*/
#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;
struct tsocket_address **_addr,
const char *location)
{
- struct sockaddr_un sun;
- void *p = &sun;
+ struct sockaddr_un un;
+ void *p = &un;
int ret;
if (!path) {
path = "";
}
- ZERO_STRUCT(sun);
- sun.sun_family = AF_UNIX;
- strncpy(sun.sun_path, path, sizeof(sun.sun_path));
+ ZERO_STRUCT(un);
+ un.sun_family = AF_UNIX;
+ strncpy(un.sun_path, path, sizeof(un.sun_path));
ret = _tsocket_address_bsd_from_sockaddr(mem_ctx,
(struct sockaddr *)p,
- sizeof(sun),
+ sizeof(un),
_addr,
location);
.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;
+}
+
git.samba.org / ira / wip.git / blobdiff