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 *cipher_list, int out_state, int out_verify,
73 static void selector_init(tunala_selector_t *selector);
74 static void selector_add_listener(tunala_selector_t *selector, int fd);
75 static void selector_add_tunala(tunala_selector_t *selector, tunala_item_t *t);
76 static int selector_select(tunala_selector_t *selector);
77 /* This returns -1 for error, 0 for no new connections, or 1 for success, in
78 * which case *newfd is populated. */
79 static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd);
80 static int tunala_world_new_item(tunala_world_t *world, int fd,
81 const unsigned char *ip, unsigned short port);
82 static void tunala_world_del_item(tunala_world_t *world, unsigned int idx);
83 static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item);
85 /*********************************************/
86 /* MAIN FUNCTION (and its utility functions) */
87 /*********************************************/
89 static const char *def_proxyhost = "127.0.0.1:443";
90 static const char *def_listenhost = "127.0.0.1:8080";
91 static int def_max_tunnels = 50;
92 static const char *def_cacert = NULL;
93 static const char *def_cert = NULL;
94 static const char *def_key = NULL;
95 static const char *def_engine_id = NULL;
96 static int def_server_mode = 0;
97 static const char *def_cipher_list = NULL;
98 static int def_out_state = 0;
99 static int def_out_verify = 0;
100 static int def_verify_mode = 0;
102 static const char *helpstring =
103 "\n'Tunala' (A tunneler with a New Zealand accent)\n"
104 "Usage: tunala [options], where options are from;\n"
105 " -listen [host:]<port> (default = 127.0.0.1:8080)\n"
106 " -proxy <host>:<port> (default = 127.0.0.1:443)\n"
107 " -maxtunnels <num> (default = 50)\n"
108 " -cacert <path|NULL> (default = NULL)\n"
109 " -cert <path|NULL> (default = NULL)\n"
110 " -key <path|NULL> (default = whatever '-cert' is)\n"
111 " -engine <id|NULL> (default = NULL)\n"
112 " -server <0|1> (default = 0, ie. an SSL client)\n"
113 " -cipher <list> (specifies cipher list to use)\n"
114 " -out_state (prints SSL handshake states)\n"
115 " -out_verify (prints certificate verification states)\n"
116 " -v_peer (verify the peer certificate)\n"
117 " -v_strict (do not continue if peer validation fails)\n"
118 " -v_once (no verification in renegotiates)\n"
119 " -<h|help|?> (displays this help screen)\n"
120 "NB: It is recommended to specify a cert+key when operating as an\n"
121 "SSL server. If you only specify '-cert', the same file must\n"
122 "contain a matching private key.\n";
124 static int usage(const char *errstr, int isunknownarg)
127 fprintf(stderr, "Error: unknown argument '%s'\n", errstr);
129 fprintf(stderr, "Error: %s\n", errstr);
130 fprintf(stderr, "%s\n", helpstring);
134 static int err_str0(const char *str0)
136 fprintf(stderr, str0);
137 fprintf(stderr, "\n");
141 static int err_str1(const char *str0, const char *str1)
143 fprintf(stderr, str0, str1);
144 fprintf(stderr, "\n");
148 static int parse_max_tunnels(const char *s, unsigned int *maxtunnels)
152 l = strtoul(s, &temp, 10);
153 if((temp == s) || (*temp != '\0') || (l < 1) || (l > 1024)) {
154 fprintf(stderr, "Error, '%s' is an invalid value for "
158 *maxtunnels = (unsigned int)l;
162 static int parse_server_mode(const char *s, int *servermode)
166 l = strtoul(s, &temp, 10);
167 if((temp == s) || (*temp != '\0') || (l > 1)) {
168 fprintf(stderr, "Error, '%s' is an invalid value for the "
172 *servermode = (int)l;
176 int main(int argc, char *argv[])
180 tunala_world_t world;
181 tunala_item_t *t_item;
182 unsigned char *proxy_ip;
183 unsigned short proxy_port;
185 const char *proxyhost = def_proxyhost;
186 const char *listenhost = def_listenhost;
187 unsigned int max_tunnels = def_max_tunnels;
188 const char *cacert = def_cacert;
189 const char *cert = def_cert;
190 const char *key = def_key;
191 const char *engine_id = def_engine_id;
192 int server_mode = def_server_mode;
193 const char *cipher_list = def_cipher_list;
194 int out_state = def_out_state;
195 int out_verify = def_out_verify;
196 int verify_mode = def_verify_mode;
198 /* Parse command-line arguments */
202 if(strcmp(*argv, "-listen") == 0) {
204 return usage("-listen requires an argument", 0);
208 } else if(strcmp(*argv, "-proxy") == 0) {
210 return usage("-proxy requires an argument", 0);
214 } else if(strcmp(*argv, "-maxtunnels") == 0) {
216 return usage("-maxtunnels requires an argument", 0);
218 if(!parse_max_tunnels(*argv, &max_tunnels))
221 } else if(strcmp(*argv, "-cacert") == 0) {
223 return usage("-cacert requires an argument", 0);
225 if(strcmp(*argv, "NULL") == 0)
230 } else if(strcmp(*argv, "-cert") == 0) {
232 return usage("-cert requires an argument", 0);
234 if(strcmp(*argv, "NULL") == 0)
239 } else if(strcmp(*argv, "-key") == 0) {
241 return usage("-key requires an argument", 0);
243 if(strcmp(*argv, "NULL") == 0)
248 } else if(strcmp(*argv, "-engine") == 0) {
250 return usage("-engine requires an argument", 0);
254 } else if(strcmp(*argv, "-server") == 0) {
256 return usage("-server requires an argument", 0);
258 if(!parse_server_mode(*argv, &server_mode))
261 } else if(strcmp(*argv, "-cipher") == 0) {
263 return usage("-cipher requires an argument", 0);
267 } else if(strcmp(*argv, "-out_state") == 0) {
270 } else if(strcmp(*argv, "-out_verify") == 0) {
273 } else if(strcmp(*argv, "-v_peer") == 0) {
274 verify_mode |= SSL_VERIFY_PEER;
276 } else if(strcmp(*argv, "-v_strict") == 0) {
277 verify_mode |= SSL_VERIFY_FAIL_IF_NO_PEER_CERT;
279 } else if(strcmp(*argv, "-v_once") == 0) {
280 verify_mode |= SSL_VERIFY_CLIENT_ONCE;
282 } else if((strcmp(*argv, "-h") == 0) ||
283 (strcmp(*argv, "-help") == 0) ||
284 (strcmp(*argv, "-?") == 0)) {
285 fprintf(stderr, "%s\n", helpstring);
288 return usage(*argv, 1);
291 /* Initialise network stuff */
293 return err_str0("ip_initialise failed");
294 err_str0("ip_initialise succeeded");
295 /* Create the SSL_CTX */
296 if((world.ssl_ctx = initialise_ssl_ctx(server_mode, engine_id,
297 cacert, cert, key, cipher_list, out_state, out_verify,
298 verify_mode)) == NULL)
299 return err_str1("initialise_ssl_ctx(engine_id=%s) failed",
300 (engine_id == NULL) ? "NULL" : engine_id);
301 err_str1("initialise_ssl_ctx(engine_id=%s) succeeded",
302 (engine_id == NULL) ? "NULL" : engine_id);
303 /* Create the listener */
304 if((world.listen_fd = ip_create_listener(listenhost)) == -1)
305 return err_str1("ip_create_listener(%s) failed", listenhost);
306 err_str1("ip_create_listener(%s) succeeded", listenhost);
307 if(!ip_parse_address(proxyhost, &proxy_ip, &proxy_port, 0))
308 return err_str1("ip_parse_address(%s) failed", proxyhost);
309 err_str1("ip_parse_address(%s) succeeded", proxyhost);
310 fprintf(stderr, "Info - proxying to %d.%d.%d.%d:%d\n",
311 (int)proxy_ip[0], (int)proxy_ip[1],
312 (int)proxy_ip[2], (int)proxy_ip[3], (int)proxy_port);
313 fprintf(stderr, "Info - set maxtunnels to %d\n", (int)max_tunnels);
314 fprintf(stderr, "Info - set to operate as an SSL %s\n",
315 (server_mode ? "server" : "client"));
316 /* Initialise the rest of the stuff */
317 world.tunnels_used = world.tunnels_size = 0;
318 world.tunnels = NULL;
319 world.server_mode = server_mode;
320 selector_init(&world.selector);
322 /* We're ready to loop */
324 /* Should we listen for *new* tunnels? */
325 if(world.tunnels_used < max_tunnels)
326 selector_add_listener(&world.selector, world.listen_fd);
327 /* We should add in our existing tunnels */
328 for(loop = 0; loop < world.tunnels_used; loop++)
329 selector_add_tunala(&world.selector, world.tunnels + loop);
330 /* Now do the select */
331 switch(selector_select(&world.selector)) {
333 fprintf(stderr, "selector_select returned a badness error.\n");
336 fprintf(stderr, "Warn, selector_select returned 0 - signal??\n");
341 /* Accept new connection if we should and can */
342 if((world.tunnels_used < max_tunnels) && (selector_get_listener(
343 &world.selector, world.listen_fd,
345 /* We have a new connection */
346 if(!tunala_world_new_item(&world, newfd,
347 proxy_ip, proxy_port))
348 fprintf(stderr, "tunala_world_new_item failed\n");
350 fprintf(stderr, "Info, new tunnel opened, now up to "
351 "%d\n", world.tunnels_used);
353 /* Give each tunnel its moment, note the while loop is because it makes
354 * the logic easier than with "for" to deal with an array that may shift
355 * because of deletes. */
357 t_item = world.tunnels;
358 while(loop < world.tunnels_used) {
359 if(!tunala_item_io(&world.selector, t_item)) {
360 /* We're closing whether for reasons of an error or a
361 * natural close. Don't increment loop or t_item because
362 * the next item is moving to us! */
363 tunala_world_del_item(&world, loop);
364 fprintf(stderr, "Info, tunnel closed, down to %d\n",
368 /* Move to the next item */
374 /* Should never get here */
383 static SSL_CTX *initialise_ssl_ctx(int server_mode, const char *engine_id,
384 const char *CAfile, const char *cert, const char *key,
385 const char *cipher_list, int out_state, int out_verify,
388 SSL_CTX *ctx, *ret = NULL;
393 EVP_PKEY *pkey = NULL;
395 OpenSSL_add_ssl_algorithms();
396 SSL_load_error_strings();
398 meth = (server_mode ? SSLv23_server_method() : SSLv23_client_method());
402 if((e = ENGINE_by_id(engine_id)) == NULL) {
403 fprintf(stderr, "Error obtaining '%s' engine, openssl "
404 "errors follow\n", engine_id);
407 if(!ENGINE_set_default(e, ENGINE_METHOD_ALL)) {
408 fprintf(stderr, "Error assigning '%s' engine, openssl "
409 "errors follow\n", engine_id);
414 if((ctx = SSL_CTX_new(meth)) == NULL)
418 if(!X509_STORE_load_locations(SSL_CTX_get_cert_store(ctx),
420 fprintf(stderr, "Error loading CA cert(s) in '%s'\n",
424 fprintf(stderr, "Info, operating with CA cert(s) in '%s'\n",
427 fprintf(stderr, "Info, operating without a CA cert(-list)\n");
428 if(!SSL_CTX_set_default_verify_paths(ctx)) {
429 fprintf(stderr, "Error setting default verify paths\n");
434 if((fp = fopen(cert, "r")) == NULL) {
435 fprintf(stderr, "Error opening cert file '%s'\n", cert);
438 if(!PEM_read_X509(fp, &x509, NULL, NULL)) {
439 fprintf(stderr, "Error reading PEM cert from '%s'\n",
443 if(!SSL_CTX_use_certificate(ctx, x509)) {
444 fprintf(stderr, "Error, cert in '%s' can not be used\n",
448 fprintf(stderr, "Info, operating with cert in '%s'\n", cert);
451 /* If a cert was given without matching key, we assume the same
452 * file contains the required key. */
457 fprintf(stderr, "Error, can't specify a key without a "
458 "corresponding certificate\n");
463 if((fp = fopen(key, "r")) == NULL) {
464 fprintf(stderr, "Error opening key file '%s'\n", key);
467 if(!PEM_read_PrivateKey(fp, &pkey, NULL, NULL)) {
468 fprintf(stderr, "Error reading PEM key from '%s'\n",
472 if(!SSL_CTX_use_PrivateKey(ctx, pkey)) {
473 fprintf(stderr, "Error, key in '%s' can not be used\n",
477 fprintf(stderr, "Info, operating with key in '%s'\n", key);
479 fprintf(stderr, "Info, operating without a cert or key\n");
483 if(!SSL_CTX_set_cipher_list(ctx, cipher_list)) {
484 fprintf(stderr, "Error setting cipher list '%s'\n",
488 fprintf(stderr, "Info, set cipher list '%s'\n", cipher_list);
490 fprintf(stderr, "Info, operating with default cipher list\n");
492 /* out_state (output of SSL handshake states to screen). */
494 cb_ssl_info_set_output(stderr);
496 /* out_verify & verify_mode */
498 cb_ssl_verify_set_output(stderr);
501 SSL_CTX_set_info_callback(ctx, cb_ssl_info);
502 SSL_CTX_set_verify(ctx, verify_mode, cb_ssl_verify);
506 ERR_print_errors_fp(stderr);
523 static void selector_sets_init(select_sets_t *s)
528 FD_ZERO(&s->excepts);
530 static void selector_init(tunala_selector_t *selector)
532 selector_sets_init(&selector->last_selected);
533 selector_sets_init(&selector->next_select);
536 #define SEL_EXCEPTS 0x00
537 #define SEL_READS 0x01
538 #define SEL_SENDS 0x02
539 static void selector_add_raw_fd(tunala_selector_t *s, int fd, int flags)
541 FD_SET(fd, &s->next_select.excepts);
542 if(flags & SEL_READS)
543 FD_SET(fd, &s->next_select.reads);
544 if(flags & SEL_SENDS)
545 FD_SET(fd, &s->next_select.sends);
547 if(s->next_select.max < (fd + 1))
548 s->next_select.max = fd + 1;
551 static void selector_add_listener(tunala_selector_t *selector, int fd)
553 selector_add_raw_fd(selector, fd, SEL_READS);
556 static void selector_add_tunala(tunala_selector_t *s, tunala_item_t *t)
558 /* Set clean read if sm.clean_in is not full */
559 if(t->clean_read != -1) {
560 selector_add_raw_fd(s, t->clean_read,
561 (buffer_full(state_machine_get_buffer(&t->sm,
562 SM_CLEAN_IN)) ? SEL_EXCEPTS : SEL_READS));
564 /* Set clean send if sm.clean_out is not empty */
565 if(t->clean_send != -1) {
566 selector_add_raw_fd(s, t->clean_send,
567 (buffer_empty(state_machine_get_buffer(&t->sm,
568 SM_CLEAN_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
570 /* Set dirty read if sm.dirty_in is not full */
571 if(t->dirty_read != -1) {
572 selector_add_raw_fd(s, t->dirty_read,
573 (buffer_full(state_machine_get_buffer(&t->sm,
574 SM_DIRTY_IN)) ? SEL_EXCEPTS : SEL_READS));
576 /* Set dirty send if sm.dirty_out is not empty */
577 if(t->dirty_send != -1) {
578 selector_add_raw_fd(s, t->dirty_send,
579 (buffer_empty(state_machine_get_buffer(&t->sm,
580 SM_DIRTY_OUT)) ? SEL_EXCEPTS : SEL_SENDS));
584 static int selector_select(tunala_selector_t *selector)
586 memcpy(&selector->last_selected, &selector->next_select,
587 sizeof(select_sets_t));
588 selector_sets_init(&selector->next_select);
589 return select(selector->last_selected.max,
590 &selector->last_selected.reads,
591 &selector->last_selected.sends,
592 &selector->last_selected.excepts, NULL);
595 /* This returns -1 for error, 0 for no new connections, or 1 for success, in
596 * which case *newfd is populated. */
597 static int selector_get_listener(tunala_selector_t *selector, int fd, int *newfd)
599 if(FD_ISSET(fd, &selector->last_selected.excepts))
601 if(!FD_ISSET(fd, &selector->last_selected.reads))
603 if((*newfd = ip_accept_connection(fd)) == -1)
608 /************************/
609 /* "Tunala" world stuff */
610 /************************/
612 static int tunala_world_make_room(tunala_world_t *world)
614 unsigned int newsize;
615 tunala_item_t *newarray;
617 if(world->tunnels_used < world->tunnels_size)
619 newsize = (world->tunnels_size == 0 ? 16 :
620 ((world->tunnels_size * 3) / 2));
621 if((newarray = malloc(newsize * sizeof(tunala_item_t))) == NULL)
623 memset(newarray, 0, newsize * sizeof(tunala_item_t));
624 if(world->tunnels_used > 0)
625 memcpy(newarray, world->tunnels,
626 world->tunnels_used * sizeof(tunala_item_t));
627 if(world->tunnels_size > 0)
628 free(world->tunnels);
630 world->tunnels = newarray;
631 world->tunnels_size = newsize;
635 static int tunala_world_new_item(tunala_world_t *world, int fd,
636 const unsigned char *ip, unsigned short port)
642 if(!tunala_world_make_room(world))
644 if((new_ssl = SSL_new(world->ssl_ctx)) == NULL) {
645 fprintf(stderr, "Error creating new SSL\n");
646 ERR_print_errors_fp(stderr);
649 item = world->tunnels + (world->tunnels_used++);
650 state_machine_init(&item->sm);
651 item->clean_read = item->clean_send =
652 item->dirty_read = item->dirty_send = -1;
653 if((newfd = ip_create_connection_split(ip, port)) == -1)
655 /* Which way round? If we're a server, "fd" is the dirty side and the
656 * connection we open is the clean one. For a client, it's the other way
658 if(world->server_mode) {
659 item->dirty_read = item->dirty_send = fd;
660 item->clean_read = item->clean_send = newfd;
662 item->clean_read = item->clean_send = fd;
663 item->dirty_read = item->dirty_send = newfd;
665 /* We use the SSL's "app_data" to indicate a call-back induced "kill" */
666 SSL_set_app_data(new_ssl, NULL);
667 if(!state_machine_set_SSL(&item->sm, new_ssl, world->server_mode))
671 tunala_world_del_item(world, world->tunnels_used - 1);
676 static void tunala_world_del_item(tunala_world_t *world, unsigned int idx)
678 tunala_item_t *item = world->tunnels + idx;
679 if(item->clean_read != -1)
680 close(item->clean_read);
681 if(item->clean_send != item->clean_read)
682 close(item->clean_send);
683 item->clean_read = item->clean_send = -1;
684 if(item->dirty_read != -1)
685 close(item->dirty_read);
686 if(item->dirty_send != item->dirty_read)
687 close(item->dirty_send);
688 item->dirty_read = item->dirty_send = -1;
689 state_machine_close(&item->sm);
690 /* OK, now we fix the item array */
691 if(idx + 1 < world->tunnels_used)
692 /* We need to scroll entries to the left */
693 memmove(world->tunnels + idx,
694 world->tunnels + (idx + 1),
695 (world->tunnels_used - (idx + 1)) *
696 sizeof(tunala_item_t));
697 world->tunnels_used--;
700 static int tunala_item_io(tunala_selector_t *selector, tunala_item_t *item)
702 int c_r, c_s, d_r, d_s; /* Four boolean flags */
704 /* Take ourselves out of the gene-pool if there was an except */
705 if((item->clean_read != -1) && FD_ISSET(item->clean_read,
706 &selector->last_selected.excepts))
708 if((item->clean_send != -1) && FD_ISSET(item->clean_send,
709 &selector->last_selected.excepts))
711 if((item->dirty_read != -1) && FD_ISSET(item->dirty_read,
712 &selector->last_selected.excepts))
714 if((item->dirty_send != -1) && FD_ISSET(item->dirty_send,
715 &selector->last_selected.excepts))
717 /* Grab our 4 IO flags */
718 c_r = c_s = d_r = d_s = 0;
719 if(item->clean_read != -1)
720 c_r = FD_ISSET(item->clean_read, &selector->last_selected.reads);
721 if(item->clean_send != -1)
722 c_s = FD_ISSET(item->clean_send, &selector->last_selected.sends);
723 if(item->dirty_read != -1)
724 d_r = FD_ISSET(item->dirty_read, &selector->last_selected.reads);
725 if(item->dirty_send != -1)
726 d_s = FD_ISSET(item->dirty_send, &selector->last_selected.sends);
727 /* If no IO has happened for us, skip needless data looping */
728 if(!c_r && !c_s && !d_r && !d_s)
731 c_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
732 SM_CLEAN_IN), item->clean_read) <= 0);
734 c_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
735 SM_CLEAN_OUT), item->clean_send) <= 0);
737 d_r = (buffer_from_fd(state_machine_get_buffer(&item->sm,
738 SM_DIRTY_IN), item->dirty_read) <= 0);
740 d_s = (buffer_to_fd(state_machine_get_buffer(&item->sm,
741 SM_DIRTY_OUT), item->dirty_send) <= 0);
742 /* If any of the flags is non-zero, that means they need closing */
744 close(item->clean_read);
745 if(item->clean_send == item->clean_read)
746 item->clean_send = -1;
747 item->clean_read = -1;
749 if(c_s && (item->clean_send != -1)) {
750 close(item->clean_send);
751 if(item->clean_send == item->clean_read)
752 item->clean_read = -1;
753 item->clean_send = -1;
756 close(item->dirty_read);
757 if(item->dirty_send == item->dirty_read)
758 item->dirty_send = -1;
759 item->dirty_read = -1;
761 if(d_s && (item->dirty_send != -1)) {
762 close(item->dirty_send);
763 if(item->dirty_send == item->dirty_read)
764 item->dirty_read = -1;
765 item->dirty_send = -1;
767 /* This function name is attributed to the term donated by David
768 * Schwartz on openssl-dev, message-ID:
769 * <NCBBLIEPOCNJOAEKBEAKEEDGLIAA.davids@webmaster.com>. :-) */
770 if(!state_machine_churn(&item->sm))
771 /* If the SSL closes, it will also zero-out the _in buffers
772 * and will in future process just outgoing data. As and
773 * when the outgoing data has gone, it will return zero
774 * here to tell us to bail out. */
776 /* Otherwise, we return zero if both sides are dead. */
777 if(((item->clean_read == -1) || (item->clean_send == -1)) &&
778 ((item->dirty_read == -1) || (item->dirty_send == -1)))
780 /* If only one side closed, notify the SSL of this so it can take
781 * appropriate action. */
782 if((item->clean_read == -1) || (item->clean_send == -1)) {
783 if(!state_machine_close_clean(&item->sm))
786 if((item->dirty_read == -1) || (item->dirty_send == -1)) {
787 if(state_machine_close_dirty(&item->sm))