1 /** 2 * @file 3 * 4 * DHCPv6 client: IPv6 address autoconfiguration as per 5 * RFC 3315 (stateful DHCPv6) and 6 * RFC 3736 (stateless DHCPv6). 7 */ 8 9 /* 10 * Copyright (c) 2018 Simon Goldschmidt 11 * All rights reserved. 12 * 13 * Redistribution and use in source and binary forms, with or without modification, 14 * are permitted provided that the following conditions are met: 15 * 16 * 1. Redistributions of source code must retain the above copyright notice, 17 * this list of conditions and the following disclaimer. 18 * 2. Redistributions in binary form must reproduce the above copyright notice, 19 * this list of conditions and the following disclaimer in the documentation 20 * and/or other materials provided with the distribution. 21 * 3. The name of the author may not be used to endorse or promote products 22 * derived from this software without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 25 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 26 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT 27 * SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 28 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT 29 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 30 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 31 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING 32 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY 33 * OF SUCH DAMAGE. 34 * 35 * This file is part of the lwIP TCP/IP stack. 36 * 37 * Author: Simon Goldschmidt <goldsimon@gmx.de> 38 */ 39 40 #ifndef LWIP_HDR_IP6_DHCP6_H 41 #define LWIP_HDR_IP6_DHCP6_H 42 43 #include "lwip/opt.h" 44 45 #if LWIP_IPV6_DHCP6 /* don't build if not configured for use in lwipopts.h */ 46 47 #include "lwip/err.h" 48 #include "lwip/netif.h" 49 50 #ifdef __cplusplus 51 extern "C" { 52 #endif 53 54 /** period (in milliseconds) of the application calling dhcp6_tmr() */ 55 #define DHCP6_TIMER_MSECS 500 56 57 struct dhcp6 58 { 59 /** transaction identifier of last sent request */ 60 u32_t xid; 61 /** track PCB allocation state */ 62 u8_t pcb_allocated; 63 /** current DHCPv6 state machine state */ 64 u8_t state; 65 /** retries of current request */ 66 u8_t tries; 67 /** if request config is triggered while another action is active, this keeps track of it */ 68 u8_t request_config_pending; 69 /** #ticks with period DHCP6_TIMER_MSECS for request timeout */ 70 u16_t request_timeout; 71 #if LWIP_IPV6_DHCP6_STATEFUL 72 /* @todo: add more members here to keep track of stateful DHCPv6 data, like lease times */ 73 #endif /* LWIP_IPV6_DHCP6_STATEFUL */ 74 }; 75 76 void dhcp6_set_struct(struct netif *netif, struct dhcp6 *dhcp6); 77 /** Remove a struct dhcp6 previously set to the netif using dhcp6_set_struct() */ 78 #define dhcp6_remove_struct(netif) netif_set_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6, NULL) 79 void dhcp6_cleanup(struct netif *netif); 80 81 err_t dhcp6_enable_stateful(struct netif *netif); 82 err_t dhcp6_enable_stateless(struct netif *netif); 83 void dhcp6_disable(struct netif *netif); 84 85 void dhcp6_tmr(void); 86 87 void dhcp6_nd6_ra_trigger(struct netif *netif, u8_t managed_addr_config, u8_t other_config); 88 89 #if LWIP_DHCP6_GET_NTP_SRV 90 /** This function must exist, in other to add offered NTP servers to 91 * the NTP (or SNTP) engine. 92 * See LWIP_DHCP6_MAX_NTP_SERVERS */ 93 extern void dhcp6_set_ntp_servers(u8_t num_ntp_servers, const ip_addr_t* ntp_server_addrs); 94 #endif /* LWIP_DHCP6_GET_NTP_SRV */ 95 96 #define netif_dhcp6_data(netif) ((struct dhcp6*)netif_get_client_data(netif, LWIP_NETIF_CLIENT_DATA_INDEX_DHCP6)) 97 98 #ifdef __cplusplus 99 } 100 #endif 101 102 #endif /* LWIP_IPV6_DHCP6 */ 103 104 #endif /* LWIP_HDR_IP6_DHCP6_H */ 105