diff options
| author | Phil Sutter <phil@nwl.cc> | 2023-12-17 15:10:15 +0100 |
|---|---|---|
| committer | Phil Sutter <phil@nwl.cc> | 2024-01-10 16:07:30 +0100 |
| commit | 810f8568f44f5863c2350a39f4f5c8d60f762958 (patch) | |
| tree | 06fcabcc577f937d22e090be877cf527753dc127 | |
| parent | 122300a6fff9892b697f8900a7f84e94bac151ee (diff) | |
libxtables: xtoptions: Implement XTTYPE_ETHERMACMASK
Accept an Ethernet MAC address with optional mask in the format
xtables_parse_mac_and_mask() expects it. Does not support XTOPT_PUT (for
now) due to the lack of defined data structure.
| -rw-r--r-- | include/xtables.h | 7 | ||||
| -rw-r--r-- | libxtables/xtoptions.c | 10 |
2 files changed, 16 insertions, 1 deletions
diff --git a/include/xtables.h b/include/xtables.h index db7c492a..ab856ebc 100644 --- a/include/xtables.h +++ b/include/xtables.h @@ -12,6 +12,7 @@ #include <stdbool.h> #include <stddef.h> #include <stdint.h> +#include <netinet/ether.h> #include <netinet/in.h> #include <net/if.h> #include <linux/types.h> @@ -68,6 +69,7 @@ struct in_addr; * %XTTYPE_PLEN: prefix length * %XTTYPE_PLENMASK: prefix length (ptr: union nf_inet_addr) * %XTTYPE_ETHERMAC: Ethernet MAC address in hex form + * %XTTYPE_ETHERMACMASK: Ethernet MAC address in hex form with optional mask */ enum xt_option_type { XTTYPE_NONE, @@ -92,6 +94,7 @@ enum xt_option_type { XTTYPE_PLEN, XTTYPE_PLENMASK, XTTYPE_ETHERMAC, + XTTYPE_ETHERMACMASK, }; /** @@ -167,7 +170,9 @@ struct xt_option_call { struct { uint32_t mark, mask; }; - uint8_t ethermac[6]; + struct { + uint8_t ethermac[ETH_ALEN], ethermacmask[ETH_ALEN]; + }; } val; /* Wished for a world where the ones below were gone: */ union { diff --git a/libxtables/xtoptions.c b/libxtables/xtoptions.c index 5a432ea1..7a0e44b3 100644 --- a/libxtables/xtoptions.c +++ b/libxtables/xtoptions.c @@ -791,6 +791,15 @@ static void xtopt_parse_ethermac(struct xt_option_call *cb) xt_params->exit_err(PARAMETER_PROBLEM, "Invalid MAC address specified."); } +static void xtopt_parse_ethermacmask(struct xt_option_call *cb) +{ + memset(cb->val.ethermacmask, 0xff, ETH_ALEN); + if (xtables_parse_mac_and_mask(cb->arg, cb->val.ethermac, + cb->val.ethermacmask)) + xt_params->exit_err(PARAMETER_PROBLEM, + "Invalid MAC/mask address specified."); +} + static void (*const xtopt_subparse[])(struct xt_option_call *) = { [XTTYPE_UINT8] = xtopt_parse_int, [XTTYPE_UINT16] = xtopt_parse_int, @@ -813,6 +822,7 @@ static void (*const xtopt_subparse[])(struct xt_option_call *) = { [XTTYPE_PLEN] = xtopt_parse_plen, [XTTYPE_PLENMASK] = xtopt_parse_plenmask, [XTTYPE_ETHERMAC] = xtopt_parse_ethermac, + [XTTYPE_ETHERMACMASK]= xtopt_parse_ethermacmask, }; /** |