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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, ð_hdr->d_addr); | |
90 | ether_addr_copy(src_mac, ð_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 | } |