2 Unix SMB/CIFS implementation.
4 nbt list of addresses name resolution module
6 Copyright (C) Andrew Tridgell 2005
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
24 TODO: we should lower the timeout, and add retries for each name
28 #include "libcli/raw/libcliraw.h"
29 #include "libcli/nbt/libnbt.h"
30 #include "libcli/composite/composite.h"
32 struct nbtlist_state {
34 struct nbt_name_socket *nbtsock;
36 struct nbt_name_request **queries;
37 struct nbt_name_query *io_queries;
38 const char *reply_addr;
42 handle events during nbtlist name resolution
44 static void nbtlist_handler(struct nbt_name_request *req)
46 struct composite_context *c = talloc_get_type(req->async.private,
47 struct composite_context);
48 struct nbtlist_state *state = talloc_get_type(c->private_data, struct nbtlist_state);
51 for (i=0;i<state->num_queries;i++) {
52 if (req == state->queries[i]) break;
54 if (i == state->num_queries) {
56 c->status = NT_STATUS_INTERNAL_ERROR;
57 c->state = COMPOSITE_STATE_ERROR;
61 c->status = nbt_name_query_recv(req, state, &state->io_queries[i]);
62 if (!NT_STATUS_IS_OK(c->status)) {
63 c->state = COMPOSITE_STATE_ERROR;
65 if (state->io_queries[i].out.num_addrs < 1) {
66 c->state = COMPOSITE_STATE_ERROR;
67 c->status = NT_STATUS_UNEXPECTED_NETWORK_ERROR;
69 struct nbt_name_query *q = &state->io_queries[i];
70 c->state = COMPOSITE_STATE_DONE;
71 /* favor a local address if possible */
72 state->reply_addr = NULL;
73 for (i=0;i<q->out.num_addrs;i++) {
74 if (iface_is_local(q->out.reply_addrs[i])) {
75 state->reply_addr = talloc_steal(state,
76 q->out.reply_addrs[i]);
80 if (state->reply_addr == NULL) {
81 state->reply_addr = talloc_steal(state,
82 q->out.reply_addrs[0]);
88 talloc_free(state->nbtsock);
95 nbtlist name resolution method - async send
97 struct composite_context *resolve_name_nbtlist_send(struct nbt_name *name,
98 struct event_context *event_ctx,
99 const char **address_list,
103 struct composite_context *c;
104 struct nbtlist_state *state;
108 c = talloc_zero(NULL, struct composite_context);
109 if (c == NULL) goto failed;
111 state = talloc(c, struct nbtlist_state);
112 if (state == NULL) goto failed;
114 status = nbt_name_dup(state, name, &state->name);
115 if (!NT_STATUS_IS_OK(status)) goto failed;
117 state->name.name = strupper_talloc(state, state->name.name);
118 if (state->name.name == NULL) goto failed;
119 if (state->name.scope) {
120 state->name.scope = strupper_talloc(state, state->name.scope);
121 if (state->name.scope == NULL) goto failed;
124 state->nbtsock = nbt_name_socket_init(state, event_ctx);
125 if (state->nbtsock == NULL) goto failed;
127 /* count the address_list size */
128 for (i=0;address_list[i];i++) /* noop */ ;
130 state->num_queries = i;
131 state->io_queries = talloc_array(state, struct nbt_name_query, state->num_queries);
132 if (!state->io_queries) goto failed;
134 state->queries = talloc_array(state, struct nbt_name_request *, state->num_queries);
135 if (!state->queries) goto failed;
137 for (i=0;i<state->num_queries;i++) {
138 state->io_queries[i].in.name = state->name;
139 state->io_queries[i].in.dest_addr = talloc_strdup(state->io_queries, address_list[i]);
140 if (!state->io_queries[i].in.dest_addr) goto failed;
141 state->io_queries[i].in.broadcast = broadcast;
142 state->io_queries[i].in.wins_lookup = wins_lookup;
143 state->io_queries[i].in.timeout = lp_parm_int(-1, "nbt", "timeout", 1);
145 state->io_queries[i].in.retries = 2;
146 state->queries[i] = nbt_name_query_send(state->nbtsock, &state->io_queries[i]);
147 if (!state->queries[i]) goto failed;
149 state->queries[i]->async.fn = nbtlist_handler;
150 state->queries[i]->async.private = c;
153 c->state = COMPOSITE_STATE_IN_PROGRESS;
154 c->private_data = state;
155 c->event_ctx = talloc_reference(c, state->nbtsock->event_ctx);
165 nbt list of addresses name resolution method - recv side
167 NTSTATUS resolve_name_nbtlist_recv(struct composite_context *c,
168 TALLOC_CTX *mem_ctx, const char **reply_addr)
172 status = composite_wait(c);
174 if (NT_STATUS_IS_OK(status)) {
175 struct nbtlist_state *state = talloc_get_type(c->private_data, struct nbtlist_state);
176 *reply_addr = talloc_steal(mem_ctx, state->reply_addr);
184 nbt list of addresses name resolution method - sync call
186 NTSTATUS resolve_name_nbtlist(struct nbt_name *name,
188 const char **address_list,
189 BOOL broadcast, BOOL wins_lookup,
190 const char **reply_addr)
192 struct composite_context *c = resolve_name_nbtlist_send(name, NULL, address_list,
193 broadcast, wins_lookup);
194 return resolve_name_nbtlist_recv(c, mem_ctx, reply_addr);