/*
- * auth.c - PPP authentication and phase control.
+ * demand.c - Support routines for demand-dialling.
*
* Copyright (c) 1993 The Australian National University.
* All rights reserved.
*/
#ifndef lint
-static char rcsid[] = "$Id: demand.c,v 1.2 1996/04/04 03:36:44 paulus Exp $";
+static char rcsid[] = "$Id: demand.c,v 1.5 1996/08/28 06:40:03 paulus Exp $";
#endif
#include <stdio.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <net/if.h>
-#include <net/bpf.h>
#include "pppd.h"
#include "fsm.h"
#include "ipcp.h"
#include "lcp.h"
-#include "bpf_compile.h"
char *frame;
int framelen;
struct packet *pend_q;
struct packet *pend_qtail;
+static int active_packet __P((unsigned char *, int));
+
/*
* demand_conf - configure the interface for doing dial-on-demand.
*/
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
set_filters(&pass_filter, &active_filter);
+#endif
/*
* Call the demand_conf procedure for each protocol that's got one.
* 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: "); */
if (len < PPP_HDRLEN)
return 0;
if ((PPP_PROTOCOL(frame) & 0x8000) != 0)
return 0; /* shouldn't get any of these anyway */
- if (active_filter.bf_len != 0
- && bpf_filter(active_filter.bf_insns, frame, len, len) == 0)
+ if (!active_packet(frame, len))
return 0;
pkt = (struct packet *) malloc(sizeof(struct packet) + len);
if (prev != NULL)
prev->next = NULL;
}
+
+/*
+ * Scan a packet to decide whether it is an "active" packet,
+ * that is, whether it is worth bringing up the link for.
+ */
+static int
+active_packet(p, len)
+ unsigned char *p;
+ int len;
+{
+ int proto, i;
+ struct protent *protp;
+
+ if (len < PPP_HDRLEN)
+ return 0;
+ proto = PPP_PROTOCOL(p);
+ for (i = 0; (protp = protocols[i]) != NULL; ++i) {
+ if (protp->protocol < 0xC000 && (protp->protocol & ~0x8000) == proto) {
+ if (!protp->enabled_flag)
+ return 0;
+ if (protp->active_pkt == NULL)
+ return 1;
+ return (*protp->active_pkt)(p, len);
+ }
+ }
+ return 0; /* not a supported protocol !!?? */
+}