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RFC4191 route information option.

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This commit is contained in:
Ilya Ponetaev
2014-09-09 12:46:21 +01:00
committed by Simon Kelley
parent c43b8a6326
commit 5bf50af2d0
3 changed files with 44 additions and 12 deletions
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4
CHANGELOG
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@@ -27,6 +27,10 @@ version 2.72
servers which loop back are disabled and this event is logged.
Thanks to Smoothwall for their sponsorship of this feature.
Include an RFC4191 route information option in router
advertisements for the prefix we're advertising. Thanks to
Ilya Ponetaev for the patch.
version 2.71
Subtle change to error handling to help DNSSEC validation

1
src/radv-protocol.h
View File

@@ -50,6 +50,7 @@ struct prefix_opt {
#define ICMP6_OPT_PREFIX 3
#define ICMP6_OPT_MTU 5
#define ICMP6_OPT_ADV_INTERVAL 7
#define ICMP6_OPT_RT_INFO 24
#define ICMP6_OPT_RDNSS 25
#define ICMP6_OPT_DNSSL 31

51
src/radv.c
View File

@@ -32,7 +32,7 @@ struct ra_param {
char *if_name;
struct dhcp_netid *tags;
struct in6_addr link_local, link_global, ula;
unsigned int glob_pref_time, link_pref_time, ula_pref_time, adv_interval;
unsigned int glob_pref_time, link_pref_time, ula_pref_time, adv_interval, prio;
};
struct search_param {
@@ -210,18 +210,7 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
#ifdef HAVE_LINUX_NETWORK
FILE *f;
#endif
save_counter(0);
ra = expand(sizeof(struct ra_packet));
ra->type = ND_ROUTER_ADVERT;
ra->code = 0;
ra->hop_limit = hop_limit;
ra->flags = calc_prio(ra_param);
ra->lifetime = htons(calc_lifetime(ra_param));
ra->reachable_time = 0;
ra->retrans_time = 0;
parm.ind = iface;
parm.managed = 0;
parm.other = 0;
@@ -232,7 +221,19 @@ static void send_ra(time_t now, int iface, char *iface_name, struct in6_addr *de
parm.now = now;
parm.glob_pref_time = parm.link_pref_time = parm.ula_pref_time = 0;
parm.adv_interval = calc_interval(ra_param);
parm.prio = calc_prio(ra_param);
save_counter(0);
ra = expand(sizeof(struct ra_packet));
ra->type = ND_ROUTER_ADVERT;
ra->code = 0;
ra->hop_limit = hop_limit;
ra->flags = parm.prio;
ra->lifetime = htons(calc_lifetime(ra_param));
ra->reachable_time = 0;
ra->retrans_time = 0;
/* set tag with name == interface */
iface_id.net = iface_name;
iface_id.next = NULL;
@@ -648,6 +649,32 @@ static int add_prefixes(struct in6_addr *local, int prefix,
inet_ntop(AF_INET6, local, daemon->addrbuff, ADDRSTRLEN);
if (!option_bool(OPT_QUIET_RA))
my_syslog(MS_DHCP | LOG_INFO, "RTR-ADVERT(%s) %s", param->if_name, daemon->addrbuff);
/* Send Route Information option (RFC4191, 2.3) */
put_opt6_char(ICMP6_OPT_RT_INFO);
/* Length in units of 8 octets will be 1 (header) +
* 0, 1 or 2 (0...128 bits / 64 bit per unit) */
if (0 == prefix)
put_opt6_char(1);
else if (prefix < 65)
put_opt6_char(2);
else
put_opt6_char(3);
put_opt6_char(prefix);
/* Same priority and advertised prefix */
put_opt6_char(param->prio);
/* "valid lifetime" seems more reasonable than "preferred" */
put_opt6_long(valid);
/* Actual prefix, only necessary part
* Don't append any data in case of prefix length == 0 */
if (0 != prefix)
{
if (prefix < 65)
put_opt6((void *)local, 8);
else
put_opt6((void *)local, 16);
}
}
}
}