VMS updates.
[openssl.git] / apps / s_socket.c
1 /* apps/s_socket.c */
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(VMS) && defined(__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 VMS
83 #if (__VMS_VER < 70000000) /* FIONBIO used as a switch to enable ioctl,
84                               and that isn't in VMS < 7.0 */
85 #undef FIONBIO
86 #endif
87 #include <processes.h> /* for vfork() */
88 #endif
89
90 static struct hostent *GetHostByName(char *name);
91 int sock_init(void );
92 #ifdef WIN16
93 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
94 #else
95 #define SOCKET_PROTOCOL IPPROTO_TCP
96 #endif
97
98 #ifdef WINDOWS
99 static struct WSAData wsa_state;
100 static int wsa_init_done=0;
101
102 #ifdef WIN16
103 static HWND topWnd=0;
104 static FARPROC lpTopWndProc=NULL;
105 static FARPROC lpTopHookProc=NULL;
106 extern HINSTANCE _hInstance;  /* nice global CRT provides */
107
108 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
109              LPARAM lParam)
110         {
111         if (hwnd == topWnd)
112                 {
113                 switch(message)
114                         {
115                 case WM_DESTROY:
116                 case WM_CLOSE:
117                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
118                         sock_cleanup();
119                         break;
120                         }
121                 }
122         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
123         }
124
125 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
126         {
127         topWnd=hwnd;
128         return(FALSE);
129         }
130
131 #endif /* WIN32 */
132 #endif /* WINDOWS */
133
134 void sock_cleanup(void)
135         {
136 #ifdef WINDOWS
137         if (wsa_init_done)
138                 {
139                 wsa_init_done=0;
140                 WSACancelBlockingCall();
141                 WSACleanup();
142                 }
143 #endif
144         }
145
146 int sock_init(void)
147         {
148 #ifdef WINDOWS
149         if (!wsa_init_done)
150                 {
151                 int err;
152           
153 #ifdef SIGINT
154                 signal(SIGINT,(void (*)(int))sock_cleanup);
155 #endif
156                 wsa_init_done=1;
157                 memset(&wsa_state,0,sizeof(wsa_state));
158                 if (WSAStartup(0x0101,&wsa_state)!=0)
159                         {
160                         err=WSAGetLastError();
161                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
162                         return(0);
163                         }
164
165 #ifdef WIN16
166                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
167                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
168                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
169
170                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
171 #endif /* WIN16 */
172                 }
173 #endif /* WINDOWS */
174         return(1);
175         }
176
177 int init_client(int *sock, char *host, int port)
178         {
179         unsigned char ip[4];
180         short p=0;
181
182         if (!host_ip(host,&(ip[0])))
183                 {
184                 return(0);
185                 }
186         if (p != 0) port=p;
187         return(init_client_ip(sock,ip,port));
188         }
189
190 int init_client_ip(int *sock, unsigned char ip[4], int port)
191         {
192         unsigned long addr;
193         struct sockaddr_in them;
194         int s,i;
195
196         if (!sock_init()) return(0);
197
198         memset((char *)&them,0,sizeof(them));
199         them.sin_family=AF_INET;
200         them.sin_port=htons((unsigned short)port);
201         addr=(unsigned long)
202                 ((unsigned long)ip[0]<<24L)|
203                 ((unsigned long)ip[1]<<16L)|
204                 ((unsigned long)ip[2]<< 8L)|
205                 ((unsigned long)ip[3]);
206         them.sin_addr.s_addr=htonl(addr);
207
208         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
209         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
210
211         i=0;
212         i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
213         if (i < 0) { perror("keepalive"); return(0); }
214
215         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
216                 { close(s); perror("connect"); return(0); }
217         *sock=s;
218         return(1);
219         }
220
221 int nbio_sock_error(int sock)
222         {
223         int j,i;
224         int size;
225
226         size=sizeof(int);
227         /* Note: under VMS with SOCKETSHR the third parameter is currently
228          * of type (int *) whereas under other systems it is (void *) if
229          * you don't have a cast it will choke the compiler: if you do
230          * have a cast then you can either go for (int *) or (void *).
231          */
232         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,(void *)&size);
233         if (i < 0)
234                 return(1);
235         else
236                 return(j);
237         }
238
239 int nbio_init_client_ip(int *sock, unsigned char ip[4], int port)
240         {
241         unsigned long addr;
242         struct sockaddr_in them;
243         int s,i;
244
245         if (!sock_init()) return(0);
246
247         memset((char *)&them,0,sizeof(them));
248         them.sin_family=AF_INET;
249         them.sin_port=htons((unsigned short)port);
250         addr=   (unsigned long)
251                 ((unsigned long)ip[0]<<24L)|
252                 ((unsigned long)ip[1]<<16L)|
253                 ((unsigned long)ip[2]<< 8L)|
254                 ((unsigned long)ip[3]);
255         them.sin_addr.s_addr=htonl(addr);
256
257         if (*sock <= 0)
258                 {
259 #ifdef FIONBIO
260                 unsigned long l=1;
261 #endif
262
263                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
264                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
265
266                 i=0;
267                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
268                 if (i < 0) { perror("keepalive"); return(0); }
269                 *sock=s;
270
271 #ifdef FIONBIO
272                 BIO_socket_ioctl(s,FIONBIO,&l);
273 #endif
274                 }
275         else
276                 s= *sock;
277
278         i=connect(s,(struct sockaddr *)&them,sizeof(them));
279         if (i == INVALID_SOCKET)
280                 {
281                 if (BIO_sock_should_retry(i))
282                         return(-1);
283                 else
284                         return(0);
285                 }
286         else
287                 return(1);
288         }
289
290 int do_server(int port, int *ret, int (*cb)(), char *context)
291         {
292         int sock;
293         char *name;
294         int accept_socket;
295         int i;
296
297         if (!init_server(&accept_socket,port)) return(0);
298
299         if (ret != NULL)
300                 {
301                 *ret=accept_socket;
302                 /* return(1);*/
303                 }
304         for (;;)
305                 {
306                 if (do_accept(accept_socket,&sock,&name) == 0)
307                         {
308                         SHUTDOWN(accept_socket);
309                         return(0);
310                         }
311                 i=(*cb)(name,sock, context);
312                 if (name != NULL) Free(name);
313                 SHUTDOWN2(sock);
314                 if (i < 0)
315                         {
316                         SHUTDOWN2(accept_socket);
317                         return(i);
318                         }
319                 }
320         }
321
322 int init_server_long(int *sock, int port, char *ip)
323         {
324         int ret=0;
325         struct sockaddr_in server;
326         int s= -1,i;
327
328         if (!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         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
343
344         if (s == INVALID_SOCKET) goto err;
345 #if defined SOL_SOCKET && defined SO_REUSEADDR
346                 {
347                 int j = 1;
348                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
349                            (void *) &j, sizeof j);
350                 }
351 #endif
352         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
353                 {
354 #ifndef WINDOWS
355                 perror("bind");
356 #endif
357                 goto err;
358                 }
359         /* Make it 128 for linux */
360         if (listen(s,128) == -1) goto err;
361         i=0;
362         *sock=s;
363         ret=1;
364 err:
365         if ((ret == 0) && (s != -1))
366                 {
367                 SHUTDOWN(s);
368                 }
369         return(ret);
370         }
371
372 int init_server(int *sock, int port)
373         {
374         return(init_server_long(sock, port, NULL));
375         }
376
377 int do_accept(int acc_sock, int *sock, char **host)
378         {
379         int ret,i;
380         struct hostent *h1,*h2;
381         static struct sockaddr_in from;
382         int len;
383 /*      struct linger ling; */
384
385         if (!sock_init()) return(0);
386
387 #ifndef WINDOWS
388 redoit:
389 #endif
390
391         memset((char *)&from,0,sizeof(from));
392         len=sizeof(from);
393         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
394          * of type (int *) whereas under other systems it is (void *) if
395          * you don't have a cast it will choke the compiler: if you do
396          * have a cast then you can either go for (int *) or (void *).
397          */
398         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
399         if (ret == INVALID_SOCKET)
400                 {
401 #ifdef WINDOWS
402                 i=WSAGetLastError();
403                 BIO_printf(bio_err,"accept error %d\n",i);
404 #else
405                 if (errno == EINTR)
406                         {
407                         /*check_timeout(); */
408                         goto redoit;
409                         }
410                 fprintf(stderr,"errno=%d ",errno);
411                 perror("accept");
412 #endif
413                 return(0);
414                 }
415
416 /*
417         ling.l_onoff=1;
418         ling.l_linger=0;
419         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
420         if (i < 0) { perror("linger"); return(0); }
421         i=0;
422         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
423         if (i < 0) { perror("keepalive"); return(0); }
424 */
425
426         if (host == NULL) goto end;
427 #ifndef BIT_FIELD_LIMITS
428         /* I should use WSAAsyncGetHostByName() under windows */
429         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
430                 sizeof(from.sin_addr.s_addr),AF_INET);
431 #else
432         h1=gethostbyaddr((char *)&from.sin_addr,
433                 sizeof(struct in_addr),AF_INET);
434 #endif
435         if (h1 == NULL)
436                 {
437                 BIO_printf(bio_err,"bad gethostbyaddr\n");
438                 *host=NULL;
439                 /* return(0); */
440                 }
441         else
442                 {
443                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
444                         {
445                         perror("Malloc");
446                         return(0);
447                         }
448                 strcpy(*host,h1->h_name);
449
450                 h2=GetHostByName(*host);
451                 if (h2 == NULL)
452                         {
453                         BIO_printf(bio_err,"gethostbyname failure\n");
454                         return(0);
455                         }
456                 i=0;
457                 if (h2->h_addrtype != AF_INET)
458                         {
459                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
460                         return(0);
461                         }
462                 }
463 end:
464         *sock=ret;
465         return(1);
466         }
467
468 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
469              short *port_ptr)
470         {
471         char *h,*p;
472
473         h=str;
474         p=strchr(str,':');
475         if (p == NULL)
476                 {
477                 BIO_printf(bio_err,"no port defined\n");
478                 return(0);
479                 }
480         *(p++)='\0';
481
482         if ((ip != NULL) && !host_ip(str,ip))
483                 goto err;
484         if (host_ptr != NULL) *host_ptr=h;
485
486         if (!extract_port(p,port_ptr))
487                 goto err;
488         return(1);
489 err:
490         return(0);
491         }
492
493 int host_ip(char *str, unsigned char ip[4])
494         {
495         unsigned int in[4]; 
496         int i;
497
498         if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
499                 {
500                 for (i=0; i<4; i++)
501                         if (in[i] > 255)
502                                 {
503                                 BIO_printf(bio_err,"invalid IP address\n");
504                                 goto err;
505                                 }
506                 ip[0]=in[0];
507                 ip[1]=in[1];
508                 ip[2]=in[2];
509                 ip[3]=in[3];
510                 }
511         else
512                 { /* do a gethostbyname */
513                 struct hostent *he;
514
515                 if (!sock_init()) return(0);
516
517                 he=GetHostByName(str);
518                 if (he == NULL)
519                         {
520                         BIO_printf(bio_err,"gethostbyname failure\n");
521                         goto err;
522                         }
523                 /* cast to short because of win16 winsock definition */
524                 if ((short)he->h_addrtype != AF_INET)
525                         {
526                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
527                         return(0);
528                         }
529                 ip[0]=he->h_addr_list[0][0];
530                 ip[1]=he->h_addr_list[0][1];
531                 ip[2]=he->h_addr_list[0][2];
532                 ip[3]=he->h_addr_list[0][3];
533                 }
534         return(1);
535 err:
536         return(0);
537         }
538
539 int extract_port(char *str, short *port_ptr)
540         {
541         int i;
542         struct servent *s;
543
544         i=atoi(str);
545         if (i != 0)
546                 *port_ptr=(unsigned short)i;
547         else
548                 {
549                 s=getservbyname(str,"tcp");
550                 if (s == NULL)
551                         {
552                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
553                         return(0);
554                         }
555                 *port_ptr=ntohs((unsigned short)s->s_port);
556                 }
557         return(1);
558         }
559
560 #define GHBN_NUM        4
561 static struct ghbn_cache_st
562         {
563         char name[128];
564         struct hostent ent;
565         unsigned long order;
566         } ghbn_cache[GHBN_NUM];
567
568 static unsigned long ghbn_hits=0L;
569 static unsigned long ghbn_miss=0L;
570
571 static struct hostent *GetHostByName(char *name)
572         {
573         struct hostent *ret;
574         int i,lowi=0;
575         unsigned long low= (unsigned long)-1;
576
577         for (i=0; i<GHBN_NUM; i++)
578                 {
579                 if (low > ghbn_cache[i].order)
580                         {
581                         low=ghbn_cache[i].order;
582                         lowi=i;
583                         }
584                 if (ghbn_cache[i].order > 0)
585                         {
586                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
587                                 break;
588                         }
589                 }
590         if (i == GHBN_NUM) /* no hit*/
591                 {
592                 ghbn_miss++;
593                 ret=gethostbyname(name);
594                 if (ret == NULL) return(NULL);
595                 /* else add to cache */
596                 strncpy(ghbn_cache[lowi].name,name,128);
597                 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
598                 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
599                 return(ret);
600                 }
601         else
602                 {
603                 ghbn_hits++;
604                 ret= &(ghbn_cache[i].ent);
605                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
606                 return(ret);
607                 }
608         }
609
610 #ifndef MSDOS
611 int spawn(int argc, char **argv, int *in, int *out)
612         {
613         int pid;
614 #define CHILD_READ      p1[0]
615 #define CHILD_WRITE     p2[1]
616 #define PARENT_READ     p2[0]
617 #define PARENT_WRITE    p1[1]
618         int p1[2],p2[2];
619
620         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
621
622 #ifdef VMS
623         if ((pid=vfork()) == 0)
624 #else
625         if ((pid=fork()) == 0)
626 #endif
627                 { /* child */
628                 if (dup2(CHILD_WRITE,fileno(stdout)) < 0)
629                         perror("dup2");
630                 if (dup2(CHILD_WRITE,fileno(stderr)) < 0)
631                         perror("dup2");
632                 if (dup2(CHILD_READ,fileno(stdin)) < 0)
633                         perror("dup2");
634                 close(CHILD_READ); 
635                 close(CHILD_WRITE);
636
637                 close(PARENT_READ);
638                 close(PARENT_WRITE);
639                 execvp(argv[0],argv);
640                 perror("child");
641                 exit(1);
642                 }
643
644         /* parent */
645         *in= PARENT_READ;
646         *out=PARENT_WRITE;
647         close(CHILD_READ);
648         close(CHILD_WRITE);
649         return(pid);
650         }
651 #endif /* MSDOS */
652
653
654 #ifdef undef
655         /* Turn on synchronous sockets so that we can do a WaitForMultipleObjects
656          * on sockets */
657         {
658         SOCKET s;
659         int optionValue = SO_SYNCHRONOUS_NONALERT;
660         int err;
661
662         err = setsockopt( 
663             INVALID_SOCKET, 
664             SOL_SOCKET, 
665             SO_OPENTYPE, 
666             (char *)&optionValue, 
667             sizeof(optionValue));
668         if (err != NO_ERROR) {
669         /* failed for some reason... */
670                 BIO_printf(bio_err, "failed to setsockopt(SO_OPENTYPE, SO_SYNCHRONOUS_ALERT) - %d\n",
671                         WSAGetLastError());
672                 }
673         }
674 #endif