1 09876a9d 2024-04-25 thomas.ad /*
  2 452122e2 2024-04-25 thomas.ad  * Copyright (c) 2024 Tobias Heider <me@tobhe.de>
  3 09876a9d 2024-04-25 thomas.ad  * Copyright (c) 2022 Omar Polo <op@openbsd.org>
  4 09876a9d 2024-04-25 thomas.ad  *
  5 09876a9d 2024-04-25 thomas.ad  * Permission to use, copy, modify, and distribute this software for any
  6 09876a9d 2024-04-25 thomas.ad  * purpose with or without fee is hereby granted, provided that the above
  7 09876a9d 2024-04-25 thomas.ad  * copyright notice and this permission notice appear in all copies.
  8 09876a9d 2024-04-25 thomas.ad  *
  9 09876a9d 2024-04-25 thomas.ad  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 10 09876a9d 2024-04-25 thomas.ad  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 11 09876a9d 2024-04-25 thomas.ad  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 12 09876a9d 2024-04-25 thomas.ad  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 13 09876a9d 2024-04-25 thomas.ad  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 14 09876a9d 2024-04-25 thomas.ad  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 15 09876a9d 2024-04-25 thomas.ad  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 16 09876a9d 2024-04-25 thomas.ad  */
 17 09876a9d 2024-04-25 thomas.ad 
 18 09876a9d 2024-04-25 thomas.ad #include <sys/types.h>
 19 09876a9d 2024-04-25 thomas.ad #include <sys/socket.h>
 20 09876a9d 2024-04-25 thomas.ad 
 21 09876a9d 2024-04-25 thomas.ad #include <err.h>
 22 09876a9d 2024-04-25 thomas.ad #include <errno.h>
 23 09876a9d 2024-04-25 thomas.ad #include <limits.h>
 24 09876a9d 2024-04-25 thomas.ad #include <netdb.h>
 25 09876a9d 2024-04-25 thomas.ad #include <poll.h>
 26 09876a9d 2024-04-25 thomas.ad #include <stdio.h>
 27 09876a9d 2024-04-25 thomas.ad #include <stdlib.h>
 28 09876a9d 2024-04-25 thomas.ad #include <string.h>
 29 09876a9d 2024-04-25 thomas.ad #include <tls.h>
 30 09876a9d 2024-04-25 thomas.ad #include <unistd.h>
 31 09876a9d 2024-04-25 thomas.ad 
 32 507e5154 2024-04-25 thomas.ad #include "got_error.h"
 33 09876a9d 2024-04-25 thomas.ad #include "got_version.h"
 34 09876a9d 2024-04-25 thomas.ad 
 35 a36700cf 2024-04-25 thomas.ad #include "got_lib_pkt.h"
 36 a36700cf 2024-04-25 thomas.ad 
 37 452122e2 2024-04-25 thomas.ad #include "bufio.h"
 38 452122e2 2024-04-25 thomas.ad 
 39 09876a9d 2024-04-25 thomas.ad #define UPLOAD_PACK_ADV "application/x-git-upload-pack-advertisement"
 40 09876a9d 2024-04-25 thomas.ad #define UPLOAD_PACK_REQ "application/x-git-upload-pack-request"
 41 09876a9d 2024-04-25 thomas.ad #define UPLOAD_PACK_RES "application/x-git-upload-pack-result"
 42 09876a9d 2024-04-25 thomas.ad 
 43 09876a9d 2024-04-25 thomas.ad #define	GOT_USERAGENT	"got/" GOT_VERSION_STR
 44 09876a9d 2024-04-25 thomas.ad #define MINIMUM(a, b)	((a) < (b) ? (a) : (b))
 45 09876a9d 2024-04-25 thomas.ad #define hasprfx(str, p)	(strncasecmp(str, p, strlen(p)) == 0)
 46 09876a9d 2024-04-25 thomas.ad 
 47 09876a9d 2024-04-25 thomas.ad FILE *tmp;
 48 09876a9d 2024-04-25 thomas.ad 
 49 09876a9d 2024-04-25 thomas.ad static int	verbose;
 50 09876a9d 2024-04-25 thomas.ad 
 51 452122e2 2024-04-25 thomas.ad static char *
 52 452122e2 2024-04-25 thomas.ad bufio_getdelim_sync(struct bufio *bio, const char *nl, size_t *len)
 53 452122e2 2024-04-25 thomas.ad {
 54 452122e2 2024-04-25 thomas.ad 	int	r;
 55 452122e2 2024-04-25 thomas.ad 
 56 452122e2 2024-04-25 thomas.ad 	do {
 57 452122e2 2024-04-25 thomas.ad 		r = bufio_read(bio);
 58 452122e2 2024-04-25 thomas.ad 		if (r == -1 && errno != EAGAIN)
 59 452122e2 2024-04-25 thomas.ad 			errx(1, "bufio_read: %s", bufio_io_err(bio));
 60 452122e2 2024-04-25 thomas.ad 	} while (r == -1 && errno == EAGAIN);
 61 452122e2 2024-04-25 thomas.ad 	return buf_getdelim(&bio->rbuf, nl, len);
 62 452122e2 2024-04-25 thomas.ad }
 63 452122e2 2024-04-25 thomas.ad 
 64 452122e2 2024-04-25 thomas.ad static size_t
 65 452122e2 2024-04-25 thomas.ad bufio_drain_sync(struct bufio *bio, void *d, size_t len)
 66 452122e2 2024-04-25 thomas.ad {
 67 452122e2 2024-04-25 thomas.ad 	int	r;
 68 452122e2 2024-04-25 thomas.ad 
 69 452122e2 2024-04-25 thomas.ad 	do {
 70 452122e2 2024-04-25 thomas.ad 		r = bufio_read(bio);
 71 452122e2 2024-04-25 thomas.ad 		if (r == -1 && errno != EAGAIN)
 72 452122e2 2024-04-25 thomas.ad 			errx(1, "bufio_read: %s", bufio_io_err(bio));
 73 452122e2 2024-04-25 thomas.ad 	} while (r == -1 && errno == EAGAIN);
 74 452122e2 2024-04-25 thomas.ad 	return bufio_drain(bio, d, len);
 75 452122e2 2024-04-25 thomas.ad }
 76 452122e2 2024-04-25 thomas.ad 
 77 452122e2 2024-04-25 thomas.ad static void
 78 452122e2 2024-04-25 thomas.ad bufio_close_sync(struct bufio *bio)
 79 452122e2 2024-04-25 thomas.ad {
 80 452122e2 2024-04-25 thomas.ad 	int	 r;
 81 452122e2 2024-04-25 thomas.ad 
 82 452122e2 2024-04-25 thomas.ad 	do {
 83 452122e2 2024-04-25 thomas.ad 		r = bufio_close(bio);
 84 452122e2 2024-04-25 thomas.ad 		if (r == -1 && errno == EAGAIN)
 85 452122e2 2024-04-25 thomas.ad 			errx(1, "bufio_read: %s", bufio_io_err(bio));
 86 452122e2 2024-04-25 thomas.ad 	} while (r == -1 && errno == EAGAIN);
 87 452122e2 2024-04-25 thomas.ad }
 88 452122e2 2024-04-25 thomas.ad 
 89 09876a9d 2024-04-25 thomas.ad static long long
 90 09876a9d 2024-04-25 thomas.ad hexstrtonum(const char *str, long long min, long long max, const char **errstr)
 91 09876a9d 2024-04-25 thomas.ad {
 92 09876a9d 2024-04-25 thomas.ad 	long long	 lval;
 93 09876a9d 2024-04-25 thomas.ad 	char		*cp;
 94 09876a9d 2024-04-25 thomas.ad 
 95 09876a9d 2024-04-25 thomas.ad 	errno = 0;
 96 09876a9d 2024-04-25 thomas.ad 	lval = strtoll(str, &cp, 16);
 97 09876a9d 2024-04-25 thomas.ad 	if (*str == '\0' || *cp != '\0') {
 98 09876a9d 2024-04-25 thomas.ad 		*errstr = "not a number";
 99 09876a9d 2024-04-25 thomas.ad 		return 0;
100 09876a9d 2024-04-25 thomas.ad 	}
101 09876a9d 2024-04-25 thomas.ad 	if ((errno == ERANGE && (lval == LONG_MAX || lval == LONG_MIN)) ||
102 09876a9d 2024-04-25 thomas.ad 	    lval < min || lval > max) {
103 09876a9d 2024-04-25 thomas.ad 		*errstr = "out of range";
104 09876a9d 2024-04-25 thomas.ad 		return 0;
105 09876a9d 2024-04-25 thomas.ad 	}
106 09876a9d 2024-04-25 thomas.ad 
107 09876a9d 2024-04-25 thomas.ad 	*errstr = NULL;
108 09876a9d 2024-04-25 thomas.ad 	return lval;
109 09876a9d 2024-04-25 thomas.ad }
110 09876a9d 2024-04-25 thomas.ad 
111 09876a9d 2024-04-25 thomas.ad static int
112 09876a9d 2024-04-25 thomas.ad dial(int https, const char *host, const char *port)
113 09876a9d 2024-04-25 thomas.ad {
114 09876a9d 2024-04-25 thomas.ad 	struct addrinfo		 hints, *res, *res0;
115 452122e2 2024-04-25 thomas.ad 	int			 error, saved_errno, fd = -1;
116 09876a9d 2024-04-25 thomas.ad 	const char		*cause = NULL;
117 09876a9d 2024-04-25 thomas.ad 
118 09876a9d 2024-04-25 thomas.ad 	memset(&hints, 0, sizeof(hints));
119 09876a9d 2024-04-25 thomas.ad 	hints.ai_family = AF_UNSPEC;
120 09876a9d 2024-04-25 thomas.ad 	hints.ai_socktype = SOCK_STREAM;
121 09876a9d 2024-04-25 thomas.ad 	error = getaddrinfo(host, port, &hints, &res0);
122 09876a9d 2024-04-25 thomas.ad 	if (error) {
123 09876a9d 2024-04-25 thomas.ad 		warnx("%s", gai_strerror(error));
124 452122e2 2024-04-25 thomas.ad 		return -1;
125 09876a9d 2024-04-25 thomas.ad 	}
126 09876a9d 2024-04-25 thomas.ad 
127 09876a9d 2024-04-25 thomas.ad 	for (res = res0; res; res = res->ai_next) {
128 09876a9d 2024-04-25 thomas.ad 		fd = socket(res->ai_family, res->ai_socktype,
129 09876a9d 2024-04-25 thomas.ad 		    res->ai_protocol);
130 09876a9d 2024-04-25 thomas.ad 		if (fd == -1) {
131 09876a9d 2024-04-25 thomas.ad 			cause = "socket";
132 09876a9d 2024-04-25 thomas.ad 			continue;
133 09876a9d 2024-04-25 thomas.ad 		}
134 09876a9d 2024-04-25 thomas.ad 
135 09876a9d 2024-04-25 thomas.ad 		if (connect(fd, res->ai_addr, res->ai_addrlen) == 0)
136 09876a9d 2024-04-25 thomas.ad 			break;
137 09876a9d 2024-04-25 thomas.ad 
138 09876a9d 2024-04-25 thomas.ad 		cause = "connect";
139 09876a9d 2024-04-25 thomas.ad 		saved_errno = errno;
140 09876a9d 2024-04-25 thomas.ad 		close(fd);
141 09876a9d 2024-04-25 thomas.ad 		fd = -1;
142 09876a9d 2024-04-25 thomas.ad 		errno = saved_errno;
143 09876a9d 2024-04-25 thomas.ad 	}
144 09876a9d 2024-04-25 thomas.ad 	freeaddrinfo(res0);
145 09876a9d 2024-04-25 thomas.ad 
146 09876a9d 2024-04-25 thomas.ad 	if (fd == -1) {
147 09876a9d 2024-04-25 thomas.ad 		warn("%s", cause);
148 452122e2 2024-04-25 thomas.ad 		return -1;
149 09876a9d 2024-04-25 thomas.ad 	}
150 09876a9d 2024-04-25 thomas.ad 
151 452122e2 2024-04-25 thomas.ad 	return fd;
152 09876a9d 2024-04-25 thomas.ad }
153 09876a9d 2024-04-25 thomas.ad 
154 452122e2 2024-04-25 thomas.ad static int
155 452122e2 2024-04-25 thomas.ad http_open(struct bufio *bio, int https, const char *method, const char *host, const char *port,
156 452122e2 2024-04-25 thomas.ad     const char *path, const char *path_sufx, const char *query, const char *ctype)
157 09876a9d 2024-04-25 thomas.ad {
158 09876a9d 2024-04-25 thomas.ad 	const char	*chdr = NULL, *te = "";
159 09876a9d 2024-04-25 thomas.ad 	char		*p, *req;
160 09876a9d 2024-04-25 thomas.ad 	int		 r;
161 452122e2 2024-04-25 thomas.ad 	
162 09876a9d 2024-04-25 thomas.ad 	if (path_sufx != NULL && *path && path[strlen(path) - 1] == '/')
163 09876a9d 2024-04-25 thomas.ad 		path_sufx++; /* skip the slash */
164 09876a9d 2024-04-25 thomas.ad 
165 09876a9d 2024-04-25 thomas.ad 	if (strcmp(method, "POST") == 0)
166 09876a9d 2024-04-25 thomas.ad 		te = "\r\nTransfer-Encoding: chunked\r\n";
167 09876a9d 2024-04-25 thomas.ad 
168 09876a9d 2024-04-25 thomas.ad 	if (ctype)
169 09876a9d 2024-04-25 thomas.ad 		chdr = "Content-Type: ";
170 09876a9d 2024-04-25 thomas.ad 
171 09876a9d 2024-04-25 thomas.ad 	r = asprintf(&p, "%s/%s%s%s", path, path_sufx,
172 09876a9d 2024-04-25 thomas.ad 	    query ? "?" : "", query ? query : "");
173 09876a9d 2024-04-25 thomas.ad 	if (r == -1)
174 09876a9d 2024-04-25 thomas.ad 		err(1, "asprintf");
175 09876a9d 2024-04-25 thomas.ad 
176 09876a9d 2024-04-25 thomas.ad 	r = asprintf(&req, "%s %s HTTP/1.1\r\n"
177 09876a9d 2024-04-25 thomas.ad 	    "Host: %s\r\n"
178 09876a9d 2024-04-25 thomas.ad 	    "Connection: close\r\n"
179 09876a9d 2024-04-25 thomas.ad 	    "User-agent: %s\r\n"
180 09876a9d 2024-04-25 thomas.ad 	    "%s%s%s\r\n",
181 09876a9d 2024-04-25 thomas.ad 	    method, p, host, GOT_USERAGENT,
182 09876a9d 2024-04-25 thomas.ad 	    chdr ? chdr : "", ctype ? ctype : "", te);
183 09876a9d 2024-04-25 thomas.ad 	if (r == -1)
184 09876a9d 2024-04-25 thomas.ad 		err(1, "asprintf");
185 452122e2 2024-04-25 thomas.ad 	free(p);
186 09876a9d 2024-04-25 thomas.ad 
187 09876a9d 2024-04-25 thomas.ad 	if (verbose > 0)
188 b39e70da 2024-04-25 thomas.ad 		fprintf(stderr, "%s: request: %s\n", getprogname(), req);
189 452122e2 2024-04-25 thomas.ad 	
190 09876a9d 2024-04-25 thomas.ad 
191 452122e2 2024-04-25 thomas.ad 	r = bufio_compose(bio, req, r);
192 452122e2 2024-04-25 thomas.ad 	if (r == -1)
193 452122e2 2024-04-25 thomas.ad 		err(1, "bufio_compose_fmt");
194 09876a9d 2024-04-25 thomas.ad 	free(req);
195 09876a9d 2024-04-25 thomas.ad 
196 452122e2 2024-04-25 thomas.ad 	do {
197 452122e2 2024-04-25 thomas.ad 		r = bufio_write(bio);
198 452122e2 2024-04-25 thomas.ad 		if (r == -1 && errno != EAGAIN)
199 452122e2 2024-04-25 thomas.ad 			errx(1, "bufio_read: %s", bufio_io_err(bio));
200 452122e2 2024-04-25 thomas.ad 	} while (bio->wbuf.len != 0);
201 452122e2 2024-04-25 thomas.ad 
202 452122e2 2024-04-25 thomas.ad 	return 0;
203 09876a9d 2024-04-25 thomas.ad }
204 09876a9d 2024-04-25 thomas.ad 
205 09876a9d 2024-04-25 thomas.ad static int
206 452122e2 2024-04-25 thomas.ad http_parse_reply(struct bufio *bio, int *chunked, const char *expected_ctype)
207 09876a9d 2024-04-25 thomas.ad {
208 452122e2 2024-04-25 thomas.ad 	char		*cp, *line;
209 452122e2 2024-04-25 thomas.ad 	size_t		 linelen;
210 09876a9d 2024-04-25 thomas.ad 
211 09876a9d 2024-04-25 thomas.ad 	*chunked = 0;
212 09876a9d 2024-04-25 thomas.ad 
213 452122e2 2024-04-25 thomas.ad 	line = bufio_getdelim_sync(bio, "\r\n", &linelen);
214 452122e2 2024-04-25 thomas.ad 	if (line == NULL) {
215 452122e2 2024-04-25 thomas.ad 		warnx("%s: bufio_getdelim_sync()", __func__);
216 09876a9d 2024-04-25 thomas.ad 		return -1;
217 09876a9d 2024-04-25 thomas.ad 	}
218 09876a9d 2024-04-25 thomas.ad 
219 29460ff0 2024-04-25 thomas.ad 	if (verbose > 0)
220 b39e70da 2024-04-25 thomas.ad 		fprintf(stderr, "%s: response: %s\n", getprogname(), line);
221 29460ff0 2024-04-25 thomas.ad 
222 09876a9d 2024-04-25 thomas.ad 	if ((cp = strchr(line, ' ')) == NULL) {
223 09876a9d 2024-04-25 thomas.ad 		warnx("malformed HTTP response");
224 452122e2 2024-04-25 thomas.ad 		return -1;
225 09876a9d 2024-04-25 thomas.ad 	}
226 09876a9d 2024-04-25 thomas.ad 	cp++;
227 09876a9d 2024-04-25 thomas.ad 
228 09876a9d 2024-04-25 thomas.ad 	if (strncmp(cp, "200 ", 4) != 0) {
229 09876a9d 2024-04-25 thomas.ad 		warnx("malformed HTTP response");
230 452122e2 2024-04-25 thomas.ad 		return -1;
231 09876a9d 2024-04-25 thomas.ad 	}
232 452122e2 2024-04-25 thomas.ad 	buf_drain(&bio->rbuf, linelen);
233 09876a9d 2024-04-25 thomas.ad 
234 452122e2 2024-04-25 thomas.ad 	while(1) {
235 452122e2 2024-04-25 thomas.ad 		line = bufio_getdelim_sync(bio, "\r\n", &linelen);
236 452122e2 2024-04-25 thomas.ad 		if (line == NULL) {
237 452122e2 2024-04-25 thomas.ad 			warnx("%s: bufio_getdelim_sync()", __func__);
238 452122e2 2024-04-25 thomas.ad 			return -1;
239 452122e2 2024-04-25 thomas.ad 		}
240 452122e2 2024-04-25 thomas.ad 		if (*line == '\0') {
241 452122e2 2024-04-25 thomas.ad 			buf_drain(&bio->rbuf, linelen);
242 09876a9d 2024-04-25 thomas.ad 			break;
243 452122e2 2024-04-25 thomas.ad 		}
244 09876a9d 2024-04-25 thomas.ad 
245 09876a9d 2024-04-25 thomas.ad 		if (hasprfx(line, "content-type:")) {
246 09876a9d 2024-04-25 thomas.ad 			cp = strchr(line, ':') + 1;
247 09876a9d 2024-04-25 thomas.ad 			cp += strspn(cp, " \t");
248 09876a9d 2024-04-25 thomas.ad 			cp[strcspn(cp, " \t")] = '\0';
249 09876a9d 2024-04-25 thomas.ad 			if (strcmp(cp, expected_ctype) != 0) {
250 09876a9d 2024-04-25 thomas.ad 				warnx("server not using the \"smart\" "
251 09876a9d 2024-04-25 thomas.ad 				    "HTTP protocol.");
252 452122e2 2024-04-25 thomas.ad 				return -1;
253 09876a9d 2024-04-25 thomas.ad 			}
254 09876a9d 2024-04-25 thomas.ad 		}
255 09876a9d 2024-04-25 thomas.ad 		if (hasprfx(line, "transfer-encoding:")) {
256 09876a9d 2024-04-25 thomas.ad 			cp = strchr(line, ':') + 1;
257 09876a9d 2024-04-25 thomas.ad 			cp += strspn(cp, " \t");
258 09876a9d 2024-04-25 thomas.ad 			cp[strcspn(cp, " \t")] = '\0';
259 09876a9d 2024-04-25 thomas.ad 			if (strcmp(cp, "chunked") != 0) {
260 09876a9d 2024-04-25 thomas.ad 				warnx("unknown transfer-encoding");
261 452122e2 2024-04-25 thomas.ad 				return -1;
262 09876a9d 2024-04-25 thomas.ad 			}
263 09876a9d 2024-04-25 thomas.ad 			*chunked = 1;
264 09876a9d 2024-04-25 thomas.ad 		}
265 452122e2 2024-04-25 thomas.ad 		buf_drain(&bio->rbuf, linelen);
266 09876a9d 2024-04-25 thomas.ad 	}
267 09876a9d 2024-04-25 thomas.ad 
268 09876a9d 2024-04-25 thomas.ad 	return 0;
269 09876a9d 2024-04-25 thomas.ad }
270 09876a9d 2024-04-25 thomas.ad 
271 09876a9d 2024-04-25 thomas.ad static ssize_t
272 452122e2 2024-04-25 thomas.ad http_read(struct bufio *bio, int chunked, size_t *chunksz, char *buf, size_t bufsz)
273 09876a9d 2024-04-25 thomas.ad {
274 09876a9d 2024-04-25 thomas.ad 	const char	*errstr;
275 452122e2 2024-04-25 thomas.ad 	char		*line = NULL;
276 452122e2 2024-04-25 thomas.ad 	size_t		 r;
277 09876a9d 2024-04-25 thomas.ad 	ssize_t		 ret = 0, linelen;
278 09876a9d 2024-04-25 thomas.ad 
279 09876a9d 2024-04-25 thomas.ad 	if (!chunked) {
280 452122e2 2024-04-25 thomas.ad 		r = bufio_drain_sync(bio, buf, bufsz);
281 452122e2 2024-04-25 thomas.ad 		if (r == 0)
282 09876a9d 2024-04-25 thomas.ad 			return -1;
283 09876a9d 2024-04-25 thomas.ad 		return r;
284 09876a9d 2024-04-25 thomas.ad 	}
285 09876a9d 2024-04-25 thomas.ad 
286 09876a9d 2024-04-25 thomas.ad 	while (bufsz > 0) {
287 09876a9d 2024-04-25 thomas.ad 		if (*chunksz == 0) {
288 09876a9d 2024-04-25 thomas.ad 		again:
289 452122e2 2024-04-25 thomas.ad 			line = bufio_getdelim_sync(bio, "\r\n", &linelen);
290 452122e2 2024-04-25 thomas.ad 			if (line == NULL) {
291 452122e2 2024-04-25 thomas.ad 				buf_drain(&bio->rbuf, linelen);
292 09876a9d 2024-04-25 thomas.ad 				break;
293 09876a9d 2024-04-25 thomas.ad 			}
294 452122e2 2024-04-25 thomas.ad 			if (*line == '\0') {
295 452122e2 2024-04-25 thomas.ad 				buf_drain(&bio->rbuf, linelen);
296 452122e2 2024-04-25 thomas.ad 				goto again; /* was the CRLF after the chunk */
297 09876a9d 2024-04-25 thomas.ad 			}
298 09876a9d 2024-04-25 thomas.ad 
299 09876a9d 2024-04-25 thomas.ad 			*chunksz = hexstrtonum(line, 0, INT_MAX, &errstr);
300 09876a9d 2024-04-25 thomas.ad 			if (errstr != NULL) {
301 09876a9d 2024-04-25 thomas.ad 				warnx("invalid HTTP chunk: size is %s (%s)",
302 09876a9d 2024-04-25 thomas.ad 				    errstr, line);
303 09876a9d 2024-04-25 thomas.ad 				ret = -1;
304 09876a9d 2024-04-25 thomas.ad 				break;
305 09876a9d 2024-04-25 thomas.ad 			}
306 09876a9d 2024-04-25 thomas.ad 
307 452122e2 2024-04-25 thomas.ad 			if (*chunksz == 0) {
308 452122e2 2024-04-25 thomas.ad 				buf_drain(&bio->rbuf, linelen);
309 09876a9d 2024-04-25 thomas.ad 				break;
310 452122e2 2024-04-25 thomas.ad 			}
311 452122e2 2024-04-25 thomas.ad 			buf_drain(&bio->rbuf, linelen);
312 09876a9d 2024-04-25 thomas.ad 		}
313 09876a9d 2024-04-25 thomas.ad 
314 452122e2 2024-04-25 thomas.ad 		r = bufio_drain_sync(bio, buf, MINIMUM(*chunksz, bufsz));
315 09876a9d 2024-04-25 thomas.ad 		if (r == 0) {
316 09876a9d 2024-04-25 thomas.ad 			break;
317 09876a9d 2024-04-25 thomas.ad 		}
318 09876a9d 2024-04-25 thomas.ad 
319 09876a9d 2024-04-25 thomas.ad 		ret += r;
320 09876a9d 2024-04-25 thomas.ad 		buf += r;
321 09876a9d 2024-04-25 thomas.ad 		bufsz -= r;
322 09876a9d 2024-04-25 thomas.ad 		*chunksz -= r;
323 09876a9d 2024-04-25 thomas.ad 	}
324 09876a9d 2024-04-25 thomas.ad 
325 09876a9d 2024-04-25 thomas.ad 	return ret;
326 09876a9d 2024-04-25 thomas.ad }
327 09876a9d 2024-04-25 thomas.ad 
328 452122e2 2024-04-25 thomas.ad static int
329 452122e2 2024-04-25 thomas.ad http_chunk(struct bufio *bio, const void *buf, size_t len)
330 09876a9d 2024-04-25 thomas.ad {
331 452122e2 2024-04-25 thomas.ad 	int r;
332 09876a9d 2024-04-25 thomas.ad 
333 452122e2 2024-04-25 thomas.ad 	if (bufio_compose_fmt(bio, "%zx\r\n", len) ||
334 452122e2 2024-04-25 thomas.ad 	    bufio_compose(bio, buf, len) ||
335 452122e2 2024-04-25 thomas.ad 	    bufio_compose(bio, "\r\n", 2))
336 452122e2 2024-04-25 thomas.ad 		return 1;
337 452122e2 2024-04-25 thomas.ad 
338 452122e2 2024-04-25 thomas.ad 	do {
339 452122e2 2024-04-25 thomas.ad 		r = bufio_write(bio);
340 452122e2 2024-04-25 thomas.ad 		if (r == -1 && errno != EAGAIN)
341 452122e2 2024-04-25 thomas.ad 			errx(1, "bufio_read: %s", bufio_io_err(bio));
342 452122e2 2024-04-25 thomas.ad 	} while (bio->wbuf.len != 0);
343 452122e2 2024-04-25 thomas.ad 
344 452122e2 2024-04-25 thomas.ad 	return 0;
345 09876a9d 2024-04-25 thomas.ad }
346 09876a9d 2024-04-25 thomas.ad 
347 09876a9d 2024-04-25 thomas.ad static int
348 09876a9d 2024-04-25 thomas.ad get_refs(int https, const char *host, const char *port, const char *path)
349 09876a9d 2024-04-25 thomas.ad {
350 507e5154 2024-04-25 thomas.ad 	struct bufio		 bio;
351 507e5154 2024-04-25 thomas.ad 	char			 buf[GOT_PKT_MAX];
352 507e5154 2024-04-25 thomas.ad 	const struct got_error	*e;
353 507e5154 2024-04-25 thomas.ad 	const char		*sufx = "/info/refs";
354 507e5154 2024-04-25 thomas.ad 	size_t			 chunksz = 0;
355 507e5154 2024-04-25 thomas.ad 	ssize_t			 r;
356 507e5154 2024-04-25 thomas.ad 	int			 skip;
357 507e5154 2024-04-25 thomas.ad 	int			 chunked;
358 507e5154 2024-04-25 thomas.ad 	int			 sock;
359 507e5154 2024-04-25 thomas.ad 	int			 ret = -1;
360 09876a9d 2024-04-25 thomas.ad 
361 452122e2 2024-04-25 thomas.ad 	if ((sock = dial(https, host, port)) == -1)
362 09876a9d 2024-04-25 thomas.ad 		return -1;
363 09876a9d 2024-04-25 thomas.ad 
364 452122e2 2024-04-25 thomas.ad 	if (bufio_init(&bio)) {
365 452122e2 2024-04-25 thomas.ad 		warnx("bufio_init");
366 452122e2 2024-04-25 thomas.ad 		goto err;
367 452122e2 2024-04-25 thomas.ad 	}
368 452122e2 2024-04-25 thomas.ad 	bufio_set_fd(&bio, sock);
369 452122e2 2024-04-25 thomas.ad 	if (https && bufio_starttls(&bio, host, 0, NULL, 0, NULL, 0) == -1) {
370 452122e2 2024-04-25 thomas.ad 		warnx("bufio_starttls");
371 452122e2 2024-04-25 thomas.ad 		goto err;
372 09876a9d 2024-04-25 thomas.ad 	}
373 09876a9d 2024-04-25 thomas.ad 
374 452122e2 2024-04-25 thomas.ad 	if (http_open(&bio, https, "GET", host, port, path, sufx,
375 452122e2 2024-04-25 thomas.ad 	    "service=git-upload-pack", NULL) == -1)
376 452122e2 2024-04-25 thomas.ad 		goto err;
377 452122e2 2024-04-25 thomas.ad 
378 ff4d9c2e 2024-04-25 thomas.ad 	/* Fetch the initial reference announcement from the server. */
379 452122e2 2024-04-25 thomas.ad 	if (http_parse_reply(&bio, &chunked, UPLOAD_PACK_ADV) == -1)
380 452122e2 2024-04-25 thomas.ad 		goto err;
381 452122e2 2024-04-25 thomas.ad 
382 09876a9d 2024-04-25 thomas.ad 	/* skip first pack; why git over http is like this? */
383 452122e2 2024-04-25 thomas.ad 	r = http_read(&bio, chunked, &chunksz, buf, 4);
384 452122e2 2024-04-25 thomas.ad 	if (r <= 0)
385 452122e2 2024-04-25 thomas.ad 		goto err;
386 507e5154 2024-04-25 thomas.ad 
387 507e5154 2024-04-25 thomas.ad 	e = got_pkt_readlen(&skip, buf, verbose);
388 507e5154 2024-04-25 thomas.ad 	if (e) {
389 507e5154 2024-04-25 thomas.ad 		warnx("%s", e->msg);
390 452122e2 2024-04-25 thomas.ad 		goto err;
391 09876a9d 2024-04-25 thomas.ad 	}
392 09876a9d 2024-04-25 thomas.ad 
393 09876a9d 2024-04-25 thomas.ad 	/* TODO: validate it's # service=git-upload-pack\n */
394 09876a9d 2024-04-25 thomas.ad 	while (skip > 0) {
395 452122e2 2024-04-25 thomas.ad 		r = http_read(&bio, chunked, &chunksz, buf,
396 09876a9d 2024-04-25 thomas.ad 		    MINIMUM(skip, sizeof(buf)));
397 452122e2 2024-04-25 thomas.ad 		if (r <= 0)
398 452122e2 2024-04-25 thomas.ad 			goto err;
399 09876a9d 2024-04-25 thomas.ad 		skip -= r;
400 09876a9d 2024-04-25 thomas.ad 	}
401 09876a9d 2024-04-25 thomas.ad 
402 09876a9d 2024-04-25 thomas.ad 	for (;;) {
403 452122e2 2024-04-25 thomas.ad 		r = http_read(&bio, chunked, &chunksz, buf, sizeof(buf));
404 452122e2 2024-04-25 thomas.ad 		if (r == -1)
405 452122e2 2024-04-25 thomas.ad 			goto err;
406 09876a9d 2024-04-25 thomas.ad 
407 09876a9d 2024-04-25 thomas.ad 		if (r == 0)
408 09876a9d 2024-04-25 thomas.ad 			break;
409 09876a9d 2024-04-25 thomas.ad 
410 09876a9d 2024-04-25 thomas.ad 		fwrite(buf, 1, r, stdout);
411 09876a9d 2024-04-25 thomas.ad 	}
412 09876a9d 2024-04-25 thomas.ad 
413 09876a9d 2024-04-25 thomas.ad 	fflush(stdout);
414 452122e2 2024-04-25 thomas.ad 	ret = 0;
415 452122e2 2024-04-25 thomas.ad err:
416 452122e2 2024-04-25 thomas.ad 	bufio_close_sync(&bio);
417 452122e2 2024-04-25 thomas.ad 	bufio_free(&bio);
418 452122e2 2024-04-25 thomas.ad 	return ret;
419 09876a9d 2024-04-25 thomas.ad }
420 09876a9d 2024-04-25 thomas.ad 
421 09876a9d 2024-04-25 thomas.ad static int
422 09876a9d 2024-04-25 thomas.ad upload_request(int https, const char *host, const char *port, const char *path,
423 09876a9d 2024-04-25 thomas.ad     FILE *in)
424 09876a9d 2024-04-25 thomas.ad {
425 507e5154 2024-04-25 thomas.ad 	struct bufio		 bio;
426 507e5154 2024-04-25 thomas.ad 	char			 buf[GOT_PKT_MAX];
427 507e5154 2024-04-25 thomas.ad 	const struct got_error	*e;
428 507e5154 2024-04-25 thomas.ad 	ssize_t			 r;
429 507e5154 2024-04-25 thomas.ad 	size_t			 chunksz = 0;
430 507e5154 2024-04-25 thomas.ad 	int			 t;
431 507e5154 2024-04-25 thomas.ad 	int			 chunked;
432 507e5154 2024-04-25 thomas.ad 	int			 sock;
433 507e5154 2024-04-25 thomas.ad 	int			 ret = -1;
434 09876a9d 2024-04-25 thomas.ad 
435 452122e2 2024-04-25 thomas.ad 	if ((sock = dial(https, host, port)) == -1)
436 09876a9d 2024-04-25 thomas.ad 		return -1;
437 ed77be68 2024-04-25 thomas.ad 
438 452122e2 2024-04-25 thomas.ad 	if (bufio_init(&bio)) {
439 452122e2 2024-04-25 thomas.ad 		warnx("bufio_init");
440 452122e2 2024-04-25 thomas.ad 		goto err;
441 452122e2 2024-04-25 thomas.ad 	}
442 452122e2 2024-04-25 thomas.ad 	bufio_set_fd(&bio, sock);
443 452122e2 2024-04-25 thomas.ad 	if (https && bufio_starttls(&bio, host, 0, NULL, 0, NULL, 0) == -1) {
444 452122e2 2024-04-25 thomas.ad 		warnx("bufio_starttls");
445 452122e2 2024-04-25 thomas.ad 		goto err;
446 452122e2 2024-04-25 thomas.ad 	}
447 ed77be68 2024-04-25 thomas.ad #ifndef PROFILE
448 ed77be68 2024-04-25 thomas.ad 	/* TODO: can we push this upwards such that get_refs() is covered? */
449 ed77be68 2024-04-25 thomas.ad 	if (pledge("stdio", NULL) == -1)
450 ed77be68 2024-04-25 thomas.ad 		err(1, "pledge");
451 ed77be68 2024-04-25 thomas.ad #endif
452 452122e2 2024-04-25 thomas.ad 	if (http_open(&bio, https, "POST", host, port, path, "/git-upload-pack",
453 452122e2 2024-04-25 thomas.ad 	    NULL, UPLOAD_PACK_REQ) == -1)
454 452122e2 2024-04-25 thomas.ad 		goto err;
455 452122e2 2024-04-25 thomas.ad 
456 ff4d9c2e 2024-04-25 thomas.ad 	/*
457 ff4d9c2e 2024-04-25 thomas.ad 	 * Read have/want lines generated by got-fetch-pack and forward
458 ff4d9c2e 2024-04-25 thomas.ad 	 * them to the server in the POST request body.
459 ff4d9c2e 2024-04-25 thomas.ad 	 */
460 09876a9d 2024-04-25 thomas.ad 	for (;;) {
461 09876a9d 2024-04-25 thomas.ad 		r = fread(buf, 1, 4, in);
462 09876a9d 2024-04-25 thomas.ad 		if (r != 4)
463 09876a9d 2024-04-25 thomas.ad 			goto err;
464 09876a9d 2024-04-25 thomas.ad 
465 507e5154 2024-04-25 thomas.ad 		e = got_pkt_readlen(&t, buf, verbose);
466 507e5154 2024-04-25 thomas.ad 		if (e) {
467 507e5154 2024-04-25 thomas.ad 			warnx("%s", e->msg);
468 09876a9d 2024-04-25 thomas.ad 			goto err;
469 09876a9d 2024-04-25 thomas.ad 		}
470 09876a9d 2024-04-25 thomas.ad 
471 09876a9d 2024-04-25 thomas.ad 		if (t == 0) {
472 06dc3607 2024-04-25 thomas.ad 			const char *flushpkt = "0000";
473 06dc3607 2024-04-25 thomas.ad 			if (http_chunk(&bio, flushpkt, strlen(flushpkt)))
474 452122e2 2024-04-25 thomas.ad 				goto err;
475 06dc3607 2024-04-25 thomas.ad 			continue; /* got-fetch-pack will send "done" */
476 09876a9d 2024-04-25 thomas.ad 		}
477 09876a9d 2024-04-25 thomas.ad 
478 09876a9d 2024-04-25 thomas.ad 		if (t < 6) {
479 09876a9d 2024-04-25 thomas.ad 			warnx("pktline len is too small");
480 09876a9d 2024-04-25 thomas.ad 			goto err;
481 09876a9d 2024-04-25 thomas.ad 		}
482 09876a9d 2024-04-25 thomas.ad 
483 09876a9d 2024-04-25 thomas.ad 		r = fread(buf + 4, 1, t - 4, in);
484 09876a9d 2024-04-25 thomas.ad 		if (r != t - 4)
485 09876a9d 2024-04-25 thomas.ad 			goto err;
486 09876a9d 2024-04-25 thomas.ad 
487 452122e2 2024-04-25 thomas.ad 		if (http_chunk(&bio, buf, t))
488 452122e2 2024-04-25 thomas.ad 			goto err;
489 06dc3607 2024-04-25 thomas.ad 
490 06dc3607 2024-04-25 thomas.ad 		/*
491 06dc3607 2024-04-25 thomas.ad 		 * Once got-fetch-pack is done the server will
492 06dc3607 2024-04-25 thomas.ad 		 * send pack file data.
493 06dc3607 2024-04-25 thomas.ad 		 */
494 06dc3607 2024-04-25 thomas.ad 		if (t == 9 && strncmp(buf + 4, "done\n", 5) == 0) {
495 06dc3607 2024-04-25 thomas.ad 			if (http_chunk(&bio, NULL, 0))
496 06dc3607 2024-04-25 thomas.ad 				goto err;
497 06dc3607 2024-04-25 thomas.ad 			break;
498 06dc3607 2024-04-25 thomas.ad 		}
499 09876a9d 2024-04-25 thomas.ad 	}
500 09876a9d 2024-04-25 thomas.ad 
501 452122e2 2024-04-25 thomas.ad 	if (http_parse_reply(&bio, &chunked, UPLOAD_PACK_RES) == -1)
502 09876a9d 2024-04-25 thomas.ad 		goto err;
503 09876a9d 2024-04-25 thomas.ad 
504 ff4d9c2e 2024-04-25 thomas.ad 	/* Fetch pack file data from server. */
505 09876a9d 2024-04-25 thomas.ad 	for (;;) {
506 452122e2 2024-04-25 thomas.ad 		r = http_read(&bio, chunked, &chunksz, buf, sizeof(buf));
507 452122e2 2024-04-25 thomas.ad 		if (r == -1)
508 452122e2 2024-04-25 thomas.ad 			goto err;
509 09876a9d 2024-04-25 thomas.ad 
510 09876a9d 2024-04-25 thomas.ad 		if (r == 0)
511 09876a9d 2024-04-25 thomas.ad 			break;
512 09876a9d 2024-04-25 thomas.ad 
513 09876a9d 2024-04-25 thomas.ad 		fwrite(buf, 1, r, stdout);
514 09876a9d 2024-04-25 thomas.ad 	}
515 09876a9d 2024-04-25 thomas.ad 
516 452122e2 2024-04-25 thomas.ad 	ret = 0;
517 09876a9d 2024-04-25 thomas.ad err:
518 452122e2 2024-04-25 thomas.ad 	bufio_close_sync(&bio);
519 452122e2 2024-04-25 thomas.ad 	bufio_free(&bio);
520 452122e2 2024-04-25 thomas.ad 	return ret;
521 09876a9d 2024-04-25 thomas.ad }
522 09876a9d 2024-04-25 thomas.ad 
523 09876a9d 2024-04-25 thomas.ad static __dead void
524 09876a9d 2024-04-25 thomas.ad usage(void)
525 09876a9d 2024-04-25 thomas.ad {
526 09876a9d 2024-04-25 thomas.ad 	fprintf(stderr, "usage: %s [-qv] proto host port path\n",
527 09876a9d 2024-04-25 thomas.ad 	     getprogname());
528 09876a9d 2024-04-25 thomas.ad 	exit(1);
529 09876a9d 2024-04-25 thomas.ad }
530 09876a9d 2024-04-25 thomas.ad 
531 09876a9d 2024-04-25 thomas.ad int
532 09876a9d 2024-04-25 thomas.ad main(int argc, char **argv)
533 09876a9d 2024-04-25 thomas.ad {
534 09876a9d 2024-04-25 thomas.ad 	struct pollfd	 pfd;
535 09876a9d 2024-04-25 thomas.ad 	const char	*host, *port, *path;
536 09876a9d 2024-04-25 thomas.ad 	int		 https = 0;
537 09876a9d 2024-04-25 thomas.ad 	int		 ch;
538 09876a9d 2024-04-25 thomas.ad 
539 cf87b1d1 2024-04-25 thomas.ad #ifndef PROFILE
540 a9a48d93 2024-04-25 thomas.ad 	if (pledge("stdio rpath inet dns unveil", NULL) == -1)
541 09876a9d 2024-04-25 thomas.ad 		err(1, "pledge");
542 09876a9d 2024-04-25 thomas.ad #endif
543 09876a9d 2024-04-25 thomas.ad 
544 09876a9d 2024-04-25 thomas.ad 	while ((ch = getopt(argc, argv, "qv")) != -1) {
545 09876a9d 2024-04-25 thomas.ad 		switch (ch) {
546 09876a9d 2024-04-25 thomas.ad 		case 'q':
547 09876a9d 2024-04-25 thomas.ad 			verbose = -1;
548 09876a9d 2024-04-25 thomas.ad 			break;
549 09876a9d 2024-04-25 thomas.ad 		case 'v':
550 09876a9d 2024-04-25 thomas.ad 			verbose++;
551 09876a9d 2024-04-25 thomas.ad 			break;
552 09876a9d 2024-04-25 thomas.ad 		default:
553 09876a9d 2024-04-25 thomas.ad 			usage();
554 09876a9d 2024-04-25 thomas.ad 		}
555 09876a9d 2024-04-25 thomas.ad 	}
556 09876a9d 2024-04-25 thomas.ad 	argc -= optind;
557 09876a9d 2024-04-25 thomas.ad 	argv += optind;
558 09876a9d 2024-04-25 thomas.ad 
559 09876a9d 2024-04-25 thomas.ad 	if (argc != 4)
560 09876a9d 2024-04-25 thomas.ad 		usage();
561 09876a9d 2024-04-25 thomas.ad 
562 09876a9d 2024-04-25 thomas.ad 	https = strcmp(argv[0], "https") == 0;
563 e9495ffd 2024-04-25 thomas.ad #ifndef PROFILE
564 a9a48d93 2024-04-25 thomas.ad 	if (https) {
565 a9a48d93 2024-04-25 thomas.ad 		if (unveil("/etc/ssl/cert.pem", "r") == -1)
566 a9a48d93 2024-04-25 thomas.ad 			err(1, "unveil /etc/ssl/cert.pem");
567 a9a48d93 2024-04-25 thomas.ad 	} else {
568 e9495ffd 2024-04-25 thomas.ad 		/* drop "rpath" */
569 a9a48d93 2024-04-25 thomas.ad 		if (pledge("stdio inet dns unveil", NULL) == -1)
570 e9495ffd 2024-04-25 thomas.ad 			err(1, "pledge");
571 e9495ffd 2024-04-25 thomas.ad 	}
572 a9a48d93 2024-04-25 thomas.ad #else
573 a9a48d93 2024-04-25 thomas.ad 	if (unveil("gmon.out", "rwc") != 0)
574 a9a48d93 2024-04-25 thomas.ad 		err(1, "unveil gmon.out");
575 e9495ffd 2024-04-25 thomas.ad #endif
576 a9a48d93 2024-04-25 thomas.ad 	if (unveil(NULL, NULL) == -1)
577 a9a48d93 2024-04-25 thomas.ad 		err(1, "unveil NULL");
578 a9a48d93 2024-04-25 thomas.ad 
579 09876a9d 2024-04-25 thomas.ad 	host = argv[1];
580 09876a9d 2024-04-25 thomas.ad 	port = argv[2];
581 09876a9d 2024-04-25 thomas.ad 	path = argv[3];
582 09876a9d 2024-04-25 thomas.ad 
583 09876a9d 2024-04-25 thomas.ad 	if (get_refs(https, host, port, path) == -1)
584 09876a9d 2024-04-25 thomas.ad 		errx(1, "failed to get refs");
585 09876a9d 2024-04-25 thomas.ad 
586 09876a9d 2024-04-25 thomas.ad 	pfd.fd = 0;
587 09876a9d 2024-04-25 thomas.ad 	pfd.events = POLLIN;
588 09876a9d 2024-04-25 thomas.ad 	if (poll(&pfd, 1, INFTIM) == -1)
589 09876a9d 2024-04-25 thomas.ad 		err(1, "poll");
590 09876a9d 2024-04-25 thomas.ad 
591 09876a9d 2024-04-25 thomas.ad 	if ((ch = fgetc(stdin)) == EOF)
592 09876a9d 2024-04-25 thomas.ad 		return 0;
593 09876a9d 2024-04-25 thomas.ad 
594 09876a9d 2024-04-25 thomas.ad 	ungetc(ch, stdin);
595 09876a9d 2024-04-25 thomas.ad 	if (upload_request(https, host, port, path, stdin) == -1) {
596 09876a9d 2024-04-25 thomas.ad 		fflush(tmp);
597 09876a9d 2024-04-25 thomas.ad 		errx(1, "failed to upload request");
598 09876a9d 2024-04-25 thomas.ad 	}
599 09876a9d 2024-04-25 thomas.ad 
600 09876a9d 2024-04-25 thomas.ad 	return 0;
601 09876a9d 2024-04-25 thomas.ad }