Netware-specific changes,
[openssl.git] / 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 /* 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(OPENSSL_SYS_VMS_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 FLAT_INC
83 #include "e_os.h"
84 #else
85 #include "../e_os.h"
86 #endif
87
88 #ifndef OPENSSL_NO_SOCK
89
90 static struct hostent *GetHostByName(char *name);
91 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
92 static void ssl_sock_cleanup(void);
93 #endif
94 static int ssl_sock_init(void);
95 static int init_client_ip(int *sock,unsigned char ip[4], int port);
96 static int init_server(int *sock, int port);
97 static int init_server_long(int *sock, int port,char *ip);
98 static int do_accept(int acc_sock, int *sock, char **host);
99 static int host_ip(char *str, unsigned char ip[4]);
100
101 #ifdef OPENSSL_SYS_WIN16
102 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
103 #else
104 #define SOCKET_PROTOCOL IPPROTO_TCP
105 #endif
106
107 #ifdef OPENSSL_SYS_NETWARE
108 static int wsa_init_done=0;
109 #endif
110
111 #ifdef OPENSSL_SYS_WINDOWS
112 static struct WSAData wsa_state;
113 static int wsa_init_done=0;
114
115 #ifdef OPENSSL_SYS_WIN16
116 static HWND topWnd=0;
117 static FARPROC lpTopWndProc=NULL;
118 static FARPROC lpTopHookProc=NULL;
119 extern HINSTANCE _hInstance;  /* nice global CRT provides */
120
121 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
122              LPARAM lParam)
123         {
124         if (hwnd == topWnd)
125                 {
126                 switch(message)
127                         {
128                 case WM_DESTROY:
129                 case WM_CLOSE:
130                         SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
131                         ssl_sock_cleanup();
132                         break;
133                         }
134                 }
135         return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
136         }
137
138 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
139         {
140         topWnd=hwnd;
141         return(FALSE);
142         }
143
144 #endif /* OPENSSL_SYS_WIN32 */
145 #endif /* OPENSSL_SYS_WINDOWS */
146
147 #ifdef OPENSSL_SYS_WINDOWS
148 static void ssl_sock_cleanup(void)
149         {
150         if (wsa_init_done)
151                 {
152                 wsa_init_done=0;
153 #ifndef OPENSSL_SYS_WINCE
154                 WSACancelBlockingCall();
155 #endif
156                 WSACleanup();
157                 }
158         }
159 #elif defined(OPENSSL_SYS_NETWARE)
160 static void sock_cleanup(void)
161     {
162     if (wsa_init_done)
163         {
164         wsa_init_done=0;
165                 WSACleanup();
166                 }
167         }
168 #endif
169
170 static int ssl_sock_init(void)
171         {
172 #ifdef WATT32
173         extern int _watt_do_exit;
174         _watt_do_exit = 0;
175         dbug_init();
176         if (sock_init())
177                 return (0);
178 #elif defined(OPENSSL_SYS_WINDOWS)
179         if (!wsa_init_done)
180                 {
181                 int err;
182           
183 #ifdef SIGINT
184                 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
185 #endif
186                 wsa_init_done=1;
187                 memset(&wsa_state,0,sizeof(wsa_state));
188                 if (WSAStartup(0x0101,&wsa_state)!=0)
189                         {
190                         err=WSAGetLastError();
191                         BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
192                         return(0);
193                         }
194
195 #ifdef OPENSSL_SYS_WIN16
196                 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
197                 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
198                 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
199
200                 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
201 #endif /* OPENSSL_SYS_WIN16 */
202                 }
203 #elif defined(OPENSSL_SYS_NETWARE)
204    WORD wVerReq;
205    WSADATA wsaData;
206    int err;
207
208    if (!wsa_init_done)
209       {
210    
211 # ifdef SIGINT
212       signal(SIGINT,(void (*)(int))sock_cleanup);
213 # endif
214
215       wsa_init_done=1;
216       wVerReq = MAKEWORD( 2, 0 );
217       err = WSAStartup(wVerReq,&wsaData);
218       if (err != 0)
219          {
220          BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
221          return(0);
222          }
223       }
224 #endif /* OPENSSL_SYS_WINDOWS */
225         return(1);
226         }
227
228 int init_client(int *sock, char *host, int port)
229         {
230         unsigned char ip[4];
231         short p=0;
232
233         if (!host_ip(host,&(ip[0])))
234                 {
235                 return(0);
236                 }
237         if (p != 0) port=p;
238         return(init_client_ip(sock,ip,port));
239         }
240
241 static int init_client_ip(int *sock, unsigned char ip[4], int port)
242         {
243         unsigned long addr;
244         struct sockaddr_in them;
245         int s,i;
246
247         if (!ssl_sock_init()) return(0);
248
249         memset((char *)&them,0,sizeof(them));
250         them.sin_family=AF_INET;
251         them.sin_port=htons((unsigned short)port);
252         addr=(unsigned long)
253                 ((unsigned long)ip[0]<<24L)|
254                 ((unsigned long)ip[1]<<16L)|
255                 ((unsigned long)ip[2]<< 8L)|
256                 ((unsigned long)ip[3]);
257         them.sin_addr.s_addr=htonl(addr);
258
259         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
260         if (s == INVALID_SOCKET) { perror("socket"); return(0); }
261
262 #ifndef OPENSSL_SYS_MPE
263         i=0;
264         i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
265         if (i < 0) { perror("keepalive"); return(0); }
266 #endif
267
268         if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
269                 { close(s); perror("connect"); return(0); }
270         *sock=s;
271         return(1);
272         }
273
274 int do_server(int port, int *ret, int (*cb)(), char *context)
275         {
276         int sock;
277         char *name;
278         int accept_socket;
279         int i;
280
281         if (!init_server(&accept_socket,port)) return(0);
282
283         if (ret != NULL)
284                 {
285                 *ret=accept_socket;
286                 /* return(1);*/
287                 }
288         for (;;)
289                 {
290                 if (do_accept(accept_socket,&sock,&name) == 0)
291                         {
292                         SHUTDOWN(accept_socket);
293                         return(0);
294                         }
295                 i=(*cb)(name,sock, context);
296                 if (name != NULL) OPENSSL_free(name);
297                 SHUTDOWN2(sock);
298                 if (i < 0)
299                         {
300                         SHUTDOWN2(accept_socket);
301                         return(i);
302                         }
303                 }
304         }
305
306 static int init_server_long(int *sock, int port, char *ip)
307         {
308         int ret=0;
309         struct sockaddr_in server;
310         int s= -1,i;
311
312         if (!ssl_sock_init()) return(0);
313
314         memset((char *)&server,0,sizeof(server));
315         server.sin_family=AF_INET;
316         server.sin_port=htons((unsigned short)port);
317         if (ip == NULL)
318                 server.sin_addr.s_addr=INADDR_ANY;
319         else
320 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
321 #ifndef BIT_FIELD_LIMITS
322                 memcpy(&server.sin_addr.s_addr,ip,4);
323 #else
324                 memcpy(&server.sin_addr,ip,4);
325 #endif
326         s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
327
328         if (s == INVALID_SOCKET) goto err;
329 #if defined SOL_SOCKET && defined SO_REUSEADDR
330                 {
331                 int j = 1;
332                 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
333                            (void *) &j, sizeof j);
334                 }
335 #endif
336         if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
337                 {
338 #ifndef OPENSSL_SYS_WINDOWS
339                 perror("bind");
340 #endif
341                 goto err;
342                 }
343         /* Make it 128 for linux */
344         if (listen(s,128) == -1) goto err;
345         i=0;
346         *sock=s;
347         ret=1;
348 err:
349         if ((ret == 0) && (s != -1))
350                 {
351                 SHUTDOWN(s);
352                 }
353         return(ret);
354         }
355
356 static int init_server(int *sock, int port)
357         {
358         return(init_server_long(sock, port, NULL));
359         }
360
361 static int do_accept(int acc_sock, int *sock, char **host)
362         {
363         int ret,i;
364         struct hostent *h1,*h2;
365         static struct sockaddr_in from;
366         int len;
367 /*      struct linger ling; */
368
369         if (!ssl_sock_init()) return(0);
370
371 #ifndef OPENSSL_SYS_WINDOWS
372 redoit:
373 #endif
374
375         memset((char *)&from,0,sizeof(from));
376         len=sizeof(from);
377         /* Note: under VMS with SOCKETSHR the fourth parameter is currently
378          * of type (int *) whereas under other systems it is (void *) if
379          * you don't have a cast it will choke the compiler: if you do
380          * have a cast then you can either go for (int *) or (void *).
381          */
382         ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
383         if (ret == INVALID_SOCKET)
384                 {
385 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
386                 i=WSAGetLastError();
387                 BIO_printf(bio_err,"accept error %d\n",i);
388 #else
389                 if (errno == EINTR)
390                         {
391                         /*check_timeout(); */
392                         goto redoit;
393                         }
394                 fprintf(stderr,"errno=%d ",errno);
395                 perror("accept");
396 #endif
397                 return(0);
398                 }
399
400 /*
401         ling.l_onoff=1;
402         ling.l_linger=0;
403         i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
404         if (i < 0) { perror("linger"); return(0); }
405         i=0;
406         i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
407         if (i < 0) { perror("keepalive"); return(0); }
408 */
409
410         if (host == NULL) goto end;
411 #ifndef BIT_FIELD_LIMITS
412         /* I should use WSAAsyncGetHostByName() under windows */
413         h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
414                 sizeof(from.sin_addr.s_addr),AF_INET);
415 #else
416         h1=gethostbyaddr((char *)&from.sin_addr,
417                 sizeof(struct in_addr),AF_INET);
418 #endif
419         if (h1 == NULL)
420                 {
421                 BIO_printf(bio_err,"bad gethostbyaddr\n");
422                 *host=NULL;
423                 /* return(0); */
424                 }
425         else
426                 {
427                 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
428                         {
429                         perror("OPENSSL_malloc");
430                         return(0);
431                         }
432                 strcpy(*host,h1->h_name);
433
434                 h2=GetHostByName(*host);
435                 if (h2 == NULL)
436                         {
437                         BIO_printf(bio_err,"gethostbyname failure\n");
438                         return(0);
439                         }
440                 i=0;
441                 if (h2->h_addrtype != AF_INET)
442                         {
443                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
444                         return(0);
445                         }
446                 }
447 end:
448         *sock=ret;
449         return(1);
450         }
451
452 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
453              short *port_ptr)
454         {
455         char *h,*p;
456
457         h=str;
458         p=strchr(str,':');
459         if (p == NULL)
460                 {
461                 BIO_printf(bio_err,"no port defined\n");
462                 return(0);
463                 }
464         *(p++)='\0';
465
466         if ((ip != NULL) && !host_ip(str,ip))
467                 goto err;
468         if (host_ptr != NULL) *host_ptr=h;
469
470         if (!extract_port(p,port_ptr))
471                 goto err;
472         return(1);
473 err:
474         return(0);
475         }
476
477 static int host_ip(char *str, unsigned char ip[4])
478         {
479         unsigned int in[4]; 
480         int i;
481
482         if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
483                 {
484                 for (i=0; i<4; i++)
485                         if (in[i] > 255)
486                                 {
487                                 BIO_printf(bio_err,"invalid IP address\n");
488                                 goto err;
489                                 }
490                 ip[0]=in[0];
491                 ip[1]=in[1];
492                 ip[2]=in[2];
493                 ip[3]=in[3];
494                 }
495         else
496                 { /* do a gethostbyname */
497                 struct hostent *he;
498
499                 if (!ssl_sock_init()) return(0);
500
501                 he=GetHostByName(str);
502                 if (he == NULL)
503                         {
504                         BIO_printf(bio_err,"gethostbyname failure\n");
505                         goto err;
506                         }
507                 /* cast to short because of win16 winsock definition */
508                 if ((short)he->h_addrtype != AF_INET)
509                         {
510                         BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
511                         return(0);
512                         }
513                 ip[0]=he->h_addr_list[0][0];
514                 ip[1]=he->h_addr_list[0][1];
515                 ip[2]=he->h_addr_list[0][2];
516                 ip[3]=he->h_addr_list[0][3];
517                 }
518         return(1);
519 err:
520         return(0);
521         }
522
523 int extract_port(char *str, short *port_ptr)
524         {
525         int i;
526         struct servent *s;
527
528         i=atoi(str);
529         if (i != 0)
530                 *port_ptr=(unsigned short)i;
531         else
532                 {
533                 s=getservbyname(str,"tcp");
534                 if (s == NULL)
535                         {
536                         BIO_printf(bio_err,"getservbyname failure for %s\n",str);
537                         return(0);
538                         }
539                 *port_ptr=ntohs((unsigned short)s->s_port);
540                 }
541         return(1);
542         }
543
544 #define GHBN_NUM        4
545 static struct ghbn_cache_st
546         {
547         char name[128];
548         struct hostent ent;
549         unsigned long order;
550         } ghbn_cache[GHBN_NUM];
551
552 static unsigned long ghbn_hits=0L;
553 static unsigned long ghbn_miss=0L;
554
555 static struct hostent *GetHostByName(char *name)
556         {
557         struct hostent *ret;
558         int i,lowi=0;
559         unsigned long low= (unsigned long)-1;
560
561         for (i=0; i<GHBN_NUM; i++)
562                 {
563                 if (low > ghbn_cache[i].order)
564                         {
565                         low=ghbn_cache[i].order;
566                         lowi=i;
567                         }
568                 if (ghbn_cache[i].order > 0)
569                         {
570                         if (strncmp(name,ghbn_cache[i].name,128) == 0)
571                                 break;
572                         }
573                 }
574         if (i == GHBN_NUM) /* no hit*/
575                 {
576                 ghbn_miss++;
577                 ret=gethostbyname(name);
578                 if (ret == NULL) return(NULL);
579                 /* else add to cache */
580                 if(strlen(name) < sizeof ghbn_cache[0].name)
581                         {
582                         strcpy(ghbn_cache[lowi].name,name);
583                         memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
584                         ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
585                         }
586                 return(ret);
587                 }
588         else
589                 {
590                 ghbn_hits++;
591                 ret= &(ghbn_cache[i].ent);
592                 ghbn_cache[i].order=ghbn_miss+ghbn_hits;
593                 return(ret);
594                 }
595         }
596
597 #endif