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);
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]);
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)
232 if (!host_ip(host,&(ip[0])))
237 return(init_client_ip(sock,ip,port));
240 static int init_client_ip(int *sock, unsigned char ip[4], int port)
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 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
259 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
261 #ifndef OPENSSL_SYS_MPE
263 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
264 if (i < 0) { perror("keepalive"); return(0); }
267 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
268 { close(s); perror("connect"); return(0); }
273 int do_server(int port, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), char *context)
280 if (!init_server(&accept_socket,port)) return(0);
289 if (do_accept(accept_socket,&sock,&name) == 0)
291 SHUTDOWN(accept_socket);
294 i=(*cb)(name,sock, (unsigned char *)context);
295 if (name != NULL) OPENSSL_free(name);
299 SHUTDOWN2(accept_socket);
305 static int init_server_long(int *sock, int port, char *ip)
308 struct sockaddr_in server;
311 if (!ssl_sock_init()) return(0);
313 memset((char *)&server,0,sizeof(server));
314 server.sin_family=AF_INET;
315 server.sin_port=htons((unsigned short)port);
317 server.sin_addr.s_addr=INADDR_ANY;
319 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
320 #ifndef BIT_FIELD_LIMITS
321 memcpy(&server.sin_addr.s_addr,ip,4);
323 memcpy(&server.sin_addr,ip,4);
325 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
327 if (s == INVALID_SOCKET) goto err;
328 #if defined SOL_SOCKET && defined SO_REUSEADDR
331 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
332 (void *) &j, sizeof j);
335 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
337 #ifndef OPENSSL_SYS_WINDOWS
342 /* Make it 128 for linux */
343 if (listen(s,128) == -1) goto err;
348 if ((ret == 0) && (s != -1))
355 static int init_server(int *sock, int port)
357 return(init_server_long(sock, port, NULL));
360 static int do_accept(int acc_sock, int *sock, char **host)
363 struct hostent *h1,*h2;
364 static struct sockaddr_in from;
366 /* struct linger ling; */
368 if (!ssl_sock_init()) return(0);
370 #ifndef OPENSSL_SYS_WINDOWS
374 memset((char *)&from,0,sizeof(from));
376 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
377 * of type (int *) whereas under other systems it is (void *) if
378 * you don't have a cast it will choke the compiler: if you do
379 * have a cast then you can either go for (int *) or (void *).
381 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
382 if (ret == INVALID_SOCKET)
384 #if defined(OPENSSL_SYS_WINDOWS) || defined(OPENSSL_SYS_NETWARE)
386 BIO_printf(bio_err,"accept error %d\n",i);
390 /*check_timeout(); */
393 fprintf(stderr,"errno=%d ",errno);
402 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
403 if (i < 0) { perror("linger"); return(0); }
405 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
406 if (i < 0) { perror("keepalive"); return(0); }
409 if (host == NULL) goto end;
410 #ifndef BIT_FIELD_LIMITS
411 /* I should use WSAAsyncGetHostByName() under windows */
412 h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
413 sizeof(from.sin_addr.s_addr),AF_INET);
415 h1=gethostbyaddr((char *)&from.sin_addr,
416 sizeof(struct in_addr),AF_INET);
420 BIO_printf(bio_err,"bad gethostbyaddr\n");
426 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
428 perror("OPENSSL_malloc");
431 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
433 h2=GetHostByName(*host);
436 BIO_printf(bio_err,"gethostbyname failure\n");
440 if (h2->h_addrtype != AF_INET)
442 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
451 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
460 BIO_printf(bio_err,"no port defined\n");
465 if ((ip != NULL) && !host_ip(str,ip))
467 if (host_ptr != NULL) *host_ptr=h;
469 if (!extract_port(p,port_ptr))
476 static int host_ip(char *str, unsigned char ip[4])
481 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
486 BIO_printf(bio_err,"invalid IP address\n");
495 { /* do a gethostbyname */
498 if (!ssl_sock_init()) return(0);
500 he=GetHostByName(str);
503 BIO_printf(bio_err,"gethostbyname failure\n");
506 /* cast to short because of win16 winsock definition */
507 if ((short)he->h_addrtype != AF_INET)
509 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
512 ip[0]=he->h_addr_list[0][0];
513 ip[1]=he->h_addr_list[0][1];
514 ip[2]=he->h_addr_list[0][2];
515 ip[3]=he->h_addr_list[0][3];
522 int extract_port(char *str, short *port_ptr)
529 *port_ptr=(unsigned short)i;
532 s=getservbyname(str,"tcp");
535 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
538 *port_ptr=ntohs((unsigned short)s->s_port);
544 static struct ghbn_cache_st
549 } ghbn_cache[GHBN_NUM];
551 static unsigned long ghbn_hits=0L;
552 static unsigned long ghbn_miss=0L;
554 static struct hostent *GetHostByName(char *name)
558 unsigned long low= (unsigned long)-1;
560 for (i=0; i<GHBN_NUM; i++)
562 if (low > ghbn_cache[i].order)
564 low=ghbn_cache[i].order;
567 if (ghbn_cache[i].order > 0)
569 if (strncmp(name,ghbn_cache[i].name,128) == 0)
573 if (i == GHBN_NUM) /* no hit*/
576 ret=gethostbyname(name);
577 if (ret == NULL) return(NULL);
578 /* else add to cache */
579 if(strlen(name) < sizeof ghbn_cache[0].name)
581 strcpy(ghbn_cache[lowi].name,name);
582 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
583 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
590 ret= &(ghbn_cache[i].ent);
591 ghbn_cache[i].order=ghbn_miss+ghbn_hits;