|  | @@ -32,7 +32,14 @@
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				|  |  |   */
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				|  |  |  
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				|  |  |  #include <grpc/grpc.h>
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				|  |  | +#include <grpc/grpc_security.h>
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				|  |  | +#include <grpc/support/alloc.h>
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				|  |  | +#include <grpc/support/host_port.h>
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				|  |  |  #include <grpc/support/log.h>
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				|  |  | +#include <grpc/support/time.h>
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				|  |  | +#include "src/core/security/credentials.h"
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				|  |  | +#include "src/core/tsi/fake_transport_security.h"
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				|  |  | +#include "test/core/util/port.h"
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				|  |  |  #include "test/core/util/test_config.h"
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				|  |  |  
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				|  |  |  void test_unparsable_target(void) {
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				|  | @@ -40,10 +47,31 @@ void test_unparsable_target(void) {
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				|  |  |    GPR_ASSERT(port == 0);
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				|  |  |  }
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				|  |  |  
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				|  |  | +void test_add_same_port_twice() {
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				|  |  | +  int port = grpc_pick_unused_port_or_die();
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				|  |  | +  char *addr = NULL;
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				|  |  | +  grpc_completion_queue *cq = grpc_completion_queue_create(NULL);
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				|  |  | +  grpc_server *server = grpc_server_create(NULL, NULL);
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				|  |  | +  grpc_server_credentials *fake_creds =
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				|  |  | +      grpc_fake_transport_security_server_credentials_create();
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				|  |  | +  gpr_join_host_port(&addr, "localhost", port);
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				|  |  | +  GPR_ASSERT(grpc_server_add_secure_http2_port(server, addr, fake_creds));
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				|  |  | +  GPR_ASSERT(grpc_server_add_secure_http2_port(server, addr, fake_creds) == 0);
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				|  |  | +
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				|  |  | +  grpc_server_credentials_release(fake_creds);
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				|  |  | +  gpr_free(addr);
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				|  |  | +  grpc_server_shutdown_and_notify(server, cq, NULL);
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				|  |  | +  grpc_completion_queue_pluck(cq, NULL, gpr_inf_future(GPR_CLOCK_REALTIME),
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				|  |  | +                              NULL);
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				|  |  | +  grpc_server_destroy(server);
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				|  |  | +  grpc_completion_queue_destroy(cq);
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				|  |  | +}
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				|  |  | +
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				|  |  |  int main(int argc, char **argv) {
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				|  |  |    grpc_test_init(argc, argv);
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				|  |  |    grpc_init();
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				|  |  |    test_unparsable_target();
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				|  |  | +  test_add_same_port_twice();
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				|  |  |    grpc_shutdown();
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				|  |  |    return 0;
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				|  |  |  }
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