crank SO_SNDBUF if needed, kml@nas.nasa.gov

diff --git a/sbin/ping/ping.c b/sbin/ping/ping.c
index ea4f485..4763c23 100644 (file)
--- a/sbin/ping/ping.c
+++ b/sbin/ping/ping.c
@@ -1,4 +1,4 @@
-/*     $OpenBSD: ping.c,v 1.8 1996/07/23 10:36:41 deraadt Exp $        */
+/*     $OpenBSD: ping.c,v 1.9 1996/12/10 08:37:06 deraadt Exp $        */
 /*     $NetBSD: ping.c,v 1.20 1995/08/11 22:37:58 cgd Exp $    */
 
 /*
@@ -47,7 +47,7 @@ static char copyright[] =
 #if 0
 static char sccsid[] = "@(#)ping.c     8.1 (Berkeley) 6/5/93";
 #else
-static char rcsid[] = "$OpenBSD: ping.c,v 1.8 1996/07/23 10:36:41 deraadt Exp $";
+static char rcsid[] = "$OpenBSD: ping.c,v 1.9 1996/12/10 08:37:06 deraadt Exp $";
 #endif
 #endif /* not lint */
 
@@ -183,6 +183,7 @@ main(argc, argv)
        struct in_addr saddr;
        register int i;
        int ch, fdmask, hold = 1, packlen, preload;
+       int maxsize, maxsizelen;
        u_char *datap, *packet;
        char *target, hnamebuf[MAXHOSTNAMELEN];
        u_char ttl = MAXTTL, loop = 1, df = 0;
@@ -412,6 +413,17 @@ main(argc, argv)
                       sizeof(saddr)) < 0)
                err(1, "setsockopt IP_MULTICAST_IF");
 
+       /* 
+        * When trying to send large packets, you must increase the
+        * size of both the send and receive buffers...
+        */
+       maxsizelen = sizeof maxsize;
+       if (getsockopt(s, SOL_SOCKET, SO_SNDBUF, &maxsize, &maxsizelen) < 0)
+               err(1, "getsockopt");
+       if (maxsize < packlen &&
+           setsockopt(s, SOL_SOCKET, SO_SNDBUF, &packlen, sizeof(maxsize)) < 0)
+               err(1, "setsockopt");
+
        /*
         * When pinging the broadcast address, you can get a lot of answers.
         * Doing something so evil is useful if you are trying to stress the