tools/testing/selftests/net/psock_lib.h

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/psock_lib.h

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/psock_lib.h
Extension
.h
Size
3454 bytes
Lines
143
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

sizeof(bpf_prog))) {
		perror("setsockopt SO_ATTACH_FILTER");
		exit(1);
	}
}

static __maybe_unused void pair_udp_open(int fds[], uint16_t port)
{
	struct sockaddr_in saddr, daddr;

	fds[0] = socket(PF_INET, SOCK_DGRAM, 0);
	fds[1] = socket(PF_INET, SOCK_DGRAM, 0);
	if (fds[0] == -1 || fds[1] == -1) {
		fprintf(stderr, "ERROR: socket dgram\n");
		exit(1);
	}

	memset(&saddr, 0, sizeof(saddr));
	saddr.sin_family = AF_INET;
	saddr.sin_port = htons(port);
	saddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

	memset(&daddr, 0, sizeof(daddr));
	daddr.sin_family = AF_INET;
	daddr.sin_port = htons(port + 1);
	daddr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);

	/* must bind both to get consistent hash result */
	if (bind(fds[1], (void *) &daddr, sizeof(daddr))) {
		perror("bind");
		exit(1);
	}
	if (bind(fds[0], (void *) &saddr, sizeof(saddr))) {
		perror("bind");
		exit(1);
	}
	if (connect(fds[0], (void *) &daddr, sizeof(daddr))) {
		perror("connect");
		exit(1);
	}
}

static __maybe_unused void pair_udp_send_char(int fds[], int num, char payload)
{
	char buf[DATA_LEN], rbuf[DATA_LEN];

	memset(buf, payload, sizeof(buf));
	while (num--) {
		/* Should really handle EINTR and EAGAIN */
		if (write(fds[0], buf, sizeof(buf)) != sizeof(buf)) {
			fprintf(stderr, "ERROR: send failed left=%d\n", num);
			exit(1);
		}
		if (read(fds[1], rbuf, sizeof(rbuf)) != sizeof(rbuf)) {
			fprintf(stderr, "ERROR: recv failed left=%d\n", num);
			exit(1);
		}
		if (memcmp(buf, rbuf, sizeof(buf))) {
			fprintf(stderr, "ERROR: data failed left=%d\n", num);
			exit(1);
		}
	}
}

static __maybe_unused void pair_udp_send(int fds[], int num)
{
	return pair_udp_send_char(fds, num, DATA_CHAR);
}

static __maybe_unused void pair_udp_close(int fds[])
{
	close(fds[0]);
	close(fds[1]);
}

#endif /* PSOCK_LIB_H */

Annotation

Implementation Notes