static int accept_interrupt(struct uip_conn *listener, struct uip_conn *conn)
{
struct accept_s *pstate = (struct accept_s *)listener->accept_private;
int ret = -EINVAL;
if (pstate)
{
/* Get the connection address */
accept_tcpsender(conn, pstate->acpt_addr);
/* Save the connection structure */
pstate->acpt_newconn = conn;
pstate->acpt_result = OK;
/* There should be a reference of one on the new connection */
DEBUGASSERT(conn->crefs == 1);
/* Wake-up the waiting caller thread */
sem_post(&pstate->acpt_sem);
/* Stop any further callbacks */
listener->accept_private = NULL;
listener->accept = NULL;
ret = OK;
}
return ret;
}
int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen)
{
FAR struct socket *psock = sockfd_socket(sockfd);
FAR struct socket *pnewsock;
FAR struct uip_conn *conn;
struct accept_s state;
#ifdef CONFIG_NET_IPv6
FAR struct sockaddr_in6 *inaddr = (struct sockaddr_in6 *)addr;
#else
FAR struct sockaddr_in *inaddr = (struct sockaddr_in *)addr;
#endif
uip_lock_t save;
int newfd;
int err;
int ret;
/* Verify that the sockfd corresponds to valid, allocated socket */
if (!psock || psock->s_crefs <= 0)
{
/* It is not a valid socket description. Distinguish between the cases
* where sockfd is a just valid and when it is a valid file descriptor used
* in the wrong context.
*/
#if CONFIG_NFILE_DESCRIPTORS > 0
if ((unsigned int)sockfd < CONFIG_NFILE_DESCRIPTORS)
{
err = ENOTSOCK;
}
else
#endif
{
err = EBADF;
}
goto errout;
}
/* We have a socket descriptor, but it is a stream? */
if (psock->s_type != SOCK_STREAM)
{
err = EOPNOTSUPP;
goto errout;
}
/* Is the socket listening for a connection? */
if (!_SS_ISLISTENING(psock->s_flags))
{
err = EINVAL;
goto errout;
}
/* Verify that a valid memory block has been provided to receive the
* address
*/
if (addr)
{
#ifdef CONFIG_NET_IPv6
if (*addrlen < sizeof(struct sockaddr_in6))
#else
if (*addrlen < sizeof(struct sockaddr_in))
#endif
{
err = EBADF;
goto errout;
}
}
/* Allocate a socket descriptor for the new connection now (so that it
* cannot fail later)
*/
newfd = sockfd_allocate(0);
if (newfd < 0)
{
err = ENFILE;
goto errout;
}
pnewsock = sockfd_socket(newfd);
if (!pnewsock)
{
err = ENFILE;
goto errout_with_socket;
}
/* Check the backlog to see if there is a connection already pending for
* this listener.
*/
save = uip_lock();
conn = (struct uip_conn *)psock->s_conn;
#ifdef CONFIG_NET_TCPBACKLOG
state.acpt_newconn = uip_backlogremove(conn);
if (state.acpt_newconn)
{
/* Yes... get the address of the connected client */
nvdbg("Pending conn=%p\n", state.acpt_newconn);
accept_tcpsender(state.acpt_newconn, inaddr);
}
/* In general, this uIP-based implementation will not support non-blocking
* socket operations... except in a few cases: Here for TCP accept with backlog
* enabled. If this socket is configured as non-blocking then return EAGAIN
* if there is no pending connection in the backlog.
*/
else if (_SS_ISNONBLOCK(psock->s_flags))
{
err = EAGAIN;
goto errout_with_lock;
}
else
#endif
{
/* Set the socket state to accepting */
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_ACCEPT);
/* Perform the TCP accept operation */
/* Initialize the state structure. This is done with interrupts
* disabled because we don't want anything to happen until we
* are ready.
*/
state.acpt_addr = inaddr;
state.acpt_newconn = NULL;
state.acpt_result = OK;
sem_init(&state.acpt_sem, 0, 0);
/* Set up the callback in the connection */
conn->accept_private = (void*)&state;
conn->accept = accept_interrupt;
/* Wait for the send to complete or an error to occur: NOTES: (1)
* uip_lockedwait will also terminate if a signal is received, (2) interrupts
* may be disabled! They will be re-enabled while the task sleeps and
* automatically re-enabled when the task restarts.
*/
ret = uip_lockedwait(&state.acpt_sem);
/* Make sure that no further interrupts are processed */
conn->accept_private = NULL;
conn->accept = NULL;
sem_destroy(&state. acpt_sem);
/* Set the socket state to idle */
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);
/* Check for a errors. Errors are signaled by negative errno values
* for the send length.
*/
if (state.acpt_result != 0)
{
err = state.acpt_result;
goto errout_with_lock;
}
/* If uip_lockedwait failed, then we were probably reawakened by a signal. In
* this case, uip_lockedwait will have set errno appropriately.
*/
if (ret < 0)
{
err = -ret;
goto errout_with_lock;
}
}
/* Initialize the socket structure and mark the socket as connected.
* (The reference count on the new connection structure was set in the
* interrupt handler).
*/
pnewsock->s_type = SOCK_STREAM;
pnewsock->s_conn = state.acpt_newconn;
pnewsock->s_flags |= _SF_CONNECTED;
pnewsock->s_flags &= ~_SF_CLOSED;
/* Begin monitoring for TCP connection events on the newly connected socket */
net_startmonitor(pnewsock);
uip_unlock(save);
return newfd;
errout_with_lock:
uip_unlock(save);
errout_with_socket:
sockfd_release(newfd);
errout:
errno = err;
return ERROR;
}
int psock_tcp_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen, FAR void **newconn)
{
FAR struct tcp_conn_s *conn;
struct accept_s state;
int ret;
DEBUGASSERT(psock && newconn);
/* Check the backlog to see if there is a connection already pending for
* this listener.
*/
conn = (FAR struct tcp_conn_s *)psock->s_conn;
#ifdef CONFIG_NET_TCPBACKLOG
state.acpt_newconn = tcp_backlogremove(conn);
if (state.acpt_newconn)
{
/* Yes... get the address of the connected client */
ninfo("Pending conn=%p\n", state.acpt_newconn);
accept_tcpsender(psock, state.acpt_newconn, addr, addrlen);
}
/* In general, this implementation will not support non-blocking socket
* operations... except in a few cases: Here for TCP accept with
* backlog enabled. If this socket is configured as non-blocking then
* return EAGAIN if there is no pending connection in the backlog.
*/
else if (_SS_ISNONBLOCK(psock->s_flags))
{
return -EAGAIN;
}
else
#endif
{
/* Set the socket state to accepting */
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_ACCEPT);
/* Perform the TCP accept operation */
/* Initialize the state structure. This is done with the network
* locked because we don't want anything to happen until we are
* ready.
*/
state.acpt_sock = psock;
state.acpt_addr = addr;
state.acpt_addrlen = addrlen;
state.acpt_newconn = NULL;
state.acpt_result = OK;
/* This semaphore is used for signaling and, hence, should not have
* priority inheritance enabled.
*/
nxsem_init(&state.acpt_sem, 0, 0);
nxsem_setprotocol(&state.acpt_sem, SEM_PRIO_NONE);
/* Set up the callback in the connection */
conn->accept_private = (FAR void *)&state;
conn->accept = accept_eventhandler;
/* Wait for the send to complete or an error to occur: NOTES:
* net_lockedwait will also terminate if a signal is received.
*/
ret = net_lockedwait(&state.acpt_sem);
/* Make sure that no further events are processed */
conn->accept_private = NULL;
conn->accept = NULL;
nxsem_destroy(&state. acpt_sem);
/* Set the socket state to idle */
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);
/* Check for a errors. Errors are signalled by negative errno values
* for the send length.
*/
if (state.acpt_result != 0)
{
DEBUGASSERT(state.acpt_result > 0);
return -state.acpt_result;
}
/* If net_lockedwait failed, then we were probably reawakened by a
* signal. In this case, net_lockedwait will have returned negated
* errno appropriately.
*/
if (ret < 0)
{
return ret;
}
}
*newconn = (FAR void *)state.acpt_newconn;
return OK;
}
int psock_tcp_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen, FAR void **newconn)
{
FAR struct tcp_conn_s *conn;
struct accept_s state;
int ret;
DEBUGASSERT(psock && newconn);
/* Check the backlog to see if there is a connection already pending for
* this listener.
*/
conn = (FAR struct tcp_conn_s *)psock->s_conn;
#ifdef CONFIG_NET_TCPBACKLOG
state.acpt_newconn = tcp_backlogremove(conn);
if (state.acpt_newconn)
{
/* Yes... get the address of the connected client */
nvdbg("Pending conn=%p\n", state.acpt_newconn);
accept_tcpsender(psock, state.acpt_newconn, addr, addrlen);
}
/* In general, this uIP-based implementation will not support non-blocking
* socket operations... except in a few cases: Here for TCP accept with
* backlog enabled. If this socket is configured as non-blocking then
* return EAGAIN if there is no pending connection in the backlog.
*/
else if (_SS_ISNONBLOCK(psock->s_flags))
{
return -EAGAIN;
}
else
#endif
{
/* Set the socket state to accepting */
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_ACCEPT);
/* Perform the TCP accept operation */
/* Initialize the state structure. This is done with interrupts
* disabled because we don't want anything to happen until we
* are ready.
*/
state.acpt_sock = psock;
state.acpt_addr = addr;
state.acpt_addrlen = addrlen;
state.acpt_newconn = NULL;
state.acpt_result = OK;
sem_init(&state.acpt_sem, 0, 0);
/* Set up the callback in the connection */
conn->accept_private = (FAR void *)&state;
conn->accept = accept_interrupt;
/* Wait for the send to complete or an error to occur: NOTES: (1)
* net_lockedwait will also terminate if a signal is received, (2)
* interrupts may be disabled! They will be re-enabled while the
* task sleeps and automatically re-enabled when the task restarts.
*/
ret = net_lockedwait(&state.acpt_sem);
if (ret < 0)
{
/* The value returned by net_lockedwait() the same as the value
* returned by sem_wait(): Zero (OK) is returned on success; -1
* (ERROR) is returned on a failure with the errno value set
* appropriately.
*
* We have to preserve the errno value here because it may be
* altered by intervening operations.
*/
ret = -get_errno();
DEBUGASSERT(ret < 0);
}
/* Make sure that no further interrupts are processed */
conn->accept_private = NULL;
conn->accept = NULL;
sem_destroy(&state. acpt_sem);
/* Set the socket state to idle */
psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_IDLE);
/* Check for a errors. Errors are signalled by negative errno values
* for the send length.
*/
if (state.acpt_result != 0)
{
DEBUGASSERT(state.acpt_result > 0);
return -state.acpt_result;
}
/* If net_lockedwait failed, then we were probably reawakened by a
* signal. In this case, logic above will have set 'ret' to the
* errno value returned by net_lockedwait().
*/
if (ret < 0)
{
return ret;
}
}
*newconn = (FAR void *)state.acpt_newconn;
return OK;
}
