192 lines
6.6 KiB
C
192 lines
6.6 KiB
C
/*********************************************************************
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PicoTCP. Copyright (c) 2012-2017 Altran Intelligent Systems. Some rights reserved.
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See COPYING, LICENSE.GPLv2 and LICENSE.GPLv3 for usage.
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.
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*********************************************************************/
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#ifndef INCLUDE_PICO_DHCP_COMMON
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#define INCLUDE_PICO_DHCP_COMMON
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#include "pico_config.h"
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#include "pico_addressing.h"
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#define PICO_DHCPD_PORT (short_be(67))
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#define PICO_DHCP_CLIENT_PORT (short_be(68))
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#define PICO_DHCPD_MAGIC_COOKIE (long_be(0x63825363))
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#define PICO_DHCP_HTYPE_ETH 1
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/* Macro to get DHCP option field */
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#define DHCP_OPT(hdr, off) ((struct pico_dhcp_opt *)(((uint8_t *)hdr) + sizeof(struct pico_dhcp_hdr) + off))
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/* flags */
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#define PICO_DHCP_FLAG_BROADCAST 0x8000
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/* options */
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#define PICO_DHCP_OPT_PAD 0x00
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#define PICO_DHCP_OPT_NETMASK 0x01
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#define PICO_DHCP_OPT_TIME 0x02
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#define PICO_DHCP_OPT_ROUTER 0x03
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#define PICO_DHCP_OPT_DNS 0x06
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#define PICO_DHCP_OPT_HOSTNAME 0x0c
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#define PICO_DHCP_OPT_DOMAINNAME 0x0f
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#define PICO_DHCP_OPT_MTU 0x1a
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#define PICO_DHCP_OPT_BROADCAST 0x1c
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#define PICO_DHCP_OPT_NETBIOSNS 0x2c
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#define PICO_DHCP_OPT_NETBIOSSCOPE 0x2f
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#define PICO_DHCP_OPT_REQIP 0x32
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#define PICO_DHCP_OPT_LEASETIME 0x33
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#define PICO_DHCP_OPT_OPTOVERLOAD 0x34
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#define PICO_DHCP_OPT_MSGTYPE 0x35
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#define PICO_DHCP_OPT_SERVERID 0x36
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#define PICO_DHCP_OPT_PARAMLIST 0x37
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#define PICO_DHCP_OPT_MESSAGE 0x38
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#define PICO_DHCP_OPT_MAXMSGSIZE 0x39
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#define PICO_DHCP_OPT_RENEWALTIME 0x3a
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#define PICO_DHCP_OPT_REBINDINGTIME 0x3b
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#define PICO_DHCP_OPT_VENDORID 0x3c
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#define PICO_DHCP_OPT_CLIENTID 0x3d
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#define PICO_DHCP_OPT_DOMAINSEARCH 0x77
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#define PICO_DHCP_OPT_STATICROUTE 0x79
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#define PICO_DHCP_OPT_END 0xFF
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/* options len */
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#define PICO_DHCP_OPTLEN_HDR 2 /* account for code and len field */
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#define PICO_DHCP_OPTLEN_NETMASK 6
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#define PICO_DHCP_OPTLEN_ROUTER 6
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#define PICO_DHCP_OPTLEN_DNS 6
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#define PICO_DHCP_OPTLEN_BROADCAST 6
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#define PICO_DHCP_OPTLEN_REQIP 6
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#define PICO_DHCP_OPTLEN_LEASETIME 6
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#define PICO_DHCP_OPTLEN_OPTOVERLOAD 3
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#define PICO_DHCP_OPTLEN_MSGTYPE 3
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#define PICO_DHCP_OPTLEN_SERVERID 6
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#define PICO_DHCP_OPTLEN_PARAMLIST 9 /* PicoTCP specific */
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#define PICO_DHCP_OPTLEN_MAXMSGSIZE 4
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#define PICO_DHCP_OPTLEN_RENEWALTIME 6
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#define PICO_DHCP_OPTLEN_REBINDINGTIME 6
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#define PICO_DHCP_OPTLEN_END 1
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/* op codes */
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#define PICO_DHCP_OP_REQUEST 1
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#define PICO_DHCP_OP_REPLY 2
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/* rfc message types */
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#define PICO_DHCP_MSG_DISCOVER 1
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#define PICO_DHCP_MSG_OFFER 2
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#define PICO_DHCP_MSG_REQUEST 3
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#define PICO_DHCP_MSG_DECLINE 4
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#define PICO_DHCP_MSG_ACK 5
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#define PICO_DHCP_MSG_NAK 6
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#define PICO_DHCP_MSG_RELEASE 7
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#define PICO_DHCP_MSG_INFORM 8
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/* custom message types */
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#define PICO_DHCP_EVENT_T1 9
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#define PICO_DHCP_EVENT_T2 10
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#define PICO_DHCP_EVENT_LEASE 11
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#define PICO_DHCP_EVENT_RETRANSMIT 12
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#define PICO_DHCP_EVENT_NONE 0xff
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PACKED_STRUCT_DEF pico_dhcp_hdr
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{
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uint8_t op;
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uint8_t htype;
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uint8_t hlen;
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uint8_t hops; /* zero */
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uint32_t xid; /* store this in the request */
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uint16_t secs; /* ignore */
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uint16_t flags;
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uint32_t ciaddr; /* client address - if asking for renewal */
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uint32_t yiaddr; /* your address (client) */
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uint32_t siaddr; /* dhcp offered address */
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uint32_t giaddr; /* relay agent, bootp. */
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uint8_t hwaddr[6];
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uint8_t hwaddr_padding[10];
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char hostname[64];
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char bootp_filename[128];
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uint32_t dhcp_magic;
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};
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PACKED_STRUCT_DEF pico_dhcp_opt
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{
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uint8_t code;
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uint8_t len;
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PACKED_UNION_DEF dhcp_opt_ext_u {
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PEDANTIC_STRUCT_DEF netmask_s {
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struct pico_ip4 ip;
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} netmask;
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PEDANTIC_STRUCT_DEF router_s {
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struct pico_ip4 ip;
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} router;
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PEDANTIC_STRUCT_DEF dns_s {
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struct pico_ip4 ip;
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} dns1;
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struct dns_s dns2;
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PEDANTIC_STRUCT_DEF broadcast_s {
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struct pico_ip4 ip;
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} broadcast;
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PEDANTIC_STRUCT_DEF req_ip_s {
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struct pico_ip4 ip;
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} req_ip;
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PEDANTIC_STRUCT_DEF lease_time_s {
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uint32_t time;
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} lease_time;
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PEDANTIC_STRUCT_DEF opt_overload_s {
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uint8_t value;
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} opt_overload;
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PEDANTIC_STRUCT_DEF tftp_server_s {
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char name[1];
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} tftp_server;
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PEDANTIC_STRUCT_DEF bootfile_s {
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char name[1];
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} bootfile;
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PEDANTIC_STRUCT_DEF msg_type_s {
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uint8_t type;
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} msg_type;
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PEDANTIC_STRUCT_DEF server_id_s {
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struct pico_ip4 ip;
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} server_id;
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PEDANTIC_STRUCT_DEF param_list_s {
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uint8_t code[1];
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} param_list;
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PEDANTIC_STRUCT_DEF message_s {
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char error[1];
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} message;
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PEDANTIC_STRUCT_DEF max_msg_size_s {
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uint16_t size;
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} max_msg_size;
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PEDANTIC_STRUCT_DEF renewal_time_s {
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uint32_t time;
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} renewal_time;
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PEDANTIC_STRUCT_DEF rebinding_time_s {
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uint32_t time;
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} rebinding_time;
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PEDANTIC_STRUCT_DEF vendor_id_s {
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uint8_t id[1];
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} vendor_id;
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PEDANTIC_STRUCT_DEF client_id_s {
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uint8_t id[1];
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} client_id;
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PEDANTIC_STRUCT_DEF text_s {
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char txt[1];
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} string;
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} ext;
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};
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uint8_t dhcp_get_next_option(uint8_t *begin, uint8_t *data, int *len, uint8_t **nextopt);
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struct pico_dhcp_opt *pico_dhcp_next_option(struct pico_dhcp_opt **ptr);
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uint8_t pico_dhcp_are_options_valid(void *ptr, int32_t len);
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uint8_t pico_dhcp_opt_netmask(void *ptr, struct pico_ip4 *ip);
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uint8_t pico_dhcp_opt_router(void *ptr, struct pico_ip4 *ip);
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uint8_t pico_dhcp_opt_dns(void *ptr, struct pico_ip4 *ip);
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uint8_t pico_dhcp_opt_broadcast(void *ptr, struct pico_ip4 *ip);
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uint8_t pico_dhcp_opt_reqip(void *ptr, struct pico_ip4 *ip);
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uint8_t pico_dhcp_opt_leasetime(void *ptr, uint32_t time);
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uint8_t pico_dhcp_opt_msgtype(void *ptr, uint8_t type);
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uint8_t pico_dhcp_opt_serverid(void *ptr, struct pico_ip4 *ip);
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uint8_t pico_dhcp_opt_paramlist(void *ptr);
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uint8_t pico_dhcp_opt_maxmsgsize(void *ptr, uint16_t size);
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uint8_t pico_dhcp_opt_end(void *ptr);
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#endif
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