* sockaddr_in6 [RFC 2553]),
* addr_len - the size of the address structure.
*/
-SCTP_STATIC int sctp_bind(struct sock *sk, struct sockaddr *uaddr, int addr_len)
+SCTP_STATIC int sctp_bind(struct sock *sk, struct sockaddr *addr, int addr_len)
{
int retval = 0;
sctp_lock_sock(sk);
- SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, uaddr: %p, addr_len: %d)\n",
- sk, uaddr, addr_len);
+ SCTP_DEBUG_PRINTK("sctp_bind(sk: %p, addr: %p, addr_len: %d)\n",
+ sk, addr, addr_len);
/* Disallow binding twice. */
if (!sctp_sk(sk)->ep->base.bind_addr.port)
- retval = sctp_do_bind(sk, (union sctp_addr *)uaddr,
+ retval = sctp_do_bind(sk, (union sctp_addr *)addr,
addr_len);
else
retval = -EINVAL;
unsigned short snum;
int ret = 0;
- SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d)\n",
- sk, addr, len);
-
/* Common sockaddr verification. */
af = sctp_sockaddr_af(sp, addr, len);
- if (!af)
+ if (!af) {
+ SCTP_DEBUG_PRINTK("sctp_do_bind(sk: %p, newaddr: %p, len: %d) EINVAL\n",
+ sk, addr, len);
return -EINVAL;
+ }
+
+ snum = ntohs(addr->v4.sin_port);
+
+ SCTP_DEBUG_PRINTK_IPADDR("sctp_do_bind(sk: %p, new addr: ",
+ ", port: %d, new port: %d, len: %d)\n",
+ sk,
+ addr,
+ bp->port, snum,
+ len);
/* PF specific bind() address verification. */
if (!sp->pf->bind_verify(sp, addr))
return -EADDRNOTAVAIL;
- snum= ntohs(addr->v4.sin_port);
-
- SCTP_DEBUG_PRINTK("sctp_do_bind: port: %d, new port: %d\n",
- bp->port, snum);
-
/* We must either be unbound, or bind to the same port. */
if (bp->port && (snum != bp->port)) {
SCTP_DEBUG_PRINTK("sctp_do_bind:"
*
* Basically do nothing but copying the addresses from user to kernel
* land and invoking either sctp_bindx_add() or sctp_bindx_rem() on the sk.
- * This is used for tunneling the sctp_bindx() request through sctp_setsockopt() * from userspace.
+ * This is used for tunneling the sctp_bindx() request through sctp_setsockopt()
+ * from userspace.
*
* We don't use copy_from_user() for optimization: we first do the
* sanity checks (buffer size -fast- and access check-healthy
return err;
}
+/* __sctp_connect(struct sock* sk, struct sockaddr *kaddrs, int addrs_size)
+ *
+ * Common routine for handling connect() and sctp_connectx().
+ * Connect will come in with just a single address.
+ */
+static int __sctp_connect(struct sock* sk,
+ struct sockaddr *kaddrs,
+ int addrs_size)
+{
+ struct sctp_sock *sp;
+ struct sctp_endpoint *ep;
+ struct sctp_association *asoc = NULL;
+ struct sctp_association *asoc2;
+ struct sctp_transport *transport;
+ union sctp_addr to;
+ struct sctp_af *af;
+ sctp_scope_t scope;
+ long timeo;
+ int err = 0;
+ int addrcnt = 0;
+ int walk_size = 0;
+ struct sockaddr *sa_addr;
+ void *addr_buf;
+
+ sp = sctp_sk(sk);
+ ep = sp->ep;
+
+ /* connect() cannot be done on a socket that is already in ESTABLISHED
+ * state - UDP-style peeled off socket or a TCP-style socket that
+ * is already connected.
+ * It cannot be done even on a TCP-style listening socket.
+ */
+ if (sctp_sstate(sk, ESTABLISHED) ||
+ (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) {
+ err = -EISCONN;
+ goto out_free;
+ }
+
+ /* Walk through the addrs buffer and count the number of addresses. */
+ addr_buf = kaddrs;
+ while (walk_size < addrs_size) {
+ sa_addr = (struct sockaddr *)addr_buf;
+ af = sctp_get_af_specific(sa_addr->sa_family);
+
+ /* If the address family is not supported or if this address
+ * causes the address buffer to overflow return EINVAL.
+ */
+ if (!af || (walk_size + af->sockaddr_len) > addrs_size) {
+ err = -EINVAL;
+ goto out_free;
+ }
+
+ err = sctp_verify_addr(sk, (union sctp_addr *)sa_addr,
+ af->sockaddr_len);
+ if (err)
+ goto out_free;
+
+ memcpy(&to, sa_addr, af->sockaddr_len);
+ to.v4.sin_port = ntohs(to.v4.sin_port);
+
+ /* Check if there already is a matching association on the
+ * endpoint (other than the one created here).
+ */
+ asoc2 = sctp_endpoint_lookup_assoc(ep, &to, &transport);
+ if (asoc2 && asoc2 != asoc) {
+ if (asoc2->state >= SCTP_STATE_ESTABLISHED)
+ err = -EISCONN;
+ else
+ err = -EALREADY;
+ goto out_free;
+ }
+
+ /* If we could not find a matching association on the endpoint,
+ * make sure that there is no peeled-off association matching
+ * the peer address even on another socket.
+ */
+ if (sctp_endpoint_is_peeled_off(ep, &to)) {
+ err = -EADDRNOTAVAIL;
+ goto out_free;
+ }
+
+ if (!asoc) {
+ /* If a bind() or sctp_bindx() is not called prior to
+ * an sctp_connectx() call, the system picks an
+ * ephemeral port and will choose an address set
+ * equivalent to binding with a wildcard address.
+ */
+ if (!ep->base.bind_addr.port) {
+ if (sctp_autobind(sk)) {
+ err = -EAGAIN;
+ goto out_free;
+ }
+ }
+
+ scope = sctp_scope(&to);
+ asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
+ if (!asoc) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+ }
+
+ /* Prime the peer's transport structures. */
+ transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL,
+ SCTP_UNKNOWN);
+ if (!transport) {
+ err = -ENOMEM;
+ goto out_free;
+ }
+
+ addrcnt++;
+ addr_buf += af->sockaddr_len;
+ walk_size += af->sockaddr_len;
+ }
+
+ err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL);
+ if (err < 0) {
+ goto out_free;
+ }
+
+ err = sctp_primitive_ASSOCIATE(asoc, NULL);
+ if (err < 0) {
+ goto out_free;
+ }
+
+ /* Initialize sk's dport and daddr for getpeername() */
+ inet_sk(sk)->dport = htons(asoc->peer.port);
+ af = sctp_get_af_specific(to.sa.sa_family);
+ af->to_sk_daddr(&to, sk);
+
+ timeo = sock_sndtimeo(sk, sk->sk_socket->file->f_flags & O_NONBLOCK);
+ err = sctp_wait_for_connect(asoc, &timeo);
+
+ /* Don't free association on exit. */
+ asoc = NULL;
+
+out_free:
+
+ SCTP_DEBUG_PRINTK("About to exit __sctp_connect() free asoc: %p"
+ " kaddrs: %p err: %d\n",
+ asoc, kaddrs, err);
+ if (asoc)
+ sctp_association_free(asoc);
+ return err;
+}
+
+/* Helper for tunneling sctp_connectx() requests through sctp_setsockopt()
+ *
+ * API 8.9
+ * int sctp_connectx(int sd, struct sockaddr *addrs, int addrcnt);
+ *
+ * If sd is an IPv4 socket, the addresses passed must be IPv4 addresses.
+ * If the sd is an IPv6 socket, the addresses passed can either be IPv4
+ * or IPv6 addresses.
+ *
+ * A single address may be specified as INADDR_ANY or IN6ADDR_ANY, see
+ * Section 3.1.2 for this usage.
+ *
+ * addrs is a pointer to an array of one or more socket addresses. Each
+ * address is contained in its appropriate structure (i.e. struct
+ * sockaddr_in or struct sockaddr_in6) the family of the address type
+ * must be used to distengish the address length (note that this
+ * representation is termed a "packed array" of addresses). The caller
+ * specifies the number of addresses in the array with addrcnt.
+ *
+ * On success, sctp_connectx() returns 0. On failure, sctp_connectx() returns
+ * -1, and sets errno to the appropriate error code.
+ *
+ * For SCTP, the port given in each socket address must be the same, or
+ * sctp_connectx() will fail, setting errno to EINVAL.
+ *
+ * An application can use sctp_connectx to initiate an association with
+ * an endpoint that is multi-homed. Much like sctp_bindx() this call
+ * allows a caller to specify multiple addresses at which a peer can be
+ * reached. The way the SCTP stack uses the list of addresses to set up
+ * the association is implementation dependant. This function only
+ * specifies that the stack will try to make use of all the addresses in
+ * the list when needed.
+ *
+ * Note that the list of addresses passed in is only used for setting up
+ * the association. It does not necessarily equal the set of addresses
+ * the peer uses for the resulting association. If the caller wants to
+ * find out the set of peer addresses, it must use sctp_getpaddrs() to
+ * retrieve them after the association has been set up.
+ *
+ * Basically do nothing but copying the addresses from user to kernel
+ * land and invoking either sctp_connectx(). This is used for tunneling
+ * the sctp_connectx() request through sctp_setsockopt() from userspace.
+ *
+ * We don't use copy_from_user() for optimization: we first do the
+ * sanity checks (buffer size -fast- and access check-healthy
+ * pointer); if all of those succeed, then we can alloc the memory
+ * (expensive operation) needed to copy the data to kernel. Then we do
+ * the copying without checking the user space area
+ * (__copy_from_user()).
+ *
+ * On exit there is no need to do sockfd_put(), sys_setsockopt() does
+ * it.
+ *
+ * sk The sk of the socket
+ * addrs The pointer to the addresses in user land
+ * addrssize Size of the addrs buffer
+ *
+ * Returns 0 if ok, <0 errno code on error.
+ */
+SCTP_STATIC int sctp_setsockopt_connectx(struct sock* sk,
+ struct sockaddr __user *addrs,
+ int addrs_size)
+{
+ int err = 0;
+ struct sockaddr *kaddrs;
+
+ SCTP_DEBUG_PRINTK("%s - sk %p addrs %p addrs_size %d\n",
+ __FUNCTION__, sk, addrs, addrs_size);
+
+ if (unlikely(addrs_size <= 0))
+ return -EINVAL;
+
+ /* Check the user passed a healthy pointer. */
+ if (unlikely(!access_ok(VERIFY_READ, addrs, addrs_size)))
+ return -EFAULT;
+
+ /* Alloc space for the address array in kernel memory. */
+ kaddrs = (struct sockaddr *)kmalloc(addrs_size, GFP_KERNEL);
+ if (unlikely(!kaddrs))
+ return -ENOMEM;
+
+ if (__copy_from_user(kaddrs, addrs, addrs_size)) {
+ err = -EFAULT;
+ } else {
+ err = __sctp_connect(sk, kaddrs, addrs_size);
+ }
+
+ kfree(kaddrs);
+ return err;
+}
+
/* API 3.1.4 close() - UDP Style Syntax
* Applications use close() to perform graceful shutdown (as described in
* Section 10.1 of [SCTP]) on ALL the associations currently represented
sp = sctp_sk(sk);
ep = sp->ep;
- SCTP_DEBUG_PRINTK("Using endpoint: %s.\n", ep->debug_name);
+ SCTP_DEBUG_PRINTK("Using endpoint: %p.\n", ep);
/* We cannot send a message over a TCP-style listening socket. */
if (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING)) {
}
/* Prime the peer's transport structures. */
- transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL);
+ transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL, SCTP_UNKNOWN);
if (!transport) {
err = -ENOMEM;
goto out_free;
optlen, SCTP_BINDX_REM_ADDR);
break;
+ case SCTP_SOCKOPT_CONNECTX:
+ /* 'optlen' is the size of the addresses buffer. */
+ retval = sctp_setsockopt_connectx(sk, (struct sockaddr __user *)optval,
+ optlen);
+ break;
+
case SCTP_DISABLE_FRAGMENTS:
retval = sctp_setsockopt_disable_fragments(sk, optval, optlen);
break;
*
* len: the size of the address.
*/
-SCTP_STATIC int sctp_connect(struct sock *sk, struct sockaddr *uaddr,
+SCTP_STATIC int sctp_connect(struct sock *sk, struct sockaddr *addr,
int addr_len)
{
- struct sctp_sock *sp;
- struct sctp_endpoint *ep;
- struct sctp_association *asoc;
- struct sctp_transport *transport;
- union sctp_addr to;
- struct sctp_af *af;
- sctp_scope_t scope;
- long timeo;
int err = 0;
+ struct sctp_af *af;
sctp_lock_sock(sk);
- SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d)\n",
- __FUNCTION__, sk, uaddr, addr_len);
-
- sp = sctp_sk(sk);
- ep = sp->ep;
-
- /* connect() cannot be done on a socket that is already in ESTABLISHED
- * state - UDP-style peeled off socket or a TCP-style socket that
- * is already connected.
- * It cannot be done even on a TCP-style listening socket.
- */
- if (sctp_sstate(sk, ESTABLISHED) ||
- (sctp_style(sk, TCP) && sctp_sstate(sk, LISTENING))) {
- err = -EISCONN;
- goto out_unlock;
- }
-
- err = sctp_verify_addr(sk, (union sctp_addr *)uaddr, addr_len);
- if (err)
- goto out_unlock;
+ SCTP_DEBUG_PRINTK("%s - sk: %p, sockaddr: %p, addr_len: %d\n",
+ __FUNCTION__, sk, addr, addr_len);
- if (addr_len > sizeof(to))
- addr_len = sizeof(to);
- memcpy(&to, uaddr, addr_len);
- to.v4.sin_port = ntohs(to.v4.sin_port);
-
- asoc = sctp_endpoint_lookup_assoc(ep, &to, &transport);
- if (asoc) {
- if (asoc->state >= SCTP_STATE_ESTABLISHED)
- err = -EISCONN;
- else
- err = -EALREADY;
- goto out_unlock;
- }
-
- /* If we could not find a matching association on the endpoint,
- * make sure that there is no peeled-off association matching the
- * peer address even on another socket.
- */
- if (sctp_endpoint_is_peeled_off(ep, &to)) {
- err = -EADDRNOTAVAIL;
- goto out_unlock;
- }
-
- /* If a bind() or sctp_bindx() is not called prior to a connect()
- * call, the system picks an ephemeral port and will choose an address
- * set equivalent to binding with a wildcard address.
- */
- if (!ep->base.bind_addr.port) {
- if (sctp_autobind(sk)) {
- err = -EAGAIN;
- goto out_unlock;
- }
- }
-
- scope = sctp_scope(&to);
- asoc = sctp_association_new(ep, sk, scope, GFP_KERNEL);
- if (!asoc) {
- err = -ENOMEM;
- goto out_unlock;
- }
-
- /* Prime the peer's transport structures. */
- transport = sctp_assoc_add_peer(asoc, &to, GFP_KERNEL);
- if (!transport) {
- sctp_association_free(asoc);
- goto out_unlock;
- }
- err = sctp_assoc_set_bind_addr_from_ep(asoc, GFP_KERNEL);
- if (err < 0) {
- sctp_association_free(asoc);
- goto out_unlock;
- }
-
- err = sctp_primitive_ASSOCIATE(asoc, NULL);
- if (err < 0) {
- sctp_association_free(asoc);
- goto out_unlock;
+ /* Validate addr_len before calling common connect/connectx routine. */
+ af = sctp_get_af_specific(addr->sa_family);
+ if (!af || addr_len < af->sockaddr_len) {
+ err = -EINVAL;
+ } else {
+ /* Pass correct addr len to common routine (so it knows there
+ * is only one address being passed.
+ */
+ err = __sctp_connect(sk, addr, af->sockaddr_len);
}
- /* Initialize sk's dport and daddr for getpeername() */
- inet_sk(sk)->dport = htons(asoc->peer.port);
- af = sctp_get_af_specific(to.sa.sa_family);
- af->to_sk_daddr(&to, sk);
-
- timeo = sock_sndtimeo(sk, sk->sk_socket->file->f_flags & O_NONBLOCK);
- err = sctp_wait_for_connect(asoc, &timeo);
-
-out_unlock:
sctp_release_sock(sk);
-
return err;
}
/* Map ipv4 address into v4-mapped-on-v6 address. */
sctp_get_pf_specific(sk->sk_family)->addr_v4map(sctp_sk(sk),
(union sctp_addr *)&status.sstat_primary.spinfo_address);
- status.sstat_primary.spinfo_state = transport->active;
+ status.sstat_primary.spinfo_state = transport->state;
status.sstat_primary.spinfo_cwnd = transport->cwnd;
status.sstat_primary.spinfo_srtt = transport->srtt;
status.sstat_primary.spinfo_rto = jiffies_to_msecs(transport->rto);
status.sstat_primary.spinfo_mtu = transport->pmtu;
+ if (status.sstat_primary.spinfo_state == SCTP_UNKNOWN)
+ status.sstat_primary.spinfo_state = SCTP_ACTIVE;
+
if (put_user(len, optlen)) {
retval = -EFAULT;
goto out;
return -EINVAL;
pinfo.spinfo_assoc_id = sctp_assoc2id(transport->asoc);
- pinfo.spinfo_state = transport->active;
+ pinfo.spinfo_state = transport->state;
pinfo.spinfo_cwnd = transport->cwnd;
pinfo.spinfo_srtt = transport->srtt;
pinfo.spinfo_rto = jiffies_to_msecs(transport->rto);
pinfo.spinfo_mtu = transport->pmtu;
+ if (pinfo.spinfo_state == SCTP_UNKNOWN)
+ pinfo.spinfo_state = SCTP_ACTIVE;
+
if (put_user(len, optlen)) {
retval = -EFAULT;
goto out;
int retval = 0;
int len;
- SCTP_DEBUG_PRINTK("sctp_getsockopt(sk: %p, ...)\n", sk);
+ SCTP_DEBUG_PRINTK("sctp_getsockopt(sk: %p... optname: %d)\n",
+ sk, optname);
/* I can hardly begin to describe how wrong this is. This is
* so broken as to be worse than useless. The API draft
* However, this function was corrent in any case. 8)
*/
if (flags & MSG_PEEK) {
- unsigned long cpu_flags;
-
- sctp_spin_lock_irqsave(&sk->sk_receive_queue.lock,
- cpu_flags);
+ spin_lock_bh(&sk->sk_receive_queue.lock);
skb = skb_peek(&sk->sk_receive_queue);
if (skb)
atomic_inc(&skb->users);
- sctp_spin_unlock_irqrestore(&sk->sk_receive_queue.lock,
- cpu_flags);
+ spin_unlock_bh(&sk->sk_receive_queue.lock);
} else {
skb = skb_dequeue(&sk->sk_receive_queue);
}
return err;
do_error:
- if (asoc->counters[SCTP_COUNTER_INIT_ERROR] + 1 >=
- asoc->max_init_attempts)
+ if (asoc->init_err_counter + 1 >= asoc->max_init_attempts)
err = -ETIMEDOUT;
else
err = -ECONNREFUSED;
struct sctp_endpoint *newep = newsp->ep;
struct sk_buff *skb, *tmp;
struct sctp_ulpevent *event;
+ int flags = 0;
/* Migrate socket buffer sizes and all the socket level options to the
* new socket.
sctp_sk(newsk)->bind_hash = pp;
inet_sk(newsk)->num = inet_sk(oldsk)->num;
+ /* Copy the bind_addr list from the original endpoint to the new
+ * endpoint so that we can handle restarts properly
+ */
+ if (assoc->peer.ipv4_address)
+ flags |= SCTP_ADDR4_PEERSUPP;
+ if (assoc->peer.ipv6_address)
+ flags |= SCTP_ADDR6_PEERSUPP;
+ sctp_bind_addr_copy(&newsp->ep->base.bind_addr,
+ &oldsp->ep->base.bind_addr,
+ SCTP_SCOPE_GLOBAL, GFP_KERNEL, flags);
+
/* Move any messages in the old socket's receive queue that are for the
* peeled off association to the new socket's receive queue.
*/
projects / powerpc.git / blobdiff