Merge pull request #572 from hintjens/master

Updated ZAP PLAIN request to follow latest draft

doc/zmq_msg_send.txt

@@ -23,9 +23,10 @@ argument to be sent to the socket referenced by the 'socket' argument.  The
 'flags' argument is a combination of the flags defined below:
 
 *ZMQ_DONTWAIT*::
-Specifies that the operation should be performed in non-blocking mode. If the
-message cannot be queued on the 'socket', the _zmq_msg_send()_ function shall
-fail with 'errno' set to EAGAIN.
+For socket types (DEALER, PUSH) that block when there are no available peers 
+(or all peers have full high-water mark), specifies that the operation should 
+be performed in non-blocking mode. If the message cannot be queued on the 
+'socket', the _zmq_msg_send()_ function shall fail with 'errno' set to EAGAIN. 
 
 *ZMQ_SNDMORE*::
 Specifies that the message being sent is a multi-part message, and that further

doc/zmq_send.txt

@@ -19,9 +19,10 @@ referenced by the 'buf' and 'len' arguments. The 'flags' argument is
 a combination of the flags defined below:
 
 *ZMQ_DONTWAIT*::
-Specifies that the operation should be performed in non-blocking mode. If the
-message cannot be queued on the 'socket', the _zmq_send()_ function shall
-fail with 'errno' set to EAGAIN.
+For socket types (DEALER, PUSH) that block when there are no available peers 
+(or all peers have full high-water mark), specifies that the operation should 
+be performed in non-blocking mode. If the message cannot be queued on the 
+'socket', the _zmq_send()_ function shall fail with 'errno' set to EAGAIN.
 
 *ZMQ_SNDMORE*::
 Specifies that the message being sent is a multi-part message, and that further

doc/zmq_sendmsg.txt

@@ -19,9 +19,10 @@ argument to be sent to the socket referenced by the 'socket' argument.  The
 'flags' argument is a combination of the flags defined below:
 
 *ZMQ_DONTWAIT*::
-Specifies that the operation should be performed in non-blocking mode. If the
-message cannot be queued on the 'socket', the _zmq_sendmsg()_ function shall
-fail with 'errno' set to EAGAIN.
+For socket types (DEALER, PUSH) that block when there are no available peers 
+(or all peers have full high-water mark), specifies that the operation should 
+be performed in non-blocking mode. If the message cannot be queued on the 
+'socket', the _zmq_sendmsg()_ function shall fail with 'errno' set to EAGAIN.
 
 *ZMQ_SNDMORE*::
 Specifies that the message being sent is a multi-part message, and that further

doc/zmq_socket.txt

@@ -71,11 +71,9 @@ sequence of _zmq_send(request)_ and subsequent _zmq_recv(reply)_ calls. Each
 request sent is round-robined among all _services_, and each reply received is
 matched with the last issued request.
 
-When a 'ZMQ_REQ' socket enters the 'mute' state due to having reached the
-high water mark for all _services_, or if there are no _services_ at all, then
-any linkzmq:zmq_send[3] operations on the socket shall block until the
-'mute' state ends or at least one _service_ becomes available for sending;
-messages are not discarded.
+If no services are available, then any send operation on the socket shall 
+block until at least one _service_ becomes available. The REQ socket shall
+not discard messages.
 
 [horizontal]
 .Summary of ZMQ_REQ characteristics
@@ -94,11 +92,7 @@ send replies to a _client_. This socket type allows only an alternating
 sequence of _zmq_recv(request)_ and subsequent _zmq_send(reply)_ calls. Each
 request received is fair-queued from among all _clients_, and each reply sent
 is routed to the _client_ that issued the last request. If the original
-requester doesn't exist any more the reply is silently discarded.
-
-When a 'ZMQ_REP' socket enters the 'mute' state due to having reached the
-high water mark for a _client_, then any replies sent to the _client_ in
-question shall be dropped until the mute state ends.
+requester does not exist any more the reply is silently discarded.
 
 [horizontal]
 .Summary of ZMQ_REP characteristics
@@ -107,7 +101,6 @@ Direction:: Bidirectional
 Send/receive pattern:: Receive, Send, Receive, Send, ...
 Incoming routing strategy:: Fair-queued
 Outgoing routing strategy:: Last peer
-Action in mute state:: Drop
 
 
 ZMQ_DEALER
@@ -126,8 +119,6 @@ When a 'ZMQ_DEALER' socket is connected to a 'ZMQ_REP' socket each message sent
 must consist of an empty message part, the _delimiter_, followed by one or more
 _body parts_.
 
-Deprecated alias: 'ZMQ_XREQ'.
-
 [horizontal]
 .Summary of ZMQ_DEALER characteristics
 Compatible peer sockets:: 'ZMQ_ROUTER', 'ZMQ_REP', 'ZMQ_DEALER'
@@ -162,8 +153,6 @@ as seen by the application becomes: one or more _identity_ parts, _delimiter_
 part, one or more _body parts_. When sending replies to a 'ZMQ_REQ' socket the
 application must include the _delimiter_ part.
 
-Deprecated alias: 'ZMQ_XREP'.
-
 [horizontal]
 .Summary of ZMQ_ROUTER characteristics
 Compatible peer sockets:: 'ZMQ_DEALER', 'ZMQ_REQ', 'ZMQ_ROUTER'
@@ -216,7 +205,6 @@ Direction:: Unidirectional
 Send/receive pattern:: Receive only
 Incoming routing strategy:: Fair-queued
 Outgoing routing strategy:: N/A
-Action in mute state:: Drop
 
 
 ZMQ_XPUB

src/plain_mechanism.cpp

@@ -262,18 +262,21 @@ int zmq::plain_mechanism_t::process_hello_command (msg_t *msg_)
     rc = session->write_zap_msg (&msg);
     errno_assert (rc == 0);
 
-    //  Credentials frame
-    rc = msg.init_size (1 + username_length + 1 + password_length);
+    //  Username frame
+    rc = msg.init_size (username_length);
     errno_assert (rc == 0);
-    char *data_ptr = static_cast <char *> (msg.data ());
-    *data_ptr++ = static_cast <unsigned char> (username_length);
-    memcpy (data_ptr, username.c_str (), username_length);
-    data_ptr += username_length;
-    *data_ptr++ = static_cast <unsigned char> (password_length);
-    memcpy (data_ptr, password.c_str (), password_length);
+    memcpy (msg.data (), username.c_str (), username_length);
+    msg.set_flags (msg_t::more);
     rc = session->write_zap_msg (&msg);
     errno_assert (rc == 0);
-
+    
+    //  Password frame
+    rc = msg.init_size (password_length);
+    errno_assert (rc == 0);
+    memcpy (msg.data (), password.c_str (), password_length);
+    rc = session->write_zap_msg (&msg);
+    errno_assert (rc == 0);
+    
     return 0;
 }
 

tests/test_security.cpp

@@ -21,33 +21,12 @@
 #include <string.h>
 #include "testutil.hpp"
 
-static bool
-authenticate (const unsigned char *data, size_t data_length)
-{
-    const char *username = "admin";
-    const size_t username_length = strlen (username);
-    const char *password = "password";
-    const size_t password_length = strlen (password);
-
-    if (data_length != 1 + username_length + 1 + password_length)
-        return false;
-    if (data [0] != username_length)
-        return false;
-    if (memcmp (data + 1, username, username_length))
-        return false;
-    if (data [1 + username_length] != password_length)
-        return false;
-    if (memcmp (data + 1 + username_length + 1, password, password_length))
-        return false;
-    return true;
-}
-
 static void *
 zap_handler (void *zap)
 {
     int rc, more;
     size_t optlen;
-    zmq_msg_t version, seqno, domain, mechanism, credentials;
+    zmq_msg_t version, seqno, domain, mechanism, username, password;
     zmq_msg_t status_code, status_text, user_id;
 
     //  Version
@@ -86,17 +65,24 @@ zap_handler (void *zap)
     rc = zmq_getsockopt (zap, ZMQ_RCVMORE, &more, &optlen);
     assert (rc == 0 && more == 1);
 
-    //  Credentials
-    rc = zmq_msg_init (&credentials);
+    //  Username
+    rc = zmq_msg_init (&username);
+    assert (rc == 0);
+    rc = zmq_msg_recv (&username, zap, 0);
+    bool username_ok = (rc == 5 && memcmp (zmq_msg_data (&username), "admin", 5) == 0);
+    optlen = sizeof more;
+    rc = zmq_getsockopt (zap, ZMQ_RCVMORE, &more, &optlen);
+    assert (rc == 0 && more == 1);
+    
+    //  Password
+    rc = zmq_msg_init (&password);
     assert (rc == 0);
-    rc = zmq_msg_recv (&credentials, zap, 0);
+    rc = zmq_msg_recv (&password, zap, 0);
     optlen = sizeof more;
     rc = zmq_getsockopt (zap, ZMQ_RCVMORE, &more, &optlen);
     assert (rc == 0 && more == 0);
-
-    const bool auth_ok =
-        authenticate ((unsigned char *) zmq_msg_data (&credentials),
-                      zmq_msg_size (&credentials));
+    
+    bool password_ok = (rc == 8 && memcmp (zmq_msg_data (&password), "password", 8) == 0);
 
     rc = zmq_msg_send (&version, zap, ZMQ_SNDMORE);
     assert (rc == 3);
@@ -106,7 +92,7 @@ zap_handler (void *zap)
 
     rc = zmq_msg_init_size (&status_code, 3);
     assert (rc == 0);
-    memcpy (zmq_msg_data (&status_code), auth_ok? "200": "400", 3);
+    memcpy (zmq_msg_data (&status_code), username_ok && password_ok? "200": "400", 3);
     rc = zmq_msg_send (&status_code, zap, ZMQ_SNDMORE);
     assert (rc == 3);
 
@@ -126,9 +112,12 @@ zap_handler (void *zap)
     rc = zmq_msg_close (&mechanism);
     assert (rc == 0);
 
-    rc = zmq_msg_close (&credentials);
+    rc = zmq_msg_close (&username);
     assert (rc == 0);
 
+    rc = zmq_msg_close (&password);
+    assert (rc == 0);
+    
     rc = zmq_close (zap);
     assert (rc == 0);