From c51fddefe57aa26f0b2c637a671691d743ce2a41 Mon Sep 17 00:00:00 2001
From: Yureka <yuka@yuka.dev>
Date: Wed, 16 Oct 2024 18:01:36 +0200
Subject: [PATCH] filter out ASN 0 in juniper as-lists (#117)

Fixes error "RPD Policy: Invalid AS 0"
---
 printer.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/printer.c b/printer.c
index 4e738da..174e683 100644
--- a/printer.c
+++ b/printer.c
@@ -300,12 +300,15 @@ bgpq4_print_juniper_aslist(FILE *f, struct bgpq_expander *b)
 
 	RB_FOREACH(asne, asn_tree, &b->asnlist) {
 		if (!nc) {
-			fprintf(f, "  as-list a%u members [ %u",
-			    lineNo, asne->asn);
-		} else {
-			fprintf(f," %u", asne->asn);
+			fprintf(f, "  as-list a%u members [",
+			    lineNo);
 		}
 
+		// Filter out AS 0
+		// "error: RPD Policy: Invalid AS 0"
+		if (asne->asn != 0)
+			fprintf(f," %u", asne->asn);
+
 		nc++;
 
 		if (nc == b->aswidth) {