[PATCH RFC net-next v5 14/14] test/vsock: add vsock dgram tests

Bobby Eshleman
2023-07-19T00:50:31Z

From: Jiang Wang <jiang.wang@bytedance.com>

This commit adds tests for vsock datagram.

Signed-off-by: Bobby Eshleman <bobby.eshleman@bytedance.com>
Signed-off-by: Jiang Wang <jiang.wang@bytedance.com>
---
tools/testing/vsock/util.c | 141 +++++++-
tools/testing/vsock/util.h | 6 +
tools/testing/vsock/vsock_test.c | 680 +++++++++++++++++++++++++++++++++++++++
3 files changed, 826 insertions(+), 1 deletion(-)

diff --git a/tools/testing/vsock/util.c b/tools/testing/vsock/util.c
index 01b636d3039a..811e70d7cf1e 100644
--- a/tools/testing/vsock/util.c
+++ b/tools/testing/vsock/util.c
@@ -99,7 +99,8 @@ static int vsock_connect(unsigned int cid, unsigned int port, int type)
int ret;
int fd;

- control_expectln("LISTENING");
+ if (type != SOCK_DGRAM)
+ control_expectln("LISTENING");

fd = socket(AF_VSOCK, type, 0);

@@ -130,6 +131,11 @@ int vsock_seqpacket_connect(unsigned int cid, unsigned int port)
return vsock_connect(cid, port, SOCK_SEQPACKET);
}

+int vsock_dgram_connect(unsigned int cid, unsigned int port)
+{
+ return vsock_connect(cid, port, SOCK_DGRAM);
+}
+
/* Listen on <cid, port> and return the first incoming connection. The remote
* address is stored to clientaddrp. clientaddrp may be NULL.
*/
@@ -211,6 +217,34 @@ int vsock_seqpacket_accept(unsigned int cid, unsigned int port,
return vsock_accept(cid, port, clientaddrp, SOCK_SEQPACKET);
}

+int vsock_dgram_bind(unsigned int cid, unsigned int port)
+{
+ union {
+ struct sockaddr sa;
+ struct sockaddr_vm svm;
+ } addr = {
+ .svm = {
+ .svm_family = AF_VSOCK,
+ .svm_port = port,
+ .svm_cid = cid,
+ },
+ };
+ int fd;
+
+ fd = socket(AF_VSOCK, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ exit(EXIT_FAILURE);
+ }
+
+ if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ return fd;
+}
+
/* Transmit one byte and check the return value.
*
* expected_ret:
@@ -260,6 +294,57 @@ void send_byte(int fd, int expected_ret, int flags)
}
}

+/* Transmit one byte and check the return value.
+ *
+ * expected_ret:
+ * <0 Negative errno (for testing errors)
+ * 0 End-of-file
+ * 1 Success
+ */
+void sendto_byte(int fd, const struct sockaddr *dest_addr, int len, int expected_ret,
+ int flags)
+{
+ const uint8_t byte = 'A';
+ ssize_t nwritten;
+
+ timeout_begin(TIMEOUT);
+ do {
+ nwritten = sendto(fd, &byte, sizeof(byte), flags, dest_addr,
+ len);
+ timeout_check("write");
+ } while (nwritten < 0 && errno == EINTR);
+ timeout_end();
+
+ if (expected_ret < 0) {
+ if (nwritten != -1) {
+ fprintf(stderr, "bogus sendto(2) return value %zd\n",
+ nwritten);
+ exit(EXIT_FAILURE);
+ }
+ if (errno != -expected_ret) {
+ perror("write");
+ exit(EXIT_FAILURE);
+ }
+ return;
+ }
+
+ if (nwritten < 0) {
+ perror("write");
+ exit(EXIT_FAILURE);
+ }
+ if (nwritten == 0) {
+ if (expected_ret == 0)
+ return;
+
+ fprintf(stderr, "unexpected EOF while sending byte\n");
+ exit(EXIT_FAILURE);
+ }
+ if (nwritten != sizeof(byte)) {
+ fprintf(stderr, "bogus sendto(2) return value %zd\n", nwritten);
+ exit(EXIT_FAILURE);
+ }
+}
+
/* Receive one byte and check the return value.
*
* expected_ret:
@@ -313,6 +398,60 @@ void recv_byte(int fd, int expected_ret, int flags)
}
}

+/* Receive one byte and check the return value.
+ *
+ * expected_ret:
+ * <0 Negative errno (for testing errors)
+ * 0 End-of-file
+ * 1 Success
+ */
+void recvfrom_byte(int fd, struct sockaddr *src_addr, socklen_t *addrlen,
+ int expected_ret, int flags)
+{
+ uint8_t byte;
+ ssize_t nread;
+
+ timeout_begin(TIMEOUT);
+ do {
+ nread = recvfrom(fd, &byte, sizeof(byte), flags, src_addr, addrlen);
+ timeout_check("read");
+ } while (nread < 0 && errno == EINTR);
+ timeout_end();
+
+ if (expected_ret < 0) {
+ if (nread != -1) {
+ fprintf(stderr, "bogus recvfrom(2) return value %zd\n",
+ nread);
+ exit(EXIT_FAILURE);
+ }
+ if (errno != -expected_ret) {
+ perror("read");
+ exit(EXIT_FAILURE);
+ }
+ return;
+ }
+
+ if (nread < 0) {
+ perror("read");
+ exit(EXIT_FAILURE);
+ }
+ if (nread == 0) {
+ if (expected_ret == 0)
+ return;
+
+ fprintf(stderr, "unexpected EOF while receiving byte\n");
+ exit(EXIT_FAILURE);
+ }
+ if (nread != sizeof(byte)) {
+ fprintf(stderr, "bogus recvfrom(2) return value %zd\n", nread);
+ exit(EXIT_FAILURE);
+ }
+ if (byte != 'A') {
+ fprintf(stderr, "unexpected byte read %c\n", byte);
+ exit(EXIT_FAILURE);
+ }
+}
+
/* Run test cases. The program terminates if a failure occurs. */
void run_tests(const struct test_case *test_cases,
const struct test_opts *opts)
diff --git a/tools/testing/vsock/util.h b/tools/testing/vsock/util.h
index fb99208a95ea..a69e128d120c 100644
--- a/tools/testing/vsock/util.h
+++ b/tools/testing/vsock/util.h
@@ -37,13 +37,19 @@ void init_signals(void);
unsigned int parse_cid(const char *str);
int vsock_stream_connect(unsigned int cid, unsigned int port);
int vsock_seqpacket_connect(unsigned int cid, unsigned int port);
+int vsock_dgram_connect(unsigned int cid, unsigned int port);
int vsock_stream_accept(unsigned int cid, unsigned int port,
struct sockaddr_vm *clientaddrp);
int vsock_seqpacket_accept(unsigned int cid, unsigned int port,
struct sockaddr_vm *clientaddrp);
+int vsock_dgram_bind(unsigned int cid, unsigned int port);
void vsock_wait_remote_close(int fd);
void send_byte(int fd, int expected_ret, int flags);
+void sendto_byte(int fd, const struct sockaddr *dest_addr, int len, int expected_ret,
+ int flags);
void recv_byte(int fd, int expected_ret, int flags);
+void recvfrom_byte(int fd, struct sockaddr *src_addr, socklen_t *addrlen,
+ int expected_ret, int flags);
void run_tests(const struct test_case *test_cases,
const struct test_opts *opts);
void list_tests(const struct test_case *test_cases);
diff --git a/tools/testing/vsock/vsock_test.c b/tools/testing/vsock/vsock_test.c
index ac1bd3ac1533..c9904a3376ce 100644
--- a/tools/testing/vsock/vsock_test.c
+++ b/tools/testing/vsock/vsock_test.c
@@ -13,6 +13,7 @@
#include <string.h>
#include <errno.h>
#include <unistd.h>
+#include <linux/errqueue.h>
#include <linux/kernel.h>
#include <sys/types.h>
#include <sys/socket.h>
@@ -24,6 +25,12 @@
#include "control.h"
#include "util.h"

+#ifndef SOL_VSOCK
+#define SOL_VSOCK 287
+#endif
+
+#define DGRAM_MSG_CNT 16
+
static void test_stream_connection_reset(const struct test_opts *opts)
{
union {
@@ -1053,6 +1060,644 @@ static void test_stream_virtio_skb_merge_server(const struct test_opts *opts)
close(fd);
}

+static void test_dgram_sendto_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 fd;
+
+ /* Wait for the server to be ready */
+ control_expectln("BIND");
+
+ fd = socket(AF_VSOCK, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ exit(EXIT_FAILURE);
+ }
+
+ sendto_byte(fd, &addr.sa, sizeof(addr.svm), 1, 0);
+
+ /* Notify the server that the client has finished */
+ control_writeln("DONE");
+
+ close(fd);
+}
+
+static void test_dgram_sendto_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,
+ },
+ };
+ unsigned long sock_buf_size;
+ int len = sizeof(addr.sa);
+ int fd;
+
+ fd = socket(AF_VSOCK, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ exit(EXIT_FAILURE);
+ }
+
+ if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Set receive buffer to maximum */
+ sock_buf_size = -1;
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
+ &sock_buf_size, sizeof(sock_buf_size))) {
+ perror("setsockopt(SO_RECVBUF)");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Notify the client that the server is ready */
+ control_writeln("BIND");
+
+ recvfrom_byte(fd, &addr.sa, &len, 1, 0);
+
+ /* Wait for the client to finish */
+ control_expectln("DONE");
+
+ close(fd);
+}
+
+static void test_dgram_connect_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_DGRAM, 0);
+ if (fd < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ ret = connect(fd, &addr.sa, sizeof(addr.svm));
+ if (ret < 0) {
+ perror("connect");
+ exit(EXIT_FAILURE);
+ }
+
+ send_byte(fd, 1, 0);
+
+ /* Notify the server that the client has finished */
+ control_writeln("DONE");
+
+ close(fd);
+}
+
+static void test_dgram_connect_server(const struct test_opts *opts)
+{
+ test_dgram_sendto_server(opts);
+}
+
+static void test_dgram_multiconn_sendto_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 fds[MULTICONN_NFDS];
+ int i;
+
+ /* Wait for the server to be ready */
+ control_expectln("BIND");
+
+ for (i = 0; i < MULTICONN_NFDS; i++) {
+ fds[i] = socket(AF_VSOCK, SOCK_DGRAM, 0);
+ if (fds[i] < 0) {
+ perror("socket");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ for (i = 0; i < MULTICONN_NFDS; i++) {
+ sendto_byte(fds[i], &addr.sa, sizeof(addr.svm), 1, 0);
+
+ /* This is here to make explicit the case of the test failing
+ * due to packet loss. The test fails when recv() times out
+ * otherwise, which is much more confusing.
+ */
+ control_expectln("PKTRECV");
+ }
+
+ /* Notify the server that the client has finished */
+ control_writeln("DONE");
+
+ for (i = 0; i < MULTICONN_NFDS; i++)
+ close(fds[i]);
+}
+
+static void test_dgram_multiconn_sendto_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 len = sizeof(addr.sa);
+ int fd;
+ int i;
+
+ fd = socket(AF_VSOCK, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ exit(EXIT_FAILURE);
+ }
+
+ 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");
+
+ for (i = 0; i < MULTICONN_NFDS; i++) {
+ recvfrom_byte(fd, &addr.sa, &len, 1, 0);
+ control_writeln("PKTRECV");
+ }
+
+ /* Wait for the client to finish */
+ control_expectln("DONE");
+
+ close(fd);
+}
+
+static void test_dgram_multiconn_send_client(const struct test_opts *opts)
+{
+ int fds[MULTICONN_NFDS];
+ int i;
+
+ /* Wait for the server to be ready */
+ control_expectln("BIND");
+
+ for (i = 0; i < MULTICONN_NFDS; i++) {
+ fds[i] = vsock_dgram_connect(opts->peer_cid, 1234);
+ if (fds[i] < 0) {
+ perror("connect");
+ exit(EXIT_FAILURE);
+ }
+ }
+
+ for (i = 0; i < MULTICONN_NFDS; i++) {
+ send_byte(fds[i], 1, 0);
+ /* This is here to make explicit the case of the test failing
+ * due to packet loss.
+ */
+ control_expectln("PKTRECV");
+ }
+
+ /* Notify the server that the client has finished */
+ control_writeln("DONE");
+
+ for (i = 0; i < MULTICONN_NFDS; i++)
+ close(fds[i]);
+}
+
+static void test_dgram_multiconn_send_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,
+ },
+ };
+ unsigned long sock_buf_size;
+ int fd;
+ int i;
+
+ fd = socket(AF_VSOCK, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ perror("socket");
+ exit(EXIT_FAILURE);
+ }
+
+ if (bind(fd, &addr.sa, sizeof(addr.svm)) < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Set receive buffer to maximum */
+ sock_buf_size = -1;
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
+ &sock_buf_size, sizeof(sock_buf_size))) {
+ perror("setsockopt(SO_RECVBUF)");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Notify the client that the server is ready */
+ control_writeln("BIND");
+
+ for (i = 0; i < MULTICONN_NFDS; i++) {
+ recv_byte(fd, 1, 0);
+ control_writeln("PKTRECV");
+ }
+
+ /* Wait for the client to finish */
+ control_expectln("DONE");
+
+ close(fd);
+}
+
+/*
+ * This test is similar to the seqpacket msg bounds tests, but it is unreliable
+ * because it may also fail in the unlikely case that packets are dropped.
+ */
+static void test_dgram_bounds_unreliable_client(const struct test_opts *opts)
+{
+ unsigned long recv_buf_size;
+ unsigned long *hashes;
+ int page_size;
+ int fd;
+ int i;
+
+ fd = vsock_dgram_connect(opts->peer_cid, 1234);
+ if (fd < 0) {
+ perror("connect");
+ exit(EXIT_FAILURE);
+ }
+
+ hashes = malloc(DGRAM_MSG_CNT * sizeof(unsigned long));
+ if (!hashes) {
+ perror("malloc");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Let the server know the client is ready */
+ control_writeln("CLNTREADY");
+
+ /* Wait, until receiver sets buffer size. */
+ control_expectln("SRVREADY");
+
+ recv_buf_size = control_readulong();
+
+ page_size = getpagesize();
+
+ for (i = 0; i < DGRAM_MSG_CNT; i++) {
+ ssize_t send_size;
+ size_t buf_size;
+ void *buf;
+
+ /* Use "small" buffers and "big" buffers. */
+ if (opts->peer_cid <= VMADDR_CID_HOST && (i & 1))
+ buf_size = page_size +
+ (rand() % (MAX_MSG_SIZE - page_size));
+ else
+ buf_size = 1 + (rand() % page_size);
+
+ buf_size = min(buf_size, recv_buf_size);
+
+ buf = malloc(buf_size);
+
+ if (!buf) {
+ perror("malloc");
+ exit(EXIT_FAILURE);
+ }
+
+ memset(buf, rand() & 0xff, buf_size);
+
+ send_size = send(fd, buf, buf_size, 0);
+ if (send_size < 0) {
+ perror("send");
+ exit(EXIT_FAILURE);
+ }
+
+ if (send_size != buf_size) {
+ fprintf(stderr, "Invalid send size\n");
+ exit(EXIT_FAILURE);
+ }
+
+ /* In theory the implementation isn't required to transmit
+ * these packets in order, so we use this PKTSENT/PKTRECV
+ * message sequence so that server and client coordinate
+ * sending and receiving one packet at a time. The client sends
+ * a packet and waits until it has been received before sending
+ * another.
+ *
+ * Also in theory these packets can be lost and the test will
+ * fail for that reason.
+ */
+ control_writeln("PKTSENT");
+ control_expectln("PKTRECV");
+
+ /* Send the server a hash of the packet */
+ hashes[i] = hash_djb2(buf, buf_size);
+ free(buf);
+ }
+
+ control_writeln("SENDDONE");
+ close(fd);
+
+ for (i = 0; i < DGRAM_MSG_CNT; i++) {
+ if (hashes[i] != control_readulong())
+ fprintf(stderr, "broken dgram message bounds or packet loss\n");
+ }
+ free(hashes);
+}
+
+static void test_dgram_bounds_unreliable_server(const struct test_opts *opts)
+{
+ unsigned long hashes[DGRAM_MSG_CNT];
+ unsigned long sock_buf_size;
+ struct msghdr msg = {0};
+ struct iovec iov = {0};
+ char buf[MAX_MSG_SIZE];
+ socklen_t len;
+ int fd;
+ int i;
+
+ fd = vsock_dgram_bind(VMADDR_CID_ANY, 1234);
+ if (fd < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Set receive buffer to maximum */
+ sock_buf_size = -1;
+ if (setsockopt(fd, SOL_SOCKET, SO_RCVBUF,
+ &sock_buf_size, sizeof(sock_buf_size))) {
+ perror("setsockopt(SO_RECVBUF)");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Retrieve the receive buffer size */
+ len = sizeof(sock_buf_size);
+ if (getsockopt(fd, SOL_SOCKET, SO_RCVBUF,
+ &sock_buf_size, &len)) {
+ perror("getsockopt(SO_RECVBUF)");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Client ready to receive parameters */
+ control_expectln("CLNTREADY");
+
+ /* Ready to receive data. */
+ control_writeln("SRVREADY");
+
+ if (opts->peer_cid > VMADDR_CID_HOST)
+ control_writeulong(sock_buf_size);
+ else
+ control_writeulong(getpagesize());
+
+ iov.iov_base = buf;
+ iov.iov_len = sizeof(buf);
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+
+ for (i = 0; i < DGRAM_MSG_CNT; i++) {
+ ssize_t recv_size;
+
+ control_expectln("PKTSENT");
+ recv_size = recvmsg(fd, &msg, 0);
+ control_writeln("PKTRECV");
+
+ if (!recv_size)
+ break;
+
+ if (recv_size < 0) {
+ perror("recvmsg");
+ exit(EXIT_FAILURE);
+ }
+
+ hashes[i] = hash_djb2(msg.msg_iov[0].iov_base, recv_size);
+ }
+
+ control_expectln("SENDDONE");
+
+ close(fd);
+
+ for (i = 0; i < DGRAM_MSG_CNT; i++)
+ control_writeulong(hashes[i]);
+}
+
+#define POLL_TIMEOUT_MS 1000
+void vsock_recv_error(int fd)
+{
+ struct sock_extended_err *serr;
+ struct msghdr msg = { 0 };
+ struct pollfd fds = { 0 };
+ char cmsg_data[128];
+ struct cmsghdr *cm;
+ ssize_t res;
+
+ fds.fd = fd;
+ fds.events = 0;
+
+ if (poll(&fds, 1, POLL_TIMEOUT_MS) < 0) {
+ perror("poll");
+ exit(EXIT_FAILURE);
+ }
+
+ if (!(fds.revents & POLLERR)) {
+ fprintf(stderr, "POLLERR expected\n");
+ exit(EXIT_FAILURE);
+ }
+
+ msg.msg_control = cmsg_data;
+ msg.msg_controllen = sizeof(cmsg_data);
+
+ res = recvmsg(fd, &msg, MSG_ERRQUEUE);
+ if (res) {
+ fprintf(stderr, "failed to read error queue: %zi\n", res);
+ exit(EXIT_FAILURE);
+ }
+
+ cm = CMSG_FIRSTHDR(&msg);
+ if (!cm) {
+ fprintf(stderr, "cmsg: no cmsg\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (cm->cmsg_level != SOL_VSOCK) {
+ fprintf(stderr, "cmsg: unexpected 'cmsg_level'\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (cm->cmsg_type != 0) {
+ fprintf(stderr, "cmsg: unexpected 'cmsg_type'\n");
+ exit(EXIT_FAILURE);
+ }
+
+ serr = (void *)CMSG_DATA(cm);
+ if (serr->ee_origin != 0) {
+ fprintf(stderr, "serr: unexpected 'ee_origin'\n");
+ exit(EXIT_FAILURE);
+ }
+
+ if (serr->ee_errno != EHOSTUNREACH) {
+ fprintf(stderr, "serr: wrong error code: %u\n", serr->ee_errno);
+ exit(EXIT_FAILURE);
+ }
+}
+
+/*
+ * Attempt to send a packet larger than the client's RX buffer. Test that the
+ * packet was dropped and that there is an error in the error queue.
+ */
+static void test_dgram_drop_big_packets_server(const struct test_opts *opts)
+{
+ unsigned long client_rx_buf_size;
+ size_t buf_size;
+ void *buf;
+ int fd;
+
+ if (opts->peer_cid <= VMADDR_CID_HOST) {
+ printf("The server's peer must be a guest (not CID %u), skipped...\n",
+ opts->peer_cid);
+ return;
+ }
+
+ /* Wait for the server to be ready */
+ control_expectln("READY");
+
+ fd = vsock_dgram_connect(opts->peer_cid, 1234);
+ if (fd < 0) {
+ perror("connect");
+ exit(EXIT_FAILURE);
+ }
+
+ client_rx_buf_size = control_readulong();
+
+ buf_size = client_rx_buf_size + 1;
+ buf = malloc(buf_size);
+ if (!buf) {
+ perror("malloc");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Even though the buffer is exceeded, the send() should still succeed. */
+ if (send(fd, buf, buf_size, 0) < 0) {
+ perror("send");
+ exit(EXIT_FAILURE);
+ }
+
+ vsock_recv_error(fd);
+
+ /* Notify the server that the client has finished */
+ control_writeln("DONE");
+
+ close(fd);
+}
+
+static void test_dgram_drop_big_packets_client(const struct test_opts *opts)
+{
+ unsigned long buf_size = getpagesize();
+
+ if (opts->peer_cid > VMADDR_CID_HOST) {
+ printf("The client's peer must be the host (not CID %u), skipped...\n",
+ opts->peer_cid);
+ return;
+ }
+
+ control_writeln("READY");
+ control_writeulong(buf_size);
+ control_expectln("DONE");
+}
+
+static void test_stream_dgram_address_collision_client(const struct test_opts *opts)
+{
+ int dgram_fd, stream_fd;
+
+ stream_fd = vsock_stream_connect(opts->peer_cid, 1234);
+ if (stream_fd < 0) {
+ perror("connect");
+ exit(EXIT_FAILURE);
+ }
+
+ /* This simply tests if connect() causes address collision client-side.
+ * Keep in mind that there is no exchange of packets with the
+ * bound socket on the server.
+ */
+ dgram_fd = vsock_dgram_connect(opts->peer_cid, 1234);
+ if (dgram_fd < 0) {
+ perror("connect");
+ exit(EXIT_FAILURE);
+ }
+
+ close(stream_fd);
+ close(dgram_fd);
+
+ /* Notify the server that the client has finished */
+ control_writeln("DONE");
+}
+
+static void test_stream_dgram_address_collision_server(const struct test_opts *opts)
+{
+ int dgram_fd, stream_fd;
+ struct sockaddr_vm addr;
+ socklen_t addrlen;
+
+ stream_fd = vsock_stream_accept(VMADDR_CID_ANY, 1234, 0);
+ if (stream_fd < 0) {
+ perror("accept");
+ exit(EXIT_FAILURE);
+ }
+
+ /* Retrieve the CID/port for re-use. */
+ addrlen = sizeof(addr);
+ if (getsockname(stream_fd, (struct sockaddr *)&addr, &addrlen)) {
+ perror("getsockname");
+ exit(EXIT_FAILURE);
+ }
+
+ /* See not in the client function about the pairwise connect call. */
+ dgram_fd = vsock_dgram_bind(addr.svm_cid, addr.svm_port);
+ if (dgram_fd < 0) {
+ perror("bind");
+ exit(EXIT_FAILURE);
+ }
+
+ control_expectln("DONE");
+
+ close(stream_fd);
+ close(dgram_fd);
+}
+
static struct test_case test_cases[] = {
{
.name = "SOCK_STREAM connection reset",
@@ -1128,6 +1773,41 @@ static struct test_case test_cases[] = {
.run_client = test_stream_virtio_skb_merge_client,
.run_server = test_stream_virtio_skb_merge_server,
},
+ {
+ .name = "SOCK_DGRAM client sendto",
+ .run_client = test_dgram_sendto_client,
+ .run_server = test_dgram_sendto_server,
+ },
+ {
+ .name = "SOCK_DGRAM client connect",
+ .run_client = test_dgram_connect_client,
+ .run_server = test_dgram_connect_server,
+ },
+ {
+ .name = "SOCK_DGRAM multiple connections using sendto",
+ .run_client = test_dgram_multiconn_sendto_client,
+ .run_server = test_dgram_multiconn_sendto_server,
+ },
+ {
+ .name = "SOCK_DGRAM multiple connections using send",
+ .run_client = test_dgram_multiconn_send_client,
+ .run_server = test_dgram_multiconn_send_server,
+ },
+ {
+ .name = "SOCK_DGRAM msg bounds unreliable",
+ .run_client = test_dgram_bounds_unreliable_client,
+ .run_server = test_dgram_bounds_unreliable_server,
+ },
+ {
+ .name = "SOCK_DGRAM drop big packets",
+ .run_client = test_dgram_drop_big_packets_client,
+ .run_server = test_dgram_drop_big_packets_server,
+ },
+ {
+ .name = "SOCK_STREAM and SOCK_DGRAM address collision",
+ .run_client = test_stream_dgram_address_collision_client,
+ .run_server = test_stream_dgram_address_collision_server,
+ },
{},
};

--
2.30.2