/* Add an IP address to the list of IP addresses an interface is
* known to use. This function feeds the per-interface cache that
* is used to instantiate filters with variable '$IP'.
*
* @ifname: The name of the (tap) interface
* @addr: An IPv4 address in dotted decimal format that the (tap)
* interface is known to use.
*
* This function returns 0 on success, -1 otherwise
*/
int
virNWFilterIPAddrMapAddIPAddr(const char *ifname, char *addr)
{
int ret = -1;
virNWFilterVarValuePtr val;
virMutexLock(&ipAddressMapLock);
val = virHashLookup(ipAddressMap->hashTable, ifname);
if (!val) {
val = virNWFilterVarValueCreateSimple(addr);
if (!val) {
virReportOOMError();
goto cleanup;
}
ret = virNWFilterHashTablePut(ipAddressMap, ifname, val, 1);
goto cleanup;
} else {
if (virNWFilterVarValueAddValue(val, addr) < 0)
goto cleanup;
}
ret = 0;
cleanup:
virMutexUnlock(&ipAddressMapLock);
return ret;
}
static int testSetOneParameter(virNWFilterHashTablePtr vars,
const char *name,
const char *value)
{
int ret = -1;
virNWFilterVarValuePtr val;
if ((val = virHashLookup(vars->hashTable, name)) == NULL) {
val = virNWFilterVarValueCreateSimpleCopyValue(value);
if (!val)
goto cleanup;
if (virNWFilterHashTablePut(vars, name, val) < 0) {
virNWFilterVarValueFree(val);
goto cleanup;
}
} else {
if (virNWFilterVarValueAddValueCopy(val, value) < 0)
goto cleanup;
}
ret = 0;
cleanup:
return ret;
}
static int
virNWFilterDetermineMissingVarsRec(virConnectPtr conn,
virNWFilterDefPtr filter,
virNWFilterHashTablePtr vars,
virNWFilterHashTablePtr missing_vars,
int useNewFilter,
virNWFilterDriverStatePtr driver)
{
virNWFilterObjPtr obj;
int rc = 0;
int i, j;
virNWFilterDefPtr next_filter;
for (i = 0; i < filter->nentries; i++) {
virNWFilterRuleDefPtr rule = filter->filterEntries[i]->rule;
virNWFilterIncludeDefPtr inc = filter->filterEntries[i]->include;
if (rule) {
/* check all variables of this rule */
for (j = 0; j < rule->nvars; j++) {
if (!virHashLookup(vars->hashTable, rule->vars[j])) {
virNWFilterHashTablePut(missing_vars, rule->vars[j],
strdup("1"), 1);
}
}
} else if (inc) {
VIR_DEBUG("Following filter %s\n", inc->filterref);
obj = virNWFilterObjFindByName(&driver->nwfilters, inc->filterref);
if (obj) {
if (obj->wantRemoved) {
virNWFilterReportError(VIR_ERR_NO_NWFILTER,
_("Filter '%s' is in use."),
inc->filterref);
rc = 1;
virNWFilterObjUnlock(obj);
break;
}
/* create a temporary hashmap for depth-first tree traversal */
virNWFilterHashTablePtr tmpvars =
virNWFilterCreateVarsFrom(inc->params,
vars);
if (!tmpvars) {
virReportOOMError();
rc = 1;
virNWFilterObjUnlock(obj);
break;
}
next_filter = obj->def;
switch (useNewFilter) {
case INSTANTIATE_FOLLOW_NEWFILTER:
if (obj->newDef) {
next_filter = obj->newDef;
}
break;
case INSTANTIATE_ALWAYS:
break;
}
rc = virNWFilterDetermineMissingVarsRec(conn,
next_filter,
tmpvars,
missing_vars,
useNewFilter,
driver);
virNWFilterHashTableFree(tmpvars);
virNWFilterObjUnlock(obj);
if (rc)
break;
} else {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR,
_("referenced filter '%s' is missing"),
inc->filterref);
rc = 1;
break;
}
}
}
return rc;
}