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)
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.
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).
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.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
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)"
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
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.]
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)
71 typedef unsigned int u_int;
80 #include <openssl/ssl.h>
88 #ifndef OPENSSL_NO_SOCK
90 static struct hostent *GetHostByName(char *name);
91 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
92 static void ssl_sock_cleanup(void);
94 static int ssl_sock_init(void);
95 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
96 static int init_server(int *sock, int port, int type);
97 static int init_server_long(int *sock, int port,char *ip, int type);
98 static int do_accept(int acc_sock, int *sock, char **host);
99 static int host_ip(char *str, unsigned char ip[4]);
101 #ifdef OPENSSL_SYS_WIN16
102 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
104 #define SOCKET_PROTOCOL IPPROTO_TCP
107 #ifdef OPENSSL_SYS_NETWARE
108 static int wsa_init_done=0;
111 #ifdef OPENSSL_SYS_WINDOWS
112 static struct WSAData wsa_state;
113 static int wsa_init_done=0;
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 */
121 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
130 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
135 return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
138 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
144 #endif /* OPENSSL_SYS_WIN32 */
145 #endif /* OPENSSL_SYS_WINDOWS */
147 #ifdef OPENSSL_SYS_WINDOWS
148 static void ssl_sock_cleanup(void)
153 #ifndef OPENSSL_SYS_WINCE
154 WSACancelBlockingCall();
159 #elif defined(OPENSSL_SYS_NETWARE)
160 static void sock_cleanup(void)
170 static int ssl_sock_init(void)
173 extern int _watt_do_exit;
177 #elif defined(OPENSSL_SYS_WINDOWS)
183 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
186 memset(&wsa_state,0,sizeof(wsa_state));
187 if (WSAStartup(0x0101,&wsa_state)!=0)
189 err=WSAGetLastError();
190 BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
194 #ifdef OPENSSL_SYS_WIN16
195 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
196 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
197 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
199 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
200 #endif /* OPENSSL_SYS_WIN16 */
202 #elif defined(OPENSSL_SYS_NETWARE)
211 signal(SIGINT,(void (*)(int))sock_cleanup);
215 wVerReq = MAKEWORD( 2, 0 );
216 err = WSAStartup(wVerReq,&wsaData);
219 BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
223 #endif /* OPENSSL_SYS_WINDOWS */
227 int init_client(int *sock, char *host, int port, int type)
232 if (!host_ip(host,&(ip[0])))
237 return(init_client_ip(sock,ip,port,type));
240 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
243 struct sockaddr_in them;
246 if (!ssl_sock_init()) return(0);
248 memset((char *)&them,0,sizeof(them));
249 them.sin_family=AF_INET;
250 them.sin_port=htons((unsigned short)port);
252 ((unsigned long)ip[0]<<24L)|
253 ((unsigned long)ip[1]<<16L)|
254 ((unsigned long)ip[2]<< 8L)|
255 ((unsigned long)ip[3]);
256 them.sin_addr.s_addr=htonl(addr);
258 if (type == SOCK_STREAM)
259 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
260 else /* ( type == SOCK_DGRAM) */
261 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
263 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
265 #ifndef OPENSSL_SYS_MPE
266 if (type == SOCK_STREAM)
269 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
270 if (i < 0) { perror("keepalive"); return(0); }
274 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
275 { close(s); perror("connect"); return(0); }
280 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
287 if (!init_server(&accept_socket,port,type)) return(0);
296 if (type==SOCK_STREAM)
298 if (do_accept(accept_socket,&sock,&name) == 0)
300 SHUTDOWN(accept_socket);
305 sock = accept_socket;
306 i=(*cb)(name,sock, context);
307 if (name != NULL) OPENSSL_free(name);
308 if (type==SOCK_STREAM)
312 SHUTDOWN2(accept_socket);
318 static int init_server_long(int *sock, int port, char *ip, int type)
321 struct sockaddr_in server;
324 if (!ssl_sock_init()) return(0);
326 memset((char *)&server,0,sizeof(server));
327 server.sin_family=AF_INET;
328 server.sin_port=htons((unsigned short)port);
330 server.sin_addr.s_addr=INADDR_ANY;
332 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
333 #ifndef BIT_FIELD_LIMITS
334 memcpy(&server.sin_addr.s_addr,ip,4);
336 memcpy(&server.sin_addr,ip,4);
339 if (type == SOCK_STREAM)
340 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
341 else /* type == SOCK_DGRAM */
342 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
344 if (s == INVALID_SOCKET) goto err;
345 #if defined SOL_SOCKET && defined SO_REUSEADDR
348 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
349 (void *) &j, sizeof j);
352 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
354 #ifndef OPENSSL_SYS_WINDOWS
359 /* Make it 128 for linux */
360 if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
365 if ((ret == 0) && (s != -1))
372 static int init_server(int *sock, int port, int type)
374 return(init_server_long(sock, port, NULL, type));
377 static int do_accept(int acc_sock, int *sock, char **host)
380 struct hostent *h1,*h2;
381 static struct sockaddr_in from;
383 /* struct linger ling; */
385 if (!ssl_sock_init()) return(0);
387 #ifndef OPENSSL_SYS_WINDOWS
391 memset((char *)&from,0,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 *).
398 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
399 if (ret == INVALID_SOCKET)
401 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
403 BIO_printf(bio_err,"accept error %d\n",i);
407 /*check_timeout(); */
410 fprintf(stderr,"errno=%d ",errno);
419 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
420 if (i < 0) { perror("linger"); return(0); }
422 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
423 if (i < 0) { perror("keepalive"); return(0); }
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);
432 h1=gethostbyaddr((char *)&from.sin_addr,
433 sizeof(struct in_addr),AF_INET);
437 BIO_printf(bio_err,"bad gethostbyaddr\n");
443 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
445 perror("OPENSSL_malloc");
448 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
450 h2=GetHostByName(*host);
453 BIO_printf(bio_err,"gethostbyname failure\n");
457 if (h2->h_addrtype != AF_INET)
459 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
468 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
477 BIO_printf(bio_err,"no port defined\n");
482 if ((ip != NULL) && !host_ip(str,ip))
484 if (host_ptr != NULL) *host_ptr=h;
486 if (!extract_port(p,port_ptr))
493 static int host_ip(char *str, unsigned char ip[4])
498 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
503 BIO_printf(bio_err,"invalid IP address\n");
512 { /* do a gethostbyname */
515 if (!ssl_sock_init()) return(0);
517 he=GetHostByName(str);
520 BIO_printf(bio_err,"gethostbyname failure\n");
523 /* cast to short because of win16 winsock definition */
524 if ((short)he->h_addrtype != AF_INET)
526 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
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];
539 int extract_port(char *str, short *port_ptr)
546 *port_ptr=(unsigned short)i;
549 s=getservbyname(str,"tcp");
552 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
555 *port_ptr=ntohs((unsigned short)s->s_port);
561 static struct ghbn_cache_st
566 } ghbn_cache[GHBN_NUM];
568 static unsigned long ghbn_hits=0L;
569 static unsigned long ghbn_miss=0L;
571 static struct hostent *GetHostByName(char *name)
575 unsigned long low= (unsigned long)-1;
577 for (i=0; i<GHBN_NUM; i++)
579 if (low > ghbn_cache[i].order)
581 low=ghbn_cache[i].order;
584 if (ghbn_cache[i].order > 0)
586 if (strncmp(name,ghbn_cache[i].name,128) == 0)
590 if (i == GHBN_NUM) /* no hit*/
593 ret=gethostbyname(name);
594 if (ret == NULL) return(NULL);
595 /* else add to cache */
596 if(strlen(name) < sizeof ghbn_cache[0].name)
598 strcpy(ghbn_cache[lowi].name,name);
599 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
600 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
607 ret= &(ghbn_cache[i].ent);
608 ghbn_cache[i].order=ghbn_miss+ghbn_hits;