Commit-ID: 898c648b71e713f64b5912c070fb362932c1b561
Gitweb: http://git.kernel.org/tip/898c648b71e713f64b5912c070fb362932c1b561
Author: Asias He <asias.hejun@xxxxxxxxx>
AuthorDate: Sun, 17 Jul 2011 16:56:52 +0800
Committer: Pekka Enberg <penberg@xxxxxxxxxx>
CommitDate: Mon, 18 Jul 2011 13:09:59 +0300
kvm tools: Add helpers to tell the type of a DHCP message
If DHCP DISCOVER or DHCP REQUEST is found, reply with DHCP OFFER or DHCP
ACK respectively.
Signed-off-by: Asias He <asias.hejun@xxxxxxxxx>
Signed-off-by: Pekka Enberg <penberg@xxxxxxxxxx>
---
tools/kvm/include/kvm/uip.h | 6 ++++++
tools/kvm/net/uip/dhcp.c | 14 ++++++++++++++
2 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/tools/kvm/include/kvm/uip.h b/tools/kvm/include/kvm/uip.h
index 7c84dea..6534c7f 100644
--- a/tools/kvm/include/kvm/uip.h
+++ b/tools/kvm/include/kvm/uip.h
@@ -38,6 +38,12 @@
#define UIP_DHCP_MAGIC_COOKIE 0x63825363
#define UIP_DHCP_MAGIC_COOKIE_LEN 4
#define UIP_DHCP_OPTION_LEN (UIP_DHCP_VENDOR_SPECIFIC_LEN - UIP_DHCP_MAGIC_COOKIE_LEN)
+#define UIP_DHCP_DISCOVER 1
+#define UIP_DHCP_OFFER 2
+#define UIP_DHCP_REQUEST 3
+#define UIP_DHCP_ACK 5
+#define UIP_DHCP_TAG_MSG_TYPE 53
+#define UIP_DHCP_TAG_MSG_TYPE_LEN 1
/*
* IP package maxium len == 64 KBytes
* IP header == 20 Bytes
diff --git a/tools/kvm/net/uip/dhcp.c b/tools/kvm/net/uip/dhcp.c
index af0407f..0a6293a 100644
--- a/tools/kvm/net/uip/dhcp.c
+++ b/tools/kvm/net/uip/dhcp.c
@@ -1,5 +1,19 @@
#include "kvm/uip.h"
+static inline bool uip_dhcp_is_discovery(struct uip_dhcp *dhcp)
+{
+ return (dhcp->option[2] == UIP_DHCP_DISCOVER &&
+ dhcp->option[1] == UIP_DHCP_TAG_MSG_TYPE_LEN &&
+ dhcp->option[0] == UIP_DHCP_TAG_MSG_TYPE);
+}
+
+static inline bool uip_dhcp_is_request(struct uip_dhcp *dhcp)
+{
+ return (dhcp->option[2] == UIP_DHCP_REQUEST &&
+ dhcp->option[1] == UIP_DHCP_TAG_MSG_TYPE_LEN &&
+ dhcp->option[0] == UIP_DHCP_TAG_MSG_TYPE);
+}
+
bool uip_udp_is_dhcp(struct uip_udp *udp)
{
struct uip_dhcp *dhcp;
--
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