Remove more event_context_init() uses from function calls within deep down the code.
[bbaumbach/samba-autobuild/.git] / source4 / libcli / raw / clisocket.c
1 /* 
2    Unix SMB/CIFS implementation.
3
4    SMB client socket context management functions
5
6    Copyright (C) Andrew Tridgell 1994-2005
7    Copyright (C) James Myers 2003 <myersjj@samba.org>
8    
9    This program is free software; you can redistribute it and/or modify
10    it under the terms of the GNU General Public License as published by
11    the Free Software Foundation; either version 3 of the License, or
12    (at your option) any later version.
13    
14    This program is distributed in the hope that it will be useful,
15    but WITHOUT ANY WARRANTY; without even the implied warranty of
16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17    GNU General Public License for more details.
18    
19    You should have received a copy of the GNU General Public License
20    along with this program.  If not, see <http://www.gnu.org/licenses/>.
21 */
22
23 #include "includes.h"
24 #include "lib/events/events.h"
25 #include "libcli/raw/libcliraw.h"
26 #include "libcli/composite/composite.h"
27 #include "lib/socket/socket.h"
28 #include "libcli/resolve/resolve.h"
29 #include "param/param.h"
30
31 struct sock_connect_state {
32         struct composite_context *ctx;
33         const char *host_name;
34         int num_ports;
35         uint16_t *ports;
36         const char *socket_options;
37         struct smbcli_socket *result;
38 };
39
40 /*
41   connect a smbcli_socket context to an IP/port pair
42   if port is 0 then choose 445 then 139
43 */
44
45 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx);
46
47 struct composite_context *smbcli_sock_connect_send(TALLOC_CTX *mem_ctx,
48                                                    const char *host_addr,
49                                                    const char **ports,
50                                                    const char *host_name,
51                                                    struct resolve_context *resolve_ctx,
52                                                    struct event_context *event_ctx)
53 {
54         struct composite_context *result, *ctx;
55         struct sock_connect_state *state;
56         int i;
57
58         result = talloc_zero(mem_ctx, struct composite_context);
59         if (result == NULL) goto failed;
60         result->state = COMPOSITE_STATE_IN_PROGRESS;
61
62         result->event_ctx = talloc_reference(result, event_ctx);
63         if (result->event_ctx == NULL) goto failed;
64
65         state = talloc(result, struct sock_connect_state);
66         if (state == NULL) goto failed;
67         state->ctx = result;
68         result->private_data = state;
69
70         state->host_name = talloc_strdup(state, host_name);
71         if (state->host_name == NULL) goto failed;
72
73         state->num_ports = str_list_length(ports);
74         state->ports = talloc_array(state, uint16_t, state->num_ports);
75         if (state->ports == NULL) goto failed;
76         for (i=0;ports[i];i++) {
77                 state->ports[i] = atoi(ports[i]);
78         }
79         state->socket_options = lp_socket_options(global_loadparm);
80
81         ctx = socket_connect_multi_send(state, host_addr,
82                                         state->num_ports, state->ports,
83                                         resolve_ctx,
84                                         state->ctx->event_ctx);
85         if (ctx == NULL) goto failed;
86         ctx->async.fn = smbcli_sock_connect_recv_conn;
87         ctx->async.private_data = state;
88         return result;
89
90 failed:
91         talloc_free(result);
92         return NULL;
93 }
94
95 static void smbcli_sock_connect_recv_conn(struct composite_context *ctx)
96 {
97         struct sock_connect_state *state =
98                 talloc_get_type(ctx->async.private_data,
99                                 struct sock_connect_state);
100         struct socket_context *sock;
101         uint16_t port;
102
103         state->ctx->status = socket_connect_multi_recv(ctx, state, &sock,
104                                                        &port);
105         if (!composite_is_ok(state->ctx)) return;
106
107         state->ctx->status =
108                 socket_set_option(sock, state->socket_options, NULL);
109         if (!composite_is_ok(state->ctx)) return;
110
111
112         state->result = talloc_zero(state, struct smbcli_socket);
113         if (composite_nomem(state->result, state->ctx)) return;
114
115         state->result->sock = talloc_steal(state->result, sock);
116         state->result->port = port;
117         state->result->hostname = talloc_steal(sock, state->host_name);
118
119         state->result->event.ctx =
120                 talloc_reference(state->result, state->ctx->event_ctx);
121         if (composite_nomem(state->result->event.ctx, state->ctx)) return;
122
123         composite_done(state->ctx);
124 }
125
126 /*
127   finish a smbcli_sock_connect_send() operation
128 */
129 NTSTATUS smbcli_sock_connect_recv(struct composite_context *c,
130                                   TALLOC_CTX *mem_ctx,
131                                   struct smbcli_socket **result)
132 {
133         NTSTATUS status = composite_wait(c);
134         if (NT_STATUS_IS_OK(status)) {
135                 struct sock_connect_state *state =
136                         talloc_get_type(c->private_data,
137                                         struct sock_connect_state);
138                 *result = talloc_steal(mem_ctx, state->result);
139         }
140         talloc_free(c);
141         return status;
142 }
143
144 /*
145   connect a smbcli_socket context to an IP/port pair
146   if port is 0 then choose the ports listed in smb.conf (normally 445 then 139)
147
148   sync version of the function
149 */
150 NTSTATUS smbcli_sock_connect(TALLOC_CTX *mem_ctx,
151                              const char *host_addr, const char **ports,
152                              const char *host_name,
153                              struct resolve_context *resolve_ctx,
154                              struct event_context *event_ctx,
155                              struct smbcli_socket **result)
156 {
157         struct composite_context *c =
158                 smbcli_sock_connect_send(mem_ctx, host_addr, ports, host_name,
159                                          resolve_ctx,
160                                          event_ctx);
161         return smbcli_sock_connect_recv(c, mem_ctx, result);
162 }
163
164
165 /****************************************************************************
166  mark the socket as dead
167 ****************************************************************************/
168 _PUBLIC_ void smbcli_sock_dead(struct smbcli_socket *sock)
169 {
170         talloc_free(sock->event.fde);
171         sock->event.fde = NULL;
172         talloc_free(sock->sock);
173         sock->sock = NULL;
174 }
175
176 /****************************************************************************
177  Set socket options on a open connection.
178 ****************************************************************************/
179 void smbcli_sock_set_options(struct smbcli_socket *sock, const char *options)
180 {
181         socket_set_option(sock->sock, options, NULL);
182 }
183
184 /****************************************************************************
185 resolve a hostname and connect 
186 ****************************************************************************/
187 _PUBLIC_ struct smbcli_socket *smbcli_sock_connect_byname(const char *host, const char **ports,
188                                                  TALLOC_CTX *mem_ctx,
189                                                  struct resolve_context *resolve_ctx,
190                                                  struct event_context *event_ctx)
191 {
192         int name_type = NBT_NAME_SERVER;
193         const char *address;
194         NTSTATUS status;
195         struct nbt_name nbt_name;
196         char *name, *p;
197         TALLOC_CTX *tmp_ctx = talloc_new(mem_ctx);
198         struct smbcli_socket *result;
199
200         if (event_ctx == NULL) {
201                 DEBUG(0, ("Invalid NULL event context passed in as parameter\n"));
202                 return NULL;
203         }
204
205         if (tmp_ctx == NULL) {
206                 DEBUG(0, ("talloc_new failed\n"));
207                 return NULL;
208         }
209
210         name = talloc_strdup(tmp_ctx, host);
211         if (name == NULL) {
212                 DEBUG(0, ("talloc_strdup failed\n"));
213                 talloc_free(tmp_ctx);
214                 return NULL;
215         }
216
217         /* allow hostnames of the form NAME#xx and do a netbios lookup */
218         if ((p = strchr(name, '#'))) {
219                 name_type = strtol(p+1, NULL, 16);
220                 *p = 0;
221         }
222
223         make_nbt_name(&nbt_name, host, name_type);
224         
225         status = resolve_name(resolve_ctx, &nbt_name, tmp_ctx, &address, event_ctx);
226         if (!NT_STATUS_IS_OK(status)) {
227                 talloc_free(tmp_ctx);
228                 return NULL;
229         }
230
231         status = smbcli_sock_connect(mem_ctx, address, ports, name, resolve_ctx,
232                                      event_ctx, &result);
233
234         if (!NT_STATUS_IS_OK(status)) {
235                 DEBUG(9, ("smbcli_sock_connect failed: %s\n",
236                           nt_errstr(status)));
237                 talloc_free(tmp_ctx);
238                 return NULL;
239         }
240
241         talloc_free(tmp_ctx);
242
243         return result;
244 }