mirror of
git://git.code.sf.net/p/xtables-addons/xtables-addons
synced 2025-09-05 12:16:38 +02:00
106 lines
2.7 KiB
C
106 lines
2.7 KiB
C
/*
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* PROTO Target module
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* This program is distributed under the terms of GNU GPL
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*/
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#include <stdio.h>
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#include <xtables.h>
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#include "xt_PROTO.h"
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enum {
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O_PROTO_SET = 0,
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O_PROTO_STOP_AT_FRAG = 1,
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O_PROTO_STOP_AT_AUTH = 2,
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F_PROTO_SET = 1 << O_PROTO_SET,
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F_PROTO_STOP_AT_FRAG = 1 << O_PROTO_STOP_AT_FRAG,
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F_PROTO_STOP_AT_AUTH = 1 << O_PROTO_STOP_AT_AUTH,
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};
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#define s struct xt_PROTO_info
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static const struct xt_option_entry PROTO_opts[] = {
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{.name = "proto-set", .type = XTTYPE_UINT8, .id = O_PROTO_SET,
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.flags = XTOPT_PUT | XTOPT_MAND, XTOPT_POINTER(s, proto)},
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{.name = "stop-at-frag", .type = XTTYPE_NONE, .id = O_PROTO_STOP_AT_FRAG},
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{.name = "stop-at-auth", .type = XTTYPE_NONE, .id = O_PROTO_STOP_AT_AUTH},
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XTOPT_TABLEEND,
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};
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#undef s
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static void PROTO_help(void)
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{
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printf(
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"PROTO target options\n"
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" --proto-set value Set protocol to <value 0-255>\n"
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);
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}
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static void PROTO_parse(struct xt_option_call *cb)
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{
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struct xt_PROTO_info *info = cb->data;
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xtables_option_parse(cb);
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switch (cb->entry->id) {
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case O_PROTO_SET:
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info->mode |= 1 << XT_PROTO_SET;
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break;
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case O_PROTO_STOP_AT_FRAG:
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info->mode |= 1 << XT_PROTO_STOP_AT_FRAG;
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break;
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case O_PROTO_STOP_AT_AUTH:
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info->mode |= 1 << XT_PROTO_STOP_AT_AUTH;
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break;
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}
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}
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static void PROTO_check(struct xt_fcheck_call *cb)
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{
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if (!(cb->xflags & F_PROTO_SET))
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xtables_error(PARAMETER_PROBLEM,
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"PROTO: You must specify the proto to be set");
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}
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static void PROTO_save(const void *ip, const struct xt_entry_target *target)
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{
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const struct xt_PROTO_info *info = (void *)target->data;
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if (info->mode & (1 << XT_PROTO_SET))
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printf(" --proto-set %u", info->proto);
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if (info->mode & (1 << XT_PROTO_STOP_AT_FRAG))
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printf(" --stop-at-frag");
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if (info->mode & (1 << XT_PROTO_STOP_AT_AUTH))
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printf(" --stop-at-auth");
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}
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static void PROTO_print(const void *ip, const struct xt_entry_target *target,
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int numeric)
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{
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const struct xt_PROTO_info *info = (void *)target->data;
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printf(" PROTO ");
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if (info->mode & (1 << XT_PROTO_SET))
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printf("set to %u", info->proto);
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if (info->mode & (1 << XT_PROTO_STOP_AT_FRAG))
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printf(" stop-at-frag");
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if (info->mode & (1 << XT_PROTO_STOP_AT_AUTH))
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printf(" stop-at-auth");
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}
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static struct xtables_target proto_tg_reg = {
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.name = "PROTO",
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.version = XTABLES_VERSION,
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.family = NFPROTO_UNSPEC,
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.size = XT_ALIGN(sizeof(struct xt_PROTO_info)),
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.userspacesize = XT_ALIGN(sizeof(struct xt_PROTO_info)),
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.help = PROTO_help,
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.print = PROTO_print,
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.save = PROTO_save,
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.x6_parse = PROTO_parse,
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.x6_fcheck = PROTO_check,
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.x6_options = PROTO_opts,
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};
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static __attribute__((constructor)) void _init(void)
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{
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xtables_register_target(&proto_tg_reg);
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}
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