Index: libunbound/context.c
===================================================================
--- libunbound/context.c	(revision 2912)
+++ libunbound/context.c	(working copy)
@@ -124,7 +124,7 @@
 }
 
 struct ctx_query* 
-context_new(struct ub_ctx* ctx, char* name, int rrtype, int rrclass, 
+context_new(struct ub_ctx* ctx, const char* name, int rrtype, int rrclass, 
 	ub_callback_t cb, void* cbarg)
 {
 	struct ctx_query* q = (struct ctx_query*)calloc(1, sizeof(*q));
Index: libunbound/context.h
===================================================================
--- libunbound/context.h	(revision 2912)
+++ libunbound/context.h	(working copy)
@@ -234,7 +234,7 @@
  * @param cbarg: user arg for async queries.
  * @return new ctx_query or NULL for malloc failure.
  */
-struct ctx_query* context_new(struct ub_ctx* ctx, char* name, int rrtype,
+struct ctx_query* context_new(struct ub_ctx* ctx, const char* name, int rrtype,
         int rrclass, ub_callback_t cb, void* cbarg);
 
 /**
Index: libunbound/libunbound.c
===================================================================
--- libunbound/libunbound.c	(revision 2912)
+++ libunbound/libunbound.c	(working copy)
@@ -229,7 +229,7 @@
 }
 
 int 
-ub_ctx_set_option(struct ub_ctx* ctx, char* opt, char* val)
+ub_ctx_set_option(struct ub_ctx* ctx, const char* opt, const char* val)
 {
 	lock_basic_lock(&ctx->cfglock);
 	if(ctx->finalized) {
@@ -245,7 +245,7 @@
 }
 
 int
-ub_ctx_get_option(struct ub_ctx* ctx, char* opt, char** str)
+ub_ctx_get_option(struct ub_ctx* ctx, const char* opt, char** str)
 {
 	int r;
 	lock_basic_lock(&ctx->cfglock);
@@ -258,7 +258,7 @@
 }
 
 int 
-ub_ctx_config(struct ub_ctx* ctx, char* fname)
+ub_ctx_config(struct ub_ctx* ctx, const char* fname)
 {
 	lock_basic_lock(&ctx->cfglock);
 	if(ctx->finalized) {
@@ -274,7 +274,7 @@
 }
 
 int 
-ub_ctx_add_ta(struct ub_ctx* ctx, char* ta)
+ub_ctx_add_ta(struct ub_ctx* ctx, const char* ta)
 {
 	char* dup = strdup(ta);
 	if(!dup) return UB_NOMEM;
@@ -294,7 +294,7 @@
 }
 
 int 
-ub_ctx_add_ta_file(struct ub_ctx* ctx, char* fname)
+ub_ctx_add_ta_file(struct ub_ctx* ctx, const char* fname)
 {
 	char* dup = strdup(fname);
 	if(!dup) return UB_NOMEM;
@@ -314,7 +314,7 @@
 }
 
 int 
-ub_ctx_trustedkeys(struct ub_ctx* ctx, char* fname)
+ub_ctx_trustedkeys(struct ub_ctx* ctx, const char* fname)
 {
 	char* dup = strdup(fname);
 	if(!dup) return UB_NOMEM;
@@ -547,7 +547,7 @@
 }
 
 int 
-ub_resolve(struct ub_ctx* ctx, char* name, int rrtype, 
+ub_resolve(struct ub_ctx* ctx, const char* name, int rrtype, 
 	int rrclass, struct ub_result** result)
 {
 	struct ctx_query* q;
@@ -591,7 +591,7 @@
 }
 
 int 
-ub_resolve_async(struct ub_ctx* ctx, char* name, int rrtype, 
+ub_resolve_async(struct ub_ctx* ctx, const char* name, int rrtype, 
 	int rrclass, void* mydata, ub_callback_t callback, int* async_id)
 {
 	struct ctx_query* q;
@@ -732,7 +732,7 @@
 }
 
 int 
-ub_ctx_set_fwd(struct ub_ctx* ctx, char* addr)
+ub_ctx_set_fwd(struct ub_ctx* ctx, const char* addr)
 {
 	struct sockaddr_storage storage;
 	socklen_t stlen;
@@ -804,7 +804,7 @@
 }
 
 int 
-ub_ctx_resolvconf(struct ub_ctx* ctx, char* fname)
+ub_ctx_resolvconf(struct ub_ctx* ctx, const char* fname)
 {
 	FILE* in;
 	int numserv = 0;
@@ -890,7 +890,7 @@
 }
 
 int
-ub_ctx_hosts(struct ub_ctx* ctx, char* fname)
+ub_ctx_hosts(struct ub_ctx* ctx, const char* fname)
 {
 	FILE* in;
 	char buf[1024], ldata[1024];
@@ -1016,7 +1016,8 @@
 }
 
 /* Add a new zone */
-int ub_ctx_zone_add(struct ub_ctx* ctx, char *zone_name, char *zone_type)
+int ub_ctx_zone_add(struct ub_ctx* ctx, const char *zone_name, 
+	const char *zone_type)
 {
 	enum localzone_type t;
 	struct local_zone* z;
@@ -1056,7 +1057,7 @@
 }
 
 /* Remove zone */
-int ub_ctx_zone_remove(struct ub_ctx* ctx, char *zone_name)
+int ub_ctx_zone_remove(struct ub_ctx* ctx, const char *zone_name)
 {   
 	struct local_zone* z;
 	uint8_t* nm;
@@ -1082,7 +1083,7 @@
 }
 
 /* Add new RR data */
-int ub_ctx_data_add(struct ub_ctx* ctx, char *data)
+int ub_ctx_data_add(struct ub_ctx* ctx, const char *data)
 {
 	ldns_buffer* buf;
 	int res = ub_ctx_finalize(ctx);
@@ -1100,7 +1101,7 @@
 }
 
 /* Remove RR data */
-int ub_ctx_data_remove(struct ub_ctx* ctx, char *data)
+int ub_ctx_data_remove(struct ub_ctx* ctx, const char *data)
 {
 	uint8_t* nm;
 	int nmlabs;
Index: libunbound/unbound.h
===================================================================
--- libunbound/unbound.h	(revision 2912)
+++ libunbound/unbound.h	(working copy)
@@ -250,7 +250,7 @@
  * @param val: value of the option.
  * @return: 0 if OK, else error.
  */
-int ub_ctx_set_option(struct ub_ctx* ctx, char* opt, char* val);
+int ub_ctx_set_option(struct ub_ctx* ctx, const char* opt, const char* val);
 
 /**
  * Get an option from the context.
@@ -266,7 +266,7 @@
  * 	returned in the string.
  * @return 0 if OK else an error code (malloc failure, syntax error).
  */
-int ub_ctx_get_option(struct ub_ctx* ctx, char* opt, char** str);
+int ub_ctx_get_option(struct ub_ctx* ctx, const char* opt, char** str);
 
 /**
  * setup configuration for the given context.
@@ -278,7 +278,7 @@
  * 	routines exist.
  * @return: 0 if OK, else error.
  */
-int ub_ctx_config(struct ub_ctx* ctx, char* fname);
+int ub_ctx_config(struct ub_ctx* ctx, const char* fname);
 
 /**
  * Set machine to forward DNS queries to, the caching resolver to use. 
@@ -297,7 +297,7 @@
  * 	If the addr is NULL, forwarding is disabled.
  * @return 0 if OK, else error.
  */
-int ub_ctx_set_fwd(struct ub_ctx* ctx, char* addr);
+int ub_ctx_set_fwd(struct ub_ctx* ctx, const char* addr);
 
 /**
  * Read list of nameservers to use from the filename given.
@@ -313,7 +313,7 @@
  * @param fname: file name string. If NULL "/etc/resolv.conf" is used.
  * @return 0 if OK, else error.
  */
-int ub_ctx_resolvconf(struct ub_ctx* ctx, char* fname);
+int ub_ctx_resolvconf(struct ub_ctx* ctx, const char* fname);
 
 /**
  * Read list of hosts from the filename given.
@@ -326,7 +326,7 @@
  * @param fname: file name string. If NULL "/etc/hosts" is used.
  * @return 0 if OK, else error.
  */
-int ub_ctx_hosts(struct ub_ctx* ctx, char* fname);
+int ub_ctx_hosts(struct ub_ctx* ctx, const char* fname);
 
 /**
  * Add a trust anchor to the given context.
@@ -339,7 +339,7 @@
  * 	[domainname] [TTL optional] [type] [class optional] [rdata contents]
  * @return 0 if OK, else error.
  */
-int ub_ctx_add_ta(struct ub_ctx* ctx, char* ta);
+int ub_ctx_add_ta(struct ub_ctx* ctx, const char* ta);
 
 /**
  * Add trust anchors to the given context.
@@ -350,7 +350,7 @@
  * @param fname: filename of file with keyfile with trust anchors.
  * @return 0 if OK, else error.
  */
-int ub_ctx_add_ta_file(struct ub_ctx* ctx, char* fname);
+int ub_ctx_add_ta_file(struct ub_ctx* ctx, const char* fname);
 
 /**
  * Add trust anchors to the given context.
@@ -362,7 +362,7 @@
  * 	anchors.
  * @return 0 if OK, else error.
  */
-int ub_ctx_trustedkeys(struct ub_ctx* ctx, char* fname);
+int ub_ctx_trustedkeys(struct ub_ctx* ctx, const char* fname);
 
 /**
  * Set debug output (and error output) to the specified stream.
@@ -447,7 +447,7 @@
  * 	in that case (out of memory).
  * @return 0 if OK, else error.
  */
-int ub_resolve(struct ub_ctx* ctx, char* name, int rrtype, 
+int ub_resolve(struct ub_ctx* ctx, const char* name, int rrtype, 
 	int rrclass, struct ub_result** result);
 
 /**
@@ -478,7 +478,7 @@
  *	cancel the query.
  * @return 0 if OK, else error.
  */
-int ub_resolve_async(struct ub_ctx* ctx, char* name, int rrtype, 
+int ub_resolve_async(struct ub_ctx* ctx, const char* name, int rrtype, 
 	int rrclass, void* mydata, ub_callback_t callback, int* async_id);
 
 /**
@@ -525,7 +525,8 @@
  * @param zone_type: type of the zone (like for unbound.conf) in text.
  * @return 0 if OK, else error.
  */
-int ub_ctx_zone_add(struct ub_ctx* ctx, char *zone_name, char *zone_type);
+int ub_ctx_zone_add(struct ub_ctx* ctx, const char *zone_name, 
+	const char *zone_type);
 
 /**
  * Remove zone from local authority info of the library.
@@ -534,7 +535,7 @@
  *	If it does not exist, nothing happens.
  * @return 0 if OK, else error.
  */
-int ub_ctx_zone_remove(struct ub_ctx* ctx, char *zone_name);
+int ub_ctx_zone_remove(struct ub_ctx* ctx, const char *zone_name);
 
 /**
  * Add localdata to the library local authority info.
@@ -544,7 +545,7 @@
  *	"www.example.com IN A 127.0.0.1"
  * @return 0 if OK, else error.
  */
-int ub_ctx_data_add(struct ub_ctx* ctx, char *data);
+int ub_ctx_data_add(struct ub_ctx* ctx, const char *data);
 
 /**
  * Remove localdata from the library local authority info.
@@ -552,7 +553,7 @@
  * @param data: the name to delete all data from, like "www.example.com".
  * @return 0 if OK, else error.
  */
-int ub_ctx_data_remove(struct ub_ctx* ctx, char *data);
+int ub_ctx_data_remove(struct ub_ctx* ctx, const char *data);
 
 /**
  * Get a version string from the libunbound implementation.
