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[libvirt] [PATCHv2 3/3] v7.9: put dnsmasq parameters into conf-file



This patch changes how parameters are passed to dnsmasq.  Instead of
being on the command line, the parameters are put into a file (one
parameter per line) and a commandline --conf-file= specifies the
location of the file.  The file is located in the same directory as
the leases file.

This also adds the dnsmasq parameter interface=<net-name>

Putting the dnsmasq parameters into a configuration file
allows them to be examined and more easily understood than
examining the command lines displayed by "ps ax".  This is
especially true when a number of networks have been started.

I suspect that when the use of dnsmasq was originally done,
the command line was simple but has gotten more complicated
over time and will likely become even more complicated in the
future.

I believe that if use of dnsmasq was done today with
the current requirements for dnsmasq, a configuration file
would have been used.  Many (most?) daemons use configuration
files as oppose to large number of command line parameters.

One potential addition to dnsmasq parameters is to specify
the reverse-lookup queries which are not to be passed on up
the chain.  For IPv4, such queries are rather simple and
take the form:
    <ipv4_address>.in-addr.arpa
but ipv6 queries involve a lot longer specification.  The
IPv6 query will be of the form:
    <ipv6_address>.ip6.arpa
where the above query expands to a 44 character string which is
specified by --local=/<ipv6_address>.ip6.arpa/ which is
certainly a lot of clutter to add to the command line.
---
 src/network/bridge_driver.c                        | 190 +++++++++++++--------
 src/network/bridge_driver.h                        |   7 +-
 tests/networkxml2argvdata/dhcp6-nat-network.argv   |  29 ++--
 tests/networkxml2argvdata/dhcp6-network.argv       |  29 ++--
 .../dhcp6host-routed-network.argv                  |  25 ++-
 tests/networkxml2argvdata/isolated-network.argv    |  31 ++--
 .../networkxml2argvdata/nat-network-dns-hosts.argv |  19 +--
 .../nat-network-dns-srv-record-minimal.argv        |  37 ++--
 .../nat-network-dns-srv-record.argv                |  27 ++-
 .../nat-network-dns-txt-record.argv                |  26 +--
 tests/networkxml2argvdata/nat-network.argv         |  29 ++--
 tests/networkxml2argvdata/netboot-network.argv     |  37 ++--
 .../networkxml2argvdata/netboot-proxy-network.argv |  33 ++--
 tests/networkxml2argvdata/routed-network.argv      |  15 +-
 tests/networkxml2argvtest.c                        |  40 +----
 15 files changed, 286 insertions(+), 288 deletions(-)

diff --git a/src/network/bridge_driver.c b/src/network/bridge_driver.c
index 0128fba..a8f6d8e 100644
--- a/src/network/bridge_driver.c
+++ b/src/network/bridge_driver.c
@@ -142,6 +142,16 @@ networkDnsmasqLeaseFileNameFunc networkDnsmasqLeaseFileName =
     networkDnsmasqLeaseFileNameDefault;
 
 static char *
+networkDnsmasqConfigFileName(const char *netname)
+{
+    char *conffile;
+
+    ignore_value(virAsprintf(&conffile, DNSMASQ_STATE_DIR "/%s.conf",
+                             netname));
+    return conffile;
+}
+
+static char *
 networkRadvdPidfileBasename(const char *netname)
 {
     /* this is simple but we want to be sure it's consistently done */
@@ -168,6 +178,7 @@ networkRemoveInactive(struct network_driver *driver,
 {
     char *leasefile = NULL;
     char *radvdconfigfile = NULL;
+    char *configfile = NULL;
     char *radvdpidbase = NULL;
     dnsmasqContext *dctx = NULL;
     virNetworkDefPtr def = virNetworkObjGetPersistentDef(net);
@@ -187,9 +198,13 @@ networkRemoveInactive(struct network_driver *driver,
     if (!(radvdpidbase = networkRadvdPidfileBasename(def->name)))
         goto no_memory;
 
+    if (!(configfile = networkDnsmasqConfigFileName(def->name)))
+        goto no_memory;
+
     /* dnsmasq */
     dnsmasqDelete(dctx);
     unlink(leasefile);
+    unlink(configfile);
 
     /* radvd */
     unlink(radvdconfigfile);
@@ -202,6 +217,7 @@ networkRemoveInactive(struct network_driver *driver,
 
 cleanup:
     VIR_FREE(leasefile);
+    VIR_FREE(configfile);
     VIR_FREE(radvdconfigfile);
     VIR_FREE(radvdpidbase);
     dnsmasqContextFree(dctx);
@@ -635,12 +651,13 @@ networkBuildDnsmasqHostsList(dnsmasqContext *dctx,
 
 
 static int
-networkBuildDnsmasqArgv(virNetworkObjPtr network,
+networkDnsmasqConfContents(virNetworkObjPtr network,
                         const char *pidfile,
-                        virCommandPtr cmd,
+                        char **configstr,
                         dnsmasqContext *dctx,
                         dnsmasqCapsPtr caps ATTRIBUTE_UNUSED)
 {
+    virBuffer configbuf = VIR_BUFFER_INITIALIZER;
     int r, ret = -1;
     int nbleases = 0;
     int ii;
@@ -651,46 +668,43 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
     virNetworkIpDefPtr tmpipdef, ipdef, ipv4def, ipv6def;
     bool dhcp4flag, dhcp6flag, ipv6SLAAC;
 
+    *configstr = NULL;
+
     /*
-     * NB, be careful about syntax for dnsmasq options in long format.
-     *
-     * If the flag has a mandatory argument, it can be given using
-     * either syntax:
+     * All dnsmasq parameters are now put into a configuration
+     * file except, of course, the command line --conf-file=
+     * which specified the name and where the configuration
+     * file is located.
      *
-     *     --foo bar
-     *     --foo=bar
+     * Therefore, all parameters must now be specified as:
      *
-     * If the flag has a optional argument, it *must* be given using
-     * the syntax:
-     *
-     *     --foo=bar
-     *
-     * It is hard to determine whether a flag is optional or not,
-     * without reading the dnsmasq source :-( The manpage is not
-     * very explicit on this.
+     *     foo=bar
      */
 
     /*
      * Needed to ensure dnsmasq uses same algorithm for processing
      * multiple namedriver entries in /etc/resolv.conf as GLibC.
      */
-    virCommandAddArgList(cmd, "--strict-order",
-                              "--domain-needed",
-                              NULL);
 
-    if (network->def->domain) {
-        virCommandAddArgPair(cmd, "--domain", network->def->domain);
-        virCommandAddArg(cmd, "--expand-hosts");
-    }
-    /* need to specify local even if no domain specified */
-    virCommandAddArgFormat(cmd, "--local=/%s/",
-                           network->def->domain ? network->def->domain : "");
+    /* create dnsmasq config file appropriate for this network */
+    virBufferAddLit(&configbuf,
+                              "# dnsmasq conf file created by libvirt\n"
+                              "strict-order\n"
+                              "domain-needed\n");
 
-    if (pidfile)
-        virCommandAddArgPair(cmd, "--pid-file", pidfile);
-
-    /* *no* conf file */
-    virCommandAddArg(cmd, "--conf-file=");
+     if (network->def->domain) {
+        virBufferAsprintf(&configbuf,
+                 "domain=%s\n"
+                 "expand-hosts\n",
+                 network->def->domain);
+     }
+     /* need to specify local even if no domain specified */
+    virBufferAsprintf(&configbuf,
+                "local=/%s/\n",
+                network->def->domain ? network->def->domain : "");
+
+     if (pidfile)
+        virBufferAsprintf(&configbuf, "pid-file=%s\n", pidfile);
 
     if (dnsmasqCapsGet(caps, DNSMASQ_CAPS_BIND_DYNAMIC)) {
         /* using --bind-dynamic with only --interface (no
@@ -700,15 +714,14 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
          * other than one of the virtual guests connected directly to
          * this network). This was added in response to CVE 2012-3411.
          */
-        virCommandAddArgList(cmd,
-                             "--bind-dynamic",
-                             "--interface", network->def->bridge,
-                             NULL);
+        virBufferAsprintf(&configbuf,
+                             "bind-dynamic\n"
+                             "interface=%s\n",
+                             network->def->bridge);
     } else {
-        virCommandAddArgList(cmd,
-                             "--bind-interfaces",
-                             "--except-interface=lo",
-                             NULL);
+        virBufferAddLit(&configbuf,
+                             "bind-interfaces\n"
+                             "except-interface=lo\n");
         /*
          * --interface does not actually work with dnsmasq < 2.47,
          * due to DAD for ipv6 addresses on the interface.
@@ -725,7 +738,7 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
             if (!ipaddr)
                 goto cleanup;
             /* also part of CVE 2012-3411 - if the host's version of
-             * dnsmasq doesn't have --bind-dynamic, only allow listening on
+             * dnsmasq doesn't have bind-dynamic, only allow listening on
              * private/local IP addresses (see RFC1918/RFC3484/RFC4193)
              */
             if (!virSocketAddrIsPrivate(&tmpipdef->address)) {
@@ -734,7 +747,7 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
                 virReportError(VIR_ERR_CONFIG_UNSUPPORTED,
                                _("Publicly routable address %s is prohibited. "
                                  "The version of dnsmasq on this host (%d.%d) doesn't "
-                                 "support the --bind-dynamic option, which is required "
+                                 "support the bind-dynamic option, which is required "
                                  "for safe operation on a publicly routable subnet "
                                  "(see CVE-2012-3411). You must either upgrade dnsmasq, "
                                  "or use a private/local subnet range for this network "
@@ -742,21 +755,21 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
                                (int)version / 1000000, (int)(version % 1000000) / 1000);
                 goto cleanup;
             }
-            virCommandAddArgList(cmd, "--listen-address", ipaddr, NULL);
+            virBufferAsprintf(&configbuf, "listen-address=%s\n", ipaddr);
             VIR_FREE(ipaddr);
         }
     }
 
     /* If this is an isolated network, set the default route option
      * (3) to be empty to avoid setting a default route that's
-     * guaranteed to not work, and set --no-resolv so that no dns
+     * guaranteed to not work, and set no-resolv so that no dns
      * requests are forwarded on to the dns server listed in the
      * host's /etc/resolv.conf (since this could be used as a channel
      * to build a connection to the outside).
      */
     if (network->def->forwardType == VIR_NETWORK_FORWARD_NONE) {
-        virCommandAddArgList(cmd, "--dhcp-option=3",
-                             "--no-resolv", NULL);
+        virBufferAddLit(&configbuf, "dhcp-option=3\n"
+                                      "no-resolv\n");
     }
 
     if (network->def->dns != NULL) {
@@ -764,7 +777,7 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
         int i;
 
         for (i = 0; i < dns->ntxtrecords; i++) {
-            virCommandAddArgFormat(cmd, "--txt-record=%s,%s",
+            virBufferAsprintf(&configbuf, "txt-record=%s,%s\n",
                                    dns->txtrecords[i].name,
                                    dns->txtrecords[i].value);
         }
@@ -802,7 +815,7 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
                     goto cleanup;
                 }
 
-                virCommandAddArgPair(cmd, "--srv-host", record);
+                virBufferAsprintf(&configbuf, "srv-host=%s\n", record);
                 VIR_FREE(record);
                 VIR_FREE(recordPort);
                 VIR_FREE(recordWeight);
@@ -882,8 +895,8 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
                 virReportOOMError();
                 goto cleanup;
             }
-            virCommandAddArg(cmd, "--dhcp-range");
-            virCommandAddArgFormat(cmd, "%s,%s", saddr, eaddr);
+            virBufferAsprintf(&configbuf, "dhcp-range=%s,%s\n",
+                                        saddr, eaddr);
             VIR_FREE(saddr);
             VIR_FREE(eaddr);
             nbleases += virSocketAddrGetRange(&ipdef->ranges[r].start,
@@ -901,8 +914,7 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
                 virReportOOMError();
                 goto cleanup;
             }
-            virCommandAddArg(cmd, "--dhcp-range");
-            virCommandAddArgFormat(cmd, "%s,static", bridgeaddr);
+            virBufferAsprintf(&configbuf, "dhcp-range=%s,static\n", bridgeaddr);
             VIR_FREE(bridgeaddr);
         }
 
@@ -912,16 +924,14 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
         /* Note: the following is IPv4 only */
         if (VIR_SOCKET_ADDR_IS_FAMILY(&ipdef->address, AF_INET)) {
             if (ipdef->nranges || ipdef->nhosts)
-                virCommandAddArg(cmd, "--dhcp-no-override");
+                virBufferAddLit(&configbuf, "dhcp-no-override\n");
 
             if (ipdef->tftproot) {
-                virCommandAddArgList(cmd, "--enable-tftp",
-                                     "--tftp-root", ipdef->tftproot,
-                                     NULL);
+                virBufferAddLit(&configbuf, "enable-tftp\n");
+                virBufferAsprintf(&configbuf, "tftp-root=%s\n", ipdef->tftproot);
             }
 
             if (ipdef->bootfile) {
-                virCommandAddArg(cmd, "--dhcp-boot");
                 if (VIR_SOCKET_ADDR_VALID(&ipdef->bootserver)) {
                     char *bootserver = virSocketAddrFormat(&ipdef->bootserver);
 
@@ -929,11 +939,11 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
                         virReportOOMError();
                         goto cleanup;
                     }
-                    virCommandAddArgFormat(cmd, "%s%s%s",
+                    virBufferAsprintf(&configbuf, "dhcp-boot=%s%s%s\n",
                                        ipdef->bootfile, ",,", bootserver);
                     VIR_FREE(bootserver);
                 } else {
-                    virCommandAddArg(cmd, ipdef->bootfile);
+                    virBufferAsprintf(&configbuf, "dhcp-boot=%s\n", ipdef->bootfile);
                 }
             }
         }
@@ -949,9 +959,9 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
             virReportOOMError();
             goto cleanup;
         }
-        virCommandAddArgFormat(cmd, "--dhcp-leasefile=%s", leasefile);
+        virBufferAsprintf(&configbuf, "dhcp-leasefile=%s\n", leasefile);
         VIR_FREE(leasefile);
-        virCommandAddArgFormat(cmd, "--dhcp-lease-max=%d", nbleases);
+        virBufferAsprintf(&configbuf, "dhcp-lease-max=%d\n", nbleases);
     }
 
     /* this is done once per interface */
@@ -963,19 +973,19 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
      * file to allow for runtime additions.
      */
     if (dhcp4flag || dhcp6flag)
-        virCommandAddArgPair(cmd, "--dhcp-hostsfile",
-                             dctx->hostsfile->path);
+            virBufferAsprintf(&configbuf, "dhcp-hostsfile=%s\n",
+                                 dctx->hostsfile->path);
 
     /* Likewise, always create this file and put it on the commandline, to allow for
      * for runtime additions.
      */
-    virCommandAddArgPair(cmd, "--addn-hosts",
-                         dctx->addnhostsfile->path);
+    virBufferAsprintf(&configbuf, "addn-hosts=%s\n",
+                       dctx->addnhostsfile->path);
 
     /* Are we doing RA instead of radvd? */
     if (CHECK_VERSION_RA(caps)) {
         if (dhcp6flag)
-            virCommandAddArg(cmd, "--enable-ra");
+            virBufferAddLit(&configbuf, "enable-ra\n");
         else {
             for (ii = 0;
                 (ipdef = virNetworkDefGetIpByIndex(network->def, AF_INET6, ii));
@@ -983,8 +993,8 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
                 if (!(ipdef->nranges || ipdef->nhosts)) {
                     char *bridgeaddr = virSocketAddrFormat(&ipdef->address);
                     if (bridgeaddr) {
-                        virCommandAddArgFormat(cmd,
-                            "--dhcp-range=%s,ra-only", bridgeaddr);
+                        virBufferAsprintf(&configbuf,
+                            "dhcp-range=%s,ra-only\n", bridgeaddr);
                     } else {
                         virReportOOMError();
                         goto cleanup;
@@ -995,9 +1005,15 @@ networkBuildDnsmasqArgv(virNetworkObjPtr network,
         }
     }
 
+    if (!(*configstr = virBufferContentAndReset(&configbuf))) {
+        virReportOOMError();
+        goto cleanup;
+    }
+
     ret = 0;
 
 cleanup:
+    virBufferFreeAndReset(&configbuf);
     VIR_FREE(record);
     VIR_FREE(recordPort);
     VIR_FREE(recordWeight);
@@ -1005,13 +1021,17 @@ cleanup:
     return ret;
 }
 
+        /* build the dnsmasq command line */
 int
 networkBuildDhcpDaemonCommandLine(virNetworkObjPtr network, virCommandPtr *cmdout,
                                   char *pidfile, dnsmasqContext *dctx,
-                                  dnsmasqCapsPtr caps)
+                                  dnsmasqCapsPtr caps,
+                                  int testOnly, char **testConfigStr)
 {
     virCommandPtr cmd = NULL;
-    int ret = -1, ii;
+    int ret = -1;
+    char *configfile = NULL;
+    char *configstr = NULL;
 
     network->dnsmasqPid = -1;
 
@@ -1024,11 +1044,33 @@ networkBuildDhcpDaemonCommandLine(virNetworkObjPtr network, virCommandPtr *cmdou
     if (!virNetworkDefGetIpByIndex(network->def, AF_UNSPEC, 0))
         return 0;
 
-    cmd = virCommandNew(dnsmasqCapsGetBinaryPath(caps));
-    if (networkBuildDnsmasqArgv(network, pidfile, cmd, dctx, caps) < 0) {
+    if (networkDnsmasqConfContents(network, pidfile, &configstr, dctx, caps) < 0)
+        goto cleanup;
+    if (!configstr)
         goto cleanup;
+
+    if (testOnly) {
+        *testConfigStr = configstr;
+        return 0;
     }
 
+    /* construct the filename */
+    if (!(configfile = networkDnsmasqConfigFileName(network->def->name))) {
+        virReportOOMError();
+        goto cleanup;
+    }
+
+    /* Write the file */
+    if (virFileWriteStr(configfile, configstr, 0600) < 0) {
+        virReportSystemError(errno,
+                         _("couldn't write dnsmasq config file '%s'"),
+                         configfile);
+        goto cleanup;
+    }
+
+    cmd = virCommandNew(dnsmasqCapsGetBinaryPath(caps));
+    virCommandAddArgFormat(cmd, "--conf-file=%s", configfile);
+
     if (cmdout)
         *cmdout = cmd;
     ret = 0;
@@ -1044,6 +1086,7 @@ networkStartDhcpDaemon(struct network_driver *driver,
 {
     virCommandPtr cmd = NULL;
     char *pidfile = NULL;
+    char *testconfigstr = NULL;
     int ret = -1;
     dnsmasqContext *dctx = NULL;
 
@@ -1084,8 +1127,9 @@ networkStartDhcpDaemon(struct network_driver *driver,
 
     dnsmasqCapsRefresh(&driver->dnsmasqCaps, false);
 
-    ret = networkBuildDhcpDaemonCommandLine(network, &cmd, pidfile,
-                                            dctx, driver->dnsmasqCaps);
+    ret = networkBuildDhcpDaemonCommandLine(network, &cmd, pidfile, dctx,
+                                             driver->dnsmasqCaps,
+                                             0, &testconfigstr);
     if (ret < 0)
         goto cleanup;
 
diff --git a/src/network/bridge_driver.h b/src/network/bridge_driver.h
index 8c16bdd..f727f6a 100644
--- a/src/network/bridge_driver.h
+++ b/src/network/bridge_driver.h
@@ -49,15 +49,16 @@ int networkGetNetworkAddress(const char *netname, char **netaddr)
 int networkBuildDhcpDaemonCommandLine(virNetworkObjPtr network,
                                       virCommandPtr *cmdout, char *pidfile,
                                       dnsmasqContext *dctx,
-                                      dnsmasqCapsPtr caps)
-    ;
+                                      dnsmasqCapsPtr caps,
+                                      int testOnly, char **testConfigStr);
 # else
 /* Define no-op replacements that don't drag in any link dependencies.  */
 #  define networkAllocateActualDevice(iface) 0
 #  define networkNotifyActualDevice(iface) (iface=iface, 0)
 #  define networkReleaseActualDevice(iface) (iface=iface, 0)
 #  define networkGetNetworkAddress(netname, netaddr) (-2)
-#  define networkBuildDhcpDaemonCommandLine(network, cmdout, pidfile, dctx, caps) 0
+#  define networkBuildDhcpDaemonCommandLine(network, cmdout, pidfile, \
+                    dctx, caps, testonly, testConfigStr) 0
 # endif
 
 typedef char *(*networkDnsmasqLeaseFileNameFunc)(const char *netname);
diff --git a/tests/networkxml2argvdata/dhcp6-nat-network.argv b/tests/networkxml2argvdata/dhcp6-nat-network.argv
index df8c507..bdb64d6 100644
--- a/tests/networkxml2argvdata/dhcp6-nat-network.argv
+++ b/tests/networkxml2argvdata/dhcp6-nat-network.argv
@@ -1,15 +1,14 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-dynamic \
---interface virbr0 \
---dhcp-range 192.168.122.2,192.168.122.254 \
---dhcp-no-override \
---dhcp-range 2001:db8:ac10:fd01::1:10,2001:db8:ac10:fd01::1:ff \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \
---dhcp-lease-max=493 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts \
---enable-ra\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-dynamic
+interface=virbr0
+dhcp-range=192.168.122.2,192.168.122.254
+dhcp-no-override
+dhcp-range=2001:db8:ac10:fd01::1:10,2001:db8:ac10:fd01::1:ff
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
+dhcp-lease-max=493
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
+enable-ra
diff --git a/tests/networkxml2argvdata/dhcp6-network.argv b/tests/networkxml2argvdata/dhcp6-network.argv
index 059c418..42c7b35 100644
--- a/tests/networkxml2argvdata/dhcp6-network.argv
+++ b/tests/networkxml2argvdata/dhcp6-network.argv
@@ -1,15 +1,14 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---domain=mynet \
---expand-hosts \
---local=/mynet/ \
---conf-file= \
---bind-dynamic \
---interface virbr0 \
---dhcp-range 2001:db8:ac10:fd01::1:10,2001:db8:ac10:fd01::1:ff \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \
---dhcp-lease-max=240 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts \
---enable-ra\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+domain=mynet
+expand-hosts
+local=/mynet/
+bind-dynamic
+interface=virbr0
+dhcp-range=2001:db8:ac10:fd01::1:10,2001:db8:ac10:fd01::1:ff
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
+dhcp-lease-max=240
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
+enable-ra
diff --git a/tests/networkxml2argvdata/dhcp6host-routed-network.argv b/tests/networkxml2argvdata/dhcp6host-routed-network.argv
index 8f6d7d3..9ee3c28 100644
--- a/tests/networkxml2argvdata/dhcp6host-routed-network.argv
+++ b/tests/networkxml2argvdata/dhcp6host-routed-network.argv
@@ -1,13 +1,12 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-dynamic \
---interface virbr1 \
---dhcp-range 192.168.122.1,static \
---dhcp-no-override \
---dhcp-range 2001:db8:ac10:fd01::1,static \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/local.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/local.addnhosts \
---enable-ra\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-dynamic
+interface=virbr1
+dhcp-range=192.168.122.1,static
+dhcp-no-override
+dhcp-range=2001:db8:ac10:fd01::1,static
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/local.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/local.addnhosts
+enable-ra
diff --git a/tests/networkxml2argvdata/isolated-network.argv b/tests/networkxml2argvdata/isolated-network.argv
index b0783bd..740e423 100644
--- a/tests/networkxml2argvdata/isolated-network.argv
+++ b/tests/networkxml2argvdata/isolated-network.argv
@@ -1,16 +1,15 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-interfaces \
---except-interface=lo \
---listen-address 192.168.152.1 \
---dhcp-option=3 \
---no-resolv \
---dhcp-range 192.168.152.2,192.168.152.254 \
---dhcp-no-override \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/private.leases \
---dhcp-lease-max=253 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/private.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/private.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-interfaces
+except-interface=lo
+listen-address=192.168.152.1
+dhcp-option=3
+no-resolv
+dhcp-range=192.168.152.2,192.168.152.254
+dhcp-no-override
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/private.leases
+dhcp-lease-max=253
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/private.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/private.addnhosts
diff --git a/tests/networkxml2argvdata/nat-network-dns-hosts.argv b/tests/networkxml2argvdata/nat-network-dns-hosts.argv
index fee137f..1a3df37 100644
--- a/tests/networkxml2argvdata/nat-network-dns-hosts.argv
+++ b/tests/networkxml2argvdata/nat-network-dns-hosts.argv
@@ -1,10 +1,9 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---domain=example.com \
---expand-hosts \
---local=/example.com/ \
---conf-file= \
---bind-dynamic \
---interface virbr0 \
---addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+domain=example.com
+expand-hosts
+local=/example.com/
+bind-dynamic
+interface=virbr0
+addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
diff --git a/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv b/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv
index 1de6637..67600f4 100644
--- a/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv
+++ b/tests/networkxml2argvdata/nat-network-dns-srv-record-minimal.argv
@@ -1,19 +1,18 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-interfaces \
---except-interface=lo \
---listen-address 192.168.122.1 \
---listen-address 192.168.123.1 \
---listen-address fc00:db8:ac10:fe01::1 \
---listen-address fc00:db8:ac10:fd01::1 \
---listen-address 10.24.10.1 \
---srv-host=name.tcp.,,,, \
---dhcp-range 192.168.122.2,192.168.122.254 \
---dhcp-no-override \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \
---dhcp-lease-max=253 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-interfaces
+except-interface=lo
+listen-address=192.168.122.1
+listen-address=192.168.123.1
+listen-address=fc00:db8:ac10:fe01::1
+listen-address=fc00:db8:ac10:fd01::1
+listen-address=10.24.10.1
+srv-host=name.tcp.,,,,
+dhcp-range=192.168.122.2,192.168.122.254
+dhcp-no-override
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
+dhcp-lease-max=253
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
diff --git a/tests/networkxml2argvdata/nat-network-dns-srv-record.argv b/tests/networkxml2argvdata/nat-network-dns-srv-record.argv
index e7ecaa5..c03e6d9 100644
--- a/tests/networkxml2argvdata/nat-network-dns-srv-record.argv
+++ b/tests/networkxml2argvdata/nat-network-dns-srv-record.argv
@@ -1,14 +1,13 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-dynamic \
---interface virbr0 \
---srv-host=name.tcp.test-domain-name,.,1024,10,10 \
---dhcp-range 192.168.122.2,192.168.122.254 \
---dhcp-no-override \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \
---dhcp-lease-max=253 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-dynamic
+interface=virbr0
+srv-host=name.tcp.test-domain-name,.,1024,10,10
+dhcp-range=192.168.122.2,192.168.122.254
+dhcp-no-override
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
+dhcp-lease-max=253
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
diff --git a/tests/networkxml2argvdata/nat-network-dns-txt-record.argv b/tests/networkxml2argvdata/nat-network-dns-txt-record.argv
index 8ea0004..7dd9f3f 100644
--- a/tests/networkxml2argvdata/nat-network-dns-txt-record.argv
+++ b/tests/networkxml2argvdata/nat-network-dns-txt-record.argv
@@ -1,13 +1,13 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-dynamic --interface virbr0 \
-'--txt-record=example,example value' \
---dhcp-range 192.168.122.2,192.168.122.254 \
---dhcp-no-override \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \
---dhcp-lease-max=253 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-dynamic
+interface=virbr0
+txt-record=example,example value
+dhcp-range=192.168.122.2,192.168.122.254
+dhcp-no-override
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
+dhcp-lease-max=253
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
diff --git a/tests/networkxml2argvdata/nat-network.argv b/tests/networkxml2argvdata/nat-network.argv
index 578a5ff..e71f54b 100644
--- a/tests/networkxml2argvdata/nat-network.argv
+++ b/tests/networkxml2argvdata/nat-network.argv
@@ -1,15 +1,14 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-dynamic \
---interface virbr0 \
---dhcp-range 192.168.122.2,192.168.122.254 \
---dhcp-no-override \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases \
---dhcp-lease-max=253 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts \
---dhcp-range=2001:db8:ac10:fe01::1,ra-only \
---dhcp-range=2001:db8:ac10:fd01::1,ra-only\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-dynamic
+interface=virbr0
+dhcp-range=192.168.122.2,192.168.122.254
+dhcp-no-override
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/default.leases
+dhcp-lease-max=253
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/default.addnhosts
+dhcp-range=2001:db8:ac10:fe01::1,ra-only
+dhcp-range=2001:db8:ac10:fd01::1,ra-only
diff --git a/tests/networkxml2argvdata/netboot-network.argv b/tests/networkxml2argvdata/netboot-network.argv
index c5b75a3..df8df31 100644
--- a/tests/networkxml2argvdata/netboot-network.argv
+++ b/tests/networkxml2argvdata/netboot-network.argv
@@ -1,19 +1,18 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---domain=example.com \
---expand-hosts \
---local=/example.com/ \
---conf-file= \
---bind-interfaces \
---except-interface=lo \
---listen-address 192.168.122.1 \
---dhcp-range 192.168.122.2,192.168.122.254 \
---dhcp-no-override \
---enable-tftp \
---tftp-root /var/lib/tftproot \
---dhcp-boot pxeboot.img \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/netboot.leases \
---dhcp-lease-max=253 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/netboot.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/netboot.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+domain=example.com
+expand-hosts
+local=/example.com/
+bind-interfaces
+except-interface=lo
+listen-address=192.168.122.1
+dhcp-range=192.168.122.2,192.168.122.254
+dhcp-no-override
+enable-tftp
+tftp-root=/var/lib/tftproot
+dhcp-boot=pxeboot.img
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/netboot.leases
+dhcp-lease-max=253
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/netboot.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/netboot.addnhosts
diff --git a/tests/networkxml2argvdata/netboot-proxy-network.argv b/tests/networkxml2argvdata/netboot-proxy-network.argv
index 16e1c85..a84d7a1 100644
--- a/tests/networkxml2argvdata/netboot-proxy-network.argv
+++ b/tests/networkxml2argvdata/netboot-proxy-network.argv
@@ -1,17 +1,16 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---domain=example.com \
---expand-hosts \
---local=/example.com/ \
---conf-file= \
---bind-interfaces \
---except-interface=lo \
---listen-address 192.168.122.1 \
---dhcp-range 192.168.122.2,192.168.122.254 \
---dhcp-no-override \
---dhcp-boot pxeboot.img,,10.20.30.40 \
---dhcp-leasefile=/var/lib/libvirt/dnsmasq/netboot.leases \
---dhcp-lease-max=253 \
---dhcp-hostsfile=/var/lib/libvirt/dnsmasq/netboot.hostsfile \
---addn-hosts=/var/lib/libvirt/dnsmasq/netboot.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+domain=example.com
+expand-hosts
+local=/example.com/
+bind-interfaces
+except-interface=lo
+listen-address=192.168.122.1
+dhcp-range=192.168.122.2,192.168.122.254
+dhcp-no-override
+dhcp-boot=pxeboot.img,,10.20.30.40
+dhcp-leasefile=/var/lib/libvirt/dnsmasq/netboot.leases
+dhcp-lease-max=253
+dhcp-hostsfile=/var/lib/libvirt/dnsmasq/netboot.hostsfile
+addn-hosts=/var/lib/libvirt/dnsmasq/netboot.addnhosts
diff --git a/tests/networkxml2argvdata/routed-network.argv b/tests/networkxml2argvdata/routed-network.argv
index b3fbf49..eaf4bd3 100644
--- a/tests/networkxml2argvdata/routed-network.argv
+++ b/tests/networkxml2argvdata/routed-network.argv
@@ -1,8 +1,7 @@
- DNSMASQ@ \
---strict-order \
---domain-needed \
---local=// \
---conf-file= \
---bind-dynamic \
---interface virbr1 \
---addn-hosts=/var/lib/libvirt/dnsmasq/local.addnhosts\
+# dnsmasq conf file created by libvirt
+strict-order
+domain-needed
+local=//
+bind-dynamic
+interface=virbr1
+addn-hosts=/var/lib/libvirt/dnsmasq/local.addnhosts
diff --git a/tests/networkxml2argvtest.c b/tests/networkxml2argvtest.c
index a020db9..cc6be1c 100644
--- a/tests/networkxml2argvtest.c
+++ b/tests/networkxml2argvtest.c
@@ -15,37 +15,6 @@
 #include "memory.h"
 #include "network/bridge_driver.h"
 
-/* Replace all occurrences of @token in @buf by @replacement and adjust size of
- * @buf accordingly. Returns 0 on success and -1 on out-of-memory errors. */
-static int replaceTokens(char **buf, const char *token, const char *replacement) {
-    size_t token_start, token_end;
-    size_t buf_len, rest_len;
-    const size_t token_len = strlen(token);
-    const size_t replacement_len = strlen(replacement);
-    const int diff = replacement_len - token_len;
-
-    buf_len = rest_len = strlen(*buf) + 1;
-    token_end = 0;
-    for (;;) {
-        char *match = strstr(*buf + token_end, token);
-        if (match == NULL)
-            break;
-        token_start = match - *buf;
-        rest_len -= token_start + token_len - token_end;
-        token_end = token_start + token_len;
-        buf_len += diff;
-        if (diff > 0)
-            if (VIR_REALLOC_N(*buf, buf_len) < 0)
-                return -1;
-        if (diff != 0)
-            memmove(*buf + token_end + diff, *buf + token_end, rest_len);
-        memcpy(*buf + token_start, replacement, replacement_len);
-        token_end += diff;
-    }
-    /* if diff < 0, we could shrink the buffer here... */
-    return 0;
-}
-
 static int
 testCompareXMLToArgvFiles(const char *inxml, const char *outargv, dnsmasqCapsPtr caps)
 {
@@ -65,9 +34,6 @@ testCompareXMLToArgvFiles(const char *inxml, const char *outargv, dnsmasqCapsPtr
     if (virtTestLoadFile(outargv, &outArgvData) < 0)
         goto fail;
 
-    if (replaceTokens(&outArgvData, "@DNSMASQ@", DNSMASQ))
-        goto fail;
-
     if (!(dev = virNetworkDefParseString(inXmlData)))
         goto fail;
 
@@ -80,10 +46,8 @@ testCompareXMLToArgvFiles(const char *inxml, const char *outargv, dnsmasqCapsPtr
     if (dctx == NULL)
         goto fail;
 
-    if (networkBuildDhcpDaemonCommandLine(obj, &cmd, pidfile, dctx, caps) < 0)
-        goto fail;
-
-    if (!(actual = virCommandToString(cmd)))
+    if (networkBuildDhcpDaemonCommandLine(obj, &cmd, pidfile,
+                        dctx, caps, 1, &actual) < 0)
         goto fail;
 
     if (STRNEQ(outArgvData, actual)) {
-- 
1.7.11.7


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