diff options
Diffstat (limited to 'nuttx/net/uip/uip_icmpsend.c')
-rw-r--r-- | nuttx/net/uip/uip_icmpsend.c | 168 |
1 files changed, 168 insertions, 0 deletions
diff --git a/nuttx/net/uip/uip_icmpsend.c b/nuttx/net/uip/uip_icmpsend.c new file mode 100644 index 000000000..00c5bb9de --- /dev/null +++ b/nuttx/net/uip/uip_icmpsend.c @@ -0,0 +1,168 @@ +/**************************************************************************** + * net/uip/uip_icmpsend.c + * + * Copyright (C) 2008-2010, 2012 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_ICMP) && defined(CONFIG_NET_ICMP_PING) + +#include <debug.h> + +#include <nuttx/net/uip/uipopt.h> +#include <nuttx/net/uip/uip.h> +#include <nuttx/net/uip/uip-arch.h> + +#include "uip_internal.h" + +/**************************************************************************** + * Definitions + ****************************************************************************/ + +#define ICMPBUF ((struct uip_icmpip_hdr *)&dev->d_buf[UIP_LLH_LEN]) + +/**************************************************************************** + * Public Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Variables + ****************************************************************************/ + +/**************************************************************************** + * Private Functions + ****************************************************************************/ + +/**************************************************************************** + * Public Functions + ****************************************************************************/ + +/**************************************************************************** + * Name: uip_icmpsend + * + * Description: + * Setup to send an ICMP packet + * + * Parameters: + * dev - The device driver structure to use in the send operation + * + * Return: + * None + * + * Assumptions: + * Called from the interrupt level or with interrupts disabled. + * + ****************************************************************************/ + +void uip_icmpsend(struct uip_driver_s *dev, uip_ipaddr_t *destaddr) +{ + struct uip_icmpip_hdr *picmp = ICMPBUF; + + if (dev->d_sndlen > 0) + { + /* The total length to send is the size of the application data plus + * the IP and ICMP headers (and, eventually, the ethernet header) + */ + + dev->d_len = dev->d_sndlen + UIP_IPICMPH_LEN; + + /* The total size of the data (for ICMP checksum calculation) includes + * the size of the ICMP header + */ + + dev->d_sndlen += UIP_ICMPH_LEN; + + /* Initialize the IP header. Note that for IPv6, the IP length field + * does not include the IPv6 IP header length. + */ + +#ifdef CONFIG_NET_IPv6 + + picmp->vtc = 0x60; + picmp->tcf = 0x00; + picmp->flow = 0x00; + picmp->len[0] = (dev->d_sndlen >> 8); + picmp->len[1] = (dev->d_sndlen & 0xff); + picmp->nexthdr = UIP_PROTO_ICMP; + picmp->hoplimit = UIP_TTL; + + uip_ipaddr_copy(picmp->srcipaddr, &dev->d_ipaddr); + uip_ipaddr_copy(picmp->destipaddr, destaddr); + +#else /* CONFIG_NET_IPv6 */ + + picmp->vhl = 0x45; + picmp->tos = 0; + picmp->len[0] = (dev->d_len >> 8); + picmp->len[1] = (dev->d_len & 0xff); + ++g_ipid; + picmp->ipid[0] = g_ipid >> 8; + picmp->ipid[1] = g_ipid & 0xff; + picmp->ipoffset[0] = UIP_TCPFLAG_DONTFRAG >> 8; + picmp->ipoffset[1] = UIP_TCPFLAG_DONTFRAG & 0xff; + picmp->ttl = UIP_TTL; + picmp->proto = UIP_PROTO_ICMP; + + uiphdr_ipaddr_copy(picmp->srcipaddr, &dev->d_ipaddr); + uiphdr_ipaddr_copy(picmp->destipaddr, destaddr); + + /* Calculate IP checksum. */ + + picmp->ipchksum = 0; + picmp->ipchksum = ~(uip_ipchksum(dev)); + +#endif /* CONFIG_NET_IPv6 */ + + /* Calculate the ICMP checksum. */ + + picmp->icmpchksum = 0; + picmp->icmpchksum = ~(uip_icmpchksum(dev, dev->d_sndlen)); + if (picmp->icmpchksum == 0) + { + picmp->icmpchksum = 0xffff; + } + + nllvdbg("Outgoing ICMP packet length: %d (%d)\n", + dev->d_len, (picmp->len[0] << 8) | picmp->len[1]); + +#ifdef CONFIG_NET_STATISTICS + uip_stat.icmp.sent++; + uip_stat.ip.sent++; +#endif + } +} + +#endif /* CONFIG_NET && CONFIG_NET_ICMP && CONFIG_NET_ICMP_PING */ |