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-rw-r--r--configure.ac4
-rw-r--r--include/xtables.h.in5
-rw-r--r--ip6tables.8.in3
-rw-r--r--ip6tables.c49
-rw-r--r--iptables.8.in7
-rw-r--r--iptables.c42
-rw-r--r--xtables.c175
7 files changed, 251 insertions, 34 deletions
diff --git a/configure.ac b/configure.ac
index 74c38355..bc74efee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2,8 +2,8 @@
AC_INIT([iptables], [1.4.4])
# See libtool.info "Libtool's versioning system"
-libxtables_vcurrent=2
-libxtables_vage=0
+libxtables_vcurrent=3
+libxtables_vage=1
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_MACRO_DIR([m4])
diff --git a/include/xtables.h.in b/include/xtables.h.in
index 4d4ca0a6..037fae19 100644
--- a/include/xtables.h.in
+++ b/include/xtables.h.in
@@ -215,6 +215,7 @@ extern void xtables_init(void);
extern void xtables_set_nfproto(uint8_t);
extern void *xtables_calloc(size_t, size_t);
extern void *xtables_malloc(size_t);
+extern void *xtables_realloc(void *, size_t);
extern int xtables_insmod(const char *, const char *, bool);
extern int xtables_load_ko(const char *, bool);
@@ -260,6 +261,8 @@ extern struct in_addr *xtables_numeric_to_ipaddr(const char *);
extern struct in_addr *xtables_numeric_to_ipmask(const char *);
extern void xtables_ipparse_any(const char *, struct in_addr **,
struct in_addr *, unsigned int *);
+extern void xtables_ipparse_multiple(const char *, struct in_addr **,
+ struct in_addr **, unsigned int *);
extern struct in6_addr *xtables_numeric_to_ip6addr(const char *);
extern const char *xtables_ip6addr_to_numeric(const struct in6_addr *);
@@ -267,6 +270,8 @@ extern const char *xtables_ip6addr_to_anyname(const struct in6_addr *);
extern const char *xtables_ip6mask_to_numeric(const struct in6_addr *);
extern void xtables_ip6parse_any(const char *, struct in6_addr **,
struct in6_addr *, unsigned int *);
+extern void xtables_ip6parse_multiple(const char *, struct in6_addr **,
+ struct in6_addr **, unsigned int *);
/**
* Print the specified value to standard output, quoting dangerous
diff --git a/ip6tables.8.in b/ip6tables.8.in
index a31887e8..8037dc7d 100644
--- a/ip6tables.8.in
+++ b/ip6tables.8.in
@@ -248,6 +248,9 @@ specifying the number of 1's at the left side of the network mask.
A "!" argument before the address specification inverts the sense of
the address. The flag \fB\-\-src\fP
is an alias for this option.
+Multiple addresses can be specified, but this will \fBexpand to multiple
+rules\fP (when adding with \-A), or will cause multiple rules to be
+deleted (with \-D).
.TP
[\fB!\fP] \fB\-d\fP, \fB\-\-destination\fP \fIaddress\fP[\fB/\fP\fImask\fP]
Destination specification.
diff --git a/ip6tables.c b/ip6tables.c
index 35067f8b..31c4b451 100644
--- a/ip6tables.c
+++ b/ip6tables.c
@@ -281,9 +281,9 @@ exit_printhelp(struct xtables_rule_match *matches)
"Options:\n"
"[!] --proto -p proto protocol: by number or name, eg. `tcp'\n"
-"[!] --source -s address[/mask]\n"
+"[!] --source -s address[/mask][,...]\n"
" source specification\n"
-"[!] --destination -d address[/mask]\n"
+"[!] --destination -d address[/mask][,...]\n"
" destination specification\n"
"[!] --in-interface -i input name[+]\n"
" network interface name ([+] for wildcard)\n"
@@ -740,8 +740,10 @@ append_entry(const ip6t_chainlabel chain,
struct ip6t_entry *fw,
unsigned int nsaddrs,
const struct in6_addr saddrs[],
+ const struct in6_addr smasks[],
unsigned int ndaddrs,
const struct in6_addr daddrs[],
+ const struct in6_addr dmasks[],
int verbose,
struct ip6tc_handle *handle)
{
@@ -750,8 +752,10 @@ append_entry(const ip6t_chainlabel chain,
for (i = 0; i < nsaddrs; i++) {
fw->ipv6.src = saddrs[i];
+ fw->ipv6.smsk = smasks[i];
for (j = 0; j < ndaddrs; j++) {
fw->ipv6.dst = daddrs[j];
+ fw->ipv6.dmsk = dmasks[j];
if (verbose)
print_firewall_line(fw, handle);
ret &= ip6tc_append_entry(chain, fw, handle);
@@ -784,8 +788,10 @@ insert_entry(const ip6t_chainlabel chain,
unsigned int rulenum,
unsigned int nsaddrs,
const struct in6_addr saddrs[],
+ const struct in6_addr smasks[],
unsigned int ndaddrs,
const struct in6_addr daddrs[],
+ const struct in6_addr dmasks[],
int verbose,
struct ip6tc_handle *handle)
{
@@ -794,8 +800,10 @@ insert_entry(const ip6t_chainlabel chain,
for (i = 0; i < nsaddrs; i++) {
fw->ipv6.src = saddrs[i];
+ fw->ipv6.smsk = smasks[i];
for (j = 0; j < ndaddrs; j++) {
fw->ipv6.dst = daddrs[j];
+ fw->ipv6.dmsk = dmasks[j];
if (verbose)
print_firewall_line(fw, handle);
ret &= ip6tc_insert_entry(chain, fw, rulenum, handle);
@@ -806,7 +814,7 @@ insert_entry(const ip6t_chainlabel chain,
}
static unsigned char *
-make_delete_mask(struct ip6t_entry *fw, struct xtables_rule_match *matches)
+make_delete_mask(struct xtables_rule_match *matches)
{
/* Establish mask for comparison */
unsigned int size;
@@ -843,8 +851,10 @@ delete_entry(const ip6t_chainlabel chain,
struct ip6t_entry *fw,
unsigned int nsaddrs,
const struct in6_addr saddrs[],
+ const struct in6_addr smasks[],
unsigned int ndaddrs,
const struct in6_addr daddrs[],
+ const struct in6_addr dmasks[],
int verbose,
struct ip6tc_handle *handle,
struct xtables_rule_match *matches)
@@ -853,11 +863,13 @@ delete_entry(const ip6t_chainlabel chain,
int ret = 1;
unsigned char *mask;
- mask = make_delete_mask(fw, matches);
+ mask = make_delete_mask(matches);
for (i = 0; i < nsaddrs; i++) {
fw->ipv6.src = saddrs[i];
+ fw->ipv6.smsk = smasks[i];
for (j = 0; j < ndaddrs; j++) {
fw->ipv6.dst = daddrs[j];
+ fw->ipv6.dmsk = dmasks[j];
if (verbose)
print_firewall_line(fw, handle);
ret &= ip6tc_delete_entry(chain, fw, mask, handle);
@@ -1291,9 +1303,9 @@ int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **hand
int invert = 0;
unsigned int nsaddrs = 0, ndaddrs = 0;
struct in6_addr *saddrs = NULL, *daddrs = NULL;
+ struct in6_addr *smasks = NULL, *dmasks = NULL;
int c, verbose = 0;
- unsigned i;
const char *chain = NULL;
const char *shostnetworkmask = NULL, *dhostnetworkmask = NULL;
const char *policy = NULL, *newname = NULL;
@@ -1811,12 +1823,12 @@ int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **hand
}
if (shostnetworkmask)
- xtables_ip6parse_any(shostnetworkmask, &saddrs,
- &fw.ipv6.smsk, &nsaddrs);
+ xtables_ip6parse_multiple(shostnetworkmask, &saddrs,
+ &smasks, &nsaddrs);
if (dhostnetworkmask)
- xtables_ip6parse_any(dhostnetworkmask, &daddrs,
- &fw.ipv6.dmsk, &ndaddrs);
+ xtables_ip6parse_multiple(dhostnetworkmask, &daddrs,
+ &dmasks, &ndaddrs);
if ((nsaddrs > 1 || ndaddrs > 1) &&
(fw.ipv6.invflags & (IP6T_INV_SRCIP | IP6T_INV_DSTIP)))
@@ -1921,13 +1933,15 @@ int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **hand
switch (command) {
case CMD_APPEND:
ret = append_entry(chain, e,
- nsaddrs, saddrs, ndaddrs, daddrs,
+ nsaddrs, saddrs, smasks,
+ ndaddrs, daddrs, dmasks,
options&OPT_VERBOSE,
*handle);
break;
case CMD_DELETE:
ret = delete_entry(chain, e,
- nsaddrs, saddrs, ndaddrs, daddrs,
+ nsaddrs, saddrs, smasks,
+ ndaddrs, daddrs, dmasks,
options&OPT_VERBOSE,
*handle, matches);
break;
@@ -1941,7 +1955,8 @@ int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **hand
break;
case CMD_INSERT:
ret = insert_entry(chain, e, rulenum - 1,
- nsaddrs, saddrs, ndaddrs, daddrs,
+ nsaddrs, saddrs, smasks,
+ ndaddrs, daddrs, dmasks,
options&OPT_VERBOSE,
*handle);
break;
@@ -2001,12 +2016,10 @@ int do_command6(int argc, char *argv[], char **table, struct ip6tc_handle **hand
e = NULL;
}
- for (i = 0; i < nsaddrs; i++)
- free(&saddrs[i]);
-
- for (i = 0; i < ndaddrs; i++)
- free(&daddrs[i]);
-
+ free(saddrs);
+ free(smasks);
+ free(daddrs);
+ free(dmasks);
xtables_free_opts(1);
return ret;
diff --git a/iptables.8.in b/iptables.8.in
index 10dcb734..14fc23ad 100644
--- a/iptables.8.in
+++ b/iptables.8.in
@@ -236,7 +236,7 @@ Protocol \fBall\fP
will match with all protocols and is taken as default when this
option is omitted.
.TP
-[\fB!\fP] \fB\-s\fP, \fB\-\-source\fP \fIaddress\fP[\fB/\fP\fImask\fP]
+[\fB!\fP] \fB\-s\fP, \fB\-\-source\fP \fIaddress\fP[\fB/\fP\fImask\fP][\fB,\fP\fI...\fP]
Source specification. \fIAddress\fP
can be either a network name, a hostname (please note that specifying
any name to be resolved with a remote query such as DNS is a really bad idea),
@@ -247,8 +247,11 @@ specifying the number of 1's at the left side of the network mask.
Thus, a mask of \fI24\fP is equivalent to \fI255.255.255.0\fP.
A "!" argument before the address specification inverts the sense of
the address. The flag \fB\-\-src\fP is an alias for this option.
+Multiple addresses can be specified, but this will \fBexpand to multiple
+rules\fP (when adding with \-A), or will cause multiple rules to be
+deleted (with \-D).
.TP
-[\fB!\fP] \fB\-d\fP, \fB\-\-destination\fP \fIaddress\fP[\fB/\fP\fImask\fP]
+[\fB!\fP] \fB\-d\fP, \fB\-\-destination\fP \fIaddress\fP[\fB/\fP\fImask\fP][\fB,\fP\fI...\fP]
Destination specification.
See the description of the \fB\-s\fP
(source) flag for a detailed description of the syntax. The flag
diff --git a/iptables.c b/iptables.c
index 649baf4c..7c075dac 100644
--- a/iptables.c
+++ b/iptables.c
@@ -294,9 +294,9 @@ exit_printhelp(struct xtables_rule_match *matches)
"Options:\n"
"[!] --proto -p proto protocol: by number or name, eg. `tcp'\n"
-"[!] --source -s address[/mask]\n"
+"[!] --source -s address[/mask][...]\n"
" source specification\n"
-"[!] --destination -d address[/mask]\n"
+"[!] --destination -d address[/mask][...]\n"
" destination specification\n"
"[!] --in-interface -i input name[+]\n"
" network interface name ([+] for wildcard)\n"
@@ -742,8 +742,10 @@ append_entry(const ipt_chainlabel chain,
struct ipt_entry *fw,
unsigned int nsaddrs,
const struct in_addr saddrs[],
+ const struct in_addr smasks[],
unsigned int ndaddrs,
const struct in_addr daddrs[],
+ const struct in_addr dmasks[],
int verbose,
struct iptc_handle *handle)
{
@@ -752,8 +754,10 @@ append_entry(const ipt_chainlabel chain,
for (i = 0; i < nsaddrs; i++) {
fw->ip.src.s_addr = saddrs[i].s_addr;
+ fw->ip.smsk.s_addr = smasks[i].s_addr;
for (j = 0; j < ndaddrs; j++) {
fw->ip.dst.s_addr = daddrs[j].s_addr;
+ fw->ip.dmsk.s_addr = dmasks[j].s_addr;
if (verbose)
print_firewall_line(fw, handle);
ret &= iptc_append_entry(chain, fw, handle);
@@ -786,8 +790,10 @@ insert_entry(const ipt_chainlabel chain,
unsigned int rulenum,
unsigned int nsaddrs,
const struct in_addr saddrs[],
+ const struct in_addr smasks[],
unsigned int ndaddrs,
const struct in_addr daddrs[],
+ const struct in_addr dmasks[],
int verbose,
struct iptc_handle *handle)
{
@@ -796,8 +802,10 @@ insert_entry(const ipt_chainlabel chain,
for (i = 0; i < nsaddrs; i++) {
fw->ip.src.s_addr = saddrs[i].s_addr;
+ fw->ip.smsk.s_addr = smasks[i].s_addr;
for (j = 0; j < ndaddrs; j++) {
fw->ip.dst.s_addr = daddrs[j].s_addr;
+ fw->ip.dmsk.s_addr = dmasks[j].s_addr;
if (verbose)
print_firewall_line(fw, handle);
ret &= iptc_insert_entry(chain, fw, rulenum, handle);
@@ -808,7 +816,7 @@ insert_entry(const ipt_chainlabel chain,
}
static unsigned char *
-make_delete_mask(struct ipt_entry *fw, struct xtables_rule_match *matches)
+make_delete_mask(struct xtables_rule_match *matches)
{
/* Establish mask for comparison */
unsigned int size;
@@ -845,8 +853,10 @@ delete_entry(const ipt_chainlabel chain,
struct ipt_entry *fw,
unsigned int nsaddrs,
const struct in_addr saddrs[],
+ const struct in_addr smasks[],
unsigned int ndaddrs,
const struct in_addr daddrs[],
+ const struct in_addr dmasks[],
int verbose,
struct iptc_handle *handle,
struct xtables_rule_match *matches)
@@ -855,11 +865,13 @@ delete_entry(const ipt_chainlabel chain,
int ret = 1;
unsigned char *mask;
- mask = make_delete_mask(fw, matches);
+ mask = make_delete_mask(matches);
for (i = 0; i < nsaddrs; i++) {
fw->ip.src.s_addr = saddrs[i].s_addr;
+ fw->ip.smsk.s_addr = smasks[i].s_addr;
for (j = 0; j < ndaddrs; j++) {
fw->ip.dst.s_addr = daddrs[j].s_addr;
+ fw->ip.dmsk.s_addr = dmasks[j].s_addr;
if (verbose)
print_firewall_line(fw, handle);
ret &= iptc_delete_entry(chain, fw, mask, handle);
@@ -1313,7 +1325,8 @@ int do_command(int argc, char *argv[], char **table, struct iptc_handle **handle
struct ipt_entry fw, *e = NULL;
int invert = 0;
unsigned int nsaddrs = 0, ndaddrs = 0;
- struct in_addr *saddrs = NULL, *daddrs = NULL;
+ struct in_addr *saddrs = NULL, *smasks = NULL;
+ struct in_addr *daddrs = NULL, *dmasks = NULL;
int c, verbose = 0;
const char *chain = NULL;
@@ -1848,12 +1861,12 @@ int do_command(int argc, char *argv[], char **table, struct iptc_handle **handle
}
if (shostnetworkmask)
- xtables_ipparse_any(shostnetworkmask, &saddrs,
- &fw.ip.smsk, &nsaddrs);
+ xtables_ipparse_multiple(shostnetworkmask, &saddrs,
+ &smasks, &nsaddrs);
if (dhostnetworkmask)
- xtables_ipparse_any(dhostnetworkmask, &daddrs,
- &fw.ip.dmsk, &ndaddrs);
+ xtables_ipparse_multiple(dhostnetworkmask, &daddrs,
+ &dmasks, &ndaddrs);
if ((nsaddrs > 1 || ndaddrs > 1) &&
(fw.ip.invflags & (IPT_INV_SRCIP | IPT_INV_DSTIP)))
@@ -1961,13 +1974,15 @@ int do_command(int argc, char *argv[], char **table, struct iptc_handle **handle
switch (command) {
case CMD_APPEND:
ret = append_entry(chain, e,
- nsaddrs, saddrs, ndaddrs, daddrs,
+ nsaddrs, saddrs, smasks,
+ ndaddrs, daddrs, dmasks,
options&OPT_VERBOSE,
*handle);
break;
case CMD_DELETE:
ret = delete_entry(chain, e,
- nsaddrs, saddrs, ndaddrs, daddrs,
+ nsaddrs, saddrs, smasks,
+ ndaddrs, daddrs, dmasks,
options&OPT_VERBOSE,
*handle, matches);
break;
@@ -1981,7 +1996,8 @@ int do_command(int argc, char *argv[], char **table, struct iptc_handle **handle
break;
case CMD_INSERT:
ret = insert_entry(chain, e, rulenum - 1,
- nsaddrs, saddrs, ndaddrs, daddrs,
+ nsaddrs, saddrs, smasks,
+ ndaddrs, daddrs, dmasks,
options&OPT_VERBOSE,
*handle);
break;
@@ -2042,7 +2058,9 @@ int do_command(int argc, char *argv[], char **table, struct iptc_handle **handle
}
free(saddrs);
+ free(smasks);
free(daddrs);
+ free(dmasks);
xtables_free_opts(1);
return ret;
diff --git a/xtables.c b/xtables.c
index e0183310..05154dd8 100644
--- a/xtables.c
+++ b/xtables.c
@@ -271,6 +271,18 @@ void *xtables_malloc(size_t size)
return p;
}
+void *xtables_realloc(void *ptr, size_t size)
+{
+ void *p;
+
+ if ((p = realloc(ptr, size)) == NULL) {
+ perror("ip[6]tables: realloc failed");
+ exit(1);
+ }
+
+ return p;
+}
+
static char *get_modprobe(void)
{
int procfile;
@@ -1133,6 +1145,86 @@ static struct in_addr *parse_ipmask(const char *mask)
return &maskaddr;
}
+void xtables_ipparse_multiple(const char *name, struct in_addr **addrpp,
+ struct in_addr **maskpp, unsigned int *naddrs)
+{
+ struct in_addr *addrp;
+ char buf[256], *p;
+ unsigned int len, i, j, n, count = 1;
+ const char *loop = name;
+
+ while ((loop = strchr(loop, ',')) != NULL) {
+ ++count;
+ ++loop; /* skip ',' */
+ }
+
+ *addrpp = xtables_malloc(sizeof(struct in_addr) * count);
+ *maskpp = xtables_malloc(sizeof(struct in_addr) * count);
+
+ loop = name;
+
+ for (i = 0; i < count; ++i) {
+ if (loop == NULL)
+ break;
+ if (*loop == ',')
+ ++loop;
+ if (*loop == '\0')
+ break;
+ p = strchr(loop, ',');
+ if (p != NULL)
+ len = p - loop;
+ else
+ len = strlen(loop);
+ if (len == 0 || sizeof(buf) - 1 < len)
+ break;
+
+ strncpy(buf, loop, len);
+ buf[len] = '\0';
+ loop += len;
+ if ((p = strrchr(buf, '/')) != NULL) {
+ *p = '\0';
+ addrp = parse_ipmask(p + 1);
+ } else {
+ addrp = parse_ipmask(NULL);
+ }
+ memcpy(*maskpp + i, addrp, sizeof(*addrp));
+
+ /* if a null mask is given, the name is ignored, like in "any/0" */
+ if ((*maskpp + i)->s_addr == 0)
+ /*
+ * A bit pointless to process multiple addresses
+ * in this case...
+ */
+ strcpy(buf, "0.0.0.0");
+
+ addrp = ipparse_hostnetwork(buf, &n);
+ if (n > 1) {
+ count += n - 1;
+ *addrpp = xtables_realloc(*addrpp,
+ sizeof(struct in_addr) * count);
+ *maskpp = xtables_realloc(*maskpp,
+ sizeof(struct in_addr) * count);
+ for (j = 0; j < n; ++j)
+ /* for each new addr */
+ memcpy(*addrpp + i + j, addrp + j,
+ sizeof(*addrp));
+ for (j = 1; j < n; ++j)
+ /* for each new mask */
+ memcpy(*maskpp + i + j, *maskpp + i,
+ sizeof(*addrp));
+ i += n - 1;
+ } else {
+ memcpy(*addrpp + i, addrp, sizeof(*addrp));
+ }
+ /* free what ipparse_hostnetwork had allocated: */
+ free(addrp);
+ }
+ *naddrs = count;
+ for (i = 0; i < n; ++i)
+ (*addrpp+i)->s_addr &= (*maskpp+i)->s_addr;
+}
+
+
/**
* xtables_ipparse_any - transform arbitrary name to in_addr
*
@@ -1364,6 +1456,89 @@ static struct in6_addr *parse_ip6mask(char *mask)
return &maskaddr;
}
+void
+xtables_ip6parse_multiple(const char *name, struct in6_addr **addrpp,
+ struct in6_addr **maskpp, unsigned int *naddrs)
+{
+ struct in6_addr *addrp;
+ char buf[256], *p;
+ unsigned int len, i, j, n, count = 1;
+ const char *loop = name;
+
+ while ((loop = strchr(loop, ',')) != NULL) {
+ ++count;
+ ++loop; /* skip ',' */
+ }
+
+ *addrpp = xtables_malloc(sizeof(struct in6_addr) * count);
+ *maskpp = xtables_malloc(sizeof(struct in6_addr) * count);
+
+ loop = name;
+
+ for (i = 0; i < count /*NB: count can grow*/; ++i) {
+ if (loop == NULL)
+ break;
+ if (*loop == ',')
+ ++loop;
+ if (*loop == '\0')
+ break;
+ p = strchr(loop, ',');
+ if (p != NULL)
+ len = p - loop;
+ else
+ len = strlen(loop);
+ if (len == 0 || sizeof(buf) - 1 < len)
+ break;
+
+ strncpy(buf, loop, len);
+ buf[len] = '\0';
+ loop += len;
+ if ((p = strrchr(buf, '/')) != NULL) {
+ *p = '\0';
+ addrp = parse_ip6mask(p + 1);
+ } else {
+ addrp = parse_ip6mask(NULL);
+ }
+ memcpy(*maskpp + i, addrp, sizeof(*addrp));
+
+ /* if a null mask is given, the name is ignored, like in "any/0" */
+ if (memcmp(*maskpp + i, &in6addr_any, sizeof(in6addr_any)) == 0)
+ strcpy(buf, "::");
+
+ addrp = ip6parse_hostnetwork(buf, &n);
+ /* ip6parse_hostnetwork only ever returns one IP
+ address (it exits if the resolution fails).
+ Therefore, n will always be 1 here. Leaving the
+ code below in anyway in case ip6parse_hostnetwork
+ is improved some day to behave like
+ ipparse_hostnetwork: */
+ if (n > 1) {
+ count += n - 1;
+ *addrpp = xtables_realloc(*addrpp,
+ sizeof(struct in6_addr) * count);
+ *maskpp = xtables_realloc(*maskpp,
+ sizeof(struct in6_addr) * count);
+ for (j = 0; j < n; ++j)
+ /* for each new addr */
+ memcpy(*addrpp + i + j, addrp + j,
+ sizeof(*addrp));
+ for (j = 1; j < n; ++j)
+ /* for each new mask */
+ memcpy(*maskpp + i + j, *maskpp + i,
+ sizeof(*addrp));
+ i += n - 1;
+ } else {
+ memcpy(*addrpp + i, addrp, sizeof(*addrp));
+ }
+ /* free what ip6parse_hostnetwork had allocated: */
+ free(addrp);
+ }
+ *naddrs = count;
+ for (i = 0; i < n; ++i)
+ for (j = 0; j < 4; ++j)
+ (*addrpp+i)->s6_addr32[j] &= (*maskpp+i)->s6_addr32[j];
+}
+
void xtables_ip6parse_any(const char *name, struct in6_addr **addrpp,
struct in6_addr *maskp, unsigned int *naddrs)
{