Add some more comments and a -4 argument to restrict searches to only
A (not default A and AAAA) records. Now the longest time that a -4 thread might hang trying to resolve is only 2:30 instead of 5:00 ;)
This commit is contained in:
parent
3a7fa52e65
commit
b99c0fd2b4
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=126085
@ -53,6 +53,7 @@ static volatile int workers_stop = 0;
|
||||
static double max_random_sleep = 1.0;
|
||||
static char **randwords;
|
||||
static size_t nrandwords;
|
||||
static const struct addrinfo *hints, hintipv4only = { .ai_family = AF_INET };
|
||||
|
||||
/*
|
||||
* We don't have good random(3)-type functions that are thread-safe,
|
||||
@ -89,13 +90,20 @@ randomsleep(double max_sleep_sec)
|
||||
* Start looking up arbitrary hostnames and record the successes/failures.
|
||||
* Between lookups, sleep a random amount of time to make sure threads
|
||||
* stay well out of synchronization.
|
||||
*
|
||||
* Host name: part probability
|
||||
* ---- -----------
|
||||
* www. 1/2
|
||||
* random word always, equal
|
||||
* random word 1/3, equal
|
||||
* .(net|com|org) equal
|
||||
*/
|
||||
static void *
|
||||
work(void *arg)
|
||||
{
|
||||
struct worker *w = arg;
|
||||
|
||||
/* Turn off domain name list searching. */
|
||||
/* Turn off domain name list searching as much as possible. */
|
||||
if (_res.options & RES_INIT || res_init() == 0)
|
||||
_res.options &= ~RES_DNSRCH;
|
||||
do {
|
||||
@ -115,7 +123,7 @@ work(void *arg)
|
||||
suffixes[my_arc4random_r() % nsuffixes]) == -1)
|
||||
continue;
|
||||
(void)clock_gettime(CLOCK_REALTIME, &ts_begintime);
|
||||
error = getaddrinfo(hostname, NULL, NULL, &res);
|
||||
error = getaddrinfo(hostname, NULL, hints, &res);
|
||||
(void)clock_gettime(CLOCK_REALTIME, &ts_total);
|
||||
ts_total.tv_sec -= ts_begintime.tv_sec;
|
||||
ts_total.tv_nsec -= ts_begintime.tv_nsec;
|
||||
@ -188,8 +196,11 @@ main(int argc, char **argv) {
|
||||
printf("%s: threaded stress-tester for getaddrinfo(3)\n",
|
||||
getprogname());
|
||||
printf("(c) 2004 Brian Feldman <green@FreeBSD.org>\n");
|
||||
while ((ch = getopt(argc, argv, "s:t:w:")) != -1) {
|
||||
while ((ch = getopt(argc, argv, "4s:t:w:")) != -1) {
|
||||
switch (ch) {
|
||||
case '4':
|
||||
hints = &hintipv4only;
|
||||
break;
|
||||
case 's':
|
||||
max_random_sleep = strtod(optarg, &send);
|
||||
if (*send != '\0')
|
||||
@ -205,8 +216,8 @@ main(int argc, char **argv) {
|
||||
break;
|
||||
default:
|
||||
usage:
|
||||
fprintf(stderr, "usage: %s [-s sleep] [-t threads] "
|
||||
"[-w wordfile]\n", getprogname());
|
||||
fprintf(stderr, "usage: %s [-4] [-s sleep] "
|
||||
"[-t threads] [-w wordfile]\n", getprogname());
|
||||
exit(2);
|
||||
}
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user