mirror of
https://github.com/samba-team/samba.git
synced 2024-12-24 21:34:56 +03:00
s3: Basic infrastructure for /tmp/.nmbd/unexpected
This provides the framework to replace the unexpected.tdb file. Nmbd will listen on /tmp/.nmbd/unexpected. A client interested in unexpected packets connects there. It sends a nb_packet_query plus a potential mailslot name for dgram packets. It waits for a single ack byte to avoid races. After that has happened, nmbd will pass down all matching packets through that socket. nb_packet_server_create and nb_packet_dispatch are the nmbd routines, nb_packet_reader_send/recv and nb_packet_read_send/recv are the client ones.
This commit is contained in:
Volker Lendecke
parent
6a0a0478ad
commit
b2c62d639d
@ -2933,6 +2933,28 @@ void clear_unexpected(time_t t);
|
||||
struct packet_struct *receive_unexpected(enum packet_type packet_type, int id,
|
||||
const char *mailslot_name);
|
||||
|
||||
struct nb_packet_server;
|
||||
struct nb_packet_reader;
|
||||
|
||||
NTSTATUS nb_packet_server_create(TALLOC_CTX *mem_ctx,
|
||||
struct tevent_context *ev,
|
||||
int max_clients,
|
||||
struct nb_packet_server **presult);
|
||||
void nb_packet_dispatch(struct nb_packet_server *server,
|
||||
struct packet_struct *p);
|
||||
struct tevent_req *nb_packet_reader_send(TALLOC_CTX *mem_ctx,
|
||||
struct tevent_context *ev,
|
||||
enum packet_type type,
|
||||
int trn_id,
|
||||
const char *mailslot_name);
|
||||
NTSTATUS nb_packet_reader_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
|
||||
struct nb_packet_reader **preader);
|
||||
struct tevent_req *nb_packet_read_send(TALLOC_CTX *mem_ctx,
|
||||
struct tevent_context *ev,
|
||||
struct nb_packet_reader *reader);
|
||||
NTSTATUS nb_packet_read_recv(struct tevent_req *req,
|
||||
struct packet_struct **ppacket);
|
||||
|
||||
/* The following definitions come from locking/brlock.c */
|
||||
|
||||
bool brl_same_context(const struct lock_context *ctx1,
|
||||
|
||||
@ -19,6 +19,7 @@
|
||||
*/
|
||||
|
||||
#include "includes.h"
|
||||
#include "lib/async_req/async_sock.h"
|
||||
|
||||
static struct tdb_wrap *tdbd = NULL;
|
||||
|
||||
@ -333,3 +334,679 @@ struct packet_struct *receive_unexpected(enum packet_type packet_type, int id,
|
||||
|
||||
return state.matched_packet;
|
||||
}
|
||||
|
||||
static const char *nmbd_socket_dir(void)
|
||||
{
|
||||
return lp_parm_const_string(-1, "nmbd", "socket dir", "/tmp/.nmbd");
|
||||
}
|
||||
|
||||
struct nb_packet_query {
|
||||
enum packet_type type;
|
||||
size_t mailslot_namelen;
|
||||
int trn_id;
|
||||
};
|
||||
|
||||
struct nb_packet_client;
|
||||
|
||||
struct nb_packet_server {
|
||||
struct tevent_context *ev;
|
||||
int listen_sock;
|
||||
int max_clients;
|
||||
int num_clients;
|
||||
struct nb_packet_client *clients;
|
||||
};
|
||||
|
||||
struct nb_packet_client {
|
||||
struct nb_packet_client *prev, *next;
|
||||
struct nb_packet_server *server;
|
||||
|
||||
enum packet_type type;
|
||||
int trn_id;
|
||||
char *mailslot_name;
|
||||
|
||||
int sock;
|
||||
struct tevent_req *read_req;
|
||||
struct tevent_queue *out_queue;
|
||||
};
|
||||
|
||||
static int nb_packet_server_destructor(struct nb_packet_server *s);
|
||||
static void nb_packet_server_listener(struct tevent_context *ev,
|
||||
struct tevent_fd *fde,
|
||||
uint16_t flags,
|
||||
void *private_data);
|
||||
|
||||
NTSTATUS nb_packet_server_create(TALLOC_CTX *mem_ctx,
|
||||
struct tevent_context *ev,
|
||||
int max_clients,
|
||||
struct nb_packet_server **presult)
|
||||
{
|
||||
struct nb_packet_server *result;
|
||||
struct tevent_fd *fde;
|
||||
NTSTATUS status;
|
||||
|
||||
result = TALLOC_ZERO_P(mem_ctx, struct nb_packet_server);
|
||||
if (result == NULL) {
|
||||
status = NT_STATUS_NO_MEMORY;
|
||||
goto fail;
|
||||
}
|
||||
result->ev = ev;
|
||||
result->max_clients = max_clients;
|
||||
|
||||
result->listen_sock = create_pipe_sock(
|
||||
nmbd_socket_dir(), "unexpected", 0755);
|
||||
if (result->listen_sock == -1) {
|
||||
status = map_nt_error_from_unix(errno);
|
||||
goto fail;
|
||||
}
|
||||
talloc_set_destructor(result, nb_packet_server_destructor);
|
||||
|
||||
fde = tevent_add_fd(ev, result, result->listen_sock, TEVENT_FD_READ,
|
||||
nb_packet_server_listener, result);
|
||||
if (fde == NULL) {
|
||||
status = NT_STATUS_NO_MEMORY;
|
||||
goto fail;
|
||||
}
|
||||
|
||||
*presult = result;
|
||||
return NT_STATUS_OK;
|
||||
fail:
|
||||
TALLOC_FREE(result);
|
||||
return status;
|
||||
}
|
||||
|
||||
static int nb_packet_server_destructor(struct nb_packet_server *s)
|
||||
{
|
||||
if (s->listen_sock != -1) {
|
||||
close(s->listen_sock);
|
||||
s->listen_sock = -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int nb_packet_client_destructor(struct nb_packet_client *c);
|
||||
static ssize_t nb_packet_client_more(uint8_t *buf, size_t buflen,
|
||||
void *private_data);
|
||||
static void nb_packet_got_query(struct tevent_req *req);
|
||||
static void nb_packet_client_read_done(struct tevent_req *req);
|
||||
|
||||
static void nb_packet_server_listener(struct tevent_context *ev,
|
||||
struct tevent_fd *fde,
|
||||
uint16_t flags,
|
||||
void *private_data)
|
||||
{
|
||||
struct nb_packet_server *server = talloc_get_type_abort(
|
||||
private_data, struct nb_packet_server);
|
||||
struct nb_packet_client *client;
|
||||
struct tevent_req *req;
|
||||
struct sockaddr_un sunaddr;
|
||||
socklen_t len;
|
||||
int sock;
|
||||
|
||||
len = sizeof(sunaddr);
|
||||
|
||||
sock = accept(server->listen_sock, (struct sockaddr *)(void *)&sunaddr,
|
||||
&len);
|
||||
if (sock == -1) {
|
||||
return;
|
||||
}
|
||||
DEBUG(6,("accepted socket %d\n", sock));
|
||||
|
||||
client = TALLOC_ZERO_P(server, struct nb_packet_client);
|
||||
if (client == NULL) {
|
||||
DEBUG(10, ("talloc failed\n"));
|
||||
close(sock);
|
||||
return;
|
||||
}
|
||||
client->sock = sock;
|
||||
client->server = server;
|
||||
talloc_set_destructor(client, nb_packet_client_destructor);
|
||||
|
||||
client->out_queue = tevent_queue_create(
|
||||
client, "unexpected packet output");
|
||||
if (client->out_queue == NULL) {
|
||||
DEBUG(10, ("tevent_queue_create failed\n"));
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
|
||||
req = read_packet_send(client, ev, client->sock,
|
||||
sizeof(struct nb_packet_query),
|
||||
nb_packet_client_more, NULL);
|
||||
if (req == NULL) {
|
||||
DEBUG(10, ("read_packet_send failed\n"));
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
tevent_req_set_callback(req, nb_packet_got_query, client);
|
||||
|
||||
DLIST_ADD(server->clients, client);
|
||||
server->num_clients += 1;
|
||||
}
|
||||
|
||||
static ssize_t nb_packet_client_more(uint8_t *buf, size_t buflen,
|
||||
void *private_data)
|
||||
{
|
||||
struct nb_packet_query q;
|
||||
if (buflen > sizeof(struct nb_packet_query)) {
|
||||
return 0;
|
||||
}
|
||||
/* Take care of alignment */
|
||||
memcpy(&q, buf, sizeof(q));
|
||||
if (q.mailslot_namelen > 1024) {
|
||||
DEBUG(10, ("Got invalid mailslot namelen %d\n",
|
||||
(int)q.mailslot_namelen));
|
||||
return -1;
|
||||
}
|
||||
return q.mailslot_namelen;
|
||||
}
|
||||
|
||||
static int nb_packet_client_destructor(struct nb_packet_client *c)
|
||||
{
|
||||
if (c->sock != -1) {
|
||||
close(c->sock);
|
||||
c->sock = -1;
|
||||
}
|
||||
DLIST_REMOVE(c->server->clients, c);
|
||||
c->server->num_clients -= 1;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void nb_packet_got_query(struct tevent_req *req)
|
||||
{
|
||||
struct nb_packet_client *client = tevent_req_callback_data(
|
||||
req, struct nb_packet_client);
|
||||
struct nb_packet_query q;
|
||||
uint8_t *buf;
|
||||
ssize_t nread, nwritten;
|
||||
int err;
|
||||
char c;
|
||||
|
||||
nread = read_packet_recv(req, talloc_tos(), &buf, &err);
|
||||
TALLOC_FREE(req);
|
||||
if (nread < sizeof(struct nb_packet_query)) {
|
||||
DEBUG(10, ("read_packet_recv returned %d (%s)\n",
|
||||
(int)nread,
|
||||
(nread == -1) ? strerror(err) : "wrong length"));
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
|
||||
/* Take care of alignment */
|
||||
memcpy(&q, buf, sizeof(q));
|
||||
|
||||
if (nread != sizeof(struct nb_packet_query) + q.mailslot_namelen) {
|
||||
DEBUG(10, ("nb_packet_got_query: Invalid mailslot namelength\n"));
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
|
||||
client->trn_id = q.trn_id;
|
||||
client->type = q.type;
|
||||
if (q.mailslot_namelen > 0) {
|
||||
client->mailslot_name = talloc_strndup(
|
||||
client, (char *)buf + sizeof(q),
|
||||
q.mailslot_namelen);
|
||||
if (client->mailslot_name == NULL) {
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
}
|
||||
|
||||
/*
|
||||
* Yes, this is a blocking write of 1 byte into a unix
|
||||
* domain socket that has never been written to. Highly
|
||||
* unlikely that this actually blocks.
|
||||
*/
|
||||
c = 0;
|
||||
nwritten = sys_write(client->sock, &c, sizeof(c));
|
||||
if (nwritten != sizeof(c)) {
|
||||
DEBUG(10, ("Could not write success indicator to client: %s\n",
|
||||
strerror(errno)));
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
|
||||
client->read_req = read_packet_send(client, client->server->ev,
|
||||
client->sock, 1, NULL, NULL);
|
||||
if (client->read_req == NULL) {
|
||||
DEBUG(10, ("Could not activate reader for client exit "
|
||||
"detection\n"));
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
tevent_req_set_callback(client->read_req, nb_packet_client_read_done,
|
||||
client);
|
||||
}
|
||||
|
||||
static void nb_packet_client_read_done(struct tevent_req *req)
|
||||
{
|
||||
struct nb_packet_client *client = tevent_req_callback_data(
|
||||
req, struct nb_packet_client);
|
||||
ssize_t nread;
|
||||
uint8_t *buf;
|
||||
int err;
|
||||
|
||||
nread = read_packet_recv(req, talloc_tos(), &buf, &err);
|
||||
TALLOC_FREE(req);
|
||||
if (nread == 1) {
|
||||
DEBUG(10, ("Protocol error, received data on write-only "
|
||||
"unexpected socket: 0x%2.2x\n", (*buf)));
|
||||
}
|
||||
TALLOC_FREE(client);
|
||||
}
|
||||
|
||||
static void nb_packet_client_send(struct nb_packet_client *client,
|
||||
struct packet_struct *p);
|
||||
|
||||
void nb_packet_dispatch(struct nb_packet_server *server,
|
||||
struct packet_struct *p)
|
||||
{
|
||||
struct nb_packet_client *c;
|
||||
uint16_t trn_id;
|
||||
|
||||
switch (p->packet_type) {
|
||||
case NMB_PACKET:
|
||||
trn_id = p->packet.nmb.header.name_trn_id;
|
||||
break;
|
||||
case DGRAM_PACKET:
|
||||
trn_id = p->packet.dgram.header.dgm_id;
|
||||
break;
|
||||
default:
|
||||
DEBUG(10, ("Got invalid packet type %d\n",
|
||||
(int)p->packet_type));
|
||||
return;
|
||||
}
|
||||
for (c = server->clients; c != NULL; c = c->next) {
|
||||
|
||||
if (c->type != p->packet_type) {
|
||||
DEBUG(10, ("client expects packet %d, got %d\n",
|
||||
c->type, p->packet_type));
|
||||
continue;
|
||||
}
|
||||
|
||||
if (p->packet_type == NMB_PACKET) {
|
||||
/*
|
||||
* See if the client specified transaction
|
||||
* ID. Filter if it did.
|
||||
*/
|
||||
if ((c->trn_id != -1) &&
|
||||
(c->trn_id != trn_id)) {
|
||||
DEBUG(10, ("client expects trn %d, got %d\n",
|
||||
c->trn_id, trn_id));
|
||||
continue;
|
||||
}
|
||||
} else {
|
||||
/*
|
||||
* See if the client specified a mailslot
|
||||
* name. Filter if it did.
|
||||
*/
|
||||
if ((c->mailslot_name != NULL) &&
|
||||
!match_mailslot_name(p, c->mailslot_name)) {
|
||||
continue;
|
||||
}
|
||||
}
|
||||
nb_packet_client_send(c, p);
|
||||
}
|
||||
}
|
||||
|
||||
struct nb_packet_client_header {
|
||||
size_t len;
|
||||
enum packet_type type;
|
||||
time_t timestamp;
|
||||
struct in_addr ip;
|
||||
int port;
|
||||
};
|
||||
|
||||
struct nb_packet_client_state {
|
||||
struct nb_packet_client *client;
|
||||
struct iovec iov[2];
|
||||
struct nb_packet_client_header hdr;
|
||||
char buf[1024];
|
||||
};
|
||||
|
||||
static void nb_packet_client_send_done(struct tevent_req *req);
|
||||
|
||||
static void nb_packet_client_send(struct nb_packet_client *client,
|
||||
struct packet_struct *p)
|
||||
{
|
||||
struct nb_packet_client_state *state;
|
||||
struct tevent_req *req;
|
||||
|
||||
state = TALLOC_ZERO_P(client, struct nb_packet_client_state);
|
||||
if (state == NULL) {
|
||||
DEBUG(10, ("talloc failed\n"));
|
||||
return;
|
||||
}
|
||||
|
||||
state->client = client;
|
||||
|
||||
state->hdr.ip = p->ip;
|
||||
state->hdr.port = p->port;
|
||||
state->hdr.timestamp = p->timestamp;
|
||||
state->hdr.type = p->packet_type;
|
||||
state->hdr.len = build_packet(state->buf, sizeof(state->buf), p);
|
||||
|
||||
state->iov[0].iov_base = &state->hdr;
|
||||
state->iov[0].iov_len = sizeof(state->hdr);
|
||||
state->iov[1].iov_base = state->buf;
|
||||
state->iov[1].iov_len = state->hdr.len;
|
||||
|
||||
TALLOC_FREE(client->read_req);
|
||||
|
||||
req = writev_send(client, client->server->ev, client->out_queue,
|
||||
client->sock, true, state->iov, 2);
|
||||
if (req == NULL) {
|
||||
DEBUG(10, ("writev_send failed\n"));
|
||||
return;
|
||||
}
|
||||
tevent_req_set_callback(req, nb_packet_client_send_done, state);
|
||||
}
|
||||
|
||||
static void nb_packet_client_send_done(struct tevent_req *req)
|
||||
{
|
||||
struct nb_packet_client_state *state = tevent_req_callback_data(
|
||||
req, struct nb_packet_client_state);
|
||||
struct nb_packet_client *client = state->client;
|
||||
ssize_t nwritten;
|
||||
int err;
|
||||
|
||||
nwritten = writev_recv(req, &err);
|
||||
|
||||
TALLOC_FREE(req);
|
||||
TALLOC_FREE(state);
|
||||
|
||||
if (nwritten == -1) {
|
||||
DEBUG(10, ("writev failed: %s\n", strerror(err)));
|
||||
TALLOC_FREE(client);
|
||||
}
|
||||
|
||||
if (tevent_queue_length(client->out_queue) == 0) {
|
||||
client->read_req = read_packet_send(client, client->server->ev,
|
||||
client->sock, 1,
|
||||
NULL, NULL);
|
||||
if (client->read_req == NULL) {
|
||||
DEBUG(10, ("Could not activate reader for client exit "
|
||||
"detection\n"));
|
||||
TALLOC_FREE(client);
|
||||
return;
|
||||
}
|
||||
tevent_req_set_callback(client->read_req,
|
||||
nb_packet_client_read_done,
|
||||
client);
|
||||
}
|
||||
}
|
||||
|
||||
struct nb_packet_reader {
|
||||
int sock;
|
||||
};
|
||||
|
||||
struct nb_packet_reader_state {
|
||||
struct tevent_context *ev;
|
||||
struct sockaddr_un addr;
|
||||
struct nb_packet_query query;
|
||||
const char *mailslot_name;
|
||||
struct iovec iov[2];
|
||||
char c;
|
||||
struct nb_packet_reader *reader;
|
||||
};
|
||||
|
||||
static int nb_packet_reader_destructor(struct nb_packet_reader *r);
|
||||
static void nb_packet_reader_connected(struct tevent_req *subreq);
|
||||
static void nb_packet_reader_sent_query(struct tevent_req *subreq);
|
||||
static void nb_packet_reader_got_ack(struct tevent_req *subreq);
|
||||
|
||||
struct tevent_req *nb_packet_reader_send(TALLOC_CTX *mem_ctx,
|
||||
struct tevent_context *ev,
|
||||
enum packet_type type,
|
||||
int trn_id,
|
||||
const char *mailslot_name)
|
||||
{
|
||||
struct tevent_req *req, *subreq;
|
||||
struct nb_packet_reader_state *state;
|
||||
char *path;
|
||||
|
||||
req = tevent_req_create(mem_ctx, &state,
|
||||
struct nb_packet_reader_state);
|
||||
if (req == NULL) {
|
||||
return NULL;
|
||||
}
|
||||
state->ev = ev;
|
||||
state->query.trn_id = trn_id;
|
||||
state->query.type = type;
|
||||
state->mailslot_name = mailslot_name;
|
||||
|
||||
if (mailslot_name != NULL) {
|
||||
state->query.mailslot_namelen = strlen(mailslot_name);
|
||||
}
|
||||
|
||||
state->reader = TALLOC_ZERO_P(state, struct nb_packet_reader);
|
||||
if (tevent_req_nomem(state->reader, req)) {
|
||||
return tevent_req_post(req, ev);
|
||||
}
|
||||
|
||||
path = talloc_asprintf(talloc_tos(), "%s/%s", nmbd_socket_dir(),
|
||||
"unexpected");
|
||||
if (tevent_req_nomem(path, req)) {
|
||||
return tevent_req_post(req, ev);
|
||||
}
|
||||
state->addr.sun_family = AF_UNIX;
|
||||
strlcpy(state->addr.sun_path, path, sizeof(state->addr.sun_path));
|
||||
TALLOC_FREE(path);
|
||||
|
||||
state->reader->sock = socket(AF_UNIX, SOCK_STREAM, 0);
|
||||
if (state->reader->sock == -1) {
|
||||
tevent_req_nterror(req, map_nt_error_from_unix(errno));
|
||||
return tevent_req_post(req, ev);
|
||||
}
|
||||
talloc_set_destructor(state->reader, nb_packet_reader_destructor);
|
||||
|
||||
subreq = async_connect_send(state, ev, state->reader->sock,
|
||||
(struct sockaddr *)(void *)&state->addr,
|
||||
sizeof(state->addr));
|
||||
if (tevent_req_nomem(subreq, req)) {
|
||||
return tevent_req_post(req, ev);
|
||||
}
|
||||
tevent_req_set_callback(subreq, nb_packet_reader_connected, req);
|
||||
return req;
|
||||
}
|
||||
|
||||
static int nb_packet_reader_destructor(struct nb_packet_reader *r)
|
||||
{
|
||||
if (r->sock != -1) {
|
||||
close(r->sock);
|
||||
r->sock = -1;
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void nb_packet_reader_connected(struct tevent_req *subreq)
|
||||
{
|
||||
struct tevent_req *req = tevent_req_callback_data(
|
||||
subreq, struct tevent_req);
|
||||
struct nb_packet_reader_state *state = tevent_req_data(
|
||||
req, struct nb_packet_reader_state);
|
||||
int res, err;
|
||||
int num_iovecs = 1;
|
||||
|
||||
res = async_connect_recv(subreq, &err);
|
||||
TALLOC_FREE(subreq);
|
||||
if (res == -1) {
|
||||
DEBUG(10, ("async_connect failed: %s\n", strerror(err)));
|
||||
tevent_req_nterror(req, map_nt_error_from_unix(err));
|
||||
return;
|
||||
}
|
||||
|
||||
state->iov[0].iov_base = &state->query;
|
||||
state->iov[0].iov_len = sizeof(state->query);
|
||||
|
||||
if (state->mailslot_name != NULL) {
|
||||
num_iovecs = 2;
|
||||
state->iov[1].iov_base = discard_const_p(
|
||||
char, state->mailslot_name);
|
||||
state->iov[1].iov_len = state->query.mailslot_namelen;
|
||||
}
|
||||
|
||||
subreq = writev_send(state, state->ev, NULL, state->reader->sock,
|
||||
true, state->iov, num_iovecs);
|
||||
if (tevent_req_nomem(subreq, req)) {
|
||||
return;
|
||||
}
|
||||
tevent_req_set_callback(subreq, nb_packet_reader_sent_query, req);
|
||||
}
|
||||
|
||||
static void nb_packet_reader_sent_query(struct tevent_req *subreq)
|
||||
{
|
||||
struct tevent_req *req = tevent_req_callback_data(
|
||||
subreq, struct tevent_req);
|
||||
struct nb_packet_reader_state *state = tevent_req_data(
|
||||
req, struct nb_packet_reader_state);
|
||||
ssize_t written;
|
||||
int err;
|
||||
|
||||
written = writev_recv(subreq, &err);
|
||||
TALLOC_FREE(subreq);
|
||||
if (written == -1) {
|
||||
tevent_req_nterror(req, map_nt_error_from_unix(err));
|
||||
return;
|
||||
}
|
||||
if (written != sizeof(state->query) + state->query.mailslot_namelen) {
|
||||
tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR);
|
||||
return;
|
||||
}
|
||||
subreq = read_packet_send(state, state->ev, state->reader->sock,
|
||||
sizeof(state->c), NULL, NULL);
|
||||
if (tevent_req_nomem(subreq, req)) {
|
||||
return;
|
||||
}
|
||||
tevent_req_set_callback(subreq, nb_packet_reader_got_ack, req);
|
||||
}
|
||||
|
||||
static void nb_packet_reader_got_ack(struct tevent_req *subreq)
|
||||
{
|
||||
struct tevent_req *req = tevent_req_callback_data(
|
||||
subreq, struct tevent_req);
|
||||
struct nb_packet_reader_state *state = tevent_req_data(
|
||||
req, struct nb_packet_reader_state);
|
||||
ssize_t nread;
|
||||
int err;
|
||||
uint8_t *buf;
|
||||
|
||||
nread = read_packet_recv(subreq, state, &buf, &err);
|
||||
TALLOC_FREE(subreq);
|
||||
if (nread == -1) {
|
||||
DEBUG(10, ("read_packet_recv returned %s\n",
|
||||
strerror(err)));
|
||||
tevent_req_nterror(req, map_nt_error_from_unix(err));
|
||||
return;
|
||||
}
|
||||
if (nread != sizeof(state->c)) {
|
||||
DEBUG(10, ("read = %d, expected %d\n", (int)nread,
|
||||
(int)sizeof(state->c)));
|
||||
tevent_req_nterror(req, NT_STATUS_UNEXPECTED_IO_ERROR);
|
||||
return;
|
||||
}
|
||||
tevent_req_done(req);
|
||||
}
|
||||
|
||||
NTSTATUS nb_packet_reader_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
|
||||
struct nb_packet_reader **preader)
|
||||
{
|
||||
struct nb_packet_reader_state *state = tevent_req_data(
|
||||
req, struct nb_packet_reader_state);
|
||||
NTSTATUS status;
|
||||
|
||||
if (tevent_req_is_nterror(req, &status)) {
|
||||
return status;
|
||||
}
|
||||
*preader = talloc_move(mem_ctx, &state->reader);
|
||||
return NT_STATUS_OK;
|
||||
}
|
||||
|
||||
struct nb_packet_read_state {
|
||||
struct nb_packet_client_header hdr;
|
||||
uint8_t *buf;
|
||||
size_t buflen;
|
||||
};
|
||||
|
||||
static ssize_t nb_packet_read_more(uint8_t *buf, size_t buflen, void *p);
|
||||
static void nb_packet_read_done(struct tevent_req *subreq);
|
||||
|
||||
struct tevent_req *nb_packet_read_send(TALLOC_CTX *mem_ctx,
|
||||
struct tevent_context *ev,
|
||||
struct nb_packet_reader *reader)
|
||||
{
|
||||
struct tevent_req *req, *subreq;
|
||||
struct nb_packet_read_state *state;
|
||||
|
||||
req = tevent_req_create(mem_ctx, &state, struct nb_packet_read_state);
|
||||
if (req == NULL) {
|
||||
return NULL;
|
||||
}
|
||||
subreq = read_packet_send(state, ev, reader->sock,
|
||||
sizeof(struct nb_packet_client_header),
|
||||
nb_packet_read_more, state);
|
||||
if (tevent_req_nomem(subreq, req)) {
|
||||
return tevent_req_post(req, ev);
|
||||
}
|
||||
tevent_req_set_callback(subreq, nb_packet_read_done, req);
|
||||
return req;
|
||||
}
|
||||
|
||||
static ssize_t nb_packet_read_more(uint8_t *buf, size_t buflen, void *p)
|
||||
{
|
||||
struct nb_packet_read_state *state = talloc_get_type_abort(
|
||||
p, struct nb_packet_read_state);
|
||||
|
||||
if (buflen > sizeof(struct nb_packet_client_header)) {
|
||||
/*
|
||||
* Been here, done
|
||||
*/
|
||||
return 0;
|
||||
}
|
||||
memcpy(&state->hdr, buf, sizeof(struct nb_packet_client_header));
|
||||
return state->hdr.len;
|
||||
}
|
||||
|
||||
static void nb_packet_read_done(struct tevent_req *subreq)
|
||||
{
|
||||
struct tevent_req *req = tevent_req_callback_data(
|
||||
subreq, struct tevent_req);
|
||||
struct nb_packet_read_state *state = tevent_req_data(
|
||||
req, struct nb_packet_read_state);
|
||||
ssize_t nread;
|
||||
int err;
|
||||
|
||||
nread = read_packet_recv(subreq, state, &state->buf, &err);
|
||||
if (nread == -1) {
|
||||
tevent_req_nterror(req, map_nt_error_from_unix(err));
|
||||
return;
|
||||
}
|
||||
state->buflen = nread;
|
||||
tevent_req_done(req);
|
||||
}
|
||||
|
||||
NTSTATUS nb_packet_read_recv(struct tevent_req *req,
|
||||
struct packet_struct **ppacket)
|
||||
{
|
||||
struct nb_packet_read_state *state = tevent_req_data(
|
||||
req, struct nb_packet_read_state);
|
||||
struct nb_packet_client_header hdr;
|
||||
struct packet_struct *packet;
|
||||
NTSTATUS status;
|
||||
|
||||
if (tevent_req_is_nterror(req, &status)) {
|
||||
return status;
|
||||
}
|
||||
|
||||
memcpy(&hdr, state->buf, sizeof(hdr));
|
||||
|
||||
packet = parse_packet(
|
||||
(char *)state->buf + sizeof(struct nb_packet_client_header),
|
||||
state->buflen - sizeof(struct nb_packet_client_header),
|
||||
state->hdr.type, state->hdr.ip, state->hdr.port);
|
||||
if (packet == NULL) {
|
||||
return NT_STATUS_INVALID_NETWORK_RESPONSE;
|
||||
}
|
||||
*ppacket = packet;
|
||||
return NT_STATUS_OK;
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user