Support `igmp' filters.

Mostly submitted by: Timo Geusch <freebsd@sleepycat.ukpeople.net>

5 files changed, 32 insertions, 11 deletions

diff --git a/usr.sbin/ppp/ppp/command.c b/usr.sbin/ppp/ppp/command.c
index 01dca786260..e5ad05a325f 100644
--- a/usr.sbin/ppp/ppp/command.c
+++ b/usr.sbin/ppp/ppp/command.c
@@ -17,7 +17,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: command.c,v 1.29 1999/06/10 09:34:42 brian Exp $
+ * $Id: command.c,v 1.30 1999/06/23 16:49:03 brian Exp $
  *
  */
 #include <sys/param.h>
@@ -144,7 +144,7 @@
 #define NEG_VJCOMP	53
 
 const char Version[] = "2.22";
-const char VersionDate[] = "$Date: 1999/06/10 09:34:42 $";
+const char VersionDate[] = "$Date: 1999/06/23 16:49:03 $";
 
 static int ShowCommand(struct cmdargs const *);
 static int TerminalCommand(struct cmdargs const *);
@@ -1814,8 +1814,8 @@ static struct cmdtab const SetCommands[] = {
   "escape characters", "set escape hex-digit ..."},
   {"filter", NULL, filter_Set, LOCAL_AUTH,
   "packet filters", "set filter alive|dial|in|out rule-no permit|deny "
-  "[src_addr[/width]] [dst_addr[/width]] [tcp|udp|icmp [src [lt|eq|gt port]] "
-  "[dst [lt|eq|gt port]] [estab] [syn] [finrst]]"},
+  "[src_addr[/width]] [dst_addr[/width]] [tcp|udp|icmp|igmp "
+  "[src [lt|eq|gt port]] [dst [lt|eq|gt port]] [estab] [syn] [finrst]]"},
   {"hangup", NULL, SetVariable, LOCAL_AUTH | LOCAL_CX,
   "hangup script", "set hangup chat-script", (const void *) VAR_HANGUP},
   {"ifaddr", NULL, SetInterfaceAddr, LOCAL_AUTH, "destination address",
diff --git a/usr.sbin/ppp/ppp/filter.c b/usr.sbin/ppp/ppp/filter.c
index 491e62783cc..19868a8776f 100644
--- a/usr.sbin/ppp/ppp/filter.c
+++ b/usr.sbin/ppp/ppp/filter.c
@@ -17,7 +17,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: filter.c,v 1.5 1999/05/31 23:57:36 brian Exp $
+ * $Id: filter.c,v 1.6 1999/06/23 16:49:03 brian Exp $
  *
  *	TODO: Shoud send ICMP error message when we discard packets.
  */
@@ -261,6 +261,18 @@ ParseUdpOrTcp(int argc, char const *const *argv, int proto,
   return 1;
 }
 
+static int ParseIgmp(int argc, char const * const *argv, struct filterent *tgt) {
+  /* Filter currently is a catch-all. Requests are either permitted or
+     dropped. */
+  if (argc != 0) {
+    log_Printf(LogWARN, "ParseIgmp: Too many parameters\n");
+    return 0;
+  } else
+    tgt->opt.srcop = OP_NONE;
+
+  return 1;
+}
+
 static unsigned
 addrtype(const char *addr)
 {
@@ -396,6 +408,9 @@ Parse(struct ipcp *ipcp, int argc, char const *const *argv,
   case P_ICMP:
     val = ParseIcmp(argc, argv, &filterdata);
     break;
+  case P_IGMP:
+    val = ParseIgmp(argc, argv, &filterdata);
+    break;
   }
 
   log_Printf(LogDEBUG, "Parse: Src: %s\n", inet_ntoa(filterdata.src.ipaddr));
@@ -529,7 +544,7 @@ filter_Show(struct cmdargs const *arg)
   return 0;
 }
 
-static const char *protoname[] = { "none", "tcp", "udp", "icmp" };
+static const char *protoname[] = { "none", "tcp", "udp", "icmp", "igmp" };
 
 const char *
 filter_Proto2Nam(int proto)
diff --git a/usr.sbin/ppp/ppp/filter.h b/usr.sbin/ppp/ppp/filter.h
index 334170e22c3..5d4159594aa 100644
--- a/usr.sbin/ppp/ppp/filter.h
+++ b/usr.sbin/ppp/ppp/filter.h
@@ -15,7 +15,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: filter.h,v 1.4 1999/05/31 23:57:37 brian Exp $
+ * $Id: filter.h,v 1.5 1999/06/23 16:49:03 brian Exp $
  *
  *	TODO:
  */
@@ -33,6 +33,7 @@
 #define	P_TCP	1
 #define	P_UDP	2
 #define	P_ICMP	3
+#define P_IGMP	4
 
 /* Operations */
 #define	OP_NONE	0
diff --git a/usr.sbin/ppp/ppp/ip.c b/usr.sbin/ppp/ppp/ip.c
index bc0cf77229b..53c73df90a4 100644
--- a/usr.sbin/ppp/ppp/ip.c
+++ b/usr.sbin/ppp/ppp/ip.c
@@ -17,7 +17,7 @@
  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  *
- * $Id: ip.c,v 1.12 1999/06/02 15:58:40 brian Exp $
+ * $Id: ip.c,v 1.13 1999/06/23 16:49:04 brian Exp $
  *
  *	TODO:
  *		o Return ICMP message for filterd packet
@@ -139,8 +139,12 @@ FilterCheck(struct ip *pip, struct filter *filter)
                 if (log_IsKept(LogDEBUG))
 		  snprintf(dbuff, sizeof dbuff, "sport = %d", sport);
 		break;
-	      case IPPROTO_UDP:
 	      case IPPROTO_IGMP:
+		cproto = P_IGMP;
+		estab = syn = finrst = -1;
+		sport = ntohs(0);
+		break;
+	      case IPPROTO_UDP:
 	      case IPPROTO_IPIP:
 		cproto = P_UDP;
 		uh = (struct udphdr *) ptop;
diff --git a/usr.sbin/ppp/ppp/ppp.8 b/usr.sbin/ppp/ppp/ppp.8
index e133900e47c..0446ff62c91 100644
--- a/usr.sbin/ppp/ppp/ppp.8
+++ b/usr.sbin/ppp/ppp/ppp.8
@@ -1,4 +1,4 @@
-.\" $Id: ppp.8,v 1.52 1999/06/14 10:14:19 brian Exp $
+.\" $Id: ppp.8,v 1.53 1999/06/23 16:49:04 brian Exp $
 .Dd 20 September 1995
 .nr XX \w'\fC00'
 .Os
@@ -1465,6 +1465,7 @@ command below.
 .Ar Proto
 must be one of
 .Sq icmp ,
+.Sq igmp ,
 .Sq udp
 or
 .Sq tcp .
@@ -3830,7 +3831,7 @@ as they travel across the link.
 .No permit|deny
 .Oo Ar src_addr Ns Op / Ns Ar width
 .Op Ar dst_addr Ns Op / Ns Ar width
-.Oc Oo tcp|udp|icmp Op src lt|eq|gt Ar port
+.Oc Oo tcp|udp|igmp|icmp Op src lt|eq|gt Ar port
 .Op dst lt|eq|gt Ar port
 .Op estab
 .Op syn