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#![allow(dead_code)]
extern crate libc;
extern crate zmq_ffi;
#[macro_use]
extern crate cfg_if;
mod socket;
mod errno;
pub use socket::Socket;
pub use errno::*;
use std::ops::{ Deref, DerefMut };
use std::ffi;
use std::vec::Vec;
use std::slice;
use std::mem::transmute;
use libc::{ c_int, c_void, size_t };
pub const ZMQ_VERSION_MAJOR:i32 = 4;
pub const ZMQ_VERSION_MINOR:i32 = 1;
pub const ZMQ_VERSION_PATCH:i32 = 4;
macro_rules! ret_when_null {
($ptr: expr) => {{
if $ptr.is_null() {
return Err(Error::from_last_err());
}
}}
}
#[macro_export]
macro_rules! ZMQ_MAKE_VERSION {
($major: expr, $minor: expr, $patch: expr) => {
{
$major * 10000 + $minor * 100 + $patch
}
}
}
pub const ZMQ_VERSION:i32 = ZMQ_MAKE_VERSION!(
ZMQ_VERSION_MAJOR,
ZMQ_VERSION_MINOR,
ZMQ_VERSION_PATCH
);
fn errno() -> c_int {
unsafe {
zmq_ffi::zmq_errno()
}
}
fn strerror(errnum: c_int) -> String {
unsafe {
let s = zmq_ffi::zmq_strerror(errnum);
ffi::CStr::from_ptr(s).to_str().unwrap().to_string()
}
}
pub fn version() -> (i32, i32, i32) {
let mut major = 0;
let mut minor = 0;
let mut patch = 0;
unsafe {
zmq_ffi::zmq_version(&mut major, &mut minor, &mut patch);
}
(major as i32, minor as i32, patch as i32)
}
#[derive(Clone)]
pub struct Error {
err_num: c_int,
err_str: String,
}
impl Error {
fn from_last_err() -> Error {
let err_num = errno();
let err_str = strerror(err_num);
Error {
err_num: err_num,
err_str: err_str,
}
}
pub fn get_errno(&self) -> Errno {
self.err_num as Errno
}
}
impl std::fmt::Display for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
write!(f, "{} (code {})", self.err_str, self.err_num)
}
}
impl std::fmt::Debug for Error {
fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
std::fmt::Display::fmt(self, f)
}
}
impl std::error::Error for Error {
fn description(&self) -> &str {
&self.err_str
}
}
type ContextOption = c_int;
const IO_THREADS: ContextOption = 1;
const MAX_SOCKETS: ContextOption = 2;
const SOCKET_LIMIT: ContextOption = 3;
const THREAD_PRIORITY: ContextOption = 3;
const THREAD_SCHED_POLICY: ContextOption = 4;
const IPV6: ContextOption = 42;
macro_rules! getctxopt_template {
($name: ident, $opt: expr) => {
pub fn $name(&self) -> Result<i32, Error> {
let rc = unsafe { zmq_ffi::zmq_ctx_get(self.ctx_ptr, $opt as c_int) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(rc)
}
}
};
($name: ident, $opt: expr, $map: expr, $rt: ty) => {
pub fn $name(&self) -> Result<$rt, Error> {
let rc = unsafe { zmq_ffi::zmq_ctx_get(self.ctx_ptr, $opt as c_int) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok($map(rc))
}
}
};
}
macro_rules! setctxopt_template {
($name: ident, $opt: expr) => {
pub fn $name(&mut self, optval: i32) -> Result<(), Error> {
let rc = unsafe { zmq_ffi::zmq_ctx_set(self.ctx_ptr, $opt as c_int, optval as c_int) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(())
}
}
};
}
pub struct Context {
ctx_ptr: *mut c_void,
}
impl Context {
pub fn new() -> Result<Context, Error> {
let ctx_ptr = unsafe { zmq_ffi::zmq_ctx_new() };
ret_when_null!(ctx_ptr);
Ok(Context {
ctx_ptr: ctx_ptr,
})
}
fn term(&mut self) -> Result<(), Error> {
let rc = unsafe { zmq_ffi::zmq_ctx_term(self.ctx_ptr) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(())
}
}
pub fn shutdown(&mut self) -> Result<(), Error> {
let rc = unsafe { zmq_ffi::zmq_ctx_shutdown(self.ctx_ptr) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(())
}
}
getctxopt_template!(get_io_threads, IO_THREADS);
getctxopt_template!(get_max_sockets, MAX_SOCKETS);
getctxopt_template!(get_socket_limit, SOCKET_LIMIT);
getctxopt_template!(is_ipv6_enabled, IPV6, |r| { r > 0 }, bool);
setctxopt_template!(set_io_threads, IO_THREADS);
setctxopt_template!(set_max_sockets, MAX_SOCKETS);
setctxopt_template!(set_thread_priority, THREAD_PRIORITY);
setctxopt_template!(set_thread_sched_policy, THREAD_SCHED_POLICY);
setctxopt_template!(set_ipv6, IPV6);
pub fn socket(&self, t: SocketType) -> Result<Socket, Error> {
let socket = unsafe { zmq_ffi::zmq_socket(self.ctx_ptr, t as c_int) };
ret_when_null!(socket);
Ok(Socket::from_raw(socket))
}
}
unsafe impl Send for Context {}
unsafe impl Sync for Context {}
impl Drop for Context {
fn drop(&mut self) {
loop {
match self.term() {
Ok(_) => { },
Err(e) => {
if e.get_errno() == EINTR {
continue;
} else {
break;
}
}
}
}
}
}
const MSG_SIZE: usize = 64;
pub struct Message {
msg: zmq_ffi::zmq_msg_t,
}
unsafe extern "C" fn zmq_free_fn(data: *mut c_void, hint: *mut c_void) {
let len = transmute(hint);
let slice = slice::from_raw_parts_mut(transmute::<*mut c_void, *mut u8>(data), len);
let _: Box<[u8]> = Box::from_raw(slice);
}
impl Message {
pub fn new() -> Result<Message, Error> {
let mut msg = zmq_ffi::zmq_msg_t { unknown: [0; MSG_SIZE] };
let rc = unsafe { zmq_ffi::zmq_msg_init(&mut msg) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(Message { msg: msg })
}
}
pub fn with_capcity(len: usize) -> Result<Message, Error> {
let mut msg = zmq_ffi::zmq_msg_t { unknown: [0; MSG_SIZE] };
let rc = unsafe { zmq_ffi::zmq_msg_init_size(&mut msg, len as size_t) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(Message { msg: msg })
}
}
pub fn from_vec(vec: Vec<u8>) -> Result<Message, Error> {
let len = vec.len() as size_t;
let data = vec.into_boxed_slice();
let free_fn = unsafe { transmute(zmq_free_fn) };
let mut msg = zmq_ffi::zmq_msg_t { unknown: [0; MSG_SIZE] };
let rc = unsafe {
zmq_ffi::zmq_msg_init_data(&mut msg, Box::into_raw(data) as *mut c_void, len,
free_fn, transmute(len))
};
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(Message { msg: msg })
}
}
pub fn from_slice(data: &[u8]) -> Result<Message, Error> {
unsafe {
let mut msg = try!(Message::with_capcity(data.len()));
std::ptr::copy_nonoverlapping(data.as_ptr(), msg.as_mut_ptr(), data.len());
Ok(msg)
}
}
pub fn msg_move(dest: &mut Message, src: &mut Message) -> Result<(), Error> {
let rc = unsafe {
zmq_ffi::zmq_msg_move(&mut dest.msg, &mut src.msg)
};
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(())
}
}
pub fn msg_copy(dest: &mut Message, src: &Message) -> Result<(), Error> {
let rc = unsafe {
zmq_ffi::zmq_msg_copy(&mut dest.msg, transmute(&src.msg))
};
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(())
}
}
pub unsafe fn get_data_ptr(&mut self) -> *mut c_void {
zmq_ffi::zmq_msg_data(&mut self.msg)
}
pub unsafe fn get_const_data_ptr(&self) -> *const c_void {
zmq_ffi::zmq_msg_data(transmute(&self.msg))
}
pub fn len(&self) -> usize {
unsafe { zmq_ffi::zmq_msg_size(transmute(&self.msg)) }
}
pub fn has_more(&self) -> bool {
unsafe { zmq_ffi::zmq_msg_more(transmute(&self.msg)) > 0 }
}
pub fn get_property(&self, property: MessageProperty) -> Result<i32, Error> {
let rc = unsafe { zmq_ffi::zmq_msg_get(transmute(&self.msg), property as c_int) };
if rc == -1 {
Err(Error::from_last_err())
} else {
Ok(rc)
}
}
pub fn get_meta<'a>(&'a self, property: &str) -> Option<&'a str> {
let prop_cstr = ffi::CString::new(property).unwrap();
let returned_str_ptr = unsafe { zmq_ffi::zmq_msg_gets(transmute(&self.msg), transmute(prop_cstr.as_ptr())) };
if returned_str_ptr.is_null() {
None
} else {
unsafe { Some(ffi::CStr::from_ptr(returned_str_ptr).to_str().unwrap()) }
}
}
}
impl Deref for Message {
type Target = [u8];
fn deref<'a>(&'a self) -> &'a [u8] {
unsafe {
let ptr = self.get_const_data_ptr();
let len = self.len() as usize;
slice::from_raw_parts(transmute(ptr), len)
}
}
}
impl DerefMut for Message {
fn deref_mut<'a>(&'a mut self) -> &'a mut [u8] {
unsafe {
let ptr = self.get_data_ptr();
let len = self.len() as usize;
slice::from_raw_parts_mut(transmute(ptr), len)
}
}
}
impl Drop for Message {
fn drop(&mut self) {
loop {
let rc = unsafe { zmq_ffi::zmq_msg_close(&mut self.msg) };
if rc != 0 {
let e = Error::from_last_err();
if e.get_errno() == EINTR {
continue;
} else {
panic!(e);
}
} else {
break;
}
}
}
}
pub type SocketType = c_int;
pub const PAIR: SocketType = 0;
pub const PUB: SocketType = 1;
pub const SUB: SocketType = 2;
pub const REQ: SocketType = 3;
pub const REP: SocketType = 4;
pub const DEALER: SocketType = 5;
pub const ROUTER: SocketType = 6;
pub const PULL: SocketType = 7;
pub const PUSH: SocketType = 8;
pub const XPUB: SocketType = 9;
pub const XSUB: SocketType = 10;
pub const STREAM: SocketType = 11;
pub type MessageProperty = c_int;
pub const MORE: MessageProperty = 1;
pub const SRCFD: MessageProperty = 2;
pub const SHARED: MessageProperty = 3;
pub type SecurityMechanism = c_int;
pub const ZMQ_NULL: SecurityMechanism = 0;
pub const ZMQ_PLAIN: SecurityMechanism = 1;
pub const ZMQ_CURVE: SecurityMechanism = 2;
pub const ZMQ_GSSAPI: SecurityMechanism = 3;
pub fn has_capability(capability: &str) -> bool {
let capability_cstr = ffi::CString::new(capability).unwrap();
let rc = unsafe { zmq_ffi::zmq_has(capability_cstr.as_ptr()) };
rc == 1
}
pub fn z85_encode(data: &[u8]) -> Result<String, Error> {
let len = data.len() as i32 * 5 / 4 + 1;
let mut dest: Vec<u8> = Vec::with_capacity(len as usize);
let rc = unsafe { zmq_ffi::zmq_z85_encode(transmute(dest.as_mut_ptr()), data.as_ptr(), data.len()) };
if rc.is_null() {
Err(Error::from_last_err())
} else {
unsafe {
dest.set_len(len as usize);
let cstr = ffi::CStr::from_ptr(transmute(dest.as_ptr()));
Ok(String::from_utf8(cstr.to_bytes().to_vec()).unwrap())
}
}
}
pub fn z85_decode(encoded: &str) -> Result<Vec<u8>, Error> {
let encoded_cstr = ffi::CString::new(encoded).unwrap();
let len = (encoded_cstr.as_bytes().len() as i32 * 4 / 5) as i32;
let mut dest: Vec<u8> = Vec::with_capacity(len as usize);
let rc = unsafe { zmq_ffi::zmq_z85_decode(dest.as_mut_ptr(), encoded_cstr.as_ptr()) };
if rc.is_null() {
Err(Error::from_last_err())
} else {
unsafe {
dest.set_len(len as usize);
}
Ok(dest)
}
}
pub fn gen_curve_keypair() -> Result<(String, String), Error> {
let mut public_key: Vec<u8> = Vec::with_capacity(41);
let mut secret_key: Vec<u8> = Vec::with_capacity(41);
let rc = unsafe {
zmq_ffi::zmq_curve_keypair(
transmute(public_key.as_mut_ptr()),
transmute(secret_key.as_mut_ptr())
)
};
if rc == -1 {
Err(Error::from_last_err())
} else {
unsafe {
public_key.set_len(40);
secret_key.set_len(40);
}
Ok((String::from_utf8(public_key).unwrap(), String::from_utf8(secret_key).unwrap()))
}
}