[LTP] [PATCH] syscalls/sendmmsg: add new test

[Steve Muckle]

Test basic functionality of sendmmsg and recvmmsg.

Signed-off-by: Steve Muckle <smuckle@google.com>
---
 runtest/syscalls                              |   2 +
 testcases/kernel/syscalls/sendmmsg/.gitignore |   1 +
 testcases/kernel/syscalls/sendmmsg/Makefile   |   9 ++
 .../kernel/syscalls/sendmmsg/sendmmsg01.c     | 123 ++++++++++++++++++
 4 files changed, 135 insertions(+)
 create mode 100644 testcases/kernel/syscalls/sendmmsg/.gitignore
 create mode 100644 testcases/kernel/syscalls/sendmmsg/Makefile
 create mode 100644 testcases/kernel/syscalls/sendmmsg/sendmmsg01.c

diff --git a/runtest/syscalls b/runtest/syscalls
index b0904086d..742b5bef3 100644
--- a/runtest/syscalls
+++ b/runtest/syscalls
@@ -1095,6 +1095,8 @@ sendfile09_64 sendfile09_64
 sendmsg01 sendmsg01
 sendmsg02 sendmsg02
 
+sendmmsg01 sendmmsg01
+
 sendto01 sendto01
 sendto02 sendto02
 
diff --git a/testcases/kernel/syscalls/sendmmsg/.gitignore b/testcases/kernel/syscalls/sendmmsg/.gitignore
new file mode 100644
index 000000000..b703ececd
--- /dev/null
+++ b/testcases/kernel/syscalls/sendmmsg/.gitignore
@@ -0,0 +1 @@
+sendmmsg01
diff --git a/testcases/kernel/syscalls/sendmmsg/Makefile b/testcases/kernel/syscalls/sendmmsg/Makefile
new file mode 100644
index 000000000..47e063722
--- /dev/null
+++ b/testcases/kernel/syscalls/sendmmsg/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0-or-later
+
+top_srcdir		?= ../../../..
+
+sendmmsg01: CFLAGS+=-pthread
+
+include $(top_srcdir)/include/mk/testcases.mk
+
+include $(top_srcdir)/include/mk/generic_leaf_target.mk
diff --git a/testcases/kernel/syscalls/sendmmsg/sendmmsg01.c b/testcases/kernel/syscalls/sendmmsg/sendmmsg01.c
new file mode 100644
index 000000000..d1bdf40a1
--- /dev/null
+++ b/testcases/kernel/syscalls/sendmmsg/sendmmsg01.c
@@ -0,0 +1,123 @@
+/*
+ * This test is based on source contained in the man pages for sendmmsg and
+ * recvmmsg in release 4.15 of the Linux man-pages project.
+ */
+
+#define _GNU_SOURCE
+#include <netinet/ip.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+
+#include "tst_test.h"
+#include "tst_safe_macros.h"
+#include "tst_safe_pthread.h"
+
+#define BUFSIZE 16
+#define VLEN 2
+
+static void *sender_thread(LTP_ATTRIBUTE_UNUSED void *arg)
+{
+	struct sockaddr_in addr;
+	struct mmsghdr msg[2];
+	struct iovec msg1[2], msg2;
+	int send_sockfd;
+	int retval;
+
+	send_sockfd = SAFE_SOCKET(AF_INET, SOCK_DGRAM, 0);
+
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+	addr.sin_port = htons(1234);
+	SAFE_CONNECT(send_sockfd, (struct sockaddr *) &addr, sizeof(addr));
+
+	memset(msg1, 0, sizeof(msg1));
+	msg1[0].iov_base = "one";
+	msg1[0].iov_len = 3;
+	msg1[1].iov_base = "two";
+	msg1[1].iov_len = 3;
+
+	memset(&msg2, 0, sizeof(msg2));
+	msg2.iov_base = "three";
+	msg2.iov_len = 5;
+
+	memset(msg, 0, sizeof(msg));
+	msg[0].msg_hdr.msg_iov = msg1;
+	msg[0].msg_hdr.msg_iovlen = 2;
+
+	msg[1].msg_hdr.msg_iov = &msg2;
+	msg[1].msg_hdr.msg_iovlen = 1;
+
+	retval = sendmmsg(send_sockfd, msg, 2, 0);
+	if (retval < 0)
+		tst_brk(TFAIL|TTERRNO, "sendmmsg failed");
+
+	return NULL;
+}
+
+
+static void *receiver_thread(LTP_ATTRIBUTE_UNUSED void *arg)
+{
+	int receive_sockfd;
+	struct sockaddr_in addr;
+	struct mmsghdr msgs[VLEN];
+	struct iovec iovecs[VLEN];
+	char bufs[VLEN][BUFSIZE+1];
+	struct timespec timeout;
+	int i, retval;
+
+	receive_sockfd = SAFE_SOCKET(AF_INET, SOCK_DGRAM, 0);
+	addr.sin_family = AF_INET;
+	addr.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
+	addr.sin_port = htons(1234);
+	SAFE_BIND(receive_sockfd, (struct sockaddr *)&addr, sizeof(addr));
+
+	memset(msgs, 0, sizeof(msgs));
+	for (i = 0; i < VLEN; i++) {
+		iovecs[i].iov_base = bufs[i];
+		iovecs[i].iov_len = BUFSIZE;
+		msgs[i].msg_hdr.msg_iov = &iovecs[i];
+		msgs[i].msg_hdr.msg_iovlen = 1;
+	}
+
+	timeout.tv_sec = 1;
+	timeout.tv_nsec = 0;
+
+	retval = recvmmsg(receive_sockfd, msgs, VLEN, 0, &timeout);
+	if (retval == -1)
+		tst_brk(TFAIL | TTERRNO, "recvmmsg failed");
+	if (retval != 2)
+		tst_brk(TFAIL, "Received unexpected number of messages (%d)",
+			retval);
+
+	bufs[0][msgs[0].msg_len] = 0;
+	if (strcmp(bufs[0], "onetwo"))
+		tst_res(TFAIL, "Error in first received message.");
+	else
+		tst_res(TPASS, "First message received successfully.");
+
+	bufs[1][msgs[1].msg_len] = 0;
+	if (strcmp(bufs[1], "three"))
+		tst_res(TFAIL, "Error in second received message.");
+	else
+		tst_res(TPASS, "Second message received successfully.");
+
+	return NULL;
+}
+
+static void run(void)
+{
+	pthread_t sender;
+	pthread_t receiver;
+
+	SAFE_PTHREAD_CREATE(&sender, NULL, sender_thread, NULL);
+	SAFE_PTHREAD_CREATE(&receiver, NULL, receiver_thread, NULL);
+	SAFE_PTHREAD_JOIN(sender, NULL);
+	SAFE_PTHREAD_JOIN(receiver, NULL);
+}
+
+static struct tst_test test = {
+	.test_all = run,
+};
-- 
2.21.0.225.g810b269d1ac-goog