/* Unix SMB/CIFS implementation. implements a non-blocking connect operation that is aware of the samba4 events system Copyright (C) Andrew Tridgell 2005 Copyright (C) Volker Lendecke 2005 This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" #include "lib/socket/socket.h" #include "lib/events/events.h" #include "libcli/composite/composite.h" struct connect_state { struct socket_context *sock; const struct socket_address *my_address; const struct socket_address *server_address; uint32_t flags; }; static void socket_connect_handler(struct tevent_context *ev, struct tevent_fd *fde, uint16_t flags, void *private_data); /* call the real socket_connect() call, and setup event handler */ static void socket_send_connect(struct composite_context *result) { struct tevent_fd *fde; struct connect_state *state = talloc_get_type(result->private_data, struct connect_state); result->status = socket_connect(state->sock, state->my_address, state->server_address, state->flags); if (NT_STATUS_IS_ERR(result->status) && !NT_STATUS_EQUAL(result->status, NT_STATUS_MORE_PROCESSING_REQUIRED)) { composite_error(result, result->status); return; } fde = event_add_fd(result->event_ctx, result, socket_get_fd(state->sock), EVENT_FD_READ|EVENT_FD_WRITE, socket_connect_handler, result); composite_nomem(fde, result); } /* send a socket connect, potentially doing some name resolution first */ struct composite_context *socket_connect_send(struct socket_context *sock, struct socket_address *my_address, struct socket_address *server_address, uint32_t flags, struct tevent_context *event_ctx) { struct composite_context *result; struct connect_state *state; result = composite_create(sock, event_ctx); if (result == NULL) return NULL; state = talloc_zero(result, struct connect_state); if (composite_nomem(state, result)) return result; result->private_data = state; state->sock = talloc_reference(state, sock); if (composite_nomem(state->sock, result)) return result; if (my_address) { void *ref = talloc_reference(state, my_address); if (composite_nomem(ref, result)) { return result; } state->my_address = my_address; } { void *ref = talloc_reference(state, server_address); if (composite_nomem(ref, result)) { return result; } state->server_address = server_address; } state->flags = flags; set_blocking(socket_get_fd(sock), false); socket_send_connect(result); return result; } /* handle write events on connect completion */ static void socket_connect_handler(struct tevent_context *ev, struct tevent_fd *fde, uint16_t flags, void *private_data) { struct composite_context *result = talloc_get_type(private_data, struct composite_context); struct connect_state *state = talloc_get_type(result->private_data, struct connect_state); result->status = socket_connect_complete(state->sock, state->flags); if (!composite_is_ok(result)) return; composite_done(result); } /* wait for a socket_connect_send() to finish */ NTSTATUS socket_connect_recv(struct composite_context *result) { NTSTATUS status = composite_wait(result); talloc_free(result); return status; } /* like socket_connect() but takes an event context, doing a semi-async connect */ NTSTATUS socket_connect_ev(struct socket_context *sock, struct socket_address *my_address, struct socket_address *server_address, uint32_t flags, struct tevent_context *ev) { struct composite_context *ctx; ctx = socket_connect_send(sock, my_address, server_address, flags, ev); return socket_connect_recv(ctx); }