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Diffstat (limited to 'src/vnet/ip/ip4_packet.h')
-rw-r--r--src/vnet/ip/ip4_packet.h64
1 files changed, 64 insertions, 0 deletions
diff --git a/src/vnet/ip/ip4_packet.h b/src/vnet/ip/ip4_packet.h
index c1852fc3ff2..79cf22c4d70 100644
--- a/src/vnet/ip/ip4_packet.h
+++ b/src/vnet/ip/ip4_packet.h
@@ -264,6 +264,70 @@ ip4_header_checksum (ip4_header_t * i)
return csum;
}
+always_inline void
+ip4_header_set_dscp (ip4_header_t * ip4, ip_dscp_t dscp)
+{
+ ip4->tos &= ~0xfc;
+ /* not masking the dscp value to save th instruction
+ * it shouldn't b necessary since the argument is an enum
+ * whose range is therefore constrained in the CP. in the
+ * DP it will have been taken from another packet, so again
+ * constrained in value */
+ ip4->tos |= dscp << IP_PACKET_TC_FIELD_DSCP_BIT_SHIFT;
+}
+
+always_inline void
+ip4_header_set_ecn (ip4_header_t * ip4, ip_ecn_t ecn)
+{
+ ip4->tos &= ~IP_PACKET_TC_FIELD_ECN_MASK;
+ ip4->tos |= ecn;
+}
+
+always_inline void
+ip4_header_set_ecn_w_chksum (ip4_header_t * ip4, ip_ecn_t ecn)
+{
+ ip_csum_t sum = ip4->checksum;
+ u8 old = ip4->tos;
+ u8 new = (old & ~IP_PACKET_TC_FIELD_ECN_MASK) | ecn;
+
+ sum = ip_csum_update (sum, old, new, ip4_header_t, tos);
+ ip4->checksum = ip_csum_fold (sum);
+ ip4->tos = new;
+}
+
+always_inline ip_dscp_t
+ip4_header_get_dscp (const ip4_header_t * ip4)
+{
+ return (ip4->tos >> IP_PACKET_TC_FIELD_DSCP_BIT_SHIFT);
+}
+
+always_inline ip_ecn_t
+ip4_header_get_ecn (const ip4_header_t * ip4)
+{
+ return (ip4->tos & IP_PACKET_TC_FIELD_ECN_MASK);
+}
+
+always_inline void
+ip4_header_set_df (ip4_header_t * ip4)
+{
+ ip4->flags_and_fragment_offset |=
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
+}
+
+always_inline void
+ip4_header_clear_df (ip4_header_t * ip4)
+{
+ ip4->flags_and_fragment_offset &=
+ ~clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT);
+}
+
+always_inline u8
+ip4_header_get_df (ip4_header_t * ip4)
+{
+ return (! !(ip4->flags_and_fragment_offset &
+ clib_host_to_net_u16 (IP4_HEADER_FLAG_DONT_FRAGMENT)));
+}
+
static inline uword
ip4_header_checksum_is_valid (ip4_header_t * i)
{