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34 #include <rte_byteorder.h>
37 #include "packet_burst_generator.h"
39 #define UDP_SRC_PORT 1024
40 #define UDP_DST_PORT 1024
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)
49 copy_buf_to_pkt_segs(void *buf, unsigned len, struct rte_mbuf *pkt,
57 while (offset >= seg->data_len) {
58 offset -= seg->data_len;
61 copy_len = seg->data_len - offset;
62 seg_buf = rte_pktmbuf_mtod(seg, char *) + offset;
63 while (len > copy_len) {
64 rte_memcpy(seg_buf, buf, (size_t) copy_len);
66 buf = ((char *) buf + copy_len);
68 seg_buf = rte_pktmbuf_mtod(seg, void *);
70 rte_memcpy(seg_buf, buf, (size_t) len);
74 copy_buf_to_pkt(void *buf, unsigned len, struct rte_mbuf *pkt, unsigned offset)
76 if (offset + len <= pkt->data_len) {
77 rte_memcpy(rte_pktmbuf_mtod(pkt, char *) + offset, buf, (size_t) len);
80 copy_buf_to_pkt_segs(buf, len, pkt, offset);
84 initialize_eth_header(struct ether_hdr *eth_hdr, struct ether_addr *src_mac,
85 struct ether_addr *dst_mac, uint16_t ether_type,
86 uint8_t vlan_enabled, uint16_t van_id)
88 ether_addr_copy(dst_mac, ð_hdr->d_addr);
89 ether_addr_copy(src_mac, ð_hdr->s_addr);
92 struct vlan_hdr *vhdr = (struct vlan_hdr *)((uint8_t *)eth_hdr +
93 sizeof(struct ether_hdr));
95 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
97 vhdr->eth_proto = rte_cpu_to_be_16(ether_type);
98 vhdr->vlan_tci = van_id;
100 eth_hdr->ether_type = rte_cpu_to_be_16(ether_type);
105 initialize_arp_header(struct arp_hdr *arp_hdr, struct ether_addr *src_mac,
106 struct ether_addr *dst_mac, uint32_t src_ip, uint32_t dst_ip,
109 arp_hdr->arp_hrd = rte_cpu_to_be_16(ARP_HRD_ETHER);
110 arp_hdr->arp_pro = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
111 arp_hdr->arp_hln = ETHER_ADDR_LEN;
112 arp_hdr->arp_pln = sizeof(uint32_t);
113 arp_hdr->arp_op = rte_cpu_to_be_16(opcode);
114 ether_addr_copy(src_mac, &arp_hdr->arp_data.arp_sha);
115 arp_hdr->arp_data.arp_sip = src_ip;
116 ether_addr_copy(dst_mac, &arp_hdr->arp_data.arp_tha);
117 arp_hdr->arp_data.arp_tip = dst_ip;
121 initialize_udp_header(struct udp_hdr *udp_hdr, uint16_t src_port,
122 uint16_t dst_port, uint16_t pkt_data_len)
126 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
128 udp_hdr->src_port = rte_cpu_to_be_16(src_port);
129 udp_hdr->dst_port = rte_cpu_to_be_16(dst_port);
130 udp_hdr->dgram_len = rte_cpu_to_be_16(pkt_len);
131 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
138 initialize_ipv6_header(struct ipv6_hdr *ip_hdr, uint8_t *src_addr,
139 uint8_t *dst_addr, uint16_t pkt_data_len)
141 ip_hdr->vtc_flow = 0;
142 ip_hdr->payload_len = pkt_data_len;
143 ip_hdr->proto = IPPROTO_UDP;
144 ip_hdr->hop_limits = IP_DEFTTL;
146 rte_memcpy(ip_hdr->src_addr, src_addr, sizeof(ip_hdr->src_addr));
147 rte_memcpy(ip_hdr->dst_addr, dst_addr, sizeof(ip_hdr->dst_addr));
149 return (uint16_t) (pkt_data_len + sizeof(struct ipv6_hdr));
153 initialize_ipv4_header(struct ipv4_hdr *ip_hdr, uint32_t src_addr,
154 uint32_t dst_addr, uint16_t pkt_data_len)
157 unaligned_uint16_t *ptr16;
161 * Initialize IP header.
163 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct ipv4_hdr));
165 ip_hdr->version_ihl = IP_VHL_DEF;
166 ip_hdr->type_of_service = 0;
167 ip_hdr->fragment_offset = 0;
168 ip_hdr->time_to_live = IP_DEFTTL;
169 ip_hdr->next_proto_id = IPPROTO_UDP;
170 ip_hdr->packet_id = 0;
171 ip_hdr->total_length = rte_cpu_to_be_16(pkt_len);
172 ip_hdr->src_addr = rte_cpu_to_be_32(src_addr);
173 ip_hdr->dst_addr = rte_cpu_to_be_32(dst_addr);
176 * Compute IP header checksum.
178 ptr16 = (unaligned_uint16_t *)ip_hdr;
180 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
181 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
182 ip_cksum += ptr16[4];
183 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
184 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
187 * Reduce 32 bit checksum to 16 bits and complement it.
189 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
190 (ip_cksum & 0x0000FFFF);
192 ip_cksum = (~ip_cksum) & 0x0000FFFF;
195 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
203 * The maximum number of segments per packet is used when creating
204 * scattered transmit packets composed of a list of mbufs.
206 #define RTE_MAX_SEGS_PER_PKT 255 /**< pkt.nb_segs is a 8-bit unsigned char. */
210 generate_packet_burst(struct rte_mempool *mp, struct rte_mbuf **pkts_burst,
211 struct ether_hdr *eth_hdr, uint8_t vlan_enabled, void *ip_hdr,
212 uint8_t ipv4, struct udp_hdr *udp_hdr, int nb_pkt_per_burst,
213 uint8_t pkt_len, uint8_t nb_pkt_segs)
218 struct rte_mbuf *pkt_seg;
219 struct rte_mbuf *pkt;
221 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
222 pkt = rte_pktmbuf_alloc(mp);
230 pkt->data_len = pkt_len;
232 for (i = 1; i < nb_pkt_segs; i++) {
233 pkt_seg->next = rte_pktmbuf_alloc(mp);
234 if (pkt_seg->next == NULL) {
236 rte_pktmbuf_free(pkt);
239 pkt_seg = pkt_seg->next;
240 pkt_seg->data_len = pkt_len;
242 pkt_seg->next = NULL; /* Last segment of packet. */
245 * Copy headers in first packet segment(s).
248 eth_hdr_size = sizeof(struct ether_hdr) + sizeof(struct vlan_hdr);
250 eth_hdr_size = sizeof(struct ether_hdr);
252 copy_buf_to_pkt(eth_hdr, eth_hdr_size, pkt, 0);
255 copy_buf_to_pkt(ip_hdr, sizeof(struct ipv4_hdr), pkt, eth_hdr_size);
256 copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
257 sizeof(struct ipv4_hdr));
259 copy_buf_to_pkt(ip_hdr, sizeof(struct ipv6_hdr), pkt, eth_hdr_size);
260 copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
261 sizeof(struct ipv6_hdr));
265 * Complete first mbuf of packet and append it to the
266 * burst of packets to be transmitted.
268 pkt->nb_segs = nb_pkt_segs;
269 pkt->pkt_len = pkt_len;
270 pkt->l2_len = eth_hdr_size;
273 pkt->vlan_tci = ETHER_TYPE_IPv4;
274 pkt->l3_len = sizeof(struct ipv4_hdr);
277 pkt->ol_flags = PKT_RX_IPV4_HDR | PKT_RX_VLAN_PKT;
279 pkt->ol_flags = PKT_RX_IPV4_HDR;
281 pkt->vlan_tci = ETHER_TYPE_IPv6;
282 pkt->l3_len = sizeof(struct ipv6_hdr);
285 pkt->ol_flags = PKT_RX_IPV6_HDR | PKT_RX_VLAN_PKT;
287 pkt->ol_flags = PKT_RX_IPV6_HDR;
290 pkts_burst[nb_pkt] = pkt;