-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * Copyright 2014 6WIND S.A.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * 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.
- * * Neither the name of Intel Corporation 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.
- */
-
/*
- * Copyright (c) 1982, 1986, 1990, 1993
- * The Regents of the University of California. 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
+ * SPDX-License-Identifier: BSD-3-Clause
*
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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.
- *
- * @(#)in.h 8.3 (Berkeley) 1/3/94
- * $FreeBSD: src/sys/netinet/in.h,v 1.82 2003/10/25 09:37:10 ume Exp $
+ * Copyright(c) 1982, 1986, 1990, 1993
+ * The Regents of the University of California.
+ * Copyright(c) 2010-2014 Intel Corporation.
+ * Copyright(c) 2014 6WIND S.A.
+ * All rights reserved.
*/
#ifndef _RTE_IP_H_
#include <stdint.h>
#include <netinet/in.h>
-#include <rte_memcpy.h>
#include <rte_byteorder.h>
#include <rte_mbuf.h>
(((c) & 0xff) << 8) | \
((d) & 0xff))
+/** Maximal IPv4 packet length (including a header) */
+#define IPV4_MAX_PKT_LEN 65535
+
+/** Internet header length mask for version_ihl field */
+#define IPV4_HDR_IHL_MASK (0x0f)
+/**
+ * Internet header length field multiplier (IHL field specifies overall header
+ * length in number of 4-byte words)
+ */
+#define IPV4_IHL_MULTIPLIER (4)
+
/* Fragment Offset * Flags. */
#define IPV4_HDR_DF_SHIFT 14
#define IPV4_HDR_MF_SHIFT 13
((x) >= IPV4_MIN_MCAST && (x) <= IPV4_MAX_MCAST) /**< check if IPv4 address is multicast */
/**
- * Process the non-complemented checksum of a buffer.
+ * @internal Calculate a sum of all words in the buffer.
+ * Helper routine for the rte_raw_cksum().
*
* @param buf
* Pointer to the buffer.
* @param len
* Length of the buffer.
+ * @param sum
+ * Initial value of the sum.
* @return
- * The non-complemented checksum.
+ * sum += Sum of all words in the buffer.
*/
-static inline uint16_t
-rte_raw_cksum(const char *buf, size_t len)
+static inline uint32_t
+__rte_raw_cksum(const void *buf, size_t len, uint32_t sum)
{
- const uint16_t *u16 = (const uint16_t *)buf;
- uint32_t sum = 0;
+ /* workaround gcc strict-aliasing warning */
+ uintptr_t ptr = (uintptr_t)buf;
+ typedef uint16_t __attribute__((__may_alias__)) u16_p;
+ const u16_p *u16 = (const u16_p *)ptr;
while (len >= (sizeof(*u16) * 4)) {
sum += u16[0];
if (len == 1)
sum += *((const uint8_t *)u16);
+ return sum;
+}
+
+/**
+ * @internal Reduce a sum to the non-complemented checksum.
+ * Helper routine for the rte_raw_cksum().
+ *
+ * @param sum
+ * Value of the sum.
+ * @return
+ * The non-complemented checksum.
+ */
+static inline uint16_t
+__rte_raw_cksum_reduce(uint32_t sum)
+{
sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
sum = ((sum & 0xffff0000) >> 16) + (sum & 0xffff);
return (uint16_t)sum;
}
+/**
+ * Process the non-complemented checksum of a buffer.
+ *
+ * @param buf
+ * Pointer to the buffer.
+ * @param len
+ * Length of the buffer.
+ * @return
+ * The non-complemented checksum.
+ */
+static inline uint16_t
+rte_raw_cksum(const void *buf, size_t len)
+{
+ uint32_t sum;
+
+ sum = __rte_raw_cksum(buf, len, 0);
+ return __rte_raw_cksum_reduce(sum);
+}
+
+/**
+ * Compute the raw (non complemented) checksum of a packet.
+ *
+ * @param m
+ * The pointer to the mbuf.
+ * @param off
+ * The offset in bytes to start the checksum.
+ * @param len
+ * The length in bytes of the data to checksum.
+ * @param cksum
+ * A pointer to the checksum, filled on success.
+ * @return
+ * 0 on success, -1 on error (bad length or offset).
+ */
+static inline int
+rte_raw_cksum_mbuf(const struct rte_mbuf *m, uint32_t off, uint32_t len,
+ uint16_t *cksum)
+{
+ const struct rte_mbuf *seg;
+ const char *buf;
+ uint32_t sum, tmp;
+ uint32_t seglen, done;
+
+ /* easy case: all data in the first segment */
+ if (off + len <= rte_pktmbuf_data_len(m)) {
+ *cksum = rte_raw_cksum(rte_pktmbuf_mtod_offset(m,
+ const char *, off), len);
+ return 0;
+ }
+
+ if (unlikely(off + len > rte_pktmbuf_pkt_len(m)))
+ return -1; /* invalid params, return a dummy value */
+
+ /* else browse the segment to find offset */
+ seglen = 0;
+ for (seg = m; seg != NULL; seg = seg->next) {
+ seglen = rte_pktmbuf_data_len(seg);
+ if (off < seglen)
+ break;
+ off -= seglen;
+ }
+ seglen -= off;
+ buf = rte_pktmbuf_mtod_offset(seg, const char *, off);
+ if (seglen >= len) {
+ /* all in one segment */
+ *cksum = rte_raw_cksum(buf, len);
+ return 0;
+ }
+
+ /* hard case: process checksum of several segments */
+ sum = 0;
+ done = 0;
+ for (;;) {
+ tmp = __rte_raw_cksum(buf, seglen, 0);
+ if (done & 1)
+ tmp = rte_bswap16(tmp);
+ sum += tmp;
+ done += seglen;
+ if (done == len)
+ break;
+ seg = seg->next;
+ buf = rte_pktmbuf_mtod(seg, const char *);
+ seglen = rte_pktmbuf_data_len(seg);
+ if (seglen > len - done)
+ seglen = len - done;
+ }
+
+ *cksum = __rte_raw_cksum_reduce(sum);
+ return 0;
+}
+
/**
* Process the IPv4 checksum of an IPv4 header.
*
rte_ipv4_cksum(const struct ipv4_hdr *ipv4_hdr)
{
uint16_t cksum;
- cksum = rte_raw_cksum((const char *)ipv4_hdr, sizeof(struct ipv4_hdr));
- return ((cksum == 0xffff) ? cksum : ~cksum);
+ cksum = rte_raw_cksum(ipv4_hdr, sizeof(struct ipv4_hdr));
+ return (cksum == 0xffff) ? cksum : ~cksum;
}
/**
(uint16_t)(rte_be_to_cpu_16(ipv4_hdr->total_length)
- sizeof(struct ipv4_hdr)));
}
- return rte_raw_cksum((const char *)&psd_hdr, sizeof(psd_hdr));
+ return rte_raw_cksum(&psd_hdr, sizeof(psd_hdr));
}
/**
static inline uint16_t
rte_ipv6_phdr_cksum(const struct ipv6_hdr *ipv6_hdr, uint64_t ol_flags)
{
- struct ipv6_psd_header {
- uint8_t src_addr[16]; /* IP address of source host. */
- uint8_t dst_addr[16]; /* IP address of destination host. */
- uint32_t len; /* L4 length. */
- uint32_t proto; /* L4 protocol - top 3 bytes must be zero */
+ uint32_t sum;
+ struct {
+ uint32_t len; /* L4 length. */
+ uint32_t proto; /* L4 protocol - top 3 bytes must be zero */
} psd_hdr;
- rte_memcpy(&psd_hdr.src_addr, ipv6_hdr->src_addr,
- sizeof(ipv6_hdr->src_addr) + sizeof(ipv6_hdr->dst_addr));
psd_hdr.proto = (ipv6_hdr->proto << 24);
if (ol_flags & PKT_TX_TCP_SEG) {
psd_hdr.len = 0;
psd_hdr.len = ipv6_hdr->payload_len;
}
- return rte_raw_cksum((const char *)&psd_hdr, sizeof(psd_hdr));
+ sum = __rte_raw_cksum(ipv6_hdr->src_addr,
+ sizeof(ipv6_hdr->src_addr) + sizeof(ipv6_hdr->dst_addr),
+ 0);
+ sum = __rte_raw_cksum(&psd_hdr, sizeof(psd_hdr), sum);
+ return __rte_raw_cksum_reduce(sum);
}
/**
git.droids-corp.org / dpdk.git / blobdiff