diff options
Diffstat (limited to 'gdhcp/server.c')
| -rw-r--r-- | gdhcp/server.c | 899 |
1 files changed, 899 insertions, 0 deletions
diff --git a/gdhcp/server.c b/gdhcp/server.c new file mode 100644 index 00000000..7322e6e2 --- /dev/null +++ b/gdhcp/server.c @@ -0,0 +1,899 @@ +/* + * + * DHCP Server library with GLib integration + * + * Copyright (C) 2009-2010 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 + * published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <stdio.h> +#include <errno.h> +#include <unistd.h> +#include <stdlib.h> +#include <string.h> +#include <sys/ioctl.h> +#include <arpa/inet.h> + +#include <netpacket/packet.h> +#include <net/ethernet.h> +#include <net/if_arp.h> + +#include <linux/if.h> +#include <linux/filter.h> + +#include <glib.h> + +#include "common.h" + +/* 8 hours */ +#define DEFAULT_DHCP_LEASE_SEC (8*60*60) + +/* 5 minutes */ +#define OFFER_TIME (5*60) + +struct _GDHCPServer { + gint ref_count; + GDHCPType type; + gboolean started; + int ifindex; + char *interface; + uint32_t start_ip; + uint32_t end_ip; + uint32_t server_nip; + uint32_t lease_seconds; + int listener_sockfd; + guint listener_watch; + GIOChannel *listener_channel; + GList *lease_list; + GHashTable *nip_lease_hash; + GHashTable *option_hash; /* Options send to client */ + GDHCPSaveLeaseFunc save_lease_func; + GDHCPDebugFunc debug_func; + gpointer debug_data; +}; + +struct dhcp_lease { + time_t expire; + uint32_t lease_nip; + uint8_t lease_mac[ETH_ALEN]; +}; + +static inline void debug(GDHCPServer *server, const char *format, ...) +{ + char str[256]; + va_list ap; + + if (server->debug_func == NULL) + return; + + va_start(ap, format); + + if (vsnprintf(str, sizeof(str), format, ap) > 0) + server->debug_func(str, server->debug_data); + + va_end(ap); +} + +static struct dhcp_lease *find_lease_by_mac(GDHCPServer *dhcp_server, + const uint8_t *mac) +{ + GList *list; + + for (list = dhcp_server->lease_list; list; list = list->next) { + struct dhcp_lease *lease = list->data; + + if (memcmp(lease->lease_mac, mac, ETH_ALEN) == 0) + return lease; + } + + return NULL; +} + +static void remove_lease(GDHCPServer *dhcp_server, struct dhcp_lease *lease) +{ + dhcp_server->lease_list = + g_list_remove(dhcp_server->lease_list, lease); + + g_hash_table_remove(dhcp_server->nip_lease_hash, + GINT_TO_POINTER((int) lease->lease_nip)); + g_free(lease); +} + +/* Clear the old lease and create the new one */ +static int get_lease(GDHCPServer *dhcp_server, uint32_t yiaddr, + const uint8_t *mac, struct dhcp_lease **lease) +{ + struct dhcp_lease *lease_nip, *lease_mac; + + if (yiaddr == 0) + return -ENXIO; + + if (ntohl(yiaddr) < dhcp_server->start_ip) + return -ENXIO; + + if (ntohl(yiaddr) > dhcp_server->end_ip) + return -ENXIO; + + if (memcmp(mac, MAC_BCAST_ADDR, ETH_ALEN) == 0) + return -ENXIO; + + if (memcmp(mac, MAC_ANY_ADDR, ETH_ALEN) == 0) + return -ENXIO; + + lease_mac = find_lease_by_mac(dhcp_server, mac); + + lease_nip = g_hash_table_lookup(dhcp_server->nip_lease_hash, + GINT_TO_POINTER((int) yiaddr)); + debug(dhcp_server, "lease_mac %p lease_nip %p", lease_mac, lease_nip); + + if (lease_nip != NULL) { + dhcp_server->lease_list = + g_list_remove(dhcp_server->lease_list, + lease_nip); + g_hash_table_remove(dhcp_server->nip_lease_hash, + GINT_TO_POINTER((int) yiaddr)); + + if (lease_mac == NULL) + *lease = lease_nip; + else if (lease_nip != lease_mac) { + remove_lease(dhcp_server, lease_mac); + *lease = lease_nip; + } else + *lease = lease_nip; + + return 0; + } + + if (lease_mac != NULL) { + dhcp_server->lease_list = + g_list_remove(dhcp_server->lease_list, + lease_mac); + g_hash_table_remove(dhcp_server->nip_lease_hash, + GINT_TO_POINTER((int) lease_mac->lease_nip)); + *lease = lease_mac; + + return 0; + } + + *lease = g_try_new0(struct dhcp_lease, 1); + if (*lease == NULL) + return -ENOMEM; + + return 0; +} + +static gint compare_expire(gconstpointer a, gconstpointer b) +{ + const struct dhcp_lease *lease1 = a; + const struct dhcp_lease *lease2 = b; + + return lease2->expire - lease1->expire; +} + +static struct dhcp_lease *add_lease(GDHCPServer *dhcp_server, uint32_t expire, + const uint8_t *chaddr, uint32_t yiaddr) +{ + struct dhcp_lease *lease = NULL; + int ret; + + ret = get_lease(dhcp_server, yiaddr, chaddr, &lease); + if (ret != 0) + return NULL; + + memset(lease, 0, sizeof(*lease)); + + memcpy(lease->lease_mac, chaddr, ETH_ALEN); + lease->lease_nip = yiaddr; + + if (expire == 0) + lease->expire = time(NULL) + dhcp_server->lease_seconds; + else + lease->expire = expire; + + dhcp_server->lease_list = g_list_insert_sorted(dhcp_server->lease_list, + lease, compare_expire); + + g_hash_table_insert(dhcp_server->nip_lease_hash, + GINT_TO_POINTER((int) lease->lease_nip), lease); + + return lease; +} + +static struct dhcp_lease *find_lease_by_nip(GDHCPServer *dhcp_server, + uint32_t nip) +{ + return g_hash_table_lookup(dhcp_server->nip_lease_hash, + GINT_TO_POINTER((int) nip)); +} + +/* Check if the IP is taken; if it is, add it to the lease table */ +static gboolean arp_check(uint32_t nip, const uint8_t *safe_mac) +{ + /* TODO: Add ARP checking */ + return TRUE; +} + +static gboolean is_expired_lease(struct dhcp_lease *lease) +{ + if (lease->expire < time(NULL)) + return TRUE; + + return FALSE; +} + +static uint32_t find_free_or_expired_nip(GDHCPServer *dhcp_server, + const uint8_t *safe_mac) +{ + uint32_t ip_addr; + struct dhcp_lease *lease; + GList *list; + ip_addr = dhcp_server->start_ip; + for (; ip_addr <= dhcp_server->end_ip; ip_addr++) { + /* e.g. 192.168.55.0 */ + if ((ip_addr & 0xff) == 0) + continue; + + /* e.g. 192.168.55.255 */ + if ((ip_addr & 0xff) == 0xff) + continue; + + lease = find_lease_by_nip(dhcp_server, + (uint32_t) htonl(ip_addr)); + if (lease != NULL) + continue; + + if (arp_check(htonl(ip_addr), safe_mac) == TRUE) + return htonl(ip_addr); + } + + /* The last lease is the oldest one */ + list = g_list_last(dhcp_server->lease_list); + if (list == NULL) + return 0; + + lease = list->data; + if (lease == NULL) + return 0; + + if (is_expired_lease(lease) == FALSE) + return 0; + + if (arp_check(lease->lease_nip, safe_mac) == FALSE) + return 0; + + return lease->lease_nip; +} + +static void lease_set_expire(GDHCPServer *dhcp_server, + struct dhcp_lease *lease, uint32_t expire) +{ + dhcp_server->lease_list = g_list_remove(dhcp_server->lease_list, lease); + + lease->expire = expire; + + dhcp_server->lease_list = g_list_insert_sorted(dhcp_server->lease_list, + lease, compare_expire); +} + +static void distroy_lease_table(GDHCPServer *dhcp_server) +{ + GList *list; + + g_hash_table_destroy(dhcp_server->nip_lease_hash); + + dhcp_server->nip_lease_hash = NULL; + + for (list = dhcp_server->lease_list; list; list = list->next) { + struct dhcp_lease *lease = list->data; + + g_free(lease); + } + + g_list_free(dhcp_server->lease_list); + + dhcp_server->lease_list = NULL; +} +static uint32_t get_interface_address(int index) +{ + struct ifreq ifr; + int sk, err; + struct sockaddr_in *server_ip; + uint32_t ret = 0; + + sk = socket(PF_INET, SOCK_DGRAM, 0); + if (sk < 0) { + perror("Open socket error"); + return 0; + } + + memset(&ifr, 0, sizeof(ifr)); + ifr.ifr_ifindex = index; + + err = ioctl(sk, SIOCGIFNAME, &ifr); + if (err < 0) { + perror("Get interface name error"); + goto done; + } + + err = ioctl(sk, SIOCGIFADDR, &ifr); + if (err < 0) { + perror("Get ip address error"); + goto done; + } + + server_ip = (struct sockaddr_in *) &ifr.ifr_addr; + ret = server_ip->sin_addr.s_addr; + +done: + close(sk); + + return ret; +} + +GDHCPServer *g_dhcp_server_new(GDHCPType type, + int ifindex, GDHCPServerError *error) +{ + GDHCPServer *dhcp_server = NULL; + + if (ifindex < 0) { + *error = G_DHCP_SERVER_ERROR_INVALID_INDEX; + return NULL; + } + + dhcp_server = g_try_new0(GDHCPServer, 1); + if (dhcp_server == NULL) { + *error = G_DHCP_SERVER_ERROR_NOMEM; + return NULL; + } + + dhcp_server->interface = get_interface_name(ifindex); + if (dhcp_server->interface == NULL) { + *error = G_DHCP_SERVER_ERROR_INTERFACE_UNAVAILABLE; + goto error; + } + + if (interface_is_up(ifindex) == FALSE) { + *error = G_DHCP_SERVER_ERROR_INTERFACE_DOWN; + goto error; + } + + dhcp_server->server_nip = get_interface_address(ifindex); + if (dhcp_server->server_nip == 0) { + *error = G_DHCP_SERVER_ERROR_IP_ADDRESS_INVALID; + goto error; + } + + dhcp_server->nip_lease_hash = g_hash_table_new_full(g_direct_hash, + g_direct_equal, NULL, NULL); + dhcp_server->option_hash = g_hash_table_new_full(g_direct_hash, + g_direct_equal, NULL, NULL); + + dhcp_server->started = FALSE; + + /* All the leases have the same fixed lease time, + * do not support DHCP_LEASE_TIME option from client. + */ + dhcp_server->lease_seconds = DEFAULT_DHCP_LEASE_SEC; + + dhcp_server->type = type; + dhcp_server->ref_count = 1; + dhcp_server->ifindex = ifindex; + dhcp_server->listener_sockfd = -1; + dhcp_server->listener_watch = -1; + dhcp_server->listener_channel = NULL; + dhcp_server->save_lease_func = NULL; + dhcp_server->debug_func = NULL; + dhcp_server->debug_data = NULL; + + *error = G_DHCP_SERVER_ERROR_NONE; + + return dhcp_server; + +error: + g_free(dhcp_server->interface); + g_free(dhcp_server); + return NULL; +} + + +static uint8_t check_packet_type(struct dhcp_packet *packet) +{ + uint8_t *type; + + if (packet->hlen != ETH_ALEN) + return 0; + + if (packet->op != BOOTREQUEST) + return 0; + + type = dhcp_get_option(packet, DHCP_MESSAGE_TYPE); + + if (type == NULL) + return 0; + + if (*type < DHCP_MINTYPE) + return 0; + + if (*type > DHCP_MAXTYPE) + return 0; + + return *type; +} + +static void init_packet(GDHCPServer *dhcp_server, struct dhcp_packet *packet, + struct dhcp_packet *client_packet, char type) +{ + /* Sets op, htype, hlen, cookie fields + * and adds DHCP_MESSAGE_TYPE option */ + dhcp_init_header(packet, type); + + packet->xid = client_packet->xid; + memcpy(packet->chaddr, client_packet->chaddr, + sizeof(client_packet->chaddr)); + packet->flags = client_packet->flags; + packet->gateway_nip = client_packet->gateway_nip; + packet->ciaddr = client_packet->ciaddr; + dhcp_add_simple_option(packet, DHCP_SERVER_ID, dhcp_server->server_nip); +} + +static void add_option(gpointer key, gpointer value, gpointer user_data) +{ + const char *option_value = value; + uint8_t option_code = GPOINTER_TO_INT(key); + struct in_addr nip; + struct dhcp_packet *packet = user_data; + + if (option_value == NULL) + return; + + switch (option_code) { + case G_DHCP_SUBNET: + case G_DHCP_ROUTER: + case G_DHCP_DNS_SERVER: + if (inet_aton(option_value, &nip) == 0) + return; + + dhcp_add_simple_option(packet, (uint8_t) option_code, + nip.s_addr); + break; + default: + return; + } +} + +static void add_server_options(GDHCPServer *dhcp_server, + struct dhcp_packet *packet) +{ + g_hash_table_foreach(dhcp_server->option_hash, + add_option, packet); +} + +static gboolean check_requested_nip(GDHCPServer *dhcp_server, + uint32_t requested_nip) +{ + struct dhcp_lease *lease; + + if (requested_nip == 0) + return FALSE; + + if (ntohl(requested_nip) < dhcp_server->start_ip) + return FALSE; + + if (ntohl(requested_nip) > dhcp_server->end_ip) + return FALSE; + + lease = find_lease_by_nip(dhcp_server, requested_nip); + if (lease == NULL) + return TRUE; + + if (is_expired_lease(lease) == FALSE) + return FALSE; + + return TRUE; +} + +static void send_packet_to_client(GDHCPServer *dhcp_server, + struct dhcp_packet *dhcp_pkt) +{ + const uint8_t *chaddr; + uint32_t ciaddr; + + if ((dhcp_pkt->flags & htons(BROADCAST_FLAG)) + || dhcp_pkt->ciaddr == 0) { + debug(dhcp_server, "Broadcasting packet to client"); + ciaddr = INADDR_BROADCAST; + chaddr = MAC_BCAST_ADDR; + } else { + debug(dhcp_server, "Unicasting packet to client ciaddr"); + ciaddr = dhcp_pkt->ciaddr; + chaddr = dhcp_pkt->chaddr; + } + + dhcp_send_raw_packet(dhcp_pkt, + dhcp_server->server_nip, SERVER_PORT, + ciaddr, CLIENT_PORT, chaddr, + dhcp_server->ifindex); +} + +static void send_offer(GDHCPServer *dhcp_server, + struct dhcp_packet *client_packet, + struct dhcp_lease *lease, + uint32_t requested_nip) +{ + struct dhcp_packet packet; + struct in_addr addr; + + init_packet(dhcp_server, &packet, client_packet, DHCPOFFER); + + if (lease) + packet.yiaddr = lease->lease_nip; + else if (check_requested_nip(dhcp_server, requested_nip) == TRUE) + packet.yiaddr = requested_nip; + else + packet.yiaddr = find_free_or_expired_nip( + dhcp_server, client_packet->chaddr); + + debug(dhcp_server, "find yiaddr %u", packet.yiaddr); + + if (!packet.yiaddr) { + debug(dhcp_server, "Err: Can not found lease and send offer"); + return; + } + + lease = add_lease(dhcp_server, OFFER_TIME, + packet.chaddr, packet.yiaddr); + if (lease == NULL) { + debug(dhcp_server, + "Err: No free IP addresses. OFFER abandoned"); + return; + } + + dhcp_add_simple_option(&packet, DHCP_LEASE_TIME, + htonl(dhcp_server->lease_seconds)); + add_server_options(dhcp_server, &packet); + + addr.s_addr = packet.yiaddr; + + debug(dhcp_server, "Sending OFFER of %s", inet_ntoa(addr)); + send_packet_to_client(dhcp_server, &packet); +} + +static void save_lease(GDHCPServer *dhcp_server) +{ + GList *list; + + if (dhcp_server->save_lease_func == NULL) + return; + + for (list = dhcp_server->lease_list; list; list = list->next) { + struct dhcp_lease *lease = list->data; + dhcp_server->save_lease_func(lease->lease_mac, + lease->lease_nip, lease->expire); + } +} + +static void send_ACK(GDHCPServer *dhcp_server, + struct dhcp_packet *client_packet, uint32_t yiaddr) +{ + struct dhcp_packet packet; + uint32_t lease_time_sec; + struct in_addr addr; + + init_packet(dhcp_server, &packet, client_packet, DHCPACK); + packet.yiaddr = yiaddr; + + lease_time_sec = dhcp_server->lease_seconds; + + dhcp_add_simple_option(&packet, DHCP_LEASE_TIME, htonl(lease_time_sec)); + + add_server_options(dhcp_server, &packet); + + addr.s_addr = yiaddr; + + debug(dhcp_server, "Sending ACK to %s", inet_ntoa(addr)); + + send_packet_to_client(dhcp_server, &packet); + + add_lease(dhcp_server, 0, packet.chaddr, packet.yiaddr); +} + +static void send_NAK(GDHCPServer *dhcp_server, + struct dhcp_packet *client_packet) +{ + struct dhcp_packet packet; + + init_packet(dhcp_server, &packet, client_packet, DHCPNAK); + + debug(dhcp_server, "Sending NAK"); + + dhcp_send_raw_packet(&packet, + dhcp_server->server_nip, SERVER_PORT, + INADDR_BROADCAST, CLIENT_PORT, MAC_BCAST_ADDR, + dhcp_server->ifindex); +} + +static void send_inform(GDHCPServer *dhcp_server, + struct dhcp_packet *client_packet) +{ + struct dhcp_packet packet; + + init_packet(dhcp_server, &packet, client_packet, DHCPACK); + add_server_options(dhcp_server, &packet); + send_packet_to_client(dhcp_server, &packet); +} + +static gboolean listener_event(GIOChannel *channel, GIOCondition condition, + gpointer user_data) +{ + GDHCPServer *dhcp_server = user_data; + struct dhcp_packet packet; + struct dhcp_lease *lease; + uint32_t requested_nip = 0; + uint8_t type, *server_id_option, *request_ip_option; + int re; + + if (condition & (G_IO_NVAL | G_IO_ERR | G_IO_HUP)) { + dhcp_server->listener_watch = 0; + return FALSE; + } + + re = dhcp_recv_l3_packet(&packet, dhcp_server->listener_sockfd); + if (re < 0) + return TRUE; + + type = check_packet_type(&packet); + if (type == 0) + return TRUE; + + server_id_option = dhcp_get_option(&packet, DHCP_SERVER_ID); + if (server_id_option) { + uint32_t server_nid = dhcp_get_unaligned( + (uint32_t *) server_id_option); + + if (server_nid != dhcp_server->server_nip) + return TRUE; + } + + request_ip_option = dhcp_get_option(&packet, DHCP_REQUESTED_IP); + if (request_ip_option) + requested_nip = dhcp_get_unaligned( + (uint32_t *) request_ip_option); + + lease = find_lease_by_mac(dhcp_server, packet.chaddr); + + switch (type) { + case DHCPDISCOVER: + debug(dhcp_server, "Received DISCOVER"); + + send_offer(dhcp_server, &packet, lease, requested_nip); + break; + case DHCPREQUEST: + debug(dhcp_server, "Received REQUEST"); + if (requested_nip == 0) { + requested_nip = packet.ciaddr; + if (requested_nip == 0) + break; + } + + if (lease && requested_nip == lease->lease_nip) { + send_ACK(dhcp_server, &packet, + lease->lease_nip); + break; + } + + if (server_id_option) + send_NAK(dhcp_server, &packet); + + break; + case DHCPDECLINE: + debug(dhcp_server, "Received DECLINE"); + + if (server_id_option == NULL) + break; + + if (request_ip_option == NULL) + break; + + if (lease == NULL) + break; + + if (requested_nip == lease->lease_nip) + remove_lease(dhcp_server, lease); + + break; + case DHCPRELEASE: + debug(dhcp_server, "Received RELEASE"); + + if (server_id_option == NULL) + break; + + if (lease == NULL) + break; + + if (packet.ciaddr == lease->lease_nip) + lease_set_expire(dhcp_server, lease, + time(NULL)); + break; + case DHCPINFORM: + debug(dhcp_server, "Received INFORM"); + send_inform(dhcp_server, &packet); + break; + } + + return TRUE; +} + +/* Caller need to load leases before call it */ +int g_dhcp_server_start(GDHCPServer *dhcp_server) +{ + GIOChannel *listener_channel; + int listener_sockfd; + + if (dhcp_server->started == TRUE) + return 0; + + listener_sockfd = dhcp_l3_socket(SERVER_PORT, + dhcp_server->interface); + if (listener_sockfd < 0) + return -EIO; + + listener_channel = g_io_channel_unix_new(listener_sockfd); + if (listener_channel == NULL) { + close(listener_sockfd); + return -EIO; + } + + dhcp_server->listener_sockfd = listener_sockfd; + dhcp_server->listener_channel = listener_channel; + + g_io_channel_set_close_on_unref(listener_channel, TRUE); + dhcp_server->listener_watch = + g_io_add_watch_full(listener_channel, + G_PRIORITY_HIGH, G_IO_IN, + listener_event, dhcp_server, + NULL); + g_io_channel_unref(dhcp_server->listener_channel); + + dhcp_server->started = TRUE; + + return 0; +} + +int g_dhcp_server_set_option(GDHCPServer *dhcp_server, + unsigned char option_code, const char *option_value) +{ + struct in_addr nip; + + if (option_value == NULL) + return -EINVAL; + + debug(dhcp_server, "option_code %d option_value %s", + option_code, option_value); + switch (option_code) { + case G_DHCP_SUBNET: + case G_DHCP_ROUTER: + case G_DHCP_DNS_SERVER: + if (inet_aton(option_value, &nip) == 0) + return -ENXIO; + break; + default: + return -EINVAL; + } + + g_hash_table_replace(dhcp_server->option_hash, + GINT_TO_POINTER((int) option_code), + (gpointer) option_value); + return 0; +} + +void g_dhcp_server_set_save_lease(GDHCPServer *dhcp_server, + GDHCPSaveLeaseFunc func, gpointer user_data) +{ + if (dhcp_server == NULL) + return; + + dhcp_server->save_lease_func = func; +} + +GDHCPServer *g_dhcp_server_ref(GDHCPServer *dhcp_server) +{ + if (dhcp_server == NULL) + return NULL; + + g_atomic_int_inc(&dhcp_server->ref_count); + + return dhcp_server; +} + +void g_dhcp_server_stop(GDHCPServer *dhcp_server) +{ + /* Save leases, before stop; load them before start */ + save_lease(dhcp_server); + + if (dhcp_server->listener_watch > 0) { + g_source_remove(dhcp_server->listener_watch); + dhcp_server->listener_watch = 0; + } + + dhcp_server->listener_channel = NULL; + + dhcp_server->started = FALSE; +} + +void g_dhcp_server_unref(GDHCPServer *dhcp_server) +{ + if (dhcp_server == NULL) + return; + + if (g_atomic_int_dec_and_test(&dhcp_server->ref_count) == FALSE) + return; + + g_dhcp_server_stop(dhcp_server); + + g_hash_table_destroy(dhcp_server->option_hash); + + distroy_lease_table(dhcp_server); + + g_free(dhcp_server->interface); + + g_free(dhcp_server); +} + +void g_dhcp_server_load_lease(GDHCPServer *dhcp_server, unsigned int expire, + unsigned char *mac, unsigned int lease_ip) +{ + add_lease(dhcp_server, expire, mac, lease_ip); +} + +int g_dhcp_server_set_ip_range(GDHCPServer *dhcp_server, + const char *start_ip, const char *end_ip) +{ + struct in_addr _host_addr; + + if (inet_aton(start_ip, &_host_addr) == 0) + return -ENXIO; + + dhcp_server->start_ip = ntohl(_host_addr.s_addr); + + if (inet_aton(end_ip, &_host_addr) == 0) + return -ENXIO; + + dhcp_server->end_ip = ntohl(_host_addr.s_addr); + + return 0; +} + +void g_dhcp_server_set_lease_time(GDHCPServer *dhcp_server, unsigned int lease_time) +{ + if (dhcp_server == NULL) + return; + + dhcp_server->lease_seconds = lease_time; +} + +void g_dhcp_server_set_debug(GDHCPServer *dhcp_server, + GDHCPDebugFunc func, gpointer user_data) +{ + if (dhcp_server == NULL) + return; + + dhcp_server->debug_func = func; + dhcp_server->debug_data = user_data; +} |