general name resolution interface
Copyright (C) Andrew Tridgell 2005
+ Copyright (C) Jelmer Vernooij 2007
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
+ the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "lib/events/events.h"
-#include "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
+#include "libcli/resolve/resolve.h"
+#include "librpc/gen_ndr/ndr_nbt.h"
+#include "param/param.h"
+#include "system/network.h"
+#include "util/dlinklist.h"
struct resolve_state {
+ struct resolve_context *ctx;
+ struct resolve_method *method;
struct nbt_name name;
- const char **methods;
struct composite_context *creq;
const char *reply_addr;
};
static struct composite_context *setup_next_method(struct composite_context *c);
-/* pointers to the resolver backends */
-static const struct resolve_method {
- const char *name;
- struct composite_context *(*send_fn)(struct nbt_name *, struct event_context *);
- NTSTATUS (*recv_fn)(struct composite_context *, TALLOC_CTX *, const char **);
-} resolve_methods[] = {
- { "bcast", resolve_name_bcast_send, resolve_name_bcast_recv },
- { "wins", resolve_name_wins_send, resolve_name_wins_recv },
- { "host", resolve_name_host_send, resolve_name_host_recv }
+struct resolve_context {
+ struct resolve_method {
+ resolve_name_send_fn send_fn;
+ resolve_name_recv_fn recv_fn;
+ void *privdata;
+ struct resolve_method *prev, *next;
+ } *methods;
};
+/**
+ * Initialize a resolve context
+ */
+struct resolve_context *resolve_context_init(TALLOC_CTX *mem_ctx)
+{
+ return talloc_zero(mem_ctx, struct resolve_context);
+}
-/*
- find a matching backend
-*/
-static const struct resolve_method *find_method(const char *name)
+/**
+ * Add a resolve method
+ */
+bool resolve_context_add_method(struct resolve_context *ctx, resolve_name_send_fn send_fn,
+ resolve_name_recv_fn recv_fn, void *userdata)
{
- int i;
- if (name == NULL) return NULL;
- for (i=0;i<ARRAY_SIZE(resolve_methods);i++) {
- if (strcasecmp(name, resolve_methods[i].name) == 0) {
- return &resolve_methods[i];
- }
- }
- return NULL;
+ struct resolve_method *method = talloc_zero(ctx, struct resolve_method);
+
+ if (method == NULL)
+ return false;
+
+ method->send_fn = send_fn;
+ method->recv_fn = recv_fn;
+ method->privdata = userdata;
+ DLIST_ADD_END(ctx->methods, method, struct resolve_method *);
+ return true;
}
-/*
+/**
handle completion of one name resolve method
*/
static void resolve_handler(struct composite_context *creq)
{
- struct composite_context *c = creq->async.private_data;
+ struct composite_context *c = (struct composite_context *)creq->async.private_data;
struct resolve_state *state = talloc_get_type(c->private_data, struct resolve_state);
- const struct resolve_method *method = find_method(state->methods[0]);
+ const struct resolve_method *method = state->method;
c->status = method->recv_fn(creq, state, &state->reply_addr);
if (!NT_STATUS_IS_OK(c->status)) {
- state->methods++;
+ state->method = state->method->next;
state->creq = setup_next_method(c);
if (state->creq != NULL) {
return;
struct composite_context *creq = NULL;
do {
- const struct resolve_method *method = find_method(state->methods[0]);
- if (method) {
- creq = method->send_fn(&state->name, c->event_ctx);
+ if (state->method) {
+ creq = state->method->send_fn(c, c->event_ctx, state->method->privdata, &state->name);
}
- if (creq == NULL && state->methods[0]) state->methods++;
+ if (creq == NULL && state->method) state->method = state->method->next;
- } while (!creq && state->methods[0]);
+ } while (!creq && state->method);
if (creq) {
creq->async.fn = resolve_handler;
/*
general name resolution - async send
*/
-struct composite_context *resolve_name_send(struct nbt_name *name, struct event_context *event_ctx,
- const char **methods)
+struct composite_context *resolve_name_send(struct resolve_context *ctx,
+ struct nbt_name *name,
+ struct event_context *event_ctx)
{
struct composite_context *c;
struct resolve_state *state;
- NTSTATUS status;
- c = talloc_zero(NULL, struct composite_context);
- if (c == NULL) goto failed;
+ c = composite_create(event_ctx, event_ctx);
+ if (c == NULL) return NULL;
- state = talloc(c, struct resolve_state);
- if (state == NULL) goto failed;
-
- status = nbt_name_dup(state, name, &state->name);
- if (!NT_STATUS_IS_OK(status)) goto failed;
-
- if (methods == NULL) goto failed;
- state->methods = str_list_copy(state, methods);
- if (state->methods == NULL) goto failed;
-
- c->state = COMPOSITE_STATE_IN_PROGRESS;
- c->private_data = state;
+ if (ctx == NULL) {
+ composite_error(c, NT_STATUS_INVALID_PARAMETER);
+ return c;
+ }
if (event_ctx == NULL) {
c->event_ctx = event_context_init(c);
- if (c->event_ctx == NULL) goto failed;
-
} else {
c->event_ctx = talloc_reference(c, event_ctx);
}
+ if (composite_nomem(c->event_ctx, c)) return c;
+
+ state = talloc(c, struct resolve_state);
+ if (composite_nomem(state, c)) return c;
+ c->private_data = state;
+
+ c->status = nbt_name_dup(state, name, &state->name);
+ if (!composite_is_ok(c)) return c;
+
+ state->ctx = talloc_reference(state, ctx);
+ if (composite_nomem(state->ctx, c)) return c;
if (is_ipaddress(state->name.name) ||
strcasecmp(state->name.name, "localhost") == 0) {
- struct ipv4_addr ip = interpret_addr2(state->name.name);
- state->reply_addr = talloc_strdup(state, sys_inet_ntoa(ip));
- if (!state->reply_addr) goto failed;
+ struct in_addr ip = interpret_addr2(state->name.name);
+ state->reply_addr = talloc_strdup(state, inet_ntoa(ip));
+ if (composite_nomem(state->reply_addr, c)) return c;
composite_done(c);
return c;
}
+ state->method = ctx->methods;
state->creq = setup_next_method(c);
- if (state->creq == NULL) goto failed;
+ if (composite_nomem(state->creq, c)) return c;
return c;
-
-failed:
- talloc_free(c);
- return NULL;
}
/*
/*
general name resolution - sync call
*/
-NTSTATUS resolve_name(struct nbt_name *name, TALLOC_CTX *mem_ctx, const char **reply_addr,
- struct event_context *ev)
+NTSTATUS resolve_name(struct resolve_context *ctx, struct nbt_name *name, TALLOC_CTX *mem_ctx, const char **reply_addr, struct event_context *ev)
{
- struct composite_context *c = resolve_name_send(name, ev, lp_name_resolve_order());
+ struct composite_context *c = resolve_name_send(ctx, name, ev);
return resolve_name_recv(c, mem_ctx, reply_addr);
}
{
make_nbt_name(nbt, name, NBT_NAME_SERVER);
}
+
+struct resolve_context *lp_resolve_context(struct loadparm_context *lp_ctx)
+{
+ const char **methods = lp_name_resolve_order(lp_ctx);
+ int i;
+ struct resolve_context *ret = resolve_context_init(lp_ctx);
+
+ if (ret == NULL)
+ return NULL;
+
+ for (i = 0; methods != NULL && methods[i] != NULL; i++) {
+ if (!strcmp(methods[i], "wins")) {
+ resolve_context_add_wins_method(ret, lp_wins_server_list(lp_ctx));
+ } else if (!strcmp(methods[i], "bcast")) {
+ resolve_context_add_bcast_method(ret);
+ } else if (!strcmp(methods[i], "host")) {
+ resolve_context_add_host_method(ret);
+ } else {
+ DEBUG(0, ("Unknown resolve method '%s'", methods[i]));
+ }
+ }
+
+ return ret;
+}
git.samba.org / samba-svnmirror.git / blobdiff