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author | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-11-22 14:42:52 +0000 |
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committer | patacongo <patacongo@42af7a65-404d-4744-a932-0658087f49c3> | 2007-11-22 14:42:52 +0000 |
commit | 7d4b2f6253d8ac898def6839b2ccc2ae61e24135 (patch) | |
tree | 36587b181e76fc8790f7472f64316c9bb620a31e /nuttx/net/netdev-findbyaddr.c | |
parent | 2ad451b8005afc667718569077c816195f8bd9ec (diff) | |
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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@397 42af7a65-404d-4744-a932-0658087f49c3
Diffstat (limited to 'nuttx/net/netdev-findbyaddr.c')
-rw-r--r-- | nuttx/net/netdev-findbyaddr.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/nuttx/net/netdev-findbyaddr.c b/nuttx/net/netdev-findbyaddr.c new file mode 100644 index 000000000..c751960bf --- /dev/null +++ b/nuttx/net/netdev-findbyaddr.c @@ -0,0 +1,128 @@ +/**************************************************************************** + * net/netdev-findbyaddr.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 <string.h> +#include <errno.h> +#include <debug.h> + +#include <net/uip/uip-arch.h> + +#include "net-internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +/**************************************************************************** + * Priviate Types + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +/**************************************************************************** + * Public Data + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: netdev_maskcmp + ****************************************************************************/ + +static inline boolean netdev_maskcmp(uip_ipaddr_t *ipaddr, uip_ipaddr_t *raddr, + uip_ipaddr_t *netmask) +{ +#ifndef CONFIG_NET_IPv6 + return (*ipaddr & *netmask) == (*raddr & *netmask); +#else +# warning "Not implemented for IPv6" +#endif +} + +/**************************************************************************** + * Global Functions + ****************************************************************************/ + +/**************************************************************************** + * Function: netdev_findbyaddr + * + * Description: + * Find a previously registered network device by matching a remote address + * with the subnet served by the device + * + * Parameters: + * raddr - Pointer to the remote address of a connection + * + * Returned Value: + * Pointer to driver on success; null on failure + * + * Assumptions: + * Called from normal user mode + * + ****************************************************************************/ + +FAR struct uip_driver_s *netdev_findbyaddr(uip_ipaddr_t *raddr) +{ + struct uip_driver_s *dev; + + if (raddr) + { + netdev_semtake(); + for (dev = g_netdevices; dev; dev = dev->flink) + { + if (netdev_maskcmp(&dev->d_ipaddr, raddr, &dev->d_netmask)) + { + netdev_semgive(); + return dev; + } + } + netdev_semgive(); + } + return NULL; +} + +#endif /* CONFIG_NET && CONFIG_NSOCKET_DESCRIPTORS */ |