diff options
Diffstat (limited to 'lwip/src/include/lwip/dhcp.h')
| -rw-r--r-- | lwip/src/include/lwip/dhcp.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/lwip/src/include/lwip/dhcp.h b/lwip/src/include/lwip/dhcp.h new file mode 100644 index 0000000..c78aa0b --- /dev/null +++ b/lwip/src/include/lwip/dhcp.h @@ -0,0 +1,139 @@ +/** + * @file + * DHCP client API + */ + +/* + * 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_DHCP_H +#define LWIP_HDR_DHCP_H + +#include "lwip/opt.h" + +#if LWIP_DHCP /* don't build if not configured for use in lwipopts.h */ + +#include "lwip/netif.h" +#include "lwip/udp.h" + +#ifdef __cplusplus +extern "C" { +#endif + +/** period (in seconds) of the application calling dhcp_coarse_tmr() */ +#define DHCP_COARSE_TIMER_SECS 60 +/** period (in milliseconds) of the application calling dhcp_coarse_tmr() */ +#define DHCP_COARSE_TIMER_MSECS (DHCP_COARSE_TIMER_SECS * 1000UL) +/** period (in milliseconds) of the application calling dhcp_fine_tmr() */ +#define DHCP_FINE_TIMER_MSECS 500 + +#define DHCP_BOOT_FILE_LEN 128U + +/* AutoIP cooperation flags (struct dhcp.autoip_coop_state) */ +typedef enum { + DHCP_AUTOIP_COOP_STATE_OFF = 0, + DHCP_AUTOIP_COOP_STATE_ON = 1 +} dhcp_autoip_coop_state_enum_t; + +struct dhcp +{ + /** transaction identifier of last sent request */ + u32_t xid; + /** track PCB allocation state */ + u8_t pcb_allocated; + /** current DHCP state machine state */ + u8_t state; + /** retries of current request */ + u8_t tries; +#if LWIP_DHCP_AUTOIP_COOP + u8_t autoip_coop_state; +#endif + u8_t subnet_mask_given; + + u16_t request_timeout; /* #ticks with period DHCP_FINE_TIMER_SECS for request timeout */ + u16_t t1_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for renewal time */ + u16_t t2_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for rebind time */ + u16_t t1_renew_time; /* #ticks with period DHCP_COARSE_TIMER_SECS until next renew try */ + u16_t t2_rebind_time; /* #ticks with period DHCP_COARSE_TIMER_SECS until next rebind try */ + u16_t lease_used; /* #ticks with period DHCP_COARSE_TIMER_SECS since last received DHCP ack */ + u16_t t0_timeout; /* #ticks with period DHCP_COARSE_TIMER_SECS for lease time */ + ip_addr_t server_ip_addr; /* dhcp server address that offered this lease (ip_addr_t because passed to UDP) */ + ip4_addr_t offered_ip_addr; + ip4_addr_t offered_sn_mask; + ip4_addr_t offered_gw_addr; + + u32_t offered_t0_lease; /* lease period (in seconds) */ + u32_t offered_t1_renew; /* recommended renew time (usually 50% of lease period) */ + u32_t offered_t2_rebind; /* recommended rebind time (usually 87.5 of lease period) */ +#if LWIP_DHCP_BOOTP_FILE + ip4_addr_t offered_si_addr; + char boot_file_name[DHCP_BOOT_FILE_LEN]; +#endif /* LWIP_DHCP_BOOTPFILE */ +}; + + +void dhcp_set_struct(struct netif *netif, struct dhcp *dhcp); +/** Remove a struct dhcp previously set to the netif using dhcp_set_struct() */ +#define dhcp_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP, NULL) +void dhcp_cleanup(struct netif *netif); +err_t dhcp_start(struct netif *netif); +err_t dhcp_renew(struct netif *netif); +err_t dhcp_release(struct netif *netif); +void dhcp_stop(struct netif *netif); +void dhcp_release_and_stop(struct netif *netif); +void dhcp_inform(struct netif *netif); +void dhcp_network_changed(struct netif *netif); +#if DHCP_DOES_ARP_CHECK +void dhcp_arp_reply(struct netif *netif, const ip4_addr_t *addr); +#endif +u8_t dhcp_supplied_address(const struct netif *netif); +/* to be called every minute */ +void dhcp_coarse_tmr(void); +/* to be called every half second */ +void dhcp_fine_tmr(void); + +#if LWIP_DHCP_GET_NTP_SRV +/** This function must exist, in other to add offered NTP servers to + * the NTP (or SNTP) engine. + * See LWIP_DHCP_MAX_NTP_SERVERS */ +extern void dhcp_set_ntp_servers(u8_t num_ntp_servers, const ip4_addr_t* ntp_server_addrs); +#endif /* LWIP_DHCP_GET_NTP_SRV */ + +#define netif_dhcp_data(netif) ((struct dhcp*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP)) + +#ifdef __cplusplus +} +#endif + +#endif /* LWIP_DHCP */ + +#endif /*LWIP_HDR_DHCP_H*/ |