1/* 2 Unix SMB/CIFS implementation. 3 4 broadcast name resolution module 5 6 Copyright (C) Andrew Tridgell 2005 7 Copyright (C) Jelmer Vernooij 2007 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 "libcli/resolve/resolve.h" 25#include "system/network.h" 26#include "lib/socket/netif.h" 27#include "param/param.h" 28 29struct resolve_bcast_data { 30 struct interface *ifaces; 31 uint16_t nbt_port; 32 int nbt_timeout; 33}; 34 35/** 36 broadcast name resolution method - async send 37 */ 38struct composite_context *resolve_name_bcast_send(TALLOC_CTX *mem_ctx, 39 struct tevent_context *event_ctx, 40 void *userdata, uint32_t flags, 41 uint16_t port, 42 struct nbt_name *name) 43{ 44 int num_interfaces; 45 const char **address_list; 46 struct composite_context *c; 47 int i, count=0; 48 struct resolve_bcast_data *data = talloc_get_type(userdata, struct resolve_bcast_data); 49 50 num_interfaces = iface_count(data->ifaces); 51 52 address_list = talloc_array(mem_ctx, const char *, num_interfaces+1); 53 if (address_list == NULL) return NULL; 54 55 for (i=0;i<num_interfaces;i++) { 56 const char *bcast = iface_n_bcast(data->ifaces, i); 57 if (bcast == NULL) continue; 58 address_list[count] = talloc_strdup(address_list, bcast); 59 if (address_list[count] == NULL) { 60 talloc_free(address_list); 61 return NULL; 62 } 63 count++; 64 } 65 address_list[count] = NULL; 66 67 c = resolve_name_nbtlist_send(mem_ctx, event_ctx, flags, port, name, 68 address_list, data->ifaces, data->nbt_port, 69 data->nbt_timeout, true, false); 70 talloc_free(address_list); 71 72 return c; 73} 74 75/* 76 broadcast name resolution method - recv side 77 */ 78NTSTATUS resolve_name_bcast_recv(struct composite_context *c, 79 TALLOC_CTX *mem_ctx, 80 struct socket_address ***addrs, 81 char ***names) 82{ 83 NTSTATUS status = resolve_name_nbtlist_recv(c, mem_ctx, addrs, names); 84 if (NT_STATUS_EQUAL(status, NT_STATUS_IO_TIMEOUT)) { 85 /* this makes much more sense for a bcast name resolution 86 timeout */ 87 status = NT_STATUS_OBJECT_NAME_NOT_FOUND; 88 } 89 return status; 90} 91 92bool resolve_context_add_bcast_method(struct resolve_context *ctx, struct interface *ifaces, uint16_t nbt_port, int nbt_timeout) 93{ 94 struct resolve_bcast_data *data = talloc(ctx, struct resolve_bcast_data); 95 data->ifaces = ifaces; 96 data->nbt_port = nbt_port; 97 data->nbt_timeout = nbt_timeout; 98 return resolve_context_add_method(ctx, resolve_name_bcast_send, resolve_name_bcast_recv, data); 99} 100 101bool resolve_context_add_bcast_method_lp(struct resolve_context *ctx, struct loadparm_context *lp_ctx) 102{ 103 struct interface *ifaces; 104 load_interfaces(ctx, lp_interfaces(lp_ctx), &ifaces); 105 return resolve_context_add_bcast_method(ctx, ifaces, lp_nbt_port(lp_ctx), lp_parm_int(lp_ctx, NULL, "nbt", "timeout", 1)); 106} 107