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Date:: Tue Sep 13 21:29:14 2022 UTC
Message:: scaffold the gemtext -> html conversion
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1 /*
2  * Copyright (c) 2022 Omar Polo <op@omarpolo.com>
3  * Copyright (c) 2006 - 2015 Reyk Floeter <reyk@openbsd.org>
4  *
5  * Permission to use, copy, modify, and distribute this software for any
6  * purpose with or without fee is hereby granted, provided that the above
7  * copyright notice and this permission notice appear in all copies.
8  *
9  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
10  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
11  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
12  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
13  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
14  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
15  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
16  */
17 
18 #include <sys/types.h>
19 #include <sys/queue.h>
20 #include <sys/tree.h>
21 #include <sys/socket.h>
22 #include <sys/uio.h>
23 
24 #include <netinet/in.h>
25 #include <arpa/inet.h>
26 #include <netdb.h>
27 
28 #include <asr.h>
29 #include <ctype.h>
30 #include <errno.h>
31 #include <event.h>
32 #include <limits.h>
33 #include <stdlib.h>
34 #include <stdint.h>
35 #include <stdio.h>
36 #include <string.h>
37 #include <imsg.h>
38 #include <tls.h>
39 #include <unistd.h>
40 
41 #include "log.h"
42 #include "proc.h"
43 
44 #include "galileo.h"
45 
46 #define MINIMUM(a, b)	((a) < (b) ? (a) : (b))
47 
48 /* provided by OpenBSD' base libevent but not in any header? */
49 extern void	 bufferevent_read_pressure_cb(struct evbuffer *, size_t,
50 		    size_t, void *);
51 
52 void	proxy_init(struct privsep *, struct privsep_proc *, void *);
53 int	proxy_launch(struct galileo *);
54 void	proxy_inflight_dec(const char *);
55 int	proxy_dispatch_parent(int, struct privsep_proc *, struct imsg *);
56 void	proxy_translate_gemtext(struct client *);
57 void	proxy_resolved(struct asr_result *, void *);
58 void	proxy_connect(int, short, void *);
59 void	proxy_read(struct bufferevent *, void *);
60 void	proxy_write(struct bufferevent *, void *);
61 void	proxy_error(struct bufferevent *, short, void *);
62 int	proxy_bufferevent_add(struct event *, int);
63 void	proxy_tls_writecb(int, short, void *);
64 void	proxy_tls_readcb(int, short, void *);
65 
66 static struct privsep_proc procs[] = {
67 	{ "parent",	PROC_PARENT, proxy_dispatch_parent },
68 };
69 
70 volatile int proxy_clients;
71 volatile int proxy_inflight;
72 uint32_t proxy_fcg_id;
73 
74 void
75 proxy(struct privsep *ps, struct privsep_proc *p)
76 {
77 	proc_run(ps, p, procs, nitems(procs), proxy_init, NULL);
78 }
79 
80 void
81 proxy_init(struct privsep *ps, struct privsep_proc *p, void *arg)
82 {
83 	if (config_init(ps->ps_env) == -1)
84 		fatal("failed to initialize configuration");
85 
86 	/* We use a custom shutdown callback */
87 	/* p->p_shutdown = proxy_shutdown */
88 
89 	if (pledge("stdio recvfd unix inet dns", NULL) == -1)
90 		fatal("pledge");
91 }
92 
93 int
94 proxy_launch(struct galileo *env)
95 {
96 	event_add(&env->sc_evsock, NULL);
97 	return (0);
98 }
99 
100 void
101 proxy_purge(struct server *srv)
102 {
103 }
104 
105 void
106 proxy_inflight_dec(const char *why)
107 {
108 	proxy_inflight--;
109 	log_debug("%s: inflight decremented, now %d, %s",
110 	    __func__, proxy_inflight, why);
111 }
112 
113 int
114 proxy_dispatch_parent(int fd, struct privsep_proc *p, struct imsg *imsg)
115 {
116 	struct privsep	*ps = p->p_ps;
117 	struct galileo	*env = ps->ps_env;
118 
119 	switch (imsg->hdr.type) {
120 	case IMSG_CFG_SRV:
121 		if (config_getserver(env, imsg) == -1)
122 			fatal("config_getproxy");
123 		break;
124 	case IMSG_CFG_SOCK:
125 		/* XXX: improve */
126 
127 		if (env->sc_sock_fd != -1) {
128 			event_del(&env->sc_evsock);
129 			close(env->sc_sock_fd);
130 		}
131 
132 		env->sc_sock_fd = config_getsock(env, imsg);
133 		if (env->sc_sock_fd == -1)
134 			fatal("config_getsock");
135 
136 		event_set(&env->sc_evsock, env->sc_sock_fd,
137 		    EV_READ | EV_PERSIST, fcgi_accept, env);
138 		event_add(&env->sc_evsock, NULL);
139 		evtimer_set(&env->sc_evpause, fcgi_accept, env);
140 		break;
141 	case IMSG_CFG_DONE:
142 		log_debug("config done!");
143 		break;
144 	case IMSG_CTL_START:
145 		proxy_launch(env);
146 		break;
147 	default:
148 		log_warnx("unknown message %d", imsg->hdr.type);
149 		return (-1);
150 	}
151 
152 	return (0);
153 }
154 
155 static inline int
156 printurl(struct client *clt, const char *str)
157 {
158 	for (; *str; ++str) {
159 		switch (*str) {
160 		case ' ':
161 		case '\t':
162 		case '\'':
163 		case '\\':
164 			if (clt_printf(clt, "%2X", (unsigned char)*str) == -1)
165 				return (-1);
166 			break;
167 		default:
168 			if (clt_putc(clt, *str) == -1)
169 				return (-1);
170 			break;
171 		}
172 	}
173 
174 	return (0);
175 }
176 
177 static inline int
178 htmlescape(struct client *clt, const char *str)
179 {
180 	int r;
181 
182 	for (; *str; ++str) {
183 		switch (*str) {
184 		case '<':
185 			r = clt_puts(clt, "&lt;");
186 			break;
187 		case '>':
188 			r = clt_puts(clt, "&gt;");
189 			break;
190 		case '&':
191 			r = clt_puts(clt, "&amp;");
192 			break;
193 		default:
194 			r = clt_putc(clt, *str);
195 			break;
196 		}
197 
198 		if (r == -1)
199 			return (-1);
200 	}
201 
202 	return (0);
203 }
204 
205 static int
206 gemtext_translate_line(struct client *clt, char *line)
207 {
208 	/* preformatted line / closing */
209 	if (clt->clt_inpre) {
210 		if (!strncmp(line, "```", 3)) {
211 			clt->clt_inpre = 0;
212 			return (clt_puts(clt, "</pre>"));
213 		}
214 
215 		if (htmlescape(clt, line) == -1)
216 			return (-1);
217 		return (clt_putc(clt, '\n'));
218 	}
219 
220 	/* pre opening */
221 	if (!strncmp(line, "```", 3)) {
222 		clt->clt_inpre = 1;
223 		return (clt_puts(clt, "<pre>"));
224 	}
225 
226 	/* citation block */
227 	if (*line == '>') {
228 		if (clt_puts(clt, "<blockquote>") == -1 ||
229 		    htmlescape(clt, line + 1) == -1 ||
230 		    clt_puts(clt, "</blockquote>") == -1)
231 			return (-1);
232 		return (0);
233 	}
234 
235 	/* headings */
236 	if (!strncmp(line, "###", 3)) {
237 		if (clt_puts(clt, "<h3>") == -1 ||
238 		    htmlescape(clt, line + 3) == -1 ||
239 		    clt_puts(clt, "</h3>") == -1)
240 			return (-1);
241 		return (0);
242 	}
243 	if (!strncmp(line, "##", 2)) {
244 		if (clt_puts(clt, "<h2>") == -1 ||
245 		    htmlescape(clt, line + 2) == -1 ||
246 		    clt_puts(clt, "</h2>") == -1)
247 			return (-1);
248 		return (0);
249 	}
250 	if (!strncmp(line, "#", 1)) {
251 		if (clt_puts(clt, "<h1>") == -1 ||
252 		    htmlescape(clt, line + 1) == -1 ||
253 		    clt_puts(clt, "</h1>") == -1)
254 			return (-1);
255 		return (0);
256 	}
257 
258 	/* bullet -- XXX: group */
259 	if (!strncmp(line, "* ", 2)) {
260 		if (clt_puts(clt, "<ul><li>") == -1 ||
261 		    htmlescape(clt, line + 2) == -1 ||
262 		    clt_puts(clt, "</li></ul>") == -1)
263 			return (-1);
264 		return (0);
265 	}
266 
267 	/* link -- XXX: group */
268 	if (!strncmp(line, "=>", 2)) {
269 		char *label;
270 
271 		line += 2;
272 		line += strspn(line, " \t");
273 
274 		label = line + strcspn(line, " \t");
275 		if (*label == '\0')
276 			label = line;
277 		else
278 			*label++ = '\0';
279 
280 		if (clt_puts(clt, "<p><a href='") == -1 ||
281 		    printurl(clt, line) == -1 ||
282 		    clt_puts(clt, "'>") == -1 ||
283 		    htmlescape(clt, label) == -1 ||
284 		    clt_puts(clt, "</a></p>") == -1)
285 			return (-1);
286 		return (0);
287 	}
288 
289 	/* paragraph */
290 	if (clt_puts(clt, "<p>") == -1 ||
291 	    htmlescape(clt, line) == -1 ||
292 	    clt_puts(clt, "</p>") == -1)
293 		return (-1);
294 	return (0);
295 }
296 
297 void
298 proxy_translate_gemtext(struct client *clt)
299 {
300 	struct bufferevent	*bev = clt->clt_bev;
301 	struct evbuffer		*src = EVBUFFER_INPUT(bev);
302 	char			*line;
303 	size_t			 len;
304 	int			 r;
305 
306 	for (;;) {
307 		line = evbuffer_readln(src, &len, EVBUFFER_EOL_ANY);
308 		if (line == NULL)
309 			return;
310 
311 		r = gemtext_translate_line(clt, line);
312 		free(line);
313 		if (r == -1)
314 			return;
315 	}
316 }
317 
318 static struct proxy_config *
319 proxy_server_match(struct galileo *env, struct client *clt)
320 {
321 	struct server		*srv;
322 
323 	if (clt->clt_server_name == NULL)
324 		return NULL;
325 
326 	TAILQ_FOREACH(srv, &env->sc_servers, srv_entry) {
327 		if (!strcmp(clt->clt_server_name, srv->srv_conf.host))
328 			return &srv->srv_conf;
329 	}
330 
331 	return NULL;
332 }
333 
334 void
335 proxy_start_request(struct galileo *env, struct client *clt)
336 {
337 	struct addrinfo		 hints;
338 	struct asr_query	*query;
339 	char			 port[32];
340 
341 	if ((clt->clt_pc = proxy_server_match(env, clt)) == NULL) {
342 		if (clt_printf(clt, "Status: 501\r\n\r\n") == -1)
343 			return;
344 		fcgi_end_request(clt, 1);
345 		return;
346 	}
347 
348 	(void)snprintf(port, sizeof(port), "%d", clt->clt_pc->proxy_port);
349 
350 	memset(&hints, 0, sizeof(hints));
351 	hints.ai_family = AF_UNSPEC;
352 	hints.ai_socktype = SOCK_STREAM;
353 
354 	query = getaddrinfo_async(clt->clt_pc->proxy_addr, port, &hints, NULL);
355 	if (query == NULL) {
356 		log_warn("getaddrinfo_async");
357 		fcgi_abort_request(clt);
358 		return;
359 	}
360 
361 	clt->clt_evasr = event_asr_run(query, proxy_resolved, clt);
362 	if (clt->clt_evasr == NULL) {
363 		log_warn("event_asr_run");
364 		asr_abort(query);
365 		fcgi_abort_request(clt);
366 		return;
367 	}
368 }
369 
370 void
371 proxy_resolved(struct asr_result *res, void *d)
372 {
373 	struct client		*clt = d;
374 	struct proxy_config	*pc = clt->clt_pc;
375 
376 	clt->clt_evasr = NULL;
377 
378 	if (res->ar_gai_errno != 0) {
379 		log_warnx("failed to resolve %s:%d: %s",
380 		    pc->proxy_addr, pc->proxy_port,
381 		    gai_strerror(res->ar_gai_errno));
382 		if (clt_printf(clt, "Status: 501\r\n") == -1)
383 			return;
384 		if (clt_printf(clt, "Content-Type: text/plain\r\n") == -1)
385 			return;
386 		if (clt_printf(clt, "Proxy error; connection failed") == -1)
387 			return;
388 		fcgi_end_request(clt, 1);
389 		return;
390 	}
391 
392 	clt->clt_addrinfo = res->ar_addrinfo;
393 	clt->clt_p = clt->clt_addrinfo;
394 	proxy_connect(-1, 0, clt);
395 }
396 
397 void
398 proxy_connect(int fd, short ev, void *d)
399 {
400 	struct client		*clt = d;
401 	struct evbuffer		*out;
402 	struct addrinfo		*p;
403 	struct tls_config	*conf;
404 	struct timeval		 conntv = {5, 0};
405 	int			 err = 0;
406 	socklen_t		 len = sizeof(err);
407 
408 again:
409 	if (clt->clt_p == NULL)
410 		goto err;
411 
412 	if (clt->clt_fd != -1) {
413 		if (getsockopt(clt->clt_fd, SOL_SOCKET, SO_ERROR, &err, &len)
414 		    == -1)
415 			goto err;
416 		if (err != 0) {
417 			errno = err;
418 			goto err;
419 		}
420 		goto done;
421 	}
422 
423 	p = clt->clt_p;
424 	clt->clt_fd = socket(p->ai_family, p->ai_socktype | SOCK_NONBLOCK,
425 	    p->ai_protocol);
426 	if (clt->clt_fd == -1) {
427 		clt->clt_p = clt->clt_p->ai_next;
428 		goto again;
429 	}
430 
431 	if (connect(clt->clt_fd, p->ai_addr, p->ai_addrlen) == 0)
432 		goto done;
433 
434 	clt->clt_evconn_live = 1;
435 	event_set(&clt->clt_evconn, clt->clt_fd, EV_WRITE, proxy_connect, clt);
436 	event_add(&clt->clt_evconn, &conntv);
437 	return;
438 
439 done:
440 	clt->clt_evconn_live = 0;
441 	freeaddrinfo(clt->clt_addrinfo);
442 	clt->clt_addrinfo = clt->clt_p = NULL;
443 
444 	/* initialize TLS for Gemini */
445 	if ((conf = tls_config_new()) == NULL) {
446 		log_warn("tls_config_new failed");
447 		goto err;
448 	}
449 
450 	tls_config_insecure_noverifycert(conf);
451 
452 	if ((clt->clt_ctx = tls_client()) == NULL) {
453 		log_warnx("tls_client failed");
454 		tls_config_free(conf);
455 		goto err;
456 	}
457 
458 	if (tls_configure(clt->clt_ctx, conf) == -1) {
459 		log_warnx("tls_configure failed");
460 		tls_config_free(conf);
461 		goto err;
462 	}
463 
464 	tls_config_free(conf);
465 
466 	if (tls_connect_socket(clt->clt_ctx, clt->clt_fd,
467 	    clt->clt_pc->proxy_name) == -1) {
468 		log_warnx("tls_connect_socket failed");
469 		goto err;
470 	}
471 
472 	clt->clt_bev = bufferevent_new(clt->clt_fd, proxy_read, proxy_write,
473 	    proxy_error, clt);
474 	if (clt->clt_bev == NULL) {
475 		log_warn("bufferevent_new");
476 		goto err;
477 	}
478 	out = EVBUFFER_OUTPUT(clt->clt_bev);
479 
480 	event_set(&clt->clt_bev->ev_read, clt->clt_fd, EV_READ,
481 	    proxy_tls_readcb, clt->clt_bev);
482 	event_set(&clt->clt_bev->ev_write, clt->clt_fd, EV_WRITE,
483 	    proxy_tls_writecb, clt->clt_bev);
484 
485 	/* bufferevent_settimeout(); */
486 	bufferevent_enable(clt->clt_bev, EV_READ|EV_WRITE);
487 
488 	/* TODO: compute the URL */
489 	if (evbuffer_add_printf(out, "gemini://localhost/\r\n") == -1) {
490 		log_warn("bufferevent_printf failed");
491 		goto err;
492 	}
493 
494 	return;
495 
496 err:
497 	log_warn("failed to connect to %s:%d",
498 	    clt->clt_pc->proxy_addr, clt->clt_pc->proxy_port);
499 	if (clt_printf(clt, "Status: 501\r\n") == -1)
500 		return;
501 	if (clt_printf(clt, "Content-Type: text/plain\r\n") == -1)
502 		return;
503 	if (clt_printf(clt, "Proxy error; connection failed") == -1)
504 		return;
505 	fcgi_end_request(clt, 1);
506 }
507 
508 void
509 proxy_read(struct bufferevent *bev, void *d)
510 {
511 	struct client		*clt = d;
512 	struct evbuffer		*src = EVBUFFER_INPUT(bev);
513 	const char		*ctype;
514 	char			*hdr;
515 	size_t			 len;
516 	int			 code;
517 
518 	if (clt->clt_headersdone) {
519 	copy:
520 		if (clt->clt_translate)
521 			proxy_translate_gemtext(clt);
522 		else
523 			clt_write_bufferevent(clt, bev);
524 		return;
525 	}
526 
527 	hdr = evbuffer_readln(src, &len, EVBUFFER_EOL_CRLF_STRICT);
528 	if (hdr == NULL) {
529 		if (EVBUFFER_LENGTH(src) >= 1026)
530 			proxy_error(bev, EV_READ, clt);
531 		return;
532 	}
533 
534 	if (len < 4 ||
535 	    !isdigit((unsigned char)hdr[0]) ||
536 	    !isdigit((unsigned char)hdr[1]) ||
537 	    hdr[2] != ' ') {
538 		log_warnx("invalid ");
539 		free(hdr);
540 		proxy_error(bev, EV_READ, clt);
541 		return;
542 	}
543 
544 	code = (hdr[0] - '0') * 10 + (hdr[1] - '0');
545 	if (code != 20) {
546 		log_warnx("un-handled gemini reply status %d", code);
547 		free(hdr);
548 		proxy_error(bev, EV_READ, clt);
549 		return;
550 	}
551 
552 	if (!strncmp(&hdr[3], "text/gemini", 11)) {
553 		ctype = "text/html; charset=utf8";
554 		clt->clt_translate = 1;
555 	} else
556 		ctype = &hdr[3];
557 
558 	if (clt_printf(clt, "Content-Type: %s\r\n", ctype) == -1)
559 		return;
560 	if (clt_printf(clt, "\r\n") == -1)
561 		return;
562 
563 	clt->clt_headersdone = 1;
564 
565 	if (clt->clt_translate) {
566 		if (clt_puts(clt, "<!doctype html>"
567 		    "<html><head></head><body>") == -1)
568 			return;
569 	}
570 
571 	goto copy;
572 }
573 
574 void
575 proxy_write(struct bufferevent *bev, void *d)
576 {
577 	return;
578 }
579 
580 void
581 proxy_error(struct bufferevent *bev, short err, void *d)
582 {
583 	struct client		*clt = d;
584 	int			 status = !(err & EVBUFFER_EOF);
585 
586 	log_debug("proxy error, shutting down the connection (err: %x)",
587 	    err);
588 
589 	if (!clt->clt_headersdone) {
590 		if (clt_printf(clt, "Status: 501\r\n") == -1)
591 			return;
592 		if (clt_printf(clt, "Content-Type: text/plain\r\n") == -1)
593 			return;
594 		if (clt_printf(clt, "Proxy error\n") == -1)
595 			return;
596 	} else if (status == 0) {
597 		if (clt_puts(clt, "</body></html>") == -1)
598 			return;
599 	}
600 
601 	fcgi_end_request(clt, status);
602 }
603 
604 void
605 proxy_tls_readcb(int fd, short event, void *arg)
606 {
607 	struct bufferevent	*bufev = arg;
608 	struct client		*clt = bufev->cbarg;
609 	char			 rbuf[IBUF_READ_SIZE];
610 	int			 what = EVBUFFER_READ;
611 	int			 howmuch = IBUF_READ_SIZE;
612 	ssize_t			 ret;
613 	size_t			 len;
614 
615 	if (event == EV_TIMEOUT) {
616 		what |= EVBUFFER_TIMEOUT;
617 		goto err;
618 	}
619 
620 	if (bufev->wm_read.high != 0)
621 		howmuch = MINIMUM(sizeof(rbuf), bufev->wm_read.high);
622 
623 	ret = tls_read(clt->clt_ctx, rbuf, howmuch);
624 	if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) {
625 		goto retry;
626 	} else if (ret == -1) {
627 		what |= EVBUFFER_ERROR;
628 		goto err;
629 	}
630 	len = ret;
631 
632 	if (len == 0) {
633 		what |= EVBUFFER_EOF;
634 		goto err;
635 	}
636 
637 	if (evbuffer_add(bufev->input, rbuf, len) == -1) {
638 		what |= EVBUFFER_ERROR;
639 		goto err;
640 	}
641 
642 	proxy_bufferevent_add(&bufev->ev_read, bufev->timeout_read);
643 
644 	len = EVBUFFER_LENGTH(bufev->input);
645 	if (bufev->wm_read.low != 0 && len < bufev->wm_read.low)
646 		return;
647 	if (bufev->wm_read.high != 0 && len > bufev->wm_read.high) {
648 		struct evbuffer *buf = bufev->input;
649 		event_del(&bufev->ev_read);
650 		evbuffer_setcb(buf, bufferevent_read_pressure_cb, bufev);
651 		return;
652 	}
653 
654 	if (bufev->readcb != NULL)
655 		(*bufev->readcb)(bufev, bufev->cbarg);
656 	return;
657 
658 retry:
659 	proxy_bufferevent_add(&bufev->ev_read, bufev->timeout_read);
660 	return;
661 
662 err:
663 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
664 }
665 
666 int
667 proxy_bufferevent_add(struct event *ev, int timeout)
668 {
669 	struct timeval tv, *ptv = NULL;
670 
671 	if (timeout) {
672 		timerclear(&tv);
673 		tv.tv_sec = timeout;
674 		ptv = &tv;
675 	}
676 
677 	return (event_add(ev, ptv));
678 }
679 
680 void
681 proxy_tls_writecb(int fd, short event, void *arg)
682 {
683 	struct bufferevent	*bufev = arg;
684 	struct client		*clt = bufev->cbarg;
685 	ssize_t			 ret;
686 	short			 what = EVBUFFER_WRITE;
687 	size_t			 len;
688 
689 	if (event == EV_TIMEOUT) {
690 		what |= EVBUFFER_TIMEOUT;
691 		goto err;
692 	}
693 
694 	if (EVBUFFER_LENGTH(bufev->output)) {
695 		ret = tls_write(clt->clt_ctx,
696 		    EVBUFFER_DATA(bufev->output),
697 		    EVBUFFER_LENGTH(bufev->output));
698 		if (ret == TLS_WANT_POLLIN || ret == TLS_WANT_POLLOUT) {
699 			goto retry;
700 		} else if (ret == -1) {
701 			what |= EVBUFFER_ERROR;
702 			goto err;
703 		}
704 		len = ret;
705 		evbuffer_drain(bufev->output, len);
706 	}
707 
708 	if (EVBUFFER_LENGTH(bufev->output) != 0)
709 		proxy_bufferevent_add(&bufev->ev_write, bufev->timeout_write);
710 
711 	if (bufev->writecb != NULL &&
712 	    EVBUFFER_LENGTH(bufev->output) <= bufev->wm_write.low)
713 		(*bufev->writecb)(bufev, bufev->cbarg);
714 	return;
715 
716 retry:
717 	proxy_bufferevent_add(&bufev->ev_write, bufev->timeout_write);
718 	return;
719 
720 err:
721 	(*bufev->errorcb)(bufev, what, bufev->cbarg);
722 }
723 
724 void
725 proxy_client_free(struct client *clt)
726 {
727 	if (clt->clt_evasr)
728 		event_asr_abort(clt->clt_evasr);
729 
730 	if (clt->clt_addrinfo)
731 		freeaddrinfo(clt->clt_addrinfo);
732 
733 	if (clt->clt_evconn_live)
734 		event_del(&clt->clt_evconn);
735 
736 	if (clt->clt_fd != -1)
737 		close(clt->clt_fd);
738 
739 	if (clt->clt_ctx)
740 		tls_free(clt->clt_ctx);
741 
742 	if (clt->clt_bev)
743 		bufferevent_free(clt->clt_bev);
744 
745 	free(clt->clt_server_name);
746 	free(clt->clt_script_name);
747 	free(clt->clt_path_info);
748 	free(clt);
749 }