--- a/liboutrt/Makefile	Thu Oct 06 23:31:37 2022 -0800
+++ b/liboutrt/Makefile	Thu Oct 06 23:44:17 2022 -0800
@@ -1,6 +1,6 @@
 CC=	gcc
 CFLAGS=	-O2
-OBJS=	readbin.o refresh.o
+OBJS=	readbin.o refresh.o route_e164.o
 LIB=	liboutrt.a
 
 all:	${LIB}

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/liboutrt/route_e164.c	Thu Oct 06 23:44:17 2022 -0800
@@ -0,0 +1,43 @@
+/*
+ * In this module we implement routing of calls to E.164 numbers.
+ */
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <strings.h>
+#include "../include/out_routes.h"
+
+extern struct out_routes_header outrt_hdr;
+extern struct sip_out_dest *outrt_dest_array;
+extern struct inn_route *outrt_inn_array;
+
+route_e164_number(target_num, destp)
+	char *target_num;
+	struct sip_out_dest **destp;
+{
+	unsigned inn_index;
+	struct inn_route *rec;
+	struct sip_out_dest *dest;
+	char *pp, *tp;
+
+	for (inn_index = 0; inn_index < outrt_hdr.num_inn; inn_index++) {
+		rec = outrt_inn_array + inn_index;
+		pp = rec->prefix;
+		tp = target_num;
+		while (*pp && *pp == *tp) {
+			pp++;
+			tp++;
+		}
+		if (*pp)
+			continue;
+		dest = outrt_dest_array + rec->sip_dest_id;
+		*destp = dest;
+		return 1;
+	}
+	return 0;
+}