X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_ip_frag%2Frte_ipv6_fragmentation.c;h=5d67336f2de398feb4ea3e8944dbfbc29b3b1553;hb=98ffdfbcf1ea8f4705fa3dacd6d9ae94d3705733;hp=e8f137cfc5b73a8e8176534615e883a710f9a7e9;hpb=0aa31d7a5929a95580f6a54765a618d2b2615f4b;p=dpdk.git diff --git a/lib/librte_ip_frag/rte_ipv6_fragmentation.c b/lib/librte_ip_frag/rte_ipv6_fragmentation.c index e8f137cfc5..5d67336f2d 100644 --- a/lib/librte_ip_frag/rte_ipv6_fragmentation.c +++ b/lib/librte_ip_frag/rte_ipv6_fragmentation.c @@ -1,45 +1,12 @@ -/*- - * BSD LICENSE - * - * Copyright(c) 2010-2014 Intel Corporation. All rights reserved. - * 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. +/* SPDX-License-Identifier: BSD-3-Clause + * Copyright(c) 2010-2014 Intel Corporation */ #include -#include #include -#include #include -#include -#include "rte_ip_frag.h" #include "ip_frag_common.h" /** @@ -50,15 +17,9 @@ * */ -/* Fragment Extension Header */ -#define IPV6_HDR_MF_SHIFT 0 -#define IPV6_HDR_FO_SHIFT 3 -#define IPV6_HDR_MF_MASK (1 << IPV6_HDR_MF_SHIFT) -#define IPV6_HDR_FO_MASK ((1 << IPV6_HDR_FO_SHIFT) - 1) - static inline void -__fill_ipv6hdr_frag(struct ipv6_hdr *dst, - const struct ipv6_hdr *src, uint16_t len, uint16_t fofs, +__fill_ipv6hdr_frag(struct rte_ipv6_hdr *dst, + const struct rte_ipv6_hdr *src, uint16_t len, uint16_t fofs, uint32_t mf) { struct ipv6_extension_fragment *fh; @@ -69,10 +30,8 @@ __fill_ipv6hdr_frag(struct ipv6_hdr *dst, fh = (struct ipv6_extension_fragment *) ++dst; fh->next_header = src->proto; - fh->reserved1 = 0; - fh->frag_offset = rte_cpu_to_be_16(fofs); - fh->reserved2 = 0; - fh->more_frags = rte_cpu_to_be_16(mf); + fh->reserved = 0; + fh->frag_data = rte_cpu_to_be_16(RTE_IPV6_SET_FRAG_DATA(fofs, mf)); fh->id = 0; } @@ -114,25 +73,39 @@ rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in, struct rte_mempool *pool_indirect) { struct rte_mbuf *in_seg = NULL; - struct ipv6_hdr *in_hdr; + struct rte_ipv6_hdr *in_hdr; uint32_t out_pkt_pos, in_seg_data_pos; uint32_t more_in_segs; uint16_t fragment_offset, frag_size; - - frag_size = (uint16_t)(mtu_size - sizeof(struct ipv6_hdr)); - - /* Fragment size should be a multiple of 8. */ - RTE_IP_FRAG_ASSERT((frag_size & IPV6_HDR_FO_MASK) == 0); + uint64_t frag_bytes_remaining; + + /* + * Formal parameter checking. + */ + if (unlikely(pkt_in == NULL) || unlikely(pkts_out == NULL) || + unlikely(nb_pkts_out == 0) || + unlikely(pool_direct == NULL) || unlikely(pool_indirect == NULL) || + unlikely(mtu_size < RTE_IPV6_MIN_MTU)) + return -EINVAL; + + /* + * Ensure the IP payload length of all fragments (except the + * the last fragment) are a multiple of 8 bytes per RFC2460. + */ + + frag_size = mtu_size - sizeof(struct rte_ipv6_hdr) - + sizeof(struct ipv6_extension_fragment); + frag_size = RTE_ALIGN_FLOOR(frag_size, RTE_IPV6_EHDR_FO_ALIGN); /* Check that pkts_out is big enough to hold all fragments */ if (unlikely (frag_size * nb_pkts_out < - (uint16_t)(pkt_in->pkt.pkt_len - sizeof (struct ipv6_hdr)))) - return (-EINVAL); + (uint16_t)(pkt_in->pkt_len - sizeof(struct rte_ipv6_hdr)))) + return -EINVAL; - in_hdr = (struct ipv6_hdr *) pkt_in->pkt.data; + in_hdr = rte_pktmbuf_mtod(pkt_in, struct rte_ipv6_hdr *); in_seg = pkt_in; - in_seg_data_pos = sizeof(struct ipv6_hdr); + in_seg_data_pos = sizeof(struct rte_ipv6_hdr); out_pkt_pos = 0; fragment_offset = 0; @@ -140,18 +113,21 @@ rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in, while (likely(more_in_segs)) { struct rte_mbuf *out_pkt = NULL, *out_seg_prev = NULL; uint32_t more_out_segs; - struct ipv6_hdr *out_hdr; + struct rte_ipv6_hdr *out_hdr; /* Allocate direct buffer */ out_pkt = rte_pktmbuf_alloc(pool_direct); if (unlikely(out_pkt == NULL)) { __free_fragments(pkts_out, out_pkt_pos); - return (-ENOMEM); + return -ENOMEM; } /* Reserve space for the IP header that will be built later */ - out_pkt->pkt.data_len = sizeof(struct ipv6_hdr) + sizeof(struct ipv6_extension_fragment); - out_pkt->pkt.pkt_len = sizeof(struct ipv6_hdr) + sizeof(struct ipv6_extension_fragment); + out_pkt->data_len = sizeof(struct rte_ipv6_hdr) + + sizeof(struct ipv6_extension_fragment); + out_pkt->pkt_len = sizeof(struct rte_ipv6_hdr) + + sizeof(struct ipv6_extension_fragment); + frag_bytes_remaining = frag_size; out_seg_prev = out_pkt; more_out_segs = 1; @@ -164,32 +140,32 @@ rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in, if (unlikely(out_seg == NULL)) { rte_pktmbuf_free(out_pkt); __free_fragments(pkts_out, out_pkt_pos); - return (-ENOMEM); + return -ENOMEM; } - out_seg_prev->pkt.next = out_seg; + out_seg_prev->next = out_seg; out_seg_prev = out_seg; /* Prepare indirect buffer */ rte_pktmbuf_attach(out_seg, in_seg); - len = mtu_size - out_pkt->pkt.pkt_len; - if (len > (in_seg->pkt.data_len - in_seg_data_pos)) { - len = in_seg->pkt.data_len - in_seg_data_pos; + len = frag_bytes_remaining; + if (len > (in_seg->data_len - in_seg_data_pos)) { + len = in_seg->data_len - in_seg_data_pos; } - out_seg->pkt.data = (char *) in_seg->pkt.data + (uint16_t) in_seg_data_pos; - out_seg->pkt.data_len = (uint16_t)len; - out_pkt->pkt.pkt_len = (uint16_t)(len + - out_pkt->pkt.pkt_len); - out_pkt->pkt.nb_segs += 1; + out_seg->data_off = in_seg->data_off + in_seg_data_pos; + out_seg->data_len = (uint16_t)len; + out_pkt->pkt_len = (uint16_t)(len + + out_pkt->pkt_len); + out_pkt->nb_segs += 1; in_seg_data_pos += len; + frag_bytes_remaining -= len; /* Current output packet (i.e. fragment) done ? */ - if (unlikely(out_pkt->pkt.pkt_len >= mtu_size)) { + if (unlikely(frag_bytes_remaining == 0)) more_out_segs = 0; - } /* Current input segment done ? */ - if (unlikely(in_seg_data_pos == in_seg->pkt.data_len)) { - in_seg = in_seg->pkt.next; + if (unlikely(in_seg_data_pos == in_seg->data_len)) { + in_seg = in_seg->next; in_seg_data_pos = 0; if (unlikely(in_seg == NULL)) { @@ -200,14 +176,14 @@ rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in, /* Build the IP header */ - out_hdr = (struct ipv6_hdr *) out_pkt->pkt.data; + out_hdr = rte_pktmbuf_mtod(out_pkt, struct rte_ipv6_hdr *); __fill_ipv6hdr_frag(out_hdr, in_hdr, - (uint16_t) out_pkt->pkt.pkt_len - sizeof(struct ipv6_hdr), + (uint16_t) out_pkt->pkt_len - sizeof(struct rte_ipv6_hdr), fragment_offset, more_in_segs); fragment_offset = (uint16_t)(fragment_offset + - out_pkt->pkt.pkt_len - sizeof(struct ipv6_hdr) + out_pkt->pkt_len - sizeof(struct rte_ipv6_hdr) - sizeof(struct ipv6_extension_fragment)); /* Write the fragment to the output list */ @@ -215,5 +191,5 @@ rte_ipv6_fragment_packet(struct rte_mbuf *pkt_in, out_pkt_pos ++; } - return (out_pkt_pos); + return out_pkt_pos; }