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.]
71 /* With IPv6, it looks like Digital has mixed up the proper order of
72 recursive header file inclusion, resulting in the compiler complaining
73 that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
74 is needed to have fileno() declared correctly... So let's define u_int */
75 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
77 typedef unsigned int u_int;
86 #include <openssl/ssl.h>
94 #ifndef OPENSSL_NO_SOCK
96 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
100 static struct hostent *GetHostByName(char *name);
101 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
102 static void ssl_sock_cleanup(void);
104 static int ssl_sock_init(void);
105 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
106 static int init_server(int *sock, int port, int type);
107 static int init_server_long(int *sock, int port,char *ip, int type);
108 static int do_accept(int acc_sock, int *sock, char **host);
109 static int host_ip(char *str, unsigned char ip[4]);
111 #ifdef OPENSSL_SYS_WIN16
112 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
114 #define SOCKET_PROTOCOL IPPROTO_TCP
117 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
118 static int wsa_init_done=0;
121 #ifdef OPENSSL_SYS_WINDOWS
122 static struct WSAData wsa_state;
123 static int wsa_init_done=0;
125 #ifdef OPENSSL_SYS_WIN16
126 static HWND topWnd=0;
127 static FARPROC lpTopWndProc=NULL;
128 static FARPROC lpTopHookProc=NULL;
129 extern HINSTANCE _hInstance; /* nice global CRT provides */
131 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
140 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
145 return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
148 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
154 #endif /* OPENSSL_SYS_WIN32 */
155 #endif /* OPENSSL_SYS_WINDOWS */
157 #ifdef OPENSSL_SYS_WINDOWS
158 static void ssl_sock_cleanup(void)
163 #ifndef OPENSSL_SYS_WINCE
164 WSACancelBlockingCall();
169 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
170 static void sock_cleanup(void)
180 static int ssl_sock_init(void)
183 extern int _watt_do_exit;
187 #elif defined(OPENSSL_SYS_WINDOWS)
193 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
196 memset(&wsa_state,0,sizeof(wsa_state));
197 if (WSAStartup(0x0101,&wsa_state)!=0)
199 err=WSAGetLastError();
200 BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
204 #ifdef OPENSSL_SYS_WIN16
205 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
206 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
207 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
209 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
210 #endif /* OPENSSL_SYS_WIN16 */
212 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
221 signal(SIGINT,(void (*)(int))sock_cleanup);
225 wVerReq = MAKEWORD( 2, 0 );
226 err = WSAStartup(wVerReq,&wsaData);
229 BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
233 #endif /* OPENSSL_SYS_WINDOWS */
237 int init_client(int *sock, char *host, int port, int type)
241 memset(ip, '\0', sizeof ip);
242 if (!host_ip(host,&(ip[0])))
244 return init_client_ip(sock,ip,port,type);
247 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
250 struct sockaddr_in them;
253 if (!ssl_sock_init()) return(0);
255 memset((char *)&them,0,sizeof(them));
256 them.sin_family=AF_INET;
257 them.sin_port=htons((unsigned short)port);
259 ((unsigned long)ip[0]<<24L)|
260 ((unsigned long)ip[1]<<16L)|
261 ((unsigned long)ip[2]<< 8L)|
262 ((unsigned long)ip[3]);
263 them.sin_addr.s_addr=htonl(addr);
265 if (type == SOCK_STREAM)
266 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
267 else /* ( type == SOCK_DGRAM) */
268 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
270 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
272 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
273 if (type == SOCK_STREAM)
276 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
277 if (i < 0) { closesocket(s); perror("keepalive"); return(0); }
281 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
282 { closesocket(s); perror("connect"); return(0); }
287 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
291 int accept_socket = 0;
294 if (!init_server(&accept_socket,port,type)) return(0);
303 if (type==SOCK_STREAM)
305 if (do_accept(accept_socket,&sock,&name) == 0)
307 SHUTDOWN(accept_socket);
312 sock = accept_socket;
313 i=(*cb)(name,sock, context);
314 if (name != NULL) OPENSSL_free(name);
315 if (type==SOCK_STREAM)
319 SHUTDOWN2(accept_socket);
325 static int init_server_long(int *sock, int port, char *ip, int type)
328 struct sockaddr_in server;
331 if (!ssl_sock_init()) return(0);
333 memset((char *)&server,0,sizeof(server));
334 server.sin_family=AF_INET;
335 server.sin_port=htons((unsigned short)port);
337 server.sin_addr.s_addr=INADDR_ANY;
339 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
340 #ifndef BIT_FIELD_LIMITS
341 memcpy(&server.sin_addr.s_addr,ip,4);
343 memcpy(&server.sin_addr,ip,4);
346 if (type == SOCK_STREAM)
347 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
348 else /* type == SOCK_DGRAM */
349 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
351 if (s == INVALID_SOCKET) goto err;
352 #if defined SOL_SOCKET && defined SO_REUSEADDR
355 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
356 (void *) &j, sizeof j);
359 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
361 #ifndef OPENSSL_SYS_WINDOWS
366 /* Make it 128 for linux */
367 if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
371 if ((ret == 0) && (s != -1))
378 static int init_server(int *sock, int port, int type)
380 return(init_server_long(sock, port, NULL, type));
383 static int do_accept(int acc_sock, int *sock, char **host)
386 struct hostent *h1,*h2;
387 static struct sockaddr_in from;
389 /* struct linger ling; */
391 if (!ssl_sock_init()) return(0);
393 #ifndef OPENSSL_SYS_WINDOWS
397 memset((char *)&from,0,sizeof(from));
399 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
400 * of type (int *) whereas under other systems it is (void *) if
401 * you don't have a cast it will choke the compiler: if you do
402 * have a cast then you can either go for (int *) or (void *).
404 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
405 if (ret == INVALID_SOCKET)
407 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
410 BIO_printf(bio_err,"accept error %d\n",i);
414 /*check_timeout(); */
417 fprintf(stderr,"errno=%d ",errno);
426 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
427 if (i < 0) { perror("linger"); return(0); }
429 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
430 if (i < 0) { perror("keepalive"); return(0); }
433 if (host == NULL) goto end;
434 #ifndef BIT_FIELD_LIMITS
435 /* I should use WSAAsyncGetHostByName() under windows */
436 h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
437 sizeof(from.sin_addr.s_addr),AF_INET);
439 h1=gethostbyaddr((char *)&from.sin_addr,
440 sizeof(struct in_addr),AF_INET);
444 BIO_printf(bio_err,"bad gethostbyaddr\n");
450 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
452 perror("OPENSSL_malloc");
456 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
458 h2=GetHostByName(*host);
461 BIO_printf(bio_err,"gethostbyname failure\n");
465 if (h2->h_addrtype != AF_INET)
467 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
477 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
486 BIO_printf(bio_err,"no port defined\n");
491 if ((ip != NULL) && !host_ip(str,ip))
493 if (host_ptr != NULL) *host_ptr=h;
495 if (!extract_port(p,port_ptr))
502 static int host_ip(char *str, unsigned char ip[4])
507 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
512 BIO_printf(bio_err,"invalid IP address\n");
521 { /* do a gethostbyname */
524 if (!ssl_sock_init()) return(0);
526 he=GetHostByName(str);
529 BIO_printf(bio_err,"gethostbyname failure\n");
532 /* cast to short because of win16 winsock definition */
533 if ((short)he->h_addrtype != AF_INET)
535 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
538 ip[0]=he->h_addr_list[0][0];
539 ip[1]=he->h_addr_list[0][1];
540 ip[2]=he->h_addr_list[0][2];
541 ip[3]=he->h_addr_list[0][3];
548 int extract_port(char *str, short *port_ptr)
555 *port_ptr=(unsigned short)i;
558 s=getservbyname(str,"tcp");
561 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
564 *port_ptr=ntohs((unsigned short)s->s_port);
570 static struct ghbn_cache_st
575 } ghbn_cache[GHBN_NUM];
577 static unsigned long ghbn_hits=0L;
578 static unsigned long ghbn_miss=0L;
580 static struct hostent *GetHostByName(char *name)
584 unsigned long low= (unsigned long)-1;
586 for (i=0; i<GHBN_NUM; i++)
588 if (low > ghbn_cache[i].order)
590 low=ghbn_cache[i].order;
593 if (ghbn_cache[i].order > 0)
595 if (strncmp(name,ghbn_cache[i].name,128) == 0)
599 if (i == GHBN_NUM) /* no hit*/
602 ret=gethostbyname(name);
603 if (ret == NULL) return(NULL);
604 /* else add to cache */
605 if(strlen(name) < sizeof ghbn_cache[0].name)
607 strcpy(ghbn_cache[lowi].name,name);
608 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
609 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
616 ret= &(ghbn_cache[i].ent);
617 ghbn_cache[i].order=ghbn_miss+ghbn_hits;