1 #if defined(NO_BUFFER) || defined(NO_IP) || defined(NO_OPENSSL)
2 #error "Badness, NO_BUFFER, NO_IP or NO_OPENSSL is defined, turn them *off*"
5 /* Include our bits'n'pieces */
9 /********************************************/
10 /* Our local types that specify our "world" */
11 /********************************************/
13 /* These represent running "tunnels". Eg. if you wanted to do SSL in a
14 * "message-passing" scanario, the "int" file-descriptors might be replaced by
15 * thread or process IDs, and the "select" code might be replaced by message
16 * handling code. Whatever. */
17 typedef struct _tunala_item_t {
18 /* The underlying SSL state machine. This is a data-only processing unit
19 * and we communicate with it by talking to its four "buffers". */
21 /* The file-descriptors for the "dirty" (encrypted) side of the SSL
22 * setup. In actuality, this is typically a socket and both values are
24 int dirty_read, dirty_send;
25 /* The file-descriptors for the "clean" (unencrypted) side of the SSL
26 * setup. These could be stdin/stdout, a socket (both values the same),
27 * or whatever you like. */
28 int clean_read, clean_send;
31 /* This structure is used as the data for running the main loop. Namely, in a
32 * network format such as this, it is stuff for select() - but as pointed out,
33 * when moving the real-world to somewhere else, this might be replaced by
34 * something entirely different. It's basically the stuff that controls when
35 * it's time to do some "work". */
36 typedef struct _select_sets_t {
37 int max; /* As required as the first argument to select() */
38 fd_set reads, sends, excepts; /* As passed to select() */
40 typedef struct _tunala_selector_t {
41 select_sets_t last_selected; /* Results of the last select() */
42 select_sets_t next_select; /* What we'll next select on */
45 /* This structure is *everything*. We do it to avoid the use of globals so that,
46 * for example, it would be easier to shift things around between async-IO,
47 * thread-based, or multi-fork()ed (or combinations thereof). */
48 typedef struct _tunala_world_t {
49 /* The file-descriptor we "listen" on for new connections */
51 /* The array of tunnels */
52 tunala_item_t *tunnels;
53 /* the number of tunnels in use and allocated, respectively */
54 unsigned int tunnels_used, tunnels_size;
55 /* Our outside "loop" context stuff */
56 tunala_selector_t selector;
57 /* Our SSL_CTX, which is configured as the SSL client or server and has
58 * the various cert-settings and callbacks configured. */
60 /* Simple flag with complex logic :-) Indicates whether we're an SSL
61 * server or an SSL client. */
65 /*****************************/
66 /* Internal static functions */
67 /*****************************/
69 static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
70 const char *CAfile, const char *cert, const char *key,
71 const char *dcert, const char *dkey, const char *cipher_list,
72 int out_state, int out_verify, int verify_mode,
73 unsigned int verify_depth);
74 static void selector_init(tunala_selector_t *selector);
75 static void selector_add_listener(tunala_selector_t *selector, int fd);
76 static void selector_add_tunala(tunala_selector_t *selector, tunala_item_t *t);
77 static int selector_select(tunala_selector_t *selector);
78 /* This returns -1 for error, 0 for no new connections, or 1 for success, in
79 * which case *newfd is populated. */
80 static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd);
81 static int tunala_world_new_item(tunala_world_t *world, int fd,
82 const unsigned char *ip, unsigned short port);
83 static void tunala_world_del_item(tunala_world_t *world, unsigned int idx);
84 static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item);
86 /*********************************************/
87 /* MAIN FUNCTION (and its utility functions) */
88 /*********************************************/
90 static const char *def_proxyhost = "127.0.0.1:443";
91 static const char *def_listenhost = "127.0.0.1:8080";
92 static int def_max_tunnels = 50;
93 static const char *def_cacert = NULL;
94 static const char *def_cert = NULL;
95 static const char *def_key = NULL;
96 static const char *def_dcert = NULL;
97 static const char *def_dkey = NULL;
98 static const char *def_engine_id = NULL;
99 static int def_server_mode = 0;
100 static const char *def_cipher_list = NULL;
101 static int def_out_state = 0;
102 static unsigned int def_out_verify = 0;
103 static int def_verify_mode = 0;
104 static unsigned int def_verify_depth = 10;
106 static const char *helpstring =
107 "\n'Tunala' (A tunneler with a New Zealand accent)\n"
108 "Usage: tunala [options], where options are from;\n"
109 " -listen [host:]<port> (default = 127.0.0.1:8080)\n"
110 " -proxy <host>:<port> (default = 127.0.0.1:443)\n"
111 " -maxtunnels <num> (default = 50)\n"
112 " -cacert <path|NULL> (default = NULL)\n"
113 " -cert <path|NULL> (default = NULL)\n"
114 " -key <path|NULL> (default = whatever '-cert' is)\n"
115 " -dcert <path|NULL> (usually for DSA, default = NULL)\n"
116 " -dkey <path|NULL> (usually for DSA, default = whatever '-dcert' is)\n"
117 " -engine <id|NULL> (default = NULL)\n"
118 " -server <0|1> (default = 0, ie. an SSL client)\n"
119 " -cipher <list> (specifies cipher list to use)\n"
120 " -out_state (prints SSL handshake states)\n"
121 " -out_verify <0|1|2|3> (prints certificate verification states: def=1)\n"
122 " -v_peer (verify the peer certificate)\n"
123 " -v_strict (do not continue if peer doesn't authenticate)\n"
124 " -v_once (no verification in renegotiates)\n"
125 " -v_depth <num> (limit certificate chain depth, default = 10)\n"
126 " -<h|help|?> (displays this help screen)\n"
127 "NB: It is recommended to specify a cert+key when operating as an\n"
128 "SSL server. If you only specify '-cert', the same file must\n"
129 "contain a matching private key.\n";
131 static int usage(const char *errstr, int isunknownarg)
134 fprintf(stderr, "Error: unknown argument '%s'\n", errstr);
136 fprintf(stderr, "Error: %s\n", errstr);
137 fprintf(stderr, "%s\n", helpstring);
141 static int err_str0(const char *str0)
143 fprintf(stderr, str0);
144 fprintf(stderr, "\n");
148 static int err_str1(const char *str0, const char *str1)
150 fprintf(stderr, str0, str1);
151 fprintf(stderr, "\n");
155 static int parse_max_tunnels(const char *s, unsigned int *maxtunnels)
159 l = strtoul(s, &temp, 10);
160 if((temp == s) || (*temp != '\0') || (l < 1) || (l > 1024)) {
161 fprintf(stderr, "Error, '%s' is an invalid value for "
165 *maxtunnels = (unsigned int)l;
169 static int parse_server_mode(const char *s, int *servermode)
173 l = strtoul(s, &temp, 10);
174 if((temp == s) || (*temp != '\0') || (l > 1)) {
175 fprintf(stderr, "Error, '%s' is an invalid value for the "
179 *servermode = (int)l;
183 static int parse_verify_level(const char *s, unsigned int *verify_level)
187 l = strtoul(s, &temp, 10);
188 if((temp == s) || (*temp != '\0') || (l > 3)) {
189 fprintf(stderr, "Error, '%s' is an invalid value for "
193 *verify_level = (unsigned int)l;
197 static int parse_verify_depth(const char *s, unsigned int *verify_depth)
201 l = strtoul(s, &temp, 10);
202 if((temp == s) || (*temp != '\0') || (l < 1) || (l > 50)) {
203 fprintf(stderr, "Error, '%s' is an invalid value for "
204 "verify_depth\n", s);
207 *verify_depth = (unsigned int)l;
211 int main(int argc, char *argv[])
215 tunala_world_t world;
216 tunala_item_t *t_item;
217 unsigned char *proxy_ip;
218 unsigned short proxy_port;
220 const char *proxyhost = def_proxyhost;
221 const char *listenhost = def_listenhost;
222 unsigned int max_tunnels = def_max_tunnels;
223 const char *cacert = def_cacert;
224 const char *cert = def_cert;
225 const char *key = def_key;
226 const char *dcert = def_dcert;
227 const char *dkey = def_dkey;
228 const char *engine_id = def_engine_id;
229 int server_mode = def_server_mode;
230 const char *cipher_list = def_cipher_list;
231 int out_state = def_out_state;
232 unsigned int out_verify = def_out_verify;
233 int verify_mode = def_verify_mode;
234 unsigned int verify_depth = def_verify_depth;
236 /* Parse command-line arguments */
240 if(strcmp(*argv, "-listen") == 0) {
242 return usage("-listen requires an argument", 0);
246 } else if(strcmp(*argv, "-proxy") == 0) {
248 return usage("-proxy requires an argument", 0);
252 } else if(strcmp(*argv, "-maxtunnels") == 0) {
254 return usage("-maxtunnels requires an argument", 0);
256 if(!parse_max_tunnels(*argv, &max_tunnels))
259 } else if(strcmp(*argv, "-cacert") == 0) {
261 return usage("-cacert requires an argument", 0);
263 if(strcmp(*argv, "NULL") == 0)
268 } else if(strcmp(*argv, "-cert") == 0) {
270 return usage("-cert requires an argument", 0);
272 if(strcmp(*argv, "NULL") == 0)
277 } else if(strcmp(*argv, "-key") == 0) {
279 return usage("-key requires an argument", 0);
281 if(strcmp(*argv, "NULL") == 0)
286 } else if(strcmp(*argv, "-dcert") == 0) {
288 return usage("-dcert requires an argument", 0);
290 if(strcmp(*argv, "NULL") == 0)
295 } else if(strcmp(*argv, "-dkey") == 0) {
297 return usage("-dkey requires an argument", 0);
299 if(strcmp(*argv, "NULL") == 0)
304 } else if(strcmp(*argv, "-engine") == 0) {
306 return usage("-engine requires an argument", 0);
310 } else if(strcmp(*argv, "-server") == 0) {
312 return usage("-server requires an argument", 0);
314 if(!parse_server_mode(*argv, &server_mode))
317 } else if(strcmp(*argv, "-cipher") == 0) {
319 return usage("-cipher requires an argument", 0);
323 } else if(strcmp(*argv, "-out_state") == 0) {
326 } else if(strcmp(*argv, "-out_verify") == 0) {
328 return usage("-out_verify requires an argument", 0);
330 if(!parse_verify_level(*argv, &out_verify))
333 } else if(strcmp(*argv, "-v_peer") == 0) {
334 verify_mode |= SSL_VERIFY_PEER;
336 } else if(strcmp(*argv, "-v_strict") == 0) {
337 verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
339 } else if(strcmp(*argv, "-v_once") == 0) {
340 verify_mode |= SSL_VERIFY_CLIENT_ONCE;
342 } else if(strcmp(*argv, "-v_depth") == 0) {
344 return usage("-v_depth requires an argument", 0);
346 if(!parse_verify_depth(*argv, &verify_depth))
349 } else if((strcmp(*argv, "-h") == 0) ||
350 (strcmp(*argv, "-help") == 0) ||
351 (strcmp(*argv, "-?") == 0)) {
352 fprintf(stderr, "%s\n", helpstring);
355 return usage(*argv, 1);
358 /* Initialise network stuff */
360 return err_str0("ip_initialise failed");
361 err_str0("ip_initialise succeeded");
362 /* Create the SSL_CTX */
363 if((world.ssl_ctx = initialise_ssl_ctx(server_mode, engine_id,
364 cacert, cert, key, dcert, dkey, cipher_list, out_state,
365 out_verify, verify_mode, verify_depth)) == NULL)
366 return err_str1("initialise_ssl_ctx(engine_id=%s) failed",
367 (engine_id == NULL) ? "NULL" : engine_id);
368 err_str1("initialise_ssl_ctx(engine_id=%s) succeeded",
369 (engine_id == NULL) ? "NULL" : engine_id);
370 /* Create the listener */
371 if((world.listen_fd = ip_create_listener(listenhost)) == -1)
372 return err_str1("ip_create_listener(%s) failed", listenhost);
373 err_str1("ip_create_listener(%s) succeeded", listenhost);
374 if(!ip_parse_address(proxyhost, &proxy_ip, &proxy_port, 0))
375 return err_str1("ip_parse_address(%s) failed", proxyhost);
376 err_str1("ip_parse_address(%s) succeeded", proxyhost);
377 fprintf(stderr, "Info - proxying to %d.%d.%d.%d:%d\n",
378 (int)proxy_ip[0], (int)proxy_ip[1],
379 (int)proxy_ip[2], (int)proxy_ip[3], (int)proxy_port);
380 fprintf(stderr, "Info - set maxtunnels to %d\n", (int)max_tunnels);
381 fprintf(stderr, "Info - set to operate as an SSL %s\n",
382 (server_mode ? "server" : "client"));
383 /* Initialise the rest of the stuff */
384 world.tunnels_used = world.tunnels_size = 0;
385 world.tunnels = NULL;
386 world.server_mode = server_mode;
387 selector_init(&world.selector);
389 /* We're ready to loop */
391 /* Should we listen for *new* tunnels? */
392 if(world.tunnels_used < max_tunnels)
393 selector_add_listener(&world.selector, world.listen_fd);
394 /* We should add in our existing tunnels */
395 for(loop = 0; loop < world.tunnels_used; loop++)
396 selector_add_tunala(&world.selector, world.tunnels + loop);
397 /* Now do the select */
398 switch(selector_select(&world.selector)) {
400 fprintf(stderr, "selector_select returned a badness error.\n");
403 fprintf(stderr, "Warn, selector_select returned 0 - signal??\n");
408 /* Accept new connection if we should and can */
409 if((world.tunnels_used < max_tunnels) && (selector_get_listener(
410 &world.selector, world.listen_fd,
412 /* We have a new connection */
413 if(!tunala_world_new_item(&world, newfd,
414 proxy_ip, proxy_port))
415 fprintf(stderr, "tunala_world_new_item failed\n");
417 fprintf(stderr, "Info, new tunnel opened, now up to "
418 "%d\n", world.tunnels_used);
420 /* Give each tunnel its moment, note the while loop is because it makes
421 * the logic easier than with "for" to deal with an array that may shift
422 * because of deletes. */
424 t_item = world.tunnels;
425 while(loop < world.tunnels_used) {
426 if(!tunala_item_io(&world.selector, t_item)) {
427 /* We're closing whether for reasons of an error or a
428 * natural close. Don't increment loop or t_item because
429 * the next item is moving to us! */
430 tunala_world_del_item(&world, loop);
431 fprintf(stderr, "Info, tunnel closed, down to %d\n",
435 /* Move to the next item */
441 /* Should never get here */
450 static int ctx_set_cert(SSL_CTX *ctx, const char *cert, const char *key)
454 EVP_PKEY *pkey = NULL;
455 int toret = 0; /* Assume an error */
459 if((fp = fopen(cert, "r")) == NULL) {
460 fprintf(stderr, "Error opening cert file '%s'\n", cert);
463 if(!PEM_read_X509(fp, &x509, NULL, NULL)) {
464 fprintf(stderr, "Error reading PEM cert from '%s'\n",
468 if(!SSL_CTX_use_certificate(ctx, x509)) {
469 fprintf(stderr, "Error, cert in '%s' can not be used\n",
473 /* Clear the FILE* for reuse in the "key" code */
476 fprintf(stderr, "Info, operating with cert in '%s'\n", cert);
477 /* If a cert was given without matching key, we assume the same
478 * file contains the required key. */
483 fprintf(stderr, "Error, can't specify a key without a "
484 "corresponding certificate\n");
486 fprintf(stderr, "Error, ctx_set_cert called with "
492 if((fp = fopen(key, "r")) == NULL) {
493 fprintf(stderr, "Error opening key file '%s'\n", key);
496 if(!PEM_read_PrivateKey(fp, &pkey, NULL, NULL)) {
497 fprintf(stderr, "Error reading PEM key from '%s'\n",
501 if(!SSL_CTX_use_PrivateKey(ctx, pkey)) {
502 fprintf(stderr, "Error, key in '%s' can not be used\n",
506 fprintf(stderr, "Info, operating with key in '%s'\n", key);
508 fprintf(stderr, "Info, operating without a cert or key\n");
520 static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
521 const char *CAfile, const char *cert, const char *key,
522 const char *dcert, const char *dkey, const char *cipher_list,
523 int out_state, int out_verify, int verify_mode,
524 unsigned int verify_depth)
526 SSL_CTX *ctx, *ret = NULL;
530 OpenSSL_add_ssl_algorithms();
531 SSL_load_error_strings();
533 meth = (server_mode ? SSLv23_server_method() : SSLv23_client_method());
537 if((e = ENGINE_by_id(engine_id)) == NULL) {
538 fprintf(stderr, "Error obtaining '%s' engine, openssl "
539 "errors follow\n", engine_id);
542 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
543 fprintf(stderr, "Error assigning '%s' engine, openssl "
544 "errors follow\n", engine_id);
549 if((ctx = SSL_CTX_new(meth)) == NULL)
553 if(!X509_STORE_load_locations(SSL_CTX_get_cert_store(ctx),
555 fprintf(stderr, "Error loading CA cert(s) in '%s'\n",
559 fprintf(stderr, "Info, operating with CA cert(s) in '%s'\n",
562 fprintf(stderr, "Info, operating without a CA cert(-list)\n");
563 if(!SSL_CTX_set_default_verify_paths(ctx)) {
564 fprintf(stderr, "Error setting default verify paths\n");
569 if((cert || key) && !ctx_set_cert(ctx, cert, key))
572 if((dcert || dkey) && !ctx_set_cert(ctx, dcert, dkey))
577 if(!SSL_CTX_set_cipher_list(ctx, cipher_list)) {
578 fprintf(stderr, "Error setting cipher list '%s'\n",
582 fprintf(stderr, "Info, set cipher list '%s'\n", cipher_list);
584 fprintf(stderr, "Info, operating with default cipher list\n");
586 /* out_state (output of SSL handshake states to screen). */
588 cb_ssl_info_set_output(stderr);
592 cb_ssl_verify_set_output(stderr);
593 cb_ssl_verify_set_level(out_verify);
597 cb_ssl_verify_set_depth(verify_depth);
599 /* Success! (includes setting verify_mode) */
600 SSL_CTX_set_info_callback(ctx, cb_ssl_info);
601 SSL_CTX_set_verify(ctx, verify_mode, cb_ssl_verify);
605 ERR_print_errors_fp(stderr);
616 static void selector_sets_init(select_sets_t *s)
621 FD_ZERO(&s->excepts);
623 static void selector_init(tunala_selector_t *selector)
625 selector_sets_init(&selector->last_selected);
626 selector_sets_init(&selector->next_select);
629 #define SEL_EXCEPTS 0x00
630 #define SEL_READS 0x01
631 #define SEL_SENDS 0x02
632 static void selector_add_raw_fd(tunala_selector_t *s, int fd, int flags)
634 FD_SET(fd, &s->next_select.excepts);
635 if(flags & SEL_READS)
636 FD_SET(fd, &s->next_select.reads);
637 if(flags & SEL_SENDS)
638 FD_SET(fd, &s->next_select.sends);
640 if(s->next_select.max < (fd + 1))
641 s->next_select.max = fd + 1;
644 static void selector_add_listener(tunala_selector_t *selector, int fd)
646 selector_add_raw_fd(selector, fd, SEL_READS);
649 static void selector_add_tunala(tunala_selector_t *s, tunala_item_t *t)
651 /* Set clean read if sm.clean_in is not full */
652 if(t->clean_read != -1) {
653 selector_add_raw_fd(s, t->clean_read,
654 (buffer_full(state_machine_get_buffer(&t->sm,
655 SM_CLEAN_IN)) ? SEL_EXCEPTS : SEL_READS));
657 /* Set clean send if sm.clean_out is not empty */
658 if(t->clean_send != -1) {
659 selector_add_raw_fd(s, t->clean_send,
660 (buffer_empty(state_machine_get_buffer(&t->sm,
661 SM_CLEAN_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
663 /* Set dirty read if sm.dirty_in is not full */
664 if(t->dirty_read != -1) {
665 selector_add_raw_fd(s, t->dirty_read,
666 (buffer_full(state_machine_get_buffer(&t->sm,
667 SM_DIRTY_IN)) ? SEL_EXCEPTS : SEL_READS));
669 /* Set dirty send if sm.dirty_out is not empty */
670 if(t->dirty_send != -1) {
671 selector_add_raw_fd(s, t->dirty_send,
672 (buffer_empty(state_machine_get_buffer(&t->sm,
673 SM_DIRTY_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
677 static int selector_select(tunala_selector_t *selector)
679 memcpy(&selector->last_selected, &selector->next_select,
680 sizeof(select_sets_t));
681 selector_sets_init(&selector->next_select);
682 return select(selector->last_selected.max,
683 &selector->last_selected.reads,
684 &selector->last_selected.sends,
685 &selector->last_selected.excepts, NULL);
688 /* This returns -1 for error, 0 for no new connections, or 1 for success, in
689 * which case *newfd is populated. */
690 static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd)
692 if(FD_ISSET(fd, &selector->last_selected.excepts))
694 if(!FD_ISSET(fd, &selector->last_selected.reads))
696 if((*newfd = ip_accept_connection(fd)) == -1)
701 /************************/
702 /* "Tunala" world stuff */
703 /************************/
705 static int tunala_world_make_room(tunala_world_t *world)
707 unsigned int newsize;
708 tunala_item_t *newarray;
710 if(world->tunnels_used < world->tunnels_size)
712 newsize = (world->tunnels_size == 0 ? 16 :
713 ((world->tunnels_size * 3) / 2));
714 if((newarray = malloc(newsize * sizeof(tunala_item_t))) == NULL)
716 memset(newarray, 0, newsize * sizeof(tunala_item_t));
717 if(world->tunnels_used > 0)
718 memcpy(newarray, world->tunnels,
719 world->tunnels_used * sizeof(tunala_item_t));
720 if(world->tunnels_size > 0)
721 free(world->tunnels);
723 world->tunnels = newarray;
724 world->tunnels_size = newsize;
728 static int tunala_world_new_item(tunala_world_t *world, int fd,
729 const unsigned char *ip, unsigned short port)
735 if(!tunala_world_make_room(world))
737 if((new_ssl = SSL_new(world->ssl_ctx)) == NULL) {
738 fprintf(stderr, "Error creating new SSL\n");
739 ERR_print_errors_fp(stderr);
742 item = world->tunnels + (world->tunnels_used++);
743 state_machine_init(&item->sm);
744 item->clean_read = item->clean_send =
745 item->dirty_read = item->dirty_send = -1;
746 if((newfd = ip_create_connection_split(ip, port)) == -1)
748 /* Which way round? If we're a server, "fd" is the dirty side and the
749 * connection we open is the clean one. For a client, it's the other way
751 if(world->server_mode) {
752 item->dirty_read = item->dirty_send = fd;
753 item->clean_read = item->clean_send = newfd;
755 item->clean_read = item->clean_send = fd;
756 item->dirty_read = item->dirty_send = newfd;
758 /* We use the SSL's "app_data" to indicate a call-back induced "kill" */
759 SSL_set_app_data(new_ssl, NULL);
760 if(!state_machine_set_SSL(&item->sm, new_ssl, world->server_mode))
764 tunala_world_del_item(world, world->tunnels_used - 1);
769 static void tunala_world_del_item(tunala_world_t *world, unsigned int idx)
771 tunala_item_t *item = world->tunnels + idx;
772 if(item->clean_read != -1)
773 close(item->clean_read);
774 if(item->clean_send != item->clean_read)
775 close(item->clean_send);
776 item->clean_read = item->clean_send = -1;
777 if(item->dirty_read != -1)
778 close(item->dirty_read);
779 if(item->dirty_send != item->dirty_read)
780 close(item->dirty_send);
781 item->dirty_read = item->dirty_send = -1;
782 state_machine_close(&item->sm);
783 /* OK, now we fix the item array */
784 if(idx + 1 < world->tunnels_used)
785 /* We need to scroll entries to the left */
786 memmove(world->tunnels + idx,
787 world->tunnels + (idx + 1),
788 (world->tunnels_used - (idx + 1)) *
789 sizeof(tunala_item_t));
790 world->tunnels_used--;
793 static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item)
795 int c_r, c_s, d_r, d_s; /* Four boolean flags */
797 /* Take ourselves out of the gene-pool if there was an except */
798 if((item->clean_read != -1) && FD_ISSET(item->clean_read,
799 &selector->last_selected.excepts))
801 if((item->clean_send != -1) && FD_ISSET(item->clean_send,
802 &selector->last_selected.excepts))
804 if((item->dirty_read != -1) && FD_ISSET(item->dirty_read,
805 &selector->last_selected.excepts))
807 if((item->dirty_send != -1) && FD_ISSET(item->dirty_send,
808 &selector->last_selected.excepts))
810 /* Grab our 4 IO flags */
811 c_r = c_s = d_r = d_s = 0;
812 if(item->clean_read != -1)
813 c_r = FD_ISSET(item->clean_read, &selector->last_selected.reads);
814 if(item->clean_send != -1)
815 c_s = FD_ISSET(item->clean_send, &selector->last_selected.sends);
816 if(item->dirty_read != -1)
817 d_r = FD_ISSET(item->dirty_read, &selector->last_selected.reads);
818 if(item->dirty_send != -1)
819 d_s = FD_ISSET(item->dirty_send, &selector->last_selected.sends);
820 /* If no IO has happened for us, skip needless data looping */
821 if(!c_r && !c_s && !d_r && !d_s)
824 c_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
825 SM_CLEAN_IN), item->clean_read) <= 0);
827 c_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
828 SM_CLEAN_OUT), item->clean_send) <= 0);
830 d_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
831 SM_DIRTY_IN), item->dirty_read) <= 0);
833 d_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
834 SM_DIRTY_OUT), item->dirty_send) <= 0);
835 /* If any of the flags is non-zero, that means they need closing */
837 close(item->clean_read);
838 if(item->clean_send == item->clean_read)
839 item->clean_send = -1;
840 item->clean_read = -1;
842 if(c_s && (item->clean_send != -1)) {
843 close(item->clean_send);
844 if(item->clean_send == item->clean_read)
845 item->clean_read = -1;
846 item->clean_send = -1;
849 close(item->dirty_read);
850 if(item->dirty_send == item->dirty_read)
851 item->dirty_send = -1;
852 item->dirty_read = -1;
854 if(d_s && (item->dirty_send != -1)) {
855 close(item->dirty_send);
856 if(item->dirty_send == item->dirty_read)
857 item->dirty_read = -1;
858 item->dirty_send = -1;
860 /* This function name is attributed to the term donated by David
861 * Schwartz on openssl-dev, message-ID:
862 * <NCBBLIEPOCNJOAEKBEAKEEDGLIAA.davids@webmaster.com>. :-) */
863 if(!state_machine_churn(&item->sm))
864 /* If the SSL closes, it will also zero-out the _in buffers
865 * and will in future process just outgoing data. As and
866 * when the outgoing data has gone, it will return zero
867 * here to tell us to bail out. */
869 /* Otherwise, we return zero if both sides are dead. */
870 if(((item->clean_read == -1) || (item->clean_send == -1)) &&
871 ((item->dirty_read == -1) || (item->dirty_send == -1)))
873 /* If only one side closed, notify the SSL of this so it can take
874 * appropriate action. */
875 if((item->clean_read == -1) || (item->clean_send == -1)) {
876 if(!state_machine_close_clean(&item->sm))
879 if((item->dirty_read == -1) || (item->dirty_send == -1)) {
880 if(!state_machine_close_dirty(&item->sm))