@@ -53,6 +53,8 @@ enum ip_set_extension {
IPSET_EXT_TIMEOUT = (1 << IPSET_EXT_BIT_TIMEOUT),
IPSET_EXT_BIT_COUNTER = 1,
IPSET_EXT_COUNTER = (1 << IPSET_EXT_BIT_COUNTER),
+ IPSET_EXT_BIT_COMMENT = 2,
+ IPSET_EXT_COMMENT = (1 << IPSET_EXT_BIT_COMMENT),
/* Mark set with an extension which needs to call destroy */
IPSET_EXT_BIT_DESTROY = 7,
IPSET_EXT_DESTROY = (1 << IPSET_EXT_BIT_DESTROY),
@@ -60,11 +62,13 @@ enum ip_set_extension {
#define SET_WITH_TIMEOUT(s) ((s)->extensions & IPSET_EXT_TIMEOUT)
#define SET_WITH_COUNTER(s) ((s)->extensions & IPSET_EXT_COUNTER)
+#define SET_WITH_COMMENT(s) ((s)->extensions & IPSET_EXT_COMMENT)
/* Extension id, in size order */
enum ip_set_ext_id {
IPSET_EXT_ID_COUNTER = 0,
IPSET_EXT_ID_TIMEOUT,
+ IPSET_EXT_ID_COMMENT,
IPSET_EXT_ID_MAX,
};
@@ -85,6 +89,7 @@ struct ip_set_ext {
u64 packets;
u64 bytes;
u32 timeout;
+ char *comment;
};
struct ip_set_counter {
@@ -92,20 +97,19 @@ struct ip_set_counter {
atomic64_t packets;
};
-struct ip_set;
+struct ip_set_comment {
+ char *str;
+};
-static inline void
-ip_set_ext_destroy(struct ip_set *set, void *data)
-{
- /* Check that the extension is enabled for the set and
- * call it's destroy function for its extension part in data.
- */
-}
+struct ip_set;
#define ext_timeout(e, s) \
(unsigned long *)(((void *)(e)) + (s)->offset[IPSET_EXT_ID_TIMEOUT])
#define ext_counter(e, s) \
(struct ip_set_counter *)(((void *)(e)) + (s)->offset[IPSET_EXT_ID_COUNTER])
+#define ext_comment(e, s) \
+(struct ip_set_comment *)(((void *)(e)) + (s)->offset[IPSET_EXT_ID_COMMENT])
+
typedef int (*ipset_adtfn)(struct ip_set *set, void *value,
const struct ip_set_ext *ext,
@@ -223,6 +227,36 @@ struct ip_set {
};
static inline void
+ip_set_ext_destroy(struct ip_set *set, void *data)
+{
+ /* Check that the extension is enabled for the set and
+ * call it's destroy function for its extension part in data.
+ */
+ if (SET_WITH_COMMENT(set))
+ ip_set_extensions[IPSET_EXT_ID_COMMENT].destroy(
+ ext_comment(data, set));
+}
+
+static inline int
+ip_set_put_flags(struct sk_buff *skb, struct ip_set *set)
+{
+ u32 cadt_flags = 0;
+
+ if (SET_WITH_TIMEOUT(set))
+ if (unlikely(nla_put_net32(skb, IPSET_ATTR_TIMEOUT,
+ htonl(set->timeout))))
+ return -EMSGSIZE;
+ if (SET_WITH_COUNTER(set))
+ cadt_flags |= IPSET_FLAG_WITH_COUNTERS;
+ if (SET_WITH_COMMENT(set))
+ cadt_flags |= IPSET_FLAG_WITH_COMMENT;
+
+ if (!cadt_flags)
+ return 0;
+ return nla_put_net32(skb, IPSET_ATTR_CADT_FLAGS, htonl(cadt_flags));
+}
+
+static inline void
ip_set_add_bytes(u64 bytes, struct ip_set_counter *counter)
{
atomic64_add((long long)bytes, &(counter)->bytes);
@@ -425,6 +459,7 @@ bitmap_bytes(u32 a, u32 b)
}
#include <linux/netfilter/ipset/ip_set_timeout.h>
+#include <linux/netfilter/ipset/ip_set_comment.h>
#define IP_SET_INIT_KEXT(skb, opt, set) \
{ .bytes = (skb)->len, .packets = 1, \
new file mode 100644
@@ -0,0 +1,57 @@
+#ifndef _IP_SET_COMMENT_H
+#define _IP_SET_COMMENT_H
+
+/* Copyright (C) 2013 Oliver Smith <oliver@8.c.9.b.0.7.4.0.1.0.0.2.ip6.arpa>
+ *
+ * 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.
+ */
+
+#ifdef __KERNEL__
+
+static inline char*
+ip_set_comment_uget(struct nlattr *tb)
+{
+ return nla_data(tb);
+}
+
+static inline void
+ip_set_init_comment(struct ip_set_comment *comment,
+ const struct ip_set_ext *ext)
+{
+ size_t len = ext->comment ? strlen(ext->comment) : 0;
+
+ if (unlikely(comment->str)) {
+ kfree(comment->str);
+ comment->str = NULL;
+ }
+ if (!len)
+ return;
+ if (unlikely(len > IPSET_MAX_COMMENT_SIZE))
+ len = IPSET_MAX_COMMENT_SIZE;
+ comment->str = kzalloc(len + 1, GFP_ATOMIC);
+ if (unlikely(!comment->str))
+ return;
+ strlcpy(comment->str, ext->comment, len + 1);
+}
+
+static inline int
+ip_set_put_comment(struct sk_buff *skb, struct ip_set_comment *comment)
+{
+ if (!comment->str)
+ return 0;
+ return nla_put_string(skb, IPSET_ATTR_COMMENT, comment->str);
+}
+
+static inline void
+ip_set_comment_free(struct ip_set_comment *comment)
+{
+ if (unlikely(!comment->str))
+ return;
+ kfree(comment->str);
+ comment->str = NULL;
+}
+
+#endif
+#endif
@@ -10,12 +10,14 @@
#ifndef _UAPI_IP_SET_H
#define _UAPI_IP_SET_H
-
#include <linux/types.h>
/* The protocol version */
#define IPSET_PROTOCOL 6
+/* The maximum permissible comment length we will accept over netlink */
+#define IPSET_MAX_COMMENT_SIZE 255
+
/* The max length of strings including NUL: set and type identifiers */
#define IPSET_MAXNAMELEN 32
@@ -110,6 +112,7 @@ enum {
IPSET_ATTR_IFACE,
IPSET_ATTR_BYTES,
IPSET_ATTR_PACKETS,
+ IPSET_ATTR_COMMENT,
__IPSET_ATTR_ADT_MAX,
};
#define IPSET_ATTR_ADT_MAX (__IPSET_ATTR_ADT_MAX - 1)
@@ -140,6 +143,7 @@ enum ipset_errno {
IPSET_ERR_IPADDR_IPV4,
IPSET_ERR_IPADDR_IPV6,
IPSET_ERR_COUNTER,
+ IPSET_ERR_COMMENT,
/* Type specific error codes */
IPSET_ERR_TYPE_SPECIFIC = 4352,
@@ -176,6 +180,8 @@ enum ipset_cadt_flags {
IPSET_FLAG_NOMATCH = (1 << IPSET_FLAG_BIT_NOMATCH),
IPSET_FLAG_BIT_WITH_COUNTERS = 3,
IPSET_FLAG_WITH_COUNTERS = (1 << IPSET_FLAG_BIT_WITH_COUNTERS),
+ IPSET_FLAG_BIT_WITH_COMMENT = 4,
+ IPSET_FLAG_WITH_COMMENT = (1 << IPSET_FLAG_BIT_WITH_COMMENT),
IPSET_FLAG_CADT_MAX = 15,
};
@@ -315,6 +315,7 @@ ip_set_get_ipaddr6(struct nlattr *nla, union nf_inet_addr *ipaddr)
}
EXPORT_SYMBOL_GPL(ip_set_get_ipaddr6);
+typedef void (*destroyer)(void *);
/* ipset data extension types, in size order */
const struct ip_set_ext_type ip_set_extensions[] = {
@@ -329,6 +330,13 @@ const struct ip_set_ext_type ip_set_extensions[] = {
.len = sizeof(unsigned long),
.align = __alignof__(unsigned long),
},
+ [IPSET_EXT_ID_COMMENT] = {
+ .type = IPSET_EXT_COMMENT | IPSET_EXT_DESTROY,
+ .flag = IPSET_FLAG_WITH_COMMENT,
+ .len = sizeof(struct ip_set_comment),
+ .align = __alignof__(struct ip_set_comment),
+ .destroy = (destroyer) ip_set_comment_free,
+ },
};
EXPORT_SYMBOL_GPL(ip_set_extensions);
@@ -380,6 +388,12 @@ ip_set_get_extensions(struct ip_set *set, struct nlattr *tb[],
ext->packets = be64_to_cpu(nla_get_be64(
tb[IPSET_ATTR_PACKETS]));
}
+ if (tb[IPSET_ATTR_COMMENT]) {
+ if (!(set->extensions & IPSET_EXT_COMMENT))
+ return -IPSET_ERR_COMMENT;
+ ext->comment = ip_set_comment_uget(tb[IPSET_ATTR_COMMENT]);
+ }
+
return 0;
}
EXPORT_SYMBOL_GPL(ip_set_get_extensions);