Pi-Hole/dnsmasq
1
0
Fork 0
mirror of https://github.com/pi-hole/dnsmasq.git synced 2025-12-19 18:28:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

Remove experimental DHCPv6 prefix-class support.

Browse Source 
The standard for this never made it beyond an internet-draft which expired
in 2012, so it can be considered dead, I think.
This commit is contained in:
Simon Kelley
2020-01-07 22:04:07 +00:00
parent c7a44c4690
commit 6c1e9ac14b
4 changed files with 1 additions and 193 deletions
Download Patch File Download Diff File Expand all files Collapse all files

152
src/rfc3315.c
View File

@@ -31,9 +31,6 @@ struct state {
struct dhcp_netid *tags, *context_tags;
unsigned char mac[DHCP_CHADDR_MAX];
unsigned int mac_len, mac_type;
#ifdef OPTION6_PREFIX_CLASS
struct prefix_class *send_prefix_class;
#endif
};
static int dhcp6_maybe_relay(struct state *state, void *inbuff, size_t sz,
@@ -49,9 +46,6 @@ static void get_context_tag(struct state *state, struct dhcp_context *context);
static int check_ia(struct state *state, void *opt, void **endp, void **ia_option);
static int build_ia(struct state *state, int *t1cntr);
static void end_ia(int t1cntr, unsigned int min_time, int do_fuzz);
#ifdef OPTION6_PREFIX_CLASS
static struct prefix_class *prefix_class_from_context(struct dhcp_context *context);
#endif
static void mark_context_used(struct state *state, 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);
@@ -276,10 +270,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
struct dhcp_context *context_tmp;
struct dhcp_mac *mac_opt;
unsigned int ignore = 0;
#ifdef OPTION6_PREFIX_CLASS
struct prefix_class *p;
int dump_all_prefix_classes = 0;
#endif
state->packet_options = inbuff + 4;
state->end = inbuff + sz;
@@ -293,9 +283,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
state->hostname = NULL;
state->client_hostname = NULL;
state->fqdn_flags = 0x01; /* default to send if we receive no FQDN option */
#ifdef OPTION6_PREFIX_CLASS
state->send_prefix_class = NULL;
#endif
/* set tag with name == interface */
iface_id.net = state->iface_name;
@@ -590,31 +577,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
state->tags = &known_id;
}
#ifdef OPTION6_PREFIX_CLASS
/* OPTION_PREFIX_CLASS in ORO, send addresses in all prefix classes */
if (daemon->prefix_classes && (msg_type == DHCP6SOLICIT || msg_type == DHCP6REQUEST))
{
void *oro;
if ((oro = opt6_find(state->packet_options, state->end, OPTION6_ORO, 0)))
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);
/* if all the netids in the ignore list are present, ignore this client */
@@ -698,60 +660,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
for (c = state->context; c; c = c->current)
c->flags &= ~CONTEXT_USED;
#ifdef OPTION6_PREFIX_CLASS
if (daemon->prefix_classes && state->ia_type == OPTION6_IA_NA)
{
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);
if (address_assigned)
address_assigned = 2;
@@ -780,10 +688,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
continue; /* address leased elsewhere */
/* add address to output packet */
#ifdef OPTION6_PREFIX_CLASS
if (dump_all_prefix_classes && state->ia_type == OPTION6_IA_NA)
state->send_prefix_class = prefix_class_from_context(c);
#endif
add_address(state, c, lease_time, ia_option, &min_time, &req_addr, now);
mark_context_used(state, &req_addr);
get_context_tag(state, c);
@@ -803,11 +707,8 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
lease_time = config->lease_time;
else
lease_time = c->lease_time;
/* add address to output packet */
#ifdef OPTION6_PREFIX_CLASS
if (dump_all_prefix_classes && state->ia_type == OPTION6_IA_NA)
state->send_prefix_class = prefix_class_from_context(c);
#endif
add_address(state, c, lease_time, NULL, &min_time, &addr, now);
mark_context_used(state, &addr);
get_context_tag(state, c);
@@ -821,10 +722,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
req_addr = ltmp->addr6;
if ((c = address6_available(state->context, &req_addr, solicit_tags, plain_range)))
{
#ifdef OPTION6_PREFIX_CLASS
if (dump_all_prefix_classes && state->ia_type == OPTION6_IA_NA)
state->send_prefix_class = prefix_class_from_context(c);
#endif
add_address(state, c, c->lease_time, NULL, &min_time, &req_addr, now);
mark_context_used(state, &req_addr);
get_context_tag(state, c);
@@ -836,10 +733,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
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
if (dump_all_prefix_classes && state->ia_type == OPTION6_IA_NA)
state->send_prefix_class = prefix_class_from_context(c);
#endif
add_address(state, c, c->lease_time, NULL, &min_time, &addr, now);
mark_context_used(state, &addr);
get_context_tag(state, c);
@@ -982,10 +875,6 @@ static int dhcp6_no_relay(struct state *state, int msg_type, void *inbuff, size_
if (config_ok && have_config(config, CONFIG_TIME))
lease_time = config->lease_time;
#ifdef OPTION6_PREFIX_CLASS
if (dump_all_prefix_classes && state->ia_type == OPTION6_IA_NA)
state->send_prefix_class = prefix_class_from_context(c);
#endif
add_address(state, dynamic, lease_time, ia_option, &min_time, &req_addr, now);
get_context_tag(state, dynamic);
address_assigned = 1;
@@ -1630,21 +1519,6 @@ static void get_context_tag(struct state *state, struct dhcp_context *context)
}
}
#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)
{
state->ia_type = opt6_type(opt);
@@ -1729,16 +1603,6 @@ static void add_address(struct state *state, struct dhcp_context *context, unsig
put_opt6(addr, sizeof(*addr));
put_opt6_long(preferred_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);
if (state->lease_allocate)
@@ -1774,16 +1638,9 @@ 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. */
#ifdef OPTION6_PREFIX_CLASS
for (context = state->context; 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
for (context = state->context; context; context = context->current)
if (is_same_net6(addr, &context->start6, context->prefix))
context->flags |= CONTEXT_USED;
#endif
}
static void mark_config_used(struct dhcp_context *context, struct in6_addr *addr)
@@ -2010,13 +1867,6 @@ static void log6_opts(int nest, unsigned int xid, void *start_opts, void *end_op
optname = "iaaddr";
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)
{
int len = sprintf(daemon->namebuff, "%u ", opt6_uint(opt, 0, 2));