mirror of
https://github.com/samba-team/samba.git
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17ae598141
(This used to be commit 2d655f0528
)
211 lines
5.2 KiB
C
211 lines
5.2 KiB
C
/*
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Unix SMB/CIFS implementation.
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Copyright (C) Rafal Szczesniak 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 2 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, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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a composite function for name resolving
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*/
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#include "includes.h"
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#include "lib/events/events.h"
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#include "libnet/libnet.h"
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#include "libcli/composite/composite.h"
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#include "lib/messaging/messaging.h"
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#include "lib/messaging/irpc.h"
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#include "libcli/resolve/resolve.h"
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#include "libcli/finddcs.h"
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struct lookup_state {
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struct composite_context *resolve_ctx;
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struct nbt_name hostname;
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};
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/**
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* Sends asynchronous Lookup request
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*
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* @param io arguments and result of the call
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*/
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struct composite_context *libnet_Lookup_send(struct libnet_context *ctx,
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struct libnet_Lookup *io)
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{
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struct composite_context *c;
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struct lookup_state *s;
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const char** methods;
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if (!io) return NULL;
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/* allocate context and state structures */
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c = talloc_zero(NULL, struct composite_context);
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if (c == NULL) goto failed;
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s = talloc_zero(c, struct lookup_state);
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if (s == NULL) goto failed;
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/* prepare event context */
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c->event_ctx = event_context_find(c);
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if (c->event_ctx == NULL) goto failed;
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/* parameters */
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s->hostname.name = talloc_strdup(s, io->in.hostname);
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s->hostname.type = io->in.type;
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s->hostname.scope = NULL;
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/* name resolution methods */
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if (io->in.methods) {
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methods = io->in.methods;
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} else {
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methods = (const char**)ctx->name_res_methods;
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}
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c->private_data = s;
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c->state = COMPOSITE_STATE_IN_PROGRESS;
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/* send resolve request */
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s->resolve_ctx = resolve_name_send(&s->hostname, c->event_ctx, methods);
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return c;
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failed:
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talloc_free(c);
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return NULL;
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}
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/**
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* Waits for and receives results of asynchronous Lookup call
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*
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* @param c composite context returned by asynchronous Lookup call
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* @param mem_ctx memory context of the call
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* @param io pointer to results (and arguments) of the call
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* @return nt status code of execution
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*/
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NTSTATUS libnet_Lookup_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
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struct libnet_Lookup *io)
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{
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NTSTATUS status;
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struct lookup_state *s;
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const char *address;
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s = talloc_get_type(c->private_data, struct lookup_state);
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status = resolve_name_recv(s->resolve_ctx, mem_ctx, &address);
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if (NT_STATUS_IS_OK(status)) {
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io->out.address = str_list_make(mem_ctx, address, NULL);
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NT_STATUS_HAVE_NO_MEMORY(io->out.address);
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}
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return status;
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}
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/**
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* Synchronous version of Lookup call
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*
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* @param mem_ctx memory context for the call
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* @param io arguments and results of the call
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* @return nt status code of execution
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*/
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NTSTATUS libnet_Lookup(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
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struct libnet_Lookup *io)
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{
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struct composite_context *c = libnet_Lookup_send(ctx, io);
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return libnet_Lookup_recv(c, mem_ctx, io);
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}
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/*
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* Shortcut functions to find common types of name
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* (and skip nbt name type argument)
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*/
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/**
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* Sends asynchronous LookupHost request
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*/
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struct composite_context* libnet_LookupHost_send(struct libnet_context *ctx,
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struct libnet_Lookup *io)
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{
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io->in.type = NBT_NAME_SERVER;
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return libnet_Lookup_send(ctx, io);
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}
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/**
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* Synchronous version of LookupHost call
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*/
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NTSTATUS libnet_LookupHost(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
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struct libnet_Lookup *io)
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{
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struct composite_context *c = libnet_LookupHost_send(ctx, io);
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return libnet_Lookup_recv(c, mem_ctx, io);
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}
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/**
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* Sends asynchronous LookupPdc request
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*/
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struct composite_context* libnet_LookupDCs_send(struct libnet_context *ctx,
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TALLOC_CTX *mem_ctx,
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struct libnet_LookupDCs *io)
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{
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struct messaging_context *msg_ctx = messaging_client_init(mem_ctx, ctx->event_ctx);
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struct composite_context *c;
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c = finddcs_send(mem_ctx,
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io->in.domain_name,
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NBT_NAME_PDC,
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NULL, ctx->name_res_methods,
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ctx->event_ctx, msg_ctx);
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return c;
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}
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/**
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* Waits for and receives results of asynchronous Lookup call
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*
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* @param c composite context returned by asynchronous Lookup call
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* @param mem_ctx memory context of the call
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* @param io pointer to results (and arguments) of the call
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* @return nt status code of execution
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*/
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NTSTATUS libnet_LookupDCs_recv(struct composite_context *c, TALLOC_CTX *mem_ctx,
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struct libnet_LookupDCs *io)
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{
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NTSTATUS status;
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status = finddcs_recv(c, mem_ctx, &io->out.num_dcs, &io->out.dcs);
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if (!NT_STATUS_IS_OK(status)) {
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return status;
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}
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return status;
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}
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/**
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* Synchronous version of LookupPdc
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*/
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NTSTATUS libnet_LookupDCs(struct libnet_context *ctx, TALLOC_CTX *mem_ctx,
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struct libnet_LookupDCs *io)
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{
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struct composite_context *c = libnet_LookupDCs_send(ctx, mem_ctx, io);
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return libnet_LookupDCs_recv(c, mem_ctx, io);
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}
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