Split plain_mechanism into client and server part

src/Makefile.am

@@ -59,7 +59,8 @@ libzmq_la_SOURCES = \
     pgm_sender.hpp \
     pgm_socket.hpp \
     pipe.hpp \
-    plain_mechanism.hpp \
+    plain_client.hpp \
+    plain_server.hpp \
     platform.hpp \
     poll.hpp \
     poller.hpp \
@@ -132,7 +133,8 @@ libzmq_la_SOURCES = \
     pgm_sender.cpp \
     pgm_socket.cpp \
     pipe.cpp \
-    plain_mechanism.cpp \
+    plain_client.cpp \
+    plain_server.cpp \
     poll.cpp \
     poller_base.cpp \
     pull.cpp \

src/plain_client.cpp

@@ -0,0 +1,185 @@
+/*
+    Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "platform.hpp"
+#ifdef ZMQ_HAVE_WINDOWS
+#include "windows.hpp"
+#endif
+
+#include <string>
+
+#include "msg.hpp"
+#include "err.hpp"
+#include "plain_client.hpp"
+
+zmq::plain_client_t::plain_client_t (const options_t &options_) :
+    mechanism_t (options_),
+    state (sending_hello)
+{
+}
+
+zmq::plain_client_t::~plain_client_t ()
+{
+}
+
+int zmq::plain_client_t::next_handshake_command (msg_t *msg_)
+{
+    int rc = 0;
+
+    switch (state) {
+        case sending_hello:
+            rc = produce_hello (msg_);
+            if (rc == 0)
+                state = waiting_for_welcome;
+            break;
+        case sending_initiate:
+            rc = produce_initiate (msg_);
+            if (rc == 0)
+                state = waiting_for_ready;
+            break;
+        default:
+            errno = EAGAIN;
+            rc = -1;
+    }
+    return rc;
+}
+
+int zmq::plain_client_t::process_handshake_command (msg_t *msg_)
+{
+    int rc = 0;
+
+    switch (state) {
+        case waiting_for_welcome:
+            rc = process_welcome (msg_);
+            if (rc == 0)
+                state = sending_initiate;
+            break;
+        case waiting_for_ready:
+            rc = process_ready (msg_);
+            if (rc == 0)
+                state = ready;
+            break;
+        default:
+            //  Temporary support for security debugging
+            puts ("PLAIN I: invalid handshake command");
+            errno = EPROTO;
+            rc = -1;
+            break;
+    }
+    if (rc == 0) {
+        rc = msg_->close ();
+        errno_assert (rc == 0);
+        rc = msg_->init ();
+        errno_assert (rc == 0);
+    }
+    return rc;
+}
+
+zmq::mechanism_t::status_t zmq::plain_client_t::status () const
+{
+    return state == ready? mechanism_t::ready: mechanism_t::handshaking;
+}
+
+int zmq::plain_client_t::produce_hello (msg_t *msg_) const
+{
+    const std::string username = options.plain_username;
+    zmq_assert (username.length () < 256);
+
+    const std::string password = options.plain_password;
+    zmq_assert (password.length () < 256);
+
+    const size_t command_size = 6 + 1 + username.length ()
+                                  + 1 + password.length ();
+
+    const int rc = msg_->init_size (command_size);
+    errno_assert (rc == 0);
+
+    unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
+    memcpy (ptr, "\x05HELLO", 6);
+    ptr += 6;
+
+    *ptr++ = static_cast <unsigned char> (username.length ());
+    memcpy (ptr, username.c_str (), username.length ());
+    ptr += username.length ();
+
+    *ptr++ = static_cast <unsigned char> (password.length ());
+    memcpy (ptr, password.c_str (), password.length ());
+    ptr += password.length ();
+
+    return 0;
+}
+
+int zmq::plain_client_t::process_welcome (msg_t *msg_)
+{
+    const unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
+    const size_t bytes_left = msg_->size ();
+
+    if (bytes_left != 8 ||  memcmp (ptr, "\x07WELCOME", 8)) {
+        //  Temporary support for security debugging
+        puts ("PLAIN I: invalid PLAIN client, did not send WELCOME");
+        errno = EPROTO;
+        return -1;
+    }
+    return 0;
+}
+
+int zmq::plain_client_t::produce_initiate (msg_t *msg_) const
+{
+    unsigned char * const command_buffer = (unsigned char *) malloc (512);
+    alloc_assert (command_buffer);
+
+    unsigned char *ptr = command_buffer;
+
+    //  Add mechanism string
+    memcpy (ptr, "\x08INITIATE", 9);
+    ptr += 9;
+
+    //  Add socket type property
+    const char *socket_type = socket_type_string (options.type);
+    ptr += add_property (ptr, "Socket-Type", socket_type, strlen (socket_type));
+
+    //  Add identity property
+    if (options.type == ZMQ_REQ
+    ||  options.type == ZMQ_DEALER
+    ||  options.type == ZMQ_ROUTER)
+        ptr += add_property (
+            ptr, "Identity", options.identity, options.identity_size);
+
+    const size_t command_size = ptr - command_buffer;
+    const int rc = msg_->init_size (command_size);
+    errno_assert (rc == 0);
+    memcpy (msg_->data (), command_buffer, command_size);
+    free (command_buffer);
+
+    return 0;
+}
+
+int zmq::plain_client_t::process_ready (msg_t *msg_)
+{
+    const unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
+    const size_t bytes_left = msg_->size ();
+
+    if (bytes_left < 6 || memcmp (ptr, "\x05READY", 6)) {
+        //  Temporary support for security debugging
+        puts ("PLAIN I: invalid PLAIN client, did not send READY");
+        errno = EPROTO;
+        return -1;
+    }
+    return parse_metadata (ptr + 6, bytes_left - 6);
+}

src/plain_client.hpp

@@ -0,0 +1,64 @@
+/*
+    Copyright (c) 2007-2014 Contributors as noted in the AUTHORS file
+
+    This file is part of 0MQ.
+
+    0MQ is free software; you can redistribute it and/or modify it under
+    the terms of the GNU Lesser General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    0MQ is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Lesser General Public License for more details.
+
+    You should have received a copy of the GNU Lesser General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+#ifndef __ZMQ_PLAIN_CLIENT_HPP_INCLUDED__
+#define __ZMQ_PLAIN_CLIENT_HPP_INCLUDED__
+
+#include "mechanism.hpp"
+#include "options.hpp"
+
+namespace zmq
+{
+
+    class msg_t;
+
+    class plain_client_t : public mechanism_t
+    {
+    public:
+
+        plain_client_t (const options_t &options_);
+        virtual ~plain_client_t ();
+
+        // mechanism implementation
+        virtual int next_handshake_command (msg_t *msg_);
+        virtual int process_handshake_command (msg_t *msg_);
+        virtual status_t status () const;
+
+    private:
+
+        enum state_t {
+            sending_hello,
+            waiting_for_welcome,
+            sending_initiate,
+            waiting_for_ready,
+            ready
+        };
+
+        state_t state;
+
+        int produce_hello (msg_t *msg_) const;
+        int produce_initiate (msg_t *msg_) const;
+
+        int process_welcome (msg_t *msg);
+        int process_ready (msg_t *msg_);
+    };
+
+}
+
+#endif

src/plain_server.cpp

@@ -27,44 +27,34 @@
 #include "msg.hpp"
 #include "session_base.hpp"
 #include "err.hpp"
-#include "plain_mechanism.hpp"
+#include "plain_server.hpp"
 #include "wire.hpp"
 
-zmq::plain_mechanism_t::plain_mechanism_t (session_base_t *session_,
-                                           const std::string &peer_address_,
-                                           const options_t &options_) :
+zmq::plain_server_t::plain_server_t (session_base_t *session_,
+                                     const std::string &peer_address_,
+                                     const options_t &options_) :
     mechanism_t (options_),
     session (session_),
     peer_address (peer_address_),
     expecting_zap_reply (false),
-    state (options.as_server? waiting_for_hello: sending_hello)
+    state (waiting_for_hello)
 {
 }
 
-zmq::plain_mechanism_t::~plain_mechanism_t ()
+zmq::plain_server_t::~plain_server_t ()
 {
 }
 
-int zmq::plain_mechanism_t::next_handshake_command (msg_t *msg_)
+int zmq::plain_server_t::next_handshake_command (msg_t *msg_)
 {
     int rc = 0;
 
     switch (state) {
-        case sending_hello:
-            rc = produce_hello (msg_);
-            if (rc == 0)
-                state = waiting_for_welcome;
-            break;
         case sending_welcome:
             rc = produce_welcome (msg_);
             if (rc == 0)
                 state = waiting_for_initiate;
             break;
-        case sending_initiate:
-            rc = produce_initiate (msg_);
-            if (rc == 0)
-                state = waiting_for_ready;
-            break;
         case sending_ready:
             rc = produce_ready (msg_);
             if (rc == 0)
@@ -77,7 +67,7 @@ int zmq::plain_mechanism_t::next_handshake_command (msg_t *msg_)
     return rc;
 }
 
-int zmq::plain_mechanism_t::process_handshake_command (msg_t *msg_)
+int zmq::plain_server_t::process_handshake_command (msg_t *msg_)
 {
     int rc = 0;
 
@@ -87,21 +77,11 @@ int zmq::plain_mechanism_t::process_handshake_command (msg_t *msg_)
             if (rc == 0)
                 state = expecting_zap_reply? waiting_for_zap_reply: sending_welcome;
             break;
-        case waiting_for_welcome:
-            rc = process_welcome (msg_);
-            if (rc == 0)
-                state = sending_initiate;
-            break;
         case waiting_for_initiate:
             rc = process_initiate (msg_);
             if (rc == 0)
                 state = sending_ready;
             break;
-        case waiting_for_ready:
-            rc = process_ready (msg_);
-            if (rc == 0)
-                state = ready;
-            break;
         default:
             //  Temporary support for security debugging
             puts ("PLAIN I: invalid handshake command");
@@ -118,12 +98,12 @@ int zmq::plain_mechanism_t::process_handshake_command (msg_t *msg_)
     return rc;
 }
 
-zmq::mechanism_t::status_t zmq::plain_mechanism_t::status () const
+zmq::mechanism_t::status_t zmq::plain_server_t::status () const
 {
     return state == ready? mechanism_t::ready: mechanism_t::handshaking;
 }
 
-int zmq::plain_mechanism_t::zap_msg_available ()
+int zmq::plain_server_t::zap_msg_available ()
 {
     if (state != waiting_for_zap_reply) {
         errno = EFSM;
@@ -135,37 +115,7 @@ int zmq::plain_mechanism_t::zap_msg_available ()
     return rc;
 }
 
-int zmq::plain_mechanism_t::produce_hello (msg_t *msg_) const
-{
-    const std::string username = options.plain_username;
-    zmq_assert (username.length () < 256);
-
-    const std::string password = options.plain_password;
-    zmq_assert (password.length () < 256);
-
-    const size_t command_size = 6 + 1 + username.length ()
-                                  + 1 + password.length ();
-
-    const int rc = msg_->init_size (command_size);
-    errno_assert (rc == 0);
-
-    unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
-    memcpy (ptr, "\x05HELLO", 6);
-    ptr += 6;
-
-    *ptr++ = static_cast <unsigned char> (username.length ());
-    memcpy (ptr, username.c_str (), username.length ());
-    ptr += username.length ();
-
-    *ptr++ = static_cast <unsigned char> (password.length ());
-    memcpy (ptr, password.c_str (), password.length ());
-    ptr += password.length ();
-
-    return 0;
-}
-
-
-int zmq::plain_mechanism_t::process_hello (msg_t *msg_)
+int zmq::plain_server_t::process_hello (msg_t *msg_)
 {
     const unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
     size_t bytes_left = msg_->size ();
@@ -238,7 +188,7 @@ int zmq::plain_mechanism_t::process_hello (msg_t *msg_)
     return 0;
 }
 
-int zmq::plain_mechanism_t::produce_welcome (msg_t *msg_) const
+int zmq::plain_server_t::produce_welcome (msg_t *msg_) const
 {
     const int rc = msg_->init_size (8);
     errno_assert (rc == 0);
@@ -246,54 +196,10 @@ int zmq::plain_mechanism_t::produce_welcome (msg_t *msg_) const
     return 0;
 }
 
-int zmq::plain_mechanism_t::process_welcome (msg_t *msg_)
+int zmq::plain_server_t::process_initiate (msg_t *msg_)
 {
     const unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
-    size_t bytes_left = msg_->size ();
-
-    if (bytes_left != 8 ||  memcmp (ptr, "\x07WELCOME", 8)) {
-        //  Temporary support for security debugging
-        puts ("PLAIN I: invalid PLAIN client, did not send WELCOME");
-        errno = EPROTO;
-        return -1;
-    }
-    return 0;
-}
-
-int zmq::plain_mechanism_t::produce_initiate (msg_t *msg_) const
-{
-    unsigned char * const command_buffer = (unsigned char *) malloc (512);
-    alloc_assert (command_buffer);
-
-    unsigned char *ptr = command_buffer;
-
-    //  Add mechanism string
-    memcpy (ptr, "\x08INITIATE", 9);
-    ptr += 9;
-
-    //  Add socket type property
-    const char *socket_type = socket_type_string (options.type);
-    ptr += add_property (ptr, "Socket-Type", socket_type, strlen (socket_type));
-
-    //  Add identity property
-    if (options.type == ZMQ_REQ
-    ||  options.type == ZMQ_DEALER
-    ||  options.type == ZMQ_ROUTER)
-        ptr += add_property (ptr, "Identity", options.identity, options.identity_size);
-
-    const size_t command_size = ptr - command_buffer;
-    const int rc = msg_->init_size (command_size);
-    errno_assert (rc == 0);
-    memcpy (msg_->data (), command_buffer, command_size);
-    free (command_buffer);
-
-    return 0;
-}
-
-int zmq::plain_mechanism_t::process_initiate (msg_t *msg_)
-{
-    const unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
-    size_t bytes_left = msg_->size ();
+    const size_t bytes_left = msg_->size ();
 
     if (bytes_left < 9 || memcmp (ptr, "\x08INITIATE", 9)) {
         //  Temporary support for security debugging
@@ -301,12 +207,10 @@ int zmq::plain_mechanism_t::process_initiate (msg_t *msg_)
         errno = EPROTO;
         return -1;
     }
-    ptr += 9;
-    bytes_left -= 9;
-    return parse_metadata (ptr, bytes_left);
+    return parse_metadata (ptr + 9, bytes_left - 9);
 }
 
-int zmq::plain_mechanism_t::produce_ready (msg_t *msg_) const
+int zmq::plain_server_t::produce_ready (msg_t *msg_) const
 {
     unsigned char * const command_buffer = (unsigned char *) malloc (512);
     alloc_assert (command_buffer);
@@ -325,7 +229,8 @@ int zmq::plain_mechanism_t::produce_ready (msg_t *msg_) const
     if (options.type == ZMQ_REQ
     ||  options.type == ZMQ_DEALER
     ||  options.type == ZMQ_ROUTER)
-        ptr += add_property (ptr, "Identity", options.identity, options.identity_size);
+        ptr += add_property (
+            ptr, "Identity", options.identity, options.identity_size);
 
     const size_t command_size = ptr - command_buffer;
     const int rc = msg_->init_size (command_size);
@@ -336,24 +241,8 @@ int zmq::plain_mechanism_t::produce_ready (msg_t *msg_) const
     return 0;
 }
 
-int zmq::plain_mechanism_t::process_ready (msg_t *msg_)
-{
-    const unsigned char *ptr = static_cast <unsigned char *> (msg_->data ());
-    size_t bytes_left = msg_->size ();
-
-    if (bytes_left < 6 || memcmp (ptr, "\x05READY", 6)) {
-        //  Temporary support for security debugging
-        puts ("PLAIN I: invalid PLAIN client, did not send READY");
-        errno = EPROTO;
-        return -1;
-    }
-    ptr += 6;
-    bytes_left -= 6;
-    return parse_metadata (ptr, bytes_left);
-}
-
-void zmq::plain_mechanism_t::send_zap_request (const std::string &username,
-                                               const std::string &password)
+void zmq::plain_server_t::send_zap_request (const std::string &username,
+                                            const std::string &password)
 {
     int rc;
     msg_t msg;
@@ -429,7 +318,7 @@ void zmq::plain_mechanism_t::send_zap_request (const std::string &username,
     errno_assert (rc == 0);
 }
 
-int zmq::plain_mechanism_t::receive_and_process_zap_reply ()
+int zmq::plain_server_t::receive_and_process_zap_reply ()
 {
     int rc = 0;
     msg_t msg [7];  //  ZAP reply consists of 7 frames

src/plain_server.hpp

@@ -17,8 +17,8 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#ifndef __ZMQ_PLAIN_MECHANISM_HPP_INCLUDED__
-#define __ZMQ_PLAIN_MECHANISM_HPP_INCLUDED__
+#ifndef __ZMQ_PLAIN_SERVER_HPP_INCLUDED__
+#define __ZMQ_PLAIN_SERVER_HPP_INCLUDED__
 
 #include "mechanism.hpp"
 #include "options.hpp"
@@ -29,14 +29,14 @@ namespace zmq
     class msg_t;
     class session_base_t;
 
-    class plain_mechanism_t : public mechanism_t
+    class plain_server_t : public mechanism_t
     {
     public:
 
-        plain_mechanism_t (session_base_t *session_,
-                           const std::string &peer_address_,
-                           const options_t &options_);
-        virtual ~plain_mechanism_t ();
+        plain_server_t (session_base_t *session_,
+                        const std::string &peer_address_,
+                        const options_t &options_);
+        virtual ~plain_server_t ();
 
         // mechanism implementation
         virtual int next_handshake_command (msg_t *msg_);
@@ -47,14 +47,10 @@ namespace zmq
     private:
 
         enum state_t {
-            sending_hello,
             waiting_for_hello,
             sending_welcome,
-            waiting_for_welcome,
-            sending_initiate,
             waiting_for_initiate,
             sending_ready,
-            waiting_for_ready,
             waiting_for_zap_reply,
             ready
         };
@@ -68,14 +64,10 @@ namespace zmq
 
         state_t state;
 
-        int produce_hello (msg_t *msg_) const;
         int produce_welcome (msg_t *msg_) const;
-        int produce_initiate (msg_t *msg_) const;
         int produce_ready (msg_t *msg_) const;
 
         int process_hello (msg_t *msg_);
-        int process_welcome (msg_t *msg);
-        int process_ready (msg_t *msg_);
         int process_initiate (msg_t *msg_);
 
         void send_zap_request (const std::string &username,

src/stream_engine.cpp

@@ -43,7 +43,8 @@
 #include "v2_encoder.hpp"
 #include "v2_decoder.hpp"
 #include "null_mechanism.hpp"
-#include "plain_mechanism.hpp"
+#include "plain_client.hpp"
+#include "plain_server.hpp"
 #include "gssapi_client.hpp"
 #include "gssapi_server.hpp"
 #include "curve_client.hpp"
@@ -599,8 +600,12 @@ bool zmq::stream_engine_t::handshake ()
         }
         else
         if (memcmp (greeting_recv + 12, "PLAIN\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 20) == 0) {
-            mechanism = new (std::nothrow)
-                plain_mechanism_t (session, peer_address, options);
+            if (options.as_server)
+                mechanism = new (std::nothrow)
+                    plain_server_t (session, peer_address, options);
+            else
+                mechanism = new (std::nothrow)
+                    plain_client_t (options);
             alloc_assert (mechanism);
         }
 #ifdef HAVE_LIBSODIUM