SSL channel args work with client config again

src/core/channel/channel_args.c

@@ -62,7 +62,8 @@ static grpc_arg copy_arg(const grpc_arg *src) {
 }
 
 grpc_channel_args *grpc_channel_args_copy_and_add(const grpc_channel_args *src,
-                                                  const grpc_arg *to_add) {
+                                                  const grpc_arg *to_add,
+                                                  size_t num_to_add) {
   grpc_channel_args *dst = gpr_malloc(sizeof(grpc_channel_args));
   size_t i;
   size_t src_num_args = (src == NULL) ? 0 : src->num_args;
@@ -71,17 +72,24 @@ grpc_channel_args *grpc_channel_args_copy_and_add(const grpc_channel_args *src,
     dst->args = NULL;
     return dst;
   }
-  dst->num_args = src_num_args + ((to_add == NULL) ? 0 : 1);
+  dst->num_args = src_num_args + num_to_add;
   dst->args = gpr_malloc(sizeof(grpc_arg) * dst->num_args);
   for (i = 0; i < src_num_args; i++) {
     dst->args[i] = copy_arg(&src->args[i]);
   }
-  if (to_add != NULL) dst->args[src_num_args] = copy_arg(to_add);
+  for (i = 0; i < num_to_add; i++) {
+    dst->args[i + src_num_args] = copy_arg(&to_add[i]);
+  }
   return dst;
 }
 
 grpc_channel_args *grpc_channel_args_copy(const grpc_channel_args *src) {
-  return grpc_channel_args_copy_and_add(src, NULL);
+  return grpc_channel_args_copy_and_add(src, NULL, 0);
+}
+
+grpc_channel_args *grpc_channel_args_merge(const grpc_channel_args *a,
+                                           const grpc_channel_args *b) {
+  return grpc_channel_args_copy_and_add(a, b->args, b->num_args);
 }
 
 void grpc_channel_args_destroy(grpc_channel_args *a) {
@@ -137,5 +145,5 @@ void grpc_channel_args_set_compression_level(
   tmp.type = GRPC_ARG_INTEGER;
   tmp.key = GRPC_COMPRESSION_LEVEL_ARG;
   tmp.value.integer = level;
-  *a = grpc_channel_args_copy_and_add(*a, &tmp);
+  *a = grpc_channel_args_copy_and_add(*a, &tmp, 1);
 }

src/core/channel/channel_args.h

@@ -43,8 +43,10 @@ grpc_channel_args *grpc_channel_args_copy(const grpc_channel_args *src);
 /** Copy some arguments and add the to_add parameter in the end.
    If to_add is NULL, it is equivalent to call grpc_channel_args_copy. */
 grpc_channel_args *grpc_channel_args_copy_and_add(const grpc_channel_args *src,
-                                                  const grpc_arg *to_add);
+                                                  const grpc_arg *to_add,
+                                                  size_t num_to_add);
 
+/** Copy args from a then args from b into a new channel args */
 grpc_channel_args *grpc_channel_args_merge(const grpc_channel_args *a, const grpc_channel_args *b);
 
 /** Destroy arguments created by grpc_channel_args_copy */

src/core/security/client_auth_filter.c

@@ -291,7 +291,6 @@ static void init_channel_elem(grpc_channel_element *elem,grpc_channel *master,
   /* The first and the last filters tend to be implemented differently to
      handle the case that there's no 'next' filter to call on the up or down
      path */
-  GPR_ASSERT(!is_first);
   GPR_ASSERT(!is_last);
   GPR_ASSERT(sc != NULL);
 

src/core/security/credentials.c

@@ -225,7 +225,7 @@ static grpc_security_status ssl_create_security_connector(
   arg.type = GRPC_ARG_STRING;
   arg.key = GRPC_ARG_HTTP2_SCHEME;
   arg.value.string = "https";
-  *new_args = grpc_channel_args_copy_and_add(args, &arg);
+  *new_args = grpc_channel_args_copy_and_add(args, &arg, 1);
   return status;
 }
 

src/core/security/server_secure_chttp2.c

@@ -83,7 +83,7 @@ static void setup_transport(void *statep,
   grpc_server_secure_state *state = statep;
   grpc_arg connector_arg = grpc_security_connector_to_arg(state->sc);
   grpc_channel_args *args_copy = grpc_channel_args_copy_and_add(
-      grpc_server_get_channel_args(state->server), &connector_arg);
+      grpc_server_get_channel_args(state->server), &connector_arg, 1);
   grpc_server_setup_transport(state->server, transport, extra_filters,
                                        GPR_ARRAY_SIZE(extra_filters), mdctx,
                                        args_copy);

src/core/surface/channel_create.c

@@ -102,6 +102,7 @@ typedef struct {
   grpc_subchannel_factory base;
   gpr_refcount refs;
   grpc_mdctx *mdctx;
+  grpc_channel_args *merge_args;
 } subchannel_factory;
 
 static void subchannel_factory_ref(grpc_subchannel_factory *scf) {
@@ -120,13 +121,17 @@ static void subchannel_factory_unref(grpc_subchannel_factory *scf) {
 static grpc_subchannel *subchannel_factory_create_subchannel(grpc_subchannel_factory *scf, grpc_subchannel_args *args) {
   subchannel_factory *f = (subchannel_factory *)scf;
   connector *c = gpr_malloc(sizeof(*c));
+  grpc_channel_args *final_args =
+      grpc_channel_args_merge(args->args, f->merge_args);
   grpc_subchannel *s;
   memset(c, 0, sizeof(*c));
   c->base.vtable = &connector_vtable;
   gpr_ref_init(&c->refs, 1);
   args->mdctx = f->mdctx;
+  args->args = final_args;
   s = grpc_subchannel_create(&c->base, args);
   grpc_connector_unref(&c->base);
+  grpc_channel_args_destroy(final_args);
   return s;
 }
 
@@ -157,6 +162,7 @@ grpc_channel *grpc_channel_create(const char *target,
   gpr_ref_init(&f->refs, 1);
   grpc_mdctx_ref(mdctx);
   f->mdctx = mdctx;
+  f->merge_args = grpc_channel_args_copy(args);
   resolver = grpc_resolver_create(target, &f->base);
   if (!resolver) {
     return NULL;

src/core/surface/secure_channel_create.c

@@ -81,14 +81,18 @@ static void on_secure_transport_setup_done(void *arg,
   if (status != GRPC_SECURITY_OK) {
     gpr_log(GPR_ERROR, "Secure transport setup failed with error %d.", status);
     memset(c->result, 0, sizeof(*c->result));
-    notify = c->notify;
-    c->notify = NULL;
-    grpc_iomgr_add_callback(notify);
   } else {
     c->result->transport = grpc_create_chttp2_transport(
         c->args.channel_args, secure_endpoint,
         NULL, 0, c->args.metadata_context, 1);
+    c->result->filters = gpr_malloc(sizeof(grpc_channel_filter *) * 2);
+    c->result->filters[0] = &grpc_client_auth_filter;
+    c->result->filters[1] = &grpc_http_client_filter;
+    c->result->num_filters = 2;
   }
+  notify = c->notify;
+  c->notify = NULL;
+  grpc_iomgr_add_callback(notify);
 }
 
 static void connected(void *arg, grpc_endpoint *tcp) {
@@ -123,6 +127,7 @@ typedef struct {
   grpc_subchannel_factory base;
   gpr_refcount refs;
   grpc_mdctx *mdctx;
+  grpc_channel_args *merge_args;
   grpc_channel_security_connector *security_connector;
 } subchannel_factory;
 
@@ -142,14 +147,18 @@ static void subchannel_factory_unref(grpc_subchannel_factory *scf) {
 static grpc_subchannel *subchannel_factory_create_subchannel(grpc_subchannel_factory *scf, grpc_subchannel_args *args) {
   subchannel_factory *f = (subchannel_factory *)scf;
   connector *c = gpr_malloc(sizeof(*c));
+  grpc_channel_args *final_args =
+      grpc_channel_args_merge(args->args, f->merge_args);
   grpc_subchannel *s;
   memset(c, 0, sizeof(*c));
   c->base.vtable = &connector_vtable;
   c->security_connector = f->security_connector;
   gpr_ref_init(&c->refs, 1);
   args->mdctx = f->mdctx;
+  args->args = final_args;
   s = grpc_subchannel_create(&c->base, args);
   grpc_connector_unref(&c->base);
+  grpc_channel_args_destroy(final_args);
   return s;
 }
 
@@ -334,7 +343,7 @@ grpc_channel *grpc_secure_channel_create(grpc_credentials *creds,
   connector_arg = grpc_security_connector_to_arg(&connector->base);
   args_copy = grpc_channel_args_copy_and_add(
       new_args_from_connector != NULL ? new_args_from_connector : args,
-      &connector_arg);
+      &connector_arg, 1);
   /* TODO(census)
   if (grpc_channel_args_is_census_enabled(args)) {
     filters[n++] = &grpc_client_census_filter;
@@ -347,6 +356,7 @@ grpc_channel *grpc_secure_channel_create(grpc_credentials *creds,
   gpr_ref_init(&f->refs, 1);
   f->mdctx = mdctx;
   f->security_connector = connector;
+  f->merge_args = grpc_channel_args_copy(args_copy);
   resolver = grpc_resolver_create(target, &f->base);
   if (!resolver) {
     return NULL;

test/core/end2end/fixtures/chttp2_simple_ssl_fullstack.c

@@ -105,7 +105,7 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
                                 GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
                                 {"foo.test.google.fr"}};
   grpc_channel_args *new_client_args =
-      grpc_channel_args_copy_and_add(client_args, &ssl_name_override);
+      grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
   grpc_channel_args_destroy(new_client_args);
 }

test/core/end2end/fixtures/chttp2_simple_ssl_fullstack_with_poll.c

@@ -105,7 +105,7 @@ static void chttp2_init_client_simple_ssl_secure_fullstack(
                                 GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
                                 {"foo.test.google.fr"}};
   grpc_channel_args *new_client_args =
-      grpc_channel_args_copy_and_add(client_args, &ssl_name_override);
+      grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_creds);
   grpc_channel_args_destroy(new_client_args);
 }

test/core/end2end/fixtures/chttp2_simple_ssl_with_oauth2_fullstack.c

@@ -108,7 +108,7 @@ static void chttp2_init_client_simple_ssl_with_oauth2_secure_fullstack(
                                 GRPC_SSL_TARGET_NAME_OVERRIDE_ARG,
                                 {"foo.test.google.fr"}};
   grpc_channel_args *new_client_args =
-      grpc_channel_args_copy_and_add(client_args, &ssl_name_override);
+      grpc_channel_args_copy_and_add(client_args, &ssl_name_override, 1);
   chttp2_init_client_secure_fullstack(f, new_client_args, ssl_oauth2_creds);
   grpc_channel_args_destroy(new_client_args);
   grpc_credentials_release(ssl_creds);