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dhcp6.h
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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 */
opt.h
lwIP Options Configuration
netif.h
netif API (to be used from TCPIP thread)
err.h
lwIP Error codes
netif
Generic data structure used for all lwIP network interfaces.
Definition: ppp_service_if.h:157
nsapi_addr
IP address structure for passing IP addresses by value.
Definition: nsapi_types.h:235
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