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minissdp: Delay before answering ssdp:all requests

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With some device combinations, our responses may be lost if we don't
delay for some time.
This commit is contained in:
Justin Maggard 2018-01-08 18:04:57 -08:00
parent 0d224a4607
commit 33fd018828
1 changed files with 5 additions and 3 deletions
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8
minissdp.c
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@ -204,9 +204,10 @@ static const char * const known_service_types[] =
};
static void
_usleep(long usecs)
_usleep(long min, long max)
{
struct timespec sleep_time;
long usecs = min + rand() / (RAND_MAX / (max - min + 1) + 1);
sleep_time.tv_sec = 0;
sleep_time.tv_nsec = usecs * 1000;
@ -278,7 +279,7 @@ SendSSDPNotifies(int s, const char *host, unsigned short port,
for (dup = 0; dup < 2; dup++)
{
if (dup)
_usleep(200000);
_usleep(150000, 250000);
i = 0;
while (known_service_types[i])
{
@ -722,7 +723,7 @@ ProcessSSDPRequest(int s, unsigned short port)
if (l != st_len)
break;
}
_usleep(random()>>20);
_usleep(13000, 20000);
SendSSDPResponse(s, sendername, i,
host, port, len_r);
return;
@ -731,6 +732,7 @@ ProcessSSDPRequest(int s, unsigned short port)
/* strlen("ssdp:all") == 8 */
if ((st_len == 8) && (memcmp(st, "ssdp:all", 8) == 0))
{
_usleep(13000, 30000);
for (i=0; known_service_types[i]; i++)
{
l = strlen(known_service_types[i]);