1 /* crypto/bio/b_sock.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
64 #include <openssl/bio.h>
65 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
67 # if defined(NETWARE_CLIB)
68 # include <sys/ioctl.h>
72 #ifndef OPENSSL_NO_SOCK
73 # include <openssl/dso.h>
74 # define SOCKET_PROTOCOL IPPROTO_TCP
76 # define MAX_LISTEN SO_MAXCONN
77 # elif defined(SOMAXCONN)
78 # define MAX_LISTEN SOMAXCONN
80 # define MAX_LISTEN 32
82 # if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
83 static int wsa_init_done = 0;
87 * WSAAPI specifier is required to make indirect calls to run-time
88 * linked WinSock 2 functions used in this module, to be specific
89 * [get|free]addrinfo and getnameinfo. This is because WinSock uses
90 * uses non-C calling convention, __stdcall vs. __cdecl, on x86
91 * Windows. On non-WinSock platforms WSAAPI needs to be void.
97 static int get_ip(const char *str, unsigned char *ip);
98 int BIO_get_host_ip(const char *str, unsigned char *ip)
107 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_INVALID_IP_ADDRESS);
112 * At this point, we have something that is most probably correct in some
113 * way, so let's init the socket.
115 if (BIO_sock_init() != 1)
116 return 0; /* don't generate another error code here */
119 * If the string actually contained an IP address, we need not do
125 /* do a gethostbyname */
126 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
128 he = BIO_gethostbyname(str);
130 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_BAD_HOSTNAME_LOOKUP);
134 if (he->h_addrtype != AF_INET) {
135 BIOerr(BIO_F_BIO_GET_HOST_IP,
136 BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
139 for (i = 0; i < 4; i++)
140 ip[i] = he->h_addr_list[0][i];
145 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
147 ERR_add_error_data(2, "host=", str);
153 int BIO_get_port(const char *str, unsigned short *port_ptr)
159 BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
164 *port_ptr = (unsigned short)i;
166 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
168 * Note: under VMS with SOCKETSHR, it seems like the first parameter
169 * is 'char *', instead of 'const char *'
171 # ifndef CONST_STRICT
172 s = getservbyname((char *)str, "tcp");
174 s = getservbyname(str, "tcp");
177 *port_ptr = ntohs((unsigned short)s->s_port);
178 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
180 if (strcmp(str, "http") == 0)
182 else if (strcmp(str, "telnet") == 0)
184 else if (strcmp(str, "socks") == 0)
186 else if (strcmp(str, "https") == 0)
188 else if (strcmp(str, "ssl") == 0)
190 else if (strcmp(str, "ftp") == 0)
192 else if (strcmp(str, "gopher") == 0)
195 SYSerr(SYS_F_GETSERVBYNAME, get_last_socket_error());
196 ERR_add_error_data(3, "service='", str, "'");
204 int BIO_sock_error(int sock)
212 /* heuristic way to adapt for platforms that expect 64-bit optlen */
213 size.s = 0, size.i = sizeof(j);
215 * Note: under Windows the third parameter is of type (char *) whereas
216 * under other systems it is (void *) if you don't have a cast it will
217 * choke the compiler: if you do have a cast then you can either go for
218 * (char *) or (void *).
220 i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, (void *)&size);
227 struct hostent *BIO_gethostbyname(const char *name)
230 * Caching gethostbyname() results forever is wrong, so we have to let
231 * the true gethostbyname() worry about this
233 # if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
234 return gethostbyname((char *)name);
236 return gethostbyname(name);
240 int BIO_sock_init(void)
242 # ifdef OPENSSL_SYS_WINDOWS
243 static struct WSAData wsa_state;
245 if (!wsa_init_done) {
249 memset(&wsa_state, 0, sizeof(wsa_state));
251 * Not making wsa_state available to the rest of the code is formally
252 * wrong. But the structures we use are [beleived to be] invariable
253 * among Winsock DLLs, while API availability is [expected to be]
254 * probed at run-time with DSO_global_lookup.
256 if (WSAStartup(0x0202, &wsa_state) != 0) {
257 err = WSAGetLastError();
258 SYSerr(SYS_F_WSASTARTUP, err);
259 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
263 # endif /* OPENSSL_SYS_WINDOWS */
265 extern int _watt_do_exit;
266 _watt_do_exit = 0; /* don't make sock_init() call exit() */
271 # if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
276 if (!wsa_init_done) {
278 wVerReq = MAKEWORD(2, 0);
279 err = WSAStartup(wVerReq, &wsaData);
281 SYSerr(SYS_F_WSASTARTUP, err);
282 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
291 void BIO_sock_cleanup(void)
293 # ifdef OPENSSL_SYS_WINDOWS
298 # elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
306 # if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
308 int BIO_socket_ioctl(int fd, long type, void *arg)
313 i = ioctlsocket(fd, type, (char *)arg);
315 # if defined(OPENSSL_SYS_VMS)
318 * VMS ioctl() can't tolerate a 64-bit "void *arg", but we
319 * observe that all the consumers pass in an "unsigned long *",
320 * so we arrange a local copy with a short pointer, and use
323 # if __INITIAL_POINTER_SIZE == 64
325 # pragma pointer_size save
326 # pragma pointer_size 32
327 unsigned long arg_32;
328 unsigned long *arg_32p;
329 # pragma pointer_size restore
331 arg_32 = *((unsigned long *)arg);
332 # else /* __INITIAL_POINTER_SIZE == 64 */
334 # endif /* __INITIAL_POINTER_SIZE == 64 [else] */
335 # else /* defined(OPENSSL_SYS_VMS) */
337 # endif /* defined(OPENSSL_SYS_VMS) [else] */
339 i = ioctlsocket(fd, type, ARG);
340 # endif /* __DJGPP__ */
342 SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
345 # endif /* __VMS_VER */
348 * The reason I have implemented this instead of using sscanf is because
349 * Visual C 1.52c gives an unresolved external when linking a DLL :-(
351 static int get_ip(const char *str, unsigned char ip[4])
354 int num = 0, c, ok = 0;
356 tmp[0] = tmp[1] = tmp[2] = tmp[3] = 0;
360 if ((c >= '0') && (c <= '9')) {
362 tmp[num] = tmp[num] * 10 + c - '0';
365 } else if (c == '.') {
372 } else if (c == '\0' && (num == 3) && ok)
384 int BIO_get_accept_socket(char *host, int bind_mode)
389 struct sockaddr_in sa_in;
390 # if OPENSSL_USE_IPV6
391 struct sockaddr_in6 sa_in6;
394 int s = INVALID_SOCKET, cs, addrlen;
397 char *str = NULL, *e;
402 if (BIO_sock_init() != 1)
403 return (INVALID_SOCKET);
405 if ((str = BUF_strdup(host)) == NULL)
406 return (INVALID_SOCKET);
410 for (e = str; *e; e++) {
413 } else if (*e == '/') {
419 *p++ = '\0'; /* points at last ':', '::port' is special
428 int (WSAAPI *f) (const char *, const char *,
429 const struct addrinfo *, struct addrinfo **);
435 void (WSAAPI *f) (struct addrinfo *);
439 struct addrinfo *res, hint;
441 if (p_getaddrinfo.p == NULL) {
442 if ((p_getaddrinfo.p = DSO_global_lookup("getaddrinfo")) == NULL
443 || (p_freeaddrinfo.p =
444 DSO_global_lookup("freeaddrinfo")) == NULL)
445 p_getaddrinfo.p = (void *)-1;
447 if (p_getaddrinfo.p == (void *)-1)
451 * '::port' enforces IPv6 wildcard listener. Some OSes, e.g. Solaris,
452 * default to IPv6 without any hint. Also note that commonly IPv6
453 * wildchard socket can service IPv4 connections just as well...
455 memset(&hint, 0, sizeof(hint));
456 hint.ai_flags = AI_PASSIVE;
458 if (strchr(h, ':')) {
461 # if OPENSSL_USE_IPV6
462 hint.ai_family = AF_INET6;
466 } else if (h[0] == '*' && h[1] == '\0') {
467 hint.ai_family = AF_INET;
472 if ((*p_getaddrinfo.f) (h, p, &hint, &res))
475 addrlen = res->ai_addrlen <= sizeof(server) ?
476 res->ai_addrlen : sizeof(server);
477 memcpy(&server, res->ai_addr, addrlen);
479 (*p_freeaddrinfo.f) (res);
484 if (!BIO_get_port(p, &port))
487 memset((char *)&server, 0, sizeof(server));
488 server.sa_in.sin_family = AF_INET;
489 server.sa_in.sin_port = htons(port);
490 addrlen = sizeof(server.sa_in);
492 if (h == NULL || strcmp(h, "*") == 0)
493 server.sa_in.sin_addr.s_addr = INADDR_ANY;
495 if (!BIO_get_host_ip(h, &(ip[0])))
498 ((unsigned long)ip[0] << 24L) |
499 ((unsigned long)ip[1] << 16L) |
500 ((unsigned long)ip[2] << 8L) | ((unsigned long)ip[3]);
501 server.sa_in.sin_addr.s_addr = htonl(l);
505 s = socket(server.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL);
506 if (s == INVALID_SOCKET) {
507 SYSerr(SYS_F_SOCKET, get_last_socket_error());
508 ERR_add_error_data(3, "port='", host, "'");
509 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_CREATE_SOCKET);
513 if (bind_mode == BIO_BIND_REUSEADDR) {
516 ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&i, sizeof(i));
517 bind_mode = BIO_BIND_NORMAL;
520 if (bind(s, &server.sa, addrlen) == -1) {
522 err_num = get_last_socket_error();
523 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
524 # ifdef OPENSSL_SYS_WINDOWS
526 * Some versions of Windows define EADDRINUSE to a dummy value.
528 (err_num == WSAEADDRINUSE))
530 (err_num == EADDRINUSE))
534 if (h == NULL || strcmp(h, "*") == 0) {
535 # if OPENSSL_USE_IPV6
536 if (client.sa.sa_family == AF_INET6) {
537 memset(&client.sa_in6.sin6_addr, 0,
538 sizeof(client.sa_in6.sin6_addr));
539 client.sa_in6.sin6_addr.s6_addr[15] = 1;
542 if (client.sa.sa_family == AF_INET) {
543 client.sa_in.sin_addr.s_addr = htonl(0x7F000001);
547 cs = socket(client.sa.sa_family, SOCK_STREAM, SOCKET_PROTOCOL);
548 if (cs != INVALID_SOCKET) {
550 ii = connect(cs, &client.sa, addrlen);
552 if (ii == INVALID_SOCKET) {
553 bind_mode = BIO_BIND_REUSEADDR;
562 SYSerr(SYS_F_BIND, err_num);
563 ERR_add_error_data(3, "port='", host, "'");
564 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_BIND_SOCKET);
567 if (listen(s, MAX_LISTEN) == -1) {
568 SYSerr(SYS_F_BIND, get_last_socket_error());
569 ERR_add_error_data(3, "port='", host, "'");
570 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_LISTEN_SOCKET);
577 if ((ret == 0) && (s != INVALID_SOCKET)) {
584 int BIO_accept(int sock, char **addr)
586 int ret = INVALID_SOCKET;
593 * As for following union. Trouble is that there are platforms
594 * that have socklen_t and there are platforms that don't, on
595 * some platforms socklen_t is int and on some size_t. So what
596 * one can do? One can cook #ifdef spaghetti, which is nothing
597 * but masochistic. Or one can do union between int and size_t.
598 * One naturally does it primarily for 64-bit platforms where
599 * sizeof(int) != sizeof(size_t). But would it work? Note that
600 * if size_t member is initialized to 0, then later int member
601 * assignment naturally does the job on little-endian platforms
602 * regardless accept's expectations! What about big-endians?
603 * If accept expects int*, then it works, and if size_t*, then
604 * length value would appear as unreasonably large. But this
605 * won't prevent it from filling in the address structure. The
606 * trouble of course would be if accept returns more data than
607 * actual buffer can accomodate and overwrite stack... That's
608 * where early OPENSSL_assert comes into picture. Besides, the
609 * only 64-bit big-endian platform found so far that expects
610 * size_t* is HP-UX, where stack grows towards higher address.
619 struct sockaddr_in sa_in;
620 # if OPENSSL_USE_IPV6
621 struct sockaddr_in6 sa_in6;
627 sa.len.i = sizeof(sa.from);
628 memset(&sa.from, 0, sizeof(sa.from));
629 ret = accept(sock, &sa.from.sa, (void *)&sa.len);
630 if (sizeof(sa.len.i) != sizeof(sa.len.s) && sa.len.i == 0) {
631 OPENSSL_assert(sa.len.s <= sizeof(sa.from));
632 sa.len.i = (int)sa.len.s;
633 /* use sa.len.i from this point */
635 if (ret == INVALID_SOCKET) {
636 if (BIO_sock_should_retry(ret))
638 SYSerr(SYS_F_ACCEPT, get_last_socket_error());
639 BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
648 char h[NI_MAXHOST], s[NI_MAXSERV];
652 int (WSAAPI *f) (const struct sockaddr *, size_t /* socklen_t */ ,
653 char *, size_t, char *, size_t, int);
658 * 2nd argument to getnameinfo is specified to be socklen_t.
659 * Unfortunately there is a number of environments where socklen_t is
660 * not defined. As it's passed by value, it's safe to pass it as
664 if (p_getnameinfo.p == NULL) {
665 if ((p_getnameinfo.p = DSO_global_lookup("getnameinfo")) == NULL)
666 p_getnameinfo.p = (void *)-1;
668 if (p_getnameinfo.p == (void *)-1)
671 if ((*p_getnameinfo.f) (&sa.from.sa, sa.len.i, h, sizeof(h), s,
672 sizeof(s), NI_NUMERICHOST | NI_NUMERICSERV))
674 nl = strlen(h) + strlen(s) + 2;
678 p = OPENSSL_realloc(p, nl);
680 p = OPENSSL_malloc(nl);
683 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
687 BIO_snprintf(*addr, nl, "%s:%s", h, s);
691 if (sa.from.sa.sa_family != AF_INET)
693 l = ntohl(sa.from.sa_in.sin_addr.s_addr);
694 port = ntohs(sa.from.sa_in.sin_port);
696 if ((p = OPENSSL_malloc(24)) == NULL) {
697 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
702 BIO_snprintf(*addr, 24, "%d.%d.%d.%d:%d",
703 (unsigned char)(l >> 24L) & 0xff,
704 (unsigned char)(l >> 16L) & 0xff,
705 (unsigned char)(l >> 8L) & 0xff,
706 (unsigned char)(l) & 0xff, port);
711 int BIO_set_tcp_ndelay(int s, int on)
714 # if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
725 ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
730 int BIO_socket_nbio(int s, int mode)
737 ret = BIO_socket_ioctl(s, FIONBIO, &l);