libxtables: XTTYPE_ETHERMAC support
Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
diff --git a/include/xtables.h.in b/include/xtables.h.in
index c3996a0..0fe4b90 100644
--- a/include/xtables.h.in
+++ b/include/xtables.h.in
@@ -70,6 +70,7 @@
* %XTTYPE_PORTRC_NE: same as %XTTYPE_PORTRC, stored in network-endian
* %XTTYPE_PLEN: prefix length
* %XTTYPE_PLENMASK: prefix length (ptr: union nf_inet_addr)
+ * %XTTYPE_ETHERMAC: Ethernet MAC address in hex form
*/
enum xt_option_type {
XTTYPE_NONE,
@@ -95,6 +96,7 @@
XTTYPE_PORTRC_NE,
XTTYPE_PLEN,
XTTYPE_PLENMASK,
+ XTTYPE_ETHERMAC,
};
/**
@@ -164,6 +166,7 @@
struct {
uint32_t mark, mask;
};
+ uint8_t ethermac[6];
} val;
/* Wished for a world where the ones below were gone: */
union {
diff --git a/xtoptions.c b/xtoptions.c
index 70370ed..8d54dd8 100644
--- a/xtoptions.c
+++ b/xtoptions.c
@@ -672,6 +672,30 @@
cb->arg = orig_arg;
}
+static void xtopt_parse_ethermac(struct xt_option_call *cb)
+{
+ const char *arg = cb->arg;
+ unsigned int i;
+ char *end;
+
+ for (i = 0; i < ARRAY_SIZE(cb->val.ethermac) - 1; ++i) {
+ cb->val.ethermac[i] = strtoul(arg, &end, 16);
+ if (cb->val.ethermac[i] > UINT8_MAX || *end != ':')
+ goto out;
+ arg = end + 1;
+ }
+ i = ARRAY_SIZE(cb->val.ethermac) - 1;
+ cb->val.ethermac[i] = strtoul(arg, &end, 16);
+ if (cb->val.ethermac[i] > UINT8_MAX || *end != '\0')
+ goto out;
+ if (cb->entry->flags & XTOPT_PUT)
+ memcpy(XTOPT_MKPTR(cb), cb->val.ethermac,
+ sizeof(cb->val.ethermac));
+ return;
+ out:
+ xt_params->exit_err(PARAMETER_PROBLEM, "ether");
+}
+
static void (*const xtopt_subparse[])(struct xt_option_call *) = {
[XTTYPE_UINT8] = xtopt_parse_int,
[XTTYPE_UINT16] = xtopt_parse_int,
@@ -695,6 +719,7 @@
[XTTYPE_PORTRC_NE] = xtopt_parse_mport,
[XTTYPE_PLEN] = xtopt_parse_plen,
[XTTYPE_PLENMASK] = xtopt_parse_plenmask,
+ [XTTYPE_ETHERMAC] = xtopt_parse_ethermac,
};
static const size_t xtopt_psize[] = {
@@ -721,6 +746,7 @@
[XTTYPE_PORTRC] = sizeof(uint16_t[2]),
[XTTYPE_PORTRC_NE] = sizeof(uint16_t[2]),
[XTTYPE_PLENMASK] = sizeof(union nf_inet_addr),
+ [XTTYPE_ETHERMAC] = sizeof(uint8_t[6]),
};
/**