-
Notifications
You must be signed in to change notification settings - Fork 13.3k
/
Copy pathdhcpserver.c
1160 lines (1031 loc) · 37.1 KB
/
dhcpserver.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include "lwip/inet.h"
#include "lwip/err.h"
#include "lwip/pbuf.h"
#include "lwip/udp.h"
#include "lwip/mem.h"
#include "osapi.h"
#include "lwip/app/dhcpserver.h"
#ifndef LWIP_OPEN_SRC
#include "net80211/ieee80211_var.h"
#endif
#include "user_interface.h"
#ifdef MEMLEAK_DEBUG
static const char mem_debug_file[] ICACHE_RODATA_ATTR = __FILE__;
#endif
////////////////////////////////////////////////////////////////////////////////////
//static const uint8_t xid[4] = {0xad, 0xde, 0x12, 0x23};
//static u8_t old_xid[4] = {0};
static const uint32 magic_cookie ICACHE_RODATA_ATTR = 0x63538263;
static struct udp_pcb *pcb_dhcps = NULL;
static struct ip_addr broadcast_dhcps;
static struct ip_addr server_address;
static struct ip_addr client_address;//added
static struct dhcps_lease dhcps_lease;
//static bool dhcps_lease_flag = true;
static list_node *plist = NULL;
static uint8 offer = 0xFF;
static bool renew = false;
#define DHCPS_LEASE_TIME_DEF (120)
uint32 dhcps_lease_time = DHCPS_LEASE_TIME_DEF; //minute
void wifi_softap_dhcps_client_leave(u8 *bssid, struct ip_addr *ip,bool force);
uint32 wifi_softap_dhcps_client_update(u8 *bssid, struct ip_addr *ip);
/******************************************************************************
* FunctionName : node_insert_to_list
* Description : insert the node to the list
* Parameters : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR 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 : arg -- Additional argument to pass to the callback function
* Returns : none
*******************************************************************************/
void ICACHE_FLASH_ATTR 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;
} else {
while (plist != NULL) {
if (plist->pnext == pdelete){
plist->pnext = pdelete->pnext;
}
plist = plist->pnext;
}
}
}
}
///////////////////////////////////////////////////////////////////////////////////
/*
* ��DHCP msg��Ϣ�ṹ����������
*
* @param optptr -- DHCP msg��Ϣλ��
* @param type -- Ҫ��ӵ�����option
*
* @return uint8_t* ����DHCP msgƫ�Ƶ�ַ
*/
///////////////////////////////////////////////////////////////////////////////////
static uint8_t* ICACHE_FLASH_ATTR add_msg_type(uint8_t *optptr, uint8_t type)
{
*optptr++ = DHCP_OPTION_MSG_TYPE;
*optptr++ = 1;
*optptr++ = type;
return optptr;
}
///////////////////////////////////////////////////////////////////////////////////
/*
* ��DHCP msg�ṹ������offerӦ������
*
* @param optptr -- DHCP msg��Ϣλ��
*
* @return uint8_t* ����DHCP msgƫ�Ƶ�ַ
*/
///////////////////////////////////////////////////////////////////////////////////
static uint8_t* ICACHE_FLASH_ATTR add_offer_options(uint8_t *optptr)
{
struct ip_addr ipadd;
ipadd.addr = *( (uint32_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_TIMER * 60) >> 24) & 0xFF;
*optptr++ = ((DHCPS_LEASE_TIMER * 60) >> 16) & 0xFF;
*optptr++ = ((DHCPS_LEASE_TIMER * 60) >> 8) & 0xFF;
*optptr++ = ((DHCPS_LEASE_TIMER * 60) >> 0) & 0xFF;
*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(offer)){
struct ip_info if_ip;
os_bzero(&if_ip, sizeof(struct ip_info));
wifi_get_ip_info(SOFTAP_IF, &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;
}
///////////////////////////////////////////////////////////////////////////////////
/*
* ��DHCP msg�ṹ����ӽ����־����
*
* @param optptr -- DHCP msg��Ϣλ��
*
* @return uint8_t* ����DHCP msgƫ�Ƶ�ַ
*/
///////////////////////////////////////////////////////////////////////////////////
static uint8_t* ICACHE_FLASH_ATTR add_end(uint8_t *optptr)
{
*optptr++ = DHCP_OPTION_END;
return optptr;
}
///////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR create_msg(struct dhcps_msg *m)
{
struct ip_addr client;
client.addr = client_address.addr;
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);
os_memcpy((char *) m->yiaddr, (char *) &client.addr, sizeof(m->yiaddr));
os_memset((char *) m->ciaddr, 0, sizeof(m->ciaddr));
os_memset((char *) m->siaddr, 0, sizeof(m->siaddr));
os_memset((char *) m->giaddr, 0, sizeof(m->giaddr));
os_memset((char *) m->sname, 0, sizeof(m->sname));
os_memset((char *) m->file, 0, sizeof(m->file));
os_memset((char *) m->options, 0, sizeof(m->options));
os_memcpy((char *) m->options, &magic_cookie, sizeof(magic_cookie));
}
///////////////////////////////////////////////////////////////////////////////////
/*
* ����һ��OFFER
*
* @param -- m ָ����Ҫ���͵�DHCP msg����
*/
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR send_offer(struct dhcps_msg *m)
{
uint8_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
os_printf("udhcp: send_offer>>p->ref = %d\n", p->ref);
#endif
if(p != NULL){
#if DHCPS_DEBUG
os_printf("dhcps: send_offer>>pbuf_alloc succeed\n");
os_printf("dhcps: send_offer>>p->tot_len = %d\n", p->tot_len);
os_printf("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++];
}
q = q->next;
}
}else{
#if DHCPS_DEBUG
os_printf("dhcps: send_offer>>pbuf_alloc failed\n");
#endif
return;
}
SendOffer_err_t = udp_sendto( pcb_dhcps, p, &broadcast_dhcps, DHCPS_CLIENT_PORT );
#if DHCPS_DEBUG
os_printf("dhcps: send_offer>>udp_sendto result %x\n",SendOffer_err_t);
#endif
if(p->ref != 0){
#if DHCPS_DEBUG
os_printf("udhcp: send_offer>>free pbuf\n");
#endif
pbuf_free(p);
}
}
///////////////////////////////////////////////////////////////////////////////////
/*
* ����һ��NAK��Ϣ
*
* @param m ָ����Ҫ���͵�DHCP msg����
*/
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR 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
os_printf("udhcp: send_nak>>p->ref = %d\n", p->ref);
#endif
if(p != NULL){
#if DHCPS_DEBUG
os_printf("dhcps: send_nak>>pbuf_alloc succeed\n");
os_printf("dhcps: send_nak>>p->tot_len = %d\n", p->tot_len);
os_printf("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++];
}
q = q->next;
}
}else{
#if DHCPS_DEBUG
os_printf("dhcps: send_nak>>pbuf_alloc failed\n");
#endif
return;
}
SendNak_err_t = udp_sendto( pcb_dhcps, p, &broadcast_dhcps, DHCPS_CLIENT_PORT );
#if DHCPS_DEBUG
os_printf("dhcps: send_nak>>udp_sendto result %x\n",SendNak_err_t);
#endif
if(p->ref != 0){
#if DHCPS_DEBUG
os_printf("udhcp: send_nak>>free pbuf\n");
#endif
pbuf_free(p);
}
}
///////////////////////////////////////////////////////////////////////////////////
/*
* ����һ��ACK��DHCP�ͻ���
*
* @param m ָ����Ҫ���͵�DHCP msg����
*/
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR 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
os_printf("udhcp: send_ack>>p->ref = %d\n", p->ref);
#endif
if(p != NULL){
#if DHCPS_DEBUG
os_printf("dhcps: send_ack>>pbuf_alloc succeed\n");
os_printf("dhcps: send_ack>>p->tot_len = %d\n", p->tot_len);
os_printf("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++];
}
q = q->next;
}
}else{
#if DHCPS_DEBUG
os_printf("dhcps: send_ack>>pbuf_alloc failed\n");
#endif
return;
}
SendAck_err_t = udp_sendto( pcb_dhcps, p, &broadcast_dhcps, DHCPS_CLIENT_PORT );
#if DHCPS_DEBUG
os_printf("dhcps: send_ack>>udp_sendto result %x\n",SendAck_err_t);
#endif
if(p->ref != 0){
#if DHCPS_DEBUG
os_printf("udhcp: send_ack>>free pbuf\n");
#endif
pbuf_free(p);
}
}
///////////////////////////////////////////////////////////////////////////////////
/*
* ����DHCP�ͻ��˷�����DHCP����������Ϣ�����Բ�ͬ��DHCP��������������Ӧ��Ӧ��
*
* @param optptr DHCP msg���������
* @param len ��������Ĵ��?(byte)
*
* @return uint8_t ���ش�����DHCP Server״ֵ̬
*/
///////////////////////////////////////////////////////////////////////////////////
static uint8_t ICACHE_FLASH_ATTR parse_options(uint8_t *optptr, sint16_t len)
{
struct ip_addr client;
bool is_dhcp_parse_end = false;
struct dhcps_state s;
client.addr = *( (uint32_t *) &client_address);// Ҫ�����DHCP�ͻ��˵�IP
u8_t *end = optptr + len;
u16_t type = 0;
s.state = DHCPS_STATE_IDLE;
while (optptr < end) {
#if DHCPS_DEBUG
os_printf("dhcps: (sint16_t)*optptr = %d\n", (sint16_t)*optptr);
#endif
switch ((sint16_t) *optptr) {
case DHCP_OPTION_MSG_TYPE: //53
type = *(optptr + 2);
break;
case DHCP_OPTION_REQ_IPADDR://50
//os_printf("dhcps:0x%08x,0x%08x\n",client.addr,*(uint32*)(optptr+2));
if( os_memcmp( (char *) &client.addr, (char *) optptr+2,4)==0 ) {
#if DHCPS_DEBUG
os_printf("dhcps: DHCP_OPTION_REQ_IPADDR = 0 ok\n");
#endif
s.state = DHCPS_STATE_ACK;
}else {
#if DHCPS_DEBUG
os_printf("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
os_printf("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
os_printf("dhcps: DHCPD_STATE_NAK\n");
#endif
}
break;
case DHCPDECLINE://4
s.state = DHCPS_STATE_IDLE;
#if DHCPS_DEBUG
os_printf("dhcps: DHCPD_STATE_IDLE\n");
#endif
break;
case DHCPRELEASE://7
s.state = DHCPS_STATE_RELEASE;
#if DHCPS_DEBUG
os_printf("dhcps: DHCPD_STATE_IDLE\n");
#endif
break;
}
#if DHCPS_DEBUG
os_printf("dhcps: return s.state = %d\n", s.state);
#endif
return s.state;
}
///////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////////
static sint16_t ICACHE_FLASH_ATTR parse_msg(struct dhcps_msg *m, u16_t len)
{
if(os_memcmp((char *)m->options,
&magic_cookie,
sizeof(magic_cookie)) == 0){
struct ip_addr ip;
os_memcpy(&ip.addr,m->ciaddr,sizeof(ip.addr));
client_address.addr = wifi_softap_dhcps_client_update(m->chaddr,&ip);
sint16_t ret = parse_options(&m->options[4], len);
if(ret == DHCPS_STATE_RELEASE) {
wifi_softap_dhcps_client_leave(m->chaddr,&ip,TRUE); // force to delete
client_address.addr = ip.addr;
}
return ret;
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////////
/*
* DHCP ��������ݰ���մ���ص�����˺�����LWIP UDPģ������ʱ������
* ��Ҫ����udp_recv()������LWIP����ע��.
*
* @param arg
* @param pcb ���յ�UDP��Ŀ��ƿ�?
* @param p ���յ���UDP�е��������?
* @param addr ���ʹ�UDP���Դ�����IP��ַ
* @param port ���ʹ�UDP���Դ�����UDPͨ���˿ں�
*/
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR handle_dhcp(void *arg,
struct udp_pcb *pcb,
struct pbuf *p,
struct ip_addr *addr,
uint16_t port)
{
struct dhcps_msg *pmsg_dhcps = NULL;
sint16_t tlen = 0;
u16_t i = 0;
u16_t dhcps_msg_cnt = 0;
u8_t *p_dhcps_msg = NULL;
u8_t *data = NULL;
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> receive a packet\n");
#endif
if (p==NULL) return;
pmsg_dhcps = (struct dhcps_msg *)os_zalloc(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
os_printf("dhcps: handle_dhcp-> p->tot_len = %d\n", tlen);
os_printf("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(p->next != NULL) {
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> p->next != NULL\n");
os_printf("dhcps: handle_dhcp-> p->next->tot_len = %d\n",p->next->tot_len);
os_printf("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];
}
}
/*
* DHCP �ͻ���������Ϣ����
*/
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> parse_msg(p)\n");
#endif
switch(parse_msg(pmsg_dhcps, tlen - 240)) {
case DHCPS_STATE_OFFER://1
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> DHCPD_STATE_OFFER\n");
#endif
send_offer(pmsg_dhcps);
break;
case DHCPS_STATE_ACK://3
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> DHCPD_STATE_ACK\n");
#endif
send_ack(pmsg_dhcps);
break;
case DHCPS_STATE_NAK://4
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> DHCPD_STATE_NAK\n");
#endif
send_nak(pmsg_dhcps);
break;
default :
break;
}
#if DHCPS_DEBUG
os_printf("dhcps: handle_dhcp-> pbuf_free(p)\n");
#endif
pbuf_free(p);
os_free(pmsg_dhcps);
pmsg_dhcps = NULL;
}
///////////////////////////////////////////////////////////////////////////////////
static void ICACHE_FLASH_ATTR wifi_softap_init_dhcps_lease(uint32 ip)
{
uint32 softap_ip = 0,local_ip = 0;
uint32 start_ip = 0;
uint32 end_ip = 0;
// if (dhcps_lease_flag) {
if (dhcps_lease.enable == TRUE) {
softap_ip = htonl(ip);
start_ip = htonl(dhcps_lease.start_ip.addr);
end_ip = htonl(dhcps_lease.end_ip.addr);
/*config ip information can't contain local ip*/
if ((start_ip <= softap_ip) && (softap_ip <= end_ip)) {
dhcps_lease.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_lease.enable = FALSE;
}
}
}
if (dhcps_lease.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 ++;
os_bzero(&dhcps_lease, sizeof(dhcps_lease));
dhcps_lease.start_ip.addr = softap_ip | local_ip;
dhcps_lease.end_ip.addr = softap_ip | (local_ip + DHCPS_MAX_LEASE - 1);
dhcps_lease.start_ip.addr = htonl(dhcps_lease.start_ip.addr);
dhcps_lease.end_ip.addr= htonl(dhcps_lease.end_ip.addr);
}
// dhcps_lease.start_ip.addr = htonl(dhcps_lease.start_ip.addr);
// dhcps_lease.end_ip.addr= htonl(dhcps_lease.end_ip.addr);
// os_printf("start_ip = 0x%x, end_ip = 0x%x\n",dhcps_lease.start_ip, dhcps_lease.end_ip);
}
///////////////////////////////////////////////////////////////////////////////////
void ICACHE_FLASH_ATTR dhcps_start(struct ip_info *info)
{
struct netif * apnetif = (struct netif *)eagle_lwip_getif(0x01);
if(apnetif->dhcps_pcb != NULL) {
udp_remove(apnetif->dhcps_pcb);
}
pcb_dhcps = udp_new();
if (pcb_dhcps == NULL || info ==NULL) {
os_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;
wifi_softap_init_dhcps_lease(server_address.addr);
udp_bind(pcb_dhcps, IP_ADDR_ANY, DHCPS_SERVER_PORT);
udp_recv(pcb_dhcps, handle_dhcp, NULL);
#if DHCPS_DEBUG
os_printf("dhcps:dhcps_start->udp_recv function Set a receive callback handle_dhcp for UDP_PCB pcb_dhcps\n");
#endif
}
void ICACHE_FLASH_ATTR dhcps_stop(void)
{
struct netif * apnetif = (struct netif *)eagle_lwip_getif(0x01);
udp_disconnect(pcb_dhcps);
// dhcps_lease_flag = true;
if(apnetif->dhcps_pcb != NULL) {
udp_remove(apnetif->dhcps_pcb);
apnetif->dhcps_pcb = NULL;
}
//udp_remove(pcb_dhcps);
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);
os_free(pback_node->pnode);
pback_node->pnode = NULL;
os_free(pback_node);
pback_node = NULL;
}
}
/******************************************************************************
* FunctionName : wifi_softap_set_dhcps_lease
* Description : set the lease information of DHCP server
* Parameters : please -- Additional argument to set the lease information,
* Little-Endian.
* Returns : true or false
*******************************************************************************/
bool ICACHE_FLASH_ATTR wifi_softap_set_dhcps_lease(struct dhcps_lease *please)
{
struct ip_info info;
uint32 softap_ip = 0;
uint32 start_ip = 0;
uint32 end_ip = 0;
uint8 opmode = wifi_get_opmode();
if (opmode == STATION_MODE || opmode == NULL_MODE) {
return false;
}
if (please == NULL || wifi_softap_dhcps_status() == DHCP_STARTED)
return false;
if(please->enable) {
os_bzero(&info, sizeof(struct ip_info));
wifi_get_ip_info(SOFTAP_IF, &info);
softap_ip = htonl(info.ip.addr);
start_ip = htonl(please->start_ip.addr);
end_ip = htonl(please->end_ip.addr);
/*config ip information can't contain local ip*/
if ((start_ip <= softap_ip) && (softap_ip <= end_ip))
return false;
/*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)) {
return false;
}
if (end_ip - start_ip > DHCPS_MAX_LEASE)
return false;
os_bzero(&dhcps_lease, sizeof(dhcps_lease));
// dhcps_lease.start_ip.addr = start_ip;
// dhcps_lease.end_ip.addr = end_ip;
dhcps_lease.start_ip.addr = please->start_ip.addr;
dhcps_lease.end_ip.addr = please->end_ip.addr;
}
dhcps_lease.enable = please->enable;
// dhcps_lease_flag = false;
return true;
}
/******************************************************************************
* FunctionName : wifi_softap_get_dhcps_lease
* Description : get the lease information of DHCP server
* Parameters : please -- Additional argument to get the lease information,
* Little-Endian.
* Returns : true or false
*******************************************************************************/
bool ICACHE_FLASH_ATTR wifi_softap_get_dhcps_lease(struct dhcps_lease *please)
{
uint8 opmode = wifi_get_opmode();
if (opmode == STATION_MODE || opmode == NULL_MODE) {
return false;
}
if (NULL == please)
return false;
// if (dhcps_lease_flag){
if (dhcps_lease.enable == FALSE){
if (wifi_softap_dhcps_status() == DHCP_STOPPED)
return false;
} else {
// os_bzero(please, sizeof(dhcps_lease));
// if (wifi_softap_dhcps_status() == DHCP_STOPPED){
// please->start_ip.addr = htonl(dhcps_lease.start_ip.addr);
// please->end_ip.addr = htonl(dhcps_lease.end_ip.addr);
// }
}
// if (wifi_softap_dhcps_status() == DHCP_STARTED){
// os_bzero(please, sizeof(dhcps_lease));
// please->start_ip.addr = dhcps_lease.start_ip.addr;
// please->end_ip.addr = dhcps_lease.end_ip.addr;
// }
please->start_ip.addr = dhcps_lease.start_ip.addr;
please->end_ip.addr = dhcps_lease.end_ip.addr;
return true;
}
static void ICACHE_FLASH_ATTR 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;pdhcps_pool->state = DHCPS_STATE_OFFLINE;
os_free(minp->pnode);
minp->pnode = NULL;
os_free(minp);
minp = NULL;
}
void ICACHE_FLASH_ATTR dhcps_coarse_tmr(void)
{
uint8 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;
if ( pdhcps_pool->type == DHCPS_TYPE_DYNAMIC) {
pdhcps_pool->lease_timer --;
}
if (pdhcps_pool->lease_timer == 0){
pback_node = pnode;
pnode = pback_node->pnext;
node_remove_from_list(&plist,pback_node);
os_free(pback_node->pnode);
pback_node->pnode = NULL;
os_free(pback_node);
pback_node = NULL;
} else {
pnode = pnode ->pnext;
num_dhcps_pool ++;
}
}
if (num_dhcps_pool >= MAX_STATION_NUM)
kill_oldest_dhcps_pool();
}
bool ICACHE_FLASH_ATTR wifi_softap_set_dhcps_offer_option(uint8 level, void* optarg)
{
bool offer_flag = true;
uint8 option = 0;
if (optarg == NULL && wifi_softap_dhcps_status() == false)
return false;
if (level <= OFFER_START || level >= OFFER_END)
return false;
switch (level){
case OFFER_ROUTER:
offer = (*(uint8 *)optarg) & 0x01;
offer_flag = true;
break;
default :
offer_flag = false;
break;
}
return offer_flag;
}
bool ICACHE_FLASH_ATTR wifi_softap_set_dhcps_lease_time(uint32 minute)
{
uint8 opmode = wifi_get_opmode();
if (opmode == STATION_MODE || opmode == NULL_MODE) {
return false;
}
if (wifi_softap_dhcps_status() == DHCP_STARTED) {
return false;
}
if(minute == 0) {
return false;
}
dhcps_lease_time = minute;
return true;
}
bool ICACHE_FLASH_ATTR wifi_softap_reset_dhcps_lease_time(void)
{
uint8 opmode = wifi_get_opmode();
if (opmode == STATION_MODE || opmode == NULL_MODE) {
return false;
}
if (wifi_softap_dhcps_status() == DHCP_STARTED) {
return false;
}
dhcps_lease_time = DHCPS_LEASE_TIME_DEF;
return true;
}
uint32 ICACHE_FLASH_ATTR wifi_softap_get_dhcps_lease_time(void) // minute
{
return dhcps_lease_time;
}
void ICACHE_FLASH_ATTR wifi_softap_dhcps_client_leave(u8 *bssid, struct ip_addr *ip,bool force)
{
struct dhcps_pool *pdhcps_pool = NULL;
list_node *pback_node = NULL;
if ((bssid == NULL) || (ip == NULL)) {
return;
}
for (pback_node = plist; pback_node != NULL;pback_node = pback_node->pnext) {
pdhcps_pool = pback_node->pnode;
if (os_memcmp(pdhcps_pool->mac, bssid, sizeof(pdhcps_pool->mac)) == 0){
if (os_memcmp(&pdhcps_pool->ip.addr, &ip->addr, sizeof(pdhcps_pool->ip.addr)) == 0) {
if ((pdhcps_pool->type == DHCPS_TYPE_STATIC) || (force)) {