1 files changed, 3 insertions, 5 deletions

diff --git a/networking/pscan.c b/networking/pscan.c
index 9fa6993e8..fe146b8bd 100644
--- a/networking/pscan.c
+++ b/networking/pscan.c
@@ -35,13 +35,13 @@ int pscan_main(int argc, char **argv)
 {
         const char *opt_max_port = "1024";      /* -P: default max port */
         const char *opt_min_port = "1";         /* -p: default min port */
-        const char *opt_timeout = "5000";       /* -t: default timeout */
+        const char *opt_timeout = "5000";       /* -t: default timeout in msec */
         /* We estimate rtt and wait rtt*4 before concluding that port is 
          * totally blocked. min rtt of 5 ms may be too low if you are
          * scanning an Internet host behind saturated/traffic shaped link.
          * Rule of thumb: with min_rtt of N msec, scanning 1000 ports
          * will take N seconds at absolute minimum */
-        const char *opt_min_rtt = "5";          /* -T: default min rtt */
+        const char *opt_min_rtt = "5";          /* -T: default min rtt in msec */
         len_and_sockaddr *lsap;
         int s;
         unsigned port, max_port, nports;
@@ -57,10 +57,8 @@ int pscan_main(int argc, char **argv)
         getopt32(argc, argv, "p:P:t:T:", &opt_min_port, &opt_max_port, &opt_timeout, &opt_min_rtt);
         argv += optind;
         max_port = xatou_range(opt_max_port, 1, 65535);
-        port = xatou_range(opt_min_port, 1, 65535);
+        port = xatou_range(opt_min_port, 1, max_port);
         nports = max_port - port + 1;
-        if ((int)nports <= 0)
-                bb_show_usage();
         rtt_4 = timeout = xatou_range(opt_timeout, 1, INT_MAX/1000 / 4) * 1000;
         min_rtt = xatou_range(opt_min_rtt, 1, INT_MAX/1000 / 4) * 1000;