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SNMP: Fix test

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This commit is contained in:
Vojtech Vilimek 2024-08-21 22:32:49 +02:00
parent 764a912548
commit 3024267924
2 changed files with 59 additions and 66 deletions
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4
proto/snmp/mib_tree.c
View File

@ -677,8 +677,8 @@ mib_tree_walk_oid_compare(const struct mib_walk_state *walk, const struct oid *o
return 1;
}
if (walk_idx == walk_subids)
return 1;
if (walk_idx < ARRAY_SIZE(snmp_internet) + 1)
return -1;
const u8 walk_prefix = walk->stack[walk_idx++]->empty.id;
if (walk_prefix < oid_prefix)

121
proto/snmp/snmp_test.c
View File

@ -84,12 +84,6 @@ oid_create(u8 n_subid, u8 prefix, u8 include, ...)
return result;
}
static u32
xrandom(u32 max)
{
return (bt_random() % max);
}
static u32
oid_random_id(void)
{
@ -99,17 +93,17 @@ oid_random_id(void)
static struct oid *
random_prefixed_oid(void)
{
u32 len = xrandom(OID_MAX_LEN + 1 - (ARRAY_SIZE(snmp_internet) + 1));
u32 len = bt_random_n(OID_MAX_LEN + 1 - (ARRAY_SIZE(snmp_internet) + 1));
u8 prefix = (u8) xrandom(UINT8_MAX + 1);
u8 prefix = (u8) bt_random_n(UINT8_MAX + 1);
if (!prefix)
return oid_create(0, 0, 0, 0);
struct oid *random = tmp_alloc(snmp_oid_size_from_len(len));
/* (xrandom(2) * bt_random()) has 0.5 probability to have value 0 and
/* (bt_random_n(2) * bt_random()) has 0.5 probability to have value 0 and
* 0.5 to have random u32 (including zero) */
oid_init(random, 0, prefix, xrandom(2) * bt_random());
oid_init(random, 0, prefix, bt_random_n(2) * bt_random());
random->n_subid = len;
for (u32 id = 0; id < len; id++)
@ -122,12 +116,12 @@ static struct oid *
random_no_prefix_oid(void)
{
/* probability that the random OID is prefixable is practically zero */
u32 len = xrandom(OID_MAX_LEN + 1);
u32 len = bt_random_n(OID_MAX_LEN + 1);
struct oid *random = tmp_alloc(snmp_oid_size_from_len(len));
/* (xrandom(2) * bt_random()) has 0.5 probability to have value 0 and
/* (bt_random_n(2) * bt_random()) has 0.5 probability to have value 0 and
* 0.5 to have random u32 (including zero) */
oid_init(random, 0, 0, xrandom(2) * bt_random());
oid_init(random, 0, 0, bt_random_n(2) * bt_random());
random->n_subid = len;
for (u32 id = 0; id < len; id++)
@ -140,19 +134,19 @@ static struct oid *
random_prefixable_oid(void)
{
/* generate the len without the snmp_internet prefix included and prefix ID */
u32 len = xrandom(OID_MAX_LEN + 1 - (ARRAY_SIZE(snmp_internet) + 1));
u32 len = bt_random_n(OID_MAX_LEN + 1 - (ARRAY_SIZE(snmp_internet) + 1));
struct oid *random = tmp_alloc(
snmp_oid_size_from_len(len + ARRAY_SIZE(snmp_internet) + 1));
/* (xrandom(2) * bt_random()) has 0.5 probability to have value 0 and
/* (bt_random_n(2) * bt_random()) has 0.5 probability to have value 0 and
* 0.5 to have random u32 (including zero) */
oid_init(random, 0, 0, xrandom(2) * bt_random());
oid_init(random, 0, 0, bt_random_n(2) * bt_random());
random->n_subid = len + ARRAY_SIZE(snmp_internet) + 1;
for (u32 inet_id = 0; inet_id < ARRAY_SIZE(snmp_internet); inet_id++)
random->ids[inet_id] = snmp_internet[inet_id];
random->ids[ARRAY_SIZE(snmp_internet)] = xrandom(UINT8_MAX + 1);
random->ids[ARRAY_SIZE(snmp_internet)] = bt_random_n(UINT8_MAX + 1);
for (u32 id = 0; id < len; id++)
random->ids[id + ARRAY_SIZE(snmp_internet) + 1] = oid_random_id();
@ -163,7 +157,7 @@ random_prefixable_oid(void)
static struct oid *
random_oid(void)
{
u32 option = xrandom(3);
u32 option = bt_random_n(3);
if (option == 0)
return random_prefixed_oid();
@ -422,9 +416,7 @@ t_varbind_name_to_tx(void)
memset(snmp_proto, 0, sizeof(struct snmp_proto));
sock *s = sk_new(&root_pool);
snmp_proto->sock = s;
/* dirty hack sk_alloc_bufs() */
s->tbsize = SNMP_BUFFER_SIZE;
s->tbuf = s->tbuf_alloc = xmalloc(s->tbsize);
sk_set_tbsize(s, SNMP_BUFFER_SIZE);
void *buffer = s->tbuf;
struct snmp_pdu copy = {
@ -535,7 +527,7 @@ continue_testing:
fix_byteorder(work->ids, work->n_subid);
/* include also the prefix ID (at index 4) */
u32 index = xrandom(ARRAY_SIZE(snmp_internet) + 1);
u32 index = bt_random_n(ARRAY_SIZE(snmp_internet) + 1);
/* change randomly picked id at index from 0..5 (included) */
u32 random = bt_random();
if (index == ARRAY_SIZE(snmp_internet) && random > 255)
@ -579,7 +571,7 @@ walk_to_oid_one(pool *pool, const struct oid *oid)
const struct oid *inet_pref = oid_create(1, 0, 0, /* ids */ 1);
mib_tree_remove(tree, inet_pref);
(void) mib_tree_add(pool, tree, oid, xrandom(2));
(void) mib_tree_add(pool, tree, oid, bt_random_n(2));
mib_tree_find(tree, &walk, oid);
char buf[1024];
@ -722,7 +714,7 @@ generate_raw_oids(struct oid *oids[], int size, struct oid *(*generator)(void))
for (int i = 0; i < size; i++)
{
/* binary version of ~5% */
if (i > 0 && xrandom(256) <= 13)
if (i > 0 && bt_random_n(256) <= 13)
{
/* at this chance, we create a copy instead of generating new oid */
oids[i] = tmp_alloc(snmp_oid_size(oids[i-1]));
@ -782,7 +774,7 @@ t_walk_oid_desc(void)
for (int test = 0; test < size; test++)
{
int i = xrandom(size);
int i = bt_random_n(size);
char buffer[1024];
struct oid *oid = (struct oid *) buffer;
@ -793,7 +785,7 @@ t_walk_oid_desc(void)
mib_tree_walk_init(&walk, NULL);
(void) mib_tree_find(tree, &walk, oid);
int type = xrandom(4);
int type = bt_random_n(4);
switch (type)
{
case 0:
@ -809,11 +801,11 @@ t_walk_oid_desc(void)
if (!upto)
continue;
u32 new = xrandom(upto) + 1;
u32 new = bt_random_n(upto) + 1;
oid->n_subid = ids + new;
for (u32 i = 0; i < new; i++)
oid->ids[ids + i] = xrandom(OID_MAX_ID);
oid->ids[ids + i] = bt_random_n(OID_MAX_ID);
bt_assert(mib_tree_walk_is_oid_descendant(&walk, oid) > 0);
@ -828,12 +820,12 @@ t_walk_oid_desc(void)
if (ids == 0 || ids == OID_MAX_LEN)
continue;
u32 split = (ids > 1) ? xrandom(ids - 1) + 1 : 0;
u32 ext = (type == 3) ? xrandom(MIN(OID_MAX_LEN - ids, 16)) : 0;
u32 split = (ids > 1) ? bt_random_n(ids - 1) + 1 : 0;
u32 ext = (type == 3) ? bt_random_n(MIN(OID_MAX_LEN - ids, 16)) : 0;
oid->n_subid = split + ext;
for (u32 i = 0; i < ext; i++)
oid->ids[split + i] = xrandom(OID_MAX_ID);
oid->ids[split + i] = bt_random_n(OID_MAX_ID);
int no_change = 1;
for (u32 j = 0; j < MIN(ids - split, ext); j++)
@ -857,12 +849,14 @@ t_walk_oid_desc(void)
u32 zero = 0;
const struct oid *null_oid = (struct oid *) &zero;
u32 index = xrandom(size);
u32 index = bt_random_n(size);
bt_assert(mib_tree_walk_is_oid_descendant(&walk, null_oid) == 0);
bt_assert(mib_tree_walk_is_oid_descendant(&walk, oids[index]) > 0);
if (!snmp_is_oid_empty(oids[index]))
bt_assert(mib_tree_walk_is_oid_descendant(&walk, oids[index]) > 0);
(void) mib_tree_find(tree, &walk, oids[index]);
bt_assert(mib_tree_walk_is_oid_descendant(&walk, null_oid) < 0);
if (!snmp_is_oid_empty(oids[index]))
bt_assert(mib_tree_walk_is_oid_descendant(&walk, null_oid) < 0);
}
u32 null_oid = 0;
@ -896,7 +890,7 @@ t_walk_oid_compare(void)
for (int test = 0; test < size; test++)
{
int i = xrandom(size);
int i = bt_random_n(size);
char buffer[1024];
struct oid *oid = (struct oid *) buffer;
@ -907,7 +901,7 @@ t_walk_oid_compare(void)
mib_tree_walk_init(&walk, NULL);
(void) mib_tree_find(tree, &walk, oids[i]);
int type = xrandom(4);
int type = bt_random_n(4);
switch (type)
{
case 0:
@ -923,12 +917,12 @@ t_walk_oid_compare(void)
if (!upto)
continue;
u32 new = xrandom(upto) + 1;
u32 new = bt_random_n(upto) + 1;
oid->n_subid = ids + new;
ASSERT(snmp_oid_size(oid) < 1024);
for (u32 i = 0; i < new; i++)
oid->ids[ids + i] = xrandom(OID_MAX_ID);
oid->ids[ids + i] = bt_random_n(OID_MAX_ID);
bt_assert(mib_tree_walk_oid_compare(&walk, oid) < 0);
@ -943,12 +937,12 @@ t_walk_oid_compare(void)
if (ids == 0 || ids == OID_MAX_LEN)
continue;
u32 split = (ids > 1) ? xrandom(ids - 1) + 1 : 0;
u32 ext = (type == 3) ? xrandom(MIN(OID_MAX_LEN - ids, 16)) : 0;
u32 split = (ids > 1) ? bt_random_n(ids - 1) + 1 : 0;
u32 ext = (type == 3) ? bt_random_n(MIN(OID_MAX_LEN - ids, 16)) : 0;
oid->n_subid = split + ext;
for (u32 i = 0; i < ext; i++)
oid->ids[split + i] = xrandom(OID_MAX_ID);
oid->ids[split + i] = bt_random_n(OID_MAX_ID);
int cmp_res = 0;
for (u32 j = 0; j < MIN(ids - split, ext) && !cmp_res; j++)
@ -957,10 +951,10 @@ t_walk_oid_compare(void)
if (!cmp_res && split + ext == ids)
continue;
if (!cmp_res && split < ids && ext == 0)
if (!cmp_res && split + ext < ids)
cmp_res = +1;
if (!cmp_res && split < ids && split + ext > ids)
if (!cmp_res && split + ext > ids)
cmp_res = -1;
if (cmp_res < 0)
@ -980,12 +974,16 @@ t_walk_oid_compare(void)
u32 zero = 0;
const struct oid *null_oid = (struct oid *) &zero;
u32 index = xrandom(size);
u32 index = bt_random_n(size);
bt_assert(mib_tree_walk_oid_compare(&walk, null_oid) == 0);
bt_assert(mib_tree_walk_oid_compare(&walk, oids[index]) < 0);
if (!snmp_is_oid_empty(oids[index]))
bt_assert(mib_tree_walk_oid_compare(&walk, oids[index]) < 0);
else
bt_assert(mib_tree_walk_oid_compare(&walk, oids[index]) == 0);
(void) mib_tree_find(tree, &walk, oids[index]);
bt_assert(mib_tree_walk_oid_compare(&walk, null_oid) > 0);
if (!snmp_is_oid_empty(oids[index]))
bt_assert(mib_tree_walk_oid_compare(&walk, null_oid) > 0);
}
u32 null_oid = 0;
@ -1109,7 +1107,7 @@ gen_test_add(struct oid *(*generator)(void))
for (int i = 0; i < size; i++)
{
int invalid = 0;
int is_leaf = (with_leafs) ? (int) xrandom(2) : 0;
int is_leaf = (with_leafs) ? (int) bt_random_n(2) : 0;
types[i] = (byte) is_leaf;
int will_cut = 0;
@ -1252,7 +1250,7 @@ gen_test_find(struct oid *(*generator)(void))
}
for (int i = 0; i < size; i++)
types[i] = (byte) ((with_leafs) ? xrandom(2) : 0);
types[i] = (byte) ((with_leafs) ? bt_random_n(2) : 0);
/*
* by default initialized MIB tree will have internet prefix have inserted
@ -1384,8 +1382,8 @@ gen_test_find(struct oid *(*generator)(void))
if (subids > 0)
{
found = NULL;
u32 new_ids = xrandom(subids);
mib_tree_walk_init(&walk, (xrandom(2)) ? tree : NULL);
u32 new_ids = bt_random_n(subids);
mib_tree_walk_init(&walk, (bt_random_n(2)) ? tree : NULL);
oids[i]->n_subid = new_ids;
@ -1410,7 +1408,8 @@ gen_test_find(struct oid *(*generator)(void))
for (int search = 0; search < size; search++)
{
int has_node = 0;
int has_node = snmp_is_oid_empty(searched[search]);
for (int stored = 0; stored < size; stored++)
{
char buf[1024];
@ -1448,7 +1447,6 @@ gen_test_find(struct oid *(*generator)(void))
struct mib_walk_state walk;
mib_tree_walk_init(&walk, NULL);
//mib_tree_walk_init(&walk, tree); /* TODO should work also like this */
mib_node_u *found = mib_tree_find(tree, &walk, searched[search]);
bt_assert(has_node == (found != NULL));
@ -1461,8 +1459,8 @@ gen_test_find(struct oid *(*generator)(void))
if (subids > 0)
{
found = NULL;
u32 new_ids = xrandom(subids);
mib_tree_walk_init(&walk, (xrandom(2)) ? tree : NULL);
u32 new_ids = bt_random_n(subids);
mib_tree_walk_init(&walk, (bt_random_n(2)) ? tree : NULL);
searched[search]->n_subid = new_ids;
@ -1571,7 +1569,7 @@ gen_test_delete_remove(struct oid *(*generator)(void), int remove)
for (int i = 0; i < size; i++)
{
int is_leaf;
is_leaf = types[i] = (byte) (with_leafs) ? xrandom(2) : 0;
is_leaf = types[i] = (byte) (with_leafs) ? bt_random_n(2) : 0;
(void) mib_tree_add(pool, tree, oids[i], is_leaf);
}
@ -1598,14 +1596,14 @@ gen_test_delete_remove(struct oid *(*generator)(void), int remove)
/* test deletion one of the inserted OIDs */
for (int round = 0; round < (size + 3) / 4 + remove; round++)
{
/* note: we do not run any rounds for size zero because xrandom(0)
/* note: we do not run any rounds for size zero because bt_random_n(0)
* does not exist */
int i;
struct oid *oid;
if (!remove)
{
/* this way we are also testing remove non-existent tree nodes */
i = xrandom(size); /* not xrandom(distinct) */
i = bt_random_n(size); /* not bt_random_n(distinct) */
oid = oids[i];
}
else
@ -1728,7 +1726,7 @@ gen_test_traverse(struct oid *(*generator)(void))
for (int o = 0; o < size; o++)
{
int is_leaf = (with_leafs) ? (int) xrandom(2) : 0;
int is_leaf = (with_leafs) ? (int) bt_random_n(2) : 0;
(void) mib_tree_add(pool, tree, oids[o], is_leaf);
}
@ -1847,7 +1845,7 @@ gen_test_leafs(struct oid *(*generator)(void))
for (int o = 0; o < size; o++)
{
int is_leaf = (with_leafs) ? (int) xrandom(2) : 0;
int is_leaf = (with_leafs) ? (int) bt_random_n(2) : 0;
(void) mib_tree_add(pool, tree, oids[o], is_leaf);
}
@ -1947,11 +1945,6 @@ int main(int argc, char **argv)
bt_init(argc, argv);
bt_bird_init();
//unsigned seed = rand();
unsigned seed = 1000789714;
log("random seed is %d", seed);
srandom(seed);
bt_test_suite(t_oid_empty, "Function that determines if the OID is empty");
bt_test_suite(t_oid_compare, "Function defining lexicographical order on OIDs");
bt_test_suite(t_varbind_name_to_tx, "Function loading OID from RX buffer with prefixation");