mbuf: clarify definition of fragment packet types

An IPv4 packet is considered as a fragment if:
- MF (more fragment) bit is set
- or Fragment_Offset field is non-zero

Update the API documentation of packet types to reflect this.

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>

diff --git a/lib/librte_mbuf/rte_mbuf_ptype.h b/lib/librte_mbuf/rte_mbuf_ptype.h
index f19c56c..ff6de9d 100644 (file)
--- a/lib/librte_mbuf/rte_mbuf_ptype.h
+++ b/lib/librte_mbuf/rte_mbuf_ptype.h
@@ -227,7 +227,7 @@ extern "C" {
  *
  * Packet format:
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=6, 'MF'=0>
+ * | 'version'=4, 'protocol'=6, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=6>
@@ -239,7 +239,7 @@ extern "C" {
  *
  * Packet format:
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=17, 'MF'=0>
+ * | 'version'=4, 'protocol'=17, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=17>
@@ -258,6 +258,9 @@ extern "C" {
  * <'ether type'=0x0800
  * | 'version'=4, 'MF'=1>
  * or,
+ * <'ether type'=0x0800
+ * | 'version'=4, 'frag_offset'!=0>
+ * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=44>
  */
@@ -268,7 +271,7 @@ extern "C" {
  *
  * Packet format:
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=132, 'MF'=0>
+ * | 'version'=4, 'protocol'=132, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=132>
@@ -280,7 +283,7 @@ extern "C" {
  *
  * Packet format:
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=1, 'MF'=0>
+ * | 'version'=4, 'protocol'=1, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=1>
@@ -296,7 +299,7 @@ extern "C" {
  *
  * Packet format:
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'!=[6|17|132|1], 'MF'=0>
+ * | 'version'=4, 'protocol'!=[6|17|132|1], 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'!=[6|17|44|132|1]>
@@ -473,7 +476,7 @@ extern "C" {
  *
  * Packet format (inner only):
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=6, 'MF'=0>
+ * | 'version'=4, 'protocol'=6, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=6>
@@ -485,7 +488,7 @@ extern "C" {
  *
  * Packet format (inner only):
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=17, 'MF'=0>
+ * | 'version'=4, 'protocol'=17, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=17>
@@ -499,6 +502,9 @@ extern "C" {
  * <'ether type'=0x0800
  * | 'version'=4, 'MF'=1>
  * or,
+ * <'ether type'=0x0800
+ * | 'version'=4, 'frag_offset'!=0>
+ * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=44>
  */
@@ -509,7 +515,7 @@ extern "C" {
  *
  * Packet format (inner only):
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=132, 'MF'=0>
+ * | 'version'=4, 'protocol'=132, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=132>
@@ -521,7 +527,7 @@ extern "C" {
  *
  * Packet format (inner only):
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'=1, 'MF'=0>
+ * | 'version'=4, 'protocol'=1, 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'=1>
@@ -534,7 +540,7 @@ extern "C" {
  *
  * Packet format (inner only):
  * <'ether type'=0x0800
- * | 'version'=4, 'protocol'!=[6|17|132|1], 'MF'=0>
+ * | 'version'=4, 'protocol'!=[6|17|132|1], 'MF'=0, 'frag_offset'=0>
  * or,
  * <'ether type'=0x86DD
  * | 'version'=6, 'next header'!=[6|17|44|132|1]>