src/network/networkd-link-bus.c

   1 /* SPDX-License-Identifier: LGPL-2.1+ */
   2 /***
   3   This file is part of systemd.
   4
   5   Copyright 2015 Tom Gundersen
   6
   7   systemd is free software; you can redistribute it and/or modify it
   8   under the terms of the GNU Lesser General Public License as published by
   9   the Free Software Foundation; either version 2.1 of the License, or
  10   (at your option) any later version.
  11
  12   systemd is distributed in the hope that it will be useful, but
  13   WITHOUT ANY WARRANTY; without even the implied warranty of
  14   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  15   Lesser General Public License for more details.
  16
  17   You should have received a copy of the GNU Lesser General Public License
  18   along with systemd; If not, see <http://www.gnu.org/licenses/>.
  19 ***/
  20
  21 #include "alloc-util.h"
  22 #include "bus-util.h"
  23 #include "networkd-link.h"
  24 #include "networkd-manager.h"
  25 #include "parse-util.h"
  26 #include "strv.h"
  27
  28 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_operational_state, link_operstate, LinkOperationalState);
  29 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_administrative_state, link_state, LinkState);
  30
  31 const sd_bus_vtable link_vtable[] = {
  32         SD_BUS_VTABLE_START(0),
  33
  34         SD_BUS_PROPERTY("OperationalState", "s", property_get_operational_state, offsetof(Link, operstate), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  35         SD_BUS_PROPERTY("AdministrativeState", "s", property_get_administrative_state, offsetof(Link, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  36
  37         SD_BUS_VTABLE_END
  38 };
  39
  40 static char *link_bus_path(Link *link) {
  41         _cleanup_free_ char *ifindex = NULL;
  42         char *p;
  43         int r;
  44
  45         assert(link);
  46         assert(link->ifindex > 0);
  47
  48         if (asprintf(&ifindex, "%d", link->ifindex) < 0)
  49                 return NULL;
  50
  51         r = sd_bus_path_encode("/org/freedesktop/network1/link", ifindex, &p);
  52         if (r < 0)
  53                 return NULL;
  54
  55         return p;
  56 }
  57
  58 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
  59         _cleanup_strv_free_ char **l = NULL;
  60         Manager *m = userdata;
  61         unsigned c = 0;
  62         Link *link;
  63         Iterator i;
  64
  65         assert(bus);
  66         assert(path);
  67         assert(m);
  68         assert(nodes);
  69
  70         l = new0(char*, hashmap_size(m->links) + 1);
  71         if (!l)
  72                 return -ENOMEM;
  73
  74         HASHMAP_FOREACH(link, m->links, i) {
  75                 char *p;
  76
  77                 p = link_bus_path(link);
  78                 if (!p)
  79                         return -ENOMEM;
  80
  81                 l[c++] = p;
  82         }
  83
  84         l[c] = NULL;
  85         *nodes = TAKE_PTR(l);
  86
  87         return 1;
  88 }
  89
  90 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
  91         _cleanup_free_ char *identifier = NULL;
  92         Manager *m = userdata;
  93         Link *link;
  94         int ifindex, r;
  95
  96         assert(bus);
  97         assert(path);
  98         assert(interface);
  99         assert(m);
 100         assert(found);
 101
 102         r = sd_bus_path_decode(path, "/org/freedesktop/network1/link", &identifier);
 103         if (r <= 0)
 104                 return 0;
 105
 106         r = parse_ifindex(identifier, &ifindex);
 107         if (r < 0)
 108                 return 0;
 109
 110         r = link_get(m, ifindex, &link);
 111         if (r < 0)
 112                 return 0;
 113
 114         *found = link;
 115
 116         return 1;
 117 }
 118
 119 int link_send_changed(Link *link, const char *property, ...) {
 120         _cleanup_free_ char *p = NULL;
 121         char **l;
 122
 123         assert(link);
 124         assert(link->manager);
 125
 126         if (!link->manager->bus)
 127                 return 0; /* replace with assert when we have kdbus */
 128
 129         l = strv_from_stdarg_alloca(property);
 130
 131         p = link_bus_path(link);
 132         if (!p)
 133                 return -ENOMEM;
 134
 135         return sd_bus_emit_properties_changed_strv(
 136                         link->manager->bus,
 137                         p,
 138                         "org.freedesktop.network1.Link",
 139                         l);
 140 }