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0dffca8f95
libvirt/tests/nwfilterxml2firewalltest.c
Peter Krempa 0dffca8f95 virCommandSetDryRun: Rework resetting of the dry run data 
While virCommandSetDryRun is used in tests only, there were some cases
when error paths would not call the function with NULL arguments to
reset the dry run infrastructure.

Introduce virCommandDryRunToken type which must be allocated via
virCommandDryRunTokenNew and passed to virCommandSetDryRun.

This way we can use automatic variable cleaning to trigger the cleanup
of virCommandSetDryRun parameters and also the use of the token variable
ensures that all callers of virCommandSetDryRun clean up after
themselves and also that the token isn't left unused in the code.

Signed-off-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Pavel Hrdina <phrdina@redhat.com>
2021-04-12 15:55:10 +02:00

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/*
* nwfilterxml2firewalltest.c: Test iptables rule generation
*
* Copyright (C) 2014 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see
* <http://www.gnu.org/licenses/>.
*
*/
#include <config.h>
#if defined (__linux__)
# include "testutils.h"
# include "nwfilter/nwfilter_ebiptables_driver.h"
# include "virbuffer.h"
# define LIBVIRT_VIRFIREWALLPRIV_H_ALLOW
# include "virfirewallpriv.h"
# define LIBVIRT_VIRCOMMANDPRIV_H_ALLOW
# include "vircommandpriv.h"
# define VIR_FROM_THIS VIR_FROM_NONE
# ifdef __linux__
# define RULESTYPE "linux"
# else
# error "test case not ported to this platform"
# endif
typedef struct _virNWFilterInst virNWFilterInst;
typedef virNWFilterInst *virNWFilterInstPtr;
struct _virNWFilterInst {
virNWFilterDefPtr *filters;
size_t nfilters;
virNWFilterRuleInstPtr *rules;
size_t nrules;
};
/*
* Some sets of rules that will be common to all test files,
* so we don't bother including them in the test data files
* as that would just bloat them
*/
static const char *commonRules[] = {
/* Dropping ebtables rules */
"ebtables --concurrent -t nat -D PREROUTING -i vnet0 -j libvirt-J-vnet0\n"
"ebtables --concurrent -t nat -D POSTROUTING -o vnet0 -j libvirt-P-vnet0\n"
"ebtables --concurrent -t nat -L libvirt-J-vnet0\n"
"ebtables --concurrent -t nat -L libvirt-P-vnet0\n"
"ebtables --concurrent -t nat -F libvirt-J-vnet0\n"
"ebtables --concurrent -t nat -X libvirt-J-vnet0\n"
"ebtables --concurrent -t nat -F libvirt-P-vnet0\n"
"ebtables --concurrent -t nat -X libvirt-P-vnet0\n",
/* Creating ebtables chains */
"ebtables --concurrent -t nat -N libvirt-J-vnet0\n"
"ebtables --concurrent -t nat -N libvirt-P-vnet0\n",
/* Dropping iptables rules */
"iptables -w -D libvirt-out -m physdev --physdev-is-bridged --physdev-out vnet0 -g FP-vnet0\n"
"iptables -w -D libvirt-out -m physdev --physdev-out vnet0 -g FP-vnet0\n"
"iptables -w -D libvirt-in -m physdev --physdev-in vnet0 -g FJ-vnet0\n"
"iptables -w -D libvirt-host-in -m physdev --physdev-in vnet0 -g HJ-vnet0\n"
"iptables -w -F FP-vnet0\n"
"iptables -w -X FP-vnet0\n"
"iptables -w -F FJ-vnet0\n"
"iptables -w -X FJ-vnet0\n"
"iptables -w -F HJ-vnet0\n"
"iptables -w -X HJ-vnet0\n",
/* Creating iptables chains */
"iptables -w -N libvirt-in\n"
"iptables -w -N libvirt-out\n"
"iptables -w -N libvirt-in-post\n"
"iptables -w -N libvirt-host-in\n"
"iptables -w -D FORWARD -j libvirt-in\n"
"iptables -w -D FORWARD -j libvirt-out\n"
"iptables -w -D FORWARD -j libvirt-in-post\n"
"iptables -w -D INPUT -j libvirt-host-in\n"
"iptables -w -I FORWARD 1 -j libvirt-in\n"
"iptables -w -I FORWARD 2 -j libvirt-out\n"
"iptables -w -I FORWARD 3 -j libvirt-in-post\n"
"iptables -w -I INPUT 1 -j libvirt-host-in\n"
"iptables -w -N FP-vnet0\n"
"iptables -w -N FJ-vnet0\n"
"iptables -w -N HJ-vnet0\n"
"iptables -w -A libvirt-out -m physdev --physdev-is-bridged --physdev-out vnet0 -g FP-vnet0\n"
"iptables -w -A libvirt-in -m physdev --physdev-in vnet0 -g FJ-vnet0\n"
"iptables -w -A libvirt-host-in -m physdev --physdev-in vnet0 -g HJ-vnet0\n"
"iptables -w -D libvirt-in-post -m physdev --physdev-in vnet0 -j ACCEPT\n"
"iptables -w -A libvirt-in-post -m physdev --physdev-in vnet0 -j ACCEPT\n",
/* Dropping ip6tables rules */
"ip6tables -w -D libvirt-out -m physdev --physdev-is-bridged --physdev-out vnet0 -g FP-vnet0\n"
"ip6tables -w -D libvirt-out -m physdev --physdev-out vnet0 -g FP-vnet0\n"
"ip6tables -w -D libvirt-in -m physdev --physdev-in vnet0 -g FJ-vnet0\n"
"ip6tables -w -D libvirt-host-in -m physdev --physdev-in vnet0 -g HJ-vnet0\n"
"ip6tables -w -F FP-vnet0\n"
"ip6tables -w -X FP-vnet0\n"
"ip6tables -w -F FJ-vnet0\n"
"ip6tables -w -X FJ-vnet0\n"
"ip6tables -w -F HJ-vnet0\n"
"ip6tables -w -X HJ-vnet0\n",
/* Creating ip6tables chains */
"ip6tables -w -N libvirt-in\n"
"ip6tables -w -N libvirt-out\n"
"ip6tables -w -N libvirt-in-post\n"
"ip6tables -w -N libvirt-host-in\n"
"ip6tables -w -D FORWARD -j libvirt-in\n"
"ip6tables -w -D FORWARD -j libvirt-out\n"
"ip6tables -w -D FORWARD -j libvirt-in-post\n"
"ip6tables -w -D INPUT -j libvirt-host-in\n"
"ip6tables -w -I FORWARD 1 -j libvirt-in\n"
"ip6tables -w -I FORWARD 2 -j libvirt-out\n"
"ip6tables -w -I FORWARD 3 -j libvirt-in-post\n"
"ip6tables -w -I INPUT 1 -j libvirt-host-in\n"
"ip6tables -w -N FP-vnet0\n"
"ip6tables -w -N FJ-vnet0\n"
"ip6tables -w -N HJ-vnet0\n"
"ip6tables -w -A libvirt-out -m physdev --physdev-is-bridged --physdev-out vnet0 -g FP-vnet0\n"
"ip6tables -w -A libvirt-in -m physdev --physdev-in vnet0 -g FJ-vnet0\n"
"ip6tables -w -A libvirt-host-in -m physdev --physdev-in vnet0 -g HJ-vnet0\n"
"ip6tables -w -D libvirt-in-post -m physdev --physdev-in vnet0 -j ACCEPT\n"
"ip6tables -w -A libvirt-in-post -m physdev --physdev-in vnet0 -j ACCEPT\n",
/* Inserting ebtables rules */
"ebtables --concurrent -t nat -A PREROUTING -i vnet0 -j libvirt-J-vnet0\n"
"ebtables --concurrent -t nat -A POSTROUTING -o vnet0 -j libvirt-P-vnet0\n",
};
static GHashTable *
virNWFilterCreateVarsFrom(GHashTable *vars1,
GHashTable *vars2)
{
GHashTable *res = virHashNew(virNWFilterVarValueHashFree);
if (!res)
return NULL;
if (virNWFilterHashTablePutAll(vars1, res) < 0)
goto err_exit;
if (virNWFilterHashTablePutAll(vars2, res) < 0)
goto err_exit;
return res;
err_exit:
virHashFree(res);
return NULL;
}
static void
virNWFilterRuleInstFree(virNWFilterRuleInstPtr inst)
{
if (!inst)
return;
virHashFree(inst->vars);
g_free(inst);
}
static void
virNWFilterInstReset(virNWFilterInstPtr inst)
{
size_t i;
for (i = 0; i < inst->nfilters; i++)
virNWFilterDefFree(inst->filters[i]);
VIR_FREE(inst->filters);
inst->nfilters = 0;
for (i = 0; i < inst->nrules; i++)
virNWFilterRuleInstFree(inst->rules[i]);
VIR_FREE(inst->rules);
inst->nrules = 0;
}
static int
virNWFilterDefToInst(const char *xml,
GHashTable *vars,
virNWFilterInstPtr inst);
static int
virNWFilterRuleDefToRuleInst(virNWFilterDefPtr def,
virNWFilterRuleDefPtr rule,
GHashTable *vars,
virNWFilterInstPtr inst)
{
virNWFilterRuleInstPtr ruleinst;
int ret = -1;
ruleinst = g_new0(virNWFilterRuleInst, 1);
ruleinst->chainSuffix = def->chainsuffix;
ruleinst->chainPriority = def->chainPriority;
ruleinst->def = rule;
ruleinst->priority = rule->priority;
if (!(ruleinst->vars = virHashNew(virNWFilterVarValueHashFree)))
goto cleanup;
if (virNWFilterHashTablePutAll(vars, ruleinst->vars) < 0)
goto cleanup;
if (VIR_APPEND_ELEMENT(inst->rules,
inst->nrules,
ruleinst) < 0)
goto cleanup;
ruleinst = NULL;
ret = 0;
cleanup:
virNWFilterRuleInstFree(ruleinst);
return ret;
}
static int
virNWFilterIncludeDefToRuleInst(virNWFilterIncludeDefPtr inc,
GHashTable *vars,
virNWFilterInstPtr inst)
{
GHashTable *tmpvars = NULL;
int ret = -1;
char *xml;
xml = g_strdup_printf("%s/nwfilterxml2firewalldata/%s.xml", abs_srcdir,
inc->filterref);
/* create a temporary hashmap for depth-first tree traversal */
if (!(tmpvars = virNWFilterCreateVarsFrom(inc->params,
vars)))
goto cleanup;
if (virNWFilterDefToInst(xml,
tmpvars,
inst) < 0)
goto cleanup;
ret = 0;
cleanup:
if (ret < 0)
virNWFilterInstReset(inst);
virHashFree(tmpvars);
VIR_FREE(xml);
return ret;
}
static int
virNWFilterDefToInst(const char *xml,
GHashTable *vars,
virNWFilterInstPtr inst)
{
size_t i;
int ret = -1;
virNWFilterDefPtr def = virNWFilterDefParseFile(xml);
if (!def)
return -1;
if (VIR_APPEND_ELEMENT_COPY(inst->filters,
inst->nfilters,
def) < 0) {
virNWFilterDefFree(def);
goto cleanup;
}
for (i = 0; i < def->nentries; i++) {
if (def->filterEntries[i]->rule) {
if (virNWFilterRuleDefToRuleInst(def,
def->filterEntries[i]->rule,
vars,
inst) < 0)
goto cleanup;
} else if (def->filterEntries[i]->include) {
if (virNWFilterIncludeDefToRuleInst(def->filterEntries[i]->include,
vars,
inst) < 0)
goto cleanup;
}
}
ret = 0;
cleanup:
if (ret < 0)
virNWFilterInstReset(inst);
return ret;
}
static void testRemoveCommonRules(char *rules)
{
size_t i;
char *offset = rules;
for (i = 0; i < G_N_ELEMENTS(commonRules); i++) {
char *tmp = strstr(offset, commonRules[i]);
size_t len = strlen(commonRules[i]);
if (tmp) {
memmove(tmp, tmp + len, (strlen(tmp) + 1) - len);
offset = tmp;
}
}
}
static int testSetOneParameter(GHashTable *vars,
const char *name,
const char *value)
{
virNWFilterVarValuePtr val;
if ((val = virHashLookup(vars, name)) == NULL) {
val = virNWFilterVarValueCreateSimpleCopyValue(value);
if (!val)
return -1;
if (virHashUpdateEntry(vars, name, val) < 0) {
virNWFilterVarValueFree(val);
return -1;
}
} else {
if (virNWFilterVarValueAddValueCopy(val, value) < 0)
return -1;
}
return 0;
}
static int testSetDefaultParameters(GHashTable *vars)
{
if (testSetOneParameter(vars, "IPSETNAME", "tck_test") < 0 ||
testSetOneParameter(vars, "A", "1.1.1.1") ||
testSetOneParameter(vars, "A", "2.2.2.2") ||
testSetOneParameter(vars, "A", "3.3.3.3") ||
testSetOneParameter(vars, "A", "3.3.3.3") ||
testSetOneParameter(vars, "B", "80") ||
testSetOneParameter(vars, "B", "90") ||
testSetOneParameter(vars, "B", "80") ||
testSetOneParameter(vars, "B", "80") ||
testSetOneParameter(vars, "C", "1080") ||
testSetOneParameter(vars, "C", "1090") ||
testSetOneParameter(vars, "C", "1100") ||
testSetOneParameter(vars, "C", "1110"))
return -1;
return 0;
}
static int testCompareXMLToArgvFiles(const char *xml,
const char *cmdline)
{
char *actualargv = NULL;
g_auto(virBuffer) buf = VIR_BUFFER_INITIALIZER;
GHashTable *vars = virHashNew(virNWFilterVarValueHashFree);
virNWFilterInst inst;
int ret = -1;
g_autoptr(virCommandDryRunToken) dryRunToken = virCommandDryRunTokenNew();
memset(&inst, 0, sizeof(inst));
virCommandSetDryRun(dryRunToken, &buf, NULL, NULL);
if (!vars)
goto cleanup;
if (testSetDefaultParameters(vars) < 0)
goto cleanup;
if (virNWFilterDefToInst(xml,
vars,
&inst) < 0)
goto cleanup;
if (ebiptables_driver.applyNewRules("vnet0", inst.rules, inst.nrules) < 0)
goto cleanup;
actualargv = virBufferContentAndReset(&buf);
virTestClearCommandPath(actualargv);
testRemoveCommonRules(actualargv);
if (virTestCompareToFile(actualargv, cmdline) < 0)
goto cleanup;
ret = 0;
cleanup:
VIR_FREE(actualargv);
virNWFilterInstReset(&inst);
virHashFree(vars);
return ret;
}
struct testInfo {
const char *name;
};
static int
testCompareXMLToIPTablesHelper(const void *data)
{
int result = -1;
const struct testInfo *info = data;
char *xml = NULL;
char *args = NULL;
xml = g_strdup_printf("%s/nwfilterxml2firewalldata/%s.xml",
abs_srcdir, info->name);
args = g_strdup_printf("%s/nwfilterxml2firewalldata/%s-%s.args",
abs_srcdir, info->name, RULESTYPE);
result = testCompareXMLToArgvFiles(xml, args);
VIR_FREE(xml);
VIR_FREE(args);
return result;
}
static bool
hasNetfilterTools(void)
{
return virFileIsExecutable(IPTABLES_PATH) &&
virFileIsExecutable(IP6TABLES_PATH) &&
virFileIsExecutable(EBTABLES_PATH);
}
static int
mymain(void)
{
int ret = 0;
# define DO_TEST(name) \
do { \
static struct testInfo info = { \
name, \
}; \
if (virTestRun("NWFilter XML-2-firewall " name, \
testCompareXMLToIPTablesHelper, &info) < 0) \
ret = -1; \
} while (0)
if (virFirewallSetBackend(VIR_FIREWALL_BACKEND_DIRECT) < 0) {
if (!hasNetfilterTools()) {
fprintf(stderr, "iptables/ip6tables/ebtables tools not present");
return EXIT_AM_SKIP;
}
return EXIT_FAILURE;
}
DO_TEST("ah");
DO_TEST("ah-ipv6");
DO_TEST("all");
DO_TEST("all-ipv6");
DO_TEST("arp");
DO_TEST("comment");
DO_TEST("conntrack");
DO_TEST("esp");
DO_TEST("esp-ipv6");
DO_TEST("example-1");
DO_TEST("example-2");
DO_TEST("hex-data");
DO_TEST("icmp-direction2");
DO_TEST("icmp-direction3");
DO_TEST("icmp-direction");
DO_TEST("icmp");
DO_TEST("icmpv6");
DO_TEST("igmp");
DO_TEST("ip");
DO_TEST("ipset");
DO_TEST("ipt-no-macspoof");
DO_TEST("ipv6");
DO_TEST("iter1");
DO_TEST("iter2");
DO_TEST("iter3");
DO_TEST("mac");
DO_TEST("rarp");
DO_TEST("sctp");
DO_TEST("sctp-ipv6");
DO_TEST("stp");
DO_TEST("target2");
DO_TEST("target");
DO_TEST("tcp");
DO_TEST("tcp-ipv6");
DO_TEST("udp");
DO_TEST("udp-ipv6");
DO_TEST("udplite");
DO_TEST("udplite-ipv6");
DO_TEST("vlan");
return ret == 0 ? EXIT_SUCCESS : EXIT_FAILURE;
}
VIR_TEST_MAIN(mymain)
#else /* ! defined (__linux__) */
int main(void)
{
return EXIT_AM_SKIP;
}
#endif /* ! defined (__linux__) */
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