diff options
Diffstat (limited to 'nuttx/net/uip/uip_chksum.c')
| -rw-r--r-- | nuttx/net/uip/uip_chksum.c | 230 |
1 files changed, 0 insertions, 230 deletions
diff --git a/nuttx/net/uip/uip_chksum.c b/nuttx/net/uip/uip_chksum.c deleted file mode 100644 index 7a4eee790..000000000 --- a/nuttx/net/uip/uip_chksum.c +++ /dev/null @@ -1,230 +0,0 @@ -/**************************************************************************** - * net/uip/uip_chksum.c - * - * Copyright (C) 2007-2010, 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> -#ifdef CONFIG_NET - -#include <stdint.h> -#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" - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -#define BUF ((struct uip_ip_hdr *)&dev->d_buf[UIP_LLH_LEN]) -#define ICMPBUF ((struct uip_icmpip_hdr *)&dev->d_buf[UIP_LLH_LEN]) - -/**************************************************************************** - * Private Data - ****************************************************************************/ - -/**************************************************************************** - * Private Functions - ****************************************************************************/ - -#if !UIP_ARCH_CHKSUM -static uint16_t chksum(uint16_t sum, const uint8_t *data, uint16_t len) -{ - uint16_t t; - const uint8_t *dataptr; - const uint8_t *last_byte; - - dataptr = data; - last_byte = data + len - 1; - - while(dataptr < last_byte) - { - /* At least two more bytes */ - - t = (dataptr[0] << 8) + dataptr[1]; - sum += t; - if (sum < t) - { - sum++; /* carry */ - } - dataptr += 2; - } - - if (dataptr == last_byte) - { - t = (dataptr[0] << 8) + 0; - sum += t; - if (sum < t) - { - sum++; /* carry */ - } - } - - /* Return sum in host byte order. */ - - return sum; -} - -static uint16_t upper_layer_chksum(struct uip_driver_s *dev, uint8_t proto) -{ - struct uip_ip_hdr *pbuf = BUF; - uint16_t upper_layer_len; - uint16_t sum; - -#ifdef CONFIG_NET_IPv6 - upper_layer_len = (((uint16_t)(pbuf->len[0]) << 8) + pbuf->len[1]); -#else /* CONFIG_NET_IPv6 */ - upper_layer_len = (((uint16_t)(pbuf->len[0]) << 8) + pbuf->len[1]) - UIP_IPH_LEN; -#endif /* CONFIG_NET_IPv6 */ - - /* First sum pseudoheader. */ - - /* IP protocol and length fields. This addition cannot carry. */ - - sum = upper_layer_len + proto; - - /* Sum IP source and destination addresses. */ - - sum = chksum(sum, (uint8_t *)&pbuf->srcipaddr, 2 * sizeof(uip_ipaddr_t)); - - /* Sum TCP header and data. */ - - sum = chksum(sum, &dev->d_buf[UIP_IPH_LEN + UIP_LLH_LEN], upper_layer_len); - - return (sum == 0) ? 0xffff : htons(sum); -} - -#ifdef CONFIG_NET_IPv6 -static uint16_t uip_icmp6chksum(struct uip_driver_s *dev) -{ - return upper_layer_chksum(dev, UIP_PROTO_ICMP6); -} -#endif /* CONFIG_NET_IPv6 */ - -#endif /* UIP_ARCH_CHKSUM */ - -/**************************************************************************** - * Public Functions - ****************************************************************************/ - -/* Calculate the Internet checksum over a buffer. */ - -#if !UIP_ARCH_ADD32 -static inline void uip_carry32(uint8_t *sum, uint16_t op16) -{ - if (sum[2] < (op16 >> 8)) - { - ++sum[1]; - if (sum[1] == 0) - { - ++sum[0]; - } - } - - if (sum[3] < (op16 & 0xff)) - { - ++sum[2]; - if (sum[2] == 0) - { - ++sum[1]; - if (sum[1] == 0) - { - ++sum[0]; - } - } - } -} - -void uip_incr32(uint8_t *op32, uint16_t op16) -{ - op32[3] += (op16 & 0xff); - op32[2] += (op16 >> 8); - uip_carry32(op32, op16); -} - -#endif /* UIP_ARCH_ADD32 */ - -#if !UIP_ARCH_CHKSUM -uint16_t uip_chksum(uint16_t *data, uint16_t len) -{ - return htons(chksum(0, (uint8_t *)data, len)); -} - -/* Calculate the IP header checksum of the packet header in d_buf. */ - -#ifndef UIP_ARCH_IPCHKSUM -uint16_t uip_ipchksum(struct uip_driver_s *dev) -{ - uint16_t sum; - - sum = chksum(0, &dev->d_buf[UIP_LLH_LEN], UIP_IPH_LEN); - return (sum == 0) ? 0xffff : htons(sum); -} -#endif - -/* Calculate the TCP checksum of the packet in d_buf and d_appdata. */ - -uint16_t uip_tcpchksum(struct uip_driver_s *dev) -{ - return upper_layer_chksum(dev, UIP_PROTO_TCP); -} - -/* Calculate the UDP checksum of the packet in d_buf and d_appdata. */ - -#ifdef CONFIG_NET_UDP_CHECKSUMS -uint16_t uip_udpchksum(struct uip_driver_s *dev) -{ - return upper_layer_chksum(dev, UIP_PROTO_UDP); -} -#endif - -/* Calculate the checksum of the ICMP message */ - -#if defined(CONFIG_NET_ICMP) && defined(CONFIG_NET_ICMP_PING) -uint16_t uip_icmpchksum(struct uip_driver_s *dev, int len) -{ - struct uip_icmpip_hdr *picmp = ICMPBUF; - return uip_chksum((uint16_t*)&picmp->type, len); -} -#endif - -#endif /* UIP_ARCH_CHKSUM */ - -#endif /* CONFIG_NET */ |