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-rw-r--r--iptables/nft-ipv6.c217
1 files changed, 217 insertions, 0 deletions
diff --git a/iptables/nft-ipv6.c b/iptables/nft-ipv6.c
new file mode 100644
index 00000000..a2e80306
--- /dev/null
+++ b/iptables/nft-ipv6.c
@@ -0,0 +1,217 @@
+/*
+ * (C) 2012-2013 by Pablo Neira Ayuso <pablo@netfilter.org>
+ * (C) 2013 by Tomasz Bursztyka <tomasz.bursztyka@linux.intel.com>
+ *
+ * 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 code has been sponsored by Sophos Astaro <http://www.sophos.com>
+ */
+
+#include <string.h>
+#include <stdio.h>
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <netinet/ip6.h>
+
+#include <xtables.h>
+
+#include "nft-shared.h"
+
+static int nft_ipv6_add(struct nft_rule *r, struct iptables_command_state *cs)
+{
+ if (cs->fw6.ipv6.iniface[0] != '\0')
+ add_iniface(r, cs->fw6.ipv6.iniface, cs->fw6.ipv6.invflags);
+
+ if (cs->fw6.ipv6.outiface[0] != '\0')
+ add_outiface(r, cs->fw6.ipv6.outiface, cs->fw6.ipv6.invflags);
+
+ if (!IN6_IS_ADDR_UNSPECIFIED(&cs->fw6.ipv6.src))
+ add_addr(r, offsetof(struct ip6_hdr, ip6_src),
+ &cs->fw6.ipv6.src, 16, cs->fw6.ipv6.invflags);
+
+ if (!IN6_IS_ADDR_UNSPECIFIED(&cs->fw6.ipv6.dst))
+ add_addr(r, offsetof(struct ip6_hdr, ip6_dst),
+ &cs->fw6.ipv6.dst, 16, cs->fw6.ipv6.invflags);
+
+ if (cs->fw6.ipv6.proto != 0)
+ add_proto(r, offsetof(struct ip6_hdr, ip6_nxt), 1,
+ cs->fw6.ipv6.proto, cs->fw6.ipv6.invflags);
+
+ return cs->fw6.ipv6.flags;
+}
+
+static bool nft_ipv6_is_same(const struct iptables_command_state *a,
+ const struct iptables_command_state *b)
+{
+ if (memcmp(a->fw6.ipv6.src.s6_addr, b->fw6.ipv6.src.s6_addr,
+ sizeof(struct in6_addr)) != 0
+ || memcmp(a->fw6.ipv6.dst.s6_addr, b->fw6.ipv6.dst.s6_addr,
+ sizeof(struct in6_addr)) != 0
+ || a->fw6.ipv6.proto != b->fw6.ipv6.proto
+ || a->fw6.ipv6.flags != b->fw6.ipv6.flags
+ || a->fw6.ipv6.invflags != b->fw6.ipv6.invflags) {
+ DEBUGP("different src/dst/proto/flags/invflags\n");
+ return false;
+ }
+
+ return is_same_interfaces(a->fw6.ipv6.iniface, a->fw6.ipv6.outiface,
+ a->fw6.ipv6.iniface_mask,
+ a->fw6.ipv6.outiface_mask,
+ b->fw6.ipv6.iniface, b->fw6.ipv6.outiface,
+ b->fw6.ipv6.iniface_mask,
+ b->fw6.ipv6.outiface_mask);
+}
+
+static void nft_ipv6_print_payload(struct nft_rule_expr *e,
+ struct nft_rule_expr_iter *iter)
+{
+ uint32_t offset;
+ bool inv;
+
+ offset = nft_rule_expr_get_u32(e, NFT_EXPR_PAYLOAD_OFFSET);
+
+ switch (offset) {
+ char addr_str[INET6_ADDRSTRLEN];
+ struct in6_addr addr;
+ uint8_t proto;
+ case offsetof(struct ip6_hdr, ip6_src):
+ get_cmp_data(iter, &addr, sizeof(addr), &inv);
+ inet_ntop(AF_INET6, &addr, addr_str, INET6_ADDRSTRLEN);
+
+ if (inv)
+ printf("! -s %s ", addr_str);
+ else
+ printf("-s %s ", addr_str);
+
+ break;
+ case offsetof(struct ip6_hdr, ip6_dst):
+ get_cmp_data(iter, &addr, sizeof(addr), &inv);
+ inet_ntop(AF_INET6, &addr, addr_str, INET6_ADDRSTRLEN);
+
+ if (inv)
+ printf("! -d %s ", addr_str);
+ else
+ printf("-d %s ", addr_str);
+
+ break;
+ case offsetof(struct ip6_hdr, ip6_nxt):
+ get_cmp_data(iter, &proto, sizeof(proto), &inv);
+ print_proto(proto, inv);
+ break;
+ default:
+ DEBUGP("unknown payload offset %d\n", offset);
+ break;
+ }
+}
+
+static void nft_ipv6_parse_meta(struct nft_rule_expr *e, uint8_t key,
+ struct iptables_command_state *cs)
+{
+ parse_meta(e, key, cs->fw6.ipv6.iniface,
+ cs->fw6.ipv6.iniface_mask, cs->fw6.ipv6.outiface,
+ cs->fw6.ipv6.outiface_mask, &cs->fw6.ipv6.invflags);
+}
+
+static void nft_ipv6_parse_payload(struct nft_rule_expr_iter *iter,
+ struct iptables_command_state *cs,
+ uint32_t offset)
+{
+ switch (offset) {
+ struct in6_addr addr;
+ uint8_t proto;
+ bool inv;
+
+ case offsetof(struct ip6_hdr, ip6_src):
+ get_cmp_data(iter, &addr, sizeof(addr), &inv);
+ memcpy(cs->fw6.ipv6.src.s6_addr, &addr, sizeof(addr));
+ if (inv)
+ cs->fw6.ipv6.invflags |= IPT_INV_SRCIP;
+ break;
+ case offsetof(struct ip6_hdr, ip6_dst):
+ get_cmp_data(iter, &addr, sizeof(addr), &inv);
+ memcpy(cs->fw6.ipv6.dst.s6_addr, &addr, sizeof(addr));
+ if (inv)
+ cs->fw6.ipv6.invflags |= IPT_INV_DSTIP;
+ break;
+ case offsetof(struct ip6_hdr, ip6_nxt):
+ get_cmp_data(iter, &proto, sizeof(proto), &inv);
+ cs->fw6.ipv6.flags |= IP6T_F_PROTO;
+ cs->fw6.ipv6.proto = proto;
+ if (inv)
+ cs->fw6.ipv6.invflags |= IPT_INV_PROTO;
+ default:
+ DEBUGP("unknown payload offset %d\n", offset);
+ break;
+ }
+}
+
+static void nft_ipv6_parse_immediate(struct iptables_command_state *cs)
+{
+ cs->fw6.ipv6.flags |= IPT_F_GOTO;
+}
+
+static void print_ipv6_addr(const struct iptables_command_state *cs,
+ unsigned int format)
+{
+ char buf[BUFSIZ];
+
+ fputc(cs->fw6.ipv6.invflags & IPT_INV_SRCIP ? '!' : ' ', stdout);
+ if (IN6_IS_ADDR_UNSPECIFIED(&cs->fw6.ipv6.src)
+ && !(format & FMT_NUMERIC))
+ printf(FMT("%-19s ","%s "), "anywhere");
+ else {
+ if (format & FMT_NUMERIC)
+ strcpy(buf,
+ xtables_ip6addr_to_numeric(&cs->fw6.ipv6.src));
+ else
+ strcpy(buf,
+ xtables_ip6addr_to_anyname(&cs->fw6.ipv6.src));
+ strcat(buf, xtables_ip6mask_to_numeric(&cs->fw6.ipv6.smsk));
+ printf(FMT("%-19s ","%s "), buf);
+ }
+
+
+ fputc(cs->fw6.ipv6.invflags & IPT_INV_DSTIP ? '!' : ' ', stdout);
+ if (IN6_IS_ADDR_UNSPECIFIED(&cs->fw6.ipv6.dst)
+ && !(format & FMT_NUMERIC))
+ printf(FMT("%-19s ","-> %s"), "anywhere");
+ else {
+ if (format & FMT_NUMERIC)
+ strcpy(buf,
+ xtables_ip6addr_to_numeric(&cs->fw6.ipv6.dst));
+ else
+ strcpy(buf,
+ xtables_ip6addr_to_anyname(&cs->fw6.ipv6.dst));
+ strcat(buf, xtables_ip6mask_to_numeric(&cs->fw6.ipv6.dmsk));
+ printf(FMT("%-19s ","-> %s"), buf);
+ }
+}
+
+static uint8_t nft_ipv6_print_firewall(const struct iptables_command_state *cs,
+ const char *targname, unsigned int num,
+ unsigned int format)
+{
+ print_firewall_details(cs, targname, cs->fw6.ipv6.flags,
+ cs->fw6.ipv6.invflags, cs->fw6.ipv6.proto,
+ cs->fw6.ipv6.iniface, cs->fw6.ipv6.outiface,
+ num, format);
+
+ print_ipv6_addr(cs, format);
+
+ return cs->fw6.ipv6.flags;
+}
+
+struct nft_family_ops nft_family_ops_ipv6 = {
+ .add = nft_ipv6_add,
+ .is_same = nft_ipv6_is_same,
+ .print_payload = nft_ipv6_print_payload,
+ .parse_meta = nft_ipv6_parse_meta,
+ .parse_payload = nft_ipv6_parse_payload,
+ .parse_immediate = nft_ipv6_parse_immediate,
+ .print_firewall = nft_ipv6_print_firewall,
+};