1/* 2 Unix SMB/CIFS implementation. 3 4 wins server dns proxy 5 6 Copyright (C) Stefan Metzmacher 2005 7 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 3 of the License, or 11 (at your option) any later version. 12 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. 17 18 You should have received a copy of the GNU General Public License 19 along with this program. If not, see <http://www.gnu.org/licenses/>. 20*/ 21 22#include "includes.h" 23#include "nbt_server/nbt_server.h" 24#include "nbt_server/wins/winsdb.h" 25#include "nbt_server/wins/winsserver.h" 26#include "system/time.h" 27#include "libcli/composite/composite.h" 28#include "smbd/service_task.h" 29#include "libcli/resolve/resolve.h" 30 31struct wins_dns_proxy_state { 32 struct nbt_name_socket *nbtsock; 33 struct nbt_name_packet *packet; 34 struct socket_address *src; 35}; 36 37static void nbtd_wins_dns_proxy_handler(struct composite_context *creq) 38{ 39 NTSTATUS status; 40 struct wins_dns_proxy_state *s = talloc_get_type(creq->async.private_data, 41 struct wins_dns_proxy_state); 42 struct nbt_name *name = &s->packet->questions[0].name; 43 const char *address; 44 const char **addresses; 45 uint16_t nb_flags = 0; /* TODO: ... */ 46 47 status = resolve_name_recv(creq, s->packet, &address); 48 if (!NT_STATUS_IS_OK(status)) { 49 goto notfound; 50 } 51 52 addresses = str_list_add(NULL, address); 53 talloc_steal(s->packet, addresses); 54 if (!addresses) goto notfound; 55 56 nbtd_name_query_reply(s->nbtsock, s->packet, s->src, name, 57 0, nb_flags, addresses); 58 return; 59notfound: 60 nbtd_negative_name_query_reply(s->nbtsock, s->packet, s->src); 61} 62 63/* 64 dns proxy query a name 65*/ 66void nbtd_wins_dns_proxy_query(struct nbt_name_socket *nbtsock, 67 struct nbt_name_packet *packet, 68 struct socket_address *src) 69{ 70 struct nbt_name *name = &packet->questions[0].name; 71 struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private_data, 72 struct nbtd_interface); 73 struct wins_dns_proxy_state *s; 74 struct composite_context *creq; 75 struct resolve_context *resolve_ctx; 76 77 s = talloc(nbtsock, struct wins_dns_proxy_state); 78 if (!s) goto failed; 79 s->nbtsock = nbtsock; 80 s->packet = talloc_steal(s, packet); 81 s->src = src; 82 if (!talloc_reference(s, src)) { 83 goto failed; 84 } 85 86 resolve_ctx = resolve_context_init(s); 87 if (resolve_ctx == NULL) goto failed; 88 resolve_context_add_host_method(resolve_ctx); 89 90 creq = resolve_name_send(resolve_ctx, s, name, iface->nbtsrv->task->event_ctx); 91 if (!creq) goto failed; 92 93 creq->async.fn = nbtd_wins_dns_proxy_handler; 94 creq->async.private_data= s; 95 return; 96failed: 97 nbtd_negative_name_query_reply(nbtsock, packet, src); 98} 99