SADB_EXT_KEY_ENCRYPT
!ext_hdrs[SADB_EXT_KEY_ENCRYPT-1])
key = ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
key = (struct sadb_key*) ext_hdrs[SADB_EXT_KEY_ENCRYPT-1];
[SADB_EXT_KEY_ENCRYPT] = (u8) sizeof(struct sadb_key),
case SADB_EXT_KEY_ENCRYPT:
key->sadb_key_exttype = SADB_EXT_KEY_ENCRYPT;