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First checkin of interface-address constructor mode for DHCPv6 and RA.

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This commit is contained in:
Simon Kelley
2012-12-16 19:46:08 +00:00
parent 4820dce97a
commit 1f776932a1
11 changed files with 478 additions and 338 deletions
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2
src/bpf.c
View File

@@ -147,7 +147,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
addr->s6_addr[3] = 0;
}
if (!((*callback)(addr, prefix, scope_id, iface_index, 0, parm)))
if (!((*callback)(addr, prefix, scope_id, iface_index, 0, 0, 0, parm)))
goto err;
}
#endif

148
src/dhcp-common.c
View File

@@ -333,83 +333,6 @@ void dhcp_update_configs(struct dhcp_config *configs)
}
#ifdef HAVE_DHCP6
static int join_multicast_worker(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
{
char ifrn_name[IFNAMSIZ];
struct ipv6_mreq mreq;
int fd, i, max = *((int *)vparam);
struct iname *tmp;
(void)prefix;
(void)scope;
(void)dad;
/* record which interfaces we join on, so that we do it at most one per
interface, even when they have multiple addresses. Use outpacket
as an array of int, since it's always allocated here and easy
to expand for theoretical vast numbers of interfaces. */
for (i = 0; i < max; i++)
if (if_index == ((int *)daemon->outpacket.iov_base)[i])
return 1;
if ((fd = socket(PF_INET6, SOCK_DGRAM, 0)) == -1)
return 0;
if (!indextoname(fd, if_index, ifrn_name))
{
close(fd);
return 0;
}
close(fd);
/* Are we doing DHCP on this interface? */
if (!iface_check(AF_INET6, (struct all_addr *)local, ifrn_name, NULL))
return 1;
for (tmp = daemon->dhcp_except; tmp; tmp = tmp->next)
if (tmp->name && (strcmp(tmp->name, ifrn_name) == 0))
return 1;
mreq.ipv6mr_interface = if_index;
inet_pton(AF_INET6, ALL_RELAY_AGENTS_AND_SERVERS, &mreq.ipv6mr_multiaddr);
if (daemon->dhcp6 &&
setsockopt(daemon->dhcp6fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) == -1)
return 0;
inet_pton(AF_INET6, ALL_SERVERS, &mreq.ipv6mr_multiaddr);
if (daemon->dhcp6 &&
setsockopt(daemon->dhcp6fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) == -1)
return 0;
inet_pton(AF_INET6, ALL_ROUTERS, &mreq.ipv6mr_multiaddr);
if (daemon->ra_contexts &&
setsockopt(daemon->icmp6fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) == -1)
return 0;
expand_buf(&daemon->outpacket, (max+1) * sizeof(int));
((int *)daemon->outpacket.iov_base)[max++] = if_index;
*((int *)vparam) = max;
return 1;
}
void join_multicast(void)
{
int count = 0;
if (!iface_enumerate(AF_INET6, &count, join_multicast_worker))
die(_("failed to join DHCPv6 multicast group: %s"), NULL, EC_BADNET);
}
#endif
#ifdef HAVE_LINUX_NETWORK
void bindtodevice(int fd)
{
@@ -750,4 +673,75 @@ char *option_string(int prot, unsigned int opt, unsigned char *val, int opt_len,
}
void log_context(int family, struct dhcp_context *context)
{
/* Cannot use dhcp_buff* for RA contexts */
void *start = &context->start;
void *end = &context->end;
#ifdef HAVE_DHCP6
if (family == AF_INET6)
{
struct in6_addr subnet = context->start6;
if (!(context->flags & CONTEXT_TEMPLATE))
setaddr6part(&subnet, 0);
inet_ntop(AF_INET6, &subnet, daemon->addrbuff, ADDRSTRLEN);
start = &context->start6;
end = &context->end6;
}
#endif
if (context->flags & CONTEXT_CONSTRUCTED)
sprintf(daemon->namebuff, "constructed for %s", context->template_interface);
else if (context->flags & CONTEXT_TEMPLATE)
sprintf(daemon->namebuff, "template for %s", context->template_interface);
else
{
if (family != AF_INET && (context->flags & CONTEXT_DEPRECATE))
strcpy(daemon->namebuff, _("prefix deprecated"));
else
{
char *p = daemon->namebuff;
p += sprintf(p, _("lease time "));
prettyprint_time(p, context->lease_time);
}
}
if ((context->flags & CONTEXT_DHCP) || family == AF_INET)
{
inet_ntop(family, start, daemon->dhcp_buff, 256);
inet_ntop(family, end, daemon->dhcp_buff3, 256);
my_syslog(MS_DHCP | LOG_INFO,
(context->flags & CONTEXT_RA_STATELESS) ?
_("%s stateless on %s%.0s%.0s") :
(context->flags & CONTEXT_STATIC) ?
_("%s, static leases only on %.0s%s, %s") :
(context->flags & CONTEXT_PROXY) ?
_("%s, proxy on subnet %.0s%s%.0s") :
_("%s, IP range %s -- %s, %s"),
(family != AF_INET) ? "DHCPv6" : "DHCP",
daemon->dhcp_buff, daemon->dhcp_buff3, daemon->namebuff);
}
if (context->flags & CONTEXT_RA_NAME)
my_syslog(MS_DHCP | LOG_INFO, _("DHCPv4-derived IPv6 names on %s"),
daemon->addrbuff);
if (context->flags & (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS))
{
if (!(context->flags & (CONTEXT_DEPRECATE | CONTEXT_CONSTRUCTED | CONTEXT_TEMPLATE)))
{
char *p = daemon->namebuff;
p += sprintf(p, _("prefix valid "));
prettyprint_time(p, context->lease_time > 7200 ? context->lease_time : 7200);
}
my_syslog(MS_DHCP | LOG_INFO, _("router advertisement on %s %s"),
daemon->addrbuff, daemon->namebuff);
}
}
#endif

214
src/dhcp6.c
View File

@@ -25,7 +25,8 @@ struct iface_param {
};
static int complete_context6(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam);
int scope, int if_index, int dad,
int preferred, int valid, void *vparam);
static int make_duid1(int index, unsigned int type, char *mac, size_t maclen, void *parm);
@@ -181,7 +182,8 @@ void dhcp6_packet(time_t now)
}
static int complete_context6(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
int scope, int if_index, int dad, int preferred,
int valid, void *vparam)
{
struct dhcp_context *context;
struct iface_param *param = vparam;
@@ -189,6 +191,8 @@ static int complete_context6(struct in6_addr *local, int prefix,
(void)scope; /* warning */
(void)dad;
(void)preferred;
(void)valid;
if (if_index == param->ind &&
!IN6_IS_ADDR_LOOPBACK(local) &&
@@ -467,6 +471,212 @@ static int make_duid1(int index, unsigned int type, char *mac, size_t maclen, vo
return 0;
}
struct cparam {
time_t now;
int newone;
};
static int construct_worker(struct in6_addr *local, int prefix,
int scope, int if_index, int dad,
int preferred, int valid, void *vparam)
{
char ifrn_name[IFNAMSIZ];
struct in6_addr start6, end6;
struct dhcp_context *template, *context;
(void)scope;
(void)dad;
struct cparam *param = vparam;
if (IN6_IS_ADDR_LOOPBACK(local) ||
IN6_IS_ADDR_LINKLOCAL(local) ||
IN6_IS_ADDR_MULTICAST(local))
return 1;
if (!indextoname(daemon->doing_dhcp6 ? daemon->dhcp6fd : daemon->icmp6fd, if_index, ifrn_name))
return 0;
for (template = daemon->dhcp6; template; template = template->next)
if (!(template->flags & CONTEXT_TEMPLATE))
{
/* non-template entries, just fill in interface and local addresses */
if (prefix == template->prefix &&
is_same_net6(local, &template->start6, prefix) &&
is_same_net6(local, &template->end6, prefix))
{
template->if_index = if_index;
template->local6 = *local;
}
}
else if (strcmp(ifrn_name, template->template_interface) == 0 &&
addr6part(local) == addr6part(&template->start6))
{
start6 = *local;
setaddr6part(&start6, addr6part(&template->start6));
end6 = *local;
setaddr6part(&end6, addr6part(&template->end6));
for (context = daemon->dhcp6; context; context = context->next)
if ((context->flags & CONTEXT_CONSTRUCTED) &&
IN6_ARE_ADDR_EQUAL(&start6, &context->start6) &&
IN6_ARE_ADDR_EQUAL(&end6, &context->end6))
{
context->flags &= ~CONTEXT_GC;
break;
}
if (!context && (context = whine_malloc(sizeof (struct dhcp_context))))
{
*context = *template;
context->start6 = start6;
context->end6 = end6;
context->flags &= ~CONTEXT_TEMPLATE;
context->flags |= CONTEXT_CONSTRUCTED;
context->if_index = if_index;
context->local6 = *local;
context->lease_time = param->now + valid;
context->next = daemon->dhcp6;
daemon->dhcp6 = context;
ra_start_unsolicted(dnsmasq_time(), context);
/* we created a new one, need to call
lease_update_file to get periodic functions called */
param->newone = 1;
log_context(AF_INET6, context);
}
if (context)
{
if (valid == -1)
context->valid = valid;
else
context->valid = valid + param->now;
if (preferred == -1)
context->preferred = preferred;
else
context->preferred = preferred + param->now;
}
}
return 1;
}
void dhcp_construct_contexts(time_t now)
{
struct dhcp_context *tmp, *context, **up;
struct cparam param;
param.newone = 0;
param.now = now;
for (context = daemon->dhcp6; context; context = context->next)
if (context->flags & CONTEXT_CONSTRUCTED)
context->flags |= CONTEXT_GC;
iface_enumerate(AF_INET6, &param, construct_worker);
for (up = &daemon->dhcp6, context = daemon->dhcp6; context; context = tmp)
{
tmp = context->next;
if (context->flags & CONTEXT_GC)
{
if (daemon->dhcp6 == context)
daemon->dhcp6 = context->next;
*up = context->next;
free(context);
}
else
up = &context->next;
}
if (param.newone)
lease_update_file(now);
}
static int join_multicast_worker(struct in6_addr *local, int prefix,
int scope, int if_index, int dad,
int preferred, int valid, void *vparam)
{
char ifrn_name[IFNAMSIZ];
struct ipv6_mreq mreq;
int fd, i, max = *((int *)vparam);
struct iname *tmp;
(void)prefix;
(void)scope;
(void)dad;
(void)preferred;
(void)valid;
/* record which interfaces we join on, so that we do it at most one per
interface, even when they have multiple addresses. Use outpacket
as an array of int, since it's always allocated here and easy
to expand for theoretical vast numbers of interfaces. */
for (i = 0; i < max; i++)
if (if_index == ((int *)daemon->outpacket.iov_base)[i])
return 1;
if ((fd = socket(PF_INET6, SOCK_DGRAM, 0)) == -1)
return 0;
if (!indextoname(fd, if_index, ifrn_name))
{
close(fd);
return 0;
}
close(fd);
/* Are we doing DHCP on this interface? */
if (!iface_check(AF_INET6, (struct all_addr *)local, ifrn_name, NULL))
return 1;
for (tmp = daemon->dhcp_except; tmp; tmp = tmp->next)
if (tmp->name && (strcmp(tmp->name, ifrn_name) == 0))
return 1;
mreq.ipv6mr_interface = if_index;
inet_pton(AF_INET6, ALL_RELAY_AGENTS_AND_SERVERS, &mreq.ipv6mr_multiaddr);
if (daemon->doing_dhcp6 &&
setsockopt(daemon->dhcp6fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) == -1)
return 0;
inet_pton(AF_INET6, ALL_SERVERS, &mreq.ipv6mr_multiaddr);
if (daemon->doing_dhcp6 &&
setsockopt(daemon->dhcp6fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) == -1)
return 0;
inet_pton(AF_INET6, ALL_ROUTERS, &mreq.ipv6mr_multiaddr);
if (daemon->doing_ra &&
setsockopt(daemon->icmp6fd, IPPROTO_IPV6, IPV6_JOIN_GROUP, &mreq, sizeof(mreq)) == -1)
return 0;
expand_buf(&daemon->outpacket, (max+1) * sizeof(int));
((int *)daemon->outpacket.iov_base)[max++] = if_index;
*((int *)vparam) = max;
return 1;
}
void join_multicast(void)
{
int count = 0;
if (!iface_enumerate(AF_INET6, &count, join_multicast_worker))
die(_("failed to join DHCPv6 multicast group: %s"), NULL, EC_BADNET);
}
#endif

177
src/dnsmasq.c
View File

@@ -51,6 +51,7 @@ int main (int argc, char **argv)
cap_user_header_t hdr = NULL;
cap_user_data_t data = NULL;
#endif
struct dhcp_context *context;
#ifdef LOCALEDIR
setlocale(LC_ALL, "");
@@ -167,40 +168,44 @@ int main (int argc, char **argv)
#ifdef HAVE_DHCP
if (daemon->dhcp || daemon->dhcp6)
{
{
# ifdef HAVE_DHCP6
if (daemon->dhcp6)
{
daemon->doing_ra = option_bool(OPT_RA);
for (context = daemon->dhcp6; context; context = context->next)
{
if (context->flags & CONTEXT_DHCP)
daemon->doing_dhcp6 = 1;
if (context->flags & (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS))
daemon->doing_ra = 1;
}
}
# endif
/* Note that order matters here, we must call lease_init before
creating any file descriptors which shouldn't be leaked
to the lease-script init process. We need to call common_init
before lease_init to allocate buffers it uses.*/
dhcp_common_init();
lease_init(now);
if (daemon->dhcp || daemon->doing_dhcp6)
{
dhcp_common_init();
lease_init(now);
}
if (daemon->dhcp)
dhcp_init();
}
# ifdef HAVE_DHCP6
/* Start RA subsystem if --enable-ra OR dhcp-range=<subnet>, ra-only */
if (daemon->ra_contexts || option_bool(OPT_RA))
{
/* link the DHCP6 contexts to the ra-only ones so we can traverse them all
from ->ra_contexts, but only the non-ra-onlies from ->dhcp6 */
struct dhcp_context *context;
if (daemon->doing_ra)
ra_init(now);
if (!daemon->ra_contexts)
daemon->ra_contexts = daemon->dhcp6;
else
{
for (context = daemon->ra_contexts; context->next; context = context->next);
context->next = daemon->dhcp6;
}
ra_init(now);
}
if (daemon->dhcp6)
dhcp6_init();
if (daemon->doing_dhcp6)
dhcp6_init();
# endif
}
#endif
@@ -214,13 +219,13 @@ int main (int argc, char **argv)
#ifdef HAVE_DHCP6
/* after netlink_init */
if (daemon->ra_contexts || daemon->dhcp6)
if (daemon->doing_dhcp6 || daemon->doing_ra)
join_multicast();
#endif
#ifdef HAVE_DHCP
/* after netlink_init */
if (daemon->dhcp || daemon->dhcp6)
if (daemon->dhcp || daemon->doing_dhcp6)
lease_find_interfaces(now);
#endif
@@ -628,90 +633,24 @@ int main (int argc, char **argv)
if (daemon->max_logs != 0)
my_syslog(LOG_INFO, _("asynchronous logging enabled, queue limit is %d messages"), daemon->max_logs);
if (daemon->ra_contexts)
my_syslog(MS_DHCP | LOG_INFO, _("IPv6 router advertisement enabled"));
#ifdef HAVE_DHCP
if (daemon->dhcp || daemon->dhcp6 || daemon->ra_contexts)
{
struct dhcp_context *dhcp_tmp;
int family = AF_INET;
dhcp_tmp = daemon->dhcp;
#ifdef HAVE_DHCP6
again:
#endif
for (; dhcp_tmp; dhcp_tmp = dhcp_tmp->next)
{
void *start = &dhcp_tmp->start;
void *end = &dhcp_tmp->end;
#ifdef HAVE_DHCP6
if (family == AF_INET6)
{
start = &dhcp_tmp->start6;
end = &dhcp_tmp->end6;
struct in6_addr subnet = dhcp_tmp->start6;
setaddr6part(&subnet, 0);
inet_ntop(AF_INET6, &subnet, daemon->dhcp_buff2, 256);
}
#endif
if (family != AF_INET && (dhcp_tmp->flags & CONTEXT_DEPRECATE))
strcpy(daemon->namebuff, _("prefix deprecated"));
else
{
char *p = daemon->namebuff;
p += sprintf(p, _("lease time "));
prettyprint_time(p, dhcp_tmp->lease_time);
}
inet_ntop(family, start, daemon->dhcp_buff, 256);
inet_ntop(family, end, daemon->dhcp_buff3, 256);
if ((dhcp_tmp->flags & CONTEXT_DHCP) || family == AF_INET)
my_syslog(MS_DHCP | LOG_INFO,
(dhcp_tmp->flags & CONTEXT_RA_STATELESS) ?
_("%s stateless on %s%.0s%.0s") :
(dhcp_tmp->flags & CONTEXT_STATIC) ?
_("%s, static leases only on %.0s%s, %s") :
(dhcp_tmp->flags & CONTEXT_PROXY) ?
_("%s, proxy on subnet %.0s%s%.0s") :
_("%s, IP range %s -- %s, %s"),
(family != AF_INET) ? "DHCPv6" : "DHCP",
daemon->dhcp_buff, daemon->dhcp_buff3, daemon->namebuff);
for (context = daemon->dhcp; context; context = context->next)
log_context(AF_INET, context);
if (dhcp_tmp->flags & CONTEXT_RA_NAME)
my_syslog(MS_DHCP | LOG_INFO, _("DHCPv4-derived IPv6 names on %s"),
daemon->dhcp_buff2);
if (dhcp_tmp->flags & (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS))
{
if (!(dhcp_tmp->flags & CONTEXT_DEPRECATE))
{
char *p = daemon->namebuff;
p += sprintf(p, _("prefix valid "));
prettyprint_time(p, dhcp_tmp->lease_time > 7200 ? dhcp_tmp->lease_time : 7200);
}
my_syslog(MS_DHCP | LOG_INFO, _("SLAAC on %s %s"),
daemon->dhcp_buff2, daemon->namebuff);
}
}
#ifdef HAVE_DHCP6
if (family == AF_INET)
{
family = AF_INET6;
if (daemon->ra_contexts)
dhcp_tmp = daemon->ra_contexts;
else
dhcp_tmp = daemon->dhcp6;
goto again;
}
#endif
# ifdef HAVE_DHCP6
for (context = daemon->dhcp6; context; context = context->next)
log_context(AF_INET6, context);
}
#endif
if (daemon->doing_dhcp6 || daemon->doing_ra)
dhcp_construct_contexts(now);
if (option_bool(OPT_RA))
my_syslog(MS_DHCP | LOG_INFO, _("IPv6 router advertisement enabled"));
# endif
#endif
#ifdef HAVE_TFTP
if (option_bool(OPT_TFTP))
@@ -818,13 +757,13 @@ int main (int argc, char **argv)
#endif
#ifdef HAVE_DHCP6
if (daemon->dhcp6)
if (daemon->doing_dhcp6)
{
FD_SET(daemon->dhcp6fd, &rset);
bump_maxfd(daemon->dhcp6fd, &maxfd);
}
if (daemon->ra_contexts)
if (daemon->doing_ra)
{
FD_SET(daemon->icmp6fd, &rset);
bump_maxfd(daemon->icmp6fd, &maxfd);
@@ -888,7 +827,7 @@ int main (int argc, char **argv)
#ifdef HAVE_LINUX_NETWORK
if (FD_ISSET(daemon->netlinkfd, &rset))
netlink_multicast();
netlink_multicast(now);
#endif
/* Check for changes to resolv files once per second max. */
@@ -936,11 +875,11 @@ int main (int argc, char **argv)
}
#ifdef HAVE_DHCP6
if (daemon->dhcp6 && FD_ISSET(daemon->dhcp6fd, &rset))
if (daemon->doing_dhcp6 && FD_ISSET(daemon->dhcp6fd, &rset))
dhcp6_packet(now);
if (daemon->ra_contexts && FD_ISSET(daemon->icmp6fd, &rset))
icmp6_packet();
if (daemon->doing_ra && FD_ISSET(daemon->icmp6fd, &rset))
icmp6_packet(now);
#endif
# ifdef HAVE_SCRIPT
@@ -1120,13 +1059,13 @@ static void async_event(int pipe, time_t now)
case EVENT_ALARM:
#ifdef HAVE_DHCP
if (daemon->dhcp || daemon->dhcp6)
if (daemon->dhcp || daemon->doing_dhcp6)
{
lease_prune(NULL, now);
lease_update_file(now);
}
#ifdef HAVE_DHCP6
else if (daemon->ra_contexts)
else if (daemon->doing_ra)
/* Not doing DHCP, so no lease system, manage alarms for ra only */
send_alarm(periodic_ra(now), now);
#endif
@@ -1283,7 +1222,7 @@ void clear_cache_and_reload(time_t now)
cache_reload();
#ifdef HAVE_DHCP
if (daemon->dhcp || daemon->dhcp6)
if (daemon->dhcp || daemon->doing_dhcp6)
{
if (option_bool(OPT_ETHERS))
dhcp_read_ethers();
@@ -1294,7 +1233,7 @@ void clear_cache_and_reload(time_t now)
lease_update_dns(1);
}
#ifdef HAVE_DHCP6
else if (daemon->ra_contexts)
else if (daemon->doing_ra)
/* Not doing DHCP, so no lease system, manage
alarms for ra only */
send_alarm(periodic_ra(now), now);
@@ -1597,7 +1536,7 @@ int icmp_ping(struct in_addr addr)
set_log_writer(&wset, &maxfd);
#ifdef HAVE_DHCP6
if (daemon->ra_contexts)
if (daemon->doing_ra)
{
FD_SET(daemon->icmp6fd, &rset);
bump_maxfd(daemon->icmp6fd, &maxfd);
@@ -1616,8 +1555,8 @@ int icmp_ping(struct in_addr addr)
check_dns_listeners(&rset, now);
#ifdef HAVE_DHCP6
if (daemon->ra_contexts && FD_ISSET(daemon->icmp6fd, &rset))
icmp6_packet();
if (daemon->doing_ra && FD_ISSET(daemon->icmp6fd, &rset))
icmp6_packet(now);
#endif
#ifdef HAVE_TFTP

22
src/dnsmasq.h
View File

@@ -667,7 +667,7 @@ struct cond_domain {
#endif
int is6;
struct cond_domain *next;
};
};
struct dhcp_context {
unsigned int lease_time, addr_epoch;
@@ -679,6 +679,8 @@ struct dhcp_context {
struct in6_addr local6;
int prefix, if_index;
time_t ra_time;
char *template_interface;
int valid, preferred; /* times from address for constructed contexts */
#endif
int flags;
struct dhcp_netid netid, *filter;
@@ -695,6 +697,11 @@ struct dhcp_context {
#define CONTEXT_RA_STATELESS 128
#define CONTEXT_DHCP 256
#define CONTEXT_DEPRECATE 512
#define CONTEXT_TEMPLATE 1024 /* create contexts using addresses */
#define CONTEXT_CONSTRUCTED 2048
#define CONTEXT_GC 4096
#define CONTEXT_RA 8192
struct ping_result {
struct in_addr addr;
@@ -773,7 +780,7 @@ extern struct daemon {
int port, query_port, min_port;
unsigned long local_ttl, neg_ttl, max_ttl, max_cache_ttl, auth_ttl;
struct hostsfile *addn_hosts;
struct dhcp_context *dhcp, *dhcp6, *ra_contexts;
struct dhcp_context *dhcp, *dhcp6;
struct dhcp_config *dhcp_conf;
struct dhcp_opt *dhcp_opts, *dhcp_match, *dhcp_opts6, *dhcp_match6;
struct dhcp_vendor *dhcp_vendors;
@@ -784,6 +791,7 @@ extern struct daemon {
struct addr_list *override_relays;
int override;
int enable_pxe;
int doing_ra, doing_dhcp6;
struct dhcp_netid_list *dhcp_ignore, *dhcp_ignore_names, *dhcp_gen_names;
struct dhcp_netid_list *force_broadcast, *bootp_dynamic;
struct hostsfile *dhcp_hosts_file, *dhcp_opts_file;
@@ -1074,7 +1082,7 @@ void poll_resolv(int force, int do_reload, time_t now);
/* netlink.c */
#ifdef HAVE_LINUX_NETWORK
void netlink_init(void);
void netlink_multicast(void);
void netlink_multicast(time_t now);
#endif
/* bpf.c */
@@ -1142,6 +1150,8 @@ struct dhcp_config *find_config6(struct dhcp_config *configs,
struct dhcp_config *config_find_by_address6(struct dhcp_config *configs, struct in6_addr *net,
int prefix, u64 addr);
void make_duid(time_t now);
void dhcp_construct_contexts(time_t now);
void join_multicast(void);
#endif
/* rfc3315.c */
@@ -1172,8 +1182,8 @@ void bindtodevice(int fd);
#endif
# ifdef HAVE_DHCP6
void display_opts6(void);
void join_multicast(void);
# endif
void log_context(int family, struct dhcp_context *context);
#endif
/* outpacket.c */
@@ -1192,16 +1202,14 @@ void put_opt6_string(char *s);
/* radv.c */
#ifdef HAVE_DHCP6
void ra_init(time_t now);
void icmp6_packet(void);
void icmp6_packet(time_t now);
time_t periodic_ra(time_t now);
void ra_start_unsolicted(time_t now, struct dhcp_context *context);
#endif
/* slaac.c */
#ifdef HAVE_DHCP6
void build_subnet_map(void);
void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force);
time_t periodic_slaac(time_t now, struct dhcp_lease *leases);
void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *interface, struct dhcp_lease *leases);
void schedule_subnet_map(void);
#endif

11
src/lease.c
View File

@@ -308,7 +308,7 @@ void lease_update_file(time_t now)
#ifdef HAVE_DHCP6
/* do timed RAs and determine when the next is, also pings to potential SLAAC addresses */
if (daemon->ra_contexts)
if (daemon->doing_ra)
{
time_t event;
@@ -363,12 +363,15 @@ static int find_interface_v4(struct in_addr local, int if_index,
#ifdef HAVE_DHCP6
static int find_interface_v6(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
int scope, int if_index, int dad,
int preferred, int valid, void *vparam)
{
struct dhcp_lease *lease;
(void)scope;
(void)dad;
(void)preferred;
(void)valid;
for (lease = leases; lease; lease = lease->next)
if ((lease->flags & (LEASE_TA | LEASE_NA)))
@@ -395,10 +398,6 @@ void lease_ping_reply(struct in6_addr *sender, unsigned char *packet, char *inte
start-time. */
void lease_find_interfaces(time_t now)
{
#ifdef HAVE_DHCP6
build_subnet_map();
#endif
iface_enumerate(AF_INET, &now, find_interface_v4);
#ifdef HAVE_DHCP6
iface_enumerate(AF_INET6, &now, find_interface_v6);

63
src/netlink.c
View File

@@ -50,10 +50,14 @@ void netlink_init(void)
addr.nl_pid = 0; /* autobind */
addr.nl_groups = RTMGRP_IPV4_ROUTE;
if (option_bool(OPT_CLEVERBIND))
addr.nl_groups |= RTMGRP_IPV4_IFADDR;
addr.nl_groups |= RTMGRP_IPV4_IFADDR;
#ifdef HAVE_IPV6
addr.nl_groups |= RTMGRP_IPV6_ROUTE;
if (daemon->ra_contexts || option_bool(OPT_CLEVERBIND))
if (option_bool(OPT_CLEVERBIND))
addr.nl_groups |= RTMGRP_IPV6_IFADDR;
#endif
#ifdef HAVE_DHCP6
if (daemon->doing_ra || daemon->doing_dhcp6)
addr.nl_groups |= RTMGRP_IPV6_IFADDR;
#endif
@@ -187,7 +191,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
if (h->nlmsg_seq != seq || h->nlmsg_pid != netlink_pid || h->nlmsg_type == NLMSG_ERROR)
{
/* May be multicast arriving async */
if (nl_async(h) && option_bool(OPT_CLEVERBIND))
if (nl_async(h))
newaddr = 1;
}
else if (h->nlmsg_type == NLMSG_DONE)
@@ -196,10 +200,15 @@ int iface_enumerate(int family, void *parm, int (*callback)())
after we complete as we're not re-entrant */
if (newaddr)
{
enumerate_interfaces();
create_bound_listeners(0);
if (option_bool(OPT_CLEVERBIND))
{
enumerate_interfaces();
create_bound_listeners(0);
}
#ifdef HAVE_DHCP6
dhcp_construct_contexts(dnsmasq_time());
#endif
}
return callback_ok;
}
else if (h->nlmsg_type == RTM_NEWADDR && family != AF_UNSPEC && family != AF_LOCAL)
@@ -236,17 +245,24 @@ int iface_enumerate(int family, void *parm, int (*callback)())
else if (ifa->ifa_family == AF_INET6)
{
struct in6_addr *addrp = NULL;
u32 valid = 0, preferred = 0;
while (RTA_OK(rta, len1))
{
if (rta->rta_type == IFA_ADDRESS)
addrp = ((struct in6_addr *)(rta+1));
else if (rta->rta_type == IFA_CACHEINFO)
{
struct ifa_cacheinfo *ifc = (struct ifa_cacheinfo *)(rta+1);
preferred = ifc->ifa_prefered;
valid = ifc->ifa_valid;
}
rta = RTA_NEXT(rta, len1);
}
if (addrp && callback_ok)
if (!((*callback)(addrp, (int)(ifa->ifa_prefixlen), (int)(ifa->ifa_scope),
(int)(ifa->ifa_index), (int)(ifa->ifa_flags & IFA_F_TENTATIVE), parm)))
(int)(ifa->ifa_index), (int)(ifa->ifa_flags & IFA_F_TENTATIVE),
(int) preferred, (int)valid, parm)))
callback_ok = 0;
}
#endif
@@ -305,7 +321,7 @@ int iface_enumerate(int family, void *parm, int (*callback)())
}
}
void netlink_multicast(void)
void netlink_multicast(time_t now)
{
ssize_t len;
struct nlmsghdr *h;
@@ -318,7 +334,7 @@ void netlink_multicast(void)
if ((len = netlink_recv()) != -1)
for (h = (struct nlmsghdr *)iov.iov_base; NLMSG_OK(h, (size_t)len); h = NLMSG_NEXT(h, len))
if (nl_async(h) && option_bool(OPT_CLEVERBIND))
if (nl_async(h))
newaddr = 1;
/* restore non-blocking status */
@@ -326,8 +342,14 @@ void netlink_multicast(void)
if (newaddr)
{
enumerate_interfaces();
create_bound_listeners(0);
if (option_bool(OPT_CLEVERBIND))
{
enumerate_interfaces();
create_bound_listeners(0);
}
#ifdef HAVE_DHCP6
dhcp_construct_contexts(now);
#endif
}
}
@@ -371,21 +393,8 @@ static int nl_async(struct nlmsghdr *h)
}
return 0;
}
else if (h->nlmsg_type == RTM_NEWADDR)
{
#ifdef HAVE_DHCP6
/* force RAs to sync new network and pick up new interfaces. */
if (daemon->ra_contexts)
{
schedule_subnet_map();
ra_start_unsolicted(dnsmasq_time(), NULL);
/* cause lease_update_file to run after we return, in case we were called from
iface_enumerate and can't re-enter it now */
send_alarm(0, 0);
}
#endif
return 1; /* clever bind mode - rescan */
}
else if (h->nlmsg_type == RTM_NEWADDR || h->nlmsg_type == RTM_DELADDR)
return 1; /* clever bind mode - rescan */
return 0;
}

5
src/network.c
View File

@@ -289,7 +289,8 @@ static int iface_allowed(struct irec **irecp, int if_index,
#ifdef HAVE_IPV6
static int iface_allowed_v6(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
int scope, int if_index, int dad,
int preferred, int valid, void *vparam)
{
union mysockaddr addr;
struct in_addr netmask; /* dummy */
@@ -297,6 +298,8 @@ static int iface_allowed_v6(struct in6_addr *local, int prefix,
(void)prefix; /* warning */
(void)scope; /* warning */
(void)preferred;
(void)valid;
memset(&addr, 0, sizeof(addr));
#ifdef HAVE_SOCKADDR_SA_LEN

41
src/option.c
View File

@@ -2180,7 +2180,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
case 'F': /* --dhcp-range */
{
int k, leasepos = 2;
char *cp, *a[7] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL };
char *cp, *a[8] = { NULL, NULL, NULL, NULL, NULL, NULL, NULL };
struct dhcp_context *new = opt_malloc(sizeof(struct dhcp_context));
memset (new, 0, sizeof(*new));
@@ -2227,7 +2227,7 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
}
}
for (k = 1; k < 7; k++)
for (k = 1; k < 8; k++)
if (!(a[k] = split(a[k-1])))
break;
@@ -2284,28 +2284,25 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
if (strcmp(a[leasepos], "static") == 0)
new->flags |= CONTEXT_STATIC | CONTEXT_DHCP;
else if (strcmp(a[leasepos], "ra-only") == 0 || strcmp(a[leasepos], "slaac") == 0 )
new->flags |= CONTEXT_RA_ONLY;
new->flags |= CONTEXT_RA_ONLY | CONTEXT_RA;
else if (strcmp(a[leasepos], "ra-names") == 0)
new->flags |= CONTEXT_RA_NAME;
new->flags |= CONTEXT_RA_NAME | CONTEXT_RA;
else if (strcmp(a[leasepos], "ra-stateless") == 0)
new->flags |= CONTEXT_RA_STATELESS | CONTEXT_DHCP;
new->flags |= CONTEXT_RA_STATELESS | CONTEXT_DHCP | CONTEXT_RA;
else if (leasepos == 1 && inet_pton(AF_INET6, a[leasepos], &new->end6))
new->flags |= CONTEXT_DHCP;
else if (strstr(a[leasepos], "constructor:") == a[leasepos])
{
new->template_interface = opt_string_alloc(a[leasepos] + 12);
new->flags |= CONTEXT_TEMPLATE;
}
else
break;
}
if (new->flags & CONTEXT_DHCP)
{
new->next = daemon->dhcp6;
daemon->dhcp6 = new;
}
else
{
new->next = daemon->ra_contexts;
daemon->ra_contexts = new;
}
new->next = daemon->dhcp6;
daemon->dhcp6 = new;
/* bare integer < 128 is prefix value */
if (leasepos < k)
{
@@ -2317,10 +2314,14 @@ static int one_opt(int option, char *arg, char *errstr, char *gen_err, int comma
{
new->prefix = pref;
leasepos++;
if ((new->flags & (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS)) &&
new->prefix != 64)
ret_err(_("prefix must be exactly 64 for RA subnets"));
else if (new->prefix < 64)
if (new->prefix != 64)
{
if ((new->flags & (CONTEXT_RA_ONLY | CONTEXT_RA_NAME | CONTEXT_RA_STATELESS)))
ret_err(_("prefix must be exactly 64 for RA subnets"));
else if (new->template_interface)
ret_err(_("prefix must be exactly 64 for subnet constructors"));
}
if (new->prefix < 64)
ret_err(_("prefix must be at least 64"));
}
}

75
src/radv.c
View File

@@ -27,6 +27,7 @@
#include <netinet/icmp6.h>
struct ra_param {
time_t now;
int ind, managed, other, found_context, first;
char *if_name;
struct dhcp_netid *tags;
@@ -37,11 +38,13 @@ struct search_param {
time_t now; int iface;
};
static void send_ra(int iface, char *iface_name, struct in6_addr *dest);
static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest);
static int add_prefixes(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam);
int scope, int if_index, int dad,
int preferred, int valid, void *vparam);
static int iface_search(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam);
int scope, int if_index, int dad,
int prefered, int valid, void *vparam);
static int add_lla(int index, unsigned int type, char *mac, size_t maclen, void *parm);
static int hop_limit;
@@ -62,7 +65,7 @@ void ra_init(time_t now)
expand_buf(&daemon->outpacket, sizeof(struct dhcp_packet));
/* See if we're guessing SLAAC addresses, if so we need to recieve ping replies */
for (context = daemon->ra_contexts; context; context = context->next)
for (context = daemon->dhcp6; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME))
break;
@@ -98,14 +101,17 @@ void ra_start_unsolicted(time_t now, struct dhcp_context *context)
if (context)
context->ra_time = now;
else
for (context = daemon->ra_contexts; context; context = context->next)
context->ra_time = now + (rand16()/13000); /* range 0 - 5 */
for (context = daemon->dhcp6; context; context = context->next)
if (context->flags & CONTEXT_RA)
context->ra_time = now + (rand16()/13000); /* range 0 - 5 */
else
context->ra_time = 0;
/* re-do frequently for a minute or so, in case the first gets lost. */
ra_short_period_start = now;
}
void icmp6_packet(void)
void icmp6_packet(time_t now)
{
char interface[IF_NAMESIZE+1];
ssize_t sz;
@@ -174,11 +180,11 @@ void icmp6_packet(void)
my_syslog(MS_DHCP | LOG_INFO, "RTR-SOLICIT(%s) %s", interface, mac);
/* source address may not be valid in solicit request. */
send_ra(if_index, interface, !IN6_IS_ADDR_UNSPECIFIED(&from.sin6_addr) ? &from.sin6_addr : NULL);
send_ra(now, if_index, interface, !IN6_IS_ADDR_UNSPECIFIED(&from.sin6_addr) ? &from.sin6_addr : NULL);
}
}
static void send_ra(int iface, char *iface_name, struct in6_addr *dest)
static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *dest)
{
struct ra_packet *ra;
struct ra_param parm;
@@ -206,13 +212,14 @@ static void send_ra(int iface, char *iface_name, struct in6_addr *dest)
parm.found_context = 0;
parm.if_name = iface_name;
parm.first = 1;
parm.now = now;
/* set tag with name == interface */
iface_id.net = iface_name;
iface_id.next = NULL;
parm.tags = &iface_id;
for (context = daemon->ra_contexts; context; context = context->next)
for (context = daemon->dhcp6; context; context = context->next)
{
context->flags &= ~CONTEXT_RA_DONE;
context->netid.next = &context->netid;
@@ -320,28 +327,32 @@ static void send_ra(int iface, char *iface_name, struct in6_addr *dest)
}
static int add_prefixes(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
int scope, int if_index, int dad,
int preferred, int valid, void *vparam)
{
struct ra_param *param = vparam;
(void)scope; /* warning */
(void)dad;
(void)preferred;
(void)valid;
if (if_index == param->ind)
{
if (IN6_IS_ADDR_LINKLOCAL(local))
param->link_local = *local;
else if (!IN6_IS_ADDR_LOOPBACK(local) &&
!IN6_IS_ADDR_LINKLOCAL(local) &&
!IN6_IS_ADDR_MULTICAST(local))
{
int do_prefix = 0;
int do_slaac = 0;
int deprecate = 0;
int found_constructed = 0;
unsigned int time = 0xffffffff;
int calc_valid = 0, calc_preferred = 0;
struct dhcp_context *context;
for (context = daemon->ra_contexts; context; context = context->next)
for (context = daemon->dhcp6; context; context = context->next)
if (prefix == context->prefix &&
is_same_net6(local, &context->start6, prefix) &&
is_same_net6(local, &context->end6, prefix))
@@ -365,7 +376,18 @@ static int add_prefixes(struct in6_addr *local, int prefix,
param->managed = 1;
param->other = 1;
}
if (context->flags & CONTEXT_CONSTRUCTED)
{
found_constructed = 1;
calc_valid = context->valid;
calc_preferred = context->preferred;
if (context->valid != -1)
calc_valid -= (int)param->now;
if (context->preferred != -1)
calc_preferred -= (int)param->now;
}
/* find floor time */
if (time > context->lease_time)
time = context->lease_time;
@@ -395,6 +417,12 @@ static int add_prefixes(struct in6_addr *local, int prefix,
param->first = 0;
param->found_context = 1;
}
if (!found_constructed)
{
calc_valid = time;
calc_preferred = deprecate ? 0 : time;
}
if (do_prefix)
{
@@ -414,8 +442,8 @@ static int add_prefixes(struct in6_addr *local, int prefix,
opt->prefix_len = prefix;
/* autonomous only if we're not doing dhcp, always set "on-link" */
opt->flags = do_slaac ? 0xC0 : 0x80;
opt->valid_lifetime = htonl(time);
opt->preferred_lifetime = htonl(deprecate ? 0 : time);
opt->valid_lifetime = htonl(calc_valid);
opt->preferred_lifetime = htonl(calc_preferred);
opt->reserved = 0;
opt->prefix = *local;
@@ -462,7 +490,7 @@ time_t periodic_ra(time_t now)
while (1)
{
/* find overdue events, and time of first future event */
for (next_event = 0, context = daemon->ra_contexts; context; context = context->next)
for (next_event = 0, context = daemon->dhcp6; context; context = context->next)
if (context->ra_time != 0)
{
if (difftime(context->ra_time, now) <= 0.0)
@@ -492,22 +520,25 @@ time_t periodic_ra(time_t now)
if (tmp->name && (strcmp(tmp->name, interface) == 0))
break;
if (!tmp)
send_ra(param.iface, interface, NULL);
send_ra(now, param.iface, interface, NULL);
}
}
return next_event;
}
static int iface_search(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
int scope, int if_index, int dad,
int preferred, int valid, void *vparam)
{
struct search_param *param = vparam;
struct dhcp_context *context;
(void)scope;
(void)dad;
(void)preferred;
(void)valid;
for (context = daemon->ra_contexts; context; context = context->next)
for (context = daemon->dhcp6; context; context = context->next)
if (prefix == context->prefix &&
is_same_net6(local, &context->start6, prefix) &&
is_same_net6(local, &context->end6, prefix))

58
src/slaac.c
View File

@@ -20,7 +20,6 @@
#include <netinet/icmp6.h>
static int map_rebuild = 0;
static int ping_id = 0;
void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force)
@@ -38,7 +37,7 @@ void slaac_add_addrs(struct dhcp_lease *lease, time_t now, int force)
old = lease->slaac_address;
lease->slaac_address = NULL;
for (context = daemon->ra_contexts; context; context = context->next)
for (context = daemon->dhcp6; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME) && lease->last_interface == context->if_index)
{
struct in6_addr addr = context->start6;
@@ -123,7 +122,7 @@ time_t periodic_slaac(time_t now, struct dhcp_lease *leases)
struct slaac_address *slaac;
time_t next_event = 0;
for (context = daemon->ra_contexts; context; context = context->next)
for (context = daemon->dhcp6; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME))
break;
@@ -134,12 +133,6 @@ time_t periodic_slaac(time_t now, struct dhcp_lease *leases)
while (ping_id == 0)
ping_id = rand16();
if (map_rebuild)
{
map_rebuild = 0;
build_subnet_map();
}
for (lease = leases; lease; lease = lease->next)
for (slaac = lease->slaac_address; slaac; slaac = slaac->next)
{
@@ -211,51 +204,4 @@ void slaac_ping_reply(struct in6_addr *sender, unsigned char *packet, char *inte
lease_update_dns(gotone);
}
/* Build a map from ra-names subnets to corresponding interfaces. This
is used to go from DHCPv4 leases to SLAAC addresses,
interface->IPv6-subnet, IPv6-subnet + MAC address -> SLAAC.
*/
static int add_subnet(struct in6_addr *local, int prefix,
int scope, int if_index, int dad, void *vparam)
{
struct dhcp_context *context;
(void)scope;
(void)dad;
(void)vparam;
for (context = daemon->ra_contexts; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME) &&
prefix == context->prefix &&
is_same_net6(local, &context->start6, prefix) &&
is_same_net6(local, &context->end6, prefix))
{
context->if_index = if_index;
context->local6 = *local;
}
return 1;
}
void build_subnet_map(void)
{
struct dhcp_context *context;
int ok = 0;
for (context = daemon->ra_contexts; context; context = context->next)
{
context->if_index = 0;
if ((context->flags & CONTEXT_RA_NAME))
ok = 1;
}
/* ra-names configured */
if (ok)
iface_enumerate(AF_INET6, NULL, add_subnet);
}
void schedule_subnet_map(void)
{
map_rebuild = 1;
}
#endif