1 93658fb9 2020-03-18 stsp /*
  2 93658fb9 2020-03-18 stsp  * Copyright (c) 2019 Ori Bernstein <ori@openbsd.org>
  3 93658fb9 2020-03-18 stsp  *
  4 93658fb9 2020-03-18 stsp  * Permission to use, copy, modify, and distribute this software for any
  5 93658fb9 2020-03-18 stsp  * purpose with or without fee is hereby granted, provided that the above
  6 93658fb9 2020-03-18 stsp  * copyright notice and this permission notice appear in all copies.
  7 93658fb9 2020-03-18 stsp  *
  8 93658fb9 2020-03-18 stsp  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
  9 93658fb9 2020-03-18 stsp  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 10 93658fb9 2020-03-18 stsp  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 11 93658fb9 2020-03-18 stsp  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 12 93658fb9 2020-03-18 stsp  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 13 93658fb9 2020-03-18 stsp  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 14 93658fb9 2020-03-18 stsp  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 15 93658fb9 2020-03-18 stsp  */
 16 93658fb9 2020-03-18 stsp 
 17 93658fb9 2020-03-18 stsp #include <sys/types.h>
 18 93658fb9 2020-03-18 stsp #include <sys/queue.h>
 19 93658fb9 2020-03-18 stsp #include <sys/uio.h>
 20 93658fb9 2020-03-18 stsp #include <sys/time.h>
 21 93658fb9 2020-03-18 stsp #include <sys/stat.h>
 22 93658fb9 2020-03-18 stsp #include <sys/syslimits.h>
 23 93658fb9 2020-03-18 stsp 
 24 93658fb9 2020-03-18 stsp #include <stdint.h>
 25 93658fb9 2020-03-18 stsp #include <errno.h>
 26 93658fb9 2020-03-18 stsp #include <imsg.h>
 27 93658fb9 2020-03-18 stsp #include <limits.h>
 28 93658fb9 2020-03-18 stsp #include <signal.h>
 29 93658fb9 2020-03-18 stsp #include <stdio.h>
 30 93658fb9 2020-03-18 stsp #include <stdlib.h>
 31 93658fb9 2020-03-18 stsp #include <string.h>
 32 93658fb9 2020-03-18 stsp #include <ctype.h>
 33 93658fb9 2020-03-18 stsp #include <sha1.h>
 34 93658fb9 2020-03-18 stsp #include <fcntl.h>
 35 93658fb9 2020-03-18 stsp #include <zlib.h>
 36 93658fb9 2020-03-18 stsp #include <err.h>
 37 93658fb9 2020-03-18 stsp 
 38 93658fb9 2020-03-18 stsp #include "got_error.h"
 39 93658fb9 2020-03-18 stsp #include "got_object.h"
 40 8a29a085 2020-03-18 stsp #include "got_version.h"
 41 93658fb9 2020-03-18 stsp 
 42 93658fb9 2020-03-18 stsp #include "got_lib_sha1.h"
 43 93658fb9 2020-03-18 stsp #include "got_lib_delta.h"
 44 93658fb9 2020-03-18 stsp #include "got_lib_inflate.h"
 45 93658fb9 2020-03-18 stsp #include "got_lib_object.h"
 46 93658fb9 2020-03-18 stsp #include "got_lib_object_parse.h"
 47 93658fb9 2020-03-18 stsp #include "got_lib_privsep.h"
 48 93658fb9 2020-03-18 stsp 
 49 8a29a085 2020-03-18 stsp #ifndef nitems
 50 8a29a085 2020-03-18 stsp #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
 51 8a29a085 2020-03-18 stsp #endif
 52 8a29a085 2020-03-18 stsp 
 53 93658fb9 2020-03-18 stsp #define GOT_PKTMAX	65536
 54 93658fb9 2020-03-18 stsp 
 55 93658fb9 2020-03-18 stsp struct got_object *indexed;
 56 93658fb9 2020-03-18 stsp static int chattygit;
 57 93658fb9 2020-03-18 stsp static char *fetchbranch;
 58 93658fb9 2020-03-18 stsp static char *upstream = "origin";
 59 93658fb9 2020-03-18 stsp static struct got_object_id zhash = {.sha1={0}};
 60 93658fb9 2020-03-18 stsp 
 61 93658fb9 2020-03-18 stsp static char*
 62 93658fb9 2020-03-18 stsp strip(char *ref)
 63 93658fb9 2020-03-18 stsp {
 64 93658fb9 2020-03-18 stsp 	return ref;
 65 93658fb9 2020-03-18 stsp }
 66 93658fb9 2020-03-18 stsp 
 67 93658fb9 2020-03-18 stsp int
 68 93658fb9 2020-03-18 stsp readn(int fd, void *buf, size_t n)
 69 93658fb9 2020-03-18 stsp {
 70 93658fb9 2020-03-18 stsp 	ssize_t r, off;
 71 93658fb9 2020-03-18 stsp 
 72 93658fb9 2020-03-18 stsp 	off = 0;
 73 93658fb9 2020-03-18 stsp 	while (off != n) {
 74 93658fb9 2020-03-18 stsp 		r = read(fd, buf + off, n - off);
 75 93658fb9 2020-03-18 stsp 		if (r < 0)
 76 93658fb9 2020-03-18 stsp 			return -1;
 77 93658fb9 2020-03-18 stsp 		if (r == 0)
 78 93658fb9 2020-03-18 stsp 			return off;
 79 93658fb9 2020-03-18 stsp 		off += r;
 80 93658fb9 2020-03-18 stsp 	}
 81 93658fb9 2020-03-18 stsp 	return off;
 82 93658fb9 2020-03-18 stsp }
 83 93658fb9 2020-03-18 stsp 
 84 93658fb9 2020-03-18 stsp int
 85 93658fb9 2020-03-18 stsp flushpkt(int fd)
 86 93658fb9 2020-03-18 stsp {
 87 93658fb9 2020-03-18 stsp 	if(chattygit)
 88 93658fb9 2020-03-18 stsp 		fprintf(stderr, "writepkt: 0000\n");
 89 93658fb9 2020-03-18 stsp 	return write(fd, "0000", 4);
 90 93658fb9 2020-03-18 stsp }
 91 93658fb9 2020-03-18 stsp 
 92 93658fb9 2020-03-18 stsp 
 93 93658fb9 2020-03-18 stsp int
 94 93658fb9 2020-03-18 stsp readpkt(int fd, char *buf, int nbuf)
 95 93658fb9 2020-03-18 stsp {
 96 93658fb9 2020-03-18 stsp 	char len[5];
 97 93658fb9 2020-03-18 stsp 	char *e;
 98 93658fb9 2020-03-18 stsp 	int n, r;
 99 93658fb9 2020-03-18 stsp 
100 93658fb9 2020-03-18 stsp 	if(readn(fd, len, 4) == -1){
101 93658fb9 2020-03-18 stsp 		return -1;
102 93658fb9 2020-03-18 stsp 	}
103 93658fb9 2020-03-18 stsp 	len[4] = 0;
104 93658fb9 2020-03-18 stsp 	n = strtol(len, &e, 16);
105 93658fb9 2020-03-18 stsp 	if(n == 0){
106 93658fb9 2020-03-18 stsp 		if(chattygit)
107 93658fb9 2020-03-18 stsp 			fprintf(stderr, "readpkt: 0000\n");
108 93658fb9 2020-03-18 stsp 		return 0;
109 93658fb9 2020-03-18 stsp 	}
110 93658fb9 2020-03-18 stsp 	if(e != len + 4 || n <= 4)
111 93658fb9 2020-03-18 stsp 		err(1, "invalid packet line length");
112 93658fb9 2020-03-18 stsp 	n  -= 4;
113 93658fb9 2020-03-18 stsp 	if(n >= nbuf)
114 93658fb9 2020-03-18 stsp 		err(1, "buffer too small");
115 93658fb9 2020-03-18 stsp 	if((r = readn(fd, buf, n)) != n)
116 93658fb9 2020-03-18 stsp 		return -1;
117 93658fb9 2020-03-18 stsp 	buf[n] = 0;
118 93658fb9 2020-03-18 stsp 	if(chattygit)
119 93658fb9 2020-03-18 stsp 		fprintf(stderr, "readpkt: %s:\t%.*s\n", len, nbuf, buf);
120 93658fb9 2020-03-18 stsp 	return n;
121 93658fb9 2020-03-18 stsp }
122 93658fb9 2020-03-18 stsp 
123 93658fb9 2020-03-18 stsp int
124 93658fb9 2020-03-18 stsp writepkt(int fd, char *buf, int nbuf)
125 93658fb9 2020-03-18 stsp {
126 93658fb9 2020-03-18 stsp 	char len[5];
127 93658fb9 2020-03-18 stsp 	int i;
128 93658fb9 2020-03-18 stsp 
129 93658fb9 2020-03-18 stsp 	if (snprintf(len, sizeof(len), "%04x", nbuf + 4) >= sizeof(len))
130 93658fb9 2020-03-18 stsp 		return -1;
131 93658fb9 2020-03-18 stsp 	if(write(fd, len, 4) != 4)
132 93658fb9 2020-03-18 stsp 		return -1;
133 93658fb9 2020-03-18 stsp 	if(write(fd, buf, nbuf) != nbuf)
134 93658fb9 2020-03-18 stsp 		return -1;
135 93658fb9 2020-03-18 stsp 	if(chattygit){
136 93658fb9 2020-03-18 stsp 		fprintf(stderr, "writepkt: %s:\t", len);
137 93658fb9 2020-03-18 stsp 		fwrite(buf, 1, nbuf, stderr);
138 93658fb9 2020-03-18 stsp 		for(i = 0; i < nbuf; i++){
139 93658fb9 2020-03-18 stsp 			if(isprint(buf[i]))
140 93658fb9 2020-03-18 stsp 				fputc(buf[i], stderr);
141 93658fb9 2020-03-18 stsp 		}
142 93658fb9 2020-03-18 stsp 	}
143 93658fb9 2020-03-18 stsp 	return 0;
144 93658fb9 2020-03-18 stsp }
145 93658fb9 2020-03-18 stsp 
146 93658fb9 2020-03-18 stsp 
147 93658fb9 2020-03-18 stsp int
148 93658fb9 2020-03-18 stsp got_resolve_remote_ref(struct got_object_id *id, char *ref)
149 93658fb9 2020-03-18 stsp {
150 93658fb9 2020-03-18 stsp 	char buf[128], *s;
151 93658fb9 2020-03-18 stsp 	int r, f;
152 93658fb9 2020-03-18 stsp 
153 93658fb9 2020-03-18 stsp 	ref = strip(ref);
154 93658fb9 2020-03-18 stsp 	if(!got_parse_sha1_digest(id->sha1, ref))
155 93658fb9 2020-03-18 stsp 		return 0;
156 93658fb9 2020-03-18 stsp 
157 93658fb9 2020-03-18 stsp 	/* Slightly special handling: translate remote refs to local ones. */
158 93658fb9 2020-03-18 stsp 	if (strcmp(ref, "HEAD") == 0) {
159 93658fb9 2020-03-18 stsp 		if(snprintf(buf, sizeof(buf), ".git/HEAD") >= sizeof(buf))
160 93658fb9 2020-03-18 stsp 			return -1;
161 93658fb9 2020-03-18 stsp 	} else if(strstr(ref, "refs/heads") == ref) {
162 93658fb9 2020-03-18 stsp 		ref += strlen("refs/heads");
163 93658fb9 2020-03-18 stsp 		if(snprintf(buf, sizeof(buf),
164 93658fb9 2020-03-18 stsp 		    ".git/refs/remotes/%s/%s", upstream, ref) >= sizeof(buf))
165 93658fb9 2020-03-18 stsp 			return -1;
166 93658fb9 2020-03-18 stsp 	} else if(strstr(ref, "refs/tags") == ref) {
167 93658fb9 2020-03-18 stsp 		ref += strlen("refs/tags");
168 93658fb9 2020-03-18 stsp 		if(snprintf(buf, sizeof(buf),
169 93658fb9 2020-03-18 stsp 		    ".git/refs/tags/%s/%s", upstream, ref) >= sizeof(buf))
170 93658fb9 2020-03-18 stsp 			return -1;
171 93658fb9 2020-03-18 stsp 	} else {
172 93658fb9 2020-03-18 stsp 		return -1;
173 93658fb9 2020-03-18 stsp 	}
174 93658fb9 2020-03-18 stsp 
175 93658fb9 2020-03-18 stsp 	r = -1;
176 93658fb9 2020-03-18 stsp 	s = strip(buf);
177 93658fb9 2020-03-18 stsp 	if((f = open(s, O_RDONLY)) == -1)
178 93658fb9 2020-03-18 stsp 		goto err;
179 93658fb9 2020-03-18 stsp 	if(readn(f, buf, sizeof(buf)) < 40)
180 93658fb9 2020-03-18 stsp 		goto err;
181 93658fb9 2020-03-18 stsp 	if(!got_parse_sha1_digest(id->sha1, buf))
182 93658fb9 2020-03-18 stsp 		goto err;
183 93658fb9 2020-03-18 stsp err:
184 93658fb9 2020-03-18 stsp 	close(f);
185 93658fb9 2020-03-18 stsp 	if(r == -1 && strstr(buf, "ref:") == buf)
186 93658fb9 2020-03-18 stsp 		return got_resolve_remote_ref(id, buf + strlen("ref:"));
187 93658fb9 2020-03-18 stsp 	return r;
188 93658fb9 2020-03-18 stsp }
189 93658fb9 2020-03-18 stsp 
190 93658fb9 2020-03-18 stsp static int
191 93658fb9 2020-03-18 stsp got_check_pack_hash(int fd, size_t sz, uint8_t *hcomp)
192 93658fb9 2020-03-18 stsp {
193 93658fb9 2020-03-18 stsp 	SHA1_CTX ctx;
194 93658fb9 2020-03-18 stsp 	uint8_t hexpect[SHA1_DIGEST_LENGTH];
195 93658fb9 2020-03-18 stsp 	char s1[SHA1_DIGEST_STRING_LENGTH + 1];
196 93658fb9 2020-03-18 stsp 	char s2[SHA1_DIGEST_STRING_LENGTH + 1];
197 93658fb9 2020-03-18 stsp 	uint8_t buf[32*1024];
198 93658fb9 2020-03-18 stsp 	ssize_t n, r, nr;
199 93658fb9 2020-03-18 stsp 
200 93658fb9 2020-03-18 stsp 	if(sz < 28)
201 93658fb9 2020-03-18 stsp 		return -1;
202 93658fb9 2020-03-18 stsp 
203 93658fb9 2020-03-18 stsp 	n = 0;
204 93658fb9 2020-03-18 stsp 	SHA1Init(&ctx);
205 93658fb9 2020-03-18 stsp 	while(n < sz - 20){
206 93658fb9 2020-03-18 stsp 		nr = sizeof(buf);
207 93658fb9 2020-03-18 stsp 		if(sz - n - 20 < sizeof(buf))
208 93658fb9 2020-03-18 stsp 			nr = sz - n - 20;
209 93658fb9 2020-03-18 stsp 		r = readn(fd, buf, nr);
210 93658fb9 2020-03-18 stsp 		if(r != nr)
211 93658fb9 2020-03-18 stsp 			return -1;
212 93658fb9 2020-03-18 stsp 		SHA1Update(&ctx, buf, nr);
213 93658fb9 2020-03-18 stsp 		n += r;
214 93658fb9 2020-03-18 stsp 	}
215 93658fb9 2020-03-18 stsp 	SHA1Final(hcomp, &ctx);
216 93658fb9 2020-03-18 stsp 
217 93658fb9 2020-03-18 stsp 	if(readn(fd, hexpect, sizeof(hexpect)) != sizeof(hexpect))
218 93658fb9 2020-03-18 stsp 		errx(1, "truncated packfile");
219 93658fb9 2020-03-18 stsp 	if(memcmp(hcomp, hexpect, SHA1_DIGEST_LENGTH) != 0){
220 93658fb9 2020-03-18 stsp 		got_sha1_digest_to_str(hcomp, s1, sizeof(s1));
221 93658fb9 2020-03-18 stsp 		got_sha1_digest_to_str(hexpect, s2, sizeof(s2));
222 93658fb9 2020-03-18 stsp 		printf("hash mismatch %s != %s\n", s1, s2);
223 93658fb9 2020-03-18 stsp 		return -1;
224 93658fb9 2020-03-18 stsp 	}
225 93658fb9 2020-03-18 stsp 	return 0;
226 93658fb9 2020-03-18 stsp }
227 93658fb9 2020-03-18 stsp 
228 93658fb9 2020-03-18 stsp int
229 93658fb9 2020-03-18 stsp got_has_object(struct got_object_id *obj)
230 93658fb9 2020-03-18 stsp {
231 93658fb9 2020-03-18 stsp 	return 0;
232 93658fb9 2020-03-18 stsp }
233 93658fb9 2020-03-18 stsp 
234 93658fb9 2020-03-18 stsp /*static */int
235 93658fb9 2020-03-18 stsp got_make_pack_dir(char *path)
236 93658fb9 2020-03-18 stsp {
237 93658fb9 2020-03-18 stsp 	char s[128];
238 93658fb9 2020-03-18 stsp 	char *p;
239 93658fb9 2020-03-18 stsp 
240 93658fb9 2020-03-18 stsp 	if(snprintf(s, sizeof(s), "%s", path) >= sizeof(s))
241 93658fb9 2020-03-18 stsp 		return -1;
242 93658fb9 2020-03-18 stsp 	for(p=strchr(s+1, '/'); p; p=strchr(p+1, '/')){
243 93658fb9 2020-03-18 stsp 		*p = 0;
244 93658fb9 2020-03-18 stsp 		if (mkdir(s, 0755) == -1)
245 93658fb9 2020-03-18 stsp 			if(errno != EEXIST)
246 93658fb9 2020-03-18 stsp 				return -1;
247 93658fb9 2020-03-18 stsp 		*p = '/';
248 93658fb9 2020-03-18 stsp 	}
249 93658fb9 2020-03-18 stsp 	return 0;
250 93658fb9 2020-03-18 stsp }
251 93658fb9 2020-03-18 stsp 
252 93658fb9 2020-03-18 stsp static int
253 93658fb9 2020-03-18 stsp got_match_branch(char *br, char *pat)
254 93658fb9 2020-03-18 stsp {
255 93658fb9 2020-03-18 stsp 	char name[128];
256 93658fb9 2020-03-18 stsp 
257 93658fb9 2020-03-18 stsp 	if(strstr(pat, "refs/heads") == pat) {
258 93658fb9 2020-03-18 stsp 		if (snprintf(name, sizeof(name), "%s", pat) >= sizeof(name))
259 93658fb9 2020-03-18 stsp 			return -1;
260 93658fb9 2020-03-18 stsp 	} else if(strstr(pat, "heads")) {
261 93658fb9 2020-03-18 stsp 		if (snprintf(name, sizeof(name), "refs/%s", pat) >= sizeof(name))
262 93658fb9 2020-03-18 stsp 			return -1;
263 93658fb9 2020-03-18 stsp 	} else {
264 93658fb9 2020-03-18 stsp 		if (snprintf(name, sizeof(name), "refs/heads/%s", pat) >= sizeof(name))
265 93658fb9 2020-03-18 stsp 			return -1;
266 93658fb9 2020-03-18 stsp 	}
267 93658fb9 2020-03-18 stsp 	return strcmp(br, name) == 0;
268 93658fb9 2020-03-18 stsp }
269 93658fb9 2020-03-18 stsp 
270 0d0a341c 2020-03-18 stsp static const struct got_error *
271 0d0a341c 2020-03-18 stsp got_tokenize_refline(char **tokens, char *line, int len)
272 93658fb9 2020-03-18 stsp {
273 0d0a341c 2020-03-18 stsp 	const struct got_error *err = NULL;
274 93658fb9 2020-03-18 stsp 	char *p;
275 0d0a341c 2020-03-18 stsp 	size_t i, n = 0;
276 0d0a341c 2020-03-18 stsp 	const int maxtokens = 3;
277 93658fb9 2020-03-18 stsp 
278 0d0a341c 2020-03-18 stsp 	for (i = 0; i < maxtokens; i++)
279 0d0a341c 2020-03-18 stsp 		tokens[i] = NULL;
280 0d0a341c 2020-03-18 stsp 
281 0d0a341c 2020-03-18 stsp 	for (i = 0; n < len && i < maxtokens; i++) {
282 0d0a341c 2020-03-18 stsp 		while (isspace(*line)) {
283 93658fb9 2020-03-18 stsp 			line++;
284 0d0a341c 2020-03-18 stsp 			n++;
285 0d0a341c 2020-03-18 stsp 		}
286 93658fb9 2020-03-18 stsp 		p = line;
287 0d0a341c 2020-03-18 stsp 		while (*line != '\0' &&
288 0d0a341c 2020-03-18 stsp 		    (!isspace(*line) || i == maxtokens - 1)) {
289 93658fb9 2020-03-18 stsp 			line++;
290 0d0a341c 2020-03-18 stsp 			n++;
291 0d0a341c 2020-03-18 stsp 		}
292 0d0a341c 2020-03-18 stsp 		tokens[i] = strndup(p, line - p);
293 0d0a341c 2020-03-18 stsp 		if (tokens[i] == NULL) {
294 0d0a341c 2020-03-18 stsp 			err = got_error_from_errno("strndup");
295 0d0a341c 2020-03-18 stsp 			goto done;
296 0d0a341c 2020-03-18 stsp 		}
297 0d0a341c 2020-03-18 stsp 		/* Skip \0 field-delimiter at end of token. */
298 0d0a341c 2020-03-18 stsp 		while (line[0] == '\0' && n < len) {
299 0d0a341c 2020-03-18 stsp 			line++;
300 0d0a341c 2020-03-18 stsp 			n++;
301 0d0a341c 2020-03-18 stsp 		}
302 93658fb9 2020-03-18 stsp 	}
303 0d0a341c 2020-03-18 stsp 	if (i <= 2)
304 0d0a341c 2020-03-18 stsp 		err = got_error(GOT_ERR_NOT_REF);
305 0d0a341c 2020-03-18 stsp done:
306 0d0a341c 2020-03-18 stsp 	if (err) {
307 0d0a341c 2020-03-18 stsp 		int j;
308 0d0a341c 2020-03-18 stsp 		for (j = 0; j < i; j++)
309 0d0a341c 2020-03-18 stsp 			free(tokens[j]);
310 0d0a341c 2020-03-18 stsp 			tokens[j] = NULL;
311 0d0a341c 2020-03-18 stsp 	}
312 0d0a341c 2020-03-18 stsp 	return err;
313 8a29a085 2020-03-18 stsp }
314 8a29a085 2020-03-18 stsp 
315 8a29a085 2020-03-18 stsp struct got_capability {
316 8a29a085 2020-03-18 stsp 	const char *key;
317 8a29a085 2020-03-18 stsp 	const char *value;
318 8a29a085 2020-03-18 stsp };
319 8a29a085 2020-03-18 stsp static const struct got_capability got_capabilities[] = {
320 8a29a085 2020-03-18 stsp #if 0 /* got-index-pack is not ready for this */
321 8a29a085 2020-03-18 stsp 	{ "ofs-delta", NULL },
322 8a29a085 2020-03-18 stsp #endif
323 8a29a085 2020-03-18 stsp 	{ "agent", "got/" GOT_VERSION_STR },
324 8a29a085 2020-03-18 stsp };
325 8a29a085 2020-03-18 stsp 
326 8a29a085 2020-03-18 stsp static const struct got_error *
327 8a29a085 2020-03-18 stsp match_capability(char **my_capabilities, const char *capa,
328 8a29a085 2020-03-18 stsp     const struct got_capability *mycapa)
329 8a29a085 2020-03-18 stsp {
330 8a29a085 2020-03-18 stsp 	char *equalsign;
331 8a29a085 2020-03-18 stsp 	char *s;
332 8a29a085 2020-03-18 stsp 
333 8a29a085 2020-03-18 stsp 	equalsign = strchr(capa, '=');
334 8a29a085 2020-03-18 stsp 	if (equalsign) {
335 8a29a085 2020-03-18 stsp 		if (strncmp(capa, mycapa->key, equalsign - capa) != 0)
336 8a29a085 2020-03-18 stsp 			return NULL;
337 8a29a085 2020-03-18 stsp 	} else {
338 8a29a085 2020-03-18 stsp 		if (strcmp(capa, mycapa->key) != 0)
339 8a29a085 2020-03-18 stsp 			return NULL;
340 8a29a085 2020-03-18 stsp 	}
341 8a29a085 2020-03-18 stsp 
342 8a29a085 2020-03-18 stsp 	if (asprintf(&s, "%s%s%s%s%s",
343 8a29a085 2020-03-18 stsp 	    *my_capabilities != NULL ? *my_capabilities : "",
344 8a29a085 2020-03-18 stsp 	    *my_capabilities != NULL ? " " : "",
345 8a29a085 2020-03-18 stsp 	    mycapa->key,
346 8a29a085 2020-03-18 stsp 	    mycapa->value != NULL ? "=" : "",
347 8a29a085 2020-03-18 stsp 	    mycapa->value != NULL? mycapa->value : "") == -1)
348 8a29a085 2020-03-18 stsp 		return got_error_from_errno("asprintf");
349 8a29a085 2020-03-18 stsp 
350 8a29a085 2020-03-18 stsp 	free(*my_capabilities);
351 8a29a085 2020-03-18 stsp 	*my_capabilities = s;
352 8a29a085 2020-03-18 stsp 	return NULL;
353 93658fb9 2020-03-18 stsp }
354 93658fb9 2020-03-18 stsp 
355 9ff10419 2020-03-18 stsp static const struct got_error *
356 8a29a085 2020-03-18 stsp match_capabilities(char **my_capabilities, char *server_capabilities)
357 8a29a085 2020-03-18 stsp {
358 8a29a085 2020-03-18 stsp 	const struct got_error *err = NULL;
359 8a29a085 2020-03-18 stsp 	char *capa;
360 8a29a085 2020-03-18 stsp 	int i;
361 8a29a085 2020-03-18 stsp 
362 8a29a085 2020-03-18 stsp 	*my_capabilities = NULL;
363 8a29a085 2020-03-18 stsp 	do {
364 8a29a085 2020-03-18 stsp 		capa = strsep(&server_capabilities, " ");
365 8a29a085 2020-03-18 stsp 		if (capa == NULL)
366 8a29a085 2020-03-18 stsp 			return NULL;
367 8a29a085 2020-03-18 stsp 
368 8a29a085 2020-03-18 stsp 		for (i = 0; i < nitems(got_capabilities); i++) {
369 8a29a085 2020-03-18 stsp 			err = match_capability(my_capabilities,
370 8a29a085 2020-03-18 stsp 			    capa, &got_capabilities[i]);
371 8a29a085 2020-03-18 stsp 			if (err)
372 8a29a085 2020-03-18 stsp 				break;
373 8a29a085 2020-03-18 stsp 		}
374 8a29a085 2020-03-18 stsp 	} while (capa);
375 8a29a085 2020-03-18 stsp 
376 8a29a085 2020-03-18 stsp 	return err;
377 8a29a085 2020-03-18 stsp }
378 8a29a085 2020-03-18 stsp 			
379 8a29a085 2020-03-18 stsp static const struct got_error *
380 8f2d01a6 2020-03-18 stsp fetch_pack(int fd, int packfd, struct got_object_id *packid,
381 8f2d01a6 2020-03-18 stsp     struct imsgbuf *ibuf)
382 93658fb9 2020-03-18 stsp {
383 9ff10419 2020-03-18 stsp 	const struct got_error *err = NULL;
384 ccbf9d19 2020-03-18 stsp 	char buf[GOT_PKTMAX], *sp[3];
385 93658fb9 2020-03-18 stsp 	char hashstr[SHA1_DIGEST_STRING_LENGTH];
386 93658fb9 2020-03-18 stsp 	struct got_object_id *have, *want;
387 8a29a085 2020-03-18 stsp 	int is_firstpkt = 1, nref = 0, refsz = 16;
388 93658fb9 2020-03-18 stsp 	int i, n, req;
389 93658fb9 2020-03-18 stsp 	off_t packsz;
390 8a29a085 2020-03-18 stsp 	char *my_capabilities = NULL;
391 93658fb9 2020-03-18 stsp 
392 93658fb9 2020-03-18 stsp 	have = malloc(refsz * sizeof(have[0]));
393 9ff10419 2020-03-18 stsp 	if (have == NULL)
394 9ff10419 2020-03-18 stsp 		return got_error_from_errno("malloc");
395 93658fb9 2020-03-18 stsp 	want = malloc(refsz * sizeof(want[0]));
396 9ff10419 2020-03-18 stsp 	if (want == NULL) {
397 9ff10419 2020-03-18 stsp 		err = got_error_from_errno("malloc");
398 9ff10419 2020-03-18 stsp 		goto done;
399 9ff10419 2020-03-18 stsp 	}
400 9ff10419 2020-03-18 stsp 	if (chattygit)
401 9ff10419 2020-03-18 stsp 		fprintf(stderr, "starting fetch\n");
402 9ff10419 2020-03-18 stsp 	while (1) {
403 93658fb9 2020-03-18 stsp 		n = readpkt(fd, buf, sizeof(buf));
404 9ff10419 2020-03-18 stsp 		if (n == -1){
405 9b45e112 2020-03-18 stsp 			err = got_error_from_errno("readpkt");
406 9ff10419 2020-03-18 stsp 			goto done;
407 9ff10419 2020-03-18 stsp 		}
408 9ff10419 2020-03-18 stsp 		if (n == 0)
409 93658fb9 2020-03-18 stsp 			break;
410 9ff10419 2020-03-18 stsp 		if (strncmp(buf, "ERR ", 4) == 0) {
411 9ff10419 2020-03-18 stsp 			static char msg[1024];
412 9ff10419 2020-03-18 stsp 			strlcpy(msg, buf + 4, sizeof(msg));
413 9ff10419 2020-03-18 stsp 			err = got_error_msg(GOT_ERR_FETCH_FAILED, msg);
414 9ff10419 2020-03-18 stsp 			goto done;
415 9ff10419 2020-03-18 stsp 		}
416 0d0a341c 2020-03-18 stsp 		err = got_tokenize_refline(sp, buf, n);
417 0d0a341c 2020-03-18 stsp 		if (err)
418 9ff10419 2020-03-18 stsp 			goto done;
419 0d0a341c 2020-03-18 stsp 		if (chattygit && sp[2][0] != '\0')
420 8a29a085 2020-03-18 stsp 			fprintf(stderr, "server capabilities: %s\n", sp[2]);
421 8a29a085 2020-03-18 stsp 		if (is_firstpkt) {
422 8a29a085 2020-03-18 stsp 			err = match_capabilities(&my_capabilities, sp[2]);
423 8a29a085 2020-03-18 stsp 			if (err)
424 8a29a085 2020-03-18 stsp 				goto done;
425 8a29a085 2020-03-18 stsp 			if (chattygit && my_capabilities)
426 8a29a085 2020-03-18 stsp 				fprintf(stderr, "my matched capabilities: %s\n",
427 8a29a085 2020-03-18 stsp 				    my_capabilities);
428 8a29a085 2020-03-18 stsp 		}
429 8a29a085 2020-03-18 stsp 		is_firstpkt = 0;
430 9ff10419 2020-03-18 stsp 		if (strstr(sp[1], "^{}"))
431 93658fb9 2020-03-18 stsp 			continue;
432 9ff10419 2020-03-18 stsp 		if (fetchbranch && !got_match_branch(sp[1], fetchbranch))
433 93658fb9 2020-03-18 stsp 			continue;
434 9ff10419 2020-03-18 stsp 		if (refsz == nref + 1){
435 93658fb9 2020-03-18 stsp 			refsz *= 2;
436 93658fb9 2020-03-18 stsp 			have = realloc(have, refsz * sizeof(have[0]));
437 9ff10419 2020-03-18 stsp 			if (have == NULL) {
438 9ff10419 2020-03-18 stsp 				err = got_error_from_errno("realloc");
439 9ff10419 2020-03-18 stsp 				goto done;
440 9ff10419 2020-03-18 stsp 			}
441 93658fb9 2020-03-18 stsp 			want = realloc(want, refsz * sizeof(want[0]));
442 9ff10419 2020-03-18 stsp 			if (want == NULL) {
443 9ff10419 2020-03-18 stsp 				err = got_error_from_errno("realloc");
444 9ff10419 2020-03-18 stsp 				goto done;
445 9ff10419 2020-03-18 stsp 			}
446 93658fb9 2020-03-18 stsp 		}
447 9ff10419 2020-03-18 stsp 		if (!got_parse_sha1_digest(want[nref].sha1, sp[0])) {
448 9ff10419 2020-03-18 stsp 			err = got_error(GOT_ERR_BAD_OBJ_ID_STR);
449 9ff10419 2020-03-18 stsp 			goto done;
450 9ff10419 2020-03-18 stsp 		}
451 9ff10419 2020-03-18 stsp 
452 93658fb9 2020-03-18 stsp 		if (got_resolve_remote_ref(&have[nref], sp[1]) == -1)
453 93658fb9 2020-03-18 stsp 			memset(&have[nref], 0, sizeof(have[nref]));
454 8f2d01a6 2020-03-18 stsp 		err = got_privsep_send_fetch_progress(ibuf, &want[nref], sp[1]);
455 8f2d01a6 2020-03-18 stsp 		if (err)
456 8f2d01a6 2020-03-18 stsp 			goto done;
457 93658fb9 2020-03-18 stsp 		if (chattygit)
458 93658fb9 2020-03-18 stsp 			fprintf(stderr, "remote %s\n", sp[1]);
459 93658fb9 2020-03-18 stsp 		nref++;
460 93658fb9 2020-03-18 stsp 	}
461 93658fb9 2020-03-18 stsp 
462 93658fb9 2020-03-18 stsp 	req = 0;
463 9ff10419 2020-03-18 stsp 	for (i = 0; i < nref; i++){
464 93658fb9 2020-03-18 stsp 		if (got_object_id_cmp(&have[i], &want[i]) == 0)
465 93658fb9 2020-03-18 stsp 			continue;
466 93658fb9 2020-03-18 stsp 		if (got_has_object(&want[i]))
467 93658fb9 2020-03-18 stsp 			continue;
468 93658fb9 2020-03-18 stsp 		got_sha1_digest_to_str(want[i].sha1, hashstr, sizeof(hashstr));
469 8a29a085 2020-03-18 stsp 		n = snprintf(buf, sizeof(buf), "want %s%s\n", hashstr,
470 8a29a085 2020-03-18 stsp 		   i == 0 && my_capabilities ? my_capabilities : "");
471 9ff10419 2020-03-18 stsp 		if (n >= sizeof(buf)) {
472 9ff10419 2020-03-18 stsp 			err = got_error(GOT_ERR_NO_SPACE);
473 9ff10419 2020-03-18 stsp 			goto done;
474 9ff10419 2020-03-18 stsp 		}
475 9ff10419 2020-03-18 stsp 		if (writepkt(fd, buf, n) == -1) {
476 9ff10419 2020-03-18 stsp 			err = got_error_from_errno("writepkt");
477 9ff10419 2020-03-18 stsp 			goto done;
478 9ff10419 2020-03-18 stsp 		}
479 93658fb9 2020-03-18 stsp 		req = 1;
480 93658fb9 2020-03-18 stsp 	}
481 93658fb9 2020-03-18 stsp 	flushpkt(fd);
482 9ff10419 2020-03-18 stsp 	for (i = 0; i < nref; i++){
483 93658fb9 2020-03-18 stsp 		if (got_object_id_cmp(&have[i], &zhash) == 0)
484 93658fb9 2020-03-18 stsp 			continue;
485 93658fb9 2020-03-18 stsp 		got_sha1_digest_to_str(want[i].sha1, hashstr, sizeof(hashstr));
486 93658fb9 2020-03-18 stsp 		n = snprintf(buf, sizeof(buf), "have %s\n", hashstr);
487 9ff10419 2020-03-18 stsp 		if (n >= sizeof(buf)) {
488 9ff10419 2020-03-18 stsp 			err = got_error(GOT_ERR_NO_SPACE);
489 9ff10419 2020-03-18 stsp 			goto done;
490 9ff10419 2020-03-18 stsp 		}
491 9ff10419 2020-03-18 stsp 		if (writepkt(fd, buf, n + 1) == -1) {
492 9ff10419 2020-03-18 stsp 			err = got_error_from_errno("writepkt");
493 9ff10419 2020-03-18 stsp 			goto done;
494 9ff10419 2020-03-18 stsp 		}
495 93658fb9 2020-03-18 stsp 	}
496 9ff10419 2020-03-18 stsp 	if (!req){
497 93658fb9 2020-03-18 stsp 		fprintf(stderr, "up to date\n");
498 93658fb9 2020-03-18 stsp 		flushpkt(fd);
499 93658fb9 2020-03-18 stsp 	}
500 93658fb9 2020-03-18 stsp 	n = snprintf(buf, sizeof(buf), "done\n");
501 9ff10419 2020-03-18 stsp 	if (writepkt(fd, buf, n) == -1) {
502 9ff10419 2020-03-18 stsp 		err = got_error_from_errno("writepkt");
503 9ff10419 2020-03-18 stsp 		goto done;
504 9ff10419 2020-03-18 stsp 	}
505 9ff10419 2020-03-18 stsp 	if (!req)
506 93658fb9 2020-03-18 stsp 		return 0;
507 93658fb9 2020-03-18 stsp 
508 9ff10419 2020-03-18 stsp 	if ((n = readpkt(fd, buf, sizeof(buf))) == -1) {
509 9ff10419 2020-03-18 stsp 		err = got_error_from_errno("readpkt");
510 9ff10419 2020-03-18 stsp 		goto done;
511 9ff10419 2020-03-18 stsp 	}
512 93658fb9 2020-03-18 stsp 	buf[n] = 0;
513 93658fb9 2020-03-18 stsp 
514 8f2d01a6 2020-03-18 stsp 	if (chattygit)
515 8f2d01a6 2020-03-18 stsp 		fprintf(stderr, "fetching...\n");
516 93658fb9 2020-03-18 stsp 	packsz = 0;
517 9ff10419 2020-03-18 stsp 	while (1) {
518 9ff10419 2020-03-18 stsp 		ssize_t w;
519 93658fb9 2020-03-18 stsp 		n = readn(fd, buf, sizeof buf);
520 9ff10419 2020-03-18 stsp 		if (n == 0)
521 93658fb9 2020-03-18 stsp 			break;
522 9ff10419 2020-03-18 stsp 		if (n == -1) {
523 9ff10419 2020-03-18 stsp 			err = got_error_from_errno("readn");
524 9ff10419 2020-03-18 stsp 			goto done;
525 9ff10419 2020-03-18 stsp 		}
526 9ff10419 2020-03-18 stsp 		w = write(packfd, buf, n);
527 9ff10419 2020-03-18 stsp 		if (w == -1) {
528 9ff10419 2020-03-18 stsp 			err = got_error_from_errno("write");
529 9ff10419 2020-03-18 stsp 			goto done;
530 9ff10419 2020-03-18 stsp 		}
531 9ff10419 2020-03-18 stsp 		if (w != n) {
532 9ff10419 2020-03-18 stsp 			err = got_error(GOT_ERR_IO);
533 9ff10419 2020-03-18 stsp 			goto done;
534 9ff10419 2020-03-18 stsp 		}
535 93658fb9 2020-03-18 stsp 		packsz += n;
536 93658fb9 2020-03-18 stsp 	}
537 9ff10419 2020-03-18 stsp 	if (lseek(packfd, 0, SEEK_SET) == -1) {
538 9ff10419 2020-03-18 stsp 		err = got_error_from_errno("lseek");
539 9ff10419 2020-03-18 stsp 		goto done;
540 9ff10419 2020-03-18 stsp 	}
541 9ff10419 2020-03-18 stsp 	if (got_check_pack_hash(packfd, packsz, packid->sha1) == -1)
542 9ff10419 2020-03-18 stsp 		err = got_error(GOT_ERR_BAD_PACKFILE);
543 9ff10419 2020-03-18 stsp done:
544 9ff10419 2020-03-18 stsp 	free(have);
545 9ff10419 2020-03-18 stsp 	free(want);
546 8f2d01a6 2020-03-18 stsp 	return err;
547 93658fb9 2020-03-18 stsp }
548 93658fb9 2020-03-18 stsp 
549 93658fb9 2020-03-18 stsp 
550 93658fb9 2020-03-18 stsp int
551 93658fb9 2020-03-18 stsp main(int argc, char **argv)
552 93658fb9 2020-03-18 stsp {
553 93658fb9 2020-03-18 stsp 	const struct got_error *err = NULL;
554 9ff10419 2020-03-18 stsp 	int fetchfd, packfd = -1;
555 93658fb9 2020-03-18 stsp 	struct got_object_id packid;
556 93658fb9 2020-03-18 stsp 	struct imsgbuf ibuf;
557 93658fb9 2020-03-18 stsp 	struct imsg imsg;
558 93658fb9 2020-03-18 stsp 
559 93658fb9 2020-03-18 stsp 	if(getenv("GOT_DEBUG") != NULL){
560 93658fb9 2020-03-18 stsp 		fprintf(stderr, "fetch-pack being chatty!\n");
561 93658fb9 2020-03-18 stsp 		chattygit = 1;
562 93658fb9 2020-03-18 stsp 	}
563 93658fb9 2020-03-18 stsp 
564 93658fb9 2020-03-18 stsp 	imsg_init(&ibuf, GOT_IMSG_FD_CHILD);
565 93658fb9 2020-03-18 stsp 	if((err = got_privsep_recv_imsg(&imsg, &ibuf, 0)) != 0) {
566 93658fb9 2020-03-18 stsp 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
567 93658fb9 2020-03-18 stsp 			err = NULL;
568 93658fb9 2020-03-18 stsp 		goto done;
569 93658fb9 2020-03-18 stsp 	}
570 93658fb9 2020-03-18 stsp 	if (imsg.hdr.type == GOT_IMSG_STOP)
571 93658fb9 2020-03-18 stsp 		goto done;
572 93658fb9 2020-03-18 stsp 	if (imsg.hdr.type != GOT_IMSG_FETCH_REQUEST) {
573 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_MSG);
574 93658fb9 2020-03-18 stsp 		goto done;
575 93658fb9 2020-03-18 stsp 	}
576 93658fb9 2020-03-18 stsp 	if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
577 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_LEN);
578 93658fb9 2020-03-18 stsp 		goto done;
579 93658fb9 2020-03-18 stsp 	}
580 93658fb9 2020-03-18 stsp 	fetchfd = imsg.fd;
581 93658fb9 2020-03-18 stsp 
582 93658fb9 2020-03-18 stsp 	if((err = got_privsep_recv_imsg(&imsg, &ibuf, 0)) != 0) {
583 93658fb9 2020-03-18 stsp 		if (err->code == GOT_ERR_PRIVSEP_PIPE)
584 93658fb9 2020-03-18 stsp 			err = NULL;
585 93658fb9 2020-03-18 stsp 		goto done;
586 93658fb9 2020-03-18 stsp 	}
587 93658fb9 2020-03-18 stsp 	if (imsg.hdr.type == GOT_IMSG_STOP)
588 93658fb9 2020-03-18 stsp 		goto done;
589 93658fb9 2020-03-18 stsp 	if (imsg.hdr.type != GOT_IMSG_TMPFD) {
590 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_MSG);
591 93658fb9 2020-03-18 stsp 		goto done;
592 93658fb9 2020-03-18 stsp 	}
593 93658fb9 2020-03-18 stsp 	if (imsg.hdr.len - IMSG_HEADER_SIZE != 0) {
594 93658fb9 2020-03-18 stsp 		err = got_error(GOT_ERR_PRIVSEP_LEN);
595 93658fb9 2020-03-18 stsp 		goto done;
596 93658fb9 2020-03-18 stsp 	}
597 93658fb9 2020-03-18 stsp 	packfd = imsg.fd;
598 93658fb9 2020-03-18 stsp 
599 8f2d01a6 2020-03-18 stsp 	err = fetch_pack(fetchfd, packfd, &packid, &ibuf);
600 9ff10419 2020-03-18 stsp 	if (err)
601 93658fb9 2020-03-18 stsp 		goto done;
602 93658fb9 2020-03-18 stsp done:
603 9ff10419 2020-03-18 stsp 	if (packfd != -1 && close(packfd) == -1 && err == NULL)
604 9ff10419 2020-03-18 stsp 		err = got_error_from_errno("close");
605 9ff10419 2020-03-18 stsp 	if (err != NULL)
606 93658fb9 2020-03-18 stsp 		got_privsep_send_error(&ibuf, err);
607 93658fb9 2020-03-18 stsp 	else
608 93658fb9 2020-03-18 stsp 		err = got_privsep_send_fetch_done(&ibuf, packid);
609 93658fb9 2020-03-18 stsp 	if(err != NULL) {
610 93658fb9 2020-03-18 stsp 		fprintf(stderr, "%s: %s\n", getprogname(), err->msg);
611 93658fb9 2020-03-18 stsp 		got_privsep_send_error(&ibuf, err);
612 93658fb9 2020-03-18 stsp 	}
613 93658fb9 2020-03-18 stsp 
614 93658fb9 2020-03-18 stsp 	exit(0);
615 93658fb9 2020-03-18 stsp }