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 memset(ip, '\0', sizeof ip);
242 if (!host_ip(host,&(ip[0])))
243 return 0;
244 return init_client_ip(sock,ip,port,type);
245 }
246
init_client_ip(int * sock,unsigned char ip[4],int port,int type)247 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
248 {
249 unsigned long addr;
250 struct sockaddr_in them;
251 int s,i;
252
253 if (!ssl_sock_init()) return(0);
254
255 memset((char *)&them,0,sizeof(them));
256 them.sin_family=AF_INET;
257 them.sin_port=htons((unsigned short)port);
258 addr=(unsigned long)
259 ((unsigned long)ip[0]<<24L)|
260 ((unsigned long)ip[1]<<16L)|
261 ((unsigned long)ip[2]<< 8L)|
262 ((unsigned long)ip[3]);
263 them.sin_addr.s_addr=htonl(addr);
264
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);
269
270 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
271
272 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
273 if (type == SOCK_STREAM)
274 {
275 i=0;
276 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
277 if (i < 0) { perror("keepalive"); return(0); }
278 }
279 #endif
280
281 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
282 { closesocket(s); perror("connect"); return(0); }
283 *sock=s;
284 return(1);
285 }
286
do_server(int port,int type,int * ret,int (* cb)(char * hostname,int s,unsigned char * context),unsigned char * context)287 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
288 {
289 int sock;
290 char *name = NULL;
291 int accept_socket = 0;
292 int i;
293
294 if (!init_server(&accept_socket,port,type)) return(0);
295
296 if (ret != NULL)
297 {
298 *ret=accept_socket;
299 /* return(1);*/
300 }
301 for (;;)
302 {
303 if (type==SOCK_STREAM)
304 {
305 if (do_accept(accept_socket,&sock,&name) == 0)
306 {
307 SHUTDOWN(accept_socket);
308 return(0);
309 }
310 }
311 else
312 sock = accept_socket;
313 i=(*cb)(name,sock, context);
314 if (name != NULL) OPENSSL_free(name);
315 if (type==SOCK_STREAM)
316 SHUTDOWN2(sock);
317 if (i < 0)
318 {
319 SHUTDOWN2(accept_socket);
320 return(i);
321 }
322 }
323 }
324
init_server_long(int * sock,int port,char * ip,int type)325 static int init_server_long(int *sock, int port, char *ip, int type)
326 {
327 int ret=0;
328 struct sockaddr_in server;
329 int s= -1;
330
331 if (!ssl_sock_init()) return(0);
332
333 memset((char *)&server,0,sizeof(server));
334 server.sin_family=AF_INET;
335 server.sin_port=htons((unsigned short)port);
336 if (ip == NULL)
337 server.sin_addr.s_addr=INADDR_ANY;
338 else
339 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
340 #ifndef BIT_FIELD_LIMITS
341 memcpy(&server.sin_addr.s_addr,ip,4);
342 #else
343 memcpy(&server.sin_addr,ip,4);
344 #endif
345
346 if (type == SOCK_STREAM)
347 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
348 else /* type == SOCK_DGRAM */
349 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
350
351 if (s == INVALID_SOCKET) goto err;
352 #if defined SOL_SOCKET && defined SO_REUSEADDR
353 {
354 int j = 1;
355 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
356 (void *) &j, sizeof j);
357 }
358 #endif
359 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
360 {
361 #ifndef OPENSSL_SYS_WINDOWS
362 perror("bind");
363 #endif
364 goto err;
365 }
366 /* Make it 128 for linux */
367 if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
368 *sock=s;
369 ret=1;
370 err:
371 if ((ret == 0) && (s != -1))
372 {
373 SHUTDOWN(s);
374 }
375 return(ret);
376 }
377
init_server(int * sock,int port,int type)378 static int init_server(int *sock, int port, int type)
379 {
380 return(init_server_long(sock, port, NULL, type));
381 }
382
do_accept(int acc_sock,int * sock,char ** host)383 static int do_accept(int acc_sock, int *sock, char **host)
384 {
385 int ret;
386 struct hostent *h1,*h2;
387 static struct sockaddr_in from;
388 int len;
389 /* struct linger ling; */
390
391 if (!ssl_sock_init()) return(0);
392
393 #ifndef OPENSSL_SYS_WINDOWS
394 redoit:
395 #endif
396
397 memset((char *)&from,0,sizeof(from));
398 len=sizeof(from);
399 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
400 * of type (int *) whereas under other systems it is (void *) if
401 * you don't have a cast it will choke the compiler: if you do
402 * have a cast then you can either go for (int *) or (void *).
403 */
404 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
405 if (ret == INVALID_SOCKET)
406 {
407 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
408 int i;
409 i=WSAGetLastError();
410 BIO_printf(bio_err,"accept error %d\n",i);
411 #else
412 if (errno == EINTR)
413 {
414 /*check_timeout(); */
415 goto redoit;
416 }
417 fprintf(stderr,"errno=%d ",errno);
418 perror("accept");
419 #endif
420 return(0);
421 }
422
423 /*
424 ling.l_onoff=1;
425 ling.l_linger=0;
426 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
427 if (i < 0) { perror("linger"); return(0); }
428 i=0;
429 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
430 if (i < 0) { perror("keepalive"); return(0); }
431 */
432
433 if (host == NULL) goto end;
434 #ifndef BIT_FIELD_LIMITS
435 /* I should use WSAAsyncGetHostByName() under windows */
436 h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
437 sizeof(from.sin_addr.s_addr),AF_INET);
438 #else
439 h1=gethostbyaddr((char *)&from.sin_addr,
440 sizeof(struct in_addr),AF_INET);
441 #endif
442 if (h1 == NULL)
443 {
444 BIO_printf(bio_err,"bad gethostbyaddr\n");
445 *host=NULL;
446 /* return(0); */
447 }
448 else
449 {
450 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
451 {
452 perror("OPENSSL_malloc");
453 return(0);
454 }
455 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
456
457 h2=GetHostByName(*host);
458 if (h2 == NULL)
459 {
460 BIO_printf(bio_err,"gethostbyname failure\n");
461 return(0);
462 }
463 if (h2->h_addrtype != AF_INET)
464 {
465 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
466 return(0);
467 }
468 }
469 end:
470 *sock=ret;
471 return(1);
472 }
473
extract_host_port(char * str,char ** host_ptr,unsigned char * ip,short * port_ptr)474 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
475 short *port_ptr)
476 {
477 char *h,*p;
478
479 h=str;
480 p=strchr(str,':');
481 if (p == NULL)
482 {
483 BIO_printf(bio_err,"no port defined\n");
484 return(0);
485 }
486 *(p++)='\0';
487
488 if ((ip != NULL) && !host_ip(str,ip))
489 goto err;
490 if (host_ptr != NULL) *host_ptr=h;
491
492 if (!extract_port(p,port_ptr))
493 goto err;
494 return(1);
495 err:
496 return(0);
497 }
498
host_ip(char * str,unsigned char ip[4])499 static int host_ip(char *str, unsigned char ip[4])
500 {
501 unsigned int in[4];
502 int i;
503
504 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
505 {
506 for (i=0; i<4; i++)
507 if (in[i] > 255)
508 {
509 BIO_printf(bio_err,"invalid IP address\n");
510 goto err;
511 }
512 ip[0]=in[0];
513 ip[1]=in[1];
514 ip[2]=in[2];
515 ip[3]=in[3];
516 }
517 else
518 { /* do a gethostbyname */
519 struct hostent *he;
520
521 if (!ssl_sock_init()) return(0);
522
523 he=GetHostByName(str);
524 if (he == NULL)
525 {
526 BIO_printf(bio_err,"gethostbyname failure\n");
527 goto err;
528 }
529 /* cast to short because of win16 winsock definition */
530 if ((short)he->h_addrtype != AF_INET)
531 {
532 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
533 return(0);
534 }
535 ip[0]=he->h_addr_list[0][0];
536 ip[1]=he->h_addr_list[0][1];
537 ip[2]=he->h_addr_list[0][2];
538 ip[3]=he->h_addr_list[0][3];
539 }
540 return(1);
541 err:
542 return(0);
543 }
544
extract_port(char * str,short * port_ptr)545 int extract_port(char *str, short *port_ptr)
546 {
547 int i;
548 struct servent *s;
549
550 i=atoi(str);
551 if (i != 0)
552 *port_ptr=(unsigned short)i;
553 else
554 {
555 s=getservbyname(str,"tcp");
556 if (s == NULL)
557 {
558 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
559 return(0);
560 }
561 *port_ptr=ntohs((unsigned short)s->s_port);
562 }
563 return(1);
564 }
565
566 #define GHBN_NUM 4
567 static struct ghbn_cache_st
568 {
569 char name[128];
570 struct hostent ent;
571 unsigned long order;
572 } ghbn_cache[GHBN_NUM];
573
574 static unsigned long ghbn_hits=0L;
575 static unsigned long ghbn_miss=0L;
576
GetHostByName(char * name)577 static struct hostent *GetHostByName(char *name)
578 {
579 struct hostent *ret;
580 int i,lowi=0;
581 unsigned long low= (unsigned long)-1;
582
583 for (i=0; i<GHBN_NUM; i++)
584 {
585 if (low > ghbn_cache[i].order)
586 {
587 low=ghbn_cache[i].order;
588 lowi=i;
589 }
590 if (ghbn_cache[i].order > 0)
591 {
592 if (strncmp(name,ghbn_cache[i].name,128) == 0)
593 break;
594 }
595 }
596 if (i == GHBN_NUM) /* no hit*/
597 {
598 ghbn_miss++;
599 ret=gethostbyname(name);
600 if (ret == NULL) return(NULL);
601 /* else add to cache */
602 if(strlen(name) < sizeof ghbn_cache[0].name)
603 {
604 strcpy(ghbn_cache[lowi].name,name);
605 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
606 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
607 }
608 return(ret);
609 }
610 else
611 {
612 ghbn_hits++;
613 ret= &(ghbn_cache[i].ent);
614 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
615 return(ret);
616 }
617 }
618
619 #endif
620