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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 | #ifndef __SOCKMAP_HELPERS__ #define __SOCKMAP_HELPERS__ #include <linux/vm_sockets.h> #define IO_TIMEOUT_SEC 30 #define MAX_STRERR_LEN 256 #define MAX_TEST_NAME 80 /* workaround for older vm_sockets.h */ #ifndef VMADDR_CID_LOCAL #define VMADDR_CID_LOCAL 1 #endif #define __always_unused __attribute__((__unused__)) #define _FAIL(errnum, fmt...) \ ({ \ error_at_line(0, (errnum), __func__, __LINE__, fmt); \ CHECK_FAIL(true); \ }) #define FAIL(fmt...) _FAIL(0, fmt) #define FAIL_ERRNO(fmt...) _FAIL(errno, fmt) #define FAIL_LIBBPF(err, msg) \ ({ \ char __buf[MAX_STRERR_LEN]; \ libbpf_strerror((err), __buf, sizeof(__buf)); \ FAIL("%s: %s", (msg), __buf); \ }) /* Wrappers that fail the test on error and report it. */ #define xaccept_nonblock(fd, addr, len) \ ({ \ int __ret = \ accept_timeout((fd), (addr), (len), IO_TIMEOUT_SEC); \ if (__ret == -1) \ FAIL_ERRNO("accept"); \ __ret; \ }) #define xbind(fd, addr, len) \ ({ \ int __ret = bind((fd), (addr), (len)); \ if (__ret == -1) \ FAIL_ERRNO("bind"); \ __ret; \ }) #define xclose(fd) \ ({ \ int __ret = close((fd)); \ if (__ret == -1) \ FAIL_ERRNO("close"); \ __ret; \ }) #define xconnect(fd, addr, len) \ ({ \ int __ret = connect((fd), (addr), (len)); \ if (__ret == -1) \ FAIL_ERRNO("connect"); \ __ret; \ }) #define xgetsockname(fd, addr, len) \ ({ \ int __ret = getsockname((fd), (addr), (len)); \ if (__ret == -1) \ FAIL_ERRNO("getsockname"); \ __ret; \ }) #define xgetsockopt(fd, level, name, val, len) \ ({ \ int __ret = getsockopt((fd), (level), (name), (val), (len)); \ if (__ret == -1) \ FAIL_ERRNO("getsockopt(" #name ")"); \ __ret; \ }) #define xlisten(fd, backlog) \ ({ \ int __ret = listen((fd), (backlog)); \ if (__ret == -1) \ FAIL_ERRNO("listen"); \ __ret; \ }) #define xsetsockopt(fd, level, name, val, len) \ ({ \ int __ret = setsockopt((fd), (level), (name), (val), (len)); \ if (__ret == -1) \ FAIL_ERRNO("setsockopt(" #name ")"); \ __ret; \ }) #define xsend(fd, buf, len, flags) \ ({ \ ssize_t __ret = send((fd), (buf), (len), (flags)); \ if (__ret == -1) \ FAIL_ERRNO("send"); \ __ret; \ }) #define xrecv_nonblock(fd, buf, len, flags) \ ({ \ ssize_t __ret = recv_timeout((fd), (buf), (len), (flags), \ IO_TIMEOUT_SEC); \ if (__ret == -1) \ FAIL_ERRNO("recv"); \ __ret; \ }) #define xsocket(family, sotype, flags) \ ({ \ int __ret = socket(family, sotype, flags); \ if (__ret == -1) \ FAIL_ERRNO("socket"); \ __ret; \ }) #define xbpf_map_delete_elem(fd, key) \ ({ \ int __ret = bpf_map_delete_elem((fd), (key)); \ if (__ret < 0) \ FAIL_ERRNO("map_delete"); \ __ret; \ }) #define xbpf_map_lookup_elem(fd, key, val) \ ({ \ int __ret = bpf_map_lookup_elem((fd), (key), (val)); \ if (__ret < 0) \ FAIL_ERRNO("map_lookup"); \ __ret; \ }) #define xbpf_map_update_elem(fd, key, val, flags) \ ({ \ int __ret = bpf_map_update_elem((fd), (key), (val), (flags)); \ if (__ret < 0) \ FAIL_ERRNO("map_update"); \ __ret; \ }) #define xbpf_prog_attach(prog, target, type, flags) \ ({ \ int __ret = \ bpf_prog_attach((prog), (target), (type), (flags)); \ if (__ret < 0) \ FAIL_ERRNO("prog_attach(" #type ")"); \ __ret; \ }) #define xbpf_prog_detach2(prog, target, type) \ ({ \ int __ret = bpf_prog_detach2((prog), (target), (type)); \ if (__ret < 0) \ FAIL_ERRNO("prog_detach2(" #type ")"); \ __ret; \ }) #define xpthread_create(thread, attr, func, arg) \ ({ \ int __ret = pthread_create((thread), (attr), (func), (arg)); \ errno = __ret; \ if (__ret) \ FAIL_ERRNO("pthread_create"); \ __ret; \ }) #define xpthread_join(thread, retval) \ ({ \ int __ret = pthread_join((thread), (retval)); \ errno = __ret; \ if (__ret) \ FAIL_ERRNO("pthread_join"); \ __ret; \ }) static inline int poll_connect(int fd, unsigned int timeout_sec) { struct timeval timeout = { .tv_sec = timeout_sec }; fd_set wfds; int r, eval; socklen_t esize = sizeof(eval); FD_ZERO(&wfds); FD_SET(fd, &wfds); r = select(fd + 1, NULL, &wfds, NULL, &timeout); if (r == 0) errno = ETIME; if (r != 1) return -1; if (getsockopt(fd, SOL_SOCKET, SO_ERROR, &eval, &esize) < 0) return -1; if (eval != 0) { errno = eval; return -1; } return 0; } static inline int poll_read(int fd, unsigned int timeout_sec) { struct timeval timeout = { .tv_sec = timeout_sec }; fd_set rfds; int r; FD_ZERO(&rfds); FD_SET(fd, &rfds); r = select(fd + 1, &rfds, NULL, NULL, &timeout); if (r == 0) errno = ETIME; return r == 1 ? 0 : -1; } static inline int accept_timeout(int fd, struct sockaddr *addr, socklen_t *len, unsigned int timeout_sec) { if (poll_read(fd, timeout_sec)) return -1; return accept(fd, addr, len); } static inline int recv_timeout(int fd, void *buf, size_t len, int flags, unsigned int timeout_sec) { if (poll_read(fd, timeout_sec)) return -1; return recv(fd, buf, len, flags); } static inline void init_addr_loopback4(struct sockaddr_storage *ss, socklen_t *len) { struct sockaddr_in *addr4 = memset(ss, 0, sizeof(*ss)); addr4->sin_family = AF_INET; addr4->sin_port = 0; addr4->sin_addr.s_addr = htonl(INADDR_LOOPBACK); *len = sizeof(*addr4); } static inline void init_addr_loopback6(struct sockaddr_storage *ss, socklen_t *len) { struct sockaddr_in6 *addr6 = memset(ss, 0, sizeof(*ss)); addr6->sin6_family = AF_INET6; addr6->sin6_port = 0; addr6->sin6_addr = in6addr_loopback; *len = sizeof(*addr6); } static inline void init_addr_loopback_vsock(struct sockaddr_storage *ss, socklen_t *len) { struct sockaddr_vm *addr = memset(ss, 0, sizeof(*ss)); addr->svm_family = AF_VSOCK; addr->svm_port = VMADDR_PORT_ANY; addr->svm_cid = VMADDR_CID_LOCAL; *len = sizeof(*addr); } static inline void init_addr_loopback(int family, struct sockaddr_storage *ss, socklen_t *len) { switch (family) { case AF_INET: init_addr_loopback4(ss, len); return; case AF_INET6: init_addr_loopback6(ss, len); return; case AF_VSOCK: init_addr_loopback_vsock(ss, len); return; default: FAIL("unsupported address family %d", family); } } static inline struct sockaddr *sockaddr(struct sockaddr_storage *ss) { return (struct sockaddr *)ss; } static inline int add_to_sockmap(int sock_mapfd, int fd1, int fd2) { u64 value; u32 key; int err; key = 0; value = fd1; err = xbpf_map_update_elem(sock_mapfd, &key, &value, BPF_NOEXIST); if (err) return err; key = 1; value = fd2; return xbpf_map_update_elem(sock_mapfd, &key, &value, BPF_NOEXIST); } static inline int create_pair(int s, int family, int sotype, int *c, int *p) { struct sockaddr_storage addr; socklen_t len; int err = 0; len = sizeof(addr); err = xgetsockname(s, sockaddr(&addr), &len); if (err) return err; *c = xsocket(family, sotype, 0); if (*c < 0) return errno; err = xconnect(*c, sockaddr(&addr), len); if (err) { err = errno; goto close_cli0; } *p = xaccept_nonblock(s, NULL, NULL); if (*p < 0) { err = errno; goto close_cli0; } return err; close_cli0: close(*c); return err; } static inline int create_socket_pairs(int s, int family, int sotype, int *c0, int *c1, int *p0, int *p1) { int err; err = create_pair(s, family, sotype, c0, p0); if (err) return err; err = create_pair(s, family, sotype, c1, p1); if (err) { close(*c0); close(*p0); } return err; } static inline int enable_reuseport(int s, int progfd) { int err, one = 1; err = xsetsockopt(s, SOL_SOCKET, SO_REUSEPORT, &one, sizeof(one)); if (err) return -1; err = xsetsockopt(s, SOL_SOCKET, SO_ATTACH_REUSEPORT_EBPF, &progfd, sizeof(progfd)); if (err) return -1; return 0; } static inline int socket_loopback_reuseport(int family, int sotype, int progfd) { struct sockaddr_storage addr; socklen_t len = 0; int err, s; init_addr_loopback(family, &addr, &len); s = xsocket(family, sotype, 0); if (s == -1) return -1; if (progfd >= 0) enable_reuseport(s, progfd); err = xbind(s, sockaddr(&addr), len); if (err) goto close; if (sotype & SOCK_DGRAM) return s; err = xlisten(s, SOMAXCONN); if (err) goto close; return s; close: xclose(s); return -1; } static inline int socket_loopback(int family, int sotype) { return socket_loopback_reuseport(family, sotype, -1); } #endif // __SOCKMAP_HELPERS__ |