Extend ZMQ_ROUTER_RAW test

Add test when the zeromq socket connects to a TCP socket.
The test now fails due to bug in the zeromq library.

tests/test_raw_sock.cpp

@@ -32,6 +32,7 @@
 #include <fcntl.h>
 #include <zmq.h>
 #include <unistd.h>
+#include <poll.h>
 
 //ToDo: Windows?
 const char *test_str = "TEST-STRING";
@@ -63,6 +64,42 @@ int tcp_client ()
     return sockfd;
 }
 
+int tcp_server ()
+{
+    int listenfd = socket (AF_INET, SOCK_STREAM, 0);
+    assert (listenfd != -1);
+
+    int flag = 1;
+    int rc = setsockopt (listenfd, SOL_SOCKET, SO_REUSEADDR, &flag, sizeof flag);
+    assert (rc == 0);
+
+    struct sockaddr_in serv_addr;
+    bzero (&serv_addr, sizeof serv_addr);
+    serv_addr.sin_family = AF_INET;
+    serv_addr.sin_addr.s_addr = htonl (INADDR_ANY);
+    serv_addr.sin_port = htons (5555);
+
+    rc = bind (listenfd, (struct sockaddr *) &serv_addr, sizeof serv_addr);
+    assert (rc == 0);
+
+    rc = listen (listenfd, 8);
+    assert (rc == 0);
+
+    int sockfd = accept (listenfd, NULL, NULL);
+    assert (sockfd != -1);
+
+    rc = close (listenfd);
+    assert (rc == 0);
+
+    int flags = fcntl (sockfd, F_GETFL, 0);
+    if (flags == -1)
+        flags = 0;
+    rc = fcntl (sockfd, F_SETFL, flags | O_NONBLOCK);
+    assert (rc != -1);
+
+    return sockfd;
+}
+
 void tcp_client_write (int sockfd, const void *buf, int buf_len)
 {
     assert (buf);
@@ -90,11 +127,75 @@ void tcp_client_read (int sockfd)
     assert (memcmp (buffer, test_str, strlen (test_str)) == 0);
 }
 
+size_t tcp_read (int s, char *buf, size_t bufsize)
+{
+    size_t bytes_read = 0;
+
+    struct pollfd pfd = {s, POLLIN};
+    int rc = poll (&pfd, 1, 100);
+
+    while (rc > 0 && bytes_read < bufsize) {
+        int n = read (s, buf + bytes_read, bufsize - bytes_read);
+        if (n <= 0)
+            return bytes_read;
+        bytes_read += n;
+        rc = poll (&pfd, 1, 100);
+    }
+
+    return bytes_read;
+}
+
 void tcp_client_close (int sockfd)
 {
     close (sockfd);
 }
 
+void test_zmq_connect ()
+{
+    void *ctx = zmq_init (1);
+    assert (ctx);
+
+    void *zs = zmq_socket (ctx, ZMQ_ROUTER);
+    assert (zs);
+
+    int rc = zmq_setsockopt (zs, ZMQ_IDENTITY, "X", 1);
+    assert (rc == 0);
+
+    int raw_sock = 1;
+    rc = zmq_setsockopt (zs, ZMQ_ROUTER_RAW, &raw_sock, sizeof raw_sock);
+    assert (rc == 0);
+
+    rc = zmq_connect (zs, "tcp://127.0.0.1:5555");
+    assert (rc == 0);
+
+    int i;
+    for (i = 0; i < 8; i++) {
+        int server_fd = tcp_server ();
+        assert (server_fd != -1);
+
+        zmq_msg_t msg;
+        rc = zmq_msg_init_size (&msg, strlen (test_str));
+        assert (rc == 0);
+        memcpy (zmq_msg_data (&msg), test_str, strlen (test_str));
+        rc = zmq_msg_send (&msg, zs, 0);
+
+        char buffer [128];
+        size_t bytes_read = tcp_read (server_fd, buffer, sizeof buffer);
+
+        assert (bytes_read == strlen (test_str)
+             || memcmp (buffer, test_str, bytes_read) == 0);
+
+        rc = close (server_fd);
+        assert (rc == 0);
+    }
+
+    rc = zmq_close (zs);
+    assert (rc == 0);
+
+    rc = zmq_term (ctx);
+    assert (rc == 0);
+}
+
 int main ()
 {
     fprintf (stderr, "test_raw_sock running...\n");
@@ -148,6 +249,8 @@ int main ()
     zmq_close (sb);
     zmq_term (ctx);
 
+    test_zmq_connect ();
+
     fprintf (stderr, "test_raw_sock PASSED.\n");
 
     return 0;