X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=ipset%2Fipset_iphash.c;fp=ipset%2Fipset_iphash.c;h=3272e6e49ee87082f2c97a6bc37ab7601e70f371;hb=3bbf6cde0b81310fdef47ebead675dfa6d346f8b;hp=0000000000000000000000000000000000000000;hpb=6afea0b41dfbc3824956d11d960ad80097218feb;p=iptables.git diff --git a/ipset/ipset_iphash.c b/ipset/ipset_iphash.c new file mode 100644 index 0000000..3272e6e --- /dev/null +++ b/ipset/ipset_iphash.c @@ -0,0 +1,297 @@ +/* Copyright 2004 Jozsef Kadlecsik (kadlec@blackhole.kfki.hu) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#include "ipset.h" + +#define BUFLEN 30; + +#define OPT_CREATE_HASHSIZE 0x01U +#define OPT_CREATE_PROBES 0x02U +#define OPT_CREATE_RESIZE 0x04U +#define OPT_CREATE_NETMASK 0x08U + +/* Initialize the create. */ +void create_init(void *data) +{ + struct ip_set_req_iphash_create *mydata = + (struct ip_set_req_iphash_create *) data; + + DP("create INIT"); + + /* Default create parameters */ + mydata->hashsize = 1024; + mydata->probes = 8; + mydata->resize = 50; + + mydata->netmask = 0xFFFFFFFF; +} + +/* Function which parses command options; returns true if it ate an option */ +int create_parse(int c, char *argv[], void *data, unsigned *flags) +{ + struct ip_set_req_iphash_create *mydata = + (struct ip_set_req_iphash_create *) data; + unsigned int bits; + ip_set_ip_t value; + + DP("create_parse"); + + switch (c) { + case '1': + + if (string_to_number(optarg, 1, UINT_MAX - 1, &mydata->hashsize)) + exit_error(PARAMETER_PROBLEM, "Invalid hashsize `%s' specified", optarg); + + *flags |= OPT_CREATE_HASHSIZE; + + DP("--hashsize %u", mydata->hashsize); + + break; + + case '2': + + if (string_to_number(optarg, 1, 65535, &value)) + exit_error(PARAMETER_PROBLEM, "Invalid probes `%s' specified", optarg); + + mydata->probes = value; + *flags |= OPT_CREATE_PROBES; + + DP("--probes %u", mydata->probes); + + break; + + case '3': + + if (string_to_number(optarg, 0, 65535, &value)) + exit_error(PARAMETER_PROBLEM, "Invalid resize `%s' specified", optarg); + + mydata->resize = value; + *flags |= OPT_CREATE_RESIZE; + + DP("--resize %u", mydata->resize); + + break; + + case '4': + + if (string_to_number(optarg, 0, 32, &bits)) + exit_error(PARAMETER_PROBLEM, + "Invalid netmask `%s' specified", optarg); + + if (bits != 0) + mydata->netmask = 0xFFFFFFFF << (32 - bits); + + *flags |= OPT_CREATE_NETMASK; + + DP("--netmask %x", mydata->netmask); + + break; + + default: + return 0; + } + + return 1; +} + +/* Final check; exit if not ok. */ +void create_final(void *data, unsigned int flags) +{ +#ifdef IPSET_DEBUG + struct ip_set_req_iphash_create *mydata = + (struct ip_set_req_iphash_create *) data; + + DP("hashsize %u probes %u resize %u", + mydata->hashsize, mydata->probes, mydata->resize); +#endif +} + +/* Create commandline options */ +static struct option create_opts[] = { + {"hashsize", 1, 0, '1'}, + {"probes", 1, 0, '2'}, + {"resize", 1, 0, '3'}, + {"netmask", 1, 0, '4'}, + {0} +}; + +/* Add, del, test parser */ +ip_set_ip_t adt_parser(unsigned cmd, const char *optarg, void *data) +{ + struct ip_set_req_iphash *mydata = + (struct ip_set_req_iphash *) data; + + parse_ip(optarg, &mydata->ip); + if (!mydata->ip) + exit_error(PARAMETER_PROBLEM, + "Zero valued IP address `%s' specified", optarg); + + return mydata->ip; +}; + +/* + * Print and save + */ + +void initheader(struct set *set, const void *data) +{ + struct ip_set_req_iphash_create *header = + (struct ip_set_req_iphash_create *) data; + struct ip_set_iphash *map = + (struct ip_set_iphash *) set->settype->header; + + memset(map, 0, sizeof(struct ip_set_iphash)); + map->hashsize = header->hashsize; + map->probes = header->probes; + map->resize = header->resize; + map->netmask = header->netmask; +} + +unsigned int +mask_to_bits(ip_set_ip_t mask) +{ + unsigned int bits = 32; + ip_set_ip_t maskaddr; + + if (mask == 0xFFFFFFFF) + return bits; + + maskaddr = 0xFFFFFFFE; + while (--bits >= 0 && maskaddr != mask) + maskaddr <<= 1; + + return bits; +} + +void printheader(struct set *set, unsigned options) +{ + struct ip_set_iphash *mysetdata = + (struct ip_set_iphash *) set->settype->header; + + printf(" hashsize: %u", mysetdata->hashsize); + printf(" probes: %u", mysetdata->probes); + printf(" resize: %u", mysetdata->resize); + if (mysetdata->netmask == 0xFFFFFFFF) + printf("\n"); + else + printf(" netmask: %d\n", mask_to_bits(mysetdata->netmask)); +} + +void printips(struct set *set, void *data, size_t len, unsigned options) +{ + size_t offset = 0; + ip_set_ip_t *ip; + + while (offset < len) { + ip = data + offset; + if (*ip) + printf("%s\n", ip_tostring(*ip, options)); + offset += sizeof(ip_set_ip_t); + } +} + +void saveheader(struct set *set, unsigned options) +{ + struct ip_set_iphash *mysetdata = + (struct ip_set_iphash *) set->settype->header; + + printf("-N %s %s --hashsize %u --probes %u --resize %u", + set->name, set->settype->typename, + mysetdata->hashsize, mysetdata->probes, mysetdata->resize); + if (mysetdata->netmask == 0xFFFFFFFF) + printf("\n"); + else + printf(" --netmask %d\n", mask_to_bits(mysetdata->netmask)); +} + +/* Print save for an IP */ +void saveips(struct set *set, void *data, size_t len, unsigned options) +{ + size_t offset = 0; + ip_set_ip_t *ip; + + while (offset < len) { + ip = data + offset; + if (*ip) + printf("-A %s %s\n", set->name, + ip_tostring(*ip, options)); + offset += sizeof(ip_set_ip_t); + } +} + +void usage(void) +{ + printf + ("-N set iphash [--hashsize hashsize] [--probes probes ]\n" + " [--resize resize] [--netmask CIDR-netmask]\n" + "-A set IP\n" + "-D set IP\n" + "-T set IP\n"); +} + +static struct settype settype_iphash = { + .typename = SETTYPE_NAME, + .protocol_version = IP_SET_PROTOCOL_VERSION, + + /* Create */ + .create_size = sizeof(struct ip_set_req_iphash_create), + .create_init = &create_init, + .create_parse = &create_parse, + .create_final = &create_final, + .create_opts = create_opts, + + /* Add/del/test */ + .adt_size = sizeof(struct ip_set_req_iphash), + .adt_parser = &adt_parser, + + /* Printing */ + .header_size = sizeof(struct ip_set_iphash), + .initheader = &initheader, + .printheader = &printheader, + .printips = &printips, /* We only have the unsorted version */ + .printips_sorted = &printips, + .saveheader = &saveheader, + .saveips = &saveips, + + /* Bindings */ + .bindip_tostring = &binding_ip_tostring, + .bindip_parse = &parse_ip, + + .usage = &usage, +}; + +void _init(void) +{ + settype_register(&settype_iphash); + +}