-/* 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 <xtables.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*/
+enum {
+ O_RT_TYPE = 0,
+ O_RT_SEGSLEFT,
+ O_RT_LEN,
+ O_RT0RES,
+ O_RT0ADDRS,
+ O_RT0NSTRICT,
+ F_RT_TYPE = 1 << O_RT_TYPE,
+ F_RT0ADDRS = 1 << O_RT0ADDRS,
+};
static void rt_help(void)
{
"[!] --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-res check the reserved field 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 }
+#define s struct ip6t_rt
+static const struct xt_option_entry rt_opts[] = {
+ {.name = "rt-type", .id = O_RT_TYPE, .type = XTTYPE_UINT32,
+ .flags = XTOPT_INVERT | XTOPT_PUT, XTOPT_POINTER(s, rt_type)},
+ {.name = "rt-segsleft", .id = O_RT_SEGSLEFT, .type = XTTYPE_UINT32RC,
+ .flags = XTOPT_INVERT | XTOPT_PUT, XTOPT_POINTER(s, segsleft)},
+ {.name = "rt-len", .id = O_RT_LEN, .type = XTTYPE_UINT32,
+ .flags = XTOPT_INVERT | XTOPT_PUT, XTOPT_POINTER(s, hdrlen)},
+ {.name = "rt-0-res", .id = O_RT0RES, .type = XTTYPE_NONE},
+ {.name = "rt-0-addrs", .id = O_RT0ADDRS, .type = XTTYPE_STRING},
+ {.name = "rt-0-not-strict", .id = O_RT0NSTRICT, .type = XTTYPE_NONE},
+ XTOPT_TABLEEND,
};
+#undef s
-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 ) {
- xtables_error(PARAMETER_PROBLEM,
- "RT no valid digits in %s `%s'", typestr, idstr);
- }
- if ( id == ULONG_MAX && errno == ERANGE ) {
- xtables_error(PARAMETER_PROBLEM,
- "%s `%s' specified too big: would overflow",
- typestr, idstr);
- }
- if ( *idstr != '\0' && *ep != '\0' ) {
- xtables_error(PARAMETER_PROBLEM,
- "RT error parsing %s `%s'", typestr, idstr);
- }
- return 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 *
+static const char *
addr_to_numeric(const struct in6_addr *addrp)
{
static char buf[50+1];
- return (char *)inet_ntop(AF_INET6, addrp, buf, sizeof(buf));
+ return inet_ntop(AF_INET6, addrp, buf, sizeof(buf));
}
static struct in6_addr *
return i;
}
-static void rt_init(struct xt_entry_match *m)
+static void rt_parse(struct xt_option_call *cb)
{
- 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;
-}
+ struct ip6t_rt *rtinfo = cb->data;
-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)
- xtables_error(PARAMETER_PROBLEM,
- "Only one `--rt-type' allowed");
- xtables_check_inverse(optarg, &invert, &optind, 0, argv);
- rtinfo->rt_type = parse_rt_num(optarg, "type");
- if (invert)
+ xtables_option_parse(cb);
+ switch (cb->entry->id) {
+ case O_RT_TYPE:
+ if (cb->invert)
rtinfo->invflags |= IP6T_RT_INV_TYP;
rtinfo->flags |= IP6T_RT_TYP;
- *flags |= IP6T_RT_TYP;
break;
- case '2':
- if (*flags & IP6T_RT_SGS)
- xtables_error(PARAMETER_PROBLEM,
- "Only one `--rt-segsleft' allowed");
- xtables_check_inverse(optarg, &invert, &optind, 0, argv);
- parse_rt_segsleft(optarg, rtinfo->segsleft);
- if (invert)
+ case O_RT_SEGSLEFT:
+ if (cb->nvals == 1)
+ rtinfo->segsleft[1] = rtinfo->segsleft[0];
+ if (cb->invert)
rtinfo->invflags |= IP6T_RT_INV_SGS;
rtinfo->flags |= IP6T_RT_SGS;
- *flags |= IP6T_RT_SGS;
break;
- case '3':
- if (*flags & IP6T_RT_LEN)
- xtables_error(PARAMETER_PROBLEM,
- "Only one `--rt-len' allowed");
- xtables_check_inverse(optarg, &invert, &optind, 0, argv);
- rtinfo->hdrlen = parse_rt_num(optarg, "length");
- if (invert)
+ case O_RT_LEN:
+ if (cb->invert)
rtinfo->invflags |= IP6T_RT_INV_LEN;
rtinfo->flags |= IP6T_RT_LEN;
- *flags |= IP6T_RT_LEN;
break;
- case '4':
- if (*flags & IP6T_RT_RES)
- xtables_error(PARAMETER_PROBLEM,
- "Only one `--rt-0-res' allowed");
- if ( !(*flags & IP6T_RT_TYP) || (rtinfo->rt_type != 0) || (rtinfo->invflags & IP6T_RT_INV_TYP) )
+ case O_RT0RES:
+ if (!(cb->xflags & F_RT_TYPE) || rtinfo->rt_type != 0 ||
+ rtinfo->invflags & IP6T_RT_INV_TYP)
xtables_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)
- xtables_error(PARAMETER_PROBLEM,
- "Only one `--rt-0-addrs' allowed");
- if ( !(*flags & IP6T_RT_TYP) || (rtinfo->rt_type != 0) || (rtinfo->invflags & IP6T_RT_INV_TYP) )
+ case O_RT0ADDRS:
+ if (!(cb->xflags & F_RT_TYPE) || rtinfo->rt_type != 0 ||
+ rtinfo->invflags & IP6T_RT_INV_TYP)
xtables_error(PARAMETER_PROBLEM,
"`--rt-type 0' required before `--rt-0-addrs'");
- xtables_check_inverse(optarg, &invert, &optind, 0, argv);
- if (invert)
- xtables_error(PARAMETER_PROBLEM,
- " '!' not allowed with `--rt-0-addrs'");
- rtinfo->addrnr = parse_addresses(optarg, rtinfo->addrs);
+ rtinfo->addrnr = parse_addresses(cb->arg, rtinfo->addrs);
rtinfo->flags |= IP6T_RT_FST;
- *flags |= IP6T_RT_FST;
break;
- case '6':
- if (*flags & IP6T_RT_FST_NSTRICT)
- xtables_error(PARAMETER_PROBLEM,
- "Only one `--rt-0-not-strict' allowed");
- if ( !(*flags & IP6T_RT_FST) )
+ case O_RT0NSTRICT:
+ if (!(cb->xflags & F_RT0ADDRS))
xtables_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,
+print_nums(const char *name, uint32_t min, uint32_t max,
int invert)
{
const char *inv = invert ? "!" : "";
if (min != 0 || max != 0xFFFFFFFF || invert) {
- printf("%s", name);
+ printf(" %s", name);
if (min == max) {
printf(":%s", inv);
printf("%u", min);
printf(":");
printf("%u",max);
}
- printf(" ");
}
}
unsigned int i;
for(i=0; i<addrnr; i++){
- printf("%s%c", addr_to_numeric(&(addrp[i])), (i!=addrnr-1)?',':' ');
+ printf("%c%s", (i==0)?' ':',', addr_to_numeric(&(addrp[i])));
}
}
{
const struct ip6t_rt *rtinfo = (struct ip6t_rt *)match->data;
- printf("rt ");
+ printf(" rt");
if (rtinfo->flags & IP6T_RT_TYP)
- printf("type:%s%d ", rtinfo->invflags & IP6T_RT_INV_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(" 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 ");
+ 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->flags & IP6T_RT_FST_NSTRICT) printf(" 0-not-strict");
if (rtinfo->invflags & ~IP6T_RT_INV_MASK)
- printf("Unknown invflags: 0x%X ",
+ printf(" Unknown invflags: 0x%X",
rtinfo->invflags & ~IP6T_RT_INV_MASK);
}
const struct ip6t_rt *rtinfo = (struct ip6t_rt *)match->data;
if (rtinfo->flags & IP6T_RT_TYP) {
- printf("%s--rt-type %u ",
- (rtinfo->invflags & IP6T_RT_INV_TYP) ? "! " : "",
+ printf("%s --rt-type %u",
+ (rtinfo->invflags & IP6T_RT_INV_TYP) ? " !" : "",
rtinfo->rt_type);
}
if (!(rtinfo->segsleft[0] == 0
&& rtinfo->segsleft[1] == 0xFFFFFFFF)) {
- printf("%s--rt-segsleft ",
- (rtinfo->invflags & IP6T_RT_INV_SGS) ? "! " : "");
+ printf("%s --rt-segsleft ",
+ (rtinfo->invflags & IP6T_RT_INV_SGS) ? " !" : "");
if (rtinfo->segsleft[0]
!= rtinfo->segsleft[1])
- printf("%u:%u ",
+ printf("%u:%u",
rtinfo->segsleft[0],
rtinfo->segsleft[1]);
else
- printf("%u ",
+ printf("%u",
rtinfo->segsleft[0]);
}
if (rtinfo->flags & IP6T_RT_LEN) {
- printf("%s--rt-len %u ",
- (rtinfo->invflags & IP6T_RT_INV_LEN) ? "! " : "",
+ printf("%s --rt-len %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 ");
+ 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 ");
+ if (rtinfo->flags & IP6T_RT_FST_NSTRICT) printf(" --rt-0-not-strict");
}
.size = XT_ALIGN(sizeof(struct ip6t_rt)),
.userspacesize = XT_ALIGN(sizeof(struct ip6t_rt)),
.help = rt_help,
- .init = rt_init,
- .parse = rt_parse,
+ .x6_parse = rt_parse,
.print = rt_print,
.save = rt_save,
- .extra_opts = rt_opts,
+ .x6_options = rt_opts,
};
void
projects / external / iptables.git / blobdiff