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git://git.code.sf.net/p/xtables-addons/xtables-addons
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IPMARK: import 20080304 code base
With truly minimal changes to make it compile.
This commit is contained in:
Jan Engelhardt
159
extensions/libxt_IPMARK.c
Normal file
159
extensions/libxt_IPMARK.c
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@@ -0,0 +1,159 @@
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/* Shared library add-on to iptables to add IPMARK target support.
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* (C) 2003 by Grzegorz Janoszka <Grzegorz.Janoszka@pro.onet.pl>
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*
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* based on original MARK target
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*
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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 <string.h>
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#include <stdlib.h>
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#include <getopt.h>
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#include <xtables.h>
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#include "xt_IPMARK.h"
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#define IPT_ADDR_USED 1
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#define IPT_AND_MASK_USED 2
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#define IPT_OR_MASK_USED 4
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/* Function which prints out usage message. */
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static void
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help(void)
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{
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printf(
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"IPMARK target options:\n"
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" --addr src/dst use source or destination ip address\n"
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" --and-mask value logical AND ip address with this value becomes MARK\n"
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" --or-mask value logical OR ip address with this value becomes MARK\n"
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"\n");
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}
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static struct option opts[] = {
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{ "addr", 1, 0, '1' },
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{ "and-mask", 1, 0, '2' },
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{ "or-mask", 1, 0, '3' },
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{ 0 }
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};
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/* Initialize the target. */
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static void
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init(struct xt_entry_target *t)
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{
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struct ipt_ipmark_target_info *ipmarkinfo =
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(struct ipt_ipmark_target_info *)t->data;
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ipmarkinfo->andmask=0xffffffff;
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ipmarkinfo->ormask=0;
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}
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/* Function which parses command options; returns true if it
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ate an option */
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static int
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parse(int c, char **argv, int invert, unsigned int *flags,
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const void *entry, struct xt_entry_target **target)
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{
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struct ipt_ipmark_target_info *ipmarkinfo
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= (struct ipt_ipmark_target_info *)(*target)->data;
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switch (c) {
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char *end;
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case '1':
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if(!strcmp(optarg, "src")) ipmarkinfo->addr=IPT_IPMARK_SRC;
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else if(!strcmp(optarg, "dst")) ipmarkinfo->addr=IPT_IPMARK_DST;
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else exit_error(PARAMETER_PROBLEM, "Bad addr value `%s' - should be `src' or `dst'", optarg);
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if (*flags & IPT_ADDR_USED)
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exit_error(PARAMETER_PROBLEM,
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"IPMARK target: Can't specify --addr twice");
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*flags |= IPT_ADDR_USED;
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break;
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case '2':
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ipmarkinfo->andmask = strtoul(optarg, &end, 0);
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if (*end != '\0' || end == optarg)
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exit_error(PARAMETER_PROBLEM, "Bad and-mask value `%s'", optarg);
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if (*flags & IPT_AND_MASK_USED)
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exit_error(PARAMETER_PROBLEM,
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"IPMARK target: Can't specify --and-mask twice");
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*flags |= IPT_AND_MASK_USED;
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break;
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case '3':
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ipmarkinfo->ormask = strtoul(optarg, &end, 0);
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if (*end != '\0' || end == optarg)
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exit_error(PARAMETER_PROBLEM, "Bad or-mask value `%s'", optarg);
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if (*flags & IPT_OR_MASK_USED)
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exit_error(PARAMETER_PROBLEM,
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"IPMARK target: Can't specify --or-mask twice");
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*flags |= IPT_OR_MASK_USED;
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break;
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default:
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return 0;
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}
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return 1;
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}
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static void
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final_check(unsigned int flags)
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{
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if (!(flags & IPT_ADDR_USED))
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exit_error(PARAMETER_PROBLEM,
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"IPMARK target: Parameter --addr is required");
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if (!(flags & (IPT_AND_MASK_USED | IPT_OR_MASK_USED)))
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exit_error(PARAMETER_PROBLEM,
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"IPMARK target: Parameter --and-mask or --or-mask is required");
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}
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/* Prints out the targinfo. */
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static void
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print(const void *entry, const struct xt_entry_target *target,
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int numeric)
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{
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const struct ipt_ipmark_target_info *ipmarkinfo =
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(const struct ipt_ipmark_target_info *)target->data;
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if(ipmarkinfo->addr == IPT_IPMARK_SRC)
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printf("IPMARK src");
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else
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printf("IPMARK dst");
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printf(" ip and 0x%lx or 0x%lx", ipmarkinfo->andmask, ipmarkinfo->ormask);
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}
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/* Saves the union ipt_targinfo in parsable form to stdout. */
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static void
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save(const void *entry, const struct xt_entry_target *target)
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{
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const struct ipt_ipmark_target_info *ipmarkinfo =
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(const struct ipt_ipmark_target_info *)target->data;
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if(ipmarkinfo->addr == IPT_IPMARK_SRC)
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printf("--addr=src ");
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else
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printf("--addr=dst ");
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if(ipmarkinfo->andmask != 0xffffffff)
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printf("--and-mask 0x%lx ", ipmarkinfo->andmask);
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if(ipmarkinfo->ormask != 0)
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printf("--or-mask 0x%lx ", ipmarkinfo->ormask);
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}
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static struct xtables_target ipmark = {
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.next = NULL,
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.name = "IPMARK",
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.version = XTABLES_VERSION,
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.size = XT_ALIGN(sizeof(struct ipt_ipmark_target_info)),
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.userspacesize = XT_ALIGN(sizeof(struct ipt_ipmark_target_info)),
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.help = &help,
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.init = &init,
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.parse = &parse,
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.final_check = &final_check,
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.print = &print,
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.save = &save,
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.extra_opts = opts
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};
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void _init(void)
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{
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xtables_register_target(&ipmark);
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}
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