Bump the libuv requirement to libuv >= 1.34.0

By bumping the minimum libuv version to 1.34.0, it allows us to remove
all libuv shims we ever had and makes the code much cleaner.  The
up-to-date libuv is available in all distributions supported by BIND
9.19+ either natively or as a backport.

configure.ac

@@ -552,8 +552,8 @@ AC_CHECK_HEADERS([pthread_np.h], [], [], [#include <pthread.h>])
 
 # libuv
 AC_MSG_CHECKING([for libuv])
-PKG_CHECK_MODULES([LIBUV], [libuv >= 1.0.0], [],
-		  [AC_MSG_ERROR([libuv not found])])
+PKG_CHECK_MODULES([LIBUV], [libuv >= 1.34.0], [],
+		  [AC_MSG_ERROR([libuv >= 1.34.0 not found])])
 
 AX_SAVE_FLAGS([libuv])
 CFLAGS="$CFLAGS $LIBUV_CFLAGS"

doc/arm/build.inc.rst

@@ -60,7 +60,7 @@ To build BIND 9, the following packages must be installed:
 - ``perl``
 - ``pkg-config`` / ``pkgconfig`` / ``pkgconf``
 
-BIND 9.19 requires ``libuv`` 1.x or higher. On older systems, an updated
+BIND 9.19 requires ``libuv`` 1.34.0 or higher. On older systems, an updated
 ``libuv`` package needs to be installed from sources such as EPEL, PPA,
 or other native sources. The other option is to build and install
 ``libuv`` from source.

doc/arm/platforms.inc.rst

@@ -107,7 +107,7 @@ These are platforms on which current versions of BIND 9 are known *not* to build
 -  Platforms that do not support atomic operations (via compiler or
    library)
 -  Linux without NPTL (Native POSIX Thread Library)
--  Platforms on which **libuv** cannot be compiled
+-  Platforms on which **libuv >= 1.34** cannot be compiled or is not available
 
 Installing BIND 9
 -----------------

lib/isc/include/isc/uv.h

@@ -19,11 +19,6 @@
 #include <isc/result.h>
 #include <isc/tid.h>
 
-/*
- * These functions were introduced in newer libuv, but we still
- * want BIND9 compile on older ones so we emulate them.
- */
-
 #define UV_VERSION(major, minor, patch) ((major << 16) | (minor << 8) | (patch))
 
 /*
@@ -47,58 +42,6 @@
 #define UV__ERR(x) (-(x))
 #endif
 
-#if UV_VERSION_HEX < UV_VERSION(1, 12, 0)
-int
-uv_os_getenv(const char *name, char *buffer, size_t *size);
-
-#define uv_os_setenv(name, value) setenv(name, value, 0)
-#endif /* UV_VERSION_HEX < UV_VERSION(1, 12, 0) */
-
-#if UV_VERSION_HEX < UV_VERSION(1, 19, 0)
-static inline void *
-uv_handle_get_data(const uv_handle_t *handle) {
-	return (handle->data);
-}
-
-static inline void
-uv_handle_set_data(uv_handle_t *handle, void *data) {
-	handle->data = data;
-}
-
-static inline void *
-uv_req_get_data(const uv_req_t *req) {
-	return (req->data);
-}
-
-static inline void
-uv_req_set_data(uv_req_t *req, void *data) {
-	req->data = data;
-}
-#endif /* UV_VERSION_HEX < UV_VERSION(1, 19, 0) */
-
-#if UV_VERSION_HEX < UV_VERSION(1, 32, 0)
-int
-uv_tcp_close_reset(uv_tcp_t *handle, uv_close_cb close_cb);
-#endif
-
-#if UV_VERSION_HEX < UV_VERSION(1, 34, 0)
-#define uv_sleep(msec) usleep(msec * 1000)
-#endif /* UV_VERSION_HEX < UV_VERSION(1, 34, 0) */
-
-#if UV_VERSION_HEX < UV_VERSION(1, 27, 0)
-int
-isc_uv_udp_connect(uv_udp_t *handle, const struct sockaddr *addr);
-/*%<
- * Associate the UDP handle to a remote address and port, so every message sent
- * by this handle is automatically sent to that destination.
- *
- * NOTE: This is just a limited shim for uv_udp_connect() as it requires the
- * handle to be bound.
- */
-#else /* UV_VERSION_HEX < UV_VERSION(1, 27, 0) */
-#define isc_uv_udp_connect uv_udp_connect
-#endif /* UV_VERSION_HEX < UV_VERSION(1, 27, 0) */
-
 /*
  * These are used with all versions of libuv:
  */

lib/isc/netmgr/udp.c

@@ -725,17 +725,14 @@ isc__nm_udp_send(isc_nmhandle_t *handle, const isc_region_t *region,
 	uvreq->cb.send = cb;
 	uvreq->cbarg = cbarg;
 
-#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
 	/*
-	 * If we used uv_udp_connect() (and not the shim version for
-	 * older versions of libuv), then the peer address has to be
+	 * We used uv_udp_connect(), so the peer address has to be
 	 * set to NULL or else uv_udp_send() could fail or assert,
 	 * depending on the libuv version.
 	 */
 	if (atomic_load(&sock->connected)) {
 		sa = NULL;
 	}
-#endif
 
 	r = uv_udp_send(&uvreq->uv_req.udp_send, &sock->uv_handle.udp,
 			&uvreq->uvbuf, 1, sa, udp_send_cb);
@@ -790,8 +787,7 @@ udp_connect_direct(isc_nmsocket_t *sock, isc__nm_uvreq_t *req) {
 	 * giving up.
 	 */
 	do {
-		r = isc_uv_udp_connect(&sock->uv_handle.udp,
-				       &req->peer.type.sa);
+		r = uv_udp_connect(&sock->uv_handle.udp, &req->peer.type.sa);
 	} while (r == UV_EADDRINUSE && --req->connect_tries > 0);
 	if (r != 0) {
 		isc__nm_incstats(sock, STATID_CONNECTFAIL);

lib/isc/uv.c

@@ -16,75 +16,6 @@
 #include <isc/util.h>
 #include <isc/uv.h>
 
-#if UV_VERSION_HEX < UV_VERSION(1, 12, 0)
-#include <stdlib.h>
-#include <string.h>
-
-int
-uv_os_getenv(const char *name, char *buffer, size_t *size) {
-	size_t len;
-	char *buf = getenv(name);
-	if (buf == NULL) {
-		return (UV_ENOENT);
-	}
-	len = strlen(buf) + 1;
-	if (len > *size) {
-		*size = len;
-		return (UV_ENOBUFS);
-	}
-	*size = len;
-	memmove(buffer, buf, len);
-	return (0);
-}
-
-#endif
-
-#if UV_VERSION_HEX < UV_VERSION(1, 27, 0)
-int
-isc_uv_udp_connect(uv_udp_t *handle, const struct sockaddr *addr) {
-	int err = 0;
-
-	do {
-		int addrlen = (addr->sa_family == AF_INET)
-				      ? sizeof(struct sockaddr_in)
-				      : sizeof(struct sockaddr_in6);
-		err = connect(handle->io_watcher.fd, addr, addrlen);
-	} while (err == -1 && errno == EINTR);
-
-	if (err) {
-#if UV_VERSION_HEX >= UV_VERSION(1, 10, 0)
-		return (uv_translate_sys_error(errno));
-#else
-		return (-errno);
-#endif /* UV_VERSION_HEX >= UV_VERSION(1, 10, 0) */
-	}
-
-	return (0);
-}
-#endif /* UV_VERSION_HEX < UV_VERSION(1, 27, 0) */
-
-#if UV_VERSION_HEX < UV_VERSION(1, 32, 0)
-int
-uv_tcp_close_reset(uv_tcp_t *handle, uv_close_cb close_cb) {
-	if (setsockopt(handle->io_watcher.fd, SOL_SOCKET, SO_LINGER,
-		       &(struct linger){ 1, 0 }, sizeof(struct linger)) == -1)
-	{
-#if UV_VERSION_HEX >= UV_VERSION(1, 10, 0)
-		return (uv_translate_sys_error(errno));
-#else
-		return (-errno);
-#endif /* UV_VERSION_HEX >= UV_VERSION(1, 10, 0) */
-	}
-
-	INSIST(!uv_is_closing((uv_handle_t *)handle));
-	uv_close((uv_handle_t *)handle, close_cb);
-	return (0);
-}
-#endif /* UV_VERSION_HEX < UV_VERSION(1, 32, 0) */
-
-#define setsockopt_on(socket, level, name) \
-	setsockopt(socket, level, name, &(int){ 1 }, sizeof(int))
-
 /*%
  * Convert a libuv error value into an isc_result_t.  The
  * list of supported error values is not complete; new users

tests/isc/udp_test.c

@@ -228,7 +228,6 @@ ISC_LOOP_TEST_IMPL(mock_udpconnect_uv_udp_bind) {
 	RESET_RETURN;
 }
 
-#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
 ISC_LOOP_TEST_IMPL(mock_udpconnect_uv_udp_connect) {
 	WILL_RETURN(uv_udp_connect, UV_ENOMEM);
 
@@ -240,8 +239,6 @@ ISC_LOOP_TEST_IMPL(mock_udpconnect_uv_udp_connect) {
 	RESET_RETURN;
 }
 
-#endif
-
 ISC_LOOP_TEST_IMPL(mock_udpconnect_uv_recv_buffer_size) {
 	WILL_RETURN(uv_recv_buffer_size, UV_ENOMEM);
 
@@ -1133,9 +1130,7 @@ ISC_TEST_ENTRY_CUSTOM(mock_listenudp_uv_udp_recv_start, setup_test,
 		      teardown_test)
 ISC_TEST_ENTRY_CUSTOM(mock_udpconnect_uv_udp_open, setup_test, teardown_test)
 ISC_TEST_ENTRY_CUSTOM(mock_udpconnect_uv_udp_bind, setup_test, teardown_test)
-#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
 ISC_TEST_ENTRY_CUSTOM(mock_udpconnect_uv_udp_connect, setup_test, teardown_test)
-#endif
 ISC_TEST_ENTRY_CUSTOM(mock_udpconnect_uv_recv_buffer_size, setup_test,
 		      teardown_test)
 ISC_TEST_ENTRY_CUSTOM(mock_udpconnect_uv_send_buffer_size, setup_test,

tests/isc/uv_wrap.h

@@ -38,13 +38,11 @@ __wrap_uv_udp_open(uv_udp_t *handle, uv_os_sock_t sock);
 int
 __wrap_uv_udp_bind(uv_udp_t *handle, const struct sockaddr *addr,
 		   unsigned int flags);
-#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
 int
 __wrap_uv_udp_connect(uv_udp_t *handle, const struct sockaddr *addr);
 int
 __wrap_uv_udp_getpeername(const uv_udp_t *handle, struct sockaddr *name,
 			  int *namelen);
-#endif /* UV_VERSION_HEX >= UV_VERSION(1, 27, 0) */
 int
 __wrap_uv_udp_getsockname(const uv_udp_t *handle, struct sockaddr *name,
 			  int *namelen);
@@ -118,7 +116,6 @@ __wrap_uv_udp_bind(uv_udp_t *handle, const struct sockaddr *addr,
 
 static atomic_int __state_uv_udp_connect __attribute__((unused)) = 0;
 
-#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
 int
 __wrap_uv_udp_connect(uv_udp_t *handle, const struct sockaddr *addr) {
 	if (atomic_load(&__state_uv_udp_connect) == 0) {
@@ -126,11 +123,9 @@ __wrap_uv_udp_connect(uv_udp_t *handle, const struct sockaddr *addr) {
 	}
 	return (atomic_load(&__state_uv_udp_connect));
 }
-#endif /* UV_VERSION_HEX >= UV_VERSION(1, 27, 0) */
 
 static atomic_int __state_uv_udp_getpeername __attribute__((unused)) = 0;
 
-#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
 int
 __wrap_uv_udp_getpeername(const uv_udp_t *handle, struct sockaddr *name,
 			  int *namelen) {
@@ -139,7 +134,6 @@ __wrap_uv_udp_getpeername(const uv_udp_t *handle, struct sockaddr *name,
 	}
 	return (atomic_load(&__state_uv_udp_getpeername));
 }
-#endif /* UV_VERSION_HEX >= UV_VERSION(1, 27, 0) */
 
 static atomic_int __state_uv_udp_getsockname = 0;
 int
@@ -277,10 +271,8 @@ __wrap_uv_fileno(const uv_handle_t *handle, uv_os_fd_t *fd) {
 
 #define uv_udp_open(...)	__wrap_uv_udp_open(__VA_ARGS__)
 #define uv_udp_bind(...)	__wrap_uv_udp_bind(__VA_ARGS__)
-#if UV_VERSION_HEX >= UV_VERSION(1, 27, 0)
 #define uv_udp_connect(...)	__wrap_uv_udp_connect(__VA_ARGS__)
 #define uv_udp_getpeername(...) __wrap_uv_udp_getpeername(__VA_ARGS__)
-#endif /* UV_VERSION_HEX >= UV_VERSION(1, 27, 0) */
 #define uv_udp_getsockname(...) __wrap_uv_udp_getsockname(__VA_ARGS__)
 #define uv_udp_send(...)	__wrap_uv_udp_send(__VA_ARGS__)
 #define uv_udp_recv_start(...)	__wrap_uv_udp_recv_start(__VA_ARGS__)