/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/ #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 "refcnt.h" #include "prioq.h" #include "list.h" #include "sd-rtnl.h" #include "rtnl-types.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_rtnl_message_handler_t callback; void *userdata; usec_t timeout; uint64_t serial; unsigned prioq_idx; }; struct match_callback { sd_rtnl_message_handler_t callback; uint16_t type; void *userdata; LIST_FIELDS(struct match_callback, match_callbacks); }; struct sd_rtnl { RefCount n_ref; int fd; union { struct sockaddr sa; struct sockaddr_nl nl; } sockaddr; sd_rtnl_message **rqueue; unsigned rqueue_size; size_t rqueue_allocated; sd_rtnl_message **rqueue_partial; unsigned rqueue_partial_size; size_t rqueue_partial_allocated; sd_rtnl_message **wqueue; unsigned wqueue_size; size_t wqueue_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 sd_rtnl_message { RefCount n_ref; sd_rtnl *rtnl; struct nlmsghdr *hdr; const struct NLTypeSystem *(container_type_system[RTNL_CONTAINER_DEPTH]); /* the type of the container and all its parents */ size_t container_offsets[RTNL_CONTAINER_DEPTH]; /* offset from hdr to each container's start */ unsigned n_containers; /* number of containers */ size_t next_rta_offset; /* offset from hdr to next rta */ size_t *rta_offset_tb[RTNL_CONTAINER_DEPTH]; unsigned short rta_tb_size[RTNL_CONTAINER_DEPTH]; bool sealed:1; sd_rtnl_message *next; /* next in a chain of multi-part messages */ }; int message_new(sd_rtnl *rtnl, sd_rtnl_message **ret, uint16_t type); int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m); int socket_read_message(sd_rtnl *nl); int rtnl_rqueue_make_room(sd_rtnl *rtnl); int rtnl_rqueue_partial_make_room(sd_rtnl *rtnl); int rtnl_message_read_internal(sd_rtnl_message *m, unsigned short type, void **data); int rtnl_message_parse(sd_rtnl_message *m, size_t **rta_offset_tb, unsigned short *rta_tb_size, int max, struct rtattr *rta, unsigned int rt_len); /* Make sure callbacks don't destroy the rtnl connection */ #define RTNL_DONT_DESTROY(rtnl) \ _cleanup_rtnl_unref_ _unused_ sd_rtnl *_dont_destroy_##rtnl = sd_rtnl_ref(rtnl)