Line data Source code
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 102744 : static void socket_send_connect(struct composite_context *result)
45 : {
46 2970 : struct tevent_fd *fde;
47 102744 : struct connect_state *state = talloc_get_type(result->private_data,
48 : struct connect_state);
49 :
50 102744 : result->status = socket_connect(state->sock,
51 : state->my_address,
52 : state->server_address,
53 : state->flags);
54 102744 : if (NT_STATUS_IS_ERR(result->status) &&
55 0 : !NT_STATUS_EQUAL(result->status,
56 : NT_STATUS_MORE_PROCESSING_REQUIRED)) {
57 0 : composite_error(result, result->status);
58 0 : return;
59 : }
60 :
61 102744 : fde = tevent_add_fd(result->event_ctx, result,
62 : socket_get_fd(state->sock),
63 : TEVENT_FD_READ|TEVENT_FD_WRITE,
64 : socket_connect_handler, result);
65 102744 : composite_nomem(fde, result);
66 : }
67 :
68 :
69 : /*
70 : send a socket connect, potentially doing some name resolution first
71 : */
72 102744 : struct composite_context *socket_connect_send(struct socket_context *sock,
73 : struct socket_address *my_address,
74 : struct socket_address *server_address,
75 : uint32_t flags,
76 : struct tevent_context *event_ctx)
77 : {
78 2970 : struct composite_context *result;
79 2970 : struct connect_state *state;
80 :
81 102744 : result = composite_create(sock, event_ctx);
82 102744 : if (result == NULL) return NULL;
83 :
84 102744 : state = talloc_zero(result, struct connect_state);
85 102744 : if (composite_nomem(state, result)) return result;
86 102744 : result->private_data = state;
87 :
88 102744 : state->sock = talloc_reference(state, sock);
89 102744 : if (composite_nomem(state->sock, result)) return result;
90 :
91 102744 : if (my_address) {
92 480 : void *ref = talloc_reference(state, my_address);
93 480 : if (composite_nomem(ref, result)) {
94 0 : return result;
95 : }
96 480 : state->my_address = my_address;
97 : }
98 :
99 : {
100 102744 : void *ref = talloc_reference(state, server_address);
101 102744 : if (composite_nomem(ref, result)) {
102 0 : return result;
103 : }
104 102744 : state->server_address = server_address;
105 : }
106 :
107 102744 : state->flags = flags;
108 :
109 102744 : set_blocking(socket_get_fd(sock), false);
110 :
111 102744 : socket_send_connect(result);
112 :
113 102744 : return result;
114 : }
115 :
116 : /*
117 : handle write events on connect completion
118 : */
119 545445 : static void socket_connect_handler(struct tevent_context *ev,
120 : struct tevent_fd *fde,
121 : uint16_t flags, void *private_data)
122 : {
123 2970 : struct composite_context *result =
124 545445 : talloc_get_type(private_data, struct composite_context);
125 545445 : struct connect_state *state = talloc_get_type(result->private_data,
126 : struct connect_state);
127 :
128 545445 : result->status = socket_connect_complete(state->sock, state->flags);
129 545445 : if (!composite_is_ok(result)) return;
130 :
131 545445 : composite_done(result);
132 : }
133 :
134 : /*
135 : wait for a socket_connect_send() to finish
136 : */
137 102671 : NTSTATUS socket_connect_recv(struct composite_context *result)
138 : {
139 102671 : NTSTATUS status = composite_wait(result);
140 102671 : talloc_free(result);
141 102671 : return status;
142 : }
143 :
144 :
145 : /*
146 : like socket_connect() but takes an event context, doing a semi-async connect
147 : */
148 47952 : NTSTATUS socket_connect_ev(struct socket_context *sock,
149 : struct socket_address *my_address,
150 : struct socket_address *server_address,
151 : uint32_t flags,
152 : struct tevent_context *ev)
153 : {
154 1756 : struct composite_context *ctx;
155 47952 : ctx = socket_connect_send(sock, my_address,
156 : server_address, flags, ev);
157 47952 : return socket_connect_recv(ctx);
158 : }
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