In this patch we have added following new APIs.
NlMsgAlignSize => Aligns the size of netlink message.
NlMsgSetSize => Sets the value of nlmsgLen.
Signed-off-by: Ankur Sharma <ankursha...@vmware.com>
---
datapath-windows/ovsext/Netlink/Netlink.c | 54 +++++++++++++++++++++++++++++++
datapath-windows/ovsext/Netlink/Netlink.h | 5 +++
2 files changed, 59 insertions(+)
diff --git a/datapath-windows/ovsext/Netlink/Netlink.c
b/datapath-windows/ovsext/Netlink/Netlink.c
index 0c4f847..df287de 100644
--- a/datapath-windows/ovsext/Netlink/Netlink.c
+++ b/datapath-windows/ovsext/Netlink/Netlink.c
@@ -75,6 +75,37 @@ done:
return writeOk ? STATUS_SUCCESS : STATUS_INVALID_BUFFER_SIZE;
}
+NTSTATUS
+NlFillNlHdr(PNL_BUFFER nlBuf, UINT16 nlmsgType,
+ UINT16 nlmsgFlags, UINT32 nlmsgSeq,
+ UINT32 nlmsgPid)
+{
+ BOOLEAN writeOk;
+ PNL_MSG_HDR nlMsg;
+ NL_MSG_HDR msgOut;
+ UINT32 offset = NlBufSize(nlBuf);
+
+ ASSERT(NlBufAt(nlBuf, offset, sizeof(struct _NL_MSG_HDR)) != 0);
+
+ msgOut.nlmsgType = nlmsgType;
+ msgOut.nlmsgFlags = nlmsgFlags;
+ msgOut.nlmsgSeq = nlmsgSeq;
+ msgOut.nlmsgPid = nlmsgPid;
+
+ writeOk = NlMsgPutTail(nlBuf, (PCHAR)(&msgOut),
+ sizeof(struct _NL_MSG_HDR));
+
+ if (!writeOk) {
+ goto done;
+ }
+
+ nlMsg = (PNL_MSG_HDR)NlBufAt(nlBuf, offset, sizeof(struct _NL_MSG_HDR));
+ nlMsg->nlmsgLen = sizeof(struct _NL_MSG_HDR);
+
+done:
+ return writeOk ? STATUS_SUCCESS : STATUS_INVALID_BUFFER_SIZE;
+}
+
/*
* ---------------------------------------------------------------------------
* Adds Netlink Header to the NL_BUF.
@@ -554,6 +585,29 @@ NlMsgSize(const PNL_MSG_HDR nlh)
/*
* ---------------------------------------------------------------------------
+ * Aligns the size of Netlink message.
+ * ---------------------------------------------------------------------------
+ */
+VOID
+NlMsgAlignSize(const PNL_MSG_HDR nlh)
+{
+ nlh->nlmsgLen = NLMSG_ALIGN(nlh->nlmsgLen);
+ return;
+}
+
+/*
+ * ---------------------------------------------------------------------------
+ * Sets the size of Netlink message.
+ * ---------------------------------------------------------------------------
+ */
+VOID
+NlMsgSetSize(const PNL_MSG_HDR nlh, UINT32 msgLen)
+{
+ nlh->nlmsgLen = msgLen;
+}
+
+/*
+ * ---------------------------------------------------------------------------
* Returns pointer to nlmsg payload.
* ---------------------------------------------------------------------------
*/
diff --git a/datapath-windows/ovsext/Netlink/Netlink.h
b/datapath-windows/ovsext/Netlink/Netlink.h
index 26772b7..cd55647 100644
--- a/datapath-windows/ovsext/Netlink/Netlink.h
+++ b/datapath-windows/ovsext/Netlink/Netlink.h
@@ -82,10 +82,15 @@ NTSTATUS NlFillOvsMsg(PNL_BUFFER nlBuf,
UINT16 nlmsgType, UINT16 nlmsgFlags,
UINT32 nlmsgSeq, UINT32 nlmsgPid,
UINT8 genlCmd, UINT8 genlVer, UINT32 dpNo);
+NTSTATUS NlFillNlHdr(PNL_BUFFER nlBuf,
+ UINT16 nlmsgType, UINT16 nlmsgFlags,
+ UINT32 nlmsgSeq, UINT32 nlmsgPid);
/* Netlink message accessing the payload */
PVOID NlMsgAt(const PNL_MSG_HDR nlh, UINT32 offset);
UINT32 NlMsgSize(const PNL_MSG_HDR nlh);
+VOID NlMsgAlignSize(const PNL_MSG_HDR nlh);
+VOID NlMsgSetSize(const PNL_MSG_HDR nlh, UINT32 msgLen);
PCHAR NlHdrPayload(const PNL_MSG_HDR nlh);
UINT32 NlHdrPayloadLen(const PNL_MSG_HDR nlh);
PNL_ATTR NlMsgAttrs(const PNL_MSG_HDR nlh);
--
1.9.1
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