allow decode of zero-length strings

diff --git a/src/protocols/dhcpv6/decode.c b/src/protocols/dhcpv6/decode.c
index fa9a33cac3ed2f3faa5220a4c6abdb6b72fea1ab..d0ad044c48ab49d57e18c88de64d14d3a922f30d 100644 (file)
--- a/src/protocols/dhcpv6/decode.c
+++ b/src/protocols/dhcpv6/decode.c
@@ -239,7 +239,7 @@ static ssize_t decode_array(TALLOC_CTX *ctx, fr_cursor_t *cursor, fr_dict_t cons
         *   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-...-+-+-+-+-+-+-+
         */
        while (p < end) {
-               if ((end - p) <= 2) {
+               if ((end - p) < 2) {
                raw:
                        slen = decode_raw(ctx, cursor, dict, parent, p, end - p , decoder_ctx);
                        if (slen < 0) return slen;
@@ -252,7 +252,7 @@ static ssize_t decode_array(TALLOC_CTX *ctx, fr_cursor_t *cursor, fr_dict_t cons
                }
 
                p += 2;
-               slen = decode_value(ctx, cursor, dict, parent, p, element_len , decoder_ctx);
+               slen = decode_value(ctx, cursor, dict, parent, p, element_len, decoder_ctx);
                if (slen < 0) return slen;
                p += slen;
        }