[sr-dev] ENUM module number length limit

[Alex Balashov]

Hello,

Per the ENUM module documentation[1]:

    These functions assume that the Request URI user part consists
    of an international phone number of the form +decimal-digits,
    where the number of digits is at least 2 and at most 15.

Two questions arise:

1. Why was this limit of 15 introduced? Is there some basis for it in 
the ENUM spec or in the way DNS works?

2. I need to feed considerably longer values to the ENUM server, and 
would like to use enum_pv_query() to do so. I don't see a check for 
len(s) > 15 in enum_pv_query_3().

Is it safe to increase the value of these constants to 50-100+?

#define MAX_DOMAIN_SIZE 256
#define MAX_NUM_LEN 22
#define MAX_COMPONENT_SIZE (MAX_NUM_LEN * 2)  /* separator, apex, ... 
This simplifies checks */

Or will it have some unpredictable effects?

Thanks,

-- Alex

[1] http://kamailio.org/docs/modules/4.2.x/modules/enum.html#sec-overview

-- 
Alex Balashov - Principal
Evariste Systems LLC
235 E Ponce de Leon Ave
Suite 106
Decatur, GA 30030
United States

Tel: +1-678-954-0670
Web: http://www.evaristesys.com/, http://www.alexbalashov.com/