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Prod neighbour discovery with ARP instead of PING.

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This commit is contained in:
Simon Kelley
2013-09-23 12:26:34 +01:00
parent 724789de13
commit d81b42d067
3 changed files with 32 additions and 26 deletions
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17
src/dhcp6.c
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@@ -183,13 +183,13 @@ void dhcp6_packet(time_t now)
return;
/* Recieving a packet from a host does not populate the neighbour
cache, so we send a ping to prompt neighbour discovery if we can't
cache, so we send a neighbour discovery request if we can't
find the sender. Repeat a few times in case of packet loss. */
for (i = 0; i < 5; i++)
{
struct timespec ts;
struct ping_packet *ping;
struct neigh_packet *neigh;
struct sockaddr_in6 addr;
mac_param.target = &from.sin6_addr;
@@ -201,12 +201,12 @@ void dhcp6_packet(time_t now)
break;
save_counter(0);
ping = expand(sizeof(struct ping_packet));
ping->type = ICMP6_ECHO_REQUEST;
ping->code = 0;
ping->identifier = 1;
ping->sequence_no = 1;
neigh = expand(sizeof(struct neigh_packet));
neigh->type = ND_NEIGHBOR_SOLICIT;
neigh->code = 0;
neigh->reserved = 0;
neigh->target = from.sin6_addr;
memset(&addr, 0, sizeof(addr));
#ifdef HAVE_SOCKADDR_SA_LEN
addr.sin6_len = sizeof(struct sockaddr_in6);
@@ -214,6 +214,7 @@ void dhcp6_packet(time_t now)
addr.sin6_family = AF_INET6;
addr.sin6_port = htons(IPPROTO_ICMPV6);
addr.sin6_addr = from.sin6_addr;
addr.sin6_scope_id = from.sin6_scope_id;
sendto(daemon->icmp6fd, daemon->outpacket.iov_base, save_counter(0), 0,
(struct sockaddr *)&addr, sizeof(addr));