diff options
Diffstat (limited to 'nuttx/net/pkt')
-rw-r--r-- | nuttx/net/pkt/Make.defs | 7 | ||||
-rw-r--r-- | nuttx/net/pkt/pkt.h | 140 | ||||
-rw-r--r-- | nuttx/net/pkt/pkt_send.c | 307 |
3 files changed, 454 insertions, 0 deletions
diff --git a/nuttx/net/pkt/Make.defs b/nuttx/net/pkt/Make.defs index f9ea5b270..b1ba37896 100644 --- a/nuttx/net/pkt/Make.defs +++ b/nuttx/net/pkt/Make.defs @@ -38,6 +38,13 @@ ifeq ($(CONFIG_NET),y) # Packet socket support ifeq ($(CONFIG_NET_PKT),y) + +# Socket layer + +SOCK_CSRCS += pkt_send.c + +# Transport layer + NET_CSRCS += pkt_conn.c NET_CSRCS += pkt_input.c NET_CSRCS += pkt_callback.c diff --git a/nuttx/net/pkt/pkt.h b/nuttx/net/pkt/pkt.h new file mode 100644 index 000000000..b0d24f230 --- /dev/null +++ b/nuttx/net/pkt/pkt.h @@ -0,0 +1,140 @@ +/**************************************************************************** + * net/pkt/pkt.h + * + * Copyright (C) 2014 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +#ifndef _NET_PKT_PKT_H +#define _NET_PKT_PKT_H + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> + +#include <sys/types.h> + +#ifdef CONFIG_NET_PKT + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Type Definitions + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +#ifdef __cplusplus +# define EXTERN extern "C" +extern "C" +{ +#else +# define EXTERN extern +#endif + +/**************************************************************************** + * Public Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Function: pkt_send + * + * Description: + * The pkt_send() call may be used only when the packet socket is in a + * connected state (so that the intended recipient is known). + * + * Parameters: + * psock An instance of the internal socket structure. + * buf Data to send + * len Length of data to send + * + * Returned Value: + * On success, returns the number of characters sent. On error, + * -1 is returned, and errno is set appropriately: + * + * EAGAIN or EWOULDBLOCK + * The socket is marked non-blocking and the requested operation + * would block. + * EBADF + * An invalid descriptor was specified. + * ECONNRESET + * Connection reset by peer. + * EDESTADDRREQ + * The socket is not connection-mode, and no peer address is set. + * EFAULT + * An invalid user space address was specified for a parameter. + * EINTR + * A signal occurred before any data was transmitted. + * EINVAL + * Invalid argument passed. + * EISCONN + * The connection-mode socket was connected already but a recipient + * was specified. (Now either this error is returned, or the recipient + * specification is ignored.) + * EMSGSIZE + * The socket type requires that message be sent atomically, and the + * size of the message to be sent made this impossible. + * ENOBUFS + * The output queue for a network interface was full. This generally + * indicates that the interface has stopped sending, but may be + * caused by transient congestion. + * ENOMEM + * No memory available. + * ENOTCONN + * The socket is not connected, and no target has been given. + * ENOTSOCK + * The argument s is not a socket. + * EPIPE + * The local end has been shut down on a connection oriented socket. + * In this case the process will also receive a SIGPIPE unless + * MSG_NOSIGNAL is set. + * + * Assumptions: + * + ****************************************************************************/ + +struct socket; +ssize_t pkt_send(FAR struct socket *psock, FAR const void *buf, size_t len); + + +#undef EXTERN +#ifdef __cplusplus +} +#endif + +#endif /* CONFIG_NET_PKT */ +#endif /* _NET_PKT_PKT_H */ diff --git a/nuttx/net/pkt/pkt_send.c b/nuttx/net/pkt/pkt_send.c new file mode 100644 index 000000000..5cfd3d7de --- /dev/null +++ b/nuttx/net/pkt/pkt_send.c @@ -0,0 +1,307 @@ +/**************************************************************************** + * net/pkt/pkt_send.c + * + * Copyright (C) 2014 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <gnutt@nuttx.org> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name NuttX nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + ****************************************************************************/ + +/**************************************************************************** + * Included Files + ****************************************************************************/ + +#include <nuttx/config.h> +#if defined(CONFIG_NET) && defined(CONFIG_NET_PKT) + +#include <sys/types.h> +#include <sys/socket.h> + +#include <stdint.h> +#include <stdbool.h> +#include <string.h> +#include <errno.h> +#include <debug.h> + +#include <arch/irq.h> +#include <nuttx/clock.h> +#include <nuttx/net/arp.h> +#include <nuttx/net/uip/uip-arch.h> +#include <nuttx/net/uip/uip-pkt.h> + +#include "net_internal.h" +#include "uip/uip_internal.h" + +/**************************************************************************** + * Pre-processor Definitions + ****************************************************************************/ + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/* This structure holds the state of the send operation until it can be + * operated upon from the interrupt level. + */ + +struct send_s +{ + FAR struct socket *snd_sock; /* Points to the parent socket structure */ + FAR struct uip_callback_s *snd_cb; /* Reference to callback instance */ + sem_t snd_sem; /* Used to wake up the waiting thread */ + FAR const uint8_t *snd_buffer; /* Points to the buffer of data to send */ + size_t snd_buflen; /* Number of bytes in the buffer to send */ + ssize_t snd_sent; /* The number of bytes sent */ +}; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: pktsend_interrupt + ****************************************************************************/ + +static uint16_t pktsend_interrupt(FAR struct uip_driver_s *dev, + FAR void *pvconn, + FAR void *pvpriv, uint16_t flags) +{ + FAR struct send_s *pstate = (FAR struct send_s *)pvpriv; + + nllvdbg("flags: %04x sent: %d\n", flags, pstate->snd_sent); + + if (pstate) + { + /* Check if the outgoing packet is available. If my have been claimed + * by a send interrupt serving a different thread -OR- if the output + * buffer currently contains unprocessed incoming data. In these cases + * we will just have to wait for the next polling cycle. + */ + + if (dev->d_sndlen > 0 || (flags & UIP_NEWDATA) != 0) + { + /* Another thread has beat us sending data or the buffer is busy, + * Check for a timeout. If not timed out, wait for the next + * polling cycle and check again. + */ + + /* No timeout. Just wait for the next polling cycle */ + + return flags; + } + + /* It looks like we are good to send the data */ + + else + { + /* Copy the packet data into the device packet buffer and send it */ + + uip_pktsend(dev, pstate->snd_buffer, pstate->snd_buflen); + pstate->snd_sent = pstate->snd_buflen; + } + + /* Don't allow any further call backs. */ + + pstate->snd_cb->flags = 0; + pstate->snd_cb->priv = NULL; + pstate->snd_cb->event = NULL; + + /* Wake up the waiting thread */ + + sem_post(&pstate->snd_sem); + } + + return flags; +} + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: pkt_send + * + * Description: + * The pkt_send() call may be used only when the packet socket is in a + * connected state (so that the intended recipient is known). + * + * Parameters: + * psock An instance of the internal socket structure. + * buf Data to send + * len Length of data to send + * + * Returned Value: + * On success, returns the number of characters sent. On error, + * -1 is returned, and errno is set appropriately: + * + * EAGAIN or EWOULDBLOCK + * The socket is marked non-blocking and the requested operation + * would block. + * EBADF + * An invalid descriptor was specified. + * ECONNRESET + * Connection reset by peer. + * EDESTADDRREQ + * The socket is not connection-mode, and no peer address is set. + * EFAULT + * An invalid user space address was specified for a parameter. + * EINTR + * A signal occurred before any data was transmitted. + * EINVAL + * Invalid argument passed. + * EISCONN + * The connection-mode socket was connected already but a recipient + * was specified. (Now either this error is returned, or the recipient + * specification is ignored.) + * EMSGSIZE + * The socket type requires that message be sent atomically, and the + * size of the message to be sent made this impossible. + * ENOBUFS + * The output queue for a network interface was full. This generally + * indicates that the interface has stopped sending, but may be + * caused by transient congestion. + * ENOMEM + * No memory available. + * ENOTCONN + * The socket is not connected, and no target has been given. + * ENOTSOCK + * The argument s is not a socket. + * EPIPE + * The local end has been shut down on a connection oriented socket. + * In this case the process will also receive a SIGPIPE unless + * MSG_NOSIGNAL is set. + * + * Assumptions: + * + ****************************************************************************/ + +ssize_t pkt_send(FAR struct socket *psock, FAR const void *buf, size_t len) +{ + struct send_s state; + uip_lock_t save; + int err; + int ret = OK; + + /* Verify that the sockfd corresponds to valid, allocated socket */ + + if (!psock || psock->s_crefs <= 0) + { + err = EBADF; + goto errout; + } + + /* Set the socket state to sending */ + + psock->s_flags = _SS_SETSTATE(psock->s_flags, _SF_SEND); + + /* Perform the send operation */ + + /* Initialize the state structure. This is done with interrupts + * disabled because we don't want anything to happen until we + * are ready. + */ + + save = uip_lock(); + memset(&state, 0, sizeof(struct send_s)); + (void)sem_init(&state.snd_sem, 0, 0); /* Doesn't really fail */ + state.snd_sock = psock; /* Socket descriptor to use */ + state.snd_buflen = len; /* Number of bytes to send */ + state.snd_buffer = buf; /* Buffer to send from */ + + if (len > 0) + { + struct uip_pkt_conn *conn = (struct uip_pkt_conn*)psock->s_conn; + + /* Allocate resource to receive a callback */ + + state.snd_cb = uip_pktcallbackalloc(conn); + if (state.snd_cb) + { + /* Set up the callback in the connection */ + + state.snd_cb->flags = UIP_POLL; + state.snd_cb->priv = (void*)&state; + state.snd_cb->event = pktsend_interrupt; + + /* Notify the device driver of the availability of TX data */ + + struct uip_driver_s *dev = netdev_findbyname("eth0"); + dev->d_txavail(dev); + + /* Wait for the send to complete or an error to occure: 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.snd_sem); + + /* Make sure that no further interrupts are processed */ + + uip_pktcallbackfree(conn, state.snd_cb); + } + } + + sem_destroy(&state.snd_sem); + uip_unlock(save); + + /* 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.snd_sent < 0) + { + err = state.snd_sent; + goto errout; + } + + /* 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; + } + + /* Return the number of bytes actually sent */ + + return state.snd_sent; + +errout: + set_errno(err); + return ERROR; +} + +#endif /* CONFIG_NET && CONFIG_NET_PKT */ |