void make_discover	(	struct interface_info *	ip,
		struct client_lease *	lease
	)
Definition at line 1267 of file dhclient.c.
Referenced by state_init().
{
    unsigned char discover = DHCPDISCOVER;
    struct tree_cache *options[256];
    struct tree_cache option_elements[256];
    int i;
    ULONG foo = (ULONG) GetTickCount();

    memset(option_elements, 0, sizeof(option_elements));
    memset(options, 0, sizeof(options));
    memset(&ip->client->packet, 0, sizeof(ip->client->packet));

    /* Set DHCP_MESSAGE_TYPE to DHCPDISCOVER */
    i = DHO_DHCP_MESSAGE_TYPE;
    options[i] = &option_elements[i];
    options[i]->value = &discover;
    options[i]->len = sizeof(discover);
    options[i]->buf_size = sizeof(discover);
    options[i]->timeout = 0xFFFFFFFF;

    /* Request the options we want */
    i  = DHO_DHCP_PARAMETER_REQUEST_LIST;
    options[i] = &option_elements[i];
    options[i]->value = ip->client->config->requested_options;
    options[i]->len = ip->client->config->requested_option_count;
    options[i]->buf_size =
        ip->client->config->requested_option_count;
    options[i]->timeout = 0xFFFFFFFF;

    /* If we had an address, try to get it again. */
    if (lease) {
        ip->client->requested_address = lease->address;
        i = DHO_DHCP_REQUESTED_ADDRESS;
        options[i] = &option_elements[i];
        options[i]->value = lease->address.iabuf;
        options[i]->len = lease->address.len;
        options[i]->buf_size = lease->address.len;
        options[i]->timeout = 0xFFFFFFFF;
    } else
        ip->client->requested_address.len = 0;

    /* Send any options requested in the config file. */
    for (i = 0; i < 256; i++)
        if (!options[i] &&
            ip->client->config->send_options[i].data) {
            options[i] = &option_elements[i];
            options[i]->value =
                ip->client->config->send_options[i].data;
            options[i]->len =
                ip->client->config->send_options[i].len;
            options[i]->buf_size =
                ip->client->config->send_options[i].len;
            options[i]->timeout = 0xFFFFFFFF;
        }

    /* Set up the option buffer... */
    ip->client->packet_length = cons_options(NULL, &ip->client->packet, 0,
        options, 0, 0, 0, NULL, 0);
    if (ip->client->packet_length < BOOTP_MIN_LEN)
        ip->client->packet_length = BOOTP_MIN_LEN;

    ip->client->packet.op = BOOTREQUEST;
    ip->client->packet.htype = ip->hw_address.htype;
    ip->client->packet.hlen = ip->hw_address.hlen;
    ip->client->packet.hops = 0;
    ip->client->packet.xid = RtlRandom(&foo);
    ip->client->packet.secs = 0; /* filled in by send_discover. */
    ip->client->packet.flags = 0;

    memset(&(ip->client->packet.ciaddr),
        0, sizeof(ip->client->packet.ciaddr));
    memset(&(ip->client->packet.yiaddr),
        0, sizeof(ip->client->packet.yiaddr));
    memset(&(ip->client->packet.siaddr),
        0, sizeof(ip->client->packet.siaddr));
    memset(&(ip->client->packet.giaddr),
        0, sizeof(ip->client->packet.giaddr));
    memcpy(ip->client->packet.chaddr,
        ip->hw_address.haddr, ip->hw_address.hlen);
}
ReactOS Development > Doxygen
