Import OpenSSL-1.0.0b.
[dragonfly.git] / crypto / openssl / apps / s_socket.c
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
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
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
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)
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
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
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
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
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
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
379 static int init_server(int *sock, int port, int type)
380         {
381         return(init_server_long(sock, port, NULL, type));
382         }
383
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
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
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
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
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