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DEFINITIONS
This source file includes following definitions.
- socket_send_connect
- socket_connect_send
- socket_connect_handler
- socket_connect_recv
- socket_connect_ev
1 /*
2 Unix SMB/CIFS implementation.
3
4 implements a non-blocking connect operation that is aware of the samba4
5 events system
6
7 Copyright (C) Andrew Tridgell 2005
8 Copyright (C) Volker Lendecke 2005
9
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.
14
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.
19
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/>.
22 */
23
24 #include "includes.h"
25 #include "lib/socket/socket.h"
26 #include "lib/events/events.h"
27 #include "libcli/composite/composite.h"
28
29
30 struct connect_state {
31 struct socket_context *sock;
32 const struct socket_address *my_address;
33 const struct socket_address *server_address;
34 uint32_t flags;
35 };
36
37 static void socket_connect_handler(struct tevent_context *ev,
38 struct tevent_fd *fde,
39 uint16_t flags, void *private_data);
40
41 /*
42 call the real socket_connect() call, and setup event handler
43 */
44 static void socket_send_connect(struct composite_context *result)
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45 {
46 struct tevent_fd *fde;
47 struct connect_state *state = talloc_get_type(result->private_data,
48 struct connect_state);
49
50 result->status = socket_connect(state->sock,
51 state->my_address,
52 state->server_address,
53 state->flags);
54 if (NT_STATUS_IS_ERR(result->status) &&
55 !NT_STATUS_EQUAL(result->status,
56 NT_STATUS_MORE_PROCESSING_REQUIRED)) {
57 composite_error(result, result->status);
58 return;
59 }
60
61 fde = event_add_fd(result->event_ctx, result,
62 socket_get_fd(state->sock),
63 EVENT_FD_READ|EVENT_FD_WRITE,
64 socket_connect_handler, result);
65 composite_nomem(fde, result);
66 }
67
68
69 /*
70 send a socket connect, potentially doing some name resolution first
71 */
72 struct composite_context *socket_connect_send(struct socket_context *sock,
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73 struct socket_address *my_address,
74 struct socket_address *server_address,
75 uint32_t flags,
76 struct tevent_context *event_ctx)
77 {
78 struct composite_context *result;
79 struct connect_state *state;
80
81 result = composite_create(sock, event_ctx);
82 if (result == NULL) return NULL;
83
84 state = talloc_zero(result, struct connect_state);
85 if (composite_nomem(state, result)) return result;
86 result->private_data = state;
87
88 state->sock = talloc_reference(state, sock);
89 if (composite_nomem(state->sock, result)) return result;
90
91 if (my_address) {
92 void *ref = talloc_reference(state, my_address);
93 if (composite_nomem(ref, result)) {
94 return result;
95 }
96 state->my_address = my_address;
97 }
98
99 {
100 void *ref = talloc_reference(state, server_address);
101 if (composite_nomem(ref, result)) {
102 return result;
103 }
104 state->server_address = server_address;
105 }
106
107 state->flags = flags;
108
109 set_blocking(socket_get_fd(sock), false);
110
111 socket_send_connect(result);
112
113 return result;
114 }
115
116 /*
117 handle write events on connect completion
118 */
119 static void socket_connect_handler(struct tevent_context *ev,
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120 struct tevent_fd *fde,
121 uint16_t flags, void *private_data)
122 {
123 struct composite_context *result =
124 talloc_get_type(private_data, struct composite_context);
125 struct connect_state *state = talloc_get_type(result->private_data,
126 struct connect_state);
127
128 result->status = socket_connect_complete(state->sock, state->flags);
129 if (!composite_is_ok(result)) return;
130
131 composite_done(result);
132 }
133
134 /*
135 wait for a socket_connect_send() to finish
136 */
137 NTSTATUS socket_connect_recv(struct composite_context *result)
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138 {
139 NTSTATUS status = composite_wait(result);
140 talloc_free(result);
141 return status;
142 }
143
144
145 /*
146 like socket_connect() but takes an event context, doing a semi-async connect
147 */
148 NTSTATUS socket_connect_ev(struct socket_context *sock,
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149 struct socket_address *my_address,
150 struct socket_address *server_address,
151 uint32_t flags,
152 struct tevent_context *ev)
153 {
154 struct composite_context *ctx;
155 ctx = socket_connect_send(sock, my_address,
156 server_address, flags, ev);
157 return socket_connect_recv(ctx);
158 }