/*
- * Copyright (c) 2008, 2009, 2010, 2011 Nicira Networks.
+ * Copyright (c) 2008, 2009, 2010, 2011, 2013 Nicira, Inc.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
bool nl_msg_nlmsgerr(const struct ofpbuf *, int *error);
void nl_msg_reserve(struct ofpbuf *, size_t);
-/* Appending headers and raw data. */
+/* Appending and prepending headers and raw data. */
void nl_msg_put_nlmsghdr(struct ofpbuf *, size_t expected_payload,
uint32_t type, uint32_t flags);
void nl_msg_put_genlmsghdr(struct ofpbuf *, size_t expected_payload,
uint8_t cmd, uint8_t version);
void nl_msg_put(struct ofpbuf *, const void *, size_t);
void *nl_msg_put_uninit(struct ofpbuf *, size_t);
+void nl_msg_push(struct ofpbuf *, const void *, size_t);
+void *nl_msg_push_uninit(struct ofpbuf *, size_t);
/* Appending attributes. */
void *nl_msg_put_unspec_uninit(struct ofpbuf *, uint16_t type, size_t);
+void *nl_msg_put_unspec_zero(struct ofpbuf *, uint16_t type, size_t);
void nl_msg_put_unspec(struct ofpbuf *, uint16_t type, const void *, size_t);
void nl_msg_put_flag(struct ofpbuf *, uint16_t type);
void nl_msg_put_u8(struct ofpbuf *, uint16_t type, uint8_t value);
void nl_msg_put_be16(struct ofpbuf *, uint16_t type, ovs_be16 value);
void nl_msg_put_be32(struct ofpbuf *, uint16_t type, ovs_be32 value);
void nl_msg_put_be64(struct ofpbuf *, uint16_t type, ovs_be64 value);
+void nl_msg_put_odp_port(struct ofpbuf *, uint16_t type, odp_port_t value);
void nl_msg_put_string(struct ofpbuf *, uint16_t type, const char *value);
size_t nl_msg_start_nested(struct ofpbuf *, uint16_t type);
void nl_msg_put_nested(struct ofpbuf *, uint16_t type,
const void *data, size_t size);
+/* Prepending attributes. */
+void *nl_msg_push_unspec_uninit(struct ofpbuf *, uint16_t type, size_t);
+void nl_msg_push_unspec(struct ofpbuf *, uint16_t type, const void *, size_t);
+void nl_msg_push_flag(struct ofpbuf *, uint16_t type);
+void nl_msg_push_u8(struct ofpbuf *, uint16_t type, uint8_t value);
+void nl_msg_push_u16(struct ofpbuf *, uint16_t type, uint16_t value);
+void nl_msg_push_u32(struct ofpbuf *, uint16_t type, uint32_t value);
+void nl_msg_push_u64(struct ofpbuf *, uint16_t type, uint64_t value);
+void nl_msg_push_be16(struct ofpbuf *, uint16_t type, ovs_be16 value);
+void nl_msg_push_be32(struct ofpbuf *, uint16_t type, ovs_be32 value);
+void nl_msg_push_be64(struct ofpbuf *, uint16_t type, ovs_be64 value);
+void nl_msg_push_string(struct ofpbuf *, uint16_t type, const char *value);
+
/* Separating buffers into individual messages. */
struct nlmsghdr *nl_msg_next(struct ofpbuf *buffer, struct ofpbuf *msg);
+
+/* Sizes of various attribute types, in bytes, including the attribute header
+ * and padding. */
+#define NL_ATTR_SIZE(PAYLOAD_SIZE) (NLA_HDRLEN + NLA_ALIGN(PAYLOAD_SIZE))
+#define NL_A_U8_SIZE NL_ATTR_SIZE(sizeof(uint8_t))
+#define NL_A_U16_SIZE NL_ATTR_SIZE(sizeof(uint16_t))
+#define NL_A_U32_SIZE NL_ATTR_SIZE(sizeof(uint32_t))
+#define NL_A_U64_SIZE NL_ATTR_SIZE(sizeof(uint64_t))
+#define NL_A_BE16_SIZE NL_ATTR_SIZE(sizeof(ovs_be16))
+#define NL_A_BE32_SIZE NL_ATTR_SIZE(sizeof(ovs_be32))
+#define NL_A_BE64_SIZE NL_ATTR_SIZE(sizeof(ovs_be64))
+#define NL_A_FLAG_SIZE NL_ATTR_SIZE(0)
+
+bool nl_attr_oversized(size_t payload_size);
\f
/* Netlink attribute types. */
enum nl_attr_type
NL_A_UNSPEC,
NL_A_U8,
NL_A_U16,
+ NL_A_BE16 = NL_A_U16,
NL_A_U32,
+ NL_A_BE32 = NL_A_U32,
NL_A_U64,
+ NL_A_BE64 = NL_A_U64,
NL_A_STRING,
NL_A_FLAG,
NL_A_NESTED,
static inline struct nlattr *
nl_attr_next(const struct nlattr *nla)
{
- return (struct nlattr *) ((uint8_t *) nla + NLA_ALIGN(nla->nla_len));
+ return (void *) ((uint8_t *) nla + NLA_ALIGN(nla->nla_len));
}
static inline bool
{
return (maxlen >= sizeof *nla
&& nla->nla_len >= sizeof *nla
- && NLA_ALIGN(nla->nla_len) <= maxlen);
+ && nla->nla_len <= maxlen);
+}
+
+static inline size_t
+nl_attr_len_pad(const struct nlattr *nla, size_t maxlen)
+{
+ size_t len = NLA_ALIGN(nla->nla_len);
+
+ return len <= maxlen ? len : nla->nla_len;
}
/* This macro is careful to check for attributes with bad lengths. */
#define NL_ATTR_FOR_EACH(ITER, LEFT, ATTRS, ATTRS_LEN) \
for ((ITER) = (ATTRS), (LEFT) = (ATTRS_LEN); \
nl_attr_is_valid(ITER, LEFT); \
- (LEFT) -= NLA_ALIGN((ITER)->nla_len), (ITER) = nl_attr_next(ITER))
+ (LEFT) -= nl_attr_len_pad(ITER, LEFT), (ITER) = nl_attr_next(ITER))
/* This macro does not check for attributes with bad lengths. It should only
#define NL_ATTR_FOR_EACH_UNSAFE(ITER, LEFT, ATTRS, ATTRS_LEN) \
for ((ITER) = (ATTRS), (LEFT) = (ATTRS_LEN); \
(LEFT) > 0; \
- (LEFT) -= NLA_ALIGN((ITER)->nla_len), (ITER) = nl_attr_next(ITER))
+ (LEFT) -= nl_attr_len_pad(ITER, LEFT), (ITER) = nl_attr_next(ITER))
+
+/* These variants are convenient for iterating nested attributes. */
+#define NL_NESTED_FOR_EACH(ITER, LEFT, A) \
+ NL_ATTR_FOR_EACH(ITER, LEFT, nl_attr_get(A), nl_attr_get_size(A))
+#define NL_NESTED_FOR_EACH_UNSAFE(ITER, LEFT, A) \
+ NL_ATTR_FOR_EACH_UNSAFE(ITER, LEFT, nl_attr_get(A), nl_attr_get_size(A))
/* Netlink attribute parsing. */
int nl_attr_type(const struct nlattr *);
ovs_be16 nl_attr_get_be16(const struct nlattr *);
ovs_be32 nl_attr_get_be32(const struct nlattr *);
ovs_be64 nl_attr_get_be64(const struct nlattr *);
+odp_port_t nl_attr_get_odp_port(const struct nlattr *);
const char *nl_attr_get_string(const struct nlattr *);
void nl_attr_get_nested(const struct nlattr *, struct ofpbuf *);
bool optional;
};
+#define NL_POLICY_FOR(TYPE) \
+ .type = NL_A_UNSPEC, .min_len = sizeof(TYPE), .max_len = sizeof(TYPE)
+
+bool nl_attr_validate(const struct nlattr *, const struct nl_policy *);
+
bool nl_policy_parse(const struct ofpbuf *, size_t offset,
const struct nl_policy[],
struct nlattr *[], size_t n_attrs);
const struct nlattr *nl_attr_find(const struct ofpbuf *, size_t hdr_len,
uint16_t type);
const struct nlattr *nl_attr_find_nested(const struct nlattr *, uint16_t type);
+const struct nlattr *nl_attr_find__(const struct nlattr *attrs, size_t size,
+ uint16_t type);
#endif /* netlink.h */
git://git.onelab.eu / sliver-openvswitch.git / blobdiff