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 = l;
  86         l = NULL;
  87
  88         return 1;
  89 }
  90
  91 int link_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
  92         _cleanup_free_ char *identifier = NULL;
  93         Manager *m = userdata;
  94         Link *link;
  95         int ifindex, r;
  96
  97         assert(bus);
  98         assert(path);
  99         assert(interface);
 100         assert(m);
 101         assert(found);
 102
 103         r = sd_bus_path_decode(path, "/org/freedesktop/network1/link", &identifier);
 104         if (r <= 0)
 105                 return 0;
 106
 107         r = parse_ifindex(identifier, &ifindex);
 108         if (r < 0)
 109                 return 0;
 110
 111         r = link_get(m, ifindex, &link);
 112         if (r < 0)
 113                 return 0;
 114
 115         *found = link;
 116
 117         return 1;
 118 }
 119
 120 int link_send_changed(Link *link, const char *property, ...) {
 121         _cleanup_free_ char *p = NULL;
 122         char **l;
 123
 124         assert(link);
 125         assert(link->manager);
 126
 127         if (!link->manager->bus)
 128                 return 0; /* replace with assert when we have kdbus */
 129
 130         l = strv_from_stdarg_alloca(property);
 131
 132         p = link_bus_path(link);
 133         if (!p)
 134                 return -ENOMEM;
 135
 136         return sd_bus_emit_properties_changed_strv(
 137                         link->manager->bus,
 138                         p,
 139                         "org.freedesktop.network1.Link",
 140                         l);
 141 }