src/resolve/resolved-dnssd-bus.c

   1 /***
   2   Copyright © 2017 Dmitry Rozhkov
   3 ***/
   4
   5 #include "alloc-util.h"
   6 #include "bus-util.h"
   7 #include "resolved-dnssd.h"
   8 #include "resolved-dnssd-bus.h"
   9 #include "resolved-link.h"
  10 #include "strv.h"
  11 #include "user-util.h"
  12
  13 int bus_dnssd_method_unregister(sd_bus_message *message, void *userdata, sd_bus_error *error) {
  14         DnssdService *s = userdata;
  15         DnssdTxtData *txt_data;
  16         Manager *m;
  17         Iterator i;
  18         Link *l;
  19         int r;
  20
  21         assert(message);
  22         assert(s);
  23
  24         m = s->manager;
  25
  26         r = bus_verify_polkit_async(message, CAP_SYS_ADMIN,
  27                                     "org.freedesktop.resolve1.unregister-service",
  28                                     NULL, false, s->originator,
  29                                     &m->polkit_registry, error);
  30         if (r < 0)
  31                 return r;
  32         if (r == 0)
  33                 return 1; /* Polkit will call us back */
  34
  35         HASHMAP_FOREACH(l, m->links, i) {
  36                 if (l->mdns_ipv4_scope) {
  37                         r = dns_scope_announce(l->mdns_ipv4_scope, true);
  38                         if (r < 0)
  39                                 log_warning_errno(r, "Failed to send goodbye messages in IPv4 scope: %m");
  40
  41                         dns_zone_remove_rr(&l->mdns_ipv4_scope->zone, s->ptr_rr);
  42                         dns_zone_remove_rr(&l->mdns_ipv4_scope->zone, s->srv_rr);
  43                         LIST_FOREACH(items, txt_data, s->txt_data_items)
  44                                 dns_zone_remove_rr(&l->mdns_ipv4_scope->zone, txt_data->rr);
  45                 }
  46
  47                 if (l->mdns_ipv6_scope) {
  48                         r = dns_scope_announce(l->mdns_ipv6_scope, true);
  49                         if (r < 0)
  50                                 log_warning_errno(r, "Failed to send goodbye messages in IPv6 scope: %m");
  51
  52                         dns_zone_remove_rr(&l->mdns_ipv6_scope->zone, s->ptr_rr);
  53                         dns_zone_remove_rr(&l->mdns_ipv6_scope->zone, s->srv_rr);
  54                         LIST_FOREACH(items, txt_data, s->txt_data_items)
  55                                 dns_zone_remove_rr(&l->mdns_ipv6_scope->zone, txt_data->rr);
  56                 }
  57         }
  58
  59         dnssd_service_free(s);
  60
  61         manager_refresh_rrs(m);
  62
  63         return sd_bus_reply_method_return(message, NULL);
  64 }
  65
  66 const sd_bus_vtable dnssd_vtable[] = {
  67         SD_BUS_VTABLE_START(0),
  68
  69         SD_BUS_METHOD("Unregister", NULL, NULL, bus_dnssd_method_unregister, SD_BUS_VTABLE_UNPRIVILEGED),
  70         SD_BUS_SIGNAL("Conflicted", NULL, 0),
  71
  72         SD_BUS_VTABLE_END
  73 };
  74
  75 int dnssd_object_find(sd_bus *bus, const char *path, const char *interface, void *userdata, void **found, sd_bus_error *error) {
  76         _cleanup_free_ char *name = NULL;
  77         Manager *m = userdata;
  78         DnssdService *service;
  79         int r;
  80
  81         assert(bus);
  82         assert(path);
  83         assert(interface);
  84         assert(found);
  85         assert(m);
  86
  87         r = sd_bus_path_decode(path, "/org/freedesktop/resolve1/dnssd", &name);
  88         if (r <= 0)
  89                 return 0;
  90
  91         service = hashmap_get(m->dnssd_services, name);
  92         if (!service)
  93                 return 0;
  94
  95         *found = service;
  96         return 1;
  97 }
  98
  99 int dnssd_node_enumerator(sd_bus *bus, const char *path, void *userdata, char ***nodes, sd_bus_error *error) {
 100         _cleanup_strv_free_ char **l = NULL;
 101         Manager *m = userdata;
 102         DnssdService *service;
 103         Iterator i;
 104         unsigned c = 0;
 105         int r;
 106
 107         assert(bus);
 108         assert(path);
 109         assert(m);
 110         assert(nodes);
 111
 112         l = new0(char*, hashmap_size(m->dnssd_services) + 1);
 113         if (!l)
 114                 return -ENOMEM;
 115
 116         HASHMAP_FOREACH(service, m->dnssd_services, i) {
 117                 char *p;
 118
 119                 r = sd_bus_path_encode("/org/freedesktop/resolve1/dnssd", service->name, &p);
 120                 if (r < 0)
 121                         return r;
 122
 123                 l[c++] = p;
 124         }
 125
 126         l[c] = NULL;
 127         *nodes = TAKE_PTR(l);
 128
 129         return 1;
 130 }