src/systemd/sd-netlink.h

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 #ifndef foosdnetlinkhfoo
   3 #define foosdnetlinkhfoo
   4
   5 /***
   6   systemd is free software; you can redistribute it and/or modify it
   7   under the terms of the GNU Lesser General Public License as published by
   8   the Free Software Foundation; either version 2.1 of the License, or
   9   (at your option) any later version.
  10
  11   systemd is distributed in the hope that it will be useful, but
  12   WITHOUT ANY WARRANTY; without even the implied warranty of
  13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  14   Lesser General Public License for more details.
  15
  16   You should have received a copy of the GNU Lesser General Public License
  17   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  18 ***/
  19
  20 #include <inttypes.h>
  21 #include <linux/neighbour.h>
  22 #include <linux/rtnetlink.h>
  23 #include <net/ethernet.h>
  24 #include <netinet/ether.h>
  25 #include <netinet/in.h>
  26
  27 #include "sd-event.h"
  28
  29 #include "_sd-common.h"
  30
  31 _SD_BEGIN_DECLARATIONS;
  32
  33 typedef struct sd_netlink sd_netlink;
  34 typedef struct sd_genl_socket sd_genl_socket;
  35 typedef struct sd_netlink_message sd_netlink_message;
  36 typedef struct sd_netlink_slot sd_netlink_slot;
  37 typedef enum {SD_GENL_ID_CTRL, SD_GENL_WIREGUARD, SD_GENL_FOU} sd_genl_family;
  38
  39 /* callback */
  40
  41 typedef int (*sd_netlink_message_handler_t)(sd_netlink *nl, sd_netlink_message *m, void *userdata);
  42 typedef void (*sd_netlink_destroy_t)(void *userdata);
  43
  44 /* bus */
  45 int sd_netlink_new_from_netlink(sd_netlink **nl, int fd);
  46 int sd_netlink_open(sd_netlink **nl);
  47 int sd_netlink_open_fd(sd_netlink **nl, int fd);
  48 int sd_netlink_inc_rcvbuf(sd_netlink *nl, const size_t size);
  49
  50 sd_netlink *sd_netlink_ref(sd_netlink *nl);
  51 sd_netlink *sd_netlink_unref(sd_netlink *nl);
  52
  53 int sd_netlink_send(sd_netlink *nl, sd_netlink_message *message, uint32_t *serial);
  54 int sd_netlink_call_async(sd_netlink *nl, sd_netlink_slot **ret_slot, sd_netlink_message *message,
  55                           sd_netlink_message_handler_t callback, sd_netlink_destroy_t destoy_callback,
  56                           void *userdata, uint64_t usec, const char *description);
  57 int sd_netlink_call(sd_netlink *nl, sd_netlink_message *message, uint64_t timeout,
  58                     sd_netlink_message **reply);
  59
  60 int sd_netlink_get_events(sd_netlink *nl);
  61 int sd_netlink_get_timeout(sd_netlink *nl, uint64_t *timeout);
  62 int sd_netlink_process(sd_netlink *nl, sd_netlink_message **ret);
  63 int sd_netlink_wait(sd_netlink *nl, uint64_t timeout);
  64
  65 int sd_netlink_add_match(sd_netlink *nl, sd_netlink_slot **ret_slot, uint16_t match,
  66                          sd_netlink_message_handler_t callback,
  67                          sd_netlink_destroy_t destroy_callback,
  68                          void *userdata, const char *description);
  69
  70 int sd_netlink_attach_event(sd_netlink *nl, sd_event *e, int64_t priority);
  71 int sd_netlink_detach_event(sd_netlink *nl);
  72
  73 int sd_netlink_message_append_string(sd_netlink_message *m, unsigned short type, const char *data);
  74 int sd_netlink_message_append_flag(sd_netlink_message *m, unsigned short type);
  75 int sd_netlink_message_append_u8(sd_netlink_message *m, unsigned short type, uint8_t data);
  76 int sd_netlink_message_append_u16(sd_netlink_message *m, unsigned short type, uint16_t data);
  77 int sd_netlink_message_append_u32(sd_netlink_message *m, unsigned short type, uint32_t data);
  78 int sd_netlink_message_append_data(sd_netlink_message *m, unsigned short type, const void *data, size_t len);
  79 int sd_netlink_message_append_in_addr(sd_netlink_message *m, unsigned short type, const struct in_addr *data);
  80 int sd_netlink_message_append_in6_addr(sd_netlink_message *m, unsigned short type, const struct in6_addr *data);
  81 int sd_netlink_message_append_ether_addr(sd_netlink_message *m, unsigned short type, const struct ether_addr *data);
  82 int sd_netlink_message_append_cache_info(sd_netlink_message *m, unsigned short type, const struct ifa_cacheinfo *info);
  83
  84 int sd_netlink_message_open_container(sd_netlink_message *m, unsigned short type);
  85 int sd_netlink_message_open_container_union(sd_netlink_message *m, unsigned short type, const char *key);
  86 int sd_netlink_message_close_container(sd_netlink_message *m);
  87
  88 int sd_netlink_message_read(sd_netlink_message *m, unsigned short type, size_t size, void *data);
  89 int sd_netlink_message_read_string(sd_netlink_message *m, unsigned short type, const char **data);
  90 int sd_netlink_message_read_u8(sd_netlink_message *m, unsigned short type, uint8_t *data);
  91 int sd_netlink_message_read_u16(sd_netlink_message *m, unsigned short type, uint16_t *data);
  92 int sd_netlink_message_read_u32(sd_netlink_message *m, unsigned short type, uint32_t *data);
  93 int sd_netlink_message_read_ether_addr(sd_netlink_message *m, unsigned short type, struct ether_addr *data);
  94 int sd_netlink_message_read_cache_info(sd_netlink_message *m, unsigned short type, struct ifa_cacheinfo *info);
  95 int sd_netlink_message_read_in_addr(sd_netlink_message *m, unsigned short type, struct in_addr *data);
  96 int sd_netlink_message_read_in6_addr(sd_netlink_message *m, unsigned short type, struct in6_addr *data);
  97 int sd_netlink_message_enter_container(sd_netlink_message *m, unsigned short type);
  98 int sd_netlink_message_exit_container(sd_netlink_message *m);
  99
 100 int sd_netlink_message_open_array(sd_netlink_message *m, uint16_t type);
 101 int sd_netlink_message_cancel_array(sd_netlink_message *m);
 102
 103 int sd_netlink_message_rewind(sd_netlink_message *m);
 104
 105 sd_netlink_message *sd_netlink_message_next(sd_netlink_message *m);
 106
 107 sd_netlink_message *sd_netlink_message_ref(sd_netlink_message *m);
 108 sd_netlink_message *sd_netlink_message_unref(sd_netlink_message *m);
 109
 110 int sd_netlink_message_request_dump(sd_netlink_message *m, int dump);
 111 int sd_netlink_message_is_error(sd_netlink_message *m);
 112 int sd_netlink_message_get_errno(sd_netlink_message *m);
 113 int sd_netlink_message_get_type(sd_netlink_message *m, uint16_t *type);
 114 int sd_netlink_message_set_flags(sd_netlink_message *m, uint16_t flags);
 115 int sd_netlink_message_is_broadcast(sd_netlink_message *m);
 116
 117 /* rtnl */
 118
 119 int sd_rtnl_message_new_link(sd_netlink *nl, sd_netlink_message **ret, uint16_t msg_type, int index);
 120 int sd_rtnl_message_new_addr_update(sd_netlink *nl, sd_netlink_message **ret, int index, int family);
 121 int sd_rtnl_message_new_addr(sd_netlink *nl, sd_netlink_message **ret, uint16_t msg_type, int index, int family);
 122 int sd_rtnl_message_new_route(sd_netlink *nl, sd_netlink_message **ret, uint16_t nlmsg_type, int rtm_family, unsigned char rtm_protocol);
 123 int sd_rtnl_message_new_neigh(sd_netlink *nl, sd_netlink_message **ret, uint16_t msg_type, int index, int nda_family);
 124
 125 int sd_rtnl_message_get_family(sd_netlink_message *m, int *family);
 126
 127 int sd_rtnl_message_addr_set_prefixlen(sd_netlink_message *m, unsigned char prefixlen);
 128 int sd_rtnl_message_addr_set_scope(sd_netlink_message *m, unsigned char scope);
 129 int sd_rtnl_message_addr_set_flags(sd_netlink_message *m, unsigned char flags);
 130 int sd_rtnl_message_addr_get_family(sd_netlink_message *m, int *family);
 131 int sd_rtnl_message_addr_get_prefixlen(sd_netlink_message *m, unsigned char *prefixlen);
 132 int sd_rtnl_message_addr_get_scope(sd_netlink_message *m, unsigned char *scope);
 133 int sd_rtnl_message_addr_get_flags(sd_netlink_message *m, unsigned char *flags);
 134 int sd_rtnl_message_addr_get_ifindex(sd_netlink_message *m, int *ifindex);
 135
 136 int sd_rtnl_message_link_set_flags(sd_netlink_message *m, unsigned flags, unsigned change);
 137 int sd_rtnl_message_link_set_type(sd_netlink_message *m, unsigned type);
 138 int sd_rtnl_message_link_set_family(sd_netlink_message *m, unsigned family);
 139 int sd_rtnl_message_link_get_ifindex(sd_netlink_message *m, int *ifindex);
 140 int sd_rtnl_message_link_get_flags(sd_netlink_message *m, unsigned *flags);
 141 int sd_rtnl_message_link_get_type(sd_netlink_message *m, unsigned short *type);
 142
 143 int sd_rtnl_message_route_set_dst_prefixlen(sd_netlink_message *m, unsigned char prefixlen);
 144 int sd_rtnl_message_route_set_src_prefixlen(sd_netlink_message *m, unsigned char prefixlen);
 145 int sd_rtnl_message_route_set_scope(sd_netlink_message *m, unsigned char scope);
 146 int sd_rtnl_message_route_set_flags(sd_netlink_message *m, unsigned flags);
 147 int sd_rtnl_message_route_set_table(sd_netlink_message *m, unsigned char table);
 148 int sd_rtnl_message_route_set_type(sd_netlink_message *m, unsigned char type);
 149 int sd_rtnl_message_route_get_flags(sd_netlink_message *m, unsigned *flags);
 150 int sd_rtnl_message_route_get_family(sd_netlink_message *m, int *family);
 151 int sd_rtnl_message_route_set_family(sd_netlink_message *m, int family);
 152 int sd_rtnl_message_route_get_protocol(sd_netlink_message *m, unsigned char *protocol);
 153 int sd_rtnl_message_route_get_scope(sd_netlink_message *m, unsigned char *scope);
 154 int sd_rtnl_message_route_get_tos(sd_netlink_message *m, unsigned char *tos);
 155 int sd_rtnl_message_route_get_table(sd_netlink_message *m, unsigned char *table);
 156 int sd_rtnl_message_route_get_dst_prefixlen(sd_netlink_message *m, unsigned char *dst_len);
 157 int sd_rtnl_message_route_get_src_prefixlen(sd_netlink_message *m, unsigned char *src_len);
 158 int sd_rtnl_message_route_get_type(sd_netlink_message *m, unsigned char *type);
 159
 160 int sd_rtnl_message_neigh_set_flags(sd_netlink_message *m, uint8_t flags);
 161 int sd_rtnl_message_neigh_set_state(sd_netlink_message *m, uint16_t state);
 162 int sd_rtnl_message_neigh_get_family(sd_netlink_message *m, int *family);
 163 int sd_rtnl_message_neigh_get_ifindex(sd_netlink_message *m, int *family);
 164 int sd_rtnl_message_neigh_get_state(sd_netlink_message *m, uint16_t *state);
 165 int sd_rtnl_message_neigh_get_flags(sd_netlink_message *m, uint8_t *flags);
 166
 167 int sd_rtnl_message_new_addrlabel(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t nlmsg_type, int ifindex, int ifal_family);
 168 int sd_rtnl_message_addrlabel_set_prefixlen(sd_netlink_message *m, unsigned char prefixlen);
 169 int sd_rtnl_message_addrlabel_get_prefixlen(sd_netlink_message *m, unsigned char *prefixlen);
 170
 171 int sd_rtnl_message_new_routing_policy_rule(sd_netlink *rtnl, sd_netlink_message **ret, uint16_t nlmsg_type, int ifal_family);
 172 int sd_rtnl_message_routing_policy_rule_set_tos(sd_netlink_message *m, unsigned char tos);
 173 int sd_rtnl_message_routing_policy_rule_get_tos(sd_netlink_message *m, unsigned char *tos);
 174 int sd_rtnl_message_routing_policy_rule_set_table(sd_netlink_message *m, unsigned char table);
 175 int sd_rtnl_message_routing_policy_rule_get_table(sd_netlink_message *m, unsigned char *table);
 176 int sd_rtnl_message_routing_policy_rule_set_rtm_src_prefixlen(sd_netlink_message *m, unsigned char len);
 177 int sd_rtnl_message_routing_policy_rule_get_rtm_src_prefixlen(sd_netlink_message *m, unsigned char *len);
 178 int sd_rtnl_message_routing_policy_rule_set_rtm_dst_prefixlen(sd_netlink_message *m, unsigned char len);
 179 int sd_rtnl_message_routing_policy_rule_get_rtm_dst_prefixlen(sd_netlink_message *m, unsigned char *len);
 180 int sd_rtnl_message_routing_policy_rule_set_rtm_type(sd_netlink_message *m, unsigned char type);
 181 int sd_rtnl_message_routing_policy_rule_get_rtm_type(sd_netlink_message *m, unsigned char *type);
 182
 183 /* genl */
 184 int sd_genl_socket_open(sd_netlink **nl);
 185 int sd_genl_message_new(sd_netlink *nl, sd_genl_family family, uint8_t cmd, sd_netlink_message **m);
 186
 187 /* slot */
 188 sd_netlink_slot *sd_netlink_slot_ref(sd_netlink_slot *nl);
 189 sd_netlink_slot *sd_netlink_slot_unref(sd_netlink_slot *nl);
 190
 191 sd_netlink *sd_netlink_slot_get_netlink(sd_netlink_slot *slot);
 192 void *sd_netlink_slot_get_userdata(sd_netlink_slot *slot);
 193 void *sd_netlink_slot_set_userdata(sd_netlink_slot *slot, void *userdata);
 194 int sd_netlink_slot_get_destroy_callback(sd_netlink_slot *slot, sd_netlink_destroy_t *callback);
 195 int sd_netlink_slot_set_destroy_callback(sd_netlink_slot *slot, sd_netlink_destroy_t callback);
 196 int sd_netlink_slot_get_floating(sd_netlink_slot *slot);
 197 int sd_netlink_slot_set_floating(sd_netlink_slot *slot, int b);
 198 int sd_netlink_slot_get_description(sd_netlink_slot *slot, const char **description);
 199 int sd_netlink_slot_set_description(sd_netlink_slot *slot, const char *description);
 200
 201
 202 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_netlink, sd_netlink_unref);
 203 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_netlink_message, sd_netlink_message_unref);
 204 _SD_DEFINE_POINTER_CLEANUP_FUNC(sd_netlink_slot, sd_netlink_slot_unref);
 205
 206 _SD_END_DECLARATIONS;
 207
 208 #endif