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netlink: Add functions for working with big-endian attribute values.

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These _be<N> functions are completely equivalent to the corresponding
_u<N> functions, but the names help to make their purpose clear.

Acked-by: Jesse Gross <jesse@nicira.com>
This commit is contained in:
Ben Pfaff
2010-12-07 09:37:29 -08:00
parent 2fe27d5ad2
commit ee913f985d
2 changed files with 66 additions and 9 deletions
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69
lib/netlink.c
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@@ -243,30 +243,54 @@ nl_msg_put_u8(struct ofpbuf *msg, uint16_t type, uint8_t value)
nl_msg_put_unspec(msg, type, &value, sizeof value);
}
/* Appends a Netlink attribute of the given 'type' and the given 16-bit 'value'
* to 'msg'. */
/* Appends a Netlink attribute of the given 'type' and the given 16-bit host
* byte order 'value' to 'msg'. */
void
nl_msg_put_u16(struct ofpbuf *msg, uint16_t type, uint16_t value)
{
nl_msg_put_unspec(msg, type, &value, sizeof value);
}
/* Appends a Netlink attribute of the given 'type' and the given 32-bit 'value'
* to 'msg'. */
/* Appends a Netlink attribute of the given 'type' and the given 32-bit host
* byte order 'value' to 'msg'. */
void
nl_msg_put_u32(struct ofpbuf *msg, uint16_t type, uint32_t value)
{
nl_msg_put_unspec(msg, type, &value, sizeof value);
}
/* Appends a Netlink attribute of the given 'type' and the given 64-bit 'value'
* to 'msg'. */
/* Appends a Netlink attribute of the given 'type' and the given 64-bit host
* byte order 'value' to 'msg'. */
void
nl_msg_put_u64(struct ofpbuf *msg, uint16_t type, uint64_t value)
{
nl_msg_put_unspec(msg, type, &value, sizeof value);
}
/* Appends a Netlink attribute of the given 'type' and the given 16-bit network
* byte order 'value' to 'msg'. */
void
nl_msg_put_be16(struct ofpbuf *msg, uint16_t type, ovs_be16 value)
{
nl_msg_put_unspec(msg, type, &value, sizeof value);
}
/* Appends a Netlink attribute of the given 'type' and the given 32-bit network
* byte order 'value' to 'msg'. */
void
nl_msg_put_be32(struct ofpbuf *msg, uint16_t type, ovs_be32 value)
{
nl_msg_put_unspec(msg, type, &value, sizeof value);
}
/* Appends a Netlink attribute of the given 'type' and the given 64-bit network
* byte order 'value' to 'msg'. */
void
nl_msg_put_be64(struct ofpbuf *msg, uint16_t type, ovs_be64 value)
{
nl_msg_put_unspec(msg, type, &value, sizeof value);
}
/* Appends a Netlink attribute of the given 'type' and the given
* null-terminated string 'value' to 'msg'. */
void
@@ -379,7 +403,7 @@ nl_attr_get_u8(const struct nlattr *nla)
return NL_ATTR_GET_AS(nla, uint8_t);
}
/* Returns the 16-bit value in 'nla''s payload.
/* Returns the 16-bit host byte order value in 'nla''s payload.
*
* Asserts that 'nla''s payload is at least 2 bytes long. */
uint16_t
@@ -388,7 +412,7 @@ nl_attr_get_u16(const struct nlattr *nla)
return NL_ATTR_GET_AS(nla, uint16_t);
}
/* Returns the 32-bit value in 'nla''s payload.
/* Returns the 32-bit host byte order value in 'nla''s payload.
*
* Asserts that 'nla''s payload is at least 4 bytes long. */
uint32_t
@@ -397,7 +421,7 @@ nl_attr_get_u32(const struct nlattr *nla)
return NL_ATTR_GET_AS(nla, uint32_t);
}
/* Returns the 64-bit value in 'nla''s payload.
/* Returns the 64-bit host byte order value in 'nla''s payload.
*
* Asserts that 'nla''s payload is at least 8 bytes long. */
uint64_t
@@ -406,6 +430,33 @@ nl_attr_get_u64(const struct nlattr *nla)
return NL_ATTR_GET_AS(nla, uint64_t);
}
/* Returns the 16-bit network byte order value in 'nla''s payload.
*
* Asserts that 'nla''s payload is at least 2 bytes long. */
ovs_be16
nl_attr_get_be16(const struct nlattr *nla)
{
return NL_ATTR_GET_AS(nla, ovs_be16);
}
/* Returns the 32-bit network byte order value in 'nla''s payload.
*
* Asserts that 'nla''s payload is at least 4 bytes long. */
ovs_be32
nl_attr_get_be32(const struct nlattr *nla)
{
return NL_ATTR_GET_AS(nla, ovs_be32);
}
/* Returns the 64-bit network byte order value in 'nla''s payload.
*
* Asserts that 'nla''s payload is at least 8 bytes long. */
ovs_be64
nl_attr_get_be64(const struct nlattr *nla)
{
return NL_ATTR_GET_AS(nla, ovs_be64);
}
/* Returns the null-terminated string value in 'nla''s payload.
*
* Asserts that 'nla''s payload contains a null-terminated string. */