diff options
Diffstat (limited to 'lwip/src/include/lwip/prot/dhcp.h')
| -rw-r--r-- | lwip/src/include/lwip/prot/dhcp.h | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/lwip/src/include/lwip/prot/dhcp.h b/lwip/src/include/lwip/prot/dhcp.h new file mode 100644 index 0000000..ab18dca --- /dev/null +++ b/lwip/src/include/lwip/prot/dhcp.h @@ -0,0 +1,178 @@ +/** + * @file + * DHCP protocol definitions + */ + +/* + * Copyright (c) 2001-2004 Leon Woestenberg <leon.woestenberg@gmx.net> + * Copyright (c) 2001-2004 Axon Digital Design B.V., The Netherlands. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without modification, + * are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * 3. The name of the author may not be used to endorse or promote products + * derived from this software without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED + * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT + * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, + * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT + * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING + * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY + * OF SUCH DAMAGE. + * + * This file is part of the lwIP TCP/IP stack. + * + * Author: Leon Woestenberg <leon.woestenberg@gmx.net> + * + */ +#ifndef LWIP_HDR_PROT_DHCP_H +#define LWIP_HDR_PROT_DHCP_H + +#include "lwip/opt.h" +#include "lwip/arch.h" +#include "lwip/prot/ip4.h" + +#ifdef __cplusplus +extern "C" { +#endif + + /* DHCP message item offsets and length */ +#define DHCP_CHADDR_LEN 16U +#define DHCP_SNAME_OFS 44U +#define DHCP_SNAME_LEN 64U +#define DHCP_FILE_OFS 108U +#define DHCP_FILE_LEN 128U +#define DHCP_MSG_LEN 236U +#define DHCP_OPTIONS_OFS (DHCP_MSG_LEN + 4U) /* 4 byte: cookie */ + +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/bpstruct.h" +#endif +PACK_STRUCT_BEGIN +/** minimum set of fields of any DHCP message */ +struct dhcp_msg +{ + PACK_STRUCT_FLD_8(u8_t op); + PACK_STRUCT_FLD_8(u8_t htype); + PACK_STRUCT_FLD_8(u8_t hlen); + PACK_STRUCT_FLD_8(u8_t hops); + PACK_STRUCT_FIELD(u32_t xid); + PACK_STRUCT_FIELD(u16_t secs); + PACK_STRUCT_FIELD(u16_t flags); + PACK_STRUCT_FLD_S(ip4_addr_p_t ciaddr); + PACK_STRUCT_FLD_S(ip4_addr_p_t yiaddr); + PACK_STRUCT_FLD_S(ip4_addr_p_t siaddr); + PACK_STRUCT_FLD_S(ip4_addr_p_t giaddr); + PACK_STRUCT_FLD_8(u8_t chaddr[DHCP_CHADDR_LEN]); + PACK_STRUCT_FLD_8(u8_t sname[DHCP_SNAME_LEN]); + PACK_STRUCT_FLD_8(u8_t file[DHCP_FILE_LEN]); + PACK_STRUCT_FIELD(u32_t cookie); +#define DHCP_MIN_OPTIONS_LEN 68U +/** make sure user does not configure this too small */ +#if ((defined(DHCP_OPTIONS_LEN)) && (DHCP_OPTIONS_LEN < DHCP_MIN_OPTIONS_LEN)) +# undef DHCP_OPTIONS_LEN +#endif +/** allow this to be configured in lwipopts.h, but not too small */ +#if (!defined(DHCP_OPTIONS_LEN)) +/** set this to be sufficient for your options in outgoing DHCP msgs */ +# define DHCP_OPTIONS_LEN DHCP_MIN_OPTIONS_LEN +#endif + PACK_STRUCT_FLD_8(u8_t options[DHCP_OPTIONS_LEN]); +} PACK_STRUCT_STRUCT; +PACK_STRUCT_END +#ifdef PACK_STRUCT_USE_INCLUDES +# include "arch/epstruct.h" +#endif + + +/* DHCP client states */ +typedef enum { + DHCP_STATE_OFF = 0, + DHCP_STATE_REQUESTING = 1, + DHCP_STATE_INIT = 2, + DHCP_STATE_REBOOTING = 3, + DHCP_STATE_REBINDING = 4, + DHCP_STATE_RENEWING = 5, + DHCP_STATE_SELECTING = 6, + DHCP_STATE_INFORMING = 7, + DHCP_STATE_CHECKING = 8, + DHCP_STATE_PERMANENT = 9, /* not yet implemented */ + DHCP_STATE_BOUND = 10, + DHCP_STATE_RELEASING = 11, /* not yet implemented */ + DHCP_STATE_BACKING_OFF = 12 +} dhcp_state_enum_t; + +/* DHCP op codes */ +#define DHCP_BOOTREQUEST 1 +#define DHCP_BOOTREPLY 2 + +/* DHCP message types */ +#define DHCP_DISCOVER 1 +#define DHCP_OFFER 2 +#define DHCP_REQUEST 3 +#define DHCP_DECLINE 4 +#define DHCP_ACK 5 +#define DHCP_NAK 6 +#define DHCP_RELEASE 7 +#define DHCP_INFORM 8 + +#define DHCP_MAGIC_COOKIE 0x63825363UL + +/* This is a list of options for BOOTP and DHCP, see RFC 2132 for descriptions */ + +/* BootP options */ +#define DHCP_OPTION_PAD 0 +#define DHCP_OPTION_SUBNET_MASK 1 /* RFC 2132 3.3 */ +#define DHCP_OPTION_ROUTER 3 +#define DHCP_OPTION_DNS_SERVER 6 +#define DHCP_OPTION_HOSTNAME 12 +#define DHCP_OPTION_IP_TTL 23 +#define DHCP_OPTION_MTU 26 +#define DHCP_OPTION_BROADCAST 28 +#define DHCP_OPTION_TCP_TTL 37 +#define DHCP_OPTION_NTP 42 +#define DHCP_OPTION_END 255 + +/* DHCP options */ +#define DHCP_OPTION_REQUESTED_IP 50 /* RFC 2132 9.1, requested IP address */ +#define DHCP_OPTION_LEASE_TIME 51 /* RFC 2132 9.2, time in seconds, in 4 bytes */ +#define DHCP_OPTION_OVERLOAD 52 /* RFC2132 9.3, use file and/or sname field for options */ + +#define DHCP_OPTION_MESSAGE_TYPE 53 /* RFC 2132 9.6, important for DHCP */ +#define DHCP_OPTION_MESSAGE_TYPE_LEN 1 + +#define DHCP_OPTION_SERVER_ID 54 /* RFC 2132 9.7, server IP address */ +#define DHCP_OPTION_PARAMETER_REQUEST_LIST 55 /* RFC 2132 9.8, requested option types */ + +#define DHCP_OPTION_MAX_MSG_SIZE 57 /* RFC 2132 9.10, message size accepted >= 576 */ +#define DHCP_OPTION_MAX_MSG_SIZE_LEN 2 + +#define DHCP_OPTION_T1 58 /* T1 renewal time */ +#define DHCP_OPTION_T2 59 /* T2 rebinding time */ +#define DHCP_OPTION_US 60 +#define DHCP_OPTION_CLIENT_ID 61 +#define DHCP_OPTION_TFTP_SERVERNAME 66 +#define DHCP_OPTION_BOOTFILE 67 + +/* possible combinations of overloading the file and sname fields with options */ +#define DHCP_OVERLOAD_NONE 0 +#define DHCP_OVERLOAD_FILE 1 +#define DHCP_OVERLOAD_SNAME 2 +#define DHCP_OVERLOAD_SNAME_FILE 3 + + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_HDR_PROT_DHCP_H */ |