Fix parsing of empty labels.

vstakhov · Sep 10, 2014 · 459a2d8 · 459a2d8
1 parent 429e210
commit 459a2d8
Showing 1 changed file with 7 additions and 1 deletion.
diff --git a/src/parse.c b/src/parse.c
@@ -223,7 +223,13 @@ rdns_parse_labels (struct rdns_resolver *resolver,
  p += *p + 1;
  }
  }
- *(t - 1) = '\0';
+ if (t > (uint8_t *)*target) {
+ *(t - 1) = '\0';
+ }
+ else {
+ /* Handle empty labels */
+ **target = '\0';
+ }
 end:
  *remain = new_remain;
  *pos = new_pos;