From: Oliver Smith <oliver@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
This adds support to the userspace portion of ipset for handling ipsets
with the comment extension enabled. The library revision has been raised
accordingly.
Signed-off-by: Oliver Smith <oliver@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>
---
Make_global.am | 2 +-
include/libipset/data.h | 6 +++-
include/libipset/linux_ip_set.h | 15 ++++++++++
include/libipset/parse.h | 2 ++
include/libipset/print.h | 3 ++
kernel/include/uapi/linux/netfilter/ipset/ip_set.h | 3 ++
lib/data.c | 34 ++++++++++++++++++++++
lib/debug.c | 1 +
lib/errcode.c | 2 ++
lib/libipset.map | 7 +++++
lib/parse.c | 27 +++++++++++++++++
lib/print.c | 31 ++++++++++++++++++++
lib/session.c | 8 ++++-
lib/types.c | 4 +--
14 files changed, 140 insertions(+), 5 deletions(-)
diff --git a/Make_global.am b/Make_global.am
index 29b5678..9c228cc 100644
--- a/Make_global.am
+++ b/Make_global.am
@@ -69,7 +69,7 @@
# interface.
# curr:rev:age
-LIBVERSION = 4:0:1
+LIBVERSION = 4:1:2
AM_CPPFLAGS = $(kinclude_CFLAGS) $(all_includes) -I$(top_srcdir)/include \
-I/usr/local/include
diff --git a/include/libipset/data.h b/include/libipset/data.h
index 2b6b8cd..8806f15 100644
--- a/include/libipset/data.h
+++ b/include/libipset/data.h
@@ -57,6 +57,8 @@ enum ipset_opt {
IPSET_OPT_COUNTERS,
IPSET_OPT_PACKETS,
IPSET_OPT_BYTES,
+ IPSET_OPT_CREATE_COMMENT,
+ IPSET_OPT_ADT_COMMENT,
/* Internal options */
IPSET_OPT_FLAGS = 48, /* IPSET_FLAG_EXIST| */
IPSET_OPT_CADT_FLAGS, /* IPSET_FLAG_BEFORE| */
@@ -106,11 +108,13 @@ enum ipset_opt {
| IPSET_FLAG(IPSET_OPT_CADT_FLAGS)\
| IPSET_FLAG(IPSET_OPT_BEFORE) \
| IPSET_FLAG(IPSET_OPT_PHYSDEV) \
- | IPSET_FLAG(IPSET_OPT_NOMATCH))
+ | IPSET_FLAG(IPSET_OPT_NOMATCH) \
+ | IPSET_FLAG(IPSET_OPT_ADT_COMMENT))
struct ipset_data;
extern void ipset_strlcpy(char *dst, const char *src, size_t len);
+extern void ipset_strlcat(char *dst, const char *src, size_t len);
extern bool ipset_data_flags_test(const struct ipset_data *data,
uint64_t flags);
extern void ipset_data_flags_set(struct ipset_data *data, uint64_t flags);
diff --git a/include/libipset/linux_ip_set.h b/include/libipset/linux_ip_set.h
index 8024cdf..847bbff 100644
--- a/include/libipset/linux_ip_set.h
+++ b/include/libipset/linux_ip_set.h
@@ -19,6 +19,9 @@
/* The max length of strings including NUL: set and type identifiers */
#define IPSET_MAXNAMELEN 32
+/* The maximum permissible length we will accept over netlink (inc. comments) */
+#define IPSET_MAX_COMMENT_SIZE 255
+
/* Message types and commands */
enum ipset_cmd {
IPSET_CMD_NONE,
@@ -110,6 +113,7 @@ 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 +144,7 @@ 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 +181,8 @@ 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,
};
@@ -250,6 +257,14 @@ struct ip_set_req_get_set {
#define IP_SET_OP_GET_BYINDEX 0x00000007 /* Get set name by index */
/* Uses ip_set_req_get_set */
+#define IP_SET_OP_GET_FNAME 0x00000008 /* Get set index and family */
+struct ip_set_req_get_set_family {
+ unsigned int op;
+ unsigned int version;
+ unsigned int family;
+ union ip_set_name_index set;
+};
+
#define IP_SET_OP_VERSION 0x00000100 /* Ask kernel version */
struct ip_set_req_version {
unsigned int op;
diff --git a/include/libipset/parse.h b/include/libipset/parse.h
index 014c62f..5c46a88 100644
--- a/include/libipset/parse.h
+++ b/include/libipset/parse.h
@@ -90,6 +90,8 @@ extern int ipset_parse_typename(struct ipset_session *session,
enum ipset_opt opt, const char *str);
extern int ipset_parse_iface(struct ipset_session *session,
enum ipset_opt opt, const char *str);
+extern int ipset_parse_comment(struct ipset_session *session,
+ enum ipset_opt opt, const char *str);
extern int ipset_parse_output(struct ipset_session *session,
int opt, const char *str);
extern int ipset_parse_ignored(struct ipset_session *session,
diff --git a/include/libipset/print.h b/include/libipset/print.h
index 1d537bd..f2a6095 100644
--- a/include/libipset/print.h
+++ b/include/libipset/print.h
@@ -40,6 +40,9 @@ extern int ipset_print_port(char *buf, unsigned int len,
extern int ipset_print_iface(char *buf, unsigned int len,
const struct ipset_data *data,
enum ipset_opt opt, uint8_t env);
+extern int ipset_print_comment(char *buf, unsigned int len,
+ const struct ipset_data *data,
+ enum ipset_opt opt, uint8_t env);
extern int ipset_print_proto(char *buf, unsigned int len,
const struct ipset_data *data,
enum ipset_opt opt, uint8_t env);
diff --git a/kernel/include/uapi/linux/netfilter/ipset/ip_set.h b/kernel/include/uapi/linux/netfilter/ipset/ip_set.h
index f177d99..847bbff 100644
--- a/kernel/include/uapi/linux/netfilter/ipset/ip_set.h
+++ b/kernel/include/uapi/linux/netfilter/ipset/ip_set.h
@@ -19,6 +19,9 @@
/* The max length of strings including NUL: set and type identifiers */
#define IPSET_MAXNAMELEN 32
+/* The maximum permissible length we will accept over netlink (inc. comments) */
+#define IPSET_MAX_COMMENT_SIZE 255
+
/* Message types and commands */
enum ipset_cmd {
IPSET_CMD_NONE,
diff --git a/lib/data.c b/lib/data.c
index 04a5997..17c2b68 100644
--- a/lib/data.c
+++ b/lib/data.c
@@ -75,6 +75,7 @@ struct ipset_data {
char iface[IFNAMSIZ];
uint64_t packets;
uint64_t bytes;
+ char comment[IPSET_MAX_COMMENT_SIZE+1];
} adt;
};
};
@@ -108,6 +109,25 @@ ipset_strlcpy(char *dst, const char *src, size_t len)
}
/**
+ * ipset_strlcat - concatenate the string from src to the end of dst
+ * @dst: the target string buffer
+ * @src: the source string buffer
+ * @len: the length of bytes to concat, including the terminating null byte.
+ *
+ * Cooncatenate the string in src to destination, but at most len bytes are
+ * copied. The target is unconditionally terminated by the null byte.
+ */
+void
+ipset_strlcat(char *dst, const char *src, size_t len)
+{
+ assert(dst);
+ assert(src);
+
+ strncat(dst, src, len);
+ dst[len - 1] = '\0';
+}
+
+/**
* ipset_data_flags_test - test option bits in the data blob
* @data: data blob
* @flags: the option flags to test
@@ -278,6 +298,9 @@ ipset_data_set(struct ipset_data *data, enum ipset_opt opt, const void *value)
case IPSET_OPT_COUNTERS:
cadt_flag_type_attr(data, opt, IPSET_FLAG_WITH_COUNTERS);
break;
+ case IPSET_OPT_CREATE_COMMENT:
+ cadt_flag_type_attr(data, opt, IPSET_FLAG_WITH_COMMENT);
+ break;
/* Create-specific options, filled out by the kernel */
case IPSET_OPT_ELEMENTS:
data->create.elements = *(const uint32_t *) value;
@@ -336,6 +359,9 @@ ipset_data_set(struct ipset_data *data, enum ipset_opt opt, const void *value)
case IPSET_OPT_BYTES:
data->adt.bytes = *(const uint64_t *) value;
break;
+ case IPSET_OPT_ADT_COMMENT:
+ ipset_strlcpy(data->adt.comment, value, IPSET_MAX_COMMENT_SIZE);
+ break;
/* Swap/rename */
case IPSET_OPT_SETNAME2:
ipset_strlcpy(data->setname2, value, IPSET_MAXNAMELEN);
@@ -370,6 +396,9 @@ ipset_data_set(struct ipset_data *data, enum ipset_opt opt, const void *value)
if (data->cadt_flags & IPSET_FLAG_WITH_COUNTERS)
ipset_data_flags_set(data,
IPSET_FLAG(IPSET_OPT_COUNTERS));
+ if (data->cadt_flags & IPSET_FLAG_WITH_COMMENT)
+ ipset_data_flags_set(data,
+ IPSET_FLAG(IPSET_OPT_CREATE_COMMENT));
break;
default:
return -1;
@@ -472,6 +501,8 @@ ipset_data_get(const struct ipset_data *data, enum ipset_opt opt)
return &data->adt.packets;
case IPSET_OPT_BYTES:
return &data->adt.bytes;
+ case IPSET_OPT_ADT_COMMENT:
+ return &data->adt.comment;
/* Swap/rename */
case IPSET_OPT_SETNAME2:
return data->setname2;
@@ -484,6 +515,7 @@ ipset_data_get(const struct ipset_data *data, enum ipset_opt opt)
case IPSET_OPT_PHYSDEV:
case IPSET_OPT_NOMATCH:
case IPSET_OPT_COUNTERS:
+ case IPSET_OPT_CREATE_COMMENT:
return &data->cadt_flags;
default:
return NULL;
@@ -543,6 +575,8 @@ ipset_data_sizeof(enum ipset_opt opt, uint8_t family)
case IPSET_OPT_NOMATCH:
case IPSET_OPT_COUNTERS:
return sizeof(uint32_t);
+ case IPSET_OPT_ADT_COMMENT:
+ return IPSET_MAX_COMMENT_SIZE;
default:
return 0;
};
diff --git a/lib/debug.c b/lib/debug.c
index 3aa5a99..a204940 100644
--- a/lib/debug.c
+++ b/lib/debug.c
@@ -64,6 +64,7 @@ static const struct ipset_attrname adtattr2name[] = {
[IPSET_ATTR_CIDR2] = { .name = "CIDR2" },
[IPSET_ATTR_IP2_TO] = { .name = "IP2_TO" },
[IPSET_ATTR_IFACE] = { .name = "IFACE" },
+ [IPSET_ATTR_COMMENT] = { .name = "COMMENT" },
};
static void
diff --git a/lib/errcode.c b/lib/errcode.c
index c939949..160d9ad 100644
--- a/lib/errcode.c
+++ b/lib/errcode.c
@@ -72,6 +72,8 @@ static const struct ipset_errcode_table core_errcode_table[] = {
"An IPv6 address is expected, but not received" },
{ IPSET_ERR_COUNTER, 0,
"Packet/byte counters cannot be used: set was created without counter support" },
+ { IPSET_ERR_COMMENT, 0,
+ "Comment string is too long!" },
/* ADD specific error codes */
{ IPSET_ERR_EXIST, IPSET_CMD_ADD,
diff --git a/lib/libipset.map b/lib/libipset.map
index 271fe59..ab0b96f 100644
--- a/lib/libipset.map
+++ b/lib/libipset.map
@@ -127,3 +127,10 @@ LIBIPSET_4.0 {
global:
ipset_parse_uint64;
} LIBIPSET_3.0;
+
+LIBIPSET_4.1 {
+global:
+ ipset_parse_comment;
+ ipset_print_comment;
+ ipset_strlcat;
+} LIBIPSET_4.0;
diff --git a/lib/parse.c b/lib/parse.c
index 112b273..487d82d 100644
--- a/lib/parse.c
+++ b/lib/parse.c
@@ -1739,6 +1739,33 @@ ipset_parse_iface(struct ipset_session *session,
}
/**
+ * ipset_parse_comment - parse string as a comment
+ * @session: session structure
+ * @opt: option kind of the data
+ * @str: string to parse
+ *
+ * Parse string for use as a comment on an ipset entry.
+ * Gets stored in the data blob as usual.
+ *
+ * Returns 0 on success or a negative error code.
+ */
+int ipset_parse_comment(struct ipset_session *session,
+ enum ipset_opt opt, const char *str)
+{
+ struct ipset_data *data;
+
+ assert(session);
+ assert(opt == IPSET_OPT_ADT_COMMENT);
+ assert(str);
+
+ data = ipset_session_data(session);
+ if (strlen(str) > IPSET_MAX_COMMENT_SIZE)
+ return syntax_err("comment is longer than the maximum allowed "
+ "%d characters", IPSET_MAX_COMMENT_SIZE);
+ return ipset_data_set(data, opt, str);
+}
+
+/**
* ipset_parse_output - parse output format name
* @session: session structure
* @opt: option kind of the data
diff --git a/lib/print.c b/lib/print.c
index 86a7674..abdfd34 100644
--- a/lib/print.c
+++ b/lib/print.c
@@ -530,6 +530,37 @@ ipset_print_iface(char *buf, unsigned int len,
}
/**
+ * ipset_print_comment - print arbitrary parameter string
+ * @buf: printing buffer
+ * @len: length of available buffer space
+ * @data: data blob
+ * @opt: the option kind
+ * @env: environment flags
+ *
+ * Print arbitrary string to output buffer.
+ *
+ * Return length of printed string or error size.
+ */
+int ipset_print_comment(char *buf, unsigned int len,
+ const struct ipset_data *data, enum ipset_opt opt,
+ uint8_t env UNUSED)
+{
+ const char *comment;
+ int size, offset = 0;
+
+ assert(buf);
+ assert(len > 0);
+ assert(data);
+ assert(opt == IPSET_OPT_ADT_COMMENT);
+
+ comment = ipset_data_get(data, opt);
+ assert(comment);
+ size = snprintf(buf + offset, len, "\"%s\"", comment);
+ SNPRINTF_FAILURE(size, len, offset);
+ return offset;
+}
+
+/**
* ipset_print_proto - print protocol name
* @buf: printing buffer
* @len: length of available buffer space
diff --git a/lib/session.c b/lib/session.c
index f1df515..546431d 100644
--- a/lib/session.c
+++ b/lib/session.c
@@ -488,6 +488,11 @@ static const struct ipset_attr_policy adt_attrs[] = {
.type = MNL_TYPE_U64,
.opt = IPSET_OPT_BYTES,
},
+ [IPSET_ATTR_COMMENT] = {
+ .type = MNL_TYPE_NUL_STRING,
+ .opt = IPSET_OPT_ADT_COMMENT,
+ .len = IPSET_MAX_COMMENT_SIZE + 1,
+ },
};
static const struct ipset_attr_policy ipaddr_attrs[] = {
@@ -522,8 +527,9 @@ generic_data_attr_cb(const struct nlattr *attr, void *data,
return MNL_CB_ERROR;
}
if (policy[type].type == MNL_TYPE_NUL_STRING &&
- mnl_attr_get_payload_len(attr) > IPSET_MAXNAMELEN)
+ mnl_attr_get_payload_len(attr) > policy[type].len) {
return MNL_CB_ERROR;
+ }
tb[type] = attr;
return MNL_CB_OK;
}
diff --git a/lib/types.c b/lib/types.c
index adaba83..e2a41ad 100644
--- a/lib/types.c
+++ b/lib/types.c
@@ -607,7 +607,7 @@ ipset_load_types(void)
len = snprintf(path, sizeof(path), "%.*s",
(unsigned int)(next - dir), dir);
- if (len >= sizeof(path) || len < 0)
+ if (len >= (int)sizeof(path) || len < 0)
continue;
n = scandir(path, &list, NULL, alphasort);
@@ -620,7 +620,7 @@ ipset_load_types(void)
len = snprintf(file, sizeof(file), "%s/%s",
path, list[n]->d_name);
- if (len >= sizeof(file) || len < 0)
+ if (len >= (int)sizeof(file) || len < (int)0)
goto nextf;
if (dlopen(file, RTLD_NOW) == NULL)
--
1.8.3.2
--
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