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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-09-16 17:46:25 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-09-16 17:46:25 +0000 |
commit | 4077a70fc256a7dd65febe986f176b8ac62091fc (patch) | |
tree | 6f0e34d559c8fa2f07c686043df3494cd7fdcff2 /nuttx/net/netdev-register.c | |
parent | 42027d080b72b8198072e7dc3933d8b70b6b40a5 (diff) | |
download | px4-nuttx-4077a70fc256a7dd65febe986f176b8ac62091fc.tar.gz px4-nuttx-4077a70fc256a7dd65febe986f176b8ac62091fc.tar.bz2 px4-nuttx-4077a70fc256a7dd65febe986f176b8ac62091fc.zip |
Add basic structure to support netdevice ioctls
git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@344 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/net/netdev-register.c')
-rw-r--r-- | nuttx/net/netdev-register.c | 147 |
1 files changed, 147 insertions, 0 deletions
diff --git a/nuttx/net/netdev-register.c b/nuttx/net/netdev-register.c new file mode 100644 index 000000000..736c5e782 --- /dev/null +++ b/nuttx/net/netdev-register.c @@ -0,0 +1,147 @@ +/**************************************************************************** + * net/netdev-register.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * 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) && CONFIG_NSOCKET_DESCRIPTORS > 0 + +#include <sys/types.h> +#include <sys/socket.h> +#include <stdio.h> +#include <semaphore.h> +#include <assert.h> +#include <string.h> +#include <errno.h> + +#include <net/uip/uip-arch.h> + +#include "net-internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Priviate Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +static int g_next_devnum = 0; + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/* List of registered ethernet device drivers */ +struct uip_driver_s *g_netdevices = NULL; +sem_t g_netdev_sem; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: netdev_semtake + * + * Description: + * Managed access to the network device list + * + ****************************************************************************/ + +void netdev_semtake(void) +{ + /* Take the semaphore (perhaps waiting) */ + + while (sem_wait(&g_netdev_sem) != 0) + { + /* The only case that an error should occr here is if + * the wait was awakened by a signal. + */ + + ASSERT(*get_errno_ptr() == EINTR); + } +} + +/**************************************************************************** + * Function: netdev_register + * + * Description: + * Register a netword device driver and assign a name to it so tht it can + * be found in subsequent network ioctl operations on the device. + * + * Parameters: + * dev - The device driver structure to register + * + * Returned Value: + * 0:Success; -1 on failure + * + * Assumptions: + * Called during system initialization from normal user mode + * + ****************************************************************************/ + +int netdev_register(FAR struct uip_driver_s *dev) +{ + if (dev) + { + int devnum; + netdev_semtake(); + + /* Assign a device name to the the interface */ + + devnum = g_next_devnum++; + snprintf( dev->d_ifname, IFNAMSIZ, "eth%d", devnum ); + + /* Add the device to the list of known network devices */ + + dev->flink = g_netdevices; + g_netdevices = dev; + netdev_semgive(); + return OK; + } + return ERROR; +} + +#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */ |