[libvirt] [PATCH v4 5/5] Network: Add support for DNS hosts definition to the network XML
Michal Novotny
minovotn at redhat.com
Mon Jun 13 16:55:06 UTC 2011
This commit introduces names definition for the DNS hosts file using
the following syntax:
<dns>
<host ip="192.168.1.1">
<name>alias1</name>
<name>alias2</name>
</host>
</dns>
Signed-off-by: Michal Novotny <minovotn at redhat.com>
---
docs/formatnetwork.html.in | 7 +++
docs/schemas/network.rng | 8 +++
src/conf/network_conf.c | 115 +++++++++++++++++++++++++++++++++++++++++++
src/conf/network_conf.h | 9 +++
src/network/bridge_driver.c | 24 ++++++---
tests/networkxml2argvtest.c | 1 +
tests/networkxml2xmltest.c | 1 +
7 files changed, 157 insertions(+), 8 deletions(-)
diff --git a/docs/formatnetwork.html.in b/docs/formatnetwork.html.in
index 95d9c1a..6f28d54 100644
--- a/docs/formatnetwork.html.in
+++ b/docs/formatnetwork.html.in
@@ -225,6 +225,13 @@
subelements of the <code>host</code> element.
<span class="since">Since 0.9.1</span>
</dd>
+ <dt><code>host</code></dt>
+ <dd>The <code>host</code> element is the definition of DNS hosts to be passed
+ to the DNS service. The IP address is identified by the <code>ip</code> attribute
+ and the names for the IP addresses are identified in the <code>hostname</code>
+ subelements of the <code>host</code> element.
+ <span class="since">Since 0.9.1</span>
+ </dd>
</dl>
<h2><a name="examples">Example configuration</a></h2>
diff --git a/docs/schemas/network.rng b/docs/schemas/network.rng
index 3780af5..d28a93d 100644
--- a/docs/schemas/network.rng
+++ b/docs/schemas/network.rng
@@ -97,6 +97,14 @@
<attribute name="value"><text/></attribute>
</element>
</zeroOrMore>
+ <zeroOrMore>
+ <element name="host">
+ <attribute name="ip"><ref name="ipv4-addr"/></attribute>
+ <oneOrMore>
+ <element name="hostname"><text/></element>
+ </oneOrMore>
+ </element>
+ </zeroOrMore>
</element>
</optional>
diff --git a/src/conf/network_conf.c b/src/conf/network_conf.c
index 133ac84..56ee1d0 100644
--- a/src/conf/network_conf.c
+++ b/src/conf/network_conf.c
@@ -435,6 +435,53 @@ virNetworkDHCPRangeDefParseXML(const char *networkName,
}
static int
+virNetworkDNSHostsDefParseXML(virNetworkDNSDefPtr def,
+ xmlNodePtr node,
+ virSocketAddr ip)
+{
+ xmlNodePtr cur;
+ int ret = -1;
+
+ if (def->hosts == NULL) {
+ if (VIR_ALLOC(def->hosts) < 0) {
+ virReportOOMError();
+ goto out;
+ }
+ def->nhosts = 0;
+ }
+
+ cur = node->children;
+ while (cur != NULL) {
+ if (cur->type == XML_ELEMENT_NODE &&
+ xmlStrEqual(cur->name, BAD_CAST "hostname")) {
+ if (cur->children != NULL) {
+ char *hostname;
+
+ hostname = strdup((char *)cur->children->content);
+
+ if (VIR_REALLOC_N(def->hosts, def->nhosts + 1) < 0) {
+ VIR_FREE(hostname);
+ ret = -1;
+ virReportOOMError();
+ goto out;
+ }
+
+ def->hosts[def->nhosts].name = hostname;
+ def->hosts[def->nhosts].ip = ip;
+ def->nhosts++;
+ }
+ }
+
+ cur = cur->next;
+ }
+
+ ret = 0;
+
+out:
+ return ret;
+}
+
+static int
virNetworkDNSDefParseXML(virNetworkDNSDefPtr *dnsdef,
xmlNodePtr node)
{
@@ -477,6 +524,27 @@ virNetworkDNSDefParseXML(virNetworkDNSDefPtr *dnsdef,
def->txtrecords[def->ntxtrecords].name = name;
def->txtrecords[def->ntxtrecords].value = value;
def->ntxtrecords++;
+ } else if (cur->type == XML_ELEMENT_NODE &&
+ xmlStrEqual(cur->name, BAD_CAST "host")) {
+ char *ip;
+ virSocketAddr inaddr;
+ memset(&inaddr, 0, sizeof(inaddr));
+
+ if (!(ip = virXMLPropString(cur, "ip"))) {
+ cur = cur->next;
+ continue;
+ }
+ if ((ip == NULL) ||
+ (virSocketParseAddr(ip, &inaddr, AF_UNSPEC) < 0)) {
+ virNetworkReportError(VIR_ERR_XML_DETAIL,
+ _("Missing IP address in DNS host definition"));
+ VIR_FREE(ip);
+ goto error;
+ }
+ VIR_FREE(ip);
+ ret = virNetworkDNSHostsDefParseXML(def, cur, inaddr);
+ if (ret < 0)
+ goto error;
}
cur = cur->next;
@@ -839,6 +907,53 @@ virNetworkDNSDefFormat(virBufferPtr buf,
def->txtrecords[i].value);
}
+ if (def->nhosts) {
+ int ii, j;
+ char **iplist = NULL;
+ int iplist_size = 0;
+ bool in_list;
+
+ if (VIR_ALLOC(iplist) < 0) {
+ virReportOOMError();
+ result = -1;
+ goto out;
+ }
+
+ for (ii = 0 ; ii < def->nhosts; ii++) {
+ char *ip = virSocketFormatAddr(&def->hosts[ii].ip);
+ in_list = false;
+
+ for (j = 0; j < iplist_size; j++)
+ if (STREQ(iplist[j], ip))
+ in_list = true;
+
+ if (!in_list) {
+ virBufferAsprintf(buf, " <host ip='%s'>\n", ip);
+
+ for (j = 0 ; j < def->nhosts; j++) {
+ char *thisip = virSocketFormatAddr(&def->hosts[j].ip);
+ if (STREQ(ip, thisip))
+ virBufferAsprintf(buf, " <hostname>%s</hostname>\n",
+ def->hosts[j].name);
+ }
+ virBufferAsprintf(buf, " </host>\n");
+
+ if (VIR_REALLOC_N(iplist, iplist_size + 1) < 0) {
+ virReportOOMError();
+ result = -1;
+ goto out;
+ }
+
+ iplist[iplist_size] = ip;
+ iplist_size++;
+ }
+ }
+
+ for (j = 0; j < iplist_size; j++)
+ VIR_FREE(iplist[j]);
+ VIR_FREE(iplist);
+ }
+
virBufferAddLit(buf, " </dns>\n");
out:
return result;
diff --git a/src/conf/network_conf.h b/src/conf/network_conf.h
index d0dac02..50b3713 100644
--- a/src/conf/network_conf.h
+++ b/src/conf/network_conf.h
@@ -64,9 +64,18 @@ struct _virNetworkDNSTxtRecordsDef {
char *value;
};
+struct virNetworkDNSHostsDef {
+ virSocketAddr ip;
+ char *name;
+} virNetworkDNSHostsDef;
+
+typedef struct virNetworkDNSHostsDef *virNetworkDNSHostsDefPtr;
+
struct virNetworkDNSDef {
unsigned int ntxtrecords;
+ unsigned int nhosts;
virNetworkDNSTxtRecordsDefPtr txtrecords;
+ virNetworkDNSHostsDefPtr hosts;
} virNetworkDNSDef;
typedef struct virNetworkDNSDef *virNetworkDNSDefPtr;
diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index 8f68f1c..90bbc1d 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -436,6 +436,7 @@ networkShutdown(void) {
static dnsmasqContext*
networkSaveDnsmasqHostsfile(virNetworkIpDefPtr ipdef,
+ virNetworkDNSDefPtr dnsdef,
char *name,
bool force)
{
@@ -448,13 +449,20 @@ networkSaveDnsmasqHostsfile(virNetworkIpDefPtr ipdef,
goto cleanup;
}
- if (! force && virFileExists(dctx->hostsfile->path))
- return 0;
+ if (!(! force && virFileExists(dctx->hostsfile->path))) {
+ for (i = 0; i < ipdef->nhosts; i++) {
+ virNetworkDHCPHostDefPtr host = &(ipdef->hosts[i]);
+ if ((host->mac) && VIR_SOCKET_HAS_ADDR(&host->ip))
+ dnsmasqAddDhcpHost(dctx, host->mac, &host->ip, host->name);
+ }
+ }
- for (i = 0; i < ipdef->nhosts; i++) {
- virNetworkDHCPHostDefPtr host = &(ipdef->hosts[i]);
- if ((host->mac) && VIR_SOCKET_HAS_ADDR(&host->ip))
- dnsmasqAddDhcpHost(dctx, host->mac, &host->ip, host->name);
+ if (dnsdef) {
+ for (i = 0; i < dnsdef->nhosts; i++) {
+ virNetworkDNSHostsDefPtr host = &(dnsdef->hosts[i]);
+ if (VIR_SOCKET_HAS_ADDR(&host->ip))
+ dnsmasqAddHost(dctx, &host->ip, host->name);
+ }
}
if (dnsmasqSave(dctx) < 0)
@@ -605,7 +613,7 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
if (ipdef->nranges || ipdef->nhosts)
virCommandAddArg(cmd, "--dhcp-no-override");
- if ((dctx = networkSaveDnsmasqHostsfile(ipdef, network->def->name, false))) {
+ if ((dctx = networkSaveDnsmasqHostsfile(ipdef, network->def->dns, network->def->name, false))) {
if (dctx->hostsfile->nhosts)
virCommandAddArgPair(cmd, "--dhcp-hostsfile",
dctx->hostsfile->path);
@@ -2241,7 +2249,7 @@ static virNetworkPtr networkDefine(virConnectPtr conn, const char *xml) {
}
}
if (ipv4def) {
- dnsmasqContext* dctx = networkSaveDnsmasqHostsfile(ipv4def, network->def->name, true);
+ dnsmasqContext* dctx = networkSaveDnsmasqHostsfile(ipv4def, network->def->dns, network->def->name, true);
if (dctx == NULL)
goto cleanup;
dnsmasqContextFree(dctx);
diff --git a/tests/networkxml2argvtest.c b/tests/networkxml2argvtest.c
index 5e7f455..78f61ca 100644
--- a/tests/networkxml2argvtest.c
+++ b/tests/networkxml2argvtest.c
@@ -92,6 +92,7 @@ mymain(void)
DO_TEST("netboot-network");
DO_TEST("netboot-proxy-network");
DO_TEST("nat-network-dns-txt-record");
+ DO_TEST("nat-network-dns-hosts");
return (ret==0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
diff --git a/tests/networkxml2xmltest.c b/tests/networkxml2xmltest.c
index 2cc8e56..065166d 100644
--- a/tests/networkxml2xmltest.c
+++ b/tests/networkxml2xmltest.c
@@ -87,6 +87,7 @@ mymain(void)
DO_TEST("netboot-network");
DO_TEST("netboot-proxy-network");
DO_TEST("nat-network-dns-txt-record");
+ DO_TEST("nat-network-dns-hosts");
return (ret==0 ? EXIT_SUCCESS : EXIT_FAILURE);
}
--
1.7.3.2
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