4 files changed, 111 insertions, 0 deletions
diff --git a/src/core/lib/iomgr/grpc_if_nametoindex.h b/src/core/lib/iomgr/grpc_if_nametoindex.h
new file mode 100644
index 0000000000..ed9612dcb9
--- /dev/null
+++ b/src/core/lib/iomgr/grpc_if_nametoindex.h
@@ -0,0 +1,30 @@
+/*
+ *
+ * Copyright 2015 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_GRPC_IF_NAMETOINDEX_H
+#define GRPC_CORE_LIB_IOMGR_GRPC_IF_NAMETOINDEX_H
+
+#include <grpc/support/port_platform.h>
+
+#include <stddef.h>
+
+/* Returns the interface index corresponding to the interface "name" provided.
+ * Returns non-zero upon success, and zero upon failure. */
+uint32_t grpc_if_nametoindex(char* name);
+
+#endif /* GRPC_CORE_LIB_IOMGR_GRPC_IF_NAMETOINDEX_H */
diff --git a/src/core/lib/iomgr/grpc_if_nametoindex_posix.cc b/src/core/lib/iomgr/grpc_if_nametoindex_posix.cc
new file mode 100644
index 0000000000..f1ba20dcec
--- /dev/null
+++ b/src/core/lib/iomgr/grpc_if_nametoindex_posix.cc
@@ -0,0 +1,42 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/port.h"
+
+#if GRPC_IF_NAMETOINDEX == 1 && defined(GRPC_POSIX_SOCKET_IF_NAMETOINDEX)
+
+#include "src/core/lib/iomgr/grpc_if_nametoindex.h"
+
+#include <errno.h>
+#include <net/if.h>
+
+#include <grpc/support/log.h>
+
+uint32_t grpc_if_nametoindex(char* name) {
+  uint32_t out = if_nametoindex(name);
+  if (out == 0) {
+    gpr_log(GPR_DEBUG, "if_nametoindex failed for name %s. errno %d", name,
+            errno);
+  }
+  return out;
+}
+
+#endif /* GRPC_IF_NAMETOINDEX == 1 && \
+          defined(GRPC_POSIX_SOCKET_IF_NAMETOINDEX) */
diff --git a/src/core/lib/iomgr/grpc_if_nametoindex_unsupported.cc b/src/core/lib/iomgr/grpc_if_nametoindex_unsupported.cc
new file mode 100644
index 0000000000..08644cccf3
--- /dev/null
+++ b/src/core/lib/iomgr/grpc_if_nametoindex_unsupported.cc
@@ -0,0 +1,38 @@
+/*
+ *
+ * Copyright 2016 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/core/lib/iomgr/port.h"
+
+#if GRPC_IF_NAMETOINDEX == 0 || !defined(GRPC_POSIX_SOCKET_IF_NAMETOINDEX)
+
+#include "src/core/lib/iomgr/grpc_if_nametoindex.h"
+
+#include <grpc/support/log.h>
+
+uint32_t grpc_if_nametoindex(char* name) {
+  gpr_log(GPR_DEBUG,
+          "Not attempting to convert interface name %s to index for current "
+          "platform.",
+          name);
+  return 0;
+}
+
+#endif /* GRPC_IF_NAMETOINDEX == 0 || \
+          !defined(GRPC_POSIX_SOCKET_IF_NAMETOINDEX) */
diff --git a/src/core/lib/iomgr/port.h b/src/core/lib/iomgr/port.h
index c8046b21dc..7b6ca1bc0e 100644
--- a/src/core/lib/iomgr/port.h
+++ b/src/core/lib/iomgr/port.h
@@ -184,6 +184,7 @@
 #define GRPC_POSIX_SOCKET_EV_EPOLLEX 1
 #define GRPC_POSIX_SOCKET_EV_POLL 1
 #define GRPC_POSIX_SOCKET_EV_EPOLL1 1
+#define GRPC_POSIX_SOCKET_IF_NAMETOINDEX 1
 #define GRPC_POSIX_SOCKET_IOMGR 1
 #define GRPC_POSIX_SOCKET_RESOLVE_ADDRESS 1
 #define GRPC_POSIX_SOCKET_SOCKADDR 1