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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 | /* main.c - Application main entry point */ /* * Copyright (c) 2016 Intel Corporation * * SPDX-License-Identifier: Apache-2.0 */ #include <logging/log.h> LOG_MODULE_REGISTER(net_test, CONFIG_NET_DHCPV4_LOG_LEVEL); #include <zephyr.h> #include <linker/sections.h> #include <zephyr/types.h> #include <stddef.h> #include <string.h> #include <stdio.h> #include <errno.h> #include <device.h> #include <init.h> #include <net/net_core.h> #include <net/net_pkt.h> #include <net/net_ip.h> #include <net/dhcpv4.h> #include <net/ethernet.h> #include <net/net_mgmt.h> #include <net/dummy.h> #include "ipv4.h" #include "udp_internal.h" #include <tc_util.h> #include <ztest.h> #define NET_LOG_ENABLED 1 #include "net_private.h" /* Sample DHCP offer (382 bytes) */ static const unsigned char offer[382] = { 0x02, 0x01, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0xed, 0x48, 0x9e, 0x0a, 0xb8, 0x09, 0x01, 0x0a, 0xed, 0x48, 0x02, 0x00, 0x00, 0x5E, 0x00, 0x53, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x63, 0x82, 0x53, 0x63, 0x35, 0x01, 0x02, 0x01, 0x04, 0xff, 0xff, 0xff, 0x00, 0x3a, 0x04, 0x00, 0x00, 0x54, 0x60, 0x3b, 0x04, 0x00, 0x00, 0x93, 0xa8, 0x33, 0x04, 0x00, 0x00, 0xa8, 0xc0, 0x36, 0x04, 0x0a, 0xb8, 0x09, 0x01, 0x03, 0x04, 0x0a, 0xed, 0x48, 0x01, 0x0f, 0x0d, 0x66, 0x69, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x2e, 0x63, 0x6f, 0x6d, 0x00, 0x06, 0x0c, 0x0a, 0xf8, 0x02, 0x01, 0xa3, 0x21, 0xfd, 0x44, 0x0a, 0xb8, 0x09, 0x01, 0x77, 0x3d, 0x02, 0x66, 0x69, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x03, 0x67, 0x65, 0x72, 0x04, 0x63, 0x6f, 0x72, 0x70, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x04, 0x63, 0x6f, 0x72, 0x70, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x2c, 0x08, 0xa3, 0x21, 0x07, 0x56, 0x8f, 0xb6, 0xfa, 0x69, 0xff }; /* Sample DHCPv4 ACK */ static const unsigned char ack[382] = { 0x02, 0x01, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0a, 0xed, 0x48, 0x9e, 0x00, 0x00, 0x00, 0x00, 0x0a, 0xed, 0x48, 0x03, 0x00, 0x00, 0x5E, 0x00, 0x53, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x63, 0x82, 0x53, 0x63, 0x35, 0x01, 0x05, 0x3a, 0x04, 0x00, 0x00, 0x54, 0x60, 0x3b, 0x04, 0x00, 0x00, 0x93, 0xa8, 0x33, 0x04, 0x00, 0x00, 0xa8, 0xc0, 0x36, 0x04, 0x0a, 0xb8, 0x09, 0x01, 0x01, 0x04, 0xff, 0xff, 0xff, 0x00, 0x03, 0x04, 0x0a, 0xed, 0x48, 0x01, 0x0f, 0x0d, 0x66, 0x69, 0x2e, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x2e, 0x63, 0x6f, 0x6d, 0x00, 0x06, 0x0c, 0x0a, 0xf8, 0x02, 0x01, 0xa3, 0x21, 0xfd, 0x44, 0x0a, 0xb8, 0x09, 0x01, 0x77, 0x3d, 0x02, 0x66, 0x69, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x03, 0x67, 0x65, 0x72, 0x04, 0x63, 0x6f, 0x72, 0x70, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x04, 0x63, 0x6f, 0x72, 0x70, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x05, 0x69, 0x6e, 0x74, 0x65, 0x6c, 0x03, 0x63, 0x6f, 0x6d, 0x00, 0x2c, 0x08, 0xa3, 0x21, 0x07, 0x56, 0x8f, 0xb6, 0xfa, 0x69, 0xff }; static const struct in_addr server_addr = { { { 192, 0, 2, 1 } } }; static const struct in_addr client_addr = { { { 255, 255, 255, 255 } } }; #define SERVER_PORT 67 #define CLIENT_PORT 68 #define MSG_TYPE 53 #define DISCOVER 1 #define REQUEST 3 struct dhcp_msg { u32_t xid; u8_t type; }; static struct k_sem test_lock; #define WAIT_TIME K_SECONDS(CONFIG_NET_DHCPV4_INITIAL_DELAY_MAX + 1) struct net_dhcpv4_context { u8_t mac_addr[sizeof(struct net_eth_addr)]; struct net_linkaddr ll_addr; }; static int net_dhcpv4_dev_init(struct device *dev) { struct net_dhcpv4_context *net_dhcpv4_context = dev->driver_data; net_dhcpv4_context = net_dhcpv4_context; return 0; } static u8_t *net_dhcpv4_get_mac(struct device *dev) { struct net_dhcpv4_context *context = dev->driver_data; if (context->mac_addr[2] == 0x00) { /* 00-00-5E-00-53-xx Documentation RFC 7042 */ context->mac_addr[0] = 0x00; context->mac_addr[1] = 0x00; context->mac_addr[2] = 0x5E; context->mac_addr[3] = 0x00; context->mac_addr[4] = 0x53; context->mac_addr[5] = 0x01; } return context->mac_addr; } static void net_dhcpv4_iface_init(struct net_if *iface) { u8_t *mac = net_dhcpv4_get_mac(net_if_get_device(iface)); net_if_set_link_addr(iface, mac, 6, NET_LINK_ETHERNET); } struct net_pkt *prepare_dhcp_offer(struct net_if *iface, u32_t xid) { struct net_pkt *pkt; pkt = net_pkt_alloc_with_buffer(iface, sizeof(offer), AF_INET, IPPROTO_UDP, K_FOREVER); if (!pkt) { return NULL; } net_pkt_set_ipv4_ttl(pkt, 0xFF); if (net_ipv4_create(pkt, &server_addr, &client_addr) || net_udp_create(pkt, htons(SERVER_PORT), htons(CLIENT_PORT))) { goto fail; } if (net_pkt_write(pkt, offer, 4)) { goto fail; } /* Update xid from the client request */ if (net_pkt_write_be32(pkt, xid)) { goto fail; } if (net_pkt_write(pkt, offer + 8, sizeof(offer) - 8)) { goto fail; } net_pkt_cursor_init(pkt); net_ipv4_finalize(pkt, IPPROTO_UDP); return pkt; fail: net_pkt_unref(pkt); return NULL; } struct net_pkt *prepare_dhcp_ack(struct net_if *iface, u32_t xid) { struct net_pkt *pkt; pkt = net_pkt_alloc_with_buffer(iface, sizeof(offer), AF_INET, IPPROTO_UDP, K_FOREVER); if (!pkt) { return NULL; } net_pkt_set_ipv4_ttl(pkt, 0xFF); if (net_ipv4_create(pkt, &server_addr, &client_addr) || net_udp_create(pkt, htons(SERVER_PORT), htons(CLIENT_PORT))) { goto fail; } if (net_pkt_write(pkt, ack, 4)) { goto fail; } /* Update xid from the client request */ if (net_pkt_write_be32(pkt, xid)) { goto fail; } if (net_pkt_write(pkt, ack + 8, sizeof(ack) - 8)) { goto fail; } net_pkt_cursor_init(pkt); net_ipv4_finalize(pkt, IPPROTO_UDP); return pkt; fail: net_pkt_unref(pkt); return NULL; } static int parse_dhcp_message(struct net_pkt *pkt, struct dhcp_msg *msg) { /* Skip IPv4 and UDP headers */ if (net_pkt_skip(pkt, NET_IPV4UDPH_LEN)) { return 0; } /* Skip DHCPv4 headers (size of op, htype, hlen, hops) */ if (net_pkt_skip(pkt, 4)) { return 0; } if (net_pkt_read_be32(pkt, &msg->xid)) { return 0; } /* Skip DHCPv4 Options (size of op, htype, ... cookie) */ if (net_pkt_skip(pkt, 36 + 64 + 128 + 4)) { return 0; } while (1) { u8_t length = 0U; u8_t type; if (net_pkt_read_u8(pkt, &type)) { return 0; } if (type == MSG_TYPE) { if (net_pkt_skip(pkt, 1)) { return 0; } if (net_pkt_read_u8(pkt, &msg->type)) { return 0; } return 1; } if (net_pkt_read_u8(pkt, &length)) { return 0; } if (length && net_pkt_skip(pkt, length)) { return 0; } } return 0; } static int tester_send(struct device *dev, struct net_pkt *pkt) { struct net_pkt *rpkt; struct dhcp_msg msg; (void)memset(&msg, 0, sizeof(msg)); if (!pkt->frags) { TC_PRINT("No data to send!\n"); return -ENODATA; } parse_dhcp_message(pkt, &msg); if (msg.type == DISCOVER) { /* Reply with DHCPv4 offer message */ rpkt = prepare_dhcp_offer(net_pkt_iface(pkt), msg.xid); if (!rpkt) { return -EINVAL; } } else if (msg.type == REQUEST) { /* Reply with DHCPv4 ACK message */ rpkt = prepare_dhcp_ack(net_pkt_iface(pkt), msg.xid); if (!rpkt) { return -EINVAL; } } else { /* Invalid message type received */ return -EINVAL; } if (net_recv_data(net_pkt_iface(rpkt), rpkt)) { net_pkt_unref(rpkt); return -EINVAL; } return 0; } struct net_dhcpv4_context net_dhcpv4_context_data; static struct dummy_api net_dhcpv4_if_api = { .iface_api.init = net_dhcpv4_iface_init, .send = tester_send, }; NET_DEVICE_INIT(net_dhcpv4_test, "net_dhcpv4_test", net_dhcpv4_dev_init, &net_dhcpv4_context_data, NULL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT, &net_dhcpv4_if_api, DUMMY_L2, NET_L2_GET_CTX_TYPE(DUMMY_L2), 127); static struct net_mgmt_event_callback rx_cb; static void receiver_cb(struct net_mgmt_event_callback *cb, u32_t nm_event, struct net_if *iface) { if (nm_event != NET_EVENT_IPV4_ADDR_ADD) { /* Spurious callback. */ return; } k_sem_give(&test_lock); } void test_dhcp(void) { struct net_if *iface; k_sem_init(&test_lock, 0, UINT_MAX); net_mgmt_init_event_callback(&rx_cb, receiver_cb, NET_EVENT_IPV4_ADDR_ADD); net_mgmt_add_event_callback(&rx_cb); iface = net_if_get_default(); if (!iface) { zassert_true(false, "Interface not available"); } net_dhcpv4_start(iface); if (k_sem_take(&test_lock, WAIT_TIME)) { zassert_true(false, "Timeout while waiting"); } } /**test case main entry */ void test_main(void) { ztest_test_suite(test_dhcpv4, ztest_unit_test(test_dhcp)); ztest_run_test_suite(test_dhcpv4); } |