async_sock: Move to top level

1 files changed, 0 insertions, 693 deletions

diff --git a/source3/lib/async_sock.c b/source3/lib/async_sock.c
deleted file mode 100644
index 73ff6f2870..0000000000
--- a/source3/lib/async_sock.c
+++ /dev/null
@@ -1,693 +0,0 @@
-/*
-   Unix SMB/CIFS implementation.
-   async socket syscalls
-   Copyright (C) Volker Lendecke 2008
-
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 3 of the License, or
-   (at your option) any later version.
-
-   This program 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 General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.
-*/
-
-#include "includes.h"
-
-/**
- * Discriminator for async_syscall_state
- */
-enum async_syscall_type {
-	ASYNC_SYSCALL_SEND,
-	ASYNC_SYSCALL_SENDALL,
-	ASYNC_SYSCALL_RECV,
-	ASYNC_SYSCALL_RECVALL,
-	ASYNC_SYSCALL_CONNECT
-};
-
-/**
- * Holder for syscall arguments and the result
- */
-
-struct async_syscall_state {
-	enum async_syscall_type syscall_type;
-	struct fd_event *fde;
-
-	union {
-		struct param_send {
-			int fd;
-			const void *buffer;
-			size_t length;
-			int flags;
-		} param_send;
-		struct param_sendall {
-			int fd;
-			const void *buffer;
-			size_t length;
-			int flags;
-			size_t sent;
-		} param_sendall;
-		struct param_recv {
-			int fd;
-			void *buffer;
-			size_t length;
-			int flags;
-		} param_recv;
-		struct param_recvall {
-			int fd;
-			void *buffer;
-			size_t length;
-			int flags;
-			size_t received;
-		} param_recvall;
-		struct param_connect {
-			/**
-			 * connect needs to be done on a nonblocking
-			 * socket. Keep the old flags around
-			 */
-			long old_sockflags;
-			int fd;
-			const struct sockaddr *address;
-			socklen_t address_len;
-		} param_connect;
-	} param;
-
-	union {
-		ssize_t result_ssize_t;
-		size_t result_size_t;
-		int result_int;
-	} result;
-	int sys_errno;
-};
-
-/**
- * @brief Create a new async syscall req
- * @param[in] mem_ctx	The memory context to hang the result off
- * @param[in] ev	The event context to work from
- * @param[in] type	Which syscall will this be
- * @param[in] pstate	Where to put the newly created private_data state
- * @retval The new request
- *
- * This is a helper function to prepare a new struct async_req with an
- * associated struct async_syscall_state. The async_syscall_state will be put
- * into the async_req as private_data.
- */
-
-static struct async_req *async_syscall_new(TALLOC_CTX *mem_ctx,
-					   struct event_context *ev,
-					   enum async_syscall_type type,
-					   struct async_syscall_state **pstate)
-{
-	struct async_req *result;
-	struct async_syscall_state *state;
-
-	if (!async_req_setup(mem_ctx, &result, &state,
-			     struct async_syscall_state)) {
-		return NULL;
-	}
-	state->syscall_type = type;
-
-	result->private_data = state;
-
-	*pstate = state;
-
-	return result;
-}
-
-/**
- * @brief Create a new async syscall req based on a fd
- * @param[in] mem_ctx	The memory context to hang the result off
- * @param[in] ev	The event context to work from
- * @param[in] type	Which syscall will this be
- * @param[in] fd	The file descriptor we work on
- * @param[in] fde_flags EVENT_FD_READ/WRITE -- what are we interested in?
- * @param[in] fde_cb	The callback function for the file descriptor event
- * @param[in] pstate	Where to put the newly created private_data state
- * @retval The new request
- *
- * This is a helper function to prepare a new struct async_req with an
- * associated struct async_syscall_state and an associated file descriptor
- * event.
- */
-
-static struct async_req *async_fde_syscall_new(
-	TALLOC_CTX *mem_ctx,
-	struct event_context *ev,
-	enum async_syscall_type type,
-	int fd,
-	uint16_t fde_flags,
-	void (*fde_cb)(struct event_context *ev,
-		       struct fd_event *fde, uint16_t flags,
-		       void *priv),
-	struct async_syscall_state **pstate)
-{
-	struct async_req *result;
-	struct async_syscall_state *state;
-
-	result = async_syscall_new(mem_ctx, ev, type, &state);
-	if (result == NULL) {
-		return NULL;
-	}
-
-	state->fde = event_add_fd(ev, state, fd, fde_flags, fde_cb, result);
-	if (state->fde == NULL) {
-		TALLOC_FREE(result);
-		return NULL;
-	}
-	*pstate = state;
-	return result;
-}
-
-/**
- * Retrieve a ssize_t typed result from an async syscall
- * @param[in] req	The syscall that has just finished
- * @param[out] perrno	Where to put the syscall's errno
- * @retval The return value from the asynchronously called syscall
- */
-
-ssize_t async_syscall_result_ssize_t(struct async_req *req, int *perrno)
-{
-	struct async_syscall_state *state = talloc_get_type_abort(
-		req->private_data, struct async_syscall_state);
-
-	*perrno = state->sys_errno;
-	return state->result.result_ssize_t;
-}
-
-/**
- * Retrieve a size_t typed result from an async syscall
- * @param[in] req	The syscall that has just finished
- * @param[out] perrno	Where to put the syscall's errno
- * @retval The return value from the asynchronously called syscall
- */
-
-size_t async_syscall_result_size_t(struct async_req *req, int *perrno)
-{
-	struct async_syscall_state *state = talloc_get_type_abort(
-		req->private_data, struct async_syscall_state);
-
-	*perrno = state->sys_errno;
-	return state->result.result_size_t;
-}
-
-/**
- * Retrieve a int typed result from an async syscall
- * @param[in] req	The syscall that has just finished
- * @param[out] perrno	Where to put the syscall's errno
- * @retval The return value from the asynchronously called syscall
- */
-
-int async_syscall_result_int(struct async_req *req, int *perrno)
-{
-	struct async_syscall_state *state = talloc_get_type_abort(
-		req->private_data, struct async_syscall_state);
-
-	*perrno = state->sys_errno;
-	return state->result.result_int;
-}
-
-/**
- * fde event handler for the "send" syscall
- * @param[in] ev	The event context that sent us here
- * @param[in] fde	The file descriptor event associated with the send
- * @param[in] flags	Can only be EVENT_FD_WRITE here
- * @param[in] priv	private data, "struct async_req *" in this case
- */
-
-static void async_send_callback(struct event_context *ev,
-				struct fd_event *fde, uint16_t flags,
-				void *priv)
-{
-	struct async_req *req = talloc_get_type_abort(
-		priv, struct async_req);
-	struct async_syscall_state *state = talloc_get_type_abort(
-		req->private_data, struct async_syscall_state);
-	struct param_send *p = &state->param.param_send;
-
-	if (state->syscall_type != ASYNC_SYSCALL_SEND) {
-		async_req_error(req, NT_STATUS_INTERNAL_ERROR);
-		return;
-	}
-
-	state->result.result_ssize_t = send(p->fd, p->buffer, p->length,
-					    p->flags);
-	state->sys_errno = errno;
-
-	TALLOC_FREE(state->fde);
-
-	async_req_done(req);
-}
-
-/**
- * Async version of send(2)
- * @param[in] mem_ctx	The memory context to hang the result off
- * @param[in] ev	The event context to work from
- * @param[in] fd	The socket to send to
- * @param[in] buffer	The buffer to send
- * @param[in] length	How many bytes to send
- * @param[in] flags	flags passed to send(2)
- *
- * This function is a direct counterpart of send(2)
- */
-
-struct async_req *async_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
-			     int fd, const void *buffer, size_t length,
-			     int flags)
-{
-	struct async_req *result;
-	struct async_syscall_state *state;
-
-	result = async_fde_syscall_new(
-		mem_ctx, ev, ASYNC_SYSCALL_SEND,
-		fd, EVENT_FD_WRITE, async_send_callback,
-		&state);
-	if (result == NULL) {
-		return NULL;
-	}
-
-	state->param.param_send.fd = fd;
-	state->param.param_send.buffer = buffer;
-	state->param.param_send.length = length;
-	state->param.param_send.flags = flags;
-
-	return result;
-}
-
-/**
- * fde event handler for the "sendall" syscall group
- * @param[in] ev	The event context that sent us here
- * @param[in] fde	The file descriptor event associated with the send
- * @param[in] flags	Can only be EVENT_FD_WRITE here
- * @param[in] priv	private data, "struct async_req *" in this case
- */
-
-static void async_sendall_callback(struct event_context *ev,
-				   struct fd_event *fde, uint16_t flags,
-				   void *priv)
-{
-	struct async_req *req = talloc_get_type_abort(
-		priv, struct async_req);
-	struct async_syscall_state *state = talloc_get_type_abort(
-		req->private_data, struct async_syscall_state);
-	struct param_sendall *p = &state->param.param_sendall;
-
-	if (state->syscall_type != ASYNC_SYSCALL_SENDALL) {
-		async_req_error(req, NT_STATUS_INTERNAL_ERROR);
-		return;
-	}
-
-	state->result.result_ssize_t = send(p->fd, (char *)p->buffer + p->sent,
-					    p->length - p->sent, p->flags);
-	state->sys_errno = errno;
-
-	if (state->result.result_ssize_t == -1) {
-		async_req_error(req, map_nt_error_from_unix(state->sys_errno));
-		return;
-	}
-
-	if (state->result.result_ssize_t == 0) {
-		async_req_error(req, NT_STATUS_END_OF_FILE);
-		return;
-	}
-
-	p->sent += state->result.result_ssize_t;
-	if (p->sent > p->length) {
-		async_req_error(req, NT_STATUS_INTERNAL_ERROR);
-		return;
-	}
-
-	if (p->sent == p->length) {
-		TALLOC_FREE(state->fde);
-		async_req_done(req);
-	}
-}
-
-/**
- * @brief Send all bytes to a socket
- * @param[in] mem_ctx	The memory context to hang the result off
- * @param[in] ev	The event context to work from
- * @param[in] fd	The socket to send to
- * @param[in] buffer	The buffer to send
- * @param[in] length	How many bytes to send
- * @param[in] flags	flags passed to send(2)
- *
- * async_sendall calls send(2) as long as it is necessary to send all of the
- * "length" bytes
- */
-
-struct async_req *sendall_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
-			       int fd, const void *buffer, size_t length,
-			       int flags)
-{
-	struct async_req *result;
-	struct async_syscall_state *state;
-
-	result = async_fde_syscall_new(
-		mem_ctx, ev, ASYNC_SYSCALL_SENDALL,
-		fd, EVENT_FD_WRITE, async_sendall_callback,
-		&state);
-	if (result == NULL) {
-		return NULL;
-	}
-
-	state->param.param_sendall.fd = fd;
-	state->param.param_sendall.buffer = buffer;
-	state->param.param_sendall.length = length;
-	state->param.param_sendall.flags = flags;
-	state->param.param_sendall.sent = 0;
-
-	return result;
-}
-
-NTSTATUS sendall_recv(struct async_req *req)
-{
-	return async_req_simple_recv(req);
-}
-
-/**
- * fde event handler for the "recv" syscall
- * @param[in] ev	The event context that sent us here
- * @param[in] fde	The file descriptor event associated with the recv
- * @param[in] flags	Can only be EVENT_FD_READ here
- * @param[in] priv	private data, "struct async_req *" in this case
- */
-
-static void async_recv_callback(struct event_context *ev,
-				struct fd_event *fde, uint16_t flags,
-				void *priv)
-{
-	struct async_req *req = talloc_get_type_abort(
-		priv, struct async_req);
-	struct async_syscall_state *state = talloc_get_type_abort(
-		req->private_data, struct async_syscall_state);
-	struct param_recv *p = &state->param.param_recv;
-
-	if (state->syscall_type != ASYNC_SYSCALL_RECV) {
-		async_req_error(req, NT_STATUS_INTERNAL_ERROR);
-		return;
-	}
-
-	state->result.result_ssize_t = recv(p->fd, p->buffer, p->length,
-					    p->flags);
-	state->sys_errno = errno;
-
-	TALLOC_FREE(state->fde);
-
-	async_req_done(req);
-}
-
-/**
- * Async version of recv(2)
- * @param[in] mem_ctx	The memory context to hang the result off
- * @param[in] ev	The event context to work from
- * @param[in] fd	The socket to recv from
- * @param[in] buffer	The buffer to recv into
- * @param[in] length	How many bytes to recv
- * @param[in] flags	flags passed to recv(2)
- *
- * This function is a direct counterpart of recv(2)
- */
-
-struct async_req *async_recv(TALLOC_CTX *mem_ctx, struct event_context *ev,
-			     int fd, void *buffer, size_t length,
-			     int flags)
-{
-	struct async_req *result;
-	struct async_syscall_state *state;
-
-	result = async_fde_syscall_new(
-		mem_ctx, ev, ASYNC_SYSCALL_RECV,
-		fd, EVENT_FD_READ, async_recv_callback,
-		&state);
-
-	if (result == NULL) {
-		return NULL;
-	}
-
-	state->param.param_recv.fd = fd;
-	state->param.param_recv.buffer = buffer;
-	state->param.param_recv.length = length;
-	state->param.param_recv.flags = flags;
-
-	return result;
-}
-
-/**
- * fde event handler for the "recvall" syscall group
- * @param[in] ev	The event context that sent us here
- * @param[in] fde	The file descriptor event associated with the recv
- * @param[in] flags	Can only be EVENT_FD_READ here
- * @param[in] priv	private data, "struct async_req *" in this case
- */
-
-static void async_recvall_callback(struct event_context *ev,
-				   struct fd_event *fde, uint16_t flags,
-				   void *priv)
-{
-	struct async_req *req = talloc_get_type_abort(
-		priv, struct async_req);
-	struct async_syscall_state *state = talloc_get_type_abort(
-		req->private_data, struct async_syscall_state);
-	struct param_recvall *p = &state->param.param_recvall;
-
-	if (state->syscall_type != ASYNC_SYSCALL_RECVALL) {
-		async_req_error(req, NT_STATUS_INTERNAL_ERROR);
-		return;
-	}
-
-	state->result.result_ssize_t = recv(p->fd,
-					    (char *)p->buffer + p->received,
-					    p->length - p->received, p->flags);
-	state->sys_errno = errno;
-
-	if (state->result.result_ssize_t == -1) {
-		async_req_error(req, map_nt_error_from_unix(state->sys_errno));
-		return;
-	}
-
-	if (state->result.result_ssize_t == 0) {
-		async_req_error(req, NT_STATUS_END_OF_FILE);
-		return;
-	}
-
-	p->received += state->result.result_ssize_t;
-	if (p->received > p->length) {
-		async_req_error(req, NT_STATUS_INTERNAL_ERROR);
-		return;
-	}
-
-	if (p->received == p->length) {
-		TALLOC_FREE(state->fde);
-		async_req_done(req);
-	}
-}
-
-/**
- * Receive a specified number of bytes from a socket
- * @param[in] mem_ctx	The memory context to hang the result off
- * @param[in] ev	The event context to work from
- * @param[in] fd	The socket to recv from
- * @param[in] buffer	The buffer to recv into
- * @param[in] length	How many bytes to recv
- * @param[in] flags	flags passed to recv(2)
- *
- * async_recvall will call recv(2) until "length" bytes are received
- */
-
-struct async_req *recvall_send(TALLOC_CTX *mem_ctx, struct event_context *ev,
-			       int fd, void *buffer, size_t length,
-			       int flags)
-{
-	struct async_req *result;
-	struct async_syscall_state *state;
-
-	result = async_fde_syscall_new(
-		mem_ctx, ev, ASYNC_SYSCALL_RECVALL,
-		fd, EVENT_FD_READ, async_recvall_callback,
-		&state);
-	if (result == NULL) {
-		return NULL;
-	}
-
-	state->param.param_recvall.fd = fd;
-	state->param.param_recvall.buffer = buffer;
-	state->param.param_recvall.length = length;
-	state->param.param_recvall.flags = flags;
-	state->param.param_recvall.received = 0;
-
-	return result;
-}
-
-NTSTATUS recvall_recv(struct async_req *req)
-{
-	return async_req_simple_recv(req);
-}
-
-struct async_connect_state {
-	int fd;
-	int result;
-	int sys_errno;
-	long old_sockflags;
-};
-
-static void async_connect_connected(struct event_context *ev,
-				    struct fd_event *fde, uint16_t flags,
-				    void *priv);
-
-/**
- * @brief async version of connect(2)
- * @param[in] mem_ctx	The memory context to hang the result off
- * @param[in] ev	The event context to work from
- * @param[in] fd	The socket to recv from
- * @param[in] address	Where to connect?
- * @param[in] address_len Length of *address
- * @retval The async request
- *
- * This function sets the socket into non-blocking state to be able to call
- * connect in an async state. This will be reset when the request is finished.
- */
-
-struct async_req *async_connect_send(TALLOC_CTX *mem_ctx,
-				     struct event_context *ev,
-				     int fd, const struct sockaddr *address,
-				     socklen_t address_len)
-{
-	struct async_req *result;
-	struct async_connect_state *state;
-	struct fd_event *fde;
-	NTSTATUS status;
-
-	if (!async_req_setup(mem_ctx, &result, &state,
-			     struct async_connect_state)) {
-		return NULL;
-	}
-
-	/**
-	 * We have to set the socket to nonblocking for async connect(2). Keep
-	 * the old sockflags around.
-	 */
-
-	state->fd = fd;
-	state->sys_errno = 0;
-
-	state->old_sockflags = sys_fcntl_long(fd, F_GETFL, 0);
-	if (state->old_sockflags == -1) {
-		goto post_errno;
-	}
-
-	set_blocking(fd, false);
-
-	state->result = connect(fd, address, address_len);
-	if (state->result == 0) {
-		state->sys_errno = 0;
-		status = NT_STATUS_OK;
-		goto post_status;
-	}
-
-	/**
-	 * A number of error messages show that something good is progressing
-	 * and that we have to wait for readability.
-	 *
-	 * If none of them are present, bail out.
-	 */
-
-	if (!(errno == EINPROGRESS || errno == EALREADY ||
-#ifdef EISCONN
-	      errno == EISCONN ||
-#endif
-	      errno == EAGAIN || errno == EINTR)) {
-		goto post_errno;
-	}
-
-	fde = event_add_fd(ev, state, fd, EVENT_FD_READ | EVENT_FD_WRITE,
-			   async_connect_connected, result);
-	if (fde == NULL) {
-		status = NT_STATUS_NO_MEMORY;
-		goto post_status;
-	}
-	return result;
-
- post_errno:
-	state->sys_errno = errno;
-	status = map_nt_error_from_unix(state->sys_errno);
- post_status:
-	sys_fcntl_long(fd, F_SETFL, state->old_sockflags);
-	if (!async_post_status(result, ev, status)) {
-		goto fail;
-	}
-	return result;
- fail:
-	TALLOC_FREE(result);
-	return NULL;
-}
-
-/**
- * fde event handler for connect(2)
- * @param[in] ev	The event context that sent us here
- * @param[in] fde	The file descriptor event associated with the connect
- * @param[in] flags	Indicate read/writeability of the socket
- * @param[in] priv	private data, "struct async_req *" in this case
- */
-
-static void async_connect_connected(struct event_context *ev,
-				    struct fd_event *fde, uint16_t flags,
-				    void *priv)
-{
-	struct async_req *req = talloc_get_type_abort(
-		priv, struct async_req);
-	struct async_connect_state *state = talloc_get_type_abort(
-		req->private_data, struct async_connect_state);
-
-	TALLOC_FREE(fde);
-
-	/*
-	 * Stevens, Network Programming says that if there's a
-	 * successful connect, the socket is only writable. Upon an
-	 * error, it's both readable and writable.
-	 */
-	if ((flags & (EVENT_FD_READ|EVENT_FD_WRITE))
-	    == (EVENT_FD_READ|EVENT_FD_WRITE)) {
-		int sockerr;
-		socklen_t err_len = sizeof(sockerr);
-
-		if (getsockopt(state->fd, SOL_SOCKET, SO_ERROR,
-			       (void *)&sockerr, &err_len) == 0) {
-			errno = sockerr;
-		}
-
-		state->sys_errno = errno;
-
-		DEBUG(10, ("connect returned %s\n", strerror(errno)));
-
-		sys_fcntl_long(state->fd, F_SETFL, state->old_sockflags);
-		async_req_error(req, map_nt_error_from_unix(state->sys_errno));
-		return;
-	}
-
-	state->sys_errno = 0;
-	async_req_done(req);
-}
-
-NTSTATUS async_connect_recv(struct async_req *req, int *perrno)
-{
-	struct async_connect_state *state = talloc_get_type_abort(
-		req->private_data, struct async_connect_state);
-	NTSTATUS status;
-
-	sys_fcntl_long(state->fd, F_SETFL, state->old_sockflags);
-
-	*perrno = state->sys_errno;
-
-	if (async_req_is_error(req, &status)) {
-		return status;
-	}
-	if (state->sys_errno == 0) {
-		return NT_STATUS_OK;
-	}
-	return map_nt_error_from_unix(state->sys_errno);
-}