6307b909b8
Remove extra parenthesis from return statements. Signed-off-by: Ferruh Yigit <ferruhy@gmail.com>
413 lines
12 KiB
C
413 lines
12 KiB
C
/*-
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* BSD LICENSE
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*
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* Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
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* Copyright 2014 6WIND S.A.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)in.h 8.3 (Berkeley) 1/3/94
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* $FreeBSD: src/sys/netinet/in.h,v 1.82 2003/10/25 09:37:10 ume Exp $
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*/
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#ifndef _RTE_IP_H_
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#define _RTE_IP_H_
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/**
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* @file
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*
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* IP-related defines
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*/
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#include <stdint.h>
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#include <netinet/in.h>
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#include <rte_byteorder.h>
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#include <rte_mbuf.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/**
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* IPv4 Header
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*/
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struct ipv4_hdr {
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uint8_t version_ihl; /**< version and header length */
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uint8_t type_of_service; /**< type of service */
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uint16_t total_length; /**< length of packet */
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uint16_t packet_id; /**< packet ID */
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uint16_t fragment_offset; /**< fragmentation offset */
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uint8_t time_to_live; /**< time to live */
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uint8_t next_proto_id; /**< protocol ID */
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uint16_t hdr_checksum; /**< header checksum */
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uint32_t src_addr; /**< source address */
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uint32_t dst_addr; /**< destination address */
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} __attribute__((__packed__));
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/** Create IPv4 address */
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#define IPv4(a,b,c,d) ((uint32_t)(((a) & 0xff) << 24) | \
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(((b) & 0xff) << 16) | \
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(((c) & 0xff) << 8) | \
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((d) & 0xff))
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/** Maximal IPv4 packet length (including a header) */
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#define IPV4_MAX_PKT_LEN 65535
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/** Internet header length mask for version_ihl field */
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#define IPV4_HDR_IHL_MASK (0x0f)
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/**
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* Internet header length field multiplier (IHL field specifies overall header
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* length in number of 4-byte words)
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*/
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#define IPV4_IHL_MULTIPLIER (4)
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/* Fragment Offset * Flags. */
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#define IPV4_HDR_DF_SHIFT 14
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#define IPV4_HDR_MF_SHIFT 13
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#define IPV4_HDR_FO_SHIFT 3
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#define IPV4_HDR_DF_FLAG (1 << IPV4_HDR_DF_SHIFT)
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#define IPV4_HDR_MF_FLAG (1 << IPV4_HDR_MF_SHIFT)
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#define IPV4_HDR_OFFSET_MASK ((1 << IPV4_HDR_MF_SHIFT) - 1)
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#define IPV4_HDR_OFFSET_UNITS 8
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/*
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* IPv4 address types
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*/
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#define IPV4_ANY ((uint32_t)0x00000000) /**< 0.0.0.0 */
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#define IPV4_LOOPBACK ((uint32_t)0x7f000001) /**< 127.0.0.1 */
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#define IPV4_BROADCAST ((uint32_t)0xe0000000) /**< 224.0.0.0 */
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#define IPV4_ALLHOSTS_GROUP ((uint32_t)0xe0000001) /**< 224.0.0.1 */
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#define IPV4_ALLRTRS_GROUP ((uint32_t)0xe0000002) /**< 224.0.0.2 */
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#define IPV4_MAX_LOCAL_GROUP ((uint32_t)0xe00000ff) /**< 224.0.0.255 */
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/*
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* IPv4 Multicast-related macros
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*/
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#define IPV4_MIN_MCAST IPv4(224, 0, 0, 0) /**< Minimal IPv4-multicast address */
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#define IPV4_MAX_MCAST IPv4(239, 255, 255, 255) /**< Maximum IPv4 multicast address */
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#define IS_IPV4_MCAST(x) \
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((x) >= IPV4_MIN_MCAST && (x) <= IPV4_MAX_MCAST) /**< check if IPv4 address is multicast */
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/**
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* @internal Calculate a sum of all words in the buffer.
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* Helper routine for the rte_raw_cksum().
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*
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* @param buf
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* Pointer to the buffer.
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* @param len
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* Length of the buffer.
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* @param sum
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* Initial value of the sum.
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* @return
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* sum += Sum of all words in the buffer.
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*/
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static inline uint32_t
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__rte_raw_cksum(const void *buf, size_t len, uint32_t sum)
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{
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/* workaround gcc strict-aliasing warning */
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uintptr_t ptr = (uintptr_t)buf;
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const uint16_t *u16 = (const uint16_t *)ptr;
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while (len >= (sizeof(*u16) * 4)) {
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sum += u16[0];
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sum += u16[1];
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sum += u16[2];
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sum += u16[3];
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len -= sizeof(*u16) * 4;
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u16 += 4;
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}
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while (len >= sizeof(*u16)) {
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sum += *u16;
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len -= sizeof(*u16);
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u16 += 1;
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}
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/* if length is in odd bytes */
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if (len == 1)
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sum += *((const uint8_t *)u16);
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return sum;
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}
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/**
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* @internal Reduce a sum to the non-complemented checksum.
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* Helper routine for the rte_raw_cksum().
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*
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* @param sum
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* Value of the sum.
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* @return
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* The non-complemented checksum.
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*/
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static inline uint16_t
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__rte_raw_cksum_reduce(uint32_t sum)
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{
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sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
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sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
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return (uint16_t)sum;
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}
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/**
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* Process the non-complemented checksum of a buffer.
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*
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* @param buf
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* Pointer to the buffer.
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* @param len
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* Length of the buffer.
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* @return
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* The non-complemented checksum.
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*/
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static inline uint16_t
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rte_raw_cksum(const void *buf, size_t len)
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{
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uint32_t sum;
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sum = __rte_raw_cksum(buf, len, 0);
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return __rte_raw_cksum_reduce(sum);
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}
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/**
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* Process the IPv4 checksum of an IPv4 header.
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*
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* The checksum field must be set to 0 by the caller.
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*
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* @param ipv4_hdr
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* The pointer to the contiguous IPv4 header.
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* @return
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* The complemented checksum to set in the IP packet.
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*/
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static inline uint16_t
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rte_ipv4_cksum(const struct ipv4_hdr *ipv4_hdr)
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{
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uint16_t cksum;
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cksum = rte_raw_cksum(ipv4_hdr, sizeof(struct ipv4_hdr));
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return (cksum == 0xffff) ? cksum : ~cksum;
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}
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/**
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* Process the pseudo-header checksum of an IPv4 header.
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*
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* The checksum field must be set to 0 by the caller.
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*
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* Depending on the ol_flags, the pseudo-header checksum expected by the
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* drivers is not the same. For instance, when TSO is enabled, the IP
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* payload length must not be included in the packet.
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*
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* When ol_flags is 0, it computes the standard pseudo-header checksum.
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*
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* @param ipv4_hdr
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* The pointer to the contiguous IPv4 header.
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* @param ol_flags
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* The ol_flags of the associated mbuf.
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* @return
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* The non-complemented checksum to set in the L4 header.
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*/
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static inline uint16_t
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rte_ipv4_phdr_cksum(const struct ipv4_hdr *ipv4_hdr, uint64_t ol_flags)
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{
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struct ipv4_psd_header {
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uint32_t src_addr; /* IP address of source host. */
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uint32_t dst_addr; /* IP address of destination host. */
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uint8_t zero; /* zero. */
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uint8_t proto; /* L4 protocol type. */
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uint16_t len; /* L4 length. */
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} psd_hdr;
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psd_hdr.src_addr = ipv4_hdr->src_addr;
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psd_hdr.dst_addr = ipv4_hdr->dst_addr;
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psd_hdr.zero = 0;
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psd_hdr.proto = ipv4_hdr->next_proto_id;
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if (ol_flags & PKT_TX_TCP_SEG) {
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psd_hdr.len = 0;
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} else {
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psd_hdr.len = rte_cpu_to_be_16(
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(uint16_t)(rte_be_to_cpu_16(ipv4_hdr->total_length)
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- sizeof(struct ipv4_hdr)));
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}
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return rte_raw_cksum(&psd_hdr, sizeof(psd_hdr));
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}
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/**
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* Process the IPv4 UDP or TCP checksum.
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*
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* The IPv4 header should not contains options. The IP and layer 4
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* checksum must be set to 0 in the packet by the caller.
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*
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* @param ipv4_hdr
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* The pointer to the contiguous IPv4 header.
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* @param l4_hdr
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* The pointer to the beginning of the L4 header.
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* @return
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* The complemented checksum to set in the IP packet.
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*/
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static inline uint16_t
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rte_ipv4_udptcp_cksum(const struct ipv4_hdr *ipv4_hdr, const void *l4_hdr)
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{
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uint32_t cksum;
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uint32_t l4_len;
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l4_len = rte_be_to_cpu_16(ipv4_hdr->total_length) -
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sizeof(struct ipv4_hdr);
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cksum = rte_raw_cksum(l4_hdr, l4_len);
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cksum += rte_ipv4_phdr_cksum(ipv4_hdr, 0);
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cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
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cksum = (~cksum) & 0xffff;
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if (cksum == 0)
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cksum = 0xffff;
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return cksum;
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}
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/**
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* IPv6 Header
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*/
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struct ipv6_hdr {
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uint32_t vtc_flow; /**< IP version, traffic class & flow label. */
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uint16_t payload_len; /**< IP packet length - includes sizeof(ip_header). */
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uint8_t proto; /**< Protocol, next header. */
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uint8_t hop_limits; /**< Hop limits. */
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uint8_t src_addr[16]; /**< IP address of source host. */
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uint8_t dst_addr[16]; /**< IP address of destination host(s). */
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} __attribute__((__packed__));
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/**
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* Process the pseudo-header checksum of an IPv6 header.
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*
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* Depending on the ol_flags, the pseudo-header checksum expected by the
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* drivers is not the same. For instance, when TSO is enabled, the IPv6
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* payload length must not be included in the packet.
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*
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* When ol_flags is 0, it computes the standard pseudo-header checksum.
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*
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* @param ipv6_hdr
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* The pointer to the contiguous IPv6 header.
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* @param ol_flags
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* The ol_flags of the associated mbuf.
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* @return
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* The non-complemented checksum to set in the L4 header.
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*/
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static inline uint16_t
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rte_ipv6_phdr_cksum(const struct ipv6_hdr *ipv6_hdr, uint64_t ol_flags)
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{
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uint32_t sum;
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struct {
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uint32_t len; /* L4 length. */
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uint32_t proto; /* L4 protocol - top 3 bytes must be zero */
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} psd_hdr;
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psd_hdr.proto = (ipv6_hdr->proto << 24);
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if (ol_flags & PKT_TX_TCP_SEG) {
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psd_hdr.len = 0;
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} else {
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psd_hdr.len = ipv6_hdr->payload_len;
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}
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sum = __rte_raw_cksum(ipv6_hdr->src_addr,
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sizeof(ipv6_hdr->src_addr) + sizeof(ipv6_hdr->dst_addr),
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0);
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sum = __rte_raw_cksum(&psd_hdr, sizeof(psd_hdr), sum);
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return __rte_raw_cksum_reduce(sum);
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}
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/**
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* Process the IPv6 UDP or TCP checksum.
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*
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* The IPv4 header should not contains options. The layer 4 checksum
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* must be set to 0 in the packet by the caller.
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*
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* @param ipv6_hdr
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* The pointer to the contiguous IPv6 header.
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* @param l4_hdr
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* The pointer to the beginning of the L4 header.
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* @return
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* The complemented checksum to set in the IP packet.
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*/
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static inline uint16_t
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rte_ipv6_udptcp_cksum(const struct ipv6_hdr *ipv6_hdr, const void *l4_hdr)
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{
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uint32_t cksum;
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uint32_t l4_len;
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l4_len = rte_be_to_cpu_16(ipv6_hdr->payload_len);
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cksum = rte_raw_cksum(l4_hdr, l4_len);
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cksum += rte_ipv6_phdr_cksum(ipv6_hdr, 0);
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cksum = ((cksum & 0xffff0000) >> 16) + (cksum & 0xffff);
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cksum = (~cksum) & 0xffff;
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if (cksum == 0)
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cksum = 0xffff;
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return cksum;
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}
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RTE_IP_H_ */
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