async socket syscalls
Copyright (C) Volker Lendecke 2008
- 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.
+ ** NOTE! The following LGPL license applies to the async_sock
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
- This program is distributed in the hope that it will be useful,
+ This library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 3 of the License, or (at your option) any later version.
+
+ This library 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.
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
- You should have received a copy of the GNU General Public License
+ You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-#include "includes.h"
-#include "lib/talloc/talloc.h"
-#include "lib/tevent/tevent.h"
-#include "lib/async_req/async_req.h"
+#include "replace.h"
+#include "system/network.h"
+#include "system/filesys.h"
+#include <talloc.h>
+#include <tevent.h>
#include "lib/async_req/async_sock.h"
+
+/* Note: lib/util/ is currently GPL */
#include "lib/util/tevent_unix.h"
-#include <fcntl.h>
+#include "lib/util/samba_util.h"
#ifndef TALLOC_FREE
#define TALLOC_FREE(ctx) do { talloc_free(ctx); ctx=NULL; } while(0)
#endif
-/**
- * Discriminator for async_syscall_state
- */
-enum async_syscall_type {
- ASYNC_SYSCALL_SEND,
- ASYNC_SYSCALL_RECV,
-};
-
-/**
- * Holder for syscall arguments and the result
- */
-
-struct async_syscall_state {
- enum async_syscall_type syscall_type;
- struct tevent_fd *fde;
-
- union {
- struct param_send {
- int fd;
- const void *buffer;
- size_t length;
- int flags;
- } param_send;
- struct param_recv {
- int fd;
- void *buffer;
- size_t length;
- int flags;
- } param_recv;
- } param;
-
- union {
- ssize_t result_ssize_t;
- size_t result_size_t;
- int result_int;
- } result;
- int sys_errno;
+struct sendto_state {
+ int fd;
+ const void *buf;
+ size_t len;
+ int flags;
+ const struct sockaddr_storage *addr;
+ socklen_t addr_len;
+ ssize_t sent;
};
-/**
- * @brief Map async_req states to unix-style errnos
- * @param[in] req The async req to get the state from
- * @param[out] err Pointer to take the unix-style errno
- *
- * @return true if the async_req is in an error state, false otherwise
- */
+static void sendto_handler(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags, void *private_data);
-bool async_req_is_errno(struct async_req *req, int *err)
+struct tevent_req *sendto_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
+ int fd, const void *buf, size_t len, int flags,
+ const struct sockaddr_storage *addr)
{
- enum async_req_state state;
- uint64_t error;
+ struct tevent_req *result;
+ struct sendto_state *state;
+ struct tevent_fd *fde;
- if (!async_req_is_error(req, &state, &error)) {
- return false;
+ result = tevent_req_create(mem_ctx, &state, struct sendto_state);
+ if (result == NULL) {
+ return result;
}
+ state->fd = fd;
+ state->buf = buf;
+ state->len = len;
+ state->flags = flags;
+ state->addr = addr;
- switch (state) {
- case ASYNC_REQ_USER_ERROR:
- *err = (int)error;
+ switch (addr->ss_family) {
+ case AF_INET:
+ state->addr_len = sizeof(struct sockaddr_in);
break;
- case ASYNC_REQ_TIMED_OUT:
-#ifdef ETIMEDOUT
- *err = ETIMEDOUT;
-#else
- *err = EAGAIN;
-#endif
+#if defined(HAVE_IPV6)
+ case AF_INET6:
+ state->addr_len = sizeof(struct sockaddr_in6);
break;
- case ASYNC_REQ_NO_MEMORY:
- *err = ENOMEM;
+#endif
+ case AF_UNIX:
+ state->addr_len = sizeof(struct sockaddr_un);
break;
default:
- *err = EIO;
+ state->addr_len = sizeof(struct sockaddr_storage);
break;
}
- return true;
-}
-
-int async_req_simple_recv_errno(struct async_req *req)
-{
- int err;
-
- if (async_req_is_errno(req, &err)) {
- return err;
- }
-
- return 0;
-}
-
-/**
- * @brief Create a new async syscall req
- * @param[in] mem_ctx The memory context to hang the result off
- * @param[in] ev The event context to work from
- * @param[in] type Which syscall will this be
- * @param[in] pstate Where to put the newly created private_data state
- * @retval The new request
- *
- * This is a helper function to prepare a new struct async_req with an
- * associated struct async_syscall_state. The async_syscall_state will be put
- * into the async_req as private_data.
- */
-
-static struct async_req *async_syscall_new(TALLOC_CTX *mem_ctx,
- struct tevent_context *ev,
- enum async_syscall_type type,
- struct async_syscall_state **pstate)
-{
- struct async_req *result;
- struct async_syscall_state *state;
-
- if (!async_req_setup(mem_ctx, &result, &state,
- struct async_syscall_state)) {
- return NULL;
- }
- state->syscall_type = type;
-
- result->private_data = state;
-
- *pstate = state;
-
- return result;
-}
-
-/**
- * @brief Create a new async syscall req based on a fd
- * @param[in] mem_ctx The memory context to hang the result off
- * @param[in] ev The event context to work from
- * @param[in] type Which syscall will this be
- * @param[in] fd The file descriptor we work on
- * @param[in] fde_flags TEVENT_FD_READ/WRITE -- what are we interested in?
- * @param[in] fde_cb The callback function for the file descriptor event
- * @param[in] pstate Where to put the newly created private_data state
- * @retval The new request
- *
- * This is a helper function to prepare a new struct async_req with an
- * associated struct async_syscall_state and an associated file descriptor
- * event.
- */
-
-static struct async_req *async_fde_syscall_new(
- TALLOC_CTX *mem_ctx,
- struct tevent_context *ev,
- enum async_syscall_type type,
- int fd,
- uint16_t fde_flags,
- void (*fde_cb)(struct tevent_context *ev,
- struct tevent_fd *fde, uint16_t flags,
- void *priv),
- struct async_syscall_state **pstate)
-{
- struct async_req *result;
- struct async_syscall_state *state;
-
- result = async_syscall_new(mem_ctx, ev, type, &state);
- if (result == NULL) {
- return NULL;
- }
- state->fde = tevent_add_fd(ev, state, fd, fde_flags, fde_cb, result);
- if (state->fde == NULL) {
+ fde = tevent_add_fd(ev, state, fd, TEVENT_FD_WRITE, sendto_handler,
+ result);
+ if (fde == NULL) {
TALLOC_FREE(result);
return NULL;
}
- *pstate = state;
return result;
}
-/**
- * Retrieve a ssize_t typed result from an async syscall
- * @param[in] req The syscall that has just finished
- * @param[out] perrno Where to put the syscall's errno
- * @retval The return value from the asynchronously called syscall
- */
-
-ssize_t async_syscall_result_ssize_t(struct async_req *req, int *perrno)
-{
- struct async_syscall_state *state = talloc_get_type_abort(
- req->private_data, struct async_syscall_state);
-
- *perrno = state->sys_errno;
- return state->result.result_ssize_t;
-}
-
-/**
- * Retrieve a size_t typed result from an async syscall
- * @param[in] req The syscall that has just finished
- * @param[out] perrno Where to put the syscall's errno
- * @retval The return value from the asynchronously called syscall
- */
-
-size_t async_syscall_result_size_t(struct async_req *req, int *perrno)
-{
- struct async_syscall_state *state = talloc_get_type_abort(
- req->private_data, struct async_syscall_state);
-
- *perrno = state->sys_errno;
- return state->result.result_size_t;
-}
-
-/**
- * Retrieve a int typed result from an async syscall
- * @param[in] req The syscall that has just finished
- * @param[out] perrno Where to put the syscall's errno
- * @retval The return value from the asynchronously called syscall
- */
-
-int async_syscall_result_int(struct async_req *req, int *perrno)
-{
- struct async_syscall_state *state = talloc_get_type_abort(
- req->private_data, struct async_syscall_state);
-
- *perrno = state->sys_errno;
- return state->result.result_int;
-}
-
-/**
- * fde event handler for the "send" syscall
- * @param[in] ev The event context that sent us here
- * @param[in] fde The file descriptor event associated with the send
- * @param[in] flags Can only be TEVENT_FD_WRITE here
- * @param[in] priv private data, "struct async_req *" in this case
- */
-
-static void async_send_callback(struct tevent_context *ev,
- struct tevent_fd *fde, uint16_t flags,
- void *priv)
+static void sendto_handler(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags, void *private_data)
{
- struct async_req *req = talloc_get_type_abort(
- priv, struct async_req);
- struct async_syscall_state *state = talloc_get_type_abort(
- req->private_data, struct async_syscall_state);
- struct param_send *p = &state->param.param_send;
-
- if (state->syscall_type != ASYNC_SYSCALL_SEND) {
- async_req_error(req, EIO);
+ struct tevent_req *req = talloc_get_type_abort(
+ private_data, struct tevent_req);
+ struct sendto_state *state =
+ tevent_req_data(req, struct sendto_state);
+
+ state->sent = sendto(state->fd, state->buf, state->len, state->flags,
+ (const struct sockaddr *)state->addr,
+ state->addr_len);
+ if ((state->sent == -1) && (errno == EINTR)) {
+ /* retry */
return;
}
-
- state->result.result_ssize_t = send(p->fd, p->buffer, p->length,
- p->flags);
- state->sys_errno = errno;
-
- TALLOC_FREE(state->fde);
-
- async_req_done(req);
-}
-
-/**
- * Async version of send(2)
- * @param[in] mem_ctx The memory context to hang the result off
- * @param[in] ev The event context to work from
- * @param[in] fd The socket to send to
- * @param[in] buffer The buffer to send
- * @param[in] length How many bytes to send
- * @param[in] flags flags passed to send(2)
- *
- * This function is a direct counterpart of send(2)
- */
-
-struct async_req *async_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
- int fd, const void *buffer, size_t length,
- int flags)
-{
- struct async_req *result;
- struct async_syscall_state *state;
-
- result = async_fde_syscall_new(
- mem_ctx, ev, ASYNC_SYSCALL_SEND,
- fd, TEVENT_FD_WRITE, async_send_callback,
- &state);
- if (result == NULL) {
- return NULL;
- }
-
- state->param.param_send.fd = fd;
- state->param.param_send.buffer = buffer;
- state->param.param_send.length = length;
- state->param.param_send.flags = flags;
-
- return result;
-}
-
-/**
- * fde event handler for the "recv" syscall
- * @param[in] ev The event context that sent us here
- * @param[in] fde The file descriptor event associated with the recv
- * @param[in] flags Can only be TEVENT_FD_READ here
- * @param[in] priv private data, "struct async_req *" in this case
- */
-
-static void async_recv_callback(struct tevent_context *ev,
- struct tevent_fd *fde, uint16_t flags,
- void *priv)
-{
- struct async_req *req = talloc_get_type_abort(
- priv, struct async_req);
- struct async_syscall_state *state = talloc_get_type_abort(
- req->private_data, struct async_syscall_state);
- struct param_recv *p = &state->param.param_recv;
-
- if (state->syscall_type != ASYNC_SYSCALL_RECV) {
- async_req_error(req, EIO);
+ if (state->sent == -1) {
+ tevent_req_error(req, errno);
return;
}
-
- state->result.result_ssize_t = recv(p->fd, p->buffer, p->length,
- p->flags);
- state->sys_errno = errno;
-
- TALLOC_FREE(state->fde);
-
- async_req_done(req);
+ tevent_req_done(req);
}
-/**
- * Async version of recv(2)
- * @param[in] mem_ctx The memory context to hang the result off
- * @param[in] ev The event context to work from
- * @param[in] fd The socket to recv from
- * @param[in] buffer The buffer to recv into
- * @param[in] length How many bytes to recv
- * @param[in] flags flags passed to recv(2)
- *
- * This function is a direct counterpart of recv(2)
- */
-
-struct async_req *async_recv(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
- int fd, void *buffer, size_t length,
- int flags)
+ssize_t sendto_recv(struct tevent_req *req, int *perrno)
{
- struct async_req *result;
- struct async_syscall_state *state;
-
- result = async_fde_syscall_new(
- mem_ctx, ev, ASYNC_SYSCALL_RECV,
- fd, TEVENT_FD_READ, async_recv_callback,
- &state);
+ struct sendto_state *state =
+ tevent_req_data(req, struct sendto_state);
- if (result == NULL) {
- return NULL;
+ if (tevent_req_is_unix_error(req, perrno)) {
+ return -1;
}
-
- state->param.param_recv.fd = fd;
- state->param.param_recv.buffer = buffer;
- state->param.param_recv.length = length;
- state->param.param_recv.flags = flags;
-
- return result;
+ return state->sent;
}
-struct async_send_state {
+struct recvfrom_state {
int fd;
- const void *buf;
+ void *buf;
size_t len;
int flags;
- ssize_t sent;
+ struct sockaddr_storage *addr;
+ socklen_t *addr_len;
+ ssize_t received;
};
-static void async_send_handler(struct tevent_context *ev,
+static void recvfrom_handler(struct tevent_context *ev,
struct tevent_fd *fde,
uint16_t flags, void *private_data);
-struct tevent_req *async_send_send(TALLOC_CTX *mem_ctx,
- struct tevent_context *ev,
- int fd, const void *buf, size_t len,
- int flags)
+struct tevent_req *recvfrom_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ int fd, void *buf, size_t len, int flags,
+ struct sockaddr_storage *addr,
+ socklen_t *addr_len)
{
struct tevent_req *result;
- struct async_send_state *state;
+ struct recvfrom_state *state;
struct tevent_fd *fde;
- result = tevent_req_create(mem_ctx, &state, struct async_send_state);
+ result = tevent_req_create(mem_ctx, &state, struct recvfrom_state);
if (result == NULL) {
return result;
}
state->buf = buf;
state->len = len;
state->flags = flags;
+ state->addr = addr;
+ state->addr_len = addr_len;
- fde = tevent_add_fd(ev, state, fd, TEVENT_FD_WRITE, async_send_handler,
+ fde = tevent_add_fd(ev, state, fd, TEVENT_FD_READ, recvfrom_handler,
result);
if (fde == NULL) {
TALLOC_FREE(result);
return result;
}
-static void async_send_handler(struct tevent_context *ev,
+static void recvfrom_handler(struct tevent_context *ev,
struct tevent_fd *fde,
uint16_t flags, void *private_data)
{
struct tevent_req *req = talloc_get_type_abort(
private_data, struct tevent_req);
- struct async_send_state *state = talloc_get_type_abort(
- req->private_state, struct async_send_state);
-
- state->sent = send(state->fd, state->buf, state->len, state->flags);
- if (state->sent == -1) {
+ struct recvfrom_state *state =
+ tevent_req_data(req, struct recvfrom_state);
+
+ state->received = recvfrom(state->fd, state->buf, state->len,
+ state->flags, (struct sockaddr *)state->addr,
+ state->addr_len);
+ if ((state->received == -1) && (errno == EINTR)) {
+ /* retry */
+ return;
+ }
+ if (state->received == 0) {
+ tevent_req_error(req, EPIPE);
+ return;
+ }
+ if (state->received == -1) {
tevent_req_error(req, errno);
return;
}
tevent_req_done(req);
}
-ssize_t async_send_recv(struct tevent_req *req, int *perrno)
+ssize_t recvfrom_recv(struct tevent_req *req, int *perrno)
{
- struct async_send_state *state = talloc_get_type_abort(
- req->private_state, struct async_send_state);
+ struct recvfrom_state *state =
+ tevent_req_data(req, struct recvfrom_state);
if (tevent_req_is_unix_error(req, perrno)) {
return -1;
}
- return state->sent;
+ return state->received;
}
struct async_connect_state {
int result;
int sys_errno;
long old_sockflags;
+ socklen_t address_len;
+ struct sockaddr_storage address;
};
static void async_connect_connected(struct tevent_context *ev,
goto post_errno;
}
+ state->address_len = address_len;
+ if (address_len > sizeof(state->address)) {
+ errno = EINVAL;
+ goto post_errno;
+ }
+ memcpy(&state->address, address, address_len);
+
set_blocking(fd, false);
state->result = connect(fd, address, address_len);
if (state->result == 0) {
- errno = 0;
- goto post_errno;
+ tevent_req_done(result);
+ goto done;
}
/**
errno == EISCONN ||
#endif
errno == EAGAIN || errno == EINTR)) {
+ state->sys_errno = errno;
goto post_errno;
}
fde = tevent_add_fd(ev, state, fd, TEVENT_FD_READ | TEVENT_FD_WRITE,
async_connect_connected, result);
if (fde == NULL) {
- errno = ENOMEM;
+ state->sys_errno = ENOMEM;
goto post_errno;
}
return result;
post_errno:
- state->sys_errno = errno;
+ tevent_req_error(result, state->sys_errno);
+ done:
fcntl(fd, F_SETFL, state->old_sockflags);
- if (state->sys_errno == 0) {
- tevent_req_done(result);
- } else {
- tevent_req_error(result, state->sys_errno);
- }
return tevent_req_post(result, ev);
}
{
struct tevent_req *req = talloc_get_type_abort(
priv, struct tevent_req);
- struct async_connect_state *state = talloc_get_type_abort(
- req->private_state, struct async_connect_state);
-
- TALLOC_FREE(fde);
-
- /*
- * Stevens, Network Programming says that if there's a
- * successful connect, the socket is only writable. Upon an
- * error, it's both readable and writable.
- */
- if ((flags & (TEVENT_FD_READ|TEVENT_FD_WRITE))
- == (TEVENT_FD_READ|TEVENT_FD_WRITE)) {
- int sockerr;
- socklen_t err_len = sizeof(sockerr);
-
- if (getsockopt(state->fd, SOL_SOCKET, SO_ERROR,
- (void *)&sockerr, &err_len) == 0) {
- errno = sockerr;
- }
-
- state->sys_errno = errno;
-
- DEBUG(10, ("connect returned %s\n", strerror(errno)));
-
- fcntl(state->fd, F_SETFL, state->old_sockflags);
- tevent_req_error(req, state->sys_errno);
+ struct async_connect_state *state =
+ tevent_req_data(req, struct async_connect_state);
+ int ret;
+
+ ret = connect(state->fd, (struct sockaddr *)(void *)&state->address,
+ state->address_len);
+ if (ret == 0) {
+ state->sys_errno = 0;
+ TALLOC_FREE(fde);
+ tevent_req_done(req);
return;
}
-
- state->sys_errno = 0;
- tevent_req_done(req);
+ if (errno == EINPROGRESS) {
+ /* Try again later, leave the fde around */
+ return;
+ }
+ state->sys_errno = errno;
+ TALLOC_FREE(fde);
+ tevent_req_error(req, errno);
+ return;
}
int async_connect_recv(struct tevent_req *req, int *perrno)
{
- struct async_connect_state *state = talloc_get_type_abort(
- req->private_state, struct async_connect_state);
+ struct async_connect_state *state =
+ tevent_req_data(req, struct async_connect_state);
int err;
fcntl(state->fd, F_SETFL, state->old_sockflags);
struct iovec *iov;
int count;
size_t total_size;
+ uint16_t flags;
+ bool err_on_readability;
};
+static void writev_trigger(struct tevent_req *req, void *private_data);
static void writev_handler(struct tevent_context *ev, struct tevent_fd *fde,
uint16_t flags, void *private_data);
struct tevent_req *writev_send(TALLOC_CTX *mem_ctx, struct tevent_context *ev,
- int fd, struct iovec *iov, int count)
+ struct tevent_queue *queue, int fd,
+ bool err_on_readability,
+ struct iovec *iov, int count)
{
- struct tevent_req *result;
+ struct tevent_req *req;
struct writev_state *state;
- struct tevent_fd *fde;
- result = tevent_req_create(mem_ctx, &state, struct writev_state);
- if (result == NULL) {
+ req = tevent_req_create(mem_ctx, &state, struct writev_state);
+ if (req == NULL) {
return NULL;
}
state->ev = ev;
if (state->iov == NULL) {
goto fail;
}
+ state->flags = TEVENT_FD_WRITE|TEVENT_FD_READ;
+ state->err_on_readability = err_on_readability;
- fde = tevent_add_fd(ev, state, fd, TEVENT_FD_WRITE, writev_handler,
- result);
- if (fde == NULL) {
- goto fail;
+ if (queue == NULL) {
+ struct tevent_fd *fde;
+ fde = tevent_add_fd(state->ev, state, state->fd,
+ state->flags, writev_handler, req);
+ if (tevent_req_nomem(fde, req)) {
+ return tevent_req_post(req, ev);
+ }
+ return req;
}
- return result;
+ if (!tevent_queue_add(queue, ev, req, writev_trigger, NULL)) {
+ goto fail;
+ }
+ return req;
fail:
- TALLOC_FREE(result);
+ TALLOC_FREE(req);
return NULL;
}
+static void writev_trigger(struct tevent_req *req, void *private_data)
+{
+ struct writev_state *state = tevent_req_data(req, struct writev_state);
+ struct tevent_fd *fde;
+
+ fde = tevent_add_fd(state->ev, state, state->fd, state->flags,
+ writev_handler, req);
+ if (fde == NULL) {
+ tevent_req_error(req, ENOMEM);
+ }
+}
+
static void writev_handler(struct tevent_context *ev, struct tevent_fd *fde,
uint16_t flags, void *private_data)
{
struct tevent_req *req = talloc_get_type_abort(
private_data, struct tevent_req);
- struct writev_state *state = talloc_get_type_abort(
- req->private_state, struct writev_state);
+ struct writev_state *state =
+ tevent_req_data(req, struct writev_state);
size_t to_write, written;
int i;
to_write = 0;
+ if ((state->flags & TEVENT_FD_READ) && (flags & TEVENT_FD_READ)) {
+ int ret, value;
+
+ if (state->err_on_readability) {
+ /* Readable and the caller wants an error on read. */
+ tevent_req_error(req, EPIPE);
+ return;
+ }
+
+ /* Might be an error. Check if there are bytes to read */
+ ret = ioctl(state->fd, FIONREAD, &value);
+ /* FIXME - should we also check
+ for ret == 0 and value == 0 here ? */
+ if (ret == -1) {
+ /* There's an error. */
+ tevent_req_error(req, EPIPE);
+ return;
+ }
+ /* A request for TEVENT_FD_READ will succeed from now and
+ forevermore until the bytes are read so if there was
+ an error we'll wait until we do read, then get it in
+ the read callback function. Until then, remove TEVENT_FD_READ
+ from the flags we're waiting for. */
+ state->flags &= ~TEVENT_FD_READ;
+ TEVENT_FD_NOT_READABLE(fde);
+
+ /* If not writable, we're done. */
+ if (!(flags & TEVENT_FD_WRITE)) {
+ return;
+ }
+ }
+
for (i=0; i<state->count; i++) {
to_write += state->iov[i].iov_len;
}
- written = sys_writev(state->fd, state->iov, state->count);
+ written = writev(state->fd, state->iov, state->count);
+ if ((written == -1) && (errno == EINTR)) {
+ /* retry */
+ return;
+ }
if (written == -1) {
tevent_req_error(req, errno);
return;
state->iov[0].iov_len -= written;
break;
}
- written = state->iov[0].iov_len;
+ written -= state->iov[0].iov_len;
state->iov += 1;
state->count -= 1;
}
ssize_t writev_recv(struct tevent_req *req, int *perrno)
{
- struct writev_state *state = talloc_get_type_abort(
- req->private_state, struct writev_state);
+ struct writev_state *state =
+ tevent_req_data(req, struct writev_state);
if (tevent_req_is_unix_error(req, perrno)) {
return -1;
{
struct tevent_req *req = talloc_get_type_abort(
private_data, struct tevent_req);
- struct read_packet_state *state = talloc_get_type_abort(
- req->private_state, struct read_packet_state);
+ struct read_packet_state *state =
+ tevent_req_data(req, struct read_packet_state);
size_t total = talloc_get_size(state->buf);
ssize_t nread, more;
uint8_t *tmp;
- nread = read(state->fd, state->buf+state->nread, total-state->nread);
+ nread = recv(state->fd, state->buf+state->nread, total-state->nread,
+ 0);
+ if ((nread == -1) && (errno == ENOTSOCK)) {
+ nread = read(state->fd, state->buf+state->nread,
+ total-state->nread);
+ }
+ if ((nread == -1) && (errno == EINTR)) {
+ /* retry */
+ return;
+ }
if (nread == -1) {
tevent_req_error(req, errno);
return;
return;
}
- tmp = TALLOC_REALLOC_ARRAY(state, state->buf, uint8_t, total+more);
+ tmp = talloc_realloc(state, state->buf, uint8_t, total+more);
if (tevent_req_nomem(tmp, req)) {
return;
}
ssize_t read_packet_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
uint8_t **pbuf, int *perrno)
{
- struct read_packet_state *state = talloc_get_type_abort(
- req->private_state, struct read_packet_state);
+ struct read_packet_state *state =
+ tevent_req_data(req, struct read_packet_state);
if (tevent_req_is_unix_error(req, perrno)) {
return -1;
*pbuf = talloc_move(mem_ctx, &state->buf);
return talloc_get_size(*pbuf);
}
+
+struct wait_for_read_state {
+ struct tevent_req *req;
+ struct tevent_fd *fde;
+};
+
+static void wait_for_read_done(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags,
+ void *private_data);
+
+struct tevent_req *wait_for_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ int fd)
+{
+ struct tevent_req *req;
+ struct wait_for_read_state *state;
+
+ req = tevent_req_create(mem_ctx, &state, struct wait_for_read_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->req = req;
+ state->fde = tevent_add_fd(ev, state, fd, TEVENT_FD_READ,
+ wait_for_read_done, state);
+ if (tevent_req_nomem(state->fde, req)) {
+ return tevent_req_post(req, ev);
+ }
+ return req;
+}
+
+static void wait_for_read_done(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags,
+ void *private_data)
+{
+ struct wait_for_read_state *state = talloc_get_type_abort(
+ private_data, struct wait_for_read_state);
+
+ if (flags & TEVENT_FD_READ) {
+ TALLOC_FREE(state->fde);
+ tevent_req_done(state->req);
+ }
+}
+
+bool wait_for_read_recv(struct tevent_req *req, int *perr)
+{
+ int err;
+
+ if (tevent_req_is_unix_error(req, &err)) {
+ *perr = err;
+ return false;
+ }
+ return true;
+}
git.samba.org / ab / samba.git / .git / blobdiff