2 13b2bc37 2022-10-23 stsp * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 13b2bc37 2022-10-23 stsp * Permission to use, copy, modify, and distribute this software for any
5 13b2bc37 2022-10-23 stsp * purpose with or without fee is hereby granted, provided that the above
6 13b2bc37 2022-10-23 stsp * copyright notice and this permission notice appear in all copies.
8 13b2bc37 2022-10-23 stsp * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 13b2bc37 2022-10-23 stsp * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 13b2bc37 2022-10-23 stsp * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 13b2bc37 2022-10-23 stsp * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 13b2bc37 2022-10-23 stsp * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 13b2bc37 2022-10-23 stsp * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 13b2bc37 2022-10-23 stsp * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 13b2bc37 2022-10-23 stsp #include <sys/types.h>
18 13b2bc37 2022-10-23 stsp #include <sys/queue.h>
19 13b2bc37 2022-10-23 stsp #include <sys/uio.h>
21 13b2bc37 2022-10-23 stsp #include <errno.h>
22 13b2bc37 2022-10-23 stsp #include <event.h>
23 13b2bc37 2022-10-23 stsp #include <poll.h>
24 13b2bc37 2022-10-23 stsp #include <limits.h>
25 13b2bc37 2022-10-23 stsp #include <sha1.h>
26 13b2bc37 2022-10-23 stsp #include <stdio.h>
27 13b2bc37 2022-10-23 stsp #include <stdint.h>
28 13b2bc37 2022-10-23 stsp #include <stdlib.h>
29 13b2bc37 2022-10-23 stsp #include <string.h>
30 13b2bc37 2022-10-23 stsp #include <imsg.h>
31 13b2bc37 2022-10-23 stsp #include <unistd.h>
33 13b2bc37 2022-10-23 stsp #include "got_error.h"
34 13b2bc37 2022-10-23 stsp #include "got_serve.h"
35 13b2bc37 2022-10-23 stsp #include "got_path.h"
36 13b2bc37 2022-10-23 stsp #include "got_version.h"
37 13b2bc37 2022-10-23 stsp #include "got_reference.h"
39 13b2bc37 2022-10-23 stsp #include "got_lib_pkt.h"
40 13b2bc37 2022-10-23 stsp #include "got_lib_dial.h"
41 13b2bc37 2022-10-23 stsp #include "got_lib_gitproto.h"
42 13b2bc37 2022-10-23 stsp #include "got_lib_sha1.h"
43 13b2bc37 2022-10-23 stsp #include "got_lib_poll.h"
45 13b2bc37 2022-10-23 stsp #include "gotd.h"
47 13b2bc37 2022-10-23 stsp #ifndef nitems
48 13b2bc37 2022-10-23 stsp #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
51 13b2bc37 2022-10-23 stsp static const struct got_capability read_capabilities[] = {
52 13b2bc37 2022-10-23 stsp { GOT_CAPA_AGENT, "got/" GOT_VERSION_STR },
53 13b2bc37 2022-10-23 stsp { GOT_CAPA_OFS_DELTA, NULL },
54 13b2bc37 2022-10-23 stsp { GOT_CAPA_SIDE_BAND_64K, NULL },
57 13b2bc37 2022-10-23 stsp static const struct got_capability write_capabilities[] = {
58 13b2bc37 2022-10-23 stsp { GOT_CAPA_AGENT, "got/" GOT_VERSION_STR },
59 13b2bc37 2022-10-23 stsp { GOT_CAPA_OFS_DELTA, NULL },
60 13b2bc37 2022-10-23 stsp { GOT_CAPA_REPORT_STATUS, NULL },
61 13b2bc37 2022-10-23 stsp { GOT_CAPA_NO_THIN, NULL },
63 13b2bc37 2022-10-23 stsp { GOT_CAPA_DELETE_REFS, NULL },
67 13b2bc37 2022-10-23 stsp static const struct got_error *
68 13b2bc37 2022-10-23 stsp parse_command(char **command, char **repo_path, const char *gitcmd)
70 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
71 13b2bc37 2022-10-23 stsp size_t len, cmdlen, pathlen;
72 13b2bc37 2022-10-23 stsp char *path0 = NULL, *path, *abspath = NULL, *canonpath = NULL;
73 13b2bc37 2022-10-23 stsp const char *relpath;
75 13b2bc37 2022-10-23 stsp *command = NULL;
76 13b2bc37 2022-10-23 stsp *repo_path = NULL;
78 13b2bc37 2022-10-23 stsp len = strlen(gitcmd);
80 13b2bc37 2022-10-23 stsp if (len >= strlen(GOT_SERVE_CMD_SEND) &&
81 13b2bc37 2022-10-23 stsp strncmp(gitcmd, GOT_SERVE_CMD_SEND,
82 13b2bc37 2022-10-23 stsp strlen(GOT_SERVE_CMD_SEND)) == 0)
83 13b2bc37 2022-10-23 stsp cmdlen = strlen(GOT_SERVE_CMD_SEND);
84 13b2bc37 2022-10-23 stsp else if (len >= strlen(GOT_SERVE_CMD_FETCH) &&
85 13b2bc37 2022-10-23 stsp strncmp(gitcmd, GOT_SERVE_CMD_FETCH,
86 13b2bc37 2022-10-23 stsp strlen(GOT_SERVE_CMD_FETCH)) == 0)
87 13b2bc37 2022-10-23 stsp cmdlen = strlen(GOT_SERVE_CMD_FETCH);
89 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_PACKET);
91 13b2bc37 2022-10-23 stsp if (len <= cmdlen + 1 || gitcmd[cmdlen] != ' ')
92 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_PACKET);
94 13b2bc37 2022-10-23 stsp if (memchr(&gitcmd[cmdlen + 1], '\0', len - cmdlen) == NULL)
95 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_PATH);
97 13b2bc37 2022-10-23 stsp /* Forbid linefeeds in paths, like Git does. */
98 13b2bc37 2022-10-23 stsp if (memchr(&gitcmd[cmdlen + 1], '\n', len - cmdlen) != NULL)
99 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_PATH);
101 13b2bc37 2022-10-23 stsp path0 = strdup(&gitcmd[cmdlen + 1]);
102 13b2bc37 2022-10-23 stsp if (path0 == NULL)
103 13b2bc37 2022-10-23 stsp return got_error_from_errno("strdup");
104 13b2bc37 2022-10-23 stsp path = path0;
105 13b2bc37 2022-10-23 stsp pathlen = strlen(path);
108 13b2bc37 2022-10-23 stsp * Git clients send a shell command.
109 13b2bc37 2022-10-23 stsp * Trim spaces and quotes around the path.
111 13b2bc37 2022-10-23 stsp while (path[0] == '\'' || path[0] == '\"' || path[0] == ' ') {
115 13b2bc37 2022-10-23 stsp while (pathlen > 0 &&
116 13b2bc37 2022-10-23 stsp (path[pathlen - 1] == '\'' || path[pathlen - 1] == '\"' ||
117 13b2bc37 2022-10-23 stsp path[pathlen - 1] == ' ')) {
118 13b2bc37 2022-10-23 stsp path[pathlen - 1] = '\0';
122 13b2bc37 2022-10-23 stsp /* Deny an empty repository path. */
123 13b2bc37 2022-10-23 stsp if (path[0] == '\0' || got_path_is_root_dir(path)) {
124 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_NOT_GIT_REPO);
128 13b2bc37 2022-10-23 stsp if (asprintf(&abspath, "/%s", path) == -1) {
129 13b2bc37 2022-10-23 stsp err = got_error_from_errno("asprintf");
132 13b2bc37 2022-10-23 stsp pathlen = strlen(abspath);
133 13b2bc37 2022-10-23 stsp canonpath = malloc(pathlen);
134 13b2bc37 2022-10-23 stsp if (canonpath == NULL) {
135 13b2bc37 2022-10-23 stsp err = got_error_from_errno("malloc");
138 13b2bc37 2022-10-23 stsp err = got_canonpath(abspath, canonpath, pathlen);
142 13b2bc37 2022-10-23 stsp relpath = canonpath;
143 13b2bc37 2022-10-23 stsp while (relpath[0] == '/')
145 13b2bc37 2022-10-23 stsp *repo_path = strdup(relpath);
146 13b2bc37 2022-10-23 stsp if (*repo_path == NULL) {
147 13b2bc37 2022-10-23 stsp err = got_error_from_errno("strdup");
150 13b2bc37 2022-10-23 stsp *command = strndup(gitcmd, cmdlen);
151 13b2bc37 2022-10-23 stsp if (*command == NULL)
152 13b2bc37 2022-10-23 stsp err = got_error_from_errno("strndup");
154 13b2bc37 2022-10-23 stsp free(path0);
155 13b2bc37 2022-10-23 stsp free(abspath);
156 13b2bc37 2022-10-23 stsp free(canonpath);
158 13b2bc37 2022-10-23 stsp free(*repo_path);
159 13b2bc37 2022-10-23 stsp *repo_path = NULL;
161 13b2bc37 2022-10-23 stsp return err;
164 13b2bc37 2022-10-23 stsp static const struct got_error *
165 13b2bc37 2022-10-23 stsp append_read_capabilities(size_t *capalen, size_t len, const char *symrefstr,
166 13b2bc37 2022-10-23 stsp uint8_t *buf, size_t bufsize)
168 13b2bc37 2022-10-23 stsp struct got_capability capa[nitems(read_capabilities) + 1];
169 13b2bc37 2022-10-23 stsp size_t ncapa;
171 13b2bc37 2022-10-23 stsp memcpy(&capa, read_capabilities, sizeof(read_capabilities));
172 13b2bc37 2022-10-23 stsp if (symrefstr) {
173 13b2bc37 2022-10-23 stsp capa[nitems(read_capabilities)].key = "symref";
174 13b2bc37 2022-10-23 stsp capa[nitems(read_capabilities)].value = symrefstr;
175 13b2bc37 2022-10-23 stsp ncapa = nitems(capa);
177 13b2bc37 2022-10-23 stsp ncapa = nitems(read_capabilities);
179 13b2bc37 2022-10-23 stsp return got_gitproto_append_capabilities(capalen, buf, len,
180 13b2bc37 2022-10-23 stsp bufsize, capa, ncapa);
183 13b2bc37 2022-10-23 stsp static const struct got_error *
184 13b2bc37 2022-10-23 stsp send_ref(int outfd, uint8_t *id, const char *refname, int send_capabilities,
185 13b2bc37 2022-10-23 stsp int client_is_reading, const char *symrefstr, int chattygot)
187 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
188 13b2bc37 2022-10-23 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
189 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
190 13b2bc37 2022-10-23 stsp size_t len, capalen = 0;
192 758dc042 2022-11-06 stsp if (got_sha1_digest_to_str(id, hex, sizeof(hex)) == NULL)
193 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_OBJ_ID);
195 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "%s %s", hex, refname);
196 13b2bc37 2022-10-23 stsp if (len >= sizeof(buf))
197 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_NO_SPACE);
199 13b2bc37 2022-10-23 stsp if (send_capabilities) {
200 13b2bc37 2022-10-23 stsp if (client_is_reading) {
201 13b2bc37 2022-10-23 stsp err = append_read_capabilities(&capalen, len,
202 13b2bc37 2022-10-23 stsp symrefstr, buf, sizeof(buf));
204 13b2bc37 2022-10-23 stsp err = got_gitproto_append_capabilities(&capalen,
205 13b2bc37 2022-10-23 stsp buf, len, sizeof(buf), write_capabilities,
206 13b2bc37 2022-10-23 stsp nitems(write_capabilities));
209 13b2bc37 2022-10-23 stsp return err;
210 13b2bc37 2022-10-23 stsp len += capalen;
213 13b2bc37 2022-10-23 stsp if (len + 1 >= sizeof(buf))
214 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_NO_SPACE);
215 13b2bc37 2022-10-23 stsp buf[len] = '\n';
217 13b2bc37 2022-10-23 stsp buf[len] = '\0';
219 13b2bc37 2022-10-23 stsp return got_pkt_writepkt(outfd, buf, len, chattygot);
222 13b2bc37 2022-10-23 stsp static const struct got_error *
223 2ff9f081 2022-11-08 stsp send_zero_refs(int outfd, int client_is_reading, int chattygot)
225 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
226 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
227 13b2bc37 2022-10-23 stsp uint8_t zero[SHA1_DIGEST_LENGTH];
228 13b2bc37 2022-10-23 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
229 13b2bc37 2022-10-23 stsp size_t len, capalen = 0;
231 13b2bc37 2022-10-23 stsp memset(&zero, 0, sizeof(zero));
233 758dc042 2022-11-06 stsp if (got_sha1_digest_to_str(zero, hex, sizeof(hex)) == NULL)
234 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_OBJ_ID);
236 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "%s capabilities^{}", hex);
237 13b2bc37 2022-10-23 stsp if (len >= sizeof(buf))
238 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_NO_SPACE);
240 2ff9f081 2022-11-08 stsp if (client_is_reading) {
241 2ff9f081 2022-11-08 stsp err = got_gitproto_append_capabilities(&capalen, buf, len,
242 2ff9f081 2022-11-08 stsp sizeof(buf), read_capabilities, nitems(read_capabilities));
244 2ff9f081 2022-11-08 stsp return err;
246 2ff9f081 2022-11-08 stsp err = got_gitproto_append_capabilities(&capalen, buf, len,
247 2ff9f081 2022-11-08 stsp sizeof(buf), write_capabilities,
248 2ff9f081 2022-11-08 stsp nitems(write_capabilities));
250 2ff9f081 2022-11-08 stsp return err;
253 c6b5adb8 2022-11-07 stsp return got_pkt_writepkt(outfd, buf, len + capalen, chattygot);
256 13b2bc37 2022-10-23 stsp static void
257 13b2bc37 2022-10-23 stsp echo_error(const struct got_error *err, int outfd, int chattygot)
259 13b2bc37 2022-10-23 stsp char buf[4 + GOT_ERR_MAX_MSG_SIZE];
260 13b2bc37 2022-10-23 stsp size_t len;
263 13b2bc37 2022-10-23 stsp * Echo the error to the client on a pkt-line.
264 13b2bc37 2022-10-23 stsp * The client should then terminate its session.
266 13b2bc37 2022-10-23 stsp buf[0] = 'E'; buf[1] = 'R'; buf[2] = 'R'; buf[3] = ' '; buf[4] = '\0';
267 13b2bc37 2022-10-23 stsp len = strlcat(buf, err->msg, sizeof(buf));
268 d10629e6 2022-12-08 stsp got_pkt_writepkt(outfd, buf, len, chattygot);
271 13b2bc37 2022-10-23 stsp static const struct got_error *
272 13b2bc37 2022-10-23 stsp announce_refs(int outfd, struct imsgbuf *ibuf, int client_is_reading,
273 13b2bc37 2022-10-23 stsp const char *repo_path, int chattygot)
275 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
276 13b2bc37 2022-10-23 stsp struct imsg imsg;
277 13b2bc37 2022-10-23 stsp size_t datalen;
278 13b2bc37 2022-10-23 stsp struct gotd_imsg_list_refs lsref;
279 13b2bc37 2022-10-23 stsp struct gotd_imsg_reflist ireflist;
280 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref iref;
281 13b2bc37 2022-10-23 stsp struct gotd_imsg_symref isymref;
282 13b2bc37 2022-10-23 stsp size_t nrefs = 0;
283 13b2bc37 2022-10-23 stsp int have_nrefs = 0, sent_capabilities = 0;
284 13b2bc37 2022-10-23 stsp char *symrefname = NULL, *symreftarget = NULL, *symrefstr = NULL;
285 13b2bc37 2022-10-23 stsp char *refname = NULL;
287 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
288 13b2bc37 2022-10-23 stsp memset(&lsref, 0, sizeof(lsref));
290 13b2bc37 2022-10-23 stsp if (strlcpy(lsref.repo_name, repo_path, sizeof(lsref.repo_name)) >=
291 13b2bc37 2022-10-23 stsp sizeof(lsref.repo_name))
292 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_NO_SPACE);
293 13b2bc37 2022-10-23 stsp lsref.client_is_reading = client_is_reading;
295 13b2bc37 2022-10-23 stsp if (imsg_compose(ibuf, GOTD_IMSG_LIST_REFS, 0, 0, -1,
296 13b2bc37 2022-10-23 stsp &lsref, sizeof(lsref)) == -1)
297 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_compose LIST_REFS");
299 13b2bc37 2022-10-23 stsp err = gotd_imsg_flush(ibuf);
301 13b2bc37 2022-10-23 stsp return err;
303 13b2bc37 2022-10-23 stsp while (!have_nrefs || nrefs > 0) {
304 13b2bc37 2022-10-23 stsp err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
307 13b2bc37 2022-10-23 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
308 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
309 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
310 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(NULL, &imsg);
312 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REFLIST:
313 13b2bc37 2022-10-23 stsp if (have_nrefs || nrefs > 0) {
314 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
317 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ireflist)) {
318 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
321 13b2bc37 2022-10-23 stsp memcpy(&ireflist, imsg.data, sizeof(ireflist));
322 13b2bc37 2022-10-23 stsp nrefs = ireflist.nrefs;
323 13b2bc37 2022-10-23 stsp have_nrefs = 1;
324 13b2bc37 2022-10-23 stsp if (nrefs == 0)
325 2ff9f081 2022-11-08 stsp err = send_zero_refs(outfd, client_is_reading,
326 2ff9f081 2022-11-08 stsp chattygot);
328 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF:
329 13b2bc37 2022-10-23 stsp if (!have_nrefs || nrefs == 0) {
330 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
333 13b2bc37 2022-10-23 stsp if (datalen < sizeof(iref)) {
334 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
337 13b2bc37 2022-10-23 stsp memcpy(&iref, imsg.data, sizeof(iref));
338 13b2bc37 2022-10-23 stsp if (datalen != sizeof(iref) + iref.name_len) {
339 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
342 13b2bc37 2022-10-23 stsp refname = malloc(iref.name_len + 1);
343 13b2bc37 2022-10-23 stsp if (refname == NULL) {
344 13b2bc37 2022-10-23 stsp err = got_error_from_errno("malloc");
347 13b2bc37 2022-10-23 stsp memcpy(refname, imsg.data + sizeof(iref),
348 13b2bc37 2022-10-23 stsp iref.name_len);
349 13b2bc37 2022-10-23 stsp refname[iref.name_len] = '\0';
350 13b2bc37 2022-10-23 stsp err = send_ref(outfd, iref.id, refname,
351 13b2bc37 2022-10-23 stsp !sent_capabilities, client_is_reading,
352 13b2bc37 2022-10-23 stsp NULL, chattygot);
353 13b2bc37 2022-10-23 stsp free(refname);
354 13b2bc37 2022-10-23 stsp refname = NULL;
357 13b2bc37 2022-10-23 stsp sent_capabilities = 1;
358 13b2bc37 2022-10-23 stsp if (nrefs > 0)
361 13b2bc37 2022-10-23 stsp case GOTD_IMSG_SYMREF:
362 13b2bc37 2022-10-23 stsp if (!have_nrefs || nrefs == 0) {
363 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
366 13b2bc37 2022-10-23 stsp if (datalen < sizeof(isymref)) {
367 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
370 13b2bc37 2022-10-23 stsp memcpy(&isymref, imsg.data, sizeof(isymref));
371 13b2bc37 2022-10-23 stsp if (datalen != sizeof(isymref) + isymref.name_len +
372 13b2bc37 2022-10-23 stsp isymref.target_len) {
373 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
378 13b2bc37 2022-10-23 stsp * For now, we only announce one symbolic ref,
379 13b2bc37 2022-10-23 stsp * as part of our capability advertisement.
381 13b2bc37 2022-10-23 stsp if (sent_capabilities || symrefstr != NULL ||
382 13b2bc37 2022-10-23 stsp symrefname != NULL || symreftarget != NULL)
385 13b2bc37 2022-10-23 stsp symrefname = malloc(isymref.name_len + 1);
386 13b2bc37 2022-10-23 stsp if (symrefname == NULL) {
387 13b2bc37 2022-10-23 stsp err = got_error_from_errno("malloc");
390 13b2bc37 2022-10-23 stsp memcpy(symrefname, imsg.data + sizeof(isymref),
391 13b2bc37 2022-10-23 stsp isymref.name_len);
392 13b2bc37 2022-10-23 stsp symrefname[isymref.name_len] = '\0';
394 13b2bc37 2022-10-23 stsp symreftarget = malloc(isymref.target_len + 1);
395 13b2bc37 2022-10-23 stsp if (symreftarget == NULL) {
396 13b2bc37 2022-10-23 stsp err = got_error_from_errno("malloc");
399 13b2bc37 2022-10-23 stsp memcpy(symreftarget,
400 13b2bc37 2022-10-23 stsp imsg.data + sizeof(isymref) + isymref.name_len,
401 13b2bc37 2022-10-23 stsp isymref.target_len);
402 13b2bc37 2022-10-23 stsp symreftarget[isymref.target_len] = '\0';
404 13b2bc37 2022-10-23 stsp if (asprintf(&symrefstr, "%s:%s", symrefname,
405 13b2bc37 2022-10-23 stsp symreftarget) == -1) {
406 13b2bc37 2022-10-23 stsp err = got_error_from_errno("asprintf");
409 13b2bc37 2022-10-23 stsp err = send_ref(outfd, isymref.target_id, symrefname,
410 13b2bc37 2022-10-23 stsp !sent_capabilities, client_is_reading, symrefstr,
411 13b2bc37 2022-10-23 stsp chattygot);
412 13b2bc37 2022-10-23 stsp free(refname);
413 13b2bc37 2022-10-23 stsp refname = NULL;
416 13b2bc37 2022-10-23 stsp sent_capabilities = 1;
417 13b2bc37 2022-10-23 stsp if (nrefs > 0)
421 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
425 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
428 13b2bc37 2022-10-23 stsp err = got_pkt_flushpkt(outfd, chattygot);
432 13b2bc37 2022-10-23 stsp free(symrefstr);
433 13b2bc37 2022-10-23 stsp free(symrefname);
434 13b2bc37 2022-10-23 stsp free(symreftarget);
435 13b2bc37 2022-10-23 stsp return err;
438 13b2bc37 2022-10-23 stsp static const struct got_error *
439 13b2bc37 2022-10-23 stsp parse_want_line(char **common_capabilities, uint8_t *id, char *buf, size_t len)
441 13b2bc37 2022-10-23 stsp const struct got_error *err;
442 13b2bc37 2022-10-23 stsp char *id_str = NULL, *client_capabilities = NULL;
444 13b2bc37 2022-10-23 stsp err = got_gitproto_parse_want_line(&id_str,
445 13b2bc37 2022-10-23 stsp &client_capabilities, buf, len);
447 13b2bc37 2022-10-23 stsp return err;
449 13b2bc37 2022-10-23 stsp if (!got_parse_sha1_digest(id, id_str)) {
450 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
451 13b2bc37 2022-10-23 stsp "want-line with bad object ID");
455 13b2bc37 2022-10-23 stsp if (client_capabilities) {
456 13b2bc37 2022-10-23 stsp err = got_gitproto_match_capabilities(common_capabilities,
457 13b2bc37 2022-10-23 stsp NULL, client_capabilities, read_capabilities,
458 13b2bc37 2022-10-23 stsp nitems(read_capabilities));
463 13b2bc37 2022-10-23 stsp free(id_str);
464 13b2bc37 2022-10-23 stsp free(client_capabilities);
465 13b2bc37 2022-10-23 stsp return err;
468 13b2bc37 2022-10-23 stsp static const struct got_error *
469 13b2bc37 2022-10-23 stsp parse_have_line(uint8_t *id, char *buf, size_t len)
471 13b2bc37 2022-10-23 stsp const struct got_error *err;
472 13b2bc37 2022-10-23 stsp char *id_str = NULL;
474 13b2bc37 2022-10-23 stsp err = got_gitproto_parse_have_line(&id_str, buf, len);
476 13b2bc37 2022-10-23 stsp return err;
478 13b2bc37 2022-10-23 stsp if (!got_parse_sha1_digest(id, id_str)) {
479 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
480 13b2bc37 2022-10-23 stsp "have-line with bad object ID");
484 13b2bc37 2022-10-23 stsp free(id_str);
485 13b2bc37 2022-10-23 stsp return err;
488 13b2bc37 2022-10-23 stsp static const struct got_error *
489 13b2bc37 2022-10-23 stsp send_capability(struct got_capability *capa, struct imsgbuf *ibuf)
491 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
492 13b2bc37 2022-10-23 stsp struct gotd_imsg_capability icapa;
493 13b2bc37 2022-10-23 stsp size_t len;
494 13b2bc37 2022-10-23 stsp struct ibuf *wbuf;
496 13b2bc37 2022-10-23 stsp memset(&icapa, 0, sizeof(icapa));
498 13b2bc37 2022-10-23 stsp icapa.key_len = strlen(capa->key);
499 13b2bc37 2022-10-23 stsp len = sizeof(icapa) + icapa.key_len;
500 13b2bc37 2022-10-23 stsp if (capa->value) {
501 13b2bc37 2022-10-23 stsp icapa.value_len = strlen(capa->value);
502 13b2bc37 2022-10-23 stsp len += icapa.value_len;
505 13b2bc37 2022-10-23 stsp wbuf = imsg_create(ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
506 13b2bc37 2022-10-23 stsp if (wbuf == NULL) {
507 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg_create CAPABILITY");
508 13b2bc37 2022-10-23 stsp return err;
511 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
512 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add CAPABILITY");
513 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
514 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add CAPABILITY");
515 13b2bc37 2022-10-23 stsp if (capa->value) {
516 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
517 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add CAPABILITY");
520 13b2bc37 2022-10-23 stsp wbuf->fd = -1;
521 13b2bc37 2022-10-23 stsp imsg_close(ibuf, wbuf);
523 13b2bc37 2022-10-23 stsp return NULL;
526 13b2bc37 2022-10-23 stsp static const struct got_error *
527 13b2bc37 2022-10-23 stsp send_capabilities(int *use_sidebands, int *report_status,
528 13b2bc37 2022-10-23 stsp char *capabilities_str, struct imsgbuf *ibuf)
530 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
531 13b2bc37 2022-10-23 stsp struct gotd_imsg_capabilities icapas;
532 13b2bc37 2022-10-23 stsp struct got_capability *capa = NULL;
533 13b2bc37 2022-10-23 stsp size_t ncapa, i;
535 13b2bc37 2022-10-23 stsp err = got_gitproto_split_capabilities_str(&capa, &ncapa,
536 13b2bc37 2022-10-23 stsp capabilities_str);
538 13b2bc37 2022-10-23 stsp return err;
540 13b2bc37 2022-10-23 stsp icapas.ncapabilities = ncapa;
541 13b2bc37 2022-10-23 stsp if (imsg_compose(ibuf, GOTD_IMSG_CAPABILITIES, 0, 0, -1,
542 13b2bc37 2022-10-23 stsp &icapas, sizeof(icapas)) == -1) {
543 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg_compose IMSG_CAPABILITIES");
547 13b2bc37 2022-10-23 stsp for (i = 0; i < ncapa; i++) {
548 13b2bc37 2022-10-23 stsp err = send_capability(&capa[i], ibuf);
551 13b2bc37 2022-10-23 stsp if (use_sidebands &&
552 13b2bc37 2022-10-23 stsp strcmp(capa[i].key, GOT_CAPA_SIDE_BAND_64K) == 0)
553 13b2bc37 2022-10-23 stsp *use_sidebands = 1;
554 13b2bc37 2022-10-23 stsp if (report_status &&
555 13b2bc37 2022-10-23 stsp strcmp(capa[i].key, GOT_CAPA_REPORT_STATUS) == 0)
556 13b2bc37 2022-10-23 stsp *report_status = 1;
559 13b2bc37 2022-10-23 stsp free(capa);
560 13b2bc37 2022-10-23 stsp return err;
563 13b2bc37 2022-10-23 stsp static const struct got_error *
564 13b2bc37 2022-10-23 stsp forward_flushpkt(struct imsgbuf *ibuf)
566 13b2bc37 2022-10-23 stsp if (imsg_compose(ibuf, GOTD_IMSG_FLUSH, 0, 0, -1, NULL, 0) == -1)
567 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_compose FLUSH");
569 13b2bc37 2022-10-23 stsp return gotd_imsg_flush(ibuf);
572 13b2bc37 2022-10-23 stsp static const struct got_error *
573 13b2bc37 2022-10-23 stsp recv_ack(struct imsg *imsg, uint8_t *expected_id)
575 13b2bc37 2022-10-23 stsp struct gotd_imsg_ack iack;
576 13b2bc37 2022-10-23 stsp size_t datalen;
578 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
579 13b2bc37 2022-10-23 stsp if (datalen != sizeof(iack))
580 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
582 13b2bc37 2022-10-23 stsp memcpy(&iack, imsg->data, sizeof(iack));
583 13b2bc37 2022-10-23 stsp if (memcmp(iack.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
584 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_OBJ_ID);
586 13b2bc37 2022-10-23 stsp return NULL;
589 13b2bc37 2022-10-23 stsp static const struct got_error *
590 13b2bc37 2022-10-23 stsp recv_nak(struct imsg *imsg, uint8_t *expected_id)
592 13b2bc37 2022-10-23 stsp struct gotd_imsg_ack inak;
593 13b2bc37 2022-10-23 stsp size_t datalen;
595 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
596 13b2bc37 2022-10-23 stsp if (datalen != sizeof(inak))
597 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
599 13b2bc37 2022-10-23 stsp memcpy(&inak, imsg->data, sizeof(inak));
600 13b2bc37 2022-10-23 stsp if (memcmp(inak.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
601 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_OBJ_ID);
603 13b2bc37 2022-10-23 stsp return NULL;
607 13b2bc37 2022-10-23 stsp static const struct got_error *
608 13b2bc37 2022-10-23 stsp recv_want(int *use_sidebands, int outfd, struct imsgbuf *ibuf,
609 13b2bc37 2022-10-23 stsp char *buf, size_t len, int expect_capabilities, int chattygot)
611 13b2bc37 2022-10-23 stsp const struct got_error *err;
612 13b2bc37 2022-10-23 stsp struct gotd_imsg_want iwant;
613 13b2bc37 2022-10-23 stsp char *capabilities_str;
614 13b2bc37 2022-10-23 stsp int done = 0;
615 13b2bc37 2022-10-23 stsp struct imsg imsg;
617 13b2bc37 2022-10-23 stsp memset(&iwant, 0, sizeof(iwant));
618 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
620 13b2bc37 2022-10-23 stsp err = parse_want_line(&capabilities_str, iwant.object_id, buf, len);
622 13b2bc37 2022-10-23 stsp return err;
624 13b2bc37 2022-10-23 stsp if (capabilities_str) {
625 13b2bc37 2022-10-23 stsp if (!expect_capabilities) {
626 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
627 13b2bc37 2022-10-23 stsp "unexpected capability announcement received");
630 13b2bc37 2022-10-23 stsp err = send_capabilities(use_sidebands, NULL, capabilities_str,
637 13b2bc37 2022-10-23 stsp if (imsg_compose(ibuf, GOTD_IMSG_WANT, 0, 0, -1,
638 13b2bc37 2022-10-23 stsp &iwant, sizeof(iwant)) == -1) {
639 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg_compose WANT");
643 13b2bc37 2022-10-23 stsp err = gotd_imsg_flush(ibuf);
648 13b2bc37 2022-10-23 stsp * Wait for an ACK, or an error in case the desired object
649 13b2bc37 2022-10-23 stsp * does not exist.
651 13b2bc37 2022-10-23 stsp while (!done && err == NULL) {
652 13b2bc37 2022-10-23 stsp err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
655 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
656 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
657 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(NULL, &imsg);
659 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ACK:
660 13b2bc37 2022-10-23 stsp err = recv_ack(&imsg, iwant.object_id);
666 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
670 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
673 13b2bc37 2022-10-23 stsp free(capabilities_str);
674 13b2bc37 2022-10-23 stsp return err;
677 13b2bc37 2022-10-23 stsp static const struct got_error *
678 13b2bc37 2022-10-23 stsp send_ack(int outfd, uint8_t *id, int chattygot)
680 13b2bc37 2022-10-23 stsp char hex[SHA1_DIGEST_STRING_LENGTH];
681 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
684 758dc042 2022-11-06 stsp if (got_sha1_digest_to_str(id, hex, sizeof(hex)) == NULL)
685 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_BAD_OBJ_ID);
687 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "ACK %s\n", hex);
688 13b2bc37 2022-10-23 stsp if (len >= sizeof(buf))
689 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_NO_SPACE);
691 13b2bc37 2022-10-23 stsp return got_pkt_writepkt(outfd, buf, len, chattygot);
694 13b2bc37 2022-10-23 stsp static const struct got_error *
695 13b2bc37 2022-10-23 stsp send_nak(int outfd, int chattygot)
697 13b2bc37 2022-10-23 stsp char buf[5];
700 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "NAK\n");
701 13b2bc37 2022-10-23 stsp if (len >= sizeof(buf))
702 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_NO_SPACE);
704 13b2bc37 2022-10-23 stsp return got_pkt_writepkt(outfd, buf, len, chattygot);
707 13b2bc37 2022-10-23 stsp static const struct got_error *
708 13b2bc37 2022-10-23 stsp recv_have(int *have_ack, int outfd, struct imsgbuf *ibuf, char *buf,
709 13b2bc37 2022-10-23 stsp size_t len, int chattygot)
711 13b2bc37 2022-10-23 stsp const struct got_error *err;
712 13b2bc37 2022-10-23 stsp struct gotd_imsg_have ihave;
713 13b2bc37 2022-10-23 stsp int done = 0;
714 13b2bc37 2022-10-23 stsp struct imsg imsg;
716 13b2bc37 2022-10-23 stsp memset(&ihave, 0, sizeof(ihave));
717 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
719 13b2bc37 2022-10-23 stsp err = parse_have_line(ihave.object_id, buf, len);
721 13b2bc37 2022-10-23 stsp return err;
723 13b2bc37 2022-10-23 stsp if (imsg_compose(ibuf, GOTD_IMSG_HAVE, 0, 0, -1,
724 13b2bc37 2022-10-23 stsp &ihave, sizeof(ihave)) == -1)
725 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_compose HAVE");
727 13b2bc37 2022-10-23 stsp err = gotd_imsg_flush(ibuf);
729 13b2bc37 2022-10-23 stsp return err;
732 13b2bc37 2022-10-23 stsp * Wait for an ACK or a NAK, indicating whether a common
733 13b2bc37 2022-10-23 stsp * commit object has been found.
735 13b2bc37 2022-10-23 stsp while (!done && err == NULL) {
736 13b2bc37 2022-10-23 stsp err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
738 13b2bc37 2022-10-23 stsp return err;
739 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
740 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
741 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(NULL, &imsg);
743 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ACK:
744 13b2bc37 2022-10-23 stsp err = recv_ack(&imsg, ihave.object_id);
747 13b2bc37 2022-10-23 stsp if (!*have_ack) {
748 13b2bc37 2022-10-23 stsp err = send_ack(outfd, ihave.object_id,
749 13b2bc37 2022-10-23 stsp chattygot);
751 13b2bc37 2022-10-23 stsp return err;
752 13b2bc37 2022-10-23 stsp *have_ack = 1;
756 13b2bc37 2022-10-23 stsp case GOTD_IMSG_NAK:
757 13b2bc37 2022-10-23 stsp err = recv_nak(&imsg, ihave.object_id);
763 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
767 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
770 13b2bc37 2022-10-23 stsp return err;
773 13b2bc37 2022-10-23 stsp static const struct got_error *
774 13b2bc37 2022-10-23 stsp recv_done(int *packfd, int outfd, struct imsgbuf *ibuf, int chattygot)
776 13b2bc37 2022-10-23 stsp const struct got_error *err;
777 13b2bc37 2022-10-23 stsp struct imsg imsg;
779 13b2bc37 2022-10-23 stsp *packfd = -1;
781 13b2bc37 2022-10-23 stsp if (imsg_compose(ibuf, GOTD_IMSG_DONE, 0, 0, -1, NULL, 0) == -1)
782 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_compose DONE");
784 13b2bc37 2022-10-23 stsp err = gotd_imsg_flush(ibuf);
786 13b2bc37 2022-10-23 stsp return err;
788 86769de8 2022-10-28 stsp while (*packfd == -1 && err == NULL) {
789 86769de8 2022-10-28 stsp err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
793 86769de8 2022-10-28 stsp switch (imsg.hdr.type) {
794 86769de8 2022-10-28 stsp case GOTD_IMSG_ERROR:
795 86769de8 2022-10-28 stsp err = gotd_imsg_recv_error(NULL, &imsg);
797 86769de8 2022-10-28 stsp case GOTD_IMSG_PACKFILE_PIPE:
798 86769de8 2022-10-28 stsp if (imsg.fd != -1)
799 86769de8 2022-10-28 stsp *packfd = imsg.fd;
801 86769de8 2022-10-28 stsp err = got_error(GOT_ERR_PRIVSEP_NO_FD);
804 86769de8 2022-10-28 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
808 86769de8 2022-10-28 stsp imsg_free(&imsg);
811 13b2bc37 2022-10-23 stsp return err;
814 13b2bc37 2022-10-23 stsp static const struct got_error *
815 13b2bc37 2022-10-23 stsp relay_progress_reports(struct imsgbuf *ibuf, int outfd, int chattygot)
817 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
818 13b2bc37 2022-10-23 stsp int pack_starting = 0;
819 13b2bc37 2022-10-23 stsp struct gotd_imsg_packfile_progress iprog;
820 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
821 13b2bc37 2022-10-23 stsp struct imsg imsg;
822 13b2bc37 2022-10-23 stsp size_t datalen;
823 13b2bc37 2022-10-23 stsp int p_deltify = 0, n;
824 13b2bc37 2022-10-23 stsp const char *eol = "\r";
826 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
828 13b2bc37 2022-10-23 stsp while (!pack_starting && err == NULL) {
829 13b2bc37 2022-10-23 stsp err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
833 13b2bc37 2022-10-23 stsp datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
834 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
835 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
836 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(NULL, &imsg);
838 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_READY:
839 13b2bc37 2022-10-23 stsp eol = "\n";
840 13b2bc37 2022-10-23 stsp pack_starting = 1;
841 13b2bc37 2022-10-23 stsp /* fallthrough */
842 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_PROGRESS:
843 13b2bc37 2022-10-23 stsp if (datalen != sizeof(iprog)) {
844 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_LEN);
847 13b2bc37 2022-10-23 stsp memcpy(&iprog, imsg.data, sizeof(iprog));
848 13b2bc37 2022-10-23 stsp if (iprog.nobj_total > 0) {
849 13b2bc37 2022-10-23 stsp p_deltify = (iprog.nobj_deltify * 100) /
850 13b2bc37 2022-10-23 stsp iprog.nobj_total;
852 13b2bc37 2022-10-23 stsp buf[0] = GOT_SIDEBAND_PROGRESS_INFO;
853 13b2bc37 2022-10-23 stsp n = snprintf(&buf[1], sizeof(buf) - 1,
854 13b2bc37 2022-10-23 stsp "%d commits colored, "
855 13b2bc37 2022-10-23 stsp "%d objects found, "
856 13b2bc37 2022-10-23 stsp "deltify %d%%%s",
857 758dc042 2022-11-06 stsp iprog.ncolored,
858 758dc042 2022-11-06 stsp iprog.nfound,
859 13b2bc37 2022-10-23 stsp p_deltify, eol);
860 13b2bc37 2022-10-23 stsp if (n >= sizeof(buf) - 1)
862 13b2bc37 2022-10-23 stsp err = got_pkt_writepkt(outfd, buf, 1 + n, chattygot);
865 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
869 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
872 13b2bc37 2022-10-23 stsp return err;
875 13b2bc37 2022-10-23 stsp static const struct got_error *
876 13b2bc37 2022-10-23 stsp serve_read(int infd, int outfd, int gotd_sock, const char *repo_path,
877 13b2bc37 2022-10-23 stsp int chattygot)
879 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
880 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
881 13b2bc37 2022-10-23 stsp struct imsgbuf ibuf;
882 13b2bc37 2022-10-23 stsp enum protostate {
883 13b2bc37 2022-10-23 stsp STATE_EXPECT_WANT,
884 13b2bc37 2022-10-23 stsp STATE_EXPECT_MORE_WANT,
885 13b2bc37 2022-10-23 stsp STATE_EXPECT_HAVE,
886 13b2bc37 2022-10-23 stsp STATE_EXPECT_DONE,
887 13b2bc37 2022-10-23 stsp STATE_DONE,
889 13b2bc37 2022-10-23 stsp enum protostate curstate = STATE_EXPECT_WANT;
890 13b2bc37 2022-10-23 stsp int have_ack = 0, use_sidebands = 0, seen_have = 0;
891 13b2bc37 2022-10-23 stsp int packfd = -1;
892 13b2bc37 2022-10-23 stsp size_t pack_chunksize;
894 13b2bc37 2022-10-23 stsp imsg_init(&ibuf, gotd_sock);
896 13b2bc37 2022-10-23 stsp err = announce_refs(outfd, &ibuf, 1, repo_path, chattygot);
900 13b2bc37 2022-10-23 stsp while (curstate != STATE_DONE) {
902 13b2bc37 2022-10-23 stsp buf[0] = '\0';
903 13b2bc37 2022-10-23 stsp err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot);
906 13b2bc37 2022-10-23 stsp if (n == 0) {
907 13b2bc37 2022-10-23 stsp if (curstate != STATE_EXPECT_MORE_WANT &&
908 13b2bc37 2022-10-23 stsp curstate != STATE_EXPECT_HAVE) {
909 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
910 13b2bc37 2022-10-23 stsp "unexpected flush packet received");
913 13b2bc37 2022-10-23 stsp err = forward_flushpkt(&ibuf);
916 13b2bc37 2022-10-23 stsp if (curstate == STATE_EXPECT_HAVE && !have_ack) {
917 13b2bc37 2022-10-23 stsp err = send_nak(outfd, chattygot);
921 13b2bc37 2022-10-23 stsp if (curstate == STATE_EXPECT_MORE_WANT)
922 13b2bc37 2022-10-23 stsp curstate = STATE_EXPECT_HAVE;
924 13b2bc37 2022-10-23 stsp curstate = STATE_EXPECT_DONE;
925 13b2bc37 2022-10-23 stsp } else if (n >= 5 && strncmp(buf, "want ", 5) == 0) {
926 13b2bc37 2022-10-23 stsp if (curstate != STATE_EXPECT_WANT &&
927 13b2bc37 2022-10-23 stsp curstate != STATE_EXPECT_MORE_WANT) {
928 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
929 13b2bc37 2022-10-23 stsp "unexpected 'want' packet");
932 13b2bc37 2022-10-23 stsp err = recv_want(&use_sidebands, outfd, &ibuf, buf, n,
933 13b2bc37 2022-10-23 stsp curstate == STATE_EXPECT_WANT ? 1 : 0, chattygot);
936 13b2bc37 2022-10-23 stsp if (curstate == STATE_EXPECT_WANT)
937 13b2bc37 2022-10-23 stsp curstate = STATE_EXPECT_MORE_WANT;
938 13b2bc37 2022-10-23 stsp } else if (n >= 5 && strncmp(buf, "have ", 5) == 0) {
939 13b2bc37 2022-10-23 stsp if (curstate != STATE_EXPECT_HAVE) {
940 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
941 13b2bc37 2022-10-23 stsp "unexpected 'have' packet");
944 13b2bc37 2022-10-23 stsp err = recv_have(&have_ack, outfd, &ibuf, buf, n,
945 13b2bc37 2022-10-23 stsp chattygot);
948 13b2bc37 2022-10-23 stsp seen_have = 1;
949 13b2bc37 2022-10-23 stsp } else if (n == 5 && strncmp(buf, "done\n", 5) == 0) {
950 13b2bc37 2022-10-23 stsp if (curstate != STATE_EXPECT_HAVE &&
951 13b2bc37 2022-10-23 stsp curstate != STATE_EXPECT_DONE) {
952 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
953 13b2bc37 2022-10-23 stsp "unexpected 'done' packet");
956 13b2bc37 2022-10-23 stsp err = recv_done(&packfd, outfd, &ibuf, chattygot);
959 13b2bc37 2022-10-23 stsp curstate = STATE_DONE;
962 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_BAD_PACKET);
967 13b2bc37 2022-10-23 stsp if (!seen_have) {
968 13b2bc37 2022-10-23 stsp err = send_nak(outfd, chattygot);
973 13b2bc37 2022-10-23 stsp if (use_sidebands) {
974 13b2bc37 2022-10-23 stsp err = relay_progress_reports(&ibuf, outfd, chattygot);
977 13b2bc37 2022-10-23 stsp pack_chunksize = GOT_SIDEBAND_64K_PACKFILE_DATA_MAX;
979 13b2bc37 2022-10-23 stsp pack_chunksize = sizeof(buf);
984 13b2bc37 2022-10-23 stsp r = read(packfd, use_sidebands ? &buf[1] : buf,
985 13b2bc37 2022-10-23 stsp pack_chunksize);
986 13b2bc37 2022-10-23 stsp if (r == -1) {
987 13b2bc37 2022-10-23 stsp err = got_error_from_errno("read");
989 13b2bc37 2022-10-23 stsp } else if (r == 0) {
990 13b2bc37 2022-10-23 stsp err = got_pkt_flushpkt(outfd, chattygot);
994 13b2bc37 2022-10-23 stsp if (use_sidebands) {
995 13b2bc37 2022-10-23 stsp buf[0] = GOT_SIDEBAND_PACKFILE_DATA;
996 13b2bc37 2022-10-23 stsp err = got_pkt_writepkt(outfd, buf, 1 + r, chattygot);
1000 1c9d898d 2022-10-31 stsp err = got_poll_write_full(outfd, buf, r);
1001 1c9d898d 2022-10-31 stsp if (err) {
1002 1c9d898d 2022-10-31 stsp if (err->code == GOT_ERR_EOF)
1003 1c9d898d 2022-10-31 stsp err = NULL;
1009 13b2bc37 2022-10-23 stsp imsg_clear(&ibuf);
1010 13b2bc37 2022-10-23 stsp if (packfd != -1 && close(packfd) == -1 && err == NULL)
1011 13b2bc37 2022-10-23 stsp err = got_error_from_errno("close");
1013 13b2bc37 2022-10-23 stsp echo_error(err, outfd, chattygot);
1014 13b2bc37 2022-10-23 stsp return err;
1017 13b2bc37 2022-10-23 stsp static const struct got_error *
1018 13b2bc37 2022-10-23 stsp parse_ref_update_line(char **common_capabilities, char **refname,
1019 13b2bc37 2022-10-23 stsp uint8_t *old_id, uint8_t *new_id, char *buf, size_t len)
1021 13b2bc37 2022-10-23 stsp const struct got_error *err;
1022 13b2bc37 2022-10-23 stsp char *old_id_str = NULL, *new_id_str = NULL;
1023 13b2bc37 2022-10-23 stsp char *client_capabilities = NULL;
1025 13b2bc37 2022-10-23 stsp *refname = NULL;
1027 13b2bc37 2022-10-23 stsp err = got_gitproto_parse_ref_update_line(&old_id_str, &new_id_str,
1028 13b2bc37 2022-10-23 stsp refname, &client_capabilities, buf, len);
1030 13b2bc37 2022-10-23 stsp return err;
1032 13b2bc37 2022-10-23 stsp if (!got_parse_sha1_digest(old_id, old_id_str) ||
1033 13b2bc37 2022-10-23 stsp !got_parse_sha1_digest(new_id, new_id_str)) {
1034 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
1035 13b2bc37 2022-10-23 stsp "ref-update with bad object ID");
1036 13b2bc37 2022-10-23 stsp goto done;
1038 13b2bc37 2022-10-23 stsp if (!got_ref_name_is_valid(*refname)) {
1039 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
1040 13b2bc37 2022-10-23 stsp "ref-update with bad reference name");
1041 13b2bc37 2022-10-23 stsp goto done;
1044 13b2bc37 2022-10-23 stsp if (client_capabilities) {
1045 13b2bc37 2022-10-23 stsp err = got_gitproto_match_capabilities(common_capabilities,
1046 13b2bc37 2022-10-23 stsp NULL, client_capabilities, write_capabilities,
1047 13b2bc37 2022-10-23 stsp nitems(write_capabilities));
1049 13b2bc37 2022-10-23 stsp goto done;
1052 13b2bc37 2022-10-23 stsp free(old_id_str);
1053 13b2bc37 2022-10-23 stsp free(new_id_str);
1054 13b2bc37 2022-10-23 stsp free(client_capabilities);
1055 13b2bc37 2022-10-23 stsp if (err) {
1056 13b2bc37 2022-10-23 stsp free(*refname);
1057 13b2bc37 2022-10-23 stsp *refname = NULL;
1059 13b2bc37 2022-10-23 stsp return err;
1062 13b2bc37 2022-10-23 stsp static const struct got_error *
1063 13b2bc37 2022-10-23 stsp recv_ref_update(int *report_status, int outfd, struct imsgbuf *ibuf,
1064 13b2bc37 2022-10-23 stsp char *buf, size_t len, int expect_capabilities, int chattygot)
1066 13b2bc37 2022-10-23 stsp const struct got_error *err;
1067 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update iref;
1068 13b2bc37 2022-10-23 stsp struct ibuf *wbuf;
1069 13b2bc37 2022-10-23 stsp char *capabilities_str = NULL, *refname = NULL;
1070 13b2bc37 2022-10-23 stsp int done = 0;
1071 13b2bc37 2022-10-23 stsp struct imsg imsg;
1073 13b2bc37 2022-10-23 stsp memset(&iref, 0, sizeof(iref));
1074 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
1076 13b2bc37 2022-10-23 stsp err = parse_ref_update_line(&capabilities_str, &refname,
1077 13b2bc37 2022-10-23 stsp iref.old_id, iref.new_id, buf, len);
1079 13b2bc37 2022-10-23 stsp return err;
1081 13b2bc37 2022-10-23 stsp if (capabilities_str) {
1082 13b2bc37 2022-10-23 stsp if (!expect_capabilities) {
1083 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
1084 13b2bc37 2022-10-23 stsp "unexpected capability announcement received");
1085 13b2bc37 2022-10-23 stsp goto done;
1087 13b2bc37 2022-10-23 stsp err = send_capabilities(NULL, report_status, capabilities_str,
1090 13b2bc37 2022-10-23 stsp goto done;
1093 13b2bc37 2022-10-23 stsp iref.name_len = strlen(refname);
1094 13b2bc37 2022-10-23 stsp len = sizeof(iref) + iref.name_len;
1095 13b2bc37 2022-10-23 stsp wbuf = imsg_create(ibuf, GOTD_IMSG_REF_UPDATE, 0, 0, len);
1096 13b2bc37 2022-10-23 stsp if (wbuf == NULL) {
1097 13b2bc37 2022-10-23 stsp err = got_error_from_errno("imsg_create REF_UPDATE");
1098 13b2bc37 2022-10-23 stsp goto done;
1101 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, &iref, sizeof(iref)) == -1)
1102 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add REF_UPDATE");
1103 13b2bc37 2022-10-23 stsp if (imsg_add(wbuf, refname, iref.name_len) == -1)
1104 13b2bc37 2022-10-23 stsp return got_error_from_errno("imsg_add REF_UPDATE");
1105 13b2bc37 2022-10-23 stsp wbuf->fd = -1;
1106 13b2bc37 2022-10-23 stsp imsg_close(ibuf, wbuf);
1108 13b2bc37 2022-10-23 stsp err = gotd_imsg_flush(ibuf);
1110 13b2bc37 2022-10-23 stsp goto done;
1112 13b2bc37 2022-10-23 stsp /* Wait for ACK or an error. */
1113 13b2bc37 2022-10-23 stsp while (!done && err == NULL) {
1114 13b2bc37 2022-10-23 stsp err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
1117 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
1118 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
1119 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(NULL, &imsg);
1121 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ACK:
1122 13b2bc37 2022-10-23 stsp err = recv_ack(&imsg, iref.new_id);
1128 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1132 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1135 13b2bc37 2022-10-23 stsp free(capabilities_str);
1136 13b2bc37 2022-10-23 stsp free(refname);
1137 13b2bc37 2022-10-23 stsp return err;
1140 13b2bc37 2022-10-23 stsp static const struct got_error *
1141 13b2bc37 2022-10-23 stsp recv_packfile(struct imsg *imsg, int infd)
1143 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1144 13b2bc37 2022-10-23 stsp size_t datalen;
1145 13b2bc37 2022-10-23 stsp int packfd;
1146 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
1147 13b2bc37 2022-10-23 stsp int pack_done = 0;
1149 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1150 13b2bc37 2022-10-23 stsp if (datalen != 0)
1151 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_MSG);
1153 13b2bc37 2022-10-23 stsp if (imsg->fd == -1)
1154 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_NO_FD);
1156 13b2bc37 2022-10-23 stsp packfd = imsg->fd;
1157 13b2bc37 2022-10-23 stsp while (!pack_done) {
1158 13b2bc37 2022-10-23 stsp ssize_t r = 0;
1160 13b2bc37 2022-10-23 stsp err = got_poll_fd(infd, POLLIN, 1);
1161 13b2bc37 2022-10-23 stsp if (err) {
1162 13b2bc37 2022-10-23 stsp if (err->code != GOT_ERR_TIMEOUT)
1164 13b2bc37 2022-10-23 stsp err = NULL;
1166 13b2bc37 2022-10-23 stsp r = read(infd, buf, sizeof(buf));
1167 13b2bc37 2022-10-23 stsp if (r == -1) {
1168 13b2bc37 2022-10-23 stsp err = got_error_from_errno("read");
1171 13b2bc37 2022-10-23 stsp if (r == 0) {
1173 13b2bc37 2022-10-23 stsp * Git clients hang up their side of the
1174 13b2bc37 2022-10-23 stsp * connection after sending the pack file.
1176 13b2bc37 2022-10-23 stsp err = NULL;
1177 13b2bc37 2022-10-23 stsp pack_done = 1;
1182 13b2bc37 2022-10-23 stsp if (r == 0) {
1183 13b2bc37 2022-10-23 stsp /* Detect gotd(8) closing the pack pipe when done. */
1184 13b2bc37 2022-10-23 stsp err = got_poll_fd(packfd, POLLOUT, 1);
1185 13b2bc37 2022-10-23 stsp if (err) {
1186 13b2bc37 2022-10-23 stsp if (err->code != GOT_ERR_EOF)
1188 13b2bc37 2022-10-23 stsp err = NULL;
1189 13b2bc37 2022-10-23 stsp pack_done = 1;
1192 13b2bc37 2022-10-23 stsp /* Write pack data and/or detect pipe being closed. */
1193 13b2bc37 2022-10-23 stsp err = got_poll_write_full(packfd, buf, r);
1194 13b2bc37 2022-10-23 stsp if (err) {
1195 13b2bc37 2022-10-23 stsp if (err->code == GOT_ERR_EOF)
1196 13b2bc37 2022-10-23 stsp err = NULL;
1202 13b2bc37 2022-10-23 stsp close(packfd);
1203 13b2bc37 2022-10-23 stsp return err;
1206 13b2bc37 2022-10-23 stsp static const struct got_error *
1207 13b2bc37 2022-10-23 stsp report_unpack_status(struct imsg *imsg, int outfd, int chattygot)
1209 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1210 13b2bc37 2022-10-23 stsp struct gotd_imsg_packfile_status istatus;
1211 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
1212 13b2bc37 2022-10-23 stsp size_t datalen, len;
1213 13b2bc37 2022-10-23 stsp char *reason = NULL;
1215 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1216 13b2bc37 2022-10-23 stsp if (datalen < sizeof(istatus))
1217 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1218 13b2bc37 2022-10-23 stsp memcpy(&istatus, imsg->data, sizeof(istatus));
1219 13b2bc37 2022-10-23 stsp if (datalen != sizeof(istatus) + istatus.reason_len)
1220 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1222 13b2bc37 2022-10-23 stsp reason = malloc(istatus.reason_len + 1);
1223 13b2bc37 2022-10-23 stsp if (reason == NULL) {
1224 13b2bc37 2022-10-23 stsp err = got_error_from_errno("malloc");
1225 13b2bc37 2022-10-23 stsp goto done;
1227 13b2bc37 2022-10-23 stsp memcpy(reason, imsg->data + sizeof(istatus), istatus.reason_len);
1228 13b2bc37 2022-10-23 stsp reason[istatus.reason_len] = '\0';
1230 13b2bc37 2022-10-23 stsp if (err == NULL)
1231 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "unpack ok\n");
1233 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "unpack %s\n", reason);
1234 13b2bc37 2022-10-23 stsp if (len >= sizeof(buf)) {
1235 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_NO_SPACE);
1236 13b2bc37 2022-10-23 stsp goto done;
1239 13b2bc37 2022-10-23 stsp err = got_pkt_writepkt(outfd, buf, len, chattygot);
1241 13b2bc37 2022-10-23 stsp free(reason);
1242 13b2bc37 2022-10-23 stsp return err;
1245 13b2bc37 2022-10-23 stsp static const struct got_error *
1246 13b2bc37 2022-10-23 stsp recv_ref_update_ok(struct imsg *imsg, int outfd, int chattygot)
1248 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1249 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update_ok iok;
1250 13b2bc37 2022-10-23 stsp size_t datalen, len;
1251 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
1252 13b2bc37 2022-10-23 stsp char *refname = NULL;
1254 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1255 13b2bc37 2022-10-23 stsp if (datalen < sizeof(iok))
1256 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1257 13b2bc37 2022-10-23 stsp memcpy(&iok, imsg->data, sizeof(iok));
1258 13b2bc37 2022-10-23 stsp if (datalen != sizeof(iok) + iok.name_len)
1259 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1261 13b2bc37 2022-10-23 stsp memcpy(&iok, imsg->data, sizeof(iok));
1263 13b2bc37 2022-10-23 stsp refname = malloc(iok.name_len + 1);
1264 13b2bc37 2022-10-23 stsp if (refname == NULL)
1265 13b2bc37 2022-10-23 stsp return got_error_from_errno("malloc");
1266 13b2bc37 2022-10-23 stsp memcpy(refname, imsg->data + sizeof(iok), iok.name_len);
1267 13b2bc37 2022-10-23 stsp refname[iok.name_len] = '\0';
1269 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "ok %s\n", refname);
1270 13b2bc37 2022-10-23 stsp if (len >= sizeof(buf)) {
1271 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_NO_SPACE);
1272 13b2bc37 2022-10-23 stsp goto done;
1275 13b2bc37 2022-10-23 stsp err = got_pkt_writepkt(outfd, buf, len, chattygot);
1277 13b2bc37 2022-10-23 stsp free(refname);
1278 13b2bc37 2022-10-23 stsp return err;
1281 13b2bc37 2022-10-23 stsp static const struct got_error *
1282 13b2bc37 2022-10-23 stsp recv_ref_update_ng(struct imsg *imsg, int outfd, int chattygot)
1284 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1285 13b2bc37 2022-10-23 stsp struct gotd_imsg_ref_update_ng ing;
1286 13b2bc37 2022-10-23 stsp size_t datalen, len;
1287 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
1288 13b2bc37 2022-10-23 stsp char *refname = NULL, *reason = NULL;
1290 13b2bc37 2022-10-23 stsp datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1291 13b2bc37 2022-10-23 stsp if (datalen < sizeof(ing))
1292 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1293 13b2bc37 2022-10-23 stsp memcpy(&ing, imsg->data, sizeof(ing));
1294 13b2bc37 2022-10-23 stsp if (datalen != sizeof(ing) + ing.name_len + ing.reason_len)
1295 13b2bc37 2022-10-23 stsp return got_error(GOT_ERR_PRIVSEP_LEN);
1297 13b2bc37 2022-10-23 stsp memcpy(&ing, imsg->data, sizeof(ing));
1299 13b2bc37 2022-10-23 stsp refname = malloc(ing.name_len + 1);
1300 13b2bc37 2022-10-23 stsp if (refname == NULL)
1301 13b2bc37 2022-10-23 stsp return got_error_from_errno("malloc");
1302 13b2bc37 2022-10-23 stsp memcpy(refname, imsg->data + sizeof(ing), ing.name_len);
1303 13b2bc37 2022-10-23 stsp refname[ing.name_len] = '\0';
1305 13b2bc37 2022-10-23 stsp reason = malloc(ing.reason_len + 1);
1306 13b2bc37 2022-10-23 stsp if (reason == NULL) {
1307 13b2bc37 2022-10-23 stsp err = got_error_from_errno("malloc");
1308 13b2bc37 2022-10-23 stsp goto done;
1310 13b2bc37 2022-10-23 stsp memcpy(refname, imsg->data + sizeof(ing) + ing.name_len,
1311 13b2bc37 2022-10-23 stsp ing.reason_len);
1312 13b2bc37 2022-10-23 stsp refname[ing.reason_len] = '\0';
1314 13b2bc37 2022-10-23 stsp len = snprintf(buf, sizeof(buf), "ng %s %s\n", refname, reason);
1315 13b2bc37 2022-10-23 stsp if (len >= sizeof(buf)) {
1316 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_NO_SPACE);
1317 13b2bc37 2022-10-23 stsp goto done;
1320 13b2bc37 2022-10-23 stsp err = got_pkt_writepkt(outfd, buf, len, chattygot);
1322 13b2bc37 2022-10-23 stsp free(refname);
1323 13b2bc37 2022-10-23 stsp free(reason);
1324 13b2bc37 2022-10-23 stsp return err;
1327 13b2bc37 2022-10-23 stsp static const struct got_error *
1328 13b2bc37 2022-10-23 stsp serve_write(int infd, int outfd, int gotd_sock, const char *repo_path,
1329 13b2bc37 2022-10-23 stsp int chattygot)
1331 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1332 13b2bc37 2022-10-23 stsp char buf[GOT_PKT_MAX];
1333 13b2bc37 2022-10-23 stsp struct imsgbuf ibuf;
1334 13b2bc37 2022-10-23 stsp enum protostate {
1335 13b2bc37 2022-10-23 stsp STATE_EXPECT_REF_UPDATE,
1336 13b2bc37 2022-10-23 stsp STATE_EXPECT_MORE_REF_UPDATES,
1337 13b2bc37 2022-10-23 stsp STATE_EXPECT_PACKFILE,
1338 13b2bc37 2022-10-23 stsp STATE_PACKFILE_RECEIVED,
1339 13b2bc37 2022-10-23 stsp STATE_REFS_UPDATED,
1341 13b2bc37 2022-10-23 stsp enum protostate curstate = STATE_EXPECT_REF_UPDATE;
1342 13b2bc37 2022-10-23 stsp struct imsg imsg;
1343 13b2bc37 2022-10-23 stsp int report_status = 0;
1345 13b2bc37 2022-10-23 stsp imsg_init(&ibuf, gotd_sock);
1346 13b2bc37 2022-10-23 stsp memset(&imsg, 0, sizeof(imsg));
1348 13b2bc37 2022-10-23 stsp err = announce_refs(outfd, &ibuf, 0, repo_path, chattygot);
1350 13b2bc37 2022-10-23 stsp goto done;
1352 13b2bc37 2022-10-23 stsp while (curstate != STATE_EXPECT_PACKFILE) {
1354 13b2bc37 2022-10-23 stsp buf[0] = '\0';
1355 13b2bc37 2022-10-23 stsp err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot);
1358 13b2bc37 2022-10-23 stsp if (n == 0) {
1359 13b2bc37 2022-10-23 stsp if (curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1360 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
1361 13b2bc37 2022-10-23 stsp "unexpected flush packet received");
1362 13b2bc37 2022-10-23 stsp goto done;
1364 13b2bc37 2022-10-23 stsp err = forward_flushpkt(&ibuf);
1366 13b2bc37 2022-10-23 stsp goto done;
1367 13b2bc37 2022-10-23 stsp curstate = STATE_EXPECT_PACKFILE;
1368 13b2bc37 2022-10-23 stsp } else if (n >= (SHA1_DIGEST_STRING_LENGTH * 2) + 2) {
1369 13b2bc37 2022-10-23 stsp if (curstate != STATE_EXPECT_REF_UPDATE &&
1370 13b2bc37 2022-10-23 stsp curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1371 13b2bc37 2022-10-23 stsp err = got_error_msg(GOT_ERR_BAD_PACKET,
1372 13b2bc37 2022-10-23 stsp "unexpected ref-update packet");
1373 13b2bc37 2022-10-23 stsp goto done;
1375 13b2bc37 2022-10-23 stsp if (curstate == STATE_EXPECT_REF_UPDATE) {
1376 13b2bc37 2022-10-23 stsp err = recv_ref_update(&report_status,
1377 13b2bc37 2022-10-23 stsp outfd, &ibuf, buf, n, 1, chattygot);
1379 13b2bc37 2022-10-23 stsp err = recv_ref_update(NULL, outfd, &ibuf,
1380 13b2bc37 2022-10-23 stsp buf, n, 0, chattygot);
1383 13b2bc37 2022-10-23 stsp goto done;
1384 13b2bc37 2022-10-23 stsp curstate = STATE_EXPECT_MORE_REF_UPDATES;
1386 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_BAD_PACKET);
1387 13b2bc37 2022-10-23 stsp goto done;
1391 13b2bc37 2022-10-23 stsp while (curstate != STATE_PACKFILE_RECEIVED) {
1392 13b2bc37 2022-10-23 stsp err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1394 13b2bc37 2022-10-23 stsp goto done;
1395 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
1396 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
1397 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(NULL, &imsg);
1398 13b2bc37 2022-10-23 stsp goto done;
1399 7fec5f4a 2022-10-28 stsp case GOTD_IMSG_PACKFILE_PIPE:
1400 13b2bc37 2022-10-23 stsp err = recv_packfile(&imsg, infd);
1401 13b2bc37 2022-10-23 stsp if (err) {
1402 13b2bc37 2022-10-23 stsp if (err->code != GOT_ERR_EOF)
1403 13b2bc37 2022-10-23 stsp goto done;
1405 13b2bc37 2022-10-23 stsp * EOF is reported when the client hangs up,
1406 13b2bc37 2022-10-23 stsp * which can happen with Git clients.
1407 13b2bc37 2022-10-23 stsp * The socket should stay half-open so we
1408 13b2bc37 2022-10-23 stsp * can still send our reports if requested.
1410 13b2bc37 2022-10-23 stsp err = NULL;
1412 13b2bc37 2022-10-23 stsp curstate = STATE_PACKFILE_RECEIVED;
1415 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1419 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1421 13b2bc37 2022-10-23 stsp goto done;
1424 13b2bc37 2022-10-23 stsp while (curstate != STATE_REFS_UPDATED && err == NULL) {
1425 13b2bc37 2022-10-23 stsp err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1428 13b2bc37 2022-10-23 stsp switch (imsg.hdr.type) {
1429 13b2bc37 2022-10-23 stsp case GOTD_IMSG_ERROR:
1430 13b2bc37 2022-10-23 stsp err = gotd_imsg_recv_error(NULL, &imsg);
1432 13b2bc37 2022-10-23 stsp case GOTD_IMSG_PACKFILE_STATUS:
1433 13b2bc37 2022-10-23 stsp if (!report_status)
1435 13b2bc37 2022-10-23 stsp err = report_unpack_status(&imsg, outfd, chattygot);
1437 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATE_OK:
1438 13b2bc37 2022-10-23 stsp if (!report_status)
1440 13b2bc37 2022-10-23 stsp err = recv_ref_update_ok(&imsg, outfd, chattygot);
1442 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REF_UPDATE_NG:
1443 13b2bc37 2022-10-23 stsp if (!report_status)
1445 13b2bc37 2022-10-23 stsp err = recv_ref_update_ng(&imsg, outfd, chattygot);
1447 13b2bc37 2022-10-23 stsp case GOTD_IMSG_REFS_UPDATED:
1448 13b2bc37 2022-10-23 stsp curstate = STATE_REFS_UPDATED;
1449 13b2bc37 2022-10-23 stsp err = got_pkt_flushpkt(outfd, chattygot);
1452 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_PRIVSEP_MSG);
1456 13b2bc37 2022-10-23 stsp imsg_free(&imsg);
1459 13b2bc37 2022-10-23 stsp imsg_clear(&ibuf);
1461 13b2bc37 2022-10-23 stsp echo_error(err, outfd, chattygot);
1462 13b2bc37 2022-10-23 stsp return err;
1465 13b2bc37 2022-10-23 stsp const struct got_error *
1466 13b2bc37 2022-10-23 stsp got_serve(int infd, int outfd, const char *gitcmd, int gotd_sock, int chattygot)
1468 13b2bc37 2022-10-23 stsp const struct got_error *err = NULL;
1469 13b2bc37 2022-10-23 stsp char *command = NULL, *repo_path = NULL;
1471 13b2bc37 2022-10-23 stsp err = parse_command(&command, &repo_path, gitcmd);
1473 13b2bc37 2022-10-23 stsp return err;
1475 13b2bc37 2022-10-23 stsp if (strcmp(command, GOT_SERVE_CMD_FETCH) == 0)
1476 13b2bc37 2022-10-23 stsp err = serve_read(infd, outfd, gotd_sock, repo_path, chattygot);
1477 13b2bc37 2022-10-23 stsp else if (strcmp(command, GOT_SERVE_CMD_SEND) == 0)
1478 13b2bc37 2022-10-23 stsp err = serve_write(infd, outfd, gotd_sock, repo_path, chattygot);
1480 13b2bc37 2022-10-23 stsp err = got_error(GOT_ERR_BAD_PACKET);
1482 13b2bc37 2022-10-23 stsp free(command);
1483 13b2bc37 2022-10-23 stsp free(repo_path);
1484 13b2bc37 2022-10-23 stsp return err;
