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 #ifdef FLAT_INC
66 #include "e_os2.h"
67 #else
68 #include "../e_os2.h"
69 #endif
70
71 /* With IPv6, it looks like Digital has mixed up the proper order of
72 recursive header file inclusion, resulting in the compiler complaining
73 that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
74 is needed to have fileno() declared correctly... So let's define u_int */
75 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
76 #define __U_INT
77 typedef unsigned int u_int;
78 #endif
79
80 #define USE_SOCKETS
81 #define NON_MAIN
82 #include "apps.h"
83 #undef USE_SOCKETS
84 #undef NON_MAIN
85 #include "s_apps.h"
86 #include <openssl/ssl.h>
87
88 #ifdef FLAT_INC
89 #include "e_os.h"
90 #else
91 #include "../e_os.h"
92 #endif
93
94 #ifndef OPENSSL_NO_SOCK
95
96 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
97 #include "netdb.h"
98 #endif
99
100 static struct hostent *GetHostByName(char *name);
101 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
102 static void ssl_sock_cleanup(void);
103 #endif
104 static int ssl_sock_init(void);
105 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
106 static int init_server(int *sock, int port, int type);
107 static int init_server_long(int *sock, int port,char *ip, int type);
108 static int do_accept(int acc_sock, int *sock, char **host);
109 static int host_ip(char *str, unsigned char ip[4]);
110
111 #ifdef OPENSSL_SYS_WIN16
112 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
113 #else
114 #define SOCKET_PROTOCOL IPPROTO_TCP
115 #endif
116
117 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
118 static int wsa_init_done=0;
119 #endif
120
121 #ifdef OPENSSL_SYS_WINDOWS
122 static struct WSAData wsa_state;
123 static int wsa_init_done=0;
124
125 #ifdef OPENSSL_SYS_WIN16
126 static HWND topWnd=0;
127 static FARPROC lpTopWndProc=NULL;
128 static FARPROC lpTopHookProc=NULL;
129 extern HINSTANCE _hInstance; /* nice global CRT provides */
130
topHookProc(HWND hwnd,UINT message,WPARAM wParam,LPARAM lParam)131 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
132 LPARAM lParam)
133 {
134 if (hwnd == topWnd)
135 {
136 switch(message)
137 {
138 case WM_DESTROY:
139 case WM_CLOSE:
140 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
141 ssl_sock_cleanup();
142 break;
143 }
144 }
145 return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
146 }
147
enumproc(HWND hwnd,LPARAM lParam)148 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
149 {
150 topWnd=hwnd;
151 return(FALSE);
152 }
153
154 #endif /* OPENSSL_SYS_WIN32 */
155 #endif /* OPENSSL_SYS_WINDOWS */
156
157 #ifdef OPENSSL_SYS_WINDOWS
ssl_sock_cleanup(void)158 static void ssl_sock_cleanup(void)
159 {
160 if (wsa_init_done)
161 {
162 wsa_init_done=0;
163 #ifndef OPENSSL_SYS_WINCE
164 WSACancelBlockingCall();
165 #endif
166 WSACleanup();
167 }
168 }
169 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
sock_cleanup(void)170 static void sock_cleanup(void)
171 {
172 if (wsa_init_done)
173 {
174 wsa_init_done=0;
175 WSACleanup();
176 }
177 }
178 #endif
179
ssl_sock_init(void)180 static int ssl_sock_init(void)
181 {
182 #ifdef WATT32
183 extern int _watt_do_exit;
184 _watt_do_exit = 0;
185 if (sock_init())
186 return (0);
187 #elif defined(OPENSSL_SYS_WINDOWS)
188 if (!wsa_init_done)
189 {
190 int err;
191
192 #ifdef SIGINT
193 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
194 #endif
195 wsa_init_done=1;
196 memset(&wsa_state,0,sizeof(wsa_state));
197 if (WSAStartup(0x0101,&wsa_state)!=0)
198 {
199 err=WSAGetLastError();
200 BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
201 return(0);
202 }
203
204 #ifdef OPENSSL_SYS_WIN16
205 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
206 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
207 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
208
209 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
210 #endif /* OPENSSL_SYS_WIN16 */
211 }
212 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
213 WORD wVerReq;
214 WSADATA wsaData;
215 int err;
216
217 if (!wsa_init_done)
218 {
219
220 # ifdef SIGINT
221 signal(SIGINT,(void (*)(int))sock_cleanup);
222 # endif
223
224 wsa_init_done=1;
225 wVerReq = MAKEWORD( 2, 0 );
226 err = WSAStartup(wVerReq,&wsaData);
227 if (err != 0)
228 {
229 BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
230 return(0);
231 }
232 }
233 #endif /* OPENSSL_SYS_WINDOWS */
234 return(1);
235 }
236
init_client(int * sock,char * host,int port,int type)237 int init_client(int *sock, char *host, int port, int type)
238 {
239 unsigned char ip[4];
240
241 if (!host_ip(host,&(ip[0])))
242 {
243 return(0);
244 }
245 return(init_client_ip(sock,ip,port,type));
246 }
247
init_client_ip(int * sock,unsigned char ip[4],int port,int type)248 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
249 {
250 unsigned long addr;
251 struct sockaddr_in them;
252 int s,i;
253
254 if (!ssl_sock_init()) return(0);
255
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)|
263 ((unsigned long)ip[3]);
264 them.sin_addr.s_addr=htonl(addr);
265
266 if (type == SOCK_STREAM)
267 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
268 else /* ( type == SOCK_DGRAM) */
269 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
270
271 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
272
273 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
274 if (type == SOCK_STREAM)
275 {
276 i=0;
277 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
278 if (i < 0) { perror("keepalive"); return(0); }
279 }
280 #endif
281
282 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
283 { closesocket(s); perror("connect"); return(0); }
284 *sock=s;
285 return(1);
286 }
287
do_server(int port,int type,int * ret,int (* cb)(char * hostname,int s,unsigned char * context),unsigned char * context)288 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
289 {
290 int sock;
291 char *name = NULL;
292 int accept_socket = 0;
293 int i;
294
295 if (!init_server(&accept_socket,port,type)) return(0);
296
297 if (ret != NULL)
298 {
299 *ret=accept_socket;
300 /* return(1);*/
301 }
302 for (;;)
303 {
304 if (type==SOCK_STREAM)
305 {
306 if (do_accept(accept_socket,&sock,&name) == 0)
307 {
308 SHUTDOWN(accept_socket);
309 return(0);
310 }
311 }
312 else
313 sock = accept_socket;
314 i=(*cb)(name,sock, context);
315 if (name != NULL) OPENSSL_free(name);
316 if (type==SOCK_STREAM)
317 SHUTDOWN2(sock);
318 if (i < 0)
319 {
320 SHUTDOWN2(accept_socket);
321 return(i);
322 }
323 }
324 }
325
init_server_long(int * sock,int port,char * ip,int type)326 static int init_server_long(int *sock, int port, char *ip, int type)
327 {
328 int ret=0;
329 struct sockaddr_in server;
330 int s= -1;
331
332 if (!ssl_sock_init()) return(0);
333
334 memset((char *)&server,0,sizeof(server));
335 server.sin_family=AF_INET;
336 server.sin_port=htons((unsigned short)port);
337 if (ip == NULL)
338 server.sin_addr.s_addr=INADDR_ANY;
339 else
340 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
341 #ifndef BIT_FIELD_LIMITS
342 memcpy(&server.sin_addr.s_addr,ip,4);
343 #else
344 memcpy(&server.sin_addr,ip,4);
345 #endif
346
347 if (type == SOCK_STREAM)
348 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
349 else /* type == SOCK_DGRAM */
350 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
351
352 if (s == INVALID_SOCKET) goto err;
353 #if defined SOL_SOCKET && defined SO_REUSEADDR
354 {
355 int j = 1;
356 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
357 (void *) &j, sizeof j);
358 }
359 #endif
360 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
361 {
362 #ifndef OPENSSL_SYS_WINDOWS
363 perror("bind");
364 #endif
365 goto err;
366 }
367 /* Make it 128 for linux */
368 if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
369 *sock=s;
370 ret=1;
371 err:
372 if ((ret == 0) && (s != -1))
373 {
374 SHUTDOWN(s);
375 }
376 return(ret);
377 }
378
init_server(int * sock,int port,int type)379 static int init_server(int *sock, int port, int type)
380 {
381 return(init_server_long(sock, port, NULL, type));
382 }
383
do_accept(int acc_sock,int * sock,char ** host)384 static int do_accept(int acc_sock, int *sock, char **host)
385 {
386 int ret;
387 struct hostent *h1,*h2;
388 static struct sockaddr_in from;
389 int len;
390 /* struct linger ling; */
391
392 if (!ssl_sock_init()) return(0);
393
394 #ifndef OPENSSL_SYS_WINDOWS
395 redoit:
396 #endif
397
398 memset((char *)&from,0,sizeof(from));
399 len=sizeof(from);
400 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
401 * of type (int *) whereas under other systems it is (void *) if
402 * you don't have a cast it will choke the compiler: if you do
403 * have a cast then you can either go for (int *) or (void *).
404 */
405 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
406 if (ret == INVALID_SOCKET)
407 {
408 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
409 int i;
410 i=WSAGetLastError();
411 BIO_printf(bio_err,"accept error %d\n",i);
412 #else
413 if (errno == EINTR)
414 {
415 /*check_timeout(); */
416 goto redoit;
417 }
418 fprintf(stderr,"errno=%d ",errno);
419 perror("accept");
420 #endif
421 return(0);
422 }
423
424 /*
425 ling.l_onoff=1;
426 ling.l_linger=0;
427 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
428 if (i < 0) { perror("linger"); return(0); }
429 i=0;
430 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
431 if (i < 0) { perror("keepalive"); return(0); }
432 */
433
434 if (host == NULL) goto end;
435 #ifndef BIT_FIELD_LIMITS
436 /* I should use WSAAsyncGetHostByName() under windows */
437 h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
438 sizeof(from.sin_addr.s_addr),AF_INET);
439 #else
440 h1=gethostbyaddr((char *)&from.sin_addr,
441 sizeof(struct in_addr),AF_INET);
442 #endif
443 if (h1 == NULL)
444 {
445 BIO_printf(bio_err,"bad gethostbyaddr\n");
446 *host=NULL;
447 /* return(0); */
448 }
449 else
450 {
451 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
452 {
453 perror("OPENSSL_malloc");
454 return(0);
455 }
456 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
457
458 h2=GetHostByName(*host);
459 if (h2 == NULL)
460 {
461 BIO_printf(bio_err,"gethostbyname failure\n");
462 return(0);
463 }
464 if (h2->h_addrtype != AF_INET)
465 {
466 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
467 return(0);
468 }
469 }
470 end:
471 *sock=ret;
472 return(1);
473 }
474
extract_host_port(char * str,char ** host_ptr,unsigned char * ip,short * port_ptr)475 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
476 short *port_ptr)
477 {
478 char *h,*p;
479
480 h=str;
481 p=strchr(str,':');
482 if (p == NULL)
483 {
484 BIO_printf(bio_err,"no port defined\n");
485 return(0);
486 }
487 *(p++)='\0';
488
489 if ((ip != NULL) && !host_ip(str,ip))
490 goto err;
491 if (host_ptr != NULL) *host_ptr=h;
492
493 if (!extract_port(p,port_ptr))
494 goto err;
495 return(1);
496 err:
497 return(0);
498 }
499
host_ip(char * str,unsigned char ip[4])500 static int host_ip(char *str, unsigned char ip[4])
501 {
502 unsigned int in[4];
503 int i;
504
505 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
506 {
507 for (i=0; i<4; i++)
508 if (in[i] > 255)
509 {
510 BIO_printf(bio_err,"invalid IP address\n");
511 goto err;
512 }
513 ip[0]=in[0];
514 ip[1]=in[1];
515 ip[2]=in[2];
516 ip[3]=in[3];
517 }
518 else
519 { /* do a gethostbyname */
520 struct hostent *he;
521
522 if (!ssl_sock_init()) return(0);
523
524 he=GetHostByName(str);
525 if (he == NULL)
526 {
527 BIO_printf(bio_err,"gethostbyname failure\n");
528 goto err;
529 }
530 /* cast to short because of win16 winsock definition */
531 if ((short)he->h_addrtype != AF_INET)
532 {
533 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
534 return(0);
535 }
536 ip[0]=he->h_addr_list[0][0];
537 ip[1]=he->h_addr_list[0][1];
538 ip[2]=he->h_addr_list[0][2];
539 ip[3]=he->h_addr_list[0][3];
540 }
541 return(1);
542 err:
543 return(0);
544 }
545
extract_port(char * str,short * port_ptr)546 int extract_port(char *str, short *port_ptr)
547 {
548 int i;
549 struct servent *s;
550
551 i=atoi(str);
552 if (i != 0)
553 *port_ptr=(unsigned short)i;
554 else
555 {
556 s=getservbyname(str,"tcp");
557 if (s == NULL)
558 {
559 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
560 return(0);
561 }
562 *port_ptr=ntohs((unsigned short)s->s_port);
563 }
564 return(1);
565 }
566
567 #define GHBN_NUM 4
568 static struct ghbn_cache_st
569 {
570 char name[128];
571 struct hostent ent;
572 unsigned long order;
573 } ghbn_cache[GHBN_NUM];
574
575 static unsigned long ghbn_hits=0L;
576 static unsigned long ghbn_miss=0L;
577
GetHostByName(char * name)578 static struct hostent *GetHostByName(char *name)
579 {
580 struct hostent *ret;
581 int i,lowi=0;
582 unsigned long low= (unsigned long)-1;
583
584 for (i=0; i<GHBN_NUM; i++)
585 {
586 if (low > ghbn_cache[i].order)
587 {
588 low=ghbn_cache[i].order;
589 lowi=i;
590 }
591 if (ghbn_cache[i].order > 0)
592 {
593 if (strncmp(name,ghbn_cache[i].name,128) == 0)
594 break;
595 }
596 }
597 if (i == GHBN_NUM) /* no hit*/
598 {
599 ghbn_miss++;
600 ret=gethostbyname(name);
601 if (ret == NULL) return(NULL);
602 /* else add to cache */
603 if(strlen(name) < sizeof ghbn_cache[0].name)
604 {
605 strcpy(ghbn_cache[lowi].name,name);
606 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
607 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
608 }
609 return(ret);
610 }
611 else
612 {
613 ghbn_hits++;
614 ret= &(ghbn_cache[i].ent);
615 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
616 return(ret);
617 }
618 }
619
620 #endif
621