mirror of
git://git.code.sf.net/p/xtables-addons/xtables-addons
synced 2025-09-20 11:34:57 +02:00
Import ipset-2.3.2a (userspace components)
This commit is contained in:
Jan Engelhardt
373
extensions/ipset/ipset_ipporthash.c
Normal file
373
extensions/ipset/ipset_ipporthash.c
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/* Copyright 2004 Jozsef Kadlecsik (kadlec@blackhole.kfki.hu)
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <errno.h>
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#include <limits.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <time.h>
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#include <sys/socket.h>
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#include <sys/types.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <asm/types.h>
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#include "ip_set_ipporthash.h"
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#include "ip_set_jhash.h"
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#include "ipset.h"
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#define OPT_CREATE_HASHSIZE 0x01U
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#define OPT_CREATE_PROBES 0x02U
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#define OPT_CREATE_RESIZE 0x04U
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#define OPT_CREATE_NETWORK 0x08U
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#define OPT_CREATE_FROM 0x10U
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#define OPT_CREATE_TO 0x20U
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/* Initialize the create. */
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void create_init(void *data)
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{
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struct ip_set_req_ipporthash_create *mydata =
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(struct ip_set_req_ipporthash_create *) data;
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DP("create INIT");
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/* Default create parameters */
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mydata->hashsize = 1024;
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mydata->probes = 8;
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mydata->resize = 50;
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}
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/* Function which parses command options; returns true if it ate an option */
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int create_parse(int c, char *argv[], void *data, unsigned *flags)
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{
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struct ip_set_req_ipporthash_create *mydata =
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(struct ip_set_req_ipporthash_create *) data;
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ip_set_ip_t value;
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DP("create_parse");
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switch (c) {
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case '1':
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if (string_to_number(optarg, 1, UINT_MAX - 1, &mydata->hashsize))
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exit_error(PARAMETER_PROBLEM, "Invalid hashsize `%s' specified", optarg);
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*flags |= OPT_CREATE_HASHSIZE;
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DP("--hashsize %u", mydata->hashsize);
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break;
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case '2':
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if (string_to_number(optarg, 1, 65535, &value))
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exit_error(PARAMETER_PROBLEM, "Invalid probes `%s' specified", optarg);
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mydata->probes = value;
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*flags |= OPT_CREATE_PROBES;
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DP("--probes %u", mydata->probes);
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break;
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case '3':
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if (string_to_number(optarg, 0, 65535, &value))
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exit_error(PARAMETER_PROBLEM, "Invalid resize `%s' specified", optarg);
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mydata->resize = value;
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*flags |= OPT_CREATE_RESIZE;
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DP("--resize %u", mydata->resize);
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break;
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case '4':
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parse_ip(optarg, &mydata->from);
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*flags |= OPT_CREATE_FROM;
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DP("--from %x (%s)", mydata->from,
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ip_tostring_numeric(mydata->from));
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break;
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case '5':
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parse_ip(optarg, &mydata->to);
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*flags |= OPT_CREATE_TO;
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DP("--to %x (%s)", mydata->to,
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ip_tostring_numeric(mydata->to));
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break;
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case '6':
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parse_ipandmask(optarg, &mydata->from, &mydata->to);
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/* Make to the last of from + mask */
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if (mydata->to)
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mydata->to = mydata->from | ~(mydata->to);
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else {
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mydata->from = 0x00000000;
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mydata->to = 0xFFFFFFFF;
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}
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*flags |= OPT_CREATE_NETWORK;
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DP("--network from %x (%s)",
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mydata->from, ip_tostring_numeric(mydata->from));
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DP("--network to %x (%s)",
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mydata->to, ip_tostring_numeric(mydata->to));
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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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/* Final check; exit if not ok. */
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void create_final(void *data, unsigned int flags)
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{
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struct ip_set_req_ipporthash_create *mydata =
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(struct ip_set_req_ipporthash_create *) data;
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#ifdef IPSET_DEBUG
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DP("hashsize %u probes %u resize %u",
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mydata->hashsize, mydata->probes, mydata->resize);
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#endif
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if (flags & OPT_CREATE_NETWORK) {
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/* --network */
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if ((flags & OPT_CREATE_FROM) || (flags & OPT_CREATE_TO))
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exit_error(PARAMETER_PROBLEM,
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"Can't specify --from or --to with --network\n");
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} else if (flags & (OPT_CREATE_FROM | OPT_CREATE_TO)) {
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/* --from --to */
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if (!(flags & OPT_CREATE_FROM) || !(flags & OPT_CREATE_TO))
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exit_error(PARAMETER_PROBLEM,
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"Need to specify both --from and --to\n");
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} else {
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exit_error(PARAMETER_PROBLEM,
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"Need to specify --from and --to, or --network\n");
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}
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DP("from : %x to: %x diff: %x",
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mydata->from, mydata->to,
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mydata->to - mydata->from);
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if (mydata->from > mydata->to)
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exit_error(PARAMETER_PROBLEM,
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"From can't be higher than to.\n");
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if (mydata->to - mydata->from > MAX_RANGE)
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exit_error(PARAMETER_PROBLEM,
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"Range too large. Max is %d IPs in range\n",
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MAX_RANGE+1);
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}
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/* Create commandline options */
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static struct option create_opts[] = {
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{"hashsize", 1, 0, '1'},
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{"probes", 1, 0, '2'},
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{"resize", 1, 0, '3'},
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{"from", 1, 0, '4'},
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{"to", 1, 0, '5'},
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{"network", 1, 0, '6'},
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{0}
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};
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/* Add, del, test parser */
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ip_set_ip_t adt_parser(unsigned cmd, const char *optarg, void *data)
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{
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struct ip_set_req_ipporthash *mydata =
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(struct ip_set_req_ipporthash *) data;
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char *saved = ipset_strdup(optarg);
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char *ptr, *tmp = saved;
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DP("ipporthash: %p %p", optarg, data);
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ptr = strsep(&tmp, ":%");
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parse_ip(ptr, &mydata->ip);
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if (tmp)
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parse_port(tmp, &mydata->port);
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else
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exit_error(PARAMETER_PROBLEM,
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"IP address and port must be specified: ip%%port");
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free(saved);
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return 1;
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};
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/*
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* Print and save
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*/
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void initheader(struct set *set, const void *data)
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{
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struct ip_set_req_ipporthash_create *header =
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(struct ip_set_req_ipporthash_create *) data;
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struct ip_set_ipporthash *map =
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(struct ip_set_ipporthash *) set->settype->header;
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memset(map, 0, sizeof(struct ip_set_ipporthash));
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map->hashsize = header->hashsize;
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map->probes = header->probes;
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map->resize = header->resize;
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map->first_ip = header->from;
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map->last_ip = header->to;
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}
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void printheader(struct set *set, unsigned options)
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{
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struct ip_set_ipporthash *mysetdata =
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(struct ip_set_ipporthash *) set->settype->header;
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printf(" from: %s", ip_tostring(mysetdata->first_ip, options));
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printf(" to: %s", ip_tostring(mysetdata->last_ip, options));
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printf(" hashsize: %u", mysetdata->hashsize);
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printf(" probes: %u", mysetdata->probes);
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printf(" resize: %u\n", mysetdata->resize);
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}
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void printips(struct set *set, void *data, size_t len, unsigned options)
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{
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struct ip_set_ipporthash *mysetdata =
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(struct ip_set_ipporthash *) set->settype->header;
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size_t offset = 0;
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ip_set_ip_t *ipptr, ip;
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uint16_t port;
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while (offset < len) {
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ipptr = data + offset;
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if (*ipptr) {
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ip = (*ipptr>>16) + mysetdata->first_ip;
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port = (uint16_t) *ipptr;
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printf("%s:%s\n",
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ip_tostring(ip, options),
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port_tostring(port, options));
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}
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offset += sizeof(ip_set_ip_t);
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}
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}
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void saveheader(struct set *set, unsigned options)
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{
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struct ip_set_ipporthash *mysetdata =
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(struct ip_set_ipporthash *) set->settype->header;
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printf("-N %s %s --from %s",
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set->name, set->settype->typename,
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ip_tostring(mysetdata->first_ip, options));
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printf(" --to %s",
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ip_tostring(mysetdata->last_ip, options));
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printf(" --hashsize %u --probes %u --resize %u\n",
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mysetdata->hashsize, mysetdata->probes, mysetdata->resize);
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}
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/* Print save for an IP */
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void saveips(struct set *set, void *data, size_t len, unsigned options)
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{
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struct ip_set_ipporthash *mysetdata =
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(struct ip_set_ipporthash *) set->settype->header;
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size_t offset = 0;
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ip_set_ip_t *ipptr, ip;
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uint16_t port;
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while (offset < len) {
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ipptr = data + offset;
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if (*ipptr) {
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ip = (*ipptr>>16) + mysetdata->first_ip;
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port = (uint16_t) *ipptr;
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printf("-A %s %s:%s\n", set->name,
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ip_tostring(ip, options),
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port_tostring(port, options));
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}
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offset += sizeof(ip_set_ip_t);
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}
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}
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static char buffer[22];
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static char * unpack_ipport_tostring(struct set *set, ip_set_ip_t bip, unsigned options)
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{
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struct ip_set_ipporthash *mysetdata =
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(struct ip_set_ipporthash *) set->settype->header;
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ip_set_ip_t ip, port;
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ip = (bip>>16) + mysetdata->first_ip;
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port = (uint16_t) bip;
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sprintf(buffer, "%s:%s",
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ip_tostring(ip, options), port_tostring(port, options));
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return buffer;
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}
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void usage(void)
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{
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printf
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("-N set ipporthash --from IP --to IP\n"
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" [--hashsize hashsize] [--probes probes ] [--resize resize]\n"
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"-N set ipporthash --network IP/mask\n"
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" [--hashsize hashsize] [--probes probes ] [--resize resize]\n"
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"-A set IP:port\n"
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"-D set IP:port\n"
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"-T set IP:port\n");
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}
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static struct settype settype_ipporthash = {
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.typename = SETTYPE_NAME,
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.protocol_version = IP_SET_PROTOCOL_VERSION,
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/* Create */
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.create_size = sizeof(struct ip_set_req_ipporthash_create),
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.create_init = &create_init,
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.create_parse = &create_parse,
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.create_final = &create_final,
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.create_opts = create_opts,
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/* Add/del/test */
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.adt_size = sizeof(struct ip_set_req_ipporthash),
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.adt_parser = &adt_parser,
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/* Printing */
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.header_size = sizeof(struct ip_set_ipporthash),
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.initheader = &initheader,
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.printheader = &printheader,
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.printips = &printips, /* We only have the unsorted version */
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.printips_sorted = &printips,
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.saveheader = &saveheader,
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.saveips = &saveips,
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/* Bindings */
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.bindip_tostring = &unpack_ipport_tostring,
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.bindip_parse = &parse_ip,
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.usage = &usage,
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};
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static __attribute__((constructor)) void ipporthash_init(void)
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{
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settype_register(&settype_ipporthash);
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}
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