src/network/networkd-link-bus.c

   1 /***
   2   This file is part of systemd.
   3
   4   Copyright 2015 Tom Gundersen
   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 "alloc-util.h"
  21 #include "bus-util.h"
  22 #include "networkd-link.h"
  23 #include "networkd-manager.h"
  24 #include "parse-util.h"
  25 #include "strv.h"
  26
  27 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_operational_state, link_operstate, LinkOperationalState);
  28 static BUS_DEFINE_PROPERTY_GET_ENUM(property_get_administrative_state, link_state, LinkState);
  29
  30 const sd_bus_vtable link_vtable[] = {
  31         SD_BUS_VTABLE_START(0),
  32
  33         SD_BUS_PROPERTY("OperationalState", "s", property_get_operational_state, offsetof(Link, operstate), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  34         SD_BUS_PROPERTY("AdministrativeState", "s", property_get_administrative_state, offsetof(Link, state), SD_BUS_VTABLE_PROPERTY_EMITS_CHANGE),
  35
  36         SD_BUS_VTABLE_END
  37 };
  38
  39 static char *link_bus_path(Link *link) {
  40         _cleanup_free_ char *ifindex = NULL;
  41         char *p;
  42         int r;
  43
  44         assert(link);
  45         assert(link->ifindex > 0);
  46
  47         if (asprintf(&ifindex, "%d", link->ifindex) < 0)
  48                 return NULL;
  49
  50         r = sd_bus_path_encode("/org/freedesktop/network1/link", ifindex, &p);
  51         if (r < 0)
  52                 return NULL;
  53
  54         return p;
  55 }
  56
  57 int link_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
  58         _cleanup_strv_free_ char **l = NULL;
  59         Manager *m = userdata;
  60         unsigned c = 0;
  61         Link *link;
  62         Iterator i;
  63
  64         assert(bus);
  65         assert(path);
  66         assert(m);
  67         assert(nodes);
  68
  69         l = new0(char*, hashmap_size(m->links) + 1);
  70         if (!l)
  71                 return -ENOMEM;
  72
  73         HASHMAP_FOREACH(link, m->links, i) {
  74                 char *p;
  75
  76                 p = link_bus_path(link);
  77                 if (!p)
  78                         return -ENOMEM;
  79
  80                 l[c++] = p;
  81         }
  82
  83         l[c] = NULL;
  84         *nodes = l;
  85         l = NULL;
  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 }