From 2c857524a54906a5aaa42bdf803dddd6b3b110de Mon Sep 17 00:00:00 2001 From: patacongo Date: Tue, 28 Aug 2007 00:18:50 +0000 Subject: Corrects UIP driver build git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@314 42af7a65-404d-4744-a932-0658087f49c3 --- nuttx/arch/sim/src/up_tapdev.c | 205 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 205 insertions(+) create mode 100644 nuttx/arch/sim/src/up_tapdev.c (limited to 'nuttx/arch/sim/src/up_tapdev.c') diff --git a/nuttx/arch/sim/src/up_tapdev.c b/nuttx/arch/sim/src/up_tapdev.c new file mode 100644 index 000000000..e03304846 --- /dev/null +++ b/nuttx/arch/sim/src/up_tapdev.c @@ -0,0 +1,205 @@ +/**************************************************************************** + * up_tapdev.c + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt + * + * Based on code from uIP which also has a BSD-like license: + * + * Copyright (c) 2001, Adam Dunkels. + * All rights reserved. + * + * 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 +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#if 0 +#include "uip/uip.h" +#include +#include +#endif + +#ifdef linux +# include +# include +# include +# define DEVTAP "/dev/net/tun" +#else /* linux */ +# define DEVTAP "/dev/tap0" +#endif /* linux */ + +/**************************************************************************** + * Private Definitions + ****************************************************************************/ + +#define TAPDEV_DEBUG 1 + +#define UIP_DRIPADDR0 192 +#define UIP_DRIPADDR1 168 +#define UIP_DRIPADDR2 0 +#define UIP_DRIPADDR3 1 + +/**************************************************************************** + * Private Types + ****************************************************************************/ + +/**************************************************************************** + * Private Function Prototypes + ****************************************************************************/ + +/**************************************************************************** + * Private Data + ****************************************************************************/ + +#ifdef TAPDEV_DEBUG +static int drop = 0; +#endif +static int fd; + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +unsigned long up_getwalltime( void ) +{ + struct timeval tm; + (void)gettimeofday(&tm, NULL); + return tm.tv_sec*1000 + tm.tv_usec/1000; +} + +void tapdev_init(void) +{ + char buf[1024]; + + fd = open(DEVTAP, O_RDWR); + if(fd == -1) + { + printf("tapdev: tapdev_init: open"); + return; + } + +#ifdef linux + { + struct ifreq ifr; + memset(&ifr, 0, sizeof(ifr)); + ifr.ifr_flags = IFF_TAP|IFF_NO_PI; + if (ioctl(fd, TUNSETIFF, (void *) &ifr) < 0) + { + printf(buf); + return; + } + } +#endif /* Linux */ + + snprintf(buf, sizeof(buf), "ifconfig tap0 inet %d.%d.%d.%d", + UIP_DRIPADDR0, UIP_DRIPADDR1, UIP_DRIPADDR2, UIP_DRIPADDR3); + system(buf); +} + +unsigned int tapdev_read(char *buf, unsigned int buflen) +{ + fd_set fdset; + struct timeval tv; + int ret; + + tv.tv_sec = 0; + tv.tv_usec = 1000; + + FD_ZERO(&fdset); + FD_SET(fd, &fdset); + + ret = select(fd + 1, &fdset, NULL, NULL, &tv); + if(ret == 0) + { + return 0; + } + + ret = read(fd, buf, buflen); + if(ret == -1) + { + printf("tap_dev: tapdev_read: read"); + } + +#ifdef TAPDEV_DEBUG + printf("tap_dev: tapdev_read: read %d bytes\n", ret); + { + int i; + for(i = 0; i < 20; i++) + { + printf("%x ", buf[i]); + } + printf("\n"); + } +#endif + + return ret; +} + +void tapdev_send(char *buf, unsigned int buflen) +{ + int ret; +#ifdef TAPDEV_DEBUG + printf("tapdev_send: sending %d bytes\n", buflen); + + drop++; + if(drop % 8 == 7) + { + printf("Dropped a packet!\n"); + return; + } +#endif + + ret = write(fd, buf, buflen); + if(ret == -1) + { + perror("tap_dev: tapdev_send: write"); + exit(1); + } +} + -- cgit v1.2.3