2 * apps/s_socket.c - socket-related functions used by s_client and s_server
4 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
7 * This package is an SSL implementation written
8 * by Eric Young (eay@cryptsoft.com).
9 * The implementation was written so as to conform with Netscapes SSL.
11 * This library is free for commercial and non-commercial use as long as
12 * the following conditions are aheared to. The following conditions
13 * apply to all code found in this distribution, be it the RC4, RSA,
14 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
15 * included with this distribution is covered by the same copyright terms
16 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
18 * Copyright remains Eric Young's, and as such any Copyright notices in
19 * the code are not to be removed.
20 * If this package is used in a product, Eric Young should be given attribution
21 * as the author of the parts of the library used.
22 * This can be in the form of a textual message at program startup or
23 * in documentation (online or textual) provided with the package.
25 * Redistribution and use in source and binary forms, with or without
26 * modification, are permitted provided that the following conditions
28 * 1. Redistributions of source code must retain the copyright
29 * notice, this list of conditions and the following disclaimer.
30 * 2. Redistributions in binary form must reproduce the above copyright
31 * notice, this list of conditions and the following disclaimer in the
32 * documentation and/or other materials provided with the distribution.
33 * 3. All advertising materials mentioning features or use of this software
34 * must display the following acknowledgement:
35 * "This product includes cryptographic software written by
36 * Eric Young (eay@cryptsoft.com)"
37 * The word 'cryptographic' can be left out if the rouines from the library
38 * being used are not cryptographic related :-).
39 * 4. If you include any Windows specific code (or a derivative thereof) from
40 * the apps directory (application code) you must include an acknowledgement:
41 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
43 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
44 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
45 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
46 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
47 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
48 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
49 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
50 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
51 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
52 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
55 * The licence and distribution terms for any publically available version or
56 * derivative of this code cannot be changed. i.e. this code cannot simply be
57 * copied and put under another distribution licence
58 * [including the GNU Public Licence.]
70 # include "../e_os2.h"
74 * With IPv6, it looks like Digital has mixed up the proper order of
75 * recursive header file inclusion, resulting in the compiler complaining
76 * that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which is
77 * needed to have fileno() declared correctly... So let's define u_int
79 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
81 typedef unsigned int u_int;
90 #include <openssl/ssl.h>
98 #ifndef OPENSSL_NO_SOCK
100 # if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
104 static struct hostent *GetHostByName(char *name);
105 # if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
106 static void ssl_sock_cleanup(void);
108 static int ssl_sock_init(void);
109 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type);
110 static int init_server(int *sock, int port, int type);
111 static int init_server_long(int *sock, int port, char *ip, int type);
112 static int do_accept(int acc_sock, int *sock, char **host);
113 static int host_ip(char *str, unsigned char ip[4]);
115 # ifdef OPENSSL_SYS_WIN16
116 # define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
118 # define SOCKET_PROTOCOL IPPROTO_TCP
121 # if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
122 static int wsa_init_done = 0;
125 # ifdef OPENSSL_SYS_WINDOWS
126 static struct WSAData wsa_state;
127 static int wsa_init_done = 0;
129 # ifdef OPENSSL_SYS_WIN16
130 static HWND topWnd = 0;
131 static FARPROC lpTopWndProc = NULL;
132 static FARPROC lpTopHookProc = NULL;
133 extern HINSTANCE _hInstance; /* nice global CRT provides */
135 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
138 if (hwnd == topWnd) {
142 SetWindowLong(topWnd, GWL_WNDPROC, (LONG) lpTopWndProc);
147 return CallWindowProc(lpTopWndProc, hwnd, message, wParam, lParam);
150 static BOOL CALLBACK enumproc(HWND hwnd, LPARAM lParam)
156 # endif /* OPENSSL_SYS_WIN32 */
157 # endif /* OPENSSL_SYS_WINDOWS */
159 # ifdef OPENSSL_SYS_WINDOWS
160 static void ssl_sock_cleanup(void)
164 # ifndef OPENSSL_SYS_WINCE
165 WSACancelBlockingCall();
170 # elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
171 static void sock_cleanup(void)
180 static int ssl_sock_init(void)
183 extern int _watt_do_exit;
187 # elif defined(OPENSSL_SYS_WINDOWS)
188 if (!wsa_init_done) {
192 signal(SIGINT, (void (*)(int))ssl_sock_cleanup);
195 memset(&wsa_state, 0, sizeof(wsa_state));
196 if (WSAStartup(0x0101, &wsa_state) != 0) {
197 err = WSAGetLastError();
198 BIO_printf(bio_err, "unable to start WINSOCK, error code=%d\n",
202 # ifdef OPENSSL_SYS_WIN16
203 EnumTaskWindows(GetCurrentTask(), enumproc, 0L);
204 lpTopWndProc = (FARPROC) GetWindowLong(topWnd, GWL_WNDPROC);
205 lpTopHookProc = MakeProcInstance((FARPROC) topHookProc, _hInstance);
207 SetWindowLong(topWnd, GWL_WNDPROC, (LONG) lpTopHookProc);
208 # endif /* OPENSSL_SYS_WIN16 */
210 # elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
215 if (!wsa_init_done) {
218 signal(SIGINT, (void (*)(int))sock_cleanup);
222 wVerReq = MAKEWORD(2, 0);
223 err = WSAStartup(wVerReq, &wsaData);
225 BIO_printf(bio_err, "unable to start WINSOCK2, error code=%d\n",
230 # endif /* OPENSSL_SYS_WINDOWS */
234 int init_client(int *sock, char *host, int port, int type)
239 if (!host_ip(host, &(ip[0]))) {
244 return (init_client_ip(sock, ip, port, type));
247 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
250 struct sockaddr_in them;
253 if (!ssl_sock_init())
256 memset((char *)&them, 0, sizeof(them));
257 them.sin_family = AF_INET;
258 them.sin_port = htons((unsigned short)port);
259 addr = (unsigned long)
260 ((unsigned long)ip[0] << 24L) |
261 ((unsigned long)ip[1] << 16L) |
262 ((unsigned long)ip[2] << 8L) | ((unsigned long)ip[3]);
263 them.sin_addr.s_addr = htonl(addr);
265 if (type == SOCK_STREAM)
266 s = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL);
267 else /* ( type == SOCK_DGRAM) */
268 s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
270 if (s == INVALID_SOCKET) {
274 # ifndef OPENSSL_SYS_MPE
275 if (type == SOCK_STREAM) {
277 i = setsockopt(s, SOL_SOCKET, SO_KEEPALIVE, (char *)&i, sizeof(i));
285 if (connect(s, (struct sockaddr *)&them, sizeof(them)) == -1) {
294 int do_server(int port, int type, int *ret,
295 int (*cb) (char *hostname, int s, unsigned char *context),
296 unsigned char *context)
303 if (!init_server(&accept_socket, port, type))
307 *ret = accept_socket;
311 if (type == SOCK_STREAM) {
312 if (do_accept(accept_socket, &sock, &name) == 0) {
313 SHUTDOWN(accept_socket);
317 sock = accept_socket;
318 i = (*cb) (name, sock, context);
321 if (type == SOCK_STREAM)
324 SHUTDOWN2(accept_socket);
330 static int init_server_long(int *sock, int port, char *ip, int type)
333 struct sockaddr_in server;
336 if (!ssl_sock_init())
339 memset((char *)&server, 0, sizeof(server));
340 server.sin_family = AF_INET;
341 server.sin_port = htons((unsigned short)port);
343 server.sin_addr.s_addr = INADDR_ANY;
345 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
346 # ifndef BIT_FIELD_LIMITS
347 memcpy(&server.sin_addr.s_addr, ip, 4);
349 memcpy(&server.sin_addr, ip, 4);
352 if (type == SOCK_STREAM)
353 s = socket(AF_INET, SOCK_STREAM, SOCKET_PROTOCOL);
354 else /* type == SOCK_DGRAM */
355 s = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
357 if (s == INVALID_SOCKET)
359 # if defined SOL_SOCKET && defined SO_REUSEADDR
362 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, (void *)&j, sizeof j);
365 if (bind(s, (struct sockaddr *)&server, sizeof(server)) == -1) {
366 # ifndef OPENSSL_SYS_WINDOWS
371 /* Make it 128 for linux */
372 if (type == SOCK_STREAM && listen(s, 128) == -1)
377 if ((ret == 0) && (s != -1)) {
383 static int init_server(int *sock, int port, int type)
385 return (init_server_long(sock, port, NULL, type));
388 static int do_accept(int acc_sock, int *sock, char **host)
391 struct hostent *h1, *h2;
392 static struct sockaddr_in from;
394 /* struct linger ling; */
396 if (!ssl_sock_init())
399 # ifndef OPENSSL_SYS_WINDOWS
403 memset((char *)&from, 0, sizeof(from));
406 * Note: under VMS with SOCKETSHR the fourth parameter is currently of
407 * type (int *) whereas under other systems it is (void *) if you don't
408 * have a cast it will choke the compiler: if you do have a cast then you
409 * can either go for (int *) or (void *).
411 ret = accept(acc_sock, (struct sockaddr *)&from, (void *)&len);
412 if (ret == INVALID_SOCKET) {
413 # if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
415 i = WSAGetLastError();
416 BIO_printf(bio_err, "accept error %d\n", i);
418 if (errno == EINTR) {
424 fprintf(stderr, "errno=%d ", errno);
433 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
434 if (i < 0) { perror("linger"); return(0); }
436 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
437 if (i < 0) { perror("keepalive"); return(0); }
442 # ifndef BIT_FIELD_LIMITS
443 /* I should use WSAAsyncGetHostByName() under windows */
444 h1 = gethostbyaddr((char *)&from.sin_addr.s_addr,
445 sizeof(from.sin_addr.s_addr), AF_INET);
447 h1 = gethostbyaddr((char *)&from.sin_addr,
448 sizeof(struct in_addr), AF_INET);
451 BIO_printf(bio_err, "bad gethostbyaddr\n");
455 if ((*host = (char *)OPENSSL_malloc(strlen(h1->h_name) + 1)) == NULL) {
456 perror("OPENSSL_malloc");
459 BUF_strlcpy(*host, h1->h_name, strlen(h1->h_name) + 1);
461 h2 = GetHostByName(*host);
463 BIO_printf(bio_err, "gethostbyname failure\n");
466 if (h2->h_addrtype != AF_INET) {
467 BIO_printf(bio_err, "gethostbyname addr is not AF_INET\n");
476 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
482 p = strchr(str, ':');
484 BIO_printf(bio_err, "no port defined\n");
489 if ((ip != NULL) && !host_ip(str, ip))
491 if (host_ptr != NULL)
494 if (!extract_port(p, port_ptr))
501 static int host_ip(char *str, unsigned char ip[4])
506 if (sscanf(str, "%u.%u.%u.%u", &(in[0]), &(in[1]), &(in[2]), &(in[3])) ==
508 for (i = 0; i < 4; i++)
510 BIO_printf(bio_err, "invalid IP address\n");
517 } else { /* do a gethostbyname */
520 if (!ssl_sock_init())
523 he = GetHostByName(str);
525 BIO_printf(bio_err, "gethostbyname failure\n");
528 /* cast to short because of win16 winsock definition */
529 if ((short)he->h_addrtype != AF_INET) {
530 BIO_printf(bio_err, "gethostbyname addr is not AF_INET\n");
533 ip[0] = he->h_addr_list[0][0];
534 ip[1] = he->h_addr_list[0][1];
535 ip[2] = he->h_addr_list[0][2];
536 ip[3] = he->h_addr_list[0][3];
543 int extract_port(char *str, short *port_ptr)
550 *port_ptr = (unsigned short)i;
552 s = getservbyname(str, "tcp");
554 BIO_printf(bio_err, "getservbyname failure for %s\n", str);
557 *port_ptr = ntohs((unsigned short)s->s_port);
563 static struct ghbn_cache_st {
567 } ghbn_cache[GHBN_NUM];
569 static unsigned long ghbn_hits = 0L;
570 static unsigned long ghbn_miss = 0L;
572 static struct hostent *GetHostByName(char *name)
576 unsigned long low = (unsigned long)-1;
578 for (i = 0; i < GHBN_NUM; i++) {
579 if (low > ghbn_cache[i].order) {
580 low = ghbn_cache[i].order;
583 if (ghbn_cache[i].order > 0) {
584 if (strncmp(name, ghbn_cache[i].name, 128) == 0)
588 if (i == GHBN_NUM) { /* no hit */
590 ret = gethostbyname(name);
593 /* else add to cache */
594 if (strlen(name) < sizeof ghbn_cache[0].name) {
595 strcpy(ghbn_cache[lowi].name, name);
596 memcpy((char *)&(ghbn_cache[lowi].ent), ret,
597 sizeof(struct hostent));
598 ghbn_cache[lowi].order = ghbn_miss + ghbn_hits;
603 ret = &(ghbn_cache[i].ent);
604 ghbn_cache[i].order = ghbn_miss + ghbn_hits;