poll: Added a cleanup function to free the ws2_32 library.

include/libssh/poll.h

@@ -77,6 +77,7 @@ typedef unsigned long int nfds_t;
 #endif /* HAVE_POLL */
 
 void ssh_poll_init(void);
+void ssh_poll_cleanup(void);
 int ssh_poll(ssh_pollfd_t *fds, nfds_t nfds, int timeout);
 typedef struct ssh_poll_ctx_struct *ssh_poll_ctx;
 typedef struct ssh_poll_handle_struct *ssh_poll_handle;

include/libssh/socket.h

@@ -30,6 +30,7 @@ struct ssh_socket_struct;
 typedef struct ssh_socket_struct* ssh_socket;
 
 int ssh_socket_init(void);
+void ssh_socket_cleanup(void);
 ssh_socket ssh_socket_new(ssh_session session);
 void ssh_socket_free(ssh_socket s);
 void ssh_socket_set_fd(ssh_socket s, socket_t fd);

libssh/init.c

@@ -72,6 +72,7 @@ int ssh_finalize(void) {
 	ssh_free_global_poll_ctx();
   ssh_regex_finalize();
   ssh_crypto_finalize();
+  ssh_socket_cleanup();
 #ifdef HAVE_LIBGCRYPT
   gcry_control(GCRYCTL_TERM_SECMEM);
 #elif defined HAVE_LIBCRYPTO

libssh/poll.c

@@ -67,6 +67,10 @@ void ssh_poll_init(void) {
     return;
 }
 
+void ssh_poll_cleanup(void) {
+    return;
+}
+
 int ssh_poll(ssh_pollfd_t *fds, nfds_t nfds, int timeout) {
   return poll((struct pollfd *) fds, nfds, timeout);
 }
@@ -217,6 +221,14 @@ void ssh_poll_init(void) {
     }
 }
 
+void ssh_poll_cleanup(void) {
+    win_poll = bsd_poll;
+
+    FreeLibrary(hlib);
+
+    hlib = NULL;
+}
+
 int ssh_poll(ssh_pollfd_t *fds, nfds_t nfds, int timeout) {
     return win_poll(fds, nfds, timeout);
 }

libssh/socket.c

@@ -111,10 +111,20 @@ int ssh_socket_init(void) {
     return -1;
   }
 
-  ssh_poll_init();
 #endif
+  ssh_poll_init();
+
   return 0;
 }
+
+/**
+ * @brief Cleanup the socket system.
+ */
+void ssh_socket_cleanup(void) {
+    ssh_poll_cleanup();
+}
+
+
 /**
  * \internal
  * \brief creates a new Socket object