Add network interface device list and selection.

omvs_main.c

@@ -3,17 +3,24 @@
 #include <gio/gio.h>
 #include <gst/gst.h>
 
-static gchar *_omvs_net_dev;
+static gint _omvs_net_dev_idx;
+static gboolean _omvs_list_devs;
 static gchar *_omvs_output = "omvs_out.txt";
 static gint _omvs_jobs = 1;
 static gint _omvs_sleep = 1000;
 static gint _omvs_timeout = 10000;
 static gboolean _omvs_verbose;
 
+static gchar **_omvs_net_dev_names;
+static gchar **_omvs_net_dev_descs;
+static gint _omvs_num_net_devs;
+
 static GOptionEntry _omvs_entries[] =
 {
-  { "interface", 'i', 0, G_OPTION_ARG_STRING, &_omvs_net_dev,
+  { "interface", 'i', 0, G_OPTION_ARG_INT, &_omvs_net_dev_idx,
-    "Network device interface", "dev" },
+    "Network device interface index", "dev_idx" },
+  { "list-inteface", 'l', 0, G_OPTION_ARG_NONE, &_omvs_list_devs,
+    "List network device interfaces", NULL },
   { "jobs", 'j', 0, G_OPTION_ARG_INT, &_omvs_jobs,
     "Number of jobs", "jobs" },
   { "output", 'o', 0, G_OPTION_ARG_FILENAME, &_omvs_output,
@@ -43,9 +50,63 @@ typedef struct _OMVSScanner {
   gint num_ipaddrs;
 } OMVSScanner;
 
+static gint _omvs_init_net_devs_info(void);
+static gint _omvs_print_net_devs_info(void);
+static gint _omvs_deinit_net_devs_info(void);
 static gint _omvs_start_scan(OMVSScanner *scanner);
 static gpointer _omvs_start_scan_job(gpointer data);
 
+static gint _omvs_init_net_devs_info(void) {
+  gchar errbuf[PCAP_ERRBUF_SIZE];
+  pcap_if_t *alldevs;
+  pcap_if_t *dev;
+  gint i;
+
+  if (pcap_findalldevs(&alldevs, errbuf) != 0) {
+    g_print("pcap_findalldevs() fail: %s", errbuf);
+    return -1;
+  }
+  dev = alldevs;
+  while (dev) {
+    _omvs_num_net_devs++;
+    dev = dev->next;
+  }
+  _omvs_net_dev_names = g_malloc(sizeof(gchar *) * _omvs_num_net_devs);
+  _omvs_net_dev_descs = g_malloc(sizeof(gchar *) * _omvs_num_net_devs);
+
+  for (i = 0, dev = alldevs; dev; i++, dev = dev->next) {
+    _omvs_net_dev_names[i] = g_strdup(dev->name);
+    _omvs_net_dev_descs[i] = g_strdup(dev->description);
+  }
+  pcap_freealldevs(alldevs);
+
+  return 0;
+}
+
+static gint _omvs_print_net_devs_info(void) {
+  gint i;
+
+  for (i = 0; i < _omvs_num_net_devs; i++) {
+    g_print("dev_idx(%d) dev_name(%s) dev_desc(%s)\n",
+      i, _omvs_net_dev_names[i], _omvs_net_dev_descs[i]);
+  }
+
+  return 0;
+}
+
+static gint _omvs_deinit_net_devs_info(void) {
+  gint i;
+
+  for (i = 0; i < _omvs_num_net_devs; i++) {
+    g_free(_omvs_net_dev_names[i]);
+    g_free(_omvs_net_dev_descs[i]);
+  }
+  g_free(_omvs_net_dev_names);
+  g_free(_omvs_net_dev_descs);
+
+  return 0;
+}
+
 static gpointer _omvs_start_scan_job(gpointer data) {
   OMVSScanner *scanner;
   GError *error;
@@ -90,8 +151,8 @@ static gpointer _omvs_start_scan_job(gpointer data) {
       g_print("[%p] start scanning %s\n", (void *)g_thread_self(), addr_str);
     }
     group_address = g_inet_address_new_from_string(addr_str);
-    if (!g_socket_join_multicast_group(
+    if (!g_socket_join_multicast_group(socket, group_address, FALSE,
-      socket, group_address, FALSE, _omvs_net_dev, &error)) {
+      _omvs_net_dev_names[_omvs_net_dev_idx], &error)) {
       g_printerr("[%p] can't join %s: %s\n", (void *)g_thread_self(),
         addr_str, error->message);
     }
@@ -101,8 +162,8 @@ static gpointer _omvs_start_scan_job(gpointer data) {
     if (_omvs_verbose) {
       g_print("[%p] finish scanning %s\n", (void *)g_thread_self(), addr_str);
     }
-    if (!g_socket_leave_multicast_group(
+    if (!g_socket_leave_multicast_group(socket, group_address, FALSE,
-      socket, group_address, FALSE, _omvs_net_dev, &error)) {
+      _omvs_net_dev_names[_omvs_net_dev_idx], &error)) {
       g_printerr("[%p] can't leave %s: %s\n", (void *)g_thread_self(),
         addr_str, error->message);
     }
@@ -163,6 +224,11 @@ int main(int argc, char *argv[]) {
   gint idx_ipaddr;
   OMVSScanner omvs_scanner;
 
+  if (_omvs_init_net_devs_info() != 0) {
+    ret = -5;
+    goto finish_return2;
+  }
+
   context = g_option_context_new("<multicast ip address or net ... [#N]>");
   g_option_context_set_summary(context,
     "omvs scans to find free video streaming multicast ip addresses."
@@ -180,6 +246,12 @@ int main(int argc, char *argv[]) {
     goto finish_return;
   }
 
+  if (_omvs_list_devs) {
+    _omvs_print_net_devs_info();
+    ret = 0;
+    goto finish_return;
+  }
+
   if (argc < 2) {
     gchar *help_msg;
     help_msg = g_option_context_get_help(context, TRUE, NULL);
@@ -263,6 +335,8 @@ int main(int argc, char *argv[]) {
 
 finish_return:
   g_option_context_free(context);
+  _omvs_deinit_net_devs_info();
+finish_return2:
 
   return ret;
 }