Implement knobs to enable/disable VJ header compression.

Submitted by:	i4b (modified)
MFC after:	1 month

2 files changed, 17 insertions, 2 deletions

diff --git a/sbin/spppcontrol/spppcontrol.8 b/sbin/spppcontrol/spppcontrol.8
index d531de9..8db48bc 100644
--- a/sbin/spppcontrol/spppcontrol.8
+++ b/sbin/spppcontrol/spppcontrol.8
@@ -1,4 +1,4 @@
-.\" Copyright (C) 1997 by Joerg Wunsch, Dresden
+.\" Copyright (C) 1997, 2001 by Joerg Wunsch, Dresden
 .\" All rights reserved.
 .\"
 .\" Redistribution and use in source and binary forms, with or without
@@ -24,7 +24,7 @@
 .\"
 .\" $FreeBSD$
 .\"
-.Dd October 11, 1997
+.Dd December 27, 2001
 .Os
 .Dt SPPPCONTROL 8
 .Sh NAME
@@ -164,6 +164,10 @@ through approximately 800 seconds.)  This is the default, and will not
 be explicitly displayed in
 .Ql list
 mode.
+.It Ar enable-vj
+Enable negotiation of Van Jacobsen header compression.  (Enabled by default.)
+.It Ar disable-vj
+Disable negotiation of Van Jacobsen header compression.
 .El
 .Sh EXAMPLES
 .Bd -literal
@@ -171,6 +175,7 @@ mode.
 bppp0:	phase=dead
 	myauthproto=chap myauthname="uriah"
 	hisauthproto=chap hisauthname="ifb-gw" norechallenge
+	enable-vj
 .Ed
 .Pp
 Display the settings for bppp0.  The interface is currently in
diff --git a/sbin/spppcontrol/spppcontrol.c b/sbin/spppcontrol/spppcontrol.c
index fa902f9..e1ddfff 100644
--- a/sbin/spppcontrol/spppcontrol.c
+++ b/sbin/spppcontrol/spppcontrol.c
@@ -32,10 +32,15 @@ static const char rcsid[] =
 #include <sys/param.h>
 #include <sys/callout.h>
 #include <sys/ioctl.h>
+#include <sys/mbuf.h>
 #include <sys/socket.h>
 
 #include <net/if.h>
 #include <net/if_var.h>
+#include <netinet/in.h>
+#include <netinet/in_systm.h>
+#include <netinet/ip.h>
+#include <net/slcompress.h>
 #include <net/if_sppp.h>
 
 #include <err.h>
@@ -160,6 +165,10 @@ main(int argc, char **argv)
 			spr.defs.hisauth.flags |= AUTHFLAG_NORECHALLENGE;
 		else if (strcmp(argv[0], "rechallenge") == 0)
 			spr.defs.hisauth.flags &= ~AUTHFLAG_NORECHALLENGE;
+		else if (strcmp(argv[0], "enable-vj") == 0)
+			spr.defs.enable_vj = 1;
+		else if (strcmp(argv[0], "disable-vj") == 0)
+			spr.defs.enable_vj = 0;
 		else
 			errx(EX_DATAERR, "bad parameter: \"%s\"", argv[0]);
 
@@ -202,6 +211,7 @@ print_vals(const char *ifname, struct spppreq *sp)
 		       AUTHNAMELEN, sp->defs.hisauth.name,
 		       authflags(sp->defs.hisauth.flags));
 	}
+	printf("\t%sable-vj\n", sp->defs.enable_vj? "en": "dis");
 }
 
 const char *