diff --git a/CMakeLists.txt b/CMakeLists.txt
index fa90f3b33..cd174955a 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -165,12 +165,12 @@ if(UNIX)
         set(LIBTUNTAP_IMPL ${TT_ROOT}/tuntap-unix-openbsd.c ${TT_ROOT}/tuntap-unix-bsd.c)
     elseif (${CMAKE_SYSTEM_NAME} MATCHES "NetBSD")
         set(LIBTUNTAP_IMPL ${TT_ROOT}/tuntap-unix-netbsd.c ${TT_ROOT}/tuntap-unix-bsd.c)
-    elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD")
-        set(LIBTUNTAP_IMPL ${TT_ROOT}/tuntap-unix-freebsd.c ${TT_ROOT}/tuntap-unix-bsd.c)
-    elseif (${CMAKE_SYSTEM_NAME} MATCHES "DragonFly")
+    elseif (${CMAKE_SYSTEM_NAME} MATCHES "FreeBSD" OR ${CMAKE_SYSTEM_NAME} MATCHES "DragonFly")
         set(LIBTUNTAP_IMPL ${TT_ROOT}/tuntap-unix-freebsd.c ${TT_ROOT}/tuntap-unix-bsd.c)
     elseif (${CMAKE_SYSTEM_NAME} MATCHES "Darwin")
         set(LIBTUNTAP_IMPL ${TT_ROOT}/tuntap-unix-darwin.c ${TT_ROOT}/tuntap-unix-bsd.c)
+    elseif (${CMAKE_SYSTEM_NAME} MATCHES "SunOS")
+        set(LIBTUNTAP_IMPL ${TT_ROOT}/tuntap-unix-sunos.c)
     else()
         message(FATAL_ERROR "Your operating system is not supported yet")
     endif()
diff --git a/include/llarp/endian.h b/include/llarp/endian.h
index 5a195f4e5..6405dd97b 100644
--- a/include/llarp/endian.h
+++ b/include/llarp/endian.h
@@ -8,6 +8,26 @@
 
 #if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__)
 #include <sys/endian.h>
+#elif defined(__sun)
+#include <sys/byteorder.h>
+#define htobe16(x) htons(x)
+#define htole16(x) (x)
+#define be16toh(x) ntohs(x)
+#define le16toh(x) (x)
+
+#define htobe32(x) htonl(x)
+#define htole32(x) (x)
+#define be32toh(x) ntohl(x)
+#define le32toh(x) (x)
+
+#define htobe64(x)                                        \
+  (((uint64_t)htonl(((uint32_t)(((uint64_t)(x)) >> 32)))) \
+   | (((uint64_t)htonl(((uint32_t)(x)))) << 32))
+#define htole64(x) (x)
+#define be64toh(x)                                        \
+  (((uint64_t)ntohl(((uint32_t)(((uint64_t)(x)) >> 32)))) \
+   | (((uint64_t)ntohl(((uint32_t)(x)))) << 32))
+#define le64toh(x) (x)
 #elif defined(__linux__) || defined(__FreeBSD_kernel__) || defined(__GLIBC__)
 #include <endian.h>
 #elif defined(__APPLE__) && defined(__MACH__)
diff --git a/include/llarp/ip.hpp b/include/llarp/ip.hpp
index 8fc46fe5c..02861f901 100644
--- a/include/llarp/ip.hpp
+++ b/include/llarp/ip.hpp
@@ -2,8 +2,15 @@
 #define LLARP_IP_HPP
 #include <llarp/buffer.h>
 #include <llarp/time.h>
+#include <netinet/in.h>
 #include <netinet/ip.h>
 #include <memory>
+#ifdef __sun
+// slightly different type names on sunos
+#define iphdr ip
+#define saddr ip_src.s_addr
+#define daddr ip_dst.s_addr
+#endif
 
 namespace llarp
 {
diff --git a/include/llarp/iwp/server.hpp b/include/llarp/iwp/server.hpp
index ce349761e..853cc4ee9 100644
--- a/include/llarp/iwp/server.hpp
+++ b/include/llarp/iwp/server.hpp
@@ -5,6 +5,12 @@
 #include "router.hpp"
 #include "session.hpp"
 
+#ifdef __sun
+#ifdef saddr
+#undef saddr
+#endif
+#endif
+
 #include <algorithm>
 #include <fstream>
 
diff --git a/include/tuntap.h b/include/tuntap.h
index cb42d20c7..005eedada 100644
--- a/include/tuntap.h
+++ b/include/tuntap.h
@@ -56,7 +56,7 @@
  */
 #if defined ETH_ALEN /* Linux */
 #define ETHER_ADDR_LEN ETH_ALEN
-#elif defined Windows
+#elif defined Windows || defined __sun__
 #define ETHER_ADDR_LEN 6
 #endif
 
@@ -86,7 +86,7 @@
  */
 #if defined Windows
 #include <in6addr.h>
-#include <winsock.h>
+#include <winsock2.h>
 typedef HANDLE t_tun;
 typedef IN_ADDR t_tun_in_addr;
 typedef IN6_ADDR t_tun_in6_addr;
diff --git a/llarp/context.cpp b/llarp/context.cpp
index b797b86f5..e3185bca4 100644
--- a/llarp/context.cpp
+++ b/llarp/context.cpp
@@ -20,7 +20,7 @@ extern "C" void
 SetThreadName(DWORD dwThreadID, LPCSTR szThreadName);
 #endif
 
-#ifdef _WIN32
+#if _WIN32 || __sun
 #define wmin(x, y) (((x) < (y)) ? (x) : (y))
 #define MIN wmin
 #endif
diff --git a/llarp/ev.cpp b/llarp/ev.cpp
index f0e2ca5ca..67d4ec255 100644
--- a/llarp/ev.cpp
+++ b/llarp/ev.cpp
@@ -5,7 +5,7 @@
 #define EV_TICK_INTERVAL 100
 
 // apparently current Solaris will emulate epoll.
-#if __linux__ || __SunOS_5_11
+#if __linux__ || __sun__
 #include "ev_epoll.hpp"
 #endif
 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
@@ -19,7 +19,7 @@
 void
 llarp_ev_loop_alloc(struct llarp_ev_loop **ev)
 {
-#if __linux__ || __SunOS_5_11
+#if __linux__ || __sun__
   *ev = new llarp_epoll_loop;
 #endif
 #if defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__NetBSD__) \
@@ -111,4 +111,4 @@ bool
 llarp_ev_tun_async_write(struct llarp_tun_io *tun, const void *pkt, size_t sz)
 {
   return static_cast< llarp::ev_io * >(tun->impl)->queue_write(pkt, sz);
-}
\ No newline at end of file
+}
diff --git a/llarp/ev.hpp b/llarp/ev.hpp
index 6237a1246..1099706a0 100644
--- a/llarp/ev.hpp
+++ b/llarp/ev.hpp
@@ -54,6 +54,14 @@ namespace llarp
       m_writeq.Process([this](const std::unique_ptr< WriteBuffer >& buffer) {
         write(fd, buffer->buf, buffer->bufsz);
       });
+        // todo: wtf???
+#ifndef _WIN32
+#else
+#if 0
+        DWORD bytes_written = 0;
+        if(::WriteFile((HANDLE)fd, buffer->payload.data(), buffer->payload.size(), &bytes_written, nullptr))
+#endif
+#endif
       /// reset errno
       errno = 0;
     }
diff --git a/llarp/ev_win32.hpp b/llarp/ev_win32.hpp
index c949c073d..4c62f1c78 100644
--- a/llarp/ev_win32.hpp
+++ b/llarp/ev_win32.hpp
@@ -21,13 +21,7 @@ namespace llarp
     WSAOVERLAPPED portfds[2] = {0};
     size_t iosz;
 
-    // the unique completion key that helps us to
-    // identify the object instance for which we receive data
-    // Here, we'll use the address of the udp_listener instance, converted to
-    // its literal int/int64 representation.
-    ULONG_PTR listener_id = 0;
-
-    udp_listener(SOCKET fd, llarp_udp_io* u) : ev_io(fd), udp(u){};
+	udp_listener(SOCKET fd, llarp_udp_io* u) : ev_io(fd), udp(u){};
 
     ~udp_listener()
     {
diff --git a/llarp/fs.hpp b/llarp/fs.hpp
index ad6d06dd3..9b0e71889 100644
--- a/llarp/fs.hpp
+++ b/llarp/fs.hpp
@@ -12,7 +12,7 @@
 // win32 is the only one that doesn't use cpp17::filesystem
 // because cpp17::filesystem is unimplemented for Windows
 // -despair86
-#if defined(__MINGW32__) || defined(_MSC_VER)
+#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__sun)
 namespace fs = std::experimental::filesystem;
 #else
 namespace fs = std::filesystem;
diff --git a/vendor/cppbackport-master/lib/filesystem.h b/vendor/cppbackport-master/lib/filesystem.h
index 9d925f2a0..94cdddb5b 100644
--- a/vendor/cppbackport-master/lib/filesystem.h
+++ b/vendor/cppbackport-master/lib/filesystem.h
@@ -39,7 +39,7 @@
 #include "version.h"
 
 #if defined(CPP17) && defined(USE_CXX17_FILESYSTEM)
-#if defined(__MINGW32__) || defined(_MSC_VER)
+#if defined(__MINGW32__) || defined(_MSC_VER) || defined(__sun)
 // win32 needs experimental
 #include <experimental/filesystem>
 #else