alg_ipsec_encdef_keylen
extern int alg_ipsec_encdef_keylen(int, int);
encklen_tmp = alg_ipsec_encdef_keylen($$->alg, $$->encklen);
sl = alg_ipsec_encdef_keylen(tr->trns_id,
res = alg_ipsec_encdef_keylen(enctype, encklen);