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1 | /* crypto/bio/b_sock.c */ |
2 | /* Copyright (C) 1995-1997 Eric Young (eay@cryptsoft.com) | |
3 | * All rights reserved. | |
4 | * | |
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. | |
8 | * | |
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). | |
15 | * | |
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. | |
22 | * | |
23 | * Redistribution and use in source and binary forms, with or without | |
24 | * modification, are permitted provided that the following conditions | |
25 | * are met: | |
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)" | |
40 | * | |
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 | |
51 | * SUCH DAMAGE. | |
52 | * | |
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.] | |
57 | */ | |
58 | ||
59 | #ifndef NO_SOCK | |
60 | ||
61 | #include <stdio.h> | |
62 | #include <errno.h> | |
63 | #define USE_SOCKETS | |
64 | #include "cryptlib.h" | |
65 | #include "bio.h" | |
66 | ||
67 | /* BIOerr(BIO_F_WSASTARTUP,BIO_R_WSASTARTUP ); */ | |
68 | ||
69 | #ifdef WIN16 | |
70 | #define SOCKET_PROTOCOL 0 /* more microsoft stupidity */ | |
71 | #else | |
72 | #define SOCKET_PROTOCOL IPPROTO_TCP | |
73 | #endif | |
74 | ||
75 | #ifdef WINDOWS | |
76 | static int wsa_init_done=0; | |
77 | #endif | |
78 | ||
79 | unsigned long BIO_ghbn_hits=0L; | |
80 | unsigned long BIO_ghbn_miss=0L; | |
81 | ||
82 | #ifndef NOPROTO | |
83 | static int get_ip(char *str,unsigned char *ip); | |
84 | #else | |
85 | static int get_ip(); | |
86 | #endif | |
87 | ||
88 | int BIO_get_host_ip(str,ip) | |
89 | char *str; | |
90 | unsigned char *ip; | |
91 | { | |
92 | int i; | |
93 | struct hostent *he; | |
94 | ||
95 | i=get_ip(str,ip); | |
96 | if (i > 0) return(1); | |
97 | if (i < 0) | |
98 | { | |
99 | BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_INVALID_IP_ADDRESS); | |
100 | return(0); | |
101 | } | |
102 | else | |
103 | { /* do a gethostbyname */ | |
104 | if (!BIO_sock_init()) return(0); | |
105 | ||
106 | he=BIO_gethostbyname(str); | |
107 | if (he == NULL) | |
108 | { | |
109 | BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_BAD_HOSTNAME_LOOKUP); | |
110 | return(0); | |
111 | } | |
112 | ||
113 | /* cast to short because of win16 winsock definition */ | |
114 | if ((short)he->h_addrtype != AF_INET) | |
115 | { | |
116 | BIOerr(BIO_F_BIO_GET_HOST_IP,BIO_R_GETHOSTBYNAME_ADDR_IS_NOT_AF_INET); | |
117 | return(0); | |
118 | } | |
119 | for (i=0; i<4; i++) | |
120 | ip[i]=he->h_addr_list[0][i]; | |
121 | } | |
122 | return(1); | |
123 | } | |
124 | ||
125 | int BIO_get_port(str,port_ptr) | |
126 | char *str; | |
127 | short *port_ptr; | |
128 | { | |
129 | int i; | |
130 | struct servent *s; | |
131 | ||
132 | if (str == NULL) | |
133 | { | |
134 | BIOerr(BIO_F_BIO_GET_PORT,BIO_R_NO_PORT_DEFINED); | |
135 | return(0); | |
136 | } | |
137 | i=atoi(str); | |
138 | if (i != 0) | |
139 | *port_ptr=(unsigned short)i; | |
140 | else | |
141 | { | |
142 | s=getservbyname(str,"tcp"); | |
143 | if (s == NULL) | |
144 | { | |
145 | if (strcmp(str,"http") == 0) | |
146 | *port_ptr=80; | |
147 | else if (strcmp(str,"telnet") == 0) | |
148 | *port_ptr=23; | |
149 | else if (strcmp(str,"socks") == 0) | |
150 | *port_ptr=1080; | |
151 | else if (strcmp(str,"https") == 0) | |
152 | *port_ptr=443; | |
153 | else if (strcmp(str,"ssl") == 0) | |
154 | *port_ptr=443; | |
155 | else if (strcmp(str,"ftp") == 0) | |
156 | *port_ptr=21; | |
157 | else if (strcmp(str,"gopher") == 0) | |
158 | *port_ptr=70; | |
159 | #if 0 | |
160 | else if (strcmp(str,"wais") == 0) | |
161 | *port_ptr=21; | |
162 | #endif | |
163 | else | |
164 | { | |
165 | SYSerr(SYS_F_GETSERVBYNAME,errno); | |
166 | return(0); | |
167 | } | |
168 | return(1); | |
169 | } | |
170 | *port_ptr=htons((unsigned short)s->s_port); | |
171 | } | |
172 | return(1); | |
173 | } | |
174 | ||
175 | int BIO_sock_error(sock) | |
176 | int sock; | |
177 | { | |
178 | int j,i,size; | |
179 | ||
180 | size=sizeof(int); | |
181 | ||
182 | i=getsockopt(sock,SOL_SOCKET,SO_ERROR,(char *)&j,&size); | |
183 | if (i < 0) | |
184 | return(1); | |
185 | else | |
186 | return(j); | |
187 | } | |
188 | ||
189 | #define GHBN_NUM 4 | |
190 | static struct ghbn_cache_st | |
191 | { | |
192 | char name[128]; | |
193 | struct hostent ent; | |
194 | unsigned long order; | |
195 | } ghbn_cache[GHBN_NUM]; | |
196 | ||
197 | struct hostent *BIO_gethostbyname(name) | |
198 | char *name; | |
199 | { | |
200 | struct hostent *ret; | |
201 | int i,lowi=0; | |
202 | unsigned long low= (unsigned long)-1; | |
203 | ||
204 | CRYPTO_w_lock(CRYPTO_LOCK_BIO_GETHOSTBYNAME); | |
205 | if (strlen(name) < 128) | |
206 | { | |
207 | for (i=0; i<GHBN_NUM; i++) | |
208 | { | |
209 | if (low > ghbn_cache[i].order) | |
210 | { | |
211 | low=ghbn_cache[i].order; | |
212 | lowi=i; | |
213 | } | |
214 | if (ghbn_cache[i].order > 0) | |
215 | { | |
216 | if (strncmp(name,ghbn_cache[i].name,128) == 0) | |
217 | break; | |
218 | } | |
219 | } | |
220 | } | |
221 | else | |
222 | i=GHBN_NUM; | |
223 | ||
224 | if (i == GHBN_NUM) /* no hit*/ | |
225 | { | |
226 | BIO_ghbn_miss++; | |
227 | ret=gethostbyname(name); | |
228 | if (ret == NULL) return(NULL); | |
229 | /* else add to cache */ | |
230 | strncpy(ghbn_cache[lowi].name,name,128); | |
231 | memcpy((char *)&(ghbn_cache[lowi].ent),ret,sizeof(struct hostent)); | |
232 | ghbn_cache[lowi].order=BIO_ghbn_miss+BIO_ghbn_hits; | |
233 | } | |
234 | else | |
235 | { | |
236 | BIO_ghbn_hits++; | |
237 | ret= &(ghbn_cache[i].ent); | |
238 | ghbn_cache[i].order=BIO_ghbn_miss+BIO_ghbn_hits; | |
239 | } | |
240 | CRYPTO_w_unlock(CRYPTO_LOCK_BIO_GETHOSTBYNAME); | |
241 | return(ret); | |
242 | } | |
243 | ||
244 | int BIO_sock_init() | |
245 | { | |
246 | #ifdef WINDOWS | |
247 | static struct WSAData wsa_state; | |
248 | ||
249 | if (!wsa_init_done) | |
250 | { | |
251 | int err; | |
252 | ||
253 | #ifdef SIGINT | |
254 | signal(SIGINT,(void (*)(int))BIO_sock_cleanup); | |
255 | #endif | |
256 | wsa_init_done=1; | |
257 | memset(&wsa_state,0,sizeof(wsa_state)); | |
258 | if (WSAStartup(0x0101,&wsa_state)!=0) | |
259 | { | |
260 | err=WSAGetLastError(); | |
261 | SYSerr(SYS_F_WSASTARTUP,err); | |
262 | BIOerr(BIO_F_BIO_SOCK_INIT,BIO_R_WSASTARTUP); | |
263 | return(-1); | |
264 | } | |
265 | } | |
266 | #endif /* WINDOWS */ | |
267 | return(1); | |
268 | } | |
269 | ||
270 | void BIO_sock_cleanup() | |
271 | { | |
272 | #ifdef WINDOWS | |
273 | if (wsa_init_done) | |
274 | { | |
275 | wsa_init_done=0; | |
276 | WSACancelBlockingCall(); | |
277 | WSACleanup(); | |
278 | } | |
279 | #endif | |
280 | } | |
281 | ||
282 | int BIO_socket_ioctl(fd,type,arg) | |
283 | int fd; | |
284 | long type; | |
285 | unsigned long *arg; | |
286 | { | |
287 | int i,err; | |
288 | ||
289 | #ifdef WINDOWS | |
290 | i=ioctlsocket(fd,type,arg); | |
291 | #else | |
292 | i=ioctl(fd,type,arg); | |
293 | #endif | |
294 | if (i < 0) | |
295 | { | |
296 | #ifdef WINDOWS | |
297 | err=WSAGetLastError(); | |
298 | #else | |
299 | err=errno; | |
300 | #endif | |
301 | SYSerr(SYS_F_IOCTLSOCKET,err); | |
302 | } | |
303 | return(i); | |
304 | } | |
305 | ||
306 | /* The reason I have implemented this instead of using sscanf is because | |
307 | * Visual C 1.52c gives an unresolved external when linking a DLL :-( */ | |
308 | static int get_ip(str,ip) | |
309 | char *str; | |
310 | unsigned char ip[4]; | |
311 | { | |
312 | unsigned int tmp[4]; | |
313 | int num=0,c,ok=0; | |
314 | ||
315 | tmp[0]=tmp[1]=tmp[2]=tmp[3]=0; | |
316 | ||
317 | for (;;) | |
318 | { | |
319 | c= *(str++); | |
320 | if ((c >= '0') && (c <= '9')) | |
321 | { | |
322 | ok=1; | |
323 | tmp[num]=tmp[num]*10+c-'0'; | |
324 | if (tmp[num] > 255) return(-1); | |
325 | } | |
326 | else if (c == '.') | |
327 | { | |
328 | if (!ok) return(-1); | |
329 | if (num == 3) break; | |
330 | num++; | |
331 | ok=0; | |
332 | } | |
333 | else if ((num == 3) && ok) | |
334 | break; | |
335 | else | |
336 | return(0); | |
337 | } | |
338 | ip[0]=tmp[0]; | |
339 | ip[1]=tmp[1]; | |
340 | ip[2]=tmp[2]; | |
341 | ip[3]=tmp[3]; | |
342 | return(1); | |
343 | } | |
344 | ||
345 | int BIO_get_accept_socket(host) | |
346 | char *host; | |
347 | { | |
348 | int ret=0; | |
349 | struct sockaddr_in server; | |
350 | int s= -1; | |
351 | unsigned char ip[4]; | |
352 | short port; | |
353 | char *str,*h,*p,*e; | |
354 | unsigned long l; | |
355 | ||
356 | if (!BIO_sock_init()) return(INVALID_SOCKET); | |
357 | ||
358 | if ((str=BUF_strdup(host)) == NULL) return(INVALID_SOCKET); | |
359 | ||
360 | h=p=NULL; | |
361 | h=str; | |
362 | for (e=str; *e; e++) | |
363 | { | |
364 | if (*e == ':') | |
365 | { | |
366 | p= &(e[1]); | |
367 | *e='\0'; | |
368 | } | |
369 | else if (*e == '/') | |
370 | { | |
371 | *e='\0'; | |
372 | break; | |
373 | } | |
374 | } | |
375 | ||
376 | if (p == NULL) | |
377 | { | |
378 | p=h; | |
379 | h="*"; | |
380 | } | |
381 | ||
382 | if (!BIO_get_port(p,&port)) return(INVALID_SOCKET); | |
383 | ||
384 | memset((char *)&server,0,sizeof(server)); | |
385 | server.sin_family=AF_INET; | |
386 | server.sin_port=htons((unsigned short)port); | |
387 | ||
388 | if (strcmp(h,"*") == 0) | |
389 | server.sin_addr.s_addr=INADDR_ANY; | |
390 | else | |
391 | { | |
392 | if (!BIO_get_host_ip(h,&(ip[0]))) return(INVALID_SOCKET); | |
393 | l=(unsigned long) | |
394 | ((unsigned long)ip[0]<<24L)| | |
395 | ((unsigned long)ip[0]<<16L)| | |
396 | ((unsigned long)ip[0]<< 8L)| | |
397 | ((unsigned long)ip[0]); | |
398 | server.sin_addr.s_addr=htonl(l); | |
399 | } | |
400 | ||
401 | s=socket(AF_INET,SOCK_STREAM,SOCKET_PROTOCOL); | |
402 | if (s == INVALID_SOCKET) | |
403 | { | |
404 | #ifdef WINDOWS | |
405 | errno=WSAGetLastError(); | |
406 | #endif | |
407 | SYSerr(SYS_F_SOCKET,errno); | |
408 | BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET); | |
409 | goto err; | |
410 | } | |
411 | if (bind(s,(struct sockaddr *)&server,sizeof(server)) == -1) | |
412 | { | |
413 | #ifdef WINDOWS | |
414 | errno=WSAGetLastError(); | |
415 | #endif | |
416 | SYSerr(SYS_F_BIND,errno); | |
417 | BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_BIND_SOCKET); | |
418 | goto err; | |
419 | } | |
420 | if (listen(s,5) == -1) | |
421 | { | |
422 | #ifdef WINDOWS | |
423 | errno=WSAGetLastError(); | |
424 | #endif | |
425 | SYSerr(SYS_F_LISTEN,errno); | |
426 | BIOerr(BIO_F_BIO_GET_ACCEPT_SOCKET,BIO_R_UNABLE_TO_LISTEN_SOCKET); | |
427 | goto err; | |
428 | } | |
429 | ret=1; | |
430 | err: | |
431 | if (str != NULL) Free(str); | |
432 | if ((ret == 0) && (s != INVALID_SOCKET)) | |
433 | { | |
434 | #ifdef WINDOWS | |
435 | closesocket(s); | |
436 | #else | |
437 | close(s); | |
438 | #endif | |
439 | s= INVALID_SOCKET; | |
440 | } | |
441 | return(s); | |
442 | } | |
443 | ||
444 | int BIO_accept(sock,addr) | |
445 | int sock; | |
446 | char **addr; | |
447 | { | |
448 | int ret=INVALID_SOCKET; | |
449 | static struct sockaddr_in from; | |
450 | unsigned long l; | |
451 | short port; | |
452 | int len; | |
453 | char *p; | |
454 | ||
455 | memset((char *)&from,0,sizeof(from)); | |
456 | len=sizeof(from); | |
457 | ret=accept(sock,(struct sockaddr *)&from,&len); | |
458 | if (ret == INVALID_SOCKET) | |
459 | { | |
460 | #ifdef WINDOWS | |
461 | errno=WSAGetLastError(); | |
462 | #endif | |
463 | SYSerr(SYS_F_ACCEPT,errno); | |
464 | BIOerr(BIO_F_BIO_ACCEPT,BIO_R_ACCEPT_ERROR); | |
465 | goto end; | |
466 | } | |
467 | ||
468 | if (addr == NULL) goto end; | |
469 | ||
470 | l=ntohl(from.sin_addr.s_addr); | |
471 | port=ntohs(from.sin_port); | |
472 | if (*addr == NULL) | |
473 | { | |
474 | if ((p=Malloc(24)) == NULL) | |
475 | { | |
476 | BIOerr(BIO_F_BIO_ACCEPT,ERR_R_MALLOC_FAILURE); | |
477 | goto end; | |
478 | } | |
479 | *addr=p; | |
480 | } | |
481 | sprintf(*addr,"%d.%d.%d.%d:%d", | |
482 | (unsigned char)(l>>24L)&0xff, | |
483 | (unsigned char)(l>>16L)&0xff, | |
484 | (unsigned char)(l>> 8L)&0xff, | |
485 | (unsigned char)(l )&0xff, | |
486 | port); | |
487 | end: | |
488 | return(ret); | |
489 | } | |
490 | ||
491 | int BIO_set_tcp_ndelay(s,on) | |
492 | int s; | |
493 | int on; | |
494 | { | |
495 | int ret=0; | |
496 | #if defined(TCP_NODELAY) && (defined(IPPROTO_TCP) || defined(SOL_TCP)) | |
497 | int opt; | |
498 | ||
499 | #ifdef SOL_TCP | |
500 | opt=SOL_TCP; | |
501 | #else | |
502 | #ifdef IPPROTO_TCP | |
503 | opt=IPPROTO_TCP; | |
504 | #endif | |
505 | #endif | |
506 | ||
507 | ret=setsockopt(s,opt,TCP_NODELAY,(char *)&on,sizeof(on)); | |
508 | #endif | |
509 | return(ret == 0); | |
510 | } | |
511 | #endif | |
512 |