s4-resolve: Add lmhosts support into the source4 name resolve code

Signed-off-by: Andrew Bartlett <abartlet@samba.org>
Reviewed-by: Michael Adam <obnox@samba.org>

source4/libcli/resolve/lmhosts.c

@@ -0,0 +1,129 @@
+/*
+   Unix SMB/CIFS implementation.
+
+   broadcast name resolution module
+
+   Copyright (C) Andrew Tridgell 1994-1998,2005
+   Copyright (C) Jeremy Allison 2007
+   Copyright (C) Jelmer Vernooij 2007
+   Copyright (C) Andrew Bartlett <abartlet@samba.org> 2009-2014
+   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 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   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, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "includes.h"
+#include "libcli/composite/composite.h"
+#include "libcli/resolve/resolve.h"
+#include "lib/socket/socket.h"
+#include "system/network.h"
+#include "lib/socket/netif.h"
+#include "param/param.h"
+#include "lib/util/util_net.h"
+#include "libcli/nbt/libnbt.h"
+#include "dynconfig.h"
+
+struct resolve_lmhosts_state {
+	struct socket_address **addrs;
+	char **names;
+};
+
+/**
+  broadcast name resolution method - async send
+ */
+/*
+  general name resolution - async send
+ */
+struct composite_context *resolve_name_lmhosts_send(TALLOC_CTX *mem_ctx,
+						  struct tevent_context *event_ctx,
+						  void *userdata, uint32_t flags,
+						  uint16_t port,
+						  struct nbt_name *name)
+{
+	struct composite_context *c;
+	struct resolve_lmhosts_state *state;
+	struct sockaddr_storage *resolved_iplist;
+	int resolved_count, i;
+
+	if (event_ctx == NULL) {
+		return NULL;
+	}
+
+	c = composite_create(mem_ctx, event_ctx);
+	if (c == NULL) return NULL;
+
+	if (composite_nomem(c->event_ctx, c)) return c;
+
+	state = talloc_zero(c, struct resolve_lmhosts_state);
+	if (composite_nomem(state, c)) return c;
+	c->private_data = state;
+
+	c->status = resolve_lmhosts_file_as_sockaddr(dyn_LMHOSTSFILE, name->name, name->type,
+						     state, &resolved_iplist, &resolved_count);
+	if (!composite_is_ok(c)) return c;
+
+	for (i=0; i < resolved_count; i++) {
+		state->addrs = talloc_realloc(state, state->addrs, struct socket_address *, i+2);
+		if (composite_nomem(state->addrs, c)) return c;
+
+		set_sockaddr_port((struct sockaddr *)&resolved_iplist[i], port);
+
+		state->addrs[i] = socket_address_from_sockaddr(state->addrs, (struct sockaddr *)&resolved_iplist[i], sizeof(resolved_iplist[i]));
+		if (composite_nomem(state->addrs[i], c)) return c;
+
+		state->addrs[i+1] = NULL;
+
+
+		state->names = talloc_realloc(state, state->names, char *, i+2);
+		if (composite_nomem(state->addrs, c)) return c;
+
+		state->names[i] = talloc_strdup(state->names, name->name);
+		if (composite_nomem(state->names[i], c)) return c;
+
+		state->names[i+1] = NULL;
+
+		i++;
+	}
+
+	composite_done(c);
+	return c;
+}
+
+/*
+  general name resolution method - recv side
+ */
+NTSTATUS resolve_name_lmhosts_recv(struct composite_context *c,
+				 TALLOC_CTX *mem_ctx,
+				 struct socket_address ***addrs,
+				 char ***names)
+{
+	NTSTATUS status;
+
+	status = composite_wait(c);
+
+	if (NT_STATUS_IS_OK(status)) {
+		struct resolve_lmhosts_state *state = talloc_get_type(c->private_data, struct resolve_lmhosts_state);
+		*addrs = talloc_steal(mem_ctx, state->addrs);
+		if (names) {
+			*names = talloc_steal(mem_ctx, state->names);
+		}
+	}
+
+	talloc_free(c);
+	return status;
+}
+
+
+bool resolve_context_add_lmhosts_method(struct resolve_context *ctx)
+{
+	return resolve_context_add_method(ctx, resolve_name_lmhosts_send, resolve_name_lmhosts_recv, NULL);
+}

source4/libcli/resolve/resolve_lp.c

@@ -41,6 +41,8 @@ struct resolve_context *lpcfg_resolve_context(struct loadparm_context *lp_ctx)
 			}
 		} else if (!strcmp(methods[i], "file")) {
 			resolve_context_add_file_method_lp(ret, lp_ctx);
+		} else if (!strcmp(methods[i], "lmhosts")) {
+			resolve_context_add_lmhosts_method(ret);
 		} else if (!strcmp(methods[i], "host")) {
 			resolve_context_add_host_method(ret);
 		} else {

source4/libcli/wscript_build

@@ -60,7 +60,7 @@ bld.SAMBA_SUBSYSTEM('LIBCLI_RESOLVE',
 
 
 bld.SAMBA_SUBSYSTEM('LP_RESOLVE',
-	source='resolve/bcast.c resolve/nbtlist.c resolve/wins.c resolve/dns_ex.c resolve/file.c resolve/host.c resolve/resolve_lp.c',
+	source='resolve/bcast.c resolve/nbtlist.c resolve/wins.c resolve/dns_ex.c resolve/file.c resolve/host.c resolve/lmhosts.c resolve/resolve_lp.c',
 	autoproto='resolve/lp_proto.h',
 	deps='cli-nbt samba-hostconfig netif addns'
 	)