netlink_protocol.c revision 77c3ff8e0644f1e120e4b2ebc7222150b0446f3b
1/* 2 * Check decoding of netlink protocol. 3 * 4 * Copyright (c) 2014-2017 Dmitry V. Levin <ldv@altlinux.org> 5 * Copyright (c) 2016 Fabien Siron <fabien.siron@epita.fr> 6 * All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31#include "tests.h" 32 33#ifdef HAVE_SYS_XATTR_H 34 35# include <stdio.h> 36# include <stdlib.h> 37# include <string.h> 38# include <unistd.h> 39# include <sys/xattr.h> 40# include <netinet/in.h> 41# include "netlink.h" 42# include <linux/sock_diag.h> 43# include <linux/netlink_diag.h> 44 45static void 46send_query(const int fd) 47{ 48 static const struct req { 49 struct nlmsghdr nlh; 50 const char magic[4]; 51 } c_req = { 52 .nlh = { 53 .nlmsg_len = sizeof(struct req), 54 .nlmsg_type = NLMSG_NOOP, 55 .nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST 56 }, 57 .magic = "abcd" 58 }; 59 struct req *const req = tail_memdup(&c_req, sizeof(c_req)); 60 long rc; 61 const char *errstr; 62 63 /* zero address */ 64 rc = sendto(fd, NULL, sizeof(*req), MSG_DONTWAIT, NULL, 0); 65 printf("sendto(%d, NULL, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 66 fd, (unsigned) sizeof(*req), sprintrc(rc)); 67 68 /* zero length */ 69 rc = sendto(fd, req, 0, MSG_DONTWAIT, NULL, 0); 70 printf("sendto(%d, \"\", 0, MSG_DONTWAIT, NULL, 0) = %s\n", 71 fd, sprintrc(rc)); 72 73 /* zero address and length */ 74 rc = sendto(fd, NULL, 0, MSG_DONTWAIT, NULL, 0); 75 printf("sendto(%d, NULL, 0, MSG_DONTWAIT, NULL, 0) = %s\n", 76 fd, sprintrc(rc)); 77 78 /* unfetchable struct nlmsghdr */ 79 const void *const efault = tail_alloc(sizeof(struct nlmsghdr) - 1); 80 rc = sendto(fd, efault, sizeof(struct nlmsghdr), MSG_DONTWAIT, NULL, 0); 81 printf("sendto(%d, %p, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 82 fd, efault, (unsigned) sizeof(struct nlmsghdr), sprintrc(rc)); 83 84 /* whole message length < sizeof(struct nlmsghdr) */ 85 rc = sendto(fd, req->magic, sizeof(req->magic), MSG_DONTWAIT, NULL, 0); 86 printf("sendto(%d, \"\\x61\\x62\\x63\\x64\"" 87 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 88 fd, (unsigned) sizeof(req->magic), sprintrc(rc)); 89 90 /* a single message with some data */ 91 rc = sendto(fd, req, sizeof(*req), MSG_DONTWAIT, NULL, 0); 92 printf("sendto(%d, {{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 93 ", seq=0, pid=0}, \"\\x61\\x62\\x63\\x64\"}" 94 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 95 fd, req->nlh.nlmsg_len, NLM_F_DUMP, 96 (unsigned) sizeof(*req), sprintrc(rc)); 97 98 /* a single message without data */ 99 req->nlh.nlmsg_len = sizeof(req->nlh); 100 rc = sendto(fd, &req->nlh, sizeof(req->nlh), MSG_DONTWAIT, NULL, 0); 101 printf("sendto(%d, {len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 102 ", seq=0, pid=0}, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 103 fd, req->nlh.nlmsg_len, NLM_F_DUMP, 104 (unsigned) sizeof(req->nlh), sprintrc(rc)); 105 106 /* nlmsg_len > whole message length */ 107 req->nlh.nlmsg_len = sizeof(*req) + 8; 108 rc = sendto(fd, req, sizeof(*req), MSG_DONTWAIT, NULL, 0); 109 printf("sendto(%d, {{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 110 ", seq=0, pid=0}, \"\\x61\\x62\\x63\\x64\"}" 111 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 112 fd, req->nlh.nlmsg_len, NLM_F_DUMP, 113 (unsigned) sizeof(*req), sprintrc(rc)); 114 115 /* nlmsg_len < sizeof(struct nlmsghdr) */ 116 req->nlh.nlmsg_len = 8; 117 rc = sendto(fd, req, sizeof(*req), MSG_DONTWAIT, NULL, 0); 118 printf("sendto(%d, {len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 119 ", seq=0, pid=0}, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 120 fd, req->nlh.nlmsg_len, NLM_F_DUMP, 121 (unsigned) sizeof(*req), sprintrc(rc)); 122 123 /* a sequence of two nlmsg objects */ 124 struct reqs { 125 struct req req1; 126 char padding[NLMSG_ALIGN(sizeof(struct req)) - sizeof(struct req)]; 127 struct req req2; 128 } *const reqs = tail_alloc(sizeof(*reqs)); 129 memcpy(&reqs->req1, &c_req, sizeof(c_req)); 130 memcpy(&reqs->req2, &c_req, sizeof(c_req)); 131 132 rc = sendto(fd, reqs, sizeof(*reqs), MSG_DONTWAIT, NULL, 0); 133 printf("sendto(%d, [{{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 134 ", seq=0, pid=0}, \"\\x61\\x62\\x63\\x64\"}" 135 ", {{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 136 ", seq=0, pid=0}, \"\\x61\\x62\\x63\\x64\"}]" 137 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 138 fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP, 139 reqs->req2.nlh.nlmsg_len, NLM_F_DUMP, 140 (unsigned) sizeof(*reqs), sprintrc(rc)); 141 142 /* unfetchable second struct nlmsghdr */ 143 void *const efault2 = tail_memdup(&reqs->req1, sizeof(reqs->req1)); 144 rc = sendto(fd, efault2, sizeof(*reqs), MSG_DONTWAIT, NULL, 0); 145 printf("sendto(%d, [{{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 146 ", seq=0, pid=0}, \"\\x61\\x62\\x63\\x64\"}" 147 ", %p], %u, MSG_DONTWAIT, NULL, 0) = %s\n", 148 fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP, 149 &((struct reqs *) efault2)->req2, (unsigned) sizeof(*reqs), 150 sprintrc(rc)); 151 152 /* message length is not enough for the second struct nlmsghdr */ 153 rc = sendto(fd, reqs, sizeof(*reqs) - sizeof(req->nlh), MSG_DONTWAIT, 154 NULL, 0); 155 errstr = sprintrc(rc); 156 printf("sendto(%d, [{{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 157 ", seq=0, pid=0}, \"\\x61\\x62\\x63\\x64\"}, ", 158 fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP); 159 print_quoted_hex(&reqs->req2.nlh, 160 sizeof(reqs->req2) - sizeof(req->nlh)); 161 printf("], %u, MSG_DONTWAIT, NULL, 0) = %s\n", 162 (unsigned) (sizeof(*reqs) - sizeof(req->nlh)), errstr); 163 164 /* second nlmsg_len < sizeof(struct nlmsghdr) */ 165 reqs->req2.nlh.nlmsg_len = 4; 166 rc = sendto(fd, reqs, sizeof(*reqs), MSG_DONTWAIT, NULL, 0); 167 printf("sendto(%d, [{{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 168 ", seq=0, pid=0}, \"\\x61\\x62\\x63\\x64\"}" 169 ", {len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 170 ", seq=0, pid=0}], %u, MSG_DONTWAIT, NULL, 0) = %s\n", 171 fd, reqs->req1.nlh.nlmsg_len, NLM_F_DUMP, 172 reqs->req2.nlh.nlmsg_len, NLM_F_DUMP, 173 (unsigned) sizeof(*reqs), sprintrc(rc)); 174 175 /* abbreviated output */ 176# define ABBREV_LEN (DEFAULT_STRLEN + 1) 177 const unsigned int msg_len = sizeof(struct nlmsghdr) * ABBREV_LEN; 178 struct nlmsghdr *const msgs = tail_alloc(msg_len); 179 unsigned int i; 180 for (i = 0; i < ABBREV_LEN; ++i) { 181 msgs[i].nlmsg_len = sizeof(*msgs); 182 msgs[i].nlmsg_type = NLMSG_NOOP; 183 msgs[i].nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST; 184 msgs[i].nlmsg_seq = i; 185 msgs[i].nlmsg_pid = 0; 186 } 187 188 rc = sendto(fd, msgs, msg_len, MSG_DONTWAIT, NULL, 0); 189 errstr = sprintrc(rc); 190 printf("sendto(%d, [", fd); 191 for (i = 0; i < DEFAULT_STRLEN; ++i) { 192 if (i) 193 printf(", "); 194 printf("{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 195 ", seq=%u, pid=0}", 196 msgs[i].nlmsg_len, NLM_F_DUMP, msgs[i].nlmsg_seq); 197 } 198 printf(", ...], %u, MSG_DONTWAIT, NULL, 0) = %s\n", msg_len, errstr); 199} 200 201static void 202test_nlmsgerr(const int fd) 203{ 204 struct nlmsgerr *err; 205 struct nlmsghdr *nlh; 206 void *const nlh0 = tail_alloc(NLMSG_HDRLEN); 207 long rc; 208 209 /* error message without enough room for the error code */ 210 nlh = nlh0; 211 nlh->nlmsg_len = NLMSG_HDRLEN + 4; 212 nlh->nlmsg_type = NLMSG_ERROR; 213 nlh->nlmsg_flags = NLM_F_REQUEST; 214 nlh->nlmsg_seq = 0; 215 nlh->nlmsg_pid = 0; 216 217 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 218 printf("sendto(%d, {{len=%u, type=NLMSG_ERROR, flags=NLM_F_REQUEST" 219 ", seq=0, pid=0}, %p}, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 220 fd, nlh->nlmsg_len, nlh0 + NLMSG_HDRLEN, 221 nlh->nlmsg_len, sprintrc(rc)); 222 223 nlh->nlmsg_len = NLMSG_HDRLEN + 2; 224 nlh = nlh0 - 2; 225 memmove(nlh, nlh0, sizeof(*nlh)); 226 memcpy(NLMSG_DATA(nlh), "42", 2); 227 228 rc = sendto(fd, nlh, NLMSG_HDRLEN + 2, MSG_DONTWAIT, NULL, 0); 229 printf("sendto(%d, {{len=%u, type=NLMSG_ERROR, flags=NLM_F_REQUEST" 230 ", seq=0, pid=0}, \"\\x34\\x32\"}" 231 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 232 fd, NLMSG_HDRLEN + 2, NLMSG_HDRLEN + 2, sprintrc(rc)); 233 234 /* error message with room for the error code only */ 235 nlh = nlh0 - sizeof(err->error); 236 nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(err->error); 237 nlh->nlmsg_type = NLMSG_ERROR; 238 nlh->nlmsg_flags = NLM_F_REQUEST; 239 nlh->nlmsg_seq = 0; 240 nlh->nlmsg_pid = 0; 241 err = NLMSG_DATA(nlh); 242 err->error = 42; 243 244 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 245 printf("sendto(%d, {{len=%u, type=NLMSG_ERROR, flags=NLM_F_REQUEST" 246 ", seq=0, pid=0}, {error=42}}, %u, MSG_DONTWAIT, NULL, 0)" 247 " = %s\n", fd, nlh->nlmsg_len, nlh->nlmsg_len, sprintrc(rc)); 248 249 err->error = -1; 250 251 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 252 printf("sendto(%d, {{len=%u, type=NLMSG_ERROR, flags=NLM_F_REQUEST" 253 ", seq=0, pid=0}, {error=-EPERM}}, %u, MSG_DONTWAIT, NULL, 0)" 254 " = %s\n", fd, nlh->nlmsg_len, nlh->nlmsg_len, sprintrc(rc)); 255 256 err->error = -32767; 257 nlh->nlmsg_len += sizeof(err->msg.nlmsg_len); 258 259 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 260 printf("sendto(%d, {{len=%u, type=NLMSG_ERROR, flags=NLM_F_REQUEST" 261 ", seq=0, pid=0}, {error=-32767, msg=%p}}" 262 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 263 fd, nlh->nlmsg_len, nlh0 + NLMSG_HDRLEN, 264 nlh->nlmsg_len, sprintrc(rc)); 265 266 /* error message with room for the error code and a header */ 267 nlh = nlh0 - sizeof(*err); 268 nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(*err); 269 nlh->nlmsg_type = NLMSG_ERROR; 270 nlh->nlmsg_flags = NLM_F_REQUEST; 271 nlh->nlmsg_seq = 0; 272 nlh->nlmsg_pid = 0; 273 err = NLMSG_DATA(nlh); 274 err->error = -13; 275 err->msg.nlmsg_len = NLMSG_HDRLEN; 276 err->msg.nlmsg_type = NLMSG_NOOP; 277 err->msg.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST; 278 err->msg.nlmsg_seq = 42; 279 err->msg.nlmsg_pid = 1234; 280 281 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 282 printf("sendto(%d, {{len=%u, type=NLMSG_ERROR, flags=NLM_F_REQUEST" 283 ", seq=0, pid=0}, {error=-EACCES" 284 ", msg={len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 285 ", seq=%u, pid=%u}}}, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 286 fd, nlh->nlmsg_len, err->msg.nlmsg_len, NLM_F_DUMP, 287 err->msg.nlmsg_seq, err->msg.nlmsg_pid, 288 nlh->nlmsg_len, sprintrc(rc)); 289 290 /* error message with room for the error code, a header, and some data */ 291 nlh = nlh0 - sizeof(*err) - 4; 292 nlh->nlmsg_len = NLMSG_HDRLEN + sizeof(*err) + 4; 293 nlh->nlmsg_type = NLMSG_ERROR; 294 nlh->nlmsg_flags = NLM_F_REQUEST; 295 nlh->nlmsg_seq = 0; 296 nlh->nlmsg_pid = 0; 297 err = NLMSG_DATA(nlh); 298 err->error = -13; 299 err->msg.nlmsg_len = NLMSG_HDRLEN + 4; 300 err->msg.nlmsg_type = NLMSG_NOOP; 301 err->msg.nlmsg_flags = NLM_F_DUMP | NLM_F_REQUEST; 302 err->msg.nlmsg_seq = 421; 303 err->msg.nlmsg_pid = 12345; 304 memcpy(NLMSG_DATA(&err->msg), "abcd", 4); 305 306 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 307 printf("sendto(%d, {{len=%u, type=NLMSG_ERROR, flags=NLM_F_REQUEST" 308 ", seq=0, pid=0}, {error=-EACCES" 309 ", msg={{len=%u, type=NLMSG_NOOP, flags=NLM_F_REQUEST|0x%x" 310 ", seq=%u, pid=%u}, \"\\x61\\x62\\x63\\x64\"}}}" 311 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 312 fd, nlh->nlmsg_len, err->msg.nlmsg_len, NLM_F_DUMP, 313 err->msg.nlmsg_seq, err->msg.nlmsg_pid, 314 nlh->nlmsg_len, sprintrc(rc)); 315} 316 317static void 318test_nlmsg_done(const int fd) 319{ 320 struct nlmsghdr *nlh; 321 void *const nlh0 = tail_alloc(NLMSG_HDRLEN); 322 long rc; 323 const int num = 0xfacefeed; 324 325 /* NLMSG_DONE message without enough room for an integer payload */ 326 nlh = nlh0; 327 *nlh = (struct nlmsghdr) { 328 .nlmsg_len = NLMSG_HDRLEN + sizeof(num), 329 .nlmsg_type = NLMSG_DONE, 330 .nlmsg_flags = NLM_F_MULTI 331 }; 332 333 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 334 printf("sendto(%d, {{len=%u, type=NLMSG_DONE, flags=NLM_F_MULTI" 335 ", seq=0, pid=0}, %p}, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 336 fd, nlh->nlmsg_len, nlh0 + NLMSG_HDRLEN, 337 nlh->nlmsg_len, sprintrc(rc)); 338 339 /* NLMSG_DONE message with enough room for an oddly short payload */ 340 nlh->nlmsg_len = NLMSG_HDRLEN + 2; 341 nlh = nlh0 - 2; 342 /* Beware of unaligned access to nlh members. */ 343 memmove(nlh, nlh0, sizeof(*nlh)); 344 memcpy(NLMSG_DATA(nlh), "42", 2); 345 346 rc = sendto(fd, nlh, NLMSG_HDRLEN + 2, MSG_DONTWAIT, NULL, 0); 347 printf("sendto(%d, {{len=%u, type=NLMSG_DONE, flags=NLM_F_MULTI, seq=0" 348 ", pid=0}, \"\\x34\\x32\"}, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 349 fd, NLMSG_HDRLEN + 2, NLMSG_HDRLEN + 2, sprintrc(rc)); 350 351 /* NLMSG_DONE message with enough room for an integer payload */ 352 nlh = nlh0 - sizeof(num); 353 *nlh = (struct nlmsghdr) { 354 .nlmsg_len = NLMSG_HDRLEN + sizeof(num), 355 .nlmsg_type = NLMSG_DONE, 356 .nlmsg_flags = NLM_F_MULTI 357 }; 358 memcpy(NLMSG_DATA(nlh), &num, sizeof(num)); 359 360 rc = sendto(fd, nlh, nlh->nlmsg_len, MSG_DONTWAIT, NULL, 0); 361 printf("sendto(%d, {{len=%u, type=NLMSG_DONE, flags=NLM_F_MULTI" 362 ", seq=0, pid=0}, %d}, %u, MSG_DONTWAIT, NULL, 0) = %s\n", 363 fd, nlh->nlmsg_len, num, nlh->nlmsg_len, sprintrc(rc)); 364} 365 366#if defined NLM_F_CAPPED || defined NLM_F_ACK_TLVS 367static void 368test_ack_flags(const int fd) 369{ 370 long rc; 371 struct nlmsghdr nlh = { 372 .nlmsg_len = sizeof(nlh), 373 .nlmsg_type = NLMSG_ERROR, 374 }; 375 376#ifdef NLM_F_CAPPED 377 nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CAPPED, 378 rc = sendto(fd, &nlh, sizeof(nlh), MSG_DONTWAIT, NULL, 0); 379 printf("sendto(%d, {len=%u, type=NLMSG_ERROR" 380 ", flags=NLM_F_REQUEST|NLM_F_CAPPED, seq=0, pid=0}" 381 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 382 fd, nlh.nlmsg_len, (unsigned) sizeof(nlh), sprintrc(rc)); 383#endif 384 385#ifdef NLM_F_ACK_TLVS 386 nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK_TLVS; 387 rc = sendto(fd, &nlh, sizeof(nlh), MSG_DONTWAIT, NULL, 0); 388 printf("sendto(%d, {len=%u, type=NLMSG_ERROR" 389 ", flags=NLM_F_REQUEST|NLM_F_ACK_TLVS, seq=0, pid=0}" 390 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 391 fd, nlh.nlmsg_len, (unsigned) sizeof(nlh), sprintrc(rc)); 392#endif 393 394#if defined NLM_F_CAPPED && defined NLM_F_ACK_TLVS 395 nlh.nlmsg_flags = NLM_F_REQUEST | NLM_F_CAPPED | NLM_F_ACK_TLVS; 396 rc = sendto(fd, &nlh, sizeof(nlh), MSG_DONTWAIT, NULL, 0); 397 printf("sendto(%d, {len=%u, type=NLMSG_ERROR" 398 ", flags=NLM_F_REQUEST|NLM_F_CAPPED|NLM_F_ACK_TLVS, seq=0, pid=0}" 399 ", %u, MSG_DONTWAIT, NULL, 0) = %s\n", 400 fd, nlh.nlmsg_len, (unsigned) sizeof(nlh), sprintrc(rc)); 401#endif 402} 403#endif 404 405int main(void) 406{ 407 const int fd = create_nl_socket(NETLINK_SOCK_DIAG); 408 409 char *path; 410 if (asprintf(&path, "/proc/self/fd/%u", fd) < 0) 411 perror_msg_and_fail("asprintf"); 412 char buf[256]; 413 if (getxattr(path, "system.sockprotoname", buf, sizeof(buf) - 1) < 0) 414 perror_msg_and_skip("getxattr"); 415 free(path); 416 417 send_query(fd); 418 test_nlmsgerr(fd); 419 test_nlmsg_done(fd); 420#if defined NLM_F_CAPPED || defined NLM_F_ACK_TLVS 421 test_ack_flags(fd); 422#endif 423 424 puts("+++ exited with 0 +++"); 425 return 0; 426} 427 428#else 429 430SKIP_MAIN_UNDEFINED("HAVE_SYS_XATTR_H") 431 432#endif 433