mirror of
https://github.com/samba-team/samba.git
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b3d491b210
- fixed ncacn_ip_tcp to use the generic async name resolution methods, so NBT names now work (as requested several times by abartlet!) - changed resolve_name() to take an event_context, so it doesn't cause the whole process to block - cleaned up the talloc_find_parent_bytype() calls to go via a cleaner event_context_find() call
112 lines
3.1 KiB
C
112 lines
3.1 KiB
C
/*
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Unix SMB/CIFS implementation.
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implements a non-blocking connect operation that is aware of the samba4 events
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system
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Copyright (C) Andrew Tridgell 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include "includes.h"
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#include "lib/socket/socket.h"
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#include "lib/events/events.h"
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#include "librpc/gen_ndr/nbt.h"
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/*
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async name resolution handler for socket_connect_ev, returnes either
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an IP address or 'localhost' (which is specially recognised)
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*/
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static NTSTATUS connect_resolve(TALLOC_CTX *mem_ctx, const char *address,
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struct event_context *ev, const char **ret_address)
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{
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struct nbt_name name;
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if (is_ipaddress(address) || strcasecmp("localhost", address) == 0) {
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*ret_address = address;
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return NT_STATUS_OK;
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}
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name.name = address;
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name.scope = NULL;
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name.type = NBT_NAME_CLIENT;
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return resolve_name(&name, mem_ctx, ret_address, ev);
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}
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/*
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handle write events on connect completion
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*/
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static void socket_connect_handler(struct event_context *ev, struct fd_event *fde,
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uint16_t flags, void *private)
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{
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NTSTATUS *status = (NTSTATUS *)private;
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*status = NT_STATUS_OK;
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}
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/*
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just like socket_connect() but other events can happen while the
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connect is ongoing. This isn't as good as making the calling code
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fully async during its connect phase, but at least it means that any
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calling code that uses this won't interfere with code that is
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properly async
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*/
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NTSTATUS socket_connect_ev(struct socket_context *sock,
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const char *my_address, int my_port,
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const char *server_address, int server_port,
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uint32_t flags, struct event_context *ev)
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{
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TALLOC_CTX *tmp_ctx = talloc_new(sock);
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NTSTATUS status;
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/*
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we resolve separately to ensure that the name resolutions happens
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asynchronously
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*/
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status = connect_resolve(tmp_ctx, server_address, ev, &server_address);
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if (!NT_STATUS_IS_OK(status)) {
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talloc_free(tmp_ctx);
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return status;
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}
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set_blocking(socket_get_fd(sock), False);
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status = socket_connect(sock, my_address, my_port,
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server_address, server_port, flags);
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if (NT_STATUS_IS_ERR(status) &&
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!NT_STATUS_EQUAL(status, NT_STATUS_MORE_PROCESSING_REQUIRED)) {
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return status;
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}
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event_add_fd(ev, tmp_ctx, socket_get_fd(sock), EVENT_FD_WRITE,
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socket_connect_handler, &status);
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while (NT_STATUS_EQUAL(status, STATUS_MORE_ENTRIES)) {
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if (event_loop_once(ev) != 0) {
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talloc_free(tmp_ctx);
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return NT_STATUS_INTERNAL_ERROR;
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}
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}
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status = socket_connect_complete(sock, flags);
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talloc_free(tmp_ctx);
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return status;
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}
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