2 Unix SMB/CIFS implementation.
4 implements a non-blocking connect operation that is aware of the samba4
7 Copyright (C) Andrew Tridgell 2005
8 Copyright (C) Volker Lendecke 2005
10 This program is free software; you can redistribute it and/or modify
11 it under the terms of the GNU General Public License as published by
12 the Free Software Foundation; either version 3 of the License, or
13 (at your option) any later version.
15 This program is distributed in the hope that it will be useful,
16 but WITHOUT ANY WARRANTY; without even the implied warranty of
17 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 GNU General Public License for more details.
20 You should have received a copy of the GNU General Public License
21 along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include "lib/socket/socket.h"
26 #include "lib/events/events.h"
27 #include "libcli/composite/composite.h"
28 #include "libcli/resolve/resolve.h"
31 struct connect_state {
32 struct socket_context *sock;
33 const struct socket_address *my_address;
34 const struct socket_address *server_address;
38 static void socket_connect_handler(struct event_context *ev,
40 uint16_t flags, void *private);
41 static void continue_resolve_name(struct composite_context *ctx);
42 static void continue_socket_connect(struct composite_context *creq);
45 call the real socket_connect() call, and setup event handler
47 static void socket_send_connect(struct composite_context *result)
49 struct composite_context *creq;
51 struct connect_state *state = talloc_get_type(result->private_data,
52 struct connect_state);
54 creq = talloc_zero(state, struct composite_context);
55 if (composite_nomem(creq, result)) return;
56 creq->state = COMPOSITE_STATE_IN_PROGRESS;
57 creq->event_ctx = result->event_ctx;
58 creq->async.fn = continue_socket_connect;
59 creq->async.private_data = result;
61 result->status = socket_connect(state->sock,
63 state->server_address,
65 if (NT_STATUS_IS_ERR(result->status) &&
66 !NT_STATUS_EQUAL(result->status,
67 NT_STATUS_MORE_PROCESSING_REQUIRED)) {
68 composite_error(result, result->status);
72 fde = event_add_fd(result->event_ctx, result,
73 socket_get_fd(state->sock),
74 EVENT_FD_READ|EVENT_FD_WRITE,
75 socket_connect_handler, result);
76 composite_nomem(fde, result);
81 send a socket connect, potentially doing some name resolution first
83 struct composite_context *socket_connect_send(struct socket_context *sock,
84 struct socket_address *my_address,
85 struct socket_address *server_address,
87 struct event_context *event_ctx)
89 struct composite_context *result;
90 struct connect_state *state;
92 result = talloc_zero(sock, struct composite_context);
93 if (result == NULL) return NULL;
94 result->state = COMPOSITE_STATE_IN_PROGRESS;
95 result->event_ctx = event_ctx;
97 state = talloc_zero(result, struct connect_state);
98 if (composite_nomem(state, result)) return result;
99 result->private_data = state;
101 state->sock = talloc_reference(state, sock);
102 if (composite_nomem(state->sock, result)) return result;
105 void *ref = talloc_reference(state, my_address);
106 if (composite_nomem(ref, result)) {
109 state->my_address = my_address;
113 void *ref = talloc_reference(state, server_address);
114 if (composite_nomem(ref, result)) {
117 state->server_address = server_address;
120 state->flags = flags;
122 set_blocking(socket_get_fd(sock), False);
124 if (server_address->addr && strcmp(sock->backend_name, "ipv4") == 0) {
125 struct nbt_name name;
126 struct composite_context *creq;
127 make_nbt_name_client(&name, server_address->addr);
128 creq = resolve_name_send(&name, result->event_ctx,
129 lp_name_resolve_order());
130 if (composite_nomem(creq, result)) return result;
131 composite_continue(result, creq, continue_resolve_name, result);
135 socket_send_connect(result);
141 handle write events on connect completion
143 static void socket_connect_handler(struct event_context *ev,
144 struct fd_event *fde,
145 uint16_t flags, void *private)
147 struct composite_context *result =
148 talloc_get_type(private, struct composite_context);
149 struct connect_state *state = talloc_get_type(result->private_data,
150 struct connect_state);
152 result->status = socket_connect_complete(state->sock, state->flags);
153 if (!composite_is_ok(result)) return;
155 composite_done(result);
159 recv name resolution reply then send the connect
161 static void continue_resolve_name(struct composite_context *creq)
163 struct composite_context *result = talloc_get_type(creq->async.private_data,
164 struct composite_context);
165 struct connect_state *state = talloc_get_type(result->private_data, struct connect_state);
168 result->status = resolve_name_recv(creq, state, &addr);
169 if (!composite_is_ok(result)) return;
171 state->server_address = socket_address_from_strings(state, state->sock->backend_name,
172 addr, state->server_address->port);
173 if (composite_nomem(state->server_address, result)) return;
175 socket_send_connect(result);
179 called when a connect has finished. Complete the top level composite context
181 static void continue_socket_connect(struct composite_context *creq)
183 struct composite_context *result = talloc_get_type(creq->async.private_data,
184 struct composite_context);
185 result->status = creq->status;
186 if (!composite_is_ok(result)) return;
187 composite_done(result);
192 wait for a socket_connect_send() to finish
194 NTSTATUS socket_connect_recv(struct composite_context *result)
196 NTSTATUS status = composite_wait(result);
203 like socket_connect() but takes an event context, doing a semi-async connect
205 NTSTATUS socket_connect_ev(struct socket_context *sock,
206 struct socket_address *my_address,
207 struct socket_address *server_address,
208 uint32_t flags, struct event_context *ev)
210 struct composite_context *ctx;
211 ctx = socket_connect_send(sock, my_address,
212 server_address, flags, ev);
213 return socket_connect_recv(ctx);