1 files changed, 261 insertions, 0 deletions
diff --git a/krfb/srvloc/getifaddrs.cpp b/krfb/srvloc/getifaddrs.cpp
new file mode 100644
index 00000000..cff9e81e
--- /dev/null
+++ b/krfb/srvloc/getifaddrs.cpp
@@ -0,0 +1,261 @@
+/* getifaddrs -- get names and addresses of all network interfaces
+   Copyright (C) 1999,2002 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+/**
+ * 02-12-26, [email protected]: put in kde_ namespace, C++ fixes,
+ *                           included ifreq.h
+ *                           removed glibc dependencies
+ */
+
+#include "config.h"
+
+#ifndef HAVE_GETIFADDRS
+
+#include "getifaddrs.h"
+#include <net/if.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <netinet/in.h>
+#include <stdio.h>
+
+#ifndef IF_NAMESIZE
+#define IF_NAMESIZE IFNAMSIZ
+#endif
+
+#ifdef SIOCGIFCONF
+
+#define old_siocgifconf 0
+
+static inline void
+__ifreq (struct ifreq **ifreqs, int *num_ifs, int sockfd)
+{
+  int fd = sockfd;
+  struct ifconf ifc;
+  int rq_len;
+  int nifs;
+# define RQ_IFS	4
+
+  if (fd < 0)
+    fd = socket (AF_INET, SOCK_DGRAM, 0);
+  if (fd < 0)
+    {
+      *num_ifs = 0;
+      *ifreqs = NULL;
+      return;
+    }
+
+  ifc.ifc_buf = NULL;
+
+  /* We may be able to get the needed buffer size directly, rather than
+     guessing.  */
+  if (! old_siocgifconf)
+    {
+      ifc.ifc_buf = NULL;
+      ifc.ifc_len = 0;
+      if (ioctl (fd, SIOCGIFCONF, &ifc) < 0 || ifc.ifc_len == 0)
+	{
+	  rq_len = RQ_IFS * sizeof (struct ifreq);
+	}
+      else
+	rq_len = ifc.ifc_len;
+    }
+  else
+    rq_len = RQ_IFS * sizeof (struct ifreq);
+
+  /* Read all the interfaces out of the kernel.  */
+  while (1)
+    {
+      ifc.ifc_len = rq_len;
+      ifc.ifc_buf = (char*) realloc (ifc.ifc_buf, ifc.ifc_len);
+      if (ifc.ifc_buf == NULL || ioctl (fd, SIOCGIFCONF, &ifc) < 0)
+	{
+	  if (ifc.ifc_buf)
+	    free (ifc.ifc_buf);
+
+	  if (fd != sockfd)
+	    close (fd);
+
+	  *num_ifs = 0;
+	  *ifreqs = NULL;
+	  return;
+	}
+
+      if (!old_siocgifconf || ifc.ifc_len < rq_len)
+	break;
+
+      rq_len *= 2;
+    }
+
+  nifs = ifc.ifc_len / sizeof (struct ifreq);
+
+  if (fd != sockfd)
+    close (fd);
+
+  *num_ifs = nifs;
+  *ifreqs = (ifreq*)realloc (ifc.ifc_buf, nifs * sizeof (struct ifreq));
+}
+
+static inline struct ifreq *
+__if_nextreq (struct ifreq *ifr)
+{
+  return ifr + 1;
+}
+
+static inline void
+__if_freereq (struct ifreq *ifreqs, int num_ifs)
+{
+  free (ifreqs);
+}
+
+/* Create a linked list of `struct kde_ifaddrs' structures, one for each
+   network interface on the host machine.  If successful, store the
+   list in *IFAP and return 0.  On errors, return -1 and set `errno'.  */
+int
+kde_getifaddrs (struct kde_ifaddrs **ifap)
+{
+  /* This implementation handles only IPv4 interfaces.
+     The various ioctls below will only work on an AF_INET socket.
+     Some different mechanism entirely must be used for IPv6.  */
+  int fd = socket (AF_INET, SOCK_DGRAM, 0);
+  struct ifreq *ifreqs;
+  int nifs;
+
+  if (fd < 0)
+    return -1;
+
+  __ifreq (&ifreqs, &nifs, fd);
+  if (ifreqs == NULL)		/* XXX doesn't distinguish error vs none */
+    {
+      close (fd);
+      return -1;
+    }
+
+  /* Now we have the list of interfaces and each one's address.
+     Put it into the expected format and fill in the remaining details.  */
+  if (nifs == 0)
+    *ifap = NULL;
+  else
+    {
+      struct Storage
+      {
+	struct kde_ifaddrs ia;
+	struct sockaddr addr, netmask, broadaddr;
+	char name[IF_NAMESIZE];
+      } *storage;
+      struct ifreq *ifr;
+      int i;
+
+      storage = (Storage*) malloc (nifs * sizeof storage[0]);
+      if (storage == NULL)
+	{
+	  close (fd);
+	  __if_freereq (ifreqs, nifs);
+	  return -1;
+	}
+
+      i = 0;
+      ifr = ifreqs;
+      do
+	{
+	  /* Fill in all pointers to the storage we've already allocated.  */
+	  storage[i].ia.ifa_next = &storage[i + 1].ia;
+	  storage[i].ia.ifa_addr = &storage[i].addr;
+	  storage[i].ia.ifa_netmask = &storage[i].netmask;
+	  storage[i].ia.ifa_broadaddr = &storage[i].broadaddr; /* & dstaddr */
+
+	  /* Now copy the information we already have from SIOCGIFCONF.  */
+	  storage[i].ia.ifa_name = strncpy (storage[i].name, ifr->ifr_name,
+					    sizeof storage[i].name);
+	  storage[i].addr = ifr->ifr_addr;
+
+	  /* The SIOCGIFCONF call filled in only the name and address.
+	     Now we must also ask for the other information we need.  */
+
+	  if (ioctl (fd, SIOCGIFFLAGS, ifr) < 0)
+	    break;
+	  storage[i].ia.ifa_flags = ifr->ifr_flags;
+
+	  ifr->ifr_addr = storage[i].addr;
+
+	  if (ioctl (fd, SIOCGIFNETMASK, ifr) < 0)
+	    break;
+	  storage[i].netmask = ifr->ifr_netmask;
+
+	  if (ifr->ifr_flags & IFF_BROADCAST)
+	    {
+	      ifr->ifr_addr = storage[i].addr;
+	      if (ioctl (fd, SIOCGIFBRDADDR, ifr) < 0)
+		break;
+	      storage[i].broadaddr = ifr->ifr_broadaddr;
+	    }
+	  else if (ifr->ifr_flags & IFF_POINTOPOINT)
+	    {
+	      ifr->ifr_addr = storage[i].addr;
+	      if (ioctl (fd, SIOCGIFDSTADDR, ifr) < 0)
+		break;
+	      storage[i].broadaddr = ifr->ifr_dstaddr;
+	    }
+	  else
+	    /* Just 'cause.  */
+	    memset (&storage[i].broadaddr, 0, sizeof storage[i].broadaddr);
+
+	  storage[i].ia.ifa_data = NULL; /* Nothing here for now.  */
+
+	  ifr = __if_nextreq (ifr);
+	} while (++i < nifs);
+      if (i < nifs)		/* Broke out early on error.  */
+	{
+	  close (fd);
+	  free (storage);
+	  __if_freereq (ifreqs, nifs);
+	  return -1;
+	}
+
+      storage[i - 1].ia.ifa_next = NULL;
+
+      *ifap = &storage[0].ia;
+
+      close (fd);
+      __if_freereq (ifreqs, nifs);
+    }
+
+  return 0;
+}
+
+void
+kde_freeifaddrs (struct kde_ifaddrs *ifa)
+{
+  free (ifa);
+}
+
+#else
+int kde_getifaddrs(struct kde_ifaddrs **) {
+	return 1;
+}
+void kde_freeifaddrs(struct kde_ifaddrs *) {
+}
+struct { } kde_ifaddrs;
+
+#endif
+
+#endif