a19898efaee9ea4ad45111dfe413dcaf79aebdff
[gd/samba-autobuild/.git] / source4 / libcli / smb_composite / fetchfile.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    Copyright (C) Volker Lendecke 2005
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   a composite API for loading a whole file into memory
21 */
22
23 #include "includes.h"
24 #include "libcli/composite/composite.h"
25 #include "libcli/smb_composite/smb_composite.h"
26 #include "libcli/resolve/resolve.h"
27
28 enum fetchfile_stage {FETCHFILE_CONNECT,
29                       FETCHFILE_READ};
30
31 struct fetchfile_state {
32         enum fetchfile_stage stage;
33         struct smb_composite_fetchfile *io;
34         struct composite_context *creq;
35         struct smb_composite_connect *connect;
36         struct smb_composite_loadfile *loadfile;
37 };
38
39 static void fetchfile_composite_handler(struct composite_context *req);
40
41 static NTSTATUS fetchfile_connect(struct composite_context *c,
42                                   struct smb_composite_fetchfile *io)
43 {
44         NTSTATUS status;
45         struct fetchfile_state *state;
46         state = talloc_get_type(c->private_data, struct fetchfile_state);
47
48         status = smb_composite_connect_recv(state->creq, c);
49         NT_STATUS_NOT_OK_RETURN(status);
50
51         state->loadfile = talloc(state, struct smb_composite_loadfile);
52         NT_STATUS_HAVE_NO_MEMORY(state->loadfile);
53
54         state->loadfile->in.fname = io->in.filename;
55
56         state->creq = smb_composite_loadfile_send(state->connect->out.tree,
57                                                  state->loadfile);
58         NT_STATUS_HAVE_NO_MEMORY(state->creq);
59
60         state->creq->async.private_data = c;
61         state->creq->async.fn = fetchfile_composite_handler;
62
63         state->stage = FETCHFILE_READ;
64
65         return NT_STATUS_OK;
66 }
67
68 static NTSTATUS fetchfile_read(struct composite_context *c,
69                                struct smb_composite_fetchfile *io)
70 {
71         NTSTATUS status;
72         struct fetchfile_state *state;
73         state = talloc_get_type(c->private_data, struct fetchfile_state);
74
75         status = smb_composite_loadfile_recv(state->creq, NULL);
76         NT_STATUS_NOT_OK_RETURN(status);
77
78         io->out.data = state->loadfile->out.data;
79         io->out.size = state->loadfile->out.size;
80
81         c->state = COMPOSITE_STATE_DONE;
82         if (c->async.fn)
83                 c->async.fn(c);
84
85         return NT_STATUS_OK;
86 }
87
88 static void fetchfile_state_handler(struct composite_context *c)
89 {
90         struct fetchfile_state *state;
91         NTSTATUS status = NT_STATUS_UNSUCCESSFUL;
92         
93         state = talloc_get_type(c->private_data, struct fetchfile_state);
94
95         /* when this handler is called, the stage indicates what
96            call has just finished */
97         switch (state->stage) {
98         case FETCHFILE_CONNECT:
99                 status = fetchfile_connect(c, state->io);
100                 break;
101         case FETCHFILE_READ:
102                 status = fetchfile_read(c, state->io);
103                 break;
104         }
105
106         if (!NT_STATUS_IS_OK(status)) {
107                 c->status = status;
108                 c->state = COMPOSITE_STATE_ERROR;
109                 if (c->async.fn) {
110                         c->async.fn(c);
111                 }
112         }
113 }
114
115 static void fetchfile_composite_handler(struct composite_context *creq)
116 {
117         struct composite_context *c = talloc_get_type(creq->async.private_data, 
118                                                       struct composite_context);
119         fetchfile_state_handler(c);
120 }
121
122 struct composite_context *smb_composite_fetchfile_send(struct smb_composite_fetchfile *io,
123                                                        struct event_context *event_ctx)
124 {
125         struct composite_context *c;
126         struct fetchfile_state *state;
127
128         c = talloc_zero(NULL, struct composite_context);
129         if (c == NULL) goto failed;
130
131         state = talloc(c, struct fetchfile_state);
132         if (state == NULL) goto failed;
133
134         state->connect = talloc(state, struct smb_composite_connect);
135         if (state->connect == NULL) goto failed;
136
137         state->io = io;
138
139         state->connect->in.dest_host    = io->in.dest_host;
140         state->connect->in.dest_ports   = io->in.ports;
141         state->connect->in.socket_options = io->in.socket_options;
142         state->connect->in.called_name  = io->in.called_name;
143         state->connect->in.service      = io->in.service;
144         state->connect->in.service_type = io->in.service_type;
145         state->connect->in.credentials  = io->in.credentials;
146         state->connect->in.fallback_to_anonymous = false;
147         state->connect->in.workgroup    = io->in.workgroup;
148         state->connect->in.gensec_settings = io->in.gensec_settings;
149         state->connect->in.iconv_convenience = io->in.iconv_convenience;
150
151         state->connect->in.options      = io->in.options;
152         state->connect->in.session_options = io->in.session_options;
153
154         state->creq = smb_composite_connect_send(state->connect, state, 
155                                                  io->in.resolve_ctx, event_ctx);
156         if (state->creq == NULL) goto failed;
157
158         state->creq->async.private_data = c;
159         state->creq->async.fn = fetchfile_composite_handler;
160
161         c->state = COMPOSITE_STATE_IN_PROGRESS;
162         state->stage = FETCHFILE_CONNECT;
163         c->private_data = state;
164
165         return c;
166  failed:
167         talloc_free(c);
168         return NULL;
169 }
170
171 NTSTATUS smb_composite_fetchfile_recv(struct composite_context *c,
172                                       TALLOC_CTX *mem_ctx)
173 {
174         NTSTATUS status;
175
176         status = composite_wait(c);
177
178         if (NT_STATUS_IS_OK(status)) {
179                 struct fetchfile_state *state = talloc_get_type(c->private_data, struct fetchfile_state);
180                 talloc_steal(mem_ctx, state->io->out.data);
181         }
182
183         talloc_free(c);
184         return status;
185 }
186
187 NTSTATUS smb_composite_fetchfile(struct smb_composite_fetchfile *io,
188                                  TALLOC_CTX *mem_ctx)
189 {
190         struct composite_context *c = smb_composite_fetchfile_send(io, NULL);
191         return smb_composite_fetchfile_recv(c, mem_ctx);
192 }