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Add a few comments, print prefixes after aggregation

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This commit is contained in:
Igor Putovny 2023-10-06 12:52:08 +02:00
parent 7657d05592
commit ec1eb83bf0
1 changed files with 58 additions and 5 deletions
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63
proto/aggregator/aggregator.c
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@ -72,6 +72,9 @@ is_leaf(const struct trie_node *node)
return !node->child[0] && !node->child[1];
}
/*
* Allocate new node in protocol slab
*/
static struct trie_node *
new_node(slab *trie_slab)
{
@ -111,6 +114,9 @@ remove_node(struct trie_node *node)
sl_free(node);
}
/*
* Recursively free all trie nodes
*/
static void
delete_trie(struct trie_node *node)
{
@ -184,6 +190,9 @@ get_ancestor_bucket(const struct trie_node *node)
}
}
/*
* First pass of Optimal Route Table Construction (ORTC) algorithm
*/
static void
first_pass(struct trie_node *node, slab *trie_slab)
{
@ -217,7 +226,7 @@ first_pass(struct trie_node *node, slab *trie_slab)
}
/*
* Compare two bucket pointers
* Compare two bucket pointers.
*/
static int
aggregator_bucket_compare(const void *a, const void *b)
@ -302,6 +311,10 @@ aggregator_bucket_unionize(struct trie_node *node, const struct trie_node *left,
switch (res)
{
case 0:
/*
* If there is no element yet or if the last and new element are not equal
* (that means elements do not repeat), insert new element to the set.
*/
if (node->potential_buckets_count == 0 || node->potential_buckets[node->potential_buckets_count - 1] != left->potential_buckets[i])
node->potential_buckets[node->potential_buckets_count++] = left->potential_buckets[i];
@ -376,11 +389,16 @@ bucket_sets_are_disjoint(const struct trie_node *left, const struct trie_node *r
i++;
else if (res == 1)
j++;
else
bug("Impossible");
}
return 1;
}
/*
* Second pass of Optimal Route Table Construction (ORTC) algorithm
*/
static void
second_pass(struct trie_node *node)
{
@ -437,6 +455,9 @@ remove_potential_buckets(struct trie_node *node)
node->potential_buckets_count = 0;
}
/*
* Third pass of Optimal Route Table Construction (ORTC) algorithm
*/
static void
third_pass(struct trie_node *node)
{
@ -563,6 +584,31 @@ extract_prefixes(const struct trie_node *node, struct aggregated_prefixes *prefi
extract_prefixes_helper(node, prefixes, _MI4(0), 0);
}
static void
print_prefixes_helper(const struct trie_node *node, ip4_addr prefix, int depth)
{
assert(node != NULL);
if (is_leaf(node))
{
log("%I4", prefix);
return;
}
if (node->child[0])
print_prefixes_helper(node->child[0], _MI4(_I(prefix) | (0 << (31 - depth))), depth + 1);
if (node->child[1])
print_prefixes_helper(node->child[1], _MI4(_I(prefix) | (1 << (31 - depth))), depth + 1);
}
static void
print_prefixes(const struct trie_node *node)
{
print_prefixes_helper(node, _MI4(0), 0);
log("==== END PREFIXES ====");
}
/*
* Set static attribute in @rta from static attribute in @old according to @sa.
*/
@ -1109,13 +1155,15 @@ aggregator_rt_notify(struct proto *P, struct channel *src_ch, net *net, rte *new
log("protocol: %p, root: %p, slab: %p", p, p->root, p->trie_slab);
log("Number of prefixes before aggregation: %d", get_trie_prefix_count(p->root));
log("Trie depth before aggregation: %d", get_trie_depth(p->root));
log("==== PREFIXES BEFORE ====");
print_prefixes(p->root);
first_pass(p->root, p->trie_slab);
log("Trie depth after first pass: %d", get_trie_depth(p->root));
//log("Trie depth after first pass: %d", get_trie_depth(p->root));
second_pass(p->root);
log("Trie depth after second pass: %d", get_trie_depth(p->root));
//log("Trie depth after second pass: %d", get_trie_depth(p->root));
third_pass(p->root);
log("Trie depth after third pass: %d", get_trie_depth(p->root));
//log("Trie depth after third pass: %d", get_trie_depth(p->root));
if (is_leaf(p->root))
log("WARNING: root is leaf!");
@ -1128,11 +1176,15 @@ aggregator_rt_notify(struct proto *P, struct channel *src_ch, net *net, rte *new
log("Number of prefixes after aggregation: %d", prefix_count);
extract_prefixes(p->root, prefixes);
log("==== PREFIXES AFTER ====");
print_prefixes(p->root);
log("Aggregated prefixes count: %d", prefixes->count);
log("Trie depth: %d", get_trie_depth(p->root));
assert(prefixes->count == prefix_count);
/*
struct buffer buf;
LOG_BUFFER_INIT(buf);
@ -1143,7 +1195,8 @@ aggregator_rt_notify(struct proto *P, struct channel *src_ch, net *net, rte *new
}
log("%s", buf.start);
*/
/* Announce changes */
if (old_bucket)
aggregator_bucket_update(p, old_bucket, net);