#pragma once /*** This file is part of systemd. Copyright 2013 Tom Gundersen <teg@jklm.no> systemd 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 2.1 of the License, or (at your option) any later version. systemd 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 systemd; If not, see <http://www.gnu.org/licenses/>. ***/ #include <linux/netlink.h> #include "sd-netlink.h" #include "list.h" #include "netlink-types.h" #include "prioq.h" #include "refcnt.h" #define RTNL_DEFAULT_TIMEOUT ((usec_t) (25 * USEC_PER_SEC)) #define RTNL_WQUEUE_MAX 1024 #define RTNL_RQUEUE_MAX 64*1024 #define RTNL_CONTAINER_DEPTH 32 struct reply_callback { sd_netlink_message_handler_t callback; void *userdata; usec_t timeout; uint64_t serial; unsigned prioq_idx; }; struct match_callback { sd_netlink_message_handler_t callback; uint16_t type; void *userdata; LIST_FIELDS(struct match_callback, match_callbacks); }; struct sd_netlink { RefCount n_ref; int fd; union { struct sockaddr sa; struct sockaddr_nl nl; } sockaddr; Hashmap *broadcast_group_refs; bool broadcast_group_dont_leave:1; /* until we can rely on 4.2 */ sd_netlink_message **rqueue; unsigned rqueue_size; size_t rqueue_allocated; sd_netlink_message **rqueue_partial; unsigned rqueue_partial_size; size_t rqueue_partial_allocated; struct nlmsghdr *rbuffer; size_t rbuffer_allocated; bool processing:1; uint32_t serial; struct Prioq *reply_callbacks_prioq; Hashmap *reply_callbacks; LIST_HEAD(struct match_callback, match_callbacks); pid_t original_pid; sd_event_source *io_event_source; sd_event_source *time_event_source; sd_event_source *exit_event_source; sd_event *event; }; struct netlink_attribute { size_t offset; /* offset from hdr to attribute */ bool nested:1; bool net_byteorder:1; }; struct netlink_container { const struct NLTypeSystem *type_system; /* the type system of the container */ size_t offset; /* offset from hdr to the start of the container */ struct netlink_attribute *attributes; unsigned short n_attributes; /* number of attributes in container */ }; struct sd_netlink_message { RefCount n_ref; sd_netlink *rtnl; struct nlmsghdr *hdr; struct netlink_container containers[RTNL_CONTAINER_DEPTH]; unsigned n_containers; /* number of containers */ bool sealed:1; bool broadcast:1; sd_netlink_message *next; /* next in a chain of multi-part messages */ }; int message_new(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t type); int message_new_empty(sd_netlink *rtnl, sd_netlink_message **ret); int socket_open(int family); int socket_bind(sd_netlink *nl); int socket_broadcast_group_ref(sd_netlink *nl, unsigned group); int socket_broadcast_group_unref(sd_netlink *nl, unsigned group); int socket_write_message(sd_netlink *nl, sd_netlink_message *m); int socket_read_message(sd_netlink *nl); int rtnl_rqueue_make_room(sd_netlink *rtnl); int rtnl_rqueue_partial_make_room(sd_netlink *rtnl); /* Make sure callbacks don't destroy the rtnl connection */ #define NETLINK_DONT_DESTROY(rtnl) \ _cleanup_(sd_netlink_unrefp) _unused_ sd_netlink *_dont_destroy_##rtnl = sd_netlink_ref(rtnl)