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 #include <openssl/ssl.h>
72 #include <openssl/e_os2.h>
74 /* With IPv6, it looks like Digital has mixed up the proper order of
75 recursive header file inclusion, resulting in the compiler complaining
76 that u_int isn't defined, but only if _POSIX_C_SOURCE is defined, which
77 is needed to have fileno() declared correctly... So let's define u_int */
78 #if defined(OPENSSL_SYS_VMS_DECC) && !defined(__U_INT)
80 typedef unsigned int u_int;
83 static struct hostent *GetHostByName(char *name);
84 #ifdef OPENSSL_SYS_WINDOWS
85 static void sock_cleanup(void);
87 static int sock_init(void);
88 static int init_client_ip(int *sock,unsigned char ip[4], int port);
89 static int init_server(int *sock, int port);
90 static int init_server_long(int *sock, int port,char *ip);
91 static int do_accept(int acc_sock, int *sock, char **host);
92 static int host_ip(char *str, unsigned char ip[4]);
94 #ifdef OPENSSL_SYS_WIN16
95 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
97 #define SOCKET_PROTOCOL IPPROTO_TCP
100 #ifdef OPENSSL_SYS_WINDOWS
101 static struct WSAData wsa_state;
102 static int wsa_init_done=0;
104 #ifdef OPENSSL_SYS_WIN16
105 static HWND topWnd=0;
106 static FARPROC lpTopWndProc=NULL;
107 static FARPROC lpTopHookProc=NULL;
108 extern HINSTANCE _hInstance; /* nice global CRT provides */
110 static LONG FAR PASCAL topHookProc(HWND hwnd, UINT message, WPARAM wParam,
119 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopWndProc);
124 return CallWindowProc(lpTopWndProc,hwnd,message,wParam,lParam);
127 static BOOL CALLBACK enumproc(HWND hwnd,LPARAM lParam)
133 #endif /* OPENSSL_SYS_WIN32 */
134 #endif /* OPENSSL_SYS_WINDOWS */
136 #ifdef OPENSSL_SYS_WINDOWS
137 static void sock_cleanup(void)
142 WSACancelBlockingCall();
148 static int sock_init(void)
150 #ifdef OPENSSL_SYS_WINDOWS
156 signal(SIGINT,(void (*)(int))sock_cleanup);
159 memset(&wsa_state,0,sizeof(wsa_state));
160 if (WSAStartup(0x0101,&wsa_state)!=0)
162 err=WSAGetLastError();
163 BIO_printf(bio_err,"unable to start WINSOCK, error code=%d\n",err);
167 #ifdef OPENSSL_SYS_WIN16
168 EnumTaskWindows(GetCurrentTask(),enumproc,0L);
169 lpTopWndProc=(FARPROC)GetWindowLong(topWnd,GWL_WNDPROC);
170 lpTopHookProc=MakeProcInstance((FARPROC)topHookProc,_hInstance);
172 SetWindowLong(topWnd,GWL_WNDPROC,(LONG)lpTopHookProc);
173 #endif /* OPENSSL_SYS_WIN16 */
175 #endif /* OPENSSL_SYS_WINDOWS */
179 int init_client(int *sock, char *host, int port)
184 if (!host_ip(host,&(ip[0])))
189 return(init_client_ip(sock,ip,port));
192 static int init_client_ip(int *sock, unsigned char ip[4], int port)
195 struct sockaddr_in them;
198 if (!sock_init()) return(0);
200 memset((char *)&them,0,sizeof(them));
201 them.sin_family=AF_INET;
202 them.sin_port=htons((unsigned short)port);
204 ((unsigned long)ip[0]<<24L)|
205 ((unsigned long)ip[1]<<16L)|
206 ((unsigned long)ip[2]<< 8L)|
207 ((unsigned long)ip[3]);
208 them.sin_addr.s_addr=htonl(addr);
210 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
211 if (s == INVALID_SOCKET) { perror("socket"); return(0); }
213 #ifndef OPENSSL_SYS_MPE
215 i=setsockopt(s,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
216 if (i < 0) { perror("keepalive"); return(0); }
219 if (connect(s,(struct sockaddr *)&them,sizeof(them)) == -1)
220 { close(s); perror("connect"); return(0); }
225 int do_server(int port, int *ret, int (*cb)(), char *context)
232 if (!init_server(&accept_socket,port)) return(0);
241 if (do_accept(accept_socket,&sock,&name) == 0)
243 SHUTDOWN(accept_socket);
246 i=(*cb)(name,sock, context);
247 if (name != NULL) OPENSSL_free(name);
251 SHUTDOWN2(accept_socket);
257 static int init_server_long(int *sock, int port, char *ip)
260 struct sockaddr_in server;
263 if (!sock_init()) return(0);
265 memset((char *)&server,0,sizeof(server));
266 server.sin_family=AF_INET;
267 server.sin_port=htons((unsigned short)port);
269 server.sin_addr.s_addr=INADDR_ANY;
271 /* Added for T3E, address-of fails on bit field (beckman@acl.lanl.gov) */
272 #ifndef BIT_FIELD_LIMITS
273 memcpy(&server.sin_addr.s_addr,ip,4);
275 memcpy(&server.sin_addr,ip,4);
277 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
279 if (s == INVALID_SOCKET) goto err;
280 #if defined SOL_SOCKET && defined SO_REUSEADDR
283 setsockopt(s, SOL_SOCKET, SO_REUSEADDR,
284 (void *) &j, sizeof j);
287 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
289 #ifndef OPENSSL_SYS_WINDOWS
294 /* Make it 128 for linux */
295 if (listen(s,128) == -1) goto err;
300 if ((ret == 0) && (s != -1))
307 static int init_server(int *sock, int port)
309 return(init_server_long(sock, port, NULL));
312 static int do_accept(int acc_sock, int *sock, char **host)
315 struct hostent *h1,*h2;
316 static struct sockaddr_in from;
318 /* struct linger ling; */
320 if (!sock_init()) return(0);
322 #ifndef OPENSSL_SYS_WINDOWS
326 memset((char *)&from,0,sizeof(from));
328 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
329 * of type (int *) whereas under other systems it is (void *) if
330 * you don't have a cast it will choke the compiler: if you do
331 * have a cast then you can either go for (int *) or (void *).
333 ret=accept(acc_sock,(struct sockaddr *)&from,(void *)&len);
334 if (ret == INVALID_SOCKET)
336 #ifdef OPENSSL_SYS_WINDOWS
338 BIO_printf(bio_err,"accept error %d\n",i);
342 /*check_timeout(); */
345 fprintf(stderr,"errno=%d ",errno);
354 i=setsockopt(ret,SOL_SOCKET,SO_LINGER,(char *)&ling,sizeof(ling));
355 if (i < 0) { perror("linger"); return(0); }
357 i=setsockopt(ret,SOL_SOCKET,SO_KEEPALIVE,(char *)&i,sizeof(i));
358 if (i < 0) { perror("keepalive"); return(0); }
361 if (host == NULL) goto end;
362 #ifndef BIT_FIELD_LIMITS
363 /* I should use WSAAsyncGetHostByName() under windows */
364 h1=gethostbyaddr((char *)&from.sin_addr.s_addr,
365 sizeof(from.sin_addr.s_addr),AF_INET);
367 h1=gethostbyaddr((char *)&from.sin_addr,
368 sizeof(struct in_addr),AF_INET);
372 BIO_printf(bio_err,"bad gethostbyaddr\n");
378 if ((*host=(char *)OPENSSL_malloc(strlen(h1->h_name)+1)) == NULL)
380 perror("OPENSSL_malloc");
383 strcpy(*host,h1->h_name);
385 h2=GetHostByName(*host);
388 BIO_printf(bio_err,"gethostbyname failure\n");
392 if (h2->h_addrtype != AF_INET)
394 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
403 int extract_host_port(char *str, char **host_ptr, unsigned char *ip,
412 BIO_printf(bio_err,"no port defined\n");
417 if ((ip != NULL) && !host_ip(str,ip))
419 if (host_ptr != NULL) *host_ptr=h;
421 if (!extract_port(p,port_ptr))
428 static int host_ip(char *str, unsigned char ip[4])
433 if (sscanf(str,"%u.%u.%u.%u",&(in[0]),&(in[1]),&(in[2]),&(in[3])) == 4)
438 BIO_printf(bio_err,"invalid IP address\n");
447 { /* do a gethostbyname */
450 if (!sock_init()) return(0);
452 he=GetHostByName(str);
455 BIO_printf(bio_err,"gethostbyname failure\n");
458 /* cast to short because of win16 winsock definition */
459 if ((short)he->h_addrtype != AF_INET)
461 BIO_printf(bio_err,"gethostbyname addr is not AF_INET\n");
464 ip[0]=he->h_addr_list[0][0];
465 ip[1]=he->h_addr_list[0][1];
466 ip[2]=he->h_addr_list[0][2];
467 ip[3]=he->h_addr_list[0][3];
474 int extract_port(char *str, short *port_ptr)
481 *port_ptr=(unsigned short)i;
484 s=getservbyname(str,"tcp");
487 BIO_printf(bio_err,"getservbyname failure for %s\n",str);
490 *port_ptr=ntohs((unsigned short)s->s_port);
496 static struct ghbn_cache_st
501 } ghbn_cache[GHBN_NUM];
503 static unsigned long ghbn_hits=0L;
504 static unsigned long ghbn_miss=0L;
506 static struct hostent *GetHostByName(char *name)
510 unsigned long low= (unsigned long)-1;
512 for (i=0; i<GHBN_NUM; i++)
514 if (low > ghbn_cache[i].order)
516 low=ghbn_cache[i].order;
519 if (ghbn_cache[i].order > 0)
521 if (strncmp(name,ghbn_cache[i].name,128) == 0)
525 if (i == GHBN_NUM) /* no hit*/
528 ret=gethostbyname(name);
529 if (ret == NULL) return(NULL);
530 /* else add to cache */
531 strncpy(ghbn_cache[lowi].name,name,128);
532 memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent));
533 ghbn_cache[lowi].order=ghbn_miss+ghbn_hits;
539 ret= &(ghbn_cache[i].ent);
540 ghbn_cache[i].order=ghbn_miss+ghbn_hits;