1 // SPDX-License-Identifier: GPL-2.0
20 static int tun_attach(int fd, char *dev)  in tun_attach()  argument
28 	return ioctl(fd, TUNSETQUEUE, (void *) &ifr);  in tun_attach()
31 static int tun_detach(int fd, char *dev)  in tun_detach()  argument
39 	return ioctl(fd, TUNSETQUEUE, (void *) &ifr);  in tun_detach()
45 	int fd, err;  in tun_alloc()  local
47 	fd = open("/dev/net/tun", O_RDWR);  in tun_alloc()
48 	if (fd < 0) {  in tun_alloc()
49 		fprintf(stderr, "can't open tun: %s\n", strerror(errno));  in tun_alloc()
50 		return fd;  in tun_alloc()
57 	err = ioctl(fd, TUNSETIFF, (void *) &ifr);  in tun_alloc()
59 		fprintf(stderr, "can't TUNSETIFF: %s\n", strerror(errno));  in tun_alloc()
60 		close(fd);  in tun_alloc()
64 	return fd;  in tun_alloc()
79 		fprintf(stderr, "can't open rtnl: %s\n", strerror(errno));  in tun_delete()
91 	rta->rta_type = IFLA_IFNAME;  in tun_delete()
92 	rta->rta_len = RTA_LENGTH(IFNAMSIZ);  in tun_delete()
93 	req.nh.nlmsg_len += rta->rta_len;  in tun_delete()
98 		fprintf(stderr, "can't send: %s\n", strerror(errno));  in tun_delete()
108 	int fd, fd2;  in FIXTURE()  local
113 	memset(self->ifname, 0, sizeof(self->ifname));  in FIXTURE_SETUP()
115 	self->fd = tun_alloc(self->ifname);  in FIXTURE_SETUP()
116 	ASSERT_GE(self->fd, 0);  in FIXTURE_SETUP()
118 	self->fd2 = tun_alloc(self->ifname);  in FIXTURE_SETUP()
119 	ASSERT_GE(self->fd2, 0);  in FIXTURE_SETUP()
124 	if (self->fd >= 0)  in FIXTURE_TEARDOWN()
125 		close(self->fd);  in FIXTURE_TEARDOWN()
126 	if (self->fd2 >= 0)  in FIXTURE_TEARDOWN()
127 		close(self->fd2);  in FIXTURE_TEARDOWN()
131 	EXPECT_EQ(tun_delete(self->ifname), 0);  in TEST_F()
132 	EXPECT_EQ(tun_detach(self->fd, self->ifname), -1);  in TEST_F()
137 	EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);  in TEST_F()
138 	EXPECT_EQ(tun_delete(self->ifname), 0);  in TEST_F()
142 	EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);  in TEST_F()
143 	close(self->fd);  in TEST_F()
144 	self->fd = -1;  in TEST_F()
145 	EXPECT_EQ(tun_delete(self->ifname), 0);  in TEST_F()
149 	EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);  in TEST_F()
150 	EXPECT_EQ(tun_attach(self->fd, self->ifname), 0);  in TEST_F()
151 	EXPECT_EQ(tun_delete(self->ifname), 0);  in TEST_F()
155 	EXPECT_EQ(tun_detach(self->fd, self->ifname), 0);  in TEST_F()
156 	EXPECT_EQ(tun_attach(self->fd, self->ifname), 0);  in TEST_F()
157 	close(self->fd);  in TEST_F()
158 	self->fd = -1;  in TEST_F()
159 	EXPECT_EQ(tun_delete(self->ifname), 0);  in TEST_F()