Add an option for insecure mode, in which rwhod does not discard packets
from incorrect source ports.
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=41895
@ -39,6 +39,7 @@
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.Nd system status server
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.Sh SYNOPSIS
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.Nm rwhod
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.Op Fl i
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.Op Fl m Op Ar ttl
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.Sh DESCRIPTION
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.Nm Rwhod
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@ -64,6 +65,12 @@ them in a collection of files located in the directory
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.Pa /var/rwho .
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.Pp
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The
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.Fl i
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option enables insecure mode, which causes
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.Nm
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to ignore the source port on incoming packets.
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.Pp
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The
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.Fl m
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option causes
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.Nm
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@ -163,7 +170,9 @@ Messages received by the
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.Nm rwho
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server are discarded unless they originated at an
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.Nm rwho
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server's port. In addition, if the host's name, as specified
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server's port or the
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.Fl i
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option was specified. In addition, if the host's name, as specified
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in the message, contains any unprintable
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.Tn ASCII
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characters, the
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@ -42,7 +42,7 @@ static const char copyright[] =
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static char sccsid[] = "@(#)rwhod.c 8.1 (Berkeley) 6/6/93";
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#endif
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static const char rcsid[] =
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"$Id$";
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"$Id: rwhod.c,v 1.7 1997/10/13 11:27:55 charnier Exp $";
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#endif /* not lint */
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#include <sys/param.h>
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@ -115,6 +115,7 @@ static const char rcsid[] =
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#define INADDR_WHOD_GROUP (u_long)0xe0000103 /* 224.0.1.3 */
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/* (belongs in protocols/rwhod.h) */
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int insecure_mode;
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int multicast_mode = NO_MULTICAST;
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int multicast_scope;
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struct sockaddr_in multicast_addr = { sizeof multicast_addr, AF_INET };
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@ -194,6 +195,8 @@ main(argc, argv)
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}
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else multicast_mode = PER_INTERFACE_MULTICAST;
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}
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else if (strcmp(*argv, "-i") == 0)
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insecure_mode = 1;
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else
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usage();
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argv++, argc--;
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@ -265,7 +268,7 @@ main(argc, argv)
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syslog(LOG_WARNING, "recv: %m");
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continue;
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}
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if (from.sin_port != sp->s_port) {
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if (from.sin_port != sp->s_port && !insecure_mode) {
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syslog(LOG_WARNING, "%d: bad from port",
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ntohs(from.sin_port));
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continue;
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@ -319,7 +322,7 @@ main(argc, argv)
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static void
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usage()
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{
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fprintf(stderr, "usage: rwhod [-m [ttl]]\n");
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fprintf(stderr, "usage: rwhod [-i] [-m [ttl]]\n");
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exit(1);
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}
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