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-common/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         s->service_type->services = g_list_prepend(s->service_type->services, s);
 110
 111         ppath = gtk_tree_row_reference_get_path(s->service_type->tree_ref);
 112         gtk_tree_model_get_iter(GTK_TREE_MODEL(tree_store), &piter, ppath);
 113
 114         snprintf(iface, sizeof(iface), "#%i %s", interface, protocol == AF_INET ? "IPv4" : "IPv6");
 115
 116         gtk_tree_store_append(tree_store, &iter, &piter);
 117         gtk_tree_store_set(tree_store, &iter, 0, s->service_name, 1, iface, 2, s, -1);
 118
 119         path = gtk_tree_model_get_path(GTK_TREE_MODEL(tree_store), &iter);
 120         s->tree_ref = gtk_tree_row_reference_new(GTK_TREE_MODEL(tree_store), path);
 121         gtk_tree_path_free(path);
 122
 123         gtk_tree_view_expand_row(tree_view, ppath, FALSE);
 124         gtk_tree_path_free(ppath);
 125
 126
 127     } else if (event == AVAHI_BROWSER_REMOVE) {
 128         struct Service* s;
 129
 130         if ((s = get_service(service_type, service_name, domain_name, interface, protocol)))
 131             free_service(s);
 132     }
 133 }
 134
 135 static void service_type_browser_callback(AvahiServiceTypeBrowser *b, gint interface, guchar protocol, AvahiBrowserEvent event, const gchar *service_type, const gchar *domain, gpointer userdata) {
 136     struct ServiceType *st;
 137     GtkTreePath *path;
 138     GtkTreeIter iter;
 139
 140     if (event != AVAHI_BROWSER_NEW)
 141         return;
 142
 143     if (g_hash_table_lookup(service_type_hash_table, service_type))
 144         return;
 145
 146     st = g_new(struct ServiceType, 1);
 147     st->service_type = g_strdup(service_type);
 148     st->services = NULL;
 149
 150     gtk_tree_store_append(tree_store, &iter, NULL);
 151     gtk_tree_store_set(tree_store, &iter, 0, st->service_type, 1, "", 2, NULL, -1);
 152
 153     path = gtk_tree_model_get_path(GTK_TREE_MODEL(tree_store), &iter);
 154     st->tree_ref = gtk_tree_row_reference_new(GTK_TREE_MODEL(tree_store), path);
 155     gtk_tree_path_free(path);
 156
 157     g_hash_table_insert(service_type_hash_table, st->service_type, st);
 158
 159     st->browser = avahi_service_browser_new(server, -1, AF_UNSPEC, st->service_type, domain, service_browser_callback, NULL);
 160 }
 161
 162 static void update_label(struct Service *s, const gchar *hostname, const AvahiAddress *a, guint16 port, AvahiStringList *txt) {
 163     gchar t[512], address[64], *txt_s;
 164
 165     if (a && hostname) {
 166         char na[256];
 167         avahi_address_snprint(na, sizeof(na), a);
 168         snprintf(address, sizeof(address), "%s/%s:%u", hostname, na, port);
 169         txt_s = avahi_string_list_to_string(txt);
 170     } else {
 171         snprintf(address, sizeof(address), "<i>n/a</i>");
 172         txt_s = g_strdup("<i>n/a</i>");
 173     }
 174
 175     snprintf(t, sizeof(t),
 176              "<b>Service Type:</b> %s\n"
 177              "<b>Service Name:</b> %s\n"
 178              "<b>Domain Name:</b> %s\n"
 179              "<b>Interface:</b> %i %s\n"
 180              "<b>Address:</b> %s\n"
 181              "<b>TXT Data:</b> %s",
 182              s->service_type->service_type,
 183              s->service_name,
 184              s->domain_name,
 185              s->interface,
 186              s->protocol == AF_INET ? "IPv4" : "IPv6",
 187              address,
 188              txt_s);
 189
 190     gtk_label_set_markup(info_label, t);
 191
 192     g_free(txt_s);
 193 }
 194
 195 static struct Service *get_service_on_cursor(void) {
 196     GtkTreePath *path;
 197     struct Service *s;
 198     GtkTreeIter iter;
 199
 200     gtk_tree_view_get_cursor(tree_view, &path, NULL);
 201     gtk_tree_model_get_iter(GTK_TREE_MODEL(tree_store), &iter, path);
 202     gtk_tree_model_get(GTK_TREE_MODEL(tree_store), &iter, 2, &s, -1);
 203     gtk_tree_path_free(path);
 204
 205     return s;
 206 }
 207
 208
 209 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) {
 210     struct Service *s;
 211     g_assert(r);
 212
 213     if (!(s = get_service_on_cursor()) || userdata != s) {
 214         g_assert(r == service_resolver);
 215         avahi_service_resolver_free(service_resolver);
 216         service_resolver = NULL;
 217     }
 218
 219     if (event == AVAHI_RESOLVER_TIMEOUT)
 220         gtk_label_set_markup(info_label, "<i>Failed to resolve.</i>");
 221     else
 222         update_label(s, host_name, a, port, txt);
 223 }
 224
 225 static void tree_view_on_cursor_changed(GtkTreeView *tv, gpointer userdata) {
 226     struct Service *s;
 227
 228     if (!(s = get_service_on_cursor()))
 229         return;
 230
 231     if (service_resolver)
 232         avahi_service_resolver_free(service_resolver);
 233
 234     update_label(s, NULL, NULL, 0, NULL);
 235
 236     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);
 237 }
 238
 239 gboolean main_window_on_delete_event(GtkWidget *widget, GdkEvent *event, gpointer user_data) {
 240     gtk_main_quit();
 241     return FALSE;
 242 }
 243
 244 int main(int argc, char *argv[]) {
 245     GladeXML *xml;
 246     AvahiServerConfig config;
 247     GtkTreeViewColumn *c;
 248
 249     gtk_init(&argc, &argv);
 250     glade_init();
 251
 252     xml = glade_xml_new("avahi-discover.glade", NULL, NULL);
 253     main_window = glade_xml_get_widget(xml, "main_window");
 254     g_signal_connect(main_window, "delete-event", (GCallback) main_window_on_delete_event, NULL);
 255
 256     tree_view = GTK_TREE_VIEW(glade_xml_get_widget(xml, "tree_view"));
 257     g_signal_connect(GTK_WIDGET(tree_view), "cursor-changed", (GCallback) tree_view_on_cursor_changed, NULL);
 258
 259     info_label = GTK_LABEL(glade_xml_get_widget(xml, "info_label"));
 260
 261     tree_store = gtk_tree_store_new(3, G_TYPE_STRING, G_TYPE_STRING, G_TYPE_POINTER);
 262     gtk_tree_view_set_model(tree_view, GTK_TREE_MODEL(tree_store));
 263     gtk_tree_view_insert_column_with_attributes(tree_view, -1, "Name", gtk_cell_renderer_text_new(), "text", 0, NULL);
 264     gtk_tree_view_insert_column_with_attributes(tree_view, -1, "Interface", gtk_cell_renderer_text_new(), "text", 1, NULL);
 265
 266     gtk_tree_view_column_set_resizable(c = gtk_tree_view_get_column(tree_view, 0), TRUE);
 267     gtk_tree_view_column_set_sizing(c, GTK_TREE_VIEW_COLUMN_GROW_ONLY);
 268     gtk_tree_view_column_set_expand(c, TRUE);
 269
 270     service_type_hash_table = g_hash_table_new((GHashFunc) avahi_domain_hash, (GEqualFunc) avahi_domain_equal);
 271
 272     avahi_server_config_init(&config);
 273     config.publish_hinfo = config.publish_addresses = config.publish_domain = config.publish_workstation = FALSE;
 274     server = avahi_server_new(NULL, &config, NULL, NULL);
 275     avahi_server_config_free(&config);
 276
 277     service_type_browser = avahi_service_type_browser_new(server, -1, AF_UNSPEC, argc >= 2 ? argv[1] : NULL, service_type_browser_callback, NULL);
 278
 279     gtk_main();
 280
 281     avahi_server_free(server);
 282
 283     return 0;
 284 }