Make struct tevent_req opaque
[kai/samba-autobuild/.git] / source3 / rpc_client / rpc_transport_sock.c
1 /*
2  *  Unix SMB/CIFS implementation.
3  *  RPC client transport over a socket
4  *  Copyright (C) Volker Lendecke 2009
5  *
6  *  This program is free software; you can redistribute it and/or modify
7  *  it under the terms of the GNU General Public License as published by
8  *  the Free Software Foundation; either version 3 of the License, or
9  *  (at your option) any later version.
10  *
11  *  This program is distributed in the hope that it will be useful,
12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  *  GNU General Public License for more details.
15  *
16  *  You should have received a copy of the GNU General Public License
17  *  along with this program; if not, see <http://www.gnu.org/licenses/>.
18  */
19
20 #include "includes.h"
21
22 #undef DBGC_CLASS
23 #define DBGC_CLASS DBGC_RPC_CLI
24
25 struct rpc_transport_sock_state {
26         int fd;
27 };
28
29 static int rpc_transport_sock_state_destructor(struct rpc_transport_sock_state *s)
30 {
31         if (s->fd != -1) {
32                 close(s->fd);
33                 s->fd = -1;
34         }
35         return 0;
36 }
37
38 struct rpc_sock_read_state {
39         ssize_t received;
40 };
41
42 static void rpc_sock_read_done(struct tevent_req *subreq);
43
44 static struct async_req *rpc_sock_read_send(TALLOC_CTX *mem_ctx,
45                                             struct event_context *ev,
46                                             uint8_t *data, size_t size,
47                                             void *priv)
48 {
49         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
50                 priv, struct rpc_transport_sock_state);
51         struct async_req *result;
52         struct tevent_req *subreq;
53         struct rpc_sock_read_state *state;
54
55         if (!async_req_setup(mem_ctx, &result, &state,
56                              struct rpc_sock_read_state)) {
57                 return NULL;
58         }
59
60         subreq = async_recv_send(state, ev, sock_transp->fd, data, size, 0);
61         if (subreq == NULL) {
62                 goto fail;
63         }
64         tevent_req_set_callback(subreq, rpc_sock_read_done, result);
65         return result;
66  fail:
67         TALLOC_FREE(result);
68         return NULL;
69 }
70
71 static void rpc_sock_read_done(struct tevent_req *subreq)
72 {
73         struct async_req *req =
74                 tevent_req_callback_data(subreq, struct async_req);
75         struct rpc_sock_read_state *state = talloc_get_type_abort(
76                 req->private_data, struct rpc_sock_read_state);
77         int err;
78
79         state->received = async_recv_recv(subreq, &err);
80         if (state->received == -1) {
81                 async_req_nterror(req, map_nt_error_from_unix(err));
82                 return;
83         }
84         async_req_done(req);
85 }
86
87 static NTSTATUS rpc_sock_read_recv(struct async_req *req, ssize_t *preceived)
88 {
89         struct rpc_sock_read_state *state = talloc_get_type_abort(
90                 req->private_data, struct rpc_sock_read_state);
91         NTSTATUS status;
92
93         if (async_req_is_nterror(req, &status)) {
94                 return status;
95         }
96         *preceived = state->received;
97         return NT_STATUS_OK;
98 }
99
100 struct rpc_sock_write_state {
101         ssize_t sent;
102 };
103
104 static void rpc_sock_write_done(struct tevent_req *subreq);
105
106 static struct async_req *rpc_sock_write_send(TALLOC_CTX *mem_ctx,
107                                              struct event_context *ev,
108                                              const uint8_t *data, size_t size,
109                                              void *priv)
110 {
111         struct rpc_transport_sock_state *sock_transp = talloc_get_type_abort(
112                 priv, struct rpc_transport_sock_state);
113         struct async_req *result;
114         struct tevent_req *subreq;
115         struct rpc_sock_write_state *state;
116
117         if (!async_req_setup(mem_ctx, &result, &state,
118                              struct rpc_sock_write_state)) {
119                 return NULL;
120         }
121         subreq = async_send_send(state, ev, sock_transp->fd, data, size, 0);
122         if (subreq == NULL) {
123                 goto fail;
124         }
125         tevent_req_set_callback(subreq, rpc_sock_write_done, result);
126         return result;
127  fail:
128         TALLOC_FREE(result);
129         return NULL;
130 }
131
132 static void rpc_sock_write_done(struct tevent_req *subreq)
133 {
134         struct async_req *req =
135                 tevent_req_callback_data(subreq, struct async_req);
136         struct rpc_sock_write_state *state = talloc_get_type_abort(
137                 req->private_data, struct rpc_sock_write_state);
138         int err;
139
140         state->sent = async_send_recv(subreq, &err);
141         if (state->sent == -1) {
142                 async_req_nterror(req, map_nt_error_from_unix(err));
143                 return;
144         }
145         async_req_done(req);
146 }
147
148 static NTSTATUS rpc_sock_write_recv(struct async_req *req, ssize_t *psent)
149 {
150         struct rpc_sock_write_state *state = talloc_get_type_abort(
151                 req->private_data, struct rpc_sock_write_state);
152         NTSTATUS status;
153
154         if (async_req_is_nterror(req, &status)) {
155                 return status;
156         }
157         *psent = state->sent;
158         return NT_STATUS_OK;
159 }
160
161 NTSTATUS rpc_transport_sock_init(TALLOC_CTX *mem_ctx, int fd,
162                                  struct rpc_cli_transport **presult)
163 {
164         struct rpc_cli_transport *result;
165         struct rpc_transport_sock_state *state;
166
167         result = talloc(mem_ctx, struct rpc_cli_transport);
168         if (result == NULL) {
169                 return NT_STATUS_NO_MEMORY;
170         }
171         state = talloc(result, struct rpc_transport_sock_state);
172         if (state == NULL) {
173                 TALLOC_FREE(result);
174                 return NT_STATUS_NO_MEMORY;
175         }
176         result->priv = state;
177
178         state->fd = fd;
179         talloc_set_destructor(state, rpc_transport_sock_state_destructor);
180
181         result->trans_send = NULL;
182         result->trans_recv = NULL;
183         result->write_send = rpc_sock_write_send;
184         result->write_recv = rpc_sock_write_recv;
185         result->read_send = rpc_sock_read_send;
186         result->read_recv = rpc_sock_read_recv;
187
188         *presult = result;
189         return NT_STATUS_OK;
190 }