Add support for xt_iprange revision 1.
Signed-off-by: Jan Engelhardt <jengelh@xxxxxxxxxxxxxxx>
---
extensions/libxt_iprange.c | 217 ++++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 216 insertions(+), 1 deletion(-)
Index: iptables-modules/extensions/libxt_iprange.c
===================================================================
--- iptables-modules.orig/extensions/libxt_iprange.c
+++ iptables-modules/extensions/libxt_iprange.c
@@ -5,9 +5,16 @@
#include <stdlib.h>
#include <getopt.h>
-#include <iptables.h>
+#include <xtables.h>
+#include <linux/netfilter.h>
+#include <linux/netfilter/xt_iprange.h>
#include <linux/netfilter_ipv4/ipt_iprange.h>
+enum {
+ F_SRCIP = 1 << 0,
+ F_DSTIP = 1 << 1,
+};
+
static void iprange_mt_help(void)
{
printf(
@@ -91,6 +98,94 @@ static int iprange_parse(int c, char **a
return 1;
}
+static int
+iprange_mt4_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct xt_iprange_mtinfo *info = (void *)(*match)->data;
+ const struct in_addr *ia;
+ char *end;
+
+ switch (c) {
+ case '1': /* --src-ip */
+ end = strchr(optarg, '-');
+ if (end == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--src-ip", optarg);
+ *end = '\0';
+ ia = numeric_to_ipaddr(optarg);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--src-ip", optarg);
+ memcpy(&info->src_min.in, ia, sizeof(*ia));
+ ia = numeric_to_ipaddr(end+1);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--src-ip", end + 1);
+ memcpy(&info->src_max.in, ia, sizeof(*ia));
+ *flags |= F_SRCIP;
+ return true;
+
+ case '2': /* --dst-ip */
+ end = strchr(optarg, '-');
+ if (end == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--dst-ip", optarg);
+ *end = '\0';
+ ia = numeric_to_ipaddr(optarg);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--dst-ip", optarg);
+ memcpy(&info->dst_min.in, ia, sizeof(*ia));
+ ia = numeric_to_ipaddr(end + 1);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--dst-ip", end + 1);
+ memcpy(&info->dst_max.in, ia, sizeof(*ia));
+ *flags |= F_DSTIP;
+ return true;
+ }
+ return false;
+}
+
+static int
+iprange_mt6_parse(int c, char **argv, int invert, unsigned int *flags,
+ const void *entry, struct xt_entry_match **match)
+{
+ struct xt_iprange_mtinfo *info = (void *)(*match)->data;
+ const struct in6_addr *ia;
+ char *end;
+
+ switch (c) {
+ case '1': /* --src-ip */
+ end = strchr(optarg, '-');
+ if (end == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--src-ip", optarg);
+ *end = '\0';
+ ia = numeric_to_ip6addr(optarg);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--src-ip", optarg);
+ memcpy(&info->src_min.in, ia, sizeof(*ia));
+ ia = numeric_to_ip6addr(end+1);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--src-ip", end + 1);
+ memcpy(&info->src_max.in, ia, sizeof(*ia));
+ *flags |= F_SRCIP;
+ return true;
+
+ case '2': /* --dst-ip */
+ end = strchr(optarg, '-');
+ if (end == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--dst-ip", optarg);
+ *end = '\0';
+ ia = numeric_to_ip6addr(optarg);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--dst-ip", optarg);
+ memcpy(&info->dst_min.in, ia, sizeof(*ia));
+ ia = numeric_to_ip6addr(end + 1);
+ if (ia == NULL)
+ param_act(P_BAD_VALUE, "iprange", "--dst-ip", end + 1);
+ memcpy(&info->dst_max.in, ia, sizeof(*ia));
+ *flags |= F_DSTIP;
+ return true;
+ }
+ return false;
+}
+
static void iprange_mt_check(unsigned int flags)
{
if (flags == 0)
@@ -129,6 +224,58 @@ static void iprange_print(const void *ip
}
}
+static void
+iprange_mt4_print(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ const struct xt_iprange_mtinfo *info = (const void *)match->data;
+
+ if (info->flags & IPRANGE_SRC) {
+ printf("source IP range ");
+ if (info->flags & IPRANGE_SRC_INV)
+ printf("! ");
+ /*
+ * ipaddr_to_numeric() uses a static buffer, so cannot
+ * combine the printf() calls.
+ */
+ printf("%s", ipaddr_to_numeric(&info->src_min.in));
+ printf("-%s ", ipaddr_to_numeric(&info->src_max.in));
+ }
+ if (info->flags & IPRANGE_DST) {
+ printf("destination IP range ");
+ if (info->flags & IPRANGE_DST_INV)
+ printf("! ");
+ printf("%s", ipaddr_to_numeric(&info->dst_min.in));
+ printf("-%s ", ipaddr_to_numeric(&info->dst_max.in));
+ }
+}
+
+static void
+iprange_mt6_print(const void *ip, const struct xt_entry_match *match,
+ int numeric)
+{
+ const struct xt_iprange_mtinfo *info = (const void *)match->data;
+
+ if (info->flags & IPRANGE_SRC) {
+ printf("source IP range ");
+ if (info->flags & IPRANGE_SRC_INV)
+ printf("! ");
+ /*
+ * ipaddr_to_numeric() uses a static buffer, so cannot
+ * combine the printf() calls.
+ */
+ printf("%s", ip6addr_to_numeric(&info->src_min.in6));
+ printf("-%s ", ip6addr_to_numeric(&info->src_max.in6));
+ }
+ if (info->flags & IPRANGE_DST) {
+ printf("destination IP range ");
+ if (info->flags & IPRANGE_DST_INV)
+ printf("! ");
+ printf("%s", ip6addr_to_numeric(&info->dst_min.in6));
+ printf("-%s ", ip6addr_to_numeric(&info->dst_max.in6));
+ }
+}
+
static void iprange_save(const void *ip, const struct xt_entry_match *match)
{
const struct ipt_iprange_info *info = (const void *)match->data;
@@ -149,6 +296,42 @@ static void iprange_save(const void *ip,
}
}
+static void iprange_mt4_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct xt_iprange_mtinfo *info = (const void *)match->data;
+
+ if (info->flags & IPRANGE_SRC) {
+ if (info->flags & IPRANGE_SRC_INV)
+ printf("! ");
+ printf("--src-range %s", ipaddr_to_numeric(&info->src_min.in));
+ printf("-%s ", ipaddr_to_numeric(&info->src_max.in));
+ }
+ if (info->flags & IPRANGE_DST) {
+ if (info->flags & IPRANGE_DST_INV)
+ printf("! ");
+ printf("--dst-range %s", ipaddr_to_numeric(&info->dst_min.in));
+ printf("-%s ", ipaddr_to_numeric(&info->dst_max.in));
+ }
+}
+
+static void iprange_mt6_save(const void *ip, const struct xt_entry_match *match)
+{
+ const struct xt_iprange_mtinfo *info = (const void *)match->data;
+
+ if (info->flags & IPRANGE_SRC) {
+ if (info->flags & IPRANGE_SRC_INV)
+ printf("! ");
+ printf("--src-range %s", ip6addr_to_numeric(&info->src_min.in6));
+ printf("-%s ", ip6addr_to_numeric(&info->src_max.in6));
+ }
+ if (info->flags & IPRANGE_DST) {
+ if (info->flags & IPRANGE_DST_INV)
+ printf("! ");
+ printf("--dst-range %s", ip6addr_to_numeric(&info->dst_min.in6));
+ printf("-%s ", ip6addr_to_numeric(&info->dst_max.in6));
+ }
+}
+
static struct xtables_match iprange_match = {
.version = IPTABLES_VERSION,
.name = "iprange",
@@ -164,7 +347,39 @@ static struct xtables_match iprange_matc
.extra_opts = iprange_mt_opts,
};
+static struct xtables_match iprange_mt_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "iprange",
+ .revision = 1,
+ .family = AF_INET,
+ .size = XT_ALIGN(sizeof(struct xt_iprange_mtinfo)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_iprange_mtinfo)),
+ .help = iprange_mt_help,
+ .parse = iprange_mt4_parse,
+ .final_check = iprange_mt_check,
+ .print = iprange_mt4_print,
+ .save = iprange_mt4_save,
+ .extra_opts = iprange_mt_opts,
+};
+
+static struct xtables_match iprange_mt6_reg = {
+ .version = IPTABLES_VERSION,
+ .name = "iprange",
+ .revision = 1,
+ .family = AF_INET6,
+ .size = XT_ALIGN(sizeof(struct xt_iprange_mtinfo)),
+ .userspacesize = XT_ALIGN(sizeof(struct xt_iprange_mtinfo)),
+ .help = iprange_mt_help,
+ .parse = iprange_mt6_parse,
+ .final_check = iprange_mt_check,
+ .print = iprange_mt6_print,
+ .save = iprange_mt6_save,
+ .extra_opts = iprange_mt_opts,
+};
+
void _init(void)
{
xtables_register_match(&iprange_match);
+ xtables_register_match(&iprange_mt_reg);
+ xtables_register_match(&iprange_mt6_reg);
}
-
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