Mensi updaty do ripu. Pridana passwd autentikace (netestovano).

5 files changed, 115 insertions, 44 deletions

diff --git a/proto/rip/Makefile b/proto/rip/Makefile
index 16bfe0f..d03e3a9 100644
--- a/proto/rip/Makefile
+++ b/proto/rip/Makefile
@@ -1,4 +1,4 @@
-source=rip.c
+source=rip.c auth.c
 root-rel=../../
 dir-name=proto/rip
 
diff --git a/proto/rip/auth.c b/proto/rip/auth.c
new file mode 100644
index 0000000..bffade3
--- /dev/null
+++ b/proto/rip/auth.c
@@ -0,0 +1,57 @@
+/*
+ *	Rest in pieces - RIP protocol
+ *
+ *	Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#define LOCAL_DEBUG
+
+#include <string.h>
+#include <stdlib.h>
+
+#include "nest/bird.h"
+#include "nest/iface.h"
+#include "nest/protocol.h"
+#include "nest/route.h"
+#include "lib/socket.h"
+#include "lib/resource.h"
+#include "lib/lists.h"
+#include "lib/timer.h"
+
+#include "rip.h"
+
+#define P ((struct rip_proto *) p)
+#define P_CF ((struct rip_proto_config *)p->cf)
+
+int
+rip_incoming_authentication( struct proto *p, struct rip_block *block, struct rip_packet *packet, int num )
+{
+  DBG( "Incoming authentication: " );
+
+  switch (block->tag) {	/* Authentication type */
+  case AT_PLAINTEXT:
+    DBG( "Plaintext passwd" );
+    if (strncmp( (char *) (&block->network), P_CF->password, 16)) {
+      log( L_AUTH, "Passwd authentication failed!\n" );
+      return 1;
+    }
+    return 0;
+  }
+    
+  return 0;
+}
+
+void
+rip_outgoing_authentication( struct proto *p, struct rip_block *block, struct rip_packet *packet, int num )
+{
+  DBG( "Outgoing authentication: " );
+
+  block->tag = P_CF->authtype;
+  switch (P_CF->authtype) {
+  case AT_PLAINTEXT:
+    strncpy( (char *) (&block->network), P_CF->password, 16);
+    return;
+  }
+}
diff --git a/proto/rip/config.Y b/proto/rip/config.Y
index 2030a62..f7839f2 100644
--- a/proto/rip/config.Y
+++ b/proto/rip/config.Y
@@ -7,11 +7,7 @@
 /*
 To add:
 
-passive option (== do not send routing updates to this interface)
 version1 switch
-multicast off option for interface
-
-interface mode broadcast/multicast/quiet
 
 */
 
@@ -28,9 +24,11 @@ struct rip_patt *rip_get_iface(void);
 
 CF_DECLS
 
-CF_KEYWORDS(RIP, INFINITY, METRIC, PORT, PERIOD, GARBAGETIME, MODE, MULTICAST, BROADCAST, QUIET, DEFAULT)
+CF_KEYWORDS(RIP, INFINITY, METRIC, PORT, PERIOD, GARBAGETIME, PASSWORD,
+	    MODE, BROADCAST, QUIET, NOLISTEN, VERSION1, 
+	    AUTHENTICATION, NONE, PLAINTEXT, MD5)
 
-%type <i> rip_mode
+%type <i> rip_mode rip_auth
 
 CF_GRAMMAR
 
@@ -49,15 +47,22 @@ RIP_CFG:
  | RIP_CFG PORT expr ';'	{ RIP_CFG->port = $3; }
  | RIP_CFG PERIOD expr ';'	{ RIP_CFG->period = $3; }
  | RIP_CFG GARBAGETIME expr ';' { RIP_CFG->garbage_time = $3; }
+ | RIP_CFG PASSWORD TEXT ';'	{ RIP_CFG->password = $3; }
+ | RIP_CFG AUTHENTICATION rip_auth ';' {RIP_CFG->authtype = $3; }
  | RIP_CFG rip_iface_list ';'
  ;
 
+rip_auth:
+   PLAINTEXT { $$=AT_PLAINTEXT; }
+ | MD5 { $$=AT_MD5; }
+ | NONE { $$=AT_NONE; }
+ ;
 
 rip_mode: 
-    MULTICAST { $$=IM_MULTICAST; }
-  | BROADCAST { $$=IM_BROADCAST; }
-  | QUIET     { $$=IM_QUIET; }
-  | DEFAULT   { $$=IM_DEFAULT; }
+    BROADCAST { $$|=IM_BROADCAST; }
+  | QUIET     { $$|=IM_QUIET; }
+  | NOLISTEN  { $$|=IM_NOLISTEN; }
+  | VERSION1  { $$|=IM_VERSION1 | IM_BROADCAST; }
  ;
 
 rip_iface_item:
diff --git a/proto/rip/rip.c b/proto/rip/rip.c
index f7978ce..4a3e10a 100644
--- a/proto/rip/rip.c
+++ b/proto/rip/rip.c
@@ -1,7 +1,7 @@
 /*
  *	Rest in pieces - RIP protocol
  *
- *	Copyright (c) 1998 Pavel Machek <pavel@ucw.cz>
+ *	Copyright (c) 1998, 1999 Pavel Machek <pavel@ucw.cz>
  *
  *	Can be freely distributed and used under the terms of the GNU GPL.
  */
@@ -75,7 +75,7 @@ rip_tx( sock *s )
     packet->heading.version = RIP_V2;
     packet->heading.unused  = 0;
 
-    i = 0;
+    i = !!P_CF->authtype;
     FIB_ITERATE_START(&P->rtable, &c->iter, z) {
       struct rip_entry *e = (struct rip_entry *) z;
       DBG( "." );
@@ -103,6 +103,9 @@ rip_tx( sock *s )
 
   break_loop:
 
+    if (P_CF->authtype)
+      rip_outgoing_authentication(p, &packet->block[0], packet, i);
+
     DBG( ", sending %d blocks, ", i );
 
     if (ipa_nonzero(c->daddr))
@@ -170,13 +173,6 @@ find_interface(struct proto *p, struct iface *what)
  * Input processing
  */
 
-static int
-process_authentication( struct proto *p, struct rip_block *block )
-{
-  /* FIXME: Should do md5 authentication */
-  return 0;
-}
-
 /* Let main routing table know about our new entry */
 static void
 advertise_entry( struct proto *p, struct rip_block *b, ip_addr whotoldme )
@@ -289,7 +285,7 @@ rip_process_packet( struct proto *p, struct rip_packet *packet, int num, ip_addr
 	    struct rip_block *block = &packet->block[i];
 	    if (block->family == 0xffff)
 	      if (!i) {
-		if (process_authentication(p, block))
+		if (rip_incoming_authentication(p, block, packet, num))
 		  BAD( "Authentication failed" );
 	      } else BAD( "Authentication is not the first!" );
 	    ipa_ntoh( block->network );
@@ -372,7 +368,7 @@ rip_timer(timer *t)
       struct iface *iface = rif->iface;
 
       if (!iface) continue;
-      if (rif->patt->mode == IM_QUIET) continue;
+      if (rif->patt->mode & IM_QUIET) continue;
       if (!(iface->flags & IF_UP)) continue;
       if (iface->flags & (IF_IGNORE | IF_LOOPBACK)) continue;
 
@@ -400,7 +396,7 @@ rip_start(struct proto *p)
   P->timer->recurrent = P_CF->period; 
   P->timer->hook = rip_timer;
   tm_start( P->timer, 5 );
-  rif = new_iface(p, NULL, 0);	/* Initialize dummy interface */
+  rif = new_iface(p, NULL, 0, NULL);	/* Initialize dummy interface */
   add_head( &P->interfaces, NODE rif );
   CHK_MAGIC;
 
@@ -460,19 +456,20 @@ kill_iface(struct proto *p, struct rip_interface *i)
  * new maybe null if we are creating initial send socket 
  */
 struct rip_interface *
-new_iface(struct proto *p, struct iface *new, unsigned long flags)
+new_iface(struct proto *p, struct iface *new, unsigned long flags, struct iface_patt *patt )
 {
   struct rip_interface *rif;
-  int want_multicast;
+  int want_multicast = 0;
 
   rif = mb_alloc(p->pool, sizeof( struct rip_interface ));
   rif->iface = new;
   rif->proto = p;
   rif->busy = NULL;
+  rif->patt = (struct rip_patt *) patt;
 
-  want_multicast = 0 && (flags & IF_MULTICAST);
-  /* FIXME: should have config option to disable this one */
-  /* FIXME: lookup multicasts over unnumbered links */
+  if (rif->patt)
+    want_multicast = (!(rif->patt->mode & IM_BROADCAST)) && (flags & IF_MULTICAST);
+  /* lookup multicasts over unnumbered links - no: rip is not defined over unnumbered links */
 
   rif->sock = sk_new( p->pool );
   rif->sock->type = want_multicast?SK_UDP_MC:SK_UDP;
@@ -489,19 +486,18 @@ new_iface(struct proto *p, struct iface *new, unsigned long flags)
   rif->sock->ttl = 1; /* FIXME: care must be taken not to send requested responses from this socket */
 
   if (want_multicast)
-    rif->sock->daddr = ipa_from_u32(0x7f000001); /* FIXME: must lookup address in rfc's */
+    rif->sock->daddr = ipa_from_u32(0xe0000009);
   if (flags & IF_BROADCAST)
     rif->sock->daddr = new->addr->brd;
-  if (flags & IF_UNNUMBERED)
+  if (flags & IF_UNNUMBERED)	/* Hmm, rip is not defined over unnumbered links */
     rif->sock->daddr = new->addr->opposite;
 
-  if (!ipa_nonzero(rif->sock->daddr))
-    log( L_WARN "RIP: interface %s is too strange for me", rif->iface ? rif->iface->name : "(dummy)" );
-  /* FIXME: Should ignore the interface instead of blindly trying to bind on it */
-
-  if (sk_open(rif->sock)<0)
-    die( "RIP/%s: could not listen on %s", P_NAME, rif->iface ? rif->iface->name : "(dummy)" );
-  /* FIXME: Should not be fatal, since the interface might have gone */
+  if (!ipa_nonzero(rif->sock->daddr)) {
+    log( L_WARN "RIP/%s: interface %s is too strange for me", P_NAME, rif->iface ? rif->iface->name : "(dummy)" );
+  } else
+    if (!(rif->patt->mode & IM_NOLISTEN))
+      if (sk_open(rif->sock)<0)
+	log( L_WARN "RIP/%s: could not listen on %s", P_NAME, rif->iface ? rif->iface->name : "(dummy)" );
   
   return rif;
 }
@@ -526,8 +522,7 @@ rip_if_notify(struct proto *p, unsigned c, struct iface *iface)
 
     if (!k) return; /* We are not interested in this interface */
     DBG("adding interface %s\n", iface->name );
-    rif = new_iface(p, iface, iface->flags);
-    rif->patt = (void *) k;
+    rif = new_iface(p, iface, iface->flags, k);
     add_head( &P->interfaces, NODE rif );
   }
 }
@@ -608,6 +603,8 @@ rip_init_config(struct rip_proto_config *c)
   c->port	= 520;
   c->period	= 30;
   c->garbage_time = 120+180;
+  c->password	= "PASSWORD";
+  c->authtype	= AT_NONE;
 }
 
 static void
diff --git a/proto/rip/rip.h b/proto/rip/rip.h
index 9c66981..a413f71 100644
--- a/proto/rip/rip.h
+++ b/proto/rip/rip.h
@@ -69,10 +69,11 @@ struct rip_interface {
 
   int metric;		/* User configurable data */
   int mode;
-#define IM_DEFAULT 0
-#define IM_QUIET 1
-#define IM_MULTICAST 2
-#define IM_BROADCAST 3
+#define IM_MULTICAST 1
+#define IM_BROADCAST 2
+#define IM_QUIET 4
+#define IM_NOLISTEN 8
+#define IM_VERSION1 16
 };
 
 struct rip_patt {
@@ -90,6 +91,12 @@ struct rip_proto_config {
   int port;
   int period;
   int garbage_time;
+
+  char *password;
+  int authtype;
+#define AT_NONE 0
+#define AT_PLAINTEXT 2
+#define AT_MD5 1234	/* FIXME: get a real number for this one */
 };
 
 struct rip_proto {
@@ -108,4 +115,9 @@ struct rip_proto {
 
 void rip_init_instance(struct proto *p);
 void rip_init_config(struct rip_proto_config *c);
-struct rip_interface *new_iface(struct proto *p, struct iface *new, unsigned long flags);
+struct rip_interface *new_iface(struct proto *p, struct iface *new, unsigned long flags, struct iface_patt *patt);
+
+/* Authentication functions */
+
+int rip_incoming_authentication( struct proto *p, struct rip_block *block, struct rip_packet *packet, int num );
+void rip_outgoing_authentication( struct proto *p, struct rip_block *block, struct rip_packet *packet, int num );