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Networking: Move TCP specific logic out of net/socket/accept.c to net/tcp/tcp_accept.c; add hooks for local, Unix doamin sockets

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This commit is contained in:
Gregory Nutt 2015-01-25 15:46:05 -06:00
parent 0def771c8d
commit 90e59217c6
4 changed files with 115 additions and 278 deletions
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26
net/local/local.h
View File

@ -256,6 +256,32 @@ int local_listen(FAR struct local_conn_s *server, int backlog);
int local_release(FAR struct local_conn_s *conn);
/****************************************************************************
* Function: psock_local_accept
*
* Description:
* This function implements accept() for Unix domain sockets. See the
* description of accept() for further information.
*
* Parameters:
* psock The listening Unix domain socket structure
* addr Receives the address of the connecting client
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
* newconn The new, accepted Unix domain connection structure
*
* Returned Value:
* Returns zero (OK) on success or a negated errno value on failure.
* See the description of accept of the possible errno values in the
* description of accept().
*
* Assumptions:
* Network is NOT locked.
*
****************************************************************************/
int psock_local_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen, FAR void **newconn);
/****************************************************************************
* Name: psock_local_send
*

322
net/socket/accept.c
View File

@ -43,160 +43,18 @@
#include <sys/types.h>
#include <sys/socket.h>
#include <semaphore.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <debug.h>
#include <arch/irq.h>
#include <nuttx/net/net.h>
#include <nuttx/net/ip.h>
#include "tcp/tcp.h"
#include "local/local.h"
#include "socket/socket.h"
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Private Types
****************************************************************************/
struct accept_s
{
FAR struct socket *acpt_sock; /* The accepting socket */
sem_t acpt_sem; /* Wait for interrupt event */
FAR struct sockaddr *acpt_addr; /* Return connection address */
FAR struct tcp_conn_s *acpt_newconn; /* The accepted connection */
int acpt_result; /* The result of the wait */
};
/****************************************************************************
* Private Data
****************************************************************************/
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Function: accept_tcpsender
*
* Description:
* Get the sender's address from the UDP packet
*
* Parameters:
* psock - The state structure of the accepting socket
* conn - The newly accepted TCP connection
* pstate - the recvfrom state structure
*
* Returned Value:
* None
*
* Assumptions:
* Running at the interrupt level
*
****************************************************************************/
#ifdef CONFIG_NET_TCP
static inline void accept_tcpsender(FAR struct socket *psock,
FAR struct tcp_conn_s *conn,
FAR struct sockaddr *addr)
{
if (addr)
{
#ifdef CONFIG_NET_IPv4
#ifdef CONFIG_NET_IPv6
/* If both IPv4 and IPv6 support are enabled, then we will need to
* select which one to use when obtaining the sender's IP address.
*/
if (psock->s_domain == PF_INET)
#endif /* CONFIG_NET_IPv6 */
{
FAR struct sockaddr_in *inaddr = (FAR struct sockaddr_in *)addr;
inaddr->sin_family = AF_INET;
inaddr->sin_port = conn->rport;
net_ipv4addr_copy(inaddr->sin_addr.s_addr, conn->u.ipv4.raddr);
}
#endif /* CONFIG_NET_IPv4 */
#ifdef CONFIG_NET_IPv6
#ifdef CONFIG_NET_IPv4
/* Otherwise, this the IPv6 address is needed */
else
#endif /* CONFIG_NET_IPv4 */
{
FAR struct sockaddr_in6 *inaddr = (FAR struct sockaddr_in6 *)addr;
DEBUGASSERT(psock->s_domain == PF_INET6);
inaddr->sin6_family = AF_INET6;
inaddr->sin6_port = conn->rport;
net_ipv6addr_copy(inaddr->sin6_addr.s6_addr, conn->u.ipv6.raddr);
}
#endif /* CONFIG_NET_IPv6 */
}
}
#endif /* CONFIG_NET_TCP */
/****************************************************************************
* Function: accept_interrupt
*
* Description:
* Receive interrupt level callbacks when connections occur
*
* Parameters:
* listener The conection stucture of the listener
* conn The connection stucture that was just accepted
*
* Returned Value:
* None
*
* Assumptions:
* Running at the interrupt level
*
****************************************************************************/
static int accept_interrupt(FAR struct tcp_conn_s *listener,
FAR struct tcp_conn_s *conn)
{
struct accept_s *pstate = (struct accept_s *)listener->accept_private;
int ret = -EINVAL;
if (pstate)
{
/* Get the connection address */
accept_tcpsender(pstate->acpt_sock, 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;
}
/****************************************************************************
* Public Functions
****************************************************************************/
@ -229,7 +87,7 @@ static int accept_interrupt(FAR struct tcp_conn_s *listener,
* connections are present on the queue, accept returns EAGAIN.
*
* Parameters:
* sockfd The listening socket descriptior
* sockfd The listening socket descriptor
* addr Receives the address of the connecting client
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
*
@ -275,8 +133,6 @@ int accept(int sockfd, FAR struct sockaddr *addr, FAR socklen_t *addrlen)
{
FAR struct socket *psock = sockfd_socket(sockfd);
FAR struct socket *pnewsock;
FAR struct tcp_conn_s *conn;
struct accept_s state;
net_lock_t save;
int newfd;
int err;
@ -327,6 +183,12 @@ int accept(int sockfd, FAR struct sockaddr *addr, FAR socklen_t *addrlen)
if (addr)
{
/* If an address is provided, then the lenght must also be provided. */
DEBUGASSERT(addrlen);
/* A valid length depends on the address domain */
switch (psock->s_domain)
{
#ifdef CONFIG_NET_IPv4
@ -353,6 +215,18 @@ int accept(int sockfd, FAR struct sockaddr *addr, FAR socklen_t *addrlen)
break;
#endif /* CONFIG_NET_IPv6 */
#ifdef CONFIG_NET_LOCAL
case PF_LOCAL:
{
if (*addrlen < sizeof(sa_family_t))
{
err = EBADF;
goto errout;
}
}
break;
#endif /* CONFIG_NET_IPv6 */
default:
DEBUGPANIC();
err = EINVAL;
@ -378,132 +252,54 @@ int accept(int sockfd, FAR struct sockaddr *addr, FAR socklen_t *addrlen)
goto errout_with_socket;
}
/* Check the backlog to see if there is a connection already pending for
* this listener.
*/
save = net_lock();
conn = (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);
}
/* 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_sock = psock;
state.acpt_addr = addr;
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)
* 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.
*/
err = get_errno();
}
/* 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)
{
err = state.acpt_result;
goto errout_with_lock;
}
/* If net_lockedwait failed, then we were probably reawakened by a
* signal. In this case, logic above will have set 'err' to the
* ernno value returned by net_lockedwait().
*/
if (ret < 0)
{
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).
*/
/* Initialize the socket structure and mark the socket as connected. */
pnewsock->s_domain = psock->s_domain;
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 */
/* Perform the correct accept operation for this address domain */
#ifdef CONFIG_NET_LOCAL
#ifdef CONFIG_NET_TCP
if (psock->s_domain == PF_LOCAL)
#endif
{
ret = psock_local_accept(psock, addr, addrlen, &pnewsock->s_conn);
if (ret < 0)
{
err = -ret;
goto errout_with_socket;
}
}
#endif /* CONFIG_NET_LOCAL */
#ifdef CONFIG_NET_TCP
#ifdef CONFIG_NET_LOCAL
else
#endif
{
save = net_lock();
ret = psock_tcp_accept(psock, addr, addrlen, &pnewsock->s_conn);
if (ret < 0)
{
net_unlock(save);
err = -ret;
goto errout_with_socket;
}
/* Begin monitoring for TCP connection events on the newly connected
* socket
*/
net_startmonitor(pnewsock);
net_unlock(save);
}
#endif /* CONFIG_NET_TCP */
net_startmonitor(pnewsock);
net_unlock(save);
return newfd;
errout_with_lock:
net_unlock(save);
errout_with_socket:
sockfd_release(newfd);

2
net/tcp/Make.defs
View File

@ -39,6 +39,8 @@ ifeq ($(CONFIG_NET_TCP),y)
# Socket layer
SOCK_CSRCS += tcp_accept.c
ifeq ($(CONFIG_NET_TCP_WRITE_BUFFERS),y)
SOCK_CSRCS += tcp_send_buffered.c
else

43
net/tcp/tcp.h
View File

@ -267,9 +267,8 @@ extern "C"
* Public Function Prototypes
****************************************************************************/
/* Defined in tcp_conn.c ****************************************************/
struct sockaddr; /* Forward reference */
struct sockaddr; /* Forward reference */
struct socket; /* Forward reference */
/****************************************************************************
* Name: tcp_initialize
@ -389,7 +388,6 @@ int tcp_bind(FAR struct tcp_conn_s *conn, FAR const struct sockaddr *addr);
int tcp_connect(FAR struct tcp_conn_s *conn, FAR const struct sockaddr *addr);
/* Defined in tcp_ipselect.c ************************************************/
/****************************************************************************
* Function: tcp_ipv4_select
*
@ -414,7 +412,6 @@ void tcp_ipv4_select(FAR struct net_driver_s *dev);
void tcp_ipv6_select(FAR struct net_driver_s *dev);
#endif
/* Defined in tcp_seqno.c ***************************************************/
/****************************************************************************
* Name: tcp_setsequence
*
@ -481,7 +478,6 @@ void tcp_initsequence(FAR uint8_t *seqno);
void tcp_nextsequence(void);
/* Defined in tcp_poll.c ****************************************************/
/****************************************************************************
* Name: tcp_poll
*
@ -502,7 +498,6 @@ void tcp_nextsequence(void);
void tcp_poll(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn);
/* Defined in tcp_timer.c ***************************************************/
/****************************************************************************
* Name: tcp_timer
*
@ -525,7 +520,6 @@ void tcp_poll(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn);
void tcp_timer(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
int hsec);
/* Defined in tcp_listen.c **************************************************/
/****************************************************************************
* Function: tcp_listen_initialize
*
@ -593,7 +587,6 @@ bool tcp_islistener(uint16_t portno);
int tcp_accept_connection(FAR struct net_driver_s *dev,
FAR struct tcp_conn_s *conn, uint16_t portno);
/* Defined in tcp_send.c ****************************************************/
/****************************************************************************
* Name: tcp_send
*
@ -658,7 +651,6 @@ void tcp_reset(FAR struct net_driver_s *dev);
void tcp_ack(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
uint8_t ack);
/* Defined in tcp_appsend.c *************************************************/
/****************************************************************************
* Name: tcp_appsend
*
@ -705,7 +697,6 @@ void tcp_appsend(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
void tcp_rexmit(FAR struct net_driver_s *dev, FAR struct tcp_conn_s *conn,
uint16_t result);
/* Defined in tcp_input.c ***************************************************/
/****************************************************************************
* Name: tcp_ipv4_input
*
@ -748,7 +739,6 @@ void tcp_ipv4_input(FAR struct net_driver_s *dev);
void tcp_ipv6_input(FAR struct net_driver_s *dev);
#endif
/* Defined in tcp_callback.c ************************************************/
/****************************************************************************
* Function: tcp_callback
*
@ -794,7 +784,6 @@ uint16_t tcp_datahandler(FAR struct tcp_conn_s *conn, FAR uint8_t *buffer,
uint16_t nbytes);
#endif
/* Defined in tcp_backlog.c *************************************************/
/****************************************************************************
* Function: tcp_backlogcreate
*
@ -910,7 +899,32 @@ int tcp_backlogdelete(FAR struct tcp_conn_s *conn,
# define tcp_backlogdelete(c,b) (-ENOSYS)
#endif
/* Defined in tcp_send_buffered.c or tcp_send_unbuffered.c ******************/
/****************************************************************************
* Function: tcp_accept
*
* Description:
* This function implements accept() for TCP/IP sockets. See the
* description of accept() for further information.
*
* Parameters:
* psock The listening TCP socket structure
* addr Receives the address of the connecting client
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
* newconn The new, accepted TCP connection structure
*
* Returned Value:
* Returns zero (OK) on success or a negated errno value on failure.
* See the description of accept of the possible errno values in the
* description of accept().
*
* Assumptions:
* Network is locked.
*
****************************************************************************/
int psock_tcp_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen, FAR void **newconn);
/****************************************************************************
* Function: psock_tcp_send
*
@ -972,7 +986,6 @@ struct socket;
ssize_t psock_tcp_send(FAR struct socket *psock, FAR const void *buf,
size_t len);
/* Defined in tcp_wrbuffer.c ************************************************/
/****************************************************************************
* Function: tcp_wrbuffer_initialize
*