#include <stdio.h>
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#include <xtables.h>
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#include <linux/netfilter/xt_cpu.h>
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enum {
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O_CPU = 0,
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};
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static void cpu_help(void)
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{
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printf(
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"cpu match options:\n"
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"[!] --cpu number Match CPU number\n");
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}
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static const struct xt_option_entry cpu_opts[] = {
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{.name = "cpu", .id = O_CPU, .type = XTTYPE_UINT32,
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.flags = XTOPT_INVERT | XTOPT_MAND | XTOPT_PUT,
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XTOPT_POINTER(struct xt_cpu_info, cpu)},
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XTOPT_TABLEEND,
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};
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static void cpu_parse(struct xt_option_call *cb)
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{
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struct xt_cpu_info *cpuinfo = cb->data;
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xtables_option_parse(cb);
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if (cb->invert)
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cpuinfo->invert = true;
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}
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static void
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cpu_print(const void *ip, const struct xt_entry_match *match, int numeric)
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{
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const struct xt_cpu_info *info = (void *)match->data;
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printf(" cpu %s%u", info->invert ? "! ":"", info->cpu);
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}
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static void cpu_save(const void *ip, const struct xt_entry_match *match)
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{
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const struct xt_cpu_info *info = (void *)match->data;
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printf("%s --cpu %u", info->invert ? " !" : "", info->cpu);
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}
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static int cpu_xlate(struct xt_xlate *xl,
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const struct xt_xlate_mt_params *params)
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{
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const struct xt_cpu_info *info = (void *)params->match->data;
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xt_xlate_add(xl, "cpu%s %u", info->invert ? " !=" : "", info->cpu);
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return 1;
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}
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static struct xtables_match cpu_match = {
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.family = NFPROTO_UNSPEC,
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.name = "cpu",
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.version = XTABLES_VERSION,
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.size = XT_ALIGN(sizeof(struct xt_cpu_info)),
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.userspacesize = XT_ALIGN(sizeof(struct xt_cpu_info)),
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.help = cpu_help,
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.print = cpu_print,
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.save = cpu_save,
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.x6_parse = cpu_parse,
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.x6_options = cpu_opts,
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.xlate = cpu_xlate,
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};
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void _init(void)
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{
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xtables_register_match(&cpu_match);
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}
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