/**
* Collect entropy from host.
*
* This uses the host's name and its IP addresses.
*/
static void
entropy_collect_host(SHA1Context *ctx)
{
const char *name;
GSList *hosts, *sl;
name = local_hostname();
sha1_feed_string(ctx, name);
hosts = name_to_host_addr(name, NET_TYPE_NONE);
GM_SLIST_FOREACH(hosts, sl) {
host_addr_t *addr = sl->data;
struct packed_host_addr packed = host_addr_pack(*addr);
SHA1Input(ctx, &packed, packed_host_addr_size(packed));
}
/**
* Add child to the node, carrying an IP:port.
*
* @param t the tree node where child must be added
* @param name the name of the child
* @param addr the IP address
* @param port the port address
*
* @return the added child node
*/
static g2_tree_t *
g2_build_add_host(g2_tree_t *t, const char *name, host_addr_t addr, uint16 port)
{
struct packed_host_addr packed;
uint alen;
char payload[18]; /* Large enough for IPv6 as well, one day? */
void *p;
g2_tree_t *c;
packed = host_addr_pack(addr);
alen = packed_host_addr_size(packed) - 1; /* skip network byte */
p = mempcpy(payload, &packed.addr, alen);
p = poke_le16(p, port);
c = g2_tree_alloc_copy(name, payload, ptr_diff(p, payload));
g2_tree_add_child(t, c);
return c;
}
