Is ikev2_decryption_table file limited (how many lines/connections could it contain)?

edit

You may reach an unusable size (performance) before running out of room for the entries.

epan/dissectors/packet-isakmp.c:

static unsigned num_ikev2_uat_data;

epan/uat.h:

 * UATs are meant for short tables of user data (passwords and such), there is
 * no quick access, you must iterate through them each time to fetch the record
 * you are looking for.

isakmp hashes some fields from the UAT so that helps performance but more memory.
epan/dissectors/packet-isakmp:

  ikev2_key_hash = g_hash_table_new(ikev2_key_hash_func, ikev2_key_equal_func);
  for (i = 0; i < num_ikev2_uat_data; i++) {
    g_hash_table_insert(ikev2_key_hash, &(ikev2_uat_data[i].key), &(ikev2_uat_data[i]));
    /* Need find references to algorithms (as UAT table editing looses data not stored in file) */
    ikev2_uat_data[i].encr_spec = ikev2_decrypt_find_encr_spec(ikev2_uat_data[i].encr_alg);
    ikev2_uat_data[i].auth_spec = ikev2_decrypt_find_auth_spec(ikev2_uat_data[i].auth_alg);
  }

The answer is the size of unsigned type in C? So, maximum value accounts for 65535 or 4294967295 (depending on a system)?

32 bit system, 2^32-1 = 4,294,967,295
64 bit system 2^64-1 = 18,446,744,073,709,551,615