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@@ -3592,7 +3592,40 @@ out:
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/* The SCTP ioctl handler. */
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SCTP_STATIC int sctp_ioctl(struct sock *sk, int cmd, unsigned long arg)
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{
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- return -ENOIOCTLCMD;
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+ int rc = -ENOTCONN;
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+
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+ sctp_lock_sock(sk);
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+
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+ /*
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+ * SEQPACKET-style sockets in LISTENING state are valid, for
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+ * SCTP, so only discard TCP-style sockets in LISTENING state.
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+ */
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+ if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))
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+ goto out;
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+
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+ switch (cmd) {
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+ case SIOCINQ: {
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+ struct sk_buff *skb;
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+ unsigned int amount = 0;
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+
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+ skb = skb_peek(&sk->sk_receive_queue);
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+ if (skb != NULL) {
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+ /*
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+ * We will only return the amount of this packet since
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+ * that is all that will be read.
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+ */
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+ amount = skb->len;
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+ }
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+ rc = put_user(amount, (int __user *)arg);
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+ }
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+ break;
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+ default:
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+ rc = -ENOIOCTLCMD;
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+ break;
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+ }
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+out:
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+ sctp_release_sock(sk);
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+ return rc;
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}
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/* This is the function which gets called during socket creation to
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