1 files changed, 201 insertions, 0 deletions
diff --git a/src/odhcp6c.h b/src/odhcp6c.h
new file mode 100644
index 0000000..8ab938e
--- /dev/null
+++ b/src/odhcp6c.h
@@ -0,0 +1,201 @@
+/**
+ * Copyright (C) 2012 Steven Barth <steven@midlink.org>
+ *
+ * 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
+ * the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ */
+#pragma once
+#include <stdint.h>
+#include <stdbool.h>
+#include <netinet/in.h>
+
+#define _unused __attribute__((unused))
+#define _packed __attribute__((packed))
+
+#define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
+
+#ifndef SOL_NETLINK
+#define SOL_NETLINK 270
+#endif
+
+#define ND_OPT_RECURSIVE_DNS 25
+#define ND_OPT_DNSSL 31
+
+enum dhcvp6_opt {
+	DHCPV6_OPT_CLIENTID = 1,
+	DHCPV6_OPT_SERVERID = 2,
+	DHCPV6_OPT_IA_NA = 3,
+	DHCPV6_OPT_IA_ADDR = 5,
+	DHCPV6_OPT_ORO = 6,
+	DHCPV6_OPT_PREF = 7,
+	DHCPV6_OPT_ELAPSED = 8,
+	DHCPV6_OPT_RELAY_MSG = 9,
+	DHCPV6_OPT_AUTH = 11,
+	DHCPV6_OPT_STATUS = 13,
+	DHCPV6_OPT_RAPID_COMMIT = 14,
+	DHCPV6_OPT_RECONF_MESSAGE = 19,
+	DHCPV6_OPT_RECONF_ACCEPT = 20,
+	DHCPV6_OPT_DNS_SERVERS = 23,
+	DHCPV6_OPT_DNS_DOMAIN = 24,
+	DHCPV6_OPT_IA_PD = 25,
+	DHCPV6_OPT_IA_PREFIX = 26,
+	DHCPV6_OPT_INFO_REFRESH = 32,
+	DHCPV6_OPT_FQDN = 39,
+};
+
+enum dhcpv6_msg {
+	DHCPV6_MSG_UNKNOWN = 0,
+	DHCPV6_MSG_SOLICIT = 1,
+	DHCPV6_MSG_ADVERT = 2,
+	DHCPV6_MSG_REQUEST = 3,
+	DHCPV6_MSG_RENEW = 5,
+	DHCPV6_MSG_REBIND = 6,
+	DHCPV6_MSG_REPLY = 7,
+	DHCPV6_MSG_RELEASE = 8,
+	DHCPV6_MSG_DECLINE = 9,
+	DHCPV6_MSG_RECONF = 10,
+	DHCPV6_MSG_INFO_REQ = 11,
+	_DHCPV6_MSG_MAX
+};
+
+enum dhcpv6_status {
+	DHCPV6_NoAddrsAvail = 2,
+	DHCPV6_NoPrefixAvail = 6,
+};
+
+typedef int(reply_handler)(enum dhcpv6_msg orig,
+		const void *opt, const void *end, uint32_t elapsed);
+
+// retransmission strategy
+struct dhcpv6_retx {
+	bool delay;
+	uint8_t init_timeo;
+	uint16_t max_timeo;
+	char name[8];
+	reply_handler *handler_reply;
+	int(*handler_finish)(uint32_t elapsed);
+};
+
+
+// DHCPv6 Protocol Headers
+struct dhcpv6_header {
+	uint8_t msg_type;
+	uint8_t tr_id[3];
+} __attribute__((packed));
+
+struct dhcpv6_ia_hdr {
+	uint16_t type;
+	uint16_t len;
+	uint32_t iaid;
+	uint32_t t1;
+	uint32_t t2;
+} _packed;
+
+struct dhcpv6_ia_addr {
+	uint16_t type;
+	uint16_t len;
+	struct in6_addr addr;
+	uint32_t preferred;
+	uint32_t valid;
+} _packed;
+
+struct dhcpv6_ia_prefix {
+	uint16_t type;
+	uint16_t len;
+	uint32_t preferred;
+	uint32_t valid;
+	uint8_t prefix;
+	struct in6_addr addr;
+} _packed;
+
+struct dhcpv6_duid {
+	uint16_t type;
+	uint16_t len;
+	uint16_t duid_type;
+	uint8_t data[128];
+} _packed;
+
+
+#define dhcpv6_for_each_option(start, end, otype, olen, odata)\
+	for (uint8_t *_o = (uint8_t*)(start); _o + 4 <= (uint8_t*)(end) &&\
+		((otype) = _o[0] << 8 | _o[1]) && ((odata) = (void*)&_o[4]) &&\
+		((olen) = _o[2] << 8 | _o[3]) + (odata) <= (uint8_t*)(end); \
+		_o += 4 + (_o[2] << 8 | _o[3]))
+
+
+struct dhcpv6_server_cand {
+	bool has_noaddravail;
+	bool wants_reconfigure;
+	int16_t preference;
+	uint8_t duid_len;
+	uint8_t duid[130];
+};
+
+
+enum odhcp6c_state {
+	STATE_CLIENT_ID,
+	STATE_SERVER_ID,
+	STATE_SERVER_CAND,
+	STATE_ORO,
+	STATE_DNS,
+	STATE_SEARCH,
+	STATE_IA_NA,
+	STATE_IA_PD,
+	STATE_IA_PD_LOST,
+	STATE_CUSTOM_OPTS,
+	_STATE_MAX
+};
+
+
+struct icmp6_opt {
+	uint8_t type;
+	uint8_t len;
+	uint8_t data[6];
+};
+
+
+enum dhcpv6_mode {
+	DHCPV6_UNKNOWN,
+	DHCPV6_STATELESS,
+	DHCPV6_STATEFUL
+};
+
+
+enum odhcp6c_ia_mode {
+	IA_MODE_NONE,
+	IA_MODE_TRY,
+	IA_MODE_FORCE,
+};
+
+
+int init_dhcpv6(const char *ifname, int request_pd);
+void dhcpv6_set_ia_na_mode(enum odhcp6c_ia_mode mode);
+int dhcpv6_request(enum dhcpv6_msg type);
+int dhcpv6_poll_reconfigure(void);
+void dhcpv6_remove_addrs(void);
+
+int init_rtnetlink(void);
+int set_rtnetlink_addr(int ifindex, const struct in6_addr *addr,
+		time_t pref, time_t valid);
+
+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);
+
+
+// State manipulation
+bool odhcp6c_signal_is_pending(void);
+uint64_t adhc6c_get_milli_time(void);
+void odhcp6c_clear_state(enum odhcp6c_state state);
+void odhcp6c_add_state(enum odhcp6c_state state, const void *data, size_t len);
+size_t odhcp6c_remove_state(enum odhcp6c_state state, size_t offset, size_t len);
+bool odhcp6c_commit_state(enum odhcp6c_state state, size_t old_len);
+void* odhcp6c_get_state(enum odhcp6c_state state, size_t *len);
+