git.meshlink.io Git - catta/blob - avahi-discover/main.c

   1 #include <string.h>
   2
   3 #include <gtk/gtk.h>
   4 #include <glade/glade.h>
   5 #include <avahi-core/core.h>
   6 #include <avahi-core/strlst.h>
   7
   8 struct ServiceType;
   9
  10 struct Service {
  11     struct ServiceType *service_type;
  12     gchar *service_name;
  13     gchar *domain_name;
  14
  15     gint interface;
  16     guchar protocol;
  17
  18     GtkTreeRowReference *tree_ref;
  19 };
  20
  21 struct ServiceType {
  22     gchar *service_type;
  23     AvahiServiceBrowser *browser;
  24
  25     GList *services;
  26     GtkTreeRowReference *tree_ref;
  27 };
  28
  29 static GtkWidget *main_window = NULL;
  30 static GtkTreeView *tree_view = NULL;
  31 static GtkTreeStore *tree_store = NULL;
  32 static GtkLabel *info_label = NULL;
  33 static AvahiServer *server = NULL;
  34 static AvahiServiceTypeBrowser *service_type_browser = NULL;
  35 static GHashTable *service_type_hash_table = NULL;
  36 static AvahiServiceResolver *service_resolver = NULL;
  37 static struct Service *current_service = NULL;
  38
  39 /* very, very ugly: just import these two internal but useful functions from libavahi-core by hand */
  40 guint avahi_domain_hash(const gchar *s);
  41 gboolean avahi_domain_equal(const gchar *a, const gchar *b);
  42
  43 static struct Service *get_service(const gchar *service_type, const gchar *service_name, const gchar*domain_name, gint interface, guchar protocol) {
  44     struct ServiceType *st;
  45     GList *l;
  46
  47     if (!(st = g_hash_table_lookup(service_type_hash_table, service_type)))
  48         return NULL;
  49
  50     for (l = st->services; l; l = l->next) {
  51         struct Service *s = l->data;
  52
  53         if (s->interface == interface &&
  54             s->protocol == protocol &&
  55             avahi_domain_equal(s->service_name, service_name) &&
  56             avahi_domain_equal(s->domain_name, domain_name))
  57             return s;
  58     }
  59
  60     return NULL;
  61 }
  62
  63 static void free_service(struct Service *s) {
  64     GtkTreeIter iter;
  65     GtkTreePath *path;
  66
  67     if (current_service == s) {
  68         current_service = NULL;
  69
  70         if (service_resolver) {
  71             avahi_service_resolver_free(service_resolver);
  72             service_resolver = NULL;
  73         }
  74
  75         gtk_label_set_text(info_label, "<i>Service removed</i>");
  76     }
  77
  78     s->service_type->services = g_list_remove(s->service_type->services, s);
  79
  80     path = gtk_tree_row_reference_get_path(s->tree_ref);
  81     gtk_tree_model_get_iter(GTK_TREE_MODEL(tree_store), &iter, path);
  82     gtk_tree_path_free(path);
  83
  84     gtk_tree_store_remove(tree_store, &iter);
  85
  86     gtk_tree_row_reference_free(s->tree_ref);
  87
  88     g_free(s->service_name);
  89     g_free(s->domain_name);
  90     g_free(s);
  91 }
  92
  93 static void service_browser_callback(AvahiServiceBrowser *b, gint interface, guchar protocol, AvahiBrowserEvent event, const gchar *service_name, const gchar *service_type, const gchar *domain_name, gpointer userdata) {
  94
  95     if (event == AVAHI_BROWSER_NEW) {
  96         struct Service *s;
  97         GtkTreeIter iter, piter;
  98         GtkTreePath *path, *ppath;
  99         gchar iface[256];
 100
 101         s = g_new(struct Service, 1);
 102         s->service_name = g_strdup(service_name);
 103         s->domain_name = g_strdup(domain_name);
 104         s->interface = interface;
 105         s->protocol = protocol;
 106         s->service_type = g_hash_table_lookup(service_type_hash_table, service_type);
 107         g_assert(s->service_type);
 108
 109
 110
 111         s->service_type->services = g_list_prepend(s->service_type->services, s);
 112
 113         ppath = gtk_tree_row_reference_get_path(s->service_type->tree_ref);
 114         gtk_tree_model_get_iter(GTK_TREE_MODEL(tree_store), &piter, ppath);
 115
 116         snprintf(iface, sizeof(iface), "#%i %s", interface, protocol == AF_INET ? "IPv4" : "IPv6");
 117
 118         gtk_tree_store_append(tree_store, &iter, &piter);
 119         gtk_tree_store_set(tree_store, &iter, 0, s->service_name, 1, iface, 2, s, -1);
 120
 121         path = gtk_tree_model_get_path(GTK_TREE_MODEL(tree_store), &iter);
 122         s->tree_ref = gtk_tree_row_reference_new(GTK_TREE_MODEL(tree_store), path);
 123         gtk_tree_path_free(path);
 124
 125         gtk_tree_view_expand_row(tree_view, ppath, FALSE);
 126         gtk_tree_path_free(ppath);
 127
 128
 129     } else if (event == AVAHI_BROWSER_REMOVE) {
 130         struct Service* s;
 131
 132         if ((s = get_service(service_type, service_name, domain_name, interface, protocol)))
 133             free_service(s);
 134     }
 135 }
 136
 137 static void service_type_browser_callback(AvahiServiceTypeBrowser *b, gint interface, guchar protocol, AvahiBrowserEvent event, const gchar *service_type, const gchar *domain, gpointer userdata) {
 138     struct ServiceType *st;
 139     GtkTreePath *path;
 140     GtkTreeIter iter;
 141
 142     if (event != AVAHI_BROWSER_NEW)
 143         return;
 144
 145     if (g_hash_table_lookup(service_type_hash_table, service_type))
 146         return;
 147
 148     st = g_new(struct ServiceType, 1);
 149     st->service_type = g_strdup(service_type);
 150     st->services = NULL;
 151
 152     gtk_tree_store_append(tree_store, &iter, NULL);
 153     gtk_tree_store_set(tree_store, &iter, 0, st->service_type, 1, "", 2, NULL, -1);
 154
 155     path = gtk_tree_model_get_path(GTK_TREE_MODEL(tree_store), &iter);
 156     st->tree_ref = gtk_tree_row_reference_new(GTK_TREE_MODEL(tree_store), path);
 157     gtk_tree_path_free(path);
 158
 159     g_hash_table_insert(service_type_hash_table, st->service_type, st);
 160
 161     st->browser = avahi_service_browser_new(server, -1, AF_UNSPEC, st->service_type, domain, service_browser_callback, NULL);
 162 }
 163
 164 static void update_label(struct Service *s, const gchar *hostname, const AvahiAddress *a, guint16 port, AvahiStringList *txt) {
 165     gchar t[512], address[64], *txt_s;
 166
 167     if (a && hostname) {
 168         char na[256];
 169         avahi_address_snprint(na, sizeof(na), a);
 170         snprintf(address, sizeof(address), "%s/%s:%u", hostname, na, port);
 171         txt_s = avahi_string_list_to_string(txt);
 172     } else {
 173         snprintf(address, sizeof(address), "<i>n/a</i>");
 174         txt_s = g_strdup("<i>n/a</i>");
 175     }
 176
 177     snprintf(t, sizeof(t),
 178              "<b>Service Type:</b> %s\n"
 179              "<b>Service Name:</b> %s\n"
 180              "<b>Domain Name:</b> %s\n"
 181              "<b>Interface:</b> %i %s\n"
 182              "<b>Address:</b> %s\n"
 183              "<b>TXT Data:</b> %s",
 184              s->service_type->service_type,
 185              s->service_name,
 186              s->domain_name,
 187              s->interface,
 188              s->protocol == AF_INET ? "IPv4" : "IPv6",
 189              address,
 190              txt_s);
 191
 192     gtk_label_set_markup(info_label, t);
 193
 194     g_free(txt_s);
 195 }
 196
 197 static struct Service *get_service_on_cursor(void) {
 198     GtkTreePath *path;
 199     struct Service *s;
 200     GtkTreeIter iter;
 201
 202     gtk_tree_view_get_cursor(tree_view, &path, NULL);
 203     gtk_tree_model_get_iter(GTK_TREE_MODEL(tree_store), &iter, path);
 204     gtk_tree_model_get(GTK_TREE_MODEL(tree_store), &iter, 2, &s, -1);
 205     gtk_tree_path_free(path);
 206
 207     return s;
 208 }
 209
 210
 211 static void service_resolver_callback(AvahiServiceResolver *r, gint interface, guchar protocol, AvahiResolverEvent event, const gchar *name, const gchar *type, const gchar *domain, const gchar *host_name, const AvahiAddress *a, guint16 port, AvahiStringList *txt, gpointer userdata) {
 212     struct Service *s;
 213     g_assert(r);
 214
 215     if (!(s = get_service_on_cursor()) || userdata != s) {
 216         g_assert(r == service_resolver);
 217         avahi_service_resolver_free(service_resolver);
 218         service_resolver = NULL;
 219     }
 220
 221     if (event == AVAHI_RESOLVER_TIMEOUT)
 222         gtk_label_set_text(info_label, "<i>Failed to resolve.</i>");
 223     else
 224         update_label(s, host_name, a, port, txt);
 225 }
 226
 227 static void tree_view_on_cursor_changed(GtkTreeView *tv, gpointer userdata) {
 228     struct Service *s;
 229
 230     if (!(s = get_service_on_cursor()))
 231         return;
 232
 233     if (service_resolver)
 234         avahi_service_resolver_free(service_resolver);
 235
 236     update_label(s, NULL, NULL, 0, NULL);
 237
 238     service_resolver = avahi_service_resolver_new(server, s->interface, s->protocol, s->service_name, s->service_type->service_type, s->domain_name, AF_UNSPEC, service_resolver_callback, s);
 239 }
 240
 241 gboolean main_window_on_delete_event(GtkWidget *widget, GdkEvent *event, gpointer user_data) {
 242     gtk_main_quit();
 243     return FALSE;
 244 }
 245
 246 int main(int argc, char *argv[]) {
 247     GladeXML *xml;
 248     AvahiServerConfig config;
 249
 250     gtk_init(&argc, &argv);
 251     glade_init();
 252
 253     xml = glade_xml_new("avahi-discover.glade", NULL, NULL);
 254     main_window = glade_xml_get_widget(xml, "main_window");
 255     g_signal_connect(main_window, "delete-event", (GCallback) main_window_on_delete_event, NULL);
 256
 257     tree_view = GTK_TREE_VIEW(glade_xml_get_widget(xml, "tree_view"));
 258     g_signal_connect(GTK_WIDGET(tree_view), "cursor-changed", (GCallback) tree_view_on_cursor_changed, NULL);
 259
 260     info_label = GTK_LABEL(glade_xml_get_widget(xml, "info_label"));
 261
 262     tree_store = gtk_tree_store_new(3, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_POINTER);
 263     gtk_tree_view_set_model(tree_view, GTK_TREE_MODEL(tree_store));
 264     gtk_tree_view_insert_column_with_attributes(tree_view, -1, "Name", gtk_cell_renderer_text_new(), "text", 0, NULL);
 265     gtk_tree_view_insert_column_with_attributes(tree_view, -1, "Interface", gtk_cell_renderer_text_new(), "text", 1, NULL);
 266
 267     service_type_hash_table = g_hash_table_new((GHashFunc) avahi_domain_hash, (GEqualFunc) avahi_domain_equal);
 268
 269     avahi_server_config_init(&config);
 270     config.register_hinfo = config.register_addresses = config.announce_domain = FALSE;
 271     server = avahi_server_new(NULL, &config, NULL, NULL);
 272     avahi_server_config_free(&config);
 273
 274     service_type_browser = avahi_service_type_browser_new(server, -1, AF_UNSPEC, argc >= 2 ? argv[1] : NULL, service_type_browser_callback, NULL);
 275
 276     gtk_main();
 277
 278     avahi_server_free(server);
 279
 280     return 0;
 281 }