/
openconnect-internal.h
1327 lines (1165 loc) · 41.3 KB
/
openconnect-internal.h
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
/*
* OpenConnect (SSL + DTLS) VPN client
*
* Copyright © 2008-2015 Intel Corporation.
* Copyright © 2008 Nick Andrew <nick@nick-andrew.net>
* Copyright © 2013 John Morrissey <jwm@horde.net>
*
* Author: David Woodhouse <dwmw2@infradead.org>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* version 2.1, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*/
#ifndef __OPENCONNECT_INTERNAL_H__
#define __OPENCONNECT_INTERNAL_H__
#define __OPENCONNECT_PRIVATE__
#ifdef _WIN32
#include <winsock2.h>
#include <ws2tcpip.h>
#ifndef SECURITY_WIN32
#define SECURITY_WIN32 1
#endif
#include <security.h>
#else
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/select.h>
#include <netdb.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <fcntl.h>
#endif
#include "openconnect.h"
/* Equivalent of "/dev/null" on Windows.
* See https://stackoverflow.com/a/44163934
*/
#ifdef _WIN32
#define DEVNULL "NUL"
#else
#define DEVNULL "/dev/null"
#endif
#if defined(OPENCONNECT_OPENSSL)
#include <openssl/ssl.h>
#include <openssl/err.h>
/* Ick */
#if OPENSSL_VERSION_NUMBER >= 0x00909000L
#define method_const const
#else
#define method_const
#endif
#endif /* OPENSSL */
#if defined(OPENCONNECT_GNUTLS)
#include <gnutls/gnutls.h>
#include <gnutls/abstract.h>
#include <gnutls/x509.h>
#include <gnutls/crypto.h>
#endif
#ifdef HAVE_ICONV
#include <langinfo.h>
#include <iconv.h>
#endif
#include <zlib.h>
#include <stdint.h>
#include <sys/time.h>
#include <sys/types.h>
#include <unistd.h>
#include <string.h>
#ifdef LIBPROXY_HDR
#include LIBPROXY_HDR
#endif
#ifdef HAVE_LIBSTOKEN
#include <stoken.h>
#endif
#ifdef HAVE_GSSAPI
#include GSSAPI_HDR
#endif
#ifdef HAVE_LIBPSKC
#include <pskc/pskc.h>
#endif
#ifdef HAVE_LIBP11
#include <libp11.h>
#endif
#ifdef ENABLE_NLS
#include <libintl.h>
#define _(s) dgettext("openconnect", s)
#else
#define _(s) ((char *)(s))
#endif
#define N_(s) s
#include <libxml/tree.h>
#define SHA256_SIZE 32
#define SHA1_SIZE 20
#define MD5_SIZE 16
/* FreeBSD provides this in <sys/param.h> */
#ifndef MAX
#define MAX(x,y) ((x)>(y))?(x):(y)
#endif
#ifndef MIN
#define MIN(x,y) ((x)<(y))?(x):(y)
#endif
/* At least MinGW headers seem not to provide IPPROTO_IPIP */
#ifndef IPPROTO_IPIP
#define IPPROTO_IPIP 0x04
#endif
/****************************************************************************/
struct pkt {
int len;
struct pkt *next;
union {
struct {
uint32_t spi;
uint32_t seq;
unsigned char iv[16];
unsigned char payload[];
} esp;
struct {
unsigned char pad[2];
unsigned char rec[2];
unsigned char kmp[20];
} oncp;
struct {
unsigned char pad[16];
unsigned char hdr[8];
} cstp;
struct {
unsigned char pad[8];
unsigned char hdr[16];
} gpst;
struct {
unsigned char pad[8];
uint32_t vendor;
uint32_t type;
uint32_t len;
uint32_t ident;
} pulse;
};
unsigned char data[];
};
#define REKEY_NONE 0
#define REKEY_TUNNEL 1
#define REKEY_SSL 2
#define KA_NONE 0
#define KA_DPD 1
#define KA_DPD_DEAD 2
#define KA_KEEPALIVE 3
#define KA_REKEY 4
#define DTLS_NOSECRET 0 /* Random secret has not been generated yet */
#define DTLS_SECRET 1 /* Secret is present, ready to attempt DTLS */
#define DTLS_DISABLED 2 /* DTLS was disabled on the *client* side */
#define DTLS_SLEEPING 3 /* For ESP, sometimes sending probes */
#define DTLS_CONNECTING 4 /* ESP probe received; must tell server */
#define DTLS_CONNECTED 5 /* Server informed and should be sending ESP */
#define COMPR_DEFLATE (1<<0)
#define COMPR_LZS (1<<1)
#define COMPR_LZ4 (1<<2)
#define COMPR_LZO (1<<3)
#define COMPR_MAX COMPR_LZO
#ifdef HAVE_LZ4
#define COMPR_STATELESS (COMPR_LZS | COMPR_LZ4 | COMPR_LZO)
#else
#define COMPR_STATELESS (COMPR_LZS)
#endif
#define COMPR_ALL (COMPR_STATELESS | COMPR_DEFLATE)
#define DTLS_APP_ID_EXT 48018
struct keepalive_info {
int dpd;
int keepalive;
int rekey;
int rekey_method;
time_t last_rekey;
time_t last_tx;
time_t last_rx;
time_t last_dpd;
};
struct pin_cache {
struct pin_cache *next;
char *token;
char *pin;
};
struct oc_text_buf {
char *data;
int pos;
int buf_len;
int error;
};
#define TLS_MASTER_KEY_SIZE 48
#define RECONNECT_INTERVAL_MIN 10
#define RECONNECT_INTERVAL_MAX 100
#define REDIR_TYPE_NONE 0
#define REDIR_TYPE_NEWHOST 1
#define REDIR_TYPE_LOCAL 2
#define AUTH_TYPE_GSSAPI 0
#define AUTH_TYPE_NTLM 1
#define AUTH_TYPE_DIGEST 2
#define AUTH_TYPE_BASIC 3
#define AUTH_TYPE_BEARER 4
#define MAX_AUTH_TYPES 5
#define AUTH_DEFAULT_DISABLED -3
#define AUTH_DISABLED -2
#define AUTH_FAILED -1 /* Failed */
#define AUTH_UNSEEN 0 /* Server has not offered it */
#define AUTH_AVAILABLE 1 /* Server has offered it, we have not tried it */
/* Individual auth types may use 2 onwards for their own state */
#define AUTH_IN_PROGRESS 2 /* In-progress attempt */
struct http_auth_state {
int state;
char *challenge;
union {
#ifdef HAVE_GSSAPI
struct {
gss_name_t gss_target_name;
gss_ctx_id_t gss_context;
};
#endif
#ifdef _WIN32
struct {
CredHandle ntlm_sspi_cred;
CtxtHandle ntlm_sspi_ctx;
};
struct {
CredHandle sspi_cred;
CtxtHandle sspi_ctx;
SEC_WCHAR *sspi_target_name;
};
#else
struct {
int ntlm_helper_fd;
};
#endif
};
};
struct vpn_proto {
const char *name;
const char *pretty_name;
const char *description;
const char *secure_cookie;
const char *udp_protocol;
unsigned int flags;
int (*vpn_close_session)(struct openconnect_info *vpninfo, const char *reason);
/* This does the full authentication, calling back as appropriate */
int (*obtain_cookie)(struct openconnect_info *vpninfo);
/* Establish the TCP connection (and obtain configuration) */
int (*tcp_connect)(struct openconnect_info *vpninfo);
int (*tcp_mainloop)(struct openconnect_info *vpninfo, int *timeout, int readable);
/* Add headers common to each HTTP request */
void (*add_http_headers)(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
/* Set up the UDP (DTLS) connection. Doesn't actually *start* it. */
int (*udp_setup)(struct openconnect_info *vpninfo, int attempt_period);
/* This will actually complete the UDP connection setup/handshake on the wire,
as well as transporting packets */
int (*udp_mainloop)(struct openconnect_info *vpninfo, int *timeout, int readable);
/* Close the connection but leave the session setup so it restarts */
void (*udp_close)(struct openconnect_info *vpninfo);
/* Close and destroy the (UDP) session */
void (*udp_shutdown)(struct openconnect_info *vpninfo);
/* Send probe packets to start or maintain the (UDP) session */
int (*udp_send_probes)(struct openconnect_info *vpninfo);
/* Catch probe packet confirming the (UDP) session */
int (*udp_catch_probe)(struct openconnect_info *vpninfo, struct pkt *p);
};
struct pkt_q {
struct pkt *head;
struct pkt **tail;
int count;
};
static inline struct pkt *dequeue_packet(struct pkt_q *q)
{
struct pkt *ret = q->head;
if (ret) {
q->head = ret->next;
if (!--q->count)
q->tail = &q->head;
}
return ret;
}
static inline void requeue_packet(struct pkt_q *q, struct pkt *p)
{
p->next = q->head;
q->head = p;
if (!q->count++)
q->tail = &p->next;
}
static inline int queue_packet(struct pkt_q *q, struct pkt *p)
{
*(q->tail) = p;
p->next = NULL;
q->tail = &p->next;
return ++q->count;
}
static inline void init_pkt_queue(struct pkt_q *q)
{
q->tail = &q->head;
}
#define DTLS_OVERHEAD (1 /* packet + header */ + 13 /* DTLS header */ + \
20 /* biggest supported MAC (SHA1) */ + 32 /* biggest supported IV (AES-256) */ + \
16 /* max padding */)
struct esp {
#if defined(OPENCONNECT_GNUTLS)
gnutls_cipher_hd_t cipher;
gnutls_hmac_hd_t hmac;
#elif defined(OPENCONNECT_OPENSSL)
HMAC_CTX *hmac;
EVP_CIPHER_CTX *cipher;
#endif
uint64_t seq_backlog;
uint64_t seq;
uint32_t spi; /* Stored network-endian */
unsigned char enc_key[0x40]; /* Encryption key */
unsigned char hmac_key[0x40]; /* HMAC key */
unsigned char iv[16];
};
struct oc_pcsc_ctx;
struct oc_tpm1_ctx;
struct oc_tpm2_ctx;
struct openconnect_info {
const struct vpn_proto *proto;
#ifdef HAVE_ICONV
iconv_t ic_legacy_to_utf8;
iconv_t ic_utf8_to_legacy;
#endif
char *redirect_url;
int redirect_type;
unsigned char esp_hmac;
unsigned char esp_enc;
unsigned char esp_compr;
uint32_t esp_replay_protect;
uint32_t esp_lifetime_bytes;
uint32_t esp_lifetime_seconds;
uint32_t esp_ssl_fallback;
int current_esp_in;
int old_esp_maxseq;
struct esp esp_in[2];
struct esp esp_out;
int enc_key_len;
int hmac_key_len;
int hmac_out_len;
uint32_t esp_magic; /* GlobalProtect magic ping address (network-endian) */
int tncc_fd; /* For Juniper TNCC */
char *platname;
char *mobile_platform_version;
char *mobile_device_type;
char *mobile_device_uniqueid;
char *csd_token;
char *csd_ticket;
char *csd_stuburl;
char *csd_starturl;
char *csd_waiturl;
char *csd_preurl;
char *csd_scriptname;
xmlNode *opaque_srvdata;
char *profile_url;
char *profile_sha1;
#ifdef LIBPROXY_HDR
pxProxyFactory *proxy_factory;
#endif
char *proxy_type;
char *proxy;
int proxy_port;
int proxy_fd;
char *proxy_user;
char *proxy_pass;
char *bearer_token;
int proxy_close_during_auth;
int retry_on_auth_fail;
int try_http_auth;
struct http_auth_state http_auth[MAX_AUTH_TYPES];
struct http_auth_state proxy_auth[MAX_AUTH_TYPES];
char *localname;
char *hostname;
char *unique_hostname;
int port;
char *urlpath;
int cert_expire_warning;
char *cert;
char *sslkey;
char *cert_password;
char *cafile;
unsigned no_system_trust;
const char *xmlconfig;
char xmlsha1[(SHA1_SIZE * 2) + 1];
char *authgroup;
int nopasswd;
int xmlpost;
char *dtls_ciphers;
char *dtls12_ciphers;
char *csd_wrapper;
int trojan_interval;
time_t last_trojan;
int no_http_keepalive;
int dump_http_traffic;
int token_mode;
int token_bypassed;
int token_tries;
time_t token_time;
#ifdef HAVE_LIBSTOKEN
struct stoken_ctx *stoken_ctx;
char *stoken_pin;
int stoken_concat_pin;
int stoken_interval;
#endif
#ifdef HAVE_LIBPSKC
pskc_t *pskc;
pskc_key_t *pskc_key;
#endif
char *oath_secret;
size_t oath_secret_len;
enum {
OATH_ALG_HMAC_SHA1 = 0,
OATH_ALG_HMAC_SHA256,
OATH_ALG_HMAC_SHA512,
} oath_hmac_alg;
enum {
HOTP_SECRET_BASE32 = 1,
HOTP_SECRET_RAW,
HOTP_SECRET_HEX,
HOTP_SECRET_PSKC,
} hotp_secret_format; /* We need to give it back in the same form */
#ifdef HAVE_LIBPCSCLITE
struct oc_pcsc_ctx *pcsc;
unsigned char yubikey_pwhash[16];
#endif
openconnect_lock_token_vfn lock_token;
openconnect_unlock_token_vfn unlock_token;
void *tok_cbdata;
void *peer_cert;
/* The SHA1 and SHA256 hashes of the peer's public key */
uint8_t peer_cert_sha1_raw[SHA1_SIZE];
uint8_t peer_cert_sha256_raw[SHA256_SIZE];
/* this value is cache for openconnect_get_peer_cert_hash */
char *peer_cert_hash;
void *cert_list_handle;
int cert_list_size;
char *cookie; /* Pointer to within cookies list */
struct oc_vpn_option *cookies;
struct oc_vpn_option *cstp_options;
struct oc_vpn_option *dtls_options;
struct oc_vpn_option *script_env;
struct oc_vpn_option *csd_env;
unsigned pfs;
unsigned no_tls13;
unsigned allow_insecure_crypto; /* Allow 3DES and RC4 (known-insecure, but the best that some ancient servers can do) */
#if defined(OPENCONNECT_OPENSSL)
#ifdef HAVE_LIBP11
PKCS11_CTX *pkcs11_ctx;
PKCS11_SLOT *pkcs11_slot_list;
unsigned int pkcs11_slot_count;
PKCS11_SLOT *pkcs11_cert_slot;
unsigned char *pkcs11_cert_id;
size_t pkcs11_cert_id_len;
#endif
X509 *cert_x509;
SSL_CTX *https_ctx;
SSL *https_ssl;
BIO_METHOD *ttls_bio_meth;
#elif defined(OPENCONNECT_GNUTLS)
gnutls_session_t https_sess;
gnutls_session_t eap_ttls_sess;
gnutls_certificate_credentials_t https_cred;
gnutls_psk_client_credentials_t psk_cred;
char local_cert_md5[MD5_SIZE * 2 + 1]; /* For CSD */
#ifdef HAVE_TROUSERS
struct oc_tpm1_ctx *tpm1;
#endif
#ifdef HAVE_TSS2
struct oc_tpm2_ctx *tpm2;
#endif
#endif /* OPENCONNECT_GNUTLS */
char ciphersuite_config[256];
struct oc_text_buf *ttls_pushbuf;
uint8_t ttls_eap_ident;
unsigned char *ttls_recvbuf;
int ttls_recvpos;
int ttls_recvlen;
uint32_t ttls_msgleft;
struct pin_cache *pin_cache;
struct keepalive_info ssl_times;
int owe_ssl_dpd_response;
int deflate_pkt_size; /* It may need to be larger than MTU */
struct pkt *deflate_pkt; /* For compressing outbound packets into */
struct pkt *pending_deflated_pkt; /* The original packet associated with above */
struct pkt *current_ssl_pkt; /* Partially sent SSL packet */
struct pkt_q oncp_control_queue; /* Control packets to be sent on oNCP next */
int oncp_rec_size; /* For packetising incoming oNCP stream */
/* Packet buffers for receiving into */
struct pkt *cstp_pkt;
struct pkt *dtls_pkt;
struct pkt *tun_pkt;
int pkt_trailer; /* How many bytes after payload for encryption (ESP HMAC) */
z_stream inflate_strm;
uint32_t inflate_adler32;
z_stream deflate_strm;
uint32_t deflate_adler32;
int disable_ipv6;
int reconnect_timeout;
int reconnect_interval;
int dtls_attempt_period;
time_t auth_expiration;
time_t new_dtls_started;
#if defined(OPENCONNECT_OPENSSL)
SSL_CTX *dtls_ctx;
SSL *dtls_ssl;
#elif defined(OPENCONNECT_GNUTLS)
/* Call this dtls_ssl rather than dtls_sess because it's just a
pointer, and generic code in dtls.c wants to check if it's
NULL or not or pass it to DTLS_SEND/DTLS_RECV. This way we
have fewer ifdefs and accessor macros for it. */
gnutls_session_t dtls_ssl;
#endif
char *cstp_cipher; /* library-dependent description of TLS cipher */
char *dtls_cipher_desc; /* library-dependent description of DTLS cipher, cached for openconnect_get_dtls_cipher() */
int dtls_state;
int dtls_need_reconnect;
struct keepalive_info dtls_times;
unsigned char dtls_session_id[32];
unsigned char dtls_secret[TLS_MASTER_KEY_SIZE];
unsigned char dtls_app_id[32];
unsigned dtls_app_id_size;
uint32_t ift_seq;
int cisco_dtls12; /* If Cisco server sent X-DTLS12-CipherSuite header, rather than X-DTLS-CipherSuite */
char *dtls_cipher; /* Value of aforementioned header (PSK-NEGOTIATE, or an OpenSSL cipher name) */
char *vpnc_script;
#ifndef _WIN32
int uid_csd_given;
uid_t uid_csd;
gid_t gid_csd;
uid_t uid;
gid_t gid;
#endif
int use_tun_script;
int script_tun;
char *ifname;
char *cmd_ifname;
int reqmtu, basemtu; /* Local static configured values */
const char *banner;
struct oc_ip_info ip_info;
int cstp_basemtu; /* Returned by server */
int idle_timeout; /* Returned by server */
#ifdef _WIN32
long dtls_monitored, ssl_monitored, cmd_monitored, tun_monitored;
HANDLE dtls_event, ssl_event, cmd_event;
#else
int _select_nfds;
fd_set _select_rfds;
fd_set _select_wfds;
fd_set _select_efds;
#endif
#ifdef __sun__
int ip_fd;
int ip6_fd;
#endif
#ifdef _WIN32
HANDLE tun_fh;
OVERLAPPED tun_rd_overlap, tun_wr_overlap;
int tun_idx, tun_rd_pending;
#else
int tun_fd;
#endif
int ssl_fd;
int dtls_fd;
int dtls_tos_current;
int dtls_pass_tos;
int dtls_tos_proto, dtls_tos_optname;
int cmd_fd;
int cmd_fd_write;
int got_cancel_cmd;
int got_pause_cmd;
char cancel_type;
struct pkt_q incoming_queue;
struct pkt_q outgoing_queue;
int max_qlen;
struct oc_stats stats;
openconnect_stats_vfn stats_handler;
socklen_t peer_addrlen;
struct sockaddr *peer_addr;
struct sockaddr *dtls_addr;
int dtls_local_port;
int req_compr; /* What we requested */
int cstp_compr; /* Accepted for CSTP */
int dtls_compr; /* Accepted for DTLS */
int is_dyndns; /* Attempt to redo DNS lookup on each CSTP reconnect */
char *useragent;
char *version_string;
const char *quit_reason;
const char *delay_tunnel_reason; /* If non-null, provides a reason why protocol is not yet ready for tunnel setup */
enum {
NO_DELAY_CLOSE = 0,
DELAY_CLOSE_WAIT,
DELAY_CLOSE_IMMEDIATE_CALLBACK,
} delay_close; /* Delay close of mainloop */
int verbose;
void *cbdata;
openconnect_validate_peer_cert_vfn validate_peer_cert;
openconnect_write_new_config_vfn write_new_config;
openconnect_process_auth_form_vfn process_auth_form;
openconnect_progress_vfn progress;
openconnect_protect_socket_vfn protect_socket;
openconnect_getaddrinfo_vfn getaddrinfo_override;
openconnect_setup_tun_vfn setup_tun;
openconnect_reconnected_vfn reconnected;
int (*ssl_read)(struct openconnect_info *vpninfo, char *buf, size_t len);
int (*ssl_gets)(struct openconnect_info *vpninfo, char *buf, size_t len);
int (*ssl_write)(struct openconnect_info *vpninfo, char *buf, size_t len);
};
#ifdef _WIN32
#define monitor_read_fd(_v, _n) _v->_n##_monitored |= FD_READ
#define monitor_write_fd(_v, _n) _v->_n##_monitored |= FD_WRITE
#define monitor_except_fd(_v, _n) _v->_n##_monitored |= FD_CLOSE
#define unmonitor_read_fd(_v, _n) _v->_n##_monitored &= ~FD_READ
#define unmonitor_write_fd(_v, _n) _v->_n##_monitored &= ~FD_WRITE
#define unmonitor_except_fd(_v, _n) _v->_n##_monitored &= ~FD_CLOSE
#define monitor_fd_new(_v, _n) do { if (!_v->_n##_event) _v->_n##_event = CreateEvent(NULL, FALSE, FALSE, NULL); } while (0)
#define read_fd_monitored(_v, _n) (_v->_n##_monitored & FD_READ)
#else
#define monitor_read_fd(_v, _n) FD_SET(_v-> _n##_fd, &vpninfo->_select_rfds)
#define unmonitor_read_fd(_v, _n) FD_CLR(_v-> _n##_fd, &vpninfo->_select_rfds)
#define monitor_write_fd(_v, _n) FD_SET(_v-> _n##_fd, &vpninfo->_select_wfds)
#define unmonitor_write_fd(_v, _n) FD_CLR(_v-> _n##_fd, &vpninfo->_select_wfds)
#define monitor_except_fd(_v, _n) FD_SET(_v-> _n##_fd, &vpninfo->_select_efds)
#define unmonitor_except_fd(_v, _n) FD_CLR(_v-> _n##_fd, &vpninfo->_select_efds)
#define monitor_fd_new(_v, _n) do { \
if (_v->_select_nfds <= vpninfo->_n##_fd) \
vpninfo->_select_nfds = vpninfo->_n##_fd + 1; \
} while (0)
#define read_fd_monitored(_v, _n) FD_ISSET(_v->_n##_fd, &_v->_select_rfds)
#endif
/* Key material for DTLS-PSK */
#define PSK_LABEL "EXPORTER-openconnect-psk"
#define PSK_LABEL_SIZE sizeof(PSK_LABEL)-1
#define PSK_KEY_SIZE 32
/* Packet types */
#define AC_PKT_DATA 0 /* Uncompressed data */
#define AC_PKT_DPD_OUT 3 /* Dead Peer Detection */
#define AC_PKT_DPD_RESP 4 /* DPD response */
#define AC_PKT_DISCONN 5 /* Client disconnection notice */
#define AC_PKT_KEEPALIVE 7 /* Keepalive */
#define AC_PKT_COMPRESSED 8 /* Compressed data */
#define AC_PKT_TERM_SERVER 9 /* Server kick */
/* Encryption and HMAC algorithms (matching Juniper/Pulse binary encoding) */
#define ENC_AES_128_CBC 2
#define ENC_AES_256_CBC 5
#define HMAC_MD5 1
#define HMAC_SHA1 2
#define HMAC_SHA256 3
#define MAX_HMAC_SIZE 32 /* SHA256 */
#define MAX_IV_SIZE 16
#define MAX_ESP_PAD 17 /* Including the next-header field */
#define vpn_progress(_v, lvl, ...) do { \
if ((_v)->verbose >= (lvl)) \
(_v)->progress((_v)->cbdata, lvl, __VA_ARGS__); \
} while(0)
#define vpn_perror(vpninfo, msg) vpn_progress((vpninfo), PRG_ERR, "%s: %s\n", (msg), strerror(errno))
/****************************************************************************/
/* Oh Solaris how we hate thee! */
#ifdef HAVE_SUNOS_BROKEN_TIME
#define time(x) openconnect__time(x)
time_t openconnect__time(time_t *t);
#endif
#ifndef HAVE_VASPRINTF
#define vasprintf openconnect__vasprintf
int openconnect__vasprintf(char **strp, const char *fmt, va_list ap);
#endif
#ifndef HAVE_ASPRINTF
#define asprintf openconnect__asprintf
int openconnect__asprintf(char **strp, const char *fmt, ...);
#endif
#ifndef HAVE_GETLINE
#define getline openconnect__getline
ssize_t openconnect__getline(char **lineptr, size_t *n, FILE *stream);
#endif
#ifndef HAVE_STRCASESTR
#define strcasestr openconnect__strcasestr
char *openconnect__strcasestr(const char *haystack, const char *needle);
#endif
#ifndef HAVE_STRNDUP
#undef strndup
#define strndup openconnect__strndup
char *openconnect__strndup(const char *s, size_t n);
#endif
#ifndef HAVE_INET_ATON
#define inet_aton openconnect__inet_aton
int openconnect__inet_aton(const char *cp, struct in_addr *addr);
#endif
static inline int set_sock_nonblock(int fd)
{
#ifdef _WIN32
unsigned long mode = 1;
return ioctlsocket(fd, FIONBIO, &mode);
#else
return fcntl(fd, F_SETFL, fcntl(fd, F_GETFL) | O_NONBLOCK);
#endif
}
static inline int set_fd_cloexec(int fd)
{
#ifdef _WIN32
return 0; /* Windows has O_INHERIT but... */
#else
int ret = fcntl(fd, F_SETFD, fcntl(fd, F_GETFD) | FD_CLOEXEC);
/*
* Coverity gets really sad if we don't check the error here.
* But really, we're doing this to be a 'good citizen' when
* running as a library, and we aren't even going to bother
* printing a debug message if it fails. We just don't care.
*/
if (ret)
return ret;
return 0;
#endif
}
static inline int tun_is_up(struct openconnect_info *vpninfo)
{
#ifdef _WIN32
return vpninfo->tun_fh != NULL;
#else
return vpninfo->tun_fd != -1;
#endif
}
#ifdef _WIN32
#define pipe(fds) _pipe(fds, 4096, O_BINARY)
int openconnect__win32_sock_init();
char *openconnect__win32_strerror(DWORD err);
#undef setenv
#define setenv openconnect__win32_setenv
int openconnect__win32_setenv(const char *name, const char *value, int overwrite);
#undef inet_pton
#define inet_pton openconnect__win32_inet_pton
int openconnect__win32_inet_pton(int af, const char *src, void *dst);
#define OPENCONNECT_CMD_SOCKET SOCKET
OPENCONNECT_CMD_SOCKET dumb_socketpair(OPENCONNECT_CMD_SOCKET socks[2], int make_overlapped);
#else
#define closesocket close
#define OPENCONNECT_CMD_SOCKET int
#ifndef O_BINARY
#define O_BINARY 0
#endif
#endif
/* For systems that don't support O_CLOEXEC, just don't bother.
We don't keep files open for long anyway. */
#ifndef O_CLOEXEC
#define O_CLOEXEC 0
#endif
/* I always coded as if it worked like this. Now it does. */
#define realloc_inplace(p, size) do { \
void *__realloc_old = p; \
p = realloc(p, size); \
if (size && !p) \
free(__realloc_old); \
} while (0)
/****************************************************************************/
/* iconv.c */
#ifdef HAVE_ICONV
char *openconnect_utf8_to_legacy(struct openconnect_info *vpninfo, const char *utf8);
char *openconnect_legacy_to_utf8(struct openconnect_info *vpninfo, const char *legacy);
#else
#define openconnect_utf8_to_legacy(v, str) ((char *)str)
#define openconnect_legacy_to_utf8(v, str) ((char *)str)
#endif
/* script.c */
unsigned char unhex(const char *data);
int script_setenv(struct openconnect_info *vpninfo, const char *opt, const char *val, int trunc, int append);
int script_setenv_int(struct openconnect_info *vpninfo, const char *opt, int value);
void prepare_script_env(struct openconnect_info *vpninfo);
int script_config_tun(struct openconnect_info *vpninfo, const char *reason);
int apply_script_env(struct oc_vpn_option *envs);
void free_split_routes(struct openconnect_info *vpninfo);
/* tun.c / tun-win32.c */
void os_shutdown_tun(struct openconnect_info *vpninfo);
int os_read_tun(struct openconnect_info *vpninfo, struct pkt *pkt);
int os_write_tun(struct openconnect_info *vpninfo, struct pkt *pkt);
intptr_t os_setup_tun(struct openconnect_info *vpninfo);
/* {gnutls,openssl}-dtls.c */
int start_dtls_handshake(struct openconnect_info *vpninfo, int dtls_fd);
int dtls_try_handshake(struct openconnect_info *vpninfo);
unsigned dtls_set_mtu(struct openconnect_info *vpninfo, unsigned mtu);
void dtls_ssl_free(struct openconnect_info *vpninfo);
void *establish_eap_ttls(struct openconnect_info *vpninfo);
void destroy_eap_ttls(struct openconnect_info *vpninfo, void *sess);
/* dtls.c */
int dtls_setup(struct openconnect_info *vpninfo, int dtls_attempt_period);
int udp_tos_update(struct openconnect_info *vpninfo, struct pkt *pkt);
int dtls_mainloop(struct openconnect_info *vpninfo, int *timeout, int readable);
void dtls_close(struct openconnect_info *vpninfo);
void dtls_shutdown(struct openconnect_info *vpninfo);
void gather_dtls_ciphers(struct openconnect_info *vpninfo, struct oc_text_buf *buf, struct oc_text_buf *buf12);
void dtls_detect_mtu(struct openconnect_info *vpninfo);
int openconnect_dtls_read(struct openconnect_info *vpninfo, void *buf, size_t len, unsigned ms);
int openconnect_dtls_write(struct openconnect_info *vpninfo, void *buf, size_t len);
char *openconnect_bin2hex(const char *prefix, const uint8_t *data, unsigned len);
char *openconnect_bin2base64(const char *prefix, const uint8_t *data, unsigned len);
/* cstp.c */
int check_address_sanity(struct openconnect_info *vpninfo, const char *old_addr, const char *old_netmask, const char *old_addr6, const char *old_netmask6);
void cstp_common_headers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
int cstp_connect(struct openconnect_info *vpninfo);
int cstp_mainloop(struct openconnect_info *vpninfo, int *timeout, int readable);
int cstp_bye(struct openconnect_info *vpninfo, const char *reason);
int decompress_and_queue_packet(struct openconnect_info *vpninfo, int compr_type,
unsigned char *buf, int len);
int compress_packet(struct openconnect_info *vpninfo, int compr_type, struct pkt *this);
/* auth-juniper.c */
int oncp_obtain_cookie(struct openconnect_info *vpninfo);
int oncp_send_tncc_command(struct openconnect_info *vpninfo, int first);
void oncp_common_headers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
/* oncp.c */
int oncp_connect(struct openconnect_info *vpninfo);
int oncp_mainloop(struct openconnect_info *vpninfo, int *timeout, int readable);
int oncp_bye(struct openconnect_info *vpninfo, const char *reason);
void oncp_esp_close(struct openconnect_info *vpninfo);
int oncp_esp_send_probes(struct openconnect_info *vpninfo);
int oncp_esp_catch_probe(struct openconnect_info *vpninfo, struct pkt *pkt);
/* pulse.c */
int pulse_obtain_cookie(struct openconnect_info *vpninfo);
void pulse_common_headers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
int pulse_connect(struct openconnect_info *vpninfo);
int pulse_mainloop(struct openconnect_info *vpninfo, int *timeout, int readable);
int pulse_bye(struct openconnect_info *vpninfo, const char *reason);
int pulse_eap_ttls_send(struct openconnect_info *vpninfo, const void *data, int len);
int pulse_eap_ttls_recv(struct openconnect_info *vpninfo, void *data, int len);
/* auth-globalprotect.c */
int gpst_obtain_cookie(struct openconnect_info *vpninfo);
void gpst_common_headers(struct openconnect_info *vpninfo, struct oc_text_buf *buf);
int gpst_bye(struct openconnect_info *vpninfo, const char *reason);
const char *gpst_os_name(struct openconnect_info *vpninfo);
/* gpst.c */
int gpst_xml_or_error(struct openconnect_info *vpninfo, char *response,
int (*xml_cb)(struct openconnect_info *, xmlNode *xml_node, void *cb_data),
int (*challenge_cb)(struct openconnect_info *, char *prompt, char *inputStr, void *cb_data),
void *cb_data);
int gpst_setup(struct openconnect_info *vpninfo);
int gpst_mainloop(struct openconnect_info *vpninfo, int *timeout, int readable);
int gpst_esp_send_probes(struct openconnect_info *vpninfo);
int gpst_esp_catch_probe(struct openconnect_info *vpninfo, struct pkt *pkt);
/* lzs.c */
int lzs_decompress(unsigned char *dst, int dstlen, const unsigned char *src, int srclen);
int lzs_compress(unsigned char *dst, int dstlen, const unsigned char *src, int srclen);
/* ssl.c */
unsigned string_is_hostname(const char* str);
int connect_https_socket(struct openconnect_info *vpninfo);
int __attribute__ ((format(printf, 4, 5)))
request_passphrase(struct openconnect_info *vpninfo, const char *label,
char **response, const char *fmt, ...);
int __attribute__ ((format (printf, 2, 3)))
openconnect_SSL_printf(struct openconnect_info *vpninfo, const char *fmt, ...);
int openconnect_print_err_cb(const char *str, size_t len, void *ptr);
#define openconnect_report_ssl_errors(v) ERR_print_errors_cb(openconnect_print_err_cb, (v))
#if defined(FAKE_ANDROID_KEYSTORE) || defined(__ANDROID__)
#define ANDROID_KEYSTORE
#endif
#ifdef ANDROID_KEYSTORE
const char *keystore_strerror(int err);
int keystore_fetch(const char *key, unsigned char **result);
#endif
void cmd_fd_set(struct openconnect_info *vpninfo, fd_set *fds, int *maxfd);
void check_cmd_fd(struct openconnect_info *vpninfo, fd_set *fds);
int is_cancel_pending(struct openconnect_info *vpninfo, fd_set *fds);
void poll_cmd_fd(struct openconnect_info *vpninfo, int timeout);
int openconnect_open_utf8(struct openconnect_info *vpninfo,
const char *fname, int mode);
FILE *openconnect_fopen_utf8(struct openconnect_info *vpninfo,
const char *fname, const char *mode);
ssize_t openconnect_read_file(struct openconnect_info *vpninfo, const char *fname,
char **ptr);
int udp_sockaddr(struct openconnect_info *vpninfo, int port);
int udp_connect(struct openconnect_info *vpninfo);
int ssl_reconnect(struct openconnect_info *vpninfo);
void openconnect_clear_cookies(struct openconnect_info *vpninfo);
int cancellable_gets(struct openconnect_info *vpninfo, int fd,
char *buf, size_t len);
int cancellable_send(struct openconnect_info *vpninfo, int fd,
char *buf, size_t len);