accept *:65535,"
"reject *:*",
"accept 1,3,65535");
/* holes */
test_policy_summary_helper("accept *:1,"
"accept *:3,"
"accept *:5,"
"accept *:7,"
"reject *:*",
"accept 1,3,5,7");
test_policy_summary_helper("reject *:1,"
"reject *:3,"
"reject *:5,"
"reject *:7,"
"accept *:*",
"reject 1,3,5,7");
/* Short policies with unrecognized formats should get accepted. */
test_short_policy_parse("accept fred,2,3-5", "accept 2,3-5");
test_short_policy_parse("accept 2,fred,3", "accept 2,3");
test_short_policy_parse("accept 2,fred,3,bob", "accept 2,3");
test_short_policy_parse("accept 2,-3,500-600", "accept 2,500-600");
/* Short policies with nil entries are accepted too. */
test_short_policy_parse("accept 1,,3", "accept 1,3");
test_short_policy_parse("accept 100-200,,", "accept 100-200");
test_short_policy_parse("reject ,1-10,,,,30-40", "reject 1-10,30-40");
/* Try parsing various broken short policies */
#define TT_BAD_SHORT_POLICY(s) \
do { \
tt_ptr_op(NULL, OP_EQ, (short_parsed = parse_short_policy((s)))); \
} while (0)
TT_BAD_SHORT_POLICY("accept 200-199");
TT_BAD_SHORT_POLICY("");
TT_BAD_SHORT_POLICY("rejekt 1,2,3");
TT_BAD_SHORT_POLICY("reject ");
TT_BAD_SHORT_POLICY("reject");
TT_BAD_SHORT_POLICY("rej");
TT_BAD_SHORT_POLICY("accept 2,3,100000");
TT_BAD_SHORT_POLICY("accept 2,3x,4");
TT_BAD_SHORT_POLICY("accept 2,3x,4");
TT_BAD_SHORT_POLICY("accept 2-");
TT_BAD_SHORT_POLICY("accept 2-x");
TT_BAD_SHORT_POLICY("accept 1-,3");
TT_BAD_SHORT_POLICY("accept 1-,3");
/* Test a too-long policy. */
{
int i;
char *policy = NULL;
smartlist_t *chunks = smartlist_new();
smartlist_add(chunks, tor_strdup("accept "));
for (i=1; i<10000; ++i)
smartlist_add_asprintf(chunks, "%d,", i);
smartlist_add(chunks, tor_strdup("20000"));
policy = smartlist_join_strings(chunks, "", 0, NULL);
SMARTLIST_FOREACH(chunks, char *, ch, tor_free(ch));
smartlist_free(chunks);
short_parsed = parse_short_policy(policy);/* shouldn't be accepted */
tor_free(policy);
tt_ptr_op(NULL, OP_EQ, short_parsed);
}
/* truncation ports */
sm = smartlist_new();
for (i=1; i<2000; i+=2) {
char buf[POLICY_BUF_LEN];
tor_snprintf(buf, sizeof(buf), "reject *:%d", i);
smartlist_add(sm, tor_strdup(buf));
}
smartlist_add(sm, tor_strdup("accept *:*"));
policy_str = smartlist_join_strings(sm, ",", 0, NULL);
test_policy_summary_helper( policy_str,
"accept 2,4,6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,"
"46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86,88,90,"
"92,94,96,98,100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,"
"130,132,134,136,138,140,142,144,146,148,150,152,154,156,158,160,162,164,"
"166,168,170,172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,"
"202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,"
"238,240,242,244,246,248,250,252,254,256,258,260,262,264,266,268,270,272,"
"274,276,278,280,282,284,286,288,290,292,294,296,298,300,302,304,306,308,"
"310,312,314,316,318,320,322,324,326,328,330,332,334,336,338,340,342,344,"
"346,348,350,352,354,356,358,360,362,364,366,368,370,372,374,376,378,380,"
"382,384,386,388,390,392,394,396,398,400,402,404,406,408,410,412,414,416,"
"418,420,422,424,426,428,430,432,434,436,438,440,442,444,446,448,450,452,"
"454,456,458,460,462,464,466,468,470,472,474,476,478,480,482,484,486,488,"
"490,492,494,496,498,500,502,504,506,508,510,512,514,516,518,520,522");
done:
addr_policy_list_free(policy);
addr_policy_list_free(policy2);
addr_policy_list_free(policy3);
addr_policy_list_free(policy4);
addr_policy_list_free(policy5);
addr_policy_list_free(policy6);
addr_policy_list_free(policy7);
tor_free(policy_str);
if (sm) {
SMARTLIST_FOREACH(sm, char *, s, tor_free(s));
smartlist_free(sm);
}
short_policy_free(short_parsed);
}
static void
test_dump_exit_policy_to_string(void *arg)
{
char *ep;
addr_policy_t *policy_entry;
routerinfo_t *ri = tor_malloc_zero(sizeof(routerinfo_t));
(void)arg;
ri->policy_is_reject_star = 1;
ri->exit_policy = NULL; // expecting "reject *:*"
ep = router_dump_exit_policy_to_string(ri,1,1);
tt_str_op("reject *:*",OP_EQ, ep);
tor_free(ep);
ri->exit_policy = smartlist_new();
ri->policy_is_reject_star = 0;
policy_entry = router_parse_addr_policy_item_from_string("accept *:*",-1);
smartlist_add(ri->exit_policy,policy_entry);
ep = router_dump_exit_policy_to_string(ri,1,1);
tt_str_op("accept *:*",OP_EQ, ep);
tor_free(ep);
policy_entry = router_parse_addr_policy_item_from_string("reject *:25",-1);
smartlist_add(ri->exit_policy,policy_entry);
ep = router_dump_exit_policy_to_string(ri,1,1);
tt_str_op("accept *:*\nreject *:25",OP_EQ, ep);
tor_free(ep);
policy_entry =
router_parse_addr_policy_item_from_string("reject 8.8.8.8:*",-1);
smartlist_add(ri->exit_policy,policy_entry);
ep = router_dump_exit_policy_to_string(ri,1,1);
tt_str_op("accept *:*\nreject *:25\nreject 8.8.8.8:*",OP_EQ, ep);
tor_free(ep);
policy_entry =
router_parse_addr_policy_item_from_string("reject6 [FC00::]/7:*",-1);
smartlist_add(ri->exit_policy,policy_entry);
ep = router_dump_exit_policy_to_string(ri,1,1);
tt_str_op("accept *:*\nreject *:25\nreject 8.8.8.8:*\n"
"reject6 [fc00::]/7:*",OP_EQ, ep);
tor_free(ep);
policy_entry =
router_parse_addr_policy_item_from_string("accept6 [c000::]/3:*",-1);
smartlist_add(ri->exit_policy,policy_entry);
ep = router_dump_exit_policy_to_string(ri,1,1);
tt_str_op("accept *:*\nreject *:25\nreject 8.8.8.8:*\n"
"reject6 [fc00::]/7:*\naccept6 [c000::]/3:*",OP_EQ, ep);
done:
if (ri->exit_policy) {
SMARTLIST_FOREACH(ri->exit_policy, addr_policy_t *,
entry, addr_policy_free(entry));
smartlist_free(ri->exit_policy);
}
tor_free(ri);
tor_free(ep);
}
struct testcase_t policy_tests[] = {
{ "router_dump_exit_policy_to_string", test_dump_exit_policy_to_string, 0,
NULL, NULL },
{ "general", test_policies_general, 0, NULL, NULL },
END_OF_TESTCASES
};
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