dccp_init_xmit_timers(sk);
- INIT_LIST_HEAD(&dp->dccps_featneg);
/*
* FIXME: We're hardcoding the CCID, and doing this at this point makes
* the listening (master) sock get CCID control blocks, which is not
* setsockopt(CCIDs-I-want/accept). -acme
*/
if (likely(ctl_sock_initialized)) {
- int rc = dccp_feat_init(sk);
+ int rc = dccp_feat_init(dmsk);
if (rc)
return rc;
dp->dccps_hc_rx_ccid = dp->dccps_hc_tx_ccid = NULL;
/* clean up feature negotiation state */
- dccp_feat_list_purge(&dp->dccps_featneg);
+ dccp_feat_clean(dmsk);
}
EXPORT_SYMBOL_GPL(dccp_destroy_sock);
struct dccp_sock *dp = dccp_sk(sk);
dp->dccps_role = DCCP_ROLE_LISTEN;
- /* do not start to listen if feature negotiation setup fails */
- if (dccp_feat_finalise_settings(dp))
- return -EPROTO;
return inet_csk_listen_start(sk, backlog);
}
return 0;
}
-static int dccp_setsockopt_cscov(struct sock *sk, int cscov, bool rx)
+/* byte 1 is feature. the rest is the preference list */
+static int dccp_setsockopt_change(struct sock *sk, int type,
+ struct dccp_so_feat __user *optval)
{
- u8 *list, len;
- int i, rc;
+ struct dccp_so_feat opt;
+ u8 *val;
+ int rc;
- if (cscov < 0 || cscov > 15)
- return -EINVAL;
+ if (copy_from_user(&opt, optval, sizeof(opt)))
+ return -EFAULT;
/*
- * Populate a list of permissible values, in the range cscov...15. This
- * is necessary since feature negotiation of single values only works if
- * both sides incidentally choose the same value. Since the list starts
- * lowest-value first, negotiation will pick the smallest shared value.
+ * rfc4340: 6.1. Change Options
*/
- if (cscov == 0)
- return 0;
- len = 16 - cscov;
-
- list = kmalloc(len, GFP_KERNEL);
- if (list == NULL)
- return -ENOBUFS;
-
- for (i = 0; i < len; i++)
- list[i] = cscov++;
-
- rc = dccp_feat_register_sp(sk, DCCPF_MIN_CSUM_COVER, rx, list, len);
-
- if (rc == 0) {
- if (rx)
- dccp_sk(sk)->dccps_pcrlen = cscov;
- else
- dccp_sk(sk)->dccps_pcslen = cscov;
- }
- kfree(list);
- return rc;
-}
-
-static int dccp_setsockopt_ccid(struct sock *sk, int type,
- char __user *optval, int optlen)
-{
- u8 *val;
- int rc = 0;
-
- if (optlen < 1 || optlen > DCCP_FEAT_MAX_SP_VALS)
+ if (opt.dccpsf_len < 1)
return -EINVAL;
- val = kmalloc(optlen, GFP_KERNEL);
- if (val == NULL)
+ val = kmalloc(opt.dccpsf_len, GFP_KERNEL);
+ if (!val)
return -ENOMEM;
- if (copy_from_user(val, optval, optlen)) {
- kfree(val);
- return -EFAULT;
+ if (copy_from_user(val, opt.dccpsf_val, opt.dccpsf_len)) {
+ rc = -EFAULT;
+ goto out_free_val;
}
- lock_sock(sk);
- if (type == DCCP_SOCKOPT_TX_CCID || type == DCCP_SOCKOPT_CCID)
- rc = dccp_feat_register_sp(sk, DCCPF_CCID, 1, val, optlen);
+ rc = dccp_feat_change(dccp_msk(sk), type, opt.dccpsf_feat,
+ val, opt.dccpsf_len, GFP_KERNEL);
+ if (rc)
+ goto out_free_val;
- if (!rc && (type == DCCP_SOCKOPT_RX_CCID || type == DCCP_SOCKOPT_CCID))
- rc = dccp_feat_register_sp(sk, DCCPF_CCID, 0, val, optlen);
- release_sock(sk);
+out:
+ return rc;
+out_free_val:
kfree(val);
- return rc;
+ goto out;
}
static int do_dccp_setsockopt(struct sock *sk, int level, int optname,
struct dccp_sock *dp = dccp_sk(sk);
int val, err = 0;
- switch (optname) {
- case DCCP_SOCKOPT_PACKET_SIZE:
- DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n");
- return 0;
- case DCCP_SOCKOPT_CHANGE_L:
- case DCCP_SOCKOPT_CHANGE_R:
- DCCP_WARN("sockopt(CHANGE_L/R) is deprecated: fix your app\n");
- return 0;
- case DCCP_SOCKOPT_CCID:
- case DCCP_SOCKOPT_RX_CCID:
- case DCCP_SOCKOPT_TX_CCID:
- return dccp_setsockopt_ccid(sk, optname, optval, optlen);
- }
-
- if (optlen < (int)sizeof(int))
+ if (optlen < sizeof(int))
return -EINVAL;
if (get_user(val, (int __user *)optval))
lock_sock(sk);
switch (optname) {
+ case DCCP_SOCKOPT_PACKET_SIZE:
+ DCCP_WARN("sockopt(PACKET_SIZE) is deprecated: fix your app\n");
+ err = 0;
+ break;
+ case DCCP_SOCKOPT_CHANGE_L:
+ if (optlen != sizeof(struct dccp_so_feat))
+ err = -EINVAL;
+ else
+ err = dccp_setsockopt_change(sk, DCCPO_CHANGE_L,
+ (struct dccp_so_feat __user *)
+ optval);
+ break;
+ case DCCP_SOCKOPT_CHANGE_R:
+ if (optlen != sizeof(struct dccp_so_feat))
+ err = -EINVAL;
+ else
+ err = dccp_setsockopt_change(sk, DCCPO_CHANGE_R,
+ (struct dccp_so_feat __user *)
+ optval);
+ break;
case DCCP_SOCKOPT_SERVER_TIMEWAIT:
if (dp->dccps_role != DCCP_ROLE_SERVER)
err = -EOPNOTSUPP;
else
dp->dccps_server_timewait = (val != 0);
break;
- case DCCP_SOCKOPT_SEND_CSCOV:
- err = dccp_setsockopt_cscov(sk, val, false);
+ case DCCP_SOCKOPT_SEND_CSCOV: /* sender side, RFC 4340, sec. 9.2 */
+ if (val < 0 || val > 15)
+ err = -EINVAL;
+ else
+ dp->dccps_pcslen = val;
break;
- case DCCP_SOCKOPT_RECV_CSCOV:
- err = dccp_setsockopt_cscov(sk, val, true);
+ case DCCP_SOCKOPT_RECV_CSCOV: /* receiver side, RFC 4340 sec. 9.2.1 */
+ if (val < 0 || val > 15)
+ err = -EINVAL;
+ else {
+ dp->dccps_pcrlen = val;
+ /* FIXME: add feature negotiation,
+ * ChangeL(MinimumChecksumCoverage, val) */
+ }
break;
default:
err = -ENOPROTOOPT;
break;
}
- release_sock(sk);
+ release_sock(sk);
return err;
}
case DCCP_SOCKOPT_GET_CUR_MPS:
val = dp->dccps_mss_cache;
break;
- case DCCP_SOCKOPT_AVAILABLE_CCIDS:
- return ccid_getsockopt_builtin_ccids(sk, len, optval, optlen);
case DCCP_SOCKOPT_SERVER_TIMEWAIT:
val = dp->dccps_server_timewait;
break;
git.openpandora.org / pandora-kernel.git / blobdiff