]> git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blame - tools/testing/selftests/bpf/test_sock_addr.c
projects / mirror_ubuntu-eoan-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'omap-for-v5.0/fixes-rc7-signed' of git://git.kernel.org/pub/scm/linux...
[mirror_ubuntu-eoan-kernel.git] / tools / testing / selftests / bpf / test_sock_addr.c
CommitLineData
e50b0a6f
AI		 1// SPDX-License-Identifier: GPL-2.0
2// Copyright (c) 2018 Facebook
3
04b6ab73
AI		 4#define _GNU_SOURCE
5
e50b0a6f
AI		 6#include <stdio.h>
7#include <stdlib.h>
8#include <unistd.h>
9
10#include <arpa/inet.h>
04b6ab73 11#include <netinet/in.h>
e50b0a6f 12#include <sys/types.h>
04b6ab73 13#include <sys/select.h>
e50b0a6f
AI		 14#include <sys/socket.h>
15
16#include <linux/filter.h>
17
18#include <bpf/bpf.h>
622adafb 19#include <bpf/libbpf.h>
e50b0a6f
AI		 20
21#include "cgroup_helpers.h"
0a0a7e00 22#include "bpf_rlimit.h"
aa5f0c96 23#include "bpf_util.h"
e50b0a6f 24
04b6ab73
AI		 25#ifndef ENOTSUPP
26# define ENOTSUPP 524
27#endif
28
e50b0a6f 29#define CG_PATH "/foo"
622adafb
AI		 30#define CONNECT4_PROG_PATH "./connect4_prog.o"
31#define CONNECT6_PROG_PATH "./connect6_prog.o"
04b6ab73
AI		 32#define SENDMSG4_PROG_PATH "./sendmsg4_prog.o"
33#define SENDMSG6_PROG_PATH "./sendmsg6_prog.o"
e50b0a6f
AI		 34
35#define SERV4_IP "192.168.1.254"
36#define SERV4_REWRITE_IP "127.0.0.1"
04b6ab73 37#define SRC4_IP "172.16.0.1"
9be71aa6 38#define SRC4_REWRITE_IP "127.0.0.4"
e50b0a6f
AI		 39#define SERV4_PORT 4040
40#define SERV4_REWRITE_PORT 4444
41
42#define SERV6_IP "face:b00c:1234:5678::abcd"
43#define SERV6_REWRITE_IP "::1"
04b6ab73
AI		 44#define SERV6_V4MAPPED_IP "::ffff:192.168.0.4"
45#define SRC6_IP "::1"
9be71aa6 46#define SRC6_REWRITE_IP "::6"
976b4f3a 47#define WILDCARD6_IP "::"
e50b0a6f
AI		 48#define SERV6_PORT 6060
49#define SERV6_REWRITE_PORT 6666
50
51#define INET_NTOP_BUF 40
52
9be71aa6
AI		 53struct sock_addr_test;
54
55typedef int (*load_fn)(const struct sock_addr_test *test);
e50b0a6f
AI		 56typedef int (*info_fn)(int, struct sockaddr *, socklen_t *);
57
9be71aa6
AI		 58char bpf_log_buf[BPF_LOG_BUF_SIZE];
59
60struct sock_addr_test {
61 const char *descr;
62 /* BPF prog properties */
63 load_fn loadfn;
64 enum bpf_attach_type expected_attach_type;
65 enum bpf_attach_type attach_type;
66 /* Socket properties */
67 int domain;
68 int type;
69 /* IP:port pairs for BPF prog to override */
70 const char *requested_ip;
71 unsigned short requested_port;
72 const char *expected_ip;
73 unsigned short expected_port;
74 const char *expected_src_ip;
75 /* Expected test result */
76 enum {
77 LOAD_REJECT,
78 ATTACH_REJECT,
04b6ab73
AI		 79 SYSCALL_EPERM,
80 SYSCALL_ENOTSUPP,
9be71aa6
AI		 81 SUCCESS,
82 } expected_result;
e50b0a6f
AI		 83};
84
9be71aa6
AI		 85static int bind4_prog_load(const struct sock_addr_test *test);
86static int bind6_prog_load(const struct sock_addr_test *test);
87static int connect4_prog_load(const struct sock_addr_test *test);
88static int connect6_prog_load(const struct sock_addr_test *test);
976b4f3a 89static int sendmsg_allow_prog_load(const struct sock_addr_test *test);
04b6ab73
AI		 90static int sendmsg_deny_prog_load(const struct sock_addr_test *test);
91static int sendmsg4_rw_asm_prog_load(const struct sock_addr_test *test);
92static int sendmsg4_rw_c_prog_load(const struct sock_addr_test *test);
93static int sendmsg6_rw_asm_prog_load(const struct sock_addr_test *test);
94static int sendmsg6_rw_c_prog_load(const struct sock_addr_test *test);
95static int sendmsg6_rw_v4mapped_prog_load(const struct sock_addr_test *test);
976b4f3a 96static int sendmsg6_rw_wildcard_prog_load(const struct sock_addr_test *test);
9be71aa6
AI		 97
98static struct sock_addr_test tests[] = {
99 /* bind */
100 {
101 "bind4: load prog with wrong expected attach type",
102 bind4_prog_load,
103 BPF_CGROUP_INET6_BIND,
104 BPF_CGROUP_INET4_BIND,
105 AF_INET,
106 SOCK_STREAM,
107 NULL,
108 0,
109 NULL,
110 0,
111 NULL,
112 LOAD_REJECT,
113 },
114 {
115 "bind4: attach prog with wrong attach type",
116 bind4_prog_load,
117 BPF_CGROUP_INET4_BIND,
118 BPF_CGROUP_INET6_BIND,
119 AF_INET,
120 SOCK_STREAM,
121 NULL,
122 0,
123 NULL,
124 0,
125 NULL,
126 ATTACH_REJECT,
127 },
128 {
129 "bind4: rewrite IP & TCP port in",
130 bind4_prog_load,
131 BPF_CGROUP_INET4_BIND,
132 BPF_CGROUP_INET4_BIND,
133 AF_INET,
134 SOCK_STREAM,
135 SERV4_IP,
136 SERV4_PORT,
137 SERV4_REWRITE_IP,
138 SERV4_REWRITE_PORT,
139 NULL,
140 SUCCESS,
141 },
142 {
143 "bind4: rewrite IP & UDP port in",
144 bind4_prog_load,
145 BPF_CGROUP_INET4_BIND,
146 BPF_CGROUP_INET4_BIND,
147 AF_INET,
148 SOCK_DGRAM,
149 SERV4_IP,
150 SERV4_PORT,
151 SERV4_REWRITE_IP,
152 SERV4_REWRITE_PORT,
153 NULL,
154 SUCCESS,
155 },
156 {
157 "bind6: load prog with wrong expected attach type",
158 bind6_prog_load,
159 BPF_CGROUP_INET4_BIND,
160 BPF_CGROUP_INET6_BIND,
161 AF_INET6,
162 SOCK_STREAM,
163 NULL,
164 0,
165 NULL,
166 0,
167 NULL,
168 LOAD_REJECT,
169 },
170 {
171 "bind6: attach prog with wrong attach type",
172 bind6_prog_load,
173 BPF_CGROUP_INET6_BIND,
174 BPF_CGROUP_INET4_BIND,
175 AF_INET,
176 SOCK_STREAM,
177 NULL,
178 0,
179 NULL,
180 0,
181 NULL,
182 ATTACH_REJECT,
183 },
184 {
185 "bind6: rewrite IP & TCP port in",
186 bind6_prog_load,
187 BPF_CGROUP_INET6_BIND,
188 BPF_CGROUP_INET6_BIND,
189 AF_INET6,
190 SOCK_STREAM,
191 SERV6_IP,
192 SERV6_PORT,
193 SERV6_REWRITE_IP,
194 SERV6_REWRITE_PORT,
195 NULL,
196 SUCCESS,
197 },
198 {
199 "bind6: rewrite IP & UDP port in",
200 bind6_prog_load,
201 BPF_CGROUP_INET6_BIND,
202 BPF_CGROUP_INET6_BIND,
203 AF_INET6,
204 SOCK_DGRAM,
205 SERV6_IP,
206 SERV6_PORT,
207 SERV6_REWRITE_IP,
208 SERV6_REWRITE_PORT,
209 NULL,
210 SUCCESS,
211 },
212
213 /* connect */
214 {
215 "connect4: load prog with wrong expected attach type",
216 connect4_prog_load,
217 BPF_CGROUP_INET6_CONNECT,
218 BPF_CGROUP_INET4_CONNECT,
219 AF_INET,
220 SOCK_STREAM,
221 NULL,
222 0,
223 NULL,
224 0,
225 NULL,
226 LOAD_REJECT,
227 },
228 {
229 "connect4: attach prog with wrong attach type",
230 connect4_prog_load,
231 BPF_CGROUP_INET4_CONNECT,
232 BPF_CGROUP_INET6_CONNECT,
233 AF_INET,
234 SOCK_STREAM,
235 NULL,
236 0,
237 NULL,
238 0,
239 NULL,
240 ATTACH_REJECT,
241 },
242 {
243 "connect4: rewrite IP & TCP port",
244 connect4_prog_load,
245 BPF_CGROUP_INET4_CONNECT,
246 BPF_CGROUP_INET4_CONNECT,
247 AF_INET,
248 SOCK_STREAM,
249 SERV4_IP,
250 SERV4_PORT,
251 SERV4_REWRITE_IP,
252 SERV4_REWRITE_PORT,
253 SRC4_REWRITE_IP,
254 SUCCESS,
255 },
256 {
257 "connect4: rewrite IP & UDP port",
258 connect4_prog_load,
259 BPF_CGROUP_INET4_CONNECT,
260 BPF_CGROUP_INET4_CONNECT,
261 AF_INET,
262 SOCK_DGRAM,
263 SERV4_IP,
264 SERV4_PORT,
265 SERV4_REWRITE_IP,
266 SERV4_REWRITE_PORT,
267 SRC4_REWRITE_IP,
268 SUCCESS,
269 },
270 {
271 "connect6: load prog with wrong expected attach type",
272 connect6_prog_load,
273 BPF_CGROUP_INET4_CONNECT,
274 BPF_CGROUP_INET6_CONNECT,
275 AF_INET6,
276 SOCK_STREAM,
277 NULL,
278 0,
279 NULL,
280 0,
281 NULL,
282 LOAD_REJECT,
283 },
284 {
285 "connect6: attach prog with wrong attach type",
286 connect6_prog_load,
287 BPF_CGROUP_INET6_CONNECT,
288 BPF_CGROUP_INET4_CONNECT,
289 AF_INET,
290 SOCK_STREAM,
291 NULL,
292 0,
293 NULL,
294 0,
295 NULL,
296 ATTACH_REJECT,
297 },
298 {
299 "connect6: rewrite IP & TCP port",
300 connect6_prog_load,
301 BPF_CGROUP_INET6_CONNECT,
302 BPF_CGROUP_INET6_CONNECT,
303 AF_INET6,
304 SOCK_STREAM,
305 SERV6_IP,
306 SERV6_PORT,
307 SERV6_REWRITE_IP,
308 SERV6_REWRITE_PORT,
309 SRC6_REWRITE_IP,
310 SUCCESS,
311 },
312 {
313 "connect6: rewrite IP & UDP port",
314 connect6_prog_load,
315 BPF_CGROUP_INET6_CONNECT,
316 BPF_CGROUP_INET6_CONNECT,
317 AF_INET6,
318 SOCK_DGRAM,
319 SERV6_IP,
320 SERV6_PORT,
321 SERV6_REWRITE_IP,
322 SERV6_REWRITE_PORT,
323 SRC6_REWRITE_IP,
324 SUCCESS,
325 },
04b6ab73
AI		 326
327 /* sendmsg */
328 {
329 "sendmsg4: load prog with wrong expected attach type",
330 sendmsg4_rw_asm_prog_load,
331 BPF_CGROUP_UDP6_SENDMSG,
332 BPF_CGROUP_UDP4_SENDMSG,
333 AF_INET,
334 SOCK_DGRAM,
335 NULL,
336 0,
337 NULL,
338 0,
339 NULL,
340 LOAD_REJECT,
341 },
342 {
343 "sendmsg4: attach prog with wrong attach type",
344 sendmsg4_rw_asm_prog_load,
345 BPF_CGROUP_UDP4_SENDMSG,
346 BPF_CGROUP_UDP6_SENDMSG,
347 AF_INET,
348 SOCK_DGRAM,
349 NULL,
350 0,
351 NULL,
352 0,
353 NULL,
354 ATTACH_REJECT,
355 },
356 {
357 "sendmsg4: rewrite IP & port (asm)",
358 sendmsg4_rw_asm_prog_load,
359 BPF_CGROUP_UDP4_SENDMSG,
360 BPF_CGROUP_UDP4_SENDMSG,
361 AF_INET,
362 SOCK_DGRAM,
363 SERV4_IP,
364 SERV4_PORT,
365 SERV4_REWRITE_IP,
366 SERV4_REWRITE_PORT,
367 SRC4_REWRITE_IP,
368 SUCCESS,
369 },
370 {
371 "sendmsg4: rewrite IP & port (C)",
372 sendmsg4_rw_c_prog_load,
373 BPF_CGROUP_UDP4_SENDMSG,
374 BPF_CGROUP_UDP4_SENDMSG,
375 AF_INET,
376 SOCK_DGRAM,
377 SERV4_IP,
378 SERV4_PORT,
379 SERV4_REWRITE_IP,
380 SERV4_REWRITE_PORT,
381 SRC4_REWRITE_IP,
382 SUCCESS,
383 },
384 {
385 "sendmsg4: deny call",
386 sendmsg_deny_prog_load,
387 BPF_CGROUP_UDP4_SENDMSG,
388 BPF_CGROUP_UDP4_SENDMSG,
389 AF_INET,
390 SOCK_DGRAM,
391 SERV4_IP,
392 SERV4_PORT,
393 SERV4_REWRITE_IP,
394 SERV4_REWRITE_PORT,
395 SRC4_REWRITE_IP,
396 SYSCALL_EPERM,
397 },
398 {
399 "sendmsg6: load prog with wrong expected attach type",
400 sendmsg6_rw_asm_prog_load,
401 BPF_CGROUP_UDP4_SENDMSG,
402 BPF_CGROUP_UDP6_SENDMSG,
403 AF_INET6,
404 SOCK_DGRAM,
405 NULL,
406 0,
407 NULL,
408 0,
409 NULL,
410 LOAD_REJECT,
411 },
412 {
413 "sendmsg6: attach prog with wrong attach type",
414 sendmsg6_rw_asm_prog_load,
415 BPF_CGROUP_UDP6_SENDMSG,
416 BPF_CGROUP_UDP4_SENDMSG,
417 AF_INET6,
418 SOCK_DGRAM,
419 NULL,
420 0,
421 NULL,
422 0,
423 NULL,
424 ATTACH_REJECT,
425 },
426 {
427 "sendmsg6: rewrite IP & port (asm)",
428 sendmsg6_rw_asm_prog_load,
429 BPF_CGROUP_UDP6_SENDMSG,
430 BPF_CGROUP_UDP6_SENDMSG,
431 AF_INET6,
432 SOCK_DGRAM,
433 SERV6_IP,
434 SERV6_PORT,
435 SERV6_REWRITE_IP,
436 SERV6_REWRITE_PORT,
437 SRC6_REWRITE_IP,
438 SUCCESS,
439 },
440 {
441 "sendmsg6: rewrite IP & port (C)",
442 sendmsg6_rw_c_prog_load,
443 BPF_CGROUP_UDP6_SENDMSG,
444 BPF_CGROUP_UDP6_SENDMSG,
445 AF_INET6,
446 SOCK_DGRAM,
447 SERV6_IP,
448 SERV6_PORT,
449 SERV6_REWRITE_IP,
450 SERV6_REWRITE_PORT,
451 SRC6_REWRITE_IP,
452 SUCCESS,
453 },
454 {
455 "sendmsg6: IPv4-mapped IPv6",
456 sendmsg6_rw_v4mapped_prog_load,
457 BPF_CGROUP_UDP6_SENDMSG,
458 BPF_CGROUP_UDP6_SENDMSG,
459 AF_INET6,
460 SOCK_DGRAM,
461 SERV6_IP,
462 SERV6_PORT,
463 SERV6_REWRITE_IP,
464 SERV6_REWRITE_PORT,
465 SRC6_REWRITE_IP,
466 SYSCALL_ENOTSUPP,
467 },
976b4f3a
AI		 468 {
469 "sendmsg6: set dst IP = [::] (BSD'ism)",
470 sendmsg6_rw_wildcard_prog_load,
471 BPF_CGROUP_UDP6_SENDMSG,
472 BPF_CGROUP_UDP6_SENDMSG,
473 AF_INET6,
474 SOCK_DGRAM,
475 SERV6_IP,
476 SERV6_PORT,
477 SERV6_REWRITE_IP,
478 SERV6_REWRITE_PORT,
479 SRC6_REWRITE_IP,
480 SUCCESS,
481 },
482 {
483 "sendmsg6: preserve dst IP = [::] (BSD'ism)",
484 sendmsg_allow_prog_load,
485 BPF_CGROUP_UDP6_SENDMSG,
486 BPF_CGROUP_UDP6_SENDMSG,
487 AF_INET6,
488 SOCK_DGRAM,
489 WILDCARD6_IP,
490 SERV6_PORT,
491 SERV6_REWRITE_IP,
492 SERV6_PORT,
493 SRC6_IP,
494 SUCCESS,
495 },
04b6ab73
AI		 496 {
497 "sendmsg6: deny call",
498 sendmsg_deny_prog_load,
499 BPF_CGROUP_UDP6_SENDMSG,
500 BPF_CGROUP_UDP6_SENDMSG,
501 AF_INET6,
502 SOCK_DGRAM,
503 SERV6_IP,
504 SERV6_PORT,
505 SERV6_REWRITE_IP,
506 SERV6_REWRITE_PORT,
507 SRC6_REWRITE_IP,
508 SYSCALL_EPERM,
509 },
9be71aa6 510};
e50b0a6f
AI		 511
512static int mk_sockaddr(int domain, const char *ip, unsigned short port,
513 struct sockaddr *addr, socklen_t addr_len)
514{
515 struct sockaddr_in6 *addr6;
516 struct sockaddr_in *addr4;
517
518 if (domain != AF_INET && domain != AF_INET6) {
519 log_err("Unsupported address family");
520 return -1;
521 }
522
523 memset(addr, 0, addr_len);
524
525 if (domain == AF_INET) {
526 if (addr_len < sizeof(struct sockaddr_in))
527 return -1;
528 addr4 = (struct sockaddr_in *)addr;
529 addr4->sin_family = domain;
530 addr4->sin_port = htons(port);
531 if (inet_pton(domain, ip, (void *)&addr4->sin_addr) != 1) {
532 log_err("Invalid IPv4: %s", ip);
533 return -1;
534 }
535 } else if (domain == AF_INET6) {
536 if (addr_len < sizeof(struct sockaddr_in6))
537 return -1;
538 addr6 = (struct sockaddr_in6 *)addr;
539 addr6->sin6_family = domain;
540 addr6->sin6_port = htons(port);
541 if (inet_pton(domain, ip, (void *)&addr6->sin6_addr) != 1) {
542 log_err("Invalid IPv6: %s", ip);
543 return -1;
544 }
545 }
546
547 return 0;
548}
549
9be71aa6
AI		 550static int load_insns(const struct sock_addr_test *test,
551 const struct bpf_insn *insns, size_t insns_cnt)
e50b0a6f
AI		 552{
553 struct bpf_load_program_attr load_attr;
554 int ret;
555
556 memset(&load_attr, 0, sizeof(struct bpf_load_program_attr));
557 load_attr.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR;
9be71aa6 558 load_attr.expected_attach_type = test->expected_attach_type;
e50b0a6f
AI		 559 load_attr.insns = insns;
560 load_attr.insns_cnt = insns_cnt;
561 load_attr.license = "GPL";
562
563 ret = bpf_load_program_xattr(&load_attr, bpf_log_buf, BPF_LOG_BUF_SIZE);
9be71aa6
AI		 564 if (ret < 0 && test->expected_result != LOAD_REJECT) {
565 log_err(">>> Loading program error.\n"
566 ">>> Verifier output:\n%s\n-------\n", bpf_log_buf);
e50b0a6f
AI		 567 }
568
569 return ret;
570}
571
572/* [1] These testing programs try to read different context fields, including
573 * narrow loads of different sizes from user_ip4 and user_ip6, and write to
574 * those allowed to be overridden.
575 *
576 * [2] BPF_LD_IMM64 & BPF_JMP_REG are used below whenever there is a need to
577 * compare a register with unsigned 32bit integer. BPF_JMP_IMM can't be used
578 * in such cases since it accepts only _signed_ 32bit integer as IMM
579 * argument. Also note that BPF_LD_IMM64 contains 2 instructions what matters
580 * to count jumps properly.
581 */
582
9be71aa6 583static int bind4_prog_load(const struct sock_addr_test *test)
e50b0a6f
AI		 584{
585 union {
586 uint8_t u4_addr8[4];
587 uint16_t u4_addr16[2];
588 uint32_t u4_addr32;
589 } ip4;
590 struct sockaddr_in addr4_rw;
591
592 if (inet_pton(AF_INET, SERV4_IP, (void *)&ip4) != 1) {
593 log_err("Invalid IPv4: %s", SERV4_IP);
594 return -1;
595 }
596
597 if (mk_sockaddr(AF_INET, SERV4_REWRITE_IP, SERV4_REWRITE_PORT,
598 (struct sockaddr *)&addr4_rw, sizeof(addr4_rw)) == -1)
599 return -1;
600
601 /* See [1]. */
602 struct bpf_insn insns[] = {
603 BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
604
605 /* if (sk.family == AF_INET && */
606 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
607 offsetof(struct bpf_sock_addr, family)),
e7605475 608 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 24),
e50b0a6f
AI		 609
610 /* (sk.type == SOCK_DGRAM || sk.type == SOCK_STREAM) && */
611 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
612 offsetof(struct bpf_sock_addr, type)),
613 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_DGRAM, 1),
614 BPF_JMP_A(1),
e7605475 615 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_STREAM, 20),
e50b0a6f
AI		 616
617 /* 1st_byte_of_user_ip4 == expected && */
618 BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
619 offsetof(struct bpf_sock_addr, user_ip4)),
e7605475
AI		 620 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[0], 18),
621
622 /* 2nd_byte_of_user_ip4 == expected && */
623 BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
624 offsetof(struct bpf_sock_addr, user_ip4) + 1),
625 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[1], 16),
626
627 /* 3rd_byte_of_user_ip4 == expected && */
628 BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
629 offsetof(struct bpf_sock_addr, user_ip4) + 2),
630 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[2], 14),
631
632 /* 4th_byte_of_user_ip4 == expected && */
633 BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
634 offsetof(struct bpf_sock_addr, user_ip4) + 3),
635 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr8[3], 12),
e50b0a6f
AI		 636
637 /* 1st_half_of_user_ip4 == expected && */
638 BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6,
639 offsetof(struct bpf_sock_addr, user_ip4)),
e7605475
AI		 640 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[0], 10),
641
642 /* 2nd_half_of_user_ip4 == expected && */
643 BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6,
644 offsetof(struct bpf_sock_addr, user_ip4) + 2),
645 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip4.u4_addr16[1], 8),
e50b0a6f
AI		 646
647 /* whole_user_ip4 == expected) { */
648 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
649 offsetof(struct bpf_sock_addr, user_ip4)),
650 BPF_LD_IMM64(BPF_REG_8, ip4.u4_addr32), /* See [2]. */
651 BPF_JMP_REG(BPF_JNE, BPF_REG_7, BPF_REG_8, 4),
652
653 /* user_ip4 = addr4_rw.sin_addr */
654 BPF_MOV32_IMM(BPF_REG_7, addr4_rw.sin_addr.s_addr),
655 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7,
656 offsetof(struct bpf_sock_addr, user_ip4)),
657
658 /* user_port = addr4_rw.sin_port */
659 BPF_MOV32_IMM(BPF_REG_7, addr4_rw.sin_port),
660 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7,
661 offsetof(struct bpf_sock_addr, user_port)),
662 /* } */
663
664 /* return 1 */
665 BPF_MOV64_IMM(BPF_REG_0, 1),
666 BPF_EXIT_INSN(),
667 };
668
9be71aa6 669 return load_insns(test, insns, sizeof(insns) / sizeof(struct bpf_insn));
e50b0a6f
AI		 670}
671
9be71aa6 672static int bind6_prog_load(const struct sock_addr_test *test)
e50b0a6f
AI		 673{
674 struct sockaddr_in6 addr6_rw;
675 struct in6_addr ip6;
676
677 if (inet_pton(AF_INET6, SERV6_IP, (void *)&ip6) != 1) {
678 log_err("Invalid IPv6: %s", SERV6_IP);
679 return -1;
680 }
681
682 if (mk_sockaddr(AF_INET6, SERV6_REWRITE_IP, SERV6_REWRITE_PORT,
683 (struct sockaddr *)&addr6_rw, sizeof(addr6_rw)) == -1)
684 return -1;
685
686 /* See [1]. */
687 struct bpf_insn insns[] = {
688 BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
689
690 /* if (sk.family == AF_INET6 && */
691 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
692 offsetof(struct bpf_sock_addr, family)),
693 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET6, 18),
694
695 /* 5th_byte_of_user_ip6 == expected && */
696 BPF_LDX_MEM(BPF_B, BPF_REG_7, BPF_REG_6,
697 offsetof(struct bpf_sock_addr, user_ip6[1])),
698 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip6.s6_addr[4], 16),
699
700 /* 3rd_half_of_user_ip6 == expected && */
701 BPF_LDX_MEM(BPF_H, BPF_REG_7, BPF_REG_6,
702 offsetof(struct bpf_sock_addr, user_ip6[1])),
703 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, ip6.s6_addr16[2], 14),
704
705 /* last_word_of_user_ip6 == expected) { */
706 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
707 offsetof(struct bpf_sock_addr, user_ip6[3])),
708 BPF_LD_IMM64(BPF_REG_8, ip6.s6_addr32[3]), /* See [2]. */
709 BPF_JMP_REG(BPF_JNE, BPF_REG_7, BPF_REG_8, 10),
710
711
712#define STORE_IPV6_WORD(N) \
713 BPF_MOV32_IMM(BPF_REG_7, addr6_rw.sin6_addr.s6_addr32[N]), \
714 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7, \
715 offsetof(struct bpf_sock_addr, user_ip6[N]))
716
717 /* user_ip6 = addr6_rw.sin6_addr */
718 STORE_IPV6_WORD(0),
719 STORE_IPV6_WORD(1),
720 STORE_IPV6_WORD(2),
721 STORE_IPV6_WORD(3),
722
723 /* user_port = addr6_rw.sin6_port */
724 BPF_MOV32_IMM(BPF_REG_7, addr6_rw.sin6_port),
725 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7,
726 offsetof(struct bpf_sock_addr, user_port)),
727
728 /* } */
729
730 /* return 1 */
731 BPF_MOV64_IMM(BPF_REG_0, 1),
732 BPF_EXIT_INSN(),
733 };
734
9be71aa6 735 return load_insns(test, insns, sizeof(insns) / sizeof(struct bpf_insn));
e50b0a6f
AI		 736}
737
9be71aa6 738static int load_path(const struct sock_addr_test *test, const char *path)
622adafb
AI		 739{
740 struct bpf_prog_load_attr attr;
741 struct bpf_object *obj;
742 int prog_fd;
743
744 memset(&attr, 0, sizeof(struct bpf_prog_load_attr));
745 attr.file = path;
746 attr.prog_type = BPF_PROG_TYPE_CGROUP_SOCK_ADDR;
9be71aa6 747 attr.expected_attach_type = test->expected_attach_type;
622adafb
AI		 748
749 if (bpf_prog_load_xattr(&attr, &obj, &prog_fd)) {
9be71aa6
AI		 750 if (test->expected_result != LOAD_REJECT)
751 log_err(">>> Loading program (%s) error.\n", path);
622adafb
AI		 752 return -1;
753 }
754
755 return prog_fd;
756}
757
9be71aa6 758static int connect4_prog_load(const struct sock_addr_test *test)
622adafb 759{
9be71aa6 760 return load_path(test, CONNECT4_PROG_PATH);
622adafb
AI		 761}
762
9be71aa6 763static int connect6_prog_load(const struct sock_addr_test *test)
622adafb 764{
9be71aa6 765 return load_path(test, CONNECT6_PROG_PATH);
622adafb
AI		 766}
767
976b4f3a
AI		 768static int sendmsg_ret_only_prog_load(const struct sock_addr_test *test,
769 int32_t rc)
04b6ab73
AI		 770{
771 struct bpf_insn insns[] = {
976b4f3a
AI		 772 /* return rc */
773 BPF_MOV64_IMM(BPF_REG_0, rc),
04b6ab73
AI		 774 BPF_EXIT_INSN(),
775 };
776 return load_insns(test, insns, sizeof(insns) / sizeof(struct bpf_insn));
777}
778
976b4f3a
AI		 779static int sendmsg_allow_prog_load(const struct sock_addr_test *test)
780{
781 return sendmsg_ret_only_prog_load(test, /*rc*/ 1);
782}
783
784static int sendmsg_deny_prog_load(const struct sock_addr_test *test)
785{
786 return sendmsg_ret_only_prog_load(test, /*rc*/ 0);
787}
788
04b6ab73
AI		 789static int sendmsg4_rw_asm_prog_load(const struct sock_addr_test *test)
790{
791 struct sockaddr_in dst4_rw_addr;
792 struct in_addr src4_rw_ip;
793
794 if (inet_pton(AF_INET, SRC4_REWRITE_IP, (void *)&src4_rw_ip) != 1) {
795 log_err("Invalid IPv4: %s", SRC4_REWRITE_IP);
796 return -1;
797 }
798
799 if (mk_sockaddr(AF_INET, SERV4_REWRITE_IP, SERV4_REWRITE_PORT,
800 (struct sockaddr *)&dst4_rw_addr,
801 sizeof(dst4_rw_addr)) == -1)
802 return -1;
803
804 struct bpf_insn insns[] = {
805 BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
806
807 /* if (sk.family == AF_INET && */
808 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
809 offsetof(struct bpf_sock_addr, family)),
810 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET, 8),
811
812 /* sk.type == SOCK_DGRAM) { */
813 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
814 offsetof(struct bpf_sock_addr, type)),
815 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, SOCK_DGRAM, 6),
816
817 /* msg_src_ip4 = src4_rw_ip */
818 BPF_MOV32_IMM(BPF_REG_7, src4_rw_ip.s_addr),
819 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7,
820 offsetof(struct bpf_sock_addr, msg_src_ip4)),
821
822 /* user_ip4 = dst4_rw_addr.sin_addr */
823 BPF_MOV32_IMM(BPF_REG_7, dst4_rw_addr.sin_addr.s_addr),
824 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7,
825 offsetof(struct bpf_sock_addr, user_ip4)),
826
827 /* user_port = dst4_rw_addr.sin_port */
828 BPF_MOV32_IMM(BPF_REG_7, dst4_rw_addr.sin_port),
829 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7,
830 offsetof(struct bpf_sock_addr, user_port)),
831 /* } */
832
833 /* return 1 */
834 BPF_MOV64_IMM(BPF_REG_0, 1),
835 BPF_EXIT_INSN(),
836 };
837
838 return load_insns(test, insns, sizeof(insns) / sizeof(struct bpf_insn));
839}
840
841static int sendmsg4_rw_c_prog_load(const struct sock_addr_test *test)
842{
843 return load_path(test, SENDMSG4_PROG_PATH);
844}
845
846static int sendmsg6_rw_dst_asm_prog_load(const struct sock_addr_test *test,
847 const char *rw_dst_ip)
848{
849 struct sockaddr_in6 dst6_rw_addr;
850 struct in6_addr src6_rw_ip;
851
852 if (inet_pton(AF_INET6, SRC6_REWRITE_IP, (void *)&src6_rw_ip) != 1) {
853 log_err("Invalid IPv6: %s", SRC6_REWRITE_IP);
854 return -1;
855 }
856
857 if (mk_sockaddr(AF_INET6, rw_dst_ip, SERV6_REWRITE_PORT,
858 (struct sockaddr *)&dst6_rw_addr,
859 sizeof(dst6_rw_addr)) == -1)
860 return -1;
861
862 struct bpf_insn insns[] = {
863 BPF_MOV64_REG(BPF_REG_6, BPF_REG_1),
864
865 /* if (sk.family == AF_INET6) { */
866 BPF_LDX_MEM(BPF_W, BPF_REG_7, BPF_REG_6,
867 offsetof(struct bpf_sock_addr, family)),
868 BPF_JMP_IMM(BPF_JNE, BPF_REG_7, AF_INET6, 18),
869
870#define STORE_IPV6_WORD_N(DST, SRC, N) \
871 BPF_MOV32_IMM(BPF_REG_7, SRC[N]), \
872 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7, \
873 offsetof(struct bpf_sock_addr, DST[N]))
874
875#define STORE_IPV6(DST, SRC) \
876 STORE_IPV6_WORD_N(DST, SRC, 0), \
877 STORE_IPV6_WORD_N(DST, SRC, 1), \
878 STORE_IPV6_WORD_N(DST, SRC, 2), \
879 STORE_IPV6_WORD_N(DST, SRC, 3)
880
881 STORE_IPV6(msg_src_ip6, src6_rw_ip.s6_addr32),
882 STORE_IPV6(user_ip6, dst6_rw_addr.sin6_addr.s6_addr32),
883
884 /* user_port = dst6_rw_addr.sin6_port */
885 BPF_MOV32_IMM(BPF_REG_7, dst6_rw_addr.sin6_port),
886 BPF_STX_MEM(BPF_W, BPF_REG_6, BPF_REG_7,
887 offsetof(struct bpf_sock_addr, user_port)),
888
889 /* } */
890
891 /* return 1 */
892 BPF_MOV64_IMM(BPF_REG_0, 1),
893 BPF_EXIT_INSN(),
894 };
895
896 return load_insns(test, insns, sizeof(insns) / sizeof(struct bpf_insn));
897}
898
899static int sendmsg6_rw_asm_prog_load(const struct sock_addr_test *test)
900{
901 return sendmsg6_rw_dst_asm_prog_load(test, SERV6_REWRITE_IP);
902}
903
904static int sendmsg6_rw_v4mapped_prog_load(const struct sock_addr_test *test)
905{
906 return sendmsg6_rw_dst_asm_prog_load(test, SERV6_V4MAPPED_IP);
907}
908
976b4f3a
AI		 909static int sendmsg6_rw_wildcard_prog_load(const struct sock_addr_test *test)
910{
911 return sendmsg6_rw_dst_asm_prog_load(test, WILDCARD6_IP);
912}
913
04b6ab73
AI		 914static int sendmsg6_rw_c_prog_load(const struct sock_addr_test *test)
915{
916 return load_path(test, SENDMSG6_PROG_PATH);
917}
918
9be71aa6
AI		 919static int cmp_addr(const struct sockaddr_storage *addr1,
920 const struct sockaddr_storage *addr2, int cmp_port)
e50b0a6f 921{
9be71aa6
AI		 922 const struct sockaddr_in *four1, *four2;
923 const struct sockaddr_in6 *six1, *six2;
924
925 if (addr1->ss_family != addr2->ss_family)
926 return -1;
927
928 if (addr1->ss_family == AF_INET) {
929 four1 = (const struct sockaddr_in *)addr1;
930 four2 = (const struct sockaddr_in *)addr2;
931 return !((four1->sin_port == four2->sin_port || !cmp_port) &&
932 four1->sin_addr.s_addr == four2->sin_addr.s_addr);
933 } else if (addr1->ss_family == AF_INET6) {
934 six1 = (const struct sockaddr_in6 *)addr1;
935 six2 = (const struct sockaddr_in6 *)addr2;
936 return !((six1->sin6_port == six2->sin6_port || !cmp_port) &&
937 !memcmp(&six1->sin6_addr, &six2->sin6_addr,
938 sizeof(struct in6_addr)));
e50b0a6f 939 }
9be71aa6
AI		 940
941 return -1;
942}
943
944static int cmp_sock_addr(info_fn fn, int sock1,
945 const struct sockaddr_storage *addr2, int cmp_port)
946{
947 struct sockaddr_storage addr1;
948 socklen_t len1 = sizeof(addr1);
949
950 memset(&addr1, 0, len1);
951 if (fn(sock1, (struct sockaddr *)&addr1, (socklen_t *)&len1) != 0)
952 return -1;
953
954 return cmp_addr(&addr1, addr2, cmp_port);
955}
956
957static int cmp_local_ip(int sock1, const struct sockaddr_storage *addr2)
958{
959 return cmp_sock_addr(getsockname, sock1, addr2, /*cmp_port*/ 0);
e50b0a6f
AI		 960}
961
9be71aa6 962static int cmp_local_addr(int sock1, const struct sockaddr_storage *addr2)
e50b0a6f 963{
9be71aa6 964 return cmp_sock_addr(getsockname, sock1, addr2, /*cmp_port*/ 1);
e50b0a6f
AI		 965}
966
9be71aa6 967static int cmp_peer_addr(int sock1, const struct sockaddr_storage *addr2)
622adafb 968{
9be71aa6 969 return cmp_sock_addr(getpeername, sock1, addr2, /*cmp_port*/ 1);
622adafb
AI		 970}
971
e50b0a6f
AI		 972static int start_server(int type, const struct sockaddr_storage *addr,
973 socklen_t addr_len)
974{
e50b0a6f
AI		 975 int fd;
976
977 fd = socket(addr->ss_family, type, 0);
978 if (fd == -1) {
979 log_err("Failed to create server socket");
980 goto out;
981 }
982
983 if (bind(fd, (const struct sockaddr *)addr, addr_len) == -1) {
984 log_err("Failed to bind server socket");
985 goto close_out;
986 }
987
988 if (type == SOCK_STREAM) {
989 if (listen(fd, 128) == -1) {
990 log_err("Failed to listen on server socket");
991 goto close_out;
992 }
993 }
994
e50b0a6f
AI		 995 goto out;
996close_out:
997 close(fd);
998 fd = -1;
999out:
1000 return fd;
1001}
1002
622adafb
AI		 1003static int connect_to_server(int type, const struct sockaddr_storage *addr,
1004 socklen_t addr_len)
1005{
1006 int domain;
9be71aa6 1007 int fd = -1;
622adafb
AI		 1008
1009 domain = addr->ss_family;
1010
1011 if (domain != AF_INET && domain != AF_INET6) {
1012 log_err("Unsupported address family");
9be71aa6 1013 goto err;
622adafb
AI		 1014 }
1015
1016 fd = socket(domain, type, 0);
1017 if (fd == -1) {
9be71aa6
AI		 1018 log_err("Failed to create client socket");
1019 goto err;
622adafb
AI		 1020 }
1021
1022 if (connect(fd, (const struct sockaddr *)addr, addr_len) == -1) {
1023 log_err("Fail to connect to server");
1024 goto err;
1025 }
1026
9be71aa6 1027 goto out;
622adafb
AI		 1028err:
1029 close(fd);
9be71aa6
AI		 1030 fd = -1;
1031out:
1032 return fd;
622adafb
AI		 1033}
1034
04b6ab73
AI		 1035int init_pktinfo(int domain, struct cmsghdr *cmsg)
1036{
1037 struct in6_pktinfo *pktinfo6;
1038 struct in_pktinfo *pktinfo4;
1039
1040 if (domain == AF_INET) {
1041 cmsg->cmsg_level = SOL_IP;
1042 cmsg->cmsg_type = IP_PKTINFO;
1043 cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo));
1044 pktinfo4 = (struct in_pktinfo *)CMSG_DATA(cmsg);
1045 memset(pktinfo4, 0, sizeof(struct in_pktinfo));
1046 if (inet_pton(domain, SRC4_IP,
1047 (void *)&pktinfo4->ipi_spec_dst) != 1)
1048 return -1;
1049 } else if (domain == AF_INET6) {
1050 cmsg->cmsg_level = SOL_IPV6;
1051 cmsg->cmsg_type = IPV6_PKTINFO;
1052 cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo));
1053 pktinfo6 = (struct in6_pktinfo *)CMSG_DATA(cmsg);
1054 memset(pktinfo6, 0, sizeof(struct in6_pktinfo));
1055 if (inet_pton(domain, SRC6_IP,
1056 (void *)&pktinfo6->ipi6_addr) != 1)
1057 return -1;
1058 } else {
1059 return -1;
1060 }
1061
1062 return 0;
1063}
1064
a7f7547f
AI		 1065static int sendmsg_to_server(int type, const struct sockaddr_storage *addr,
1066 socklen_t addr_len, int set_cmsg, int flags,
1067 int *syscall_err)
04b6ab73
AI		 1068{
1069 union {
1070 char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))];
1071 struct cmsghdr align;
1072 } control6;
1073 union {
1074 char buf[CMSG_SPACE(sizeof(struct in_pktinfo))];
1075 struct cmsghdr align;
1076 } control4;
1077 struct msghdr hdr;
1078 struct iovec iov;
1079 char data = 'a';
1080 int domain;
1081 int fd = -1;
1082
1083 domain = addr->ss_family;
1084
1085 if (domain != AF_INET && domain != AF_INET6) {
1086 log_err("Unsupported address family");
1087 goto err;
1088 }
1089
a7f7547f 1090 fd = socket(domain, type, 0);
04b6ab73
AI		 1091 if (fd == -1) {
1092 log_err("Failed to create client socket");
1093 goto err;
1094 }
1095
1096 memset(&iov, 0, sizeof(iov));
1097 iov.iov_base = &data;
1098 iov.iov_len = sizeof(data);
1099
1100 memset(&hdr, 0, sizeof(hdr));
1101 hdr.msg_name = (void *)addr;
1102 hdr.msg_namelen = addr_len;
1103 hdr.msg_iov = &iov;
1104 hdr.msg_iovlen = 1;
1105
1106 if (set_cmsg) {
1107 if (domain == AF_INET) {
1108 hdr.msg_control = &control4;
1109 hdr.msg_controllen = sizeof(control4.buf);
1110 } else if (domain == AF_INET6) {
1111 hdr.msg_control = &control6;
1112 hdr.msg_controllen = sizeof(control6.buf);
1113 }
1114 if (init_pktinfo(domain, CMSG_FIRSTHDR(&hdr))) {
1115 log_err("Fail to init pktinfo");
1116 goto err;
1117 }
1118 }
1119
a7f7547f 1120 if (sendmsg(fd, &hdr, flags) != sizeof(data)) {
04b6ab73
AI		 1121 log_err("Fail to send message to server");
1122 *syscall_err = errno;
1123 goto err;
1124 }
1125
1126 goto out;
1127err:
1128 close(fd);
1129 fd = -1;
1130out:
1131 return fd;
1132}
1133
a7f7547f
AI		 1134static int fastconnect_to_server(const struct sockaddr_storage *addr,
1135 socklen_t addr_len)
1136{
1137 int sendmsg_err;
1138
1139 return sendmsg_to_server(SOCK_STREAM, addr, addr_len, /*set_cmsg*/0,
1140 MSG_FASTOPEN, &sendmsg_err);
1141}
1142
04b6ab73
AI		 1143static int recvmsg_from_client(int sockfd, struct sockaddr_storage *src_addr)
1144{
1145 struct timeval tv;
1146 struct msghdr hdr;
1147 struct iovec iov;
1148 char data[64];
1149 fd_set rfds;
1150
1151 FD_ZERO(&rfds);
1152 FD_SET(sockfd, &rfds);
1153
1154 tv.tv_sec = 2;
1155 tv.tv_usec = 0;
1156
1157 if (select(sockfd + 1, &rfds, NULL, NULL, &tv) <= 0 ||
1158 !FD_ISSET(sockfd, &rfds))
1159 return -1;
1160
1161 memset(&iov, 0, sizeof(iov));
1162 iov.iov_base = data;
1163 iov.iov_len = sizeof(data);
1164
1165 memset(&hdr, 0, sizeof(hdr));
1166 hdr.msg_name = src_addr;
1167 hdr.msg_namelen = sizeof(struct sockaddr_storage);
1168 hdr.msg_iov = &iov;
1169 hdr.msg_iovlen = 1;
1170
1171 return recvmsg(sockfd, &hdr, 0);
1172}
1173
9be71aa6
AI		 1174static int init_addrs(const struct sock_addr_test *test,
1175 struct sockaddr_storage *requested_addr,
1176 struct sockaddr_storage *expected_addr,
1177 struct sockaddr_storage *expected_src_addr)
e50b0a6f 1178{
9be71aa6
AI		 1179 socklen_t addr_len = sizeof(struct sockaddr_storage);
1180
1181 if (mk_sockaddr(test->domain, test->expected_ip, test->expected_port,
1182 (struct sockaddr *)expected_addr, addr_len) == -1)
1183 goto err;
1184
1185 if (mk_sockaddr(test->domain, test->requested_ip, test->requested_port,
1186 (struct sockaddr *)requested_addr, addr_len) == -1)
1187 goto err;
1188
1189 if (test->expected_src_ip &&
1190 mk_sockaddr(test->domain, test->expected_src_ip, 0,
1191 (struct sockaddr *)expected_src_addr, addr_len) == -1)
1192 goto err;
1193
1194 return 0;
1195err:
1196 return -1;
e50b0a6f
AI		 1197}
1198
9be71aa6 1199static int run_bind_test_case(const struct sock_addr_test *test)
e50b0a6f 1200{
9be71aa6
AI		 1201 socklen_t addr_len = sizeof(struct sockaddr_storage);
1202 struct sockaddr_storage requested_addr;
1203 struct sockaddr_storage expected_addr;
1204 int clientfd = -1;
e50b0a6f
AI		 1205 int servfd = -1;
1206 int err = 0;
1207
9be71aa6
AI		 1208 if (init_addrs(test, &requested_addr, &expected_addr, NULL))
1209 goto err;
e50b0a6f 1210
9be71aa6 1211 servfd = start_server(test->type, &requested_addr, addr_len);
e50b0a6f
AI		 1212 if (servfd == -1)
1213 goto err;
1214
9be71aa6
AI		 1215 if (cmp_local_addr(servfd, &expected_addr))
1216 goto err;
1217
1218 /* Try to connect to server just in case */
1219 clientfd = connect_to_server(test->type, &expected_addr, addr_len);
1220 if (clientfd == -1)
622adafb
AI		 1221 goto err;
1222
e50b0a6f
AI		 1223 goto out;
1224err:
1225 err = -1;
1226out:
9be71aa6 1227 close(clientfd);
e50b0a6f
AI		 1228 close(servfd);
1229 return err;
1230}
1231
9be71aa6 1232static int run_connect_test_case(const struct sock_addr_test *test)
e50b0a6f 1233{
9be71aa6
AI		 1234 socklen_t addr_len = sizeof(struct sockaddr_storage);
1235 struct sockaddr_storage expected_src_addr;
1236 struct sockaddr_storage requested_addr;
1237 struct sockaddr_storage expected_addr;
1238 int clientfd = -1;
1239 int servfd = -1;
1240 int err = 0;
e50b0a6f 1241
9be71aa6
AI		 1242 if (init_addrs(test, &requested_addr, &expected_addr,
1243 &expected_src_addr))
1244 goto err;
e50b0a6f 1245
9be71aa6
AI		 1246 /* Prepare server to connect to */
1247 servfd = start_server(test->type, &expected_addr, addr_len);
1248 if (servfd == -1)
1249 goto err;
622adafb 1250
9be71aa6
AI		 1251 clientfd = connect_to_server(test->type, &requested_addr, addr_len);
1252 if (clientfd == -1)
1253 goto err;
622adafb 1254
9be71aa6
AI		 1255 /* Make sure src and dst addrs were overridden properly */
1256 if (cmp_peer_addr(clientfd, &expected_addr))
1257 goto err;
e50b0a6f 1258
9be71aa6
AI		 1259 if (cmp_local_ip(clientfd, &expected_src_addr))
1260 goto err;
1261
a7f7547f
AI		 1262 if (test->type == SOCK_STREAM) {
1263 /* Test TCP Fast Open scenario */
1264 clientfd = fastconnect_to_server(&requested_addr, addr_len);
1265 if (clientfd == -1)
1266 goto err;
1267
1268 /* Make sure src and dst addrs were overridden properly */
1269 if (cmp_peer_addr(clientfd, &expected_addr))
1270 goto err;
1271
1272 if (cmp_local_ip(clientfd, &expected_src_addr))
1273 goto err;
1274 }
1275
9be71aa6 1276 goto out;
e50b0a6f 1277err:
9be71aa6
AI		 1278 err = -1;
1279out:
1280 close(clientfd);
1281 close(servfd);
1282 return err;
e50b0a6f
AI		 1283}
1284
04b6ab73
AI		 1285static int run_sendmsg_test_case(const struct sock_addr_test *test)
1286{
1287 socklen_t addr_len = sizeof(struct sockaddr_storage);
1288 struct sockaddr_storage expected_src_addr;
1289 struct sockaddr_storage requested_addr;
1290 struct sockaddr_storage expected_addr;
1291 struct sockaddr_storage real_src_addr;
1292 int clientfd = -1;
1293 int servfd = -1;
1294 int set_cmsg;
1295 int err = 0;
1296
1297 if (test->type != SOCK_DGRAM)
1298 goto err;
1299
1300 if (init_addrs(test, &requested_addr, &expected_addr,
1301 &expected_src_addr))
1302 goto err;
1303
1304 /* Prepare server to sendmsg to */
1305 servfd = start_server(test->type, &expected_addr, addr_len);
1306 if (servfd == -1)
1307 goto err;
1308
1309 for (set_cmsg = 0; set_cmsg <= 1; ++set_cmsg) {
1310 if (clientfd >= 0)
1311 close(clientfd);
1312
a7f7547f
AI		 1313 clientfd = sendmsg_to_server(test->type, &requested_addr,
1314 addr_len, set_cmsg, /*flags*/0,
1315 &err);
04b6ab73
AI		 1316 if (err)
1317 goto out;
1318 else if (clientfd == -1)
1319 goto err;
1320
1321 /* Try to receive message on server instead of using
1322 * getpeername(2) on client socket, to check that client's
1323 * destination address was rewritten properly, since
1324 * getpeername(2) doesn't work with unconnected datagram
1325 * sockets.
1326 *
1327 * Get source address from recvmsg(2) as well to make sure
1328 * source was rewritten properly: getsockname(2) can't be used
1329 * since socket is unconnected and source defined for one
1330 * specific packet may differ from the one used by default and
1331 * returned by getsockname(2).
1332 */
1333 if (recvmsg_from_client(servfd, &real_src_addr) == -1)
1334 goto err;
1335
1336 if (cmp_addr(&real_src_addr, &expected_src_addr, /*cmp_port*/0))
1337 goto err;
1338 }
1339
1340 goto out;
1341err:
1342 err = -1;
1343out:
1344 close(clientfd);
1345 close(servfd);
1346 return err;
1347}
1348
9be71aa6 1349static int run_test_case(int cgfd, const struct sock_addr_test *test)
e50b0a6f 1350{
9be71aa6 1351 int progfd = -1;
e50b0a6f
AI		 1352 int err = 0;
1353
9be71aa6
AI		 1354 printf("Test case: %s .. ", test->descr);
1355
1356 progfd = test->loadfn(test);
1357 if (test->expected_result == LOAD_REJECT && progfd < 0)
1358 goto out;
1359 else if (test->expected_result == LOAD_REJECT || progfd < 0)
1360 goto err;
1361
1362 err = bpf_prog_attach(progfd, cgfd, test->attach_type,
1363 BPF_F_ALLOW_OVERRIDE);
1364 if (test->expected_result == ATTACH_REJECT && err) {
1365 err = 0; /* error was expected, reset it */
1366 goto out;
1367 } else if (test->expected_result == ATTACH_REJECT || err) {
e50b0a6f 1368 goto err;
9be71aa6 1369 }
e50b0a6f 1370
9be71aa6
AI		 1371 switch (test->attach_type) {
1372 case BPF_CGROUP_INET4_BIND:
1373 case BPF_CGROUP_INET6_BIND:
1374 err = run_bind_test_case(test);
1375 break;
1376 case BPF_CGROUP_INET4_CONNECT:
1377 case BPF_CGROUP_INET6_CONNECT:
1378 err = run_connect_test_case(test);
1379 break;
04b6ab73
AI		 1380 case BPF_CGROUP_UDP4_SENDMSG:
1381 case BPF_CGROUP_UDP6_SENDMSG:
1382 err = run_sendmsg_test_case(test);
1383 break;
9be71aa6 1384 default:
e50b0a6f 1385 goto err;
9be71aa6 1386 }
e50b0a6f 1387
04b6ab73
AI		 1388 if (test->expected_result == SYSCALL_EPERM && err == EPERM) {
1389 err = 0; /* error was expected, reset it */
1390 goto out;
1391 }
1392
1393 if (test->expected_result == SYSCALL_ENOTSUPP && err == ENOTSUPP) {
1394 err = 0; /* error was expected, reset it */
1395 goto out;
1396 }
1397
9be71aa6 1398 if (err || test->expected_result != SUCCESS)
e50b0a6f
AI		 1399 goto err;
1400
1401 goto out;
1402err:
1403 err = -1;
1404out:
9be71aa6
AI		 1405 /* Detaching w/o checking return code: best effort attempt. */
1406 if (progfd != -1)
1407 bpf_prog_detach(cgfd, test->attach_type);
1408 close(progfd);
1409 printf("[%s]\n", err ? "FAIL" : "PASS");
e50b0a6f
AI		 1410 return err;
1411}
1412
9be71aa6
AI		 1413static int run_tests(int cgfd)
1414{
1415 int passes = 0;
1416 int fails = 0;
1417 int i;
1418
1419 for (i = 0; i < ARRAY_SIZE(tests); ++i) {
1420 if (run_test_case(cgfd, &tests[i]))
1421 ++fails;
1422 else
1423 ++passes;
1424 }
1425 printf("Summary: %d PASSED, %d FAILED\n", passes, fails);
1426 return fails ? -1 : 0;
1427}
1428
1429int main(int argc, char **argv)
e50b0a6f 1430{
e50b0a6f
AI		 1431 int cgfd = -1;
1432 int err = 0;
1433
9be71aa6
AI		 1434 if (argc < 2) {
1435 fprintf(stderr,
1436 "%s has to be run via %s.sh. Skip direct run.\n",
1437 argv[0], argv[0]);
1438 exit(err);
1439 }
e50b0a6f
AI		 1440
1441 if (setup_cgroup_environment())
1442 goto err;
1443
1444 cgfd = create_and_get_cgroup(CG_PATH);
a8911d6d 1445 if (cgfd < 0)
e50b0a6f
AI		 1446 goto err;
1447
1448 if (join_cgroup(CG_PATH))
1449 goto err;
1450
9be71aa6 1451 if (run_tests(cgfd))
e50b0a6f
AI		 1452 goto err;
1453
1454 goto out;
1455err:
1456 err = -1;
1457out:
1458 close(cgfd);
1459 cleanup_cgroup_environment();
e50b0a6f
AI		 1460 return err;
1461}
Ubuntu Eoan Linux kernel mirror