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-rw-r--r--source3/rpc_server/srv_pipe_hnd.c172
1 files changed, 144 insertions, 28 deletions
diff --git a/source3/rpc_server/srv_pipe_hnd.c b/source3/rpc_server/srv_pipe_hnd.c
index 822d50aa54..b892755396 100644
--- a/source3/rpc_server/srv_pipe_hnd.c
+++ b/source3/rpc_server/srv_pipe_hnd.c
@@ -913,9 +913,74 @@ static int close_internal_rpc_pipe_hnd(struct pipes_struct *p)
bool fsp_is_np(struct files_struct *fsp)
{
- return ((fsp != NULL)
- && (fsp->fake_file_handle != NULL)
- && (fsp->fake_file_handle->type == FAKE_FILE_TYPE_NAMED_PIPE));
+ enum FAKE_FILE_TYPE type;
+
+ if ((fsp == NULL) || (fsp->fake_file_handle == NULL)) {
+ return false;
+ }
+
+ type = fsp->fake_file_handle->type;
+
+ return ((type == FAKE_FILE_TYPE_NAMED_PIPE)
+ || (type == FAKE_FILE_TYPE_NAMED_PIPE_PROXY));
+}
+
+struct np_proxy_state {
+ int fd;
+};
+
+static int np_proxy_state_destructor(struct np_proxy_state *state)
+{
+ if (state->fd != -1) {
+ close(state->fd);
+ }
+ return 0;
+}
+
+static struct np_proxy_state *make_external_rpc_pipe_p(TALLOC_CTX *mem_ctx,
+ const char *pipe_name,
+ struct auth_serversupplied_info *server_info)
+{
+ struct np_proxy_state *result;
+ struct sockaddr_un addr;
+ char *socket_path;
+
+ result = talloc(mem_ctx, struct np_proxy_state);
+ if (result == NULL) {
+ DEBUG(0, ("talloc failed\n"));
+ return NULL;
+ }
+
+ result->fd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (result->fd == -1) {
+ DEBUG(10, ("socket(2) failed: %s\n", strerror(errno)));
+ goto fail;
+ }
+ talloc_set_destructor(result, np_proxy_state_destructor);
+
+ ZERO_STRUCT(addr);
+ addr.sun_family = AF_UNIX;
+
+ socket_path = talloc_asprintf(talloc_tos(), "%s/%s",
+ get_dyn_NCALRPCDIR(), "DEFAULT");
+ if (socket_path == NULL) {
+ DEBUG(0, ("talloc_asprintf failed\n"));
+ goto fail;
+ }
+ strncpy(addr.sun_path, socket_path, sizeof(addr.sun_path));
+ TALLOC_FREE(socket_path);
+
+ if (sys_connect(result->fd, (struct sockaddr *)&addr) == -1) {
+ DEBUG(0, ("connect(%s) failed: %s\n", addr.sun_path,
+ strerror(errno)));
+ goto fail;
+ }
+
+ return result;
+
+ fail:
+ TALLOC_FREE(result);
+ return NULL;
}
NTSTATUS np_open(struct smb_request *smb_req, struct connection_struct *conn,
@@ -923,13 +988,9 @@ NTSTATUS np_open(struct smb_request *smb_req, struct connection_struct *conn,
{
NTSTATUS status;
struct files_struct *fsp;
- struct pipes_struct *p;
-
- /* See if it is one we want to handle. */
+ const char **proxy_list;
- if (!is_known_pipename(name)) {
- return NT_STATUS_OBJECT_NAME_NOT_FOUND;
- }
+ proxy_list = lp_parm_string_list(SNUM(conn), "np", "proxy", NULL);
status = file_new(smb_req, conn, &fsp);
if (!NT_STATUS_IS_OK(status)) {
@@ -949,16 +1010,36 @@ NTSTATUS np_open(struct smb_request *smb_req, struct connection_struct *conn,
file_free(smb_req, fsp);
return NT_STATUS_NO_MEMORY;
}
- fsp->fake_file_handle->type = FAKE_FILE_TYPE_NAMED_PIPE;
- p = make_internal_rpc_pipe_p(fsp->fake_file_handle, name,
- conn->client_address, conn->server_info,
- smb_req->vuid);
- if (p == NULL) {
+ if ((proxy_list != NULL) && str_list_check_ci(proxy_list, name)) {
+ struct np_proxy_state *p;
+
+ p = make_external_rpc_pipe_p(fsp->fake_file_handle, name,
+ conn->server_info);
+
+ fsp->fake_file_handle->type = FAKE_FILE_TYPE_NAMED_PIPE_PROXY;
+ fsp->fake_file_handle->private_data = p;
+ } else {
+ struct pipes_struct *p;
+
+ if (!is_known_pipename(name)) {
+ file_free(smb_req, fsp);
+ return NT_STATUS_OBJECT_NAME_NOT_FOUND;
+ }
+
+ p = make_internal_rpc_pipe_p(fsp->fake_file_handle, name,
+ conn->client_address,
+ conn->server_info,
+ smb_req->vuid);
+
+ fsp->fake_file_handle->type = FAKE_FILE_TYPE_NAMED_PIPE;
+ fsp->fake_file_handle->private_data = p;
+ }
+
+ if (fsp->fake_file_handle->private_data == NULL) {
file_free(smb_req, fsp);
return NT_STATUS_PIPE_NOT_AVAILABLE;
}
- fsp->fake_file_handle->private_data = p;
*pfsp = fsp;
@@ -968,20 +1049,33 @@ NTSTATUS np_open(struct smb_request *smb_req, struct connection_struct *conn,
NTSTATUS np_write(struct files_struct *fsp, uint8_t *data, size_t len,
ssize_t *nwritten)
{
- struct pipes_struct *p;
-
if (!fsp_is_np(fsp)) {
return NT_STATUS_INVALID_HANDLE;
}
- p = talloc_get_type_abort(
- fsp->fake_file_handle->private_data, struct pipes_struct);
-
DEBUG(6, ("np_write: %x name: %s len: %d\n", (int)fsp->fnum,
fsp->fsp_name, (int)len));
dump_data(50, data, len);
- *nwritten = write_to_internal_pipe(p, (char *)data, len);
+ switch (fsp->fake_file_handle->type) {
+ case FAKE_FILE_TYPE_NAMED_PIPE: {
+ struct pipes_struct *p = talloc_get_type_abort(
+ fsp->fake_file_handle->private_data,
+ struct pipes_struct);
+ *nwritten = write_to_internal_pipe(p, (char *)data, len);
+ break;
+ }
+ case FAKE_FILE_TYPE_NAMED_PIPE_PROXY: {
+ struct np_proxy_state *p = talloc_get_type_abort(
+ fsp->fake_file_handle->private_data,
+ struct np_proxy_state);
+ *nwritten = write_data(p->fd, (char *)data, len);
+ break;
+ }
+ default:
+ return NT_STATUS_INVALID_HANDLE;
+ break;
+ }
return ((*nwritten) >= 0)
? NT_STATUS_OK : NT_STATUS_UNEXPECTED_IO_ERROR;
@@ -990,19 +1084,41 @@ NTSTATUS np_write(struct files_struct *fsp, uint8_t *data, size_t len,
NTSTATUS np_read(struct files_struct *fsp, uint8_t *data, size_t len,
ssize_t *nread, bool *is_data_outstanding)
{
- struct pipes_struct *p;
-
if (!fsp_is_np(fsp)) {
return NT_STATUS_INVALID_HANDLE;
}
- p = talloc_get_type_abort(
- fsp->fake_file_handle->private_data, struct pipes_struct);
+ switch (fsp->fake_file_handle->type) {
+ case FAKE_FILE_TYPE_NAMED_PIPE: {
+ struct pipes_struct *p = talloc_get_type_abort(
+ fsp->fake_file_handle->private_data,
+ struct pipes_struct);
+ *nread = read_from_internal_pipe(p, (char *)data, len,
+ is_data_outstanding);
+ break;
+ }
+ case FAKE_FILE_TYPE_NAMED_PIPE_PROXY: {
+ struct np_proxy_state *p = talloc_get_type_abort(
+ fsp->fake_file_handle->private_data,
+ struct np_proxy_state);
+ int available = 0;
+
+ *nread = sys_read(p->fd, (char *)data, len);
+
+ /*
+ * We don't look at the ioctl result. We don't really care
+ * if there is data available, because this is racy anyway.
+ */
+ ioctl(p->fd, FIONREAD, &available);
+ *is_data_outstanding = (available > 0);
- *nread = read_from_internal_pipe(p, (char *)data, len,
- is_data_outstanding);
+ break;
+ }
+ default:
+ return NT_STATUS_INVALID_HANDLE;
+ break;
+ }
return ((*nread) >= 0)
? NT_STATUS_OK : NT_STATUS_UNEXPECTED_IO_ERROR;
-
}