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Also special case "accept 1-65535" case, do not leak in non-exit case

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svn:r16526
This commit is contained in:
Peter Palfrader 2008-08-13 12:46:00 +00:00
parent 8ef2fe4b37
commit c4e8fe11db
1 changed files with 13 additions and 4 deletions
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17
src/or/policies.c
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@ -1086,7 +1086,9 @@ policy_summary_add_item(smartlist_t *summary, addr_policy_t *p)
* The summary will either be an "accept" plus a comma-seperated list of port
* ranges or a "reject" plus portranges, depending on which is shorter.
*
* If no exits are allowed at all then NULL is returned.
* If no exits are allowed at all then NULL is returned, if no ports
* are blocked instead of "reject " we return "accept 1-65535" (this
* is an exception to the shorter-representation-wins rule).
*/
char *
policy_summarize(smartlist_t *policy)
@ -1095,7 +1097,7 @@ policy_summarize(smartlist_t *policy)
smartlist_t *accepts, *rejects;
int i, last, start_prt;
size_t accepts_len, rejects_len, shorter_len, final_size;
char *accepts_str, *rejects_str, *shorter_str, *result;
char *accepts_str = NULL, *rejects_str = NULL, *shorter_str, *result;
const char *prefix;
tor_assert(policy);
@ -1141,8 +1143,14 @@ policy_summarize(smartlist_t *policy)
/* Figure out which of the two stringlists will be shorter and use
* that to build the result
*/
if (smartlist_len(accepts) == 0) /* no exits at all */
return NULL;
if (smartlist_len(accepts) == 0) { /* no exits at all */
result = NULL;
goto cleanup;
}
if (smartlist_len(rejects) == 0) { /* no rejects at all */
result = tor_strdup("accept 1-65535");
goto cleanup;
}
accepts_str = smartlist_join_strings(accepts, ",", 0, &accepts_len);
rejects_str = smartlist_join_strings(rejects, ",", 0, &rejects_len);
@ -1161,6 +1169,7 @@ policy_summarize(smartlist_t *policy)
result = malloc(final_size);
tor_snprintf(result, final_size, "%s %s", prefix, shorter_str);
cleanup:
/* cleanup */
SMARTLIST_FOREACH(summary, policy_summary_item_t *, s, tor_free(s));
smartlist_clear(summary);