Commit 3cb4fb23 authored by Mark Nunberg's avatar Mark Nunberg
Browse files

Skip NXDOMAIN test when using evil ISPs

Some ISPs like to inject their own "Suggestions" page whenever you hit
NXDOMAIN. This confuses Redis as well as addrinfo (black-holing the
route).
parent cbe4ae63
......@@ -4,6 +4,7 @@
#include <string.h>
#include <strings.h>
#include <sys/time.h>
#include <netdb.h>
#include <assert.h>
#include <unistd.h>
#include <signal.h>
......@@ -91,7 +92,7 @@ static int disconnect(redisContext *c, int keep_fd) {
return -1;
}
static redisContext *connect(struct config config) {
static redisContext *do_connect(struct config config) {
redisContext *c = NULL;
if (config.type == CONN_TCP) {
......@@ -248,7 +249,7 @@ static void test_append_formatted_commands(struct config config) {
char *cmd;
int len;
c = connect(config);
c = do_connect(config);
test("Append format command: ");
......@@ -434,18 +435,32 @@ static void test_free_null(void) {
static void test_blocking_connection_errors(void) {
redisContext *c;
test("Returns error when host cannot be resolved: ");
c = redisConnect((char*)"idontexist.test", 6379);
test_cond(c->err == REDIS_ERR_OTHER &&
(strcmp(c->errstr,"Name or service not known") == 0 ||
strcmp(c->errstr,"Can't resolve: idontexist.test") == 0 ||
strcmp(c->errstr,"nodename nor servname provided, or not known") == 0 ||
strcmp(c->errstr,"No address associated with hostname") == 0 ||
strcmp(c->errstr,"Temporary failure in name resolution") == 0 ||
strcmp(c->errstr,"hostname nor servname provided, or not known") == 0 ||
strcmp(c->errstr,"no address associated with name") == 0));
redisFree(c);
struct addrinfo hints = {.ai_family = AF_INET};
struct addrinfo *ai_tmp = NULL;
const char *bad_domain = "idontexist.com";
int rv = getaddrinfo(bad_domain, "6379", &hints, &ai_tmp);
if (rv != 0) {
// Address does *not* exist
test("Returns error when host cannot be resolved: ");
// First see if this domain name *actually* resolves to NXDOMAIN
c = redisConnect("dontexist.com", 6379);
test_cond(
c->err == REDIS_ERR_OTHER &&
(strcmp(c->errstr, "Name or service not known") == 0 ||
strcmp(c->errstr, "Can't resolve: sadkfjaskfjsa.com") == 0 ||
strcmp(c->errstr,
"nodename nor servname provided, or not known") == 0 ||
strcmp(c->errstr, "No address associated with hostname") == 0 ||
strcmp(c->errstr, "Temporary failure in name resolution") == 0 ||
strcmp(c->errstr,
"hostname nor servname provided, or not known") == 0 ||
strcmp(c->errstr, "no address associated with name") == 0));
redisFree(c);
} else {
printf("Skipping NXDOMAIN test. Found evil ISP!\n");
freeaddrinfo(ai_tmp);
}
test("Returns error when the port is not open: ");
c = redisConnect((char*)"localhost", 1);
......@@ -463,7 +478,7 @@ static void test_blocking_connection(struct config config) {
redisContext *c;
redisReply *reply;
c = connect(config);
c = do_connect(config);
test("Is able to deliver commands: ");
reply = redisCommand(c,"PING");
......@@ -544,7 +559,7 @@ static void test_blocking_connection_timeouts(struct config config) {
const char *cmd = "DEBUG SLEEP 3\r\n";
struct timeval tv;
c = connect(config);
c = do_connect(config);
test("Successfully completes a command when the timeout is not exceeded: ");
reply = redisCommand(c,"SET foo fast");
freeReplyObject(reply);
......@@ -556,7 +571,7 @@ static void test_blocking_connection_timeouts(struct config config) {
freeReplyObject(reply);
disconnect(c, 0);
c = connect(config);
c = do_connect(config);
test("Does not return a reply when the command times out: ");
s = write(c->fd, cmd, strlen(cmd));
tv.tv_sec = 0;
......@@ -590,7 +605,7 @@ static void test_blocking_io_errors(struct config config) {
int major, minor;
/* Connect to target given by config. */
c = connect(config);
c = do_connect(config);
{
/* Find out Redis version to determine the path for the next test */
const char *field = "redis_version:";
......@@ -625,7 +640,7 @@ static void test_blocking_io_errors(struct config config) {
strcmp(c->errstr,"Server closed the connection") == 0);
redisFree(c);
c = connect(config);
c = do_connect(config);
test("Returns I/O error on socket timeout: ");
struct timeval tv = { 0, 1000 };
assert(redisSetTimeout(c,tv) == REDIS_OK);
......@@ -659,7 +674,7 @@ static void test_invalid_timeout_errors(struct config config) {
}
static void test_throughput(struct config config) {
redisContext *c = connect(config);
redisContext *c = do_connect(config);
redisReply **replies;
int i, num;
long long t1, t2;
......
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