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-rw-r--r--lib/tsocket/tsocket.c264
-rw-r--r--lib/tsocket/tsocket.h43
-rw-r--r--lib/tsocket/tsocket_bsd.c844
-rw-r--r--lib/tsocket/tsocket_internal.h41
4 files changed, 1192 insertions, 0 deletions
diff --git a/lib/tsocket/tsocket.c b/lib/tsocket/tsocket.c
index 1a12e691a9..922429a1c1 100644
--- a/lib/tsocket/tsocket.c
+++ b/lib/tsocket/tsocket.c
@@ -229,3 +229,267 @@ int _tsocket_address_create_socket(const struct tsocket_address *addr,
return addr->ops->create_socket(addr, type, mem_ctx, sock, location);
}
+struct tdgram_context {
+ const char *location;
+ const struct tdgram_context_ops *ops;
+ void *private_data;
+};
+
+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;
+
+ state = talloc_size(dgram, psize);
+ if (state == NULL) {
+ talloc_free(dgram);
+ return NULL;
+ }
+ talloc_set_name_const(state, type);
+
+ dgram->private_data = state;
+
+ *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;
+ uint8_t *buf;
+ size_t len;
+ struct tsocket_address *src;
+};
+
+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;
+
+ 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;
+ ssize_t ret;
+};
+
+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->ret = -1;
+
+ 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;
+
+ 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;
+}
+
diff --git a/lib/tsocket/tsocket.h b/lib/tsocket/tsocket.h
index 9bcfb5cb7e..077fd1ef35 100644
--- a/lib/tsocket/tsocket.h
+++ b/lib/tsocket/tsocket.h
@@ -29,6 +29,7 @@
struct tsocket_context;
struct tsocket_address;
+struct tdgram_context;
struct iovec;
enum tsocket_type {
@@ -121,6 +122,32 @@ int _tsocket_address_create_socket(const struct tsocket_address *addr,
__location__)
/*
+ * tdgram_context related functions
+ */
+struct tevent_req *tdgram_recvfrom_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram);
+ssize_t tdgram_recvfrom_recv(struct tevent_req *req,
+ int *perrno,
+ TALLOC_CTX *mem_ctx,
+ uint8_t **buf,
+ struct tsocket_address **src);
+
+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);
+ssize_t tdgram_sendto_recv(struct tevent_req *req,
+ int *perrno);
+
+struct tevent_req *tdgram_disconnect_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram);
+int tdgram_disconnect_recv(struct tevent_req *req,
+ int *perrno);
+
+/*
* BSD sockets: inet, inet6 and unix
*/
@@ -160,6 +187,22 @@ int _tsocket_context_bsd_wrap_existing(TALLOC_CTX *mem_ctx,
_tsocket_context_bsd_wrap_existing(mem_ctx, fd, cod, _sock, \
__location__)
+int _tdgram_inet_udp_socket(const struct tsocket_address *local,
+ const struct tsocket_address *remote,
+ TALLOC_CTX *mem_ctx,
+ struct tdgram_context **dgram,
+ const char *location);
+#define tdgram_inet_udp_socket(local, remote, mem_ctx, dgram) \
+ _tdgram_inet_udp_socket(local, remote, mem_ctx, dgram, __location__)
+
+int _tdgram_unix_dgram_socket(const struct tsocket_address *local,
+ const struct tsocket_address *remote,
+ TALLOC_CTX *mem_ctx,
+ struct tdgram_context **dgram,
+ const char *location);
+#define tdgram_unix_dgram_socket(local, remote, mem_ctx, dgram) \
+ _tdgram_unix_dgram_socket(local, remote, mem_ctx, dgram, __location__)
+
/*
* Async helpers
*/
diff --git a/lib/tsocket/tsocket_bsd.c b/lib/tsocket/tsocket_bsd.c
index 8254f5d9d3..6c60ef2ebd 100644
--- a/lib/tsocket/tsocket_bsd.c
+++ b/lib/tsocket/tsocket_bsd.c
@@ -24,9 +24,168 @@
#include "replace.h"
#include "system/filesys.h"
#include "system/network.h"
+#include "system/filesys.h"
#include "tsocket.h"
#include "tsocket_internal.h"
+static int tsocket_bsd_error_from_errno(int ret,
+ int sys_errno,
+ bool *retry)
+{
+ *retry = false;
+
+ if (ret >= 0) {
+ return 0;
+ }
+
+ if (ret != -1) {
+ return EIO;
+ }
+
+ if (sys_errno == 0) {
+ return EIO;
+ }
+
+ if (sys_errno == EINTR) {
+ *retry = true;
+ return sys_errno;
+ }
+
+ if (sys_errno == EINPROGRESS) {
+ *retry = true;
+ return sys_errno;
+ }
+
+ if (sys_errno == EAGAIN) {
+ *retry = true;
+ return sys_errno;
+ }
+
+#ifdef EWOULDBLOCK
+ if (sys_errno == EWOULDBLOCK) {
+ *retry = true;
+ return sys_errno;
+ }
+#endif
+
+ return sys_errno;
+}
+
+static int tsocket_bsd_common_prepare_fd(int fd, bool high_fd)
+{
+ int i;
+ int sys_errno = 0;
+ int fds[3];
+ int num_fds = 0;
+
+ int result, flags;
+
+ if (fd == -1) {
+ return -1;
+ }
+
+ /* first make a fd >= 3 */
+ if (high_fd) {
+ while (fd < 3) {
+ fds[num_fds++] = fd;
+ fd = dup(fd);
+ if (fd == -1) {
+ sys_errno = errno;
+ break;
+ }
+ }
+ for (i=0; i<num_fds; i++) {
+ close(fds[i]);
+ }
+ if (fd == -1) {
+ errno = sys_errno;
+ return fd;
+ }
+ }
+
+ /* fd should be nonblocking. */
+
+#ifdef O_NONBLOCK
+#define FLAG_TO_SET O_NONBLOCK
+#else
+#ifdef SYSV
+#define FLAG_TO_SET O_NDELAY
+#else /* BSD */
+#define FLAG_TO_SET FNDELAY
+#endif
+#endif
+
+ if ((flags = fcntl(fd, F_GETFL)) == -1) {
+ goto fail;
+ }
+
+ flags |= FLAG_TO_SET;
+ if (fcntl(fd, F_SETFL, flags) == -1) {
+ goto fail;
+ }
+
+#undef FLAG_TO_SET
+
+ /* fd should be closed on exec() */
+#ifdef FD_CLOEXEC
+ result = flags = fcntl(fd, F_GETFD, 0);
+ if (flags >= 0) {
+ flags |= FD_CLOEXEC;
+ result = fcntl(fd, F_SETFD, flags);
+ }
+ if (result < 0) {
+ goto fail;
+ }
+#endif
+ return fd;
+
+ fail:
+ if (fd != -1) {
+ sys_errno = errno;
+ close(fd);
+ errno = sys_errno;
+ }
+ return -1;
+}
+
+static ssize_t tsocket_bsd_pending(int fd)
+{
+ int ret;
+ int value = 0;
+
+ ret = ioctl(fd, FIONREAD, &value);
+ if (ret == -1) {
+ return ret;
+ }
+
+ if (ret == 0) {
+ if (value == 0) {
+ int error=0;
+ socklen_t len = sizeof(error);
+ /*
+ * if no data is available check if the socket
+ * is in error state. For dgram sockets
+ * it's the way to return ICMP error messages
+ * of connected sockets to the caller.
+ */
+ ret = getsockopt(fd, SOL_SOCKET, SO_ERROR,
+ &error, &len);
+ if (ret == -1) {
+ return ret;
+ }
+ if (error != 0) {
+ errno = error;
+ return -1;
+ }
+ }
+ return value;
+ }
+
+ /* this should not be reached */
+ errno = EIO;
+ return -1;
+}
+
static const struct tsocket_context_ops tsocket_context_bsd_ops;
static const struct tsocket_address_ops tsocket_address_bsd_ops;
@@ -1125,3 +1284,688 @@ static const struct tsocket_context_ops tsocket_context_bsd_ops = {
.disconnect = tsocket_context_bsd_disconnect
};
+
+struct tdgram_bsd {
+ int fd;
+
+ void *event_ptr;
+ struct tevent_fd *fde;
+
+ void *readable_private;
+ void (*readable_handler)(void *private_data);
+ void *writeable_private;
+ void (*writeable_handler)(void *private_data);
+
+ struct tevent_req *read_req;
+ struct tevent_req *write_req;
+};
+
+static void tdgram_bsd_fde_handler(struct tevent_context *ev,
+ struct tevent_fd *fde,
+ uint16_t flags,
+ void *private_data)
+{
+ struct tdgram_bsd *bsds = talloc_get_type_abort(private_data,
+ struct tdgram_bsd);
+
+ if (flags & TEVENT_FD_WRITE) {
+ bsds->writeable_handler(bsds->writeable_private);
+ return;
+ }
+ if (flags & TEVENT_FD_READ) {
+ bsds->readable_handler(bsds->readable_private);
+ return;
+ }
+}
+
+static int tdgram_bsd_set_readable_handler(struct tdgram_bsd *bsds,
+ struct tevent_context *ev,
+ void (*handler)(void *private_data),
+ void *private_data)
+{
+ if (ev == NULL) {
+ if (handler) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ bsds->readable_handler = NULL;
+ bsds->readable_private = NULL;
+ TEVENT_FD_NOT_READABLE(bsds->fde);
+
+ if (bsds->fde && !bsds->writeable_handler) {
+ /* we don't need the fd event anymore */
+ bsds->event_ptr = NULL;
+ TALLOC_FREE(bsds->fde);
+ }
+ return 0;
+ }
+
+ if (bsds->fde == NULL) {
+ bsds->fde = tevent_add_fd(ev, bsds,
+ bsds->fd, TEVENT_FD_READ,
+ tdgram_bsd_fde_handler,
+ bsds);
+ if (!bsds->fde) {
+ return -1;
+ }
+
+ /* cache the event context we're running on */
+ bsds->event_ptr = ev;
+ }
+
+ /* read and write must use the same tevent_context */
+ if (bsds->event_ptr != ev) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ TEVENT_FD_READABLE(bsds->fde);
+ bsds->readable_handler = handler;
+ bsds->readable_private = private_data;
+
+ return 0;
+}
+
+static int tdgram_bsd_set_writeable_handler(struct tdgram_bsd *bsds,
+ struct tevent_context *ev,
+ void (*handler)(void *private_data),
+ void *private_data)
+{
+ if (ev == NULL) {
+ if (handler) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ bsds->writeable_handler = NULL;
+ bsds->writeable_private = NULL;
+ TEVENT_FD_NOT_WRITEABLE(bsds->fde);
+
+ if (bsds->fde && !bsds->readable_handler) {
+ /* we don't need the fd event anymore */
+ bsds->event_ptr = NULL;
+ TALLOC_FREE(bsds->fde);
+ }
+ return 0;
+ }
+
+ if (bsds->fde == NULL) {
+ bsds->fde = tevent_add_fd(ev, bsds,
+ bsds->fd, TEVENT_FD_WRITE,
+ tdgram_bsd_fde_handler,
+ bsds);
+ if (!bsds->fde) {
+ return -1;
+ }
+
+ /* cache the event context we're running on */
+ bsds->event_ptr = ev;
+ }
+
+ /* read and write must use the same tevent_context */
+ if (bsds->event_ptr != ev) {
+ errno = EINVAL;
+ return -1;
+ }
+
+ TEVENT_FD_WRITEABLE(bsds->fde);
+ bsds->writeable_handler = handler;
+ bsds->writeable_private = private_data;
+
+ return 0;
+}
+
+struct tdgram_bsd_recvfrom_state {
+ struct tdgram_context *dgram;
+
+ uint8_t *buf;
+ size_t len;
+ struct tsocket_address *src;
+};
+
+static int tdgram_bsd_recvfrom_destructor(struct tdgram_bsd_recvfrom_state *state)
+{
+ struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
+ struct tdgram_bsd);
+
+ bsds->read_req = NULL;
+ tdgram_bsd_set_readable_handler(bsds, NULL, NULL, NULL);
+
+ return 0;
+}
+
+static void tdgram_bsd_recvfrom_handler(void *private_data);
+
+static struct tevent_req *tdgram_bsd_recvfrom_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram)
+{
+ struct tevent_req *req;
+ struct tdgram_bsd_recvfrom_state *state;
+ struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
+ int ret;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tdgram_bsd_recvfrom_state);
+ if (!req) {
+ return NULL;
+ }
+
+ state->dgram = dgram;
+ state->buf = NULL;
+ state->len = 0;
+ state->src = NULL;
+
+ if (bsds->read_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+ bsds->read_req = req;
+
+ talloc_set_destructor(state, tdgram_bsd_recvfrom_destructor);
+
+ if (bsds->fd == -1) {
+ tevent_req_error(req, ENOTCONN);
+ goto post;
+ }
+
+ ret = tdgram_bsd_set_readable_handler(bsds, ev,
+ tdgram_bsd_recvfrom_handler,
+ req);
+ if (ret == -1) {
+ tevent_req_error(req, errno);
+ goto post;
+ }
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tdgram_bsd_recvfrom_handler(void *private_data)
+{
+ struct tevent_req *req = talloc_get_type_abort(private_data,
+ struct tevent_req);
+ struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
+ struct tdgram_bsd_recvfrom_state);
+ struct tdgram_context *dgram = state->dgram;
+ struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
+ struct tsocket_address_bsd *bsda;
+ ssize_t ret;
+ struct sockaddr *sa = NULL;
+ socklen_t sa_len = 0;
+ int err;
+ bool retry;
+
+ ret = tsocket_bsd_pending(bsds->fd);
+ if (ret == 0) {
+ /* retry later */
+ return;
+ }
+ err = tsocket_bsd_error_from_errno(ret, errno, &retry);
+ if (retry) {
+ /* retry later */
+ return;
+ }
+ if (tevent_req_error(req, err)) {
+ return;
+ }
+
+ state->buf = talloc_array(state, uint8_t, ret);
+ if (tevent_req_nomem(state->buf, req)) {
+ return;
+ }
+ state->len = ret;
+
+ state->src = tsocket_address_create(state,
+ &tsocket_address_bsd_ops,
+ &bsda,
+ struct tsocket_address_bsd,
+ __location__ "bsd_recvfrom");
+ if (tevent_req_nomem(state->src, req)) {
+ return;
+ }
+
+ ZERO_STRUCTP(bsda);
+
+ sa = &bsda->u.sa;
+ sa_len = sizeof(bsda->u.ss);
+
+ ret = recvfrom(bsds->fd, state->buf, state->len, 0, sa, &sa_len);
+ err = tsocket_error_from_errno(ret, errno, &retry);
+ if (retry) {
+ /* retry later */
+ return;
+ }
+ if (tevent_req_error(req, err)) {
+ return;
+ }
+
+ if (ret != state->len) {
+ tevent_req_error(req, EIO);
+ return;
+ }
+
+ tevent_req_done(req);
+}
+
+static ssize_t tdgram_bsd_recvfrom_recv(struct tevent_req *req,
+ int *perrno,
+ TALLOC_CTX *mem_ctx,
+ uint8_t **buf,
+ struct tsocket_address **src)
+{
+ struct tdgram_bsd_recvfrom_state *state = tevent_req_data(req,
+ struct tdgram_bsd_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_bsd_sendto_state {
+ struct tdgram_context *dgram;
+
+ const uint8_t *buf;
+ size_t len;
+ const struct tsocket_address *dst;
+
+ ssize_t ret;
+};
+
+static int tdgram_bsd_sendto_destructor(struct tdgram_bsd_sendto_state *state)
+{
+ struct tdgram_bsd *bsds = tdgram_context_data(state->dgram,
+ struct tdgram_bsd);
+
+ bsds->write_req = NULL;
+ tdgram_bsd_set_writeable_handler(bsds, NULL, NULL, NULL);
+ return 0;
+}
+
+static void tdgram_bsd_sendto_handler(void *private_data);
+
+static struct tevent_req *tdgram_bsd_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_bsd_sendto_state *state;
+ struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
+ int ret;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tdgram_bsd_sendto_state);
+ if (!req) {
+ return NULL;
+ }
+
+ state->dgram = dgram;
+ state->buf = buf;
+ state->len = len;
+ state->dst = dst;
+ state->ret = -1;
+
+ if (bsds->write_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+ bsds->write_req = req;
+
+ talloc_set_destructor(state, tdgram_bsd_sendto_destructor);
+
+ if (bsds->fd == -1) {
+ tevent_req_error(req, ENOTCONN);
+ goto post;
+ }
+
+ ret = tdgram_bsd_set_writeable_handler(bsds, ev,
+ tdgram_bsd_sendto_handler,
+ req);
+ if (ret == -1) {
+ tevent_req_error(req, errno);
+ goto post;
+ }
+
+ return req;
+
+ post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static void tdgram_bsd_sendto_handler(void *private_data)
+{
+ struct tevent_req *req = talloc_get_type_abort(private_data,
+ struct tevent_req);
+ struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
+ struct tdgram_bsd_sendto_state);
+ struct tdgram_context *dgram = state->dgram;
+ struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
+ struct sockaddr *sa = NULL;
+ socklen_t sa_len = 0;
+ ssize_t ret;
+ int err;
+ bool retry;
+
+ if (state->dst) {
+ struct tsocket_address_bsd *bsda =
+ talloc_get_type(state->dst->private_data,
+ struct tsocket_address_bsd);
+
+ sa = &bsda->u.sa;
+ sa_len = sizeof(bsda->u.ss);
+ }
+
+ ret = sendto(bsds->fd, state->buf, state->len, 0, sa, sa_len);
+ err = tsocket_error_from_errno(ret, errno, &retry);
+ if (retry) {
+ /* retry later */
+ return;
+ }
+ if (tevent_req_error(req, err)) {
+ return;
+ }
+
+ state->ret = ret;
+
+ tevent_req_done(req);
+}
+
+static ssize_t tdgram_bsd_sendto_recv(struct tevent_req *req, int *perrno)
+{
+ struct tdgram_bsd_sendto_state *state = tevent_req_data(req,
+ struct tdgram_bsd_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_bsd_disconnect_state {
+ int ret;
+};
+
+static struct tevent_req *tdgram_bsd_disconnect_send(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram)
+{
+ struct tdgram_bsd *bsds = tdgram_context_data(dgram, struct tdgram_bsd);
+ struct tevent_req *req;
+ struct tdgram_bsd_disconnect_state *state;
+ int ret;
+ int err;
+ bool dummy;
+
+ req = tevent_req_create(mem_ctx, &state,
+ struct tdgram_bsd_disconnect_state);
+ if (req == NULL) {
+ return NULL;
+ }
+ state->ret = -1;
+
+ if (bsds->read_req || bsds->write_req) {
+ tevent_req_error(req, EBUSY);
+ goto post;
+ }
+
+ if (bsds->fd == -1) {
+ tevent_req_error(req, ENOTCONN);
+ goto post;
+ }
+
+ state->ret = close(bsds->fd);
+ bsds->fd = -1;
+ err = tsocket_error_from_errno(ret, errno, &dummy);
+ if (tevent_req_error(req, err)) {
+ goto post;
+ }
+
+ tevent_req_done(req);
+post:
+ tevent_req_post(req, ev);
+ return req;
+}
+
+static int tdgram_bsd_disconnect_recv(struct tevent_req *req,
+ int *perrno)
+{
+ struct tdgram_bsd_disconnect_state *state = tevent_req_data(req,
+ struct tdgram_bsd_disconnect_state);
+ int ret;
+
+ ret = tsocket_simple_int_recv(req, perrno);
+ if (ret == 0) {
+ ret = state->ret;
+ }
+
+ tevent_req_received(req);
+ return ret;
+}
+
+static const struct tdgram_context_ops tdgram_bsd_ops = {
+ .name = "bsd",
+
+ .recvfrom_send = tdgram_bsd_recvfrom_send,
+ .recvfrom_recv = tdgram_bsd_recvfrom_recv,
+
+ .sendto_send = tdgram_bsd_sendto_send,
+ .sendto_recv = tdgram_bsd_sendto_recv,
+
+ .disconnect_send = tdgram_bsd_disconnect_send,
+ .disconnect_recv = tdgram_bsd_disconnect_recv,
+};
+
+static int tdgram_bsd_destructor(struct tdgram_bsd *bsds)
+{
+ TALLOC_FREE(bsds->fde);
+ if (bsds->fd != -1) {
+ close(bsds->fd);
+ bsds->fd = -1;
+ }
+ return 0;
+}
+
+static int tdgram_bsd_dgram_socket(const struct tsocket_address *local,
+ const struct tsocket_address *remote,
+ TALLOC_CTX *mem_ctx,
+ struct tdgram_context **_dgram,
+ const char *location)
+{
+ struct tsocket_address_bsd *lbsda =
+ talloc_get_type_abort(local->private_data,
+ struct tsocket_address_bsd);
+ struct tsocket_address_bsd *rbsda = NULL;
+ struct tdgram_context *dgram;
+ struct tdgram_bsd *bsds;
+ int fd;
+ int ret;
+ bool do_bind = false;
+ bool do_reuseaddr = false;
+
+ if (remote) {
+ rbsda = talloc_get_type_abort(remote->private_data,
+ struct tsocket_address_bsd);
+ }
+
+ switch (lbsda->u.sa.sa_family) {
+ case AF_UNIX:
+ if (lbsda->u.un.sun_path[0] != 0) {
+ do_reuseaddr = true;
+ do_bind = true;
+ }
+ break;
+ case AF_INET:
+ if (lbsda->u.in.sin_port != 0) {
+ do_reuseaddr = true;
+ do_bind = true;
+ }
+ if (lbsda->u.in.sin_addr.s_addr == INADDR_ANY) {
+ do_bind = true;
+ }
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ if (lbsda->u.in6.sin6_port != 0) {
+ do_reuseaddr = true;
+ do_bind = true;
+ }
+ if (memcmp(&in6addr_any,
+ &lbsda->u.in6.sin6_addr,
+ sizeof(in6addr_any)) != 0) {
+ do_bind = true;
+ }
+ break;
+#endif
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ fd = socket(lbsda->u.sa.sa_family, SOCK_DGRAM, 0);
+ if (fd < 0) {
+ return fd;
+ }
+
+ fd = tsocket_bsd_common_prepare_fd(fd, true);
+ if (fd < 0) {
+ return fd;
+ }
+
+ dgram = tdgram_context_create(mem_ctx,
+ &tdgram_bsd_ops,
+ &bsds,
+ struct tdgram_bsd,
+ location);
+ if (!dgram) {
+ int saved_errno = errno;
+ close(fd);
+ errno = saved_errno;
+ return -1;
+ }
+ ZERO_STRUCTP(bsds);
+ bsds->fd = fd;
+ talloc_set_destructor(bsds, tdgram_bsd_destructor);
+
+ if (lbsda->broadcast) {
+ int val = 1;
+
+ ret = setsockopt(fd, SOL_SOCKET, SO_BROADCAST,
+ (const void *)&val, sizeof(val));
+ if (ret == -1) {
+ int saved_errno = errno;
+ talloc_free(dgram);
+ errno = saved_errno;
+ return ret;
+ }
+ }
+
+ if (do_reuseaddr) {
+ int val = 1;
+
+ ret = setsockopt(fd, SOL_SOCKET, SO_REUSEADDR,
+ (const void *)&val, sizeof(val));
+ if (ret == -1) {
+ int saved_errno = errno;
+ talloc_free(dgram);
+ errno = saved_errno;
+ return ret;
+ }
+ }
+
+ if (do_bind) {
+ ret = bind(fd, &lbsda->u.sa, sizeof(lbsda->u.ss));
+ if (ret == -1) {
+ int saved_errno = errno;
+ talloc_free(dgram);
+ errno = saved_errno;
+ return ret;
+ }
+ }
+
+ if (rbsda) {
+ ret = connect(fd, &rbsda->u.sa, sizeof(rbsda->u.ss));
+ if (ret == -1) {
+ int saved_errno = errno;
+ talloc_free(dgram);
+ errno = saved_errno;
+ return ret;
+ }
+ }
+
+ *_dgram = dgram;
+ return 0;
+}
+
+int _tdgram_inet_udp_socket(const struct tsocket_address *local,
+ const struct tsocket_address *remote,
+ TALLOC_CTX *mem_ctx,
+ struct tdgram_context **dgram,
+ const char *location)
+{
+ struct tsocket_address_bsd *lbsda =
+ talloc_get_type_abort(local->private_data,
+ struct tsocket_address_bsd);
+ int ret;
+
+ switch (lbsda->u.sa.sa_family) {
+ case AF_INET:
+ break;
+#ifdef HAVE_IPV6
+ case AF_INET6:
+ break;
+#endif
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ ret = tdgram_bsd_dgram_socket(local, remote, mem_ctx, dgram, location);
+
+ return ret;
+}
+
+int _tdgram_unix_dgram_socket(const struct tsocket_address *local,
+ const struct tsocket_address *remote,
+ TALLOC_CTX *mem_ctx,
+ struct tdgram_context **dgram,
+ const char *location)
+{
+ struct tsocket_address_bsd *lbsda =
+ talloc_get_type_abort(local->private_data,
+ struct tsocket_address_bsd);
+ int ret;
+
+ switch (lbsda->u.sa.sa_family) {
+ case AF_UNIX:
+ break;
+ default:
+ errno = EINVAL;
+ return -1;
+ }
+
+ ret = tdgram_bsd_dgram_socket(local, remote, mem_ctx, dgram, location);
+
+ return ret;
+}
+
diff --git a/lib/tsocket/tsocket_internal.h b/lib/tsocket/tsocket_internal.h
index e4a4908f3e..d1f240eba0 100644
--- a/lib/tsocket/tsocket_internal.h
+++ b/lib/tsocket/tsocket_internal.h
@@ -149,6 +149,47 @@ struct tsocket_address *_tsocket_address_create(TALLOC_CTX *mem_ctx,
_tsocket_address_create(mem_ctx, ops, state, sizeof(type), \
#type, location)
+struct tdgram_context_ops {
+ const char *name;
+
+ struct tevent_req *(*recvfrom_send)(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram);
+ ssize_t (*recvfrom_recv)(struct tevent_req *req,
+ int *perrno,
+ TALLOC_CTX *mem_ctx,
+ uint8_t **buf,
+ struct tsocket_address **src);
+
+ struct tevent_req *(*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);
+ ssize_t (*sendto_recv)(struct tevent_req *req,
+ int *perrno);
+
+ struct tevent_req *(*disconnect_send)(TALLOC_CTX *mem_ctx,
+ struct tevent_context *ev,
+ struct tdgram_context *dgram);
+ int (*disconnect_recv)(struct tevent_req *req,
+ int *perrno);
+};
+
+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);
+#define tdgram_context_create(mem_ctx, ops, state, type, location) \
+ _tdgram_context_create(mem_ctx, ops, state, sizeof(type), \
+ #type, location)
+
+void *_tdgram_context_data(struct tdgram_context *dgram);
+#define tdgram_context_data(_req, _type) \
+ talloc_get_type_abort(_tdgram_context_data(_req), _type)
+
int tsocket_error_from_errno(int ret, int sys_errno, bool *retry);
int tsocket_simple_int_recv(struct tevent_req *req, int *perrno);
int tsocket_common_prepare_fd(int fd, bool high_fd);
generated by cgit (git 2.34.1) at 2024-11-27 05:07:47 +0000