diff options
| -rw-r--r-- | extensions/libebt_pkttype.c | 119 | ||||
| -rw-r--r-- | extensions/libebt_pkttype.txlate | 20 | ||||
| -rw-r--r-- | iptables/xtables-eb.c | 1 |
3 files changed, 140 insertions, 0 deletions
diff --git a/extensions/libebt_pkttype.c b/extensions/libebt_pkttype.c new file mode 100644 index 00000000..4e2d19de --- /dev/null +++ b/extensions/libebt_pkttype.c @@ -0,0 +1,119 @@ +/* ebt_pkttype + * + * Authors: + * Bart De Schuymer <bdschuym@pandora.be> + * + * April, 2003 + */ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <getopt.h> +#include <netdb.h> +#include <xtables.h> +#include <linux/if_packet.h> +#include <linux/netfilter_bridge/ebt_pkttype.h> + +static const char *classes[] = { + "host", + "broadcast", + "multicast", + "otherhost", + "outgoing", + "loopback", + "fastroute", +}; + +static const struct option brpkttype_opts[] = +{ + { "pkttype-type" , required_argument, 0, '1' }, + { 0 } +}; + +static void brpkttype_print_help(void) +{ + printf( +"pkttype options:\n" +"--pkttype-type [!] type: class the packet belongs to\n" +"Possible values: broadcast, multicast, host, otherhost, or any other byte value (which would be pretty useless).\n"); +} + + +static int brpkttype_parse(int c, char **argv, int invert, unsigned int *flags, + const void *entry, struct xt_entry_match **match) +{ + struct ebt_pkttype_info *ptinfo = (struct ebt_pkttype_info *)(*match)->data; + char *end; + long int i; + + switch (c) { + case '1': + if (invert) + ptinfo->invert = 1; + i = strtol(optarg, &end, 16); + if (*end != '\0') { + for (i = 0; i < ARRAY_SIZE(classes); i++) { + if (!strcasecmp(optarg, classes[i])) + break; + } + if (i >= ARRAY_SIZE(classes)) + xtables_error(PARAMETER_PROBLEM, "Could not parse class '%s'", optarg); + } + if (i < 0 || i > 255) + xtables_error(PARAMETER_PROBLEM, "Problem with specified pkttype class"); + ptinfo->pkt_type = (uint8_t)i; + break; + default: + return 0; + } + return 1; +} + + +static void brpkttype_print(const void *ip, const struct xt_entry_match *match, int numeric) +{ + struct ebt_pkttype_info *pt = (struct ebt_pkttype_info *)match->data; + + printf("--pkttype-type %s", pt->invert ? "! " : ""); + + if (pt->pkt_type < ARRAY_SIZE(classes)) + printf("%s ", classes[pt->pkt_type]); + else + printf("%d ", pt->pkt_type); +} + +static int brpkttype_xlate(struct xt_xlate *xl, + const struct xt_xlate_mt_params *params) +{ + const struct ebt_pkttype_info *info = (const void*)params->match->data; + + xt_xlate_add(xl, "meta pkttype %s", info->invert ? "!= " : ""); + + if (info->pkt_type < 3) + xt_xlate_add(xl, "%s ", classes[info->pkt_type]); + else if (info->pkt_type == 3) + xt_xlate_add(xl, "other "); + else + xt_xlate_add(xl, "%d ", info->pkt_type); + + return 1; +} + +static struct xtables_match brpkttype_match = { + .name = "pkttype", + .version = XTABLES_VERSION, + .family = NFPROTO_BRIDGE, + .size = XT_ALIGN(sizeof(struct ebt_pkttype_info)), + .userspacesize = XT_ALIGN(sizeof(struct ebt_pkttype_info)), + .help = brpkttype_print_help, + .parse = brpkttype_parse, + .print = brpkttype_print, + .xlate = brpkttype_xlate, + .extra_opts = brpkttype_opts, +}; + +void _init(void) +{ + xtables_register_match(&brpkttype_match); +} diff --git a/extensions/libebt_pkttype.txlate b/extensions/libebt_pkttype.txlate new file mode 100644 index 00000000..94d016d9 --- /dev/null +++ b/extensions/libebt_pkttype.txlate @@ -0,0 +1,20 @@ +ebtables-translate -A INPUT --pkttype-type host +nft add rule bridge filter INPUT meta pkttype host counter + +ebtables-translate -A INPUT ! --pkttype-type broadcast +nft add rule bridge filter INPUT meta pkttype != broadcast counter + +ebtables-translate -A INPUT --pkttype-type ! multicast +nft add rule bridge filter INPUT meta pkttype != multicast counter + +ebtables-translate -A INPUT --pkttype-type otherhost +nft add rule bridge filter INPUT meta pkttype other counter + +ebtables-translate -A INPUT --pkttype-type outgoing +nft add rule bridge filter INPUT meta pkttype 4 counter + +ebtables-translate -A INPUT --pkttype-type loopback +nft add rule bridge filter INPUT meta pkttype 5 counter + +ebtables-translate -A INPUT --pkttype-type fastroute +nft add rule bridge filter INPUT meta pkttype 6 counter diff --git a/iptables/xtables-eb.c b/iptables/xtables-eb.c index 449adc3d..92abd1e0 100644 --- a/iptables/xtables-eb.c +++ b/iptables/xtables-eb.c @@ -669,6 +669,7 @@ void ebt_load_match_extensions(void) ebt_load_match("ip6"); ebt_load_match("mark_m"); ebt_load_match("limit"); + ebt_load_match("pkttype"); ebt_load_watcher("log"); ebt_load_watcher("nflog"); |