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nwfilter: use virFindFileInPath for needed CLI tools 

I am getting rid of determining the path to necessary CLI tools at
compile time. Instead, now the firewall driver has an initialization
function that uses virFindFileInPath() to determine the path to
necessary CLI tools and a shutdown function to free allocated memory.
The rest of the patch mostly deals with availability of the CLI tools
and to not call certain code blocks if a tool is not available and that
strings now have to be built slightly differently.
This commit is contained in:
Stefan Berger 2010-04-14 06:29:55 -04:00
parent 71057b1c58
commit 274f09cbc5
6 changed files with 337 additions and 169 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
configure.ac
View File

@ -295,24 +295,12 @@ if test x"$with_rhel5_api" = x"yes"; then
AC_DEFINE([WITH_RHEL5_API], [1], [whether building for the RHEL-5 API])
fi
AC_PATH_PROG([BASH_PATH], [bash], /bin/bash, [/bin:$PATH])
AC_DEFINE_UNQUOTED([BASH_PATH], "$BASH_PATH", [path to bash binary])
AC_PATH_PROG([IPTABLES_PATH], [iptables], /sbin/iptables, [/usr/sbin:$PATH])
AC_DEFINE_UNQUOTED([IPTABLES_PATH], "$IPTABLES_PATH", [path to iptables binary])
AC_PATH_PROG([IP6TABLES_PATH], [ip6tables], /sbin/ip6tables, [/usr/sbin:$PATH])
AC_DEFINE_UNQUOTED([IP6TABLES_PATH], "$IP6TABLES_PATH", [path to ip6tables binary])
AC_PATH_PROG([EBTABLES_PATH], [ebtables], /sbin/ebtables, [/usr/sbin:$PATH])
AC_DEFINE_UNQUOTED([EBTABLES_PATH], "$EBTABLES_PATH", [path to ebtables binary])
AC_PATH_PROG([GREP_PATH], [grep], /bin/grep, [/bin:$PATH])
AC_DEFINE_UNQUOTED([GREP_PATH], "$GREP_PATH", [path to grep binary])
AC_PATH_PROG([GAWK_PATH], [gawk], /bin/gawk, [/bin:$PATH])
AC_DEFINE_UNQUOTED([GAWK_PATH], "$GAWK_PATH", [path to gawk binary])
if test "$with_openvz" = "yes"; then
AC_DEFINE_UNQUOTED([WITH_OPENVZ], 1, [whether OpenVZ driver is enabled])

10
src/conf/nwfilter_conf.h
View File

@ -451,6 +451,9 @@ struct domUpdateCBStruct {
};
typedef int (*virNWFilterTechDrvInit)(void);
typedef void (*virNWFilterTechDrvShutdown)(void);
enum virDomainNetType;
typedef int (*virNWFilterRuleCreateInstance)(virConnectPtr conn,
@ -484,9 +487,16 @@ typedef int (*virNWFilterRuleFreeInstanceData)(void * _inst);
typedef int (*virNWFilterRuleDisplayInstanceData)(virConnectPtr conn,
void *_inst);
enum techDrvFlags {
TECHDRV_FLAG_INITIALIZED = (1 << 0),
};
struct _virNWFilterTechDriver {
const char *name;
enum techDrvFlags flags;
virNWFilterTechDrvInit init;
virNWFilterTechDrvShutdown shutdown;
virNWFilterRuleCreateInstance createRuleInstance;
virNWFilterRuleApplyNewRules applyNewRules;

3
src/nwfilter/nwfilter_driver.c
View File

@ -70,6 +70,8 @@ nwfilterDriverStartup(int privileged) {
if (virNWFilterLearnInit() < 0)
return -1;
virNWFilterTechDriversInit();
if (virNWFilterConfLayerInit(virNWFilterDomainFWUpdateCB) < 0)
goto conf_init_err;
@ -126,6 +128,7 @@ alloc_err_exit:
virNWFilterConfLayerShutdown();
conf_init_err:
virNWFilterTechDriversShutdown();
virNWFilterLearnShutdown();
return -1;

454
src/nwfilter/nwfilter_ebiptables_driver.c
View File

@ -62,12 +62,13 @@
: ""
#define EBTABLES_CMD EBTABLES_PATH
#define IPTABLES_CMD IPTABLES_PATH
#define IP6TABLES_CMD IP6TABLES_PATH
#define BASH_CMD BASH_PATH
#define GREP_CMD GREP_PATH
#define GAWK_CMD GAWK_PATH
static char *ebtables_cmd_path;
static char *iptables_cmd_path;
static char *ip6tables_cmd_path;
static char *bash_cmd_path;
static char *grep_cmd_path;
static char *gawk_cmd_path;
#define PRINT_ROOT_CHAIN(buf, prefix, ifname) \
snprintf(buf, sizeof(buf), "libvirt-%c-%s", prefix, ifname)
@ -97,6 +98,10 @@ static const char *m_physdev_out_str = "-m physdev " PHYSDEV_OUT;
#define MATCH_PHYSDEV_OUT m_physdev_out_str
static int ebiptablesDriverInit(void);
static void ebiptablesDriverShutdown(void);
static const char *supported_protocols[] = {
"ipv4",
"ipv6",
@ -367,11 +372,11 @@ static int iptablesLinkIPTablesBaseChain(const char *iptables_cmd,
{
virBufferVSprintf(buf,
"res=$(%s -L %s -n --line-number | "
GREP_CMD " \" %s \")\n"
"%s \" %s \")\n"
"if [ $? -ne 0 ]; then\n"
" %s -I %s %d -j %s\n"
"else\n"
" r=$(echo $res | " GAWK_CMD " '{print $1}')\n"
" r=$(echo $res | %s '{print $1}')\n"
" if [ \"${r}\" != \"%d\" ]; then\n"
" " CMD_DEF("%s -I %s %d -j %s") CMD_SEPARATOR
" " CMD_EXEC
@ -384,9 +389,10 @@ static int iptablesLinkIPTablesBaseChain(const char *iptables_cmd,
"fi\n",
iptables_cmd, syschain,
udchain,
grep_cmd_path, udchain,
iptables_cmd, syschain, pos, udchain,
gawk_cmd_path,
pos,
@ -1052,10 +1058,19 @@ _iptablesCreateRuleInstance(int directionIn,
char number[20];
virBuffer buf = VIR_BUFFER_INITIALIZER;
const char *target;
const char *iptables_cmd = (isIPv6) ? IP6TABLES_CMD : IPTABLES_CMD;
const char *iptables_cmd = (isIPv6) ? ip6tables_cmd_path
: iptables_cmd_path;
unsigned int bufUsed;
bool srcMacSkipped = false;
if (!iptables_cmd) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR,
_("cannot create rule since %s tool is "
"missing."),
isIPv6 ? "ip6tables" : "iptables");
goto err_exit;
}
PRINT_IPT_ROOT_CHAIN(chain, chainPrefix, ifname);
switch (rule->prtclType) {
@ -1518,6 +1533,13 @@ ebtablesCreateRuleInstance(char chainPrefix,
char chain[MAX_CHAINNAME_LENGTH];
virBuffer buf = VIR_BUFFER_INITIALIZER;
if (!ebtables_cmd_path) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("cannot create rule since ebtables tool is "
"missing."));
goto err_exit;
}
if (nwfilter->chainsuffix == VIR_NWFILTER_CHAINSUFFIX_ROOT)
PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
else
@ -1529,8 +1551,8 @@ ebtablesCreateRuleInstance(char chainPrefix,
case VIR_NWFILTER_RULE_PROTOCOL_MAC:
virBufferVSprintf(&buf,
CMD_DEF_PRE EBTABLES_CMD " -t %s -%%c %s %%s",
EBTABLES_DEFAULT_TABLE, chain);
CMD_DEF_PRE "%s -t %s -%%c %s %%s",
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain);
if (ebtablesHandleEthHdr(&buf,
@ -1554,8 +1576,8 @@ ebtablesCreateRuleInstance(char chainPrefix,
case VIR_NWFILTER_RULE_PROTOCOL_ARP:
virBufferVSprintf(&buf,
CMD_DEF_PRE EBTABLES_CMD " -t %s -%%c %s %%s",
EBTABLES_DEFAULT_TABLE, chain);
CMD_DEF_PRE "%s -t %s -%%c %s %%s",
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain);
if (ebtablesHandleEthHdr(&buf,
vars,
@ -1653,8 +1675,8 @@ ebtablesCreateRuleInstance(char chainPrefix,
case VIR_NWFILTER_RULE_PROTOCOL_IP:
virBufferVSprintf(&buf,
CMD_DEF_PRE EBTABLES_CMD " -t %s -%%c %s %%s",
EBTABLES_DEFAULT_TABLE, chain);
CMD_DEF_PRE "%s -t %s -%%c %s %%s",
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain);
if (ebtablesHandleEthHdr(&buf,
vars,
@ -1789,8 +1811,8 @@ ebtablesCreateRuleInstance(char chainPrefix,
case VIR_NWFILTER_RULE_PROTOCOL_IPV6:
virBufferVSprintf(&buf,
CMD_DEF_PRE EBTABLES_CMD " -t %s -%%c %s %%s",
EBTABLES_DEFAULT_TABLE, chain);
CMD_DEF_PRE "%s -t %s -%%c %s %%s",
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain);
if (ebtablesHandleEthHdr(&buf,
vars,
@ -1913,8 +1935,8 @@ ebtablesCreateRuleInstance(char chainPrefix,
case VIR_NWFILTER_RULE_PROTOCOL_NONE:
virBufferVSprintf(&buf,
CMD_DEF_PRE EBTABLES_CMD " -t %s -%%c %s %%s",
EBTABLES_DEFAULT_TABLE, chain);
CMD_DEF_PRE "%s -t %s -%%c %s %%s",
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain);
break;
default:
@ -2103,16 +2125,26 @@ ebiptablesWriteToTempFile(const char *string) {
char filename[] = "/tmp/virtdXXXXXX";
int len;
char *filnam;
const char header[] = "#!" BASH_CMD "\n";
virBuffer buf = VIR_BUFFER_INITIALIZER;
char *header;
size_t written;
virBufferVSprintf(&buf, "#!%s\n", bash_cmd_path);
if (virBufferError(&buf)) {
virBufferFreeAndReset(&buf);
virReportOOMError();
return NULL;
}
header = virBufferContentAndReset(&buf);
int fd = mkstemp(filename);
if (fd < 0) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR,
"%s",
_("cannot create temporary file"));
return NULL;
goto err_exit;
}
if (fchmod(fd, S_IXUSR| S_IRUSR | S_IWUSR) < 0) {
@ -2146,10 +2178,12 @@ ebiptablesWriteToTempFile(const char *string) {
goto err_exit;
}
VIR_FREE(header);
close(fd);
return filnam;
err_exit:
VIR_FREE(header);
close(fd);
unlink(filename);
return NULL;
@ -2227,10 +2261,10 @@ ebtablesCreateTmpRootChain(virBufferPtr buf,
PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
virBufferVSprintf(buf,
CMD_DEF(EBTABLES_CMD " -t %s -N %s") CMD_SEPARATOR
CMD_DEF("%s -t %s -N %s") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE, chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain,
CMD_STOPONERR(stopOnError));
return 0;
@ -2250,10 +2284,10 @@ ebtablesLinkTmpRootChain(virBufferPtr buf,
PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
virBufferVSprintf(buf,
CMD_DEF(EBTABLES_CMD " -t %s -A %s -%c %s -j %s") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -%c %s -j %s") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE,
(incoming) ? EBTABLES_CHAIN_INCOMING
: EBTABLES_CHAIN_OUTGOING,
iodev, ifname, chain,
@ -2281,10 +2315,10 @@ _ebtablesRemoveRootChain(virBufferPtr buf,
PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
virBufferVSprintf(buf,
EBTABLES_CMD " -t %s -F %s" CMD_SEPARATOR
EBTABLES_CMD " -t %s -X %s" CMD_SEPARATOR,
EBTABLES_DEFAULT_TABLE, chain,
EBTABLES_DEFAULT_TABLE, chain);
"%s -t %s -F %s" CMD_SEPARATOR
"%s -t %s -X %s" CMD_SEPARATOR,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain);
return 0;
}
@ -2326,8 +2360,8 @@ _ebtablesUnlinkRootChain(virBufferPtr buf,
PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
virBufferVSprintf(buf,
EBTABLES_CMD " -t %s -D %s -%c %s -j %s" CMD_SEPARATOR,
EBTABLES_DEFAULT_TABLE,
"%s -t %s -D %s -%c %s -j %s" CMD_SEPARATOR,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE,
(incoming) ? EBTABLES_CHAIN_INCOMING
: EBTABLES_CHAIN_OUTGOING,
iodev, ifname, chain);
@ -2367,20 +2401,19 @@ ebtablesCreateTmpSubChain(virBufferPtr buf,
PRINT_CHAIN(chain, chainPrefix, ifname, protocol);
virBufferVSprintf(buf,
CMD_DEF(EBTABLES_CMD " -t %s -N %s") CMD_SEPARATOR
CMD_DEF("%s -t %s -N %s") CMD_SEPARATOR
CMD_EXEC
"%s"
CMD_DEF(EBTABLES_CMD " -t %s -A %s -p %s -j %s") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -p %s -j %s") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE, chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain,
CMD_STOPONERR(stopOnError),
EBTABLES_DEFAULT_TABLE,
rootchain,
protocol, chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE,
rootchain, protocol, chain,
CMD_STOPONERR(stopOnError));
@ -2409,16 +2442,15 @@ _ebtablesRemoveSubChain(virBufferPtr buf,
PRINT_CHAIN(chain, chainPrefix, ifname, protocol);
virBufferVSprintf(buf,
EBTABLES_CMD " -t %s -D %s -p %s -j %s" CMD_SEPARATOR
EBTABLES_CMD " -t %s -F %s" CMD_SEPARATOR
EBTABLES_CMD " -t %s -X %s" CMD_SEPARATOR,
EBTABLES_DEFAULT_TABLE,
rootchain,
protocol, chain,
"%s -t %s -D %s -p %s -j %s" CMD_SEPARATOR
"%s -t %s -F %s" CMD_SEPARATOR
"%s -t %s -X %s" CMD_SEPARATOR,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE,
rootchain, protocol, chain,
EBTABLES_DEFAULT_TABLE, chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain,
EBTABLES_DEFAULT_TABLE, chain);
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain);
return 0;
}
@ -2497,10 +2529,8 @@ ebtablesRenameTmpSubChain(virBufferPtr buf,
}
virBufferVSprintf(buf,
EBTABLES_CMD " -t %s -E %s %s" CMD_SEPARATOR,
EBTABLES_DEFAULT_TABLE,
tmpchain,
chain);
"%s -t %s -E %s %s" CMD_SEPARATOR,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, tmpchain, chain);
return 0;
}
@ -2568,6 +2598,13 @@ ebtablesApplyBasicRules(const char *ifname,
char chainPrefix = CHAINPREFIX_HOST_IN_TEMP;
char macaddr_str[VIR_MAC_STRING_BUFLEN];
if (!ebtables_cmd_path) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("cannot create rules since ebtables tool is "
"missing."));
return 1;
}
virFormatMacAddr(macaddr, macaddr_str);
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
@ -2581,44 +2618,36 @@ ebtablesApplyBasicRules(const char *ifname,
PRINT_ROOT_CHAIN(chain, chainPrefix, ifname);
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s -s ! %s -j DROP") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -s ! %s -j DROP") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain,
macaddr_str,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE,
chain, macaddr_str,
CMD_STOPONERR(1));
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s -p IPv4 -j ACCEPT") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -p IPv4 -j ACCEPT") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain,
CMD_STOPONERR(1));
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s -p ARP -j ACCEPT") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -p ARP -j ACCEPT") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain,
CMD_STOPONERR(1));
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s -j DROP") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -j DROP") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain,
CMD_STOPONERR(1));
ebtablesLinkTmpRootChain(&buf, 1, ifname, 1);
@ -2665,6 +2694,13 @@ ebtablesApplyDHCPOnlyRules(const char *ifname,
char macaddr_str[VIR_MAC_STRING_BUFLEN];
char *srcIPParam = NULL;
if (!ebtables_cmd_path) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("cannot create rules since ebtables tool is "
"missing."));
return 1;
}
if (dhcpserver) {
virBufferVSprintf(&buf, " --ip-src %s", dhcpserver);
if (virBufferError(&buf))
@ -2688,8 +2724,7 @@ ebtablesApplyDHCPOnlyRules(const char *ifname,
PRINT_ROOT_CHAIN(chain_out, CHAINPREFIX_HOST_OUT_TEMP, ifname);
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s"
CMD_DEF("%s -t %s -A %s"
" -s %s -d Broadcast "
" -p ipv4 --ip-protocol udp"
" --ip-src 0.0.0.0 --ip-dst 255.255.255.255"
@ -2698,24 +2733,20 @@ ebtablesApplyDHCPOnlyRules(const char *ifname,
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain_in,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain_in,
macaddr_str,
CMD_STOPONERR(1));
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s -j DROP") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -j DROP") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain_in,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain_in,
CMD_STOPONERR(1));
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s"
CMD_DEF("%s -t %s -A %s"
" -d %s"
" -p ipv4 --ip-protocol udp"
" %s"
@ -2724,20 +2755,17 @@ ebtablesApplyDHCPOnlyRules(const char *ifname,
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain_out,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain_out,
macaddr_str,
srcIPParam != NULL ? srcIPParam : "",
CMD_STOPONERR(1));
virBufferVSprintf(&buf,
CMD_DEF(EBTABLES_CMD
" -t %s -A %s -j DROP") CMD_SEPARATOR
CMD_DEF("%s -t %s -A %s -j DROP") CMD_SEPARATOR
CMD_EXEC
"%s",
EBTABLES_DEFAULT_TABLE,
chain_out,
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE, chain_out,
CMD_STOPONERR(1));
ebtablesLinkTmpRootChain(&buf, 1, ifname, 1);
@ -2769,6 +2797,9 @@ ebtablesRemoveBasicRules(const char *ifname)
virBuffer buf = VIR_BUFFER_INITIALIZER;
int cli_status;
if (!ebtables_cmd_path)
return 0;
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
ebtablesUnlinkTmpRootChain(&buf, 0, ifname);
ebtablesRemoveTmpSubChains(&buf, ifname);
@ -2800,8 +2831,8 @@ ebiptablesApplyNewRules(virConnectPtr conn ATTRIBUTE_UNUSED,
ebiptablesRuleInstPtr *inst = (ebiptablesRuleInstPtr *)_inst;
int chains_in = 0, chains_out = 0;
virBuffer buf = VIR_BUFFER_INITIALIZER;
int haveIptables = 0;
int haveIp6tables = 0;
bool haveIptables = false;
bool haveIp6tables = false;
if (inst)
qsort(inst, nruleInstances, sizeof(inst[0]),
@ -2816,12 +2847,14 @@ ebiptablesApplyNewRules(virConnectPtr conn ATTRIBUTE_UNUSED,
}
}
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
ebtablesUnlinkTmpRootChain(&buf, 0, ifname);
ebtablesRemoveTmpSubChains(&buf, ifname);
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
ebiptablesExecCLI(&buf, &cli_status);
if (ebtables_cmd_path) {
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
ebtablesUnlinkTmpRootChain(&buf, 0, ifname);
ebtablesRemoveTmpSubChains(&buf, ifname);
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
ebiptablesExecCLI(&buf, &cli_status);
}
if (chains_in != 0)
ebtablesCreateTmpRootChain(&buf, 1, ifname, 1);
@ -2855,34 +2888,32 @@ ebiptablesApplyNewRules(virConnectPtr conn ATTRIBUTE_UNUSED,
'A', -1, 1);
break;
case RT_IPTABLES:
haveIptables = 1;
haveIptables = true;
break;
case RT_IP6TABLES:
haveIp6tables = 1;
haveIp6tables = true;
break;
}
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
goto tear_down_tmpebchains;
// FIXME: establishment of iptables user define table tree goes here
if (haveIptables) {
iptablesUnlinkTmpRootChains(IPTABLES_CMD, &buf, ifname);
iptablesRemoveTmpRootChains(IPTABLES_CMD, &buf, ifname);
iptablesUnlinkTmpRootChains(iptables_cmd_path, &buf, ifname);
iptablesRemoveTmpRootChains(iptables_cmd_path, &buf, ifname);
iptablesCreateBaseChains(IPTABLES_CMD, &buf);
iptablesCreateBaseChains(iptables_cmd_path, &buf);
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
goto tear_down_tmpebchains;
iptablesCreateTmpRootChains(IPTABLES_CMD, &buf, ifname);
iptablesCreateTmpRootChains(iptables_cmd_path, &buf, ifname);
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
goto tear_down_tmpiptchains;
iptablesLinkTmpRootChains(IPTABLES_CMD, &buf, ifname);
iptablesSetupVirtInPost(IPTABLES_CMD, &buf, ifname);
iptablesLinkTmpRootChains(iptables_cmd_path, &buf, ifname);
iptablesSetupVirtInPost(iptables_cmd_path, &buf, ifname);
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
goto tear_down_tmpiptchains;
@ -2898,21 +2929,21 @@ ebiptablesApplyNewRules(virConnectPtr conn ATTRIBUTE_UNUSED,
}
if (haveIp6tables) {
iptablesUnlinkTmpRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesRemoveTmpRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesUnlinkTmpRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesRemoveTmpRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesCreateBaseChains(IP6TABLES_CMD, &buf);
iptablesCreateBaseChains(ip6tables_cmd_path, &buf);
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
goto tear_down_tmpiptchains;
iptablesCreateTmpRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesCreateTmpRootChains(ip6tables_cmd_path, &buf, ifname);
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
goto tear_down_tmpip6tchains;
iptablesLinkTmpRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesSetupVirtInPost(IP6TABLES_CMD, &buf, ifname);
iptablesLinkTmpRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesSetupVirtInPost(ip6tables_cmd_path, &buf, ifname);
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status != 0)
goto tear_down_tmpip6tchains;
@ -2927,9 +2958,6 @@ ebiptablesApplyNewRules(virConnectPtr conn ATTRIBUTE_UNUSED,
goto tear_down_tmpip6tchains;
}
// END IPTABLES stuff
if (chains_in != 0)
ebtablesLinkTmpRootChain(&buf, 1, ifname, 1);
if (chains_out != 0)
@ -2941,25 +2969,29 @@ ebiptablesApplyNewRules(virConnectPtr conn ATTRIBUTE_UNUSED,
return 0;
tear_down_ebsubchains_and_unlink:
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
ebtablesUnlinkTmpRootChain(&buf, 0, ifname);
if (ebtables_cmd_path) {
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
ebtablesUnlinkTmpRootChain(&buf, 0, ifname);
}
tear_down_tmpip6tchains:
if (haveIp6tables) {
iptablesUnlinkTmpRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesRemoveTmpRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesUnlinkTmpRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesRemoveTmpRootChains(ip6tables_cmd_path, &buf, ifname);
}
tear_down_tmpiptchains:
if (haveIptables) {
iptablesUnlinkTmpRootChains(IPTABLES_CMD, &buf, ifname);
iptablesRemoveTmpRootChains(IPTABLES_CMD, &buf, ifname);
iptablesUnlinkTmpRootChains(iptables_cmd_path, &buf, ifname);
iptablesRemoveTmpRootChains(iptables_cmd_path, &buf, ifname);
}
tear_down_tmpebchains:
ebtablesRemoveTmpSubChains(&buf, ifname);
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
if (ebtables_cmd_path) {
ebtablesRemoveTmpSubChains(&buf, ifname);
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
}
ebiptablesExecCLI(&buf, &cli_status);
@ -2978,18 +3010,24 @@ ebiptablesTearNewRules(virConnectPtr conn ATTRIBUTE_UNUSED,
int cli_status;
virBuffer buf = VIR_BUFFER_INITIALIZER;
iptablesUnlinkTmpRootChains(IPTABLES_CMD, &buf, ifname);
iptablesRemoveTmpRootChains(IPTABLES_CMD, &buf, ifname);
if (iptables_cmd_path) {
iptablesUnlinkTmpRootChains(iptables_cmd_path, &buf, ifname);
iptablesRemoveTmpRootChains(iptables_cmd_path, &buf, ifname);
}
iptablesUnlinkTmpRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesRemoveTmpRootChains(IP6TABLES_CMD, &buf, ifname);
if (ip6tables_cmd_path) {
iptablesUnlinkTmpRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesRemoveTmpRootChains(ip6tables_cmd_path, &buf, ifname);
}
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
ebtablesUnlinkTmpRootChain(&buf, 0, ifname);
if (ebtables_cmd_path) {
ebtablesUnlinkTmpRootChain(&buf, 1, ifname);
ebtablesUnlinkTmpRootChain(&buf, 0, ifname);
ebtablesRemoveTmpSubChains(&buf, ifname);
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
ebtablesRemoveTmpSubChains(&buf, ifname);
ebtablesRemoveTmpRootChain(&buf, 1, ifname);
ebtablesRemoveTmpRootChain(&buf, 0, ifname);
}
ebiptablesExecCLI(&buf, &cli_status);
@ -3005,31 +3043,37 @@ ebiptablesTearOldRules(virConnectPtr conn ATTRIBUTE_UNUSED,
virBuffer buf = VIR_BUFFER_INITIALIZER;
// switch to new iptables user defined chains
iptablesUnlinkRootChains(IPTABLES_CMD, &buf, ifname);
iptablesRemoveRootChains(IPTABLES_CMD, &buf, ifname);
if (iptables_cmd_path) {
iptablesUnlinkRootChains(iptables_cmd_path, &buf, ifname);
iptablesRemoveRootChains(iptables_cmd_path, &buf, ifname);
iptablesRenameTmpRootChains(IPTABLES_CMD, &buf, ifname);
ebiptablesExecCLI(&buf, &cli_status);
iptablesRenameTmpRootChains(iptables_cmd_path, &buf, ifname);
ebiptablesExecCLI(&buf, &cli_status);
}
iptablesUnlinkRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesRemoveRootChains(IP6TABLES_CMD, &buf, ifname);
if (ip6tables_cmd_path) {
iptablesUnlinkRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesRemoveRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesRenameTmpRootChains(IP6TABLES_CMD, &buf, ifname);
ebiptablesExecCLI(&buf, &cli_status);
iptablesRenameTmpRootChains(ip6tables_cmd_path, &buf, ifname);
ebiptablesExecCLI(&buf, &cli_status);
}
ebtablesUnlinkRootChain(&buf, 1, ifname);
ebtablesUnlinkRootChain(&buf, 0, ifname);
if (ebtables_cmd_path) {
ebtablesUnlinkRootChain(&buf, 1, ifname);
ebtablesUnlinkRootChain(&buf, 0, ifname);
ebtablesRemoveSubChains(&buf, ifname);
ebtablesRemoveSubChains(&buf, ifname);
ebtablesRemoveRootChain(&buf, 1, ifname);
ebtablesRemoveRootChain(&buf, 0, ifname);
ebtablesRemoveRootChain(&buf, 1, ifname);
ebtablesRemoveRootChain(&buf, 0, ifname);
ebtablesRenameTmpSubChains(&buf, ifname);
ebtablesRenameTmpRootChain(&buf, 1, ifname);
ebtablesRenameTmpRootChain(&buf, 0, ifname);
ebtablesRenameTmpSubChains(&buf, ifname);
ebtablesRenameTmpRootChain(&buf, 1, ifname);
ebtablesRenameTmpRootChain(&buf, 0, ifname);
ebiptablesExecCLI(&buf, &cli_status);
ebiptablesExecCLI(&buf, &cli_status);
}
return 0;
}
@ -3095,21 +3139,27 @@ ebiptablesAllTeardown(const char *ifname)
virBuffer buf = VIR_BUFFER_INITIALIZER;
int cli_status;
iptablesUnlinkRootChains(IPTABLES_CMD, &buf, ifname);
iptablesClearVirtInPost (IPTABLES_CMD, &buf, ifname);
iptablesRemoveRootChains(IPTABLES_CMD, &buf, ifname);
if (iptables_cmd_path) {
iptablesUnlinkRootChains(iptables_cmd_path, &buf, ifname);
iptablesClearVirtInPost (iptables_cmd_path, &buf, ifname);
iptablesRemoveRootChains(iptables_cmd_path, &buf, ifname);
}
iptablesUnlinkRootChains(IP6TABLES_CMD, &buf, ifname);
iptablesClearVirtInPost (IP6TABLES_CMD, &buf, ifname);
iptablesRemoveRootChains(IP6TABLES_CMD, &buf, ifname);
if (ip6tables_cmd_path) {
iptablesUnlinkRootChains(ip6tables_cmd_path, &buf, ifname);
iptablesClearVirtInPost (ip6tables_cmd_path, &buf, ifname);
iptablesRemoveRootChains(ip6tables_cmd_path, &buf, ifname);
}
ebtablesUnlinkRootChain(&buf, 1, ifname);
ebtablesUnlinkRootChain(&buf, 0, ifname);
if (ebtables_cmd_path) {
ebtablesUnlinkRootChain(&buf, 1, ifname);
ebtablesUnlinkRootChain(&buf, 0, ifname);
ebtablesRemoveRootChain(&buf, 1, ifname);
ebtablesRemoveRootChain(&buf, 0, ifname);
ebtablesRemoveRootChain(&buf, 1, ifname);
ebtablesRemoveRootChain(&buf, 0, ifname);
ebtablesRemoveSubChains(&buf, ifname);
ebtablesRemoveSubChains(&buf, ifname);
}
ebiptablesExecCLI(&buf, &cli_status);
@ -3119,6 +3169,10 @@ ebiptablesAllTeardown(const char *ifname)
virNWFilterTechDriver ebiptables_driver = {
.name = EBIPTABLES_DRIVER_ID,
.flags = 0,
.init = ebiptablesDriverInit,
.shutdown = ebiptablesDriverShutdown,
.createRuleInstance = ebiptablesCreateRuleInstance,
.applyNewRules = ebiptablesApplyNewRules,
@ -3129,3 +3183,91 @@ virNWFilterTechDriver ebiptables_driver = {
.freeRuleInstance = ebiptablesFreeRuleInstance,
.displayRuleInstance = ebiptablesDisplayRuleInstance,
};
static int
ebiptablesDriverInit(void)
{
virBuffer buf = VIR_BUFFER_INITIALIZER;
int cli_status;
bash_cmd_path = virFindFileInPath("bash");
gawk_cmd_path = virFindFileInPath("gawk");
grep_cmd_path = virFindFileInPath("grep");
ebtables_cmd_path = virFindFileInPath("ebtables");
if (ebtables_cmd_path) {
/* basic probing */
virBufferVSprintf(&buf,
CMD_DEF("%s -t %s -L") CMD_SEPARATOR
CMD_EXEC
"%s",
ebtables_cmd_path, EBTABLES_DEFAULT_TABLE,
CMD_STOPONERR(1));
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status)
VIR_FREE(ebtables_cmd_path);
}
iptables_cmd_path = virFindFileInPath("iptables");
if (iptables_cmd_path) {
virBufferVSprintf(&buf,
CMD_DEF("%s -L FORWARD") CMD_SEPARATOR
CMD_EXEC
"%s",
iptables_cmd_path,
CMD_STOPONERR(1));
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status)
VIR_FREE(iptables_cmd_path);
}
ip6tables_cmd_path = virFindFileInPath("ip6tables");
if (ip6tables_cmd_path) {
virBufferVSprintf(&buf,
CMD_DEF("%s -L FORWARD") CMD_SEPARATOR
CMD_EXEC
"%s",
ip6tables_cmd_path,
CMD_STOPONERR(1));
if (ebiptablesExecCLI(&buf, &cli_status) || cli_status)
VIR_FREE(ip6tables_cmd_path);
}
/* ip(6)tables support needs bash, gawk & grep, ebtables doesn't */
if ((iptables_cmd_path != NULL || ip6tables_cmd_path != NULL) &&
(!grep_cmd_path || !bash_cmd_path || !gawk_cmd_path)) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("essential tools to support ip(6)tables "
"firewalls could not be located"));
VIR_FREE(iptables_cmd_path);
VIR_FREE(ip6tables_cmd_path);
}
if (!ebtables_cmd_path && !iptables_cmd_path && !ip6tables_cmd_path) {
virNWFilterReportError(VIR_ERR_INTERNAL_ERROR, "%s",
_("firewall tools were not found or "
"cannot be used"));
ebiptablesDriverShutdown();
return ENOTSUP;
}
ebiptables_driver.flags = TECHDRV_FLAG_INITIALIZED;
return 0;
}
static void
ebiptablesDriverShutdown()
{
VIR_FREE(gawk_cmd_path);
VIR_FREE(bash_cmd_path);
VIR_FREE(grep_cmd_path);
VIR_FREE(ebtables_cmd_path);
VIR_FREE(iptables_cmd_path);
VIR_FREE(ip6tables_cmd_path);
ebiptables_driver.flags = 0;
}

25
src/nwfilter/nwfilter_gentech_driver.c
View File

@ -50,12 +50,35 @@ static virNWFilterTechDriverPtr filter_tech_drivers[] = {
};
void virNWFilterTechDriversInit() {
int i = 0;
while (filter_tech_drivers[i]) {
if (!(filter_tech_drivers[i]->flags & TECHDRV_FLAG_INITIALIZED))
filter_tech_drivers[i]->init();
i++;
}
}
void virNWFilterTechDriversShutdown() {
int i = 0;
while (filter_tech_drivers[i]) {
if ((filter_tech_drivers[i]->flags & TECHDRV_FLAG_INITIALIZED))
filter_tech_drivers[i]->shutdown();
i++;
}
}
virNWFilterTechDriverPtr
virNWFilterTechDriverForName(const char *name) {
int i = 0;
while (filter_tech_drivers[i]) {
if (STREQ(filter_tech_drivers[i]->name, name))
if (STREQ(filter_tech_drivers[i]->name, name)) {
if ((filter_tech_drivers[i]->flags & TECHDRV_FLAG_INITIALIZED) == 0)
break;
return filter_tech_drivers[i];
}
i++;
}
return NULL;

2
src/nwfilter/nwfilter_gentech_driver.h
View File

@ -28,6 +28,8 @@ virNWFilterTechDriverPtr virNWFilterTechDriverForName(const char *name);
int virNWFilterRuleInstAddData(virNWFilterRuleInstPtr res,
void *data);
void virNWFilterTechDriversInit(void);
void virNWFilterTechDriversShutdown(void);
enum instCase {
INSTANTIATE_ALWAYS,