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git://git.code.sf.net/p/xtables-addons/xtables-addons
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Import ipset-2.3.2a (userspace components)
This commit is contained in:
Jan Engelhardt
297
extensions/ipset/ipset_iphash.c
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297
extensions/ipset/ipset_iphash.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_iphash.h"
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#include "ip_set_jhash.h"
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#include "ipset.h"
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#define BUFLEN 30;
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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_NETMASK 0x08U
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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_iphash_create *mydata =
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(struct ip_set_req_iphash_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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mydata->netmask = 0xFFFFFFFF;
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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_iphash_create *mydata =
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(struct ip_set_req_iphash_create *) data;
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unsigned int bits;
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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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if (string_to_number(optarg, 0, 32, &bits))
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exit_error(PARAMETER_PROBLEM,
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"Invalid netmask `%s' specified", optarg);
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if (bits != 0)
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mydata->netmask = 0xFFFFFFFF << (32 - bits);
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*flags |= OPT_CREATE_NETMASK;
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DP("--netmask %x", mydata->netmask);
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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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#ifdef IPSET_DEBUG
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struct ip_set_req_iphash_create *mydata =
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(struct ip_set_req_iphash_create *) data;
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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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}
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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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{"netmask", 1, 0, '4'},
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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_iphash *mydata =
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(struct ip_set_req_iphash *) data;
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parse_ip(optarg, &mydata->ip);
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if (!mydata->ip)
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exit_error(PARAMETER_PROBLEM,
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"Zero valued IP address `%s' specified", optarg);
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return mydata->ip;
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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_iphash_create *header =
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(struct ip_set_req_iphash_create *) data;
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struct ip_set_iphash *map =
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(struct ip_set_iphash *) set->settype->header;
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memset(map, 0, sizeof(struct ip_set_iphash));
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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->netmask = header->netmask;
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}
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unsigned int
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mask_to_bits(ip_set_ip_t mask)
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{
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unsigned int bits = 32;
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ip_set_ip_t maskaddr;
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if (mask == 0xFFFFFFFF)
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return bits;
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maskaddr = 0xFFFFFFFE;
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while (--bits >= 0 && maskaddr != mask)
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maskaddr <<= 1;
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return bits;
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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_iphash *mysetdata =
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(struct ip_set_iphash *) set->settype->header;
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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", mysetdata->resize);
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if (mysetdata->netmask == 0xFFFFFFFF)
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printf("\n");
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else
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printf(" netmask: %d\n", mask_to_bits(mysetdata->netmask));
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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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size_t offset = 0;
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ip_set_ip_t *ip;
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while (offset < len) {
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ip = data + offset;
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if (*ip)
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printf("%s\n", ip_tostring(*ip, options));
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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_iphash *mysetdata =
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(struct ip_set_iphash *) set->settype->header;
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printf("-N %s %s --hashsize %u --probes %u --resize %u",
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set->name, set->settype->typename,
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mysetdata->hashsize, mysetdata->probes, mysetdata->resize);
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if (mysetdata->netmask == 0xFFFFFFFF)
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printf("\n");
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else
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printf(" --netmask %d\n", mask_to_bits(mysetdata->netmask));
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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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size_t offset = 0;
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ip_set_ip_t *ip;
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while (offset < len) {
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ip = data + offset;
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if (*ip)
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printf("-A %s %s\n", set->name,
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ip_tostring(*ip, options));
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offset += sizeof(ip_set_ip_t);
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}
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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 iphash [--hashsize hashsize] [--probes probes ]\n"
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" [--resize resize] [--netmask CIDR-netmask]\n"
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"-A set IP\n"
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"-D set IP\n"
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"-T set IP\n");
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}
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static struct settype settype_iphash = {
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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_iphash_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_iphash),
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.adt_parser = &adt_parser,
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/* Printing */
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.header_size = sizeof(struct ip_set_iphash),
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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 = &binding_ip_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)) iphash_init(void)
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{
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settype_register(&settype_iphash);
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}
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