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)
110 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS);
114 /* At this point, we have something that is most probably correct
115 in some way, so let's init the socket. */
116 if (!BIO_sock_init())
117 return(0); /* don't generate another error code here */
119 /* If the string actually contained an IP address, we need not do
121 if (i > 0) return(1);
123 /* do a gethostbyname */
124 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
126 he=BIO_gethostbyname(str);
129 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP);
133 /* cast to short because of win16 winsock definition */
134 if ((short)he->h_addrtype != AF_INET)
136 BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET);
140 ip[i]=he->h_addr_list[0][i];
145 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
148 ERR_add_error_data(2,"host=",str);
155 int BIO_get_port(const char *str, unsigned short *port_ptr)
162 BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED);
167 *port_ptr=(unsigned short)i;
170 CRYPTO_w_lock(CRYPTO_LOCK_GETSERVBYNAME);
171 /* Note: under VMS with SOCKETSHR, it seems like the first
172 * parameter is 'char *', instead of 'const char *'
180 *port_ptr=ntohs((unsigned short)s->s_port);
181 CRYPTO_w_unlock(CRYPTO_LOCK_GETSERVBYNAME);
184 if (strcmp(str,"http") == 0)
186 else if (strcmp(str,"telnet") == 0)
188 else if (strcmp(str,"socks") == 0)
190 else if (strcmp(str,"https") == 0)
192 else if (strcmp(str,"ssl") == 0)
194 else if (strcmp(str,"ftp") == 0)
196 else if (strcmp(str,"gopher") == 0)
199 else if (strcmp(str,"wais") == 0)
204 SYSerr(SYS_F_GETSERVBYNAME,get_last_socket_error());
205 ERR_add_error_data(3,"service='",str,"'");
213 int BIO_sock_error(int sock)
219 /* Note: under Windows the third parameter is of type (char *)
220 * whereas under other systems it is (void *) if you don't have
221 * a cast it will choke the compiler: if you do have a cast then
222 * you can either go for (char *) or (void *).
224 i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(void *)&j,(void *)&size);
231 long BIO_ghbn_ctrl(int cmd, int iarg, char *parg)
238 case BIO_GHBN_CTRL_HITS:
239 return(BIO_ghbn_hits);
241 case BIO_GHBN_CTRL_MISSES:
242 return(BIO_ghbn_miss);
244 case BIO_GHBN_CTRL_CACHE_SIZE:
247 case BIO_GHBN_CTRL_GET_ENTRY:
248 if ((iarg >= 0) && (iarg <GHBN_NUM) &&
249 (ghbn_cache[iarg].order > 0))
252 if (p == NULL) return(0);
253 *p=ghbn_cache[iarg].name;
254 ghbn_cache[iarg].name[128]='\0';
259 case BIO_GHBN_CTRL_FLUSH:
260 for (i=0; i<GHBN_NUM; i++)
261 ghbn_cache[i].order=0;
269 static struct hostent *ghbn_dup(struct hostent *a)
275 ret=(struct hostent *)OPENSSL_malloc(sizeof(struct hostent));
276 if (ret == NULL) return(NULL);
277 memset(ret,0,sizeof(struct hostent));
279 for (i=0; a->h_aliases[i] != NULL; i++)
282 ret->h_aliases = (char **)OPENSSL_malloc(i*sizeof(char *));
283 if (ret->h_aliases == NULL)
285 memset(ret->h_aliases, 0, i*sizeof(char *));
287 for (i=0; a->h_addr_list[i] != NULL; i++)
290 ret->h_addr_list=(char **)OPENSSL_malloc(i*sizeof(char *));
291 if (ret->h_addr_list == NULL)
293 memset(ret->h_addr_list, 0, i*sizeof(char *));
295 j=strlen(a->h_name)+1;
296 if ((ret->h_name=OPENSSL_malloc(j)) == NULL) goto err;
297 memcpy((char *)ret->h_name,a->h_name,j);
298 for (i=0; a->h_aliases[i] != NULL; i++)
300 j=strlen(a->h_aliases[i])+1;
301 if ((ret->h_aliases[i]=OPENSSL_malloc(j)) == NULL) goto err;
302 memcpy(ret->h_aliases[i],a->h_aliases[i],j);
304 ret->h_length=a->h_length;
305 ret->h_addrtype=a->h_addrtype;
306 for (i=0; a->h_addr_list[i] != NULL; i++)
308 if ((ret->h_addr_list[i]=OPENSSL_malloc(a->h_length)) == NULL)
310 memcpy(ret->h_addr_list[i],a->h_addr_list[i],a->h_length);
323 static void ghbn_free(struct hostent *a)
330 if (a->h_aliases != NULL)
332 for (i=0; a->h_aliases[i] != NULL; i++)
333 OPENSSL_free(a->h_aliases[i]);
334 OPENSSL_free(a->h_aliases);
336 if (a->h_addr_list != NULL)
338 for (i=0; a->h_addr_list[i] != NULL; i++)
339 OPENSSL_free(a->h_addr_list[i]);
340 OPENSSL_free(a->h_addr_list);
342 if (a->h_name != NULL) OPENSSL_free(a->h_name);
346 struct hostent *BIO_gethostbyname(const char *name)
350 unsigned long low= (unsigned long)-1;
352 /* return(gethostbyname(name)); */
354 #if 0 /* It doesn't make sense to use locking here: The function interface
355 * is not thread-safe, because threads can never be sure when
356 * some other thread destroys the data they were given a pointer to.
358 CRYPTO_w_lock(CRYPTO_LOCK_GETHOSTBYNAME);
363 for (i=0; i<GHBN_NUM; i++)
365 if (low > ghbn_cache[i].order)
367 low=ghbn_cache[i].order;
370 if (ghbn_cache[i].order > 0)
372 if (strncmp(name,ghbn_cache[i].name,128) == 0)
380 if (i == GHBN_NUM) /* no hit*/
383 /* Note: under VMS with SOCKETSHR, it seems like the first
384 * parameter is 'char *', instead of 'const char *'
394 if (j > 128) /* too big to cache */
396 #if 0 /* If we were trying to make this function thread-safe (which
397 * is bound to fail), we'd have to give up in this case
398 * (or allocate more memory). */
404 /* else add to cache */
405 if (ghbn_cache[lowi].ent != NULL)
406 ghbn_free(ghbn_cache[lowi].ent); /* XXX not thread-safe */
407 ghbn_cache[lowi].name[0] = '\0';
409 if((ret=ghbn_cache[lowi].ent=ghbn_dup(ret)) == NULL)
411 BIOerr(BIO_F_BIO_GETHOSTBYNAME,ERR_R_MALLOC_FAILURE);
414 strncpy(ghbn_cache[lowi].name,name,128);
415 ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits;
420 ret= ghbn_cache[i].ent;
421 ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits;
425 CRYPTO_w_unlock(CRYPTO_LOCK_GETHOSTBYNAME);
430 int BIO_sock_init(void)
433 static struct WSAData wsa_state;
440 signal(SIGINT,(void (*)(int))BIO_sock_cleanup);
443 memset(&wsa_state,0,sizeof(wsa_state));
444 if (WSAStartup(0x0101,&wsa_state)!=0)
446 err=WSAGetLastError();
447 SYSerr(SYS_F_WSASTARTUP,err);
448 BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP);
456 void BIO_sock_cleanup(void)
462 WSACancelBlockingCall();
468 #if !defined(VMS) || __VMS_VER >= 70000000
470 int BIO_socket_ioctl(int fd, long type, unsigned long *arg)
474 i=ioctlsocket(fd,type,arg);
476 SYSerr(SYS_F_IOCTLSOCKET,get_last_socket_error());
479 #endif /* __VMS_VER */
481 /* The reason I have implemented this instead of using sscanf is because
482 * Visual C 1.52c gives an unresolved external when linking a DLL :-( */
483 static int get_ip(const char *str, unsigned char ip[4])
488 tmp[0]=tmp[1]=tmp[2]=tmp[3]=0;
493 if ((c >= '0') && (c <= '9'))
496 tmp[num]=tmp[num]*10+c-'0';
497 if (tmp[num] > 255) return(-1);
506 else if ((num == 3) && ok)
518 int BIO_get_accept_socket(char *host, int bind_mode)
521 struct sockaddr_in server,client;
530 if (!BIO_sock_init()) return(INVALID_SOCKET);
532 if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET);
556 if (!BIO_get_port(p,&port)) return(INVALID_SOCKET);
558 memset((char *)&server,0,sizeof(server));
559 server.sin_family=AF_INET;
560 server.sin_port=htons(port);
562 if (strcmp(h,"*") == 0)
563 server.sin_addr.s_addr=INADDR_ANY;
566 if (!BIO_get_host_ip(h,&(ip[0]))) return(INVALID_SOCKET);
568 ((unsigned long)ip[0]<<24L)|
569 ((unsigned long)ip[1]<<16L)|
570 ((unsigned long)ip[2]<< 8L)|
571 ((unsigned long)ip[3]);
572 server.sin_addr.s_addr=htonl(l);
576 s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
577 if (s == INVALID_SOCKET)
579 SYSerr(SYS_F_SOCKET,get_last_socket_error());
580 ERR_add_error_data(3,"port='",host,"'");
581 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_CREATE_SOCKET);
586 if (bind_mode == BIO_BIND_REUSEADDR)
590 ret=setsockopt(s,SOL_SOCKET,SO_REUSEADDR,(char *)&i,sizeof(i));
591 bind_mode=BIO_BIND_NORMAL;
594 if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1)
597 err_num=get_last_socket_error();
598 if ((bind_mode == BIO_BIND_REUSEADDR_IF_UNUSED) &&
599 (err_num == EADDRINUSE))
601 memcpy((char *)&client,(char *)&server,sizeof(server));
602 if (strcmp(h,"*") == 0)
603 client.sin_addr.s_addr=htonl(0x7F000001);
604 cs=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL);
605 if (cs != INVALID_SOCKET)
608 ii=connect(cs,(struct sockaddr *)&client,
611 if (ii == INVALID_SOCKET)
613 bind_mode=BIO_BIND_REUSEADDR;
622 SYSerr(SYS_F_BIND,err_num);
623 ERR_add_error_data(3,"port='",host,"'");
624 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET);
627 if (listen(s,MAX_LISTEN) == -1)
629 SYSerr(SYS_F_BIND,get_last_socket_error());
630 ERR_add_error_data(3,"port='",host,"'");
631 BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET);
636 if (str != NULL) OPENSSL_free(str);
637 if ((ret == 0) && (s != INVALID_SOCKET))
645 int BIO_accept(int sock, char **addr)
647 int ret=INVALID_SOCKET;
648 static struct sockaddr_in from;
654 memset((char *)&from,0,sizeof(from));
656 /* Note: under VMS with SOCKETSHR the fourth parameter is currently
657 * of type (int *) whereas under other systems it is (void *) if
658 * you don't have a cast it will choke the compiler: if you do
659 * have a cast then you can either go for (int *) or (void *).
661 ret=accept(sock,(struct sockaddr *)&from,(void *)&len);
662 if (ret == INVALID_SOCKET)
664 SYSerr(SYS_F_ACCEPT,get_last_socket_error());
665 BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR);
669 if (addr == NULL) goto end;
671 l=ntohl(from.sin_addr.s_addr);
672 port=ntohs(from.sin_port);
675 if ((p=OPENSSL_malloc(24)) == NULL)
677 BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE);
682 sprintf(*addr,"%d.%d.%d.%d:%d",
683 (unsigned char)(l>>24L)&0xff,
684 (unsigned char)(l>>16L)&0xff,
685 (unsigned char)(l>> 8L)&0xff,
686 (unsigned char)(l )&0xff,
692 int BIO_set_tcp_ndelay(int s, int on)
695 #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP))
706 ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on));
712 int BIO_socket_nbio(int s, int mode)
719 ret=BIO_socket_ioctl(s,FIONBIO,&l);