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/*
Unix SMB/CIFS implementation.
Copyright (C) Volker Lendecke
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
a composite API to fire connect calls to multiple targets, picking the first
one.
*/
#include "includes.h"
#include "libcli/raw/libcliraw.h"
#include "libcli/composite/composite.h"
#include "libcli/smb_composite/smb_composite.h"
struct connectmulti_state {
struct smb_composite_connectmulti *io;
struct composite_context *creq;
struct smbcli_socket *result;
int num_socks, socks_left;
struct smbcli_socket **socks;
struct composite_context **creqs;
};
static void connect_receive(struct composite_context *c)
{
struct connectmulti_state *state =
talloc_get_type(c->async.private_data,
struct connectmulti_state);
int i;
for (i=0; i<state->num_socks; i++) {
if (state->creqs[i] == c) {
break;
}
}
if (i == state->num_socks) {
c->status = NT_STATUS_INTERNAL_ERROR;
c->state = COMPOSITE_STATE_ERROR;
if (state->creq->async.fn != NULL) {
state->creq->async.fn(state->creq);
}
return;
}
state->creq->status = smbcli_sock_connect_recv(c);
if (!NT_STATUS_IS_OK(state->creq->status)) {
talloc_free(state->socks[i]);
state->socks[i] = NULL;
state->creqs[i] = NULL;
state->socks_left -= 1;
if (state->socks_left == 0) {
state->creq->state = COMPOSITE_STATE_ERROR;
if (state->creq->async.fn != NULL) {
state->creq->async.fn(state->creq);
}
}
return;
}
state->result = talloc_steal(state, state->socks[i]);
talloc_free(state->socks);
state->creq->state = COMPOSITE_STATE_DONE;
if (state->creq->async.fn != NULL) {
state->creq->async.fn(state->creq);
}
}
struct composite_context *smb_composite_connectmulti_send(struct smb_composite_connectmulti *io,
TALLOC_CTX *mem_ctx,
struct event_context *event_ctx)
{
struct composite_context *c;
struct connectmulti_state *state;
int num_socks = io->in.num_dests;
const char **hostnames = io->in.hostnames;
const char **addresses = io->in.addresses;
int *ports = io->in.ports;
int i;
c = talloc_zero(mem_ctx, struct composite_context);
if (c == NULL) goto failed;
state = talloc(c, struct connectmulti_state);
if (state == NULL) goto failed;
c->state = COMPOSITE_STATE_IN_PROGRESS;
c->event_ctx = talloc_reference(c, event_ctx);
c->private_data = state;
if (ports == NULL) {
int j, nports;
const char **smb_ports = lp_smb_ports();
for (nports=0; smb_ports[nports]; nports++) /* noop */;
num_socks *= nports;
hostnames = talloc_array(state, const char *, num_socks);
if (hostnames == NULL) goto failed;
addresses = talloc_array(state, const char *, num_socks);
if (addresses == NULL) goto failed;
ports = talloc_array(state, int, num_socks);
if (ports == NULL) goto failed;
for (i=0; i<io->in.num_dests; i++) {
for (j=0; j<nports; j++) {
hostnames[i*nports+j] = io->in.hostnames[i];
addresses[i*nports+j] = io->in.addresses[i];
ports[i*nports+j] = atoi(smb_ports[j]);
}
}
}
state->io = io;
state->creq = c;
state->num_socks = num_socks;
state->socks_left = num_socks;
state->socks = talloc_array(state, struct smbcli_socket *, num_socks);
state->creqs = talloc_array(state, struct composite_context *,
num_socks);
if ((state->socks == NULL) || (state->creqs == NULL)) goto failed;
for (i=0; i<num_socks; i++) {
state->socks[i] = smbcli_sock_init(state->socks, event_ctx);
if (state->socks[i] == NULL) goto failed;
/* If the event_ctx we got given is NULL, the first socket
* creates one and all others need to refer to it. */
event_ctx = state->socks[i]->event.ctx;
state->creqs[i] = smbcli_sock_connect_send(state->socks[i],
addresses[i],
ports[i],
hostnames[i]);
if (state->creqs[i] == NULL) goto failed;
state->creqs[i]->async.fn = connect_receive;
state->creqs[i]->async.private_data = state;
}
return c;
failed:
talloc_free(c);
return NULL;
}
NTSTATUS smb_composite_connectmulti_recv(struct composite_context *c,
TALLOC_CTX *mem_ctx)
{
NTSTATUS status;
status = composite_wait(c);
if (NT_STATUS_IS_OK(status)) {
struct connectmulti_state *state =
talloc_get_type(c->private_data,
struct connectmulti_state);
state->io->out.socket = talloc_steal(mem_ctx, state->result);
}
talloc_free(c);
return status;
}
NTSTATUS smb_composite_connectmulti(struct smb_composite_connectmulti *io,
TALLOC_CTX *mem_ctx,
struct event_context *ev)
{
struct composite_context *c =
smb_composite_connectmulti_send(io, mem_ctx, ev);
return smb_composite_connectmulti_recv(c, mem_ctx);
}
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