From 4f5791ebd03eaec1c7da0865a383175b05102712 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 5 May 2024 19:47:29 +0200 Subject: Adding upstream version 2:4.17.12+dfsg. Signed-off-by: Daniel Baumann --- source4/nbt_server/wins/wins_dns_proxy.c | 99 ++++++++++++++++++++++++++++++++ 1 file changed, 99 insertions(+) create mode 100644 source4/nbt_server/wins/wins_dns_proxy.c (limited to 'source4/nbt_server/wins/wins_dns_proxy.c') diff --git a/source4/nbt_server/wins/wins_dns_proxy.c b/source4/nbt_server/wins/wins_dns_proxy.c new file mode 100644 index 0000000..95ceb21 --- /dev/null +++ b/source4/nbt_server/wins/wins_dns_proxy.c @@ -0,0 +1,99 @@ +/* + Unix SMB/CIFS implementation. + + wins server dns proxy + + Copyright (C) Stefan Metzmacher 2005 + + 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 . +*/ + +#include "includes.h" +#include "nbt_server/nbt_server.h" +#include "nbt_server/wins/winsdb.h" +#include "nbt_server/wins/winsserver.h" +#include "system/time.h" +#include "libcli/composite/composite.h" +#include "samba/service_task.h" +#include "libcli/resolve/resolve.h" +#include "lib/socket/socket.h" + +struct wins_dns_proxy_state { + struct nbt_name_socket *nbtsock; + struct nbt_name_packet *packet; + struct socket_address *src; +}; + +static void nbtd_wins_dns_proxy_handler(struct composite_context *creq) +{ + NTSTATUS status; + struct wins_dns_proxy_state *s = talloc_get_type(creq->async.private_data, + struct wins_dns_proxy_state); + struct nbt_name *name = &s->packet->questions[0].name; + const char *address; + const char **addresses; + uint16_t nb_flags = 0; /* TODO: ... */ + + status = resolve_name_recv(creq, s->packet, &address); + if (!NT_STATUS_IS_OK(status)) { + goto notfound; + } + + addresses = str_list_add(NULL, address); + talloc_steal(s->packet, addresses); + if (!addresses) goto notfound; + + nbtd_name_query_reply(s->nbtsock, s->packet, s->src, name, + 0, nb_flags, addresses); + return; +notfound: + nbtd_negative_name_query_reply(s->nbtsock, s->packet, s->src); +} + +/* + dns proxy query a name +*/ +void nbtd_wins_dns_proxy_query(struct nbt_name_socket *nbtsock, + struct nbt_name_packet *packet, + struct socket_address *src) +{ + struct nbt_name *name = &packet->questions[0].name; + struct nbtd_interface *iface = talloc_get_type(nbtsock->incoming.private_data, + struct nbtd_interface); + struct wins_dns_proxy_state *s; + struct composite_context *creq; + struct resolve_context *resolve_ctx; + + s = talloc(nbtsock, struct wins_dns_proxy_state); + if (!s) goto failed; + s->nbtsock = nbtsock; + s->packet = talloc_steal(s, packet); + s->src = socket_address_copy(s, src); + if (s->src == NULL) { + goto failed; + } + + resolve_ctx = resolve_context_init(s); + if (resolve_ctx == NULL) goto failed; + resolve_context_add_host_method(resolve_ctx); + + creq = resolve_name_send(resolve_ctx, s, name, iface->nbtsrv->task->event_ctx); + if (!creq) goto failed; + + creq->async.fn = nbtd_wins_dns_proxy_handler; + creq->async.private_data= s; + return; +failed: + nbtd_negative_name_query_reply(nbtsock, packet, src); +} -- cgit v1.2.3