embedaddon/dnsmasq/src/rfc3315.c - diff

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Diff for /embedaddon/dnsmasq/src/rfc3315.c between versions 1.1.1.1 and 1.1.1.4

version 1.1.1.1, 2013/07/29 19:37:40	version 1.1.1.4, 2021/03/17 00:56:46
Line 1	Line 1
/* dnsmasq is Copyright (c) 2000-2013 Simon Kelley	/* dnsmasq is Copyright (c) 2000-2021 Simon Kelley

This program is free software; you can redistribute it and/or modify	This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by	it under the terms of the GNU General Public License as published by
Line 21	Line 21

struct state {	struct state {
unsigned char *clid;	unsigned char *clid;
int clid_len, iaid, ia_type, interface, hostname_auth;	int clid_len, ia_type, interface, hostname_auth, lease_allocate;
char client_hostname, hostname, domain, send_domain;	char client_hostname, hostname, domain, send_domain;
struct dhcp_context *context;	struct dhcp_context *context;
struct in6_addr *link_address;	struct in6_addr link_address, fallback, ll_addr, ula_addr;
unsigned int xid, fqdn_flags;	unsigned int xid, fqdn_flags, iaid;
char *iface_name;	char *iface_name;
void packet_options, end;	void packet_options, end;
struct dhcp_netid tags, context_tags;	struct dhcp_netid tags, context_tags;
#ifdef OPTION6_PREFIX_CLASS	unsigned char mac[DHCP_CHADDR_MAX];
struct prefix_class *send_prefix_class;	unsigned int mac_len, mac_type;
#endif
};	};

static int dhcp6_maybe_relay(struct in6_addr link_address, struct dhcp_netid relay_tagsp, struct dhcp_context context,	static int dhcp6_maybe_relay(struct state state, void inbuff, size_t sz,
int interface, char iface_name, struct in6_addr fallback, void *inbuff, size_t sz, int is_unicast, time_t now);	struct in6_addr *client_addr, int is_unicast, time_t now);
static int dhcp6_no_relay(int msg_type, struct in6_addr link_address, struct dhcp_netid tags, struct dhcp_context *context,	static int dhcp6_no_relay(struct state state, int msg_type, void inbuff, size_t sz, int is_unicast, time_t now);
int interface, char iface_name, struct in6_addr fallback, void *inbuff, size_t sz, int is_unicast, time_t now);
static void log6_opts(int nest, unsigned int xid, void start_opts, void end_opts);	static void log6_opts(int nest, unsigned int xid, void start_opts, void end_opts);
static void log6_packet(struct state state, char type, struct in6_addr addr, char string);	static void log6_packet(struct state state, char type, struct in6_addr addr, char string);
	static void log6_quiet(struct state state, char type, struct in6_addr addr, char string);
static void opt6_find (void opts, void *end, unsigned int search, unsigned int minsize);	static void opt6_find (void opts, void *end, unsigned int search, unsigned int minsize);
static void opt6_next(void opts, void *end);	static void opt6_next(void opts, void *end);
static unsigned int opt6_uint(unsigned char *opt, int offset, int size);	static unsigned int opt6_uint(unsigned char *opt, int offset, int size);
Line 48 static void get_context_tag(struct state *state, struc	Line 46 static void get_context_tag(struct state *state, struc
static int check_ia(struct state state, void opt, void endp, void ia_option);	static int check_ia(struct state state, void opt, void endp, void ia_option);
static int build_ia(struct state state, int t1cntr);	static int build_ia(struct state state, int t1cntr);
static void end_ia(int t1cntr, unsigned int min_time, int do_fuzz);	static void end_ia(int t1cntr, unsigned int min_time, int do_fuzz);
#ifdef OPTION6_PREFIX_CLASS	static void mark_context_used(struct state state, struct in6_addr addr);
static struct prefix_class prefix_class_from_context(struct dhcp_context context);
#endif
static void mark_context_used(struct state state, struct dhcp_context context, struct in6_addr *addr);
static void mark_config_used(struct dhcp_context context, struct in6_addr addr);	static void mark_config_used(struct dhcp_context context, struct in6_addr addr);
static int check_address(struct state state, struct in6_addr addr);	static int check_address(struct state state, struct in6_addr addr);
static void add_address(struct state state, struct dhcp_context context, unsigned int lease_time, unsigned int requested_time,	static int config_valid(struct dhcp_config config, struct dhcp_context context, struct in6_addr addr, struct state state, time_t now);
unsigned int min_time, struct in6_addr addr, int update_lease, time_t now);	static struct addrlist config_implies(struct dhcp_config config, struct dhcp_context context, struct in6_addr addr);
	static void add_address(struct state state, struct dhcp_context context, unsigned int lease_time, void *ia_option,
	unsigned int min_time, struct in6_addr addr, time_t now);
static void update_leases(struct state state, struct dhcp_context context, struct in6_addr *addr, unsigned int lease_time, time_t now);	static void update_leases(struct state state, struct dhcp_context context, struct in6_addr *addr, unsigned int lease_time, time_t now);
static int add_local_addrs(struct dhcp_context *context);	static int add_local_addrs(struct dhcp_context *context);
struct dhcp_netid add_options(struct state state, struct in6_addr fallback, struct dhcp_context context);	static struct dhcp_netid add_options(struct state state, int do_refresh);
static void calculate_times(struct dhcp_context context, unsigned int min_time, unsigned int *valid_timep,	static void calculate_times(struct dhcp_context context, unsigned int min_time, unsigned int *valid_timep,
unsigned int *preferred_timep, unsigned int lease_time, unsigned int requested_time);	unsigned int *preferred_timep, unsigned int lease_time);

#define opt6_len(opt) ((int)(opt6_uint(opt, -2, 2)))	#define opt6_len(opt) ((int)(opt6_uint(opt, -2, 2)))
#define opt6_type(opt) (opt6_uint(opt, -4, 2))	#define opt6_type(opt) (opt6_uint(opt, -4, 2))
#define opt6_ptr(opt, i) ((void )&(((unsigned char )(opt))[4+(i)]))	#define opt6_ptr(opt, i) ((void )&(((unsigned char )(opt))[4+(i)]))

	#define opt6_user_vendor_ptr(opt, i) ((void )&(((unsigned char )(opt))[2+(i)]))
	#define opt6_user_vendor_len(opt) ((int)(opt6_uint(opt, -4, 2)))
	#define opt6_user_vendor_next(opt, end) (opt6_next(((void *) opt) - 2, end))


unsigned short dhcp6_reply(struct dhcp_context context, int interface, char iface_name,	unsigned short dhcp6_reply(struct dhcp_context context, int interface, char iface_name,
struct in6_addr *fallback, size_t sz, int is_unicast, time_t now)	struct in6_addr fallback, struct in6_addr ll_addr, struct in6_addr *ula_addr,
	size_t sz, struct in6_addr *client_addr, time_t now)
{	{
struct dhcp_netid *relay_tags = NULL;
struct dhcp_vendor *vendor;	struct dhcp_vendor *vendor;
int msg_type;	int msg_type;
	struct state state;

if (sz <= 4)	if (sz <= 4)
return 0;	return 0;
Line 83 unsigned short dhcp6_reply(struct dhcp_context *contex	Line 85 unsigned short dhcp6_reply(struct dhcp_context *contex
for (vendor = daemon->dhcp_vendors; vendor; vendor = vendor->next)	for (vendor = daemon->dhcp_vendors; vendor; vendor = vendor->next)
vendor->netid.next = &vendor->netid;	vendor->netid.next = &vendor->netid;

save_counter(0);	reset_counter();
	state.context = context;
if (dhcp6_maybe_relay(NULL, &relay_tags, context, interface, iface_name, fallback, daemon->dhcp_packet.iov_base, sz, is_unicast, now))	state.interface = interface;
	state.iface_name = iface_name;
	state.fallback = fallback;
	state.ll_addr = ll_addr;
	state.ula_addr = ula_addr;
	state.mac_len = 0;
	state.tags = NULL;
	state.link_address = NULL;

	if (dhcp6_maybe_relay(&state, daemon->dhcp_packet.iov_base, sz, client_addr,
	IN6_IS_ADDR_MULTICAST(client_addr), now))
return msg_type == DHCP6RELAYFORW ? DHCPV6_SERVER_PORT : DHCPV6_CLIENT_PORT;	return msg_type == DHCP6RELAYFORW ? DHCPV6_SERVER_PORT : DHCPV6_CLIENT_PORT;

return 0;	return 0;
}	}

/* This cost me blood to write, it will probably cost you blood to understand - srk. */	/* This cost me blood to write, it will probably cost you blood to understand - srk. */
static int dhcp6_maybe_relay(struct in6_addr link_address, struct dhcp_netid relay_tagsp, struct dhcp_context context,	static int dhcp6_maybe_relay(struct state state, void inbuff, size_t sz,
int interface, char iface_name, struct in6_addr fallback, void *inbuff, size_t sz, int is_unicast, time_t now)	struct in6_addr *client_addr, int is_unicast, time_t now)
{	{
void *end = inbuff + sz;	void *end = inbuff + sz;
void *opts = inbuff + 34;	void *opts = inbuff + 34;
Line 102 static int dhcp6_maybe_relay(struct in6_addr *link_add	Line 114 static int dhcp6_maybe_relay(struct in6_addr *link_add
void *opt;	void *opt;
struct dhcp_vendor *vendor;	struct dhcp_vendor *vendor;

/* if not an encaplsulated relayed message, just do the stuff */	/* if not an encapsulated relayed message, just do the stuff */
if (msg_type != DHCP6RELAYFORW)	if (msg_type != DHCP6RELAYFORW)
{	{
/* if link_address != NULL if points to the link address field of the	/* if link_address != NULL if points to the link address field of the
innermost nested RELAYFORW message, which is where we find the	innermost nested RELAYFORW message, which is where we find the
address of the network on which we can allocate an address.	address of the network on which we can allocate an address.
Recalculate the available contexts using that information. */	Recalculate the available contexts using that information.

	link_address == NULL means there's no relay in use, so we try and find the client's
	MAC address from the local ND cache. */

if (link_address)	if (!state->link_address)
	get_client_mac(client_addr, state->interface, state->mac, &state->mac_len, &state->mac_type, now);
	else
{	{
struct dhcp_context *c;	struct dhcp_context *c;
context = NULL;	struct shared_network *share = NULL;
	state->context = NULL;
if (!IN6_IS_ADDR_LOOPBACK(link_address) &&
!IN6_IS_ADDR_LINKLOCAL(link_address) &&	if (!IN6_IS_ADDR_LOOPBACK(state->link_address) &&
!IN6_IS_ADDR_MULTICAST(link_address))	!IN6_IS_ADDR_LINKLOCAL(state->link_address) &&
	!IN6_IS_ADDR_MULTICAST(state->link_address))
for (c = daemon->dhcp6; c; c = c->next)	for (c = daemon->dhcp6; c; c = c->next)
if ((c->flags & CONTEXT_DHCP) &&	{
!(c->flags & CONTEXT_TEMPLATE) &&	for (share = daemon->shared_networks; share; share = share->next)
is_same_net6(link_address, &c->start6, c->prefix) &&	{
is_same_net6(link_address, &c->end6, c->prefix))	if (share->shared_addr.s_addr != 0)
{	continue;
c->preferred = c->valid = 0xffffffff;
c->current = context;	if (share->if_index != 0 \|\|
context = c;	!IN6_ARE_ADDR_EQUAL(state->link_address, &share->match_addr6))
}	continue;

	if ((c->flags & CONTEXT_DHCP) &&
	!(c->flags & (CONTEXT_TEMPLATE \| CONTEXT_OLD)) &&
	is_same_net6(&share->shared_addr6, &c->start6, c->prefix) &&
	is_same_net6(&share->shared_addr6, &c->end6, c->prefix))
	break;
	}

	if (share \|\|
	((c->flags & CONTEXT_DHCP) &&
	!(c->flags & (CONTEXT_TEMPLATE \| CONTEXT_OLD)) &&
	is_same_net6(state->link_address, &c->start6, c->prefix) &&
	is_same_net6(state->link_address, &c->end6, c->prefix)))
	{
	c->preferred = c->valid = 0xffffffff;
	c->current = state->context;
	state->context = c;
	}
	}

if (!context)	if (!state->context)
{	{
inet_ntop(AF_INET6, link_address, daemon->addrbuff, ADDRSTRLEN);	inet_ntop(AF_INET6, state->link_address, daemon->addrbuff, ADDRSTRLEN);
my_syslog(MS_DHCP \| LOG_WARNING,	my_syslog(MS_DHCP \| LOG_WARNING,
_("no address range available for DHCPv6 request from relay at %s"),	_("no address range available for DHCPv6 request from relay at %s"),
daemon->addrbuff);	daemon->addrbuff);
return 0;	return 0;
}	}
}	}

if (!context)	if (!state->context)
{	{
my_syslog(MS_DHCP \| LOG_WARNING,	my_syslog(MS_DHCP \| LOG_WARNING,
_("no address range available for DHCPv6 request via %s"), iface_name);	_("no address range available for DHCPv6 request via %s"), state->iface_name);
return 0;	return 0;
}	}

return dhcp6_no_relay(msg_type, link_address, *relay_tagsp, context, interface, iface_name, fallback, inbuff, sz, is_unicast, now);	return dhcp6_no_relay(state, msg_type, inbuff, sz, is_unicast, now);
}	}

/* must have at least msg_type+hopcount+link_address+peer_address+minimal size option	/* must have at least msg_type+hopcount+link_address+peer_address+minimal size option
Line 155 static int dhcp6_maybe_relay(struct in6_addr *link_add	Line 192 static int dhcp6_maybe_relay(struct in6_addr *link_add
return 0;	return 0;

/* copy header stuff into reply message and set type to reply */	/* copy header stuff into reply message and set type to reply */
outmsgtypep = put_opt6(inbuff, 34);	if (!(outmsgtypep = put_opt6(inbuff, 34)))
	return 0;
*outmsgtypep = DHCP6RELAYREPL;	*outmsgtypep = DHCP6RELAYREPL;

/* look for relay options and set tags if found. */	/* look for relay options and set tags if found. */
Line 175 static int dhcp6_maybe_relay(struct in6_addr *link_add	Line 213 static int dhcp6_maybe_relay(struct in6_addr *link_add
memcmp(vendor->data, opt6_ptr(opt, 0), vendor->len) == 0 &&	memcmp(vendor->data, opt6_ptr(opt, 0), vendor->len) == 0 &&
vendor->netid.next != &vendor->netid)	vendor->netid.next != &vendor->netid)
{	{
vendor->netid.next = *relay_tagsp;	vendor->netid.next = state->tags;
*relay_tagsp = &vendor->netid;	state->tags = &vendor->netid;
break;	break;
}	}
}	}

	/* RFC-6939 */
	if ((opt = opt6_find(opts, end, OPTION6_CLIENT_MAC, 3)))
	{
	if (opt6_len(opt) - 2 > DHCP_CHADDR_MAX) {
	return 0;
	}
	state->mac_type = opt6_uint(opt, 0, 2);
	state->mac_len = opt6_len(opt) - 2;
	memcpy(&state->mac[0], opt6_ptr(opt, 2), state->mac_len);
	}

for (opt = opts; opt; opt = opt6_next(opt, end))	for (opt = opts; opt; opt = opt6_next(opt, end))
{	{
int o = new_opt6(opt6_type(opt));	if (opt6_ptr(opt, 0) + opt6_len(opt) > end)
if (opt6_type(opt) == OPTION6_RELAY_MSG)	return 0;

	/* Don't copy MAC address into reply. */
	if (opt6_type(opt) != OPTION6_CLIENT_MAC)
{	{
struct in6_addr link_address;	int o = new_opt6(opt6_type(opt));
/* the packet data is unaligned, copy to aligned storage */	if (opt6_type(opt) == OPTION6_RELAY_MSG)
memcpy(&link_address, inbuff + 2, IN6ADDRSZ);	{
/* Not, zero is_unicast since that is now known to refer to the	struct in6_addr align;
relayed packet, not the original sent by the client */	/* the packet data is unaligned, copy to aligned storage */
if (!dhcp6_maybe_relay(&link_address, relay_tagsp, context, interface, iface_name, fallback, opt6_ptr(opt, 0), opt6_len(opt), 0, now))	memcpy(&align, inbuff + 2, IN6ADDRSZ);
return 0;	state->link_address = &align;
	/* zero is_unicast since that is now known to refer to the
	relayed packet, not the original sent by the client */
	if (!dhcp6_maybe_relay(state, opt6_ptr(opt, 0), opt6_len(opt), client_addr, 0, now))
	return 0;
	}
	else
	put_opt6(opt6_ptr(opt, 0), opt6_len(opt));
	end_opt6(o);
}	}
else
put_opt6(opt6_ptr(opt, 0), opt6_len(opt));
end_opt6(o);
}	}

return 1;	return 1;
}	}

static int dhcp6_no_relay(int msg_type, struct in6_addr link_address, struct dhcp_netid tags, struct dhcp_context *context,	static int dhcp6_no_relay(struct state state, int msg_type, void inbuff, size_t sz, int is_unicast, time_t now)
int interface, char iface_name, struct in6_addr fallback, void *inbuff, size_t sz, int is_unicast, time_t now)
{	{
void *opt;	void *opt;
int i, o, o1, start_opts;	int i, o, o1, start_opts;
Line 214 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 270 static int dhcp6_no_relay(int msg_type, struct in6_add
unsigned char *outmsgtypep;	unsigned char *outmsgtypep;
struct dhcp_vendor *vendor;	struct dhcp_vendor *vendor;
struct dhcp_context *context_tmp;	struct dhcp_context *context_tmp;
	struct dhcp_mac *mac_opt;
unsigned int ignore = 0;	unsigned int ignore = 0;
struct state state;
#ifdef OPTION6_PREFIX_CLASS
struct prefix_class *p;
int dump_all_prefix_classes = 0;
#endif

state.packet_options = inbuff + 4;	state->packet_options = inbuff + 4;
state.end = inbuff + sz;	state->end = inbuff + sz;
state.clid = NULL;	state->clid = NULL;
state.clid_len = 0;	state->clid_len = 0;
state.context_tags = NULL;	state->lease_allocate = 0;
state.tags = tags;	state->context_tags = NULL;
state.link_address = link_address;	state->domain = NULL;
state.interface = interface;	state->send_domain = NULL;
state.domain = NULL;	state->hostname_auth = 0;
state.send_domain = NULL;	state->hostname = NULL;
state.context = context;	state->client_hostname = NULL;
state.hostname_auth = 0;	state->fqdn_flags = 0x01; /* default to send if we receive no FQDN option */
state.hostname = NULL;
state.client_hostname = NULL;
state.iface_name = iface_name;
state.fqdn_flags = 0x01; /* default to send if we recieve no FQDN option */
#ifdef OPTION6_PREFIX_CLASS
state.send_prefix_class = NULL;
#endif

/* set tag with name == interface */	/* set tag with name == interface */
iface_id.net = iface_name;	iface_id.net = state->iface_name;
iface_id.next = state.tags;	iface_id.next = state->tags;
state.tags = &iface_id;	state->tags = &iface_id;

/* set tag "dhcpv6" */	/* set tag "dhcpv6" */
v6_id.net = "dhcpv6";	v6_id.net = "dhcpv6";
v6_id.next = state.tags;	v6_id.next = state->tags;
state.tags = &v6_id;	state->tags = &v6_id;

/* copy over transaction-id, and save pointer to message type */	/* copy over transaction-id, and save pointer to message type */
outmsgtypep = put_opt6(inbuff, 4);	if (!(outmsgtypep = put_opt6(inbuff, 4)))
	return 0;
start_opts = save_counter(-1);	start_opts = save_counter(-1);
state.xid = outmsgtypep[3] \| outmsgtypep[2] << 8 \| outmsgtypep[1] << 16;	state->xid = outmsgtypep[3] \| outmsgtypep[2] << 8 \| outmsgtypep[1] << 16;

/* We're going to be linking tags from all context we use.	/* We're going to be linking tags from all context we use.
mark them as unused so we don't link one twice and break the list */	mark them as unused so we don't link one twice and break the list */
for (context_tmp = context; context_tmp; context_tmp = context_tmp->current)	for (context_tmp = state->context; context_tmp; context_tmp = context_tmp->current)
{	{
context->netid.next = &context->netid;	context_tmp->netid.next = &context_tmp->netid;

if (option_bool(OPT_LOG_OPTS))	if (option_bool(OPT_LOG_OPTS))
{	{
Line 268 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 314 static int dhcp6_no_relay(int msg_type, struct in6_add
inet_ntop(AF_INET6, &context_tmp->end6, daemon->dhcp_buff2, ADDRSTRLEN);	inet_ntop(AF_INET6, &context_tmp->end6, daemon->dhcp_buff2, ADDRSTRLEN);
if (context_tmp->flags & (CONTEXT_STATIC))	if (context_tmp->flags & (CONTEXT_STATIC))
my_syslog(MS_DHCP \| LOG_INFO, _("%u available DHCPv6 subnet: %s/%d"),	my_syslog(MS_DHCP \| LOG_INFO, _("%u available DHCPv6 subnet: %s/%d"),
state.xid, daemon->dhcp_buff, context_tmp->prefix);	state->xid, daemon->dhcp_buff, context_tmp->prefix);
else	else
my_syslog(MS_DHCP \| LOG_INFO, _("%u available DHCP range: %s -- %s"),	my_syslog(MS_DHCP \| LOG_INFO, _("%u available DHCP range: %s -- %s"),
state.xid, daemon->dhcp_buff, daemon->dhcp_buff2);	state->xid, daemon->dhcp_buff, daemon->dhcp_buff2);
}	}
}	}

if ((opt = opt6_find(state.packet_options, state.end, OPTION6_CLIENT_ID, 1)))	if ((opt = opt6_find(state->packet_options, state->end, OPTION6_CLIENT_ID, 1)))
{	{
state.clid = opt6_ptr(opt, 0);	state->clid = opt6_ptr(opt, 0);
state.clid_len = opt6_len(opt);	state->clid_len = opt6_len(opt);
o = new_opt6(OPTION6_CLIENT_ID);	o = new_opt6(OPTION6_CLIENT_ID);
put_opt6(state.clid, state.clid_len);	put_opt6(state->clid, state->clid_len);
end_opt6(o);	end_opt6(o);
}	}
else if (msg_type != DHCP6IREQ)	else if (msg_type != DHCP6IREQ)
return 0;	return 0;

/* server-id must match except for SOLICIT and CONFIRM messages */	/* server-id must match except for SOLICIT, CONFIRM and REBIND messages */
if (msg_type != DHCP6SOLICIT && msg_type != DHCP6CONFIRM && msg_type != DHCP6IREQ &&	if (msg_type != DHCP6SOLICIT && msg_type != DHCP6CONFIRM && msg_type != DHCP6IREQ && msg_type != DHCP6REBIND &&
(!(opt = opt6_find(state.packet_options, state.end, OPTION6_SERVER_ID, 1)) \|\|	(!(opt = opt6_find(state->packet_options, state->end, OPTION6_SERVER_ID, 1)) \|\|
opt6_len(opt) != daemon->duid_len \|\|	opt6_len(opt) != daemon->duid_len \|\|
memcmp(opt6_ptr(opt, 0), daemon->duid, daemon->duid_len) != 0))	memcmp(opt6_ptr(opt, 0), daemon->duid, daemon->duid_len) != 0))
return 0;	return 0;
Line 301 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 347 static int dhcp6_no_relay(int msg_type, struct in6_add
(msg_type == DHCP6REQUEST \|\| msg_type == DHCP6RENEW \|\| msg_type == DHCP6RELEASE \|\| msg_type == DHCP6DECLINE))	(msg_type == DHCP6REQUEST \|\| msg_type == DHCP6RENEW \|\| msg_type == DHCP6RELEASE \|\| msg_type == DHCP6DECLINE))

{	{
	*outmsgtypep = DHCP6REPLY;
o1 = new_opt6(OPTION6_STATUS_CODE);	o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6USEMULTI);	put_opt6_short(DHCP6USEMULTI);
put_opt6_string("Use multicast");	put_opt6_string("Use multicast");
Line 320 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 367 static int dhcp6_no_relay(int msg_type, struct in6_add
else	else
continue;	continue;

if ((opt = opt6_find(state.packet_options, state.end, mopt, 2)))	if ((opt = opt6_find(state->packet_options, state->end, mopt, 2)))
{	{
void enc_opt, enc_end = opt6_ptr(opt, opt6_len(opt));	void enc_opt, enc_end = opt6_ptr(opt, opt6_len(opt));
int offset = 0;	int offset = 0;
Line 336 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 383 static int dhcp6_no_relay(int msg_type, struct in6_add
offset = 4;	offset = 4;
}	}

for (enc_opt = opt6_ptr(opt, offset); enc_opt; enc_opt = opt6_next(enc_opt, enc_end))	/* Note that format if user/vendor classes is different to DHCP options - no option types. */
for (i = 0; i <= (opt6_len(enc_opt) - vendor->len); i++)	for (enc_opt = opt6_ptr(opt, offset); enc_opt; enc_opt = opt6_user_vendor_next(enc_opt, enc_end))
if (memcmp(vendor->data, opt6_ptr(enc_opt, i), vendor->len) == 0)	for (i = 0; i <= (opt6_user_vendor_len(enc_opt) - vendor->len); i++)
	if (memcmp(vendor->data, opt6_user_vendor_ptr(enc_opt, i), vendor->len) == 0)
{	{
vendor->netid.next = state.tags;	vendor->netid.next = state->tags;
state.tags = &vendor->netid;	state->tags = &vendor->netid;
break;	break;
}	}
}	}
}	}

if (option_bool(OPT_LOG_OPTS) && (opt = opt6_find(state.packet_options, state.end, OPTION6_VENDOR_CLASS, 4)))	if (option_bool(OPT_LOG_OPTS) && (opt = opt6_find(state->packet_options, state->end, OPTION6_VENDOR_CLASS, 4)))
my_syslog(MS_DHCP \| LOG_INFO, _("%u vendor class: %u"), state.xid, opt6_uint(opt, 0, 4));	my_syslog(MS_DHCP \| LOG_INFO, _("%u vendor class: %u"), state->xid, opt6_uint(opt, 0, 4));

/* dhcp-match. If we have hex-and-wildcards, look for a left-anchored match.	/* dhcp-match. If we have hex-and-wildcards, look for a left-anchored match.
Otherwise assume the option is an array, and look for a matching element.	Otherwise assume the option is an array, and look for a matching element.
If no data given, existance of the option is enough. This code handles	If no data given, existence of the option is enough. This code handles
V-I opts too. */	V-I opts too. */
for (opt_cfg = daemon->dhcp_match6; opt_cfg; opt_cfg = opt_cfg->next)	for (opt_cfg = daemon->dhcp_match6; opt_cfg; opt_cfg = opt_cfg->next)
{	{
Line 360 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 408 static int dhcp6_no_relay(int msg_type, struct in6_add

if (opt_cfg->flags & DHOPT_RFC3925)	if (opt_cfg->flags & DHOPT_RFC3925)
{	{
for (opt = opt6_find(state.packet_options, state.end, OPTION6_VENDOR_OPTS, 4);	for (opt = opt6_find(state->packet_options, state->end, OPTION6_VENDOR_OPTS, 4);
opt;	opt;
opt = opt6_find(opt6_next(opt, state.end), state.end, OPTION6_VENDOR_OPTS, 4))	opt = opt6_find(opt6_next(opt, state->end), state->end, OPTION6_VENDOR_OPTS, 4))
{	{
void *vopt;	void *vopt;
void *vend = opt6_ptr(opt, opt6_len(opt));	void *vend = opt6_ptr(opt, opt6_len(opt));
Line 378 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 426 static int dhcp6_no_relay(int msg_type, struct in6_add
}	}
else	else
{	{
if (!(opt = opt6_find(state.packet_options, state.end, opt_cfg->opt, 1)))	if (!(opt = opt6_find(state->packet_options, state->end, opt_cfg->opt, 1)))
continue;	continue;

match = match_bytes(opt_cfg, opt6_ptr(opt, 0), opt6_len(opt));	match = match_bytes(opt_cfg, opt6_ptr(opt, 0), opt6_len(opt));
Line 386 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 434 static int dhcp6_no_relay(int msg_type, struct in6_add

if (match)	if (match)
{	{
opt_cfg->netid->next = state.tags;	opt_cfg->netid->next = state->tags;
state.tags = opt_cfg->netid;	state->tags = opt_cfg->netid;
}	}
}	}

	if (state->mac_len != 0)
	{
	if (option_bool(OPT_LOG_OPTS))
	{
	print_mac(daemon->dhcp_buff, state->mac, state->mac_len);
	my_syslog(MS_DHCP \| LOG_INFO, _("%u client MAC address: %s"), state->xid, daemon->dhcp_buff);
	}

	for (mac_opt = daemon->dhcp_macs; mac_opt; mac_opt = mac_opt->next)
	if ((unsigned)mac_opt->hwaddr_len == state->mac_len &&
	((unsigned)mac_opt->hwaddr_type == state->mac_type \|\| mac_opt->hwaddr_type == 0) &&
	memcmp_masked(mac_opt->hwaddr, state->mac, state->mac_len, mac_opt->mask))
	{
	mac_opt->netid.next = state->tags;
	state->tags = &mac_opt->netid;
	}
	}

if ((opt = opt6_find(state.packet_options, state.end, OPTION6_FQDN, 1)))	if ((opt = opt6_find(state->packet_options, state->end, OPTION6_FQDN, 1)))
{	{
/* RFC4704 refers */	/* RFC4704 refers */
int len = opt6_len(opt) - 1;	int len = opt6_len(opt) - 1;

state.fqdn_flags = opt6_uint(opt, 0, 1);	state->fqdn_flags = opt6_uint(opt, 0, 1);

/* Always force update, since the client has no way to do it itself. */	/* Always force update, since the client has no way to do it itself. */
if (!option_bool(OPT_FQDN_UPDATE) && !(state.fqdn_flags & 0x01))	if (!option_bool(OPT_FQDN_UPDATE) && !(state->fqdn_flags & 0x01))
state.fqdn_flags \|= 0x03;	state->fqdn_flags \|= 0x03;

state.fqdn_flags &= ~0x04;	state->fqdn_flags &= ~0x04;

if (len != 0 && len < 255)	if (len != 0 && len < 255)
{	{
Line 424 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 490 static int dhcp6_no_relay(int msg_type, struct in6_add

if (legal_hostname(daemon->dhcp_buff))	if (legal_hostname(daemon->dhcp_buff))
{	{
state.client_hostname = daemon->dhcp_buff;	struct dhcp_match_name *m;
	size_t nl = strlen(daemon->dhcp_buff);

	state->client_hostname = daemon->dhcp_buff;

if (option_bool(OPT_LOG_OPTS))	if (option_bool(OPT_LOG_OPTS))
my_syslog(MS_DHCP \| LOG_INFO, _("%u client provides name: %s"), state.xid, state.client_hostname);	my_syslog(MS_DHCP \| LOG_INFO, _("%u client provides name: %s"), state->xid, state->client_hostname);

	for (m = daemon->dhcp_name_match; m; m = m->next)
	{
	size_t ml = strlen(m->name);
	char save = 0;

	if (nl < ml)
	continue;
	if (nl > ml)
	{
	save = state->client_hostname[ml];
	state->client_hostname[ml] = 0;
	}

	if (hostname_isequal(state->client_hostname, m->name) &&
	(save == 0 \|\| m->wildcard))
	{
	m->netid->next = state->tags;
	state->tags = m->netid;
	}

	if (save != 0)
	state->client_hostname[ml] = save;
	}
}	}
}	}
}	}

if (state.clid)	if (state->clid &&
	(config = find_config(daemon->dhcp_conf, state->context, state->clid, state->clid_len,
	state->mac, state->mac_len, state->mac_type, NULL, run_tag_if(state->tags))) &&
	have_config(config, CONFIG_NAME))
{	{
config = find_config6(daemon->dhcp_conf, context, state.clid, state.clid_len, NULL);	state->hostname = config->hostname;
	state->domain = config->domain;
	state->hostname_auth = 1;
	}
	else if (state->client_hostname)
	{
	state->domain = strip_hostname(state->client_hostname);

if (have_config(config, CONFIG_NAME))	if (strlen(state->client_hostname) != 0)
{	{
state.hostname = config->hostname;	state->hostname = state->client_hostname;
state.domain = config->domain;
state.hostname_auth = 1;
}
else if (state.client_hostname)
{
state.domain = strip_hostname(state.client_hostname);

if (strlen(state.client_hostname) != 0)	if (!config)
{	{
state.hostname = state.client_hostname;	/* Search again now we have a hostname.
if (!config)	Only accept configs without CLID here, (it won't match)
{	to avoid impersonation by name. */
/* Search again now we have a hostname.	struct dhcp_config *new = find_config(daemon->dhcp_conf, state->context, NULL, 0, NULL, 0, 0, state->hostname, run_tag_if(state->tags));
Only accept configs without CLID here, (it won't match)	if (new && !have_config(new, CONFIG_CLID) && !new->hwaddr)
to avoid impersonation by name. */	config = new;
struct dhcp_config *new = find_config6(daemon->dhcp_conf, context, NULL, 0, state.hostname);
if (new && !have_config(new, CONFIG_CLID) && !new->hwaddr)
config = new;
}
}	}
}	}
}	}
Line 467 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 560 static int dhcp6_no_relay(int msg_type, struct in6_add

for (list = config->netid; list; list = list->next)	for (list = config->netid; list; list = list->next)
{	{
list->list->next = state.tags;	list->list->next = state->tags;
state.tags = list->list;	state->tags = list->list;
}	}

/* set "known" tag for known hosts */	/* set "known" tag for known hosts */
known_id.net = "known";	known_id.net = "known";
known_id.next = state.tags;	known_id.next = state->tags;
state.tags = &known_id;	state->tags = &known_id;

if (have_config(config, CONFIG_DISABLE))	if (have_config(config, CONFIG_DISABLE))
ignore = 1;	ignore = 1;
}	}
	else if (state->clid &&
#ifdef OPTION6_PREFIX_CLASS	find_config(daemon->dhcp_conf, NULL, state->clid, state->clid_len,
/* OPTION_PREFIX_CLASS in ORO, send addresses in all prefix classes */	state->mac, state->mac_len, state->mac_type, NULL, run_tag_if(state->tags)))
if (daemon->prefix_classes && (msg_type == DHCP6SOLICIT \|\| msg_type == DHCP6REQUEST))
{	{
void *oro;	known_id.net = "known-othernet";
	known_id.next = state->tags;
if ((oro = opt6_find(state.packet_options, state.end, OPTION6_ORO, 0)))	state->tags = &known_id;
for (i = 0; i < opt6_len(oro) - 1; i += 2)	}
if (opt6_uint(oro, i, 2) == OPTION6_PREFIX_CLASS)
{
dump_all_prefix_classes = 1;
break;
}

if (msg_type != DHCP6SOLICIT \|\| dump_all_prefix_classes)
/* Add the tags associated with prefix classes so we can use the DHCP ranges.
Not done for SOLICIT as we add them one-at-time. */
for (p = daemon->prefix_classes; p ; p = p->next)
{
p->tag.next = state.tags;
state.tags = &p->tag;
}
}
#endif

tagif = run_tag_if(state.tags);

	tagif = run_tag_if(state->tags);

/* if all the netids in the ignore list are present, ignore this client */	/* if all the netids in the ignore list are present, ignore this client */
if (daemon->dhcp_ignore)	if (daemon->dhcp_ignore)
{	{
Line 518 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 594 static int dhcp6_no_relay(int msg_type, struct in6_add
}	}

/* if all the netids in the ignore_name list are present, ignore client-supplied name */	/* if all the netids in the ignore_name list are present, ignore client-supplied name */
if (!state.hostname_auth)	if (!state->hostname_auth)
{	{
struct dhcp_netid_list *id_list;	struct dhcp_netid_list *id_list;

Line 526 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 602 static int dhcp6_no_relay(int msg_type, struct in6_add
if ((!id_list->list) \|\| match_netid(id_list->list, tagif, 0))	if ((!id_list->list) \|\| match_netid(id_list->list, tagif, 0))
break;	break;
if (id_list)	if (id_list)
state.hostname = NULL;	state->hostname = NULL;
}	}


Line 534 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 610 static int dhcp6_no_relay(int msg_type, struct in6_add
{	{
default:	default:
return 0;	return 0;


case DHCP6SOLICIT:	case DHCP6SOLICIT:
{	{
void *rapid_commit = opt6_find(state.packet_options, state.end, OPTION6_RAPID_COMMIT, 0);
int address_assigned = 0;	int address_assigned = 0;
/* tags without all prefix-class tags */	/* tags without all prefix-class tags */
struct dhcp_netid *solicit_tags = tagif;	struct dhcp_netid *solicit_tags;
struct dhcp_context *c;	struct dhcp_context *c;

if (rapid_commit)	*outmsgtypep = DHCP6ADVERTISE;

	if (opt6_find(state->packet_options, state->end, OPTION6_RAPID_COMMIT, 0))
{	{
	*outmsgtypep = DHCP6REPLY;
	state->lease_allocate = 1;
o = new_opt6(OPTION6_RAPID_COMMIT);	o = new_opt6(OPTION6_RAPID_COMMIT);
end_opt6(o);	end_opt6(o);
}	}

	log6_quiet(state, "DHCPSOLICIT", NULL, ignore ? _("ignored") : NULL);

/* set reply message type */	request_no_address:
*outmsgtypep = rapid_commit ? DHCP6REPLY : DHCP6ADVERTISE;	solicit_tags = tagif;

log6_packet(&state, "DHCPSOLICIT", NULL, ignore ? _("ignored") : NULL);

if (ignore)	if (ignore)
return 0;	return 0;
Line 562 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 641 static int dhcp6_no_relay(int msg_type, struct in6_add
lease6_reset();	lease6_reset();

/* Can use configured address max once per prefix */	/* Can use configured address max once per prefix */
for (c = context; c; c = c->current)	for (c = state->context; c; c = c->current)
c->flags &= ~CONTEXT_CONF_USED;	c->flags &= ~CONTEXT_CONF_USED;

for (opt = state.packet_options; opt; opt = opt6_next(opt, state.end))	for (opt = state->packet_options; opt; opt = opt6_next(opt, state->end))
{	{
void ia_option, ia_end;	void ia_option, ia_end;
unsigned int min_time = 0xffffffff;	unsigned int min_time = 0xffffffff;
Line 574 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 653 static int dhcp6_no_relay(int msg_type, struct in6_add
/* set unless we're sending a particular prefix-class, when we	/* set unless we're sending a particular prefix-class, when we
want only dhcp-ranges with the correct tags set and not those without any tags. */	want only dhcp-ranges with the correct tags set and not those without any tags. */
int plain_range = 1;	int plain_range = 1;
u32 lease_time, requested_time;	u32 lease_time;
struct dhcp_lease *ltmp;	struct dhcp_lease *ltmp;
struct in6_addr *req_addr;	struct in6_addr req_addr, addr;
struct in6_addr addr;
	if (!check_ia(state, opt, &ia_end, &ia_option))
if (!check_ia(&state, opt, &ia_end, &ia_option))
continue;	continue;

/* reset USED bits in contexts - one address per prefix per IAID */	/* reset USED bits in contexts - one address per prefix per IAID */
for (c = context; c; c = c->current)	for (c = state->context; c; c = c->current)
c->flags &= ~CONTEXT_USED;	c->flags &= ~CONTEXT_USED;

#ifdef OPTION6_PREFIX_CLASS	o = build_ia(state, &t1cntr);
if (daemon->prefix_classes && state.ia_type == OPTION6_IA_NA)	if (address_assigned)
{	address_assigned = 2;
void *prefix_opt;
int prefix_class;

if (dump_all_prefix_classes)
/* OPTION_PREFIX_CLASS in ORO, send addresses in all prefix classes */
plain_range = 0;
else
{
if ((prefix_opt = opt6_find(opt6_ptr(opt, 12), ia_end, OPTION6_PREFIX_CLASS, 2)))
{

prefix_class = opt6_uint(prefix_opt, 0, 2);

for (p = daemon->prefix_classes; p ; p = p->next)
if (p->class == prefix_class)
break;

if (!p)
my_syslog(MS_DHCP \| LOG_WARNING, _("unknown prefix-class %d"), prefix_class);
else
{
/* add tag to list, and exclude undecorated dhcp-ranges */
p->tag.next = state.tags;
solicit_tags = run_tag_if(&p->tag);
plain_range = 0;
state.send_prefix_class = p;
}
}
else
{
/* client didn't ask for a prefix class, lets see if we can find one. */
for (p = daemon->prefix_classes; p ; p = p->next)
{
p->tag.next = NULL;
if (match_netid(&p->tag, solicit_tags, 1))
break;
}

if (p)
{
plain_range = 0;
state.send_prefix_class = p;
}
}

if (p && option_bool(OPT_LOG_OPTS))
my_syslog(MS_DHCP \| LOG_INFO, "%u prefix class %d tag:%s", state.xid, p->class, p->tag.net);
}
}
#endif

o = build_ia(&state, &t1cntr);

for (ia_counter = 0; ia_option; ia_counter++, ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))	for (ia_counter = 0; ia_option; ia_counter++, ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
{	{
req_addr = opt6_ptr(ia_option, 0);	/* worry about alignment here. */
requested_time = opt6_uint(ia_option, 16, 4);	memcpy(&req_addr, opt6_ptr(ia_option, 0), IN6ADDRSZ);

if ((c = address6_valid(context, req_addr, solicit_tags, plain_range)))	if ((c = address6_valid(state->context, &req_addr, solicit_tags, plain_range)))
{	{
lease_time = c->lease_time;	lease_time = c->lease_time;
/* If the client asks for an address on the same network as a configured address,	/* If the client asks for an address on the same network as a configured address,
offer the configured address instead, to make moving to newly-configured	offer the configured address instead, to make moving to newly-configured
addresses automatic. */	addresses automatic. */
if (!(c->flags & CONTEXT_CONF_USED) && config_valid(config, c, &addr) && check_address(&state, &addr))	if (!(c->flags & CONTEXT_CONF_USED) && config_valid(config, c, &addr, state, now))
{	{
req_addr = &addr;	req_addr = addr;
mark_config_used(c, &addr);	mark_config_used(c, &addr);
if (have_config(config, CONFIG_TIME))	if (have_config(config, CONFIG_TIME))
lease_time = config->lease_time;	lease_time = config->lease_time;
}	}
else if (!(c = address6_available(context, req_addr, solicit_tags, plain_range)))	else if (!(c = address6_available(state->context, &req_addr, solicit_tags, plain_range)))
continue; /* not an address we're allowed */	continue; /* not an address we're allowed */
else if (!check_address(&state, req_addr))	else if (!check_address(state, &req_addr))
continue; /* address leased elsewhere */	continue; /* address leased elsewhere */

/* add address to output packet */	/* add address to output packet */
#ifdef OPTION6_PREFIX_CLASS	add_address(state, c, lease_time, ia_option, &min_time, &req_addr, now);
if (dump_all_prefix_classes && state.ia_type == OPTION6_IA_NA)	mark_context_used(state, &req_addr);
state.send_prefix_class = prefix_class_from_context(c);	get_context_tag(state, c);
#endif
add_address(&state, c, lease_time, requested_time, &min_time, req_addr, rapid_commit != NULL, now);
mark_context_used(&state, context, req_addr);
get_context_tag(&state, c);
address_assigned = 1;	address_assigned = 1;
}	}
}	}

/* Suggest configured address(es) */	/* Suggest configured address(es) */
for (c = context; c; c = c->current)	for (c = state->context; c; c = c->current)
if (!(c->flags & CONTEXT_CONF_USED) &&	if (!(c->flags & CONTEXT_CONF_USED) &&
match_netid(c->filter, solicit_tags, plain_range) &&	match_netid(c->filter, solicit_tags, plain_range) &&
config_valid(config, c, &addr) &&	config_valid(config, c, &addr, state, now))
check_address(&state, &addr))
{	{
mark_config_used(context, &addr);	mark_config_used(state->context, &addr);
if (have_config(config, CONFIG_TIME))	if (have_config(config, CONFIG_TIME))
lease_time = config->lease_time;	lease_time = config->lease_time;
else	else
lease_time = c->lease_time;	lease_time = c->lease_time;

/* add address to output packet */	/* add address to output packet */
#ifdef OPTION6_PREFIX_CLASS	add_address(state, c, lease_time, NULL, &min_time, &addr, now);
if (dump_all_prefix_classes && state.ia_type == OPTION6_IA_NA)	mark_context_used(state, &addr);
state.send_prefix_class = prefix_class_from_context(c);	get_context_tag(state, c);
#endif
add_address(&state, c, lease_time, lease_time, &min_time, &addr, rapid_commit != NULL, now);
mark_context_used(&state, context, &addr);
get_context_tag(&state, c);
address_assigned = 1;	address_assigned = 1;
}	}

/* return addresses for existing leases */	/* return addresses for existing leases */
ltmp = NULL;	ltmp = NULL;
while ((ltmp = lease6_find_by_client(ltmp, state.ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA, state.clid, state.clid_len, state.iaid)))	while ((ltmp = lease6_find_by_client(ltmp, state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA, state->clid, state->clid_len, state->iaid)))
{	{
req_addr = (struct in6_addr *)ltmp->hwaddr;	req_addr = ltmp->addr6;
if ((c = address6_available(context, req_addr, solicit_tags, plain_range)))	if ((c = address6_available(state->context, &req_addr, solicit_tags, plain_range)))
{	{
#ifdef OPTION6_PREFIX_CLASS	add_address(state, c, c->lease_time, NULL, &min_time, &req_addr, now);
if (dump_all_prefix_classes && state.ia_type == OPTION6_IA_NA)	mark_context_used(state, &req_addr);
state.send_prefix_class = prefix_class_from_context(c);	get_context_tag(state, c);
#endif
add_address(&state, c, c->lease_time, c->lease_time, &min_time, req_addr, rapid_commit != NULL, now);
mark_context_used(&state, context, req_addr);
get_context_tag(&state, c);
address_assigned = 1;	address_assigned = 1;
}	}
}	}

/* Return addresses for all valid contexts which don't yet have one */	/* Return addresses for all valid contexts which don't yet have one */
while ((c = address6_allocate(context, state.clid, state.clid_len, state.iaid, ia_counter, solicit_tags, plain_range, &addr)))	while ((c = address6_allocate(state->context, state->clid, state->clid_len, state->ia_type == OPTION6_IA_TA,
	state->iaid, ia_counter, solicit_tags, plain_range, &addr)))
{	{
#ifdef OPTION6_PREFIX_CLASS	add_address(state, c, c->lease_time, NULL, &min_time, &addr, now);
if (dump_all_prefix_classes && state.ia_type == OPTION6_IA_NA)	mark_context_used(state, &addr);
state.send_prefix_class = prefix_class_from_context(c);	get_context_tag(state, c);
#endif
add_address(&state, c, c->lease_time, c->lease_time, &min_time, &addr, rapid_commit != NULL, now);
mark_context_used(&state, context, &addr);
get_context_tag(&state, c);
address_assigned = 1;	address_assigned = 1;
}	}

	if (address_assigned != 1)
	{
	/* If the server will not assign any addresses to any IAs in a
	subsequent Request from the client, the server MUST send an Advertise
	message to the client that doesn't include any IA options. */
	if (!state->lease_allocate)
	{
	save_counter(o);
	continue;
	}

	/* If the server cannot assign any addresses to an IA in the message
	from the client, the server MUST include the IA in the Reply message
	with no addresses in the IA and a Status Code option in the IA
	containing status code NoAddrsAvail. */
	o1 = new_opt6(OPTION6_STATUS_CODE);
	put_opt6_short(DHCP6NOADDRS);
	put_opt6_string(_("address unavailable"));
	end_opt6(o1);
	}

end_ia(t1cntr, min_time, 0);	end_ia(t1cntr, min_time, 0);
end_opt6(o);	end_opt6(o);
}	}
Line 747 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 779 static int dhcp6_no_relay(int msg_type, struct in6_add
o = new_opt6(OPTION6_PREFERENCE);	o = new_opt6(OPTION6_PREFERENCE);
put_opt6_char(option_bool(OPT_AUTHORITATIVE) ? 255 : 0);	put_opt6_char(option_bool(OPT_AUTHORITATIVE) ? 255 : 0);
end_opt6(o);	end_opt6(o);
tagif = add_options(&state, fallback, context);	tagif = add_options(state, 0);
}	}
else	else
{	{
Line 756 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 788 static int dhcp6_no_relay(int msg_type, struct in6_add
put_opt6_short(DHCP6NOADDRS);	put_opt6_short(DHCP6NOADDRS);
put_opt6_string(_("no addresses available"));	put_opt6_string(_("no addresses available"));
end_opt6(o1);	end_opt6(o1);
log6_packet(&state, "DHCPADVERTISE", NULL, _("no addresses available"));
	/* Some clients will ask repeatedly when we're not giving
	out addresses because we're in stateless mode. Avoid spamming
	the log in that case. */
	for (c = state->context; c; c = c->current)
	if (!(c->flags & CONTEXT_RA_STATELESS))
	{
	log6_packet(state, state->lease_allocate ? "DHCPREPLY" : "DHCPADVERTISE", NULL, _("no addresses available"));
	break;
	}
}	}

break;	break;
Line 765 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 806 static int dhcp6_no_relay(int msg_type, struct in6_add
case DHCP6REQUEST:	case DHCP6REQUEST:
{	{
int address_assigned = 0;	int address_assigned = 0;
	int start = save_counter(-1);

/* set reply message type */	/* set reply message type */
*outmsgtypep = DHCP6REPLY;	*outmsgtypep = DHCP6REPLY;
	state->lease_allocate = 1;

log6_packet(&state, "DHCPREQUEST", NULL, ignore ? _("ignored") : NULL);	log6_quiet(state, "DHCPREQUEST", NULL, ignore ? _("ignored") : NULL);

if (ignore)	if (ignore)
return 0;	return 0;

for (opt = state.packet_options; opt; opt = opt6_next(opt, state.end))	for (opt = state->packet_options; opt; opt = opt6_next(opt, state->end))
{	{
void ia_option, ia_end;	void ia_option, ia_end;
unsigned int min_time = 0xffffffff;	unsigned int min_time = 0xffffffff;
int t1cntr;	int t1cntr;

if (!check_ia(&state, opt, &ia_end, &ia_option))	if (!check_ia(state, opt, &ia_end, &ia_option))
continue;	continue;

o = build_ia(&state, &t1cntr);	if (!ia_option)
	{
	/* If we get a request with an IA_*A without addresses, treat it exactly like
	a SOLICT with rapid commit set. */
	save_counter(start);
	goto request_no_address;
	}

	o = build_ia(state, &t1cntr);

for (; ia_option; ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))	for (; ia_option; ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
{	{
struct in6_addr *req_addr = opt6_ptr(ia_option, 0);	struct in6_addr req_addr;
u32 requested_time = opt6_uint(ia_option, 16, 4);
struct dhcp_context dynamic, c;	struct dhcp_context dynamic, c;
unsigned int lease_time;	unsigned int lease_time;
struct in6_addr addr;
int config_ok = 0;	int config_ok = 0;

	/* align. */
	memcpy(&req_addr, opt6_ptr(ia_option, 0), IN6ADDRSZ);

if ((c = address6_valid(context, req_addr, tagif, 1)))	if ((c = address6_valid(state->context, &req_addr, tagif, 1)))
config_ok = config_valid(config, c, &addr) && IN6_ARE_ADDR_EQUAL(&addr, req_addr);	config_ok = (config_implies(config, c, &req_addr) != NULL);

if ((dynamic = address6_available(context, req_addr, tagif, 1)) \|\| c)	if ((dynamic = address6_available(state->context, &req_addr, tagif, 1)) \|\| c)
{	{
if (!dynamic && !config_ok)	if (!dynamic && !config_ok)
{	{
/* Static range, not configured. */	/* Static range, not configured. */
o1 = new_opt6(OPTION6_STATUS_CODE);	o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6UNSPEC);	put_opt6_short(DHCP6NOADDRS);
put_opt6_string(_("address unavailable"));	put_opt6_string(_("address unavailable"));
end_opt6(o1);	end_opt6(o1);
}	}
else if (!check_address(&state, req_addr))	else if (!check_address(state, &req_addr))
{	{
/* Address leased to another DUID/IAID */	/* Address leased to another DUID/IAID */
o1 = new_opt6(OPTION6_STATUS_CODE);	o1 = new_opt6(OPTION6_STATUS_CODE);
Line 825 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 877 static int dhcp6_no_relay(int msg_type, struct in6_add
if (config_ok && have_config(config, CONFIG_TIME))	if (config_ok && have_config(config, CONFIG_TIME))
lease_time = config->lease_time;	lease_time = config->lease_time;

#ifdef OPTION6_PREFIX_CLASS	add_address(state, dynamic, lease_time, ia_option, &min_time, &req_addr, now);
if (dump_all_prefix_classes && state.ia_type == OPTION6_IA_NA)	get_context_tag(state, dynamic);
state.send_prefix_class = prefix_class_from_context(c);
#endif
add_address(&state, dynamic, lease_time, requested_time, &min_time, req_addr, 1, now);
get_context_tag(&state, dynamic);
address_assigned = 1;	address_assigned = 1;
}	}
}	}
Line 862 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 910 static int dhcp6_no_relay(int msg_type, struct in6_add
put_opt6_short(DHCP6NOADDRS);	put_opt6_short(DHCP6NOADDRS);
put_opt6_string(_("no addresses available"));	put_opt6_string(_("no addresses available"));
end_opt6(o1);	end_opt6(o1);
log6_packet(&state, "DHCPREPLY", NULL, _("no addresses available"));	log6_packet(state, "DHCPREPLY", NULL, _("no addresses available"));
}	}

tagif = add_options(&state, fallback, context);	tagif = add_options(state, 0);
break;	break;
}	}

Line 875 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 923 static int dhcp6_no_relay(int msg_type, struct in6_add
/* set reply message type */	/* set reply message type */
*outmsgtypep = DHCP6REPLY;	*outmsgtypep = DHCP6REPLY;

log6_packet(&state, "DHCPRENEW", NULL, NULL);	log6_quiet(state, "DHCPRENEW", NULL, NULL);

for (opt = state.packet_options; opt; opt = opt6_next(opt, state.end))	for (opt = state->packet_options; opt; opt = opt6_next(opt, state->end))
{	{
void ia_option, ia_end;	void ia_option, ia_end;
unsigned int min_time = 0xffffffff;	unsigned int min_time = 0xffffffff;
int t1cntr, iacntr;	int t1cntr, iacntr;

if (!check_ia(&state, opt, &ia_end, &ia_option))	if (!check_ia(state, opt, &ia_end, &ia_option))
continue;	continue;

o = build_ia(&state, &t1cntr);	o = build_ia(state, &t1cntr);
iacntr = save_counter(-1);	iacntr = save_counter(-1);

for (; ia_option; ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))	for (; ia_option; ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
{	{
struct dhcp_lease *lease = NULL;	struct dhcp_lease *lease = NULL;
struct in6_addr *req_addr = opt6_ptr(ia_option, 0);	struct in6_addr req_addr;
u32 requested_time = opt6_uint(ia_option, 16, 4);	unsigned int preferred_time = opt6_uint(ia_option, 16, 4);
unsigned int preferred_time = 0; /* in case renewal inappropriate */	unsigned int valid_time = opt6_uint(ia_option, 20, 4);
unsigned int valid_time = 0;
char *message = NULL;	char *message = NULL;
struct dhcp_context *this_context;	struct dhcp_context *this_context;

	memcpy(&req_addr, opt6_ptr(ia_option, 0), IN6ADDRSZ);

if (!(lease = lease6_find(state.clid, state.clid_len,	if (!(lease = lease6_find(state->clid, state->clid_len,
state.ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA,	state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA,
state.iaid, req_addr)))	state->iaid, &req_addr)))
{	{
/* If the server cannot find a client entry for the IA the server	/* If the server cannot find a client entry for the IA the server
returns the IA containing no addresses with a Status Code option set	returns the IA containing no addresses with a Status Code option set
Line 909 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 958 static int dhcp6_no_relay(int msg_type, struct in6_add
save_counter(iacntr);	save_counter(iacntr);
t1cntr = 0;	t1cntr = 0;

log6_packet(&state, "DHCPREPLY", req_addr, _("lease not found"));	log6_packet(state, "DHCPREPLY", &req_addr, _("lease not found"));

o1 = new_opt6(OPTION6_STATUS_CODE);	o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6NOBINDING);	put_opt6_short(DHCP6NOBINDING);
put_opt6_string(_("no binding found"));	put_opt6_string(_("no binding found"));
end_opt6(o1);	end_opt6(o1);

	preferred_time = valid_time = 0;
break;	break;
}	}


if ((this_context = address6_available(context, req_addr, tagif, 1)) \|\|	if ((this_context = address6_available(state->context, &req_addr, tagif, 1)) \|\|
(this_context = address6_valid(context, req_addr, tagif, 1)))	(this_context = address6_valid(state->context, &req_addr, tagif, 1)))
{	{
struct in6_addr addr;
unsigned int lease_time;	unsigned int lease_time;

get_context_tag(&state, this_context);	get_context_tag(state, this_context);

if (config_valid(config, this_context, &addr) && IN6_ARE_ADDR_EQUAL(&addr, req_addr) && have_config(config, CONFIG_TIME))	if (config_implies(config, this_context, &req_addr) && have_config(config, CONFIG_TIME))
lease_time = config->lease_time;	lease_time = config->lease_time;
else	else
lease_time = this_context->lease_time;	lease_time = this_context->lease_time;

calculate_times(this_context, &min_time, &valid_time, &preferred_time, lease_time, requested_time);	calculate_times(this_context, &min_time, &valid_time, &preferred_time, lease_time);

lease_set_expires(lease, valid_time, now);	lease_set_expires(lease, valid_time, now);
if (state.ia_type == OPTION6_IA_NA && state.hostname)	/* Update MAC record in case it's new information. */
	if (state->mac_len != 0)
	lease_set_hwaddr(lease, state->mac, state->clid, state->mac_len, state->mac_type, state->clid_len, now, 0);
	if (state->ia_type == OPTION6_IA_NA && state->hostname)
{	{
char *addr_domain = get_domain6(req_addr);	char *addr_domain = get_domain6(&req_addr);
if (!state.send_domain)	if (!state->send_domain)
state.send_domain = addr_domain;	state->send_domain = addr_domain;
lease_set_hostname(lease, state.hostname, state.hostname_auth, addr_domain, state.domain);	lease_set_hostname(lease, state->hostname, state->hostname_auth, addr_domain, state->domain);
message = state.hostname;	message = state->hostname;
}	}


Line 949 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1002 static int dhcp6_no_relay(int msg_type, struct in6_add
message = _("deprecated");	message = _("deprecated");
}	}
else	else
message = _("address invalid");	{
	preferred_time = valid_time = 0;
log6_packet(&state, "DHCPREPLY", req_addr, message);	message = _("address invalid");
	}

	if (message && (message != state->hostname))
	log6_packet(state, "DHCPREPLY", &req_addr, message);
	else
	log6_quiet(state, "DHCPREPLY", &req_addr, message);

o1 = new_opt6(OPTION6_IAADDR);	o1 = new_opt6(OPTION6_IAADDR);
put_opt6(req_addr, sizeof(*req_addr));	put_opt6(&req_addr, sizeof(req_addr));
put_opt6_long(preferred_time);	put_opt6_long(preferred_time);
put_opt6_long(valid_time);	put_opt6_long(valid_time);
end_opt6(o1);	end_opt6(o1);
Line 964 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1023 static int dhcp6_no_relay(int msg_type, struct in6_add
end_opt6(o);	end_opt6(o);
}	}

tagif = add_options(&state, fallback, context);	tagif = add_options(state, 0);
break;	break;

}	}

case DHCP6CONFIRM:	case DHCP6CONFIRM:
{	{
	int good_addr = 0;

/* set reply message type */	/* set reply message type */
*outmsgtypep = DHCP6REPLY;	*outmsgtypep = DHCP6REPLY;

log6_packet(&state, "DHCPCONFIRM", NULL, NULL);	log6_quiet(state, "DHCPCONFIRM", NULL, NULL);

for (opt = state.packet_options; opt; opt = opt6_next(opt, state.end))	for (opt = state->packet_options; opt; opt = opt6_next(opt, state->end))
{	{
void ia_option, ia_end;	void ia_option, ia_end;

for (check_ia(&state, opt, &ia_end, &ia_option);	for (check_ia(state, opt, &ia_end, &ia_option);
ia_option;	ia_option;
ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))	ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
{	{
struct in6_addr *req_addr = opt6_ptr(ia_option, 0);	struct in6_addr req_addr;

	/* alignment */
	memcpy(&req_addr, opt6_ptr(ia_option, 0), IN6ADDRSZ);

if (!address6_available(context, req_addr, tagif, 1))	if (!address6_valid(state->context, &req_addr, tagif, 1))
{	{
o1 = new_opt6(OPTION6_STATUS_CODE);	o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6NOTONLINK);	put_opt6_short(DHCP6NOTONLINK);
put_opt6_string(_("confirm failed"));	put_opt6_string(_("confirm failed"));
end_opt6(o1);	end_opt6(o1);
	log6_quiet(state, "DHCPREPLY", &req_addr, _("confirm failed"));
return 1;	return 1;
}	}

log6_packet(&state, "DHCPREPLY", req_addr, state.hostname);	good_addr = 1;
	log6_quiet(state, "DHCPREPLY", &req_addr, state->hostname);
}	}
}	}

	/* No addresses, no reply: RFC 3315 18.2.2 */
	if (!good_addr)
	return 0;

o1 = new_opt6(OPTION6_STATUS_CODE);	o1 = new_opt6(OPTION6_STATUS_CODE);
put_opt6_short(DHCP6SUCCESS );	put_opt6_short(DHCP6SUCCESS );
Line 1010 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1080 static int dhcp6_no_relay(int msg_type, struct in6_add
{	{
/* We can't discriminate contexts based on address, as we don't know it.	/* We can't discriminate contexts based on address, as we don't know it.
If there is only one possible context, we can use its tags */	If there is only one possible context, we can use its tags */
if (context && context->netid.net && !context->current)	if (state->context && state->context->netid.net && !state->context->current)
{	{
context->netid.next = NULL;	state->context->netid.next = NULL;
state.context_tags = &context->netid;	state->context_tags = &state->context->netid;
}	}
log6_packet(&state, "DHCPINFORMATION-REQUEST", NULL, ignore ? _("ignored") : state.hostname);
	/* Similarly, we can't determine domain from address, but if the FQDN is
	given in --dhcp-host, we can use that, and failing that we can use the
	unqualified configured domain, if any. */
	if (state->hostname_auth)
	state->send_domain = state->domain;
	else
	state->send_domain = get_domain6(NULL);

	log6_quiet(state, "DHCPINFORMATION-REQUEST", NULL, ignore ? _("ignored") : state->hostname);
if (ignore)	if (ignore)
return 0;	return 0;
*outmsgtypep = DHCP6REPLY;	*outmsgtypep = DHCP6REPLY;
tagif = add_options(&state, fallback, context);	tagif = add_options(state, 1);
break;	break;
}	}

Line 1029 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1108 static int dhcp6_no_relay(int msg_type, struct in6_add
/* set reply message type */	/* set reply message type */
*outmsgtypep = DHCP6REPLY;	*outmsgtypep = DHCP6REPLY;

log6_packet(&state, "DHCPRELEASE", NULL, NULL);	log6_quiet(state, "DHCPRELEASE", NULL, NULL);

for (opt = state.packet_options; opt; opt = opt6_next(opt, state.end))	for (opt = state->packet_options; opt; opt = opt6_next(opt, state->end))
{	{
void ia_option, ia_end;	void ia_option, ia_end;
int made_ia = 0;	int made_ia = 0;

for (check_ia(&state, opt, &ia_end, &ia_option);	for (check_ia(state, opt, &ia_end, &ia_option);
ia_option;	ia_option;
ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))	ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
{	{
struct dhcp_lease *lease;	struct dhcp_lease *lease;
	struct in6_addr addr;
if ((lease = lease6_find(state.clid, state.clid_len, state.ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA,
state.iaid, opt6_ptr(ia_option, 0))))	/* align */
	memcpy(&addr, opt6_ptr(ia_option, 0), IN6ADDRSZ);
	if ((lease = lease6_find(state->clid, state->clid_len, state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA,
	state->iaid, &addr)))
lease_prune(lease, now);	lease_prune(lease, now);
else	else
{	{
if (!made_ia)	if (!made_ia)
{	{
o = new_opt6(state.ia_type);	o = new_opt6(state->ia_type);
put_opt6_long(state.iaid);	put_opt6_long(state->iaid);
if (state.ia_type == OPTION6_IA_NA)	if (state->ia_type == OPTION6_IA_NA)
{	{
put_opt6_long(0);	put_opt6_long(0);
put_opt6_long(0);	put_opt6_long(0);
Line 1060 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1142 static int dhcp6_no_relay(int msg_type, struct in6_add
}	}

o1 = new_opt6(OPTION6_IAADDR);	o1 = new_opt6(OPTION6_IAADDR);
put_opt6(opt6_ptr(ia_option, 0), IN6ADDRSZ);	put_opt6(&addr, IN6ADDRSZ);
put_opt6_long(0);	put_opt6_long(0);
put_opt6_long(0);	put_opt6_long(0);
end_opt6(o1);	end_opt6(o1);
Line 1091 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1173 static int dhcp6_no_relay(int msg_type, struct in6_add
/* set reply message type */	/* set reply message type */
*outmsgtypep = DHCP6REPLY;	*outmsgtypep = DHCP6REPLY;

log6_packet(&state, "DHCPDECLINE", NULL, NULL);	log6_quiet(state, "DHCPDECLINE", NULL, NULL);

for (opt = state.packet_options; opt; opt = opt6_next(opt, state.end))	for (opt = state->packet_options; opt; opt = opt6_next(opt, state->end))
{	{
void ia_option, ia_end;	void ia_option, ia_end;
int made_ia = 0;	int made_ia = 0;

for (check_ia(&state, opt, &ia_end, &ia_option);	for (check_ia(state, opt, &ia_end, &ia_option);
ia_option;	ia_option;
ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))	ia_option = opt6_find(opt6_next(ia_option, ia_end), ia_end, OPTION6_IAADDR, 24))
{	{
struct dhcp_lease *lease;	struct dhcp_lease *lease;
struct in6_addr *addrp = opt6_ptr(ia_option, 0);	struct in6_addr addr;
	struct addrlist *addr_list;

	/* align */
	memcpy(&addr, opt6_ptr(ia_option, 0), IN6ADDRSZ);

if (have_config(config, CONFIG_ADDR6) && IN6_ARE_ADDR_EQUAL(&config->addr6, addrp))	if ((addr_list = config_implies(config, state->context, &addr)))
{	{
prettyprint_time(daemon->dhcp_buff3, DECLINE_BACKOFF);	prettyprint_time(daemon->dhcp_buff3, DECLINE_BACKOFF);
inet_ntop(AF_INET6, addrp, daemon->addrbuff, ADDRSTRLEN);	inet_ntop(AF_INET6, &addr, daemon->addrbuff, ADDRSTRLEN);
my_syslog(MS_DHCP \| LOG_WARNING, _("disabling DHCP static address %s for %s"),	my_syslog(MS_DHCP \| LOG_WARNING, _("disabling DHCP static address %s for %s"),
daemon->addrbuff, daemon->dhcp_buff3);	daemon->addrbuff, daemon->dhcp_buff3);
config->flags \|= CONFIG_DECLINED;	addr_list->flags \|= ADDRLIST_DECLINED;
config->decline_time = now;	addr_list->decline_time = now;
}	}
else	else
/* make sure this host gets a different address next time. */	/* make sure this host gets a different address next time. */
for (; context; context = context->current)	for (context_tmp = state->context; context_tmp; context_tmp = context_tmp->current)
context->addr_epoch++;	context_tmp->addr_epoch++;

if ((lease = lease6_find(state.clid, state.clid_len, state.ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA,	if ((lease = lease6_find(state->clid, state->clid_len, state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA,
state.iaid, opt6_ptr(ia_option, 0))))	state->iaid, &addr)))
lease_prune(lease, now);	lease_prune(lease, now);
else	else
{	{
if (!made_ia)	if (!made_ia)
{	{
o = new_opt6(state.ia_type);	o = new_opt6(state->ia_type);
put_opt6_long(state.iaid);	put_opt6_long(state->iaid);
if (state.ia_type == OPTION6_IA_NA)	if (state->ia_type == OPTION6_IA_NA)
{	{
put_opt6_long(0);	put_opt6_long(0);
put_opt6_long(0);	put_opt6_long(0);
Line 1137 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1223 static int dhcp6_no_relay(int msg_type, struct in6_add
}	}

o1 = new_opt6(OPTION6_IAADDR);	o1 = new_opt6(OPTION6_IAADDR);
put_opt6(opt6_ptr(ia_option, 0), IN6ADDRSZ);	put_opt6(&addr, IN6ADDRSZ);
put_opt6_long(0);	put_opt6_long(0);
put_opt6_long(0);	put_opt6_long(0);
end_opt6(o1);	end_opt6(o1);
Line 1155 static int dhcp6_no_relay(int msg_type, struct in6_add	Line 1241 static int dhcp6_no_relay(int msg_type, struct in6_add
}	}

}	}

	/* We must answer with 'success' in global section anyway */
	o1 = new_opt6(OPTION6_STATUS_CODE);
	put_opt6_short(DHCP6SUCCESS);
	put_opt6_string(_("success"));
	end_opt6(o1);
break;	break;
}	}

}	}

log_tags(tagif, state.xid);	log_tags(tagif, state->xid);
	log6_opts(0, state->xid, daemon->outpacket.iov_base + start_opts, daemon->outpacket.iov_base + save_counter(-1));

if (option_bool(OPT_LOG_OPTS))
log6_opts(0, state.xid, daemon->outpacket.iov_base + start_opts, daemon->outpacket.iov_base + save_counter(-1));

return 1;	return 1;

}	}

struct dhcp_netid add_options(struct state state, struct in6_addr fallback, struct dhcp_context context)	static struct dhcp_netid add_options(struct state state, int do_refresh)
{	{
void *oro;	void *oro;
/* filter options based on tags, those we want get DHOPT_TAGOK bit set */	/* filter options based on tags, those we want get DHOPT_TAGOK bit set */
struct dhcp_netid *tagif = option_filter(state->tags, state->context_tags, daemon->dhcp_opts6);	struct dhcp_netid *tagif = option_filter(state->tags, state->context_tags, daemon->dhcp_opts6);
struct dhcp_opt *opt_cfg;	struct dhcp_opt *opt_cfg;
int done_dns = 0, do_encap = 0;	int done_dns = 0, done_refresh = !do_refresh, do_encap = 0;
int i, o, o1;	int i, o, o1;

oro = opt6_find(state->packet_options, state->end, OPTION6_ORO, 0);	oro = opt6_find(state->packet_options, state->end, OPTION6_ORO, 0);
Line 1197 struct dhcp_netid add_options(struct state state, st	Line 1287 struct dhcp_netid add_options(struct state state, st
continue;	continue;
}	}

	if (opt_cfg->opt == OPTION6_REFRESH_TIME)
	done_refresh = 1;

if (opt_cfg->opt == OPTION6_DNS_SERVER)	if (opt_cfg->opt == OPTION6_DNS_SERVER)
{	done_dns = 1;
done_dns = 1;
if (opt_cfg->len == 0)
continue;
}

o = new_opt6(opt_cfg->opt);
if (opt_cfg->flags & DHOPT_ADDR6)	if (opt_cfg->flags & DHOPT_ADDR6)
{	{
int j;	int len, j;
struct in6_addr a = (struct in6_addr )opt_cfg->val;	struct in6_addr *a;
for (j = 0; j < opt_cfg->len; j+=IN6ADDRSZ, a++)
{	for (a = (struct in6_addr *)opt_cfg->val, len = opt_cfg->len, j = 0;
/* zero means "self" (but not in vendorclass options.) */	j < opt_cfg->len; j += IN6ADDRSZ, a++)
if (IN6_IS_ADDR_UNSPECIFIED(a))	if ((IN6_IS_ADDR_ULA_ZERO(a) && IN6_IS_ADDR_UNSPECIFIED(state->ula_addr)) \|\|
{	(IN6_IS_ADDR_LINK_LOCAL_ZERO(a) && IN6_IS_ADDR_UNSPECIFIED(state->ll_addr)))
if (!add_local_addrs(context))	len -= IN6ADDRSZ;
put_opt6(fallback, IN6ADDRSZ);
	if (len != 0)
	{

	o = new_opt6(opt_cfg->opt);

	for (a = (struct in6_addr *)opt_cfg->val, j = 0; j < opt_cfg->len; j+=IN6ADDRSZ, a++)
	{
	struct in6_addr *p = NULL;

	if (IN6_IS_ADDR_UNSPECIFIED(a))
	{
	if (!add_local_addrs(state->context))
	p = state->fallback;
	}
	else if (IN6_IS_ADDR_ULA_ZERO(a))
	{
	if (!IN6_IS_ADDR_UNSPECIFIED(state->ula_addr))
	p = state->ula_addr;
	}
	else if (IN6_IS_ADDR_LINK_LOCAL_ZERO(a))
	{
	if (!IN6_IS_ADDR_UNSPECIFIED(state->ll_addr))
	p = state->ll_addr;
	}
	else
	p = a;

	if (!p)
	continue;
	else if (opt_cfg->opt == OPTION6_NTP_SERVER)
	{
	if (IN6_IS_ADDR_MULTICAST(p))
	o1 = new_opt6(NTP_SUBOPTION_MC_ADDR);
	else
	o1 = new_opt6(NTP_SUBOPTION_SRV_ADDR);
	put_opt6(p, IN6ADDRSZ);
	end_opt6(o1);
	}
	else
	put_opt6(p, IN6ADDRSZ);
}	}
else
put_opt6(a, IN6ADDRSZ);	end_opt6(o);
}	}
}	}
else if (opt_cfg->val)	else
put_opt6(opt_cfg->val, opt_cfg->len);	{
end_opt6(o);	o = new_opt6(opt_cfg->opt);
	if (opt_cfg->val)
	put_opt6(opt_cfg->val, opt_cfg->len);
	end_opt6(o);
	}
}	}

if (daemon->port == NAMESERVER_PORT && !done_dns &&	if (daemon->port == NAMESERVER_PORT && !done_dns)
(!IN6_IS_ADDR_UNSPECIFIED(&context->local6) \|\|
!IN6_IS_ADDR_UNSPECIFIED(fallback)))
{	{
o = new_opt6(OPTION6_DNS_SERVER);	o = new_opt6(OPTION6_DNS_SERVER);
if (!add_local_addrs(context))	if (!add_local_addrs(state->context))
put_opt6(fallback, IN6ADDRSZ);	put_opt6(state->fallback, IN6ADDRSZ);
end_opt6(o);	end_opt6(o);
}	}

	if (state->context && !done_refresh)
	{
	struct dhcp_context *c;
	unsigned int lease_time = 0xffffffff;

	/* Find the smallest lease tie of all contexts,
	subject to the RFC-4242 stipulation that this must not
	be less than 600. */
	for (c = state->context; c; c = c->next)
	if (c->lease_time < lease_time)
	{
	if (c->lease_time < 600)
	lease_time = 600;
	else
	lease_time = c->lease_time;
	}

	o = new_opt6(OPTION6_REFRESH_TIME);
	put_opt6_long(lease_time);
	end_opt6(o);
	}

/* handle vendor-identifying vendor-encapsulated options,	/* handle vendor-identifying vendor-encapsulated options,
dhcp-option = vi-encap:13,17,....... */	dhcp-option = vi-encap:13,17,....... */
Line 1299 struct dhcp_netid add_options(struct state state, st	Line 1451 struct dhcp_netid add_options(struct state state, st
size_t len = strlen(state->hostname);	size_t len = strlen(state->hostname);

if (state->send_domain)	if (state->send_domain)
len += strlen(state->send_domain) + 1;	len += strlen(state->send_domain) + 2;

o = new_opt6(OPTION6_FQDN);	o = new_opt6(OPTION6_FQDN);
if ((p = expand(len + 3)))	if ((p = expand(len + 2)))
{	{
*(p++) = state->fqdn_flags;	*(p++) = state->fqdn_flags;
p = do_rfc1035_name(p, state->hostname);	p = do_rfc1035_name(p, state->hostname, NULL);
if (state->send_domain)	if (state->send_domain)
p = do_rfc1035_name(p, state->send_domain);	{
*p = 0;	p = do_rfc1035_name(p, state->send_domain, NULL);
	*p = 0;
	}
}	}
end_opt6(o);	end_opt6(o);
}	}
Line 1383 static void get_context_tag(struct state *state, struc	Line 1537 static void get_context_tag(struct state *state, struc
}	}
}	}

#ifdef OPTION6_PREFIX_CLASS
static struct prefix_class prefix_class_from_context(struct dhcp_context context)
{
struct prefix_class *p;
struct dhcp_netid *t;

for (p = daemon->prefix_classes; p ; p = p->next)
for (t = context->filter; t; t = t->next)
if (strcmp(p->tag.net, t->net) == 0)
return p;

return NULL;
}
#endif

static int check_ia(struct state state, void opt, void endp, void ia_option)	static int check_ia(struct state state, void opt, void endp, void ia_option)
{	{
state->ia_type = opt6_type(opt);	state->ia_type = opt6_type(opt);
Line 1443 static void end_ia(int t1cntr, unsigned int min_time,	Line 1582 static void end_ia(int t1cntr, unsigned int min_time,
{	{
if (t1cntr != 0)	if (t1cntr != 0)
{	{
/* go back an fill in fields in IA_NA option */	/* go back and fill in fields in IA_NA option */
int sav = save_counter(t1cntr);	int sav = save_counter(t1cntr);
unsigned int t1, t2, fuzz = 0;	unsigned int t1, t2, fuzz = 0;

Line 1463 static void end_ia(int t1cntr, unsigned int min_time,	Line 1602 static void end_ia(int t1cntr, unsigned int min_time,
}	}
}	}

static void add_address(struct state state, struct dhcp_context context, unsigned int lease_time, unsigned int requested_time,	static void add_address(struct state state, struct dhcp_context context, unsigned int lease_time, void *ia_option,
unsigned int min_time, struct in6_addr addr, int do_update, time_t now)	unsigned int min_time, struct in6_addr addr, time_t now)
{	{
unsigned int valid_time, preferred_time;	unsigned int valid_time = 0, preferred_time = 0;
int o = new_opt6(OPTION6_IAADDR);	int o = new_opt6(OPTION6_IAADDR);
struct dhcp_lease *lease;	struct dhcp_lease *lease;

calculate_times(context, min_time, &valid_time, &preferred_time, lease_time, requested_time);	/* get client requested times */
	if (ia_option)
	{
	preferred_time = opt6_uint(ia_option, 16, 4);
	valid_time = opt6_uint(ia_option, 20, 4);
	}

	calculate_times(context, min_time, &valid_time, &preferred_time, lease_time);

put_opt6(addr, sizeof(*addr));	put_opt6(addr, sizeof(*addr));
put_opt6_long(preferred_time);	put_opt6_long(preferred_time);
put_opt6_long(valid_time);	put_opt6_long(valid_time);

#ifdef OPTION6_PREFIX_CLASS
if (state->send_prefix_class)
{
int o1 = new_opt6(OPTION6_PREFIX_CLASS);
put_opt6_short(state->send_prefix_class->class);
end_opt6(o1);
}
#endif

end_opt6(o);	end_opt6(o);

if (do_update)	if (state->lease_allocate)
update_leases(state, context, addr, valid_time, now);	update_leases(state, context, addr, valid_time, now);

if ((lease = lease6_find_by_addr(addr, 128, 0)))	if ((lease = lease6_find_by_addr(addr, 128, 0)))
Line 1511 static void add_address(struct state *state, struct dh	Line 1647 static void add_address(struct state *state, struct dh
}	}
}	}

log6_packet(state, do_update ? "DHCPREPLY" : "DHCPADVERTISE", addr, state->hostname);	log6_quiet(state, state->lease_allocate ? "DHCPREPLY" : "DHCPADVERTISE", addr, state->hostname);

}	}

static void mark_context_used(struct state state, struct dhcp_context context, struct in6_addr *addr)	static void mark_context_used(struct state state, struct in6_addr addr)
{	{
	struct dhcp_context *context;

/* Mark that we have an address for this prefix. */	/* Mark that we have an address for this prefix. */
#ifdef OPTION6_PREFIX_CLASS	for (context = state->context; context; context = context->current)
for (; context; context = context->current)
if (is_same_net6(addr, &context->start6, context->prefix) &&
(!state->send_prefix_class \|\| state->send_prefix_class == prefix_class_from_context(context)))
context->flags \|= CONTEXT_USED;
#else
(void)state; /* warning */
for (; context; context = context->current)
if (is_same_net6(addr, &context->start6, context->prefix))	if (is_same_net6(addr, &context->start6, context->prefix))
context->flags \|= CONTEXT_USED;	context->flags \|= CONTEXT_USED;
#endif
}	}

static void mark_config_used(struct dhcp_context context, struct in6_addr addr)	static void mark_config_used(struct dhcp_context context, struct in6_addr addr)
Line 1548 static int check_address(struct state *state, struct i	Line 1678 static int check_address(struct state *state, struct i

if (lease->clid_len != state->clid_len \|\|	if (lease->clid_len != state->clid_len \|\|
memcmp(lease->clid, state->clid, state->clid_len) != 0 \|\|	memcmp(lease->clid, state->clid, state->clid_len) != 0 \|\|
lease->hwaddr_type != state->iaid)	lease->iaid != state->iaid)
return 0;	return 0;

return 1;	return 1;
}	}

static void calculate_times(struct dhcp_context context, unsigned int min_time, unsigned int *valid_timep,
unsigned int *preferred_timep, unsigned int lease_time, unsigned int requested_time)	/* return true of addr could have been generated from config. /
	static struct addrlist config_implies(struct dhcp_config config, struct dhcp_context context, struct in6_addr addr)
{	{
unsigned int preferred_time, valid_time;	int prefix;
	struct in6_addr wild_addr;
	struct addrlist *addr_list;

	if (!config \|\| !(config->flags & CONFIG_ADDR6))
	return NULL;

	for (addr_list = config->addr6; addr_list; addr_list = addr_list->next)
	{
	prefix = (addr_list->flags & ADDRLIST_PREFIX) ? addr_list->prefixlen : 128;
	wild_addr = addr_list->addr.addr6;

	if ((addr_list->flags & ADDRLIST_WILDCARD) && context->prefix == 64)
	{
	wild_addr = context->start6;
	setaddr6part(&wild_addr, addr6part(&addr_list->addr.addr6));
	}
	else if (!is_same_net6(&context->start6, addr, context->prefix))
	continue;

	if (is_same_net6(&wild_addr, addr, prefix))
	return addr_list;
	}

	return NULL;
	}

if (requested_time < 120u )	static int config_valid(struct dhcp_config config, struct dhcp_context context, struct in6_addr addr, struct state state, time_t now)
requested_time = 120u; /* sanity */	{
if (lease_time == 0xffffffff \|\| (requested_time != 0xffffffff && requested_time < lease_time))	u64 addrpart, i, addresses;
lease_time = requested_time;	struct addrlist *addr_list;

valid_time = (context->valid < lease_time) ? context->valid : lease_time;	if (!config \|\| !(config->flags & CONFIG_ADDR6))
preferred_time = (context->preferred < lease_time) ? context->preferred : lease_time;	return 0;

if (context->flags & CONTEXT_DEPRECATE)	for (addr_list = config->addr6; addr_list; addr_list = addr_list->next)
preferred_time = 0;	if (!(addr_list->flags & ADDRLIST_DECLINED) \|\|
	difftime(now, addr_list->decline_time) >= (float)DECLINE_BACKOFF)
	{
	addrpart = addr6part(&addr_list->addr.addr6);
	addresses = 1;

	if (addr_list->flags & ADDRLIST_PREFIX)
	addresses = (u64)1<<(128-addr_list->prefixlen);

	if ((addr_list->flags & ADDRLIST_WILDCARD))
	{
	if (context->prefix != 64)
	continue;

	*addr = context->start6;
	}
	else if (is_same_net6(&context->start6, &addr_list->addr.addr6, context->prefix))
	*addr = addr_list->addr.addr6;
	else
	continue;

	for (i = 0 ; i < addresses; i++)
	{
	setaddr6part(addr, addrpart+i);

	if (check_address(state, addr))
	return 1;
	}
	}

	return 0;
	}

	/* Calculate valid and preferred times to send in leases/renewals.

	Inputs are:

	valid_timep, preferred_timep - requested times from IAADDR options.
	context->valid, context->preferred - times associated with subnet address on local interface.
	context->flags \| CONTEXT_DEPRECATE - "deprecated" flag in dhcp-range.
	lease_time - configured time for context for individual client.
	*min_time - smallest valid time sent so far.

	Outputs are :

	valid_timep, preferred_timep - times to be send in IAADDR option.
	*min_time - smallest valid time sent so far, to calculate T1 and T2.

	*/
	static void calculate_times(struct dhcp_context context, unsigned int min_time, unsigned int *valid_timep,
	unsigned int *preferred_timep, unsigned int lease_time)
	{
	unsigned int req_preferred = preferred_timep, req_valid = valid_timep;
	unsigned int valid_time = lease_time, preferred_time = lease_time;

	/* RFC 3315: "A server ignores the lifetimes set
	by the client if the preferred lifetime is greater than the valid
	lifetime. */
	if (req_preferred <= req_valid)
	{
	if (req_preferred != 0)
	{
	/* 0 == "no preference from client" */
	if (req_preferred < 120u)
	req_preferred = 120u; /* sanity */

	if (req_preferred < preferred_time)
	preferred_time = req_preferred;
	}

	if (req_valid != 0)
	/* 0 == "no preference from client" */
	{
	if (req_valid < 120u)
	req_valid = 120u; /* sanity */

	if (req_valid < valid_time)
	valid_time = req_valid;
	}
	}

	/* deprecate (preferred == 0) which configured, or when local address
	is deprecated */
	if ((context->flags & CONTEXT_DEPRECATE) \|\| context->preferred == 0)
	preferred_time = 0;

if (preferred_time != 0 && preferred_time < *min_time)	if (preferred_time != 0 && preferred_time < *min_time)
*min_time = preferred_time;	*min_time = preferred_time;

Line 1583 static void calculate_times(struct dhcp_context *conte	Line 1823 static void calculate_times(struct dhcp_context *conte
static void update_leases(struct state state, struct dhcp_context context, struct in6_addr *addr, unsigned int lease_time, time_t now)	static void update_leases(struct state state, struct dhcp_context context, struct in6_addr *addr, unsigned int lease_time, time_t now)
{	{
struct dhcp_lease *lease = lease6_find_by_addr(addr, 128, 0);	struct dhcp_lease *lease = lease6_find_by_addr(addr, 128, 0);
	#ifdef HAVE_SCRIPT
struct dhcp_netid *tagif = run_tag_if(state->tags);	struct dhcp_netid *tagif = run_tag_if(state->tags);
	#endif

	(void)context;

if (!lease)	if (!lease)
lease = lease6_allocate(addr, state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA);	lease = lease6_allocate(addr, state->ia_type == OPTION6_IA_NA ? LEASE_NA : LEASE_TA);

if (lease)	if (lease)
{	{
lease_set_expires(lease, lease_time, now);	lease_set_expires(lease, lease_time, now);
lease_set_hwaddr(lease, NULL, state->clid, 0, state->iaid, state->clid_len, now, 0);	lease_set_iaid(lease, state->iaid);
	lease_set_hwaddr(lease, state->mac, state->clid, state->mac_len, state->mac_type, state->clid_len, now, 0);
lease_set_interface(lease, state->interface, now);	lease_set_interface(lease, state->interface, now);
if (state->hostname && state->ia_type == OPTION6_IA_NA)	if (state->hostname && state->ia_type == OPTION6_IA_NA)
{	{
Line 1678 static void log6_opts(int nest, unsigned int xid, void	Line 1923 static void log6_opts(int nest, unsigned int xid, void
void *opt;	void *opt;
char *desc = nest ? "nest" : "sent";	char *desc = nest ? "nest" : "sent";

if (start_opts == end_opts)	if (!option_bool(OPT_LOG_OPTS) \|\| start_opts == end_opts)
return;	return;

for (opt = start_opts; opt; opt = opt6_next(opt, end_opts))	for (opt = start_opts; opt; opt = opt6_next(opt, end_opts))
Line 1702 static void log6_opts(int nest, unsigned int xid, void	Line 1947 static void log6_opts(int nest, unsigned int xid, void
}	}
else if (type == OPTION6_IAADDR)	else if (type == OPTION6_IAADDR)
{	{
inet_ntop(AF_INET6, opt6_ptr(opt, 0), daemon->addrbuff, ADDRSTRLEN);	struct in6_addr addr;

	/* align */
	memcpy(&addr, opt6_ptr(opt, 0), IN6ADDRSZ);
	inet_ntop(AF_INET6, &addr, daemon->addrbuff, ADDRSTRLEN);
sprintf(daemon->namebuff, "%s PL=%u VL=%u",	sprintf(daemon->namebuff, "%s PL=%u VL=%u",
daemon->addrbuff, opt6_uint(opt, 16, 4), opt6_uint(opt, 20, 4));	daemon->addrbuff, opt6_uint(opt, 16, 4), opt6_uint(opt, 20, 4));
optname = "iaaddr";	optname = "iaaddr";
ia_options = opt6_ptr(opt, 24);	ia_options = opt6_ptr(opt, 24);
}	}
#ifdef OPTION6_PREFIX_CLASS
else if (type == OPTION6_PREFIX_CLASS)
{
optname = "prefix-class";
sprintf(daemon->namebuff, "class=%u", opt6_uint(opt, 0, 2));
}
#endif
else if (type == OPTION6_STATUS_CODE)	else if (type == OPTION6_STATUS_CODE)
{	{
int len = sprintf(daemon->namebuff, "%u ", opt6_uint(opt, 0, 2));	int len = sprintf(daemon->namebuff, "%u ", opt6_uint(opt, 0, 2));
Line 1737 static void log6_opts(int nest, unsigned int xid, void	Line 1979 static void log6_opts(int nest, unsigned int xid, void
}	}
}	}

	static void log6_quiet(struct state state, char type, struct in6_addr addr, char string)
	{
	if (option_bool(OPT_LOG_OPTS) \|\| !option_bool(OPT_QUIET_DHCP6))
	log6_packet(state, type, addr, string);
	}

static void log6_packet(struct state state, char type, struct in6_addr addr, char string)	static void log6_packet(struct state state, char type, struct in6_addr addr, char string)
{	{
int clid_len = state->clid_len;	int clid_len = state->clid_len;
Line 1749 static void log6_packet(struct state state, char typ	Line 1997 static void log6_packet(struct state state, char typ

if (addr)	if (addr)
{	{
inet_ntop(AF_INET6, addr, daemon->dhcp_buff2, 255);	inet_ntop(AF_INET6, addr, daemon->dhcp_buff2, DHCP_BUFF_SZ - 1);
strcat(daemon->dhcp_buff2, " ");	strcat(daemon->dhcp_buff2, " ");
}	}
else	else
Line 1827 static unsigned int opt6_uint(unsigned char *opt, int	Line 2075 static unsigned int opt6_uint(unsigned char *opt, int

return ret;	return ret;
}	}

	void relay_upstream6(struct dhcp_relay *relay, ssize_t sz,
	struct in6_addr *peer_address, u32 scope_id, time_t now)
	{
	/* ->local is same value for all relays on ->current chain */

	union all_addr from;
	unsigned char *header;
	unsigned char *inbuff = daemon->dhcp_packet.iov_base;
	int msg_type = *inbuff;
	int hopcount;
	struct in6_addr multicast;
	unsigned int maclen, mactype;
	unsigned char mac[DHCP_CHADDR_MAX];

	inet_pton(AF_INET6, ALL_SERVERS, &multicast);
	get_client_mac(peer_address, scope_id, mac, &maclen, &mactype, now);

	/* source address == relay address */
	from.addr6 = relay->local.addr6;

	/* Get hop count from nested relayed message */
	if (msg_type == DHCP6RELAYFORW)
	hopcount = ((unsigned char )inbuff+1) + 1;
	else
	hopcount = 0;

	/* RFC 3315 HOP_COUNT_LIMIT */
	if (hopcount > 32)
	return;

	reset_counter();

	if ((header = put_opt6(NULL, 34)))
	{
	int o;

	header[0] = DHCP6RELAYFORW;
	header[1] = hopcount;
	memcpy(&header[2], &relay->local.addr6, IN6ADDRSZ);
	memcpy(&header[18], peer_address, IN6ADDRSZ);

	/* RFC-6939 */
	if (maclen != 0)
	{
	o = new_opt6(OPTION6_CLIENT_MAC);
	put_opt6_short(mactype);
	put_opt6(mac, maclen);
	end_opt6(o);
	}

	o = new_opt6(OPTION6_RELAY_MSG);
	put_opt6(inbuff, sz);
	end_opt6(o);

	for (; relay; relay = relay->current)
	{
	union mysockaddr to;

	to.sa.sa_family = AF_INET6;
	to.in6.sin6_addr = relay->server.addr6;
	to.in6.sin6_port = htons(DHCPV6_SERVER_PORT);
	to.in6.sin6_flowinfo = 0;
	to.in6.sin6_scope_id = 0;

	if (IN6_ARE_ADDR_EQUAL(&relay->server.addr6, &multicast))
	{
	int multicast_iface;
	if (!relay->interface \|\| strchr(relay->interface, '*') \|\|
	(multicast_iface = if_nametoindex(relay->interface)) == 0 \|\|
	setsockopt(daemon->dhcp6fd, IPPROTO_IPV6, IPV6_MULTICAST_IF, &multicast_iface, sizeof(multicast_iface)) == -1)
	my_syslog(MS_DHCP \| LOG_ERR, _("Cannot multicast to DHCPv6 server without correct interface"));
	}

	send_from(daemon->dhcp6fd, 0, daemon->outpacket.iov_base, save_counter(-1), &to, &from, 0);

	if (option_bool(OPT_LOG_OPTS))
	{
	inet_ntop(AF_INET6, &relay->local, daemon->addrbuff, ADDRSTRLEN);
	inet_ntop(AF_INET6, &relay->server, daemon->namebuff, ADDRSTRLEN);
	my_syslog(MS_DHCP \| LOG_INFO, _("DHCP relay %s -> %s"), daemon->addrbuff, daemon->namebuff);
	}

	/* Save this for replies */
	relay->iface_index = scope_id;
	}
	}
	}

	unsigned short relay_reply6(struct sockaddr_in6 peer, ssize_t sz, char arrival_interface)
	{
	struct dhcp_relay *relay;
	struct in6_addr link;
	unsigned char *inbuff = daemon->dhcp_packet.iov_base;

	/* must have at least msg_type+hopcount+link_address+peer_address+minimal size option
	which is 1 + 1 + 16 + 16 + 2 + 2 = 38 */

	if (sz < 38 \|\| *inbuff != DHCP6RELAYREPL)
	return 0;

	memcpy(&link, &inbuff[2], IN6ADDRSZ);

	for (relay = daemon->relay6; relay; relay = relay->next)
	if (IN6_ARE_ADDR_EQUAL(&link, &relay->local.addr6) &&
	(!relay->interface \|\| wildcard_match(relay->interface, arrival_interface)))
	break;

	reset_counter();

	if (relay)
	{
	void opt, opts = inbuff + 34;
	void *end = inbuff + sz;
	for (opt = opts; opt; opt = opt6_next(opt, end))
	if (opt6_type(opt) == OPTION6_RELAY_MSG && opt6_len(opt) > 0)
	{
	int encap_type = ((unsigned char )opt6_ptr(opt, 0));
	put_opt6(opt6_ptr(opt, 0), opt6_len(opt));
	memcpy(&peer->sin6_addr, &inbuff[18], IN6ADDRSZ);
	peer->sin6_scope_id = relay->iface_index;
	return encap_type == DHCP6RELAYREPL ? DHCPV6_SERVER_PORT : DHCPV6_CLIENT_PORT;
	}
	}

	return 0;
	}

#endif	#endif

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