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Remove async_req based async libsmb infrastructure

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This commit is contained in:
Volker Lendecke 2009-04-05 23:28:01 +02:00
parent 86b09e84ae
commit 64067f9204
3 changed files with 0 additions and 1006 deletions
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112
source3/include/async_smb.h
View File

@ -22,123 +22,11 @@
#include "includes.h"
/**
* struct cli_request is the state holder for an async client request we sent
* to the server. It can consist of more than one struct async_req that we
* have to server if the application did a cli_chain_cork() and
* cli_chain_uncork()
*/
struct cli_request {
/**
* "prev" and "next" form the doubly linked list in
* cli_state->outstanding_requests
*/
struct cli_request *prev, *next;
/**
* num_async: How many chained requests do we serve?
*/
int num_async;
/**
* async: This is the list of chained requests that were queued up by
* cli_request_chain before we sent out this request
*/
struct async_req **async;
/**
* The client connection for this request
*/
struct cli_state *cli;
/**
* The enc_state to decrypt the reply
*/
struct smb_trans_enc_state *enc_state;
/**
* The mid we used for this request. Mainly used to demultiplex on
* receiving replies.
*/
uint16_t mid;
uint32_t seqnum;
/**
* The bytes we have to ship to the server
*/
uint8_t *outbuf;
/**
* How much from "outbuf" did we already send
*/
size_t sent;
/**
* The reply comes in here. Its intended size is implicit by
* smb_len(), its current size can be read via talloc_get_size()
*/
char *inbuf;
/**
* Specific requests might add stuff here. Maybe convert this to a
* private_pointer at some point.
*/
union {
struct {
off_t ofs;
size_t size;
ssize_t received;
uint8_t *rcvbuf;
} read;
struct {
DATA_BLOB data;
uint16_t num_echos;
} echo;
} data;
/**
* For requests that don't follow the strict request/reply pattern
* such as the transaction request family and echo requests it is
* necessary to break the standard procedure in
* handle_incoming_pdu(). For a simple example look at
* cli_echo_recv_helper().
*/
struct {
void (*fn)(struct async_req *req);
void *priv;
} recv_helper;
};
/*
* Ship a new smb request to the server
*/
struct async_req *cli_request_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli,
uint8_t smb_command,
uint8_t additional_flags,
uint8_t wct, const uint16_t *vwv,
size_t bytes_alignment,
uint32_t num_bytes, const uint8_t *bytes);
uint16_t cli_wct_ofs(const struct cli_state *cli);
bool cli_chain_cork(struct cli_state *cli, struct event_context *ev,
size_t size_hint);
void cli_chain_uncork(struct cli_state *cli);
bool cli_in_chain(struct cli_state *cli);
bool smb_splice_chain(uint8_t **poutbuf, uint8_t smb_command,
uint8_t wct, const uint16_t *vwv,
size_t bytes_alignment,
uint32_t num_bytes, const uint8_t *bytes);
NTSTATUS cli_pull_reply(struct async_req *req,
uint8_t *pwct, uint16_t **pvwv,
uint16_t *pnum_bytes, uint8_t **pbytes);
/*
* Fetch an error out of a NBT packet
*/

25
source3/include/client.h
View File

@ -264,31 +264,6 @@ struct cli_state {
bool force_dos_errors;
bool case_sensitive; /* False by default. */
/**
* fd_event is around while we have async requests outstanding or are
* building a chained request.
*
* (fd_event!=NULL) &&
* ((outstanding_request!=NULL)||(chain_accumulator!=NULL))
*
* should always be true, as well as the reverse: If both cli_request
* pointers are NULL, no fd_event is around.
*/
struct fd_event *fd_event;
char *evt_inbuf;
/**
* A linked list of requests that are waiting for a reply
*/
struct cli_request *outstanding_requests;
/**
* The place to build up the list of chained requests. In CIFS, a
* single cli_request corresponds to a MID and can serve more than one
* chained async_req.
*/
struct cli_request *chain_accumulator;
/* Where (if anywhere) this is mounted under DFS. */
char *dfs_mountpoint;

869
source3/libsmb/async_smb.c
View File

@ -19,9 +19,6 @@
#include "includes.h"
static void cli_state_handler(struct event_context *event_ctx,
struct fd_event *event, uint16 flags, void *p);
/**
* Fetch an error out of a NBT packet
* @param[in] buf The SMB packet
@ -68,89 +65,6 @@ void cli_set_error(struct cli_state *cli, NTSTATUS status)
return;
}
/**
* Allocate a new mid
* @param[in] cli The client connection
* @retval The new, unused mid
*/
static uint16_t cli_new_mid(struct cli_state *cli)
{
uint16_t result;
struct cli_request *req;
while (true) {
result = cli->mid++;
if (result == 0) {
continue;
}
for (req = cli->outstanding_requests; req; req = req->next) {
if (result == req->mid) {
break;
}
}
if (req == NULL) {
return result;
}
}
}
/**
* Print an async req that happens to be a cli_request
* @param[in] mem_ctx The TALLOC_CTX to put the result on
* @param[in] req The request to print
* @retval The string representation of "req"
*/
static char *cli_request_print(TALLOC_CTX *mem_ctx, struct async_req *req)
{
char *result = async_req_print(mem_ctx, req);
struct cli_request *cli_req = talloc_get_type_abort(
req->private_data, struct cli_request);
if (result == NULL) {
return NULL;
}
return talloc_asprintf_append_buffer(
result, "mid=%d\n", cli_req->mid);
}
/**
* Destroy a cli_request
* @param[in] req The cli_request to kill
* @retval Can't fail
*/
static int cli_request_destructor(struct cli_request *req)
{
if (req->enc_state != NULL) {
common_free_enc_buffer(req->enc_state, (char *)req->outbuf);
}
DLIST_REMOVE(req->cli->outstanding_requests, req);
if (req->cli->outstanding_requests == NULL) {
TALLOC_FREE(req->cli->fd_event);
}
return 0;
}
/**
* Are there already requests waiting in the chain_accumulator?
* @param[in] cli The cli_state we want to check
* @retval reply :-)
*/
bool cli_in_chain(struct cli_state *cli)
{
if (cli->chain_accumulator == NULL) {
return false;
}
return (cli->chain_accumulator->num_async != 0);
}
/**
* @brief Find the smb_cmd offset of the last command pushed
* @param[in] buf The buffer we're building up
@ -325,337 +239,6 @@ bool smb_splice_chain(uint8_t **poutbuf, uint8_t smb_command,
return true;
}
/**
* @brief Destroy an async_req that is the visible part of a cli_request
* @param[in] req The request to kill
* @retval Return 0 to make talloc happy
*
* This destructor is a bit tricky: Because a cli_request can host more than
* one async_req for chained requests, we need to make sure that the
* "cli_request" that we were part of is correctly destroyed at the right
* time. This is done by NULLing out ourself from the "async" member of our
* "cli_request". If there is none left, then also TALLOC_FREE() the
* cli_request, which was a talloc child of the client connection cli_state.
*/
static int cli_async_req_destructor(struct async_req *req)
{
struct cli_request *cli_req = talloc_get_type_abort(
req->private_data, struct cli_request);
int i, pending;
bool found = false;
pending = 0;
for (i=0; i<cli_req->num_async; i++) {
if (cli_req->async[i] == req) {
cli_req->async[i] = NULL;
found = true;
}
if (cli_req->async[i] != NULL) {
pending += 1;
}
}
SMB_ASSERT(found);
if (pending == 0) {
TALLOC_FREE(cli_req);
}
return 0;
}
/**
* @brief Chain up a request
* @param[in] mem_ctx The TALLOC_CTX for the result
* @param[in] ev The event context that will call us back
* @param[in] cli The cli_state we queue the request up for
* @param[in] smb_command The command that we want to issue
* @param[in] additional_flags open_and_x wants to add oplock header flags
* @param[in] wct How many words?
* @param[in] vwv The words, already in network order
* @param[in] bytes_alignment How shall we align "bytes"?
* @param[in] num_bytes How many bytes?
* @param[in] bytes The data the request ships
*
* cli_request_chain() is the core of the SMB request marshalling routine. It
* will create a new async_req structure in the cli->chain_accumulator->async
* array and marshall the smb_cmd, the vwv array and the bytes into
* cli->chain_accumulator->outbuf.
*/
static struct async_req *cli_request_chain(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli,
uint8_t smb_command,
uint8_t additional_flags,
uint8_t wct, const uint16_t *vwv,
size_t bytes_alignment,
uint32_t num_bytes,
const uint8_t *bytes)
{
struct async_req **tmp_reqs;
struct cli_request *req;
req = cli->chain_accumulator;
tmp_reqs = TALLOC_REALLOC_ARRAY(req, req->async, struct async_req *,
req->num_async + 1);
if (tmp_reqs == NULL) {
DEBUG(0, ("talloc failed\n"));
return NULL;
}
req->async = tmp_reqs;
req->num_async += 1;
req->async[req->num_async-1] = async_req_new(mem_ctx);
if (req->async[req->num_async-1] == NULL) {
DEBUG(0, ("async_req_new failed\n"));
req->num_async -= 1;
return NULL;
}
req->async[req->num_async-1]->private_data = req;
req->async[req->num_async-1]->print = cli_request_print;
talloc_set_destructor(req->async[req->num_async-1],
cli_async_req_destructor);
if (!smb_splice_chain(&req->outbuf, smb_command, wct, vwv,
bytes_alignment, num_bytes, bytes)) {
goto fail;
}
return req->async[req->num_async-1];
fail:
TALLOC_FREE(req->async[req->num_async-1]);
req->num_async -= 1;
return NULL;
}
/**
* @brief prepare a cli_state to accept a chain of requests
* @param[in] cli The cli_state we want to queue up in
* @param[in] ev The event_context that will call us back for the socket
* @param[in] size_hint How many bytes are expected, just an optimization
* @retval Did we have enough memory?
*
* cli_chain_cork() sets up a new cli_request in cli->chain_accumulator. If
* cli is used in an async fashion, i.e. if we have outstanding requests, then
* we do not have to create a fd event. If cli is used only with the sync
* helpers, we need to create the fd_event here.
*
* If you want to issue a chained request to the server, do a
* cli_chain_cork(), then do you cli_open_send(), cli_read_and_x_send(),
* cli_close_send() and so on. The async requests that come out of
* cli_xxx_send() are normal async requests with the difference that they
* won't be shipped individually. But the event_context will still trigger the
* req->async.fn to be called on every single request.
*
* You have to take care yourself that you only issue chainable requests in
* the middle of the chain.
*/
bool cli_chain_cork(struct cli_state *cli, struct event_context *ev,
size_t size_hint)
{
struct cli_request *req = NULL;
SMB_ASSERT(cli->chain_accumulator == NULL);
if (cli->fd == -1) {
DEBUG(10, ("cli->fd closed\n"));
return false;
}
if (cli->fd_event == NULL) {
SMB_ASSERT(cli->outstanding_requests == NULL);
cli->fd_event = event_add_fd(ev, cli, cli->fd,
EVENT_FD_READ,
cli_state_handler, cli);
if (cli->fd_event == NULL) {
return false;
}
}
req = talloc(cli, struct cli_request);
if (req == NULL) {
goto fail;
}
req->cli = cli;
if (size_hint == 0) {
size_hint = 100;
}
req->outbuf = talloc_array(req, uint8_t, smb_wct + size_hint);
if (req->outbuf == NULL) {
goto fail;
}
req->outbuf = TALLOC_REALLOC_ARRAY(NULL, req->outbuf, uint8_t,
smb_wct);
req->num_async = 0;
req->async = NULL;
req->enc_state = NULL;
req->recv_helper.fn = NULL;
SSVAL(req->outbuf, smb_tid, cli->cnum);
cli_setup_packet_buf(cli, (char *)req->outbuf);
req->mid = cli_new_mid(cli);
cli->chain_accumulator = req;
DEBUG(10, ("cli_chain_cork: mid=%d\n", req->mid));
return true;
fail:
TALLOC_FREE(req);
if (cli->outstanding_requests == NULL) {
TALLOC_FREE(cli->fd_event);
}
return false;
}
/**
* Ship a request queued up via cli_request_chain()
* @param[in] cl The connection
*/
void cli_chain_uncork(struct cli_state *cli)
{
struct cli_request *req = cli->chain_accumulator;
size_t smblen;
SMB_ASSERT(req != NULL);
DLIST_ADD_END(cli->outstanding_requests, req, struct cli_request *);
talloc_set_destructor(req, cli_request_destructor);
cli->chain_accumulator = NULL;
SSVAL(req->outbuf, smb_mid, req->mid);
smblen = talloc_get_size(req->outbuf) - 4;
smb_setlen((char *)req->outbuf, smblen);
if (smblen > 0x1ffff) {
/*
* This is a POSIX 14 word large write. Overwrite just the
* size field, the '0xFFSMB' has been set by smb_setlen which
* _smb_setlen_large does not do.
*/
_smb_setlen_large(((char *)req->outbuf), smblen);
}
cli_calculate_sign_mac(cli, (char *)req->outbuf, &req->seqnum);
if (cli_encryption_on(cli)) {
NTSTATUS status;
char *enc_buf;
status = cli_encrypt_message(cli, (char *)req->outbuf,
&enc_buf);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(0, ("Error in encrypting client message. "
"Error %s\n", nt_errstr(status)));
TALLOC_FREE(req);
return;
}
req->outbuf = (uint8_t *)enc_buf;
req->enc_state = cli->trans_enc_state;
}
req->sent = 0;
event_fd_set_writeable(cli->fd_event);
}
/**
* @brief Send a request to the server
* @param[in] mem_ctx The TALLOC_CTX for the result
* @param[in] ev The event context that will call us back
* @param[in] cli The cli_state we queue the request up for
* @param[in] smb_command The command that we want to issue
* @param[in] additional_flags open_and_x wants to add oplock header flags
* @param[in] wct How many words?
* @param[in] vwv The words, already in network order
* @param[in] bytes_alignment How shall we align "bytes"?
* @param[in] num_bytes How many bytes?
* @param[in] bytes The data the request ships
*
* This is the generic routine to be used by the cli_xxx_send routines.
*/
struct async_req *cli_request_send(TALLOC_CTX *mem_ctx,
struct event_context *ev,
struct cli_state *cli,
uint8_t smb_command,
uint8_t additional_flags,
uint8_t wct, const uint16_t *vwv,
size_t bytes_alignment,
uint32_t num_bytes, const uint8_t *bytes)
{
struct async_req *result;
bool uncork = false;
if (cli->chain_accumulator == NULL) {
if (!cli_chain_cork(cli, ev,
wct * sizeof(uint16_t) + num_bytes + 3)) {
DEBUG(1, ("cli_chain_cork failed\n"));
return NULL;
}
uncork = true;
}
result = cli_request_chain(mem_ctx, ev, cli, smb_command,
additional_flags, wct, vwv, bytes_alignment,
num_bytes, bytes);
if (result == NULL) {
DEBUG(1, ("cli_request_chain failed\n"));
}
if (uncork) {
cli_chain_uncork(cli);
}
return result;
}
/**
* Calculate the current ofs to wct for requests like write&x
* @param[in] req The smb request we're currently building
* @retval how many bytes offset have we accumulated?
*/
uint16_t cli_wct_ofs(const struct cli_state *cli)
{
size_t buf_size;
if (cli->chain_accumulator == NULL) {
return smb_wct - 4;
}
buf_size = talloc_get_size(cli->chain_accumulator->outbuf);
if (buf_size == smb_wct) {
return smb_wct - 4;
}
/*
* Add alignment for subsequent requests
*/
if ((buf_size % 4) != 0) {
buf_size += (4 - (buf_size % 4));
}
return buf_size - 4;
}
/**
* Figure out if there is an andx command behind the current one
* @param[in] buf The smb buffer to look at
@ -682,458 +265,6 @@ static bool have_andx_command(const char *buf, uint16_t ofs)
return (CVAL(buf, ofs+1) != 0xff);
}
/**
* @brief Pull reply data out of a request
* @param[in] req The request that we just received a reply for
* @param[out] pwct How many words did the server send?
* @param[out] pvwv The words themselves
* @param[out] pnum_bytes How many bytes did the server send?
* @param[out] pbytes The bytes themselves
* @retval Was the reply formally correct?
*/
NTSTATUS cli_pull_reply(struct async_req *req,
uint8_t *pwct, uint16_t **pvwv,
uint16_t *pnum_bytes, uint8_t **pbytes)
{
struct cli_request *cli_req = talloc_get_type_abort(
req->private_data, struct cli_request);
uint8_t wct, cmd;
uint16_t num_bytes;
size_t wct_ofs, bytes_offset;
int i, j;
NTSTATUS status;
for (i = 0; i < cli_req->num_async; i++) {
if (req == cli_req->async[i]) {
break;
}
}
if (i == cli_req->num_async) {
cli_set_error(cli_req->cli, NT_STATUS_INVALID_PARAMETER);
return NT_STATUS_INVALID_PARAMETER;
}
/**
* The status we pull here is only relevant for the last reply in the
* chain.
*/
status = cli_pull_error(cli_req->inbuf);
if (i == 0) {
if (NT_STATUS_IS_ERR(status)
&& !have_andx_command(cli_req->inbuf, smb_wct)) {
cli_set_error(cli_req->cli, status);
return status;
}
wct_ofs = smb_wct;
goto done;
}
cmd = CVAL(cli_req->inbuf, smb_com);
wct_ofs = smb_wct;
for (j = 0; j < i; j++) {
if (j < i-1) {
if (cmd == 0xff) {
return NT_STATUS_REQUEST_ABORTED;
}
if (!is_andx_req(cmd)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
}
if (!have_andx_command(cli_req->inbuf, wct_ofs)) {
/*
* This request was not completed because a previous
* request in the chain had received an error.
*/
return NT_STATUS_REQUEST_ABORTED;
}
wct_ofs = SVAL(cli_req->inbuf, wct_ofs + 3);
/*
* Skip the all-present length field. No overflow, we've just
* put a 16-bit value into a size_t.
*/
wct_ofs += 4;
if (wct_ofs+2 > talloc_get_size(cli_req->inbuf)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
cmd = CVAL(cli_req->inbuf, wct_ofs + 1);
}
if (!have_andx_command(cli_req->inbuf, wct_ofs)
&& NT_STATUS_IS_ERR(status)) {
/*
* The last command takes the error code. All further commands
* down the requested chain will get a
* NT_STATUS_REQUEST_ABORTED.
*/
return status;
}
done:
wct = CVAL(cli_req->inbuf, wct_ofs);
bytes_offset = wct_ofs + 1 + wct * sizeof(uint16_t);
num_bytes = SVAL(cli_req->inbuf, bytes_offset);
/*
* wct_ofs is a 16-bit value plus 4, wct is a 8-bit value, num_bytes
* is a 16-bit value. So bytes_offset being size_t should be far from
* wrapping.
*/
if ((bytes_offset + 2 > talloc_get_size(cli_req->inbuf))
|| (bytes_offset > 0xffff)) {
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
*pwct = wct;
*pvwv = (uint16_t *)(cli_req->inbuf + wct_ofs + 1);
*pnum_bytes = num_bytes;
*pbytes = (uint8_t *)cli_req->inbuf + bytes_offset + 2;
return NT_STATUS_OK;
}
/**
* Decrypt a PDU, check the signature
* @param[in] cli The cli_state that received something
* @param[in] pdu The incoming bytes
* @retval error code
*/
static NTSTATUS validate_smb_crypto(struct cli_state *cli, char *pdu,
struct cli_request **_req,
uint16_t *_mid)
{
NTSTATUS status;
struct cli_request *req = NULL;
uint16_t mid;
*_req = NULL;
*_mid = 0;
if ((IVAL(pdu, 4) != 0x424d53ff) /* 0xFF"SMB" */
&& (SVAL(pdu, 4) != 0x45ff)) /* 0xFF"E" */ {
DEBUG(10, ("Got non-SMB PDU\n"));
return NT_STATUS_INVALID_NETWORK_RESPONSE;
}
if (cli_encryption_on(cli) && CVAL(pdu, 0) == 0) {
uint16_t enc_ctx_num;
status = get_enc_ctx_num((uint8_t *)pdu, &enc_ctx_num);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("get_enc_ctx_num returned %s\n",
nt_errstr(status)));
return status;
}
if (enc_ctx_num != cli->trans_enc_state->enc_ctx_num) {
DEBUG(10, ("wrong enc_ctx %d, expected %d\n",
enc_ctx_num,
cli->trans_enc_state->enc_ctx_num));
return NT_STATUS_INVALID_HANDLE;
}
status = common_decrypt_buffer(cli->trans_enc_state, pdu);
if (!NT_STATUS_IS_OK(status)) {
DEBUG(10, ("common_decrypt_buffer returned %s\n",
nt_errstr(status)));
return status;
}
}
mid = SVAL(pdu, smb_mid);
for (req = cli->outstanding_requests; req; req = req->next) {
if (req->mid == mid) {
break;
}
}
if (!req) {
/* oplock breaks are not signed */
goto done;
}
if (!cli_check_sign_mac(cli, pdu, req->seqnum+1)) {
DEBUG(10, ("cli_check_sign_mac failed\n"));
return NT_STATUS_ACCESS_DENIED;
}
done:
*_req = req;
*_mid = mid;
return NT_STATUS_OK;
}
/**
* A PDU has arrived on cli->evt_inbuf
* @param[in] cli The cli_state that received something
*/
static void handle_incoming_pdu(struct cli_state *cli)
{
struct cli_request *req, *next;
uint16_t mid;
size_t raw_pdu_len, buf_len, rest_len;
char *pdu;
int i;
NTSTATUS status;
int num_async;
/*
* The encrypted PDU len might differ from the unencrypted one
*/
raw_pdu_len = smb_len(cli->evt_inbuf) + 4;
buf_len = talloc_get_size(cli->evt_inbuf);
rest_len = buf_len - raw_pdu_len;
if (buf_len == raw_pdu_len) {
/*
* Optimal case: Exactly one PDU was in the socket buffer
*/
pdu = cli->evt_inbuf;
cli->evt_inbuf = NULL;
}
else {
DEBUG(11, ("buf_len = %d, raw_pdu_len = %d, splitting "
"buffer\n", (int)buf_len, (int)raw_pdu_len));
if (raw_pdu_len < rest_len) {
/*
* The PDU is shorter, talloc_memdup that one.
*/
pdu = (char *)talloc_memdup(
cli, cli->evt_inbuf, raw_pdu_len);
memmove(cli->evt_inbuf, cli->evt_inbuf + raw_pdu_len,
buf_len - raw_pdu_len);
cli->evt_inbuf = TALLOC_REALLOC_ARRAY(
NULL, cli->evt_inbuf, char, rest_len);
if (pdu == NULL) {
status = NT_STATUS_NO_MEMORY;
goto invalidate_requests;
}
}
else {
/*
* The PDU is larger than the rest, talloc_memdup the
* rest
*/
pdu = cli->evt_inbuf;
cli->evt_inbuf = (char *)talloc_memdup(
cli, pdu + raw_pdu_len, rest_len);
if (cli->evt_inbuf == NULL) {
status = NT_STATUS_NO_MEMORY;
goto invalidate_requests;
}
}
}
status = validate_smb_crypto(cli, pdu, &req, &mid);
if (!NT_STATUS_IS_OK(status)) {
goto invalidate_requests;
}
DEBUG(10, ("handle_incoming_pdu: got mid %d\n", mid));
if (req == NULL) {
DEBUG(3, ("Request for mid %d not found, dumping PDU\n", mid));
TALLOC_FREE(pdu);
return;
}
req->inbuf = talloc_move(req, &pdu);
/*
* Freeing the last async_req will free the req (see
* cli_async_req_destructor). So make a copy of req->num_async, we
* can't reference it in the last round.
*/
num_async = req->num_async;
for (i=0; i<num_async; i++) {
/**
* A request might have been talloc_free()'ed before we arrive
* here. It will have removed itself from req->async via its
* destructor cli_async_req_destructor().
*/
if (req->async[i] != NULL) {
if (req->recv_helper.fn != NULL) {
req->recv_helper.fn(req->async[i]);
} else {
async_req_done(req->async[i]);
}
}
}
return;
invalidate_requests:
DEBUG(10, ("handle_incoming_pdu: Aborting with %s\n",
nt_errstr(status)));
for (req = cli->outstanding_requests; req; req = next) {
next = req->next;
if (req->num_async) {
async_req_nterror(req->async[0], status);
}
}
return;
}
/**
* fd event callback. This is the basic connection to the socket
* @param[in] event_ctx The event context that called us
* @param[in] event The event that fired
* @param[in] flags EVENT_FD_READ | EVENT_FD_WRITE
* @param[in] p private_data, in this case the cli_state
*/
static void cli_state_handler(struct event_context *event_ctx,
struct fd_event *event, uint16 flags, void *p)
{
struct cli_state *cli = (struct cli_state *)p;
struct cli_request *req, *next;
NTSTATUS status;
DEBUG(11, ("cli_state_handler called with flags %d\n", flags));
if (flags & EVENT_FD_WRITE) {
size_t to_send;
ssize_t sent;
for (req = cli->outstanding_requests; req; req = req->next) {
to_send = smb_len(req->outbuf)+4;
if (to_send > req->sent) {
break;
}
}
if (req == NULL) {
if (cli->fd_event != NULL) {
event_fd_set_not_writeable(cli->fd_event);
}
return;
}
sent = sys_send(cli->fd, req->outbuf + req->sent,
to_send - req->sent, 0);
if (sent < 0) {
status = map_nt_error_from_unix(errno);
goto sock_error;
}
req->sent += sent;
if (req->sent == to_send) {
return;
}
}
if (flags & EVENT_FD_READ) {
int res, available;
size_t old_size, new_size;
char *tmp;
res = ioctl(cli->fd, FIONREAD, &available);
if (res == -1) {
DEBUG(10, ("ioctl(FIONREAD) failed: %s\n",
strerror(errno)));
status = map_nt_error_from_unix(errno);
goto sock_error;
}
if (available == 0) {
/* EOF */
status = NT_STATUS_END_OF_FILE;
goto sock_error;
}
old_size = talloc_get_size(cli->evt_inbuf);
new_size = old_size + available;
if (new_size < old_size) {
/* wrap */
status = NT_STATUS_UNEXPECTED_IO_ERROR;
goto sock_error;
}
tmp = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf, char,
new_size);
if (tmp == NULL) {
/* nomem */
status = NT_STATUS_NO_MEMORY;
goto sock_error;
}
cli->evt_inbuf = tmp;
res = sys_recv(cli->fd, cli->evt_inbuf + old_size, available, 0);
if (res == -1) {
DEBUG(10, ("recv failed: %s\n", strerror(errno)));
status = map_nt_error_from_unix(errno);
goto sock_error;
}
DEBUG(11, ("cli_state_handler: received %d bytes, "
"smb_len(evt_inbuf) = %d\n", (int)res,
smb_len(cli->evt_inbuf)));
/* recv *might* have returned less than announced */
new_size = old_size + res;
/* shrink, so I don't expect errors here */
cli->evt_inbuf = TALLOC_REALLOC_ARRAY(cli, cli->evt_inbuf,
char, new_size);
while ((cli->evt_inbuf != NULL)
&& ((smb_len(cli->evt_inbuf) + 4) <= new_size)) {
/*
* we've got a complete NBT level PDU in evt_inbuf
*/
handle_incoming_pdu(cli);
new_size = talloc_get_size(cli->evt_inbuf);
}
}
return;
sock_error:
for (req = cli->outstanding_requests; req; req = next) {
int i, num_async;
next = req->next;
num_async = req->num_async;
for (i=0; i<num_async; i++) {
async_req_nterror(req->async[i], status);
}
}
TALLOC_FREE(cli->fd_event);
close(cli->fd);
cli->fd = -1;
}
#define MAX_SMB_IOV 5
struct cli_smb_state {