1120 lines
33 KiB
C
1120 lines
33 KiB
C
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//#include "esp_common.h"
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#include <stdlib.h>
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#include <string.h>
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#include "lwip/inet.h"
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#include "lwip/err.h"
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#include "lwip/pbuf.h"
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#include "lwip/udp.h"
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#include "lwip/mem.h"
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#include "lwip/ip_addr.h"
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#include "tcpip_adapter.h"
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#include "apps/dhcpserver.h"
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#ifdef LWIP_ESP8266
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#define BOOTP_BROADCAST 0x8000
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#define DHCP_REQUEST 1
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#define DHCP_REPLY 2
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#define DHCP_HTYPE_ETHERNET 1
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#define DHCP_HLEN_ETHERNET 6
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#define DHCP_MSG_LEN 236
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#define DHCPS_SERVER_PORT 67
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#define DHCPS_CLIENT_PORT 68
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#define DHCPDISCOVER 1
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#define DHCPOFFER 2
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#define DHCPREQUEST 3
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#define DHCPDECLINE 4
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#define DHCPACK 5
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#define DHCPNAK 6
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#define DHCPRELEASE 7
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#define DHCP_OPTION_SUBNET_MASK 1
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#define DHCP_OPTION_ROUTER 3
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#define DHCP_OPTION_DNS_SERVER 6
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#define DHCP_OPTION_REQ_IPADDR 50
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#define DHCP_OPTION_LEASE_TIME 51
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#define DHCP_OPTION_MSG_TYPE 53
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#define DHCP_OPTION_SERVER_ID 54
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#define DHCP_OPTION_INTERFACE_MTU 26
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#define DHCP_OPTION_PERFORM_ROUTER_DISCOVERY 31
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#define DHCP_OPTION_BROADCAST_ADDRESS 28
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#define DHCP_OPTION_REQ_LIST 55
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#define DHCP_OPTION_END 255
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//#define USE_CLASS_B_NET 1
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#define DHCPS_DEBUG 0
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#define DHCPS_LOG printf
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#define MAX_STATION_NUM 8
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#define DHCPS_STATE_OFFER 1
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#define DHCPS_STATE_DECLINE 2
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#define DHCPS_STATE_ACK 3
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#define DHCPS_STATE_NAK 4
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#define DHCPS_STATE_IDLE 5
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#define DHCPS_STATE_RELEASE 6
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#ifdef MEMLEAK_DEBUG
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static const char mem_debug_file[] ICACHE_RODATA_ATTR STORE_ATTR = __FILE__;
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#endif
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////////////////////////////////////////////////////////////////////////////////////
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static const u32_t magic_cookie = 0x63538263;
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static struct udp_pcb *pcb_dhcps = NULL;
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static ip4_addr_t broadcast_dhcps;
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static ip4_addr_t server_address;
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static ip4_addr_t client_address; //added
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static ip4_addr_t client_address_plus;
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static list_node *plist = NULL;
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static bool renew = false;
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static dhcps_lease_t dhcps_poll;
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static dhcps_offer_t dhcps_offer = 0xFF;
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static dhcps_time_t dhcps_lease_time = DHCPS_LEASE_TIME_DEF; //minute
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/******************************************************************************
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* FunctionName : dhcps_option_info
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* Description : get the DHCP message option info
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* Parameters : op_id -- DHCP message option id
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* opt_len -- DHCP message option length
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* Returns : DHCP message option addr
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*******************************************************************************/
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void *dhcps_option_info(u8_t op_id, u32_t opt_len)
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{
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void* option_arg = NULL;
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switch (op_id){
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case IP_ADDRESS_LEASE_TIME:
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if (opt_len == sizeof(dhcps_time_t))
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option_arg = &dhcps_lease_time;
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break;
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case REQUESTED_IP_ADDRESS:
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if (opt_len == sizeof(dhcps_lease_t))
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option_arg = &dhcps_poll;
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break;
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case ROUTER_SOLICITATION_ADDRESS:
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if (opt_len == sizeof(dhcps_offer_t))
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option_arg = &dhcps_offer;
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break;
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default:
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break;
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}
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return option_arg;
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}
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/******************************************************************************
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* FunctionName : node_insert_to_list
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* Description : insert the node to the list
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* Parameters : phead -- the head node of the list
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* pinsert -- the insert node of the list
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* Returns : none
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*******************************************************************************/
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void node_insert_to_list(list_node **phead, list_node* pinsert)
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{
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list_node *plist = NULL;
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struct dhcps_pool *pdhcps_pool = NULL;
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struct dhcps_pool *pdhcps_node = NULL;
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if (*phead == NULL)
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*phead = pinsert;
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else {
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plist = *phead;
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pdhcps_node = pinsert->pnode;
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pdhcps_pool = plist->pnode;
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if(pdhcps_node->ip.addr < pdhcps_pool->ip.addr) {
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pinsert->pnext = plist;
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*phead = pinsert;
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} else {
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while (plist->pnext != NULL) {
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pdhcps_pool = plist->pnext->pnode;
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if (pdhcps_node->ip.addr < pdhcps_pool->ip.addr) {
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pinsert->pnext = plist->pnext;
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plist->pnext = pinsert;
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break;
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}
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plist = plist->pnext;
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}
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if(plist->pnext == NULL) {
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plist->pnext = pinsert;
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}
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}
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}
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// pinsert->pnext = NULL;
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}
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/******************************************************************************
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* FunctionName : node_delete_from_list
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* Description : remove the node from list
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* Parameters : phead -- the head node of the list
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* pdelete -- the remove node of the list
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* Returns : none
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*******************************************************************************/
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void node_remove_from_list(list_node **phead, list_node* pdelete)
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{
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list_node *plist = NULL;
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plist = *phead;
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if (plist == NULL){
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*phead = NULL;
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} else {
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if (plist == pdelete){
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*phead = plist->pnext;
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pdelete->pnext = NULL;
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} else {
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while (plist != NULL) {
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if (plist->pnext == pdelete){
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plist->pnext = pdelete->pnext;
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pdelete->pnext = NULL;
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}
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plist = plist->pnext;
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}
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}
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}
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}
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/******************************************************************************
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* FunctionName : add_msg_type
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* Description : add TYPE option of DHCP message
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* Parameters : optptr -- the addr of DHCP message option
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* Returns : the addr of DHCP message option
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*******************************************************************************/
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static u8_t* add_msg_type(u8_t *optptr, u8_t type)
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{
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*optptr++ = DHCP_OPTION_MSG_TYPE;
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*optptr++ = 1;
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*optptr++ = type;
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return optptr;
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}
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/******************************************************************************
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* FunctionName : add_offer_options
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* Description : add OFFER option of DHCP message
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* Parameters : optptr -- the addr of DHCP message option
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* Returns : the addr of DHCP message option
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*******************************************************************************/
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static u8_t* add_offer_options(u8_t *optptr)
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{
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ip4_addr_t ipadd;
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ipadd.addr = *( (u32_t *) &server_address);
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#ifdef USE_CLASS_B_NET
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*optptr++ = DHCP_OPTION_SUBNET_MASK;
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*optptr++ = 4; //length
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*optptr++ = 255;
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*optptr++ = 240;
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*optptr++ = 0;
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*optptr++ = 0;
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#else
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*optptr++ = DHCP_OPTION_SUBNET_MASK;
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*optptr++ = 4;
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*optptr++ = 255;
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*optptr++ = 255;
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*optptr++ = 255;
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*optptr++ = 0;
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#endif
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*optptr++ = DHCP_OPTION_LEASE_TIME;
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*optptr++ = 4;
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*optptr++ = ((dhcps_lease_time * 60) >> 24) & 0xFF;
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*optptr++ = ((dhcps_lease_time * 60) >> 16) & 0xFF;
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*optptr++ = ((dhcps_lease_time * 60) >> 8) & 0xFF;
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*optptr++ = ((dhcps_lease_time * 60) >> 0) & 0xFF;
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*optptr++ = DHCP_OPTION_SERVER_ID;
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*optptr++ = 4;
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*optptr++ = ip4_addr1( &ipadd);
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*optptr++ = ip4_addr2( &ipadd);
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*optptr++ = ip4_addr3( &ipadd);
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*optptr++ = ip4_addr4( &ipadd);
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if (dhcps_router_enabled(dhcps_offer)){
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struct ip_info if_ip;
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//bzero(&if_ip, sizeof(struct ip_info));
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memset(&if_ip ,0x00, sizeof(struct ip_info));
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tcpip_adapter_get_ip_info(WIFI_IF_AP, &if_ip);
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*optptr++ = DHCP_OPTION_ROUTER;
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*optptr++ = 4;
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*optptr++ = ip4_addr1( &if_ip.gw);
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*optptr++ = ip4_addr2( &if_ip.gw);
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*optptr++ = ip4_addr3( &if_ip.gw);
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*optptr++ = ip4_addr4( &if_ip.gw);
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}
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#ifdef USE_DNS
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*optptr++ = DHCP_OPTION_DNS_SERVER;
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*optptr++ = 4;
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*optptr++ = ip4_addr1( &ipadd);
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*optptr++ = ip4_addr2( &ipadd);
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*optptr++ = ip4_addr3( &ipadd);
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*optptr++ = ip4_addr4( &ipadd);
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#endif
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#ifdef CLASS_B_NET
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*optptr++ = DHCP_OPTION_BROADCAST_ADDRESS;
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*optptr++ = 4;
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*optptr++ = ip4_addr1( &ipadd);
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*optptr++ = 255;
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*optptr++ = 255;
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*optptr++ = 255;
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#else
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*optptr++ = DHCP_OPTION_BROADCAST_ADDRESS;
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*optptr++ = 4;
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*optptr++ = ip4_addr1( &ipadd);
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*optptr++ = ip4_addr2( &ipadd);
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*optptr++ = ip4_addr3( &ipadd);
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*optptr++ = 255;
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#endif
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*optptr++ = DHCP_OPTION_INTERFACE_MTU;
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*optptr++ = 2;
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#ifdef CLASS_B_NET
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*optptr++ = 0x05;
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*optptr++ = 0xdc;
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#else
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*optptr++ = 0x02;
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*optptr++ = 0x40;
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#endif
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*optptr++ = DHCP_OPTION_PERFORM_ROUTER_DISCOVERY;
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*optptr++ = 1;
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*optptr++ = 0x00;
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*optptr++ = 43;
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*optptr++ = 6;
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*optptr++ = 0x01;
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*optptr++ = 4;
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*optptr++ = 0x00;
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*optptr++ = 0x00;
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*optptr++ = 0x00;
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*optptr++ = 0x02;
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return optptr;
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}
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/******************************************************************************
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* FunctionName : add_end
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* Description : add end option of DHCP message
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* Parameters : optptr -- the addr of DHCP message option
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* Returns : the addr of DHCP message option
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*******************************************************************************/
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static u8_t* add_end(u8_t *optptr)
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{
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*optptr++ = DHCP_OPTION_END;
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return optptr;
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}
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/******************************************************************************
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* FunctionName : create_msg
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* Description : create response message
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* Parameters : m -- DHCP message info
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* Returns : none
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*******************************************************************************/
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static void create_msg(struct dhcps_msg *m)
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{
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ip4_addr_t client;
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client.addr = *( (uint32_t *) &client_address);
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m->op = DHCP_REPLY;
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m->htype = DHCP_HTYPE_ETHERNET;
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m->hlen = 6;
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m->hops = 0;
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// os_memcpy((char *) xid, (char *) m->xid, sizeof(m->xid));
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m->secs = 0;
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m->flags = htons(BOOTP_BROADCAST);
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memcpy((char *) m->yiaddr, (char *) &client.addr, sizeof(m->yiaddr));
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memset((char *) m->ciaddr, 0, sizeof(m->ciaddr));
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memset((char *) m->siaddr, 0, sizeof(m->siaddr));
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memset((char *) m->giaddr, 0, sizeof(m->giaddr));
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memset((char *) m->sname, 0, sizeof(m->sname));
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memset((char *) m->file, 0, sizeof(m->file));
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memset((char *) m->options, 0, sizeof(m->options));
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u32_t magic_cookie_temp = magic_cookie;
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memcpy((char *) m->options, &magic_cookie_temp, sizeof(magic_cookie_temp));
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}
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/******************************************************************************
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* FunctionName : send_offer
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* Description : DHCP message OFFER Response
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* Parameters : m -- DHCP message info
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* Returns : none
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*******************************************************************************/
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static void send_offer(struct dhcps_msg *m)
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{
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u8_t *end;
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struct pbuf *p, *q;
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u8_t *data;
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u16_t cnt=0;
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u16_t i;
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err_t SendOffer_err_t;
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create_msg(m);
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end = add_msg_type(&m->options[4], DHCPOFFER);
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end = add_offer_options(end);
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end = add_end(end);
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p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcps_msg), PBUF_RAM);
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#if DHCPS_DEBUG
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DHCPS_LOG("udhcp: send_offer>>p->ref = %d\n", p->ref);
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#endif
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if(p != NULL){
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#if DHCPS_DEBUG
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DHCPS_LOG("dhcps: send_offer>>pbuf_alloc succeed\n");
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DHCPS_LOG("dhcps: send_offer>>p->tot_len = %d\n", p->tot_len);
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DHCPS_LOG("dhcps: send_offer>>p->len = %d\n", p->len);
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#endif
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q = p;
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while(q != NULL){
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data = (u8_t *)q->payload;
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for(i=0; i<q->len; i++)
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{
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data[i] = ((u8_t *) m)[cnt++];
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#if DHCPS_DEBUG
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DHCPS_LOG("%02x ",data[i]);
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if((i+1)%16 == 0){
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DHCPS_LOG("\n");
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}
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#endif
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}
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q = q->next;
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}
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}else{
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#if DHCPS_DEBUG
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DHCPS_LOG("dhcps: send_offer>>pbuf_alloc failed\n");
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#endif
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return;
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}
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ip_addr_t ip_temp = IPADDR4_INIT(0x0);
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ip4_addr_set(ip_2_ip4(&ip_temp), &broadcast_dhcps);
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SendOffer_err_t = udp_sendto( pcb_dhcps, p, &ip_temp, DHCPS_CLIENT_PORT );
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#if DHCPS_DEBUG
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DHCPS_LOG("dhcps: send_offer>>udp_sendto result %x\n",SendOffer_err_t);
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#endif
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if(p->ref != 0){
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#if DHCPS_DEBUG
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DHCPS_LOG("udhcp: send_offer>>free pbuf\n");
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#endif
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pbuf_free(p);
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}
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}
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/******************************************************************************
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* FunctionName : send_nak
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* Description : DHCP message NACK Response
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* Parameters : m -- DHCP message info
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* Returns : none
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*******************************************************************************/
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static void send_nak(struct dhcps_msg *m)
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{
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u8_t *end;
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struct pbuf *p, *q;
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u8_t *data;
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u16_t cnt=0;
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u16_t i;
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err_t SendNak_err_t;
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create_msg(m);
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end = add_msg_type(&m->options[4], DHCPNAK);
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end = add_end(end);
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p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcps_msg), PBUF_RAM);
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#if DHCPS_DEBUG
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DHCPS_LOG("udhcp: send_nak>>p->ref = %d\n", p->ref);
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#endif
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if(p != NULL){
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#if DHCPS_DEBUG
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DHCPS_LOG("dhcps: send_nak>>pbuf_alloc succeed\n");
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DHCPS_LOG("dhcps: send_nak>>p->tot_len = %d\n", p->tot_len);
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DHCPS_LOG("dhcps: send_nak>>p->len = %d\n", p->len);
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#endif
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q = p;
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while(q != NULL){
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data = (u8_t *)q->payload;
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for(i=0; i<q->len; i++)
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{
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data[i] = ((u8_t *) m)[cnt++];
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#if DHCPS_DEBUG
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DHCPS_LOG("%02x ",data[i]);
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if((i+1)%16 == 0){
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DHCPS_LOG("\n");
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}
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#endif
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}
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q = q->next;
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}
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}else{
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#if DHCPS_DEBUG
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DHCPS_LOG("dhcps: send_nak>>pbuf_alloc failed\n");
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#endif
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return;
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}
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ip_addr_t ip_temp = IPADDR4_INIT(0x0);
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ip4_addr_set(ip_2_ip4(&ip_temp), &broadcast_dhcps);
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SendNak_err_t = udp_sendto( pcb_dhcps, p, &ip_temp, DHCPS_CLIENT_PORT );
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#if DHCPS_DEBUG
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DHCPS_LOG("dhcps: send_nak>>udp_sendto result %x\n",SendNak_err_t);
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#endif
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if(p->ref != 0){
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#if DHCPS_DEBUG
|
|
DHCPS_LOG("udhcp: send_nak>>free pbuf\n");
|
|
#endif
|
|
pbuf_free(p);
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : send_ack
|
|
* Description : DHCP message ACK Response
|
|
* Parameters : m -- DHCP message info
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
static void send_ack(struct dhcps_msg *m)
|
|
{
|
|
u8_t *end;
|
|
struct pbuf *p, *q;
|
|
u8_t *data;
|
|
u16_t cnt=0;
|
|
u16_t i;
|
|
err_t SendAck_err_t;
|
|
create_msg(m);
|
|
|
|
end = add_msg_type(&m->options[4], DHCPACK);
|
|
end = add_offer_options(end);
|
|
end = add_end(end);
|
|
|
|
p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcps_msg), PBUF_RAM);
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("udhcp: send_ack>>p->ref = %d\n", p->ref);
|
|
#endif
|
|
if(p != NULL){
|
|
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: send_ack>>pbuf_alloc succeed\n");
|
|
DHCPS_LOG("dhcps: send_ack>>p->tot_len = %d\n", p->tot_len);
|
|
DHCPS_LOG("dhcps: send_ack>>p->len = %d\n", p->len);
|
|
#endif
|
|
q = p;
|
|
while(q != NULL){
|
|
data = (u8_t *)q->payload;
|
|
for(i=0; i<q->len; i++)
|
|
{
|
|
data[i] = ((u8_t *) m)[cnt++];
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("%02x ",data[i]);
|
|
if((i+1)%16 == 0){
|
|
DHCPS_LOG("\n");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
q = q->next;
|
|
}
|
|
}else{
|
|
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: send_ack>>pbuf_alloc failed\n");
|
|
#endif
|
|
return;
|
|
}
|
|
|
|
ip_addr_t ip_temp = IPADDR4_INIT(0x0);
|
|
ip4_addr_set(ip_2_ip4(&ip_temp), &broadcast_dhcps);
|
|
SendAck_err_t = udp_sendto( pcb_dhcps, p, &ip_temp, DHCPS_CLIENT_PORT );
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: send_ack>>udp_sendto result %x\n",SendAck_err_t);
|
|
#endif
|
|
|
|
if(p->ref != 0){
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("udhcp: send_ack>>free pbuf\n");
|
|
#endif
|
|
pbuf_free(p);
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : parse_options
|
|
* Description : parse DHCP message options
|
|
* Parameters : optptr -- DHCP message option info
|
|
* len -- DHCP message option length
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
static u8_t parse_options(u8_t *optptr, s16_t len)
|
|
{
|
|
ip4_addr_t client;
|
|
bool is_dhcp_parse_end = false;
|
|
struct dhcps_state s;
|
|
|
|
client.addr = *( (uint32_t *) &client_address);
|
|
|
|
u8_t *end = optptr + len;
|
|
u16_t type = 0;
|
|
|
|
s.state = DHCPS_STATE_IDLE;
|
|
|
|
while (optptr < end) {
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: (s16_t)*optptr = %d\n", (s16_t)*optptr);
|
|
#endif
|
|
switch ((s16_t) *optptr) {
|
|
|
|
case DHCP_OPTION_MSG_TYPE: //53
|
|
type = *(optptr + 2);
|
|
break;
|
|
|
|
case DHCP_OPTION_REQ_IPADDR://50
|
|
if( memcmp( (char *) &client.addr, (char *) optptr+2,4)==0 ) {
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: DHCP_OPTION_REQ_IPADDR = 0 ok\n");
|
|
#endif
|
|
s.state = DHCPS_STATE_ACK;
|
|
}else {
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: DHCP_OPTION_REQ_IPADDR != 0 err\n");
|
|
#endif
|
|
s.state = DHCPS_STATE_NAK;
|
|
}
|
|
break;
|
|
case DHCP_OPTION_END:
|
|
{
|
|
is_dhcp_parse_end = true;
|
|
}
|
|
break;
|
|
}
|
|
|
|
if(is_dhcp_parse_end){
|
|
break;
|
|
}
|
|
|
|
optptr += optptr[1] + 2;
|
|
}
|
|
|
|
switch (type){
|
|
|
|
case DHCPDISCOVER://1
|
|
s.state = DHCPS_STATE_OFFER;
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: DHCPD_STATE_OFFER\n");
|
|
#endif
|
|
break;
|
|
|
|
case DHCPREQUEST://3
|
|
if ( !(s.state == DHCPS_STATE_ACK || s.state == DHCPS_STATE_NAK) ) {
|
|
if(renew == true) {
|
|
s.state = DHCPS_STATE_ACK;
|
|
} else {
|
|
s.state = DHCPS_STATE_NAK;
|
|
}
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: DHCPD_STATE_NAK\n");
|
|
#endif
|
|
}
|
|
break;
|
|
|
|
case DHCPDECLINE://4
|
|
s.state = DHCPS_STATE_IDLE;
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: DHCPD_STATE_IDLE\n");
|
|
#endif
|
|
break;
|
|
|
|
case DHCPRELEASE://7
|
|
s.state = DHCPS_STATE_RELEASE;
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: DHCPD_STATE_IDLE\n");
|
|
#endif
|
|
break;
|
|
}
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: return s.state = %d\n", s.state);
|
|
#endif
|
|
return s.state;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : parse_msg
|
|
* Description : parse DHCP message from netif
|
|
* Parameters : m -- DHCP message info
|
|
* len -- DHCP message length
|
|
* Returns : DHCP message type
|
|
*******************************************************************************/
|
|
static s16_t parse_msg(struct dhcps_msg *m, u16_t len)
|
|
{
|
|
if(memcmp((char *)m->options,&magic_cookie,sizeof(magic_cookie)) == 0){
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: len = %d\n", len);
|
|
#endif
|
|
ip4_addr_t addr_tmp;
|
|
|
|
struct dhcps_pool *pdhcps_pool = NULL;
|
|
list_node *pnode = NULL;
|
|
list_node *pback_node = NULL;
|
|
ip4_addr_t first_address;
|
|
bool flag = false;
|
|
|
|
first_address.addr = dhcps_poll.start_ip.addr;
|
|
client_address.addr = client_address_plus.addr;
|
|
renew = false;
|
|
|
|
if (plist != NULL){
|
|
for (pback_node = plist; pback_node != NULL;pback_node = pback_node->pnext) {
|
|
pdhcps_pool = pback_node->pnode;
|
|
if (memcmp(pdhcps_pool->mac, m->chaddr, sizeof(pdhcps_pool->mac)) == 0){
|
|
if (memcmp(&pdhcps_pool->ip.addr, m->ciaddr, sizeof(pdhcps_pool->ip.addr)) == 0) {
|
|
renew = true;
|
|
}
|
|
client_address.addr = pdhcps_pool->ip.addr;
|
|
pdhcps_pool->lease_timer = dhcps_lease_time;
|
|
pnode = pback_node;
|
|
goto POOL_CHECK;
|
|
} else if (pdhcps_pool->ip.addr == client_address_plus.addr){
|
|
addr_tmp.addr = htonl(client_address_plus.addr);
|
|
addr_tmp.addr++;
|
|
client_address_plus.addr = htonl(addr_tmp.addr);
|
|
client_address.addr = client_address_plus.addr;
|
|
}
|
|
|
|
if (flag == false) { // search the fisrt unused ip
|
|
if (first_address.addr < pdhcps_pool->ip.addr) {
|
|
flag = true;
|
|
} else {
|
|
addr_tmp.addr = htonl(first_address.addr);
|
|
addr_tmp.addr++;
|
|
first_address.addr = htonl(addr_tmp.addr);
|
|
}
|
|
}
|
|
}
|
|
} else {
|
|
client_address.addr = dhcps_poll.start_ip.addr;
|
|
}
|
|
|
|
if (client_address_plus.addr > dhcps_poll.end_ip.addr) {
|
|
client_address.addr = first_address.addr;
|
|
}
|
|
if (client_address.addr > dhcps_poll.end_ip.addr) {
|
|
client_address_plus.addr = dhcps_poll.start_ip.addr;
|
|
pdhcps_pool = NULL;
|
|
pnode = NULL;
|
|
} else {
|
|
pdhcps_pool = (struct dhcps_pool *)malloc(sizeof(struct dhcps_pool));
|
|
memset(pdhcps_pool ,0x00 ,sizeof(struct dhcps_pool));
|
|
|
|
pdhcps_pool->ip.addr = client_address.addr;
|
|
memcpy(pdhcps_pool->mac, m->chaddr, sizeof(pdhcps_pool->mac));
|
|
pdhcps_pool->lease_timer = dhcps_lease_time;
|
|
pnode = (list_node *)malloc(sizeof(list_node ));
|
|
memset(pnode ,0x00 ,sizeof(list_node));
|
|
|
|
pnode->pnode = pdhcps_pool;
|
|
pnode->pnext = NULL;
|
|
node_insert_to_list(&plist,pnode);
|
|
if (client_address.addr == dhcps_poll.end_ip.addr) {
|
|
client_address_plus.addr = dhcps_poll.start_ip.addr;
|
|
} else {
|
|
addr_tmp.addr = htonl(client_address.addr);
|
|
addr_tmp.addr++;
|
|
client_address_plus.addr = htonl(addr_tmp.addr);
|
|
}
|
|
}
|
|
|
|
POOL_CHECK:
|
|
if ((client_address.addr > dhcps_poll.end_ip.addr) || (ip4_addr_isany(&client_address))){
|
|
if(pnode != NULL) {
|
|
node_remove_from_list(&plist,pnode);
|
|
free(pnode);
|
|
pnode = NULL;
|
|
}
|
|
|
|
if (pdhcps_pool != NULL) {
|
|
free(pdhcps_pool);
|
|
pdhcps_pool = NULL;
|
|
}
|
|
return 4;
|
|
}
|
|
|
|
s16_t ret = parse_options(&m->options[4], len);;
|
|
|
|
if(ret == DHCPS_STATE_RELEASE) {
|
|
if(pnode != NULL) {
|
|
node_remove_from_list(&plist,pnode);
|
|
free(pnode);
|
|
pnode = NULL;
|
|
}
|
|
|
|
if (pdhcps_pool != NULL) {
|
|
free(pdhcps_pool);
|
|
pdhcps_pool = NULL;
|
|
}
|
|
memset(&client_address,0x0,sizeof(client_address));
|
|
}
|
|
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: xid changed\n");
|
|
DHCPS_LOG("dhcps: client_address.addr = %x\n", client_address.addr);
|
|
#endif
|
|
return ret;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : handle_dhcp
|
|
* Description : If an incoming DHCP message is in response to us, then trigger the state machine
|
|
* Parameters : arg -- arg user supplied argument (udp_pcb.recv_arg)
|
|
* pcb -- the udp_pcb which received data
|
|
* p -- the packet buffer that was received
|
|
* addr -- the remote IP address from which the packet was received
|
|
* port -- the remote port from which the packet was received
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
static void handle_dhcp(void *arg,
|
|
struct udp_pcb *pcb,
|
|
struct pbuf *p,
|
|
const ip_addr_t *addr,
|
|
u16_t port)
|
|
{
|
|
struct dhcps_msg *pmsg_dhcps = NULL;
|
|
s16_t tlen;
|
|
u16_t i;
|
|
u16_t dhcps_msg_cnt=0;
|
|
u8_t *p_dhcps_msg = NULL;
|
|
u8_t *data;
|
|
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> receive a packet\n");
|
|
#endif
|
|
if (p==NULL) return;
|
|
|
|
pmsg_dhcps = (struct dhcps_msg *)malloc(sizeof(struct dhcps_msg));
|
|
memset(pmsg_dhcps ,0x00 ,sizeof(struct dhcps_msg));
|
|
|
|
if (NULL == pmsg_dhcps){
|
|
pbuf_free(p);
|
|
return;
|
|
}
|
|
p_dhcps_msg = (u8_t *)pmsg_dhcps;
|
|
tlen = p->tot_len;
|
|
data = p->payload;
|
|
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> p->tot_len = %d\n", tlen);
|
|
DHCPS_LOG("dhcps: handle_dhcp-> p->len = %d\n", p->len);
|
|
#endif
|
|
|
|
for(i=0; i<p->len; i++){
|
|
p_dhcps_msg[dhcps_msg_cnt++] = data[i];
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("%02x ",data[i]);
|
|
if((i+1)%16 == 0){
|
|
DHCPS_LOG("\n");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
if(p->next != NULL) {
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> p->next != NULL\n");
|
|
DHCPS_LOG("dhcps: handle_dhcp-> p->next->tot_len = %d\n",p->next->tot_len);
|
|
DHCPS_LOG("dhcps: handle_dhcp-> p->next->len = %d\n",p->next->len);
|
|
#endif
|
|
|
|
data = p->next->payload;
|
|
for(i=0; i<p->next->len; i++){
|
|
p_dhcps_msg[dhcps_msg_cnt++] = data[i];
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("%02x ",data[i]);
|
|
if((i+1)%16 == 0){
|
|
DHCPS_LOG("\n");
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> parse_msg(p)\n");
|
|
#endif
|
|
|
|
switch(parse_msg(pmsg_dhcps, tlen - 240)) {
|
|
case DHCPS_STATE_OFFER://1
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> DHCPD_STATE_OFFER\n");
|
|
#endif
|
|
send_offer(pmsg_dhcps);
|
|
break;
|
|
case DHCPS_STATE_ACK://3
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> DHCPD_STATE_ACK\n");
|
|
#endif
|
|
send_ack(pmsg_dhcps);
|
|
break;
|
|
case DHCPS_STATE_NAK://4
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> DHCPD_STATE_NAK\n");
|
|
#endif
|
|
send_nak(pmsg_dhcps);
|
|
break;
|
|
default :
|
|
break;
|
|
}
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps: handle_dhcp-> pbuf_free(p)\n");
|
|
#endif
|
|
pbuf_free(p);
|
|
free(pmsg_dhcps);
|
|
pmsg_dhcps = NULL;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : dhcps_poll_set
|
|
* Description : set ip poll from start to end for station
|
|
* Parameters : ip -- The current ip addr
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
static void dhcps_poll_set(u32_t ip)
|
|
{
|
|
u32_t softap_ip = 0,local_ip = 0;
|
|
u32_t start_ip = 0;
|
|
u32_t end_ip = 0;
|
|
if (dhcps_poll.enable == true) {
|
|
softap_ip = htonl(ip);
|
|
start_ip = htonl(dhcps_poll.start_ip.addr);
|
|
end_ip = htonl(dhcps_poll.end_ip.addr);
|
|
/*config ip information can't contain local ip*/
|
|
if ((start_ip <= softap_ip) && (softap_ip <= end_ip)) {
|
|
dhcps_poll.enable = false;
|
|
} else {
|
|
/*config ip information must be in the same segment as the local ip*/
|
|
softap_ip >>= 8;
|
|
if (((start_ip >> 8 != softap_ip) || (end_ip >> 8 != softap_ip))
|
|
|| (end_ip - start_ip > DHCPS_MAX_LEASE)) {
|
|
dhcps_poll.enable = false;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (dhcps_poll.enable == false) {
|
|
local_ip = softap_ip = htonl(ip);
|
|
softap_ip &= 0xFFFFFF00;
|
|
local_ip &= 0xFF;
|
|
if (local_ip >= 0x80)
|
|
local_ip -= DHCPS_MAX_LEASE;
|
|
else
|
|
local_ip ++;
|
|
|
|
bzero(&dhcps_poll, sizeof(dhcps_poll));
|
|
dhcps_poll.start_ip.addr = softap_ip | local_ip;
|
|
dhcps_poll.end_ip.addr = softap_ip | (local_ip + DHCPS_MAX_LEASE - 1);
|
|
dhcps_poll.start_ip.addr = htonl(dhcps_poll.start_ip.addr);
|
|
dhcps_poll.end_ip.addr= htonl(dhcps_poll.end_ip.addr);
|
|
}
|
|
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : dhcps_start
|
|
* Description : start dhcp server function
|
|
* Parameters : netif -- The current netif addr
|
|
* : info -- The current ip info
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
void dhcps_start(struct netif *netif, struct ip_info *info)
|
|
{
|
|
struct netif * apnetif =netif;
|
|
|
|
|
|
if(apnetif->dhcps_pcb != NULL) {
|
|
udp_remove(apnetif->dhcps_pcb);
|
|
}
|
|
pcb_dhcps = udp_new();
|
|
if (pcb_dhcps == NULL || info ==NULL) {
|
|
printf("dhcps_start(): could not obtain pcb\n");
|
|
}
|
|
apnetif->dhcps_pcb = pcb_dhcps;
|
|
|
|
IP4_ADDR(&broadcast_dhcps, 255, 255, 255, 255);
|
|
|
|
server_address = info->ip;
|
|
dhcps_poll_set( server_address.addr );
|
|
|
|
client_address_plus.addr = dhcps_poll.start_ip.addr;
|
|
|
|
udp_bind(pcb_dhcps, IP_ADDR_ANY, DHCPS_SERVER_PORT);
|
|
udp_recv(pcb_dhcps, handle_dhcp, NULL);
|
|
#if DHCPS_DEBUG
|
|
DHCPS_LOG("dhcps:dhcps_start->udp_recv function Set a receive callback handle_dhcp for UDP_PCB pcb_dhcps\n");
|
|
#endif
|
|
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : dhcps_stop
|
|
* Description : stop dhcp server function
|
|
* Parameters : netif -- The current netif addr
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
void dhcps_stop(struct netif *netif )
|
|
{
|
|
struct netif * apnetif = netif;
|
|
if(apnetif == NULL)
|
|
{
|
|
printf("dhcps_stop: apnetif == NULL\n");
|
|
return;
|
|
}
|
|
udp_disconnect(pcb_dhcps);
|
|
|
|
if(apnetif->dhcps_pcb != NULL) {
|
|
udp_remove(apnetif->dhcps_pcb);
|
|
apnetif->dhcps_pcb = NULL;
|
|
}
|
|
|
|
list_node *pnode = NULL;
|
|
list_node *pback_node = NULL;
|
|
pnode = plist;
|
|
while (pnode != NULL) {
|
|
pback_node = pnode;
|
|
pnode = pback_node->pnext;
|
|
node_remove_from_list(&plist, pback_node);
|
|
free(pback_node->pnode);
|
|
pback_node->pnode = NULL;
|
|
free(pback_node);
|
|
pback_node = NULL;
|
|
}
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : kill_oldest_dhcps_pool
|
|
* Description : remove the oldest node from list
|
|
* Parameters : none
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
static void kill_oldest_dhcps_pool(void)
|
|
{
|
|
list_node *pre = NULL, *p = NULL;
|
|
list_node *minpre = NULL, *minp = NULL;
|
|
struct dhcps_pool *pdhcps_pool = NULL, *pmin_pool = NULL;
|
|
pre = plist;
|
|
p = pre->pnext;
|
|
minpre = pre;
|
|
minp = p;
|
|
while (p != NULL){
|
|
pdhcps_pool = p->pnode;
|
|
pmin_pool = minp->pnode;
|
|
if (pdhcps_pool->lease_timer < pmin_pool->lease_timer){
|
|
minp = p;
|
|
minpre = pre;
|
|
}
|
|
pre = p;
|
|
p = p->pnext;
|
|
}
|
|
minpre->pnext = minp->pnext;
|
|
free(minp->pnode);
|
|
minp->pnode = NULL;
|
|
free(minp);
|
|
minp = NULL;
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : dhcps_coarse_tmr
|
|
* Description : the lease time count
|
|
* Parameters : none
|
|
* Returns : none
|
|
*******************************************************************************/
|
|
void dhcps_coarse_tmr(void)
|
|
{
|
|
u8_t num_dhcps_pool = 0;
|
|
list_node *pback_node = NULL;
|
|
list_node *pnode = NULL;
|
|
struct dhcps_pool *pdhcps_pool = NULL;
|
|
pnode = plist;
|
|
while (pnode != NULL) {
|
|
pdhcps_pool = pnode->pnode;
|
|
pdhcps_pool->lease_timer --;
|
|
if (pdhcps_pool->lease_timer == 0){
|
|
pback_node = pnode;
|
|
pnode = pback_node->pnext;
|
|
node_remove_from_list(&plist,pback_node);
|
|
free(pback_node->pnode);
|
|
pback_node->pnode = NULL;
|
|
free(pback_node);
|
|
pback_node = NULL;
|
|
} else {
|
|
pnode = pnode ->pnext;
|
|
num_dhcps_pool ++;
|
|
}
|
|
}
|
|
|
|
if (num_dhcps_pool >= MAX_STATION_NUM)
|
|
kill_oldest_dhcps_pool();
|
|
}
|
|
|
|
/******************************************************************************
|
|
* FunctionName : dhcp_search_ip_on_mac
|
|
* Description : Search ip address based on mac address
|
|
* Parameters : mac -- The MAC addr
|
|
* ip -- The IP info
|
|
* Returns : true or false
|
|
*******************************************************************************/
|
|
bool dhcp_search_ip_on_mac(u8_t *mac, ip4_addr_t *ip)
|
|
{
|
|
struct dhcps_pool *pdhcps_pool = NULL;
|
|
list_node *pback_node = NULL;
|
|
bool ret = false;
|
|
|
|
for (pback_node = plist; pback_node != NULL;pback_node = pback_node->pnext) {
|
|
pdhcps_pool = pback_node->pnode;
|
|
if (memcmp(pdhcps_pool->mac, mac, sizeof(pdhcps_pool->mac)) == 0){
|
|
memcpy(&ip->addr, &pdhcps_pool->ip.addr, sizeof(pdhcps_pool->ip.addr));
|
|
ret = true;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
#endif
|
|
|