1 8a35f56c 2022-07-16 thomas /*
  2 8a35f56c 2022-07-16 thomas  * Copyright (c) 2020-2022 Tracey Emery <tracey@traceyemery.net>
  3 8a35f56c 2022-07-16 thomas  * Copyright (c) 2013 David Gwynne <dlg@openbsd.org>
  4 8a35f56c 2022-07-16 thomas  * Copyright (c) 2013 Florian Obser <florian@openbsd.org>
  5 8a35f56c 2022-07-16 thomas  *
  6 8a35f56c 2022-07-16 thomas  * Permission to use, copy, modify, and distribute this software for any
  7 8a35f56c 2022-07-16 thomas  * purpose with or without fee is hereby granted, provided that the above
  8 8a35f56c 2022-07-16 thomas  * copyright notice and this permission notice appear in all copies.
  9 8a35f56c 2022-07-16 thomas  *
 10 8a35f56c 2022-07-16 thomas  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 11 8a35f56c 2022-07-16 thomas  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 12 8a35f56c 2022-07-16 thomas  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 13 8a35f56c 2022-07-16 thomas  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 14 8a35f56c 2022-07-16 thomas  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 15 8a35f56c 2022-07-16 thomas  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 16 8a35f56c 2022-07-16 thomas  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 17 8a35f56c 2022-07-16 thomas  */
 18 4fccd2fe 2023-03-08 thomas 
 19 4fccd2fe 2023-03-08 thomas #include "got_compat.h"
 20 8a35f56c 2022-07-16 thomas 
 21 8a35f56c 2022-07-16 thomas #include <arpa/inet.h>
 22 8b925c6c 2022-07-16 thomas #include <sys/queue.h>
 23 8a35f56c 2022-07-16 thomas #include <sys/socket.h>
 24 8a35f56c 2022-07-16 thomas #include <sys/types.h>
 25 0335d24d 2022-08-06 thomas #include <sys/uio.h>
 26 8a35f56c 2022-07-16 thomas 
 27 8a35f56c 2022-07-16 thomas #include <errno.h>
 28 8a35f56c 2022-07-16 thomas #include <event.h>
 29 79393471 2022-08-27 thomas #include <imsg.h>
 30 79393471 2022-08-27 thomas #include <stdarg.h>
 31 8a35f56c 2022-07-16 thomas #include <stdlib.h>
 32 8a35f56c 2022-07-16 thomas #include <stdio.h>
 33 8a35f56c 2022-07-16 thomas #include <string.h>
 34 8a35f56c 2022-07-16 thomas #include <time.h>
 35 8a35f56c 2022-07-16 thomas #include <unistd.h>
 36 8a35f56c 2022-07-16 thomas 
 37 8a35f56c 2022-07-16 thomas #include "got_error.h"
 38 161663e7 2023-03-11 thomas #include "got_reference.h"
 39 8a35f56c 2022-07-16 thomas 
 40 8a35f56c 2022-07-16 thomas #include "proc.h"
 41 8a35f56c 2022-07-16 thomas #include "gotwebd.h"
 42 e7e5fa49 2022-12-30 thomas #include "tmpl.h"
 43 8a35f56c 2022-07-16 thomas 
 44 8a35f56c 2022-07-16 thomas size_t	 fcgi_parse_record(uint8_t *, size_t, struct request *);
 45 8a35f56c 2022-07-16 thomas void	 fcgi_parse_begin_request(uint8_t *, uint16_t, struct request *,
 46 8a35f56c 2022-07-16 thomas 	    uint16_t);
 47 8a35f56c 2022-07-16 thomas void	 fcgi_parse_params(uint8_t *, uint16_t, struct request *, uint16_t);
 48 e5539f76 2022-08-10 thomas int	 fcgi_send_response(struct request *, int, const void *, size_t);
 49 8a35f56c 2022-07-16 thomas 
 50 8a35f56c 2022-07-16 thomas void	 dump_fcgi_record_header(const char *, struct fcgi_record_header *);
 51 8a35f56c 2022-07-16 thomas void	 dump_fcgi_begin_request_body(const char *,
 52 8a35f56c 2022-07-16 thomas 	    struct fcgi_begin_request_body *);
 53 8a35f56c 2022-07-16 thomas void	 dump_fcgi_end_request_body(const char *,
 54 8a35f56c 2022-07-16 thomas 	    struct fcgi_end_request_body *);
 55 8a35f56c 2022-07-16 thomas 
 56 8a35f56c 2022-07-16 thomas extern int	 cgi_inflight;
 57 8a35f56c 2022-07-16 thomas extern volatile int client_cnt;
 58 8a35f56c 2022-07-16 thomas 
 59 8a35f56c 2022-07-16 thomas void
 60 8a35f56c 2022-07-16 thomas fcgi_request(int fd, short events, void *arg)
 61 8a35f56c 2022-07-16 thomas {
 62 8a35f56c 2022-07-16 thomas 	struct request *c = arg;
 63 8a35f56c 2022-07-16 thomas 	ssize_t n;
 64 8a35f56c 2022-07-16 thomas 	size_t parsed = 0;
 65 8a35f56c 2022-07-16 thomas 
 66 8a35f56c 2022-07-16 thomas 	n = read(fd, c->buf + c->buf_pos + c->buf_len,
 67 8a35f56c 2022-07-16 thomas 	    FCGI_RECORD_SIZE - c->buf_pos-c->buf_len);
 68 8a35f56c 2022-07-16 thomas 
 69 8a35f56c 2022-07-16 thomas 	switch (n) {
 70 8a35f56c 2022-07-16 thomas 	case -1:
 71 8a35f56c 2022-07-16 thomas 		switch (errno) {
 72 8a35f56c 2022-07-16 thomas 		case EINTR:
 73 8a35f56c 2022-07-16 thomas 		case EAGAIN:
 74 8a35f56c 2022-07-16 thomas 			return;
 75 8a35f56c 2022-07-16 thomas 		default:
 76 8a35f56c 2022-07-16 thomas 			goto fail;
 77 8a35f56c 2022-07-16 thomas 		}
 78 8a35f56c 2022-07-16 thomas 		break;
 79 8a35f56c 2022-07-16 thomas 
 80 8a35f56c 2022-07-16 thomas 	case 0:
 81 8a35f56c 2022-07-16 thomas 		log_debug("closed connection");
 82 8a35f56c 2022-07-16 thomas 		goto fail;
 83 8a35f56c 2022-07-16 thomas 	default:
 84 8a35f56c 2022-07-16 thomas 		break;
 85 8a35f56c 2022-07-16 thomas 	}
 86 8a35f56c 2022-07-16 thomas 
 87 8a35f56c 2022-07-16 thomas 	c->buf_len += n;
 88 8a35f56c 2022-07-16 thomas 
 89 8a35f56c 2022-07-16 thomas 	/*
 90 8a35f56c 2022-07-16 thomas 	 * Parse the records as they are received. Per the FastCGI
 91 8a35f56c 2022-07-16 thomas 	 * specification, the server need only receive the FastCGI
 92 8a35f56c 2022-07-16 thomas 	 * parameter records in full; it is free to begin execution
 93 8a35f56c 2022-07-16 thomas 	 * at that point, which is what happens here.
 94 8a35f56c 2022-07-16 thomas 	 */
 95 8a35f56c 2022-07-16 thomas 	do {
 96 8a35f56c 2022-07-16 thomas 		parsed = fcgi_parse_record(c->buf + c->buf_pos, c->buf_len, c);
 97 8a35f56c 2022-07-16 thomas 		if (parsed != 0) {
 98 8a35f56c 2022-07-16 thomas 			c->buf_pos += parsed;
 99 8a35f56c 2022-07-16 thomas 			c->buf_len -= parsed;
100 8a35f56c 2022-07-16 thomas 		}
101 8a35f56c 2022-07-16 thomas 
102 2e9bd5cb 2023-03-10 thomas 		/* drop the parsed record */
103 2e9bd5cb 2023-03-10 thomas 		if (parsed != 0 && c->buf_len > 0) {
104 8a35f56c 2022-07-16 thomas 			bcopy(c->buf + c->buf_pos, c->buf, c->buf_len);
105 8a35f56c 2022-07-16 thomas 			c->buf_pos = 0;
106 8a35f56c 2022-07-16 thomas 		}
107 2e9bd5cb 2023-03-10 thomas 	} while (parsed > 0 && c->buf_len > 0);
108 2e9bd5cb 2023-03-10 thomas 
109 8a35f56c 2022-07-16 thomas 	return;
110 8a35f56c 2022-07-16 thomas fail:
111 8a35f56c 2022-07-16 thomas 	fcgi_cleanup_request(c);
112 8a35f56c 2022-07-16 thomas }
113 8a35f56c 2022-07-16 thomas 
114 8a35f56c 2022-07-16 thomas size_t
115 8a35f56c 2022-07-16 thomas fcgi_parse_record(uint8_t *buf, size_t n, struct request *c)
116 8a35f56c 2022-07-16 thomas {
117 8a35f56c 2022-07-16 thomas 	struct fcgi_record_header *h;
118 8a35f56c 2022-07-16 thomas 
119 8a35f56c 2022-07-16 thomas 	if (n < sizeof(struct fcgi_record_header))
120 8a35f56c 2022-07-16 thomas 		 return 0;
121 8a35f56c 2022-07-16 thomas 
122 8a35f56c 2022-07-16 thomas 	h = (struct fcgi_record_header*) buf;
123 8a35f56c 2022-07-16 thomas 
124 8a35f56c 2022-07-16 thomas 	dump_fcgi_record("", h);
125 8a35f56c 2022-07-16 thomas 
126 8a35f56c 2022-07-16 thomas 	if (n < sizeof(struct fcgi_record_header) + ntohs(h->content_len)
127 8a35f56c 2022-07-16 thomas 	    + h->padding_len)
128 8a35f56c 2022-07-16 thomas 		 return 0;
129 8a35f56c 2022-07-16 thomas 
130 8a35f56c 2022-07-16 thomas 	if (h->version != 1)
131 8a35f56c 2022-07-16 thomas 		log_warn("wrong version");
132 8a35f56c 2022-07-16 thomas 
133 8a35f56c 2022-07-16 thomas 	switch (h->type) {
134 8a35f56c 2022-07-16 thomas 	case FCGI_BEGIN_REQUEST:
135 8a35f56c 2022-07-16 thomas 		fcgi_parse_begin_request(buf +
136 8a35f56c 2022-07-16 thomas 		    sizeof(struct fcgi_record_header),
137 8a35f56c 2022-07-16 thomas 		    ntohs(h->content_len), c, ntohs(h->id));
138 8a35f56c 2022-07-16 thomas 		break;
139 8a35f56c 2022-07-16 thomas 	case FCGI_PARAMS:
140 8a35f56c 2022-07-16 thomas 		fcgi_parse_params(buf + sizeof(struct fcgi_record_header),
141 8a35f56c 2022-07-16 thomas 		    ntohs(h->content_len), c, ntohs(h->id));
142 8a35f56c 2022-07-16 thomas 		break;
143 8a35f56c 2022-07-16 thomas 	case FCGI_STDIN:
144 8a35f56c 2022-07-16 thomas 	case FCGI_ABORT_REQUEST:
145 e5539f76 2022-08-10 thomas 		if (c->sock->client_status != CLIENT_DISCONNECT &&
146 e5539f76 2022-08-10 thomas 		    c->outbuf_len != 0) {
147 e5539f76 2022-08-10 thomas 			fcgi_send_response(c, FCGI_STDOUT, c->outbuf,
148 e5539f76 2022-08-10 thomas 			    c->outbuf_len);
149 e5539f76 2022-08-10 thomas 		}
150 e5539f76 2022-08-10 thomas 
151 8a35f56c 2022-07-16 thomas 		fcgi_create_end_record(c);
152 8a35f56c 2022-07-16 thomas 		fcgi_cleanup_request(c);
153 8a35f56c 2022-07-16 thomas 		return 0;
154 8a35f56c 2022-07-16 thomas 	default:
155 8a35f56c 2022-07-16 thomas 		log_warn("unimplemented type %d", h->type);
156 8a35f56c 2022-07-16 thomas 		break;
157 8a35f56c 2022-07-16 thomas 	}
158 8a35f56c 2022-07-16 thomas 
159 8a35f56c 2022-07-16 thomas 	return (sizeof(struct fcgi_record_header) + ntohs(h->content_len)
160 8a35f56c 2022-07-16 thomas 	    + h->padding_len);
161 8a35f56c 2022-07-16 thomas }
162 8a35f56c 2022-07-16 thomas 
163 8a35f56c 2022-07-16 thomas void
164 8a35f56c 2022-07-16 thomas fcgi_parse_begin_request(uint8_t *buf, uint16_t n,
165 8a35f56c 2022-07-16 thomas     struct request *c, uint16_t id)
166 8a35f56c 2022-07-16 thomas {
167 8a35f56c 2022-07-16 thomas 	/* XXX -- FCGI_CANT_MPX_CONN */
168 8a35f56c 2022-07-16 thomas 	if (c->request_started) {
169 8a35f56c 2022-07-16 thomas 		log_warn("unexpected FCGI_BEGIN_REQUEST, ignoring");
170 8a35f56c 2022-07-16 thomas 		return;
171 8a35f56c 2022-07-16 thomas 	}
172 8a35f56c 2022-07-16 thomas 
173 8a35f56c 2022-07-16 thomas 	if (n != sizeof(struct fcgi_begin_request_body)) {
174 8a35f56c 2022-07-16 thomas 		log_warn("wrong size %d != %lu", n,
175 8a35f56c 2022-07-16 thomas 		    sizeof(struct fcgi_begin_request_body));
176 8a35f56c 2022-07-16 thomas 		return;
177 8a35f56c 2022-07-16 thomas 	}
178 8a35f56c 2022-07-16 thomas 
179 8a35f56c 2022-07-16 thomas 	c->request_started = 1;
180 8a35f56c 2022-07-16 thomas 	c->id = id;
181 8a35f56c 2022-07-16 thomas }
182 8a35f56c 2022-07-16 thomas 
183 8a35f56c 2022-07-16 thomas void
184 8a35f56c 2022-07-16 thomas fcgi_parse_params(uint8_t *buf, uint16_t n, struct request *c, uint16_t id)
185 8a35f56c 2022-07-16 thomas {
186 8a35f56c 2022-07-16 thomas 	uint32_t name_len, val_len;
187 4630b4b5 2022-09-01 thomas 	uint8_t *sd, *val;
188 8a35f56c 2022-07-16 thomas 
189 8a35f56c 2022-07-16 thomas 	if (!c->request_started) {
190 8a35f56c 2022-07-16 thomas 		log_warn("FCGI_PARAMS without FCGI_BEGIN_REQUEST, ignoring");
191 8a35f56c 2022-07-16 thomas 		return;
192 8a35f56c 2022-07-16 thomas 	}
193 8a35f56c 2022-07-16 thomas 
194 8a35f56c 2022-07-16 thomas 	if (c->id != id) {
195 8a35f56c 2022-07-16 thomas 		log_warn("unexpected id, ignoring");
196 8a35f56c 2022-07-16 thomas 		return;
197 8a35f56c 2022-07-16 thomas 	}
198 8a35f56c 2022-07-16 thomas 
199 8a35f56c 2022-07-16 thomas 	if (n == 0) {
200 8a35f56c 2022-07-16 thomas 		gotweb_process_request(c);
201 8a35f56c 2022-07-16 thomas 		return;
202 8a35f56c 2022-07-16 thomas 	}
203 8a35f56c 2022-07-16 thomas 
204 8a35f56c 2022-07-16 thomas 	while (n > 0) {
205 8a35f56c 2022-07-16 thomas 		if (buf[0] >> 7 == 0) {
206 8a35f56c 2022-07-16 thomas 			name_len = buf[0];
207 8a35f56c 2022-07-16 thomas 			n--;
208 8a35f56c 2022-07-16 thomas 			buf++;
209 8a35f56c 2022-07-16 thomas 		} else {
210 8a35f56c 2022-07-16 thomas 			if (n > 3) {
211 8a35f56c 2022-07-16 thomas 				name_len = ((buf[0] & 0x7f) << 24) +
212 8a35f56c 2022-07-16 thomas 				    (buf[1] << 16) + (buf[2] << 8) + buf[3];
213 8a35f56c 2022-07-16 thomas 				n -= 4;
214 8a35f56c 2022-07-16 thomas 				buf += 4;
215 8a35f56c 2022-07-16 thomas 			} else
216 8a35f56c 2022-07-16 thomas 				return;
217 8a35f56c 2022-07-16 thomas 		}
218 8a35f56c 2022-07-16 thomas 
219 4630b4b5 2022-09-01 thomas 		if (n == 0)
220 8a35f56c 2022-07-16 thomas 			return;
221 8a35f56c 2022-07-16 thomas 
222 4630b4b5 2022-09-01 thomas 		if (buf[0] >> 7 == 0) {
223 4630b4b5 2022-09-01 thomas 			val_len = buf[0];
224 4630b4b5 2022-09-01 thomas 			n--;
225 4630b4b5 2022-09-01 thomas 			buf++;
226 4630b4b5 2022-09-01 thomas 		} else {
227 4630b4b5 2022-09-01 thomas 			if (n > 3) {
228 4630b4b5 2022-09-01 thomas 				val_len = ((buf[0] & 0x7f) << 24) +
229 4630b4b5 2022-09-01 thomas 					(buf[1] << 16) + (buf[2] << 8) +
230 4630b4b5 2022-09-01 thomas 					buf[3];
231 4630b4b5 2022-09-01 thomas 				n -= 4;
232 4630b4b5 2022-09-01 thomas 				buf += 4;
233 4630b4b5 2022-09-01 thomas 			} else
234 4630b4b5 2022-09-01 thomas 				return;
235 8a35f56c 2022-07-16 thomas 		}
236 8a35f56c 2022-07-16 thomas 
237 4630b4b5 2022-09-01 thomas 		if (n < name_len + val_len)
238 8a35f56c 2022-07-16 thomas 			return;
239 8a35f56c 2022-07-16 thomas 
240 4630b4b5 2022-09-01 thomas 		val = buf + name_len;
241 8a35f56c 2022-07-16 thomas 
242 4630b4b5 2022-09-01 thomas 		if (c->querystring[0] == '\0' &&
243 4630b4b5 2022-09-01 thomas 		    val_len < MAX_QUERYSTRING &&
244 4630b4b5 2022-09-01 thomas 		    name_len == 12 &&
245 4630b4b5 2022-09-01 thomas 		    strncmp(buf, "QUERY_STRING", 12) == 0) {
246 4630b4b5 2022-09-01 thomas 			memcpy(c->querystring, val, val_len);
247 8a35f56c 2022-07-16 thomas 			c->querystring[val_len] = '\0';
248 8a35f56c 2022-07-16 thomas 		}
249 8a35f56c 2022-07-16 thomas 
250 4630b4b5 2022-09-01 thomas 		if (c->http_host[0] == '\0' &&
251 4630b4b5 2022-09-01 thomas 		    val_len < GOTWEBD_MAXTEXT &&
252 4630b4b5 2022-09-01 thomas 		    name_len == 9 &&
253 4630b4b5 2022-09-01 thomas 		    strncmp(buf, "HTTP_HOST", 9) == 0) {
254 4630b4b5 2022-09-01 thomas 			memcpy(c->http_host, val, val_len);
255 4630b4b5 2022-09-01 thomas 			c->http_host[val_len] = '\0';
256 4630b4b5 2022-09-01 thomas 
257 8a35f56c 2022-07-16 thomas 			/*
258 8a35f56c 2022-07-16 thomas 			 * lazily get subdomain
259 8a35f56c 2022-07-16 thomas 			 * will only get domain if no subdomain exists
260 8a35f56c 2022-07-16 thomas 			 * this can still work if gotweb server name is the same
261 8a35f56c 2022-07-16 thomas 			 */
262 4630b4b5 2022-09-01 thomas 			sd = strchr(c->http_host, '.');
263 8a35f56c 2022-07-16 thomas 			if (sd)
264 8a35f56c 2022-07-16 thomas 				*sd = '\0';
265 8a35f56c 2022-07-16 thomas 		}
266 4630b4b5 2022-09-01 thomas 
267 3191e256 2022-12-30 thomas 		if (c->document_uri[0] == '\0' &&
268 3191e256 2022-12-30 thomas 		    val_len < MAX_DOCUMENT_URI &&
269 3191e256 2022-12-30 thomas 		    name_len == 12 &&
270 3191e256 2022-12-30 thomas 		    strncmp(buf, "DOCUMENT_URI", 12) == 0) {
271 3191e256 2022-12-30 thomas 			memcpy(c->document_uri, val, val_len);
272 3191e256 2022-12-30 thomas 			c->document_uri[val_len] = '\0';
273 8a35f56c 2022-07-16 thomas 		}
274 4630b4b5 2022-09-01 thomas 
275 4630b4b5 2022-09-01 thomas 		if (c->server_name[0] == '\0' &&
276 4630b4b5 2022-09-01 thomas 		    val_len < MAX_SERVER_NAME &&
277 4630b4b5 2022-09-01 thomas 		    name_len == 11 &&
278 4630b4b5 2022-09-01 thomas 		    strncmp(buf, "SERVER_NAME", 11) == 0) {
279 4630b4b5 2022-09-01 thomas 			memcpy(c->server_name, val, val_len);
280 8a35f56c 2022-07-16 thomas 			c->server_name[val_len] = '\0';
281 8a35f56c 2022-07-16 thomas 		}
282 d6795e9f 2022-12-30 thomas 
283 d6795e9f 2022-12-30 thomas 		if (name_len == 5 &&
284 d6795e9f 2022-12-30 thomas 		    strncmp(buf, "HTTPS", 5) == 0)
285 d6795e9f 2022-12-30 thomas 			c->https = 1;
286 8a35f56c 2022-07-16 thomas 
287 4630b4b5 2022-09-01 thomas 		buf += name_len + val_len;
288 4630b4b5 2022-09-01 thomas 		n -= name_len - val_len;
289 8a35f56c 2022-07-16 thomas 	}
290 8a35f56c 2022-07-16 thomas }
291 8a35f56c 2022-07-16 thomas 
292 8a35f56c 2022-07-16 thomas void
293 8a35f56c 2022-07-16 thomas fcgi_timeout(int fd, short events, void *arg)
294 8a35f56c 2022-07-16 thomas {
295 8a35f56c 2022-07-16 thomas 	fcgi_cleanup_request((struct request*) arg);
296 8a35f56c 2022-07-16 thomas }
297 8a35f56c 2022-07-16 thomas 
298 8a35f56c 2022-07-16 thomas int
299 e7e5fa49 2022-12-30 thomas fcgi_puts(struct template *tp, const char *str)
300 e7e5fa49 2022-12-30 thomas {
301 e7e5fa49 2022-12-30 thomas 	if (str == NULL)
302 e7e5fa49 2022-12-30 thomas 		return 0;
303 e7e5fa49 2022-12-30 thomas 	return fcgi_gen_binary_response(tp->tp_arg, str, strlen(str));
304 e7e5fa49 2022-12-30 thomas }
305 e7e5fa49 2022-12-30 thomas 
306 e7e5fa49 2022-12-30 thomas int
307 e7e5fa49 2022-12-30 thomas fcgi_putc(struct template *tp, int ch)
308 e7e5fa49 2022-12-30 thomas {
309 e7e5fa49 2022-12-30 thomas 	uint8_t c = ch;
310 e7e5fa49 2022-12-30 thomas 	return fcgi_gen_binary_response(tp->tp_arg, &c, 1);
311 e7e5fa49 2022-12-30 thomas }
312 e7e5fa49 2022-12-30 thomas 
313 e7e5fa49 2022-12-30 thomas int
314 55144267 2022-09-07 thomas fcgi_vprintf(struct request *c, const char *fmt, va_list ap)
315 79393471 2022-08-27 thomas {
316 79393471 2022-08-27 thomas 	char *str;
317 79393471 2022-08-27 thomas 	int r;
318 79393471 2022-08-27 thomas 
319 79393471 2022-08-27 thomas 	r = vasprintf(&str, fmt, ap);
320 79393471 2022-08-27 thomas 	if (r == -1) {
321 79393471 2022-08-27 thomas 		log_warn("%s: asprintf", __func__);
322 79393471 2022-08-27 thomas 		return -1;
323 79393471 2022-08-27 thomas 	}
324 79393471 2022-08-27 thomas 
325 79393471 2022-08-27 thomas 	r = fcgi_gen_binary_response(c, str, r);
326 79393471 2022-08-27 thomas 	free(str);
327 79393471 2022-08-27 thomas 	return r;
328 79393471 2022-08-27 thomas }
329 79393471 2022-08-27 thomas 
330 79393471 2022-08-27 thomas int
331 55144267 2022-09-07 thomas fcgi_printf(struct request *c, const char *fmt, ...)
332 55144267 2022-09-07 thomas {
333 55144267 2022-09-07 thomas 	va_list ap;
334 55144267 2022-09-07 thomas 	int r;
335 55144267 2022-09-07 thomas 
336 55144267 2022-09-07 thomas 	va_start(ap, fmt);
337 55144267 2022-09-07 thomas 	r = fcgi_vprintf(c, fmt, ap);
338 55144267 2022-09-07 thomas 	va_end(ap);
339 55144267 2022-09-07 thomas 
340 55144267 2022-09-07 thomas 	return r;
341 55144267 2022-09-07 thomas }
342 55144267 2022-09-07 thomas 
343 55144267 2022-09-07 thomas int
344 8a35f56c 2022-07-16 thomas fcgi_gen_binary_response(struct request *c, const uint8_t *data, int len)
345 8a35f56c 2022-07-16 thomas {
346 e5539f76 2022-08-10 thomas 	int r;
347 e5539f76 2022-08-10 thomas 
348 8a35f56c 2022-07-16 thomas 	if (c->sock->client_status == CLIENT_DISCONNECT)
349 8a35f56c 2022-07-16 thomas 		return -1;
350 8a35f56c 2022-07-16 thomas 
351 0c2c6365 2022-07-28 thomas 	if (data == NULL || len == 0)
352 8a35f56c 2022-07-16 thomas 		return 0;
353 8a35f56c 2022-07-16 thomas 
354 e5539f76 2022-08-10 thomas 	/*
355 e5539f76 2022-08-10 thomas 	 * special case: send big replies -like blobs- directly
356 e5539f76 2022-08-10 thomas 	 * without copying.
357 e5539f76 2022-08-10 thomas 	 */
358 e5539f76 2022-08-10 thomas 	if (len > sizeof(c->outbuf)) {
359 e5539f76 2022-08-10 thomas 		if (c->outbuf_len > 0) {
360 e5539f76 2022-08-10 thomas 			fcgi_send_response(c, FCGI_STDOUT,
361 e5539f76 2022-08-10 thomas 			    c->outbuf, c->outbuf_len);
362 e5539f76 2022-08-10 thomas 			c->outbuf_len = 0;
363 e5539f76 2022-08-10 thomas 		}
364 e5539f76 2022-08-10 thomas 		return fcgi_send_response(c, FCGI_STDOUT, data, len);
365 e5539f76 2022-08-10 thomas 	}
366 e5539f76 2022-08-10 thomas 
367 e5539f76 2022-08-10 thomas 	if (len < sizeof(c->outbuf) - c->outbuf_len) {
368 e5539f76 2022-08-10 thomas 		memcpy(c->outbuf + c->outbuf_len, data, len);
369 e5539f76 2022-08-10 thomas 		c->outbuf_len += len;
370 e5539f76 2022-08-10 thomas 		return 0;
371 e5539f76 2022-08-10 thomas 	}
372 e5539f76 2022-08-10 thomas 
373 e5539f76 2022-08-10 thomas 	r = fcgi_send_response(c, FCGI_STDOUT, c->outbuf, c->outbuf_len);
374 e5539f76 2022-08-10 thomas 	if (r == -1)
375 e5539f76 2022-08-10 thomas 		return -1;
376 e5539f76 2022-08-10 thomas 
377 e5539f76 2022-08-10 thomas 	memcpy(c->outbuf, data, len);
378 e5539f76 2022-08-10 thomas 	c->outbuf_len = len;
379 8a35f56c 2022-07-16 thomas 	return 0;
380 8a35f56c 2022-07-16 thomas }
381 8a35f56c 2022-07-16 thomas 
382 e5539f76 2022-08-10 thomas static int
383 0335d24d 2022-08-06 thomas send_response(struct request *c, int type, const uint8_t *data,
384 0335d24d 2022-08-06 thomas     size_t len)
385 8a35f56c 2022-07-16 thomas {
386 0335d24d 2022-08-06 thomas 	static const uint8_t padding[FCGI_PADDING_SIZE];
387 0335d24d 2022-08-06 thomas 	struct fcgi_record_header header;
388 0335d24d 2022-08-06 thomas 	struct iovec iov[3];
389 8a35f56c 2022-07-16 thomas 	struct timespec ts;
390 a5a99557 2022-07-29 thomas 	ssize_t nw;
391 0335d24d 2022-08-06 thomas 	size_t padded_len, tot;
392 0335d24d 2022-08-06 thomas 	int i, err = 0, th = 2000;
393 8a35f56c 2022-07-16 thomas 
394 8a35f56c 2022-07-16 thomas 	ts.tv_sec = 0;
395 8a35f56c 2022-07-16 thomas 	ts.tv_nsec = 50;
396 8a35f56c 2022-07-16 thomas 
397 0335d24d 2022-08-06 thomas 	memset(&header, 0, sizeof(header));
398 0335d24d 2022-08-06 thomas 	header.version = 1;
399 0335d24d 2022-08-06 thomas 	header.type = type;
400 0335d24d 2022-08-06 thomas 	header.id = htons(c->id);
401 0335d24d 2022-08-06 thomas 	header.content_len = htons(len);
402 8a35f56c 2022-07-16 thomas 
403 8a35f56c 2022-07-16 thomas 	/* The FastCGI spec suggests to align the output buffer */
404 0335d24d 2022-08-06 thomas 	tot = sizeof(header) + len;
405 0335d24d 2022-08-06 thomas 	padded_len = FCGI_ALIGN(tot);
406 0335d24d 2022-08-06 thomas 	if (padded_len > tot) {
407 0335d24d 2022-08-06 thomas 		header.padding_len = padded_len - tot;
408 0335d24d 2022-08-06 thomas 		tot += header.padding_len;
409 8a35f56c 2022-07-16 thomas 	}
410 8a35f56c 2022-07-16 thomas 
411 0335d24d 2022-08-06 thomas 	iov[0].iov_base = &header;
412 0335d24d 2022-08-06 thomas 	iov[0].iov_len = sizeof(header);
413 8a35f56c 2022-07-16 thomas 
414 0335d24d 2022-08-06 thomas 	iov[1].iov_base = (void *)data;
415 0335d24d 2022-08-06 thomas 	iov[1].iov_len = len;
416 0335d24d 2022-08-06 thomas 
417 0335d24d 2022-08-06 thomas 	iov[2].iov_base = (void *)padding;
418 0335d24d 2022-08-06 thomas 	iov[2].iov_len = header.padding_len;
419 0335d24d 2022-08-06 thomas 
420 0335d24d 2022-08-06 thomas 	dump_fcgi_record("resp ", &header);
421 0335d24d 2022-08-06 thomas 
422 8a35f56c 2022-07-16 thomas 	/*
423 8a35f56c 2022-07-16 thomas 	 * XXX: add some simple write heuristics here
424 8a35f56c 2022-07-16 thomas 	 * On slower VMs, spotty connections, etc., we don't want to go right to
425 8a35f56c 2022-07-16 thomas 	 * disconnect. Let's at least try to write the data a few times before
426 8a35f56c 2022-07-16 thomas 	 * giving up.
427 8a35f56c 2022-07-16 thomas 	 */
428 0335d24d 2022-08-06 thomas 	while (tot > 0) {
429 0335d24d 2022-08-06 thomas 		nw = writev(c->fd, iov, nitems(iov));
430 a5a99557 2022-07-29 thomas 		if (nw == 0) {
431 a5a99557 2022-07-29 thomas 			c->sock->client_status = CLIENT_DISCONNECT;
432 a5a99557 2022-07-29 thomas 			break;
433 a5a99557 2022-07-29 thomas 		}
434 a5a99557 2022-07-29 thomas 		if (nw == -1) {
435 a5a99557 2022-07-29 thomas 			err++;
436 a5a99557 2022-07-29 thomas 			if (errno == EAGAIN && err < th) {
437 a5a99557 2022-07-29 thomas 				nanosleep(&ts, NULL);
438 a5a99557 2022-07-29 thomas 				continue;
439 a5a99557 2022-07-29 thomas 			}
440 460244b7 2022-07-29 thomas 			log_warn("%s: write failure", __func__);
441 8a35f56c 2022-07-16 thomas 			c->sock->client_status = CLIENT_DISCONNECT;
442 e5539f76 2022-08-10 thomas 			return -1;
443 8a35f56c 2022-07-16 thomas 		}
444 a5a99557 2022-07-29 thomas 
445 0335d24d 2022-08-06 thomas 		if (nw != tot)
446 0335d24d 2022-08-06 thomas 			log_debug("%s: partial write: %zu vs %zu", __func__,
447 0335d24d 2022-08-06 thomas 			    nw, tot);
448 0335d24d 2022-08-06 thomas 
449 0335d24d 2022-08-06 thomas 		tot -= nw;
450 0335d24d 2022-08-06 thomas 		for (i = 0; i < nitems(iov); ++i) {
451 0335d24d 2022-08-06 thomas 			if (nw < iov[i].iov_len) {
452 0335d24d 2022-08-06 thomas 				iov[i].iov_base += nw;
453 0335d24d 2022-08-06 thomas 				iov[i].iov_len -= nw;
454 0335d24d 2022-08-06 thomas 				break;
455 0335d24d 2022-08-06 thomas 			}
456 0335d24d 2022-08-06 thomas 			nw -= iov[i].iov_len;
457 0335d24d 2022-08-06 thomas 			iov[i].iov_len = 0;
458 0335d24d 2022-08-06 thomas 		}
459 8a35f56c 2022-07-16 thomas 	}
460 e5539f76 2022-08-10 thomas 
461 e5539f76 2022-08-10 thomas 	return 0;
462 0335d24d 2022-08-06 thomas }
463 8a35f56c 2022-07-16 thomas 
464 e5539f76 2022-08-10 thomas int
465 0335d24d 2022-08-06 thomas fcgi_send_response(struct request *c, int type, const void *data,
466 0335d24d 2022-08-06 thomas     size_t len)
467 0335d24d 2022-08-06 thomas {
468 e5539f76 2022-08-10 thomas 	if (c->sock->client_status == CLIENT_DISCONNECT)
469 e5539f76 2022-08-10 thomas 		return -1;
470 e5539f76 2022-08-10 thomas 
471 0335d24d 2022-08-06 thomas 	while (len > FCGI_CONTENT_SIZE) {
472 e5539f76 2022-08-10 thomas 		if (send_response(c, type, data, len) == -1)
473 e5539f76 2022-08-10 thomas 			return -1;
474 0335d24d 2022-08-06 thomas 
475 0335d24d 2022-08-06 thomas 		data += FCGI_CONTENT_SIZE;
476 0335d24d 2022-08-06 thomas 		len -= FCGI_CONTENT_SIZE;
477 0335d24d 2022-08-06 thomas 	}
478 0335d24d 2022-08-06 thomas 
479 0335d24d 2022-08-06 thomas 	if (len == 0)
480 e5539f76 2022-08-10 thomas 		return 0;
481 0335d24d 2022-08-06 thomas 
482 e5539f76 2022-08-10 thomas 	return send_response(c, type, data, len);
483 8a35f56c 2022-07-16 thomas }
484 8a35f56c 2022-07-16 thomas 
485 8a35f56c 2022-07-16 thomas void
486 8a35f56c 2022-07-16 thomas fcgi_create_end_record(struct request *c)
487 8a35f56c 2022-07-16 thomas {
488 0335d24d 2022-08-06 thomas 	struct fcgi_end_request_body end_request;
489 8a35f56c 2022-07-16 thomas 
490 0335d24d 2022-08-06 thomas 	memset(&end_request, 0, sizeof(end_request));
491 0335d24d 2022-08-06 thomas 	end_request.app_status = htonl(0); /* script status */
492 0335d24d 2022-08-06 thomas 	end_request.protocol_status = FCGI_REQUEST_COMPLETE;
493 0335d24d 2022-08-06 thomas 
494 0335d24d 2022-08-06 thomas 	fcgi_send_response(c, FCGI_END_REQUEST, &end_request,
495 0335d24d 2022-08-06 thomas 	    sizeof(end_request));
496 8a35f56c 2022-07-16 thomas }
497 8a35f56c 2022-07-16 thomas 
498 8a35f56c 2022-07-16 thomas void
499 8a35f56c 2022-07-16 thomas fcgi_cleanup_request(struct request *c)
500 8a35f56c 2022-07-16 thomas {
501 8a35f56c 2022-07-16 thomas 	cgi_inflight--;
502 8a35f56c 2022-07-16 thomas 	client_cnt--;
503 8a35f56c 2022-07-16 thomas 
504 8a35f56c 2022-07-16 thomas 	evtimer_del(&c->tmo);
505 8a35f56c 2022-07-16 thomas 	if (event_initialized(&c->ev))
506 8a35f56c 2022-07-16 thomas 		event_del(&c->ev);
507 8a35f56c 2022-07-16 thomas 
508 8a35f56c 2022-07-16 thomas 	close(c->fd);
509 e7e5fa49 2022-12-30 thomas 	template_free(c->tp);
510 2e9bd5cb 2023-03-10 thomas 	if (c->t != NULL)
511 2e9bd5cb 2023-03-10 thomas 		gotweb_free_transport(c->t);
512 8a35f56c 2022-07-16 thomas 	free(c);
513 8a35f56c 2022-07-16 thomas }
514 8a35f56c 2022-07-16 thomas 
515 8a35f56c 2022-07-16 thomas void
516 8a35f56c 2022-07-16 thomas dump_fcgi_record(const char *p, struct fcgi_record_header *h)
517 8a35f56c 2022-07-16 thomas {
518 8a35f56c 2022-07-16 thomas 	dump_fcgi_record_header(p, h);
519 8a35f56c 2022-07-16 thomas 
520 8a35f56c 2022-07-16 thomas 	if (h->type == FCGI_BEGIN_REQUEST)
521 8a35f56c 2022-07-16 thomas 		dump_fcgi_begin_request_body(p,
522 8a35f56c 2022-07-16 thomas 		    (struct fcgi_begin_request_body *)(h + 1));
523 8a35f56c 2022-07-16 thomas 	else if (h->type == FCGI_END_REQUEST)
524 8a35f56c 2022-07-16 thomas 		dump_fcgi_end_request_body(p,
525 8a35f56c 2022-07-16 thomas 		    (struct fcgi_end_request_body *)(h + 1));
526 8a35f56c 2022-07-16 thomas }
527 8a35f56c 2022-07-16 thomas 
528 8a35f56c 2022-07-16 thomas void
529 8a35f56c 2022-07-16 thomas dump_fcgi_record_header(const char* p, struct fcgi_record_header *h)
530 8a35f56c 2022-07-16 thomas {
531 8a35f56c 2022-07-16 thomas 	log_debug("%sversion:         %d", p, h->version);
532 8a35f56c 2022-07-16 thomas 	log_debug("%stype:            %d", p, h->type);
533 8a35f56c 2022-07-16 thomas 	log_debug("%srequestId:       %d", p, ntohs(h->id));
534 8a35f56c 2022-07-16 thomas 	log_debug("%scontentLength:   %d", p, ntohs(h->content_len));
535 8a35f56c 2022-07-16 thomas 	log_debug("%spaddingLength:   %d", p, h->padding_len);
536 8a35f56c 2022-07-16 thomas 	log_debug("%sreserved:        %d", p, h->reserved);
537 8a35f56c 2022-07-16 thomas }
538 8a35f56c 2022-07-16 thomas 
539 8a35f56c 2022-07-16 thomas void
540 8a35f56c 2022-07-16 thomas dump_fcgi_begin_request_body(const char *p, struct fcgi_begin_request_body *b)
541 8a35f56c 2022-07-16 thomas {
542 8a35f56c 2022-07-16 thomas 	log_debug("%srole             %d", p, ntohs(b->role));
543 8a35f56c 2022-07-16 thomas 	log_debug("%sflags            %d", p, b->flags);
544 8a35f56c 2022-07-16 thomas }
545 8a35f56c 2022-07-16 thomas 
546 8a35f56c 2022-07-16 thomas void
547 8a35f56c 2022-07-16 thomas dump_fcgi_end_request_body(const char *p, struct fcgi_end_request_body *b)
548 8a35f56c 2022-07-16 thomas {
549 8a35f56c 2022-07-16 thomas 	log_debug("%sappStatus:       %d", p, ntohl(b->app_status));
550 8a35f56c 2022-07-16 thomas 	log_debug("%sprotocolStatus:  %d", p, b->protocol_status);
551 8a35f56c 2022-07-16 thomas }