bio.h 34 KB

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  1. /*
  2. * Copyright 1995-2020 The OpenSSL Project Authors. All Rights Reserved.
  3. *
  4. * Licensed under the OpenSSL license (the "License"). You may not use
  5. * this file except in compliance with the License. You can obtain a copy
  6. * in the file LICENSE in the source distribution or at
  7. * https://www.openssl.org/source/license.html
  8. */
  9. #ifndef HEADER_BIO_H
  10. # define HEADER_BIO_H
  11. # include <openssl/e_os2.h>
  12. # ifndef OPENSSL_NO_STDIO
  13. # include <stdio.h>
  14. # endif
  15. # include <stdarg.h>
  16. # include <openssl/crypto.h>
  17. # include <openssl/bioerr.h>
  18. #ifdef __cplusplus
  19. extern "C" {
  20. #endif
  21. /* There are the classes of BIOs */
  22. # define BIO_TYPE_DESCRIPTOR 0x0100 /* socket, fd, connect or accept */
  23. # define BIO_TYPE_FILTER 0x0200
  24. # define BIO_TYPE_SOURCE_SINK 0x0400
  25. /* These are the 'types' of BIOs */
  26. # define BIO_TYPE_NONE 0
  27. # define BIO_TYPE_MEM ( 1|BIO_TYPE_SOURCE_SINK)
  28. # define BIO_TYPE_FILE ( 2|BIO_TYPE_SOURCE_SINK)
  29. # define BIO_TYPE_FD ( 4|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
  30. # define BIO_TYPE_SOCKET ( 5|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
  31. # define BIO_TYPE_NULL ( 6|BIO_TYPE_SOURCE_SINK)
  32. # define BIO_TYPE_SSL ( 7|BIO_TYPE_FILTER)
  33. # define BIO_TYPE_MD ( 8|BIO_TYPE_FILTER)
  34. # define BIO_TYPE_BUFFER ( 9|BIO_TYPE_FILTER)
  35. # define BIO_TYPE_CIPHER (10|BIO_TYPE_FILTER)
  36. # define BIO_TYPE_BASE64 (11|BIO_TYPE_FILTER)
  37. # define BIO_TYPE_CONNECT (12|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
  38. # define BIO_TYPE_ACCEPT (13|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
  39. # define BIO_TYPE_NBIO_TEST (16|BIO_TYPE_FILTER)/* server proxy BIO */
  40. # define BIO_TYPE_NULL_FILTER (17|BIO_TYPE_FILTER)
  41. # define BIO_TYPE_BIO (19|BIO_TYPE_SOURCE_SINK)/* half a BIO pair */
  42. # define BIO_TYPE_LINEBUFFER (20|BIO_TYPE_FILTER)
  43. # define BIO_TYPE_DGRAM (21|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
  44. # define BIO_TYPE_ASN1 (22|BIO_TYPE_FILTER)
  45. # define BIO_TYPE_COMP (23|BIO_TYPE_FILTER)
  46. # ifndef OPENSSL_NO_SCTP
  47. # define BIO_TYPE_DGRAM_SCTP (24|BIO_TYPE_SOURCE_SINK|BIO_TYPE_DESCRIPTOR)
  48. # endif
  49. #define BIO_TYPE_START 128
  50. /*
  51. * BIO_FILENAME_READ|BIO_CLOSE to open or close on free.
  52. * BIO_set_fp(in,stdin,BIO_NOCLOSE);
  53. */
  54. # define BIO_NOCLOSE 0x00
  55. # define BIO_CLOSE 0x01
  56. /*
  57. * These are used in the following macros and are passed to BIO_ctrl()
  58. */
  59. # define BIO_CTRL_RESET 1/* opt - rewind/zero etc */
  60. # define BIO_CTRL_EOF 2/* opt - are we at the eof */
  61. # define BIO_CTRL_INFO 3/* opt - extra tit-bits */
  62. # define BIO_CTRL_SET 4/* man - set the 'IO' type */
  63. # define BIO_CTRL_GET 5/* man - get the 'IO' type */
  64. # define BIO_CTRL_PUSH 6/* opt - internal, used to signify change */
  65. # define BIO_CTRL_POP 7/* opt - internal, used to signify change */
  66. # define BIO_CTRL_GET_CLOSE 8/* man - set the 'close' on free */
  67. # define BIO_CTRL_SET_CLOSE 9/* man - set the 'close' on free */
  68. # define BIO_CTRL_PENDING 10/* opt - is their more data buffered */
  69. # define BIO_CTRL_FLUSH 11/* opt - 'flush' buffered output */
  70. # define BIO_CTRL_DUP 12/* man - extra stuff for 'duped' BIO */
  71. # define BIO_CTRL_WPENDING 13/* opt - number of bytes still to write */
  72. # define BIO_CTRL_SET_CALLBACK 14/* opt - set callback function */
  73. # define BIO_CTRL_GET_CALLBACK 15/* opt - set callback function */
  74. # define BIO_CTRL_PEEK 29/* BIO_f_buffer special */
  75. # define BIO_CTRL_SET_FILENAME 30/* BIO_s_file special */
  76. /* dgram BIO stuff */
  77. # define BIO_CTRL_DGRAM_CONNECT 31/* BIO dgram special */
  78. # define BIO_CTRL_DGRAM_SET_CONNECTED 32/* allow for an externally connected
  79. * socket to be passed in */
  80. # define BIO_CTRL_DGRAM_SET_RECV_TIMEOUT 33/* setsockopt, essentially */
  81. # define BIO_CTRL_DGRAM_GET_RECV_TIMEOUT 34/* getsockopt, essentially */
  82. # define BIO_CTRL_DGRAM_SET_SEND_TIMEOUT 35/* setsockopt, essentially */
  83. # define BIO_CTRL_DGRAM_GET_SEND_TIMEOUT 36/* getsockopt, essentially */
  84. # define BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP 37/* flag whether the last */
  85. # define BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP 38/* I/O operation tiemd out */
  86. /* #ifdef IP_MTU_DISCOVER */
  87. # define BIO_CTRL_DGRAM_MTU_DISCOVER 39/* set DF bit on egress packets */
  88. /* #endif */
  89. # define BIO_CTRL_DGRAM_QUERY_MTU 40/* as kernel for current MTU */
  90. # define BIO_CTRL_DGRAM_GET_FALLBACK_MTU 47
  91. # define BIO_CTRL_DGRAM_GET_MTU 41/* get cached value for MTU */
  92. # define BIO_CTRL_DGRAM_SET_MTU 42/* set cached value for MTU.
  93. * want to use this if asking
  94. * the kernel fails */
  95. # define BIO_CTRL_DGRAM_MTU_EXCEEDED 43/* check whether the MTU was
  96. * exceed in the previous write
  97. * operation */
  98. # define BIO_CTRL_DGRAM_GET_PEER 46
  99. # define BIO_CTRL_DGRAM_SET_PEER 44/* Destination for the data */
  100. # define BIO_CTRL_DGRAM_SET_NEXT_TIMEOUT 45/* Next DTLS handshake timeout
  101. * to adjust socket timeouts */
  102. # define BIO_CTRL_DGRAM_SET_DONT_FRAG 48
  103. # define BIO_CTRL_DGRAM_GET_MTU_OVERHEAD 49
  104. /* Deliberately outside of OPENSSL_NO_SCTP - used in bss_dgram.c */
  105. # define BIO_CTRL_DGRAM_SCTP_SET_IN_HANDSHAKE 50
  106. # ifndef OPENSSL_NO_SCTP
  107. /* SCTP stuff */
  108. # define BIO_CTRL_DGRAM_SCTP_ADD_AUTH_KEY 51
  109. # define BIO_CTRL_DGRAM_SCTP_NEXT_AUTH_KEY 52
  110. # define BIO_CTRL_DGRAM_SCTP_AUTH_CCS_RCVD 53
  111. # define BIO_CTRL_DGRAM_SCTP_GET_SNDINFO 60
  112. # define BIO_CTRL_DGRAM_SCTP_SET_SNDINFO 61
  113. # define BIO_CTRL_DGRAM_SCTP_GET_RCVINFO 62
  114. # define BIO_CTRL_DGRAM_SCTP_SET_RCVINFO 63
  115. # define BIO_CTRL_DGRAM_SCTP_GET_PRINFO 64
  116. # define BIO_CTRL_DGRAM_SCTP_SET_PRINFO 65
  117. # define BIO_CTRL_DGRAM_SCTP_SAVE_SHUTDOWN 70
  118. # endif
  119. # define BIO_CTRL_DGRAM_SET_PEEK_MODE 71
  120. /* modifiers */
  121. # define BIO_FP_READ 0x02
  122. # define BIO_FP_WRITE 0x04
  123. # define BIO_FP_APPEND 0x08
  124. # define BIO_FP_TEXT 0x10
  125. # define BIO_FLAGS_READ 0x01
  126. # define BIO_FLAGS_WRITE 0x02
  127. # define BIO_FLAGS_IO_SPECIAL 0x04
  128. # define BIO_FLAGS_RWS (BIO_FLAGS_READ|BIO_FLAGS_WRITE|BIO_FLAGS_IO_SPECIAL)
  129. # define BIO_FLAGS_SHOULD_RETRY 0x08
  130. # ifndef BIO_FLAGS_UPLINK
  131. /*
  132. * "UPLINK" flag denotes file descriptors provided by application. It
  133. * defaults to 0, as most platforms don't require UPLINK interface.
  134. */
  135. # define BIO_FLAGS_UPLINK 0
  136. # endif
  137. # define BIO_FLAGS_BASE64_NO_NL 0x100
  138. /*
  139. * This is used with memory BIOs:
  140. * BIO_FLAGS_MEM_RDONLY means we shouldn't free up or change the data in any way;
  141. * BIO_FLAGS_NONCLEAR_RST means we shouldn't clear data on reset.
  142. */
  143. # define BIO_FLAGS_MEM_RDONLY 0x200
  144. # define BIO_FLAGS_NONCLEAR_RST 0x400
  145. # define BIO_FLAGS_IN_EOF 0x800
  146. typedef union bio_addr_st BIO_ADDR;
  147. typedef struct bio_addrinfo_st BIO_ADDRINFO;
  148. int BIO_get_new_index(void);
  149. void BIO_set_flags(BIO *b, int flags);
  150. int BIO_test_flags(const BIO *b, int flags);
  151. void BIO_clear_flags(BIO *b, int flags);
  152. # define BIO_get_flags(b) BIO_test_flags(b, ~(0x0))
  153. # define BIO_set_retry_special(b) \
  154. BIO_set_flags(b, (BIO_FLAGS_IO_SPECIAL|BIO_FLAGS_SHOULD_RETRY))
  155. # define BIO_set_retry_read(b) \
  156. BIO_set_flags(b, (BIO_FLAGS_READ|BIO_FLAGS_SHOULD_RETRY))
  157. # define BIO_set_retry_write(b) \
  158. BIO_set_flags(b, (BIO_FLAGS_WRITE|BIO_FLAGS_SHOULD_RETRY))
  159. /* These are normally used internally in BIOs */
  160. # define BIO_clear_retry_flags(b) \
  161. BIO_clear_flags(b, (BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY))
  162. # define BIO_get_retry_flags(b) \
  163. BIO_test_flags(b, (BIO_FLAGS_RWS|BIO_FLAGS_SHOULD_RETRY))
  164. /* These should be used by the application to tell why we should retry */
  165. # define BIO_should_read(a) BIO_test_flags(a, BIO_FLAGS_READ)
  166. # define BIO_should_write(a) BIO_test_flags(a, BIO_FLAGS_WRITE)
  167. # define BIO_should_io_special(a) BIO_test_flags(a, BIO_FLAGS_IO_SPECIAL)
  168. # define BIO_retry_type(a) BIO_test_flags(a, BIO_FLAGS_RWS)
  169. # define BIO_should_retry(a) BIO_test_flags(a, BIO_FLAGS_SHOULD_RETRY)
  170. /*
  171. * The next three are used in conjunction with the BIO_should_io_special()
  172. * condition. After this returns true, BIO *BIO_get_retry_BIO(BIO *bio, int
  173. * *reason); will walk the BIO stack and return the 'reason' for the special
  174. * and the offending BIO. Given a BIO, BIO_get_retry_reason(bio) will return
  175. * the code.
  176. */
  177. /*
  178. * Returned from the SSL bio when the certificate retrieval code had an error
  179. */
  180. # define BIO_RR_SSL_X509_LOOKUP 0x01
  181. /* Returned from the connect BIO when a connect would have blocked */
  182. # define BIO_RR_CONNECT 0x02
  183. /* Returned from the accept BIO when an accept would have blocked */
  184. # define BIO_RR_ACCEPT 0x03
  185. /* These are passed by the BIO callback */
  186. # define BIO_CB_FREE 0x01
  187. # define BIO_CB_READ 0x02
  188. # define BIO_CB_WRITE 0x03
  189. # define BIO_CB_PUTS 0x04
  190. # define BIO_CB_GETS 0x05
  191. # define BIO_CB_CTRL 0x06
  192. /*
  193. * The callback is called before and after the underling operation, The
  194. * BIO_CB_RETURN flag indicates if it is after the call
  195. */
  196. # define BIO_CB_RETURN 0x80
  197. # define BIO_CB_return(a) ((a)|BIO_CB_RETURN)
  198. # define BIO_cb_pre(a) (!((a)&BIO_CB_RETURN))
  199. # define BIO_cb_post(a) ((a)&BIO_CB_RETURN)
  200. typedef long (*BIO_callback_fn)(BIO *b, int oper, const char *argp, int argi,
  201. long argl, long ret);
  202. typedef long (*BIO_callback_fn_ex)(BIO *b, int oper, const char *argp,
  203. size_t len, int argi,
  204. long argl, int ret, size_t *processed);
  205. BIO_callback_fn BIO_get_callback(const BIO *b);
  206. void BIO_set_callback(BIO *b, BIO_callback_fn callback);
  207. BIO_callback_fn_ex BIO_get_callback_ex(const BIO *b);
  208. void BIO_set_callback_ex(BIO *b, BIO_callback_fn_ex callback);
  209. char *BIO_get_callback_arg(const BIO *b);
  210. void BIO_set_callback_arg(BIO *b, char *arg);
  211. typedef struct bio_method_st BIO_METHOD;
  212. const char *BIO_method_name(const BIO *b);
  213. int BIO_method_type(const BIO *b);
  214. typedef int BIO_info_cb(BIO *, int, int);
  215. typedef BIO_info_cb bio_info_cb; /* backward compatibility */
  216. DEFINE_STACK_OF(BIO)
  217. /* Prefix and suffix callback in ASN1 BIO */
  218. typedef int asn1_ps_func (BIO *b, unsigned char **pbuf, int *plen,
  219. void *parg);
  220. # ifndef OPENSSL_NO_SCTP
  221. /* SCTP parameter structs */
  222. struct bio_dgram_sctp_sndinfo {
  223. uint16_t snd_sid;
  224. uint16_t snd_flags;
  225. uint32_t snd_ppid;
  226. uint32_t snd_context;
  227. };
  228. struct bio_dgram_sctp_rcvinfo {
  229. uint16_t rcv_sid;
  230. uint16_t rcv_ssn;
  231. uint16_t rcv_flags;
  232. uint32_t rcv_ppid;
  233. uint32_t rcv_tsn;
  234. uint32_t rcv_cumtsn;
  235. uint32_t rcv_context;
  236. };
  237. struct bio_dgram_sctp_prinfo {
  238. uint16_t pr_policy;
  239. uint32_t pr_value;
  240. };
  241. # endif
  242. /*
  243. * #define BIO_CONN_get_param_hostname BIO_ctrl
  244. */
  245. # define BIO_C_SET_CONNECT 100
  246. # define BIO_C_DO_STATE_MACHINE 101
  247. # define BIO_C_SET_NBIO 102
  248. /* # define BIO_C_SET_PROXY_PARAM 103 */
  249. # define BIO_C_SET_FD 104
  250. # define BIO_C_GET_FD 105
  251. # define BIO_C_SET_FILE_PTR 106
  252. # define BIO_C_GET_FILE_PTR 107
  253. # define BIO_C_SET_FILENAME 108
  254. # define BIO_C_SET_SSL 109
  255. # define BIO_C_GET_SSL 110
  256. # define BIO_C_SET_MD 111
  257. # define BIO_C_GET_MD 112
  258. # define BIO_C_GET_CIPHER_STATUS 113
  259. # define BIO_C_SET_BUF_MEM 114
  260. # define BIO_C_GET_BUF_MEM_PTR 115
  261. # define BIO_C_GET_BUFF_NUM_LINES 116
  262. # define BIO_C_SET_BUFF_SIZE 117
  263. # define BIO_C_SET_ACCEPT 118
  264. # define BIO_C_SSL_MODE 119
  265. # define BIO_C_GET_MD_CTX 120
  266. /* # define BIO_C_GET_PROXY_PARAM 121 */
  267. # define BIO_C_SET_BUFF_READ_DATA 122/* data to read first */
  268. # define BIO_C_GET_CONNECT 123
  269. # define BIO_C_GET_ACCEPT 124
  270. # define BIO_C_SET_SSL_RENEGOTIATE_BYTES 125
  271. # define BIO_C_GET_SSL_NUM_RENEGOTIATES 126
  272. # define BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT 127
  273. # define BIO_C_FILE_SEEK 128
  274. # define BIO_C_GET_CIPHER_CTX 129
  275. # define BIO_C_SET_BUF_MEM_EOF_RETURN 130/* return end of input
  276. * value */
  277. # define BIO_C_SET_BIND_MODE 131
  278. # define BIO_C_GET_BIND_MODE 132
  279. # define BIO_C_FILE_TELL 133
  280. # define BIO_C_GET_SOCKS 134
  281. # define BIO_C_SET_SOCKS 135
  282. # define BIO_C_SET_WRITE_BUF_SIZE 136/* for BIO_s_bio */
  283. # define BIO_C_GET_WRITE_BUF_SIZE 137
  284. # define BIO_C_MAKE_BIO_PAIR 138
  285. # define BIO_C_DESTROY_BIO_PAIR 139
  286. # define BIO_C_GET_WRITE_GUARANTEE 140
  287. # define BIO_C_GET_READ_REQUEST 141
  288. # define BIO_C_SHUTDOWN_WR 142
  289. # define BIO_C_NREAD0 143
  290. # define BIO_C_NREAD 144
  291. # define BIO_C_NWRITE0 145
  292. # define BIO_C_NWRITE 146
  293. # define BIO_C_RESET_READ_REQUEST 147
  294. # define BIO_C_SET_MD_CTX 148
  295. # define BIO_C_SET_PREFIX 149
  296. # define BIO_C_GET_PREFIX 150
  297. # define BIO_C_SET_SUFFIX 151
  298. # define BIO_C_GET_SUFFIX 152
  299. # define BIO_C_SET_EX_ARG 153
  300. # define BIO_C_GET_EX_ARG 154
  301. # define BIO_C_SET_CONNECT_MODE 155
  302. # define BIO_set_app_data(s,arg) BIO_set_ex_data(s,0,arg)
  303. # define BIO_get_app_data(s) BIO_get_ex_data(s,0)
  304. # define BIO_set_nbio(b,n) BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL)
  305. # ifndef OPENSSL_NO_SOCK
  306. /* IP families we support, for BIO_s_connect() and BIO_s_accept() */
  307. /* Note: the underlying operating system may not support some of them */
  308. # define BIO_FAMILY_IPV4 4
  309. # define BIO_FAMILY_IPV6 6
  310. # define BIO_FAMILY_IPANY 256
  311. /* BIO_s_connect() */
  312. # define BIO_set_conn_hostname(b,name) BIO_ctrl(b,BIO_C_SET_CONNECT,0, \
  313. (char *)(name))
  314. # define BIO_set_conn_port(b,port) BIO_ctrl(b,BIO_C_SET_CONNECT,1, \
  315. (char *)(port))
  316. # define BIO_set_conn_address(b,addr) BIO_ctrl(b,BIO_C_SET_CONNECT,2, \
  317. (char *)(addr))
  318. # define BIO_set_conn_ip_family(b,f) BIO_int_ctrl(b,BIO_C_SET_CONNECT,3,f)
  319. # define BIO_get_conn_hostname(b) ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,0))
  320. # define BIO_get_conn_port(b) ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,1))
  321. # define BIO_get_conn_address(b) ((const BIO_ADDR *)BIO_ptr_ctrl(b,BIO_C_GET_CONNECT,2))
  322. # define BIO_get_conn_ip_family(b) BIO_ctrl(b,BIO_C_GET_CONNECT,3,NULL)
  323. # define BIO_set_conn_mode(b,n) BIO_ctrl(b,BIO_C_SET_CONNECT_MODE,(n),NULL)
  324. /* BIO_s_accept() */
  325. # define BIO_set_accept_name(b,name) BIO_ctrl(b,BIO_C_SET_ACCEPT,0, \
  326. (char *)(name))
  327. # define BIO_set_accept_port(b,port) BIO_ctrl(b,BIO_C_SET_ACCEPT,1, \
  328. (char *)(port))
  329. # define BIO_get_accept_name(b) ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,0))
  330. # define BIO_get_accept_port(b) ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,1))
  331. # define BIO_get_peer_name(b) ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,2))
  332. # define BIO_get_peer_port(b) ((const char *)BIO_ptr_ctrl(b,BIO_C_GET_ACCEPT,3))
  333. /* #define BIO_set_nbio(b,n) BIO_ctrl(b,BIO_C_SET_NBIO,(n),NULL) */
  334. # define BIO_set_nbio_accept(b,n) BIO_ctrl(b,BIO_C_SET_ACCEPT,2,(n)?(void *)"a":NULL)
  335. # define BIO_set_accept_bios(b,bio) BIO_ctrl(b,BIO_C_SET_ACCEPT,3, \
  336. (char *)(bio))
  337. # define BIO_set_accept_ip_family(b,f) BIO_int_ctrl(b,BIO_C_SET_ACCEPT,4,f)
  338. # define BIO_get_accept_ip_family(b) BIO_ctrl(b,BIO_C_GET_ACCEPT,4,NULL)
  339. /* Aliases kept for backward compatibility */
  340. # define BIO_BIND_NORMAL 0
  341. # define BIO_BIND_REUSEADDR BIO_SOCK_REUSEADDR
  342. # define BIO_BIND_REUSEADDR_IF_UNUSED BIO_SOCK_REUSEADDR
  343. # define BIO_set_bind_mode(b,mode) BIO_ctrl(b,BIO_C_SET_BIND_MODE,mode,NULL)
  344. # define BIO_get_bind_mode(b) BIO_ctrl(b,BIO_C_GET_BIND_MODE,0,NULL)
  345. /* BIO_s_accept() and BIO_s_connect() */
  346. # define BIO_do_connect(b) BIO_do_handshake(b)
  347. # define BIO_do_accept(b) BIO_do_handshake(b)
  348. # endif /* OPENSSL_NO_SOCK */
  349. # define BIO_do_handshake(b) BIO_ctrl(b,BIO_C_DO_STATE_MACHINE,0,NULL)
  350. /* BIO_s_datagram(), BIO_s_fd(), BIO_s_socket(), BIO_s_accept() and BIO_s_connect() */
  351. # define BIO_set_fd(b,fd,c) BIO_int_ctrl(b,BIO_C_SET_FD,c,fd)
  352. # define BIO_get_fd(b,c) BIO_ctrl(b,BIO_C_GET_FD,0,(char *)(c))
  353. /* BIO_s_file() */
  354. # define BIO_set_fp(b,fp,c) BIO_ctrl(b,BIO_C_SET_FILE_PTR,c,(char *)(fp))
  355. # define BIO_get_fp(b,fpp) BIO_ctrl(b,BIO_C_GET_FILE_PTR,0,(char *)(fpp))
  356. /* BIO_s_fd() and BIO_s_file() */
  357. # define BIO_seek(b,ofs) (int)BIO_ctrl(b,BIO_C_FILE_SEEK,ofs,NULL)
  358. # define BIO_tell(b) (int)BIO_ctrl(b,BIO_C_FILE_TELL,0,NULL)
  359. /*
  360. * name is cast to lose const, but might be better to route through a
  361. * function so we can do it safely
  362. */
  363. # ifdef CONST_STRICT
  364. /*
  365. * If you are wondering why this isn't defined, its because CONST_STRICT is
  366. * purely a compile-time kludge to allow const to be checked.
  367. */
  368. int BIO_read_filename(BIO *b, const char *name);
  369. # else
  370. # define BIO_read_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
  371. BIO_CLOSE|BIO_FP_READ,(char *)(name))
  372. # endif
  373. # define BIO_write_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
  374. BIO_CLOSE|BIO_FP_WRITE,name)
  375. # define BIO_append_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
  376. BIO_CLOSE|BIO_FP_APPEND,name)
  377. # define BIO_rw_filename(b,name) (int)BIO_ctrl(b,BIO_C_SET_FILENAME, \
  378. BIO_CLOSE|BIO_FP_READ|BIO_FP_WRITE,name)
  379. /*
  380. * WARNING WARNING, this ups the reference count on the read bio of the SSL
  381. * structure. This is because the ssl read BIO is now pointed to by the
  382. * next_bio field in the bio. So when you free the BIO, make sure you are
  383. * doing a BIO_free_all() to catch the underlying BIO.
  384. */
  385. # define BIO_set_ssl(b,ssl,c) BIO_ctrl(b,BIO_C_SET_SSL,c,(char *)(ssl))
  386. # define BIO_get_ssl(b,sslp) BIO_ctrl(b,BIO_C_GET_SSL,0,(char *)(sslp))
  387. # define BIO_set_ssl_mode(b,client) BIO_ctrl(b,BIO_C_SSL_MODE,client,NULL)
  388. # define BIO_set_ssl_renegotiate_bytes(b,num) \
  389. BIO_ctrl(b,BIO_C_SET_SSL_RENEGOTIATE_BYTES,num,NULL)
  390. # define BIO_get_num_renegotiates(b) \
  391. BIO_ctrl(b,BIO_C_GET_SSL_NUM_RENEGOTIATES,0,NULL)
  392. # define BIO_set_ssl_renegotiate_timeout(b,seconds) \
  393. BIO_ctrl(b,BIO_C_SET_SSL_RENEGOTIATE_TIMEOUT,seconds,NULL)
  394. /* defined in evp.h */
  395. /* #define BIO_set_md(b,md) BIO_ctrl(b,BIO_C_SET_MD,1,(char *)(md)) */
  396. # define BIO_get_mem_data(b,pp) BIO_ctrl(b,BIO_CTRL_INFO,0,(char *)(pp))
  397. # define BIO_set_mem_buf(b,bm,c) BIO_ctrl(b,BIO_C_SET_BUF_MEM,c,(char *)(bm))
  398. # define BIO_get_mem_ptr(b,pp) BIO_ctrl(b,BIO_C_GET_BUF_MEM_PTR,0, \
  399. (char *)(pp))
  400. # define BIO_set_mem_eof_return(b,v) \
  401. BIO_ctrl(b,BIO_C_SET_BUF_MEM_EOF_RETURN,v,NULL)
  402. /* For the BIO_f_buffer() type */
  403. # define BIO_get_buffer_num_lines(b) BIO_ctrl(b,BIO_C_GET_BUFF_NUM_LINES,0,NULL)
  404. # define BIO_set_buffer_size(b,size) BIO_ctrl(b,BIO_C_SET_BUFF_SIZE,size,NULL)
  405. # define BIO_set_read_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,0)
  406. # define BIO_set_write_buffer_size(b,size) BIO_int_ctrl(b,BIO_C_SET_BUFF_SIZE,size,1)
  407. # define BIO_set_buffer_read_data(b,buf,num) BIO_ctrl(b,BIO_C_SET_BUFF_READ_DATA,num,buf)
  408. /* Don't use the next one unless you know what you are doing :-) */
  409. # define BIO_dup_state(b,ret) BIO_ctrl(b,BIO_CTRL_DUP,0,(char *)(ret))
  410. # define BIO_reset(b) (int)BIO_ctrl(b,BIO_CTRL_RESET,0,NULL)
  411. # define BIO_eof(b) (int)BIO_ctrl(b,BIO_CTRL_EOF,0,NULL)
  412. # define BIO_set_close(b,c) (int)BIO_ctrl(b,BIO_CTRL_SET_CLOSE,(c),NULL)
  413. # define BIO_get_close(b) (int)BIO_ctrl(b,BIO_CTRL_GET_CLOSE,0,NULL)
  414. # define BIO_pending(b) (int)BIO_ctrl(b,BIO_CTRL_PENDING,0,NULL)
  415. # define BIO_wpending(b) (int)BIO_ctrl(b,BIO_CTRL_WPENDING,0,NULL)
  416. /* ...pending macros have inappropriate return type */
  417. size_t BIO_ctrl_pending(BIO *b);
  418. size_t BIO_ctrl_wpending(BIO *b);
  419. # define BIO_flush(b) (int)BIO_ctrl(b,BIO_CTRL_FLUSH,0,NULL)
  420. # define BIO_get_info_callback(b,cbp) (int)BIO_ctrl(b,BIO_CTRL_GET_CALLBACK,0, \
  421. cbp)
  422. # define BIO_set_info_callback(b,cb) (int)BIO_callback_ctrl(b,BIO_CTRL_SET_CALLBACK,cb)
  423. /* For the BIO_f_buffer() type */
  424. # define BIO_buffer_get_num_lines(b) BIO_ctrl(b,BIO_CTRL_GET,0,NULL)
  425. # define BIO_buffer_peek(b,s,l) BIO_ctrl(b,BIO_CTRL_PEEK,(l),(s))
  426. /* For BIO_s_bio() */
  427. # define BIO_set_write_buf_size(b,size) (int)BIO_ctrl(b,BIO_C_SET_WRITE_BUF_SIZE,size,NULL)
  428. # define BIO_get_write_buf_size(b,size) (size_t)BIO_ctrl(b,BIO_C_GET_WRITE_BUF_SIZE,size,NULL)
  429. # define BIO_make_bio_pair(b1,b2) (int)BIO_ctrl(b1,BIO_C_MAKE_BIO_PAIR,0,b2)
  430. # define BIO_destroy_bio_pair(b) (int)BIO_ctrl(b,BIO_C_DESTROY_BIO_PAIR,0,NULL)
  431. # define BIO_shutdown_wr(b) (int)BIO_ctrl(b, BIO_C_SHUTDOWN_WR, 0, NULL)
  432. /* macros with inappropriate type -- but ...pending macros use int too: */
  433. # define BIO_get_write_guarantee(b) (int)BIO_ctrl(b,BIO_C_GET_WRITE_GUARANTEE,0,NULL)
  434. # define BIO_get_read_request(b) (int)BIO_ctrl(b,BIO_C_GET_READ_REQUEST,0,NULL)
  435. size_t BIO_ctrl_get_write_guarantee(BIO *b);
  436. size_t BIO_ctrl_get_read_request(BIO *b);
  437. int BIO_ctrl_reset_read_request(BIO *b);
  438. /* ctrl macros for dgram */
  439. # define BIO_ctrl_dgram_connect(b,peer) \
  440. (int)BIO_ctrl(b,BIO_CTRL_DGRAM_CONNECT,0, (char *)(peer))
  441. # define BIO_ctrl_set_connected(b,peer) \
  442. (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SET_CONNECTED, 0, (char *)(peer))
  443. # define BIO_dgram_recv_timedout(b) \
  444. (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_RECV_TIMER_EXP, 0, NULL)
  445. # define BIO_dgram_send_timedout(b) \
  446. (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_SEND_TIMER_EXP, 0, NULL)
  447. # define BIO_dgram_get_peer(b,peer) \
  448. (int)BIO_ctrl(b, BIO_CTRL_DGRAM_GET_PEER, 0, (char *)(peer))
  449. # define BIO_dgram_set_peer(b,peer) \
  450. (int)BIO_ctrl(b, BIO_CTRL_DGRAM_SET_PEER, 0, (char *)(peer))
  451. # define BIO_dgram_get_mtu_overhead(b) \
  452. (unsigned int)BIO_ctrl((b), BIO_CTRL_DGRAM_GET_MTU_OVERHEAD, 0, NULL)
  453. #define BIO_get_ex_new_index(l, p, newf, dupf, freef) \
  454. CRYPTO_get_ex_new_index(CRYPTO_EX_INDEX_BIO, l, p, newf, dupf, freef)
  455. int BIO_set_ex_data(BIO *bio, int idx, void *data);
  456. void *BIO_get_ex_data(BIO *bio, int idx);
  457. uint64_t BIO_number_read(BIO *bio);
  458. uint64_t BIO_number_written(BIO *bio);
  459. /* For BIO_f_asn1() */
  460. int BIO_asn1_set_prefix(BIO *b, asn1_ps_func *prefix,
  461. asn1_ps_func *prefix_free);
  462. int BIO_asn1_get_prefix(BIO *b, asn1_ps_func **pprefix,
  463. asn1_ps_func **pprefix_free);
  464. int BIO_asn1_set_suffix(BIO *b, asn1_ps_func *suffix,
  465. asn1_ps_func *suffix_free);
  466. int BIO_asn1_get_suffix(BIO *b, asn1_ps_func **psuffix,
  467. asn1_ps_func **psuffix_free);
  468. const BIO_METHOD *BIO_s_file(void);
  469. BIO *BIO_new_file(const char *filename, const char *mode);
  470. # ifndef OPENSSL_NO_STDIO
  471. BIO *BIO_new_fp(FILE *stream, int close_flag);
  472. # endif
  473. BIO *BIO_new(const BIO_METHOD *type);
  474. int BIO_free(BIO *a);
  475. void BIO_set_data(BIO *a, void *ptr);
  476. void *BIO_get_data(BIO *a);
  477. void BIO_set_init(BIO *a, int init);
  478. int BIO_get_init(BIO *a);
  479. void BIO_set_shutdown(BIO *a, int shut);
  480. int BIO_get_shutdown(BIO *a);
  481. void BIO_vfree(BIO *a);
  482. int BIO_up_ref(BIO *a);
  483. int BIO_read(BIO *b, void *data, int dlen);
  484. int BIO_read_ex(BIO *b, void *data, size_t dlen, size_t *readbytes);
  485. int BIO_gets(BIO *bp, char *buf, int size);
  486. int BIO_write(BIO *b, const void *data, int dlen);
  487. int BIO_write_ex(BIO *b, const void *data, size_t dlen, size_t *written);
  488. int BIO_puts(BIO *bp, const char *buf);
  489. int BIO_indent(BIO *b, int indent, int max);
  490. long BIO_ctrl(BIO *bp, int cmd, long larg, void *parg);
  491. long BIO_callback_ctrl(BIO *b, int cmd, BIO_info_cb *fp);
  492. void *BIO_ptr_ctrl(BIO *bp, int cmd, long larg);
  493. long BIO_int_ctrl(BIO *bp, int cmd, long larg, int iarg);
  494. BIO *BIO_push(BIO *b, BIO *append);
  495. BIO *BIO_pop(BIO *b);
  496. void BIO_free_all(BIO *a);
  497. BIO *BIO_find_type(BIO *b, int bio_type);
  498. BIO *BIO_next(BIO *b);
  499. void BIO_set_next(BIO *b, BIO *next);
  500. BIO *BIO_get_retry_BIO(BIO *bio, int *reason);
  501. int BIO_get_retry_reason(BIO *bio);
  502. void BIO_set_retry_reason(BIO *bio, int reason);
  503. BIO *BIO_dup_chain(BIO *in);
  504. int BIO_nread0(BIO *bio, char **buf);
  505. int BIO_nread(BIO *bio, char **buf, int num);
  506. int BIO_nwrite0(BIO *bio, char **buf);
  507. int BIO_nwrite(BIO *bio, char **buf, int num);
  508. long BIO_debug_callback(BIO *bio, int cmd, const char *argp, int argi,
  509. long argl, long ret);
  510. const BIO_METHOD *BIO_s_mem(void);
  511. const BIO_METHOD *BIO_s_secmem(void);
  512. BIO *BIO_new_mem_buf(const void *buf, int len);
  513. # ifndef OPENSSL_NO_SOCK
  514. const BIO_METHOD *BIO_s_socket(void);
  515. const BIO_METHOD *BIO_s_connect(void);
  516. const BIO_METHOD *BIO_s_accept(void);
  517. # endif
  518. const BIO_METHOD *BIO_s_fd(void);
  519. const BIO_METHOD *BIO_s_log(void);
  520. const BIO_METHOD *BIO_s_bio(void);
  521. const BIO_METHOD *BIO_s_null(void);
  522. const BIO_METHOD *BIO_f_null(void);
  523. const BIO_METHOD *BIO_f_buffer(void);
  524. const BIO_METHOD *BIO_f_linebuffer(void);
  525. const BIO_METHOD *BIO_f_nbio_test(void);
  526. # ifndef OPENSSL_NO_DGRAM
  527. const BIO_METHOD *BIO_s_datagram(void);
  528. int BIO_dgram_non_fatal_error(int error);
  529. BIO *BIO_new_dgram(int fd, int close_flag);
  530. # ifndef OPENSSL_NO_SCTP
  531. const BIO_METHOD *BIO_s_datagram_sctp(void);
  532. BIO *BIO_new_dgram_sctp(int fd, int close_flag);
  533. int BIO_dgram_is_sctp(BIO *bio);
  534. int BIO_dgram_sctp_notification_cb(BIO *b,
  535. void (*handle_notifications) (BIO *bio,
  536. void *context,
  537. void *buf),
  538. void *context);
  539. int BIO_dgram_sctp_wait_for_dry(BIO *b);
  540. int BIO_dgram_sctp_msg_waiting(BIO *b);
  541. # endif
  542. # endif
  543. # ifndef OPENSSL_NO_SOCK
  544. int BIO_sock_should_retry(int i);
  545. int BIO_sock_non_fatal_error(int error);
  546. # endif
  547. int BIO_fd_should_retry(int i);
  548. int BIO_fd_non_fatal_error(int error);
  549. int BIO_dump_cb(int (*cb) (const void *data, size_t len, void *u),
  550. void *u, const char *s, int len);
  551. int BIO_dump_indent_cb(int (*cb) (const void *data, size_t len, void *u),
  552. void *u, const char *s, int len, int indent);
  553. int BIO_dump(BIO *b, const char *bytes, int len);
  554. int BIO_dump_indent(BIO *b, const char *bytes, int len, int indent);
  555. # ifndef OPENSSL_NO_STDIO
  556. int BIO_dump_fp(FILE *fp, const char *s, int len);
  557. int BIO_dump_indent_fp(FILE *fp, const char *s, int len, int indent);
  558. # endif
  559. int BIO_hex_string(BIO *out, int indent, int width, unsigned char *data,
  560. int datalen);
  561. # ifndef OPENSSL_NO_SOCK
  562. BIO_ADDR *BIO_ADDR_new(void);
  563. int BIO_ADDR_rawmake(BIO_ADDR *ap, int family,
  564. const void *where, size_t wherelen, unsigned short port);
  565. void BIO_ADDR_free(BIO_ADDR *);
  566. void BIO_ADDR_clear(BIO_ADDR *ap);
  567. int BIO_ADDR_family(const BIO_ADDR *ap);
  568. int BIO_ADDR_rawaddress(const BIO_ADDR *ap, void *p, size_t *l);
  569. unsigned short BIO_ADDR_rawport(const BIO_ADDR *ap);
  570. char *BIO_ADDR_hostname_string(const BIO_ADDR *ap, int numeric);
  571. char *BIO_ADDR_service_string(const BIO_ADDR *ap, int numeric);
  572. char *BIO_ADDR_path_string(const BIO_ADDR *ap);
  573. const BIO_ADDRINFO *BIO_ADDRINFO_next(const BIO_ADDRINFO *bai);
  574. int BIO_ADDRINFO_family(const BIO_ADDRINFO *bai);
  575. int BIO_ADDRINFO_socktype(const BIO_ADDRINFO *bai);
  576. int BIO_ADDRINFO_protocol(const BIO_ADDRINFO *bai);
  577. const BIO_ADDR *BIO_ADDRINFO_address(const BIO_ADDRINFO *bai);
  578. void BIO_ADDRINFO_free(BIO_ADDRINFO *bai);
  579. enum BIO_hostserv_priorities {
  580. BIO_PARSE_PRIO_HOST, BIO_PARSE_PRIO_SERV
  581. };
  582. int BIO_parse_hostserv(const char *hostserv, char **host, char **service,
  583. enum BIO_hostserv_priorities hostserv_prio);
  584. enum BIO_lookup_type {
  585. BIO_LOOKUP_CLIENT, BIO_LOOKUP_SERVER
  586. };
  587. int BIO_lookup(const char *host, const char *service,
  588. enum BIO_lookup_type lookup_type,
  589. int family, int socktype, BIO_ADDRINFO **res);
  590. int BIO_lookup_ex(const char *host, const char *service,
  591. int lookup_type, int family, int socktype, int protocol,
  592. BIO_ADDRINFO **res);
  593. int BIO_sock_error(int sock);
  594. int BIO_socket_ioctl(int fd, long type, void *arg);
  595. int BIO_socket_nbio(int fd, int mode);
  596. int BIO_sock_init(void);
  597. # if OPENSSL_API_COMPAT < 0x10100000L
  598. # define BIO_sock_cleanup() while(0) continue
  599. # endif
  600. int BIO_set_tcp_ndelay(int sock, int turn_on);
  601. DEPRECATEDIN_1_1_0(struct hostent *BIO_gethostbyname(const char *name))
  602. DEPRECATEDIN_1_1_0(int BIO_get_port(const char *str, unsigned short *port_ptr))
  603. DEPRECATEDIN_1_1_0(int BIO_get_host_ip(const char *str, unsigned char *ip))
  604. DEPRECATEDIN_1_1_0(int BIO_get_accept_socket(char *host_port, int mode))
  605. DEPRECATEDIN_1_1_0(int BIO_accept(int sock, char **ip_port))
  606. union BIO_sock_info_u {
  607. BIO_ADDR *addr;
  608. };
  609. enum BIO_sock_info_type {
  610. BIO_SOCK_INFO_ADDRESS
  611. };
  612. int BIO_sock_info(int sock,
  613. enum BIO_sock_info_type type, union BIO_sock_info_u *info);
  614. # define BIO_SOCK_REUSEADDR 0x01
  615. # define BIO_SOCK_V6_ONLY 0x02
  616. # define BIO_SOCK_KEEPALIVE 0x04
  617. # define BIO_SOCK_NONBLOCK 0x08
  618. # define BIO_SOCK_NODELAY 0x10
  619. int BIO_socket(int domain, int socktype, int protocol, int options);
  620. int BIO_connect(int sock, const BIO_ADDR *addr, int options);
  621. int BIO_bind(int sock, const BIO_ADDR *addr, int options);
  622. int BIO_listen(int sock, const BIO_ADDR *addr, int options);
  623. int BIO_accept_ex(int accept_sock, BIO_ADDR *addr, int options);
  624. int BIO_closesocket(int sock);
  625. BIO *BIO_new_socket(int sock, int close_flag);
  626. BIO *BIO_new_connect(const char *host_port);
  627. BIO *BIO_new_accept(const char *host_port);
  628. # endif /* OPENSSL_NO_SOCK*/
  629. BIO *BIO_new_fd(int fd, int close_flag);
  630. int BIO_new_bio_pair(BIO **bio1, size_t writebuf1,
  631. BIO **bio2, size_t writebuf2);
  632. /*
  633. * If successful, returns 1 and in *bio1, *bio2 two BIO pair endpoints.
  634. * Otherwise returns 0 and sets *bio1 and *bio2 to NULL. Size 0 uses default
  635. * value.
  636. */
  637. void BIO_copy_next_retry(BIO *b);
  638. /*
  639. * long BIO_ghbn_ctrl(int cmd,int iarg,char *parg);
  640. */
  641. # define ossl_bio__attr__(x)
  642. # if defined(__GNUC__) && defined(__STDC_VERSION__) \
  643. && !defined(__APPLE__)
  644. /*
  645. * Because we support the 'z' modifier, which made its appearance in C99,
  646. * we can't use __attribute__ with pre C99 dialects.
  647. */
  648. # if __STDC_VERSION__ >= 199901L
  649. # undef ossl_bio__attr__
  650. # define ossl_bio__attr__ __attribute__
  651. # if __GNUC__*10 + __GNUC_MINOR__ >= 44
  652. # define ossl_bio__printf__ __gnu_printf__
  653. # else
  654. # define ossl_bio__printf__ __printf__
  655. # endif
  656. # endif
  657. # endif
  658. int BIO_printf(BIO *bio, const char *format, ...)
  659. ossl_bio__attr__((__format__(ossl_bio__printf__, 2, 3)));
  660. int BIO_vprintf(BIO *bio, const char *format, va_list args)
  661. ossl_bio__attr__((__format__(ossl_bio__printf__, 2, 0)));
  662. int BIO_snprintf(char *buf, size_t n, const char *format, ...)
  663. ossl_bio__attr__((__format__(ossl_bio__printf__, 3, 4)));
  664. int BIO_vsnprintf(char *buf, size_t n, const char *format, va_list args)
  665. ossl_bio__attr__((__format__(ossl_bio__printf__, 3, 0)));
  666. # undef ossl_bio__attr__
  667. # undef ossl_bio__printf__
  668. BIO_METHOD *BIO_meth_new(int type, const char *name);
  669. void BIO_meth_free(BIO_METHOD *biom);
  670. int (*BIO_meth_get_write(const BIO_METHOD *biom)) (BIO *, const char *, int);
  671. int (*BIO_meth_get_write_ex(const BIO_METHOD *biom)) (BIO *, const char *, size_t,
  672. size_t *);
  673. int BIO_meth_set_write(BIO_METHOD *biom,
  674. int (*write) (BIO *, const char *, int));
  675. int BIO_meth_set_write_ex(BIO_METHOD *biom,
  676. int (*bwrite) (BIO *, const char *, size_t, size_t *));
  677. int (*BIO_meth_get_read(const BIO_METHOD *biom)) (BIO *, char *, int);
  678. int (*BIO_meth_get_read_ex(const BIO_METHOD *biom)) (BIO *, char *, size_t, size_t *);
  679. int BIO_meth_set_read(BIO_METHOD *biom,
  680. int (*read) (BIO *, char *, int));
  681. int BIO_meth_set_read_ex(BIO_METHOD *biom,
  682. int (*bread) (BIO *, char *, size_t, size_t *));
  683. int (*BIO_meth_get_puts(const BIO_METHOD *biom)) (BIO *, const char *);
  684. int BIO_meth_set_puts(BIO_METHOD *biom,
  685. int (*puts) (BIO *, const char *));
  686. int (*BIO_meth_get_gets(const BIO_METHOD *biom)) (BIO *, char *, int);
  687. int BIO_meth_set_gets(BIO_METHOD *biom,
  688. int (*gets) (BIO *, char *, int));
  689. long (*BIO_meth_get_ctrl(const BIO_METHOD *biom)) (BIO *, int, long, void *);
  690. int BIO_meth_set_ctrl(BIO_METHOD *biom,
  691. long (*ctrl) (BIO *, int, long, void *));
  692. int (*BIO_meth_get_create(const BIO_METHOD *bion)) (BIO *);
  693. int BIO_meth_set_create(BIO_METHOD *biom, int (*create) (BIO *));
  694. int (*BIO_meth_get_destroy(const BIO_METHOD *biom)) (BIO *);
  695. int BIO_meth_set_destroy(BIO_METHOD *biom, int (*destroy) (BIO *));
  696. long (*BIO_meth_get_callback_ctrl(const BIO_METHOD *biom))
  697. (BIO *, int, BIO_info_cb *);
  698. int BIO_meth_set_callback_ctrl(BIO_METHOD *biom,
  699. long (*callback_ctrl) (BIO *, int,
  700. BIO_info_cb *));
  701. # ifdef __cplusplus
  702. }
  703. # endif
  704. #endif