We can use MARK target to set make value for arp packet. Signed-off-by: Gao feng <gaofeng@xxxxxxxxxxxxxx> Signed-off-by: Zhang Chunyu <zhangcy@xxxxxxxxxxxxxx> --- extensions/Makefile | 2 +- extensions/arpt_MARK.c | 119 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 120 insertions(+), 1 deletion(-) create mode 100644 extensions/arpt_MARK.c diff --git a/extensions/Makefile b/extensions/Makefile index 09b244e..0189cc9 100644 --- a/extensions/Makefile +++ b/extensions/Makefile @@ -1,6 +1,6 @@ #! /usr/bin/make -EXT_FUNC+=standard mangle CLASSIFY +EXT_FUNC+=standard mangle CLASSIFY MARK EXT_OBJS+=$(foreach T,$(EXT_FUNC), extensions/arpt_$(T).o) extensions/ebt_%.o: extensions/arpt_%.c include/arptables.h include/arptables_common.h diff --git a/extensions/arpt_MARK.c b/extensions/arpt_MARK.c new file mode 100644 index 0000000..d9aec8b --- /dev/null +++ b/extensions/arpt_MARK.c @@ -0,0 +1,119 @@ +/* + * (C) 2014 by Gao Feng <gaofeng@xxxxxxxxxxxxxx> + * + * arpt_MARK.c -- arptables extension to set mark for arp packet + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include <stdio.h> +#include <getopt.h> +#include <arptables.h> +#include <linux/netfilter/xt_mark.h> +#include <linux/netfilter/xt_MARK.h> +#include <linux/netfilter/x_tables.h> + +static void +help(void) +{ + printf( +"MARK target v%s options:\n" +"--set-mark mark : set the mark value\n", + ARPTABLES_VERSION); +} + +#define MARK_OPT 1 + +static struct option opts[] = { + { "set-mark" , required_argument, 0, MARK_OPT }, + {0} +}; + +static void +init(struct arpt_entry_target *t) +{ + struct xt_mark_tginfo2 *info = (struct xt_mark_tginfo2 *) t->data; + + info->mark = 0; +} + +static int +parse(int c, char **argv, int invert, unsigned int *flags, + const struct arpt_entry *e, + struct arpt_entry_target **t) +{ + struct xt_mark_tginfo2 *info = (struct xt_mark_tginfo2 *)(*t)->data; + int i; + + switch (c) { + case MARK_OPT: + if (sscanf(argv[optind-1], "%x", &i) != 1) { + exit_error(PARAMETER_PROBLEM, + "Bad mark value `%s'", optarg); + return 0; + } + info->mark = i; + if (*flags) + exit_error(PARAMETER_PROBLEM, + "CLASSIFY: Can't specify --set-mark twice"); + *flags = 1; + break; + default: + return 0; + } + return 1; +} + +static void final_check(unsigned int flags) +{ + if (!flags) + exit_error(PARAMETER_PROBLEM, "MARK: Parameter --set-mark is required"); +} + +static void print(const struct arpt_arp *ip, + const struct arpt_entry_target *target, int numeric) +{ + struct xt_mark_tginfo2 *info = (struct xt_mark_tginfo2 *)(target->data); + + printf("--set-mark %x ", info->mark); +} + +static void +save(const struct arpt_arp *ip, const struct arpt_entry_target *target) +{ +} + +static +struct arptables_target mark += { NULL, + "MARK", + ARPTABLES_VERSION, + ARPT_ALIGN(sizeof(struct xt_mark_tginfo2)), + ARPT_ALIGN(sizeof(struct xt_mark_tginfo2)), + 2, + &help, + &init, + &parse, + &final_check, + &print, + &save, + opts +}; + +static void _init(void) __attribute__ ((constructor)); +static void _init(void) +{ + register_target(&mark); +} -- 1.7.12.4 -- To unsubscribe from this list: send the line "unsubscribe netfilter-devel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html