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 # ifdef OPENSSL_SYS_WIN16
74 # define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
76 # define SOCKET_PROTOCOL IPPROTO_TCP
79 # define MAX_LISTEN SO_MAXCONN
80 # elif defined(SOMAXCONN)
81 # define MAX_LISTEN SOMAXCONN
83 # define MAX_LISTEN 32
85 # if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
86 static int wsa_init_done = 0;
90 static unsigned long BIO_ghbn_hits = 0L;
91 static unsigned long BIO_ghbn_miss = 0L;
94 static struct ghbn_cache_st {
98 } ghbn_cache[GHBN_NUM];
101 static int get_ip(const char *str, unsigned char *ip);
103 static void ghbn_free(struct hostent *a);
104 static struct hostent *ghbn_dup(struct hostent *a);
106 int BIO_get_host_ip(const char *str, unsigned char *ip)
115 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_INVALID_IP_ADDRESS);
120 * At this point, we have something that is most probably correct in some
121 * way, so let's init the socket.
123 if (BIO_sock_init() != 1)
124 return 0; /* don't generate another error code here */
127 * If the string actually contained an IP address, we need not do
133 /* do a gethostbyname */
134 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
136 he = BIO_gethostbyname(str);
138 BIOerr(BIO_F_BIO_GET_HOST_IP, BIO_R_BAD_HOSTNAME_LOOKUP);
142 /* cast to short because of win16 winsock definition */
143 if ((short)he->h_addrtype != AF_INET) {
144 BIOerr(BIO_F_BIO_GET_HOST_IP,
145 BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
148 for (i = 0; i < 4; i++)
149 ip[i] = he->h_addr_list[0][i];
154 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
156 ERR_add_error_data(2, "host=", str);
162 int BIO_get_port(const char *str, unsigned short *port_ptr)
168 BIOerr(BIO_F_BIO_GET_PORT, BIO_R_NO_PORT_DEFINED);
173 *port_ptr = (unsigned short)i;
175 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
177 * Note: under VMS with SOCKETSHR, it seems like the first parameter
178 * is 'char *', instead of 'const char *'
180 # ifndef CONST_STRICT
181 s = getservbyname((char *)str, "tcp");
183 s = getservbyname(str, "tcp");
186 *port_ptr = ntohs((unsigned short)s->s_port);
187 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
189 if (strcmp(str, "http") == 0)
191 else if (strcmp(str, "telnet") == 0)
193 else if (strcmp(str, "socks") == 0)
195 else if (strcmp(str, "https") == 0)
197 else if (strcmp(str, "ssl") == 0)
199 else if (strcmp(str, "ftp") == 0)
201 else if (strcmp(str, "gopher") == 0)
204 else if (strcmp(str, "wais") == 0)
208 SYSerr(SYS_F_GETSERVBYNAME, get_last_socket_error());
209 ERR_add_error_data(3, "service='", str, "'");
217 int BIO_sock_error(int sock)
224 * Note: under Windows the third parameter is of type (char *) whereas
225 * under other systems it is (void *) if you don't have a cast it will
226 * choke the compiler: if you do have a cast then you can either go for
227 * (char *) or (void *).
229 i = getsockopt(sock, SOL_SOCKET, SO_ERROR, (void *)&j, (void *)&size);
237 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
243 case BIO_GHBN_CTRL_HITS:
244 return (BIO_ghbn_hits);
246 case BIO_GHBN_CTRL_MISSES:
247 return (BIO_ghbn_miss);
249 case BIO_GHBN_CTRL_CACHE_SIZE:
252 case BIO_GHBN_CTRL_GET_ENTRY:
253 if ((iarg >= 0) && (iarg < GHBN_NUM) && (ghbn_cache[iarg].order > 0)) {
257 *p = ghbn_cache[iarg].name;
258 ghbn_cache[iarg].name[128] = '\0';
263 case BIO_GHBN_CTRL_FLUSH:
264 for (i = 0; i < GHBN_NUM; i++)
265 ghbn_cache[i].order = 0;
275 static struct hostent *ghbn_dup(struct hostent *a)
281 ret = (struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
284 memset(ret, 0, sizeof(struct hostent));
286 for (i = 0; a->h_aliases[i] != NULL; i++) ;
288 ret->h_aliases = (char **)OPENSSL_malloc(i * sizeof(char *));
289 if (ret->h_aliases == NULL)
291 memset(ret->h_aliases, 0, i * sizeof(char *));
293 for (i = 0; a->h_addr_list[i] != NULL; i++) ;
295 ret->h_addr_list = (char **)OPENSSL_malloc(i * sizeof(char *));
296 if (ret->h_addr_list == NULL)
298 memset(ret->h_addr_list, 0, i * sizeof(char *));
300 j = strlen(a->h_name) + 1;
301 if ((ret->h_name = OPENSSL_malloc(j)) == NULL)
303 memcpy((char *)ret->h_name, a->h_name, j);
304 for (i = 0; a->h_aliases[i] != NULL; i++) {
305 j = strlen(a->h_aliases[i]) + 1;
306 if ((ret->h_aliases[i] = OPENSSL_malloc(j)) == NULL)
308 memcpy(ret->h_aliases[i], a->h_aliases[i], j);
310 ret->h_length = a->h_length;
311 ret->h_addrtype = a->h_addrtype;
312 for (i = 0; a->h_addr_list[i] != NULL; i++) {
313 if ((ret->h_addr_list[i] = OPENSSL_malloc(a->h_length)) == NULL)
315 memcpy(ret->h_addr_list[i], a->h_addr_list[i], a->h_length);
327 static void ghbn_free(struct hostent *a)
334 if (a->h_aliases != NULL) {
335 for (i = 0; a->h_aliases[i] != NULL; i++)
336 OPENSSL_free(a->h_aliases[i]);
337 OPENSSL_free(a->h_aliases);
339 if (a->h_addr_list != NULL) {
340 for (i = 0; a->h_addr_list[i] != NULL; i++)
341 OPENSSL_free(a->h_addr_list[i]);
342 OPENSSL_free(a->h_addr_list);
344 if (a->h_name != NULL)
345 OPENSSL_free(a->h_name);
351 struct hostent *BIO_gethostbyname(const char *name)
355 * Caching gethostbyname() results forever is wrong, so we have to let
356 * the true gethostbyname() worry about this
358 # if (defined(NETWARE_BSDSOCK) && !defined(__NOVELL_LIBC__))
359 return gethostbyname((char *)name);
361 return gethostbyname(name);
366 unsigned long low = (unsigned long)-1;
370 * It doesn't make sense to use locking here: The function interface is
371 * not thread-safe, because threads can never be sure when some other
372 * thread destroys the data they were given a pointer to.
374 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
378 for (i = 0; i < GHBN_NUM; i++) {
379 if (low > ghbn_cache[i].order) {
380 low = ghbn_cache[i].order;
383 if (ghbn_cache[i].order > 0) {
384 if (strncmp(name, ghbn_cache[i].name, 128) == 0)
391 if (i == GHBN_NUM) { /* no hit */
394 * Note: under VMS with SOCKETSHR, it seems like the first parameter
395 * is 'char *', instead of 'const char *'
397 # ifndef CONST_STRICT
398 ret = gethostbyname((char *)name);
400 ret = gethostbyname(name);
405 if (j > 128) { /* too big to cache */
408 * If we were trying to make this function thread-safe (which is
409 * bound to fail), we'd have to give up in this case (or allocate
417 /* else add to cache */
418 if (ghbn_cache[lowi].ent != NULL)
419 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
420 ghbn_cache[lowi].name[0] = '\0';
422 if ((ret = ghbn_cache[lowi].ent = ghbn_dup(ret)) == NULL) {
423 BIOerr(BIO_F_BIO_GETHOSTBYNAME, ERR_R_MALLOC_FAILURE);
426 strncpy(ghbn_cache[lowi].name, name, 128);
427 ghbn_cache[lowi].order = BIO_ghbn_miss + BIO_ghbn_hits;
430 ret = ghbn_cache[i].ent;
431 ghbn_cache[i].order = BIO_ghbn_miss + BIO_ghbn_hits;
435 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
441 int BIO_sock_init(void)
443 # ifdef OPENSSL_SYS_WINDOWS
444 static struct WSAData wsa_state;
446 if (!wsa_init_done) {
450 memset(&wsa_state, 0, sizeof(wsa_state));
451 if (WSAStartup(0x0101, &wsa_state) != 0) {
452 err = WSAGetLastError();
453 SYSerr(SYS_F_WSASTARTUP, err);
454 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
458 # endif /* OPENSSL_SYS_WINDOWS */
460 extern int _watt_do_exit;
461 _watt_do_exit = 0; /* don't make sock_init() call exit() */
466 # if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
471 if (!wsa_init_done) {
473 wVerReq = MAKEWORD(2, 0);
474 err = WSAStartup(wVerReq, &wsaData);
476 SYSerr(SYS_F_WSASTARTUP, err);
477 BIOerr(BIO_F_BIO_SOCK_INIT, BIO_R_WSASTARTUP);
486 void BIO_sock_cleanup(void)
488 # ifdef OPENSSL_SYS_WINDOWS
491 # ifndef OPENSSL_SYS_WINCE
492 WSACancelBlockingCall(); /* Winsock 1.1 specific */
496 # elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
504 # if !defined(OPENSSL_SYS_VMS) || __VMS_VER >= 70000000
506 int BIO_socket_ioctl(int fd, long type, void *arg)
511 i = ioctlsocket(fd, type, (char *)arg);
513 i = ioctlsocket(fd, type, arg);
514 # endif /* __DJGPP__ */
516 SYSerr(SYS_F_IOCTLSOCKET, get_last_socket_error());
519 # endif /* __VMS_VER */
522 * The reason I have implemented this instead of using sscanf is because
523 * Visual C 1.52c gives an unresolved external when linking a DLL :-(
525 static int get_ip(const char *str, unsigned char ip[4])
528 int num = 0, c, ok = 0;
530 tmp[0] = tmp[1] = tmp[2] = tmp[3] = 0;
534 if ((c >= '0') && (c <= '9')) {
536 tmp[num] = tmp[num] * 10 + c - '0';
539 } else if (c == '.') {
546 } else if (c == '\0' && (num == 3) && ok)
558 int BIO_get_accept_socket(char *host, int bind_mode)
561 struct sockaddr_in server, client;
562 int s = INVALID_SOCKET, cs;
565 char *str = NULL, *e;
570 if (BIO_sock_init() != 1)
571 return (INVALID_SOCKET);
573 if ((str = BUF_strdup(host)) == NULL)
574 return (INVALID_SOCKET);
578 for (e = str; *e; e++) {
582 } else if (*e == '/') {
593 if (!BIO_get_port(p, &port))
596 memset((char *)&server, 0, sizeof(server));
597 server.sin_family = AF_INET;
598 server.sin_port = htons(port);
600 if (strcmp(h, "*") == 0)
601 server.sin_addr.s_addr = INADDR_ANY;
603 if (!BIO_get_host_ip(h, &(ip[0])))
606 ((unsigned long)ip[0] << 24L) |
607 ((unsigned long)ip[1] << 16L) |
608 ((unsigned long)ip[2] << 8L) | ((unsigned long)ip[3]);
609 server.sin_addr.s_addr = htonl(l);
613 s = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL);
614 if (s == INVALID_SOCKET) {
615 SYSerr(SYS_F_SOCKET, get_last_socket_error());
616 ERR_add_error_data(3, "port='", host, "'");
617 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_CREATE_SOCKET);
621 if (bind_mode == BIO_BIND_REUSEADDR) {
624 ret = setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (char *)&i, sizeof(i));
625 bind_mode = BIO_BIND_NORMAL;
628 if (bind(s, (struct sockaddr *)&server, sizeof(server)) == -1) {
630 err_num = get_last_socket_error();
631 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
632 # ifdef OPENSSL_SYS_WINDOWS
634 * Some versions of Windows define EADDRINUSE to a dummy value.
636 (err_num == WSAEADDRINUSE))
638 (err_num == EADDRINUSE))
641 memcpy((char *)&client, (char *)&server, sizeof(server));
642 if (strcmp(h, "*") == 0)
643 client.sin_addr.s_addr = htonl(0x7F000001);
644 cs = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL);
645 if (cs != INVALID_SOCKET) {
647 ii = connect(cs, (struct sockaddr *)&client, sizeof(client));
649 if (ii == INVALID_SOCKET) {
650 bind_mode = BIO_BIND_REUSEADDR;
659 SYSerr(SYS_F_BIND, err_num);
660 ERR_add_error_data(3, "port='", host, "'");
661 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_BIND_SOCKET);
664 if (listen(s, MAX_LISTEN) == -1) {
665 SYSerr(SYS_F_BIND, get_last_socket_error());
666 ERR_add_error_data(3, "port='", host, "'");
667 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET, BIO_R_UNABLE_TO_LISTEN_SOCKET);
674 if ((ret == 0) && (s != INVALID_SOCKET)) {
681 int BIO_accept(int sock, char **addr)
683 int ret = INVALID_SOCKET;
684 static struct sockaddr_in from;
690 memset((char *)&from, 0, sizeof(from));
693 * Note: under VMS with SOCKETSHR the fourth parameter is currently of
694 * type (int *) whereas under other systems it is (void *) if you don't
695 * have a cast it will choke the compiler: if you do have a cast then you
696 * can either go for (int *) or (void *).
698 ret = accept(sock, (struct sockaddr *)&from, (void *)&len);
699 if (ret == INVALID_SOCKET) {
700 if (BIO_sock_should_retry(ret))
702 SYSerr(SYS_F_ACCEPT, get_last_socket_error());
703 BIOerr(BIO_F_BIO_ACCEPT, BIO_R_ACCEPT_ERROR);
710 l = ntohl(from.sin_addr.s_addr);
711 port = ntohs(from.sin_port);
713 if ((p = OPENSSL_malloc(24)) == NULL) {
714 BIOerr(BIO_F_BIO_ACCEPT, ERR_R_MALLOC_FAILURE);
719 BIO_snprintf(*addr, 24, "%d.%d.%d.%d:%d",
720 (unsigned char)(l >> 24L) & 0xff,
721 (unsigned char)(l >> 16L) & 0xff,
722 (unsigned char)(l >> 8L) & 0xff,
723 (unsigned char)(l) & 0xff, port);
728 int BIO_set_tcp_ndelay(int s, int on)
731 # if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
742 ret = setsockopt(s, opt, TCP_NODELAY, (char *)&on, sizeof(on));
748 int BIO_socket_nbio(int s, int mode)
755 ret = BIO_socket_ioctl(s, FIONBIO, &l);