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 #if defined(OPENSSL_SYS_NETWARE) && defined(NETWARE_BSDSOCK)
94 static struct hostent *GetHostByName(char *name);
95 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
96 static void ssl_sock_cleanup(void);
98 static int ssl_sock_init(void);
99 static int init_client_ip(int *sock,unsigned char ip[4], int port, int type);
100 static int init_server(int *sock, int port, int type);
101 static int init_server_long(int *sock, int port,char *ip, int type);
102 static int do_accept(int acc_sock, int *sock, char **host);
103 static int host_ip(char *str, unsigned char ip[4]);
105 #ifdef OPENSSL_SYS_WIN16
106 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
108 #define SOCKET_PROTOCOL IPPROTO_TCP
111 #if defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
112 static int wsa_init_done=0;
115 #ifdef OPENSSL_SYS_WINDOWS
116 static struct WSAData wsa_state;
117 static int wsa_init_done=0;
119 #ifdef OPENSSL_SYS_WIN16
120 static HWND topWnd=0;
121 static FARPROC lpTopWndProc=NULL;
122 static FARPROC lpTopHookProc=NULL;
123 extern HINSTANCE _hInstance; /* nice global CRT provides */
125 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
134 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
139 return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
142 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
148 #endif /* OPENSSL_SYS_WIN32 */
149 #endif /* OPENSSL_SYS_WINDOWS */
151 #ifdef OPENSSL_SYS_WINDOWS
152 static void ssl_sock_cleanup(void)
157 #ifndef OPENSSL_SYS_WINCE
158 WSACancelBlockingCall();
163 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
164 static void sock_cleanup(void)
174 static int ssl_sock_init(void)
177 extern int _watt_do_exit;
181 #elif defined(OPENSSL_SYS_WINDOWS)
187 signal(SIGINT,(void (*)(int))ssl_sock_cleanup);
190 memset(&wsa_state,0,sizeof(wsa_state));
191 if (WSAStartup(0x0101,&wsa_state)!=0)
193 err=WSAGetLastError();
194 BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
198 #ifdef OPENSSL_SYS_WIN16
199 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
200 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
201 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
203 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
204 #endif /* OPENSSL_SYS_WIN16 */
206 #elif defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK)
215 signal(SIGINT,(void (*)(int))sock_cleanup);
219 wVerReq = MAKEWORD( 2, 0 );
220 err = WSAStartup(wVerReq,&wsaData);
223 BIO_printf(bio_err,"unable to start WINSOCK2, error code=%d\n",err);
227 #endif /* OPENSSL_SYS_WINDOWS */
231 int init_client(int *sock, char *host, int port, int type)
235 if (!host_ip(host,&(ip[0])))
239 return(init_client_ip(sock,ip,port,type));
242 static int init_client_ip(int *sock, unsigned char ip[4], int port, int type)
245 struct sockaddr_in them;
248 if (!ssl_sock_init()) return(0);
250 memset((char *)&them,0,sizeof(them));
251 them.sin_family=AF_INET;
252 them.sin_port=htons((unsigned short)port);
254 ((unsigned long)ip[0]<<24L)|
255 ((unsigned long)ip[1]<<16L)|
256 ((unsigned long)ip[2]<< 8L)|
257 ((unsigned long)ip[3]);
258 them.sin_addr.s_addr=htonl(addr);
260 if (type == SOCK_STREAM)
261 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
262 else /* ( type == SOCK_DGRAM) */
263 s=socket(AF_INET,SOCK_DGRAM,IPPROTO_UDP);
265 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
267 #if defined(SO_KEEPALIVE) && !defined(OPENSSL_SYS_MPE)
268 if (type == SOCK_STREAM)
271 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
272 if (i < 0) { perror("keepalive"); return(0); }
276 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
277 { closesocket(s); perror("connect"); return(0); }
282 int do_server(int port, int type, int *ret, int (*cb)(char *hostname, int s, unsigned char *context), unsigned char *context)
286 int accept_socket = 0;
289 if (!init_server(&accept_socket,port,type)) return(0);
298 if (type==SOCK_STREAM)
300 if (do_accept(accept_socket,&sock,&name) == 0)
302 SHUTDOWN(accept_socket);
307 sock = accept_socket;
308 i=(*cb)(name,sock, context);
309 if (name != NULL) OPENSSL_free(name);
310 if (type==SOCK_STREAM)
314 SHUTDOWN2(accept_socket);
320 static int init_server_long(int *sock, int port, char *ip, int type)
323 struct sockaddr_in server;
326 if (!ssl_sock_init()) return(0);
328 memset((char *)&server,0,sizeof(server));
329 server.sin_family=AF_INET;
330 server.sin_port=htons((unsigned short)port);
332 server.sin_addr.s_addr=INADDR_ANY;
334 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
335 #ifndef BIT_FIELD_LIMITS
336 memcpy(&server.sin_addr.s_addr,ip,4);
338 memcpy(&server.sin_addr,ip,4);
341 if (type == SOCK_STREAM)
342 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
343 else /* type == SOCK_DGRAM */
344 s=socket(AF_INET, SOCK_DGRAM,IPPROTO_UDP);
346 if (s == INVALID_SOCKET) goto err;
347 #if defined SOL_SOCKET && defined SO_REUSEADDR
350 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
351 (void *) &j, sizeof j);
354 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
356 #ifndef OPENSSL_SYS_WINDOWS
361 /* Make it 128 for linux */
362 if (type==SOCK_STREAM && listen(s,128) == -1) goto err;
367 if ((ret == 0) && (s != -1))
374 static int init_server(int *sock, int port, int type)
376 return(init_server_long(sock, port, NULL, type));
379 static int do_accept(int acc_sock, int *sock, char **host)
382 struct hostent *h1,*h2;
383 static struct sockaddr_in from;
385 /* struct linger ling; */
387 if (!ssl_sock_init()) return(0);
389 #ifndef OPENSSL_SYS_WINDOWS
393 memset((char *)&from,0,sizeof(from));
395 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
396 * of type (int *) whereas under other systems it is (void *) if
397 * you don't have a cast it will choke the compiler: if you do
398 * have a cast then you can either go for (int *) or (void *).
400 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
401 if (ret == INVALID_SOCKET)
403 #if defined(OPENSSL_SYS_WINDOWS) || (defined(OPENSSL_SYS_NETWARE) && !defined(NETWARE_BSDSOCK))
405 BIO_printf(bio_err,"accept error %d\n",i);
409 /*check_timeout(); */
412 fprintf(stderr,"errno=%d ",errno);
421 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
422 if (i < 0) { perror("linger"); return(0); }
424 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
425 if (i < 0) { perror("keepalive"); return(0); }
428 if (host == NULL) goto end;
429 #ifndef BIT_FIELD_LIMITS
430 /* I should use WSAAsyncGetHostByName() under windows */
431 h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
432 sizeof(from.sin_addr.s_addr),AF_INET);
434 h1=gethostbyaddr((char *)&from.sin_addr,
435 sizeof(struct in_addr),AF_INET);
439 BIO_printf(bio_err,"bad gethostbyaddr\n");
445 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
447 perror("OPENSSL_malloc");
450 BUF_strlcpy(*host,h1->h_name,strlen(h1->h_name)+1);
452 h2=GetHostByName(*host);
455 BIO_printf(bio_err,"gethostbyname failure\n");
459 if (h2->h_addrtype != AF_INET)
461 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
470 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
479 BIO_printf(bio_err,"no port defined\n");
484 if ((ip != NULL) && !host_ip(str,ip))
486 if (host_ptr != NULL) *host_ptr=h;
488 if (!extract_port(p,port_ptr))
495 static int host_ip(char *str, unsigned char ip[4])
500 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
505 BIO_printf(bio_err,"invalid IP address\n");
514 { /* do a gethostbyname */
517 if (!ssl_sock_init()) return(0);
519 he=GetHostByName(str);
522 BIO_printf(bio_err,"gethostbyname failure\n");
525 /* cast to short because of win16 winsock definition */
526 if ((short)he->h_addrtype != AF_INET)
528 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
531 ip[0]=he->h_addr_list[0][0];
532 ip[1]=he->h_addr_list[0][1];
533 ip[2]=he->h_addr_list[0][2];
534 ip[3]=he->h_addr_list[0][3];
541 int extract_port(char *str, short *port_ptr)
548 *port_ptr=(unsigned short)i;
551 s=getservbyname(str,"tcp");
554 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
557 *port_ptr=ntohs((unsigned short)s->s_port);
563 static struct ghbn_cache_st
568 } ghbn_cache[GHBN_NUM];
570 static unsigned long ghbn_hits=0L;
571 static unsigned long ghbn_miss=0L;
573 static struct hostent *GetHostByName(char *name)
577 unsigned long low= (unsigned long)-1;
579 for (i=0; i<GHBN_NUM; i++)
581 if (low > ghbn_cache[i].order)
583 low=ghbn_cache[i].order;
586 if (ghbn_cache[i].order > 0)
588 if (strncmp(name,ghbn_cache[i].name,128) == 0)
592 if (i == GHBN_NUM) /* no hit*/
595 ret=gethostbyname(name);
596 if (ret == NULL) return(NULL);
597 /* else add to cache */
598 if(strlen(name) < sizeof ghbn_cache[0].name)
600 strcpy(ghbn_cache[lowi].name,name);
601 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
602 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
609 ret= &(ghbn_cache[i].ent);
610 ghbn_cache[i].order=ghbn_miss+ghbn_hits;