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authorGünther Deschner <gd@samba.org>2011-02-17 00:43:05 +0100
committerGünther Deschner <gd@samba.org>2011-02-17 00:52:42 +0100
commitbc83400d8102d7f01e00d71d86cd28f7dc1fbfc9 (patch)
tree9110a773250ecfd4dce0b1340274d29695baa17f /nsswitch
parent743b13b8e0bb1a79219d4cd89a4c3e3f75344d2c (diff)
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nsswitch: make wb_reqtrans a common subsystem.
Guenther
Diffstat (limited to 'nsswitch')
-rw-r--r--nsswitch/wb_reqtrans.c446
-rw-r--r--nsswitch/wb_reqtrans.h61
-rw-r--r--nsswitch/wscript_build5
3 files changed, 512 insertions, 0 deletions
diff --git a/nsswitch/wb_reqtrans.c b/nsswitch/wb_reqtrans.c
new file mode 100644
index 0000000000..779ef52a92
--- /dev/null
+++ b/nsswitch/wb_reqtrans.c
@@ -0,0 +1,446 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Async transfer of winbindd_request and _response structs
+
+ Copyright (C) Volker Lendecke 2008
+
+ ** NOTE! The following LGPL license applies to the wbclient
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
+
+ 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
+ Library General Public License for more details.
+
+ 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 "replace.h"
+#include "system/filesys.h"
+#include "system/network.h"
+#include <talloc.h>
+#include <tevent.h>
+#include "lib/async_req/async_sock.h"
+#include "lib/util/tevent_unix.h"
+#include "nsswitch/winbind_struct_protocol.h"
+#include "nsswitch/libwbclient/wbclient.h"
+#include "nsswitch/wb_reqtrans.h"
+
+/* can't use DEBUG here... */
+#define DEBUG(a,b)
+
+struct req_read_state {
+ struct winbindd_request *wb_req;
+ size_t max_extra_data;
+ ssize_t ret;
+};
+
+static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data);
+static void wb_req_read_done(struct tevent_req *subreq);
+
+struct tevent_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ int fd, size_t max_extra_data)
+{
+ struct tevent_req *req, *subreq;
+ struct req_read_state *state;
+
+ req = tevent_req_create(mem_ctx, &state, struct req_read_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->max_extra_data = max_extra_data;
+
+ subreq = read_packet_send(state, ev, fd, 4, wb_req_more, state);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, wb_req_read_done, req);
+ return req;
+}
+
+static ssize_t wb_req_more(uint8_t *buf, size_t buflen, void *private_data)
+{
+ struct req_read_state *state = talloc_get_type_abort(
+ private_data, struct req_read_state);
+ struct winbindd_request *req = (struct winbindd_request *)buf;
+
+ if (buflen == 4) {
+ if (req->length != sizeof(struct winbindd_request)) {
+ DEBUG(0, ("wb_req_read_len: Invalid request size "
+ "received: %d (expected %d)\n",
+ (int)req->length,
+ (int)sizeof(struct winbindd_request)));
+ return -1;
+ }
+ return sizeof(struct winbindd_request) - 4;
+ }
+
+ if (buflen > sizeof(struct winbindd_request)) {
+ /* We've been here, we're done */
+ return 0;
+ }
+
+ if ((state->max_extra_data != 0)
+ && (req->extra_len > state->max_extra_data)) {
+ DEBUG(3, ("Got request with %d bytes extra data on "
+ "unprivileged socket\n", (int)req->extra_len));
+ return -1;
+ }
+
+ return req->extra_len;
+}
+
+static void wb_req_read_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct req_read_state *state = tevent_req_data(
+ req, struct req_read_state);
+ int err;
+ uint8_t *buf;
+
+ state->ret = read_packet_recv(subreq, state, &buf, &err);
+ TALLOC_FREE(subreq);
+ if (state->ret == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+
+ state->wb_req = (struct winbindd_request *)buf;
+
+ if (state->wb_req->extra_len != 0) {
+ state->wb_req->extra_data.data =
+ (char *)buf + sizeof(struct winbindd_request);
+ } else {
+ state->wb_req->extra_data.data = NULL;
+ }
+ tevent_req_done(req);
+}
+
+ssize_t wb_req_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_request **preq, int *err)
+{
+ struct req_read_state *state = tevent_req_data(
+ req, struct req_read_state);
+
+ if (tevent_req_is_unix_error(req, err)) {
+ return -1;
+ }
+ *preq = talloc_move(mem_ctx, &state->wb_req);
+ return state->ret;
+}
+
+struct req_write_state {
+ struct iovec iov[2];
+ ssize_t ret;
+};
+
+static void wb_req_write_done(struct tevent_req *subreq);
+
+struct tevent_req *wb_req_write_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tevent_queue *queue, int fd,
+ struct winbindd_request *wb_req)
+{
+ struct tevent_req *req, *subreq;
+ struct req_write_state *state;
+ int count = 1;
+
+ req = tevent_req_create(mem_ctx, &state, struct req_write_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->iov[0].iov_base = (void *)wb_req;
+ state->iov[0].iov_len = sizeof(struct winbindd_request);
+
+ if (wb_req->extra_len != 0) {
+ state->iov[1].iov_base = (void *)wb_req->extra_data.data;
+ state->iov[1].iov_len = wb_req->extra_len;
+ count = 2;
+ }
+
+ subreq = writev_send(state, ev, queue, fd, true, state->iov, count);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, wb_req_write_done, req);
+ return req;
+}
+
+static void wb_req_write_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct req_write_state *state = tevent_req_data(
+ req, struct req_write_state);
+ int err;
+
+ state->ret = writev_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (state->ret < 0) {
+ tevent_req_error(req, err);
+ return;
+ }
+ tevent_req_done(req);
+}
+
+ssize_t wb_req_write_recv(struct tevent_req *req, int *err)
+{
+ struct req_write_state *state = tevent_req_data(
+ req, struct req_write_state);
+
+ if (tevent_req_is_unix_error(req, err)) {
+ return -1;
+ }
+ return state->ret;
+}
+
+struct resp_read_state {
+ struct winbindd_response *wb_resp;
+ ssize_t ret;
+};
+
+static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data);
+static void wb_resp_read_done(struct tevent_req *subreq);
+
+struct tevent_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev, int fd)
+{
+ struct tevent_req *req, *subreq;
+ struct resp_read_state *state;
+
+ req = tevent_req_create(mem_ctx, &state, struct resp_read_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ subreq = read_packet_send(state, ev, fd, 4, wb_resp_more, state);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, wb_resp_read_done, req);
+ return req;
+}
+
+static ssize_t wb_resp_more(uint8_t *buf, size_t buflen, void *private_data)
+{
+ struct winbindd_response *resp = (struct winbindd_response *)buf;
+
+ if (buflen == 4) {
+ if (resp->length < sizeof(struct winbindd_response)) {
+ DEBUG(0, ("wb_resp_read_len: Invalid response size "
+ "received: %d (expected at least%d)\n",
+ (int)resp->length,
+ (int)sizeof(struct winbindd_response)));
+ return -1;
+ }
+ }
+ return resp->length - buflen;
+}
+
+static void wb_resp_read_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct resp_read_state *state = tevent_req_data(
+ req, struct resp_read_state);
+ uint8_t *buf;
+ int err;
+
+ state->ret = read_packet_recv(subreq, state, &buf, &err);
+ TALLOC_FREE(subreq);
+ if (state->ret == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+
+ state->wb_resp = (struct winbindd_response *)buf;
+
+ if (state->wb_resp->length > sizeof(struct winbindd_response)) {
+ state->wb_resp->extra_data.data =
+ (char *)buf + sizeof(struct winbindd_response);
+ } else {
+ state->wb_resp->extra_data.data = NULL;
+ }
+ tevent_req_done(req);
+}
+
+ssize_t wb_resp_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presp, int *err)
+{
+ struct resp_read_state *state = tevent_req_data(
+ req, struct resp_read_state);
+
+ if (tevent_req_is_unix_error(req, err)) {
+ return -1;
+ }
+ *presp = talloc_move(mem_ctx, &state->wb_resp);
+ return state->ret;
+}
+
+struct resp_write_state {
+ struct iovec iov[2];
+ ssize_t ret;
+};
+
+static void wb_resp_write_done(struct tevent_req *subreq);
+
+struct tevent_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tevent_queue *queue, int fd,
+ struct winbindd_response *wb_resp)
+{
+ struct tevent_req *req, *subreq;
+ struct resp_write_state *state;
+ int count = 1;
+
+ req = tevent_req_create(mem_ctx, &state, struct resp_write_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->iov[0].iov_base = (void *)wb_resp;
+ state->iov[0].iov_len = sizeof(struct winbindd_response);
+
+ if (wb_resp->length > sizeof(struct winbindd_response)) {
+ state->iov[1].iov_base = (void *)wb_resp->extra_data.data;
+ state->iov[1].iov_len =
+ wb_resp->length - sizeof(struct winbindd_response);
+ count = 2;
+ }
+
+ subreq = writev_send(state, ev, queue, fd, true, state->iov, count);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, wb_resp_write_done, req);
+ return req;
+}
+
+static void wb_resp_write_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct resp_write_state *state = tevent_req_data(
+ req, struct resp_write_state);
+ int err;
+
+ state->ret = writev_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (state->ret < 0) {
+ tevent_req_error(req, err);
+ return;
+ }
+ tevent_req_done(req);
+}
+
+ssize_t wb_resp_write_recv(struct tevent_req *req, int *err)
+{
+ struct resp_write_state *state = tevent_req_data(
+ req, struct resp_write_state);
+
+ if (tevent_req_is_unix_error(req, err)) {
+ return -1;
+ }
+ return state->ret;
+}
+
+struct wb_simple_trans_state {
+ struct tevent_context *ev;
+ int fd;
+ struct winbindd_response *wb_resp;
+};
+
+static void wb_simple_trans_write_done(struct tevent_req *subreq);
+static void wb_simple_trans_read_done(struct tevent_req *subreq);
+
+struct tevent_req *wb_simple_trans_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tevent_queue *queue, int fd,
+ struct winbindd_request *wb_req)
+{
+ struct tevent_req *req, *subreq;
+ struct wb_simple_trans_state *state;
+
+ req = tevent_req_create(mem_ctx, &state, struct wb_simple_trans_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ wb_req->length = sizeof(struct winbindd_request);
+
+ state->ev = ev;
+ state->fd = fd;
+
+ subreq = wb_req_write_send(state, ev, queue, fd, wb_req);
+ if (tevent_req_nomem(subreq, req)) {
+ return tevent_req_post(req, ev);
+ }
+ tevent_req_set_callback(subreq, wb_simple_trans_write_done, req);
+
+ return req;
+}
+
+static void wb_simple_trans_write_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct wb_simple_trans_state *state = tevent_req_data(
+ req, struct wb_simple_trans_state);
+ ssize_t ret;
+ int err;
+
+ ret = wb_req_write_recv(subreq, &err);
+ TALLOC_FREE(subreq);
+ if (ret == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+ subreq = wb_resp_read_send(state, state->ev, state->fd);
+ if (tevent_req_nomem(subreq, req)) {
+ return;
+ }
+ tevent_req_set_callback(subreq, wb_simple_trans_read_done, req);
+}
+
+static void wb_simple_trans_read_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(
+ subreq, struct tevent_req);
+ struct wb_simple_trans_state *state = tevent_req_data(
+ req, struct wb_simple_trans_state);
+ ssize_t ret;
+ int err;
+
+ ret = wb_resp_read_recv(subreq, state, &state->wb_resp, &err);
+ TALLOC_FREE(subreq);
+ if (ret == -1) {
+ tevent_req_error(req, err);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+int wb_simple_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presponse, int *err)
+{
+ struct wb_simple_trans_state *state = tevent_req_data(
+ req, struct wb_simple_trans_state);
+
+ if (tevent_req_is_unix_error(req, err)) {
+ return -1;
+ }
+ *presponse = talloc_move(mem_ctx, &state->wb_resp);
+ return 0;
+}
diff --git a/nsswitch/wb_reqtrans.h b/nsswitch/wb_reqtrans.h
new file mode 100644
index 0000000000..941edf659a
--- /dev/null
+++ b/nsswitch/wb_reqtrans.h
@@ -0,0 +1,61 @@
+/*
+ Unix SMB/CIFS implementation.
+ Headers for the async winbind client library
+ Copyright (C) Volker Lendecke 2008
+
+ ** NOTE! The following LGPL license applies to the wbclient
+ ** library. This does NOT imply that all of Samba is released
+ ** under the LGPL
+
+ 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
+ Library General Public License for more details.
+
+ 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/>.
+*/
+
+#ifndef _WB_REQTRANS_H_
+#define _WB_REQTRANS_H_
+
+#include <talloc.h>
+#include <tevent.h>
+#include "nsswitch/winbind_struct_protocol.h"
+
+struct tevent_req *wb_req_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ int fd, size_t max_extra_data);
+ssize_t wb_req_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_request **preq, int *err);
+
+struct tevent_req *wb_req_write_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tevent_queue *queue, int fd,
+ struct winbindd_request *wb_req);
+ssize_t wb_req_write_recv(struct tevent_req *req, int *err);
+
+struct tevent_req *wb_resp_read_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev, int fd);
+ssize_t wb_resp_read_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presp, int *err);
+
+struct tevent_req *wb_resp_write_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tevent_queue *queue, int fd,
+ struct winbindd_response *wb_resp);
+ssize_t wb_resp_write_recv(struct tevent_req *req, int *err);
+
+struct tevent_req *wb_simple_trans_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tevent_queue *queue, int fd,
+ struct winbindd_request *wb_req);
+int wb_simple_trans_recv(struct tevent_req *req, TALLOC_CTX *mem_ctx,
+ struct winbindd_response **presponse, int *err);
+
+#endif /*_WB_REQTRANS_H_*/
diff --git a/nsswitch/wscript_build b/nsswitch/wscript_build
index a81b01bcbd..6087eda18e 100644
--- a/nsswitch/wscript_build
+++ b/nsswitch/wscript_build
@@ -34,3 +34,8 @@ if bld.CONFIG_SET('HAVE_KRB5_LOCATE_PLUGIN_H'):
source='winbind_krb5_locator.c',
deps='wbclient krb5',
realname='winbind_krb5_locator.so')
+
+bld.SAMBA_SUBSYSTEM('WB_REQTRANS',
+ source='wb_reqtrans.c',
+ deps='talloc tevent LIBASYNC_REQ'
+ )