Function parse_naptr_regexp

modules/enum/enum.c:128–166

Parse NAPTR regexp field of the form !pattern!replacement! and return its * components in pattern and replacement parameters. Regexp field starts at * address first and is len characters long. */

 * address first and is len characters long.
 */
static inline int parse_naptr_regexp(char* first, int len, str* pattern,
										str* replacement)
{
	char *second, *third;

	if (len > 0) {
		if (*first == '!') {
			second = (char *)memchr((void *)(first + 1), '!', len - 1);
			if (second) {
				len = len - (second - first + 1);
				if (len > 0) {
					third = memchr(second + 1, '!', len);
					if (third) {
						pattern->len = second - first - 1;
						pattern->s = first + 1;
						replacement->len = third - second - 1;
						replacement->s = second + 1;
						return 1;
					} else {
						LM_ERR("Third ! missing from regexp\n");
						return -1;
					}
				} else {
					LM_ERR("Third ! missing from regexp\n");
					return -2;
				}
			} else {
				LM_ERR("Second ! missing from regexp\n");
				return -3;
			}
		} else {
			LM_ERR("First ! missing from regexp\n");
			return -4;
		}
	} else {
		LM_ERR("Regexp missing\n");
		return -5;
	}
}
/* Checks if NAPTR record has flag u and its services field
 * e2u+[service:]sip or
 * e2u+service[+service[+service[+...]]]