OVMS3-idf/components/lwip/apps/dhcpserver.c

1116 lines
33 KiB
C
Raw Normal View History

2016-08-17 15:08:22 +00:00
// Copyright 2015-2016 Espressif Systems (Shanghai) PTE LTD
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//#include "esp_common.h"
#include <stdlib.h>
#include <string.h>
#include "lwip/inet.h"
#include "lwip/err.h"
#include "lwip/pbuf.h"
#include "lwip/udp.h"
#include "lwip/mem.h"
#include "lwip/ip_addr.h"
#include "tcpip_adapter.h"
#include "apps/dhcpserver.h"
2016-08-17 15:08:22 +00:00
#ifdef LWIP_ESP8266
2016-08-17 15:08:22 +00:00
#define BOOTP_BROADCAST 0x8000
#define DHCP_REQUEST 1
#define DHCP_REPLY 2
#define DHCP_HTYPE_ETHERNET 1
#define DHCP_HLEN_ETHERNET 6
#define DHCP_MSG_LEN 236
#define DHCPS_SERVER_PORT 67
#define DHCPS_CLIENT_PORT 68
#define DHCPDISCOVER 1
#define DHCPOFFER 2
#define DHCPREQUEST 3
#define DHCPDECLINE 4
#define DHCPACK 5
#define DHCPNAK 6
#define DHCPRELEASE 7
#define DHCP_OPTION_SUBNET_MASK 1
#define DHCP_OPTION_ROUTER 3
#define DHCP_OPTION_DNS_SERVER 6
#define DHCP_OPTION_REQ_IPADDR 50
#define DHCP_OPTION_LEASE_TIME 51
#define DHCP_OPTION_MSG_TYPE 53
#define DHCP_OPTION_SERVER_ID 54
#define DHCP_OPTION_INTERFACE_MTU 26
#define DHCP_OPTION_PERFORM_ROUTER_DISCOVERY 31
#define DHCP_OPTION_BROADCAST_ADDRESS 28
#define DHCP_OPTION_REQ_LIST 55
#define DHCP_OPTION_END 255
//#define USE_CLASS_B_NET 1
#define DHCPS_DEBUG 0
#define DHCPS_LOG printf
#define MAX_STATION_NUM 8
#define DHCPS_STATE_OFFER 1
#define DHCPS_STATE_DECLINE 2
#define DHCPS_STATE_ACK 3
#define DHCPS_STATE_NAK 4
#define DHCPS_STATE_IDLE 5
#define DHCPS_STATE_RELEASE 6
#ifdef MEMLEAK_DEBUG
static const char mem_debug_file[] ICACHE_RODATA_ATTR STORE_ATTR = __FILE__;
#endif
////////////////////////////////////////////////////////////////////////////////////
static const u32_t magic_cookie = 0x63538263;
2016-08-17 15:08:22 +00:00
static struct udp_pcb *pcb_dhcps = NULL;
static ip4_addr_t broadcast_dhcps;
static ip4_addr_t server_address;
static ip4_addr_t client_address; //added
static ip4_addr_t client_address_plus;
static list_node *plist = NULL;
static bool renew = false;
static dhcps_lease_t dhcps_poll;
static dhcps_offer_t dhcps_offer = 0xFF;
static dhcps_time_t dhcps_lease_time = DHCPS_LEASE_TIME_DEF; //minute
2016-08-17 15:08:22 +00:00
/******************************************************************************
* FunctionName : dhcps_option_info
* Description : get the DHCP message option info
* Parameters : op_id -- DHCP message option id
* opt_len -- DHCP message option length
* Returns : DHCP message option addr
*******************************************************************************/
void *dhcps_option_info(u8_t op_id, u32_t opt_len)
2016-08-17 15:08:22 +00:00
{
void* option_arg = NULL;
switch (op_id){
case IP_ADDRESS_LEASE_TIME:
if (opt_len == sizeof(dhcps_time_t))
option_arg = &dhcps_lease_time;
break;
case REQUESTED_IP_ADDRESS:
if (opt_len == sizeof(dhcps_lease_t))
option_arg = &dhcps_poll;
break;
case ROUTER_SOLICITATION_ADDRESS:
if (opt_len == sizeof(dhcps_offer_t))
option_arg = &dhcps_offer;
break;
default:
break;
}
return option_arg;
2016-08-17 15:08:22 +00:00
}
2016-08-17 15:08:22 +00:00
/******************************************************************************
* FunctionName : node_insert_to_list
* Description : insert the node to the list
* Parameters : phead -- the head node of the list
* pinsert -- the insert node of the list
2016-08-17 15:08:22 +00:00
* Returns : none
*******************************************************************************/
void node_insert_to_list(list_node **phead, list_node* pinsert)
{
list_node *plist = NULL;
struct dhcps_pool *pdhcps_pool = NULL;
struct dhcps_pool *pdhcps_node = NULL;
if (*phead == NULL)
*phead = pinsert;
else {
plist = *phead;
pdhcps_node = pinsert->pnode;
pdhcps_pool = plist->pnode;
if(pdhcps_node->ip.addr < pdhcps_pool->ip.addr) {
pinsert->pnext = plist;
*phead = pinsert;
} else {
while (plist->pnext != NULL) {
pdhcps_pool = plist->pnext->pnode;
if (pdhcps_node->ip.addr < pdhcps_pool->ip.addr) {
pinsert->pnext = plist->pnext;
plist->pnext = pinsert;
break;
}
plist = plist->pnext;
}
if(plist->pnext == NULL) {
plist->pnext = pinsert;
}
}
}
// pinsert->pnext = NULL;
}
/******************************************************************************
* FunctionName : node_delete_from_list
* Description : remove the node from list
* Parameters : phead -- the head node of the list
* pdelete -- the remove node of the list
2016-08-17 15:08:22 +00:00
* Returns : none
*******************************************************************************/
void node_remove_from_list(list_node **phead, list_node* pdelete)
{
list_node *plist = NULL;
plist = *phead;
if (plist == NULL){
*phead = NULL;
} else {
if (plist == pdelete){
*phead = plist->pnext;
pdelete->pnext = NULL;
} else {
while (plist != NULL) {
if (plist->pnext == pdelete){
plist->pnext = pdelete->pnext;
pdelete->pnext = NULL;
}
plist = plist->pnext;
}
}
}
}
/******************************************************************************
* FunctionName : add_msg_type
* Description : add TYPE option of DHCP message
* Parameters : optptr -- the addr of DHCP message option
* Returns : the addr of DHCP message option
*******************************************************************************/
2016-08-17 15:08:22 +00:00
static u8_t* add_msg_type(u8_t *optptr, u8_t type)
{
*optptr++ = DHCP_OPTION_MSG_TYPE;
*optptr++ = 1;
*optptr++ = type;
return optptr;
}
/******************************************************************************
* FunctionName : add_offer_options
* Description : add OFFER option of DHCP message
* Parameters : optptr -- the addr of DHCP message option
* Returns : the addr of DHCP message option
*******************************************************************************/
2016-08-17 15:08:22 +00:00
static u8_t* add_offer_options(u8_t *optptr)
{
ip4_addr_t ipadd;
ipadd.addr = *( (u32_t *) &server_address);
#ifdef USE_CLASS_B_NET
*optptr++ = DHCP_OPTION_SUBNET_MASK;
*optptr++ = 4; //length
*optptr++ = 255;
*optptr++ = 240;
*optptr++ = 0;
*optptr++ = 0;
#else
*optptr++ = DHCP_OPTION_SUBNET_MASK;
*optptr++ = 4;
*optptr++ = 255;
*optptr++ = 255;
*optptr++ = 255;
*optptr++ = 0;
#endif
*optptr++ = DHCP_OPTION_LEASE_TIME;
*optptr++ = 4;
*optptr++ = ((dhcps_lease_time * 60) >> 24) & 0xFF;
*optptr++ = ((dhcps_lease_time * 60) >> 16) & 0xFF;
*optptr++ = ((dhcps_lease_time * 60) >> 8) & 0xFF;
*optptr++ = ((dhcps_lease_time * 60) >> 0) & 0xFF;
2016-08-17 15:08:22 +00:00
*optptr++ = DHCP_OPTION_SERVER_ID;
*optptr++ = 4;
*optptr++ = ip4_addr1( &ipadd);
*optptr++ = ip4_addr2( &ipadd);
*optptr++ = ip4_addr3( &ipadd);
*optptr++ = ip4_addr4( &ipadd);
if (dhcps_router_enabled(dhcps_offer)){
2016-08-17 15:08:22 +00:00
struct ip_info if_ip;
//bzero(&if_ip, sizeof(struct ip_info));
memset(&if_ip ,0x00, sizeof(struct ip_info));
tcpip_adapter_get_ip_info(WIFI_IF_AP, &if_ip);
*optptr++ = DHCP_OPTION_ROUTER;
*optptr++ = 4;
*optptr++ = ip4_addr1( &if_ip.gw);
*optptr++ = ip4_addr2( &if_ip.gw);
*optptr++ = ip4_addr3( &if_ip.gw);
*optptr++ = ip4_addr4( &if_ip.gw);
}
#ifdef USE_DNS
*optptr++ = DHCP_OPTION_DNS_SERVER;
*optptr++ = 4;
*optptr++ = ip4_addr1( &ipadd);
*optptr++ = ip4_addr2( &ipadd);
*optptr++ = ip4_addr3( &ipadd);
*optptr++ = ip4_addr4( &ipadd);
#endif
#ifdef CLASS_B_NET
*optptr++ = DHCP_OPTION_BROADCAST_ADDRESS;
*optptr++ = 4;
*optptr++ = ip4_addr1( &ipadd);
*optptr++ = 255;
*optptr++ = 255;
*optptr++ = 255;
#else
*optptr++ = DHCP_OPTION_BROADCAST_ADDRESS;
*optptr++ = 4;
*optptr++ = ip4_addr1( &ipadd);
*optptr++ = ip4_addr2( &ipadd);
*optptr++ = ip4_addr3( &ipadd);
*optptr++ = 255;
#endif
*optptr++ = DHCP_OPTION_INTERFACE_MTU;
*optptr++ = 2;
#ifdef CLASS_B_NET
*optptr++ = 0x05;
*optptr++ = 0xdc;
#else
*optptr++ = 0x02;
*optptr++ = 0x40;
#endif
*optptr++ = DHCP_OPTION_PERFORM_ROUTER_DISCOVERY;
*optptr++ = 1;
*optptr++ = 0x00;
*optptr++ = 43;
*optptr++ = 6;
*optptr++ = 0x01;
*optptr++ = 4;
*optptr++ = 0x00;
*optptr++ = 0x00;
*optptr++ = 0x00;
*optptr++ = 0x02;
return optptr;
}
/******************************************************************************
* FunctionName : add_end
* Description : add end option of DHCP message
* Parameters : optptr -- the addr of DHCP message option
* Returns : the addr of DHCP message option
*******************************************************************************/
2016-08-17 15:08:22 +00:00
static u8_t* add_end(u8_t *optptr)
{
*optptr++ = DHCP_OPTION_END;
return optptr;
}
/******************************************************************************
* FunctionName : create_msg
* Description : create response message
* Parameters : m -- DHCP message info
* Returns : none
*******************************************************************************/
2016-08-17 15:08:22 +00:00
static void create_msg(struct dhcps_msg *m)
{
ip4_addr_t client;
client.addr = *( (uint32_t *) &client_address);
m->op = DHCP_REPLY;
m->htype = DHCP_HTYPE_ETHERNET;
m->hlen = 6;
m->hops = 0;
// os_memcpy((char *) xid, (char *) m->xid, sizeof(m->xid));
m->secs = 0;
m->flags = htons(BOOTP_BROADCAST);
memcpy((char *) m->yiaddr, (char *) &client.addr, sizeof(m->yiaddr));
memset((char *) m->ciaddr, 0, sizeof(m->ciaddr));
memset((char *) m->siaddr, 0, sizeof(m->siaddr));
memset((char *) m->giaddr, 0, sizeof(m->giaddr));
memset((char *) m->sname, 0, sizeof(m->sname));
memset((char *) m->file, 0, sizeof(m->file));
memset((char *) m->options, 0, sizeof(m->options));
u32_t magic_cookie_temp = magic_cookie;
2016-08-17 15:08:22 +00:00
memcpy((char *) m->options, &magic_cookie_temp, sizeof(magic_cookie_temp));
}
/******************************************************************************
* FunctionName : send_offer
* Description : DHCP message OFFER Response
* Parameters : m -- DHCP message info
* Returns : none
*******************************************************************************/
2016-08-17 15:08:22 +00:00
static void send_offer(struct dhcps_msg *m)
{
u8_t *end;
struct pbuf *p, *q;
u8_t *data;
u16_t cnt=0;
u16_t i;
err_t SendOffer_err_t;
create_msg(m);
end = add_msg_type(&m->options[4], DHCPOFFER);
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_offer>>p->ref = %d\n", p->ref);
#endif
if(p != NULL){
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: send_offer>>pbuf_alloc succeed\n");
DHCPS_LOG("dhcps: send_offer>>p->tot_len = %d\n", p->tot_len);
DHCPS_LOG("dhcps: send_offer>>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_offer>>pbuf_alloc failed\n");
#endif
return;
}
ip_addr_t ip_temp = IPADDR4_INIT(0x0);
ip4_addr_set(ip_2_ip4(&ip_temp), &broadcast_dhcps);
SendOffer_err_t = udp_sendto( pcb_dhcps, p, &ip_temp, DHCPS_CLIENT_PORT );
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: send_offer>>udp_sendto result %x\n",SendOffer_err_t);
#endif
if(p->ref != 0){
#if DHCPS_DEBUG
DHCPS_LOG("udhcp: send_offer>>free pbuf\n");
#endif
pbuf_free(p);
}
}
/******************************************************************************
* FunctionName : send_nak
* Description : DHCP message NACK Response
* Parameters : m -- DHCP message info
* Returns : none
*******************************************************************************/
2016-08-17 15:08:22 +00:00
static void send_nak(struct dhcps_msg *m)
{
u8_t *end;
struct pbuf *p, *q;
u8_t *data;
u16_t cnt=0;
u16_t i;
err_t SendNak_err_t;
create_msg(m);
end = add_msg_type(&m->options[4], DHCPNAK);
end = add_end(end);
p = pbuf_alloc(PBUF_TRANSPORT, sizeof(struct dhcps_msg), PBUF_RAM);
#if DHCPS_DEBUG
DHCPS_LOG("udhcp: send_nak>>p->ref = %d\n", p->ref);
#endif
if(p != NULL){
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: send_nak>>pbuf_alloc succeed\n");
DHCPS_LOG("dhcps: send_nak>>p->tot_len = %d\n", p->tot_len);
DHCPS_LOG("dhcps: send_nak>>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_nak>>pbuf_alloc failed\n");
#endif
return;
}
ip_addr_t ip_temp = IPADDR4_INIT(0x0);
ip4_addr_set(ip_2_ip4(&ip_temp), &broadcast_dhcps);
SendNak_err_t = udp_sendto( pcb_dhcps, p, &ip_temp, DHCPS_CLIENT_PORT );
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: send_nak>>udp_sendto result %x\n",SendNak_err_t);
#endif
if(p->ref != 0){
#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
*******************************************************************************/
2016-08-17 15:08:22 +00:00
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
*******************************************************************************/
2016-08-17 15:08:22 +00:00
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);
2016-08-17 15:08:22 +00:00
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
*******************************************************************************/
2016-08-17 15:08:22 +00:00
static s16_t parse_msg(struct dhcps_msg *m, u16_t len)
{
if(memcmp((char *)m->options,&magic_cookie,sizeof(magic_cookie)) == 0){
2016-08-17 15:08:22 +00:00
#if DHCPS_DEBUG
DHCPS_LOG("dhcps: len = %d\n", len);
2016-08-17 15:08:22 +00:00
#endif
ip4_addr_t addr_tmp;
2016-08-17 15:08:22 +00:00
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;
2016-08-17 15:08:22 +00:00
client_address.addr = client_address_plus.addr;
renew = false;
2016-08-17 15:08:22 +00:00
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;
2016-08-17 15:08:22 +00:00
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);
}
}
}
if (client_address_plus.addr > dhcps_poll.end_ip.addr) {
2016-08-17 15:08:22 +00:00
client_address.addr = first_address.addr;
}
if (client_address.addr > dhcps_poll.end_ip.addr) {
client_address_plus.addr = dhcps_poll.start_ip.addr;
2016-08-17 15:08:22 +00:00
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;
2016-08-17 15:08:22 +00:00
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;
2016-08-17 15:08:22 +00:00
} 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))){
2016-08-17 15:08:22 +00:00
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);
2016-08-17 15:08:22 +00:00
#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
*******************************************************************************/
2016-08-17 15:08:22 +00:00
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)
2016-08-17 15:08:22 +00:00
{
u32_t softap_ip = 0,local_ip = 0;
u32_t start_ip = 0;
u32_t end_ip = 0;
if (dhcps_poll.enable == true) {
2016-08-17 15:08:22 +00:00
softap_ip = htonl(ip);
start_ip = htonl(dhcps_poll.start_ip.addr);
end_ip = htonl(dhcps_poll.end_ip.addr);
2016-08-17 15:08:22 +00:00
/*config ip information can't contain local ip*/
if ((start_ip <= softap_ip) && (softap_ip <= end_ip)) {
dhcps_poll.enable = false;
2016-08-17 15:08:22 +00:00
} 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;
2016-08-17 15:08:22 +00:00
}
}
}
if (dhcps_poll.enable == false) {
2016-08-17 15:08:22 +00:00
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);
2016-08-17 15:08:22 +00:00
}
}
2016-08-17 15:08:22 +00:00
/******************************************************************************
* 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)
2016-08-17 15:08:22 +00:00
{
struct netif * apnetif =netif;
if(apnetif->dhcps_pcb != NULL) {
udp_remove(apnetif->dhcps_pcb);
}
pcb_dhcps = udp_new();
if (pcb_dhcps == NULL || info ==NULL) {
2016-08-17 15:08:22 +00:00
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 );
2016-08-17 15:08:22 +00:00
client_address_plus.addr = dhcps_poll.start_ip.addr;
2016-08-17 15:08:22 +00:00
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
*******************************************************************************/
2016-08-17 15:08:22 +00:00
void dhcps_stop(struct netif *netif )
{
struct netif * apnetif = netif;
if(apnetif == NULL)
{
printf("dhcps_stop: apnetif == NULL\n");
return;
}
udp_disconnect(pcb_dhcps);
2016-08-17 15:08:22 +00:00
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
*******************************************************************************/
2016-08-17 15:08:22 +00:00
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
*******************************************************************************/
2016-08-17 15:08:22 +00:00
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
2016-08-17 15:08:22 +00:00