Commit edb596e8 authored by Florian Westphal's avatar Florian Westphal Committed by Jakub Kicinski
Browse files

selftests: mptcp: check IP_TOS in/out are the same 



Check that getsockopt(IP_TOS) returns what setsockopt(IP_TOS) did set
right before.

Also check that socklen_t == 0 and -1 input values match those
of normal tcp sockets.

Reviewed-by: default avatarMatthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: default avatarFlorian Westphal <fw@strlen.de>
Signed-off-by: default avatarMat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: default avatarJakub Kicinski <kuba@kernel.org>
parent 3b1e21eb

tools/testing/selftests/net/mptcp/mptcp_sockopt.c

+63 −0
Original line number Diff line number Diff line
@@ -4,6 +4,7 @@ 


#include <assert.h>

#include <errno.h>

#include <fcntl.h>

#include <limits.h>

#include <string.h>

#include <stdarg.h>
@@ -13,6 +14,7 @@ 
#include <stdio.h>

#include <stdlib.h>

#include <strings.h>

#include <time.h>

#include <unistd.h>



#include <sys/socket.h>
@@ -594,6 +596,44 @@ static int server(int pipefd) 
	return 0;

}



static void test_ip_tos_sockopt(int fd)

{

	uint8_t tos_in, tos_out;

	socklen_t s;

	int r;



	tos_in = rand() & 0xfc;

	r = setsockopt(fd, SOL_IP, IP_TOS, &tos_in, sizeof(tos_out));

	if (r != 0)

		die_perror("setsockopt IP_TOS");



	tos_out = 0;

	s = sizeof(tos_out);

	r = getsockopt(fd, SOL_IP, IP_TOS, &tos_out, &s);

	if (r != 0)

		die_perror("getsockopt IP_TOS");



	if (tos_in != tos_out)

		xerror("tos %x != %x socklen_t %d\n", tos_in, tos_out, s);



	if (s != 1)

		xerror("tos should be 1 byte");



	s = 0;

	r = getsockopt(fd, SOL_IP, IP_TOS, &tos_out, &s);

	if (r != 0)

		die_perror("getsockopt IP_TOS 0");

	if (s != 0)

		xerror("expect socklen_t == 0");



	s = -1;

	r = getsockopt(fd, SOL_IP, IP_TOS, &tos_out, &s);

	if (r != -1 && errno != EINVAL)

		die_perror("getsockopt IP_TOS did not indicate -EINVAL");

	if (s != -1)

		xerror("expect socklen_t == -1");

}



static int client(int pipefd)

{

	int fd = -1;
@@ -611,6 +651,8 @@ static int client(int pipefd) 
		xerror("Unknown pf %d\n", pf);

	}



	test_ip_tos_sockopt(fd);



	connect_one_server(fd, pipefd);



	return 0;
@@ -642,6 +684,25 @@ static int rcheck(int wstatus, const char *what) 
	return 111;

}



static void init_rng(void)

{

	int fd = open("/dev/urandom", O_RDONLY);



	if (fd >= 0) {

		unsigned int foo;

		ssize_t ret;



		/* can't fail */

		ret = read(fd, &foo, sizeof(foo));

		assert(ret == sizeof(foo));



		close(fd);

		srand(foo);

	} else {

		srand(time(NULL));

	}

}



int main(int argc, char *argv[])

{

	int e1, e2, wstatus;
@@ -650,6 +711,8 @@ int main(int argc, char *argv[]) 


	parse_opts(argc, argv);



	init_rng();



	e1 = pipe(pipefds);

	if (e1 < 0)

		die_perror("pipe");