ike-cfg: Add helper function to determine address family of IP addresses

All configured static addresses (hostnames, ranges or subnets are not
considered) must be of the same family, otherwise AF_UNSPEC is returned.

diff --git a/src/libcharon/config/ike_cfg.c b/src/libcharon/config/ike_cfg.c
index 9464ceb5dc6517e97479ce3d3812b43881a61173..dee9e4c29696f2cd511d8f64681289d063361bf3 100644 (file)
--- a/src/libcharon/config/ike_cfg.c
+++ b/src/libcharon/config/ike_cfg.c
@@ -1,4 +1,5 @@
 /*
+ * Copyright (C) 2012-2015 Tobias Brunner
  * Copyright (C) 2005-2007 Martin Willi
  * Copyright (C) 2005 Jan Hutter
  * Hochschule fuer Technik Rapperswil
@@ -510,6 +511,52 @@ static void parse_addresses(char *str, linked_list_t *hosts,
        enumerator->destroy(enumerator);
 }
 
+/**
+ * Described in header.
+ */
+int ike_cfg_get_family(ike_cfg_t *cfg, bool local)
+{
+       private_ike_cfg_t *this = (private_ike_cfg_t*)cfg;
+       enumerator_t *enumerator;
+       host_t *host;
+       char *str;
+       int family = AF_UNSPEC;
+
+       if (local)
+       {
+               enumerator = this->my_hosts->create_enumerator(this->my_hosts);
+       }
+       else
+       {
+               enumerator = this->other_hosts->create_enumerator(this->other_hosts);
+       }
+       while (enumerator->enumerate(enumerator, &str))
+       {
+               if (streq(str, "%any"))
+               {       /* ignore %any as its family is undetermined */
+                       continue;
+               }
+               host = host_create_from_string(str, 0);
+               if (host)
+               {
+                       if (family == AF_UNSPEC)
+                       {
+                               family = host->get_family(host);
+                       }
+                       else if (family != host->get_family(host))
+                       {
+                               /* more than one address family defined */
+                               family = AF_UNSPEC;
+                               host->destroy(host);
+                               break;
+                       }
+               }
+               DESTROY_IF(host);
+       }
+       enumerator->destroy(enumerator);
+       return family;
+}
+
 /**
  * Described in header.
  */

diff --git a/src/libcharon/config/ike_cfg.h b/src/libcharon/config/ike_cfg.h
index adfcabf700767f13ece5f999f8561a6da0d149ef..62f5b740c1ada92b06a95a867c7adb10d6a33210 100644 (file)
--- a/src/libcharon/config/ike_cfg.h
+++ b/src/libcharon/config/ike_cfg.h
@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2012 Tobias Brunner
+ * Copyright (C) 2012-2015 Tobias Brunner
  * Copyright (C) 2005-2007 Martin Willi
  * Copyright (C) 2005 Jan Hutter
  * Hochschule fuer Technik Rapperswil
@@ -254,4 +254,15 @@ ike_cfg_t *ike_cfg_create(ike_version_t version, bool certreq, bool force_encap,
                                                  char *other, u_int16_t other_port,
                                                  fragmentation_t fragmentation, u_int8_t dscp);
 
+/**
+ * Determine the address family of the local or remtoe address(es).  If multiple
+ * families are configured AF_UNSPEC is returned.  %any is ignored (%any4|6 are
+ * not though).
+ *
+ * @param local                                TRUE to check local addresses, FALSE for remote
+ * @return                                     address family of address(es) if distinct
+ */
+int ike_cfg_get_family(ike_cfg_t *this, bool local);
+
+
 #endif /** IKE_CFG_H_ @}*/