1 /* apps/s_socket.c - socket-related functions used by s_client and s_server */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
3 * All rights reserved.
4 *
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.
8 *
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).
15 *
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.
22 *
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
25 * are met:
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)"
40 *
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
51 * SUCH DAMAGE.
52 *
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.]
57 */
58
59 #include <stdio.h>
60 #include <stdlib.h>
61 #include <string.h>
62 #include <errno.h>
63 #include <signal.h>
64
65 /* With IPv6, it looks like Digital has mixed up the proper order of
66 recursive header file inclusion, resulting in the compiler complaining
67 that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
68 is needed to have fileno() declared correctly... So let's define u_int */
69 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
70 #define __U_INT
71 typedef unsigned int u_int;
72 #endif
73
74 #define USE_SOCKETS
75 #define NON_MAIN
76 #include "apps.h"
77 #undef USE_SOCKETS
78 #undef NON_MAIN
79 #include "s_apps.h"
80 #include <openssl/ssl.h>
81
82 #ifdef FLAT_INC
83 #include "e_os.h"
84 #else
85 #include "../e_os.h"
86 #endif
87
88 #ifndef OPENSSL_NO_SOCK
89
90 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
91 #include "netdb.h"
92 #endif
93
94 static struct hostent *GetHostByName(char *name);
95 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
96 static void ssl_sock_cleanup(void);
97 #endif
98 static int ssl_sock_init(void);
99 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
100 static int init_server(int *sock, int port, int type);
101 static int init_server_long(int *sock, int port,char *ip, int type);
102 static int do_accept(int acc_sock, int *sock, char **host);
103 static int host_ip(char *str, unsigned char ip[4]);
104
105 #ifdef OPENSSL_SYS_WIN16
106 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
107 #else
108 #define SOCKET_PROTOCOL IPPROTO_TCP
109 #endif
110
111 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
112 static int wsa_init_done=0;
113 #endif
114
115 #ifdef OPENSSL_SYS_WINDOWS
116 static struct WSAData wsa_state;
117 static int wsa_init_done=0;
118
119 #ifdef OPENSSL_SYS_WIN16
120 static HWND topWnd=0;
121 static FARPROC lpTopWndProc=NULL;
122 static FARPROC lpTopHookProc=NULL;
123 extern HINSTANCE _hInstance; /* nice global CRT provides */
124
topHookProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)125 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
126 LPARAM lParam)
127 {
128 if (hwnd == topWnd)
129 {
130 switch(message)
131 {
132 case WM_DESTROY:
133 case WM_CLOSE:
134 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
135 ssl_sock_cleanup();
136 break;
137 }
138 }
139 return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
140 }
141
enumproc(HWND hwnd,LPARAM lParam)142 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
143 {
144 topWnd=hwnd;
145 return(FALSE);
146 }
147
148 #endif /* OPENSSL_SYS_WIN32 */
149 #endif /* OPENSSL_SYS_WINDOWS */
150
151 #ifdef OPENSSL_SYS_WINDOWS
ssl_sock_cleanup(void)152 static void ssl_sock_cleanup(void)
153 {
154 if (wsa_init_done)
155 {
156 wsa_init_done=0;
157 #ifndef OPENSSL_SYS_WINCE
158 WSACancelBlockingCall();
159 #endif
160 WSACleanup();
161 }
162 }
163 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
sock_cleanup(void)164 static void sock_cleanup(void)
165 {
166 if (wsa_init_done)
167 {
168 wsa_init_done=0;
169 WSACleanup();
170 }
171 }
172 #endif
173
ssl_sock_init(void)174 static int ssl_sock_init(void)
175 {
176 #ifdef WATT32
177 extern int _watt_do_exit;
178 _watt_do_exit = 0;
179 if (sock_init())
180 return (0);
181 #elif defined(OPENSSL_SYS_WINDOWS)
182 if (!wsa_init_done)
183 {
184 int err;
185
186 #ifdef SIGINT
187 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
188 #endif
189 wsa_init_done=1;
190 memset(&wsa_state,0,sizeof(wsa_state));
191 if (WSAStartup(0x0101,&wsa_state)!=0)
192 {
193 err=WSAGetLastError();
194 BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
195 return(0);
196 }
197
198 #ifdef OPENSSL_SYS_WIN16
199 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
200 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
201 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
202
203 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
204 #endif /* OPENSSL_SYS_WIN16 */
205 }
206 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
207 WORD wVerReq;
208 WSADATA wsaData;
209 int err;
210
211 if (!wsa_init_done)
212 {
213
214 # ifdef SIGINT
215 signal(SIGINT,(void (*)(int))sock_cleanup);
216 # endif
217
218 wsa_init_done=1;
219 wVerReq = MAKEWORD( 2, 0 );
220 err = WSAStartup(wVerReq,&wsaData);
221 if (err != 0)
222 {
223 BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
224 return(0);
225 }
226 }
227 #endif /* OPENSSL_SYS_WINDOWS */
228 return(1);
229 }
230
init_client(int * sock,char * host,int port,int type)231 int init_client(int *sock, char *host, int port, int type)
232 {
233 unsigned char ip[4];
234 short p=0;
235
236 if (!host_ip(host,&(ip[0])))
237 {
238 return(0);
239 }
240 if (p != 0) port=p;
241 return(init_client_ip(sock,ip,port,type));
242 }
243
init_client_ip(int * sock,unsigned char ip[4],int port,int type)244 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
245 {
246 unsigned long addr;
247 struct sockaddr_in them;
248 int s,i;
249
250 if (!ssl_sock_init()) return(0);
251
252 memset((char *)&them,0,sizeof(them));
253 them.sin_family=AF_INET;
254 them.sin_port=htons((unsigned short)port);
255 addr=(unsigned long)
256 ((unsigned long)ip[0]<<24L)|
257 ((unsigned long)ip[1]<<16L)|
258 ((unsigned long)ip[2]<< 8L)|
259 ((unsigned long)ip[3]);
260 them.sin_addr.s_addr=htonl(addr);
261
262 if (type == SOCK_STREAM)
263 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
264 else /* ( type == SOCK_DGRAM) */
265 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
266
267 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
268
269 #ifndef OPENSSL_SYS_MPE
270 if (type == SOCK_STREAM)
271 {
272 i=0;
273 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
274 if (i < 0) { perror("keepalive"); return(0); }
275 }
276 #endif
277
278 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
279 { close(s); perror("connect"); return(0); }
280 *sock=s;
281 return(1);
282 }
283
do_server(int port,int type,int * ret,int (* cb)(char * hostname,int s,unsigned char * context),unsigned char * context)284 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
285 {
286 int sock;
287 char *name = NULL;
288 int accept_socket;
289 int i;
290
291 if (!init_server(&accept_socket,port,type)) return(0);
292
293 if (ret != NULL)
294 {
295 *ret=accept_socket;
296 /* return(1);*/
297 }
298 for (;;)
299 {
300 if (type==SOCK_STREAM)
301 {
302 if (do_accept(accept_socket,&sock,&name) == 0)
303 {
304 SHUTDOWN(accept_socket);
305 return(0);
306 }
307 }
308 else
309 sock = accept_socket;
310 i=(*cb)(name,sock, context);
311 if (name != NULL) OPENSSL_free(name);
312 if (type==SOCK_STREAM)
313 SHUTDOWN2(sock);
314 if (i < 0)
315 {
316 SHUTDOWN2(accept_socket);
317 return(i);
318 }
319 }
320 }
321
init_server_long(int * sock,int port,char * ip,int type)322 static int init_server_long(int *sock, int port, char *ip, int type)
323 {
324 int ret=0;
325 struct sockaddr_in server;
326 int s= -1,i;
327
328 if (!ssl_sock_init()) return(0);
329
330 memset((char *)&server,0,sizeof(server));
331 server.sin_family=AF_INET;
332 server.sin_port=htons((unsigned short)port);
333 if (ip == NULL)
334 server.sin_addr.s_addr=INADDR_ANY;
335 else
336 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
337 #ifndef BIT_FIELD_LIMITS
338 memcpy(&server.sin_addr.s_addr,ip,4);
339 #else
340 memcpy(&server.sin_addr,ip,4);
341 #endif
342
343 if (type == SOCK_STREAM)
344 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
345 else /* type == SOCK_DGRAM */
346 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
347
348 if (s == INVALID_SOCKET) goto err;
349 #if defined SOL_SOCKET && defined SO_REUSEADDR
350 {
351 int j = 1;
352 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
353 (void *) &j, sizeof j);
354 }
355 #endif
356 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
357 {
358 #ifndef OPENSSL_SYS_WINDOWS
359 perror("bind");
360 #endif
361 goto err;
362 }
363 /* Make it 128 for linux */
364 if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
365 i=0;
366 *sock=s;
367 ret=1;
368 err:
369 if ((ret == 0) && (s != -1))
370 {
371 SHUTDOWN(s);
372 }
373 return(ret);
374 }
375
init_server(int * sock,int port,int type)376 static int init_server(int *sock, int port, int type)
377 {
378 return(init_server_long(sock, port, NULL, type));
379 }
380
do_accept(int acc_sock,int * sock,char ** host)381 static int do_accept(int acc_sock, int *sock, char **host)
382 {
383 int ret,i;
384 struct hostent *h1,*h2;
385 static struct sockaddr_in from;
386 int len;
387 /* struct linger ling; */
388
389 if (!ssl_sock_init()) return(0);
390
391 #ifndef OPENSSL_SYS_WINDOWS
392 redoit:
393 #endif
394
395 memset((char *)&from,0,sizeof(from));
396 len=sizeof(from);
397 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
398 * of type (int *) whereas under other systems it is (void *) if
399 * you don't have a cast it will choke the compiler: if you do
400 * have a cast then you can either go for (int *) or (void *).
401 */
402 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
403 if (ret == INVALID_SOCKET)
404 {
405 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
406 i=WSAGetLastError();
407 BIO_printf(bio_err,"accept error %d\n",i);
408 #else
409 if (errno == EINTR)
410 {
411 /*check_timeout(); */
412 goto redoit;
413 }
414 fprintf(stderr,"errno=%d ",errno);
415 perror("accept");
416 #endif
417 return(0);
418 }
419
420 /*
421 ling.l_onoff=1;
422 ling.l_linger=0;
423 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
424 if (i < 0) { perror("linger"); return(0); }
425 i=0;
426 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
427 if (i < 0) { perror("keepalive"); return(0); }
428 */
429
430 if (host == NULL) goto end;
431 #ifndef BIT_FIELD_LIMITS
432 /* I should use WSAAsyncGetHostByName() under windows */
433 h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
434 sizeof(from.sin_addr.s_addr),AF_INET);
435 #else
436 h1=gethostbyaddr((char *)&from.sin_addr,
437 sizeof(struct in_addr),AF_INET);
438 #endif
439 if (h1 == NULL)
440 {
441 BIO_printf(bio_err,"bad gethostbyaddr\n");
442 *host=NULL;
443 /* return(0); */
444 }
445 else
446 {
447 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
448 {
449 perror("OPENSSL_malloc");
450 return(0);
451 }
452 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
453
454 h2=GetHostByName(*host);
455 if (h2 == NULL)
456 {
457 BIO_printf(bio_err,"gethostbyname failure\n");
458 return(0);
459 }
460 i=0;
461 if (h2->h_addrtype != AF_INET)
462 {
463 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
464 return(0);
465 }
466 }
467 end:
468 *sock=ret;
469 return(1);
470 }
471
extract_host_port(char * str,char ** host_ptr,unsigned char * ip,short * port_ptr)472 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
473 short *port_ptr)
474 {
475 char *h,*p;
476
477 h=str;
478 p=strchr(str,':');
479 if (p == NULL)
480 {
481 BIO_printf(bio_err,"no port defined\n");
482 return(0);
483 }
484 *(p++)='\0';
485
486 if ((ip != NULL) && !host_ip(str,ip))
487 goto err;
488 if (host_ptr != NULL) *host_ptr=h;
489
490 if (!extract_port(p,port_ptr))
491 goto err;
492 return(1);
493 err:
494 return(0);
495 }
496
host_ip(char * str,unsigned char ip[4])497 static int host_ip(char *str, unsigned char ip[4])
498 {
499 unsigned int in[4];
500 int i;
501
502 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
503 {
504 for (i=0; i<4; i++)
505 if (in[i] > 255)
506 {
507 BIO_printf(bio_err,"invalid IP address\n");
508 goto err;
509 }
510 ip[0]=in[0];
511 ip[1]=in[1];
512 ip[2]=in[2];
513 ip[3]=in[3];
514 }
515 else
516 { /* do a gethostbyname */
517 struct hostent *he;
518
519 if (!ssl_sock_init()) return(0);
520
521 he=GetHostByName(str);
522 if (he == NULL)
523 {
524 BIO_printf(bio_err,"gethostbyname failure\n");
525 goto err;
526 }
527 /* cast to short because of win16 winsock definition */
528 if ((short)he->h_addrtype != AF_INET)
529 {
530 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
531 return(0);
532 }
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];
537 }
538 return(1);
539 err:
540 return(0);
541 }
542
extract_port(char * str,short * port_ptr)543 int extract_port(char *str, short *port_ptr)
544 {
545 int i;
546 struct servent *s;
547
548 i=atoi(str);
549 if (i != 0)
550 *port_ptr=(unsigned short)i;
551 else
552 {
553 s=getservbyname(str,"tcp");
554 if (s == NULL)
555 {
556 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
557 return(0);
558 }
559 *port_ptr=ntohs((unsigned short)s->s_port);
560 }
561 return(1);
562 }
563
564 #define GHBN_NUM 4
565 static struct ghbn_cache_st
566 {
567 char name[128];
568 struct hostent ent;
569 unsigned long order;
570 } ghbn_cache[GHBN_NUM];
571
572 static unsigned long ghbn_hits=0L;
573 static unsigned long ghbn_miss=0L;
574
GetHostByName(char * name)575 static struct hostent *GetHostByName(char *name)
576 {
577 struct hostent *ret;
578 int i,lowi=0;
579 unsigned long low= (unsigned long)-1;
580
581 for (i=0; i<GHBN_NUM; i++)
582 {
583 if (low > ghbn_cache[i].order)
584 {
585 low=ghbn_cache[i].order;
586 lowi=i;
587 }
588 if (ghbn_cache[i].order > 0)
589 {
590 if (strncmp(name,ghbn_cache[i].name,128) == 0)
591 break;
592 }
593 }
594 if (i == GHBN_NUM) /* no hit*/
595 {
596 ghbn_miss++;
597 ret=gethostbyname(name);
598 if (ret == NULL) return(NULL);
599 /* else add to cache */
600 if(strlen(name) < sizeof ghbn_cache[0].name)
601 {
602 strcpy(ghbn_cache[lowi].name,name);
603 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
604 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
605 }
606 return(ret);
607 }
608 else
609 {
610 ghbn_hits++;
611 ret= &(ghbn_cache[i].ent);
612 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
613 return(ret);
614 }
615 }
616
617 #endif
618