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[libvirt] [PATCH] Convert virNetwork to use virSocketAddr everywhere



Instead of storing the IP address string in virNetwork related
structs, store the parsed virSocketAddr. This will make it
easier to add IPv6 support in the future, by letting driver
code directly check what address family is present

* src/conf/network_conf.c, src/conf/network_conf.h,
  src/network/bridge_driver.c: Convert to use virSocketAddr
  in virNetwork, instead of char *.
* src/util/bridge.c, src/util/bridge.h,
  src/util/dnsmasq.c, src/util/dnsmasq.h,
  src/util/iptables.c, src/util/iptables.h: Convert to
  take a virSocketAddr instead of char * for any IP
  address parameters
* src/util/network.h: Add macros to determine if an address
  is set, and what address family is set.
---
 src/conf/network_conf.c     |  121 +++++++++++++----------
 src/conf/network_conf.h     |   16 ++--
 src/network/bridge_driver.c |  162 +++++++++++++++++-------------
 src/util/bridge.c           |   14 +--
 src/util/bridge.h           |    5 +-
 src/util/dnsmasq.c          |   17 ++-
 src/util/dnsmasq.h          |    4 +-
 src/util/iptables.c         |  230 +++++++++++++++++++++++++++----------------
 src/util/iptables.h         |   18 ++--
 src/util/network.h          |    6 +
 10 files changed, 353 insertions(+), 240 deletions(-)

diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c
index 0663d52..d13f9e0 100644
--- a/src/conf/network_conf.c
+++ b/src/conf/network_conf.c
@@ -21,8 +21,6 @@
  * Author: Daniel P. Berrange <berrange redhat com>
  */
 
-
-
 #include <config.h>
 
 #include <unistd.h>
@@ -99,27 +97,18 @@ void virNetworkDefFree(virNetworkDefPtr def)
     VIR_FREE(def->name);
     VIR_FREE(def->bridge);
     VIR_FREE(def->forwardDev);
-    VIR_FREE(def->ipAddress);
-    VIR_FREE(def->network);
-    VIR_FREE(def->netmask);
     VIR_FREE(def->domain);
 
-    for (i = 0 ; i < def->nranges && def->ranges ; i++) {
-        VIR_FREE(def->ranges[i].start);
-        VIR_FREE(def->ranges[i].end);
-    }
     VIR_FREE(def->ranges);
 
     for (i = 0 ; i < def->nhosts && def->hosts ; i++) {
         VIR_FREE(def->hosts[i].mac);
-        VIR_FREE(def->hosts[i].ip);
         VIR_FREE(def->hosts[i].name);
     }
     VIR_FREE(def->hosts);
 
     VIR_FREE(def->tftproot);
     VIR_FREE(def->bootfile);
-    VIR_FREE(def->bootserver);
 
     VIR_FREE(def);
 }
@@ -270,9 +259,8 @@ virNetworkDHCPRangeDefParseXML(virNetworkDefPtr def,
                 virReportOOMError();
                 return -1;
             }
-            def->ranges[def->nranges].start = (char *)start;
-            def->ranges[def->nranges].end = (char *)end;
-            def->ranges[def->nranges].size = range;
+            def->ranges[def->nranges].start = saddr;
+            def->ranges[def->nranges].end = eaddr;
             def->nranges++;
         } else if (cur->type == XML_ELEMENT_NODE &&
             xmlStrEqual(cur->name, BAD_CAST "host")) {
@@ -321,20 +309,26 @@ virNetworkDHCPRangeDefParseXML(virNetworkDefPtr def,
             }
             def->hosts[def->nhosts].mac = (char *)mac;
             def->hosts[def->nhosts].name = (char *)name;
-            def->hosts[def->nhosts].ip = (char *)ip;
+            def->hosts[def->nhosts].ip = inaddr;
             def->nhosts++;
 
         } else if (cur->type == XML_ELEMENT_NODE &&
             xmlStrEqual(cur->name, BAD_CAST "bootp")) {
             xmlChar *file;
+            xmlChar *server;
+            virSocketAddr inaddr;
 
             if (!(file = xmlGetProp(cur, BAD_CAST "file"))) {
                 cur = cur->next;
                 continue;
             }
+            server = xmlGetProp(cur, BAD_CAST "server");
+
+            if (virSocketParseAddr((const char *)server, &inaddr, AF_UNSPEC) < 0)
+                return -1;
 
             def->bootfile = (char *)file;
-            def->bootserver = (char *) xmlGetProp(cur, BAD_CAST "server");
+            def->bootserver = inaddr;
         }
 
         cur = cur->next;
@@ -378,6 +372,8 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt)
 {
     virNetworkDefPtr def;
     char *tmp;
+    char *ipAddress;
+    char *netmask;
 
     if (VIR_ALLOC(def) < 0) {
         virReportOOMError();
@@ -421,49 +417,41 @@ virNetworkDefParseXML(xmlXPathContextPtr ctxt)
     if (virXPathULong("string(./bridge[1]/@delay)", ctxt, &def->delay) < 0)
         def->delay = 0;
 
-    def->ipAddress = virXPathString("string(./ip[1]/@address)", ctxt);
-    def->netmask = virXPathString("string(./ip[1]/@netmask)", ctxt);
-    if (def->ipAddress &&
-        def->netmask) {
-        virSocketAddr inaddress, innetmask;
-        char *netaddr;
+    ipAddress = virXPathString("string(./ip[1]/@address)", ctxt);
+    netmask = virXPathString("string(./ip[1]/@netmask)", ctxt);
+    if (ipAddress &&
+        netmask) {
         xmlNodePtr ip;
 
-        if (virSocketParseAddr(def->ipAddress, &inaddress, AF_UNSPEC) < 0)
+        if (virSocketParseAddr(ipAddress, &def->ipAddress, AF_UNSPEC) < 0)
             goto error;
-        if (virSocketParseAddr(def->netmask, &innetmask, AF_UNSPEC) < 0)
+        if (virSocketParseAddr(netmask, &def->netmask, AF_UNSPEC) < 0)
             goto error;
 
         /* XXX someday we want IPv6, so will need to relax this */
-        if (inaddress.data.sa.sa_family != AF_INET ||
-            innetmask.data.sa.sa_family != AF_INET) {
+        if (!VIR_SOCKET_IS_FAMILY(&def->ipAddress, AF_INET) ||
+            !VIR_SOCKET_IS_FAMILY(&def->netmask, AF_INET)) {
             virNetworkReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                                   "%s", _("Only IPv4 addresses are supported"));
             goto error;
         }
 
-        inaddress.data.inet4.sin_addr.s_addr &=
-            innetmask.data.inet4.sin_addr.s_addr;
-        if (!(netaddr = virSocketFormatAddr(&inaddress)))
-            goto error;
-
-        if (virAsprintf(&def->network, "%s/%s", netaddr, def->netmask) < 0) {
-            VIR_FREE(netaddr);
-            virReportOOMError();
-            goto error;
-        }
-        VIR_FREE(netaddr);
+        def->network = def->ipAddress;
+        def->network.data.inet4.sin_addr.s_addr &=
+            def->netmask.data.inet4.sin_addr.s_addr;
 
         if ((ip = virXPathNode("./ip[1]", ctxt)) &&
             virNetworkIPParseXML(def, ip) < 0)
             goto error;
     }
+    VIR_FREE(ipAddress);
+    VIR_FREE(netmask);
 
 
     /* IPv4 forwarding setup */
     if (virXPathBoolean("count(./forward) > 0", ctxt)) {
-        if (!def->ipAddress ||
-            !def->netmask) {
+        if (def->ipAddress.data.sa.sa_family != AF_INET ||
+            def->netmask.data.sa.sa_family != AF_INET) {
             virNetworkReportError(VIR_ERR_INTERNAL_ERROR,
                                   "%s", _("Forwarding requested, but no IPv4 address/netmask provided"));
             goto error;
@@ -583,14 +571,25 @@ char *virNetworkDefFormat(const virNetworkDefPtr def)
     if (def->domain)
         virBufferVSprintf(&buf, "  <domain name='%s'/>\n", def->domain);
 
-    if (def->ipAddress || def->netmask) {
+    if (VIR_SOCKET_HAS_ADDR(&def->ipAddress) ||
+        VIR_SOCKET_HAS_ADDR(&def->netmask)) {
         virBufferAddLit(&buf, "  <ip");
 
-        if (def->ipAddress)
-            virBufferVSprintf(&buf, " address='%s'", def->ipAddress);
+        if (VIR_SOCKET_HAS_ADDR(&def->ipAddress)) {
+            char *addr = virSocketFormatAddr(&def->ipAddress);
+            if (!addr)
+                goto error;
+            virBufferVSprintf(&buf, " address='%s'", addr);
+            VIR_FREE(addr);
+        }
 
-        if (def->netmask)
-            virBufferVSprintf(&buf, " netmask='%s'", def->netmask);
+        if (VIR_SOCKET_HAS_ADDR(&def->netmask)) {
+            char *addr = virSocketFormatAddr(&def->netmask);
+            if (!addr)
+                goto error;
+            virBufferVSprintf(&buf, " netmask='%s'", addr);
+            VIR_FREE(addr);
+        }
 
         virBufferAddLit(&buf, ">\n");
 
@@ -601,25 +600,44 @@ char *virNetworkDefFormat(const virNetworkDefPtr def)
         if ((def->nranges || def->nhosts)) {
             int i;
             virBufferAddLit(&buf, "    <dhcp>\n");
-            for (i = 0 ; i < def->nranges ; i++)
+            for (i = 0 ; i < def->nranges ; i++) {
+                char *saddr = virSocketFormatAddr(&def->ranges[i].start);
+                if (!saddr)
+                    goto error;
+                char *eaddr = virSocketFormatAddr(&def->ranges[i].end);
+                if (!eaddr) {
+                    VIR_FREE(saddr);
+                    goto error;
+                }
                 virBufferVSprintf(&buf, "      <range start='%s' end='%s' />\n",
-                                  def->ranges[i].start, def->ranges[i].end);
+                                  saddr, eaddr);
+                VIR_FREE(saddr);
+                VIR_FREE(eaddr);
+            }
             for (i = 0 ; i < def->nhosts ; i++) {
                 virBufferAddLit(&buf, "      <host ");
                 if (def->hosts[i].mac)
                     virBufferVSprintf(&buf, "mac='%s' ", def->hosts[i].mac);
                 if (def->hosts[i].name)
                     virBufferVSprintf(&buf, "name='%s' ", def->hosts[i].name);
-                if (def->hosts[i].ip)
-                    virBufferVSprintf(&buf, "ip='%s' ", def->hosts[i].ip);
+                if (VIR_SOCKET_HAS_ADDR(&def->hosts[i].ip)) {
+                    char *ipaddr = virSocketFormatAddr(&def->hosts[i].ip);
+                    if (!ipaddr)
+                        goto error;
+                    virBufferVSprintf(&buf, "ip='%s' ", ipaddr);
+                    VIR_FREE(ipaddr);
+                }
                 virBufferAddLit(&buf, "/>\n");
             }
             if (def->bootfile) {
                 virBufferEscapeString(&buf, "      <bootp file='%s' ",
                                       def->bootfile);
-                if (def->bootserver) {
-                    virBufferEscapeString(&buf, "server='%s' ",
-                                          def->bootserver);
+                if (VIR_SOCKET_HAS_ADDR(&def->bootserver)) {
+                    char *ipaddr = virSocketFormatAddr(&def->bootserver);
+                    if (!ipaddr)
+                        goto error;
+                    virBufferEscapeString(&buf, "server='%s' ", ipaddr);
+                    VIR_FREE(ipaddr);
                 }
                 virBufferAddLit(&buf, "/>\n");
             }
@@ -639,6 +657,7 @@ char *virNetworkDefFormat(const virNetworkDefPtr def)
 
  no_memory:
     virReportOOMError();
+  error:
     virBufferFreeAndReset(&buf);
     return NULL;
 }
diff --git a/src/conf/network_conf.h b/src/conf/network_conf.h
index c4956b6..5a01bbf 100644
--- a/src/conf/network_conf.h
+++ b/src/conf/network_conf.h
@@ -30,6 +30,7 @@
 
 # include "internal.h"
 # include "threads.h"
+# include "network.h"
 
 /* 2 possible types of forwarding */
 enum virNetworkForwardType {
@@ -43,9 +44,8 @@ enum virNetworkForwardType {
 typedef struct _virNetworkDHCPRangeDef virNetworkDHCPRangeDef;
 typedef virNetworkDHCPRangeDef *virNetworkDHCPRangeDefPtr;
 struct _virNetworkDHCPRangeDef {
-    char *start;
-    char *end;
-    int size;
+    virSocketAddr start;
+    virSocketAddr end;
 };
 
 typedef struct _virNetworkDHCPHostDef virNetworkDHCPHostDef;
@@ -53,7 +53,7 @@ typedef virNetworkDHCPHostDef *virNetworkDHCPHostDefPtr;
 struct _virNetworkDHCPHostDef {
     char *mac;
     char *name;
-    char *ip;
+    virSocketAddr ip;
 };
 
 typedef struct _virNetworkDef virNetworkDef;
@@ -70,9 +70,9 @@ struct _virNetworkDef {
     int forwardType;    /* One of virNetworkForwardType constants */
     char *forwardDev;   /* Destination device for forwarding */
 
-    char *ipAddress;    /* Bridge IP address */
-    char *netmask;
-    char *network;
+    virSocketAddr ipAddress;    /* Bridge IP address */
+    virSocketAddr netmask;
+    virSocketAddr network;
 
     unsigned int nranges;        /* Zero or more dhcp ranges */
     virNetworkDHCPRangeDefPtr ranges;
@@ -82,7 +82,7 @@ struct _virNetworkDef {
 
     char *tftproot;
     char *bootfile;
-    char *bootserver;
+    virSocketAddr bootserver;
 };
 
 typedef struct _virNetworkObj virNetworkObj;
diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index 37ed32e..5ee47eb 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -143,7 +143,7 @@ networkFindActiveConfigs(struct network_driver *driver) {
             obj->active = 1;
 
             /* Finally try and read dnsmasq pid if any */
-            if ((obj->def->ipAddress ||
+            if ((VIR_SOCKET_HAS_ADDR(&obj->def->ipAddress) ||
                  obj->def->nranges) &&
                 virFileReadPid(NETWORK_PID_DIR, obj->def->name,
                                &obj->dnsmasqPid) == 0) {
@@ -375,8 +375,8 @@ networkSaveDnsmasqHostsfile(virNetworkObjPtr network,
 
     for (i = 0 ; i < network->def->nhosts ; i++) {
         virNetworkDHCPHostDefPtr host = &(network->def->hosts[i]);
-        if ((host->mac) && (host->ip))
-            dnsmasqAddDhcpHost(dctx, host->mac, host->ip, host->name);
+        if ((host->mac) && VIR_SOCKET_HAS_ADDR(&host->ip))
+            dnsmasqAddDhcpHost(dctx, host->mac, &host->ip, host->name);
     }
 
     if (dnsmasqSave(dctx) < 0)
@@ -395,6 +395,7 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
     char *pidfileArg;
     char buf[1024];
     unsigned int ranges;
+    char *ipAddr;
 
     /*
      * For static-only DHCP, i.e. with no range but at least one host element,
@@ -491,27 +492,46 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
      * APPEND_ARG(*argv, i++, network->def->bridge);
      */
     APPEND_ARG(*argv, i++, "--listen-address");
-    APPEND_ARG(*argv, i++, network->def->ipAddress);
+    if (!(ipAddr = virSocketFormatAddr(&network->def->ipAddress)))
+        goto error;
+    APPEND_ARG_LIT(*argv, i++, ipAddr);
 
     APPEND_ARG(*argv, i++, "--except-interface");
     APPEND_ARG(*argv, i++, "lo");
 
     for (r = 0 ; r < network->def->nranges ; r++) {
-        snprintf(buf, sizeof(buf), "%s,%s",
-                 network->def->ranges[r].start,
-                 network->def->ranges[r].end);
-
+        char *saddr = virSocketFormatAddr(&network->def->ranges[r].start);
+        if (!saddr)
+            goto error;
+        char *eaddr = virSocketFormatAddr(&network->def->ranges[r].end);
+        if (!eaddr) {
+            VIR_FREE(saddr);
+            goto error;
+        }
+        char *range;
+        int rc = virAsprintf(&range, "%s,%s", saddr, eaddr);
+        VIR_FREE(saddr);
+        VIR_FREE(eaddr);
+        if (rc < 0)
+            goto no_memory;
         APPEND_ARG(*argv, i++, "--dhcp-range");
-        APPEND_ARG(*argv, i++, buf);
-        nbleases += network->def->ranges[r].size;
+        APPEND_ARG_LIT(*argv, i++, range);
+        nbleases += virSocketGetRange(&network->def->ranges[r].start,
+                                      &network->def->ranges[r].end);
     }
 
     if (!network->def->nranges && network->def->nhosts) {
-        snprintf(buf, sizeof(buf), "%s,static",
-                 network->def->ipAddress);
+        char *ipaddr = virSocketFormatAddr(&network->def->ipAddress);
+        if (!ipaddr)
+            goto error;
+        char *range;
+        int rc = virAsprintf(&range, "%s,static", ipaddr);
+        VIR_FREE(ipaddr);
+        if (rc < 0)
+            goto no_memory;
 
         APPEND_ARG(*argv, i++, "--dhcp-range");
-        APPEND_ARG(*argv, i++, buf);
+        APPEND_ARG_LIT(*argv, i++, range);
     }
 
     if (network->def->nranges > 0) {
@@ -546,13 +566,22 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
         APPEND_ARG(*argv, i++, network->def->tftproot);
     }
     if (network->def->bootfile) {
-        snprintf(buf, sizeof(buf), "%s%s%s",
-                 network->def->bootfile,
-                 network->def->bootserver ? ",," : "",
-                 network->def->bootserver ? network->def->bootserver : "");
+        char *ipaddr = NULL;
+        if (VIR_SOCKET_HAS_ADDR(&network->def->bootserver)) {
+            if (!(ipaddr = virSocketFormatAddr(&network->def->bootserver)))
+                goto error;
+        }
+        char *boot;
+        int rc = virAsprintf(&boot, "%s%s%s",
+                             network->def->bootfile,
+                             ipaddr ? ",," : "",
+                             ipaddr ? ipaddr : "");
+        VIR_FREE(ipaddr);
+        if (rc < 0)
+            goto no_memory;
 
         APPEND_ARG(*argv, i++, "--dhcp-boot");
-        APPEND_ARG(*argv, i++, buf);
+        APPEND_ARG_LIT(*argv, i++, boot);
     }
 
 #undef APPEND_ARG
@@ -560,12 +589,13 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
     return 0;
 
  no_memory:
+    virReportOOMError();
+  error:
     if (*argv) {
         for (i = 0; (*argv)[i]; i++)
             VIR_FREE((*argv)[i]);
         VIR_FREE(*argv);
     }
-    virReportOOMError();
     return -1;
 }
 
@@ -579,9 +609,9 @@ dhcpStartDhcpDaemon(virNetworkObjPtr network)
 
     network->dnsmasqPid = -1;
 
-    if (network->def->ipAddress == NULL) {
+    if (!VIR_SOCKET_IS_FAMILY(&network->def->ipAddress, AF_INET)) {
         networkReportError(VIR_ERR_INTERNAL_ERROR,
-                           "%s", _("cannot start dhcp daemon without IP address for server"));
+                           "%s", _("cannot start dhcp daemon without IPv4 address for server"));
         return -1;
     }
 
@@ -641,7 +671,7 @@ networkAddMasqueradingIptablesRules(struct network_driver *driver,
     int err;
     /* allow forwarding packets from the bridge interface */
     if ((err = iptablesAddForwardAllowOut(driver->iptables,
-                                          network->def->network,
+                                          &network->def->network,
                                           network->def->bridge,
                                           network->def->forwardDev))) {
         virReportSystemError(err,
@@ -652,7 +682,7 @@ networkAddMasqueradingIptablesRules(struct network_driver *driver,
 
     /* allow forwarding packets to the bridge interface if they are part of an existing connection */
     if ((err = iptablesAddForwardAllowRelatedIn(driver->iptables,
-                                         network->def->network,
+                                         &network->def->network,
                                          network->def->bridge,
                                          network->def->forwardDev))) {
         virReportSystemError(err,
@@ -686,7 +716,7 @@ networkAddMasqueradingIptablesRules(struct network_driver *driver,
 
     /* First the generic masquerade rule for other protocols */
     if ((err = iptablesAddForwardMasquerade(driver->iptables,
-                                            network->def->network,
+                                            &network->def->network,
                                             network->def->forwardDev,
                                             NULL))) {
         virReportSystemError(err,
@@ -697,7 +727,7 @@ networkAddMasqueradingIptablesRules(struct network_driver *driver,
 
     /* UDP with a source port restriction */
     if ((err = iptablesAddForwardMasquerade(driver->iptables,
-                                            network->def->network,
+                                            &network->def->network,
                                             network->def->forwardDev,
                                             "udp"))) {
         virReportSystemError(err,
@@ -708,7 +738,7 @@ networkAddMasqueradingIptablesRules(struct network_driver *driver,
 
     /* TCP with a source port restriction */
     if ((err = iptablesAddForwardMasquerade(driver->iptables,
-                                            network->def->network,
+                                            &network->def->network,
                                             network->def->forwardDev,
                                             "tcp"))) {
         virReportSystemError(err,
@@ -721,22 +751,22 @@ networkAddMasqueradingIptablesRules(struct network_driver *driver,
 
  masqerr5:
     iptablesRemoveForwardMasquerade(driver->iptables,
-                                    network->def->network,
+                                    &network->def->network,
                                     network->def->forwardDev,
                                     "udp");
  masqerr4:
     iptablesRemoveForwardMasquerade(driver->iptables,
-                                    network->def->network,
+                                    &network->def->network,
                                     network->def->forwardDev,
                                     NULL);
  masqerr3:
     iptablesRemoveForwardAllowRelatedIn(driver->iptables,
-                                 network->def->network,
+                                 &network->def->network,
                                  network->def->bridge,
                                  network->def->forwardDev);
  masqerr2:
     iptablesRemoveForwardAllowOut(driver->iptables,
-                                  network->def->network,
+                                  &network->def->network,
                                   network->def->bridge,
                                   network->def->forwardDev);
  masqerr1:
@@ -749,7 +779,7 @@ networkAddRoutingIptablesRules(struct network_driver *driver,
     int err;
     /* allow routing packets from the bridge interface */
     if ((err = iptablesAddForwardAllowOut(driver->iptables,
-                                          network->def->network,
+                                          &network->def->network,
                                           network->def->bridge,
                                           network->def->forwardDev))) {
         virReportSystemError(err,
@@ -760,7 +790,7 @@ networkAddRoutingIptablesRules(struct network_driver *driver,
 
     /* allow routing packets to the bridge interface */
     if ((err = iptablesAddForwardAllowIn(driver->iptables,
-                                         network->def->network,
+                                         &network->def->network,
                                          network->def->bridge,
                                          network->def->forwardDev))) {
         virReportSystemError(err,
@@ -774,7 +804,7 @@ networkAddRoutingIptablesRules(struct network_driver *driver,
 
  routeerr2:
     iptablesRemoveForwardAllowOut(driver->iptables,
-                                  network->def->network,
+                                  &network->def->network,
                                   network->def->bridge,
                                   network->def->forwardDev);
  routeerr1:
@@ -866,7 +896,8 @@ networkAddIptablesRules(struct network_driver *driver,
      * aborting, since not all iptables implementations support it).
      */
 
-    if ((network->def->ipAddress || network->def->nranges) &&
+    if ((VIR_SOCKET_HAS_ADDR(&network->def->ipAddress) ||
+         network->def->nranges) &&
         (iptablesAddOutputFixUdpChecksum(driver->iptables,
                                          network->def->bridge, 68) != 0)) {
         VIR_WARN("Could not add rule to fixup DHCP response checksums "
@@ -904,36 +935,37 @@ networkAddIptablesRules(struct network_driver *driver,
 static void
 networkRemoveIptablesRules(struct network_driver *driver,
                          virNetworkObjPtr network) {
-    if (network->def->ipAddress || network->def->nranges) {
+    if (VIR_SOCKET_HAS_ADDR(&network->def->ipAddress) ||
+        network->def->nranges) {
         iptablesRemoveOutputFixUdpChecksum(driver->iptables,
                                            network->def->bridge, 68);
     }
     if (network->def->forwardType != VIR_NETWORK_FORWARD_NONE) {
         if (network->def->forwardType == VIR_NETWORK_FORWARD_NAT) {
             iptablesRemoveForwardMasquerade(driver->iptables,
-                                            network->def->network,
+                                            &network->def->network,
                                             network->def->forwardDev,
                                             "tcp");
             iptablesRemoveForwardMasquerade(driver->iptables,
-                                            network->def->network,
+                                            &network->def->network,
                                             network->def->forwardDev,
                                             "udp");
             iptablesRemoveForwardMasquerade(driver->iptables,
-                                            network->def->network,
+                                            &network->def->network,
                                             network->def->forwardDev,
                                             NULL);
             iptablesRemoveForwardAllowRelatedIn(driver->iptables,
-                                                network->def->network,
+                                                &network->def->network,
                                                 network->def->bridge,
                                                 network->def->forwardDev);
         } else if (network->def->forwardType == VIR_NETWORK_FORWARD_ROUTE)
             iptablesRemoveForwardAllowIn(driver->iptables,
-                                         network->def->network,
+                                         &network->def->network,
                                          network->def->bridge,
                                          network->def->forwardDev);
 
         iptablesRemoveForwardAllowOut(driver->iptables,
-                                      network->def->network,
+                                      &network->def->network,
                                       network->def->bridge,
                                       network->def->forwardDev);
     }
@@ -1041,25 +1073,15 @@ static int networkCheckRouteCollision(virNetworkObjPtr network)
     unsigned int net_dest;
     char *cur, *buf = NULL;
     enum {MAX_ROUTE_SIZE = 1024*64};
-    virSocketAddr inaddress, innetmask;
-
-    if (!network->def->ipAddress || !network->def->netmask)
-        return 0;
-
-    if (virSocketParseAddr(network->def->ipAddress, &inaddress, AF_UNSPEC) < 0)
-        goto error;
 
-    if (virSocketParseAddr(network->def->netmask, &innetmask, AF_UNSPEC) < 0)
-        goto error;
-
-    if (inaddress.data.stor.ss_family != AF_INET ||
-        innetmask.data.stor.ss_family != AF_INET) {
+    if (!VIR_SOCKET_IS_FAMILY(&network->def->ipAddress, AF_INET) ||
+        !VIR_SOCKET_IS_FAMILY(&network->def->netmask, AF_INET)) {
         /* Only support collision check for IPv4 */
-        goto out;
+        return 0;
     }
 
-    net_dest = (inaddress.data.inet4.sin_addr.s_addr &
-                innetmask.data.inet4.sin_addr.s_addr);
+    net_dest = (network->def->ipAddress.data.inet4.sin_addr.s_addr &
+                network->def->netmask.data.inet4.sin_addr.s_addr);
 
     /* Read whole routing table into memory */
     if ((len = virFileReadAll(PROC_NET_ROUTE, MAX_ROUTE_SIZE, &buf)) < 0)
@@ -1112,12 +1134,10 @@ static int networkCheckRouteCollision(virNetworkObjPtr network)
         addr_val &= mask_val;
 
         if ((net_dest == addr_val) &&
-            (innetmask.data.inet4.sin_addr.s_addr == mask_val)) {
+            (network->def->netmask.data.inet4.sin_addr.s_addr == mask_val)) {
             networkReportError(VIR_ERR_INTERNAL_ERROR,
-                              _("Network %s/%s is already in use by "
-                                "interface %s"),
-                                network->def->ipAddress,
-                                network->def->netmask, iface);
+                               _("Network is already in use by interface %s"),
+                               iface);
             goto error;
         }
     }
@@ -1160,19 +1180,21 @@ static int networkStartNetworkDaemon(struct network_driver *driver,
     if (brSetEnableSTP(driver->brctl, network->def->bridge, network->def->stp ? 1 : 0) < 0)
         goto err_delbr;
 
-    if (network->def->ipAddress &&
-        (err = brSetInetAddress(driver->brctl, network->def->bridge, network->def->ipAddress))) {
+    if (VIR_SOCKET_HAS_ADDR(&network->def->ipAddress) &&
+        (err = brSetInetAddress(driver->brctl, network->def->bridge,
+                                &network->def->ipAddress))) {
         virReportSystemError(err,
-                             _("cannot set IP address on bridge '%s' to '%s'"),
-                             network->def->bridge, network->def->ipAddress);
+                             _("cannot set IP address on bridge '%s'"),
+                             network->def->bridge);
         goto err_delbr;
     }
 
-    if (network->def->netmask &&
-        (err = brSetInetNetmask(driver->brctl, network->def->bridge, network->def->netmask))) {
+    if (VIR_SOCKET_HAS_ADDR(&network->def->netmask) &&
+        (err = brSetInetNetmask(driver->brctl, network->def->bridge,
+                                &network->def->netmask))) {
         virReportSystemError(err,
-                             _("cannot set netmask on bridge '%s' to '%s'"),
-                             network->def->bridge, network->def->netmask);
+                             _("cannot set netmask on bridge '%s'"),
+                             network->def->bridge);
         goto err_delbr;
     }
 
@@ -1193,7 +1215,7 @@ static int networkStartNetworkDaemon(struct network_driver *driver,
         goto err_delbr2;
     }
 
-    if ((network->def->ipAddress ||
+    if ((VIR_SOCKET_HAS_ADDR(&network->def->ipAddress) ||
          network->def->nranges) &&
         dhcpStartDhcpDaemon(network) < 0)
         goto err_delbr2;
diff --git a/src/util/bridge.c b/src/util/bridge.c
index b4a7e26..6a94ec0 100644
--- a/src/util/bridge.c
+++ b/src/util/bridge.c
@@ -659,9 +659,8 @@ static int
 brSetInetAddr(brControl *ctl,
               const char *ifname,
               int cmd,
-              const char *addr)
+              virSocketAddr *addr)
 {
-    virSocketAddr sa;
     struct ifreq ifr;
 
     if (!ctl || !ctl->fd || !ifname || !addr)
@@ -672,13 +671,10 @@ brSetInetAddr(brControl *ctl,
     if (virStrcpyStatic(ifr.ifr_name, ifname) == NULL)
         return EINVAL;
 
-    if (virSocketParseAddr(addr, &sa, AF_UNSPEC) < 0)
+    if (!VIR_SOCKET_IS_FAMILY(addr, AF_INET))
         return EINVAL;
 
-    if (sa.data.sa.sa_family != AF_INET)
-        return EINVAL;
-
-    ifr.ifr_addr = sa.data.sa;
+    ifr.ifr_addr = addr->data.sa;
 
     if (ioctl(ctl->fd, cmd, &ifr) < 0)
         return errno;
@@ -702,7 +698,7 @@ brSetInetAddr(brControl *ctl,
 int
 brSetInetAddress(brControl *ctl,
                  const char *ifname,
-                 const char *addr)
+                 virSocketAddr *addr)
 {
     return brSetInetAddr(ctl, ifname, SIOCSIFADDR, addr);
 }
@@ -723,7 +719,7 @@ brSetInetAddress(brControl *ctl,
 int
 brSetInetNetmask(brControl *ctl,
                  const char *ifname,
-                 const char *addr)
+                 virSocketAddr *addr)
 {
     return brSetInetAddr(ctl, ifname, SIOCSIFNETMASK, addr);
 }
diff --git a/src/util/bridge.h b/src/util/bridge.h
index abcd1b5..3ef38d9 100644
--- a/src/util/bridge.h
+++ b/src/util/bridge.h
@@ -28,6 +28,7 @@
 
 #  include <net/if.h>
 #  include <netinet/in.h>
+#  include "network.h"
 
 /**
  * BR_IFNAME_MAXLEN:
@@ -84,10 +85,10 @@ int     brGetInterfaceUp        (brControl *ctl,
 
 int     brSetInetAddress        (brControl *ctl,
                                  const char *ifname,
-                                 const char *addr);
+                                 virSocketAddr *addr);
 int     brSetInetNetmask        (brControl *ctl,
                                  const char *ifname,
-                                 const char *netmask);
+                                 virSocketAddr *addr);
 
 int     brSetForwardDelay       (brControl *ctl,
                                  const char *bridge,
diff --git a/src/util/dnsmasq.c b/src/util/dnsmasq.c
index a96b524..2cb25bf 100644
--- a/src/util/dnsmasq.c
+++ b/src/util/dnsmasq.c
@@ -76,23 +76,28 @@ hostsfileFree(dnsmasqHostsfile *hostsfile)
 static int
 hostsfileAdd(dnsmasqHostsfile *hostsfile,
              const char *mac,
-             const char *ip,
+             virSocketAddr *ip,
              const char *name)
 {
+    char *ipstr;
     if (VIR_REALLOC_N(hostsfile->hosts, hostsfile->nhosts + 1) < 0)
         goto alloc_error;
 
+    if (!(ipstr = virSocketFormatAddr(ip)))
+        return -1;
+
     if (name) {
         if (virAsprintf(&hostsfile->hosts[hostsfile->nhosts].host, "%s,%s,%s",
-                        mac, ip, name) < 0) {
+                        mac, ipstr, name) < 0) {
             goto alloc_error;
         }
     } else {
         if (virAsprintf(&hostsfile->hosts[hostsfile->nhosts].host, "%s,%s",
-                        mac, ip) < 0) {
+                        mac, ipstr) < 0) {
             goto alloc_error;
         }
     }
+    VIR_FREE(ipstr);
 
     hostsfile->nhosts++;
 
@@ -100,7 +105,7 @@ hostsfileAdd(dnsmasqHostsfile *hostsfile,
 
  alloc_error:
     virReportOOMError();
-
+    VIR_FREE(ipstr);
     return -1;
 }
 
@@ -279,7 +284,7 @@ dnsmasqContextFree(dnsmasqContext *ctx)
  * dnsmasqAddDhcpHost:
  * @ctx: pointer to the dnsmasq context for each network
  * @mac: pointer to the string contains mac address of the host
- * @ip: pointer to the string contains ip address of the host
+ * @ip: pointer to the socket address contains ip of the host
  * @name: pointer to the string contains hostname of the host or NULL
  *
  * Add dhcp-host entry.
@@ -287,7 +292,7 @@ dnsmasqContextFree(dnsmasqContext *ctx)
 void
 dnsmasqAddDhcpHost(dnsmasqContext *ctx,
                    const char *mac,
-                   const char *ip,
+                   virSocketAddr *ip,
                    const char *name)
 {
     if (ctx->hostsfile)
diff --git a/src/util/dnsmasq.h b/src/util/dnsmasq.h
index 121ccad..02a961f 100644
--- a/src/util/dnsmasq.h
+++ b/src/util/dnsmasq.h
@@ -22,6 +22,8 @@
 #ifndef __DNSMASQ_H__
 # define __DNSMASQ_H__
 
+# include "network.h"
+
 typedef struct
 {
     /*
@@ -50,7 +52,7 @@ dnsmasqContext * dnsmasqContextNew(const char *network_name,
 void             dnsmasqContextFree(dnsmasqContext *ctx);
 void             dnsmasqAddDhcpHost(dnsmasqContext *ctx,
                                     const char *mac,
-                                    const char *ip,
+                                    virSocketAddr *ip,
                                     const char *name);
 int              dnsmasqSave(const dnsmasqContext *ctx);
 int              dnsmasqDelete(const dnsmasqContext *ctx);
diff --git a/src/util/iptables.c b/src/util/iptables.c
index 1b905bb..64efd45 100644
--- a/src/util/iptables.c
+++ b/src/util/iptables.c
@@ -44,6 +44,10 @@
 #include "virterror_internal.h"
 #include "logging.h"
 
+#define iptablesError(code, ...)                                        \
+    virReportErrorHelper(NULL, VIR_FROM_NONE, code, __FILE__,           \
+                         __FUNCTION__, __LINE__, __VA_ARGS__)
+
 enum {
     ADD = 0,
     REMOVE
@@ -324,27 +328,41 @@ iptablesRemoveUdpInput(iptablesContext *ctx,
  */
 static int
 iptablesForwardAllowOut(iptablesContext *ctx,
-                         const char *network,
+                         virSocketAddr *network,
                          const char *iface,
                          const char *physdev,
                          int action)
 {
+    int ret;
+    char *networkstr;
+
+    if (!VIR_SOCKET_IS_FAMILY(network, AF_INET)) {
+        iptablesError(VIR_ERR_CONFIG_UNSUPPORTED,
+                      _("Only IPv4 addresses can be used with iptables"));
+        return -1;
+    }
+
+    if (!(networkstr = virSocketFormatAddr(network)))
+        return -1;
+
     if (physdev && physdev[0]) {
-        return iptablesAddRemoveRule(ctx->forward_filter,
-                                     action,
-                                     "--source", network,
-                                     "--in-interface", iface,
-                                     "--out-interface", physdev,
-                                     "--jump", "ACCEPT",
-                                     NULL);
+        ret = iptablesAddRemoveRule(ctx->forward_filter,
+                                    action,
+                                    "--source", networkstr,
+                                    "--in-interface", iface,
+                                    "--out-interface", physdev,
+                                    "--jump", "ACCEPT",
+                                    NULL);
     } else {
-        return iptablesAddRemoveRule(ctx->forward_filter,
-                                     action,
-                                     "--source", network,
-                                     "--in-interface", iface,
-                                     "--jump", "ACCEPT",
-                                     NULL);
+        ret = iptablesAddRemoveRule(ctx->forward_filter,
+                                    action,
+                                    "--source", networkstr,
+                                    "--in-interface", iface,
+                                    "--jump", "ACCEPT",
+                                    NULL);
     }
+    VIR_FREE(networkstr);
+    return ret;
 }
 
 /**
@@ -362,7 +380,7 @@ iptablesForwardAllowOut(iptablesContext *ctx,
  */
 int
 iptablesAddForwardAllowOut(iptablesContext *ctx,
-                            const char *network,
+                            virSocketAddr *network,
                             const char *iface,
                             const char *physdev)
 {
@@ -384,7 +402,7 @@ iptablesAddForwardAllowOut(iptablesContext *ctx,
  */
 int
 iptablesRemoveForwardAllowOut(iptablesContext *ctx,
-                               const char *network,
+                               virSocketAddr *network,
                                const char *iface,
                                const char *physdev)
 {
@@ -397,31 +415,45 @@ iptablesRemoveForwardAllowOut(iptablesContext *ctx,
  */
 static int
 iptablesForwardAllowRelatedIn(iptablesContext *ctx,
-                       const char *network,
+                       virSocketAddr *network,
                        const char *iface,
                        const char *physdev,
                        int action)
 {
+    int ret;
+    char *networkstr;
+
+    if (!VIR_SOCKET_IS_FAMILY(network, AF_INET)) {
+        iptablesError(VIR_ERR_CONFIG_UNSUPPORTED,
+                      _("Only IPv4 addresses can be used with iptables"));
+        return -1;
+    }
+
+    if (!(networkstr = virSocketFormatAddr(network)))
+        return -1;
+
     if (physdev && physdev[0]) {
-        return iptablesAddRemoveRule(ctx->forward_filter,
-                                     action,
-                                     "--destination", network,
-                                     "--in-interface", physdev,
-                                     "--out-interface", iface,
-                                     "--match", "state",
-                                     "--state", "ESTABLISHED,RELATED",
-                                     "--jump", "ACCEPT",
-                                     NULL);
+        ret = iptablesAddRemoveRule(ctx->forward_filter,
+                                    action,
+                                    "--destination", networkstr,
+                                    "--in-interface", physdev,
+                                    "--out-interface", iface,
+                                    "--match", "state",
+                                    "--state", "ESTABLISHED,RELATED",
+                                    "--jump", "ACCEPT",
+                                    NULL);
     } else {
-        return iptablesAddRemoveRule(ctx->forward_filter,
-                                     action,
-                                     "--destination", network,
-                                     "--out-interface", iface,
-                                     "--match", "state",
-                                     "--state", "ESTABLISHED,RELATED",
-                                     "--jump", "ACCEPT",
-                                     NULL);
+        ret = iptablesAddRemoveRule(ctx->forward_filter,
+                                    action,
+                                    "--destination", networkstr,
+                                    "--out-interface", iface,
+                                    "--match", "state",
+                                    "--state", "ESTABLISHED,RELATED",
+                                    "--jump", "ACCEPT",
+                                    NULL);
     }
+    VIR_FREE(networkstr);
+    return ret;
 }
 
 /**
@@ -439,7 +471,7 @@ iptablesForwardAllowRelatedIn(iptablesContext *ctx,
  */
 int
 iptablesAddForwardAllowRelatedIn(iptablesContext *ctx,
-                          const char *network,
+                          virSocketAddr *network,
                           const char *iface,
                           const char *physdev)
 {
@@ -461,7 +493,7 @@ iptablesAddForwardAllowRelatedIn(iptablesContext *ctx,
  */
 int
 iptablesRemoveForwardAllowRelatedIn(iptablesContext *ctx,
-                             const char *network,
+                             virSocketAddr *network,
                              const char *iface,
                              const char *physdev)
 {
@@ -472,27 +504,41 @@ iptablesRemoveForwardAllowRelatedIn(iptablesContext *ctx,
  */
 static int
 iptablesForwardAllowIn(iptablesContext *ctx,
-                       const char *network,
+                       virSocketAddr *network,
                        const char *iface,
                        const char *physdev,
                        int action)
 {
+    int ret;
+    char *networkstr;
+
+    if (!VIR_SOCKET_IS_FAMILY(network, AF_INET)) {
+        iptablesError(VIR_ERR_CONFIG_UNSUPPORTED,
+                      _("Only IPv4 addresses can be used with iptables"));
+        return -1;
+    }
+
+    if (!(networkstr = virSocketFormatAddr(network)))
+        return -1;
+
     if (physdev && physdev[0]) {
-        return iptablesAddRemoveRule(ctx->forward_filter,
-                                     action,
-                                     "--destination", network,
-                                     "--in-interface", physdev,
-                                     "--out-interface", iface,
-                                     "--jump", "ACCEPT",
-                                     NULL);
+        ret = iptablesAddRemoveRule(ctx->forward_filter,
+                                    action,
+                                    "--destination", networkstr,
+                                    "--in-interface", physdev,
+                                    "--out-interface", iface,
+                                    "--jump", "ACCEPT",
+                                    NULL);
     } else {
-        return iptablesAddRemoveRule(ctx->forward_filter,
-                                     action,
-                                     "--destination", network,
-                                     "--out-interface", iface,
-                                     "--jump", "ACCEPT",
-                                     NULL);
+        ret = iptablesAddRemoveRule(ctx->forward_filter,
+                                    action,
+                                    "--destination", networkstr,
+                                    "--out-interface", iface,
+                                    "--jump", "ACCEPT",
+                                    NULL);
     }
+    VIR_FREE(networkstr);
+    return ret;
 }
 
 /**
@@ -510,7 +556,7 @@ iptablesForwardAllowIn(iptablesContext *ctx,
  */
 int
 iptablesAddForwardAllowIn(iptablesContext *ctx,
-                          const char *network,
+                          virSocketAddr *network,
                           const char *iface,
                           const char *physdev)
 {
@@ -532,7 +578,7 @@ iptablesAddForwardAllowIn(iptablesContext *ctx,
  */
 int
 iptablesRemoveForwardAllowIn(iptablesContext *ctx,
-                             const char *network,
+                             virSocketAddr *network,
                              const char *iface,
                              const char *physdev)
 {
@@ -698,50 +744,64 @@ iptablesRemoveForwardRejectIn(iptablesContext *ctx,
  */
 static int
 iptablesForwardMasquerade(iptablesContext *ctx,
-                          const char *network,
+                          virSocketAddr *network,
                           const char *physdev,
                           const char *protocol,
                           int action)
 {
+    int ret;
+    char *networkstr;
+
+    if (!VIR_SOCKET_IS_FAMILY(network, AF_INET)) {
+        iptablesError(VIR_ERR_CONFIG_UNSUPPORTED,
+                      _("Only IPv4 addresses can be used with iptables"));
+        return -1;
+    }
+
+    if (!(networkstr = virSocketFormatAddr(network)))
+        return -1;
+
     if (protocol && protocol[0]) {
         if (physdev && physdev[0]) {
-            return iptablesAddRemoveRule(ctx->nat_postrouting,
-                                         action,
-                                         "--source", network,
-                                         "-p", protocol,
-                                         "!", "--destination", network,
-                                         "--out-interface", physdev,
-                                         "--jump", "MASQUERADE",
-                                         "--to-ports", "1024-65535",
-                                         NULL);
+            ret = iptablesAddRemoveRule(ctx->nat_postrouting,
+                                        action,
+                                        "--source", networkstr,
+                                        "-p", protocol,
+                                        "!", "--destination", networkstr,
+                                        "--out-interface", physdev,
+                                        "--jump", "MASQUERADE",
+                                        "--to-ports", "1024-65535",
+                                        NULL);
         } else {
-            return iptablesAddRemoveRule(ctx->nat_postrouting,
-                                         action,
-                                         "--source", network,
-                                         "-p", protocol,
-                                         "!", "--destination", network,
-                                         "--jump", "MASQUERADE",
-                                         "--to-ports", "1024-65535",
-                                         NULL);
+            ret = iptablesAddRemoveRule(ctx->nat_postrouting,
+                                        action,
+                                        "--source", networkstr,
+                                        "-p", protocol,
+                                        "!", "--destination", networkstr,
+                                        "--jump", "MASQUERADE",
+                                        "--to-ports", "1024-65535",
+                                        NULL);
         }
     } else {
         if (physdev && physdev[0]) {
-            return iptablesAddRemoveRule(ctx->nat_postrouting,
-                                         action,
-                                         "--source", network,
-                                         "!", "--destination", network,
-                                         "--out-interface", physdev,
-                                         "--jump", "MASQUERADE",
-                                         NULL);
+            ret = iptablesAddRemoveRule(ctx->nat_postrouting,
+                                        action,
+                                        "--source", networkstr,
+                                        "!", "--destination", networkstr,
+                                        "--out-interface", physdev,
+                                        "--jump", "MASQUERADE",
+                                        NULL);
         } else {
-            return iptablesAddRemoveRule(ctx->nat_postrouting,
-                                         action,
-                                         "--source", network,
-                                         "!", "--destination", network,
-                                         "--jump", "MASQUERADE",
-                                         NULL);
+            ret = iptablesAddRemoveRule(ctx->nat_postrouting,
+                                        action,
+                                        "--source", networkstr,
+                                        "!", "--destination", networkstr,
+                                        "--jump", "MASQUERADE",
+                                        NULL);
         }
     }
+    VIR_FREE(networkstr);
+    return ret;
 }
 
 /**
@@ -759,7 +819,7 @@ iptablesForwardMasquerade(iptablesContext *ctx,
  */
 int
 iptablesAddForwardMasquerade(iptablesContext *ctx,
-                             const char *network,
+                             virSocketAddr *network,
                              const char *physdev,
                              const char *protocol)
 {
@@ -781,7 +841,7 @@ iptablesAddForwardMasquerade(iptablesContext *ctx,
  */
 int
 iptablesRemoveForwardMasquerade(iptablesContext *ctx,
-                                const char *network,
+                                virSocketAddr *network,
                                 const char *physdev,
                                 const char *protocol)
 {
diff --git a/src/util/iptables.h b/src/util/iptables.h
index 21ba667..fd49685 100644
--- a/src/util/iptables.h
+++ b/src/util/iptables.h
@@ -22,6 +22,8 @@
 #ifndef __QEMUD_IPTABLES_H__
 # define __QEMUD_IPTABLES_H__
 
+# include "network.h"
+
 typedef struct _iptablesContext iptablesContext;
 
 iptablesContext *iptablesContextNew              (void);
@@ -42,29 +44,29 @@ int              iptablesRemoveUdpInput          (iptablesContext *ctx,
                                                   int port);
 
 int              iptablesAddForwardAllowOut      (iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *iface,
                                                   const char *physdev);
 int              iptablesRemoveForwardAllowOut   (iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *iface,
                                                   const char *physdev);
 
 int              iptablesAddForwardAllowRelatedIn(iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *iface,
                                                   const char *physdev);
 int              iptablesRemoveForwardAllowRelatedIn(iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *iface,
                                                   const char *physdev);
 
 int              iptablesAddForwardAllowIn       (iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *iface,
                                                   const char *physdev);
 int              iptablesRemoveForwardAllowIn    (iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *iface,
                                                   const char *physdev);
 
@@ -84,11 +86,11 @@ int              iptablesRemoveForwardRejectIn   (iptablesContext *ctx,
                                                   const char *iface);
 
 int              iptablesAddForwardMasquerade    (iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *physdev,
                                                   const char *protocol);
 int              iptablesRemoveForwardMasquerade (iptablesContext *ctx,
-                                                  const char *network,
+                                                  virSocketAddr *network,
                                                   const char *physdev,
                                                   const char *protocol);
 int              iptablesAddOutputFixUdpChecksum (iptablesContext *ctx,
diff --git a/src/util/network.h b/src/util/network.h
index 9f9a340..f25b813 100644
--- a/src/util/network.h
+++ b/src/util/network.h
@@ -34,6 +34,12 @@ typedef struct {
     socklen_t len;
 } virSocketAddr;
 
+#define VIR_SOCKET_HAS_ADDR(s)                  \
+    ((s)->data.sa.sa_family != AF_UNSPEC)
+
+#define VIR_SOCKET_IS_FAMILY(s, f)              \
+    ((s)->data.sa.sa_family == f)
+
 typedef virSocketAddr *virSocketAddrPtr;
 
 int virSocketParseAddr    (const char *val,
-- 
1.7.2.3


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