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/*
Unix SMB/Netbios implementation.
Generic infrstructure for RPC Daemons
Copyright (C) Simo Sorce 2010
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 <http://www.gnu.org/licenses/>.
*/
#include "includes.h"
#include "rpc_server/rpc_server.h"
#include "rpc_dce.h"
#include "librpc/gen_ndr/netlogon.h"
#include "registry/reg_parse_prs.h"
/* Creates a pipes_struct and initializes it with the information
* sent from the client */
static int make_server_pipes_struct(TALLOC_CTX *mem_ctx,
const char *pipe_name,
const struct ndr_syntax_id id,
const char *client_address,
struct netr_SamInfo3 *info3,
struct pipes_struct **_p,
int *perrno)
{
struct pipes_struct *p;
NTSTATUS status;
bool ok;
p = talloc_zero(mem_ctx, struct pipes_struct);
if (!p) {
*perrno = ENOMEM;
return -1;
}
p->syntax = id;
p->mem_ctx = talloc_named(p, 0, "pipe %s %p", pipe_name, p);
if (!p->mem_ctx) {
TALLOC_FREE(p);
*perrno = ENOMEM;
return -1;
}
ok = init_pipe_handles(p, &id);
if (!ok) {
DEBUG(1, ("Failed to init handles\n"));
TALLOC_FREE(p);
*perrno = EINVAL;
return -1;
}
/*
* Initialize the incoming RPC data buffer with one PDU worth of
* memory. We cheat here and say we're marshalling, as we intend
* to add incoming data directly into the prs_struct and we want
* it to auto grow. We will change the type to UNMARSALLING before
* processing the stream.
*/
if (!prs_init(&p->in_data.data, 128, p->mem_ctx, MARSHALL)) {
DEBUG(0, ("malloc fail for in_data struct.\n"));
TALLOC_FREE(p);
*perrno = ENOMEM;
return -1;
}
/*
* Initialize the outgoing RPC data buffer with no memory.
*/
prs_init_empty(&p->out_data.rdata, p->mem_ctx, MARSHALL);
p->endian = RPC_LITTLE_ENDIAN;
status = make_server_info_info3(p,
info3->base.account_name.string,
info3->base.domain.string,
&p->server_info, info3);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to init server info\n"));
TALLOC_FREE(p);
*perrno = EINVAL;
return -1;
}
/*
* Some internal functions need a local token to determine access to
* resoutrces.
*/
status = create_local_token(p->server_info);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(1, ("Failed to init local auth token\n"));
TALLOC_FREE(p);
*perrno = EINVAL;
return -1;
}
p->client_id = talloc_zero(p, struct client_address);
if (!p->client_id) {
TALLOC_FREE(p);
*perrno = ENOMEM;
return -1;
}
strlcpy(p->client_id->addr,
client_address, sizeof(p->client_id->addr));
talloc_set_destructor(p, close_internal_rpc_pipe_hnd);
*_p = p;
return 0;
}
struct named_pipe_listen_state {
int fd;
char *name;
};
static void named_pipe_listener(struct tevent_context *ev,
struct tevent_fd *fde,
uint16_t flags,
void *private_data);
bool setup_named_pipe_socket(const char *pipe_name,
struct tevent_context *ev_ctx)
{
struct named_pipe_listen_state *state;
struct tevent_fd *fde;
char *np_dir;
state = talloc(ev_ctx, struct named_pipe_listen_state);
if (!state) {
DEBUG(0, ("Out of memory\n"));
return false;
}
state->name = talloc_strdup(state, pipe_name);
if (!state->name) {
DEBUG(0, ("Out of memory\n"));
goto out;
}
state->fd = -1;
np_dir = talloc_asprintf(state, "%s/np", lp_ncalrpc_dir());
if (!np_dir) {
DEBUG(0, ("Out of memory\n"));
goto out;
}
if (!directory_create_or_exist(np_dir, geteuid(), 0700)) {
DEBUG(0, ("Failed to create pipe directory %s - %s\n",
np_dir, strerror(errno)));
goto out;
}
state->fd = create_pipe_sock(np_dir, pipe_name, 0700);
if (state->fd == -1) {
DEBUG(0, ("Failed to create pipe socket! [%s/%s]\n",
np_dir, pipe_name));
goto out;
}
DEBUG(10, ("Openened pipe socket fd %d for %s\n",
state->fd, pipe_name));
fde = tevent_add_fd(ev_ctx,
state, state->fd, TEVENT_FD_READ,
named_pipe_listener, state);
if (!fde) {
DEBUG(0, ("Failed to add event handler!\n"));
goto out;
}
tevent_fd_set_auto_close(fde);
return true;
out:
if (state->fd != -1) {
close(state->fd);
}
TALLOC_FREE(state);
return false;
}
static void named_pipe_accept_function(const char *pipe_name, int fd);
static void named_pipe_listener(struct tevent_context *ev,
struct tevent_fd *fde,
uint16_t flags,
void *private_data)
{
struct named_pipe_listen_state *state =
talloc_get_type_abort(private_data,
struct named_pipe_listen_state);
struct sockaddr_un sunaddr;
socklen_t len;
int sd = -1;
/* TODO: should we have a limit to the number of clients ? */
len = sizeof(sunaddr);
while (sd == -1) {
sd = accept(state->fd,
(struct sockaddr *)(void *)&sunaddr, &len);
if (errno != EINTR) break;
}
if (sd == -1) {
DEBUG(6, ("Failed to get a valid socket [%s]\n",
strerror(errno)));
return;
}
DEBUG(6, ("Accepted socket %d\n", sd));
named_pipe_accept_function(state->name, sd);
}
static void named_pipe_accept_function(const char *pipe_name, int fd)
{
return;
}
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