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 8a35f56c 2022-07-16 thomas 		fcgi_create_end_record(c);
146 8a35f56c 2022-07-16 thomas 		fcgi_cleanup_request(c);
147 8a35f56c 2022-07-16 thomas 		return 0;
148 8a35f56c 2022-07-16 thomas 	default:
149 8a35f56c 2022-07-16 thomas 		log_warn("unimplemented type %d", h->type);
150 8a35f56c 2022-07-16 thomas 		break;
151 8a35f56c 2022-07-16 thomas 	}
152 8a35f56c 2022-07-16 thomas 
153 8a35f56c 2022-07-16 thomas 	return (sizeof(struct fcgi_record_header) + ntohs(h->content_len)
154 8a35f56c 2022-07-16 thomas 	    + h->padding_len);
155 8a35f56c 2022-07-16 thomas }
156 8a35f56c 2022-07-16 thomas 
157 8a35f56c 2022-07-16 thomas void
158 8a35f56c 2022-07-16 thomas fcgi_parse_begin_request(uint8_t *buf, uint16_t n,
159 8a35f56c 2022-07-16 thomas     struct request *c, uint16_t id)
160 8a35f56c 2022-07-16 thomas {
161 8a35f56c 2022-07-16 thomas 	/* XXX -- FCGI_CANT_MPX_CONN */
162 8a35f56c 2022-07-16 thomas 	if (c->request_started) {
163 8a35f56c 2022-07-16 thomas 		log_warn("unexpected FCGI_BEGIN_REQUEST, ignoring");
164 8a35f56c 2022-07-16 thomas 		return;
165 8a35f56c 2022-07-16 thomas 	}
166 8a35f56c 2022-07-16 thomas 
167 8a35f56c 2022-07-16 thomas 	if (n != sizeof(struct fcgi_begin_request_body)) {
168 8a35f56c 2022-07-16 thomas 		log_warn("wrong size %d != %lu", n,
169 8a35f56c 2022-07-16 thomas 		    sizeof(struct fcgi_begin_request_body));
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 	c->request_started = 1;
174 8a35f56c 2022-07-16 thomas 	c->id = id;
175 8a35f56c 2022-07-16 thomas }
176 8a35f56c 2022-07-16 thomas 
177 8a35f56c 2022-07-16 thomas void
178 8a35f56c 2022-07-16 thomas fcgi_parse_params(uint8_t *buf, uint16_t n, struct request *c, uint16_t id)
179 8a35f56c 2022-07-16 thomas {
180 8a35f56c 2022-07-16 thomas 	uint32_t name_len, val_len;
181 b95d1cf6 2023-06-25 thomas 	uint8_t *val;
182 8a35f56c 2022-07-16 thomas 
183 8a35f56c 2022-07-16 thomas 	if (!c->request_started) {
184 8a35f56c 2022-07-16 thomas 		log_warn("FCGI_PARAMS without FCGI_BEGIN_REQUEST, ignoring");
185 8a35f56c 2022-07-16 thomas 		return;
186 8a35f56c 2022-07-16 thomas 	}
187 8a35f56c 2022-07-16 thomas 
188 8a35f56c 2022-07-16 thomas 	if (c->id != id) {
189 8a35f56c 2022-07-16 thomas 		log_warn("unexpected id, ignoring");
190 8a35f56c 2022-07-16 thomas 		return;
191 8a35f56c 2022-07-16 thomas 	}
192 8a35f56c 2022-07-16 thomas 
193 8a35f56c 2022-07-16 thomas 	if (n == 0) {
194 8a35f56c 2022-07-16 thomas 		gotweb_process_request(c);
195 d8bf4f25 2023-09-14 thomas 		template_flush(c->tp);
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 	while (n > 0) {
200 8a35f56c 2022-07-16 thomas 		if (buf[0] >> 7 == 0) {
201 8a35f56c 2022-07-16 thomas 			name_len = buf[0];
202 8a35f56c 2022-07-16 thomas 			n--;
203 8a35f56c 2022-07-16 thomas 			buf++;
204 8a35f56c 2022-07-16 thomas 		} else {
205 8a35f56c 2022-07-16 thomas 			if (n > 3) {
206 8a35f56c 2022-07-16 thomas 				name_len = ((buf[0] & 0x7f) << 24) +
207 8a35f56c 2022-07-16 thomas 				    (buf[1] << 16) + (buf[2] << 8) + buf[3];
208 8a35f56c 2022-07-16 thomas 				n -= 4;
209 8a35f56c 2022-07-16 thomas 				buf += 4;
210 8a35f56c 2022-07-16 thomas 			} else
211 8a35f56c 2022-07-16 thomas 				return;
212 8a35f56c 2022-07-16 thomas 		}
213 8a35f56c 2022-07-16 thomas 
214 4630b4b5 2022-09-01 thomas 		if (n == 0)
215 8a35f56c 2022-07-16 thomas 			return;
216 8a35f56c 2022-07-16 thomas 
217 4630b4b5 2022-09-01 thomas 		if (buf[0] >> 7 == 0) {
218 4630b4b5 2022-09-01 thomas 			val_len = buf[0];
219 4630b4b5 2022-09-01 thomas 			n--;
220 4630b4b5 2022-09-01 thomas 			buf++;
221 4630b4b5 2022-09-01 thomas 		} else {
222 4630b4b5 2022-09-01 thomas 			if (n > 3) {
223 4630b4b5 2022-09-01 thomas 				val_len = ((buf[0] & 0x7f) << 24) +
224 4630b4b5 2022-09-01 thomas 					(buf[1] << 16) + (buf[2] << 8) +
225 4630b4b5 2022-09-01 thomas 					buf[3];
226 4630b4b5 2022-09-01 thomas 				n -= 4;
227 4630b4b5 2022-09-01 thomas 				buf += 4;
228 4630b4b5 2022-09-01 thomas 			} else
229 4630b4b5 2022-09-01 thomas 				return;
230 8a35f56c 2022-07-16 thomas 		}
231 8a35f56c 2022-07-16 thomas 
232 4630b4b5 2022-09-01 thomas 		if (n < name_len + val_len)
233 8a35f56c 2022-07-16 thomas 			return;
234 8a35f56c 2022-07-16 thomas 
235 4630b4b5 2022-09-01 thomas 		val = buf + name_len;
236 8a35f56c 2022-07-16 thomas 
237 4630b4b5 2022-09-01 thomas 		if (c->querystring[0] == '\0' &&
238 4630b4b5 2022-09-01 thomas 		    val_len < MAX_QUERYSTRING &&
239 4630b4b5 2022-09-01 thomas 		    name_len == 12 &&
240 4630b4b5 2022-09-01 thomas 		    strncmp(buf, "QUERY_STRING", 12) == 0) {
241 4630b4b5 2022-09-01 thomas 			memcpy(c->querystring, val, val_len);
242 8a35f56c 2022-07-16 thomas 			c->querystring[val_len] = '\0';
243 8a35f56c 2022-07-16 thomas 		}
244 8a35f56c 2022-07-16 thomas 
245 3191e256 2022-12-30 thomas 		if (c->document_uri[0] == '\0' &&
246 3191e256 2022-12-30 thomas 		    val_len < MAX_DOCUMENT_URI &&
247 3191e256 2022-12-30 thomas 		    name_len == 12 &&
248 3191e256 2022-12-30 thomas 		    strncmp(buf, "DOCUMENT_URI", 12) == 0) {
249 3191e256 2022-12-30 thomas 			memcpy(c->document_uri, val, val_len);
250 3191e256 2022-12-30 thomas 			c->document_uri[val_len] = '\0';
251 8a35f56c 2022-07-16 thomas 		}
252 4630b4b5 2022-09-01 thomas 
253 4630b4b5 2022-09-01 thomas 		if (c->server_name[0] == '\0' &&
254 4630b4b5 2022-09-01 thomas 		    val_len < MAX_SERVER_NAME &&
255 4630b4b5 2022-09-01 thomas 		    name_len == 11 &&
256 4630b4b5 2022-09-01 thomas 		    strncmp(buf, "SERVER_NAME", 11) == 0) {
257 4630b4b5 2022-09-01 thomas 			memcpy(c->server_name, val, val_len);
258 8a35f56c 2022-07-16 thomas 			c->server_name[val_len] = '\0';
259 8a35f56c 2022-07-16 thomas 		}
260 d6795e9f 2022-12-30 thomas 
261 d6795e9f 2022-12-30 thomas 		if (name_len == 5 &&
262 d6795e9f 2022-12-30 thomas 		    strncmp(buf, "HTTPS", 5) == 0)
263 d6795e9f 2022-12-30 thomas 			c->https = 1;
264 8a35f56c 2022-07-16 thomas 
265 4630b4b5 2022-09-01 thomas 		buf += name_len + val_len;
266 4630b4b5 2022-09-01 thomas 		n -= name_len - val_len;
267 8a35f56c 2022-07-16 thomas 	}
268 8a35f56c 2022-07-16 thomas }
269 8a35f56c 2022-07-16 thomas 
270 8a35f56c 2022-07-16 thomas void
271 8a35f56c 2022-07-16 thomas fcgi_timeout(int fd, short events, void *arg)
272 8a35f56c 2022-07-16 thomas {
273 8a35f56c 2022-07-16 thomas 	fcgi_cleanup_request((struct request*) arg);
274 e7e5fa49 2022-12-30 thomas }
275 e7e5fa49 2022-12-30 thomas 
276 e5539f76 2022-08-10 thomas static int
277 0335d24d 2022-08-06 thomas send_response(struct request *c, int type, const uint8_t *data,
278 0335d24d 2022-08-06 thomas     size_t len)
279 8a35f56c 2022-07-16 thomas {
280 0335d24d 2022-08-06 thomas 	static const uint8_t padding[FCGI_PADDING_SIZE];
281 0335d24d 2022-08-06 thomas 	struct fcgi_record_header header;
282 0335d24d 2022-08-06 thomas 	struct iovec iov[3];
283 8a35f56c 2022-07-16 thomas 	struct timespec ts;
284 a5a99557 2022-07-29 thomas 	ssize_t nw;
285 0335d24d 2022-08-06 thomas 	size_t padded_len, tot;
286 0335d24d 2022-08-06 thomas 	int i, err = 0, th = 2000;
287 8a35f56c 2022-07-16 thomas 
288 8a35f56c 2022-07-16 thomas 	ts.tv_sec = 0;
289 8a35f56c 2022-07-16 thomas 	ts.tv_nsec = 50;
290 8a35f56c 2022-07-16 thomas 
291 0335d24d 2022-08-06 thomas 	memset(&header, 0, sizeof(header));
292 0335d24d 2022-08-06 thomas 	header.version = 1;
293 0335d24d 2022-08-06 thomas 	header.type = type;
294 0335d24d 2022-08-06 thomas 	header.id = htons(c->id);
295 0335d24d 2022-08-06 thomas 	header.content_len = htons(len);
296 8a35f56c 2022-07-16 thomas 
297 8a35f56c 2022-07-16 thomas 	/* The FastCGI spec suggests to align the output buffer */
298 0335d24d 2022-08-06 thomas 	tot = sizeof(header) + len;
299 0335d24d 2022-08-06 thomas 	padded_len = FCGI_ALIGN(tot);
300 0335d24d 2022-08-06 thomas 	if (padded_len > tot) {
301 0335d24d 2022-08-06 thomas 		header.padding_len = padded_len - tot;
302 0335d24d 2022-08-06 thomas 		tot += header.padding_len;
303 8a35f56c 2022-07-16 thomas 	}
304 8a35f56c 2022-07-16 thomas 
305 0335d24d 2022-08-06 thomas 	iov[0].iov_base = &header;
306 0335d24d 2022-08-06 thomas 	iov[0].iov_len = sizeof(header);
307 8a35f56c 2022-07-16 thomas 
308 0335d24d 2022-08-06 thomas 	iov[1].iov_base = (void *)data;
309 0335d24d 2022-08-06 thomas 	iov[1].iov_len = len;
310 0335d24d 2022-08-06 thomas 
311 0335d24d 2022-08-06 thomas 	iov[2].iov_base = (void *)padding;
312 0335d24d 2022-08-06 thomas 	iov[2].iov_len = header.padding_len;
313 0335d24d 2022-08-06 thomas 
314 0335d24d 2022-08-06 thomas 	dump_fcgi_record("resp ", &header);
315 0335d24d 2022-08-06 thomas 
316 8a35f56c 2022-07-16 thomas 	/*
317 8a35f56c 2022-07-16 thomas 	 * XXX: add some simple write heuristics here
318 8a35f56c 2022-07-16 thomas 	 * On slower VMs, spotty connections, etc., we don't want to go right to
319 8a35f56c 2022-07-16 thomas 	 * disconnect. Let's at least try to write the data a few times before
320 8a35f56c 2022-07-16 thomas 	 * giving up.
321 8a35f56c 2022-07-16 thomas 	 */
322 0335d24d 2022-08-06 thomas 	while (tot > 0) {
323 0335d24d 2022-08-06 thomas 		nw = writev(c->fd, iov, nitems(iov));
324 a5a99557 2022-07-29 thomas 		if (nw == 0) {
325 a5a99557 2022-07-29 thomas 			c->sock->client_status = CLIENT_DISCONNECT;
326 a5a99557 2022-07-29 thomas 			break;
327 a5a99557 2022-07-29 thomas 		}
328 a5a99557 2022-07-29 thomas 		if (nw == -1) {
329 a5a99557 2022-07-29 thomas 			err++;
330 a5a99557 2022-07-29 thomas 			if (errno == EAGAIN && err < th) {
331 a5a99557 2022-07-29 thomas 				nanosleep(&ts, NULL);
332 a5a99557 2022-07-29 thomas 				continue;
333 a5a99557 2022-07-29 thomas 			}
334 aa2aecab 2023-05-25 thomas 			log_debug("%s: write failure: %s", __func__,
335 aa2aecab 2023-05-25 thomas 			    strerror(errno));
336 8a35f56c 2022-07-16 thomas 			c->sock->client_status = CLIENT_DISCONNECT;
337 e5539f76 2022-08-10 thomas 			return -1;
338 8a35f56c 2022-07-16 thomas 		}
339 a5a99557 2022-07-29 thomas 
340 0335d24d 2022-08-06 thomas 		if (nw != tot)
341 0335d24d 2022-08-06 thomas 			log_debug("%s: partial write: %zu vs %zu", __func__,
342 0335d24d 2022-08-06 thomas 			    nw, tot);
343 0335d24d 2022-08-06 thomas 
344 0335d24d 2022-08-06 thomas 		tot -= nw;
345 0335d24d 2022-08-06 thomas 		for (i = 0; i < nitems(iov); ++i) {
346 0335d24d 2022-08-06 thomas 			if (nw < iov[i].iov_len) {
347 0335d24d 2022-08-06 thomas 				iov[i].iov_base += nw;
348 0335d24d 2022-08-06 thomas 				iov[i].iov_len -= nw;
349 0335d24d 2022-08-06 thomas 				break;
350 0335d24d 2022-08-06 thomas 			}
351 0335d24d 2022-08-06 thomas 			nw -= iov[i].iov_len;
352 0335d24d 2022-08-06 thomas 			iov[i].iov_len = 0;
353 0335d24d 2022-08-06 thomas 		}
354 8a35f56c 2022-07-16 thomas 	}
355 e5539f76 2022-08-10 thomas 
356 e5539f76 2022-08-10 thomas 	return 0;
357 0335d24d 2022-08-06 thomas }
358 8a35f56c 2022-07-16 thomas 
359 e5539f76 2022-08-10 thomas int
360 0335d24d 2022-08-06 thomas fcgi_send_response(struct request *c, int type, const void *data,
361 0335d24d 2022-08-06 thomas     size_t len)
362 0335d24d 2022-08-06 thomas {
363 e5539f76 2022-08-10 thomas 	if (c->sock->client_status == CLIENT_DISCONNECT)
364 e5539f76 2022-08-10 thomas 		return -1;
365 e5539f76 2022-08-10 thomas 
366 0335d24d 2022-08-06 thomas 	while (len > FCGI_CONTENT_SIZE) {
367 e5539f76 2022-08-10 thomas 		if (send_response(c, type, data, len) == -1)
368 e5539f76 2022-08-10 thomas 			return -1;
369 0335d24d 2022-08-06 thomas 
370 0335d24d 2022-08-06 thomas 		data += FCGI_CONTENT_SIZE;
371 0335d24d 2022-08-06 thomas 		len -= FCGI_CONTENT_SIZE;
372 0335d24d 2022-08-06 thomas 	}
373 0335d24d 2022-08-06 thomas 
374 0335d24d 2022-08-06 thomas 	if (len == 0)
375 e5539f76 2022-08-10 thomas 		return 0;
376 0335d24d 2022-08-06 thomas 
377 e5539f76 2022-08-10 thomas 	return send_response(c, type, data, len);
378 8a35f56c 2022-07-16 thomas }
379 8a35f56c 2022-07-16 thomas 
380 d8bf4f25 2023-09-14 thomas int
381 d8bf4f25 2023-09-14 thomas fcgi_write(void *arg, const void *buf, size_t len)
382 d8bf4f25 2023-09-14 thomas {
383 d8bf4f25 2023-09-14 thomas 	struct request	*c = arg;
384 d8bf4f25 2023-09-14 thomas 
385 d8bf4f25 2023-09-14 thomas 	return fcgi_send_response(c, FCGI_STDOUT, buf, len);
386 d8bf4f25 2023-09-14 thomas }
387 d8bf4f25 2023-09-14 thomas 
388 8a35f56c 2022-07-16 thomas void
389 8a35f56c 2022-07-16 thomas fcgi_create_end_record(struct request *c)
390 8a35f56c 2022-07-16 thomas {
391 0335d24d 2022-08-06 thomas 	struct fcgi_end_request_body end_request;
392 8a35f56c 2022-07-16 thomas 
393 0335d24d 2022-08-06 thomas 	memset(&end_request, 0, sizeof(end_request));
394 0335d24d 2022-08-06 thomas 	end_request.app_status = htonl(0); /* script status */
395 0335d24d 2022-08-06 thomas 	end_request.protocol_status = FCGI_REQUEST_COMPLETE;
396 0335d24d 2022-08-06 thomas 
397 0335d24d 2022-08-06 thomas 	fcgi_send_response(c, FCGI_END_REQUEST, &end_request,
398 0335d24d 2022-08-06 thomas 	    sizeof(end_request));
399 8a35f56c 2022-07-16 thomas }
400 8a35f56c 2022-07-16 thomas 
401 8a35f56c 2022-07-16 thomas void
402 8a35f56c 2022-07-16 thomas fcgi_cleanup_request(struct request *c)
403 8a35f56c 2022-07-16 thomas {
404 8a35f56c 2022-07-16 thomas 	cgi_inflight--;
405 8a35f56c 2022-07-16 thomas 	client_cnt--;
406 8a35f56c 2022-07-16 thomas 
407 8a35f56c 2022-07-16 thomas 	evtimer_del(&c->tmo);
408 8a35f56c 2022-07-16 thomas 	if (event_initialized(&c->ev))
409 8a35f56c 2022-07-16 thomas 		event_del(&c->ev);
410 8a35f56c 2022-07-16 thomas 
411 8a35f56c 2022-07-16 thomas 	close(c->fd);
412 e7e5fa49 2022-12-30 thomas 	template_free(c->tp);
413 2e9bd5cb 2023-03-10 thomas 	if (c->t != NULL)
414 2e9bd5cb 2023-03-10 thomas 		gotweb_free_transport(c->t);
415 8a35f56c 2022-07-16 thomas 	free(c);
416 8a35f56c 2022-07-16 thomas }
417 8a35f56c 2022-07-16 thomas 
418 8a35f56c 2022-07-16 thomas void
419 8a35f56c 2022-07-16 thomas dump_fcgi_record(const char *p, struct fcgi_record_header *h)
420 8a35f56c 2022-07-16 thomas {
421 8a35f56c 2022-07-16 thomas 	dump_fcgi_record_header(p, h);
422 8a35f56c 2022-07-16 thomas 
423 8a35f56c 2022-07-16 thomas 	if (h->type == FCGI_BEGIN_REQUEST)
424 8a35f56c 2022-07-16 thomas 		dump_fcgi_begin_request_body(p,
425 8a35f56c 2022-07-16 thomas 		    (struct fcgi_begin_request_body *)(h + 1));
426 8a35f56c 2022-07-16 thomas 	else if (h->type == FCGI_END_REQUEST)
427 8a35f56c 2022-07-16 thomas 		dump_fcgi_end_request_body(p,
428 8a35f56c 2022-07-16 thomas 		    (struct fcgi_end_request_body *)(h + 1));
429 8a35f56c 2022-07-16 thomas }
430 8a35f56c 2022-07-16 thomas 
431 8a35f56c 2022-07-16 thomas void
432 8a35f56c 2022-07-16 thomas dump_fcgi_record_header(const char* p, struct fcgi_record_header *h)
433 8a35f56c 2022-07-16 thomas {
434 8a35f56c 2022-07-16 thomas 	log_debug("%sversion:         %d", p, h->version);
435 8a35f56c 2022-07-16 thomas 	log_debug("%stype:            %d", p, h->type);
436 8a35f56c 2022-07-16 thomas 	log_debug("%srequestId:       %d", p, ntohs(h->id));
437 8a35f56c 2022-07-16 thomas 	log_debug("%scontentLength:   %d", p, ntohs(h->content_len));
438 8a35f56c 2022-07-16 thomas 	log_debug("%spaddingLength:   %d", p, h->padding_len);
439 8a35f56c 2022-07-16 thomas 	log_debug("%sreserved:        %d", p, h->reserved);
440 8a35f56c 2022-07-16 thomas }
441 8a35f56c 2022-07-16 thomas 
442 8a35f56c 2022-07-16 thomas void
443 8a35f56c 2022-07-16 thomas dump_fcgi_begin_request_body(const char *p, struct fcgi_begin_request_body *b)
444 8a35f56c 2022-07-16 thomas {
445 8a35f56c 2022-07-16 thomas 	log_debug("%srole             %d", p, ntohs(b->role));
446 8a35f56c 2022-07-16 thomas 	log_debug("%sflags            %d", p, b->flags);
447 8a35f56c 2022-07-16 thomas }
448 8a35f56c 2022-07-16 thomas 
449 8a35f56c 2022-07-16 thomas void
450 8a35f56c 2022-07-16 thomas dump_fcgi_end_request_body(const char *p, struct fcgi_end_request_body *b)
451 8a35f56c 2022-07-16 thomas {
452 8a35f56c 2022-07-16 thomas 	log_debug("%sappStatus:       %d", p, ntohl(b->app_status));
453 8a35f56c 2022-07-16 thomas 	log_debug("%sprotocolStatus:  %d", p, b->protocol_status);
454 8a35f56c 2022-07-16 thomas }