diff --git a/libc/include/bits/epoll_event.h b/libc/include/bits/epoll_event.h
new file mode 100644
index 0000000..054323c
--- /dev/null
+++ b/libc/include/bits/epoll_event.h
@@ -0,0 +1,51 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * 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.
+ *
+ * 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 _BITS_EPOLL_EVENT_H_
+#define _BITS_EPOLL_EVENT_H_
+
+#include <sys/cdefs.h>
+#include <stdint.h>
+
+typedef union epoll_data {
+  void* ptr;
+  int fd;
+  uint32_t u32;
+  uint64_t u64;
+} epoll_data_t;
+
+struct epoll_event {
+  uint32_t events;
+  epoll_data_t data;
+}
+#ifdef __x86_64__
+__packed
+#endif
+;
+
+#endif
diff --git a/libc/include/bits/in_addr.h b/libc/include/bits/in_addr.h
new file mode 100644
index 0000000..834c056
--- /dev/null
+++ b/libc/include/bits/in_addr.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * 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.
+ *
+ * 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 _BITS_IN_ADDR_H_
+#define _BITS_IN_ADDR_H_
+
+#include <sys/cdefs.h>
+#include <stdint.h>
+
+typedef uint32_t in_addr_t;
+
+struct in_addr {
+  in_addr_t s_addr;
+};
+
+#endif
diff --git a/libc/include/bits/ip_mreq_source.h b/libc/include/bits/ip_mreq_source.h
new file mode 100644
index 0000000..0eb8d68
--- /dev/null
+++ b/libc/include/bits/ip_mreq_source.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * 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.
+ *
+ * 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 _BITS_IP_MREQ_SOURCE_H_
+#define _BITS_IP_MREQ_SOURCE_H_
+
+#include <sys/cdefs.h>
+#include <bits/in_addr.h>
+
+struct ip_mreq_source {
+  struct in_addr imr_multiaddr;
+  struct in_addr imr_interface;
+  struct in_addr imr_sourceaddr;
+};
+
+#endif
diff --git a/libc/include/bits/ip_msfilter.h b/libc/include/bits/ip_msfilter.h
new file mode 100644
index 0000000..23c127d
--- /dev/null
+++ b/libc/include/bits/ip_msfilter.h
@@ -0,0 +1,43 @@
+/*
+ * Copyright (C) 2017 The Android Open Source Project
+ * 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.
+ *
+ * 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 _BITS_IP_MSFILTER_H_
+#define _BITS_IP_MSFILTER_H_
+
+#include <sys/cdefs.h>
+#include <bits/in_addr.h>
+
+struct ip_msfilter {
+  struct in_addr imsf_multiaddr;
+  struct in_addr imsf_interface;
+  uint32_t imsf_fmode;
+  uint32_t imsf_numsrc;
+  struct in_addr imsf_slist[1];
+};
+
+#endif
diff --git a/libc/include/netinet/in.h b/libc/include/netinet/in.h
index 0ca8c82..1c9961c 100644
--- a/libc/include/netinet/in.h
+++ b/libc/include/netinet/in.h
@@ -43,7 +43,6 @@
 #define INET_ADDRSTRLEN 16
 
 typedef uint16_t in_port_t;
-typedef uint32_t in_addr_t;
 
 int bindresvport(int __fd, struct sockaddr_in* __sin);
 
@@ -57,4 +56,4 @@
 
 __END_DECLS
 
-#endif /* _NETINET_IN_H_ */
+#endif
diff --git a/libc/include/sys/epoll.h b/libc/include/sys/epoll.h
index 6ecd93f..2bc16f5 100644
--- a/libc/include/sys/epoll.h
+++ b/libc/include/sys/epoll.h
@@ -37,22 +37,6 @@
 
 __BEGIN_DECLS
 
-typedef union epoll_data {
-  void* ptr;
-  int fd;
-  uint32_t u32;
-  uint64_t u64;
-} epoll_data_t;
-
-struct epoll_event {
-  uint32_t events;
-  epoll_data_t data;
-}
-#ifdef __x86_64__
-__packed
-#endif
-;
-
 int epoll_create(int __size);
 int epoll_create1(int __flags) __INTRODUCED_IN(21);
 
diff --git a/libc/include/sys/socket.h b/libc/include/sys/socket.h
index ed851a2..152f39d 100644
--- a/libc/include/sys/socket.h
+++ b/libc/include/sys/socket.h
@@ -44,8 +44,6 @@
 
 __BEGIN_DECLS
 
-#define sockaddr_storage __kernel_sockaddr_storage
-
 struct timespec;
 
 #ifdef __mips__