leaseshelper: split out virLeaseNew

For the actions ADD and OLD, split out creating the new lease object,
as well as getting the environment variables that do not affect
the parsing of command line arguments.

src/network/leaseshelper.c

@@ -285,10 +285,82 @@ virLeasePrintLeases(virJSONValuePtr leases_array_new,
     return ret;
 }
 
+static int
+virLeaseNew(virJSONValuePtr *lease_ret,
+            const char *mac,
+            const char *clientid,
+            const char *ip,
+            const char *hostname,
+            const char *iaid,
+            const char *server_duid)
+{
+    virJSONValuePtr lease_new = NULL;
+    const char *exptime_tmp = virGetEnvAllowSUID("DNSMASQ_LEASE_EXPIRES");
+    long long expirytime = 0;
+    char *exptime = NULL;
+    int ret = -1;
+
+    /* In case hostname is still unknown, use the last known one */
+    if (!hostname)
+        hostname = virGetEnvAllowSUID("DNSMASQ_OLD_HOSTNAME");
+
+    if (!mac) {
+        ret = 0;
+        goto cleanup;
+    }
+
+    if (exptime_tmp) {
+        if (VIR_STRDUP(exptime, exptime_tmp) < 0)
+            goto cleanup;
+
+        /* Removed extraneous trailing space in DNSMASQ_LEASE_EXPIRES
+         * (dnsmasq < 2.52) */
+        if (exptime[strlen(exptime) - 1] == ' ')
+            exptime[strlen(exptime) - 1] = '\0';
+    }
+
+    if (!exptime ||
+        virStrToLong_ll(exptime, NULL, 10, &expirytime) < 0) {
+        virReportError(VIR_ERR_INTERNAL_ERROR,
+                       _("Unable to convert lease expiry time to long long: %s"),
+                       NULLSTR(exptime));
+        goto cleanup;
+    }
+
+    /* Create new lease */
+    if (!(lease_new = virJSONValueNewObject())) {
+        virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
+                       _("failed to create json"));
+        goto cleanup;
+    }
+
+    if (iaid && virJSONValueObjectAppendString(lease_new, "iaid", iaid) < 0)
+        goto cleanup;
+    if (ip && virJSONValueObjectAppendString(lease_new, "ip-address", ip) < 0)
+        goto cleanup;
+    if (mac && virJSONValueObjectAppendString(lease_new, "mac-address", mac) < 0)
+        goto cleanup;
+    if (hostname && virJSONValueObjectAppendString(lease_new, "hostname", hostname) < 0)
+        goto cleanup;
+    if (clientid && virJSONValueObjectAppendString(lease_new, "client-id", clientid) < 0)
+        goto cleanup;
+    if (server_duid && virJSONValueObjectAppendString(lease_new, "server-duid", server_duid) < 0)
+        goto cleanup;
+    if (expirytime && virJSONValueObjectAppendNumberLong(lease_new, "expiry-time", expirytime) < 0)
+        goto cleanup;
+
+    ret = 0;
+    *lease_ret = lease_new;
+    lease_new = NULL;
+ cleanup:
+    VIR_FREE(exptime);
+    virJSONValueFree(lease_new);
+    return ret;
+}
+
 int
 main(int argc, char **argv)
 {
-    char *exptime = NULL;
     char *pid_file = NULL;
     char *custom_lease_file = NULL;
     const char *ip = NULL;
@@ -297,10 +369,8 @@ main(int argc, char **argv)
     const char *iaid = virGetEnvAllowSUID("DNSMASQ_IAID");
     const char *clientid = virGetEnvAllowSUID("DNSMASQ_CLIENT_ID");
     const char *interface = virGetEnvAllowSUID("DNSMASQ_INTERFACE");
-    const char *exptime_tmp = virGetEnvAllowSUID("DNSMASQ_LEASE_EXPIRES");
     const char *hostname = virGetEnvAllowSUID("DNSMASQ_SUPPLIED_HOSTNAME");
     char *server_duid = NULL;
-    long long expirytime = 0;
     int action = -1;
     int pid_file_fd = -1;
     int rv = EXIT_FAILURE;
@@ -362,20 +432,6 @@ main(int argc, char **argv)
     if (argc == 5)
         hostname = argv[4];
 
-    /* In case hostname is still unknown, use the last known one */
-    if (!hostname)
-        hostname = virGetEnvAllowSUID("DNSMASQ_OLD_HOSTNAME");
-
-    if (exptime_tmp) {
-        if (VIR_STRDUP(exptime, exptime_tmp) < 0)
-            goto cleanup;
-
-        /* Removed extraneous trailing space in DNSMASQ_LEASE_EXPIRES
-         * (dnsmasq < 2.52) */
-        if (exptime[strlen(exptime) - 1] == ' ')
-            exptime[strlen(exptime) - 1] = '\0';
-    }
-
     /* Check if it is an IPv6 lease */
     if (iaid) {
         mac = virGetEnvAllowSUID("DNSMASQ_MAC");
@@ -405,6 +461,9 @@ main(int argc, char **argv)
     switch ((enum virLeaseActionFlags) action) {
     case VIR_LEASE_ACTION_ADD:
     case VIR_LEASE_ACTION_OLD:
+        /* Create new lease */
+        if (virLeaseNew(&lease_new, mac, clientid, ip, hostname, server_duid, iaid) < 0)
+            goto cleanup;
         /* Custom ipv6 leases *will not* be created if the env-var DNSMASQ_MAC
          * is not set. In the special case, when the $(interface).status file
          * is not already present and dnsmasq is (re)started, the corresponding
@@ -418,40 +477,9 @@ main(int argc, char **argv)
          * the new lease will be created irrespective of whether the MACID is
          * known or not.
          */
-        if (!mac)
+        if (!lease_new)
             break;
 
-        /* Create new lease */
-        if (!(lease_new = virJSONValueNewObject())) {
-            virReportError(VIR_ERR_INTERNAL_ERROR, "%s",
-                           _("failed to create json"));
-            goto cleanup;
-        }
-
-        if (!exptime ||
-            virStrToLong_ll(exptime, NULL, 10, &expirytime) < 0) {
-            virReportError(VIR_ERR_INTERNAL_ERROR,
-                           _("Unable to convert lease expiry time to long long: %s"),
-                           NULLSTR(exptime));
-            goto cleanup;
-        }
-
-        if (iaid && virJSONValueObjectAppendString(lease_new, "iaid", iaid) < 0)
-            goto cleanup;
-        if (ip && virJSONValueObjectAppendString(lease_new, "ip-address", ip) < 0)
-            goto cleanup;
-        if (mac && virJSONValueObjectAppendString(lease_new, "mac-address", mac) < 0)
-            goto cleanup;
-        if (hostname && virJSONValueObjectAppendString(lease_new, "hostname", hostname) < 0)
-            goto cleanup;
-        if (clientid && virJSONValueObjectAppendString(lease_new, "client-id", clientid) < 0)
-            goto cleanup;
-        if (server_duid && virJSONValueObjectAppendString(lease_new, "server-duid", server_duid) < 0)
-            goto cleanup;
-        if (expirytime && virJSONValueObjectAppendNumberLong(lease_new, "expiry-time", expirytime) < 0)
-            goto cleanup;
-
-
         /* fallthrough */
     case VIR_LEASE_ACTION_DEL:
         /* Delete the corresponding lease, if it already exists */
@@ -514,7 +542,6 @@ main(int argc, char **argv)
         virPidFileReleasePath(pid_file, pid_file_fd);
 
     VIR_FREE(pid_file);
-    VIR_FREE(exptime);
     VIR_FREE(server_duid);
     VIR_FREE(custom_lease_file);
     virJSONValueFree(lease_new);