*/
#ifndef lint
-static char rcsid[] = "$Id: demand.c,v 1.5 1996/08/28 06:40:03 paulus Exp $";
+static char rcsid[] = "$Id: demand.c,v 1.7 1997/11/27 06:08:26 paulus Exp $";
#endif
#include <stdio.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <sys/socket.h>
+#ifdef PPP_FILTER
#include <net/if.h>
+#include <net/bpf.h>
+#include <pcap.h>
+#endif
#include "pppd.h"
#include "fsm.h"
ppp_send_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
ppp_recv_config(0, PPP_MRU, (u_int32_t) 0, 0, 0);
-#if 0
+#ifdef PPP_FILTER
set_filters(&pass_filter, &active_filter);
#endif
* decide whether to bring up the link or not, and, if we want
* to transmit this frame later, put it on the pending queue.
* Return value is 1 if we need to bring up the link, 0 otherwise.
+ * We assume that the kernel driver has already applied the
+ * pass_filter, so we won't get packets it rejected.
+ * We apply the active_filter to see if we want this packet to
+ * bring up the link.
*/
int
loop_frame(frame, len)
{
struct packet *pkt;
- /* log_packet(frame, len, "from loop: "); */
+ /* log_packet(frame, len, "from loop: ", LOG_DEBUG); */
if (len < PPP_HDRLEN)
return 0;
if ((PPP_PROTOCOL(frame) & 0x8000) != 0)
if (len < PPP_HDRLEN)
return 0;
proto = PPP_PROTOCOL(p);
+#ifdef PPP_FILTER
+ if (active_filter.bf_len != 0
+ && bpf_filter(active_filter.bf_insns, frame, len, len) == 0)
+ return 0;
+#endif
for (i = 0; (protp = protocols[i]) != NULL; ++i) {
if (protp->protocol < 0xC000 && (protp->protocol & ~0x8000) == proto) {
if (!protp->enabled_flag)