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-rw-r--r--lib/tsocket/tsocket.c812
1 files changed, 812 insertions, 0 deletions
diff --git a/lib/tsocket/tsocket.c b/lib/tsocket/tsocket.c
new file mode 100644
index 0000000..674858d
--- /dev/null
+++ b/lib/tsocket/tsocket.c
@@ -0,0 +1,812 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Copyright (C) Stefan Metzmacher 2009
+
+ ** NOTE! The following LGPL license applies to the tsocket
+ ** 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with this library; if not, see <http://www.gnu.org/licenses/>.
+*/
+
+#include "replace.h"
+#include "system/filesys.h"
+#include "tsocket.h"
+#include "tsocket_internal.h"
+
+int tsocket_simple_int_recv(struct tevent_req *req, int *perrno)
+{
+ enum tevent_req_state state;
+ uint64_t error;
+
+ if (!tevent_req_is_error(req, &state, &error)) {
+ return 0;
+ }
+
+ switch (state) {
+ case TEVENT_REQ_NO_MEMORY:
+ *perrno = ENOMEM;
+ return -1;
+ case TEVENT_REQ_TIMED_OUT:
+ *perrno = ETIMEDOUT;
+ return -1;
+ case TEVENT_REQ_USER_ERROR:
+ *perrno = (int)error;
+ return -1;
+ default:
+ break;
+ }
+
+ *perrno = EIO;
+ return -1;
+}
+
+struct tsocket_address *_tsocket_address_create(TALLOC_CTX *mem_ctx,
+ const struct tsocket_address_ops *ops,
+ void *pstate,
+ size_t psize,
+ const char *type,
+ const char *location)
+{
+ void **ppstate = (void **)pstate;
+ struct tsocket_address *addr;
+
+ addr = talloc_zero(mem_ctx, struct tsocket_address);
+ if (!addr) {
+ return NULL;
+ }
+ addr->ops = ops;
+ addr->location = location;
+ addr->private_data = talloc_size(addr, psize);
+ if (!addr->private_data) {
+ talloc_free(addr);
+ return NULL;
+ }
+ talloc_set_name_const(addr->private_data, type);
+
+ *ppstate = addr->private_data;
+ return addr;
+}
+
+char *tsocket_address_string(const struct tsocket_address *addr,
+ TALLOC_CTX *mem_ctx)
+{
+ if (!addr) {
+ return talloc_strdup(mem_ctx, "NULL");
+ }
+ return addr->ops->string(addr, mem_ctx);
+}
+
+struct tsocket_address *_tsocket_address_copy(const struct tsocket_address *addr,
+ TALLOC_CTX *mem_ctx,
+ const char *location)
+{
+ return addr->ops->copy(addr, mem_ctx, location);
+}
+
+struct tdgram_context {
+ const char *location;
+ const struct tdgram_context_ops *ops;
+ void *private_data;
+
+ struct tevent_req *recvfrom_req;
+ struct tevent_req *sendto_req;
+};
+
+static int tdgram_context_destructor(struct tdgram_context *dgram)
+{
+ if (dgram->recvfrom_req) {
+ tevent_req_received(dgram->recvfrom_req);
+ }
+
+ if (dgram->sendto_req) {
+ tevent_req_received(dgram->sendto_req);
+ }
+
+ return 0;
+}
+
+struct tdgram_context *_tdgram_context_create(TALLOC_CTX *mem_ctx,
+ const struct tdgram_context_ops *ops,
+ void *pstate,
+ size_t psize,
+ const char *type,
+ const char *location)
+{
+ struct tdgram_context *dgram;
+ void **ppstate = (void **)pstate;
+ void *state;
+
+ dgram = talloc(mem_ctx, struct tdgram_context);
+ if (dgram == NULL) {
+ return NULL;
+ }
+ dgram->location = location;
+ dgram->ops = ops;
+ dgram->recvfrom_req = NULL;
+ dgram->sendto_req = NULL;
+
+ state = talloc_size(dgram, psize);
+ if (state == NULL) {
+ talloc_free(dgram);
+ return NULL;
+ }
+ talloc_set_name_const(state, type);
+
+ dgram->private_data = state;
+
+ talloc_set_destructor(dgram, tdgram_context_destructor);
+
+ *ppstate = state;
+ return dgram;
+}
+
+void *_tdgram_context_data(struct tdgram_context *dgram)
+{
+ return dgram->private_data;
+}
+
+struct tdgram_recvfrom_state {
+ const struct tdgram_context_ops *ops;
+ struct tdgram_context *dgram;
+ uint8_t *buf;
+ size_t len;
+ struct tsocket_address *src;
+};
+
+static int tdgram_recvfrom_destructor(struct tdgram_recvfrom_state *state)
+{
+ if (state->dgram) {
+ state->dgram->recvfrom_req = NULL;
+ }
+
+ return 0;
+}
+
+static void tdgram_recvfrom_done(struct tevent_req *subreq);
+
+struct tevent_req *tdgram_recvfrom_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram)
+{
+ struct tevent_req *req;
+ struct tdgram_recvfrom_state *state;
+ struct tevent_req *subreq;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tdgram_recvfrom_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->ops = dgram->ops;
+ state->dgram = dgram;
+ state->buf = NULL;
+ state->len = 0;
+ state->src = NULL;
+
+ if (dgram->recvfrom_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+ dgram->recvfrom_req = req;
+
+ talloc_set_destructor(state, tdgram_recvfrom_destructor);
+
+ subreq = state->ops->recvfrom_send(state, ev, dgram);
+ if (tevent_req_nomem(subreq, req)) {
+ goto post;
+ }
+ tevent_req_set_callback(subreq, tdgram_recvfrom_done, req);
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tdgram_recvfrom_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tdgram_recvfrom_state *state = tevent_req_data(req,
+ struct tdgram_recvfrom_state);
+ ssize_t ret;
+ int sys_errno;
+
+ ret = state->ops->recvfrom_recv(subreq, &sys_errno, state,
+ &state->buf, &state->src);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+
+ state->len = ret;
+
+ tevent_req_done(req);
+}
+
+ssize_t tdgram_recvfrom_recv(struct tevent_req *req,
+ int *perrno,
+ TALLOC_CTX *mem_ctx,
+ uint8_t **buf,
+ struct tsocket_address **src)
+{
+ struct tdgram_recvfrom_state *state = tevent_req_data(req,
+ struct tdgram_recvfrom_state);
+ ssize_t ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ *buf = talloc_move(mem_ctx, &state->buf);
+ ret = state->len;
+ if (src) {
+ *src = talloc_move(mem_ctx, &state->src);
+ }
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+
+struct tdgram_sendto_state {
+ const struct tdgram_context_ops *ops;
+ struct tdgram_context *dgram;
+ ssize_t ret;
+};
+
+static int tdgram_sendto_destructor(struct tdgram_sendto_state *state)
+{
+ if (state->dgram) {
+ state->dgram->sendto_req = NULL;
+ }
+
+ return 0;
+}
+
+static void tdgram_sendto_done(struct tevent_req *subreq);
+
+struct tevent_req *tdgram_sendto_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram,
+ const uint8_t *buf, size_t len,
+ const struct tsocket_address *dst)
+{
+ struct tevent_req *req;
+ struct tdgram_sendto_state *state;
+ struct tevent_req *subreq;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tdgram_sendto_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->ops = dgram->ops;
+ state->dgram = dgram;
+ state->ret = -1;
+
+ if (len == 0) {
+ tevent_req_error(req, EINVAL);
+ goto post;
+ }
+
+ if (dgram->sendto_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+ dgram->sendto_req = req;
+
+ talloc_set_destructor(state, tdgram_sendto_destructor);
+
+ subreq = state->ops->sendto_send(state, ev, dgram,
+ buf, len, dst);
+ if (tevent_req_nomem(subreq, req)) {
+ goto post;
+ }
+ tevent_req_set_callback(subreq, tdgram_sendto_done, req);
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tdgram_sendto_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tdgram_sendto_state *state = tevent_req_data(req,
+ struct tdgram_sendto_state);
+ ssize_t ret;
+ int sys_errno;
+
+ ret = state->ops->sendto_recv(subreq, &sys_errno);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+
+ state->ret = ret;
+
+ tevent_req_done(req);
+}
+
+ssize_t tdgram_sendto_recv(struct tevent_req *req,
+ int *perrno)
+{
+ struct tdgram_sendto_state *state = tevent_req_data(req,
+ struct tdgram_sendto_state);
+ ssize_t ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ ret = state->ret;
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+
+struct tdgram_disconnect_state {
+ const struct tdgram_context_ops *ops;
+};
+
+static void tdgram_disconnect_done(struct tevent_req *subreq);
+
+struct tevent_req *tdgram_disconnect_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram)
+{
+ struct tevent_req *req;
+ struct tdgram_disconnect_state *state;
+ struct tevent_req *subreq;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tdgram_disconnect_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->ops = dgram->ops;
+
+ if (dgram->recvfrom_req || dgram->sendto_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+
+ subreq = state->ops->disconnect_send(state, ev, dgram);
+ if (tevent_req_nomem(subreq, req)) {
+ goto post;
+ }
+ tevent_req_set_callback(subreq, tdgram_disconnect_done, req);
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tdgram_disconnect_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tdgram_disconnect_state *state = tevent_req_data(req,
+ struct tdgram_disconnect_state);
+ int ret;
+ int sys_errno;
+
+ ret = state->ops->disconnect_recv(subreq, &sys_errno);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+int tdgram_disconnect_recv(struct tevent_req *req,
+ int *perrno)
+{
+ int ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+
+ tevent_req_received(req);
+ return ret;
+}
+
+struct tstream_context {
+ const char *location;
+ const struct tstream_context_ops *ops;
+ void *private_data;
+
+ struct tevent_req *readv_req;
+ struct tevent_req *writev_req;
+};
+
+static int tstream_context_destructor(struct tstream_context *stream)
+{
+ if (stream->readv_req) {
+ tevent_req_received(stream->readv_req);
+ }
+
+ if (stream->writev_req) {
+ tevent_req_received(stream->writev_req);
+ }
+
+ return 0;
+}
+
+struct tstream_context *_tstream_context_create(TALLOC_CTX *mem_ctx,
+ const struct tstream_context_ops *ops,
+ void *pstate,
+ size_t psize,
+ const char *type,
+ const char *location)
+{
+ struct tstream_context *stream;
+ void **ppstate = (void **)pstate;
+ void *state;
+
+ stream = talloc(mem_ctx, struct tstream_context);
+ if (stream == NULL) {
+ return NULL;
+ }
+ stream->location = location;
+ stream->ops = ops;
+ stream->readv_req = NULL;
+ stream->writev_req = NULL;
+
+ state = talloc_size(stream, psize);
+ if (state == NULL) {
+ talloc_free(stream);
+ return NULL;
+ }
+ talloc_set_name_const(state, type);
+
+ stream->private_data = state;
+
+ talloc_set_destructor(stream, tstream_context_destructor);
+
+ *ppstate = state;
+ return stream;
+}
+
+void *_tstream_context_data(struct tstream_context *stream)
+{
+ return stream->private_data;
+}
+
+ssize_t tstream_pending_bytes(struct tstream_context *stream)
+{
+ return stream->ops->pending_bytes(stream);
+}
+
+struct tstream_readv_state {
+ const struct tstream_context_ops *ops;
+ struct tstream_context *stream;
+ int ret;
+};
+
+static int tstream_readv_destructor(struct tstream_readv_state *state)
+{
+ if (state->stream) {
+ state->stream->readv_req = NULL;
+ }
+
+ return 0;
+}
+
+static void tstream_readv_done(struct tevent_req *subreq);
+
+struct tevent_req *tstream_readv_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tstream_context *stream,
+ struct iovec *vector,
+ size_t count)
+{
+ struct tevent_req *req;
+ struct tstream_readv_state *state;
+ struct tevent_req *subreq;
+ int to_read = 0;
+ size_t i;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tstream_readv_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->ops = stream->ops;
+ state->stream = stream;
+ state->ret = -1;
+
+ /* first check if the input is ok */
+#ifdef IOV_MAX
+ if (count > IOV_MAX) {
+ tevent_req_error(req, EMSGSIZE);
+ goto post;
+ }
+#endif
+
+ for (i=0; i < count; i++) {
+ int tmp = to_read;
+ tmp += vector[i].iov_len;
+
+ if (tmp < to_read) {
+ tevent_req_error(req, EMSGSIZE);
+ goto post;
+ }
+
+ to_read = tmp;
+ }
+
+ if (to_read == 0) {
+ tevent_req_error(req, EINVAL);
+ goto post;
+ }
+
+ if (stream->readv_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+ stream->readv_req = req;
+
+ talloc_set_destructor(state, tstream_readv_destructor);
+
+ subreq = state->ops->readv_send(state, ev, stream, vector, count);
+ if (tevent_req_nomem(subreq, req)) {
+ goto post;
+ }
+ tevent_req_set_callback(subreq, tstream_readv_done, req);
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tstream_readv_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tstream_readv_state *state = tevent_req_data(req,
+ struct tstream_readv_state);
+ ssize_t ret;
+ int sys_errno;
+
+ ret = state->ops->readv_recv(subreq, &sys_errno);
+ TALLOC_FREE(subreq);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+
+ state->ret = ret;
+
+ tevent_req_done(req);
+}
+
+int tstream_readv_recv(struct tevent_req *req,
+ int *perrno)
+{
+ struct tstream_readv_state *state = tevent_req_data(req,
+ struct tstream_readv_state);
+ int ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ ret = state->ret;
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+
+struct tstream_writev_state {
+ const struct tstream_context_ops *ops;
+ struct tstream_context *stream;
+ int ret;
+};
+
+static int tstream_writev_destructor(struct tstream_writev_state *state)
+{
+ if (state->stream) {
+ state->stream->writev_req = NULL;
+ }
+
+ return 0;
+}
+
+static void tstream_writev_done(struct tevent_req *subreq);
+
+struct tevent_req *tstream_writev_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tstream_context *stream,
+ const struct iovec *vector,
+ size_t count)
+{
+ struct tevent_req *req;
+ struct tstream_writev_state *state;
+ struct tevent_req *subreq;
+ int to_write = 0;
+ size_t i;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tstream_writev_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->ops = stream->ops;
+ state->stream = stream;
+ state->ret = -1;
+
+ /* first check if the input is ok */
+#ifdef IOV_MAX
+ if (count > IOV_MAX) {
+ tevent_req_error(req, EMSGSIZE);
+ goto post;
+ }
+#endif
+
+ for (i=0; i < count; i++) {
+ int tmp = to_write;
+ tmp += vector[i].iov_len;
+
+ if (tmp < to_write) {
+ tevent_req_error(req, EMSGSIZE);
+ goto post;
+ }
+
+ to_write = tmp;
+ }
+
+ if (to_write == 0) {
+ tevent_req_error(req, EINVAL);
+ goto post;
+ }
+
+ if (stream->writev_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+ stream->writev_req = req;
+
+ talloc_set_destructor(state, tstream_writev_destructor);
+
+ subreq = state->ops->writev_send(state, ev, stream, vector, count);
+ if (tevent_req_nomem(subreq, req)) {
+ goto post;
+ }
+ tevent_req_set_callback(subreq, tstream_writev_done, req);
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tstream_writev_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tstream_writev_state *state = tevent_req_data(req,
+ struct tstream_writev_state);
+ ssize_t ret;
+ int sys_errno;
+
+ ret = state->ops->writev_recv(subreq, &sys_errno);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+
+ state->ret = ret;
+
+ tevent_req_done(req);
+}
+
+int tstream_writev_recv(struct tevent_req *req,
+ int *perrno)
+{
+ struct tstream_writev_state *state = tevent_req_data(req,
+ struct tstream_writev_state);
+ int ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ ret = state->ret;
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+
+struct tstream_disconnect_state {
+ const struct tstream_context_ops *ops;
+};
+
+static void tstream_disconnect_done(struct tevent_req *subreq);
+
+struct tevent_req *tstream_disconnect_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tstream_context *stream)
+{
+ struct tevent_req *req;
+ struct tstream_disconnect_state *state;
+ struct tevent_req *subreq;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tstream_disconnect_state);
+ if (req == NULL) {
+ return NULL;
+ }
+
+ state->ops = stream->ops;
+
+ if (stream->readv_req || stream->writev_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+
+ subreq = state->ops->disconnect_send(state, ev, stream);
+ if (tevent_req_nomem(subreq, req)) {
+ goto post;
+ }
+ tevent_req_set_callback(subreq, tstream_disconnect_done, req);
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tstream_disconnect_done(struct tevent_req *subreq)
+{
+ struct tevent_req *req = tevent_req_callback_data(subreq,
+ struct tevent_req);
+ struct tstream_disconnect_state *state = tevent_req_data(req,
+ struct tstream_disconnect_state);
+ int ret;
+ int sys_errno;
+
+ ret = state->ops->disconnect_recv(subreq, &sys_errno);
+ if (ret == -1) {
+ tevent_req_error(req, sys_errno);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+int tstream_disconnect_recv(struct tevent_req *req,
+ int *perrno)
+{
+ int ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+
+ tevent_req_received(req);
+ return ret;
+}
+