Prints full community lists during 'show route all'.

6 files changed, 101 insertions, 60 deletions

diff --git a/nest/a-set.c b/nest/a-set.c
index f41b163d..3cbd6355 100644
--- a/nest/a-set.c
+++ b/nest/a-set.c
@@ -13,33 +13,53 @@
 #include "lib/resource.h"
 #include "lib/string.h"
 
-void
-int_set_format(struct adata *set, int way, byte *buf, unsigned int size)
+/**
+ * int_set_format - format an &set for printing
+ * @set: set attribute to be formatted
+ * @way: style of format (0 for router ID list, 1 for community list)
+ * @from: starting position in set
+ * @buf: destination buffer
+ * @size: size of buffer
+ *
+ * This function takes a set attribute and formats it. @way specifies
+ * the style of format (router ID / community). @from argument can be
+ * used to specify the first printed value for the purpose of printing
+ * untruncated sets even with smaller buffers. If the output fits in
+ * the buffer, 0 is returned, otherwise the position of the first not
+ * printed item is returned. This value can be used as @from argument
+ * in subsequent calls. If truncated output suffices, -1 can be
+ * instead used as @from, in that case " ..." is eventually added at
+ * the buffer to indicate truncation.
+ */
+int
+int_set_format(struct adata *set, int way, int from, byte *buf, unsigned int size)
 {
   u32 *z = (u32 *) set->data;
-  int l = set->length / 4;
-  int sp = 1;
-  byte *end = buf + size - 16;
+  byte *end = buf + size - 24;
+  int to = set->length / 4;
+  int i;
 
-  while (l--)
+  for (i = MAX(from, 0); i < to; i++)
     {
-      if (!sp)
-	*buf++ = ' ';
       if (buf > end)
 	{
-	  strcpy(buf, "...");
-	  return;
+	  if (from < 0)
+	    strcpy(buf, " ...");
+	  else
+	    *buf = 0;
+	  return i;
 	}
 
+      if (i > from)
+	*buf++ = ' ';
+
       if (way)
-	buf += bsprintf(buf, "(%d,%d)", *z >> 16, *z & 0xffff);
+	buf += bsprintf(buf, "(%d,%d)", z[i] >> 16, z[i] & 0xffff);
       else
-	buf += bsprintf(buf, "%R", *z);
-
-      z++;
-      sp = 0;
+	buf += bsprintf(buf, "%R", z[i]);
     }
   *buf = 0;
+  return 0;
 }
 
 int
diff --git a/nest/attrs.h b/nest/attrs.h
index 16fb35af..6ce5755f 100644
--- a/nest/attrs.h
+++ b/nest/attrs.h
@@ -50,7 +50,7 @@ int as_path_match(struct adata *path, struct f_path_mask *mask);
 
 /* a-set.c */
 
-void int_set_format(struct adata *set, int way, byte *buf, unsigned int size);
+int int_set_format(struct adata *set, int way, int from, byte *buf, unsigned int size);
 struct adata *int_set_add(struct linpool *pool, struct adata *list, u32 val);
 int int_set_contains(struct adata *list, u32 val);
 struct adata *int_set_del(struct linpool *pool, struct adata *list, u32 val);
diff --git a/nest/cli.c b/nest/cli.c
index 4d2b8fd0..a61518b5 100644
--- a/nest/cli.c
+++ b/nest/cli.c
@@ -120,7 +120,7 @@ void
 cli_printf(cli *c, int code, char *msg, ...)
 {
   va_list args;
-  byte buf[1024];
+  byte buf[CLI_LINE_SIZE];
   int cd = code;
   int size, cnt;
 
diff --git a/nest/cli.h b/nest/cli.h
index 57414a29..ea64680a 100644
--- a/nest/cli.h
+++ b/nest/cli.h
@@ -16,6 +16,9 @@
 #define CLI_TX_BUF_SIZE 4096
 #define CLI_MAX_ASYNC_QUEUE 4096
 
+#define CLI_MSG_SIZE 500
+#define CLI_LINE_SIZE 512
+
 struct cli_out {
   struct cli_out *next;
   byte *wpos, *outpos, *end;
diff --git a/nest/route.h b/nest/route.h
index 236882ec..c77fe417 100644
--- a/nest/route.h
+++ b/nest/route.h
@@ -394,8 +394,6 @@ unsigned ea_scan(ea_list *);		/* How many bytes do we need for merged ea_list */
 void ea_merge(ea_list *from, ea_list *to); /* Merge sub-lists to allocated buffer */
 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
 ea_list *ea_append(ea_list *to, ea_list *what);
 
 int mpnh__same(struct mpnh *x, struct mpnh *y); /* Compare multipath nexthops */
diff --git a/nest/rt-attr.c b/nest/rt-attr.c
index 5a7dd09a..486a543d 100644
--- a/nest/rt-attr.c
+++ b/nest/rt-attr.c
@@ -430,81 +430,105 @@ get_generic_attr(eattr *a, byte **buf, int buflen UNUSED)
   return GA_UNKNOWN;
 }
 
+static inline void
+opaque_format(struct adata *ad, byte *buf, unsigned int size)
+{
+  byte *bound = buf + size - 10;
+  int i;
+
+  for(i = 0; i < ad->length; i++)
+    {
+      if (buf > bound)
+	{
+	  strcpy(buf, " ...");
+	  return;
+	}
+      if (i)
+	*buf++ = ' ';
+
+      buf += bsprintf(buf, "%02x", ad->data[i]);
+    }
+
+  *buf = 0;
+  return;
+}
+
+static inline void
+ea_show_int_set(struct cli *c, struct adata *ad, int way, byte *pos, byte *buf, byte *end)
+{
+  int i = int_set_format(ad, way, 0, pos, end - pos);
+  cli_printf(c, -1012, "%s", buf);
+  while (i)
+    {
+      i = int_set_format(ad, way, i, buf, end - buf - 1);
+      cli_printf(c, -1012, "\t%s", buf);
+    }
+}
+
 /**
- * ea_format - format an &eattr for printing
- * @e: attribute to be formatted
- * @buf: destination buffer of size %EA_FORMAT_BUF_SIZE
+ * ea_show - print an &eattr to CLI
+ * @c: destination CLI
+ * @e: attribute to be printed
  *
- * This function takes an extended attribute represented by its
- * &eattr structure and formats it nicely for printing according
- * to the type information.
+ * This function takes an extended attribute represented by its &eattr
+ * structure and prints it to the CLI according to the type information.
  *
  * If the protocol defining the attribute provides its own
  * get_attr() hook, it's consulted first.
  */
 void
-ea_format(eattr *e, byte *buf)
+ea_show(struct cli *c, eattr *e)
 {
   struct protocol *p;
   int status = GA_UNKNOWN;
-  unsigned int i;
   struct adata *ad = (e->type & EAF_EMBEDDED) ? NULL : e->u.ptr;
-  byte *end = buf + EA_FORMAT_BUF_SIZE - 1;
+  byte buf[CLI_MSG_SIZE];
+  byte *pos = buf, *end = buf + sizeof(buf);
 
   if (p = attr_class_to_protocol[EA_PROTO(e->id)])
     {
-      buf += bsprintf(buf, "%s.", p->name);
+      pos += bsprintf(pos, "%s.", p->name);
       if (p->get_attr)
-	status = p->get_attr(e, buf, end - buf);
-      buf += strlen(buf);
+	status = p->get_attr(e, pos, end - pos);
+      pos += strlen(pos);
     }
   else if (EA_PROTO(e->id))
-    buf += bsprintf(buf, "%02x.", EA_PROTO(e->id));
+    pos += bsprintf(pos, "%02x.", EA_PROTO(e->id));
   else 
-    status = get_generic_attr(e, &buf, end - buf);
+    status = get_generic_attr(e, &pos, end - pos);
 
   if (status < GA_NAME)
-    buf += bsprintf(buf, "%02x", EA_ID(e->id));
+    pos += bsprintf(pos, "%02x", EA_ID(e->id));
   if (status < GA_FULL)
     {
-      *buf++ = ':';
-      *buf++ = ' ';
+      *pos++ = ':';
+      *pos++ = ' ';
       switch (e->type & EAF_TYPE_MASK)
 	{
 	case EAF_TYPE_INT:
-	  bsprintf(buf, "%u", e->u.data);
+	  bsprintf(pos, "%u", e->u.data);
 	  break;
 	case EAF_TYPE_OPAQUE:
-	  *buf = 0;
-	  for(i=0; i<ad->length; i++)
-	    {
-	      if (buf > end - 8)
-		{
-		  strcpy(buf, " ...");
-		  break;
-		}
-	      if (i)
-		*buf++ = ' ';
-	      buf += bsprintf(buf, "%02x", ad->data[i]);
-	    }
+	  opaque_format(ad, pos, end - pos);
 	  break;
 	case EAF_TYPE_IP_ADDRESS:
-	  bsprintf(buf, "%I", *(ip_addr *) ad->data);
+	  bsprintf(pos, "%I", *(ip_addr *) ad->data);
 	  break;
 	case EAF_TYPE_ROUTER_ID:
-	  bsprintf(buf, "%R", e->u.data);
+	  bsprintf(pos, "%R", e->u.data);
 	  break;
 	case EAF_TYPE_AS_PATH:
-	  as_path_format(ad, buf, end - buf);
+	  as_path_format(ad, pos, end - pos);
 	  break;
 	case EAF_TYPE_INT_SET:
-	  int_set_format(ad, 1, buf, end - buf);
-	  break;
+	  ea_show_int_set(c, ad, 1, pos, buf, end);
+	  return;
 	case EAF_TYPE_UNDEF:
 	default:
-	  bsprintf(buf, "<type %02x>", e->type);
+	  bsprintf(pos, "<type %02x>", e->type);
 	}
     }
+  cli_printf(c, -1012, "%s", buf);
 }
 
 /**
@@ -834,17 +858,13 @@ rta_show(struct cli *c, rta *a, ea_list *eal)
 			       "RIP", "OSPF", "OSPF-IA", "OSPF-E1", "OSPF-E2", "BGP", "pipe" };
   static char *cast_names[] = { "unicast", "broadcast", "multicast", "anycast" };
   int i;
-  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));
   if (!eal)
     eal = a->eattrs;
   for(; eal; eal=eal->next)
     for(i=0; i<eal->count; i++)
-      {
-	ea_format(&eal->attrs[i], buf);
-	cli_printf(c, -1012, "\t%s", buf);
-      }
+      ea_show(c, &eal->attrs[i]);
 }
 
 /**