diff --git a/examples/unix/sock-server.py b/examples/unix/sock-server.py
index ed14b7f31e..f08aede3c1 100644
--- a/examples/unix/sock-server.py
+++ b/examples/unix/sock-server.py
@@ -16,6 +16,7 @@ ai = socket.getaddrinfo("127.0.0.1", 8080)
 print("Bind address info:", ai)
 addr = ai[0][4]
 
+s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
 s.bind(addr)
 s.listen(5)
 print("Listening, connect your browser to http://127.0.0.1:8080/")
diff --git a/py/obj.h b/py/obj.h
index b33e3c5981..9c6a354220 100644
--- a/py/obj.h
+++ b/py/obj.h
@@ -40,6 +40,7 @@ typedef struct _mp_obj_base_t mp_obj_base_t;
 #define MP_OBJ_IS_QSTR(o) ((((mp_small_int_t)(o)) & 3) == 2)
 #define MP_OBJ_IS_OBJ(o) ((((mp_small_int_t)(o)) & 3) == 0)
 #define MP_OBJ_IS_TYPE(o, t) (MP_OBJ_IS_OBJ(o) && (((mp_obj_base_t*)(o))->type == (t))) // this does not work for checking a string, use below macro for that
+#define MP_OBJ_IS_INT(o) (MP_OBJ_IS_SMALL_INT(o) || MP_OBJ_IS_TYPE(o, &int_type))
 #define MP_OBJ_IS_STR(o) (MP_OBJ_IS_QSTR(o) || MP_OBJ_IS_TYPE(o, &str_type))
 
 #define MP_OBJ_SMALL_INT_VALUE(o) (((mp_small_int_t)(o)) >> 1)
diff --git a/py/objfun.c b/py/objfun.c
index 1f6ad68ea4..fe4f49430e 100644
--- a/py/objfun.c
+++ b/py/objfun.c
@@ -63,7 +63,7 @@ mp_obj_t fun_native_call(mp_obj_t self_in, uint n_args, uint n_kw, const mp_obj_
 
         return res;
 
-    } else if (self->n_args_min == self->n_args_max) {
+    } else if (self->n_args_min <= 3 && self->n_args_min == self->n_args_max) {
         // function requires a fixed number of arguments
 
         // dispatch function call
diff --git a/unix/socket.c b/unix/socket.c
index 36b848468c..d4d7b29b52 100644
--- a/unix/socket.c
+++ b/unix/socket.c
@@ -162,6 +162,29 @@ static mp_obj_t socket_send(uint n_args, const mp_obj_t *args) {
 }
 static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_send_obj, 2, 3, socket_send);
 
+static mp_obj_t socket_setsockopt(uint n_args, const mp_obj_t *args) {
+    mp_obj_socket_t *self = args[0];
+    int level = MP_OBJ_SMALL_INT_VALUE(args[1]);
+    int option = mp_obj_get_int(args[2]);
+
+    const void *optval;
+    socklen_t optlen;
+    if (MP_OBJ_IS_INT(args[3])) {
+        int val = mp_obj_int_get(args[3]);
+        optval = &val;
+        optlen = sizeof(val);
+    } else {
+        buffer_info_t bufinfo;
+        get_buffer(args[3], &bufinfo);
+        optval = bufinfo.buf;
+        optlen = bufinfo.len;
+    }
+    int r = setsockopt(self->fd, level, option, optval, optlen);
+    RAISE_ERRNO(r, errno);
+    return mp_const_none;
+}
+static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(socket_setsockopt_obj, 4, 4, socket_setsockopt);
+
 static mp_obj_t socket_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
     int family = AF_INET;
     int type = SOCK_STREAM;
@@ -196,6 +219,7 @@ static const mp_method_t rawsocket_type_methods[] = {
         { "accept", &socket_accept_obj },
         { "recv", &socket_recv_obj },
         { "send", &socket_send_obj },
+        { "setsockopt", &socket_setsockopt_obj },
         { "close", &socket_close_obj },
 #if MICROPY_SOCKET_EXTRA
         { "recv", &mp_stream_read_obj },
@@ -299,7 +323,33 @@ static MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_socket_getaddrinfo_obj, 2, 6, mod
 
 extern mp_obj_type_t sockaddr_in_type;
 
-#define STORE_INT_CONST(m, name) rt_store_attr(m, QSTR_FROM_STR_STATIC(#name), MP_OBJ_NEW_SMALL_INT(name))
+#define C(name) { #name, name }
+
+struct sym_entry {
+    const char *sym;
+    int val;
+} constants[] = {
+    C(AF_UNIX),
+    C(AF_INET),
+    C(AF_INET6),
+    C(SOCK_STREAM),
+    C(SOCK_DGRAM),
+    C(SOCK_RAW),
+
+    C(MSG_DONTROUTE),
+    C(MSG_DONTWAIT),
+
+    C(SOL_SOCKET),
+    C(SO_BROADCAST),
+    C(SO_ERROR),
+    C(SO_KEEPALIVE),
+    C(SO_LINGER),
+    C(SO_REUSEADDR),
+
+    {NULL}
+};
+
+#undef C
 
 void rawsocket_init() {
     mp_obj_t m = mp_obj_new_module(MP_QSTR_rawsocket);
@@ -311,10 +361,7 @@ void rawsocket_init() {
     rt_store_attr(m, MP_QSTR_gethostbyname, (mp_obj_t)&mod_socket_gethostbyname_obj);
 #endif
     rt_store_attr(m, MP_QSTR_getaddrinfo, (mp_obj_t)&mod_socket_getaddrinfo_obj);
-    STORE_INT_CONST(m, AF_UNIX);
-    STORE_INT_CONST(m, AF_INET);
-    STORE_INT_CONST(m, AF_INET6);
-    STORE_INT_CONST(m, SOCK_STREAM);
-    STORE_INT_CONST(m, SOCK_DGRAM);
-    STORE_INT_CONST(m, SOCK_RAW);
+    for (struct sym_entry *p = constants; p->sym != NULL; p++) {
+        rt_store_attr(m, QSTR_FROM_STR_STATIC(p->sym), MP_OBJ_NEW_SMALL_INT(p->val));
+    }
 }