[libvirt] [libvirt-php][PATCH 1/8] libvirt_network_get_information: Be more tolerant to missing info

[Michal Privoznik]

This function is really build in a way that only NATed networks
can pass the function. Any other networks (and there's plenty of
them) will make it fail immediately. So while we are in PHP, we
can utilize array_key_exist() function and thus just fill just
those info that we know for now.

Signed-off-by: Michal Privoznik <mprivozn at redhat.com>
---
 src/libvirt-php.c | 96 ++++++++++++++++++++++++++-----------------------------
 1 file changed, 45 insertions(+), 51 deletions(-)

diff --git a/src/libvirt-php.c b/src/libvirt-php.c
index e85443f..a532525 100644
--- a/src/libvirt-php.c
+++ b/src/libvirt-php.c
@@ -8644,15 +8644,20 @@ PHP_FUNCTION(libvirt_network_get_information)
     zval *znetwork;
     int retval = 0;
     char *xml  = NULL;
-    char *tmp  = NULL;
-    char *tmp2 = NULL;
+    char *name = NULL;
+    char *ipaddr = NULL;
+    char *netmask = NULL;
+    char *mode = NULL;
+    char *dev = NULL;
+    char *dhcp_start = NULL;
+    char *dhcp_end = NULL;
     char fixedtemp[32] = { 0 };
 
     GET_NETWORK_FROM_ARGS("r",&znetwork);
 
     xml=virNetworkGetXMLDesc(network->network, 0);
 
-    if (xml==NULL) {
+    if (xml == NULL) {
         set_error_if_unset("Cannot get network XML" TSRMLS_CC);
         RETURN_FALSE;
     }
@@ -8660,8 +8665,8 @@ PHP_FUNCTION(libvirt_network_get_information)
     array_init(return_value);
 
     /* Get name */
-    tmp = get_string_from_xpath(xml, "//network/name", NULL, &retval);
-    if (tmp == NULL) {
+    name = get_string_from_xpath(xml, "//network/name", NULL, &retval);
+    if (name == NULL) {
         set_error("Invalid XPath node for network name" TSRMLS_CC);
         RETURN_FALSE;
     }
@@ -8671,63 +8676,52 @@ PHP_FUNCTION(libvirt_network_get_information)
         RETURN_FALSE;
     }
 
-    add_assoc_string_ex(return_value, "name", 5, tmp, 1);
+    add_assoc_string_ex(return_value, "name", 5, name, 1);
 
     /* Get gateway IP address */
-    tmp = get_string_from_xpath(xml, "//network/ip/@address", NULL, &retval);
-    if (tmp == NULL) {
-        set_error("Invalid XPath node for network gateway IP address" TSRMLS_CC);
-        RETURN_FALSE;
-    }
-
-    if (retval < 0) {
-        set_error("Cannot get XPath expression result for network gateway IP address" TSRMLS_CC);
-        RETURN_FALSE;
-    }
-
-    add_assoc_string_ex(return_value, "ip", 3, tmp, 1);
+    ipaddr = get_string_from_xpath(xml, "//network/ip/@address", NULL, &retval);
+    if (ipaddr && retval > 0)
+        add_assoc_string_ex(return_value, "ip", 3, ipaddr, 1);
 
     /* Get netmask */
-    tmp2 = get_string_from_xpath(xml, "//network/ip/@netmask", NULL, &retval);
-    if (tmp2 == NULL) {
-        set_error("Invalid XPath node for network mask" TSRMLS_CC);
-        RETURN_FALSE;
+    netmask = get_string_from_xpath(xml, "//network/ip/@netmask", NULL, &retval);
+    if (netmask && retval > 0) {
+        int subnet_bits = get_subnet_bits(netmask);
+        add_assoc_string_ex(return_value, "netmask", 8, netmask, 1);
+        add_assoc_long(return_value, "netmask_bits", (long) subnet_bits);
+
+        /* Format CIDR address representation */
+        ipaddr[strlen(ipaddr) - 1] = ipaddr[strlen(ipaddr) - 1] - 1;
+        snprintf(fixedtemp, sizeof(fixedtemp), "%s/%d", ipaddr, subnet_bits);
+        add_assoc_string_ex(return_value, "ip_range", 9, fixedtemp, 1);
     }
 
-    if (retval < 0) {
-        set_error("Cannot get XPath expression result for network mask" TSRMLS_CC);
-        RETURN_FALSE;
-    }
-
-    add_assoc_string_ex(return_value, "netmask", 8, tmp2, 1);
-    add_assoc_long(return_value, "netmask_bits", (long)get_subnet_bits(tmp2));
-
-    /* Format CIDR address representation */
-    tmp[strlen(tmp) - 1] = tmp[strlen(tmp) - 1] - 1;
-    snprintf(fixedtemp, sizeof(fixedtemp), "%s/%d", tmp, get_subnet_bits(tmp2));
-    add_assoc_string_ex(return_value, "ip_range", 9, fixedtemp, 1);
+    /* Get forwarding settings */
+    mode = get_string_from_xpath(xml, "//network/forward/@mode", NULL, &retval);
+    if (mode && retval > 0)
+        add_assoc_string_ex(return_value, "forwarding", 11, mode, 1);
 
     /* Get forwarding settings */
-    tmp = get_string_from_xpath(xml, "//network/forward/@mode", NULL, &retval);
-    if ((tmp == NULL) || (retval < 0))
-        add_assoc_string_ex(return_value, "forwarding", 11, "None", 1);
-    else
-        add_assoc_string_ex(return_value, "forwarding", 11, tmp, 1);
-
-    /* Get forwarding settings */
-    tmp = get_string_from_xpath(xml, "//network/forward/@dev", NULL, &retval);
-    if ((tmp == NULL) || (retval < 0))
-        add_assoc_string_ex(return_value, "forward_dev", 12, "any interface", 1);
-    else
-        add_assoc_string_ex(return_value, "forward_dev", 12, tmp, 1);
+    dev = get_string_from_xpath(xml, "//network/forward/@dev", NULL, &retval);
+    if (dev && retval > 0)
+        add_assoc_string_ex(return_value, "forward_dev", 12, dev, 1);
 
     /* Get DHCP values */
-    tmp = get_string_from_xpath(xml, "//network/ip/dhcp/range/@start", NULL, &retval);
-    tmp2 = get_string_from_xpath(xml, "//network/ip/dhcp/range/@end", NULL, &retval);
-    if ((retval > 0) && (tmp != NULL) && (tmp2 != NULL)) {
-        add_assoc_string_ex(return_value, "dhcp_start", 11, tmp,  1);
-        add_assoc_string_ex(return_value, "dhcp_end",    9, tmp2, 1);
+    dhcp_start = get_string_from_xpath(xml, "//network/ip/dhcp/range/@start", NULL, &retval);
+    dhcp_end = get_string_from_xpath(xml, "//network/ip/dhcp/range/@end", NULL, &retval);
+    if (dhcp_start && dhcp_end && retval > 0) {
+        add_assoc_string_ex(return_value, "dhcp_start", 11, dhcp_start,  1);
+        add_assoc_string_ex(return_value, "dhcp_end", 9, dhcp_end, 1);
     }
+
+    free(dhcp_end);
+    free(dhcp_start);
+    free(dev);
+    free(mode);
+    free(netmask);
+    free(ipaddr);
+    free(name);
+    free(xml);
 }
 
 /*
-- 
2.4.9