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dp-packet: Add 'dp_packet_l3_size()'.

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The new api will be used in a subsequent patch.

Signed-off-by: Darrell Ball <dlu998@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>
This commit is contained in:
Darrell Ball
2019-02-04 16:23:06 -08:00
committed by Ben Pfaff
parent 78a0b2721f
commit 69c45b36bc
1 changed files with 14 additions and 1 deletions
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15
lib/dp-packet.h
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@@ -352,10 +352,23 @@ dp_packet_set_l4(struct dp_packet *b, void *l4)
b->l4_ofs = l4 ? (char *) l4 - (char *) dp_packet_data(b) : UINT16_MAX;
}
/* Returns the size of the packet from the beginning of the L3 header to the
* end of the L3 payload. Hence L2 padding is not included. */
static inline size_t
dp_packet_l3_size(const struct dp_packet *b)
{
return OVS_LIKELY(b->l3_ofs != UINT16_MAX)
? (const char *)dp_packet_tail(b) - (const char *)dp_packet_l3(b)
- dp_packet_l2_pad_size(b)
: 0;
}
/* Returns the size of the packet from the beginning of the L4 header to the
* end of the L4 payload. Hence L2 padding is not included. */
static inline size_t
dp_packet_l4_size(const struct dp_packet *b)
{
return b->l4_ofs != UINT16_MAX
return OVS_LIKELY(b->l4_ofs != UINT16_MAX)
? (const char *)dp_packet_tail(b) - (const char *)dp_packet_l4(b)
- dp_packet_l2_pad_size(b)
: 0;