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Add IP::fragment_offset and IP::flags

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This commit is contained in:
Matias Fontanini
2015-12-07 21:10:41 -08:00
parent 35d5045db4
commit 3e23bcc73c
4 changed files with 103 additions and 18 deletions
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62
include/tins/ip.h
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@@ -68,6 +68,15 @@ namespace Tins {
*/
typedef IPv4Address address_type;
/**
* Type used to represent the different IP flags.
*/
enum Flags {
FLAG_RESERVED = 4,
DONT_FRAGMENT = 2,
MORE_FRAGMENTS = 1
};
/**
* \brief Enum indicating the option's class.
*
@@ -292,10 +301,36 @@ namespace Tins {
/**
* \brief Getter for the fragment offset field.
*
* This method is deprecated. Use IP::fragment_offset and IP::flags.
*
* \deprecated
* \return The fragment offset for this IP PDU.
* \sa IP::fragment_offset
* \sa IP::flags
*/
uint16_t frag_off() const { return Endian::be_to_host(_ip.frag_off); }
TINS_DEPRECATED(uint16_t frag_off() const) { return Endian::be_to_host(_ip.frag_off); }
/**
* \brief Getter for the fragment offset field.
*
* This will return the fragment offset field, as present in the packet,
* which indicates the offset of this fragment in blocks of 8 bytes.
*
* \return The fragment offset, measured in units of 8 byte blocks
*/
small_uint<13> fragment_offset() const {
return Endian::be_to_host(_ip.frag_off) & 0x1fff;
}
/**
* \brief Getter for the flags field.
*
* \return The IP flags field
*/
Flags flags() const {
return static_cast<Flags>((_ip.frag_off & 0xe0) >> 5);
}
/**
* \brief Getter for the time to live field.
@@ -362,9 +397,32 @@ namespace Tins {
/**
* \brief Setter for the fragment offset field.
*
* This method is deprecated. Use IP::fragment_offset and IP::flags.
*
* \deprecated
* \param new_frag_off The new fragment offset.
* \sa IP::fragment_offset
* \sa IP::flags
*/
void frag_off(uint16_t new_frag_off);
TINS_DEPRECATED(void frag_off(uint16_t new_frag_off));
/**
* \brief Setter for the fragment offset field.
*
* The value provided is measured in units of 8 byte blocks. This means that
* if you want this packet to have a fragment offset of <i>X</i>,
* you need to provide <i>X / 8</i> as the argument to this method.
*
* \param new_frag_off The new fragment offset, measured in units of 8 byte blocks.
*/
void fragment_offset(small_uint<13> new_frag_off);
/**
* \brief Setter for the flags field.
*
* \param new_flags The new IP flags field value.
*/
void flags(Flags new_flags);
/**
* \brief Setter for the time to live field.