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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: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Florian Westphal 2021-12-03 14:35:38 -08:00 committed by Jakub Kicinski
parent 3b1e21eb60
commit edb596e80c
1 changed files with 63 additions and 0 deletions
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63
tools/testing/selftests/net/mptcp/mptcp_sockopt.c
View File

@ -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");