Ejemplo n.º 1
0
static void ipvs_mt_parse_addr_and_mask(const char *arg,
					union nf_inet_addr *address,
					union nf_inet_addr *mask,
					unsigned int family)
{
	struct in_addr *addr = NULL;
	struct in6_addr *addr6 = NULL;
	unsigned int naddrs = 0;

	if (family == NFPROTO_IPV4) {
		xtables_ipparse_any(arg, &addr, &mask->in, &naddrs);
		if (naddrs > 1)
			xtables_error(PARAMETER_PROBLEM,
				      "multiple IP addresses not allowed");
		if (naddrs == 1)
			memcpy(&address->in, addr, sizeof(*addr));
	} else if (family == NFPROTO_IPV6) {
		xtables_ip6parse_any(arg, &addr6, &mask->in6, &naddrs);
		if (naddrs > 1)
			xtables_error(PARAMETER_PROBLEM,
				      "multiple IP addresses not allowed");
		if (naddrs == 1)
			memcpy(&address->in6, addr6, sizeof(*addr6));
	} else {
		/* Hu? */
		assert(false);
	}
}
Ejemplo n.º 2
0
static int
conntrack_mt6_parse(int c, bool invert, unsigned int *flags,
                    struct xt_conntrack_mtinfo2 *info)
{
	struct in6_addr *addr = NULL;
	unsigned int naddrs = 0;

	switch (c) {
	case '3': /* --ctorigsrc */
		xtables_ip6parse_any(optarg, &addr,
		                         &info->origsrc_mask.in6, &naddrs);
		if (naddrs > 1)
			xtables_error(PARAMETER_PROBLEM,
			           "multiple IP addresses not allowed");
		if (naddrs == 1)
			memcpy(&info->origsrc_addr.in6, addr, sizeof(*addr));
		info->match_flags |= XT_CONNTRACK_ORIGSRC;
		if (invert)
			info->invert_flags |= XT_CONNTRACK_ORIGSRC;
		break;

	case '4': /* --ctorigdst */
		xtables_ip6parse_any(optarg, &addr,
		                         &info->origdst_mask.in6, &naddrs);
		if (naddrs > 1)
			xtables_error(PARAMETER_PROBLEM,
			           "multiple IP addresses not allowed");
		if (naddrs == 1)
			memcpy(&info->origdst_addr.in, addr, sizeof(*addr));
		info->match_flags |= XT_CONNTRACK_ORIGDST;
		if (invert)
			info->invert_flags |= XT_CONNTRACK_ORIGDST;
		break;

	case '5': /* --ctreplsrc */
		xtables_ip6parse_any(optarg, &addr,
		                         &info->replsrc_mask.in6, &naddrs);
		if (naddrs > 1)
			xtables_error(PARAMETER_PROBLEM,
			           "multiple IP addresses not allowed");
		if (naddrs == 1)
			memcpy(&info->replsrc_addr.in, addr, sizeof(*addr));
		info->match_flags |= XT_CONNTRACK_REPLSRC;
		if (invert)
			info->invert_flags |= XT_CONNTRACK_REPLSRC;
		break;

	case '6': /* --ctrepldst */
		xtables_ip6parse_any(optarg, &addr,
		                         &info->repldst_mask.in6, &naddrs);
		if (naddrs > 1)
			xtables_error(PARAMETER_PROBLEM,
			           "multiple IP addresses not allowed");
		if (naddrs == 1)
			memcpy(&info->repldst_addr.in, addr, sizeof(*addr));
		info->match_flags |= XT_CONNTRACK_REPLDST;
		if (invert)
			info->invert_flags |= XT_CONNTRACK_REPLDST;
		break;


	default:
		return conntrack_mt_parse(c, invert, flags, info);
	}

	*flags = info->match_flags;
	return true;
}
Ejemplo n.º 3
0
static int policy_parse(int c, int invert, unsigned int *flags,
                        struct xt_policy_info *info, uint8_t family)
{
	struct xt_policy_elem *e = &info->pol[info->len];
	struct in_addr *addr = NULL, mask;
	struct in6_addr *addr6 = NULL, mask6;
	unsigned int naddr = 0, num;
	int mode;

	xtables_check_inverse(optarg, &invert, &optind, 0);

	switch (c) {
	case '1':
		if (info->flags & (XT_POLICY_MATCH_IN | XT_POLICY_MATCH_OUT))
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --dir option");
		if (invert)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: can't invert --dir option");

		info->flags |= parse_direction(optarg);
		break;
	case '2':
		if (invert)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: can't invert --policy option");

		info->flags |= parse_policy(optarg);
		break;
	case '3':
		if (info->flags & XT_POLICY_MATCH_STRICT)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --strict option");

		if (invert)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: can't invert --strict option");

		info->flags |= XT_POLICY_MATCH_STRICT;
		break;
	case '4':
		if (e->match.reqid)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --reqid option");

		e->match.reqid = 1;
		e->invert.reqid = invert;
		if (!xtables_strtoui(optarg, NULL, &num, 0, UINT32_MAX))
			xtables_param_act(XTF_BAD_VALUE, "policy", "--spi", optarg);
		e->reqid = num;
		break;
	case '5':
		if (e->match.spi)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --spi option");

		e->match.spi = 1;
		e->invert.spi = invert;
		if (!xtables_strtoui(optarg, NULL, &num, 0, UINT32_MAX))
			xtables_param_act(XTF_BAD_VALUE, "policy", "--spi", optarg);
		e->spi = num;
		break;
	case '6':
		if (e->match.saddr)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --tunnel-src option");

		if (family == NFPROTO_IPV6)
			xtables_ip6parse_any(optarg, &addr6, &mask6, &naddr);
		else
			xtables_ipparse_any(optarg, &addr, &mask, &naddr);
		if (naddr > 1)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: name resolves to multiple IPs");

		e->match.saddr = 1;
		e->invert.saddr = invert;
		if (family == NFPROTO_IPV6) {
			memcpy(&e->saddr.a6, addr6, sizeof(*addr6));
			memcpy(&e->smask.a6, &mask6, sizeof(mask6));
		} else {
			e->saddr.a4 = addr[0];
			e->smask.a4 = mask;
		}
                break;
	case '7':
		if (e->match.daddr)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --tunnel-dst option");

		if (family == NFPROTO_IPV6)
			xtables_ip6parse_any(optarg, &addr6, &mask6, &naddr);
		else
			xtables_ipparse_any(optarg, &addr, &mask, &naddr);
		if (naddr > 1)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: name resolves to multiple IPs");

		e->match.daddr = 1;
		e->invert.daddr = invert;
		if (family == NFPROTO_IPV6) {
			memcpy(&e->daddr.a6, addr6, sizeof(*addr6));
			memcpy(&e->dmask.a6, &mask6, sizeof(mask6));
		} else {
			e->daddr.a4 = addr[0];
			e->dmask.a4 = mask;
		}
		break;
	case '8':
		if (e->match.proto)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --proto option");

		e->proto = xtables_parse_protocol(optarg);
		if (e->proto != IPPROTO_AH && e->proto != IPPROTO_ESP &&
		    e->proto != IPPROTO_COMP)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: protocol must ah/esp/ipcomp");
		e->match.proto = 1;
		e->invert.proto = invert;
		break;
	case '9':
		if (e->match.mode)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: double --mode option");

		mode = parse_mode(optarg);
		e->match.mode = 1;
		e->invert.mode = invert;
		e->mode = mode;
		break;
	case 'a':
		if (invert)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: can't invert --next option");

		if (++info->len == XT_POLICY_MAX_ELEM)
			xtables_error(PARAMETER_PROBLEM,
			           "policy match: maximum policy depth reached");
		break;
	default:
		return 0;
	}

	return 1;
}
Ejemplo n.º 4
0
 int nat64_tg6_parse(int c, char **argv, int invert,
		unsigned int *flags, const void *entry,
		struct xt_entry_target **target)
{
	struct xt_nat64_tginfo *info = (void *)(*target)->data;
	struct in6_addr *addrs, mask;
	char out_dev[IFNAMSIZ];
	unsigned char out_dev_mask[IFNAMSIZ];
	unsigned int naddrs;

	switch(c) {
		case '1': /* --ipsrc */
			xtables_error(PARAMETER_PROBLEM, "xt_nat64: "
					"You can't check for the source!");

			return false;

		case '2': /* --ipdst */
			if (*flags & XT_NAT64_IPV6_DST)
				xtables_error(PARAMETER_PROBLEM, "xt_nat64: "
						"Only use \"--ipdst\" once!");

			*flags |= XT_NAT64_IPV6_DST;
			info->flags |= XT_NAT64_IPV6_DST;

			if (invert)
				xtables_error(PARAMETER_PROBLEM, "xt_nat64: "
						"I'm sorry, the invert flag isn't available yet");

			xtables_ip6parse_any(optarg, &addrs, &mask, &naddrs);

			if (naddrs != 1)
				xtables_error(PARAMETER_PROBLEM,
						"%s does not resolves to exactly "
						"one address", optarg);

			if (addrs == NULL)
				xtables_error(PARAMETER_PROBLEM,
						"Parse error at %s\n", optarg);

			memcpy(&info->ip6dst.in6, addrs, sizeof(*addrs));
			memcpy(&info->ip6dst_mask.in6, &mask, sizeof(mask));
			return true;
		case '3': /* --oudev */
			if (*flags & XT_NAT64_OUT_DEV)
				xtables_error(PARAMETER_PROBLEM, "xt_nat64: "
						"Only use \"--outdev\" once!");

			*flags |= XT_NAT64_OUT_DEV;
			info->flags |= XT_NAT64_OUT_DEV;

			if (invert)
				xtables_error(PARAMETER_PROBLEM, "xt_nat64: "
						"I'm sorry, the invert flag isn't available yet");

			xtables_parse_interface(optarg, out_dev, out_dev_mask);

			if (out_dev == NULL)
				xtables_error(PARAMETER_PROBLEM,
						"Parse error at %s\n", optarg);

			memcpy(&info->out_dev, out_dev, sizeof(char) * IFNAMSIZ);
			memcpy(&info->out_dev_mask, out_dev_mask, sizeof(unsigned char) * IFNAMSIZ);
			return true;
	}

	return false;
}