mirror of
https://github.com/openvswitch/ovs
synced 2025-08-30 13:58:14 +00:00
fcc3c93f76
See RFC 2131, section 4.3.2. When handling a DHCPREQUEST message, the server should validate that the client's requested IP matches the offered IP. If not, the server should reply with a DHCPNAK. The client's requested IP is either specified as the Requested IP Address (option 50), or as the ciaddr, depending on the client's state. Signed-off-by: Gregory Smith <gasmith@nutanix.com> Signed-off-by: Ben Pfaff <blp@ovn.org>
66 lines
2.3 KiB
C
66 lines
2.3 KiB
C
/*
|
|
* Copyright (c) 2008, 2011 Nicira, Inc.
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at:
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef DHCP_H
|
|
#define DHCP_H 1
|
|
|
|
#include <stdint.h>
|
|
#include "packets.h"
|
|
#include "util.h"
|
|
|
|
/* Ports used by DHCP. */
|
|
#define DHCP_SERVER_PORT 67 /* Port used by DHCP server. */
|
|
#define DHCP_CLIENT_PORT 68 /* Port used by DHCP client. */
|
|
|
|
#define DHCP_MAGIC_COOKIE 0x63825363
|
|
|
|
#define DHCP_HEADER_LEN 236
|
|
OVS_PACKED(
|
|
struct dhcp_header {
|
|
uint8_t op; /* DHCP_BOOTREQUEST or DHCP_BOOTREPLY. */
|
|
uint8_t htype; /* ARP_HRD_ETHERNET (typically). */
|
|
uint8_t hlen; /* ETH_ADDR_LEN (typically). */
|
|
uint8_t hops; /* Hop count; set to 0 by client. */
|
|
ovs_be32 xid; /* Transaction ID. */
|
|
ovs_be16 secs; /* Since client started address acquisition. */
|
|
ovs_be16 flags; /* DHCP_FLAGS_*. */
|
|
ovs_be32 ciaddr; /* Client IP, if it has a lease for one. */
|
|
ovs_be32 yiaddr; /* Client ("your") IP address. */
|
|
ovs_be32 siaddr; /* Next server IP address. */
|
|
ovs_be32 giaddr; /* Relay agent IP address. */
|
|
uint8_t chaddr[16]; /* Client hardware address. */
|
|
char sname[64]; /* Optional server host name. */
|
|
char file[128]; /* Boot file name. */
|
|
/* Followed by variable-length options field. */
|
|
});
|
|
BUILD_ASSERT_DECL(DHCP_HEADER_LEN == sizeof(struct dhcp_header));
|
|
|
|
#define DHCP_OP_REQUEST 1
|
|
#define DHCP_OP_REPLY 2
|
|
|
|
#define DHCP_MSG_DISCOVER 1
|
|
#define DHCP_MSG_OFFER 2
|
|
#define DHCP_MSG_REQUEST 3
|
|
#define DHCP_MSG_ACK 5
|
|
#define DHCP_MSG_NAK 6
|
|
|
|
#define DHCP_OPT_PAD 0
|
|
#define DHCP_OPT_REQ_IP 50
|
|
#define DHCP_OPT_MSG_TYPE 53
|
|
#define DHCP_OPT_END 255
|
|
|
|
#endif /* dhcp.h */
|