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92786aebf1
We were creating the name resolution context as a child of lp_ctx, which meant when we gave up on a connection the timer on name resolution kept running, and when it timed out the callback crashed as the socket was already removed.
99 lines
2.9 KiB
C
99 lines
2.9 KiB
C
/*
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Unix SMB/CIFS implementation.
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wins server dns proxy
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Copyright (C) Stefan Metzmacher 2005
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "nbt_server/nbt_server.h"
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#include "nbt_server/wins/winsdb.h"
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#include "nbt_server/wins/winsserver.h"
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#include "system/time.h"
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#include "libcli/composite/composite.h"
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#include "smbd/service_task.h"
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#include "libcli/resolve/resolve.h"
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struct wins_dns_proxy_state {
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struct nbt_name_socket *nbtsock;
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struct nbt_name_packet *packet;
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struct socket_address *src;
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};
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static void nbtd_wins_dns_proxy_handler(struct composite_context *creq)
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{
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NTSTATUS status;
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struct wins_dns_proxy_state *s = talloc_get_type(creq->async.private_data,
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struct wins_dns_proxy_state);
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struct nbt_name *name = &s->packet->questions[0].name;
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const char *address;
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const char **addresses;
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uint16_t nb_flags = 0; /* TODO: ... */
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status = resolve_name_recv(creq, s->packet, &address);
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if (!NT_STATUS_IS_OK(status)) {
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goto notfound;
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}
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addresses = str_list_add(NULL, address);
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talloc_steal(s->packet, addresses);
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if (!addresses) goto notfound;
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nbtd_name_query_reply(s->nbtsock, s->packet, s->src, name,
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0, nb_flags, addresses);
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return;
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notfound:
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nbtd_negative_name_query_reply(s->nbtsock, s->packet, s->src);
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}
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/*
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dns proxy query a name
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*/
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void nbtd_wins_dns_proxy_query(struct nbt_name_socket *nbtsock,
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struct nbt_name_packet *packet,
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struct socket_address *src)
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{
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struct nbt_name *name = &packet->questions[0].name;
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struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private_data,
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struct nbtd_interface);
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struct wins_dns_proxy_state *s;
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struct composite_context *creq;
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struct resolve_context *resolve_ctx;
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s = talloc(nbtsock, struct wins_dns_proxy_state);
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if (!s) goto failed;
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s->nbtsock = nbtsock;
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s->packet = talloc_steal(s, packet);
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s->src = src;
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if (!talloc_reference(s, src)) {
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goto failed;
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}
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resolve_ctx = resolve_context_init(s);
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if (resolve_ctx == NULL) goto failed;
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resolve_context_add_host_method(resolve_ctx);
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creq = resolve_name_send(resolve_ctx, s, name, iface->nbtsrv->task->event_ctx);
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if (!creq) goto failed;
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creq->async.fn = nbtd_wins_dns_proxy_handler;
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creq->async.private_data= s;
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return;
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failed:
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nbtd_negative_name_query_reply(nbtsock, packet, src);
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}
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