1 /* crypto/bio/b_sock.c */
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.]
66 #include <openssl/bio.h>
69 #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */
71 #define SOCKET_PROTOCOL IPPROTO_TCP
75 #define MAX_LISTEN SOMAXCONN
76 #elif defined(SO_MAXCONN)
77 #define MAX_LISTEN SO_MAXCONN
83 static int wsa_init_done=0;
86 static unsigned long BIO_ghbn_hits=0L;
87 static unsigned long BIO_ghbn_miss=0L;
90 static struct ghbn_cache_st
95 } ghbn_cache[GHBN_NUM];
97 static int get_ip(const char *str,unsigned char *ip);
98 static void ghbn_free(struct hostent *a);
99 static struct hostent *ghbn_dup(struct hostent *a);
100 int BIO_get_host_ip(const char *str, unsigned char *ip)
108 if (i > 0) return(1);
111 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
115 /* do a gethostbyname */
116 if (!BIO_sock_init())
117 return(0); /* don't generate another error code here */
119 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
121 he=BIO_gethostbyname(str);
124 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
128 /* cast to short because of win16 winsock definition */
129 if ((short)he->h_addrtype != AF_INET)
131 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
135 ip[i]=he->h_addr_list[0][i];
140 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
143 ERR_add_error_data(2,"host=",str);
150 int BIO_get_port(const char *str, unsigned short *port_ptr)
157 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
162 *port_ptr=(unsigned short)i;
165 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
166 s=getservbyname(str,"tcp");
168 *port_ptr=ntohs((unsigned short)s->s_port);
169 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
172 if (strcmp(str,"http") == 0)
174 else if (strcmp(str,"telnet") == 0)
176 else if (strcmp(str,"socks") == 0)
178 else if (strcmp(str,"https") == 0)
180 else if (strcmp(str,"ssl") == 0)
182 else if (strcmp(str,"ftp") == 0)
184 else if (strcmp(str,"gopher") == 0)
187 else if (strcmp(str,"wais") == 0)
192 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
193 ERR_add_error_data(3,"service='",str,"'");
201 int BIO_sock_error(int sock)
207 /* Note: under Windows the third parameter is of type (char *)
208 * whereas under other systems it is (void *) if you don't have
209 * a cast it will choke the compiler: if you do have a cast then
210 * you can either go for (char *) or (void *).
212 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
219 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
226 case BIO_GHBN_CTRL_HITS:
227 return(BIO_ghbn_hits);
229 case BIO_GHBN_CTRL_MISSES:
230 return(BIO_ghbn_miss);
232 case BIO_GHBN_CTRL_CACHE_SIZE:
235 case BIO_GHBN_CTRL_GET_ENTRY:
236 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
237 (ghbn_cache[iarg].order > 0))
240 if (p == NULL) return(0);
241 *p=ghbn_cache[iarg].name;
242 ghbn_cache[iarg].name[128]='\0';
247 case BIO_GHBN_CTRL_FLUSH:
248 for (i=0; i<GHBN_NUM; i++)
249 ghbn_cache[i].order=0;
257 static struct hostent *ghbn_dup(struct hostent *a)
263 ret=(struct hostent *)Malloc(sizeof(struct hostent));
264 if (ret == NULL) return(NULL);
265 memset(ret,0,sizeof(struct hostent));
267 for (i=0; a->h_aliases[i] != NULL; i++)
270 ret->h_aliases = (char **)Malloc(i*sizeof(char *));
271 if (ret->h_aliases == NULL)
273 memset(ret->h_aliases, 0, i*sizeof(char *));
275 for (i=0; a->h_addr_list[i] != NULL; i++)
278 ret->h_addr_list=(char **)Malloc(i*sizeof(char *));
279 if (ret->h_addr_list == NULL)
281 memset(ret->h_addr_list, 0, i*sizeof(char *));
283 j=strlen(a->h_name)+1;
284 if ((ret->h_name=Malloc(j)) == NULL) goto err;
285 memcpy((char *)ret->h_name,a->h_name,j);
286 for (i=0; a->h_aliases[i] != NULL; i++)
288 j=strlen(a->h_aliases[i])+1;
289 if ((ret->h_aliases[i]=Malloc(j)) == NULL) goto err;
290 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
292 ret->h_length=a->h_length;
293 ret->h_addrtype=a->h_addrtype;
294 for (i=0; a->h_addr_list[i] != NULL; i++)
296 if ((ret->h_addr_list[i]=Malloc(a->h_length)) == NULL)
298 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
311 static void ghbn_free(struct hostent *a)
318 if (a->h_aliases != NULL)
320 for (i=0; a->h_aliases[i] != NULL; i++)
321 Free(a->h_aliases[i]);
324 if (a->h_addr_list != NULL)
326 for (i=0; a->h_addr_list[i] != NULL; i++)
327 Free(a->h_addr_list[i]);
328 Free(a->h_addr_list);
330 if (a->h_name != NULL) Free((char *)a->h_name);
334 struct hostent *BIO_gethostbyname(const char *name)
338 unsigned long low= (unsigned long)-1;
340 /* return(gethostbyname(name)); */
342 #if 0 /* It doesn't make sense to use locking here: The function interface
343 * is not thread-safe, because threads can never be sure when
344 * some other thread destroys the data they were given a pointer to.
346 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
351 for (i=0; i<GHBN_NUM; i++)
353 if (low > ghbn_cache[i].order)
355 low=ghbn_cache[i].order;
358 if (ghbn_cache[i].order > 0)
360 if (strncmp(name,ghbn_cache[i].name,128) == 0)
368 if (i == GHBN_NUM) /* no hit*/
371 ret=gethostbyname(name);
375 if (j > 128) /* too big to cache */
377 #if 0 /* If we were trying to make this function thread-safe (which
378 * is bound to fail), we'd have to give up in this case
379 * (or allocate more memory). */
385 /* else add to cache */
386 if (ghbn_cache[lowi].ent != NULL)
387 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
388 ghbn_cache[lowi].name[0] = '\0';
390 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
392 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
395 strncpy(ghbn_cache[lowi].name,name,128);
396 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
401 ret= ghbn_cache[i].ent;
402 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
406 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
411 int BIO_sock_init(void)
414 static struct WSAData wsa_state;
421 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
424 memset(&wsa_state,0,sizeof(wsa_state));
425 if (WSAStartup(0x0101,&wsa_state)!=0)
427 err=WSAGetLastError();
428 SYSerr(SYS_F_WSASTARTUP,err);
429 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
437 void BIO_sock_cleanup(void)
443 WSACancelBlockingCall();
449 #if !defined(VMS) || __VMS_VER >= 70000000
451 int BIO_socket_ioctl(int fd, long type, unsigned long *arg)
455 i=ioctlsocket(fd,type,arg);
457 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
460 #endif /* __VMS_VER */
462 /* The reason I have implemented this instead of using sscanf is because
463 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
464 static int get_ip(const char *str, unsigned char ip[4])
469 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
474 if ((c >= '0') && (c <= '9'))
477 tmp[num]=tmp[num]*10+c-'0';
478 if (tmp[num] > 255) return(-1);
487 else if ((num == 3) && ok)
499 int BIO_get_accept_socket(char *host, int bind_mode)
502 struct sockaddr_in server,client;
511 if (!BIO_sock_init()) return(INVALID_SOCKET);
513 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
537 if (!BIO_get_port(p,&port)) return(INVALID_SOCKET);
539 memset((char *)&server,0,sizeof(server));
540 server.sin_family=AF_INET;
541 server.sin_port=htons(port);
543 if (strcmp(h,"*") == 0)
544 server.sin_addr.s_addr=INADDR_ANY;
547 if (!BIO_get_host_ip(h,&(ip[0]))) return(INVALID_SOCKET);
549 ((unsigned long)ip[0]<<24L)|
550 ((unsigned long)ip[1]<<16L)|
551 ((unsigned long)ip[2]<< 8L)|
552 ((unsigned long)ip[3]);
553 server.sin_addr.s_addr=htonl(l);
557 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
558 if (s == INVALID_SOCKET)
560 SYSerr(SYS_F_SOCKET,get_last_socket_error());
561 ERR_add_error_data(3,"port='",host,"'");
562 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
567 if (bind_mode == BIO_BIND_REUSEADDR)
571 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
572 bind_mode=BIO_BIND_NORMAL;
575 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
578 err_num=get_last_socket_error();
579 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
580 (err_num == EADDRINUSE))
582 memcpy((char *)&client,(char *)&server,sizeof(server));
583 if (strcmp(h,"*") == 0)
584 client.sin_addr.s_addr=htonl(0x7F000001);
585 cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
586 if (cs != INVALID_SOCKET)
589 ii=connect(cs,(struct sockaddr *)&client,
592 if (ii == INVALID_SOCKET)
594 bind_mode=BIO_BIND_REUSEADDR;
603 SYSerr(SYS_F_BIND,err_num);
604 ERR_add_error_data(3,"port='",host,"'");
605 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
608 if (listen(s,MAX_LISTEN) == -1)
610 SYSerr(SYS_F_BIND,get_last_socket_error());
611 ERR_add_error_data(3,"port='",host,"'");
612 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
617 if (str != NULL) Free(str);
618 if ((ret == 0) && (s != INVALID_SOCKET))
626 int BIO_accept(int sock, char **addr)
628 int ret=INVALID_SOCKET;
629 static struct sockaddr_in from;
635 memset((char *)&from,0,sizeof(from));
637 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
638 * of type (int *) whereas under other systems it is (void *) if
639 * you don't have a cast it will choke the compiler: if you do
640 * have a cast then you can either go for (int *) or (void *).
642 ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
643 if (ret == INVALID_SOCKET)
645 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
646 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
650 if (addr == NULL) goto end;
652 l=ntohl(from.sin_addr.s_addr);
653 port=ntohs(from.sin_port);
656 if ((p=Malloc(24)) == NULL)
658 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
663 sprintf(*addr,"%d.%d.%d.%d:%d",
664 (unsigned char)(l>>24L)&0xff,
665 (unsigned char)(l>>16L)&0xff,
666 (unsigned char)(l>> 8L)&0xff,
667 (unsigned char)(l )&0xff,
673 int BIO_set_tcp_ndelay(int s, int on)
676 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
687 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
693 int BIO_socket_nbio(int s, int mode)
700 ret=BIO_socket_ioctl(s,FIONBIO,&l);