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Tweak sending ICMP6 echo requests for slaac.

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This commit is contained in:
Simon Kelley
2012-04-04 20:48:16 +01:00
parent 6c559c34df
commit 89382bacaa
1 changed files with 12 additions and 9 deletions
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21
src/slaac.c
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@@ -108,8 +108,8 @@ time_t periodic_slaac(time_t now, struct dhcp_lease *leases)
{
struct dhcp_context *context;
struct dhcp_lease *lease;
struct slaac_address *slaac;
time_t next_event = 0;
struct slaac_address *slaac;
time_t next_event = 0;
for (context = daemon->ra_contexts; context; context = context->next)
if ((context->flags & CONTEXT_RA_NAME))
@@ -139,8 +139,7 @@ time_t periodic_slaac(time_t now, struct dhcp_lease *leases)
{
struct ping_packet *ping;
struct sockaddr_in6 addr;
int err;
save_counter(0);
ping = expand(sizeof(struct ping_packet));
ping->type = ICMP6_ECHO_REQUEST;
@@ -156,9 +155,15 @@ time_t periodic_slaac(time_t now, struct dhcp_lease *leases)
addr.sin6_port = htons(IPPROTO_ICMPV6);
addr.sin6_addr = slaac->addr;
if (send_from(daemon->icmp6fd, 0, daemon->outpacket.iov_base, save_counter(0),
(union mysockaddr *)&addr, (struct all_addr *)&slaac->local,
lease->last_interface, &err))
if (sendto(daemon->icmp6fd, daemon->outpacket.iov_base, save_counter(0), 0,
(struct sockaddr *)&addr, sizeof(addr)) == -1 &&
errno == EHOSTUNREACH)
{
slaac->ping_time = 0; /* Give up */
inet_ntop(AF_INET6, &addr, daemon->addrbuff, ADDRSTRLEN);
my_syslog(MS_DHCP | LOG_INFO, "SLAAC-HOSTUNREACH %s", daemon->addrbuff);
}
else
{
slaac->ping_time += (1 << (slaac->backoff - 1)) + (rand16()/21785); /* 0 - 3 */
if (slaac->backoff > 4)
@@ -166,8 +171,6 @@ time_t periodic_slaac(time_t now, struct dhcp_lease *leases)
if (slaac->backoff < 12)
slaac->backoff++;
}
else if (err == EHOSTUNREACH)
slaac->ping_time = 0; /* Give up */
}
if (slaac->ping_time != 0 &&