dhcp4:(VPP-1483) linearize chained packets before handling
dhcp packets might (when flooded) arrive in chains of cloned buffers
Change-Id: Ifddecd656b6a5d6ba8cd94184f5c021684e35548
Signed-off-by: Eyal Bari <ebari@cisco.com>
diff --git a/src/vnet/dhcp/dhcp4_packet.h b/src/vnet/dhcp/dhcp4_packet.h
index 9fbeb02..3076dd9 100644
--- a/src/vnet/dhcp/dhcp4_packet.h
+++ b/src/vnet/dhcp/dhcp4_packet.h
@@ -21,6 +21,17 @@
typedef struct
{
+ u8 option;
+ u8 length;
+ union
+ {
+ u8 data[0];
+ u32 data_as_u32[0];
+ };
+} __attribute__ ((packed)) dhcp_option_t;
+
+typedef struct
+{
u8 opcode; /* 1 = request, 2 = reply */
u8 hardware_type; /* 1 = ethernet */
u8 hardware_address_length;
@@ -37,20 +48,9 @@
u8 server_name[64];
u8 boot_filename[128];
ip4_address_t magic_cookie;
- u8 options[0];
+ dhcp_option_t options[0];
} dhcp_header_t;
-typedef struct
-{
- u8 option;
- u8 length;
- union
- {
- u8 data[0];
- u32 data_as_u32[0];
- };
-} __attribute__ ((packed)) dhcp_option_t;
-
typedef enum
{
DHCP_PACKET_DISCOVER = 1,
@@ -63,6 +63,7 @@
typedef enum dhcp_packet_option_t_
{
DHCP_PACKET_OPTION_MSG_TYPE = 53,
+ DHCP_PACKET_OPTION_END = 0xff,
} dhcp_packet_option_t;
/* charming antique: 99.130.83.99 is the dhcp magic cookie */