ZMQ_SNDBUF and ZMQ_RCVBUF type changed to int

This mimics POSIX specification.
Signed-off-by: Martin Sustrik <sustrik@250bpm.com>

doc/zmq_getsockopt.txt

@@ -159,7 +159,7 @@ in effect. For details refer to your operating system documentation for the
 'SO_SNDBUF' socket option.
 
 [horizontal]
-Option value type:: uint64_t
+Option value type:: int
 Option value unit:: bytes
 Default value:: 0
 Applicable socket types:: all
@@ -173,7 +173,7 @@ in effect. For details refer to your operating system documentation for the
 'SO_RCVBUF' socket option.
 
 [horizontal]
-Option value type:: uint64_t
+Option value type:: int
 Option value unit:: bytes
 Default value:: 0
 Applicable socket types:: all

doc/zmq_setsockopt.txt

@@ -164,7 +164,7 @@ the OS default unchanged. For details please refer to your operating system
 documentation for the 'SO_SNDBUF' socket option.
 
 [horizontal]
-Option value type:: uint64_t
+Option value type:: int
 Option value unit:: bytes
 Default value:: 0
 Applicable socket types:: all
@@ -178,7 +178,7 @@ OS default unchanged. For details refer to your operating system documentation
 for the 'SO_RCVBUF' socket option.
 
 [horizontal]
-Option value type:: uint64_t
+Option value type:: int
 Option value unit:: bytes
 Default value:: 0
 Applicable socket types:: all

src/options.cpp

@@ -87,7 +87,7 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
         return 0;
         
     case ZMQ_RECOVERY_IVL:
-        if (optvallen_ != sizeof (int64_t)  || *((int64_t*) optval_) < 0) {
+        if (optvallen_ != sizeof (int64_t) || *((int64_t*) optval_) < 0) {
             errno = EINVAL;
             return -1;
         }
@@ -95,19 +95,19 @@ int zmq::options_t::setsockopt (int option_, const void *optval_,
         return 0;
 
     case ZMQ_SNDBUF:
-        if (optvallen_ != sizeof (uint64_t)) {
+        if (optvallen_ != sizeof (int) || *((int*) optval_) < 0) {
             errno = EINVAL;
             return -1;
         }
-        sndbuf = *((uint64_t*) optval_);
+        sndbuf = *((int*) optval_);
         return 0;
 
     case ZMQ_RCVBUF:
-        if (optvallen_ != sizeof (uint64_t)) {
+        if (optvallen_ != sizeof (int) || *((int*) optval_) < 0) {
             errno = EINVAL;
             return -1;
         }
-        rcvbuf = *((uint64_t*) optval_);
+        rcvbuf = *((int*) optval_);
         return 0;
 
     case ZMQ_LINGER:
@@ -215,21 +215,21 @@ int zmq::options_t::getsockopt (int option_, void *optval_, size_t *optvallen_)
         return 0;
 
     case ZMQ_SNDBUF:
-        if (*optvallen_ < sizeof (uint64_t)) {
+        if (*optvallen_ < sizeof (int)) {
             errno = EINVAL;
             return -1;
         }
-        *((uint64_t*) optval_) = sndbuf;
-        *optvallen_ = sizeof (uint64_t);
+        *((int*) optval_) = sndbuf;
+        *optvallen_ = sizeof (int);
         return 0;
 
     case ZMQ_RCVBUF:
-        if (*optvallen_ < sizeof (uint64_t)) {
+        if (*optvallen_ < sizeof (int)) {
             errno = EINVAL;
             return -1;
         }
-        *((uint64_t*) optval_) = rcvbuf;
-        *optvallen_ = sizeof (uint64_t);
+        *((int*) optval_) = rcvbuf;
+        *optvallen_ = sizeof (int);
         return 0;
 
     case ZMQ_TYPE:

src/options.hpp

@@ -45,8 +45,9 @@ namespace zmq
         //  Reliability time interval [ms]. Default 10 seconds.
         uint32_t recovery_ivl;
 
-        uint64_t sndbuf;
-        uint64_t rcvbuf;
+        // SO_SNDBUF and SO_RCVBUF to be passed to underlying transport sockets.
+        int sndbuf;
+        int rcvbuf;
 
         //  Socket type.
         int type;

src/tcp_socket.cpp

@@ -35,22 +35,21 @@ zmq::tcp_socket_t::~tcp_socket_t ()
         close ();
 }
 
-int zmq::tcp_socket_t::open (fd_t fd_, uint64_t sndbuf_, uint64_t rcvbuf_)
+int zmq::tcp_socket_t::open (fd_t fd_, int sndbuf_, int rcvbuf_)
 {
     zmq_assert (s == retired_fd);
     s = fd_;
 
     if (sndbuf_) {
-        int sz = (int) sndbuf_;
         int rc = setsockopt (s, SOL_SOCKET, SO_SNDBUF,
-            (char*) &sz, sizeof (int));
+            (char*) &sndbuf_, sizeof (int));
         errno_assert (rc == 0);
     }
 
     if (rcvbuf_) {
         int sz = (int) rcvbuf_;
         int rc = setsockopt (s, SOL_SOCKET, SO_RCVBUF,
-            (char*) &sz, sizeof (int));
+            (char*) &rcvbuf_, sizeof (int));
         errno_assert (rc == 0);
     }
 
@@ -145,20 +144,18 @@ zmq::tcp_socket_t::~tcp_socket_t ()
         close ();
 }
 
-int zmq::tcp_socket_t::open (fd_t fd_, uint64_t sndbuf_, uint64_t rcvbuf_)
+int zmq::tcp_socket_t::open (fd_t fd_, int sndbuf_, int rcvbuf_)
 {
     assert (s == retired_fd);
     s = fd_;
 
     if (sndbuf_) {
-        int sz = (int) sndbuf_;
-        int rc = setsockopt (s, SOL_SOCKET, SO_SNDBUF, &sz, sizeof (int));
+        int rc = setsockopt (s, SOL_SOCKET, SO_SNDBUF, &sndbuf_, sizeof (int));
         errno_assert (rc == 0);
     }
 
     if (rcvbuf_) {
-        int sz = (int) rcvbuf_;
-        int rc = setsockopt (s, SOL_SOCKET, SO_RCVBUF, &sz, sizeof (int));
+        int rc = setsockopt (s, SOL_SOCKET, SO_RCVBUF, &rcvbuf_, sizeof (int));
         errno_assert (rc == 0);
     }
 

src/tcp_socket.hpp

@@ -37,7 +37,7 @@ namespace zmq
         ~tcp_socket_t ();
 
         //  Associates a socket with a native socket descriptor.
-        int open (fd_t fd_, uint64_t sndbuf_, uint64_t rcvbuf_);
+        int open (fd_t fd_, int sndbuf_, int rcvbuf_);
          
         //  Closes the underlying socket.
         int close ();