X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;ds=sidebyside;f=lib%2Flibrte_ip_frag%2Frte_ipv4_fragmentation.c;h=a96fb03e4ce60c1d15d0b8038c16f66239bc0cb8;hb=a753e53d517b4534573549300b610e3949f65914;hp=46ed5837a8904f14e6425309f8d26700d8cf67e5;hpb=e87f24024d71b160cf8f7a8536627636c02d4244;p=dpdk.git diff --git a/lib/librte_ip_frag/rte_ipv4_fragmentation.c b/lib/librte_ip_frag/rte_ipv4_fragmentation.c index 46ed5837a8..a96fb03e4c 100644 --- a/lib/librte_ip_frag/rte_ipv4_fragmentation.c +++ b/lib/librte_ip_frag/rte_ipv4_fragmentation.c @@ -1,55 +1,16 @@ -/*- - * 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 -#include -#include -#include "rte_ip_frag.h" #include "ip_frag_common.h" -/* - * MAX number of fragments per packet allowed. - */ -#define IPV4_MAX_FRAGS_PER_PACKET 0x80 - /* Fragment Offset */ #define IPV4_HDR_DF_SHIFT 14 #define IPV4_HDR_MF_SHIFT 13 @@ -58,7 +19,7 @@ #define IPV4_HDR_DF_MASK (1 << IPV4_HDR_DF_SHIFT) #define IPV4_HDR_MF_MASK (1 << IPV4_HDR_MF_SHIFT) -#define IPV4_HDR_FO_MASK ((1 << IPV4_HDR_FO_SHIFT) - 1) +#define IPV4_HDR_FO_ALIGN (1 << IPV4_HDR_FO_SHIFT) static inline void __fill_ipv4hdr_frag(struct ipv4_hdr *dst, const struct ipv4_hdr *src, uint16_t len, uint16_t fofs, @@ -101,7 +62,7 @@ static inline void __free_fragments(struct rte_mbuf *mb[], uint32_t num) * Otherwise - (-1) * . */ int32_t -rte_ipv4_fragmentation(struct rte_mbuf *pkt_in, +rte_ipv4_fragment_packet(struct rte_mbuf *pkt_in, struct rte_mbuf **pkts_out, uint16_t nb_pkts_out, uint16_t mtu_size, @@ -113,17 +74,16 @@ rte_ipv4_fragmentation(struct rte_mbuf *pkt_in, uint32_t out_pkt_pos, in_seg_data_pos; uint32_t more_in_segs; uint16_t fragment_offset, flag_offset, frag_size; + uint16_t frag_bytes_remaining; - frag_size = (uint16_t)(mtu_size - sizeof(struct ipv4_hdr)); - - /* Fragment size should be a multiply of 8. */ - RTE_IP_FRAG_ASSERT((frag_size & IPV4_HDR_FO_MASK) == 0); - - /* Fragment size should be a multiply of 8. */ - RTE_IP_FRAG_ASSERT(IPV4_MAX_FRAGS_PER_PACKET * frag_size >= - (uint16_t)(pkt_in->pkt.pkt_len - sizeof(struct ipv4_hdr))); + /* + * Ensure the IP payload length of all fragments is aligned to a + * multiple of 8 bytes as per RFC791 section 2.3. + */ + frag_size = RTE_ALIGN_FLOOR((mtu_size - sizeof(struct ipv4_hdr)), + IPV4_HDR_FO_ALIGN); - in_hdr = (struct ipv4_hdr *) pkt_in->pkt.data; + in_hdr = rte_pktmbuf_mtod(pkt_in, struct ipv4_hdr *); flag_offset = rte_cpu_to_be_16(in_hdr->fragment_offset); /* If Don't Fragment flag is set */ @@ -132,7 +92,7 @@ rte_ipv4_fragmentation(struct rte_mbuf *pkt_in, /* 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 ipv4_hdr)))) + (uint16_t)(pkt_in->pkt_len - sizeof (struct ipv4_hdr)))) return -EINVAL; in_seg = pkt_in; @@ -154,8 +114,9 @@ rte_ipv4_fragmentation(struct rte_mbuf *pkt_in, } /* Reserve space for the IP header that will be built later */ - out_pkt->pkt.data_len = sizeof(struct ipv4_hdr); - out_pkt->pkt.pkt_len = sizeof(struct ipv4_hdr); + out_pkt->data_len = sizeof(struct ipv4_hdr); + out_pkt->pkt_len = sizeof(struct ipv4_hdr); + frag_bytes_remaining = frag_size; out_seg_prev = out_pkt; more_out_segs = 1; @@ -170,29 +131,30 @@ rte_ipv4_fragmentation(struct rte_mbuf *pkt_in, __free_fragments(pkts_out, out_pkt_pos); 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)) @@ -202,17 +164,17 @@ rte_ipv4_fragmentation(struct rte_mbuf *pkt_in, /* Build the IP header */ - out_hdr = (struct ipv4_hdr*) out_pkt->pkt.data; + out_hdr = rte_pktmbuf_mtod(out_pkt, struct ipv4_hdr *); __fill_ipv4hdr_frag(out_hdr, in_hdr, - (uint16_t)out_pkt->pkt.pkt_len, + (uint16_t)out_pkt->pkt_len, flag_offset, fragment_offset, more_in_segs); fragment_offset = (uint16_t)(fragment_offset + - out_pkt->pkt.pkt_len - sizeof(struct ipv4_hdr)); + out_pkt->pkt_len - sizeof(struct ipv4_hdr)); out_pkt->ol_flags |= PKT_TX_IP_CKSUM; - out_pkt->pkt.vlan_macip.f.l3_len = sizeof(struct ipv4_hdr); + out_pkt->l3_len = sizeof(struct ipv4_hdr); /* Write the fragment to the output list */ pkts_out[out_pkt_pos] = out_pkt;