/**
* Copyright (C) 2012-2014 Steven Barth <steven@midlink.org>
+ * Copyright (C) 2018 Hans Dedecker <dedeckeh@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License v2 as published by
#define _unused __attribute__((unused))
#define _packed __attribute__((packed))
+#define _aligned(n) __attribute__((aligned(n)))
#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
#define ND_OPT_RECURSIVE_DNS 25
#define ND_OPT_DNSSL 31
-#define DHCPV6_SOL_MAX_RT 3600
+#define DHCPV6_SOL_MAX_RT 120
#define DHCPV6_REQ_MAX_RT 30
#define DHCPV6_CNF_MAX_RT 4
#define DHCPV6_REN_MAX_RT 600
#define DHCPV6_REB_MAX_RT 600
-#define DHCPV6_INF_MAX_RT 3600
+#define DHCPV6_INF_MAX_RT 120
-#define DEFAULT_MIN_UPDATE_INTERVAL 30
+#define RA_MIN_ADV_INTERVAL 3 /* RFC 4861 paragraph 6.2.1 */
enum dhcvp6_opt {
DHCPV6_OPT_CLIENTID = 1,
DHCPV6_OPT_RAPID_COMMIT = 14,
DHCPV6_OPT_USER_CLASS = 15,
DHCPV6_OPT_VENDOR_CLASS = 16,
+ DHCPV6_OPT_INTERFACE_ID = 18,
DHCPV6_OPT_RECONF_MESSAGE = 19,
DHCPV6_OPT_RECONF_ACCEPT = 20,
DHCPV6_OPT_DNS_SERVERS = 23,
DHCPV6_OPT_PD_EXCLUDE = 67,
DHCPV6_OPT_SOL_MAX_RT = 82,
DHCPV6_OPT_INF_MAX_RT = 83,
-#ifdef EXT_PREFIX_CLASS
- /* draft-bhandari-dhc-class-based-prefix, not yet standardized */
- DHCPV6_OPT_PREFIX_CLASS = EXT_PREFIX_CLASS,
-#endif
#ifdef EXT_CER_ID
/* draft-donley-dhc-cer-id-option-03 */
DHCPV6_OPT_CER_ID = EXT_CER_ID,
};
typedef int(reply_handler)(enum dhcpv6_msg orig, const int rc,
- const void *opt, const void *end);
+ const void *opt, const void *end, const struct sockaddr_in6 *from);
// retransmission strategy
struct dhcpv6_retx {
struct dhcpv6_cer_id {
uint16_t type;
uint16_t len;
- uint16_t reserved;
- uint16_t auth_type;
- uint8_t auth[16];
struct in6_addr addr;
} _packed;
int16_t preference;
uint8_t duid_len;
uint8_t duid[130];
+ struct in6_addr server_addr;
uint32_t sol_max_rt;
uint32_t inf_max_rt;
void *ia_na;
STATE_CLIENT_ID,
STATE_SERVER_ID,
STATE_SERVER_CAND,
+ STATE_SERVER_ADDR,
STATE_ORO,
STATE_DNS,
STATE_SEARCH,
STATE_RA_ROUTE,
STATE_RA_PREFIX,
STATE_RA_DNS,
+ STATE_RA_SEARCH,
STATE_AFTR_NAME,
- STATE_VENDORCLASS,
- STATE_USERCLASS,
+ STATE_OPTS,
STATE_CER,
STATE_S46_MAPT,
STATE_S46_MAPE,
DHCPV6_STATEFUL
};
+enum ra_config {
+ RA_RDNSS_DEFAULT_LIFETIME = 1,
+};
+
enum odhcp6c_ia_mode {
IA_MODE_NONE,
IA_MODE_TRY,
struct odhcp6c_entry {
struct in6_addr router;
- uint16_t length;
+ uint8_t auxlen;
+ uint8_t length;
int16_t priority;
struct in6_addr target;
uint32_t valid;
uint32_t preferred;
uint32_t t1;
uint32_t t2;
- uint16_t class;
uint32_t iaid;
+ uint8_t auxtarget[];
};
+// Include padding after auxtarget to align the next entry
+#define odhcp6c_entry_size(entry) \
+ (sizeof(struct odhcp6c_entry) + (((entry)->auxlen + 3) & ~3))
+
+#define odhcp6c_next_entry(entry) \
+ ((struct odhcp6c_entry *)((uint8_t *)(entry) + odhcp6c_entry_size(entry)))
+
+
struct odhcp6c_request_prefix {
uint32_t iaid;
uint16_t length;
};
+enum odhcp6c_opt_flags {
+ OPT_U8 = 0,
+ OPT_IP6,
+ OPT_STR,
+ OPT_DNS_STR,
+ OPT_USER_CLASS,
+ OPT_MASK_SIZE = 0x0F,
+ OPT_ARRAY = 0x10,
+ OPT_INTERNAL = 0x20,
+ OPT_NO_PASSTHRU = 0x40,
+};
+
+struct odhcp6c_opt {
+ uint16_t code;
+ uint8_t flags;
+ const char *str;
+};
+
int init_dhcpv6(const char *ifname, unsigned int client_options, int sol_timeout);
-void dhcpv6_set_ia_mode(enum odhcp6c_ia_mode na, enum odhcp6c_ia_mode pd);
+int dhcpv6_set_ia_mode(enum odhcp6c_ia_mode na, enum odhcp6c_ia_mode pd);
int dhcpv6_request(enum dhcpv6_msg type);
int dhcpv6_poll_reconfigure(void);
int dhcpv6_promote_server_cand(void);
int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,
uint32_t pref, uint32_t valid);
+int ra_get_hoplimit(void);
+int ra_get_mtu(void);
+int ra_get_reachable(void);
+int ra_get_retransmit(void);
+
int script_init(const char *path, const char *ifname);
ssize_t script_unhexlify(uint8_t *dst, size_t len, const char *src);
-void script_call(const char *status);
-void script_delay_call(const char *status, int timeout);
+void script_call(const char *status, int delay, bool resume);
bool odhcp6c_signal_process(void);
uint64_t odhcp6c_get_milli_time(void);
-void odhcp6c_random(void *buf, size_t len);
+int odhcp6c_random(void *buf, size_t len);
bool odhcp6c_is_bound(void);
+bool odhcp6c_addr_in_scope(const struct in6_addr *addr);
// State manipulation
void odhcp6c_clear_state(enum odhcp6c_state state);
-void odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len);
+int odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len);
void odhcp6c_append_state(enum odhcp6c_state state, const void *data, size_t len);
-void odhcp6c_insert_state(enum odhcp6c_state state, size_t offset, const void *data, size_t len);
+int odhcp6c_insert_state(enum odhcp6c_state state, size_t offset, const void *data, size_t len);
size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len);
void* odhcp6c_move_state(enum odhcp6c_state state, size_t *len);
void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len);
// Entry manipulation
-struct odhcp6c_entry* odhcp6c_find_entry(enum odhcp6c_state state, const struct odhcp6c_entry *new);
-bool odhcp6c_update_entry(enum odhcp6c_state state, struct odhcp6c_entry *new);
-bool odhcp6c_update_entry_safe(enum odhcp6c_state state, struct odhcp6c_entry *new, uint32_t safe);
+bool odhcp6c_update_entry(enum odhcp6c_state state, struct odhcp6c_entry *new,
+ uint32_t safe, unsigned int holdoff_interval);
void odhcp6c_expire(void);
uint32_t odhcp6c_elapsed(void);
+struct odhcp6c_opt *odhcp6c_find_opt(const uint16_t code);