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linux-next/tools/testing/vsock/vsock_test.c
Sebastien Boeuf 9de9f7d1cb tools: testing: vsock: Test when server is bound but not listening 
Whenever the server side of vsock is binding to the socket, but not
listening yet, we expect the behavior from the client to be identical to
what happens when the server is not even started.

This new test runs the server side so that it binds to the socket
without ever listening to it. The client side will try to connect and
should receive an ECONNRESET error.

This new test provides a way to validate the previously introduced patch
for making sure the server side will always answer with a RST packet in
case the client requested a new connection.

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2020-02-16 19:01:49 -08:00

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// SPDX-License-Identifier: GPL-2.0-only
/*
* vsock_test - vsock.ko test suite
*
* Copyright (C) 2017 Red Hat, Inc.
*
* Author: Stefan Hajnoczi <stefanha@redhat.com>
*/
#include <getopt.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include <linux/kernel.h>
#include "timeout.h"
#include "control.h"
#include "util.h"
static void test_stream_connection_reset(const struct test_opts *opts)
{
union {
struct sockaddr sa;
struct sockaddr_vm svm;
} addr = {
.svm = {
.svm_family = AF_VSOCK,
.svm_port = 1234,
.svm_cid = opts->peer_cid,
},
};
int ret;
int fd;
fd = socket(AF_VSOCK, SOCK_STREAM, 0);
timeout_begin(TIMEOUT);
do {
ret = connect(fd, &addr.sa, sizeof(addr.svm));
timeout_check("connect");
} while (ret < 0 && errno == EINTR);
timeout_end();
if (ret != -1) {
fprintf(stderr, "expected connect(2) failure, got %d\n", ret);
exit(EXIT_FAILURE);
}
if (errno != ECONNRESET) {
fprintf(stderr, "unexpected connect(2) errno %d\n", errno);
exit(EXIT_FAILURE);
}
close(fd);
}
static void test_stream_bind_only_client(const struct test_opts *opts)
{
union {
struct sockaddr sa;
struct sockaddr_vm svm;
} addr = {
.svm = {
.svm_family = AF_VSOCK,
.svm_port = 1234,
.svm_cid = opts->peer_cid,
},
};
int ret;
int fd;
/* Wait for the server to be ready */
control_expectln("BIND");
fd = socket(AF_VSOCK, SOCK_STREAM, 0);
timeout_begin(TIMEOUT);
do {
ret = connect(fd, &addr.sa, sizeof(addr.svm));
timeout_check("connect");
} while (ret < 0 && errno == EINTR);
timeout_end();
if (ret != -1) {
fprintf(stderr, "expected connect(2) failure, got %d\n", ret);
exit(EXIT_FAILURE);
}
if (errno != ECONNRESET) {
fprintf(stderr, "unexpected connect(2) errno %d\n", errno);
exit(EXIT_FAILURE);
}
/* Notify the server that the client has finished */
control_writeln("DONE");
close(fd);
}
static void test_stream_bind_only_server(const struct test_opts *opts)
{
union {
struct sockaddr sa;
struct sockaddr_vm svm;
} addr = {
.svm = {
.svm_family = AF_VSOCK,
.svm_port = 1234,
.svm_cid = VMADDR_CID_ANY,
},
};
int fd;
fd = socket(AF_VSOCK, SOCK_STREAM, 0);
if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
perror("bind");
exit(EXIT_FAILURE);
}
/* Notify the client that the server is ready */
control_writeln("BIND");
/* Wait for the client to finish */
control_expectln("DONE");
close(fd);
}
static void test_stream_client_close_client(const struct test_opts *opts)
{
int fd;
fd = vsock_stream_connect(opts->peer_cid, 1234);
if (fd < 0) {
perror("connect");
exit(EXIT_FAILURE);
}
send_byte(fd, 1, 0);
close(fd);
}
static void test_stream_client_close_server(const struct test_opts *opts)
{
int fd;
fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
if (fd < 0) {
perror("accept");
exit(EXIT_FAILURE);
}
/* Wait for the remote to close the connection, before check
* -EPIPE error on send.
*/
vsock_wait_remote_close(fd);
send_byte(fd, -EPIPE, 0);
recv_byte(fd, 1, 0);
recv_byte(fd, 0, 0);
close(fd);
}
static void test_stream_server_close_client(const struct test_opts *opts)
{
int fd;
fd = vsock_stream_connect(opts->peer_cid, 1234);
if (fd < 0) {
perror("connect");
exit(EXIT_FAILURE);
}
/* Wait for the remote to close the connection, before check
* -EPIPE error on send.
*/
vsock_wait_remote_close(fd);
send_byte(fd, -EPIPE, 0);
recv_byte(fd, 1, 0);
recv_byte(fd, 0, 0);
close(fd);
}
static void test_stream_server_close_server(const struct test_opts *opts)
{
int fd;
fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
if (fd < 0) {
perror("accept");
exit(EXIT_FAILURE);
}
send_byte(fd, 1, 0);
close(fd);
}
/* With the standard socket sizes, VMCI is able to support about 100
* concurrent stream connections.
*/
#define MULTICONN_NFDS 100
static void test_stream_multiconn_client(const struct test_opts *opts)
{
int fds[MULTICONN_NFDS];
int i;
for (i = 0; i < MULTICONN_NFDS; i++) {
fds[i] = vsock_stream_connect(opts->peer_cid, 1234);
if (fds[i] < 0) {
perror("connect");
exit(EXIT_FAILURE);
}
}
for (i = 0; i < MULTICONN_NFDS; i++) {
if (i % 2)
recv_byte(fds[i], 1, 0);
else
send_byte(fds[i], 1, 0);
}
for (i = 0; i < MULTICONN_NFDS; i++)
close(fds[i]);
}
static void test_stream_multiconn_server(const struct test_opts *opts)
{
int fds[MULTICONN_NFDS];
int i;
for (i = 0; i < MULTICONN_NFDS; i++) {
fds[i] = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
if (fds[i] < 0) {
perror("accept");
exit(EXIT_FAILURE);
}
}
for (i = 0; i < MULTICONN_NFDS; i++) {
if (i % 2)
send_byte(fds[i], 1, 0);
else
recv_byte(fds[i], 1, 0);
}
for (i = 0; i < MULTICONN_NFDS; i++)
close(fds[i]);
}
static void test_stream_msg_peek_client(const struct test_opts *opts)
{
int fd;
fd = vsock_stream_connect(opts->peer_cid, 1234);
if (fd < 0) {
perror("connect");
exit(EXIT_FAILURE);
}
send_byte(fd, 1, 0);
close(fd);
}
static void test_stream_msg_peek_server(const struct test_opts *opts)
{
int fd;
fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, NULL);
if (fd < 0) {
perror("accept");
exit(EXIT_FAILURE);
}
recv_byte(fd, 1, MSG_PEEK);
recv_byte(fd, 1, 0);
close(fd);
}
static struct test_case test_cases[] = {
{
.name = "SOCK_STREAM connection reset",
.run_client = test_stream_connection_reset,
},
{
.name = "SOCK_STREAM bind only",
.run_client = test_stream_bind_only_client,
.run_server = test_stream_bind_only_server,
},
{
.name = "SOCK_STREAM client close",
.run_client = test_stream_client_close_client,
.run_server = test_stream_client_close_server,
},
{
.name = "SOCK_STREAM server close",
.run_client = test_stream_server_close_client,
.run_server = test_stream_server_close_server,
},
{
.name = "SOCK_STREAM multiple connections",
.run_client = test_stream_multiconn_client,
.run_server = test_stream_multiconn_server,
},
{
.name = "SOCK_STREAM MSG_PEEK",
.run_client = test_stream_msg_peek_client,
.run_server = test_stream_msg_peek_server,
},
{},
};
static const char optstring[] = "";
static const struct option longopts[] = {
{
.name = "control-host",
.has_arg = required_argument,
.val = 'H',
},
{
.name = "control-port",
.has_arg = required_argument,
.val = 'P',
},
{
.name = "mode",
.has_arg = required_argument,
.val = 'm',
},
{
.name = "peer-cid",
.has_arg = required_argument,
.val = 'p',
},
{
.name = "list",
.has_arg = no_argument,
.val = 'l',
},
{
.name = "skip",
.has_arg = required_argument,
.val = 's',
},
{
.name = "help",
.has_arg = no_argument,
.val = '?',
},
{},
};
static void usage(void)
{
fprintf(stderr, "Usage: vsock_test [--help] [--control-host=<host>] --control-port=<port> --mode=client|server --peer-cid=<cid> [--list] [--skip=<test_id>]\n"
"\n"
" Server: vsock_test --control-port=1234 --mode=server --peer-cid=3\n"
" Client: vsock_test --control-host=192.168.0.1 --control-port=1234 --mode=client --peer-cid=2\n"
"\n"
"Run vsock.ko tests. Must be launched in both guest\n"
"and host. One side must use --mode=client and\n"
"the other side must use --mode=server.\n"
"\n"
"A TCP control socket connection is used to coordinate tests\n"
"between the client and the server. The server requires a\n"
"listen address and the client requires an address to\n"
"connect to.\n"
"\n"
"The CID of the other side must be given with --peer-cid=<cid>.\n"
"\n"
"Options:\n"
" --help This help message\n"
" --control-host <host> Server IP address to connect to\n"
" --control-port <port> Server port to listen on/connect to\n"
" --mode client|server Server or client mode\n"
" --peer-cid <cid> CID of the other side\n"
" --list List of tests that will be executed\n"
" --skip <test_id> Test ID to skip;\n"
" use multiple --skip options to skip more tests\n"
);
exit(EXIT_FAILURE);
}
int main(int argc, char **argv)
{
const char *control_host = NULL;
const char *control_port = NULL;
struct test_opts opts = {
.mode = TEST_MODE_UNSET,
.peer_cid = VMADDR_CID_ANY,
};
init_signals();
for (;;) {
int opt = getopt_long(argc, argv, optstring, longopts, NULL);
if (opt == -1)
break;
switch (opt) {
case 'H':
control_host = optarg;
break;
case 'm':
if (strcmp(optarg, "client") == 0)
opts.mode = TEST_MODE_CLIENT;
else if (strcmp(optarg, "server") == 0)
opts.mode = TEST_MODE_SERVER;
else {
fprintf(stderr, "--mode must be \"client\" or \"server\"\n");
return EXIT_FAILURE;
}
break;
case 'p':
opts.peer_cid = parse_cid(optarg);
break;
case 'P':
control_port = optarg;
break;
case 'l':
list_tests(test_cases);
break;
case 's':
skip_test(test_cases, ARRAY_SIZE(test_cases) - 1,
optarg);
break;
case '?':
default:
usage();
}
}
if (!control_port)
usage();
if (opts.mode == TEST_MODE_UNSET)
usage();
if (opts.peer_cid == VMADDR_CID_ANY)
usage();
if (!control_host) {
if (opts.mode != TEST_MODE_SERVER)
usage();
control_host = "0.0.0.0";
}
control_init(control_host, control_port,
opts.mode == TEST_MODE_SERVER);
run_tests(test_cases, &opts);
control_cleanup();
return EXIT_SUCCESS;
}
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