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diff -ur knock-0.3/src/knock.c knock-0.3-fix/src/knock.c
--- knock-0.3/src/knock.c 2004-05-07 00:56:03.000000000 +0200
+++ knock-0.3-fix/src/knock.c 2004-08-04 00:53:25.663567392 +0200
@@ -30,6 +30,7 @@
#include <string.h>
#include <resolv.h>
#include <getopt.h>
+#include <fcntl.h>
static char version[] = "0.3";
@@ -79,7 +80,10 @@
if(o_udp) {
sd = socket(PF_INET, SOCK_DGRAM, 0);
} else {
+ int flags;
sd = socket(PF_INET, SOCK_STREAM, 0);
+ flags = fcntl(sd, F_GETFL, 0);
+ fcntl(sd, F_SETFL, flags | O_NONBLOCK);
}
memset(&addr, 0, sizeof(addr));
addr.sin_family = AF_INET;
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