--- /dev/null
+/*-
+ * 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.
+ */
+
+#include <rte_byteorder.h>
+#include <rte_mbuf.h>
+
+#include "packet_burst_generator.h"
+
+#define UDP_SRC_PORT 1024
+#define UDP_DST_PORT 1024
+
+
+#define IP_DEFTTL 64 /* from RFC 1340. */
+#define IP_VERSION 0x40
+#define IP_HDRLEN 0x05 /* default IP header length == five 32-bits words. */
+#define IP_VHL_DEF (IP_VERSION | IP_HDRLEN)
+
+static void
+copy_buf_to_pkt_segs(void *buf, unsigned len, struct rte_mbuf *pkt,
+ unsigned offset)
+{
+ struct rte_mbuf *seg;
+ void *seg_buf;
+ unsigned copy_len;
+
+ seg = pkt;
+ while (offset >= seg->data_len) {
+ offset -= seg->data_len;
+ seg = seg->next;
+ }
+ copy_len = seg->data_len - offset;
+ seg_buf = rte_pktmbuf_mtod_offset(seg, char *, offset);
+ while (len > copy_len) {
+ rte_memcpy(seg_buf, buf, (size_t) copy_len);
+ len -= copy_len;
+ buf = ((char *) buf + copy_len);
+ seg = seg->next;
+ seg_buf = rte_pktmbuf_mtod(seg, void *);
+ }
+ rte_memcpy(seg_buf, buf, (size_t) len);
+}
+
+static inline void
+copy_buf_to_pkt(void *buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
+{
+ if (offset + len <= pkt->data_len) {
+ rte_memcpy(rte_pktmbuf_mtod_offset(pkt, char *, offset), buf,
+ (size_t) len);
+ return;
+ }
+ copy_buf_to_pkt_segs(buf, len, pkt, offset);
+}
+
+void
+initialize_eth_header(struct ether_hdr *eth_hdr, struct ether_addr *src_mac,
+ struct ether_addr *dst_mac, uint16_t ether_type,
+ uint8_t vlan_enabled, uint16_t van_id)
+{
+ ether_addr_copy(dst_mac, ð_hdr->d_addr);
+ ether_addr_copy(src_mac, ð_hdr->s_addr);
+
+ if (vlan_enabled) {
+ struct vlan_hdr *vhdr = (struct vlan_hdr *)((uint8_t *)eth_hdr +
+ sizeof(struct ether_hdr));
+
+ eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
+
+ vhdr->eth_proto = rte_cpu_to_be_16(ether_type);
+ vhdr->vlan_tci = van_id;
+ } else {
+ eth_hdr->ether_type = rte_cpu_to_be_16(ether_type);
+ }
+}
+
+void
+initialize_arp_header(struct arp_hdr *arp_hdr, struct ether_addr *src_mac,
+ struct ether_addr *dst_mac, uint32_t src_ip, uint32_t dst_ip,
+ uint32_t opcode)
+{
+ arp_hdr->arp_hrd = rte_cpu_to_be_16(ARP_HRD_ETHER);
+ arp_hdr->arp_pro = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
+ arp_hdr->arp_hln = ETHER_ADDR_LEN;
+ arp_hdr->arp_pln = sizeof(uint32_t);
+ arp_hdr->arp_op = rte_cpu_to_be_16(opcode);
+ ether_addr_copy(src_mac, &arp_hdr->arp_data.arp_sha);
+ arp_hdr->arp_data.arp_sip = src_ip;
+ ether_addr_copy(dst_mac, &arp_hdr->arp_data.arp_tha);
+ arp_hdr->arp_data.arp_tip = dst_ip;
+}
+
+uint16_t
+initialize_udp_header(struct udp_hdr *udp_hdr, uint16_t src_port,
+ uint16_t dst_port, uint16_t pkt_data_len)
+{
+ uint16_t pkt_len;
+
+ pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
+
+ udp_hdr->src_port = rte_cpu_to_be_16(src_port);
+ udp_hdr->dst_port = rte_cpu_to_be_16(dst_port);
+ udp_hdr->dgram_len = rte_cpu_to_be_16(pkt_len);
+ udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
+
+ return pkt_len;
+}
+
+
+uint16_t
+initialize_ipv6_header(struct ipv6_hdr *ip_hdr, uint8_t *src_addr,
+ uint8_t *dst_addr, uint16_t pkt_data_len)
+{
+ ip_hdr->vtc_flow = 0;
+ ip_hdr->payload_len = pkt_data_len;
+ ip_hdr->proto = IPPROTO_UDP;
+ ip_hdr->hop_limits = IP_DEFTTL;
+
+ rte_memcpy(ip_hdr->src_addr, src_addr, sizeof(ip_hdr->src_addr));
+ rte_memcpy(ip_hdr->dst_addr, dst_addr, sizeof(ip_hdr->dst_addr));
+
+ return (uint16_t) (pkt_data_len + sizeof(struct ipv6_hdr));
+}
+
+uint16_t
+initialize_ipv4_header(struct ipv4_hdr *ip_hdr, uint32_t src_addr,
+ uint32_t dst_addr, uint16_t pkt_data_len)
+{
+ uint16_t pkt_len;
+ unaligned_uint16_t *ptr16;
+ uint32_t ip_cksum;
+
+ /*
+ * Initialize IP header.
+ */
+ pkt_len = (uint16_t) (pkt_data_len + sizeof(struct ipv4_hdr));
+
+ ip_hdr->version_ihl = IP_VHL_DEF;
+ ip_hdr->type_of_service = 0;
+ ip_hdr->fragment_offset = 0;
+ ip_hdr->time_to_live = IP_DEFTTL;
+ ip_hdr->next_proto_id = IPPROTO_UDP;
+ ip_hdr->packet_id = 0;
+ ip_hdr->total_length = rte_cpu_to_be_16(pkt_len);
+ ip_hdr->src_addr = rte_cpu_to_be_32(src_addr);
+ ip_hdr->dst_addr = rte_cpu_to_be_32(dst_addr);
+
+ /*
+ * Compute IP header checksum.
+ */
+ ptr16 = (unaligned_uint16_t *)ip_hdr;
+ ip_cksum = 0;
+ ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
+ ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
+ ip_cksum += ptr16[4];
+ ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
+ ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
+
+ /*
+ * Reduce 32 bit checksum to 16 bits and complement it.
+ */
+ ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
+ (ip_cksum & 0x0000FFFF);
+ ip_cksum %= 65536;
+ ip_cksum = (~ip_cksum) & 0x0000FFFF;
+ if (ip_cksum == 0)
+ ip_cksum = 0xFFFF;
+ ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
+
+ return pkt_len;
+}
+
+
+
+/*
+ * The maximum number of segments per packet is used when creating
+ * scattered transmit packets composed of a list of mbufs.
+ */
+#define RTE_MAX_SEGS_PER_PKT 255 /**< pkt.nb_segs is a 8-bit unsigned char. */
+
+
+int
+generate_packet_burst(struct rte_mempool *mp, struct rte_mbuf **pkts_burst,
+ struct ether_hdr *eth_hdr, uint8_t vlan_enabled, void *ip_hdr,
+ uint8_t ipv4, struct udp_hdr *udp_hdr, int nb_pkt_per_burst,
+ uint8_t pkt_len, uint8_t nb_pkt_segs)
+{
+ int i, nb_pkt = 0;
+ size_t eth_hdr_size;
+
+ struct rte_mbuf *pkt_seg;
+ struct rte_mbuf *pkt;
+
+ for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
+ pkt = rte_pktmbuf_alloc(mp);
+ if (pkt == NULL) {
+nomore_mbuf:
+ if (nb_pkt == 0)
+ return -1;
+ break;
+ }
+
+ pkt->data_len = pkt_len;
+ pkt_seg = pkt;
+ for (i = 1; i < nb_pkt_segs; i++) {
+ pkt_seg->next = rte_pktmbuf_alloc(mp);
+ if (pkt_seg->next == NULL) {
+ pkt->nb_segs = i;
+ rte_pktmbuf_free(pkt);
+ goto nomore_mbuf;
+ }
+ pkt_seg = pkt_seg->next;
+ pkt_seg->data_len = pkt_len;
+ }
+ pkt_seg->next = NULL; /* Last segment of packet. */
+
+ /*
+ * Copy headers in first packet segment(s).
+ */
+ if (vlan_enabled)
+ eth_hdr_size = sizeof(struct ether_hdr) + sizeof(struct vlan_hdr);
+ else
+ eth_hdr_size = sizeof(struct ether_hdr);
+
+ copy_buf_to_pkt(eth_hdr, eth_hdr_size, pkt, 0);
+
+ if (ipv4) {
+ copy_buf_to_pkt(ip_hdr, sizeof(struct ipv4_hdr), pkt, eth_hdr_size);
+ copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
+ sizeof(struct ipv4_hdr));
+ } else {
+ copy_buf_to_pkt(ip_hdr, sizeof(struct ipv6_hdr), pkt, eth_hdr_size);
+ copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
+ sizeof(struct ipv6_hdr));
+ }
+
+ /*
+ * Complete first mbuf of packet and append it to the
+ * burst of packets to be transmitted.
+ */
+ pkt->nb_segs = nb_pkt_segs;
+ pkt->pkt_len = pkt_len;
+ pkt->l2_len = eth_hdr_size;
+
+ if (ipv4) {
+ pkt->vlan_tci = ETHER_TYPE_IPv4;
+ pkt->l3_len = sizeof(struct ipv4_hdr);
+ } else {
+ pkt->vlan_tci = ETHER_TYPE_IPv6;
+ pkt->l3_len = sizeof(struct ipv6_hdr);
+ }
+
+ pkts_burst[nb_pkt] = pkt;
+ }
+
+ return nb_pkt;
+}
Code Review / deb_dpdk.git / blobdiff