Extend IRT with nacl_irt_resource_open interface

src/untrusted/irt/irt_manifest.c

Index: src/untrusted/irt/irt_manifest.c
===================================================================
--- src/untrusted/irt/irt_manifest.c	(revision 0)
+++ src/untrusted/irt/irt_manifest.c	(revision 0)
@@ -0,0 +1,79 @@
+#include <string.h>
+#include <stdio.h>
+#include <sys/nacl_syscalls.h>
+#include <nacl/nacl_srpc.h>
+#include <sys/nacl_name_service.h>
+#include <sys/fcntl.h>
+#include "native_client/src/untrusted/irt/irt.h"
+
+static void print_error(const char *message) {
+  write(2, message, strlen(message));
+}
+
+int irt_open_file_in_manifest (const char* file) {
+  int ns;
+  int connected_socket;
+  struct NaClSrpcChannel ns_channel;
+  int status;
+  int desc;
+  int manifest;
+  int manifest_conn;
+  struct NaClSrpcChannel manifest_channel;
+  print_error("irt here\n");
+  ns = -1;
+  nacl_nameservice(&ns);
+  printf("irt ns = %d\n", ns);
+  if (-1 == ns) {
+    print_error("Can't connect to name service\n");
+    return -1;
+  }
+  connected_socket = imc_connect(ns);
+  if (-1 == connected_socket) {
+    print_error("Can't connect to name service\n");
+    return -1;
+  }
+  close(ns);
+  if (!NaClSrpcClientCtor(&ns_channel, connected_socket)) {
+    print_error("Srpc client channel ctor failed\n");
+    return -1;
+  }
+  if (NACL_SRPC_RESULT_OK != NaClSrpcInvokeBySignature(
+      &ns_channel, NACL_NAME_SERVICE_LOOKUP, "ManifestNameService", O_RDWR,
+      &status, &manifest)) {
+    print_error("Nameservice lookup failed, status\n");
+    NaClSrpcDtor(&ns_channel);
+    return -1;
+  }
+  if (-1 == manifest) {
+    print_error("Manifest descriptor is invalid\n");
+    NaClSrpcDtor(&ns_channel);
+    return -1;
+  }
+  manifest_conn = imc_connect(manifest);
+  if (-1 == manifest_conn) {
+    print_error("Can't connect to manifest service\n");
+    NaClSrpcDtor(&ns_channel);
+    return -1;
+  }
+  close(manifest);
+  if (!NaClSrpcClientCtor(&manifest_channel, manifest_conn)) {
+    print_error("Can't create manifest srpc channel\n");
+    NaClSrpcDtor(&ns_channel);
+    return -1;
+  }
+  desc = 0;
+  if (NACL_SRPC_RESULT_OK != NaClSrpcInvokeBySignature(
+      &manifest_channel, NACL_NAME_SERVICE_LOOKUP, file, O_RDONLY,
+      &status, &desc)) {
+    print_error("Manifest lookup RPC failed\n");
+    NaClSrpcDtor(&manifest_channel);
+    return -1;
+  }
+  NaClSrpcDtor(&manifest_channel);

[bsy, 2011/08/11 02:32:43]

the irt should be able to cache these channels for its own use.  there's no
sense in doing the setup / tear down over and over on a per-file basis.

[halyavin, 2011/08/12 08:52:07]

Done.

+  NaClSrpcDtor(&ns_channel);
+  return desc;
+}
+
+const struct nacl_irt_manifest_open nacl_irt_manifest_open = {
+  irt_open_file_in_manifest
+};