diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/tsocket/config.mk | 3 | ||||
| -rw-r--r-- | lib/tsocket/tsocket.h | 6 | ||||
| -rw-r--r-- | lib/tsocket/tsocket_writev.c | 187 |
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; +} + |