1 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
4 * This package is an SSL implementation written
5 * by Eric Young (eay@cryptsoft.com).
6 * The implementation was written so as to conform with Netscapes SSL.
8 * This library is free for commercial and non-commercial use as long as
9 * the following conditions are aheared to. The following conditions
10 * apply to all code found in this distribution, be it the RC4, RSA,
11 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
12 * included with this distribution is covered by the same copyright terms
13 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
15 * Copyright remains Eric Young's, and as such any Copyright notices in
16 * the code are not to be removed.
17 * If this package is used in a product, Eric Young should be given attribution
18 * as the author of the parts of the library used.
19 * This can be in the form of a textual message at program startup or
20 * in documentation (online or textual) provided with the package.
22 * Redistribution and use in source and binary forms, with or without
23 * modification, are permitted provided that the following conditions
25 * 1. Redistributions of source code must retain the copyright
26 * notice, this list of conditions and the following disclaimer.
27 * 2. Redistributions in binary form must reproduce the above copyright
28 * notice, this list of conditions and the following disclaimer in the
29 * documentation and/or other materials provided with the distribution.
30 * 3. All advertising materials mentioning features or use of this software
31 * must display the following acknowledgement:
32 * "This product includes cryptographic software written by
33 * Eric Young (eay@cryptsoft.com)"
34 * The word 'cryptographic' can be left out if the rouines from the library
35 * being used are not cryptographic related :-).
36 * 4. If you include any Windows specific code (or a derivative thereof) from
37 * the apps directory (application code) you must include an acknowledgement:
38 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
40 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
41 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
42 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
43 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
44 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
45 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
46 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
47 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
48 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
49 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
52 * The licence and distribution terms for any publically available version or
53 * derivative of this code cannot be changed. i.e. this code cannot simply be
54 * copied and put under another distribution licence
55 * [including the GNU Public Licence.]
62 #if defined(NETWARE_CLIB)
63 # include <sys/ioctl.h>
66 #ifndef OPENSSL_NO_SOCK
67 # include <openssl/dso.h>
68 # define SOCKET_PROTOCOL IPPROTO_TCP
70 # define MAX_LISTEN SO_MAXCONN
71 # elif defined(SOMAXCONN)
72 # define MAX_LISTEN SOMAXCONN
74 # define MAX_LISTEN 32
76 # if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
77 static int wsa_init_done = 0;
81 * WSAAPI specifier is required to make indirect calls to run-time
82 * linked WinSock 2 functions used in this module, to be specific
83 * [get|free]addrinfo and getnameinfo. This is because WinSock uses
84 * uses non-C calling convention, __stdcall vs. __cdecl, on x86
85 * Windows. On non-WinSock platforms WSAAPI needs to be void.
91 static int get_ip(const char *str, unsigned char *ip);
92 int BIO_get_host_ip(const char *str, unsigned char *ip)
101 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_INVALID_IP_ADDRESS);
106 * At this point, we have something that is most probably correct in some
107 * way, so let's init the socket.
109 if (BIO_sock_init() != 1)
110 return 0; /* don't generate another error code here */
113 * If the string actually contained an IP address, we need not do
119 /* do a gethostbyname */
120 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
122 he = BIO_gethostbyname(str);
124 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_BAD_HOSTNAME_LOOKUP);
128 if (he->h_addrtype != AF_INET) {
129 BIOerr(BIO_F_BIO_GET_HOST_IP,
130 BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
133 for (i = 0; i < 4; i++)
134 ip[i] = he->h_addr_list[0][i];
139 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
141 ERR_add_error_data(2, "host=", str);
147 int BIO_get_port(const char *str, unsigned short *port_ptr)
153 BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
158 *port_ptr = (unsigned short)i;
160 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
162 * Note: under VMS with SOCKETSHR, it seems like the first parameter
163 * is 'char *', instead of 'const char *'
165 # ifndef CONST_STRICT
166 s = getservbyname((char *)str, "tcp");
168 s = getservbyname(str, "tcp");
171 *port_ptr = ntohs((unsigned short)s->s_port);
172 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
174 if (strcmp(str, "http") == 0)
176 else if (strcmp(str, "telnet") == 0)
178 else if (strcmp(str, "socks") == 0)
180 else if (strcmp(str, "https") == 0)
182 else if (strcmp(str, "ssl") == 0)
184 else if (strcmp(str, "ftp") == 0)
186 else if (strcmp(str, "gopher") == 0)
189 SYSerr(SYS_F_GETSERVBYNAME, get_last_socket_error());
190 ERR_add_error_data(3, "service='", str, "'");
198 int BIO_sock_error(int sock)
206 /* heuristic way to adapt for platforms that expect 64-bit optlen */
207 size.s = 0, size.i = sizeof(j);
209 * Note: under Windows the third parameter is of type (char *) whereas
210 * under other systems it is (void *) if you don't have a cast it will
211 * choke the compiler: if you do have a cast then you can either go for
212 * (char *) or (void *).
214 i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, (void *)&size);
221 struct hostent *BIO_gethostbyname(const char *name)
224 * Caching gethostbyname() results forever is wrong, so we have to let
225 * the true gethostbyname() worry about this
227 # if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
228 return gethostbyname((char *)name);
230 return gethostbyname(name);
234 int BIO_sock_init(void)
236 # ifdef OPENSSL_SYS_WINDOWS
237 static struct WSAData wsa_state;
239 if (!wsa_init_done) {
243 memset(&wsa_state, 0, sizeof(wsa_state));
245 * Not making wsa_state available to the rest of the code is formally
246 * wrong. But the structures we use are [beleived to be] invariable
247 * among Winsock DLLs, while API availability is [expected to be]
248 * probed at run-time with DSO_global_lookup.
250 if (WSAStartup(0x0202, &wsa_state) != 0) {
251 err = WSAGetLastError();
252 SYSerr(SYS_F_WSASTARTUP, err);
253 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
257 # endif /* OPENSSL_SYS_WINDOWS */
259 extern int _watt_do_exit;
260 _watt_do_exit = 0; /* don't make sock_init() call exit() */
265 # if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
270 if (!wsa_init_done) {
272 wVerReq = MAKEWORD(2, 0);
273 err = WSAStartup(wVerReq, &wsaData);
275 SYSerr(SYS_F_WSASTARTUP, err);
276 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
285 void BIO_sock_cleanup(void)
287 # ifdef OPENSSL_SYS_WINDOWS
292 # elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
300 # if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
302 int BIO_socket_ioctl(int fd, long type, void *arg)
307 i = ioctlsocket(fd, type, (char *)arg);
309 # if defined(OPENSSL_SYS_VMS)
312 * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
313 * observe that all the consumers pass in an "unsigned long *",
314 * so we arrange a local copy with a short pointer, and use
317 # if __INITIAL_POINTER_SIZE == 64
319 # pragma pointer_size save
320 # pragma pointer_size 32
321 unsigned long arg_32;
322 unsigned long *arg_32p;
323 # pragma pointer_size restore
325 arg_32 = *((unsigned long *)arg);
326 # else /* __INITIAL_POINTER_SIZE == 64 */
328 # endif /* __INITIAL_POINTER_SIZE == 64 [else] */
329 # else /* defined(OPENSSL_SYS_VMS) */
331 # endif /* defined(OPENSSL_SYS_VMS) [else] */
333 i = ioctlsocket(fd, type, ARG);
334 # endif /* __DJGPP__ */
336 SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
339 # endif /* __VMS_VER */
342 * The reason I have implemented this instead of using sscanf is because
343 * Visual C 1.52c gives an unresolved external when linking a DLL :-(
345 static int get_ip(const char *str, unsigned char ip[4])
348 int num = 0, c, ok = 0;
350 tmp[0] = tmp[1] = tmp[2] = tmp[3] = 0;
354 if ((c >= '0') && (c <= '9')) {
356 tmp[num] = tmp[num] * 10 + c - '0';
359 } else if (c == '.') {
366 } else if (c == '\0' && (num == 3) && ok)
378 int BIO_get_accept_socket(char *host, int bind_mode)
383 struct sockaddr_in sa_in;
384 # if OPENSSL_USE_IPV6
385 struct sockaddr_in6 sa_in6;
388 int s = (int)INVALID_SOCKET, cs, addrlen;
391 char *str = NULL, *e;
396 if (BIO_sock_init() != 1)
397 return ((int)INVALID_SOCKET);
399 if ((str = OPENSSL_strdup(host)) == NULL)
400 return ((int)INVALID_SOCKET);
404 for (e = str; *e; e++) {
407 } else if (*e == '/') {
413 *p++ = '\0'; /* points at last ':', '::port' is special
422 int (WSAAPI *f) (const char *, const char *,
423 const struct addrinfo *, struct addrinfo **);
429 void (WSAAPI *f) (struct addrinfo *);
433 struct addrinfo *res, hint;
435 if (p_getaddrinfo.p == NULL) {
436 if ((p_getaddrinfo.p = DSO_global_lookup("getaddrinfo")) == NULL
437 || (p_freeaddrinfo.p =
438 DSO_global_lookup("freeaddrinfo")) == NULL)
439 p_getaddrinfo.p = (void *)-1;
441 if (p_getaddrinfo.p == (void *)-1)
445 * '::port' enforces IPv6 wildcard listener. Some OSes, e.g. Solaris,
446 * default to IPv6 without any hint. Also note that commonly IPv6
447 * wildchard socket can service IPv4 connections just as well...
449 memset(&hint, 0, sizeof(hint));
450 hint.ai_flags = AI_PASSIVE;
452 if (strchr(h, ':')) {
455 # if OPENSSL_USE_IPV6
456 hint.ai_family = AF_INET6;
460 } else if (h[0] == '*' && h[1] == '\0') {
461 hint.ai_family = AF_INET;
466 if ((*p_getaddrinfo.f) (h, p, &hint, &res))
469 addrlen = res->ai_addrlen <= sizeof(server) ?
470 res->ai_addrlen : sizeof(server);
471 memcpy(&server, res->ai_addr, addrlen);
473 (*p_freeaddrinfo.f) (res);
478 if (!BIO_get_port(p, &port))
481 memset(&server, 0, sizeof(server));
482 server.sa_in.sin_family = AF_INET;
483 server.sa_in.sin_port = htons(port);
484 addrlen = sizeof(server.sa_in);
486 if (h == NULL || strcmp(h, "*") == 0)
487 server.sa_in.sin_addr.s_addr = INADDR_ANY;
489 if (!BIO_get_host_ip(h, &(ip[0])))
492 ((unsigned long)ip[0] << 24L) |
493 ((unsigned long)ip[1] << 16L) |
494 ((unsigned long)ip[2] << 8L) | ((unsigned long)ip[3]);
495 server.sa_in.sin_addr.s_addr = htonl(l);
499 s = socket(server.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL);
500 if (s == (int)INVALID_SOCKET) {
501 SYSerr(SYS_F_SOCKET, get_last_socket_error());
502 ERR_add_error_data(3, "port='", host, "'");
503 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_CREATE_SOCKET);
507 if (bind_mode == BIO_BIND_REUSEADDR) {
510 ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&i, sizeof(i));
511 bind_mode = BIO_BIND_NORMAL;
514 if (bind(s, &server.sa, addrlen) == -1) {
516 err_num = get_last_socket_error();
517 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
518 # ifdef OPENSSL_SYS_WINDOWS
520 * Some versions of Windows define EADDRINUSE to a dummy value.
522 (err_num == WSAEADDRINUSE))
524 (err_num == EADDRINUSE))
528 if (h == NULL || strcmp(h, "*") == 0) {
529 # if OPENSSL_USE_IPV6
530 if (client.sa.sa_family == AF_INET6) {
531 memset(&client.sa_in6.sin6_addr, 0,
532 sizeof(client.sa_in6.sin6_addr));
533 client.sa_in6.sin6_addr.s6_addr[15] = 1;
536 if (client.sa.sa_family == AF_INET) {
537 client.sa_in.sin_addr.s_addr = htonl(0x7F000001);
541 cs = socket(client.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL);
542 if (cs != (int)INVALID_SOCKET) {
544 ii = connect(cs, &client.sa, addrlen);
546 if (ii == (int)INVALID_SOCKET) {
547 bind_mode = BIO_BIND_REUSEADDR;
556 SYSerr(SYS_F_BIND, err_num);
557 ERR_add_error_data(3, "port='", host, "'");
558 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_BIND_SOCKET);
561 if (listen(s, MAX_LISTEN) == -1) {
562 SYSerr(SYS_F_BIND, get_last_socket_error());
563 ERR_add_error_data(3, "port='", host, "'");
564 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_LISTEN_SOCKET);
570 if ((ret == 0) && (s != (int)INVALID_SOCKET)) {
572 s = (int)INVALID_SOCKET;
577 int BIO_accept(int sock, char **addr)
579 int ret = (int)INVALID_SOCKET;
586 * As for following union. Trouble is that there are platforms
587 * that have socklen_t and there are platforms that don't, on
588 * some platforms socklen_t is int and on some size_t. So what
589 * one can do? One can cook #ifdef spaghetti, which is nothing
590 * but masochistic. Or one can do union between int and size_t.
591 * One naturally does it primarily for 64-bit platforms where
592 * sizeof(int) != sizeof(size_t). But would it work? Note that
593 * if size_t member is initialized to 0, then later int member
594 * assignment naturally does the job on little-endian platforms
595 * regardless accept's expectations! What about big-endians?
596 * If accept expects int*, then it works, and if size_t*, then
597 * length value would appear as unreasonably large. But this
598 * won't prevent it from filling in the address structure. The
599 * trouble of course would be if accept returns more data than
600 * actual buffer can accomodate and overwrite stack... That's
601 * where early OPENSSL_assert comes into picture. Besides, the
602 * only 64-bit big-endian platform found so far that expects
603 * size_t* is HP-UX, where stack grows towards higher address.
612 struct sockaddr_in sa_in;
613 # if OPENSSL_USE_IPV6
614 struct sockaddr_in6 sa_in6;
620 sa.len.i = sizeof(sa.from);
621 memset(&sa.from, 0, sizeof(sa.from));
622 ret = accept(sock, &sa.from.sa, (void *)&sa.len);
623 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
624 OPENSSL_assert(sa.len.s <= sizeof(sa.from));
625 sa.len.i = (int)sa.len.s;
626 /* use sa.len.i from this point */
628 if (ret == (int)INVALID_SOCKET) {
629 if (BIO_sock_should_retry(ret))
631 SYSerr(SYS_F_ACCEPT, get_last_socket_error());
632 BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
641 char h[NI_MAXHOST], s[NI_MAXSERV];
645 int (WSAAPI *f) (const struct sockaddr *, size_t /* socklen_t */ ,
646 char *, size_t, char *, size_t, int);
651 * 2nd argument to getnameinfo is specified to be socklen_t.
652 * Unfortunately there is a number of environments where socklen_t is
653 * not defined. As it's passed by value, it's safe to pass it as
657 if (p_getnameinfo.p == NULL) {
658 if ((p_getnameinfo.p = DSO_global_lookup("getnameinfo")) == NULL)
659 p_getnameinfo.p = (void *)-1;
661 if (p_getnameinfo.p == (void *)-1)
664 if ((*p_getnameinfo.f) (&sa.from.sa, sa.len.i, h, sizeof(h), s,
665 sizeof(s), NI_NUMERICHOST | NI_NUMERICSERV))
667 nl = strlen(h) + strlen(s) + 2;
671 p = OPENSSL_realloc(p, nl);
673 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
677 BIO_snprintf(*addr, nl, "%s:%s", h, s);
681 if (sa.from.sa.sa_family != AF_INET)
683 l = ntohl(sa.from.sa_in.sin_addr.s_addr);
684 port = ntohs(sa.from.sa_in.sin_port);
686 if ((p = OPENSSL_malloc(24)) == NULL) {
687 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
692 BIO_snprintf(*addr, 24, "%d.%d.%d.%d:%d",
693 (unsigned char)(l >> 24L) & 0xff,
694 (unsigned char)(l >> 16L) & 0xff,
695 (unsigned char)(l >> 8L) & 0xff,
696 (unsigned char)(l) & 0xff, port);
701 int BIO_set_tcp_ndelay(int s, int on)
704 # if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
715 ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
720 int BIO_socket_nbio(int s, int mode)
727 ret = BIO_socket_ioctl(s, FIONBIO, &l);