Use const for host_resolution_config

include/aws/io/channel_bootstrap.h

@@ -82,7 +82,7 @@ struct aws_client_bootstrap_options {
     /* Optional. If none is provided then default settings are used.
      * This object is deep-copied by bootstrap.
      * */
-    struct aws_host_resolution_config *host_resolution_config;
+    const struct aws_host_resolution_config *host_resolution_config;
 
     /* Optional. If provided, callback is invoked when client bootstrap has completely shut down. */
     aws_client_bootstrap_shutdown_complete_fn *on_shutdown_complete;

include/aws/io/host_resolver.h

@@ -86,7 +86,7 @@ struct aws_host_resolver_vtable {
         struct aws_host_resolver *resolver,
         const struct aws_string *host_name,
         aws_on_host_resolved_result_fn *res,
-        struct aws_host_resolution_config *config,
+        const struct aws_host_resolution_config *config,
         void *user_data);
     /** gives your implementation a hint that an address has some failed connections occuring. Do whatever you want (or
      * nothing) about it.
@@ -204,7 +204,7 @@ AWS_IO_API int aws_host_resolver_resolve_host(
     struct aws_host_resolver *resolver,
     const struct aws_string *host_name,
     aws_on_host_resolved_result_fn *res,
-    struct aws_host_resolution_config *config,
+    const struct aws_host_resolution_config *config,
     void *user_data);
 
 /**

source/host_resolver.c

@@ -69,7 +69,7 @@ int aws_host_resolver_resolve_host(
     struct aws_host_resolver *resolver,
     const struct aws_string *host_name,
     aws_on_host_resolved_result_fn *res,
-    struct aws_host_resolution_config *config,
+    const struct aws_host_resolution_config *config,
     void *user_data) {
     AWS_ASSERT(resolver->vtable && resolver->vtable->resolve_host);
     return resolver->vtable->resolve_host(resolver, host_name, res, config, user_data);
@@ -1252,7 +1252,7 @@ static inline int create_and_init_host_entry(
     struct aws_host_resolver *resolver,
     const struct aws_string *host_name,
     aws_on_host_resolved_result_fn *res,
-    struct aws_host_resolution_config *config,
+    const struct aws_host_resolution_config *config,
     uint64_t timestamp,
     void *user_data) {
     struct host_entry *new_host_entry = aws_mem_calloc(resolver->allocator, 1, sizeof(struct host_entry));
@@ -1381,7 +1381,7 @@ static int default_resolve_host(
     struct aws_host_resolver *resolver,
     const struct aws_string *host_name,
     aws_on_host_resolved_result_fn *res,
-    struct aws_host_resolution_config *config,
+    const struct aws_host_resolution_config *config,
     void *user_data) {
     int result = AWS_OP_SUCCESS;