+++ /dev/null
-/* Shared library add-on to ip6tables to add Routing header support. */
-#include <stdio.h>
-#include <netdb.h>
-#include <string.h>
-#include <stdlib.h>
-#include <getopt.h>
-#include <errno.h>
-#include <ip6tables.h>
-/*#include <linux/in6.h>*/
-#include <linux/netfilter_ipv6/ip6t_rt.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <arpa/inet.h>
-
-/*#define DEBUG 1*/
-
-/* Function which prints out usage message. */
-static void rt_help(void)
-{
- printf(
-"rt match options:\n"
-" --rt-type [!] type match the type\n"
-" --rt-segsleft [!] num[:num] match the Segments Left field (range)\n"
-" --rt-len [!] length total length of this header\n"
-" --rt-0-res check the reserved filed, too (type 0)\n"
-" --rt-0-addrs ADDR[,ADDR...] Type=0 addresses (list, max: %d)\n"
-" --rt-0-not-strict List of Type=0 addresses not a strict list\n",
-IP6T_RT_HOPS);
-}
-
-static const struct option rt_opts[] = {
- { "rt-type", 1, NULL, '1' },
- { "rt-segsleft", 1, NULL, '2' },
- { "rt-len", 1, NULL, '3' },
- { "rt-0-res", 0, NULL, '4' },
- { "rt-0-addrs", 1, NULL, '5' },
- { "rt-0-not-strict", 0, NULL, '6' },
- { .name = NULL }
-};
-
-static u_int32_t
-parse_rt_num(const char *idstr, const char *typestr)
-{
- unsigned long int id;
- char* ep;
-
- id = strtoul(idstr,&ep,0) ;
-
- if ( idstr == ep ) {
- exit_error(PARAMETER_PROBLEM,
- "RT no valid digits in %s `%s'", typestr, idstr);
- }
- if ( id == ULONG_MAX && errno == ERANGE ) {
- exit_error(PARAMETER_PROBLEM,
- "%s `%s' specified too big: would overflow",
- typestr, idstr);
- }
- if ( *idstr != '\0' && *ep != '\0' ) {
- exit_error(PARAMETER_PROBLEM,
- "RT error parsing %s `%s'", typestr, idstr);
- }
- return (u_int32_t) id;
-}
-
-static void
-parse_rt_segsleft(const char *idstring, u_int32_t *ids)
-{
- char *buffer;
- char *cp;
-
- buffer = strdup(idstring);
- if ((cp = strchr(buffer, ':')) == NULL)
- ids[0] = ids[1] = parse_rt_num(buffer,"segsleft");
- else {
- *cp = '\0';
- cp++;
-
- ids[0] = buffer[0] ? parse_rt_num(buffer,"segsleft") : 0;
- ids[1] = cp[0] ? parse_rt_num(cp,"segsleft") : 0xFFFFFFFF;
- }
- free(buffer);
-}
-
-static char *
-addr_to_numeric(const struct in6_addr *addrp)
-{
- static char buf[50+1];
- return (char *)inet_ntop(AF_INET6, addrp, buf, sizeof(buf));
-}
-
-static struct in6_addr *
-numeric_to_addr(const char *num)
-{
- static struct in6_addr ap;
- int err;
-
- if ((err=inet_pton(AF_INET6, num, &ap)) == 1)
- return ≈
-#ifdef DEBUG
- fprintf(stderr, "\nnumeric2addr: %d\n", err);
-#endif
- exit_error(PARAMETER_PROBLEM, "bad address: %s", num);
-
- return (struct in6_addr *)NULL;
-}
-
-
-static int
-parse_addresses(const char *addrstr, struct in6_addr *addrp)
-{
- char *buffer, *cp, *next;
- unsigned int i;
-
- buffer = strdup(addrstr);
- if (!buffer) exit_error(OTHER_PROBLEM, "strdup failed");
-
- for (cp=buffer, i=0; cp && i<IP6T_RT_HOPS; cp=next,i++)
- {
- next=strchr(cp, ',');
- if (next) *next++='\0';
- memcpy(&(addrp[i]), numeric_to_addr(cp), sizeof(struct in6_addr));
-#if DEBUG
- printf("addr str: %s\n", cp);
- printf("addr ip6: %s\n", addr_to_numeric((numeric_to_addr(cp))));
- printf("addr [%d]: %s\n", i, addr_to_numeric(&(addrp[i])));
-#endif
- }
- if (cp) exit_error(PARAMETER_PROBLEM, "too many addresses specified");
-
- free(buffer);
-
-#if DEBUG
- printf("addr nr: %d\n", i);
-#endif
-
- return i;
-}
-
-/* Initialize the match. */
-static void rt_init(struct xt_entry_match *m)
-{
- struct ip6t_rt *rtinfo = (struct ip6t_rt *)m->data;
-
- rtinfo->rt_type = 0x0L;
- rtinfo->segsleft[0] = 0x0L;
- rtinfo->segsleft[1] = 0xFFFFFFFF;
- rtinfo->hdrlen = 0;
- rtinfo->flags = 0;
- rtinfo->invflags = 0;
- rtinfo->addrnr = 0;
-}
-
-/* Function which parses command options; returns true if it
- ate an option */
-static int rt_parse(int c, char **argv, int invert, unsigned int *flags,
- const void *entry, struct xt_entry_match **match)
-{
- struct ip6t_rt *rtinfo = (struct ip6t_rt *)(*match)->data;
-
- switch (c) {
- case '1':
- if (*flags & IP6T_RT_TYP)
- exit_error(PARAMETER_PROBLEM,
- "Only one `--rt-type' allowed");
- check_inverse(optarg, &invert, &optind, 0);
- rtinfo->rt_type = parse_rt_num(argv[optind-1], "type");
- if (invert)
- rtinfo->invflags |= IP6T_RT_INV_TYP;
- rtinfo->flags |= IP6T_RT_TYP;
- *flags |= IP6T_RT_TYP;
- break;
- case '2':
- if (*flags & IP6T_RT_SGS)
- exit_error(PARAMETER_PROBLEM,
- "Only one `--rt-segsleft' allowed");
- check_inverse(optarg, &invert, &optind, 0);
- parse_rt_segsleft(argv[optind-1], rtinfo->segsleft);
- if (invert)
- rtinfo->invflags |= IP6T_RT_INV_SGS;
- rtinfo->flags |= IP6T_RT_SGS;
- *flags |= IP6T_RT_SGS;
- break;
- case '3':
- if (*flags & IP6T_RT_LEN)
- exit_error(PARAMETER_PROBLEM,
- "Only one `--rt-len' allowed");
- check_inverse(optarg, &invert, &optind, 0);
- rtinfo->hdrlen = parse_rt_num(argv[optind-1], "length");
- if (invert)
- rtinfo->invflags |= IP6T_RT_INV_LEN;
- rtinfo->flags |= IP6T_RT_LEN;
- *flags |= IP6T_RT_LEN;
- break;
- case '4':
- if (*flags & IP6T_RT_RES)
- exit_error(PARAMETER_PROBLEM,
- "Only one `--rt-0-res' allowed");
- if ( !(*flags & IP6T_RT_TYP) || (rtinfo->rt_type != 0) || (rtinfo->invflags & IP6T_RT_INV_TYP) )
- exit_error(PARAMETER_PROBLEM,
- "`--rt-type 0' required before `--rt-0-res'");
- rtinfo->flags |= IP6T_RT_RES;
- *flags |= IP6T_RT_RES;
- break;
- case '5':
- if (*flags & IP6T_RT_FST)
- exit_error(PARAMETER_PROBLEM,
- "Only one `--rt-0-addrs' allowed");
- if ( !(*flags & IP6T_RT_TYP) || (rtinfo->rt_type != 0) || (rtinfo->invflags & IP6T_RT_INV_TYP) )
- exit_error(PARAMETER_PROBLEM,
- "`--rt-type 0' required before `--rt-0-addrs'");
- check_inverse(optarg, &invert, &optind, 0);
- if (invert)
- exit_error(PARAMETER_PROBLEM,
- " '!' not allowed with `--rt-0-addrs'");
- rtinfo->addrnr = parse_addresses(argv[optind-1], rtinfo->addrs);
- rtinfo->flags |= IP6T_RT_FST;
- *flags |= IP6T_RT_FST;
- break;
- case '6':
- if (*flags & IP6T_RT_FST_NSTRICT)
- exit_error(PARAMETER_PROBLEM,
- "Only one `--rt-0-not-strict' allowed");
- if ( !(*flags & IP6T_RT_FST) )
- exit_error(PARAMETER_PROBLEM,
- "`--rt-0-addr ...' required before `--rt-0-not-strict'");
- rtinfo->flags |= IP6T_RT_FST_NSTRICT;
- *flags |= IP6T_RT_FST_NSTRICT;
- break;
- default:
- return 0;
- }
-
- return 1;
-}
-
-static void
-print_nums(const char *name, u_int32_t min, u_int32_t max,
- int invert)
-{
- const char *inv = invert ? "!" : "";
-
- if (min != 0 || max != 0xFFFFFFFF || invert) {
- printf("%s", name);
- if (min == max) {
- printf(":%s", inv);
- printf("%u", min);
- } else {
- printf("s:%s", inv);
- printf("%u",min);
- printf(":");
- printf("%u",max);
- }
- printf(" ");
- }
-}
-
-static void
-print_addresses(unsigned int addrnr, struct in6_addr *addrp)
-{
- unsigned int i;
-
- for(i=0; i<addrnr; i++){
- printf("%s%c", addr_to_numeric(&(addrp[i])), (i!=addrnr-1)?',':' ');
- }
-}
-
-/* Prints out the union ip6t_matchinfo. */
-static void rt_print(const void *ip, const struct xt_entry_match *match,
- int numeric)
-{
- const struct ip6t_rt *rtinfo = (struct ip6t_rt *)match->data;
-
- printf("rt ");
- if (rtinfo->flags & IP6T_RT_TYP)
- printf("type:%s%d ", rtinfo->invflags & IP6T_RT_INV_TYP ? "!" : "",
- rtinfo->rt_type);
- print_nums("segsleft", rtinfo->segsleft[0], rtinfo->segsleft[1],
- rtinfo->invflags & IP6T_RT_INV_SGS);
- if (rtinfo->flags & IP6T_RT_LEN) {
- printf("length");
- printf(":%s", rtinfo->invflags & IP6T_RT_INV_LEN ? "!" : "");
- printf("%u", rtinfo->hdrlen);
- printf(" ");
- }
- if (rtinfo->flags & IP6T_RT_RES) printf("reserved ");
- if (rtinfo->flags & IP6T_RT_FST) printf("0-addrs ");
- print_addresses(rtinfo->addrnr, (struct in6_addr *)rtinfo->addrs);
- if (rtinfo->flags & IP6T_RT_FST_NSTRICT) printf("0-not-strict ");
- if (rtinfo->invflags & ~IP6T_RT_INV_MASK)
- printf("Unknown invflags: 0x%X ",
- rtinfo->invflags & ~IP6T_RT_INV_MASK);
-}
-
-/* Saves the union ip6t_matchinfo in parsable form to stdout. */
-static void rt_save(const void *ip, const struct xt_entry_match *match)
-{
- const struct ip6t_rt *rtinfo = (struct ip6t_rt *)match->data;
-
- if (rtinfo->flags & IP6T_RT_TYP) {
- printf("--rt-type %s%u ",
- (rtinfo->invflags & IP6T_RT_INV_TYP) ? "! " : "",
- rtinfo->rt_type);
- }
-
- if (!(rtinfo->segsleft[0] == 0
- && rtinfo->segsleft[1] == 0xFFFFFFFF)) {
- printf("--rt-segsleft %s",
- (rtinfo->invflags & IP6T_RT_INV_SGS) ? "! " : "");
- if (rtinfo->segsleft[0]
- != rtinfo->segsleft[1])
- printf("%u:%u ",
- rtinfo->segsleft[0],
- rtinfo->segsleft[1]);
- else
- printf("%u ",
- rtinfo->segsleft[0]);
- }
-
- if (rtinfo->flags & IP6T_RT_LEN) {
- printf("--rt-len %s%u ",
- (rtinfo->invflags & IP6T_RT_INV_LEN) ? "! " : "",
- rtinfo->hdrlen);
- }
-
- if (rtinfo->flags & IP6T_RT_RES) printf("--rt-0-res ");
- if (rtinfo->flags & IP6T_RT_FST) printf("--rt-0-addrs ");
- print_addresses(rtinfo->addrnr, (struct in6_addr *)rtinfo->addrs);
- if (rtinfo->flags & IP6T_RT_FST_NSTRICT) printf("--rt-0-not-strict ");
-
-}
-
-static struct xtables_match rt_mt6_reg = {
- .name = "rt",
- .version = XTABLES_VERSION,
- .family = PF_INET6,
- .size = XT_ALIGN(sizeof(struct ip6t_rt)),
- .userspacesize = XT_ALIGN(sizeof(struct ip6t_rt)),
- .help = rt_help,
- .init = rt_init,
- .parse = rt_parse,
- .print = rt_print,
- .save = rt_save,
- .extra_opts = rt_opts,
-};
-
-void
-_init(void)
-{
- xtables_register_match(&rt_mt6_reg);
-}
git://git.onelab.eu / iptables.git / blobdiff