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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);
85 initialize_eth_header(struct ether_hdr *eth_hdr, struct ether_addr *src_mac,
86 struct ether_addr *dst_mac, uint8_t ipv4, uint8_t vlan_enabled,
89 ether_addr_copy(dst_mac, ð_hdr->d_addr);
90 ether_addr_copy(src_mac, ð_hdr->s_addr);
93 struct vlan_hdr *vhdr = (struct vlan_hdr *)((uint8_t *)eth_hdr +
94 sizeof(struct ether_hdr));
96 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_VLAN);
99 vhdr->eth_proto = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
101 vhdr->eth_proto = rte_cpu_to_be_16(ETHER_TYPE_IPv6);
103 vhdr->vlan_tci = van_id;
106 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv4);
108 eth_hdr->ether_type = rte_cpu_to_be_16(ETHER_TYPE_IPv6);
114 initialize_udp_header(struct udp_hdr *udp_hdr, uint16_t src_port,
115 uint16_t dst_port, uint16_t pkt_data_len)
119 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct udp_hdr));
121 udp_hdr->src_port = rte_cpu_to_be_16(src_port);
122 udp_hdr->dst_port = rte_cpu_to_be_16(dst_port);
123 udp_hdr->dgram_len = rte_cpu_to_be_16(pkt_len);
124 udp_hdr->dgram_cksum = 0; /* No UDP checksum. */
131 initialize_ipv6_header(struct ipv6_hdr *ip_hdr, uint8_t *src_addr,
132 uint8_t *dst_addr, uint16_t pkt_data_len)
134 ip_hdr->vtc_flow = 0;
135 ip_hdr->payload_len = pkt_data_len;
136 ip_hdr->proto = IPPROTO_UDP;
137 ip_hdr->hop_limits = IP_DEFTTL;
139 rte_memcpy(ip_hdr->src_addr, src_addr, sizeof(ip_hdr->src_addr));
140 rte_memcpy(ip_hdr->dst_addr, dst_addr, sizeof(ip_hdr->dst_addr));
142 return (uint16_t) (pkt_data_len + sizeof(struct ipv6_hdr));
146 initialize_ipv4_header(struct ipv4_hdr *ip_hdr, uint32_t src_addr,
147 uint32_t dst_addr, uint16_t pkt_data_len)
154 * Initialize IP header.
156 pkt_len = (uint16_t) (pkt_data_len + sizeof(struct ipv4_hdr));
158 ip_hdr->version_ihl = IP_VHL_DEF;
159 ip_hdr->type_of_service = 0;
160 ip_hdr->fragment_offset = 0;
161 ip_hdr->time_to_live = IP_DEFTTL;
162 ip_hdr->next_proto_id = IPPROTO_UDP;
163 ip_hdr->packet_id = 0;
164 ip_hdr->total_length = rte_cpu_to_be_16(pkt_len);
165 ip_hdr->src_addr = rte_cpu_to_be_32(src_addr);
166 ip_hdr->dst_addr = rte_cpu_to_be_32(dst_addr);
169 * Compute IP header checksum.
171 ptr16 = (uint16_t *)ip_hdr;
173 ip_cksum += ptr16[0]; ip_cksum += ptr16[1];
174 ip_cksum += ptr16[2]; ip_cksum += ptr16[3];
175 ip_cksum += ptr16[4];
176 ip_cksum += ptr16[6]; ip_cksum += ptr16[7];
177 ip_cksum += ptr16[8]; ip_cksum += ptr16[9];
180 * Reduce 32 bit checksum to 16 bits and complement it.
182 ip_cksum = ((ip_cksum & 0xFFFF0000) >> 16) +
183 (ip_cksum & 0x0000FFFF);
185 ip_cksum = (~ip_cksum) & 0x0000FFFF;
188 ip_hdr->hdr_checksum = (uint16_t) ip_cksum;
196 * The maximum number of segments per packet is used when creating
197 * scattered transmit packets composed of a list of mbufs.
199 #define RTE_MAX_SEGS_PER_PKT 255 /**< pkt.nb_segs is a 8-bit unsigned char. */
203 generate_packet_burst(struct rte_mempool *mp, struct rte_mbuf **pkts_burst,
204 struct ether_hdr *eth_hdr, uint8_t vlan_enabled, void *ip_hdr,
205 uint8_t ipv4, struct udp_hdr *udp_hdr, int nb_pkt_per_burst,
206 uint8_t pkt_len, uint8_t nb_pkt_segs)
211 struct rte_mbuf *pkt_seg;
212 struct rte_mbuf *pkt;
214 for (nb_pkt = 0; nb_pkt < nb_pkt_per_burst; nb_pkt++) {
215 pkt = rte_pktmbuf_alloc(mp);
223 pkt->data_len = pkt_len;
225 for (i = 1; i < nb_pkt_segs; i++) {
226 pkt_seg->next = rte_pktmbuf_alloc(mp);
227 if (pkt_seg->next == NULL) {
229 rte_pktmbuf_free(pkt);
232 pkt_seg = pkt_seg->next;
233 pkt_seg->data_len = pkt_len;
235 pkt_seg->next = NULL; /* Last segment of packet. */
238 * Copy headers in first packet segment(s).
241 eth_hdr_size = sizeof(struct ether_hdr) + sizeof(struct vlan_hdr);
243 eth_hdr_size = sizeof(struct ether_hdr);
245 copy_buf_to_pkt(eth_hdr, eth_hdr_size, pkt, 0);
248 copy_buf_to_pkt(ip_hdr, sizeof(struct ipv4_hdr), pkt, eth_hdr_size);
249 copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
250 sizeof(struct ipv4_hdr));
252 copy_buf_to_pkt(ip_hdr, sizeof(struct ipv6_hdr), pkt, eth_hdr_size);
253 copy_buf_to_pkt(udp_hdr, sizeof(*udp_hdr), pkt, eth_hdr_size +
254 sizeof(struct ipv6_hdr));
258 * Complete first mbuf of packet and append it to the
259 * burst of packets to be transmitted.
261 pkt->nb_segs = nb_pkt_segs;
262 pkt->pkt_len = pkt_len;
263 pkt->l2_len = eth_hdr_size;
266 pkt->vlan_tci = ETHER_TYPE_IPv4;
267 pkt->l3_len = sizeof(struct ipv4_hdr);
269 pkt->vlan_tci = ETHER_TYPE_IPv6;
270 pkt->l3_len = sizeof(struct ipv6_hdr);
273 pkts_burst[nb_pkt] = pkt;