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authorJukka Rissanen <jukka.rissanen@linux.intel.com>2012-01-05 11:38:09 (GMT)
committerDaniel Wagner <daniel.wagner@bmw-carit.de>2012-01-05 12:17:26 (GMT)
commit195007a210055b96f42f29348cbce02915dea242 (patch)
treede2dc353c33f9f8999d0df16a87fe15da379ad1b /gdhcp
parent60bc9d2cdd88171bf10a545b46f49b5e7c6415ab (diff)
downloadconnman-195007a210055b96f42f29348cbce02915dea242.zip
connman-195007a210055b96f42f29348cbce02915dea242.tar.gz
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dhcpv6: Initial stateful DHCPv6 support.
This patch contains solicitation message support.
Diffstat (limited to 'gdhcp')
-rw-r--r--gdhcp/client.c419
-rw-r--r--gdhcp/common.c25
-rw-r--r--gdhcp/common.h2
-rw-r--r--gdhcp/gdhcp.h15
4 files changed, 450 insertions, 11 deletions
diff --git a/gdhcp/client.c b/gdhcp/client.c
index 32ed4aa..425f1cb 100644
--- a/gdhcp/client.c
+++ b/gdhcp/client.c
@@ -2,7 +2,7 @@
*
* DHCP client library with GLib integration
*
- * Copyright (C) 2009-2010 Intel Corporation. All rights reserved.
+ * Copyright (C) 2009-2011 Intel Corporation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
@@ -70,6 +70,7 @@ typedef enum _dhcp_client_state {
IPV4LL_MONITOR,
IPV4LL_DEFEND,
INFORMATION_REQ,
+ SOLICITATION,
} ClientState;
struct _GDHCPClient {
@@ -112,10 +113,20 @@ struct _GDHCPClient {
gpointer debug_data;
GDHCPClientEventFunc information_req_cb;
gpointer information_req_data;
+ GDHCPClientEventFunc solicitation_cb;
+ gpointer solicitation_data;
+ GDHCPClientEventFunc advertise_cb;
+ gpointer advertise_data;
char *last_address;
unsigned char *duid;
int duid_len;
+ unsigned char *server_duid;
+ int server_duid_len;
uint16_t status_code;
+ uint32_t iaid;
+ uint32_t T1, T2;
+ struct in6_addr ia_na;
+ struct in6_addr ia_ta;
};
static inline void debug(GDHCPClient *client, const char *format, ...)
@@ -254,6 +265,35 @@ static void add_dhcpv6_request_options(GDHCPClient *dhcp_client,
(*ptr_buf) += len;
break;
+ case G_DHCPV6_SERVERID:
+ if (dhcp_client->server_duid == NULL)
+ return;
+
+ len = 2 + 2 + dhcp_client->server_duid_len;
+ if ((*ptr_buf + len) > (buf + max_buf)) {
+ debug(dhcp_client, "Too long dhcpv6 message "
+ "when writing server id option");
+ return;
+ }
+
+ copy_option(*ptr_buf, G_DHCPV6_SERVERID,
+ dhcp_client->server_duid_len,
+ dhcp_client->server_duid);
+ (*ptr_buf) += len;
+ break;
+
+ case G_DHCPV6_RAPID_COMMIT:
+ len = 2 + 2;
+ if ((*ptr_buf + len) > (buf + max_buf)) {
+ debug(dhcp_client, "Too long dhcpv6 message "
+ "when writing rapid commit option");
+ return;
+ }
+
+ copy_option(*ptr_buf, G_DHCPV6_RAPID_COMMIT, 0, 0);
+ (*ptr_buf) += len;
+ break;
+
case G_DHCPV6_ORO:
break;
@@ -554,6 +594,132 @@ int g_dhcpv6_client_set_duid(GDHCPClient *dhcp_client, unsigned char *duid,
return 0;
}
+uint32_t g_dhcpv6_client_get_iaid(GDHCPClient *dhcp_client)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return 0;
+
+ return dhcp_client->iaid;
+}
+
+void g_dhcpv6_client_create_iaid(GDHCPClient *dhcp_client, int index,
+ unsigned char *iaid)
+{
+ uint8_t buf[6];
+
+ get_interface_mac_address(index, buf);
+
+ memcpy(iaid, &buf[2], 4);
+ dhcp_client->iaid = iaid[0] << 24 |
+ iaid[1] << 16 | iaid[2] << 8 | iaid[3];
+}
+
+int g_dhcpv6_client_get_timeouts(GDHCPClient *dhcp_client,
+ uint32_t *T1, uint32_t *T2)
+{
+ if (dhcp_client == NULL || dhcp_client->type == G_DHCP_IPV4)
+ return -EINVAL;
+
+ if (T1 != NULL)
+ *T1 = dhcp_client->T1;
+
+ if (T2 != NULL)
+ *T2 = dhcp_client->T2;
+
+ return 0;
+}
+
+static uint8_t *create_iaaddr(GDHCPClient *dhcp_client, uint8_t *buf,
+ uint16_t len)
+{
+ buf[0] = 0;
+ buf[1] = G_DHCPV6_IAADDR;
+ buf[2] = 0;
+ buf[3] = len;
+ memcpy(&buf[4], &dhcp_client->ia_na, 16);
+ memset(&buf[20], 0, 4); /* preferred */
+ memset(&buf[24], 0, 4); /* valid */
+ return buf;
+}
+
+static void put_iaid(GDHCPClient *dhcp_client, int index, uint8_t *buf)
+{
+ uint32_t iaid;
+
+ iaid = g_dhcpv6_client_get_iaid(dhcp_client);
+ if (iaid == 0) {
+ g_dhcpv6_client_create_iaid(dhcp_client, index, buf);
+ return;
+ }
+
+ buf[0] = iaid >> 24;
+ buf[1] = iaid >> 16;
+ buf[2] = iaid >> 8;
+ buf[3] = iaid;
+}
+
+int g_dhcpv6_client_set_ia(GDHCPClient *dhcp_client, int index,
+ int code, uint32_t *T1, uint32_t *T2,
+ gboolean add_iaaddr)
+{
+ if (code == G_DHCPV6_IA_TA) {
+ uint8_t ia_options[4];
+
+ put_iaid(dhcp_client, index, ia_options);
+
+ g_dhcp_client_set_request(dhcp_client, G_DHCPV6_IA_TA);
+ g_dhcpv6_client_set_send(dhcp_client, G_DHCPV6_IA_TA,
+ ia_options, sizeof(ia_options));
+
+ } else if (code == G_DHCPV6_IA_NA) {
+
+ g_dhcp_client_set_request(dhcp_client, G_DHCPV6_IA_NA);
+
+ if (add_iaaddr == TRUE) {
+#define IAADDR_LEN (16+4+4)
+ uint8_t ia_options[4+4+4+2+2+IAADDR_LEN];
+
+ put_iaid(dhcp_client, index, ia_options);
+
+ if (T1 != NULL) {
+ ia_options[4] = *T1 >> 24;
+ ia_options[5] = *T1 >> 16;
+ ia_options[6] = *T1 >> 8;
+ ia_options[7] = *T1;
+ } else
+ memset(&ia_options[4], 0x00, 4);
+
+ if (T2 != NULL) {
+ ia_options[8] = *T2 >> 24;
+ ia_options[9] = *T2 >> 16;
+ ia_options[10] = *T2 >> 8;
+ ia_options[11] = *T2;
+ } else
+ memset(&ia_options[8], 0x00, 4);
+
+ create_iaaddr(dhcp_client, &ia_options[12],
+ IAADDR_LEN);
+
+ g_dhcpv6_client_set_send(dhcp_client, G_DHCPV6_IA_NA,
+ ia_options, sizeof(ia_options));
+ } else {
+ uint8_t ia_options[4+4+4];
+
+ put_iaid(dhcp_client, index, ia_options);
+
+ memset(&ia_options[4], 0x00, 4); /* T1 (4 bytes) */
+ memset(&ia_options[8], 0x00, 4); /* T2 (4 bytes) */
+
+ g_dhcpv6_client_set_send(dhcp_client, G_DHCPV6_IA_NA,
+ ia_options, sizeof(ia_options));
+ }
+
+ } else
+ return -EINVAL;
+
+ return 0;
+}
+
int g_dhcpv6_client_set_oro(GDHCPClient *dhcp_client, int args, ...)
{
va_list va;
@@ -608,6 +774,11 @@ static int send_dhcpv6_msg(GDHCPClient *dhcp_client, int type, char *msg)
return ret;
}
+static int send_solicitation(GDHCPClient *dhcp_client)
+{
+ return send_dhcpv6_msg(dhcp_client, DHCPV6_SOLICIT, "solicit");
+}
+
static int send_information_req(GDHCPClient *dhcp_client)
{
return send_dhcpv6_msg(dhcp_client, DHCPV6_INFORMATION_REQ,
@@ -1339,9 +1510,127 @@ static GList *get_option_value_list(char *value, GDHCPOptionType type)
return list;
}
+static inline uint32_t get_uint32(unsigned char *value)
+{
+ return value[0] << 24 | value[1] << 16 |
+ value[2] << 8 | value[3];
+}
+
+static inline uint16_t get_uint16(unsigned char *value)
+{
+ return value[0] << 8 | value[1];
+}
+
+static GList *get_addresses(GDHCPClient *dhcp_client,
+ int code, int len,
+ unsigned char *value,
+ uint16_t *status)
+{
+ GList *list = NULL;
+ struct in6_addr addr;
+ uint32_t iaid, T1 = 0, T2 = 0, preferred = 0, valid = 0;
+ uint16_t option_len, option_code, st = 0, max_len;
+ int addr_count = 0, i, pos;
+ uint8_t *option;
+ char *str;
+
+ iaid = get_uint32(&value[0]);
+ if (dhcp_client->iaid != iaid)
+ return NULL;
+
+ if (code == G_DHCPV6_IA_NA) {
+ T1 = get_uint32(&value[4]);
+ T2 = get_uint32(&value[8]);
+
+ if (T1 > T2)
+ /* RFC 3315, 22.4 */
+ return NULL;
+
+ pos = 12;
+ } else
+ pos = 4;
+
+ if (len <= pos)
+ return NULL;
+
+ max_len = len - pos;
+
+ /* We have more sub-options in this packet. */
+ do {
+ option = dhcpv6_get_sub_option(&value[pos], max_len,
+ &option_code, &option_len);
+
+ debug(dhcp_client, "pos %d option %p code %d len %d",
+ pos, option, option_code, option_len);
+
+ if (option == NULL)
+ break;
+
+ if (pos >= max_len)
+ break;
+
+ switch (option_code) {
+ case G_DHCPV6_IAADDR:
+ i = 0;
+ memcpy(&addr, &option[0], sizeof(addr));
+ i += sizeof(addr);
+ preferred = get_uint32(&option[i]);
+ i += 4;
+ valid = get_uint32(&option[i]);
+
+ addr_count++;
+ break;
+
+ case G_DHCPV6_STATUS_CODE:
+ st = get_uint16(&option[0]);
+ debug(dhcp_client, "error code %d", st);
+ if (option_len > 2) {
+ str = g_strndup((gchar *)&option[2],
+ option_len - 2);
+ debug(dhcp_client, "error text: %s", str);
+ g_free(str);
+ }
+
+ *status = st;
+ break;
+ }
+
+ pos += 2 + 2 + option_len;
+
+ } while (option != NULL);
+
+ if (addr_count > 0 && st == 0) {
+ /* We only support one address atm */
+ char str[INET6_ADDRSTRLEN + 1];
+
+ if (preferred > valid)
+ /* RFC 3315, 22.6 */
+ return NULL;
+
+ dhcp_client->T1 = T1;
+ dhcp_client->T2 = T2;
+
+ inet_ntop(AF_INET6, &addr, str, INET6_ADDRSTRLEN);
+ debug(dhcp_client, "count %d addr %s T1 %u T2 %u",
+ addr_count, str, T1, T2);
+
+ list = g_list_append(list, g_strdup(str));
+
+ if (code == G_DHCPV6_IA_NA)
+ memcpy(&dhcp_client->ia_na, &addr,
+ sizeof(struct in6_addr));
+ else
+ memcpy(&dhcp_client->ia_ta, &addr,
+ sizeof(struct in6_addr));
+ }
+
+ return list;
+}
+
static GList *get_dhcpv6_option_value_list(GDHCPClient *dhcp_client,
int code, int len,
- unsigned char *value)
+ unsigned char *value,
+ uint16_t *status)
{
GList *list = NULL;
char *str;
@@ -1371,6 +1660,11 @@ static GList *get_dhcpv6_option_value_list(GDHCPClient *dhcp_client,
}
break;
+ case G_DHCPV6_IA_NA: /* RFC 3315, chapter 22.4 */
+ case G_DHCPV6_IA_TA: /* RFC 3315, chapter 22.5 */
+ list = get_addresses(dhcp_client, code, len, value, status);
+ break;
+
default:
break;
}
@@ -1380,7 +1674,7 @@ static GList *get_dhcpv6_option_value_list(GDHCPClient *dhcp_client,
static void get_dhcpv6_request(GDHCPClient *dhcp_client,
struct dhcpv6_packet *packet,
- uint16_t pkt_len)
+ uint16_t pkt_len, uint16_t *status)
{
GList *list, *value_list;
uint8_t *option;
@@ -1399,7 +1693,7 @@ static void get_dhcpv6_request(GDHCPClient *dhcp_client,
}
value_list = get_dhcpv6_option_value_list(dhcp_client, code,
- option_len, option);
+ option_len, option, status);
debug(dhcp_client, "code %d %p len %d list %p", code, option,
option_len, value_list);
@@ -1458,7 +1752,7 @@ static gboolean listener_event(GIOChannel *channel, GIOCondition condition,
struct dhcp_packet packet;
struct dhcpv6_packet *packet6 = NULL;
uint8_t *message_type = NULL, *client_id = NULL, *option_u8,
- *server_id;
+ *server_id = NULL;
uint16_t option_len = 0, status = 0;
gpointer pkt;
unsigned char buf[MAX_DHCPV6_PKT_SIZE];
@@ -1520,11 +1814,15 @@ static gboolean listener_event(GIOChannel *channel, GIOCondition condition,
if (option_u8 != 0 && option_len > 0) {
status = option_u8[0]<<8 | option_u8[1];
if (status != 0) {
- gchar *txt = g_strndup((gchar *)&option_u8[2],
- option_len - 2);
- debug(dhcp_client, "error code %d: %s",
- status, txt);
- g_free(txt);
+ debug(dhcp_client, "error code %d", status);
+ if (option_len > 2) {
+ gchar *txt = g_strndup(
+ (gchar *)&option_u8[2],
+ option_len - 2);
+ debug(dhcp_client, "error text: %s",
+ txt);
+ g_free(txt);
+ }
}
dhcp_client->status_code = status;
} else
@@ -1598,6 +1896,66 @@ static gboolean listener_event(GIOChannel *channel, GIOCondition condition,
}
break;
+ case SOLICITATION:
+ if (dhcp_client->type != G_DHCP_IPV6)
+ return TRUE;
+
+ if (packet6->message != DHCPV6_REPLY &&
+ packet6->message != DHCPV6_ADVERTISE)
+ return TRUE;
+
+ count = 0;
+ server_id = dhcpv6_get_option(packet6, pkt_len,
+ G_DHCPV6_SERVERID, &option_len, &count);
+ if (server_id == NULL || count != 1 || option_len == 0) {
+ /* RFC 3315, 15.10 */
+ debug(dhcp_client,
+ "server duid error, discarding msg %p/%d/%d",
+ server_id, option_len, count);
+ return TRUE;
+ }
+ dhcp_client->server_duid = g_try_malloc(option_len);
+ if (dhcp_client->server_duid == NULL)
+ return TRUE;
+ memcpy(dhcp_client->server_duid, server_id, option_len);
+ dhcp_client->server_duid_len = option_len;
+
+ if (packet6->message == DHCPV6_REPLY) {
+ uint8_t *rapid_commit;
+ count = 0;
+ option_len = 0;
+ rapid_commit = dhcpv6_get_option(packet6, pkt_len,
+ G_DHCPV6_RAPID_COMMIT,
+ &option_len, &count);
+ if (rapid_commit == NULL || option_len == 0 ||
+ count != 1)
+ /* RFC 3315, 17.1.4 */
+ return TRUE;
+ }
+
+ switch_listening_mode(dhcp_client, L_NONE);
+
+ if (dhcp_client->status_code == 0)
+ get_dhcpv6_request(dhcp_client, packet6, pkt_len,
+ &dhcp_client->status_code);
+
+ if (packet6->message == DHCPV6_ADVERTISE) {
+ if (dhcp_client->advertise_cb != NULL)
+ dhcp_client->advertise_cb(dhcp_client,
+ dhcp_client->advertise_data);
+ return TRUE;
+ }
+
+ if (dhcp_client->solicitation_cb != NULL) {
+ /*
+ * The dhcp_client might not be valid after the
+ * callback call so just return immediately.
+ */
+ dhcp_client->solicitation_cb(dhcp_client,
+ dhcp_client->solicitation_data);
+ return TRUE;
+ }
+ break;
case INFORMATION_REQ:
if (dhcp_client->type != G_DHCP_IPV6)
return TRUE;
@@ -1618,7 +1976,10 @@ static gboolean listener_event(GIOChannel *channel, GIOCondition condition,
}
switch_listening_mode(dhcp_client, L_NONE);
- get_dhcpv6_request(dhcp_client, packet6, pkt_len);
+
+ dhcp_client->status_code = 0;
+ get_dhcpv6_request(dhcp_client, packet6, pkt_len,
+ &dhcp_client->status_code);
if (dhcp_client->information_req_cb != NULL) {
/*
@@ -1732,7 +2093,18 @@ int g_dhcp_client_start(GDHCPClient *dhcp_client, const char *last_address)
return re;
}
send_information_req(dhcp_client);
+
+ } else if (dhcp_client->solicitation_cb) {
+ dhcp_client->state = SOLICITATION;
+ re = switch_listening_mode(dhcp_client, L3);
+ if (re != 0) {
+ switch_listening_mode(dhcp_client, L_NONE);
+ dhcp_client->state = 0;
+ return re;
+ }
+ send_solicitation(dhcp_client);
}
+
return 0;
}
@@ -1851,6 +2223,18 @@ void g_dhcp_client_register_event(GDHCPClient *dhcp_client,
dhcp_client->information_req_cb = func;
dhcp_client->information_req_data = data;
return;
+ case G_DHCP_CLIENT_EVENT_SOLICITATION:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->solicitation_cb = func;
+ dhcp_client->solicitation_data = data;
+ return;
+ case G_DHCP_CLIENT_EVENT_ADVERTISE:
+ if (dhcp_client->type == G_DHCP_IPV4)
+ return;
+ dhcp_client->advertise_cb = func;
+ dhcp_client->advertise_data = data;
+ return;
}
}
@@ -1887,6 +2271,7 @@ char *g_dhcp_client_get_netmask(GDHCPClient *dhcp_client)
case IPV4LL_PROBE:
case IPV4LL_ANNOUNCE:
case INFORMATION_REQ:
+ case SOLICITATION:
break;
}
return NULL;
@@ -1904,6 +2289,17 @@ GDHCPClientError g_dhcp_client_set_request(GDHCPClient *dhcp_client,
return G_DHCP_CLIENT_ERROR_NONE;
}
+void g_dhcp_client_clear_requests(GDHCPClient *dhcp_client)
+{
+ g_list_free(dhcp_client->request_list);
+ dhcp_client->request_list = NULL;
+}
+
+void g_dhcp_client_clear_values(GDHCPClient *dhcp_client)
+{
+ g_hash_table_remove_all(dhcp_client->send_value_hash);
+}
+
static uint8_t *alloc_dhcp_option(int code, const char *str, int extra)
{
uint8_t *storage;
@@ -2004,6 +2400,7 @@ void g_dhcp_client_unref(GDHCPClient *dhcp_client)
g_free(dhcp_client->assigned_ip);
g_free(dhcp_client->last_address);
g_free(dhcp_client->duid);
+ g_free(dhcp_client->server_duid);
g_list_free(dhcp_client->request_list);
g_list_free(dhcp_client->require_list);
diff --git a/gdhcp/common.c b/gdhcp/common.c
index 46cf5f6..c511e26 100644
--- a/gdhcp/common.c
+++ b/gdhcp/common.c
@@ -188,6 +188,31 @@ uint8_t *dhcpv6_get_option(struct dhcpv6_packet *packet, uint16_t pkt_len,
return found;
}
+uint8_t *dhcpv6_get_sub_option(unsigned char *option, uint16_t max_len,
+ uint16_t *option_code, uint16_t *option_len)
+{
+ int rem;
+ uint16_t code, len;
+
+ rem = max_len - 2 - 2;
+
+ if (rem <= 0)
+ /* Bad option */
+ return NULL;
+
+ code = option[0] << 8 | option[1];
+ len = option[2] << 8 | option[3];
+
+ rem -= len;
+ if (rem < 0)
+ return NULL;
+
+ *option_code = code;
+ *option_len = len;
+
+ return &option[4];
+}
+
/*
* Add an option (supplied in binary form) to the options.
* Option format: [code][len][data1][data2]..[dataLEN]
diff --git a/gdhcp/common.h b/gdhcp/common.h
index ae4029c..4b7df7e 100644
--- a/gdhcp/common.h
+++ b/gdhcp/common.h
@@ -188,6 +188,8 @@ static const uint8_t dhcp_option_lengths[] = {
uint8_t *dhcp_get_option(struct dhcp_packet *packet, int code);
uint8_t *dhcpv6_get_option(struct dhcpv6_packet *packet, uint16_t pkt_len,
int code, uint16_t *option_len, int *option_count);
+uint8_t *dhcpv6_get_sub_option(unsigned char *option, uint16_t max_len,
+ uint16_t *code, uint16_t *option_len);
int dhcp_end_option(uint8_t *optionptr);
void dhcp_add_binary_option(struct dhcp_packet *packet, uint8_t *addopt);
void dhcpv6_add_binary_option(struct dhcpv6_packet *packet, uint16_t max_len,
diff --git a/gdhcp/gdhcp.h b/gdhcp/gdhcp.h
index c0385d4..5684854 100644
--- a/gdhcp/gdhcp.h
+++ b/gdhcp/gdhcp.h
@@ -53,6 +53,8 @@ typedef enum {
G_DHCP_CLIENT_EVENT_IPV4LL_LOST,
G_DHCP_CLIENT_EVENT_ADDRESS_CONFLICT,
G_DHCP_CLIENT_EVENT_INFORMATION_REQ,
+ G_DHCP_CLIENT_EVENT_SOLICITATION,
+ G_DHCP_CLIENT_EVENT_ADVERTISE,
} GDHCPClientEvent;
typedef enum {
@@ -71,8 +73,12 @@ typedef enum {
#define G_DHCPV6_CLIENTID 1
#define G_DHCPV6_SERVERID 2
+#define G_DHCPV6_IA_NA 3
+#define G_DHCPV6_IA_TA 4
+#define G_DHCPV6_IAADDR 5
#define G_DHCPV6_ORO 6
#define G_DHCPV6_STATUS_CODE 13
+#define G_DHCPV6_RAPID_COMMIT 14
#define G_DHCPV6_DNS_SERVERS 23
#define G_DHCPV6_SNTP_SERVERS 31
@@ -102,6 +108,8 @@ void g_dhcp_client_register_event(GDHCPClient *client,
GDHCPClientError g_dhcp_client_set_request(GDHCPClient *client,
unsigned int option_code);
+void g_dhcp_client_clear_requests(GDHCPClient *dhcp_client);
+void g_dhcp_client_clear_values(GDHCPClient *dhcp_client);
GDHCPClientError g_dhcp_client_set_send(GDHCPClient *client,
unsigned char option_code,
const char *option_value);
@@ -122,6 +130,13 @@ void g_dhcpv6_client_set_send(GDHCPClient *dhcp_client, uint16_t option_code,
uint8_t *option_value, uint16_t option_len);
uint16_t g_dhcpv6_client_get_status(GDHCPClient *dhcp_client);
int g_dhcpv6_client_set_oro(GDHCPClient *dhcp_client, int args, ...);
+void g_dhcpv6_client_create_iaid(GDHCPClient *dhcp_client, int index,
+ unsigned char *iaid);
+int g_dhcpv6_client_get_timeouts(GDHCPClient *dhcp_client,
+ uint32_t *T1, uint32_t *T2);
+uint32_t g_dhcpv6_client_get_iaid(GDHCPClient *dhcp_client);
+int g_dhcpv6_client_set_ia(GDHCPClient *dhcp_client, int index,
+ int code, uint32_t *T1, uint32_t *T2, gboolean add_iaaddr);
/* DHCP Server */
typedef enum {