--- /dev/null
+/* Copyright (C) 2003-2013 Jozsef Kadlecsik <kadlec@blackhole.kfki.hu>
+ * Copyright (C) 2013 Smoothwall Ltd. <vytas.dauksa@smoothwall.net>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+/* Kernel module implementing an IP set type: the hash:ip,mark type */
+
+#include <linux/jhash.h>
+#include <linux/module.h>
+#include <linux/ip.h>
+#include <linux/skbuff.h>
+#include <linux/errno.h>
+#include <linux/random.h>
+#include <net/ip.h>
+#include <net/ipv6.h>
+#include <net/netlink.h>
+#include <net/tcp.h>
+
+#include <linux/netfilter.h>
+#include <linux/netfilter/ipset/pfxlen.h>
+#include <linux/netfilter/ipset/ip_set.h>
+#include <linux/netfilter/ipset/ip_set_hash.h>
+
+#define IPSET_TYPE_REV_MIN 0
+/* 1 Forceadd support */
+#define IPSET_TYPE_REV_MAX 2 /* skbinfo support */
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Vytas Dauksa <vytas.dauksa@smoothwall.net>");
+IP_SET_MODULE_DESC("hash:ip,mark", IPSET_TYPE_REV_MIN, IPSET_TYPE_REV_MAX);
+MODULE_ALIAS("ip_set_hash:ip,mark");
+
+/* Type specific function prefix */
+#define HTYPE hash_ipmark
+#define IP_SET_HASH_WITH_MARKMASK
+
+/* IPv4 variant */
+
+/* Member elements */
+struct hash_ipmark4_elem {
+ __be32 ip;
+ __u32 mark;
+};
+
+/* Common functions */
+
+static inline bool
+hash_ipmark4_data_equal(const struct hash_ipmark4_elem *ip1,
+ const struct hash_ipmark4_elem *ip2,
+ u32 *multi)
+{
+ return ip1->ip == ip2->ip &&
+ ip1->mark == ip2->mark;
+}
+
+static bool
+hash_ipmark4_data_list(struct sk_buff *skb,
+ const struct hash_ipmark4_elem *data)
+{
+ if (nla_put_ipaddr4(skb, IPSET_ATTR_IP, data->ip) ||
+ nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static inline void
+hash_ipmark4_data_next(struct hash_ipmark4_elem *next,
+ const struct hash_ipmark4_elem *d)
+{
+ next->ip = d->ip;
+}
+
+#define MTYPE hash_ipmark4
+#define PF 4
+#define HOST_MASK 32
+#define HKEY_DATALEN sizeof(struct hash_ipmark4_elem)
+#include "ip_set_hash_gen.h"
+
+static int
+hash_ipmark4_kadt(struct ip_set *set, const struct sk_buff *skb,
+ const struct xt_action_param *par,
+ enum ipset_adt adt, struct ip_set_adt_opt *opt)
+{
+ const struct hash_ipmark *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipmark4_elem e = { };
+ struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
+
+ e.mark = skb->mark;
+ e.mark &= h->markmask;
+
+ ip4addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip);
+ return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
+}
+
+static int
+hash_ipmark4_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
+{
+ const struct hash_ipmark *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipmark4_elem e = { };
+ struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
+ u32 ip, ip_to = 0;
+ int ret;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] ||
+ !ip_set_attr_netorder(tb, IPSET_ATTR_MARK) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE)))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_ipaddr4(tb[IPSET_ATTR_IP], &e.ip) ||
+ ip_set_get_extensions(set, tb, &ext);
+ if (ret)
+ return ret;
+
+ e.mark = ntohl(nla_get_u32(tb[IPSET_ATTR_MARK]));
+ e.mark &= h->markmask;
+
+ if (adt == IPSET_TEST ||
+ !(tb[IPSET_ATTR_IP_TO] || tb[IPSET_ATTR_CIDR])) {
+ ret = adtfn(set, &e, &ext, &ext, flags);
+ return ip_set_eexist(ret, flags) ? 0 : ret;
+ }
+
+ ip_to = ip = ntohl(e.ip);
+ if (tb[IPSET_ATTR_IP_TO]) {
+ ret = ip_set_get_hostipaddr4(tb[IPSET_ATTR_IP_TO], &ip_to);
+ if (ret)
+ return ret;
+ if (ip > ip_to)
+ swap(ip, ip_to);
+ } else if (tb[IPSET_ATTR_CIDR]) {
+ u8 cidr = nla_get_u8(tb[IPSET_ATTR_CIDR]);
+
+ if (!cidr || cidr > 32)
+ return -IPSET_ERR_INVALID_CIDR;
+ ip_set_mask_from_to(ip, ip_to, cidr);
+ }
+
+ if (retried)
+ ip = ntohl(h->next.ip);
+ for (; !before(ip_to, ip); ip++) {
+ e.ip = htonl(ip);
+ ret = adtfn(set, &e, &ext, &ext, flags);
+
+ if (ret && !ip_set_eexist(ret, flags))
+ return ret;
+ else
+ ret = 0;
+ }
+ return ret;
+}
+
+/* IPv6 variant */
+
+struct hash_ipmark6_elem {
+ union nf_inet_addr ip;
+ __u32 mark;
+};
+
+/* Common functions */
+
+static inline bool
+hash_ipmark6_data_equal(const struct hash_ipmark6_elem *ip1,
+ const struct hash_ipmark6_elem *ip2,
+ u32 *multi)
+{
+ return ipv6_addr_equal(&ip1->ip.in6, &ip2->ip.in6) &&
+ ip1->mark == ip2->mark;
+}
+
+static bool
+hash_ipmark6_data_list(struct sk_buff *skb,
+ const struct hash_ipmark6_elem *data)
+{
+ if (nla_put_ipaddr6(skb, IPSET_ATTR_IP, &data->ip.in6) ||
+ nla_put_net32(skb, IPSET_ATTR_MARK, htonl(data->mark)))
+ goto nla_put_failure;
+ return 0;
+
+nla_put_failure:
+ return 1;
+}
+
+static inline void
+hash_ipmark6_data_next(struct hash_ipmark4_elem *next,
+ const struct hash_ipmark6_elem *d)
+{
+}
+
+#undef MTYPE
+#undef PF
+#undef HOST_MASK
+#undef HKEY_DATALEN
+
+#define MTYPE hash_ipmark6
+#define PF 6
+#define HOST_MASK 128
+#define HKEY_DATALEN sizeof(struct hash_ipmark6_elem)
+#define IP_SET_EMIT_CREATE
+#include "ip_set_hash_gen.h"
+
+
+static int
+hash_ipmark6_kadt(struct ip_set *set, const struct sk_buff *skb,
+ const struct xt_action_param *par,
+ enum ipset_adt adt, struct ip_set_adt_opt *opt)
+{
+ const struct hash_ipmark *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipmark6_elem e = { };
+ struct ip_set_ext ext = IP_SET_INIT_KEXT(skb, opt, set);
+
+ e.mark = skb->mark;
+ e.mark &= h->markmask;
+
+ ip6addrptr(skb, opt->flags & IPSET_DIM_ONE_SRC, &e.ip.in6);
+ return adtfn(set, &e, &ext, &opt->ext, opt->cmdflags);
+}
+
+static int
+hash_ipmark6_uadt(struct ip_set *set, struct nlattr *tb[],
+ enum ipset_adt adt, u32 *lineno, u32 flags, bool retried)
+{
+ const struct hash_ipmark *h = set->data;
+ ipset_adtfn adtfn = set->variant->adt[adt];
+ struct hash_ipmark6_elem e = { };
+ struct ip_set_ext ext = IP_SET_INIT_UEXT(set);
+ int ret;
+
+ if (unlikely(!tb[IPSET_ATTR_IP] ||
+ !ip_set_attr_netorder(tb, IPSET_ATTR_MARK) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_TIMEOUT) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_PACKETS) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_BYTES) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBMARK) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBPRIO) ||
+ !ip_set_optattr_netorder(tb, IPSET_ATTR_SKBQUEUE) ||
+ tb[IPSET_ATTR_IP_TO] ||
+ tb[IPSET_ATTR_CIDR]))
+ return -IPSET_ERR_PROTOCOL;
+
+ if (tb[IPSET_ATTR_LINENO])
+ *lineno = nla_get_u32(tb[IPSET_ATTR_LINENO]);
+
+ ret = ip_set_get_ipaddr6(tb[IPSET_ATTR_IP], &e.ip) ||
+ ip_set_get_extensions(set, tb, &ext);
+ if (ret)
+ return ret;
+
+ e.mark = ntohl(nla_get_u32(tb[IPSET_ATTR_MARK]));
+ e.mark &= h->markmask;
+
+ if (adt == IPSET_TEST) {
+ ret = adtfn(set, &e, &ext, &ext, flags);
+ return ip_set_eexist(ret, flags) ? 0 : ret;
+ }
+
+ ret = adtfn(set, &e, &ext, &ext, flags);
+ if (ret && !ip_set_eexist(ret, flags))
+ return ret;
+ else
+ ret = 0;
+
+ return ret;
+}
+
+static struct ip_set_type hash_ipmark_type __read_mostly = {
+ .name = "hash:ip,mark",
+ .protocol = IPSET_PROTOCOL,
+ .features = IPSET_TYPE_IP | IPSET_TYPE_MARK,
+ .dimension = IPSET_DIM_TWO,
+ .family = NFPROTO_UNSPEC,
+ .revision_min = IPSET_TYPE_REV_MIN,
+ .revision_max = IPSET_TYPE_REV_MAX,
+ .create = hash_ipmark_create,
+ .create_policy = {
+ [IPSET_ATTR_MARKMASK] = { .type = NLA_U32 },
+ [IPSET_ATTR_HASHSIZE] = { .type = NLA_U32 },
+ [IPSET_ATTR_MAXELEM] = { .type = NLA_U32 },
+ [IPSET_ATTR_PROBES] = { .type = NLA_U8 },
+ [IPSET_ATTR_RESIZE] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ [IPSET_ATTR_CADT_FLAGS] = { .type = NLA_U32 },
+ },
+ .adt_policy = {
+ [IPSET_ATTR_IP] = { .type = NLA_NESTED },
+ [IPSET_ATTR_IP_TO] = { .type = NLA_NESTED },
+ [IPSET_ATTR_MARK] = { .type = NLA_U32 },
+ [IPSET_ATTR_CIDR] = { .type = NLA_U8 },
+ [IPSET_ATTR_TIMEOUT] = { .type = NLA_U32 },
+ [IPSET_ATTR_LINENO] = { .type = NLA_U32 },
+ [IPSET_ATTR_BYTES] = { .type = NLA_U64 },
+ [IPSET_ATTR_PACKETS] = { .type = NLA_U64 },
+ [IPSET_ATTR_COMMENT] = { .type = NLA_NUL_STRING },
+ [IPSET_ATTR_SKBMARK] = { .type = NLA_U64 },
+ [IPSET_ATTR_SKBPRIO] = { .type = NLA_U32 },
+ [IPSET_ATTR_SKBQUEUE] = { .type = NLA_U16 },
+ },
+ .me = THIS_MODULE,
+};
+
+static int __init
+hash_ipmark_init(void)
+{
+ return ip_set_type_register(&hash_ipmark_type);
+}
+
+static void __exit
+hash_ipmark_fini(void)
+{
+ ip_set_type_unregister(&hash_ipmark_type);
+}
+
+module_init(hash_ipmark_init);
+module_exit(hash_ipmark_fini);
Code Review / kvmfornfv.git / blobdiff