Ignore auto-generated programs.
[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 #define USE_SOCKETS
65 #define NON_MAIN
66 #include "apps.h"
67 #undef USE_SOCKETS
68 #undef NON_MAIN
69 #include "s_apps.h"
70 #include "ssl.h"
71
72 #ifndef NOPROTO
73 static struct hostent *GetHostByName(char *name);
74 int sock_init(void );
75 #else
76 static struct hostent *GetHostByName();
77 int sock_init();
78 #endif
79
80 #ifdef WIN16
81 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
82 #else
83 #define SOCKET_PROTOCOL IPPROTO_TCP
84 #endif
85
86 #ifdef WINDOWS
87 static struct WSAData wsa_state;
88 static int wsa_init_done=0;
89
90 #ifdef WIN16
91 static HWND topWnd=0;
92 static FARPROC lpTopWndProc=NULL;
93 static FARPROC lpTopHookProc=NULL;
94 extern HINSTANCE _hInstance;  /* nice global CRT provides */
95
96 static LONG FAR PASCAL topHookProc(hwnd,message,wParam,lParam)
97 HWND hwnd;
98 UINT message;
99 WPARAM wParam;
100 LPARAM lParam;
101         {
102         if (hwnd == topWnd)
103                 {
104                 switch(message)
105                         {
106                 case WM_DESTROY:
107                 case WM_CLOSE:
108                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
109                         sock_cleanup();
110                         break;
111                         }
112                 }
113         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
114         }
115
116 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
117         {
118         topWnd=hwnd;
119         return(FALSE);
120         }
121
122 #endif /* WIN32 */
123 #endif /* WINDOWS */
124
125 void sock_cleanup()
126         {
127 #ifdef WINDOWS
128         if (wsa_init_done)
129                 {
130                 wsa_init_done=0;
131                 WSACancelBlockingCall();
132                 WSACleanup();
133                 }
134 #endif
135         }
136
137 int sock_init()
138         {
139 #ifdef WINDOWS
140         if (!wsa_init_done)
141                 {
142                 int err;
143           
144 #ifdef SIGINT
145                 signal(SIGINT,(void (*)(int))sock_cleanup);
146 #endif
147                 wsa_init_done=1;
148                 memset(&wsa_state,0,sizeof(wsa_state));
149                 if (WSAStartup(0x0101,&wsa_state)!=0)
150                         {
151                         err=WSAGetLastError();
152                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
153                         return(0);
154                         }
155
156 #ifdef WIN16
157                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
158                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
159                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
160
161                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
162 #endif /* WIN16 */
163                 }
164 #endif /* WINDOWS */
165         return(1);
166         }
167
168 int init_client(sock, host, port)
169 int *sock;
170 char *host;
171 int port;
172         {
173         unsigned char ip[4];
174         short p=0;
175
176         if (!host_ip(host,&(ip[0])))
177                 {
178                 return(0);
179                 }
180         if (p != 0) port=p;
181         return(init_client_ip(sock,ip,port));
182         }
183
184 int init_client_ip(sock, ip, port)
185 int *sock;
186 unsigned char ip[4];
187 int port;
188         {
189         unsigned long addr;
190         struct sockaddr_in them;
191         int s,i;
192
193         if (!sock_init()) return(0);
194
195         memset((char *)&them,0,sizeof(them));
196         them.sin_family=AF_INET;
197         them.sin_port=htons((unsigned short)port);
198         addr=(unsigned long)
199                 ((unsigned long)ip[0]<<24L)|
200                 ((unsigned long)ip[1]<<16L)|
201                 ((unsigned long)ip[2]<< 8L)|
202                 ((unsigned long)ip[3]);
203         them.sin_addr.s_addr=htonl(addr);
204
205         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
206         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
207
208         i=0;
209         i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
210         if (i < 0) { perror("keepalive"); return(0); }
211
212         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
213                 { close(s); perror("connect"); return(0); }
214         *sock=s;
215         return(1);
216         }
217
218 int nbio_sock_error(sock)
219 int sock;
220         {
221         int j,i,size;
222
223         size=sizeof(int);
224         i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,&size);
225         if (i < 0)
226                 return(1);
227         else
228                 return(j);
229         }
230
231 int nbio_init_client_ip(sock, ip, port)
232 int *sock;
233 unsigned char ip[4];
234 int port;
235         {
236         unsigned long addr;
237         struct sockaddr_in them;
238         int s,i;
239
240         if (!sock_init()) return(0);
241
242         memset((char *)&them,0,sizeof(them));
243         them.sin_family=AF_INET;
244         them.sin_port=htons((unsigned short)port);
245         addr=   (unsigned long)
246                 ((unsigned long)ip[0]<<24L)|
247                 ((unsigned long)ip[1]<<16L)|
248                 ((unsigned long)ip[2]<< 8L)|
249                 ((unsigned long)ip[3]);
250         them.sin_addr.s_addr=htonl(addr);
251
252         if (*sock <= 0)
253                 {
254                 unsigned long l=1;
255
256                 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
257                 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
258
259                 i=0;
260                 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
261                 if (i < 0) { perror("keepalive"); return(0); }
262                 *sock=s;
263
264 #ifdef FIONBIO
265                 BIO_socket_ioctl(s,FIONBIO,&l);
266 #endif
267                 }
268         else
269                 s= *sock;
270
271         i=connect(s,(struct sockaddr *)&them,sizeof(them));
272         if (i == INVALID_SOCKET)
273                 {
274                 if (BIO_sock_should_retry(i))
275                         return(-1);
276                 else
277                         return(0);
278                 }
279         else
280                 return(1);
281         }
282
283 int do_server(port, ret, cb)
284 int port;
285 int *ret;
286 int (*cb)();
287         {
288         int sock;
289         char *name;
290         int accept_socket;
291         int i;
292
293         if (!init_server(&accept_socket,port)) return(0);
294
295         if (ret != NULL)
296                 {
297                 *ret=accept_socket;
298                 /* return(1);*/
299                 }
300         for (;;)
301                 {
302                 if (do_accept(accept_socket,&sock,&name) == 0)
303                         {
304                         SHUTDOWN(accept_socket);
305                         return(0);
306                         }
307                 i=(*cb)(name,sock);
308                 if (name != NULL) Free(name);
309                 SHUTDOWN2(sock);
310                 if (i < 0)
311                         {
312                         SHUTDOWN2(accept_socket);
313                         return(i);
314                         }
315                 }
316         }
317
318 int init_server_long(sock, port, ip)
319 int *sock;
320 int port;
321 char *ip;
322         {
323         int ret=0;
324         struct sockaddr_in server;
325         int s= -1,i;
326
327         if (!sock_init()) return(0);
328
329         memset((char *)&server,0,sizeof(server));
330         server.sin_family=AF_INET;
331         server.sin_port=htons((unsigned short)port);
332         if (ip == NULL)
333                 server.sin_addr.s_addr=INADDR_ANY;
334         else
335 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
336 #ifndef BIT_FIELD_LIMITS
337                 memcpy(&server.sin_addr.s_addr,ip,4);
338 #else
339                 memcpy(&server.sin_addr,ip,4);
340 #endif
341         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
342
343         if (s == INVALID_SOCKET) goto err;
344         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
345                 {
346 #ifndef WINDOWS
347                 perror("bind");
348 #endif
349                 goto err;
350                 }
351         /* Make it 128 for linux */
352         if (listen(s,128) == -1) goto err;
353         i=0;
354         *sock=s;
355         ret=1;
356 err:
357         if ((ret == 0) && (s != -1))
358                 {
359                 SHUTDOWN(s);
360                 }
361         return(ret);
362         }
363
364 int init_server(sock,port)
365 int *sock;
366 int port;
367         {
368         return(init_server_long(sock, port, NULL));
369         }
370
371 int do_accept(acc_sock, sock, host)
372 int acc_sock;
373 int *sock;
374 char **host;
375         {
376         int ret,i;
377         struct hostent *h1,*h2;
378         static struct sockaddr_in from;
379         int len;
380 /*      struct linger ling; */
381
382         if (!sock_init()) return(0);
383
384 #ifndef WINDOWS
385 redoit:
386 #endif
387
388         memset((char *)&from,0,sizeof(from));
389         len=sizeof(from);
390         ret=accept(acc_sock,(struct sockaddr *)&from,&len);
391         if (ret == INVALID_SOCKET)
392                 {
393 #ifdef WINDOWS
394                 i=WSAGetLastError();
395                 BIO_printf(bio_err,"accept error %d\n",i);
396 #else
397                 if (errno == EINTR)
398                         {
399                         /*check_timeout(); */
400                         goto redoit;
401                         }
402                 fprintf(stderr,"errno=%d ",errno);
403                 perror("accept");
404 #endif
405                 return(0);
406                 }
407
408 /*
409         ling.l_onoff=1;
410         ling.l_linger=0;
411         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
412         if (i < 0) { perror("linger"); return(0); }
413         i=0;
414         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
415         if (i < 0) { perror("keepalive"); return(0); }
416 */
417
418         if (host == NULL) goto end;
419 #ifndef BIT_FIELD_LIMITS
420         /* I should use WSAAsyncGetHostByName() under windows */
421         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
422                 sizeof(from.sin_addr.s_addr),AF_INET);
423 #else
424         h1=gethostbyaddr((char *)&from.sin_addr,
425                 sizeof(struct in_addr),AF_INET);
426 #endif
427         if (h1 == NULL)
428                 {
429                 BIO_printf(bio_err,"bad gethostbyaddr\n");
430                 *host=NULL;
431                 /* return(0); */
432                 }
433         else
434                 {
435                 if ((*host=(char *)Malloc(strlen(h1->h_name)+1)) == NULL)
436                         {
437                         perror("Malloc");
438                         return(0);
439                         }
440                 strcpy(*host,h1->h_name);
441
442                 h2=GetHostByName(*host);
443                 if (h2 == NULL)
444                         {
445                         BIO_printf(bio_err,"gethostbyname failure\n");
446                         return(0);
447                         }
448                 i=0;
449                 if (h2->h_addrtype != AF_INET)
450                         {
451                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
452                         return(0);
453                         }
454                 }
455 end:
456         *sock=ret;
457         return(1);
458         }
459
460 int extract_host_port(str,host_ptr,ip,port_ptr)
461 char *str;
462 char **host_ptr;
463 unsigned char *ip;
464 short *port_ptr;
465         {
466         char *h,*p;
467
468         h=str;
469         p=strchr(str,':');
470         if (p == NULL)
471                 {
472                 BIO_printf(bio_err,"no port defined\n");
473                 return(0);
474                 }
475         *(p++)='\0';
476
477         if ((ip != NULL) && !host_ip(str,ip))
478                 goto err;
479         if (host_ptr != NULL) *host_ptr=h;
480
481         if (!extract_port(p,port_ptr))
482                 goto err;
483         return(1);
484 err:
485         return(0);
486         }
487
488 int host_ip(str,ip)
489 char *str;
490 unsigned char ip[4];
491         {
492         unsigned int in[4]; 
493         int i;
494
495         if (sscanf(str,"%d.%d.%d.%d",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
496                 {
497                 for (i=0; i<4; i++)
498                         if (in[i] > 255)
499                                 {
500                                 BIO_printf(bio_err,"invalid IP address\n");
501                                 goto err;
502                                 }
503                 ip[0]=in[0];
504                 ip[1]=in[1];
505                 ip[2]=in[2];
506                 ip[3]=in[3];
507                 }
508         else
509                 { /* do a gethostbyname */
510                 struct hostent *he;
511
512                 if (!sock_init()) return(0);
513
514                 he=GetHostByName(str);
515                 if (he == NULL)
516                         {
517                         BIO_printf(bio_err,"gethostbyname failure\n");
518                         goto err;
519                         }
520                 /* cast to short because of win16 winsock definition */
521                 if ((short)he->h_addrtype != AF_INET)
522                         {
523                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
524                         return(0);
525                         }
526                 ip[0]=he->h_addr_list[0][0];
527                 ip[1]=he->h_addr_list[0][1];
528                 ip[2]=he->h_addr_list[0][2];
529                 ip[3]=he->h_addr_list[0][3];
530                 }
531         return(1);
532 err:
533         return(0);
534         }
535
536 int extract_port(str,port_ptr)
537 char *str;
538 short *port_ptr;
539         {
540         int i;
541         struct servent *s;
542
543         i=atoi(str);
544         if (i != 0)
545                 *port_ptr=(unsigned short)i;
546         else
547                 {
548                 s=getservbyname(str,"tcp");
549                 if (s == NULL)
550                         {
551                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
552                         return(0);
553                         }
554                 *port_ptr=ntohs((unsigned short)s->s_port);
555                 }
556         return(1);
557         }
558
559 #define GHBN_NUM        4
560 static struct ghbn_cache_st
561         {
562         char name[128];
563         struct hostent ent;
564         unsigned long order;
565         } ghbn_cache[GHBN_NUM];
566
567 static unsigned long ghbn_hits=0L;
568 static unsigned long ghbn_miss=0L;
569
570 static struct hostent *GetHostByName(name)
571 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(argc, argv, in, out)
612 int argc;
613 char **argv;
614 int *in;
615 int *out;
616         {
617         int pid;
618 #define CHILD_READ      p1[0]
619 #define CHILD_WRITE     p2[1]
620 #define PARENT_READ     p2[0]
621 #define PARENT_WRITE    p1[1]
622         int p1[2],p2[2];
623
624         if ((pipe(p1) < 0) || (pipe(p2) < 0)) return(-1);
625
626         if ((pid=fork()) == 0)
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