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-rw-r--r--lib/tsocket/config.mk3
-rw-r--r--lib/tsocket/tsocket.h6
-rw-r--r--lib/tsocket/tsocket_writev.c187
3 files changed, 195 insertions, 1 deletions
diff --git a/lib/tsocket/config.mk b/lib/tsocket/config.mk
index b3890408f9..72614a3f82 100644
--- a/lib/tsocket/config.mk
+++ b/lib/tsocket/config.mk
@@ -7,7 +7,8 @@ LIBTSOCKET_OBJ_FILES = $(addprefix ../lib/tsocket/, \
tsocket_bsd.o \
tsocket_recvfrom.o \
tsocket_sendto.o \
- tsocket_connect.o)
+ tsocket_connect.o \
+ tsocket_writev.o)
PUBLIC_HEADERS += $(addprefix ../lib/tsocket/, \
tsocket.h\
diff --git a/lib/tsocket/tsocket.h b/lib/tsocket/tsocket.h
index f7a7d6b614..2456062b47 100644
--- a/lib/tsocket/tsocket.h
+++ b/lib/tsocket/tsocket.h
@@ -192,5 +192,11 @@ struct tevent_req *tsocket_connect_send(struct tsocket_context *sock,
const struct tsocket_address *dst);
int tsocket_connect_recv(struct tevent_req *req, int *perrno);
+struct tevent_req *tsocket_writev_send(struct tsocket_context *sock,
+ TALLOC_CTX *mem_ctx,
+ const struct iovec *vector,
+ size_t count);
+int tsocket_writev_recv(struct tevent_req *req, int *perrno);
+
#endif /* _TSOCKET_H */
diff --git a/lib/tsocket/tsocket_writev.c b/lib/tsocket/tsocket_writev.c
new file mode 100644
index 0000000000..40b24b1025
--- /dev/null
+++ b/lib/tsocket/tsocket_writev.c
@@ -0,0 +1,187 @@
+/*
+ Unix SMB/CIFS implementation.
+
+ Copyright (C) Stefan Metzmacher 2009
+
+ ** NOTE! The following LGPL license applies to the tevent
+ ** 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/network.h"
+#include "tsocket.h"
+#include "tsocket_internal.h"
+
+struct tsocket_writev_state {
+ /* this structs are owned by the caller */
+ struct {
+ struct tsocket_context *sock;
+ const struct iovec *vector;
+ size_t count;
+ } caller;
+
+ struct iovec *iov;
+ size_t count;
+ int total_written;
+};
+
+static int tsocket_writev_state_destructor(struct tsocket_writev_state *state)
+{
+ if (state->caller.sock) {
+ tsocket_set_writeable_handler(state->caller.sock, NULL, NULL);
+ }
+ ZERO_STRUCT(state->caller);
+
+ return 0;
+}
+
+static void tsocket_writev_handler(struct tsocket_context *sock,
+ void *private_data);
+
+struct tevent_req *tsocket_writev_send(struct tsocket_context *sock,
+ TALLOC_CTX *mem_ctx,
+ const struct iovec *vector,
+ size_t count)
+{
+ struct tevent_req *req;
+ struct tsocket_writev_state *state;
+ int ret;
+ int err;
+ bool dummy;
+ int to_write = 0;
+ size_t i;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tsocket_writev_state);
+ if (!req) {
+ return NULL;
+ }
+
+ state->caller.sock = sock;
+ state->caller.vector = vector;
+ state->caller.count = count;
+
+ state->iov = NULL;
+ state->count = count;
+ state->total_written = 0;
+
+ state->iov = talloc_array(state, struct iovec, count);
+ if (tevent_req_nomem(state->iov, req)) {
+ goto post;
+ }
+ memcpy(state->iov, vector, sizeof(struct iovec) * count);
+
+ for (i=0; i < count; i++) {
+ int tmp = to_write;
+
+ tmp += state->iov[i].iov_len;
+
+ if (tmp < to_write) {
+ tevent_req_error(req, EMSGSIZE);
+ goto post;
+ }
+
+ to_write = tmp;
+ }
+
+ if (to_write == 0) {
+ tevent_req_done(req);
+ goto post;
+ }
+
+ talloc_set_destructor(state, tsocket_writev_state_destructor);
+
+ ret = tsocket_set_writeable_handler(sock,
+ tsocket_writev_handler,
+ req);
+ err = tsocket_error_from_errno(ret, errno, &dummy);
+ if (tevent_req_error(req, err)) {
+ goto post;
+ }
+
+ return req;
+
+ post:
+ return tevent_req_post(req, sock->event.ctx);
+}
+
+static void tsocket_writev_handler(struct tsocket_context *sock,
+ void *private_data)
+{
+ struct tevent_req *req = talloc_get_type(private_data,
+ struct tevent_req);
+ struct tsocket_writev_state *state = tevent_req_data(req,
+ struct tsocket_writev_state);
+ int ret;
+ int err;
+ bool retry;
+
+ ret = tsocket_writev(state->caller.sock,
+ state->iov,
+ state->count);
+ err = tsocket_error_from_errno(ret, errno, &retry);
+ if (retry) {
+ /* retry later */
+ return;
+ }
+ if (tevent_req_error(req, err)) {
+ return;
+ }
+
+ state->total_written += ret;
+
+ /*
+ * we have not written everything yet, so we need to truncate
+ * the already written bytes from our iov copy
+ */
+ while (ret > 0) {
+ if (ret < state->iov[0].iov_len) {
+ uint8_t *base;
+ base = (uint8_t *)state->iov[0].iov_base;
+ base += ret;
+ state->iov[0].iov_base = base;
+ state->iov[0].iov_len -= ret;
+ break;
+ }
+ ret -= state->iov[0].iov_len;
+ state->iov += 1;
+ state->count -= 1;
+ }
+
+ if (state->count > 0) {
+ /* more to write */
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+int tsocket_writev_recv(struct tevent_req *req, int *perrno)
+{
+ struct tsocket_writev_state *state = tevent_req_data(req,
+ struct tsocket_writev_state);
+ int ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ ret = state->total_written;
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+