Printing of AS paths and community sets.

nest/a-path.c

@@ -9,8 +9,10 @@
 
 #include "nest/bird.h"
 #include "nest/route.h"
+#include "nest/attrs.h"
 #include "lib/resource.h"
 #include "lib/unaligned.h"
+#include "lib/string.h"
 
 struct adata *
 as_path_prepend(struct linpool *pool, struct adata *olda, int as)
@@ -36,3 +38,46 @@ as_path_prepend(struct linpool *pool, struct adata *olda, int as)
   put_u16(newa->data+2, as);
   return newa;
 }
+
+void
+as_path_format(struct adata *path, byte *buf, unsigned int size)
+{
+  byte *p = path->data;
+  byte *e = p + path->length - 8;
+  byte *end = buf + size;
+  int sp = 1;
+  int l, type, isset, as;
+
+  while (p < e)
+    {
+      if (buf > end)
+	{
+	  strcpy(buf, " ...");
+	  return;
+	}
+      isset = (*p++ == AS_PATH_SET);
+      l = *p++;
+      if (isset)
+	{
+	  if (!sp)
+	    *buf++ = ' ';
+	  *buf++ = '{';
+	  sp = 0;
+	}
+      while (l-- && buf <= end)
+	{
+	  if (!sp)
+	    *buf++ = ' ';
+	  buf += bsprintf(buf, "%d", get_u16(p));
+	  p += 2;
+	  sp = 0;
+	}
+      if (isset)
+	{
+	  *buf++ = ' ';
+	  *buf++ = '}';
+	  sp = 0;
+	}
+    }
+  *buf = 0;
+}

nest/a-set.c

@@ -9,4 +9,32 @@
 
 #include "nest/bird.h"
 #include "nest/route.h"
+#include "nest/attrs.h"
 #include "lib/resource.h"
+#include "lib/string.h"
+
+void
+int_set_format(struct adata *set, byte *buf, unsigned int size)
+{
+  u32 *z = (u32 *) set->data;
+  int l = set->length / 4;
+  int sp = 1;
+  byte *end = buf + size - 16;
+
+  while (l--)
+    {
+      if (sp)
+	{
+	  sp = 0;
+	  *buf++ = ' ';
+	}
+      if (buf > end)
+	{
+	  strcpy(buf, "...");
+	  return;
+	}
+      buf += bsprintf(buf, "%d:%d", *z/65536, *z & 0xffff);
+      z++;
+    }
+  *buf = 0;
+}

nest/attrs.h

@@ -12,5 +12,13 @@
 /* a-path.c */
 
 struct adata *as_path_prepend(struct linpool *pool, struct adata *olda, int as);
+void as_path_format(struct adata *path, byte *buf, unsigned int size);
+
+#define AS_PATH_SET		1	/* Types of path segments */
+#define AS_PATH_SEQUENCE	2
+
+/* a-set.c */
+
+void int_set_format(struct adata *set, byte *buf, unsigned int size);
 
 #endif

nest/route.h

@@ -325,6 +325,7 @@ void ea_merge(ea_list *from, ea_list *to); /* Merge sub-lists to allocated buffe
 int ea_same(ea_list *x, ea_list *y);	/* Test whether two ea_lists are identical */
 unsigned int ea_hash(ea_list *e);	/* Calculate 16-bit hash value */
 void ea_format(eattr *e, byte *buf);
+#define EA_FORMAT_BUF_SIZE 256
 
 void rta_init(void);
 rta *rta_lookup(rta *);			/* Get rta equivalent to this one, uc++ */

nest/rt-attr.c

@@ -13,6 +13,7 @@
 #include "nest/protocol.h"
 #include "nest/iface.h"
 #include "nest/cli.h"
+#include "nest/attrs.h"
 #include "lib/resource.h"
 #include "lib/string.h"
 
@@ -240,8 +241,9 @@ ea_format(eattr *e, byte *buf)
 {
   struct protocol *p;
   int status = GA_UNKNOWN;
-  unsigned int i, l;
+  unsigned int i;
   struct adata *ad = (e->type & EAF_EMBEDDED) ? NULL : e->u.ptr;
+  byte *end = buf + EA_FORMAT_BUF_SIZE - 1;
 
   if (p = attr_class_to_protocol[EA_PROTO(e->id)])
     {
@@ -264,24 +266,30 @@ ea_format(eattr *e, byte *buf)
 	  bsprintf(buf, "%d", e->u.data);
 	  break;
 	case EAF_TYPE_OPAQUE:
-	  l = (ad->length < 16) ? ad->length : 16;
-	  for(i=0; i<l; i++)
+	  for(i=0; i<ad->length; i++)
+	    {
+	      if (buf > end - 8)
 		{
-	      buf += bsprintf(buf, "%02x", ad->data[i]);
-	      if (i < l)
-		*buf++ = ' ';
-	    }
-	  if (l < ad->length)
 		  strcpy(buf, " ...");
 		  break;
+		}
+	      if (i)
+		*buf++ = ' ';
+	      buf += bsprintf(buf, "%02x", ad->data[i]);
+	    }
+	  break;
 	case EAF_TYPE_IP_ADDRESS:
 	  bsprintf(buf, "%I", *(ip_addr *) ad->data);
 	  break;
 	case EAF_TYPE_ROUTER_ID:
 	  bsprintf(buf, "%08x", e->u.data); /* FIXME: Better printing of router ID's */
 	  break;
-	case EAF_TYPE_AS_PATH:		/* FIXME */
-	case EAF_TYPE_INT_SET:		/* FIXME */
+	case EAF_TYPE_AS_PATH:
+	  as_path_format(ad, buf, end - buf);
+	  break;
+	case EAF_TYPE_INT_SET:
+	  int_set_format(ad, buf, end - buf);
+	  break;
 	case EAF_TYPE_UNDEF:
 	default:
 	  bsprintf(buf, "<type %02x>", e->type);
@@ -542,7 +550,7 @@ rta_show(struct cli *c, rta *a)
   static char *cast_names[] = { "unicast", "broadcast", "multicast", "anycast" };
   ea_list *eal;
   int i;
-  byte buf[256];
+  byte buf[EA_FORMAT_BUF_SIZE];
 
   cli_printf(c, -1008, "\tType: %s %s %s", src_names[a->source], cast_names[a->cast], ip_scope_text(a->scope));
   for(eal=a->eattrs; eal; eal=eal->next)