Split ifaddr related functions out into a separate file

22 files changed, 423 insertions, 176 deletions

diff --git a/BUILD b/BUILD
index ca0a1c5607..dc6431484e 100644
--- a/BUILD
+++ b/BUILD
@@ -481,6 +481,8 @@ grpc_cc_library(
         "src/core/lib/iomgr/tcp_client_windows.c",
         "src/core/lib/iomgr/tcp_posix.c",
         "src/core/lib/iomgr/tcp_server_posix.c",
+        "src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c",
+        "src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c",
         "src/core/lib/iomgr/tcp_server_uv.c",
         "src/core/lib/iomgr/tcp_server_windows.c",
         "src/core/lib/iomgr/tcp_uv.c",
@@ -599,6 +601,7 @@ grpc_cc_library(
         "src/core/lib/iomgr/tcp_client_posix.h",
         "src/core/lib/iomgr/tcp_posix.h",
         "src/core/lib/iomgr/tcp_server.h",
+        "src/core/lib/iomgr/tcp_server_utils_posix.h",
         "src/core/lib/iomgr/tcp_uv.h",
         "src/core/lib/iomgr/tcp_windows.h",
         "src/core/lib/iomgr/time_averaged_stats.h",
diff --git a/CMakeLists.txt b/CMakeLists.txt
index d0a65b4493..cfc4555834 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -914,6 +914,8 @@ add_library(grpc
   src/core/lib/iomgr/tcp_client_windows.c
   src/core/lib/iomgr/tcp_posix.c
   src/core/lib/iomgr/tcp_server_posix.c
+  src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
+  src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
   src/core/lib/iomgr/tcp_server_uv.c
   src/core/lib/iomgr/tcp_server_windows.c
   src/core/lib/iomgr/tcp_uv.c
@@ -1223,6 +1225,8 @@ add_library(grpc_cronet
   src/core/lib/iomgr/tcp_client_windows.c
   src/core/lib/iomgr/tcp_posix.c
   src/core/lib/iomgr/tcp_server_posix.c
+  src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
+  src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
   src/core/lib/iomgr/tcp_server_uv.c
   src/core/lib/iomgr/tcp_server_windows.c
   src/core/lib/iomgr/tcp_uv.c
@@ -1523,6 +1527,8 @@ add_library(grpc_test_util
   src/core/lib/iomgr/tcp_client_windows.c
   src/core/lib/iomgr/tcp_posix.c
   src/core/lib/iomgr/tcp_server_posix.c
+  src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
+  src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
   src/core/lib/iomgr/tcp_server_uv.c
   src/core/lib/iomgr/tcp_server_windows.c
   src/core/lib/iomgr/tcp_uv.c
@@ -1769,6 +1775,8 @@ add_library(grpc_unsecure
   src/core/lib/iomgr/tcp_client_windows.c
   src/core/lib/iomgr/tcp_posix.c
   src/core/lib/iomgr/tcp_server_posix.c
+  src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
+  src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
   src/core/lib/iomgr/tcp_server_uv.c
   src/core/lib/iomgr/tcp_server_windows.c
   src/core/lib/iomgr/tcp_uv.c
@@ -2376,6 +2384,8 @@ add_library(grpc++_cronet
   src/core/lib/iomgr/tcp_client_windows.c
   src/core/lib/iomgr/tcp_posix.c
   src/core/lib/iomgr/tcp_server_posix.c
+  src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
+  src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
   src/core/lib/iomgr/tcp_server_uv.c
   src/core/lib/iomgr/tcp_server_windows.c
   src/core/lib/iomgr/tcp_uv.c
diff --git a/Makefile b/Makefile
index a9242dddbd..14c5a36c95 100644
--- a/Makefile
+++ b/Makefile
@@ -2799,6 +2799,8 @@ LIBGRPC_SRC = \
     src/core/lib/iomgr/tcp_client_windows.c \
     src/core/lib/iomgr/tcp_posix.c \
     src/core/lib/iomgr/tcp_server_posix.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c \
     src/core/lib/iomgr/tcp_server_uv.c \
     src/core/lib/iomgr/tcp_server_windows.c \
     src/core/lib/iomgr/tcp_uv.c \
@@ -3111,6 +3113,8 @@ LIBGRPC_CRONET_SRC = \
     src/core/lib/iomgr/tcp_client_windows.c \
     src/core/lib/iomgr/tcp_posix.c \
     src/core/lib/iomgr/tcp_server_posix.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c \
     src/core/lib/iomgr/tcp_server_uv.c \
     src/core/lib/iomgr/tcp_server_windows.c \
     src/core/lib/iomgr/tcp_uv.c \
@@ -3414,6 +3418,8 @@ LIBGRPC_TEST_UTIL_SRC = \
     src/core/lib/iomgr/tcp_client_windows.c \
     src/core/lib/iomgr/tcp_posix.c \
     src/core/lib/iomgr/tcp_server_posix.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c \
     src/core/lib/iomgr/tcp_server_uv.c \
     src/core/lib/iomgr/tcp_server_windows.c \
     src/core/lib/iomgr/tcp_uv.c \
@@ -3640,6 +3646,8 @@ LIBGRPC_UNSECURE_SRC = \
     src/core/lib/iomgr/tcp_client_windows.c \
     src/core/lib/iomgr/tcp_posix.c \
     src/core/lib/iomgr/tcp_server_posix.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c \
     src/core/lib/iomgr/tcp_server_uv.c \
     src/core/lib/iomgr/tcp_server_windows.c \
     src/core/lib/iomgr/tcp_uv.c \
@@ -4249,6 +4257,8 @@ LIBGRPC++_CRONET_SRC = \
     src/core/lib/iomgr/tcp_client_windows.c \
     src/core/lib/iomgr/tcp_posix.c \
     src/core/lib/iomgr/tcp_server_posix.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c \
     src/core/lib/iomgr/tcp_server_uv.c \
     src/core/lib/iomgr/tcp_server_windows.c \
     src/core/lib/iomgr/tcp_uv.c \
diff --git a/binding.gyp b/binding.gyp
index c521a27c30..ec21a97806 100644
--- a/binding.gyp
+++ b/binding.gyp
@@ -667,6 +667,8 @@
         'src/core/lib/iomgr/tcp_client_windows.c',
         'src/core/lib/iomgr/tcp_posix.c',
         'src/core/lib/iomgr/tcp_server_posix.c',
+        'src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c',
+        'src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c',
         'src/core/lib/iomgr/tcp_server_uv.c',
         'src/core/lib/iomgr/tcp_server_windows.c',
         'src/core/lib/iomgr/tcp_uv.c',
diff --git a/build.yaml b/build.yaml
index a32a8a06d3..36817a5506 100644
--- a/build.yaml
+++ b/build.yaml
@@ -228,6 +228,7 @@ filegroups:
   - src/core/lib/iomgr/tcp_client_posix.h
   - src/core/lib/iomgr/tcp_posix.h
   - src/core/lib/iomgr/tcp_server.h
+  - src/core/lib/iomgr/tcp_server_utils_posix.h
   - src/core/lib/iomgr/tcp_uv.h
   - src/core/lib/iomgr/tcp_windows.h
   - src/core/lib/iomgr/time_averaged_stats.h
@@ -337,6 +338,8 @@ filegroups:
   - src/core/lib/iomgr/tcp_client_windows.c
   - src/core/lib/iomgr/tcp_posix.c
   - src/core/lib/iomgr/tcp_server_posix.c
+  - src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
+  - src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
   - src/core/lib/iomgr/tcp_server_uv.c
   - src/core/lib/iomgr/tcp_server_windows.c
   - src/core/lib/iomgr/tcp_uv.c
diff --git a/config.m4 b/config.m4
index 90536e503e..181e44c52c 100644
--- a/config.m4
+++ b/config.m4
@@ -140,6 +140,8 @@ if test "$PHP_GRPC" != "no"; then
     src/core/lib/iomgr/tcp_client_windows.c \
     src/core/lib/iomgr/tcp_posix.c \
     src/core/lib/iomgr/tcp_server_posix.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c \
+    src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c \
     src/core/lib/iomgr/tcp_server_uv.c \
     src/core/lib/iomgr/tcp_server_windows.c \
     src/core/lib/iomgr/tcp_uv.c \
diff --git a/gRPC-Core.podspec b/gRPC-Core.podspec
index 027babcda4..1d002247d4 100644
--- a/gRPC-Core.podspec
+++ b/gRPC-Core.podspec
@@ -309,6 +309,7 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/tcp_client_posix.h',
                       'src/core/lib/iomgr/tcp_posix.h',
                       'src/core/lib/iomgr/tcp_server.h',
+                      'src/core/lib/iomgr/tcp_server_utils_posix.h',
                       'src/core/lib/iomgr/tcp_uv.h',
                       'src/core/lib/iomgr/tcp_windows.h',
                       'src/core/lib/iomgr/time_averaged_stats.h',
@@ -508,6 +509,8 @@ Pod::Spec.new do |s|
                       'src/core/lib/iomgr/tcp_client_windows.c',
                       'src/core/lib/iomgr/tcp_posix.c',
                       'src/core/lib/iomgr/tcp_server_posix.c',
+                      'src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c',
+                      'src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c',
                       'src/core/lib/iomgr/tcp_server_uv.c',
                       'src/core/lib/iomgr/tcp_server_windows.c',
                       'src/core/lib/iomgr/tcp_uv.c',
@@ -744,6 +747,7 @@ Pod::Spec.new do |s|
                               'src/core/lib/iomgr/tcp_client_posix.h',
                               'src/core/lib/iomgr/tcp_posix.h',
                               'src/core/lib/iomgr/tcp_server.h',
+                              'src/core/lib/iomgr/tcp_server_utils_posix.h',
                               'src/core/lib/iomgr/tcp_uv.h',
                               'src/core/lib/iomgr/tcp_windows.h',
                               'src/core/lib/iomgr/time_averaged_stats.h',
diff --git a/grpc.gemspec b/grpc.gemspec
index 8d5b7b2ab1..edc08cb9b9 100755
--- a/grpc.gemspec
+++ b/grpc.gemspec
@@ -226,6 +226,7 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/tcp_client_posix.h )
   s.files += %w( src/core/lib/iomgr/tcp_posix.h )
   s.files += %w( src/core/lib/iomgr/tcp_server.h )
+  s.files += %w( src/core/lib/iomgr/tcp_server_utils_posix.h )
   s.files += %w( src/core/lib/iomgr/tcp_uv.h )
   s.files += %w( src/core/lib/iomgr/tcp_windows.h )
   s.files += %w( src/core/lib/iomgr/time_averaged_stats.h )
@@ -425,6 +426,8 @@ Gem::Specification.new do |s|
   s.files += %w( src/core/lib/iomgr/tcp_client_windows.c )
   s.files += %w( src/core/lib/iomgr/tcp_posix.c )
   s.files += %w( src/core/lib/iomgr/tcp_server_posix.c )
+  s.files += %w( src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c )
+  s.files += %w( src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c )
   s.files += %w( src/core/lib/iomgr/tcp_server_uv.c )
   s.files += %w( src/core/lib/iomgr/tcp_server_windows.c )
   s.files += %w( src/core/lib/iomgr/tcp_uv.c )
diff --git a/package.xml b/package.xml
index 4167bef26e..21eeee4d3e 100644
--- a/package.xml
+++ b/package.xml
@@ -235,6 +235,7 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_client_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_server.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_server_utils_posix.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_uv.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_windows.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/time_averaged_stats.h" role="src" />
@@ -434,6 +435,8 @@
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_client_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_posix.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_server_posix.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_server_uv.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_server_windows.c" role="src" />
     <file baseinstalldir="/" name="src/core/lib/iomgr/tcp_uv.c" role="src" />
diff --git a/src/core/lib/iomgr/tcp_server_posix.c b/src/core/lib/iomgr/tcp_server_posix.c
index 61ffb02a71..1e9e854d6b 100644
--- a/src/core/lib/iomgr/tcp_server_posix.c
+++ b/src/core/lib/iomgr/tcp_server_posix.c
@@ -42,10 +42,6 @@
 
 #include "src/core/lib/iomgr/tcp_server.h"
 
-#ifdef GRPC_HAVE_IFADDRS
-#include <ifaddrs.h>
-#endif /* GRPC_HAVE_IFADDRS */
-
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
@@ -70,6 +66,7 @@
 #include "src/core/lib/iomgr/sockaddr_utils.h"
 #include "src/core/lib/iomgr/socket_utils_posix.h"
 #include "src/core/lib/iomgr/tcp_posix.h"
+#include "src/core/lib/iomgr/tcp_server_utils_posix.h"
 #include "src/core/lib/iomgr/unix_sockets_posix.h"
 #include "src/core/lib/support/string.h"
 
@@ -78,29 +75,6 @@
 static gpr_once s_init_max_accept_queue_size;
 static int s_max_accept_queue_size;
 
-/* one listening port */
-typedef struct grpc_tcp_listener grpc_tcp_listener;
-struct grpc_tcp_listener {
-  int fd;
-  grpc_fd *emfd;
-  grpc_tcp_server *server;
-  grpc_resolved_address addr;
-  int port;
-  unsigned port_index;
-  unsigned fd_index;
-  grpc_closure read_closure;
-  grpc_closure destroyed_closure;
-  struct grpc_tcp_listener *next;
-  /* sibling is a linked list of all listeners for a given port. add_port and
-     clone_port place all new listeners in the same sibling list. A member of
-     the 'sibling' list is also a member of the 'next' list. The head of each
-     sibling list has is_sibling==0, and subsequent members of sibling lists
-     have is_sibling==1. is_sibling allows separate sibling lists to be
-     identified while iterating through 'next'. */
-  struct grpc_tcp_listener *sibling;
-  int is_sibling;
-};
-
 /* the overall server */
 struct grpc_tcp_server {
   gpr_refcount refs;
@@ -526,11 +500,11 @@ static grpc_error *add_socket_to_server(grpc_tcp_server *s, int fd,
 
 /* If successful, add a listener to s for addr, set *dsmode for the socket, and
    return the *listener. */
-static grpc_error *add_addr_to_server(grpc_tcp_server *s,
-                                      const grpc_resolved_address *addr,
-                                      unsigned port_index, unsigned fd_index,
-                                      grpc_dualstack_mode *dsmode,
-                                      grpc_tcp_listener **listener) {
+grpc_error *grpc_tcp_server_add_addr(grpc_tcp_server *s,
+                                     const grpc_resolved_address *addr,
+                                     unsigned port_index, unsigned fd_index,
+                                     grpc_dualstack_mode *dsmode,
+                                     grpc_tcp_listener **listener) {
   grpc_resolved_address addr4_copy;
   int fd;
   grpc_error *err =
@@ -545,39 +519,9 @@ static grpc_error *add_addr_to_server(grpc_tcp_server *s,
   return add_socket_to_server(s, fd, addr, port_index, fd_index, listener);
 }
 
-/* Bind to "::" to get a port number not used by any address. */
-static grpc_error *get_unused_port(int *port) {
-  grpc_resolved_address wild;
-  grpc_sockaddr_make_wildcard6(0, &wild);
-  grpc_dualstack_mode dsmode;
-  int fd;
-  grpc_error *err =
-      grpc_create_dualstack_socket(&wild, SOCK_STREAM, 0, &dsmode, &fd);
-  if (err != GRPC_ERROR_NONE) {
-    return err;
-  }
-  if (dsmode == GRPC_DSMODE_IPV4) {
-    grpc_sockaddr_make_wildcard4(0, &wild);
-  }
-  if (bind(fd, (const struct sockaddr *)wild.addr, (socklen_t)wild.len) != 0) {
-    err = GRPC_OS_ERROR(errno, "bind");
-    close(fd);
-    return err;
-  }
-  if (getsockname(fd, (struct sockaddr *)wild.addr, (socklen_t *)&wild.len) !=
-      0) {
-    err = GRPC_OS_ERROR(errno, "getsockname");
-    close(fd);
-    return err;
-  }
-  close(fd);
-  *port = grpc_sockaddr_get_port(&wild);
-  return *port <= 0 ? GRPC_ERROR_CREATE("Bad port") : GRPC_ERROR_NONE;
-}
-
 /* Return the listener in s with address addr or NULL. */
-static grpc_tcp_listener *find_listener_with_addr(grpc_tcp_server *s,
-                                                  grpc_resolved_address *addr) {
+grpc_tcp_listener *grpc_tcp_server_find_listener_with_addr(
+    grpc_tcp_server *s, grpc_resolved_address *addr) {
   grpc_tcp_listener *l;
   gpr_mu_lock(&s->mu);
   for (l = s->head; l != NULL; l = l->next) {
@@ -592,108 +536,6 @@ static grpc_tcp_listener *find_listener_with_addr(grpc_tcp_server *s,
   return l;
 }
 
-/* Get all addresses assigned to network interfaces on the machine and create a
-   listener for each. requested_port is the port to use for every listener, or 0
-   to select one random port that will be used for every listener. Set *out_port
-   to the port selected. Return GRPC_ERROR_NONE only if all listeners were
-   added. */
-static grpc_error *add_all_local_addrs_to_server(grpc_tcp_server *s,
-                                                 unsigned port_index,
-                                                 int requested_port,
-                                                 int *out_port) {
-#ifndef GRPC_HAVE_IFADDRS
-  return GRPC_ERROR_CREATE("no ifaddrs available");
-#else  /* ifndef GRPC_HAVE_IFADDRS */
-  struct ifaddrs *ifa = NULL;
-  struct ifaddrs *ifa_it;
-  unsigned fd_index = 0;
-  grpc_tcp_listener *sp = NULL;
-  grpc_error *err = GRPC_ERROR_NONE;
-  if (requested_port == 0) {
-    /* Note: There could be a race where some local addrs can listen on the
-       selected port and some can't. The sane way to handle this would be to
-       retry by recreating the whole grpc_tcp_server. Backing out individual
-       listeners and orphaning the FDs looks like too much trouble. */
-    if ((err = get_unused_port(&requested_port)) != GRPC_ERROR_NONE) {
-      return err;
-    } else if (requested_port <= 0) {
-      return GRPC_ERROR_CREATE("Bad get_unused_port()");
-    }
-    gpr_log(GPR_DEBUG, "Picked unused port %d", requested_port);
-  }
-  if (getifaddrs(&ifa) != 0 || ifa == NULL) {
-    return GRPC_OS_ERROR(errno, "getifaddrs");
-  }
-  for (ifa_it = ifa; ifa_it != NULL; ifa_it = ifa_it->ifa_next) {
-    grpc_resolved_address addr;
-    char *addr_str = NULL;
-    grpc_dualstack_mode dsmode;
-    grpc_tcp_listener *new_sp = NULL;
-    const char *ifa_name = (ifa_it->ifa_name ? ifa_it->ifa_name : "<unknown>");
-    if (ifa_it->ifa_addr == NULL) {
-      continue;
-    } else if (ifa_it->ifa_addr->sa_family == AF_INET) {
-      addr.len = sizeof(struct sockaddr_in);
-    } else if (ifa_it->ifa_addr->sa_family == AF_INET6) {
-      addr.len = sizeof(struct sockaddr_in6);
-    } else {
-      continue;
-    }
-    memcpy(addr.addr, ifa_it->ifa_addr, addr.len);
-    if (!grpc_sockaddr_set_port(&addr, requested_port)) {
-      /* Should never happen, because we check sa_family above. */
-      err = GRPC_ERROR_CREATE("Failed to set port");
-      break;
-    }
-    if (grpc_sockaddr_to_string(&addr_str, &addr, 0) < 0) {
-      addr_str = gpr_strdup("<error>");
-    }
-    gpr_log(GPR_DEBUG,
-            "Adding local addr from interface %s flags 0x%x to server: %s",
-            ifa_name, ifa_it->ifa_flags, addr_str);
-    /* We could have multiple interfaces with the same address (e.g., bonding),
-       so look for duplicates. */
-    if (find_listener_with_addr(s, &addr) != NULL) {
-      gpr_log(GPR_DEBUG, "Skipping duplicate addr %s on interface %s", addr_str,
-              ifa_name);
-      gpr_free(addr_str);
-      continue;
-    }
-    if ((err = add_addr_to_server(s, &addr, port_index, fd_index, &dsmode,
-                                  &new_sp)) != GRPC_ERROR_NONE) {
-      char *err_str = NULL;
-      grpc_error *root_err;
-      if (gpr_asprintf(&err_str, "Failed to add listener: %s", addr_str) < 0) {
-        err_str = gpr_strdup("Failed to add listener");
-      }
-      root_err = GRPC_ERROR_CREATE(err_str);
-      gpr_free(err_str);
-      gpr_free(addr_str);
-      err = grpc_error_add_child(root_err, err);
-      break;
-    } else {
-      GPR_ASSERT(requested_port == new_sp->port);
-      ++fd_index;
-      if (sp != NULL) {
-        new_sp->is_sibling = 1;
-        sp->sibling = new_sp;
-      }
-      sp = new_sp;
-    }
-    gpr_free(addr_str);
-  }
-  freeifaddrs(ifa);
-  if (err != GRPC_ERROR_NONE) {
-    return err;
-  } else if (sp == NULL) {
-    return GRPC_ERROR_CREATE("No local addresses");
-  } else {
-    *out_port = sp->port;
-    return GRPC_ERROR_NONE;
-  }
-#endif /* ifndef GRPC_HAVE_IFADDRS */
-}
-
 /* Treat :: or 0.0.0.0 as a family-agnostic wildcard. */
 static grpc_error *add_wildcard_addrs_to_server(grpc_tcp_server *s,
                                                 unsigned port_index,
@@ -709,17 +551,15 @@ static grpc_error *add_wildcard_addrs_to_server(grpc_tcp_server *s,
   grpc_error *v4_err = GRPC_ERROR_NONE;
   *out_port = -1;
 
-#ifdef GRPC_HAVE_IFADDRS
-  if (s->expand_wildcard_addrs) {
-    return add_all_local_addrs_to_server(s, port_index, requested_port,
-                                         out_port);
+  if (grpc_tcp_server_have_ifaddrs() && s->expand_wildcard_addrs) {
+    return grpc_tcp_server_add_all_local_addrs(s, port_index, requested_port,
+                                               out_port);
   }
-#endif /* GRPC_HAVE_IFADDRS */
 
   grpc_sockaddr_make_wildcards(requested_port, &wild4, &wild6);
   /* Try listening on IPv6 first. */
-  if ((v6_err = add_addr_to_server(s, &wild6, port_index, fd_index, &dsmode,
-                                   &sp)) == GRPC_ERROR_NONE) {
+  if ((v6_err = grpc_tcp_server_add_addr(s, &wild6, port_index, fd_index,
+                                         &dsmode, &sp)) == GRPC_ERROR_NONE) {
     ++fd_index;
     requested_port = *out_port = sp->port;
     if (dsmode == GRPC_DSMODE_DUALSTACK || dsmode == GRPC_DSMODE_IPV4) {
@@ -728,8 +568,8 @@ static grpc_error *add_wildcard_addrs_to_server(grpc_tcp_server *s,
   }
   /* If we got a v6-only socket or nothing, try adding 0.0.0.0. */
   grpc_sockaddr_set_port(&wild4, requested_port);
-  if ((v4_err = add_addr_to_server(s, &wild4, port_index, fd_index, &dsmode,
-                                   &sp2)) == GRPC_ERROR_NONE) {
+  if ((v4_err = grpc_tcp_server_add_addr(s, &wild4, port_index, fd_index,
+                                         &dsmode, &sp2)) == GRPC_ERROR_NONE) {
     *out_port = sp2->port;
     if (sp != NULL) {
       sp2->is_sibling = 1;
@@ -839,7 +679,7 @@ grpc_error *grpc_tcp_server_add_port(grpc_tcp_server *s,
   if (grpc_sockaddr_to_v4mapped(addr, &addr6_v4mapped)) {
     addr = &addr6_v4mapped;
   }
-  if ((err = add_addr_to_server(s, addr, port_index, 0, &dsmode, &sp)) ==
+  if ((err = grpc_tcp_server_add_addr(s, addr, port_index, 0, &dsmode, &sp)) ==
       GRPC_ERROR_NONE) {
     *out_port = sp->port;
   }
diff --git a/src/core/lib/iomgr/tcp_server_utils_posix.h b/src/core/lib/iomgr/tcp_server_utils_posix.h
new file mode 100644
index 0000000000..d39f9085fd
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_server_utils_posix.h
@@ -0,0 +1,89 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#ifndef GRPC_CORE_LIB_IOMGR_TCP_SERVER_UTILS_POSIX_H
+#define GRPC_CORE_LIB_IOMGR_TCP_SERVER_UTILS_POSIX_H
+
+#include "src/core/lib/iomgr/ev_posix.h"
+#include "src/core/lib/iomgr/resolve_address.h"
+#include "src/core/lib/iomgr/socket_utils_posix.h"
+#include "src/core/lib/iomgr/tcp_server.h"
+
+/* one listening port */
+typedef struct grpc_tcp_listener {
+  int fd;
+  grpc_fd *emfd;
+  grpc_tcp_server *server;
+  grpc_resolved_address addr;
+  int port;
+  unsigned port_index;
+  unsigned fd_index;
+  grpc_closure read_closure;
+  grpc_closure destroyed_closure;
+  struct grpc_tcp_listener *next;
+  /* sibling is a linked list of all listeners for a given port. add_port and
+     clone_port place all new listeners in the same sibling list. A member of
+     the 'sibling' list is also a member of the 'next' list. The head of each
+     sibling list has is_sibling==0, and subsequent members of sibling lists
+     have is_sibling==1. is_sibling allows separate sibling lists to be
+     identified while iterating through 'next'. */
+  struct grpc_tcp_listener *sibling;
+  int is_sibling;
+} grpc_tcp_listener;
+
+/* If successful, add a listener to \a s for \a addr, set \a dsmode for the
+   socket, and return the \a listener. */
+grpc_error *grpc_tcp_server_add_addr(grpc_tcp_server *s,
+                                     const grpc_resolved_address *addr,
+                                     unsigned port_index, unsigned fd_index,
+                                     grpc_dualstack_mode *dsmode,
+                                     grpc_tcp_listener **listener);
+
+/* Return the listener in \a s with address \a addr or NULL. */
+grpc_tcp_listener *grpc_tcp_server_find_listener_with_addr(
+    grpc_tcp_server *s, grpc_resolved_address *addr);
+
+/* Get all addresses assigned to network interfaces on the machine and create a
+   listener for each. requested_port is the port to use for every listener, or 0
+   to select one random port that will be used for every listener. Set *out_port
+   to the port selected. Return GRPC_ERROR_NONE only if all listeners were
+   added. */
+grpc_error *grpc_tcp_server_add_all_local_addrs(grpc_tcp_server *s,
+                                                unsigned port_index,
+                                                int requested_port,
+                                                int *out_port);
+
+/* Ruturn true if the platform supports ifaddrs */
+bool grpc_tcp_server_have_ifaddrs(void);
+
+#endif /* GRPC_CORE_LIB_IOMGR_TCP_SERVER_UTILS_POSIX_H */
diff --git a/src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c b/src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
new file mode 100644
index 0000000000..05eb96f73e
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c
@@ -0,0 +1,178 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/port.h"
+
+#ifdef GRPC_HAVE_IFADDRS
+
+#include "src/core/lib/iomgr/tcp_server_utils_posix.h"
+
+#include <errno.h>
+#include <ifaddrs.h>
+#include <stddef.h>
+#include <string.h>
+
+#include <grpc/support/alloc.h>
+#include <grpc/support/log.h>
+#include <grpc/support/string_util.h>
+
+#include "src/core/lib/iomgr/error.h"
+#include "src/core/lib/iomgr/sockaddr.h"
+#include "src/core/lib/iomgr/sockaddr_utils.h"
+
+/* Bind to "::" to get a port number not used by any address. */
+static grpc_error *get_unused_port(int *port) {
+  grpc_resolved_address wild;
+  grpc_sockaddr_make_wildcard6(0, &wild);
+  grpc_dualstack_mode dsmode;
+  int fd;
+  grpc_error *err =
+      grpc_create_dualstack_socket(&wild, SOCK_STREAM, 0, &dsmode, &fd);
+  if (err != GRPC_ERROR_NONE) {
+    return err;
+  }
+  if (dsmode == GRPC_DSMODE_IPV4) {
+    grpc_sockaddr_make_wildcard4(0, &wild);
+  }
+  if (bind(fd, (const struct sockaddr *)wild.addr, (socklen_t)wild.len) != 0) {
+    err = GRPC_OS_ERROR(errno, "bind");
+    close(fd);
+    return err;
+  }
+  if (getsockname(fd, (struct sockaddr *)wild.addr, (socklen_t *)&wild.len) !=
+      0) {
+    err = GRPC_OS_ERROR(errno, "getsockname");
+    close(fd);
+    return err;
+  }
+  close(fd);
+  *port = grpc_sockaddr_get_port(&wild);
+  return *port <= 0 ? GRPC_ERROR_CREATE("Bad port") : GRPC_ERROR_NONE;
+}
+
+grpc_error *grpc_tcp_server_add_all_local_addrs(grpc_tcp_server *s,
+                                                unsigned port_index,
+                                                int requested_port,
+                                                int *out_port) {
+  struct ifaddrs *ifa = NULL;
+  struct ifaddrs *ifa_it;
+  unsigned fd_index = 0;
+  grpc_tcp_listener *sp = NULL;
+  grpc_error *err = GRPC_ERROR_NONE;
+  if (requested_port == 0) {
+    /* Note: There could be a race where some local addrs can listen on the
+       selected port and some can't. The sane way to handle this would be to
+       retry by recreating the whole grpc_tcp_server. Backing out individual
+       listeners and orphaning the FDs looks like too much trouble. */
+    if ((err = get_unused_port(&requested_port)) != GRPC_ERROR_NONE) {
+      return err;
+    } else if (requested_port <= 0) {
+      return GRPC_ERROR_CREATE("Bad get_unused_port()");
+    }
+    gpr_log(GPR_DEBUG, "Picked unused port %d", requested_port);
+  }
+  if (getifaddrs(&ifa) != 0 || ifa == NULL) {
+    return GRPC_OS_ERROR(errno, "getifaddrs");
+  }
+  for (ifa_it = ifa; ifa_it != NULL; ifa_it = ifa_it->ifa_next) {
+    grpc_resolved_address addr;
+    char *addr_str = NULL;
+    grpc_dualstack_mode dsmode;
+    grpc_tcp_listener *new_sp = NULL;
+    const char *ifa_name = (ifa_it->ifa_name ? ifa_it->ifa_name : "<unknown>");
+    if (ifa_it->ifa_addr == NULL) {
+      continue;
+    } else if (ifa_it->ifa_addr->sa_family == AF_INET) {
+      addr.len = sizeof(struct sockaddr_in);
+    } else if (ifa_it->ifa_addr->sa_family == AF_INET6) {
+      addr.len = sizeof(struct sockaddr_in6);
+    } else {
+      continue;
+    }
+    memcpy(addr.addr, ifa_it->ifa_addr, addr.len);
+    if (!grpc_sockaddr_set_port(&addr, requested_port)) {
+      /* Should never happen, because we check sa_family above. */
+      err = GRPC_ERROR_CREATE("Failed to set port");
+      break;
+    }
+    if (grpc_sockaddr_to_string(&addr_str, &addr, 0) < 0) {
+      addr_str = gpr_strdup("<error>");
+    }
+    gpr_log(GPR_DEBUG,
+            "Adding local addr from interface %s flags 0x%x to server: %s",
+            ifa_name, ifa_it->ifa_flags, addr_str);
+    /* We could have multiple interfaces with the same address (e.g., bonding),
+       so look for duplicates. */
+    if (grpc_tcp_server_find_listener_with_addr(s, &addr) != NULL) {
+      gpr_log(GPR_DEBUG, "Skipping duplicate addr %s on interface %s", addr_str,
+              ifa_name);
+      gpr_free(addr_str);
+      continue;
+    }
+    if ((err = grpc_tcp_server_add_addr(s, &addr, port_index, fd_index, &dsmode,
+                                        &new_sp)) != GRPC_ERROR_NONE) {
+      char *err_str = NULL;
+      grpc_error *root_err;
+      if (gpr_asprintf(&err_str, "Failed to add listener: %s", addr_str) < 0) {
+        err_str = gpr_strdup("Failed to add listener");
+      }
+      root_err = GRPC_ERROR_CREATE(err_str);
+      gpr_free(err_str);
+      gpr_free(addr_str);
+      err = grpc_error_add_child(root_err, err);
+      break;
+    } else {
+      GPR_ASSERT(requested_port == new_sp->port);
+      ++fd_index;
+      if (sp != NULL) {
+        new_sp->is_sibling = 1;
+        sp->sibling = new_sp;
+      }
+      sp = new_sp;
+    }
+    gpr_free(addr_str);
+  }
+  freeifaddrs(ifa);
+  if (err != GRPC_ERROR_NONE) {
+    return err;
+  } else if (sp == NULL) {
+    return GRPC_ERROR_CREATE("No local addresses");
+  } else {
+    *out_port = sp->port;
+    return GRPC_ERROR_NONE;
+  }
+}
+
+bool grpc_tcp_server_have_ifaddrs(void) { return true; }
+
+#endif /* GRPC_HAVE_IFADDRS */
diff --git a/src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c b/src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
new file mode 100644
index 0000000000..fb21d62d05
--- /dev/null
+++ b/src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c
@@ -0,0 +1,49 @@
+/*
+ *
+ * Copyright 2017, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ */
+
+#include "src/core/lib/iomgr/port.h"
+
+#ifndef GRPC_HAVE_IFADDRS
+
+#include "src/core/lib/iomgr/tcp_server_utils_posix.h"
+
+grpc_error *grpc_tcp_server_add_all_local_addrs(grpc_tcp_server *s,
+                                                unsigned port_index,
+                                                int requested_port,
+                                                int *out_port) {
+  return GRPC_ERROR_CREATE("no ifaddrs available");
+}
+
+bool grpc_tcp_server_have_ifaddrs(void) { return false; }
+
+#endif /* ifndef GRPC_HAVE_IFADDRS */
diff --git a/src/python/grpcio/grpc_core_dependencies.py b/src/python/grpcio/grpc_core_dependencies.py
index a9f20e6d2a..00b2b8f902 100644
--- a/src/python/grpcio/grpc_core_dependencies.py
+++ b/src/python/grpcio/grpc_core_dependencies.py
@@ -134,6 +134,8 @@ CORE_SOURCE_FILES = [
   'src/core/lib/iomgr/tcp_client_windows.c',
   'src/core/lib/iomgr/tcp_posix.c',
   'src/core/lib/iomgr/tcp_server_posix.c',
+  'src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c',
+  'src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c',
   'src/core/lib/iomgr/tcp_server_uv.c',
   'src/core/lib/iomgr/tcp_server_windows.c',
   'src/core/lib/iomgr/tcp_uv.c',
diff --git a/tools/doxygen/Doxyfile.core.internal b/tools/doxygen/Doxyfile.core.internal
index 131a013451..f9e4775b73 100644
--- a/tools/doxygen/Doxyfile.core.internal
+++ b/tools/doxygen/Doxyfile.core.internal
@@ -1130,6 +1130,9 @@ src/core/lib/iomgr/tcp_posix.c \
 src/core/lib/iomgr/tcp_posix.h \
 src/core/lib/iomgr/tcp_server.h \
 src/core/lib/iomgr/tcp_server_posix.c \
+src/core/lib/iomgr/tcp_server_utils_posix.h \
+src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c \
+src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c \
 src/core/lib/iomgr/tcp_server_uv.c \
 src/core/lib/iomgr/tcp_server_windows.c \
 src/core/lib/iomgr/tcp_uv.c \
diff --git a/tools/run_tests/generated/sources_and_headers.json b/tools/run_tests/generated/sources_and_headers.json
index 767c2b2e36..38fe87ac46 100644
--- a/tools/run_tests/generated/sources_and_headers.json
+++ b/tools/run_tests/generated/sources_and_headers.json
@@ -7456,6 +7456,7 @@
       "src/core/lib/iomgr/tcp_client_posix.h", 
       "src/core/lib/iomgr/tcp_posix.h", 
       "src/core/lib/iomgr/tcp_server.h", 
+      "src/core/lib/iomgr/tcp_server_utils_posix.h", 
       "src/core/lib/iomgr/tcp_uv.h", 
       "src/core/lib/iomgr/tcp_windows.h", 
       "src/core/lib/iomgr/time_averaged_stats.h", 
@@ -7636,6 +7637,9 @@
       "src/core/lib/iomgr/tcp_posix.h", 
       "src/core/lib/iomgr/tcp_server.h", 
       "src/core/lib/iomgr/tcp_server_posix.c", 
+      "src/core/lib/iomgr/tcp_server_utils_posix.h", 
+      "src/core/lib/iomgr/tcp_server_utils_posix_ifaddrs.c", 
+      "src/core/lib/iomgr/tcp_server_utils_posix_noifaddrs.c", 
       "src/core/lib/iomgr/tcp_server_uv.c", 
       "src/core/lib/iomgr/tcp_server_windows.c", 
       "src/core/lib/iomgr/tcp_uv.c", 
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj b/vsprojects/vcxproj/grpc/grpc.vcxproj
index fde60be3e2..7b48dfbf59 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj
@@ -357,6 +357,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_client_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_uv.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\time_averaged_stats.h" />
@@ -618,6 +619,10 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_ifaddrs.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_noifaddrs.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_uv.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_windows.c">
diff --git a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
index 8edbbc22be..8ba8a4f8fb 100644
--- a/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc/grpc.vcxproj.filters
@@ -181,6 +181,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_ifaddrs.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_noifaddrs.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_uv.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -944,6 +950,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_uv.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
index e7c9fb71f3..d078db1c3c 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj
@@ -252,6 +252,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_client_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_uv.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\time_averaged_stats.h" />
@@ -461,6 +462,10 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_ifaddrs.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_noifaddrs.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_uv.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_windows.c">
diff --git a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
index 3d36948aae..9e2d817143 100644
--- a/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_test_util/grpc_test_util.vcxproj.filters
@@ -238,6 +238,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_ifaddrs.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_noifaddrs.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_uv.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -728,6 +734,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_uv.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
index 22f4740b8f..b6f10b3d7c 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj
@@ -347,6 +347,7 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_client_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server.h" />
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_uv.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_windows.h" />
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\time_averaged_stats.h" />
@@ -585,6 +586,10 @@
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_posix.c">
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_ifaddrs.c">
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_noifaddrs.c">
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_uv.c">
     </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_windows.c">
diff --git a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
index 5021cb47d8..03662d4044 100644
--- a/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
+++ b/vsprojects/vcxproj/grpc_unsecure/grpc_unsecure.vcxproj.filters
@@ -184,6 +184,12 @@
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_posix.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_ifaddrs.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
+    <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix_noifaddrs.c">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClCompile>
     <ClCompile Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_uv.c">
       <Filter>src\core\lib\iomgr</Filter>
     </ClCompile>
@@ -854,6 +860,9 @@
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>
+    <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_server_utils_posix.h">
+      <Filter>src\core\lib\iomgr</Filter>
+    </ClInclude>
     <ClInclude Include="$(SolutionDir)\..\src\core\lib\iomgr\tcp_uv.h">
       <Filter>src\core\lib\iomgr</Filter>
     </ClInclude>