disorder-speaker now logs what it's transmitting too, and only

[disorder] / lib / ifreq.c

diff --git a/lib/ifreq.c b/lib/ifreq.c
new file mode 100644 (file)
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+++ b/lib/ifreq.c
@@ -0,0 +1,84 @@
+/*
+ * This file is part of DisOrder.
+ * Copyright (C) 2007 Richard Kettlewell
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+ * USA
+ */
+/** @file lib/ffreq.c
+ * @brief Network interface support
+ */
+
+#include <config.h>
+#include "types.h"
+
+#include <sys/ioctl.h>
+#include <net/if.h>
+#include <netinet/in.h>
+#include <errno.h>
+#include <string.h>
+
+#include "ifreq.h"
+#include "mem.h"
+#include "log.h"
+
+/** @brief Get the list of network interfaces
+ * @param fd File descriptor to use
+ * @param interfaces Where to put pointer to array of interfaces
+ * @param ninterfaces Where to put count of interfaces
+ */
+void ifreq_list(int fd, struct ifreq **interfaces, int *ninterfaces) {
+  struct ifconf ifc;
+  int l;
+
+  ifc.ifc_len = 0;
+  ifc.ifc_req = 0;
+  do {
+    l = ifc.ifc_len = ifc.ifc_len ? 2 * ifc.ifc_len
+                                  : 16 * (int)sizeof (struct ifreq);
+    if(!l) fatal(0, "out of memory");
+    ifc.ifc_req = xrealloc(ifc.ifc_req, l);
+    if(ioctl(fd, SIOCGIFCONF, &ifc) < 0)
+      fatal(errno, "error calling ioctl SIOCGIFCONF");
+  } while(l == ifc.ifc_len);
+  *ninterfaces = ifc.ifc_len / sizeof (struct ifreq);
+  *interfaces = ifc.ifc_req;
+}
+
+/** @brief Return true if two socket addresses match */
+int sockaddr_equal(const struct sockaddr *a, const struct sockaddr *b) {
+  if(a->sa_family != b->sa_family)
+    return 0;
+  switch(a->sa_family) {
+  case AF_INET:
+    return ((const struct sockaddr_in *)a)->sin_addr.s_addr
+           == ((const struct sockaddr_in *)b)->sin_addr.s_addr;
+  case AF_INET6:
+    return !memcmp(&((const struct sockaddr_in6 *)a)->sin6_addr,
+                  &((const struct sockaddr_in6 *)b)->sin6_addr,
+                  sizeof (struct in6_addr));
+  default:
+    fatal(0, "unknown address family %d", a->sa_family);
+  }
+}
+
+/*
+Local Variables:
+c-basic-offset:2
+comment-column:40
+fill-column:79
+indent-tabs-mode:nil
+End:
+*/