From 2c3e49def40b41677182fc9243128f11c5e148e9 Mon Sep 17 00:00:00 2001 From: kadlec Date: Mon, 9 Feb 2004 13:47:01 +0000 Subject: Userspace part of sets: ipset added (JK) --- ipset_ipmap.c | 384 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 384 insertions(+) create mode 100644 ipset_ipmap.c (limited to 'ipset_ipmap.c') diff --git a/ipset_ipmap.c b/ipset_ipmap.c new file mode 100644 index 0000000..df03a14 --- /dev/null +++ b/ipset_ipmap.c @@ -0,0 +1,384 @@ +/* Copyright 2000-2004 Joakim Axelsson (gozem@linux.nu) + * Patrick Schaaf (bof@bof.de) + * 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 "ipset.h" + +#define BUFLEN 30; + +#define OPT_CREATE_FROM 0x01U +#define OPT_CREATE_TO 0x02U +#define OPT_CREATE_NETWORK 0x04U +#define OPT_CREATE_NETMASK 0x08U + +#define OPT_ADDDEL_IP 0x01U + +/* Initialize the create. */ +void create_init(void *data) +{ + struct ip_set_req_ipmap_create *mydata = + (struct ip_set_req_ipmap_create *) data; + + DP("create INIT"); + 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_ipmap_create *mydata = + (struct ip_set_req_ipmap_create *) data; + unsigned int bits; + + DP("create_parse"); + + switch (c) { + case '1': + parse_ip(optarg, &mydata->from); + + *flags |= OPT_CREATE_FROM; + + DP("--from %x (%s)", mydata->from, + ip_tostring(mydata->from, 0)); + + break; + + case '2': + parse_ip(optarg, &mydata->to); + + *flags |= OPT_CREATE_TO; + + DP("--to %x (%s)", mydata->to, ip_tostring(mydata->to, 0)); + + break; + + case '3': + parse_ipandmask(optarg, &mydata->from, &mydata->to); + + /* Make to the last of from + mask */ + mydata->to = mydata->from | ~(mydata->to); + + *flags |= OPT_CREATE_NETWORK; + + DP("--network from %x (%s)", mydata->from, + ip_tostring(mydata->from, 0)); + DP("--network to %x (%s)", mydata->to, + ip_tostring(mydata->to, 0)); + + 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) +{ + struct ip_set_req_ipmap_create *mydata = + (struct ip_set_req_ipmap_create *) data; + + if (flags == 0) + exit_error(PARAMETER_PROBLEM, + "Need to specify --from and --to, or --network\n"); + + if (flags & OPT_CREATE_NETWORK) { + /* --network */ + if ((flags & OPT_CREATE_FROM) || (flags & OPT_CREATE_TO)) + exit_error(PARAMETER_PROBLEM, + "Can't specify --from or --to with --network\n"); + } else { + /* --from --to */ + if ((flags & OPT_CREATE_FROM) == 0 + || (flags & OPT_CREATE_TO) == 0) + exit_error(PARAMETER_PROBLEM, + "Need to specify both --from and --to\n"); + } + + DP("from : %x to: %x diff: %d", mydata->from, mydata->to, + mydata->to - mydata->from); + + if (mydata->from > mydata->to) + exit_error(PARAMETER_PROBLEM, + "From can't be lower than to.\n", MAX_RANGE); + + if (mydata->to - mydata->from > MAX_RANGE) + exit_error(PARAMETER_PROBLEM, + "Range to large. Max is %d IPs in range\n", + MAX_RANGE); + if (flags & OPT_CREATE_NETMASK) { + unsigned int mask_bits, netmask_bits; + ip_set_ip_t mask; + + if ((mydata->from & mydata->netmask) != mydata->from) + exit_error(PARAMETER_PROBLEM, + "%s is not a network address according to netmask %d\n", + ip_tostring(mydata->from, 0), + mask_to_bits(mydata->netmask)); + + mask = range_to_mask(mydata->from, mydata->to, &mask_bits); + if (!mask) + exit_error(PARAMETER_PROBLEM, + "%s-%s is not a full network\n", + ip_tostring(mydata->from, 0), + ip_tostring(mydata->to, 0)); + + netmask_bits = mask_to_bits(mydata->netmask); + + if (netmask_bits <= mask_bits) + exit_error(PARAMETER_PROBLEM, + "%d netmask specifies larger or equal netblock than %s-%s\n", + netmask_bits, + ip_tostring(mydata->from, 0), + ip_tostring(mydata->to, 0)); + } +} + +/* Create commandline options */ +static struct option create_opts[] = { + {"from", 1, 0, '1'}, + {"to", 1, 0, '2'}, + {"network", 1, 0, '3'}, + {"netmask", 1, 0, '4'}, + {0} +}; + +/* Add, del, test parser */ +ip_set_ip_t adt_parser(int cmd, const char *optarg, + void *data, const void *setdata) +{ + struct ip_set_req_ipmap *mydata = + (struct ip_set_req_ipmap *) data; + struct ip_set_ipmap *mysetdata = + (struct ip_set_ipmap *) setdata; + + DP("ipmap: %p %p", data, setdata); + + parse_ip(optarg, &mydata->ip); + + DP("from %s", ip_tostring(mysetdata->first_ip, 0)); + DP("to %s", ip_tostring(mysetdata->last_ip, 0)); + DP("ip %s", ip_tostring(mydata->ip, 0)); + + if (mydata->ip < mysetdata->first_ip || + mydata->ip > mysetdata->last_ip) + exit_error(PARAMETER_PROBLEM, "IP '%s' is out of range\n", + ip_tostring(mydata->ip, 0)); + + return mydata->ip; +} + +ip_set_ip_t getipbyid(const void *setdata, ip_set_ip_t id) +{ + struct ip_set_ipmap *mysetdata = + (struct ip_set_ipmap *) setdata; + + return (mysetdata->first_ip + id * mysetdata->hosts); +} + +ip_set_ip_t sizeid(const void *setdata) +{ + struct ip_set_ipmap *mysetdata = + (struct ip_set_ipmap *) setdata; + + return (mysetdata->sizeid); +} + +void initheader(void **setdata, void *data, size_t len) +{ + struct ip_set_req_ipmap_create *header = + (struct ip_set_req_ipmap_create *) data; + struct ip_set_ipmap *map; + + DP("ipmap: initheader() 1"); + + if (len != sizeof(struct ip_set_req_ipmap_create)) + exit_error(OTHER_PROBLEM, + "Ipmap: incorrect size of header. " + "Got %d, wanted %d.", len, + sizeof(struct ip_set_req_ipmap_create)); + + *setdata = ipset_malloc(sizeof(struct ip_set_ipmap)); + + DP("ipmap: initheader() 2"); + + map = (struct ip_set_ipmap *) *setdata; + + map->first_ip = header->from; + map->last_ip = header->to; + map->netmask = header->netmask; + + if (map->netmask == 0xFFFFFFFF) { + map->hosts = 1; + map->sizeid = map->last_ip - map->first_ip + 1; + } else { + unsigned int mask_bits, netmask_bits; + ip_set_ip_t mask; + + mask = range_to_mask(header->from, header->to, &mask_bits); + netmask_bits = mask_to_bits(header->netmask); + + DP("bits: %i %i", mask_bits, netmask_bits); + map->hosts = 2 << (32 - netmask_bits - 1); + map->sizeid = 2 << (netmask_bits - mask_bits - 1); + } + + DP("%i %i", map->hosts, map->sizeid ); + +} + +void initmembers(void *setdata, void *data, size_t len) +{ + struct ip_set_ipmap *mysetdata = + (struct ip_set_ipmap *) setdata; + size_t size; + + DP("ipmap: initmembers()"); + + /* Check so we get the right amount of memberdata */ + size = bitmap_bytes(0, mysetdata->sizeid - 1); + + if (len != size) + exit_error(OTHER_PROBLEM, + "Ipmap: incorrect size of members. " + "Got %d, wanted %d.", len, size); + + mysetdata->members = data; +} + +void killmembers(void **setdata) +{ + struct ip_set_ipmap *mysetdata = + (struct ip_set_ipmap *) *setdata; + + DP("ipmap: killmembers()"); + + if (mysetdata->members != NULL) + ipset_free(&mysetdata->members); + + ipset_free(setdata); +} + +void printheader(const void *setdata, unsigned options) +{ + struct ip_set_ipmap *mysetdata = + (struct ip_set_ipmap *) setdata; + + printf(" from: %s", ip_tostring(mysetdata->first_ip, options)); + printf(" to: %s", ip_tostring(mysetdata->last_ip, options)); + if (mysetdata->netmask == 0xFFFFFFFF) + printf("\n"); + else + printf(" netmask: %d\n", mask_to_bits(mysetdata->netmask)); +} + +void printips_sorted(const void *setdata, unsigned options) +{ + struct ip_set_ipmap *mysetdata = + (struct ip_set_ipmap *) setdata; + ip_set_ip_t id; + + for (id = 0; id < mysetdata->sizeid; id++) + if (test_bit(id, mysetdata->members)) + printf("%s\n", ip_tostring(mysetdata->first_ip + id * mysetdata->hosts, + options)); +} + +void saveheader(const void *setdata) +{ + return; +} + +/* Print save for an IP */ +void saveips(const void *setdata) +{ + return; +} + +void usage(void) +{ + printf + ("-N set ipmap --from IP --to IP [--netmask CIDR-netmask]\n" + "-N set ipmap --network IP/mask [--netmask CIDR-netmask]\n" + "-A set IP\n" + "-D set IP\n" + "-T set IP\n"); +} + +static struct settype settype_ipmap = { + .typename = SETTYPE_NAME, + .typecode = IPSET_TYPE_IP, + .protocol_version = IP_SET_PROTOCOL_VERSION, + + /* Create */ + .create_size = sizeof(struct ip_set_req_ipmap_create), + .create_init = &create_init, + .create_parse = &create_parse, + .create_final = &create_final, + .create_opts = create_opts, + + /* Add/del/test */ + .req_size = sizeof(struct ip_set_req_ipmap), + .adt_parser = &adt_parser, + + /* Get an IP address by id */ + .getipbyid = &getipbyid, + .sizeid = &sizeid, + + /* Printing */ + .initheader = &initheader, + .initmembers = &initmembers, + .killmembers = &killmembers, + .printheader = &printheader, + .printips = &printips_sorted, /* We only have sorted version */ + .printips_sorted = &printips_sorted, + .saveheader = &saveheader, + .saveips = &saveips, + .usage = &usage, + .hint = NULL, +}; + +void _init(void) +{ + settype_register(&settype_ipmap); + +} -- cgit v1.2.3