Skip to content

Commit

Permalink
[libtap] tests: allow random localhost IPs for testing
Browse files Browse the repository at this point in the history 
- avoids clashing with machine routing
- allows parallel testing

Signed-off-by: Fabio M. Di Nitto <fdinitto@redhat.com>
  • Loading branch information
@fabbione
fabbione committed Apr 19, 2018
1 parent 39049b4 commit 37b3e66
Showing 1 changed file with 115 additions and 34 deletions.
149 changes: 115 additions & 34 deletions libtap/libtap.c
View file
Expand Up @@ -979,6 +979,12 @@ int tap_get_ips(const tap_t tap, char **ip_addr_list, int *entries)
}

#ifdef TEST

char testipv4_1[1024];
char testipv4_2[1024];
char testipv6_1[1024];
char testipv6_2[1024];

static int is_if_in_system(char *name)
{
struct ifaddrs *ifap = NULL;
Expand Down Expand Up @@ -1263,6 +1269,7 @@ static int check_knet_mtu_ipv6(void)
{
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
char verifycmd[1024];
int err=0;
tap_t tap;
char *error_string = NULL;
Expand All @@ -1277,9 +1284,9 @@ static int check_knet_mtu_ipv6(void)
return -1;
}

printf("Adding ip: 3ffe::1/64\n");
printf("Adding ip: %s/64\n", testipv6_1);

err = tap_add_ip(tap, "3ffe::1", "64", &error_string);
err = tap_add_ip(tap, testipv6_1, "64", &error_string);
if (error_string) {
printf("add ipv6 output: %s\n", error_string);
free(error_string);
Expand All @@ -1291,7 +1298,10 @@ static int check_knet_mtu_ipv6(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 3ffe::1/64", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
"ip addr show dev kronostest | grep -q %s/64", testipv6_1);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -1310,7 +1320,7 @@ static int check_knet_mtu_ipv6(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 3ffe::1/64", &error_string);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -1322,8 +1332,8 @@ static int check_knet_mtu_ipv6(void)
goto out_clean;
}

printf("Adding ip: 3ffe::2/64\n");
err = tap_add_ip(tap, "3ffe::2", "64", &error_string);
printf("Adding ip: %s/64\n", testipv6_2);
err = tap_add_ip(tap, testipv6_2, "64", &error_string);
if (error_string) {
printf("add ipv6 output: %s\n", error_string);
free(error_string);
Expand All @@ -1335,7 +1345,10 @@ static int check_knet_mtu_ipv6(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 3ffe::2/64", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
"ip addr show dev kronostest | grep -q %s/64", testipv6_2);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -1354,7 +1367,10 @@ static int check_knet_mtu_ipv6(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 3ffe::1/64", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd) -1,
"ip addr show dev kronostest | grep -q %s/64", testipv6_1);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -1366,7 +1382,10 @@ static int check_knet_mtu_ipv6(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 3ffe::2/64", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd) -1,
"ip addr show dev kronostest | grep -q %s/64", testipv6_2);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand Down Expand Up @@ -1840,9 +1859,9 @@ static int check_knet_close_leak(void)
return -1;
}

printf("Adding ip: 192.168.168.168/24\n");
printf("Adding ip: %s/24\n", testipv4_1);

err = tap_add_ip(tap, "192.168.168.168", "24", &error_string);
err = tap_add_ip(tap, testipv4_1, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
Expand All @@ -1854,9 +1873,9 @@ static int check_knet_close_leak(void)
goto out_clean;
}

printf("Adding ip: 192.168.169.169/24\n");
printf("Adding ip: %s/24\n", testipv4_2);

err = tap_add_ip(tap, "192.168.169.169", "24", &error_string);
err = tap_add_ip(tap, testipv4_2, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
Expand All @@ -1879,6 +1898,7 @@ static int check_knet_set_del_ip(void)
{
char device_name[IFNAMSIZ];
size_t size = IFNAMSIZ;
char verifycmd[1024];
int err=0;
tap_t tap;
char *ip_list = NULL;
Expand All @@ -1895,9 +1915,9 @@ static int check_knet_set_del_ip(void)
return -1;
}

printf("Adding ip: 192.168.168.168/24\n");
printf("Adding ip: %s/24\n", testipv4_1);

err = tap_add_ip(tap, "192.168.168.168", "24", &error_string);
err = tap_add_ip(tap, testipv4_1, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
Expand All @@ -1909,9 +1929,9 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

printf("Adding ip: 192.168.169.169/24\n");
printf("Adding ip: %s/24\n", testipv4_2);

err = tap_add_ip(tap, "192.168.169.169", "24", &error_string);
err = tap_add_ip(tap, testipv4_2, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
Expand All @@ -1923,9 +1943,9 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

printf("Adding duplicate ip: 192.168.168.168/24\n");
printf("Adding duplicate ip: %s/24\n", testipv4_1);

err = tap_add_ip(tap, "192.168.168.168", "24", &error_string);
err = tap_add_ip(tap, testipv4_1, "24", &error_string);
if (error_string) {
printf("add ip output: %s\n", error_string);
free(error_string);
Expand All @@ -1937,9 +1957,12 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

printf("Checking ip: 192.168.168.168/24\n");
printf("Checking ip: %s/24\n", testipv4_1);

err = _execute_shell("ip addr show dev kronostest | grep -q 192.168.168.168/24", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
"ip addr show dev kronostest | grep -q %s/24", testipv4_1);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand Down Expand Up @@ -1973,9 +1996,9 @@ static int check_knet_set_del_ip(void)

free(ip_list);

printf("Deleting ip: 192.168.168.168/24\n");
printf("Deleting ip: %s/24\n", testipv4_1);

err = tap_del_ip(tap, "192.168.168.168", "24", &error_string);
err = tap_del_ip(tap, testipv4_1, "24", &error_string);
if (error_string) {
printf("del ip output: %s\n", error_string);
free(error_string);
Expand All @@ -1987,9 +2010,9 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

printf("Deleting ip: 192.168.169.169/24\n");
printf("Deleting ip: %s/24\n", testipv4_2);

err = tap_del_ip(tap, "192.168.169.169", "24", &error_string);
err = tap_del_ip(tap, testipv4_2, "24", &error_string);
if (error_string) {
printf("del ip output: %s\n", error_string);
free(error_string);
Expand All @@ -2001,9 +2024,9 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

printf("Deleting again ip: 192.168.168.168/24\n");
printf("Deleting again ip: %s/24\n", testipv4_1);

err = tap_del_ip(tap, "192.168.168.168", "24", &error_string);
err = tap_del_ip(tap, testipv4_1, "24", &error_string);
if (error_string) {
printf("del ip output: %s\n", error_string);
free(error_string);
Expand All @@ -2015,7 +2038,10 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 192.168.168.168/24", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
"ip addr show dev kronostest | grep -q %s/24", testipv4_1);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -2027,9 +2053,9 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

printf("Adding ip: 3ffe::1/64\n");
printf("Adding ip: %s/64\n", testipv6_1);

err = tap_add_ip(tap, "3ffe::1", "64", &error_string);
err = tap_add_ip(tap, testipv6_1, "64", &error_string);
if (error_string) {
printf("add ipv6 output: %s\n", error_string);
free(error_string);
Expand All @@ -2041,7 +2067,10 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 3ffe::1/64", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
"ip addr show dev kronostest | grep -q %s/64", testipv6_1);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -2053,9 +2082,9 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

printf("Deleting ip: 3ffe::1/64\n");
printf("Deleting ip: %s/64\n", testipv6_1);

err = tap_del_ip(tap, "3ffe::1", "64", &error_string);
err = tap_del_ip(tap, testipv6_1, "64", &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -2067,7 +2096,10 @@ static int check_knet_set_del_ip(void)
goto out_clean;
}

err = _execute_shell("ip addr show dev kronostest | grep -q 3ffe::1/64", &error_string);
memset(verifycmd, 0, sizeof(verifycmd));
snprintf(verifycmd, sizeof(verifycmd)-1,
"ip addr show dev kronostest | grep -q %s/64", testipv6_1);
err = _execute_shell(verifycmd, &error_string);
if (error_string) {
printf("Error string: %s\n", error_string);
free(error_string);
Expand All @@ -2086,13 +2118,62 @@ static int check_knet_set_del_ip(void)
return err;
}

static void make_local_ips(void)
{
pid_t mypid;
uint8_t *pid;

if (sizeof(pid_t) < 4) {
printf("pid_t is smaller than 4 bytes?\n");
exit(77);
}

memset(testipv4_1, 0, sizeof(testipv4_1));
memset(testipv4_2, 0, sizeof(testipv4_2));
memset(testipv6_1, 0, sizeof(testipv6_1));
memset(testipv6_2, 0, sizeof(testipv6_2));

mypid = getpid();
pid = (uint8_t *)&mypid;

snprintf(testipv4_1,
sizeof(testipv4_1) - 1,
"127.%u.%u.%u",
pid[0],
pid[1],
pid[2]);

snprintf(testipv4_2,
sizeof(testipv4_2) - 1,
"127.%u.%d.%u",
pid[0],
pid[1]+1,
pid[2]);

snprintf(testipv6_1,
sizeof(testipv6_1) - 1,
"::%u:%u:%u:1",
pid[0],
pid[1],
pid[2]);

snprintf(testipv6_2,
sizeof(testipv6_2) - 1,
"::%u:%u:%d:1",
pid[0],
pid[1],
pid[2]+1);
}

int main(void)
{
if (geteuid() != 0) {
printf("This test requires root privileges\n");
exit(77);
}

make_local_ips();

if (check_tap_open_close() < 0)
return -1;

Expand Down

0 comments on commit 37b3e66

Please sign in to comment.