-/* $Id: if_ppp.c,v 1.5 1996/09/26 06:24:14 paulus Exp $ */
+/* $Id: if_ppp.c,v 1.9 2002/12/06 12:03:44 paulus Exp $ */
/*
* if_ppp.c - Point-to-Point Protocol (PPP) Asynchronous driver.
*
- * Copyright (c) 1989 Carnegie Mellon University.
- * All rights reserved.
+ * Copyright (c) 1984-2000 Carnegie Mellon University. All rights reserved.
*
- * Redistribution and use in source and binary forms are permitted
- * provided that the above copyright notice and this paragraph are
- * duplicated in all such forms and that any documentation,
- * advertising materials, and other materials related to such
- * distribution and use acknowledge that the software was developed
- * by Carnegie Mellon University. The name of the
- * University may not be used to endorse or promote products derived
- * from this software without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
- * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
- * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * 3. The name "Carnegie Mellon University" must not be used to
+ * endorse or promote products derived from this software without
+ * prior written permission. For permission or any legal
+ * details, please contact
+ * Office of Technology Transfer
+ * Carnegie Mellon University
+ * 5000 Forbes Avenue
+ * Pittsburgh, PA 15213-3890
+ * (412) 268-4387, fax: (412) 268-7395
+ * tech-transfer@andrew.cmu.edu
+ *
+ * 4. Redistributions of any form whatsoever must retain the following
+ * acknowledgment:
+ * "This product includes software developed by Computing Services
+ * at Carnegie Mellon University (http://www.cmu.edu/computing/)."
+ *
+ * CARNEGIE MELLON UNIVERSITY DISCLAIMS ALL WARRANTIES WITH REGARD TO
+ * THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
+ * AND FITNESS, IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY BE LIABLE
+ * FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
+ * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Drew D. Perkins
* Carnegie Mellon University
#include <net/if_types.h>
#include <net/netisr.h>
#include <net/route.h>
+#ifdef PPP_FILTER
+#include <net/bpf.h>
+#endif
#if INET
#include <netinet/in.h>
#include "bpfilter.h"
#if NBPFILTER > 0
+#include <sys/time.h>
#include <net/bpf.h>
#endif
#include <net/ppp-comp.h>
#endif
+static int pppsioctl __P((struct ifnet *, u_long, caddr_t));
static void ppp_requeue __P((struct ppp_softc *));
-static void ppp_outpkt __P((struct ppp_softc *));
static void ppp_ccp __P((struct ppp_softc *, struct mbuf *m, int rcvd));
static void ppp_ccp_closed __P((struct ppp_softc *));
static void ppp_inproc __P((struct ppp_softc *, struct mbuf *));
*/
extern struct compressor ppp_bsd_compress;
-extern struct compressor ppp_deflate;
+extern struct compressor ppp_deflate, ppp_deflate_draft;
struct compressor *ppp_compressors[8] = {
#if DO_BSD_COMPRESS
#endif
#if DO_DEFLATE
&ppp_deflate,
+ &ppp_deflate_draft,
#endif
NULL
};
sc->sc_xc_state = NULL;
sc->sc_rc_state = NULL;
#endif /* PPP_COMPRESS */
+#ifdef PPP_FILTER
+ if (sc->sc_pass_filt.bf_insns != 0) {
+ FREE(sc->sc_pass_filt.bf_insns, M_DEVBUF);
+ sc->sc_pass_filt.bf_insns = 0;
+ sc->sc_pass_filt.bf_len = 0;
+ }
+ if (sc->sc_active_filt.bf_insns != 0) {
+ FREE(sc->sc_active_filt.bf_insns, M_DEVBUF);
+ sc->sc_active_filt.bf_insns = 0;
+ sc->sc_active_filt.bf_len = 0;
+ }
+#endif /* PPP_FILTER */
#ifdef VJC
if (sc->sc_comp != 0) {
FREE(sc->sc_comp, M_DEVBUF);
struct compressor **cp;
struct npioctl *npi;
time_t t;
+#ifdef PPP_FILTER
+ struct bpf_program *bp, *nbp;
+ struct bpf_insn *newcode, *oldcode;
+ int newcodelen;
+#endif /* PPP_FILTER */
#ifdef PPP_COMPRESS
u_char ccp_option[CCP_MAX_OPTION_LENGTH];
#endif
splx(s);
break;
-#if 0
+#ifdef PPP_FILTER
case PPPIOCSPASS:
case PPPIOCSACTIVE:
nbp = (struct bpf_program *) data;
/*
* Process an ioctl request to the ppp network interface.
*/
-int
+static int
pppsioctl(ifp, cmd, data)
register struct ifnet *ifp;
u_long cmd;
}
if ((protocol & 0x8000) == 0) {
+#ifdef PPP_FILTER
+ /*
+ * Apply the pass and active filters to the packet,
+ * but only if it is a data packet.
+ */
+ *mtod(m0, u_char *) = 1; /* indicates outbound */
+ if (sc->sc_pass_filt.bf_insns != 0
+ && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m0,
+ len, 0) == 0) {
+ error = 0; /* drop this packet */
+ goto bad;
+ }
+
+ /*
+ * Update the time we sent the most recent packet.
+ */
+ if (sc->sc_active_filt.bf_insns == 0
+ || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m0, len, 0))
+ sc->sc_last_sent = time.tv_sec;
+
+ *mtod(m0, u_char *) = address;
+#else
/*
* Update the time we sent the most recent data packet.
*/
sc->sc_last_sent = time.tv_sec;
+#endif /* PPP_FILTER */
}
#if NBPFILTER > 0
struct mbuf *m, *mp;
u_char *cp;
int address, control, protocol;
- int s;
/*
* Grab a packet to send: first try the fast queue, then the
m->m_pkthdr.len = ilen;
m->m_pkthdr.rcvif = ifp;
- /*
- * Record the time that we received this packet.
- */
if ((proto & 0x8000) == 0) {
+#ifdef PPP_FILTER
+ /*
+ * See whether we want to pass this packet, and
+ * if it counts as link activity.
+ */
+ adrs = *mtod(m, u_char *); /* save address field */
+ *mtod(m, u_char *) = 0; /* indicate inbound */
+ if (sc->sc_pass_filt.bf_insns != 0
+ && bpf_filter(sc->sc_pass_filt.bf_insns, (u_char *) m,
+ ilen, 0) == 0) {
+ /* drop this packet */
+ m_freem(m);
+ return;
+ }
+ if (sc->sc_active_filt.bf_insns == 0
+ || bpf_filter(sc->sc_active_filt.bf_insns, (u_char *) m, ilen, 0))
+ sc->sc_last_recv = time.tv_sec;
+
+ *mtod(m, u_char *) = adrs;
+#else
+ /*
+ * Record the time that we received this packet.
+ */
sc->sc_last_recv = time.tv_sec;
+#endif /* PPP_FILTER */
}
#if NBPFILTER > 0
projects / ppp.git / blobdiff