Пример #1
0
int FAST_FUNC send_ACK(struct dhcpMessage *oldpacket, uint32_t yiaddr)
{
	struct dhcpMessage packet;
	struct option_set *curr;
	uint8_t *lease_time;
	uint32_t lease_time_aligned = server_config.lease;
	struct in_addr addr;
	uint8_t *p_host_name;

	init_packet(&packet, oldpacket, DHCPACK);
	packet.yiaddr = yiaddr;

	lease_time = get_option(oldpacket, DHCP_LEASE_TIME);
	if (lease_time) {
		move_from_unaligned32(lease_time_aligned, lease_time);
		lease_time_aligned = ntohl(lease_time_aligned);
		if (lease_time_aligned > server_config.lease)
			lease_time_aligned = server_config.lease;
		else if (lease_time_aligned < server_config.min_lease)
			lease_time_aligned = server_config.min_lease;
	}

	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_aligned));

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);

	addr.s_addr = packet.yiaddr;
	bb_info_msg("Sending ACK to %s", inet_ntoa(addr));

	if (send_packet(&packet, 0) < 0)
		return -1;

	p_host_name = get_option(oldpacket, DHCP_HOST_NAME);
	add_lease(packet.chaddr, packet.yiaddr, lease_time_aligned, p_host_name);
	if (ENABLE_FEATURE_UDHCPD_WRITE_LEASES_EARLY) {
		/* rewrite the file with leases at every new acceptance */
		write_leases();
	}

	return 0;
}
Пример #2
0
int FAST_FUNC send_inform(struct dhcpMessage *oldpacket)
{
	struct dhcpMessage packet;
	struct option_set *curr;

	init_packet(&packet, oldpacket, DHCPACK);

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);

	return send_packet(&packet, 0);
}
Пример #3
0
int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr)
{
	struct dhcpMessage packet;
	struct option_set *curr;
	unsigned char *lease_time;
	u_int32_t lease_time_align = server_config.lease;
	struct in_addr addr;

	init_packet(&packet, oldpacket, DHCPACK);
	packet.yiaddr = yiaddr;
	
	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
		memcpy(&lease_time_align, lease_time, 4);
		lease_time_align = ntohl(lease_time_align);
		if (lease_time_align > server_config.lease) 
			lease_time_align = server_config.lease;
		else if (lease_time_align < server_config.min_lease) 
			lease_time_align = server_config.lease;
	}
	
	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
	
	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);

	addr.s_addr = packet.yiaddr;
	LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(addr));

	if (send_packet(&packet, 0) < 0) 
		return -1;

	add_lease(packet.chaddr, packet.yiaddr, lease_time_align);

	return 0;
}
Пример #4
0
int send_inform(struct dhcpMessage *oldpacket)
{
	struct dhcpMessage packet;
	struct option_set *curr;

	init_packet(&packet, oldpacket, DHCPACK);
	
	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);

	LOG(LOG_INFO, "sending INFORM to %02x:%02x:%02x:%02x:%02x:%02x",
	    packet.chaddr[0], packet.chaddr[1], packet.chaddr[2], 
	    packet.chaddr[3], packet.chaddr[4], packet.chaddr[5]);
	return send_packet(&packet, 0);
}
Пример #5
0
/* send a DHCP OFFER to a DHCP DISCOVER */
int sendOffer(struct dhcpMessage *oldpacket)
{
#ifdef DHCPD_HEAP_REPLACE_STACK
	struct dhcpMessage *packet;
#else
	struct dhcpMessage packet;
#endif
	struct dhcpOfferedAddr *lease = NULL;
	u_int32_t req_align, lease_time_align = server_config.lease;
	unsigned char *req, *lease_time;
	struct option_set *curr;
	//struct in_addr addr;

#ifdef DHCPD_HEAP_REPLACE_STACK
	packet = calloc(1,sizeof(struct dhcpMessage));
	if (!packet) {
		DHCPD_LOG(LOG_ERR, "Calloc failed...%d",__LINE__);
		return -1;
	}
	init_packet(packet, oldpacket, DHCPOFFER);
#else
	init_packet(&packet, oldpacket, DHCPOFFER);
#endif

	/* ADDME: if static, short circuit */
	/* the client is in our lease/offered table */
	if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) {
		if (!lease_expired(lease))
			lease_time_align = lease->expires - time(0);
#ifdef DHCPD_HEAP_REPLACE_STACK
		packet->yiaddr = lease->yiaddr;
#else
		packet.yiaddr = lease->yiaddr;
#endif
	/* Or the client has a requested ip */
	} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&

		   /* Don't look here (ugly hackish thing to do) */
		   memcpy(&req_align, req, 4) &&

		   /* and the ip is in the lease range */
		   ntohl(req_align) >= ntohl(server_config.start) &&
		   ntohl(req_align) <= ntohl(server_config.end) &&

		   /* and its not already taken/offered */ /* ADDME: check that its not a static lease */
		   ((!(lease = find_lease_by_yiaddr(req_align)) ||

		   /* or its taken, but expired */ /* ADDME: or maybe in here */
		   lease_expired(lease)))) {
#ifdef DHCPD_HEAP_REPLACE_STACK
				packet->yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
#else
				packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
#endif

	/* otherwise, find a free IP */ /*ADDME: is it a static lease? */
	} else {
#ifdef DHCPD_HEAP_REPLACE_STACK
		packet->yiaddr = find_address(0);
		/* try for an expired lease */
		if (!packet->yiaddr) packet->yiaddr = find_address(1);
#else
		packet.yiaddr = find_address(0);

		/* try for an expired lease */
		if (!packet.yiaddr) packet.yiaddr = find_address(1);
#endif
	}
#ifdef DHCPD_HEAP_REPLACE_STACK
	if(!(packet->yiaddr)) {
		if (packet != NULL)
			free(packet);

#else
	if(!packet.yiaddr) {
#endif
		DHCPD_LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
		return -1;
	}
#ifdef DHCPD_HEAP_REPLACE_STACK
	if (!add_lease(packet->chaddr, packet->yiaddr, server_config.offer_time)) {
		if (packet != NULL) {
			free(packet);
			packet = NULL;
		}
#else
	if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
#endif
		DHCPD_LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
		return -1;
	}

	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
		memcpy(&lease_time_align, lease_time, 4);
		lease_time_align = ntohl(lease_time_align);
		if (lease_time_align > server_config.lease)
			lease_time_align = server_config.lease;
	}

	/* Make sure we aren't just using the lease time from the previous offer */
	if (lease_time_align < server_config.min_lease)
		lease_time_align = server_config.lease;
	/* ADDME: end of short circuit */
#ifdef DHCPD_HEAP_REPLACE_STACK
	struct netif *netif = netif_find(server_config.interface);

	add_simple_option(packet->options, DHCP_LEASE_TIME, htonl(lease_time_align));
#ifdef __CONFIG_LWIP_V1
	add_simple_option(packet->options, DHCP_SUBNET, ip4_addr_get_u32(&netif->netmask));
	add_simple_option(packet->options, DHCP_ROUTER, ip4_addr_get_u32(&netif->gw));
	add_simple_option(packet->options, DHCP_DNS_SERVER, ip4_addr_get_u32(&netif->ip_addr));
#elif LWIP_IPV4 /* now only for IPv4 */
	add_simple_option(packet->options, DHCP_SUBNET, ip4_addr_get_u32(ip_2_ip4(&netif->netmask)));
	add_simple_option(packet->options, DHCP_ROUTER, ip4_addr_get_u32(ip_2_ip4(&netif->gw)));
	add_simple_option(packet->options, DHCP_DNS_SERVER, ip4_addr_get_u32(ip_2_ip4(&netif->ip_addr)));
#else
	#error "IPv4 not support!"
#endif

#else
	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
#endif

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
#ifdef DHCPD_HEAP_REPLACE_STACK
			add_option_string(packet->options, curr->data);
#else
			add_option_string(packet.options, curr->data);
#endif
		curr = curr->next;
	}
#ifdef DHCPD_HEAP_REPLACE_STACK
	add_bootp_options(packet);

	//addr.s_addr = packet->yiaddr;
	DHCPD_LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(packet->yiaddr));
	int ret = send_packet(packet, 0);
	if (packet != NULL) {
		free(packet);
		packet = NULL;
	}
	return ret;
#else
	add_bootp_options(&packet);

	addr.s_addr = packet.yiaddr;
	DHCPD_LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
	return send_packet(&packet, 0);
#endif
}


int sendNAK(struct dhcpMessage *oldpacket)
{
#ifdef DHCPD_HEAP_REPLACE_STACK
	struct dhcpMessage *packet;
#else
	struct dhcpMessage packet;
#endif
#ifdef DHCPD_HEAP_REPLACE_STACK
	packet = calloc(1,sizeof(struct dhcpMessage));
	if (!packet)
		DHCPD_LOG(LOG_ERR, "Calloc failed...%d",__LINE__);
	init_packet(packet, oldpacket, DHCPNAK);
#else
	init_packet(&packet, oldpacket, DHCPNAK);
#endif

	DEBUG(LOG_INFO, "sending NAK");
#ifdef DHCPD_HEAP_REPLACE_STACK
	int ret = send_packet(packet, 1);
	if (packet != NULL)
		free(packet);
	return ret;
#else
	return send_packet(&packet, 1);
#endif
}


int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr)
{
#ifdef DHCPD_HEAP_REPLACE_STACK
	struct dhcpMessage *packet;
#else
	struct dhcpMessage packet;
#endif
	struct option_set *curr;
	unsigned char *lease_time;
	u_int32_t lease_time_align = server_config.lease;
	//struct in_addr addr;

#ifdef DHCPD_HEAP_REPLACE_STACK
	packet = calloc(1,sizeof(struct dhcpMessage));
	if (!packet)
		DHCPD_LOG(LOG_ERR, "Calloc failed...%d",__LINE__);
	init_packet(packet, oldpacket, DHCPACK);
	packet->yiaddr = yiaddr;
#else
	init_packet(&packet, oldpacket, DHCPACK);

	packet.yiaddr = yiaddr;
#endif

	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
		memcpy(&lease_time_align, lease_time, 4);
		lease_time_align = ntohl(lease_time_align);
		if (lease_time_align > server_config.lease)
			lease_time_align = server_config.lease;
		else if (lease_time_align < server_config.min_lease)
			lease_time_align = server_config.lease;
	}
#ifdef DHCPD_HEAP_REPLACE_STACK
	struct netif *netif = netif_find(server_config.interface);

	add_simple_option(packet->options, DHCP_LEASE_TIME, htonl(lease_time_align));
#ifdef __CONFIG_LWIP_V1
	add_simple_option(packet->options, DHCP_SUBNET, ip4_addr_get_u32(&netif->netmask));
	add_simple_option(packet->options, DHCP_ROUTER, ip4_addr_get_u32(&netif->gw));
	add_simple_option(packet->options, DHCP_DNS_SERVER, ip4_addr_get_u32(&netif->ip_addr));
#elif LWIP_IPV4 /* now only for IPv4 */
	add_simple_option(packet->options, DHCP_SUBNET, ip4_addr_get_u32(ip_2_ip4(&netif->netmask)));
	add_simple_option(packet->options, DHCP_ROUTER, ip4_addr_get_u32(ip_2_ip4(&netif->gw)));
	add_simple_option(packet->options, DHCP_DNS_SERVER, ip4_addr_get_u32(ip_2_ip4(&netif->ip_addr)));
#else
	#error "IPv4 not support!"
#endif

#else
	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
#endif
	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
#ifdef DHCPD_HEAP_REPLACE_STACK
			add_option_string(packet->options, curr->data);
#else
			add_option_string(packet.options, curr->data);
#endif
		curr = curr->next;
	}
#ifdef DHCPD_HEAP_REPLACE_STACK
	add_bootp_options(packet);

	//addr.s_addr = packet->yiaddr;
	DHCPD_LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(packet->yiaddr));
	int ret = 0;
	if (send_packet(packet, 0) < 0)
		ret = -1;

	add_lease(packet->chaddr, packet->yiaddr, lease_time_align);

	if (packet)
		free(packet);
	return ret;
#else
	add_bootp_options(&packet);

	//addr.s_addr = packet.yiaddr;
	DHCPD_LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(packet->yiaddr));

	if (send_packet(&packet, 0) < 0)
		return -1;

	add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
	return 0;
#endif
}


int send_inform(struct dhcpMessage *oldpacket)
{
#ifdef DHCPD_HEAP_REPLACE_STACK
	struct dhcpMessage *packet;
#else
	struct dhcpMessage packet;
#endif
	struct option_set *curr;
#ifdef DHCPD_HEAP_REPLACE_STACK
	packet = calloc(1,sizeof(struct dhcpMessage));
	if (!packet)
		DHCPD_LOG(LOG_ERR, "Calloc failed...%d",__LINE__);
	init_packet(packet, oldpacket, DHCPACK);
#else
	init_packet(&packet, oldpacket, DHCPACK);
#endif

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
#ifdef DHCPD_HEAP_REPLACE_STACK
			add_option_string(packet->options, curr->data);
#else
			add_option_string(packet.options, curr->data);
#endif
		curr = curr->next;
	}
#ifdef DHCPD_HEAP_REPLACE_STACK
	add_bootp_options(packet);

	int ret = send_packet(packet, 0);
	if (packet)
		free(packet);
	return ret;
#else
	add_bootp_options(&packet);

	return send_packet(&packet, 0);
#endif
}
Пример #6
0
/* send a DHCP OFFER to a DHCP DISCOVER */
int FAST_FUNC send_offer(struct dhcpMessage *oldpacket)
{
	struct dhcpMessage packet;
	uint32_t req_align;
	uint32_t lease_time_aligned = server_config.lease;
	uint32_t static_lease_ip;
	uint8_t *req, *lease_time, *p_host_name;
	struct option_set *curr;
	struct in_addr addr;

	init_packet(&packet, oldpacket, DHCPOFFER);

	static_lease_ip = getIpByMac(server_config.static_leases, oldpacket->chaddr);

	/* ADDME: if static, short circuit */
	if (!static_lease_ip) {
		struct dhcpOfferedAddr *lease;

		lease = find_lease_by_chaddr(oldpacket->chaddr);
		/* the client is in our lease/offered table */
		if (lease) {
			signed_leasetime_t tmp = lease->expires - time(NULL);
			if (tmp >= 0)
				lease_time_aligned = tmp;
			packet.yiaddr = lease->yiaddr;
		/* Or the client has requested an ip */
		} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) != NULL
		 /* Don't look here (ugly hackish thing to do) */
		 && (move_from_unaligned32(req_align, req), 1)
		 /* and the ip is in the lease range */
		 && ntohl(req_align) >= server_config.start_ip
		 && ntohl(req_align) <= server_config.end_ip
		 /* and is not already taken/offered */
		 && (!(lease = find_lease_by_yiaddr(req_align))
			/* or its taken, but expired */
			|| lease_expired(lease))
		) {
			packet.yiaddr = req_align;
		/* otherwise, find a free IP */
		} else {
			packet.yiaddr = find_free_or_expired_address();
		}

		if (!packet.yiaddr) {
			bb_error_msg("no IP addresses to give - OFFER abandoned");
			return -1;
		}
		p_host_name = get_option(oldpacket, DHCP_HOST_NAME);
		if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time, p_host_name)) {
			bb_error_msg("lease pool is full - OFFER abandoned");
			return -1;
		}
		lease_time = get_option(oldpacket, DHCP_LEASE_TIME);
		if (lease_time) {
			move_from_unaligned32(lease_time_aligned, lease_time);
			lease_time_aligned = ntohl(lease_time_aligned);
			if (lease_time_aligned > server_config.lease)
				lease_time_aligned = server_config.lease;
		}

		/* Make sure we aren't just using the lease time from the previous offer */
		if (lease_time_aligned < server_config.min_lease)
			lease_time_aligned = server_config.min_lease;
	} else {
		/* It is a static lease... use it */
		packet.yiaddr = static_lease_ip;
	}

	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_aligned));

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);

	addr.s_addr = packet.yiaddr;
	bb_info_msg("Sending OFFER of %s", inet_ntoa(addr));
	return send_packet(&packet, 0);
}
Пример #7
0
int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr)
{
        struct dhcpMessage packet;
        struct option_set *curr;
        struct dhcpOfferedAddr *offerlist;
        char *lease_time, *vendorid, *userclsid;
        char length = 0;
        u_int32_t lease_time_align = cur_iface->lease;
        struct in_addr addr;
        //brcm begin
        char VIinfo[VENDOR_IDENTIFYING_INFO_LEN];
        char *req;
        int saveVIoptionNeeded = 0;
        //brcm end

        init_packet(&packet, oldpacket, DHCPACK);
        packet.yiaddr = yiaddr;
        
        if ((lease_time = (char *)get_option(oldpacket, DHCP_LEASE_TIME))) {
                memcpy(&lease_time_align, lease_time, 4);
                lease_time_align = ntohl(lease_time_align);
                if (lease_time_align > cur_iface->lease) 
                        lease_time_align = cur_iface->lease;
                else if (lease_time_align < server_config.min_lease) 
                        lease_time_align = cur_iface->lease;
        }

//<< jojopo : wifi leasetime 300 seconds , 2015/12/25
        if(isHostFromWireless(packet.chaddr))
            lease_time_align = 300;
//>> jojopo : end
        
        add_simple_option(packet.options, DHCP_LEASE_TIME, lease_time_align);
        
        curr = cur_iface->options;
        while (curr) {
                if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
                        add_option_string(packet.options, curr->data);
                curr = curr->next;
        }

        add_bootp_options(&packet);

        //brcm begin
        /* if DHCPRequest from client has device identity, send back gateway identity,
           and save the device identify */
        if ((req = (char *)get_option(oldpacket, DHCP_VENDOR_IDENTIFYING))) {
          if (createVIoption(VENDOR_IDENTIFYING_FOR_GATEWAY, VIinfo) != -1)
          {
            add_option_string(packet.options, (unsigned char *)VIinfo);
          }
          saveVIoptionNeeded = 1;
        }
        //brcm end

        addr.s_addr = packet.yiaddr;
        LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(addr));

        if (send_packet(&packet, 0) < 0) 
                return -1;

        add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
        offerlist = find_lease_by_chaddr(packet.chaddr);
        if (saveVIoptionNeeded)
        {
           saveVIoption(req,offerlist);
        }
        vendorid = (char *)get_option(oldpacket, DHCP_VENDOR);
        userclsid = (char *)get_option(oldpacket, DHCP_USER_CLASS_ID);
        memset(offerlist->classid, 0, sizeof(offerlist->classid));
        memset(offerlist->vendorid, 0, sizeof(offerlist->vendorid));
        if( vendorid != NULL){
 	     length = *(vendorid - 1);
	     memcpy(offerlist->vendorid, vendorid, (size_t)length);
	     offerlist->vendorid[(int)length] = '\0';
        }

        if( userclsid != NULL){
 	     length = *(userclsid - 1);
	     memcpy(offerlist->classid, userclsid, (size_t)length);
	     offerlist->classid[(int)length] = '\0';
        }

        return 0;
}
Пример #8
0
/* send a DHCP OFFER to a DHCP DISCOVER */
int sendOffer(struct dhcpMessage *oldpacket)
{
        struct dhcpMessage packet;
        struct dhcpOfferedAddr *lease = NULL;
        u_int32_t req_align, lease_time_align = cur_iface->lease;
        char *req, *lease_time;
        struct option_set *curr;
        struct in_addr addr;
	//For static IP lease
	uint32_t static_lease_ip;

        //brcm begin
        char VIinfo[VENDOR_IDENTIFYING_INFO_LEN];
        //brcm end

        init_packet(&packet, oldpacket, DHCPOFFER);
        
	//For static IP lease
	static_lease_ip = getIpByMac(cur_iface->static_leases,
		oldpacket->chaddr);

	if(!static_lease_ip) {
        	/* the client is in our lease/offered table */
        	if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) {
                	if (!lease_expired(lease)) 
                        	lease_time_align = lease->expires - time(0);
                	packet.yiaddr = lease->yiaddr;
        	/* Or the client has a requested ip */
        	} else if ((req = (char *)get_option(oldpacket, DHCP_REQUESTED_IP)) &&

			/* Don't look here (ugly hackish thing to do) */
			memcpy(&req_align, req, 4) && 

			/* and the ip is in the lease range */
			ntohl(req_align) >= ntohl(cur_iface->start) &&
			ntohl(req_align) <= ntohl(cur_iface->end) && 

			/* and its not already taken/offered */
			((!(lease = find_lease_by_yiaddr(req_align)) ||

			/* or its taken, but expired */
			lease_expired(lease)))) {
				packet.yiaddr = req_align; 

		/* otherwise, find a free IP */
        	} else {
                	packet.yiaddr = find_address(0);
                
                	/* try for an expired lease */
			if (!packet.yiaddr) packet.yiaddr = find_address(1);
        	}
        
        	if(!packet.yiaddr) {
                	LOG(LOG_WARNING, "no IP addresses to give -- "
				"OFFER abandoned");
                	return -1;
        	}
        
        	if (!add_lease(packet.chaddr, packet.yiaddr,
			server_config.offer_time)) {
                	LOG(LOG_WARNING, "lease pool is full -- "
				"OFFER abandoned");
                	return -1;
        	}               

        	if ((lease_time = (char *)get_option(oldpacket, DHCP_LEASE_TIME))) {
                	memcpy(&lease_time_align, lease_time, 4);
                	lease_time_align = ntohl(lease_time_align);
                	if (lease_time_align > cur_iface->lease) 
                        	lease_time_align = cur_iface->lease;
        	}

        	/* Make sure we aren't just using the lease time from the
		 * previous offer */
        	if (lease_time_align < server_config.min_lease) 
                	lease_time_align = cur_iface->lease;

//<< jojopo : wifi leasetime 300 seconds , 2015/12/25
         if(isHostFromWireless(packet.chaddr))
            lease_time_align = 300;
//>> jojopo : end
	} else {
		/* It is a static lease... use it */
		packet.yiaddr = static_lease_ip;
	}
                
        add_simple_option(packet.options, DHCP_LEASE_TIME, lease_time_align);

        curr = cur_iface->options;
        while (curr) {
                if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
                        add_option_string(packet.options, curr->data);
                curr = curr->next;
        }

        add_bootp_options(&packet);

        //brcm begin
        /* if DHCPDISCOVER from client has device identity, send back gateway identity */
        if ((req = (char *)get_option(oldpacket, DHCP_VENDOR_IDENTIFYING))) {
          if (createVIoption(VENDOR_IDENTIFYING_FOR_GATEWAY, VIinfo) != -1)
            add_option_string(packet.options, (unsigned char *)VIinfo);
        }
        //brcm end

        addr.s_addr = packet.yiaddr;
        LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
        return send_packet(&packet, 0);
}
Пример #9
0
/* send a DHCP OFFER to a DHCP DISCOVER */
int send_offer(struct dhcpMessage *oldpacket)
{
	struct dhcpMessage packet;
	struct dhcpOfferedAddr *lease = NULL;
	uint32_t req_align, lease_time_align = server_config.lease;
	uint8_t *req, *lease_time;
	struct option_set *curr;
	struct in_addr addr;

	uint32_t static_lease_ip;

	init_packet(&packet, oldpacket, DHCPOFFER);

	static_lease_ip = getIpByMac(server_config.static_leases, oldpacket->chaddr);

	/* ADDME: if static, short circuit */
	if (!static_lease_ip) {
		/* the client is in our lease/offered table */
		lease = find_lease_by_chaddr(oldpacket->chaddr);
		if (lease) {
			if (!lease_expired(lease))
				lease_time_align = lease->expires - time(0);
			packet.yiaddr = lease->yiaddr;
		/* Or the client has a requested ip */
		} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP))
		 /* Don't look here (ugly hackish thing to do) */
		 && memcpy(&req_align, req, 4)
		 /* and the ip is in the lease range */
		 && ntohl(req_align) >= server_config.start_ip
		 && ntohl(req_align) <= server_config.end_ip
		 && !static_lease_ip /* Check that its not a static lease */
		 /* and is not already taken/offered */
		 && (!(lease = find_lease_by_yiaddr(req_align))
			/* or its taken, but expired */ /* ADDME: or maybe in here */
			|| lease_expired(lease))
		) {
			packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
			/* otherwise, find a free IP */
		} else {
			/* Is it a static lease? (No, because find_address skips static lease) */
			packet.yiaddr = find_address(0);
			/* try for an expired lease */
			if (!packet.yiaddr)
				packet.yiaddr = find_address(1);
		}

		if (!packet.yiaddr) {
			bb_error_msg("no IP addresses to give - OFFER abandoned");
			return -1;
		}
		if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
			bb_error_msg("lease pool is full - OFFER abandoned");
			return -1;
		}
		lease_time = get_option(oldpacket, DHCP_LEASE_TIME);
		if (lease_time) {
			memcpy(&lease_time_align, lease_time, 4);
			lease_time_align = ntohl(lease_time_align);
			if (lease_time_align > server_config.lease)
				lease_time_align = server_config.lease;
		}

		/* Make sure we aren't just using the lease time from the previous offer */
		if (lease_time_align < server_config.min_lease)
			lease_time_align = server_config.lease;
		/* ADDME: end of short circuit */
	} else {
		/* It is a static lease... use it */
		packet.yiaddr = static_lease_ip;
	}

	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);

	addr.s_addr = packet.yiaddr;
	bb_info_msg("Sending OFFER of %s", inet_ntoa(addr));
	return send_packet(&packet, 0);
}
Пример #10
0
int sendACK(struct dhcpMessage *oldpacket, u_int32_t yiaddr)
{
	struct dhcpMessage packet;
	struct option_set *curr;
	unsigned char *lease_time;
	
	// added start Bob Guo 11/15/2006
	FILE *fp;
	unsigned char *client_mac, *client_ip;
	char logBuffer[96];
	// added end Bob Guo 11/15/2006
	
	u_int32_t lease_time_align = server_config.lease;
	struct in_addr addr;

	init_packet(&packet, oldpacket, DHCPACK);
	packet.yiaddr = yiaddr;
	
	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
		memcpy(&lease_time_align, lease_time, 4);
		lease_time_align = ntohl(lease_time_align);
		if (lease_time_align > server_config.lease) 
			lease_time_align = server_config.lease;
		else if (lease_time_align < server_config.min_lease) 
			lease_time_align = server_config.lease;
	}

	/* For guest network clients, set lease time to 30 minutes */
	if (is_guest_network(packet.chaddr)) {
		lease_time_align = GUEST_LEASE_TIME;
		DEBUG(LOG_INFO, "send ACK to guest network client with lease time %d sec", GUEST_LEASE_TIME);
	}

	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));
	
	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);

	addr.s_addr = packet.yiaddr;
	LOG(LOG_INFO, "sending ACK to %s", inet_ntoa(addr));

	if (send_packet(&packet, 0) < 0) 
		return -1;

	add_lease(packet.chaddr, packet.yiaddr, lease_time_align);
	// added start Bob Guo 11/15/2006
	client_mac = (unsigned char *)packet.chaddr;
	client_ip = (unsigned char *)&packet.yiaddr;
	sprintf(logBuffer, "[DHCP IP: (%d.%d.%d.%d)] to MAC address %02X:%02X:%02X:%02X:%02X:%02X,",
	                                          *client_ip, *(client_ip+1), *(client_ip+2), *(client_ip+3),
	                                          *client_mac, *(client_mac+1), *(client_mac+2), *(client_mac+3), *(client_mac+4), *(client_mac+5));
	if ((fp = fopen("/dev/aglog", "r+")) != NULL)
  {
        fwrite(logBuffer, sizeof(char), strlen(logBuffer)+1, fp);
        fclose(fp);
  }	
	// added end Bob Guo 11/15/2006

	return 0;
}
Пример #11
0
/* send a DHCP OFFER to a DHCP DISCOVER */
int sendOffer(struct dhcpMessage *oldpacket)
{
	struct dhcpMessage packet;
	struct dhcpOfferedAddr *lease = NULL;
	u_int32_t req_align, lease_time_align = server_config.lease;
	unsigned char *req, *lease_time;
	struct option_set *curr;
	struct in_addr addr;
    unsigned char mac[6];
	u_int32_t reserved_ip;

    memcpy(mac, oldpacket->chaddr, 6);
    
	init_packet(&packet, oldpacket, DHCPOFFER);
	
	/* ADDME: if static, short circuit */
	/* the client is in our lease/offered table */
	if ((lease = find_lease_by_chaddr(oldpacket->chaddr)) &&
        
        /* Make sure the IP is not already used on network */
        !check_ip(lease->yiaddr)) {

		if (!lease_expired(lease)) 
			lease_time_align = lease->expires - time(0);
		packet.yiaddr = lease->yiaddr;
		
    /* Find a reserved ip for this MAC */
	} else if ( (reserved_ip = find_reserved_ip(mac)) != 0) {
		packet.yiaddr = htonl(reserved_ip);
        
	/* Or the client has a requested ip */
	} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&

		/* Don't look here (ugly hackish thing to do) */
		memcpy(&req_align, req, 4) &&

        /* check if the requested ip has been reserved */
        check_reserved_ip(req_align, mac) &&
           
		/* and the ip is in the lease range */
		ntohl(req_align) >= ntohl(server_config.start) &&
		ntohl(req_align) <= ntohl(server_config.end) &&

         /* Check that this request ip is not on network */
         //!check_ip(ntohl(req_align)) &&
	 /* the input parameter of check_ip() should be network order */
	 !check_ip(req_align) && /*  modified by Max Ding, 07/07/2011 @TD #42 of WNR3500Lv2 */
           
		/* and its not already taken/offered */ /* ADDME: check that its not a static lease */
		((!(lease = find_lease_by_yiaddr(req_align)) ||
		   
		/* or its taken, but expired */ /* ADDME: or maybe in here */
		lease_expired(lease)))) {
		    packet.yiaddr = req_align; 

	/* otherwise, find a free IP */ /*ADDME: is it a static lease? */
	} else {
		packet.yiaddr = find_address2(0, mac);
		
		/* try for an expired lease */
		if (!packet.yiaddr) packet.yiaddr = find_address2(1, mac);
	}
	
	if(!packet.yiaddr) {
		LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
		return -1;
	}
	
	if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
		LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
		return -1;
	}		

	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
		memcpy(&lease_time_align, lease_time, 4);
		lease_time_align = ntohl(lease_time_align);
		if (lease_time_align > server_config.lease) 
			lease_time_align = server_config.lease;
	}

	/* Make sure we aren't just using the lease time from the previous offer */
	if (lease_time_align < server_config.min_lease) 
		lease_time_align = server_config.lease;

	/* For guest network clients, set lease time to 30 minutes */
	if (is_guest_network(mac)) {
		lease_time_align = GUEST_LEASE_TIME;
		DEBUG(LOG_INFO, "send OFFER to guest network client with lease time %d sec", GUEST_LEASE_TIME);
	}

	/* ADDME: end of short circuit */		
	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);
	
	addr.s_addr = packet.yiaddr;
	LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
	return send_packet(&packet, 0);
}
Пример #12
0
/* send a DHCP OFFER to a DHCP DISCOVER */
int sendOffer(struct dhcpMessage *oldpacket)
{
	struct dhcpMessage packet;
	struct dhcpOfferedAddr *lease = NULL;
	u_int32_t req_align, lease_time_align = server_config.lease;
	unsigned char *req, *lease_time;
	struct option_set *curr;
	struct in_addr addr;

	init_packet(&packet, oldpacket, DHCPOFFER);
	
	/* ADDME: if static, short circuit */
	/* the client is in our lease/offered table */
	if ((lease = find_lease_by_chaddr(oldpacket->chaddr))) {
		if (!lease_expired(lease)) 
			lease_time_align = lease->expires - time(0);
		packet.yiaddr = lease->yiaddr;
		
	/* Or the client has a requested ip */
	} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&

		   /* Don't look here (ugly hackish thing to do) */
		   memcpy(&req_align, req, 4) &&

		   /* and the ip is in the lease range */
		   ntohl(req_align) >= ntohl(server_config.start) &&
		   ntohl(req_align) <= ntohl(server_config.end) &&
		   
		   /* and its not already taken/offered */ /* ADDME: check that its not a static lease */
		   ((!(lease = find_lease_by_yiaddr(req_align)) ||
		   
		   /* or its taken, but expired */ /* ADDME: or maybe in here */
		   lease_expired(lease)))) {
				packet.yiaddr = req_align;

	/* otherwise, find a free IP */ /*ADDME: is it a static lease? */
	} else {
		packet.yiaddr = find_address(0);
		
		/* try for an expired lease */
		if (!packet.yiaddr) packet.yiaddr = find_address(1);
	}
	
	if(!packet.yiaddr) {
		LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
		return -1;
	}
	
	if (!add_lease(packet.chaddr, packet.yiaddr, server_config.offer_time)) {
		LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
		return -1;
	}		

	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
		memcpy(&lease_time_align, lease_time, 4);
		lease_time_align = ntohl(lease_time_align);
		if (lease_time_align > server_config.lease) 
			lease_time_align = server_config.lease;
	}

	/* Make sure we aren't just using the lease time from the previous offer */
	if (lease_time_align < server_config.min_lease) 
		lease_time_align = server_config.lease;
	/* ADDME: end of short circuit */		
	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);
	
	addr.s_addr = packet.yiaddr;
	LOG(LOG_INFO, "sending OFFER of %s", inet_ntoa(addr));
	return send_packet(&packet, 0);
}
Пример #13
0
/* send a DHCP OFFER to a DHCP DISCOVER */
int sendOffer(struct dhcpMessage *oldpacket, struct dhcpOfferedAddr *lease)
{
	struct dhcpMessage packet;
	u_int32_t req_align, lease_time_align = server_config.lease;
	unsigned char *req, *lease_time;
	struct option_set *curr;
	struct in_addr addr;
	unsigned long offer_time = server_config.offer_time;

	init_packet(&packet, oldpacket, DHCPOFFER);
	
	/* ADDME: if static, short circuit */
	/* the client is in our lease/offered table */
	if (lease) {
#ifdef MY_DEBUG
	LOG(LOG_DEBUG,"(1)the client is in our lease/offered table");
#endif
		if(lease->expires == EXPIRES_NEVER) {
			/* static lease */
			packet.yiaddr = lease->yiaddr;
			offer_time = EXPIRES_NEVER; /* offer infinite time */
		} else if(!check_ip(lease->yiaddr)){	// Confirm the ip isn't used by someone, by honor
			if (!lease_expired(lease)) 
				lease_time_align = lease->expires - get_time(0);
			else
				goto find_ip;
			packet.yiaddr = lease->yiaddr;
		}
		else
			goto find_ip;
		
	/* Or the client has a requested ip */
	} else if ((req = get_option(oldpacket, DHCP_REQUESTED_IP)) &&

		   /* Don't look here (ugly hackish thing to do) */
		   memcpy(&req_align, req, 4) &&

		   /* and the ip is in the lease range */
		   ntohl(req_align) >= ntohl(server_config.start) &&
		   ntohl(req_align) <= ntohl(server_config.end) &&
		   
		   /* and its not already taken/offered */ /* ADDME: check that its not a static lease */
		   ((!(lease = find_lease_by_yiaddr(req_align)) ||
		   
		   /* or its taken, but expired */ /* ADDME: or maybe in here */
		   lease_expired(lease)))) {
#ifdef MY_DEBUG
	LOG(LOG_DEBUG,"(2)the client has a requested ip");
#endif
		if(req_align == server_config.server)   // The request ip cann't be router ip, by honor
			goto find_ip;
		else if(!check_ip(req_align))		// Confirm the ip isn't used by someone, by honor
			packet.yiaddr = req_align; /* FIXME: oh my, is there a host using this IP? */
		else
			goto find_ip;

	/* otherwise, find a free IP */ /*ADDME: is it a static lease? */
	} else {
find_ip:	// by honor
#ifdef MY_DEBUG
	LOG(LOG_DEBUG,"(3)find a free IP");
#endif
		packet.yiaddr = find_address(0);
		
		/* try for an expired lease */
		if (!packet.yiaddr) packet.yiaddr = find_address(1);
	}
	
	if(!packet.yiaddr) {
		LOG(LOG_WARNING, "no IP addresses to give -- OFFER abandoned");
		return -1;
	}
	
	if (!add_lease(packet.chaddr, packet.yiaddr, offer_time)) {
		LOG(LOG_WARNING, "lease pool is full -- OFFER abandoned");
		return -1;
	}

	if ((lease_time = get_option(oldpacket, DHCP_LEASE_TIME))) {
		memcpy(&lease_time_align, lease_time, 4);
		lease_time_align = ntohl(lease_time_align);
		if (lease_time_align > server_config.lease) 
			lease_time_align = server_config.lease;
	}

	/* Make sure we aren't just using the lease time from the previous offer */
	if (lease_time_align < server_config.min_lease) 
		lease_time_align = server_config.lease;
	/* ADDME: end of short circuit */	
	add_simple_option(packet.options, DHCP_LEASE_TIME, htonl(lease_time_align));

	curr = server_config.options;
	while (curr) {
		if (curr->data[OPT_CODE] != DHCP_LEASE_TIME)
			add_option_string(packet.options, curr->data);
		curr = curr->next;
	}

	add_bootp_options(&packet);
	
	addr.s_addr = packet.yiaddr;
	LOG(LOG_INFO, "broadcasting OFFER of %s to %02x:%02x:%02x:%02x:%02x:%02x", inet_ntoa(addr),
	    packet.chaddr[0], packet.chaddr[1], packet.chaddr[2], 
	    packet.chaddr[3], packet.chaddr[4], packet.chaddr[5]);
	return send_packet(&packet, 1);		// Send broadcast rather than unicast, by honor
}