ceph/src/seastar/dpdk/test/test/packet_burst_generator.c

   1 /*-
   2  *   BSD LICENSE
   3  *
   4  *   Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
   5  *   All rights reserved.
   6  *
   7  *   Redistribution and use in source and binary forms, with or without
   8  *   modification, are permitted provided that the following conditions
   9  *   are met:
  10  *
  11  *     * Redistributions of source code must retain the above copyright
  12  *       notice, this list of conditions and the following disclaimer.
  13  *     * Redistributions in binary form must reproduce the above copyright
  14  *       notice, this list of conditions and the following disclaimer in
  15  *       the documentation and/or other materials provided with the
  16  *       distribution.
  17  *     * Neither the name of Intel Corporation nor the names of its
  18  *       contributors may be used to endorse or promote products derived
  19  *       from this software without specific prior written permission.
  20  *
  21  *   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  22  *   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  23  *   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  24  *   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  25  *   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  26  *   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  27  *   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  *   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  *   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  *   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  31  *   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <rte_byteorder.h>
  35 #include <rte_mbuf.h>
  36
  37 #include "packet_burst_generator.h"
  38
  39 #define UDP_SRC_PORT 1024
  40 #define UDP_DST_PORT 1024
  41
  42
  43 #define IP_DEFTTL  64   /* from RFC 1340. */
  44 #define IP_VERSION 0x40
  45 #define IP_HDRLEN  0x05 /* default IP header length == five 32-bits words. */
  46 #define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
  47
  48 static void
  49 copy_buf_to_pkt_segs(void *buf, unsigned len, struct rte_mbuf *pkt,
  50                 unsigned offset)
  51 {
  52         struct rte_mbuf *seg;
  53         void *seg_buf;
  54         unsigned copy_len;
  55
  56         seg = pkt;
  57         while (offset >= seg->data_len) {
  58                 offset -= seg->data_len;
  59                 seg = seg->next;
  60         }
  61         copy_len = seg->data_len - offset;
  62         seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset);
  63         while (len > copy_len) {
  64                 rte_memcpy(seg_buf, buf, (size_t) copy_len);
  65                 len -= copy_len;
  66                 buf = ((char *) buf + copy_len);
  67                 seg = seg->next;
  68                 seg_buf = rte_pktmbuf_mtod(seg, void *);
  69         }
  70         rte_memcpy(seg_buf, buf, (size_t) len);
  71 }
  72
  73 static inline void
  74 copy_buf_to_pkt(void *buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
  75 {
  76         if (offset + len <= pkt->data_len) {
  77                 rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset), buf,
  78                            (size_t) len);
  79                 return;
  80         }
  81         copy_buf_to_pkt_segs(buf, len, pkt, offset);
  82 }
  83
  84 void
  85 initialize_eth_header(struct ether_hdr *eth_hdr, struct ether_addr *src_mac,
  86                 struct ether_addr *dst_mac, uint16_t ether_type,
  87                 uint8_t vlan_enabled, uint16_t van_id)
  88 {
  89         ether_addr_copy(dst_mac, &eth_hdr->d_addr);
  90         ether_addr_copy(src_mac, &eth_hdr->s_addr);
  91
  92         if (vlan_enabled) {
  93                 struct vlan_hdr *vhdr = (struct vlan_hdr *)((uint8_t *)eth_hdr +
  94                                 sizeof(struct ether_hdr));
  95
  96                 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
  97
  98                 vhdr->eth_proto =  rte_cpu_to_be_16(ether_type);
  99                 vhdr->vlan_tci = van_id;
 100         } else {
 101                 eth_hdr->ether_type = rte_cpu_to_be_16(ether_type);
 102         }
 103 }
 104
 105 void
 106 initialize_arp_header(struct arp_hdr *arp_hdr, struct ether_addr *src_mac,
 107                 struct ether_addr *dst_mac, uint32_t src_ip, uint32_t dst_ip,
 108                 uint32_t opcode)
 109 {
 110         arp_hdr->arp_hrd = rte_cpu_to_be_16(ARP_HRD_ETHER);
 111         arp_hdr->arp_pro = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
 112         arp_hdr->arp_hln = ETHER_ADDR_LEN;
 113         arp_hdr->arp_pln = sizeof(uint32_t);
 114         arp_hdr->arp_op = rte_cpu_to_be_16(opcode);
 115         ether_addr_copy(src_mac, &arp_hdr->arp_data.arp_sha);
 116         arp_hdr->arp_data.arp_sip = src_ip;
 117         ether_addr_copy(dst_mac, &arp_hdr->arp_data.arp_tha);
 118         arp_hdr->arp_data.arp_tip = dst_ip;
 119 }
 120
 121 uint16_t
 122 initialize_udp_header(struct udp_hdr *udp_hdr, uint16_t src_port,
 123                 uint16_t dst_port, uint16_t pkt_data_len)
 124 {
 125         uint16_t pkt_len;
 126
 127         pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
 128
 129         udp_hdr->src_port = rte_cpu_to_be_16(src_port);
 130         udp_hdr->dst_port = rte_cpu_to_be_16(dst_port);
 131         udp_hdr->dgram_len = rte_cpu_to_be_16(pkt_len);
 132         udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
 133
 134         return pkt_len;
 135 }
 136
 137
 138 uint16_t
 139 initialize_ipv6_header(struct ipv6_hdr *ip_hdr, uint8_t *src_addr,
 140                 uint8_t *dst_addr, uint16_t pkt_data_len)
 141 {
 142         ip_hdr->vtc_flow = 0;
 143         ip_hdr->payload_len = pkt_data_len;
 144         ip_hdr->proto = IPPROTO_UDP;
 145         ip_hdr->hop_limits = IP_DEFTTL;
 146
 147         rte_memcpy(ip_hdr->src_addr, src_addr, sizeof(ip_hdr->src_addr));
 148         rte_memcpy(ip_hdr->dst_addr, dst_addr, sizeof(ip_hdr->dst_addr));
 149
 150         return (uint16_t) (pkt_data_len + sizeof(struct ipv6_hdr));
 151 }
 152
 153 uint16_t
 154 initialize_ipv4_header(struct ipv4_hdr *ip_hdr, uint32_t src_addr,
 155                 uint32_t dst_addr, uint16_t pkt_data_len)
 156 {
 157         uint16_t pkt_len;
 158         unaligned_uint16_t *ptr16;
 159         uint32_t ip_cksum;
 160
 161         /*
 162          * Initialize IP header.
 163          */
 164         pkt_len = (uint16_t) (pkt_data_len + sizeof(struct ipv4_hdr));
 165
 166         ip_hdr->version_ihl   = IP_VHL_DEF;
 167         ip_hdr->type_of_service   = 0;
 168         ip_hdr->fragment_offset = 0;
 169         ip_hdr->time_to_live   = IP_DEFTTL;
 170         ip_hdr->next_proto_id = IPPROTO_UDP;
 171         ip_hdr->packet_id = 0;
 172         ip_hdr->total_length   = rte_cpu_to_be_16(pkt_len);
 173         ip_hdr->src_addr = rte_cpu_to_be_32(src_addr);
 174         ip_hdr->dst_addr = rte_cpu_to_be_32(dst_addr);
 175
 176         /*
 177          * Compute IP header checksum.
 178          */
 179         ptr16 = (unaligned_uint16_t *)ip_hdr;
 180         ip_cksum = 0;
 181         ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
 182         ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
 183         ip_cksum += ptr16[4];
 184         ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
 185         ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
 186
 187         /*
 188          * Reduce 32 bit checksum to 16 bits and complement it.
 189          */
 190         ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
 191                 (ip_cksum & 0x0000FFFF);
 192         ip_cksum %= 65536;
 193         ip_cksum = (~ip_cksum) & 0x0000FFFF;
 194         if (ip_cksum == 0)
 195                 ip_cksum = 0xFFFF;
 196         ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
 197
 198         return pkt_len;
 199 }
 200
 201
 202
 203 /*
 204  * The maximum number of segments per packet is used when creating
 205  * scattered transmit packets composed of a list of mbufs.
 206  */
 207 #define RTE_MAX_SEGS_PER_PKT 255 /**< pkt.nb_segs is a 8-bit unsigned char. */
 208
 209
 210 int
 211 generate_packet_burst(struct rte_mempool *mp, struct rte_mbuf **pkts_burst,
 212                 struct ether_hdr *eth_hdr, uint8_t vlan_enabled, void *ip_hdr,
 213                 uint8_t ipv4, struct udp_hdr *udp_hdr, int nb_pkt_per_burst,
 214                 uint8_t pkt_len, uint8_t nb_pkt_segs)
 215 {
 216         int i, nb_pkt = 0;
 217         size_t eth_hdr_size;
 218
 219         struct rte_mbuf *pkt_seg;
 220         struct rte_mbuf *pkt;
 221
 222         for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
 223                 pkt = rte_pktmbuf_alloc(mp);
 224                 if (pkt == NULL) {
 225 nomore_mbuf:
 226                         if (nb_pkt == 0)
 227                                 return -1;
 228                         break;
 229                 }
 230
 231                 pkt->data_len = pkt_len;
 232                 pkt_seg = pkt;
 233                 for (i = 1; i < nb_pkt_segs; i++) {
 234                         pkt_seg->next = rte_pktmbuf_alloc(mp);
 235                         if (pkt_seg->next == NULL) {
 236                                 pkt->nb_segs = i;
 237                                 rte_pktmbuf_free(pkt);
 238                                 goto nomore_mbuf;
 239                         }
 240                         pkt_seg = pkt_seg->next;
 241                         pkt_seg->data_len = pkt_len;
 242                 }
 243                 pkt_seg->next = NULL; /* Last segment of packet. */
 244
 245                 /*
 246                  * Copy headers in first packet segment(s).
 247                  */
 248                 if (vlan_enabled)
 249                         eth_hdr_size = sizeof(struct ether_hdr) + sizeof(struct vlan_hdr);
 250                 else
 251                         eth_hdr_size = sizeof(struct ether_hdr);
 252
 253                 copy_buf_to_pkt(eth_hdr, eth_hdr_size, pkt, 0);
 254
 255                 if (ipv4) {
 256                         copy_buf_to_pkt(ip_hdr, sizeof(struct ipv4_hdr), pkt, eth_hdr_size);
 257                         copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
 258                                         sizeof(struct ipv4_hdr));
 259                 } else {
 260                         copy_buf_to_pkt(ip_hdr, sizeof(struct ipv6_hdr), pkt, eth_hdr_size);
 261                         copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
 262                                         sizeof(struct ipv6_hdr));
 263                 }
 264
 265                 /*
 266                  * Complete first mbuf of packet and append it to the
 267                  * burst of packets to be transmitted.
 268                  */
 269                 pkt->nb_segs = nb_pkt_segs;
 270                 pkt->pkt_len = pkt_len;
 271                 pkt->l2_len = eth_hdr_size;
 272
 273                 if (ipv4) {
 274                         pkt->vlan_tci  = ETHER_TYPE_IPv4;
 275                         pkt->l3_len = sizeof(struct ipv4_hdr);
 276                 } else {
 277                         pkt->vlan_tci  = ETHER_TYPE_IPv6;
 278                         pkt->l3_len = sizeof(struct ipv6_hdr);
 279                 }
 280
 281                 pkts_burst[nb_pkt] = pkt;
 282         }
 283
 284         return nb_pkt;
 285 }