2 3efd8e31 2022-10-23 thomas * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 3efd8e31 2022-10-23 thomas * Permission to use, copy, modify, and distribute this software for any
5 3efd8e31 2022-10-23 thomas * purpose with or without fee is hereby granted, provided that the above
6 3efd8e31 2022-10-23 thomas * copyright notice and this permission notice appear in all copies.
8 3efd8e31 2022-10-23 thomas * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 3efd8e31 2022-10-23 thomas * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 3efd8e31 2022-10-23 thomas * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 3efd8e31 2022-10-23 thomas * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 3efd8e31 2022-10-23 thomas * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 3efd8e31 2022-10-23 thomas * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 3efd8e31 2022-10-23 thomas * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 3efd8e31 2022-10-23 thomas #include <sys/types.h>
18 3efd8e31 2022-10-23 thomas #include <sys/queue.h>
19 3efd8e31 2022-10-23 thomas #include <sys/uio.h>
21 3efd8e31 2022-10-23 thomas #include <errno.h>
22 3efd8e31 2022-10-23 thomas #include <event.h>
23 3efd8e31 2022-10-23 thomas #include <poll.h>
24 3efd8e31 2022-10-23 thomas #include <limits.h>
25 3efd8e31 2022-10-23 thomas #include <sha1.h>
26 3efd8e31 2022-10-23 thomas #include <stdio.h>
27 3efd8e31 2022-10-23 thomas #include <stdint.h>
28 3efd8e31 2022-10-23 thomas #include <stdlib.h>
29 3efd8e31 2022-10-23 thomas #include <string.h>
30 3efd8e31 2022-10-23 thomas #include <imsg.h>
31 3efd8e31 2022-10-23 thomas #include <unistd.h>
33 3efd8e31 2022-10-23 thomas #include "got_error.h"
34 3efd8e31 2022-10-23 thomas #include "got_serve.h"
35 3efd8e31 2022-10-23 thomas #include "got_path.h"
36 3efd8e31 2022-10-23 thomas #include "got_version.h"
37 3efd8e31 2022-10-23 thomas #include "got_reference.h"
39 3efd8e31 2022-10-23 thomas #include "got_lib_pkt.h"
40 3efd8e31 2022-10-23 thomas #include "got_lib_dial.h"
41 3efd8e31 2022-10-23 thomas #include "got_lib_gitproto.h"
42 3efd8e31 2022-10-23 thomas #include "got_lib_sha1.h"
43 3efd8e31 2022-10-23 thomas #include "got_lib_poll.h"
45 3efd8e31 2022-10-23 thomas #include "gotd.h"
47 3efd8e31 2022-10-23 thomas #ifndef nitems
48 3efd8e31 2022-10-23 thomas #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
51 3efd8e31 2022-10-23 thomas static const struct got_capability read_capabilities[] = {
52 3efd8e31 2022-10-23 thomas { GOT_CAPA_AGENT, "got/" GOT_VERSION_STR },
53 3efd8e31 2022-10-23 thomas { GOT_CAPA_OFS_DELTA, NULL },
54 3efd8e31 2022-10-23 thomas { GOT_CAPA_SIDE_BAND_64K, NULL },
57 3efd8e31 2022-10-23 thomas static const struct got_capability write_capabilities[] = {
58 3efd8e31 2022-10-23 thomas { GOT_CAPA_AGENT, "got/" GOT_VERSION_STR },
59 3efd8e31 2022-10-23 thomas { GOT_CAPA_OFS_DELTA, NULL },
60 3efd8e31 2022-10-23 thomas { GOT_CAPA_REPORT_STATUS, NULL },
61 3efd8e31 2022-10-23 thomas { GOT_CAPA_NO_THIN, NULL },
63 3efd8e31 2022-10-23 thomas { GOT_CAPA_DELETE_REFS, NULL },
67 3efd8e31 2022-10-23 thomas static const struct got_error *
68 3efd8e31 2022-10-23 thomas parse_command(char **command, char **repo_path, const char *gitcmd)
70 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
71 3efd8e31 2022-10-23 thomas size_t len, cmdlen, pathlen;
72 3efd8e31 2022-10-23 thomas char *path0 = NULL, *path, *abspath = NULL, *canonpath = NULL;
73 3efd8e31 2022-10-23 thomas const char *relpath;
75 3efd8e31 2022-10-23 thomas *command = NULL;
76 3efd8e31 2022-10-23 thomas *repo_path = NULL;
78 3efd8e31 2022-10-23 thomas len = strlen(gitcmd);
80 3efd8e31 2022-10-23 thomas if (len >= strlen(GOT_SERVE_CMD_SEND) &&
81 3efd8e31 2022-10-23 thomas strncmp(gitcmd, GOT_SERVE_CMD_SEND,
82 3efd8e31 2022-10-23 thomas strlen(GOT_SERVE_CMD_SEND)) == 0)
83 3efd8e31 2022-10-23 thomas cmdlen = strlen(GOT_SERVE_CMD_SEND);
84 3efd8e31 2022-10-23 thomas else if (len >= strlen(GOT_SERVE_CMD_FETCH) &&
85 3efd8e31 2022-10-23 thomas strncmp(gitcmd, GOT_SERVE_CMD_FETCH,
86 3efd8e31 2022-10-23 thomas strlen(GOT_SERVE_CMD_FETCH)) == 0)
87 3efd8e31 2022-10-23 thomas cmdlen = strlen(GOT_SERVE_CMD_FETCH);
89 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_PACKET);
91 3efd8e31 2022-10-23 thomas if (len <= cmdlen + 1 || gitcmd[cmdlen] != ' ')
92 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_PACKET);
94 3efd8e31 2022-10-23 thomas if (memchr(&gitcmd[cmdlen + 1], '\0', len - cmdlen) == NULL)
95 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_PATH);
97 3efd8e31 2022-10-23 thomas /* Forbid linefeeds in paths, like Git does. */
98 3efd8e31 2022-10-23 thomas if (memchr(&gitcmd[cmdlen + 1], '\n', len - cmdlen) != NULL)
99 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_PATH);
101 3efd8e31 2022-10-23 thomas path0 = strdup(&gitcmd[cmdlen + 1]);
102 3efd8e31 2022-10-23 thomas if (path0 == NULL)
103 3efd8e31 2022-10-23 thomas return got_error_from_errno("strdup");
104 3efd8e31 2022-10-23 thomas path = path0;
105 3efd8e31 2022-10-23 thomas pathlen = strlen(path);
108 3efd8e31 2022-10-23 thomas * Git clients send a shell command.
109 3efd8e31 2022-10-23 thomas * Trim spaces and quotes around the path.
111 3efd8e31 2022-10-23 thomas while (path[0] == '\'' || path[0] == '\"' || path[0] == ' ') {
113 3efd8e31 2022-10-23 thomas pathlen--;
115 3efd8e31 2022-10-23 thomas while (pathlen > 0 &&
116 3efd8e31 2022-10-23 thomas (path[pathlen - 1] == '\'' || path[pathlen - 1] == '\"' ||
117 3efd8e31 2022-10-23 thomas path[pathlen - 1] == ' ')) {
118 3efd8e31 2022-10-23 thomas path[pathlen - 1] = '\0';
119 3efd8e31 2022-10-23 thomas pathlen--;
122 3efd8e31 2022-10-23 thomas /* Deny an empty repository path. */
123 3efd8e31 2022-10-23 thomas if (path[0] == '\0' || got_path_is_root_dir(path)) {
124 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_NOT_GIT_REPO);
125 3efd8e31 2022-10-23 thomas goto done;
128 3efd8e31 2022-10-23 thomas if (asprintf(&abspath, "/%s", path) == -1) {
129 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
130 3efd8e31 2022-10-23 thomas goto done;
132 3efd8e31 2022-10-23 thomas pathlen = strlen(abspath);
133 3efd8e31 2022-10-23 thomas canonpath = malloc(pathlen);
134 3efd8e31 2022-10-23 thomas if (canonpath == NULL) {
135 3efd8e31 2022-10-23 thomas err = got_error_from_errno("malloc");
136 3efd8e31 2022-10-23 thomas goto done;
138 3efd8e31 2022-10-23 thomas err = got_canonpath(abspath, canonpath, pathlen);
140 3efd8e31 2022-10-23 thomas goto done;
142 3efd8e31 2022-10-23 thomas relpath = canonpath;
143 3efd8e31 2022-10-23 thomas while (relpath[0] == '/')
144 3efd8e31 2022-10-23 thomas relpath++;
145 3efd8e31 2022-10-23 thomas *repo_path = strdup(relpath);
146 3efd8e31 2022-10-23 thomas if (*repo_path == NULL) {
147 3efd8e31 2022-10-23 thomas err = got_error_from_errno("strdup");
148 3efd8e31 2022-10-23 thomas goto done;
150 3efd8e31 2022-10-23 thomas *command = strndup(gitcmd, cmdlen);
151 3efd8e31 2022-10-23 thomas if (*command == NULL)
152 3efd8e31 2022-10-23 thomas err = got_error_from_errno("strndup");
154 3efd8e31 2022-10-23 thomas free(path0);
155 3efd8e31 2022-10-23 thomas free(abspath);
156 3efd8e31 2022-10-23 thomas free(canonpath);
157 3efd8e31 2022-10-23 thomas if (err) {
158 3efd8e31 2022-10-23 thomas free(*repo_path);
159 3efd8e31 2022-10-23 thomas *repo_path = NULL;
161 3efd8e31 2022-10-23 thomas return err;
164 3efd8e31 2022-10-23 thomas static const struct got_error *
165 3efd8e31 2022-10-23 thomas append_read_capabilities(size_t *capalen, size_t len, const char *symrefstr,
166 3efd8e31 2022-10-23 thomas uint8_t *buf, size_t bufsize)
168 3efd8e31 2022-10-23 thomas struct got_capability capa[nitems(read_capabilities) + 1];
169 3efd8e31 2022-10-23 thomas size_t ncapa;
171 3efd8e31 2022-10-23 thomas memcpy(&capa, read_capabilities, sizeof(read_capabilities));
172 3efd8e31 2022-10-23 thomas if (symrefstr) {
173 3efd8e31 2022-10-23 thomas capa[nitems(read_capabilities)].key = "symref";
174 3efd8e31 2022-10-23 thomas capa[nitems(read_capabilities)].value = symrefstr;
175 3efd8e31 2022-10-23 thomas ncapa = nitems(capa);
177 3efd8e31 2022-10-23 thomas ncapa = nitems(read_capabilities);
179 3efd8e31 2022-10-23 thomas return got_gitproto_append_capabilities(capalen, buf, len,
180 3efd8e31 2022-10-23 thomas bufsize, capa, ncapa);
183 3efd8e31 2022-10-23 thomas static const struct got_error *
184 3efd8e31 2022-10-23 thomas send_ref(int outfd, uint8_t *id, const char *refname, int send_capabilities,
185 3efd8e31 2022-10-23 thomas int client_is_reading, const char *symrefstr, int chattygot)
187 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
188 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
189 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
190 3efd8e31 2022-10-23 thomas size_t len, capalen = 0;
192 946e0798 2022-11-06 thomas if (got_sha1_digest_to_str(id, hex, sizeof(hex)) == NULL)
193 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
195 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "%s %s", hex, refname);
196 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf))
197 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
199 3efd8e31 2022-10-23 thomas if (send_capabilities) {
200 3efd8e31 2022-10-23 thomas if (client_is_reading) {
201 3efd8e31 2022-10-23 thomas err = append_read_capabilities(&capalen, len,
202 3efd8e31 2022-10-23 thomas symrefstr, buf, sizeof(buf));
204 3efd8e31 2022-10-23 thomas err = got_gitproto_append_capabilities(&capalen,
205 3efd8e31 2022-10-23 thomas buf, len, sizeof(buf), write_capabilities,
206 3efd8e31 2022-10-23 thomas nitems(write_capabilities));
209 3efd8e31 2022-10-23 thomas return err;
210 3efd8e31 2022-10-23 thomas len += capalen;
213 3efd8e31 2022-10-23 thomas if (len + 1 >= sizeof(buf))
214 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
215 3efd8e31 2022-10-23 thomas buf[len] = '\n';
217 3efd8e31 2022-10-23 thomas buf[len] = '\0';
219 3efd8e31 2022-10-23 thomas return got_pkt_writepkt(outfd, buf, len, chattygot);
222 3efd8e31 2022-10-23 thomas static const struct got_error *
223 2a0fb198 2022-11-08 thomas send_zero_refs(int outfd, int client_is_reading, int chattygot)
225 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
226 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
227 3efd8e31 2022-10-23 thomas uint8_t zero[SHA1_DIGEST_LENGTH];
228 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
229 3efd8e31 2022-10-23 thomas size_t len, capalen = 0;
231 3efd8e31 2022-10-23 thomas memset(&zero, 0, sizeof(zero));
233 946e0798 2022-11-06 thomas if (got_sha1_digest_to_str(zero, hex, sizeof(hex)) == NULL)
234 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
236 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "%s capabilities^{}", hex);
237 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf))
238 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
240 2a0fb198 2022-11-08 thomas if (client_is_reading) {
241 2a0fb198 2022-11-08 thomas err = got_gitproto_append_capabilities(&capalen, buf, len,
242 2a0fb198 2022-11-08 thomas sizeof(buf), read_capabilities, nitems(read_capabilities));
244 2a0fb198 2022-11-08 thomas return err;
246 2a0fb198 2022-11-08 thomas err = got_gitproto_append_capabilities(&capalen, buf, len,
247 2a0fb198 2022-11-08 thomas sizeof(buf), write_capabilities,
248 2a0fb198 2022-11-08 thomas nitems(write_capabilities));
250 2a0fb198 2022-11-08 thomas return err;
253 ea1f0585 2022-11-07 thomas return got_pkt_writepkt(outfd, buf, len + capalen, chattygot);
256 3efd8e31 2022-10-23 thomas static void
257 3efd8e31 2022-10-23 thomas echo_error(const struct got_error *err, int outfd, int chattygot)
259 3efd8e31 2022-10-23 thomas char buf[4 + GOT_ERR_MAX_MSG_SIZE];
260 3efd8e31 2022-10-23 thomas size_t len;
263 3efd8e31 2022-10-23 thomas * Echo the error to the client on a pkt-line.
264 3efd8e31 2022-10-23 thomas * The client should then terminate its session.
266 3efd8e31 2022-10-23 thomas buf[0] = 'E'; buf[1] = 'R'; buf[2] = 'R'; buf[3] = ' '; buf[4] = '\0';
267 3efd8e31 2022-10-23 thomas len = strlcat(buf, err->msg, sizeof(buf));
268 911f5cd5 2022-12-08 thomas got_pkt_writepkt(outfd, buf, len, chattygot);
271 3efd8e31 2022-10-23 thomas static const struct got_error *
272 3efd8e31 2022-10-23 thomas announce_refs(int outfd, struct imsgbuf *ibuf, int client_is_reading,
273 3efd8e31 2022-10-23 thomas const char *repo_path, int chattygot)
275 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
276 3efd8e31 2022-10-23 thomas struct imsg imsg;
277 3efd8e31 2022-10-23 thomas size_t datalen;
278 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs lsref;
279 3efd8e31 2022-10-23 thomas struct gotd_imsg_reflist ireflist;
280 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref iref;
281 3efd8e31 2022-10-23 thomas struct gotd_imsg_symref isymref;
282 3efd8e31 2022-10-23 thomas size_t nrefs = 0;
283 3efd8e31 2022-10-23 thomas int have_nrefs = 0, sent_capabilities = 0;
284 3efd8e31 2022-10-23 thomas char *symrefname = NULL, *symreftarget = NULL, *symrefstr = NULL;
285 3efd8e31 2022-10-23 thomas char *refname = NULL;
287 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
288 3efd8e31 2022-10-23 thomas memset(&lsref, 0, sizeof(lsref));
290 3efd8e31 2022-10-23 thomas if (strlcpy(lsref.repo_name, repo_path, sizeof(lsref.repo_name)) >=
291 3efd8e31 2022-10-23 thomas sizeof(lsref.repo_name))
292 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
293 3efd8e31 2022-10-23 thomas lsref.client_is_reading = client_is_reading;
295 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_LIST_REFS, 0, 0, -1,
296 3efd8e31 2022-10-23 thomas &lsref, sizeof(lsref)) == -1)
297 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose LIST_REFS");
299 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
301 3efd8e31 2022-10-23 thomas return err;
303 3efd8e31 2022-10-23 thomas while (!have_nrefs || nrefs > 0) {
304 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
306 3efd8e31 2022-10-23 thomas goto done;
307 3efd8e31 2022-10-23 thomas datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
308 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
309 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
310 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
311 3efd8e31 2022-10-23 thomas goto done;
312 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REFLIST:
313 3efd8e31 2022-10-23 thomas if (have_nrefs || nrefs > 0) {
314 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
315 3efd8e31 2022-10-23 thomas goto done;
317 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireflist)) {
318 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
319 3efd8e31 2022-10-23 thomas goto done;
321 3efd8e31 2022-10-23 thomas memcpy(&ireflist, imsg.data, sizeof(ireflist));
322 3efd8e31 2022-10-23 thomas nrefs = ireflist.nrefs;
323 3efd8e31 2022-10-23 thomas have_nrefs = 1;
324 3efd8e31 2022-10-23 thomas if (nrefs == 0)
325 2a0fb198 2022-11-08 thomas err = send_zero_refs(outfd, client_is_reading,
326 2a0fb198 2022-11-08 thomas chattygot);
328 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF:
329 3efd8e31 2022-10-23 thomas if (!have_nrefs || nrefs == 0) {
330 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
331 3efd8e31 2022-10-23 thomas goto done;
333 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref)) {
334 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
335 3efd8e31 2022-10-23 thomas goto done;
337 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg.data, sizeof(iref));
338 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iref) + iref.name_len) {
339 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
340 3efd8e31 2022-10-23 thomas goto done;
342 fcbb06bf 2023-01-14 thomas refname = strndup(imsg.data + sizeof(iref),
343 fcbb06bf 2023-01-14 thomas iref.name_len);
344 3efd8e31 2022-10-23 thomas if (refname == NULL) {
345 fcbb06bf 2023-01-14 thomas err = got_error_from_errno("strndup");
346 3efd8e31 2022-10-23 thomas goto done;
348 3efd8e31 2022-10-23 thomas err = send_ref(outfd, iref.id, refname,
349 3efd8e31 2022-10-23 thomas !sent_capabilities, client_is_reading,
350 3efd8e31 2022-10-23 thomas NULL, chattygot);
351 3efd8e31 2022-10-23 thomas free(refname);
352 3efd8e31 2022-10-23 thomas refname = NULL;
354 3efd8e31 2022-10-23 thomas goto done;
355 3efd8e31 2022-10-23 thomas sent_capabilities = 1;
356 3efd8e31 2022-10-23 thomas if (nrefs > 0)
359 3efd8e31 2022-10-23 thomas case GOTD_IMSG_SYMREF:
360 3efd8e31 2022-10-23 thomas if (!have_nrefs || nrefs == 0) {
361 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
362 3efd8e31 2022-10-23 thomas goto done;
364 3efd8e31 2022-10-23 thomas if (datalen < sizeof(isymref)) {
365 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
366 3efd8e31 2022-10-23 thomas goto done;
368 3efd8e31 2022-10-23 thomas memcpy(&isymref, imsg.data, sizeof(isymref));
369 3efd8e31 2022-10-23 thomas if (datalen != sizeof(isymref) + isymref.name_len +
370 3efd8e31 2022-10-23 thomas isymref.target_len) {
371 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
372 3efd8e31 2022-10-23 thomas goto done;
376 3efd8e31 2022-10-23 thomas * For now, we only announce one symbolic ref,
377 3efd8e31 2022-10-23 thomas * as part of our capability advertisement.
379 3efd8e31 2022-10-23 thomas if (sent_capabilities || symrefstr != NULL ||
380 3efd8e31 2022-10-23 thomas symrefname != NULL || symreftarget != NULL)
383 fcbb06bf 2023-01-14 thomas symrefname = strndup(imsg.data + sizeof(isymref),
384 fcbb06bf 2023-01-14 thomas isymref.name_len);
385 3efd8e31 2022-10-23 thomas if (symrefname == NULL) {
386 3efd8e31 2022-10-23 thomas err = got_error_from_errno("malloc");
387 3efd8e31 2022-10-23 thomas goto done;
390 fcbb06bf 2023-01-14 thomas symreftarget = strndup(
391 fcbb06bf 2023-01-14 thomas imsg.data + sizeof(isymref) + isymref.name_len,
392 fcbb06bf 2023-01-14 thomas isymref.target_len);
393 3efd8e31 2022-10-23 thomas if (symreftarget == NULL) {
394 fcbb06bf 2023-01-14 thomas err = got_error_from_errno("strndup");
395 3efd8e31 2022-10-23 thomas goto done;
398 3efd8e31 2022-10-23 thomas if (asprintf(&symrefstr, "%s:%s", symrefname,
399 3efd8e31 2022-10-23 thomas symreftarget) == -1) {
400 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
401 3efd8e31 2022-10-23 thomas goto done;
403 3efd8e31 2022-10-23 thomas err = send_ref(outfd, isymref.target_id, symrefname,
404 3efd8e31 2022-10-23 thomas !sent_capabilities, client_is_reading, symrefstr,
405 3efd8e31 2022-10-23 thomas chattygot);
406 3efd8e31 2022-10-23 thomas free(refname);
407 3efd8e31 2022-10-23 thomas refname = NULL;
409 3efd8e31 2022-10-23 thomas goto done;
410 3efd8e31 2022-10-23 thomas sent_capabilities = 1;
411 3efd8e31 2022-10-23 thomas if (nrefs > 0)
415 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
419 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
422 3efd8e31 2022-10-23 thomas err = got_pkt_flushpkt(outfd, chattygot);
424 3efd8e31 2022-10-23 thomas goto done;
426 3efd8e31 2022-10-23 thomas free(symrefstr);
427 3efd8e31 2022-10-23 thomas free(symrefname);
428 3efd8e31 2022-10-23 thomas free(symreftarget);
429 3efd8e31 2022-10-23 thomas return err;
432 3efd8e31 2022-10-23 thomas static const struct got_error *
433 3efd8e31 2022-10-23 thomas parse_want_line(char **common_capabilities, uint8_t *id, char *buf, size_t len)
435 3efd8e31 2022-10-23 thomas const struct got_error *err;
436 3efd8e31 2022-10-23 thomas char *id_str = NULL, *client_capabilities = NULL;
438 3efd8e31 2022-10-23 thomas err = got_gitproto_parse_want_line(&id_str,
439 3efd8e31 2022-10-23 thomas &client_capabilities, buf, len);
441 3efd8e31 2022-10-23 thomas return err;
443 3efd8e31 2022-10-23 thomas if (!got_parse_sha1_digest(id, id_str)) {
444 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
445 3efd8e31 2022-10-23 thomas "want-line with bad object ID");
446 3efd8e31 2022-10-23 thomas goto done;
449 3efd8e31 2022-10-23 thomas if (client_capabilities) {
450 3efd8e31 2022-10-23 thomas err = got_gitproto_match_capabilities(common_capabilities,
451 3efd8e31 2022-10-23 thomas NULL, client_capabilities, read_capabilities,
452 3efd8e31 2022-10-23 thomas nitems(read_capabilities));
454 3efd8e31 2022-10-23 thomas goto done;
457 3efd8e31 2022-10-23 thomas free(id_str);
458 3efd8e31 2022-10-23 thomas free(client_capabilities);
459 3efd8e31 2022-10-23 thomas return err;
462 3efd8e31 2022-10-23 thomas static const struct got_error *
463 3efd8e31 2022-10-23 thomas parse_have_line(uint8_t *id, char *buf, size_t len)
465 3efd8e31 2022-10-23 thomas const struct got_error *err;
466 3efd8e31 2022-10-23 thomas char *id_str = NULL;
468 3efd8e31 2022-10-23 thomas err = got_gitproto_parse_have_line(&id_str, buf, len);
470 3efd8e31 2022-10-23 thomas return err;
472 3efd8e31 2022-10-23 thomas if (!got_parse_sha1_digest(id, id_str)) {
473 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
474 3efd8e31 2022-10-23 thomas "have-line with bad object ID");
475 3efd8e31 2022-10-23 thomas goto done;
478 3efd8e31 2022-10-23 thomas free(id_str);
479 3efd8e31 2022-10-23 thomas return err;
482 3efd8e31 2022-10-23 thomas static const struct got_error *
483 3efd8e31 2022-10-23 thomas send_capability(struct got_capability *capa, struct imsgbuf *ibuf)
485 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
486 3efd8e31 2022-10-23 thomas struct gotd_imsg_capability icapa;
487 3efd8e31 2022-10-23 thomas size_t len;
488 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
490 3efd8e31 2022-10-23 thomas memset(&icapa, 0, sizeof(icapa));
492 3efd8e31 2022-10-23 thomas icapa.key_len = strlen(capa->key);
493 3efd8e31 2022-10-23 thomas len = sizeof(icapa) + icapa.key_len;
494 3efd8e31 2022-10-23 thomas if (capa->value) {
495 3efd8e31 2022-10-23 thomas icapa.value_len = strlen(capa->value);
496 3efd8e31 2022-10-23 thomas len += icapa.value_len;
499 3efd8e31 2022-10-23 thomas wbuf = imsg_create(ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
500 3efd8e31 2022-10-23 thomas if (wbuf == NULL) {
501 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_create CAPABILITY");
502 3efd8e31 2022-10-23 thomas return err;
505 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
506 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add CAPABILITY");
507 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
508 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add CAPABILITY");
509 3efd8e31 2022-10-23 thomas if (capa->value) {
510 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
511 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add CAPABILITY");
514 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
515 3efd8e31 2022-10-23 thomas imsg_close(ibuf, wbuf);
517 3efd8e31 2022-10-23 thomas return NULL;
520 3efd8e31 2022-10-23 thomas static const struct got_error *
521 3efd8e31 2022-10-23 thomas send_capabilities(int *use_sidebands, int *report_status,
522 3efd8e31 2022-10-23 thomas char *capabilities_str, struct imsgbuf *ibuf)
524 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
525 3efd8e31 2022-10-23 thomas struct gotd_imsg_capabilities icapas;
526 3efd8e31 2022-10-23 thomas struct got_capability *capa = NULL;
527 3efd8e31 2022-10-23 thomas size_t ncapa, i;
529 3efd8e31 2022-10-23 thomas err = got_gitproto_split_capabilities_str(&capa, &ncapa,
530 3efd8e31 2022-10-23 thomas capabilities_str);
532 3efd8e31 2022-10-23 thomas return err;
534 3efd8e31 2022-10-23 thomas icapas.ncapabilities = ncapa;
535 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_CAPABILITIES, 0, 0, -1,
536 3efd8e31 2022-10-23 thomas &icapas, sizeof(icapas)) == -1) {
537 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_compose IMSG_CAPABILITIES");
538 3efd8e31 2022-10-23 thomas goto done;
541 3efd8e31 2022-10-23 thomas for (i = 0; i < ncapa; i++) {
542 3efd8e31 2022-10-23 thomas err = send_capability(&capa[i], ibuf);
544 3efd8e31 2022-10-23 thomas goto done;
545 3efd8e31 2022-10-23 thomas if (use_sidebands &&
546 3efd8e31 2022-10-23 thomas strcmp(capa[i].key, GOT_CAPA_SIDE_BAND_64K) == 0)
547 3efd8e31 2022-10-23 thomas *use_sidebands = 1;
548 3efd8e31 2022-10-23 thomas if (report_status &&
549 3efd8e31 2022-10-23 thomas strcmp(capa[i].key, GOT_CAPA_REPORT_STATUS) == 0)
550 3efd8e31 2022-10-23 thomas *report_status = 1;
553 3efd8e31 2022-10-23 thomas free(capa);
554 3efd8e31 2022-10-23 thomas return err;
557 3efd8e31 2022-10-23 thomas static const struct got_error *
558 3efd8e31 2022-10-23 thomas forward_flushpkt(struct imsgbuf *ibuf)
560 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_FLUSH, 0, 0, -1, NULL, 0) == -1)
561 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose FLUSH");
563 3efd8e31 2022-10-23 thomas return gotd_imsg_flush(ibuf);
566 3efd8e31 2022-10-23 thomas static const struct got_error *
567 3efd8e31 2022-10-23 thomas recv_ack(struct imsg *imsg, uint8_t *expected_id)
569 3efd8e31 2022-10-23 thomas struct gotd_imsg_ack iack;
570 3efd8e31 2022-10-23 thomas size_t datalen;
572 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
573 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iack))
574 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
576 3efd8e31 2022-10-23 thomas memcpy(&iack, imsg->data, sizeof(iack));
577 3efd8e31 2022-10-23 thomas if (memcmp(iack.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
578 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
580 3efd8e31 2022-10-23 thomas return NULL;
583 3efd8e31 2022-10-23 thomas static const struct got_error *
584 3efd8e31 2022-10-23 thomas recv_nak(struct imsg *imsg, uint8_t *expected_id)
586 3efd8e31 2022-10-23 thomas struct gotd_imsg_ack inak;
587 3efd8e31 2022-10-23 thomas size_t datalen;
589 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
590 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inak))
591 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
593 3efd8e31 2022-10-23 thomas memcpy(&inak, imsg->data, sizeof(inak));
594 3efd8e31 2022-10-23 thomas if (memcmp(inak.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
595 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
597 3efd8e31 2022-10-23 thomas return NULL;
601 3efd8e31 2022-10-23 thomas static const struct got_error *
602 3efd8e31 2022-10-23 thomas recv_want(int *use_sidebands, int outfd, struct imsgbuf *ibuf,
603 3efd8e31 2022-10-23 thomas char *buf, size_t len, int expect_capabilities, int chattygot)
605 3efd8e31 2022-10-23 thomas const struct got_error *err;
606 3efd8e31 2022-10-23 thomas struct gotd_imsg_want iwant;
607 3efd8e31 2022-10-23 thomas char *capabilities_str;
608 3efd8e31 2022-10-23 thomas int done = 0;
609 3efd8e31 2022-10-23 thomas struct imsg imsg;
611 3efd8e31 2022-10-23 thomas memset(&iwant, 0, sizeof(iwant));
612 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
614 3efd8e31 2022-10-23 thomas err = parse_want_line(&capabilities_str, iwant.object_id, buf, len);
616 3efd8e31 2022-10-23 thomas return err;
618 3efd8e31 2022-10-23 thomas if (capabilities_str) {
619 3efd8e31 2022-10-23 thomas if (!expect_capabilities) {
620 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
621 3efd8e31 2022-10-23 thomas "unexpected capability announcement received");
622 3efd8e31 2022-10-23 thomas goto done;
624 3efd8e31 2022-10-23 thomas err = send_capabilities(use_sidebands, NULL, capabilities_str,
627 3efd8e31 2022-10-23 thomas goto done;
631 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_WANT, 0, 0, -1,
632 3efd8e31 2022-10-23 thomas &iwant, sizeof(iwant)) == -1) {
633 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_compose WANT");
634 3efd8e31 2022-10-23 thomas goto done;
637 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
639 3efd8e31 2022-10-23 thomas goto done;
642 3efd8e31 2022-10-23 thomas * Wait for an ACK, or an error in case the desired object
643 3efd8e31 2022-10-23 thomas * does not exist.
645 3efd8e31 2022-10-23 thomas while (!done && err == NULL) {
646 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
649 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
650 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
651 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
653 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ACK:
654 3efd8e31 2022-10-23 thomas err = recv_ack(&imsg, iwant.object_id);
657 3efd8e31 2022-10-23 thomas done = 1;
660 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
664 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
667 3efd8e31 2022-10-23 thomas free(capabilities_str);
668 3efd8e31 2022-10-23 thomas return err;
671 3efd8e31 2022-10-23 thomas static const struct got_error *
672 3efd8e31 2022-10-23 thomas send_ack(int outfd, uint8_t *id, int chattygot)
674 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
675 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
678 946e0798 2022-11-06 thomas if (got_sha1_digest_to_str(id, hex, sizeof(hex)) == NULL)
679 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
681 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "ACK %s\n", hex);
682 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf))
683 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
685 3efd8e31 2022-10-23 thomas return got_pkt_writepkt(outfd, buf, len, chattygot);
688 3efd8e31 2022-10-23 thomas static const struct got_error *
689 3efd8e31 2022-10-23 thomas send_nak(int outfd, int chattygot)
691 3efd8e31 2022-10-23 thomas char buf[5];
694 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "NAK\n");
695 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf))
696 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
698 3efd8e31 2022-10-23 thomas return got_pkt_writepkt(outfd, buf, len, chattygot);
701 3efd8e31 2022-10-23 thomas static const struct got_error *
702 3efd8e31 2022-10-23 thomas recv_have(int *have_ack, int outfd, struct imsgbuf *ibuf, char *buf,
703 3efd8e31 2022-10-23 thomas size_t len, int chattygot)
705 3efd8e31 2022-10-23 thomas const struct got_error *err;
706 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ihave;
707 3efd8e31 2022-10-23 thomas int done = 0;
708 3efd8e31 2022-10-23 thomas struct imsg imsg;
710 3efd8e31 2022-10-23 thomas memset(&ihave, 0, sizeof(ihave));
711 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
713 3efd8e31 2022-10-23 thomas err = parse_have_line(ihave.object_id, buf, len);
715 3efd8e31 2022-10-23 thomas return err;
717 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_HAVE, 0, 0, -1,
718 3efd8e31 2022-10-23 thomas &ihave, sizeof(ihave)) == -1)
719 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose HAVE");
721 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
723 3efd8e31 2022-10-23 thomas return err;
726 3efd8e31 2022-10-23 thomas * Wait for an ACK or a NAK, indicating whether a common
727 3efd8e31 2022-10-23 thomas * commit object has been found.
729 3efd8e31 2022-10-23 thomas while (!done && err == NULL) {
730 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
732 3efd8e31 2022-10-23 thomas return err;
733 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
734 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
735 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
737 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ACK:
738 3efd8e31 2022-10-23 thomas err = recv_ack(&imsg, ihave.object_id);
741 3efd8e31 2022-10-23 thomas if (!*have_ack) {
742 3efd8e31 2022-10-23 thomas err = send_ack(outfd, ihave.object_id,
743 3efd8e31 2022-10-23 thomas chattygot);
745 3efd8e31 2022-10-23 thomas return err;
746 3efd8e31 2022-10-23 thomas *have_ack = 1;
748 3efd8e31 2022-10-23 thomas done = 1;
750 3efd8e31 2022-10-23 thomas case GOTD_IMSG_NAK:
751 3efd8e31 2022-10-23 thomas err = recv_nak(&imsg, ihave.object_id);
754 3efd8e31 2022-10-23 thomas done = 1;
757 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
761 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
764 3efd8e31 2022-10-23 thomas return err;
767 3efd8e31 2022-10-23 thomas static const struct got_error *
768 3efd8e31 2022-10-23 thomas recv_done(int *packfd, int outfd, struct imsgbuf *ibuf, int chattygot)
770 3efd8e31 2022-10-23 thomas const struct got_error *err;
771 3efd8e31 2022-10-23 thomas struct imsg imsg;
773 3efd8e31 2022-10-23 thomas *packfd = -1;
775 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_DONE, 0, 0, -1, NULL, 0) == -1)
776 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose DONE");
778 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
780 3efd8e31 2022-10-23 thomas return err;
782 cc4cc677 2022-10-28 thomas while (*packfd == -1 && err == NULL) {
783 cc4cc677 2022-10-28 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
787 cc4cc677 2022-10-28 thomas switch (imsg.hdr.type) {
788 cc4cc677 2022-10-28 thomas case GOTD_IMSG_ERROR:
789 cc4cc677 2022-10-28 thomas err = gotd_imsg_recv_error(NULL, &imsg);
791 cc4cc677 2022-10-28 thomas case GOTD_IMSG_PACKFILE_PIPE:
792 cc4cc677 2022-10-28 thomas if (imsg.fd != -1)
793 cc4cc677 2022-10-28 thomas *packfd = imsg.fd;
795 cc4cc677 2022-10-28 thomas err = got_error(GOT_ERR_PRIVSEP_NO_FD);
798 cc4cc677 2022-10-28 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
802 cc4cc677 2022-10-28 thomas imsg_free(&imsg);
805 3efd8e31 2022-10-23 thomas return err;
808 3efd8e31 2022-10-23 thomas static const struct got_error *
809 3efd8e31 2022-10-23 thomas relay_progress_reports(struct imsgbuf *ibuf, int outfd, int chattygot)
811 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
812 3efd8e31 2022-10-23 thomas int pack_starting = 0;
813 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_progress iprog;
814 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
815 3efd8e31 2022-10-23 thomas struct imsg imsg;
816 3efd8e31 2022-10-23 thomas size_t datalen;
817 3efd8e31 2022-10-23 thomas int p_deltify = 0, n;
818 3efd8e31 2022-10-23 thomas const char *eol = "\r";
820 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
822 3efd8e31 2022-10-23 thomas while (!pack_starting && err == NULL) {
823 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
827 3efd8e31 2022-10-23 thomas datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
828 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
829 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
830 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
832 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_READY:
833 3efd8e31 2022-10-23 thomas eol = "\n";
834 3efd8e31 2022-10-23 thomas pack_starting = 1;
835 3efd8e31 2022-10-23 thomas /* fallthrough */
836 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_PROGRESS:
837 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iprog)) {
838 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
841 3efd8e31 2022-10-23 thomas memcpy(&iprog, imsg.data, sizeof(iprog));
842 3efd8e31 2022-10-23 thomas if (iprog.nobj_total > 0) {
843 3efd8e31 2022-10-23 thomas p_deltify = (iprog.nobj_deltify * 100) /
844 3efd8e31 2022-10-23 thomas iprog.nobj_total;
846 3efd8e31 2022-10-23 thomas buf[0] = GOT_SIDEBAND_PROGRESS_INFO;
847 3efd8e31 2022-10-23 thomas n = snprintf(&buf[1], sizeof(buf) - 1,
848 3efd8e31 2022-10-23 thomas "%d commits colored, "
849 3efd8e31 2022-10-23 thomas "%d objects found, "
850 3efd8e31 2022-10-23 thomas "deltify %d%%%s",
851 946e0798 2022-11-06 thomas iprog.ncolored,
852 946e0798 2022-11-06 thomas iprog.nfound,
853 3efd8e31 2022-10-23 thomas p_deltify, eol);
854 3efd8e31 2022-10-23 thomas if (n >= sizeof(buf) - 1)
856 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, 1 + n, chattygot);
859 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
863 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
866 3efd8e31 2022-10-23 thomas return err;
869 3efd8e31 2022-10-23 thomas static const struct got_error *
870 3efd8e31 2022-10-23 thomas serve_read(int infd, int outfd, int gotd_sock, const char *repo_path,
871 3efd8e31 2022-10-23 thomas int chattygot)
873 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
874 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
875 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
876 3efd8e31 2022-10-23 thomas enum protostate {
877 3efd8e31 2022-10-23 thomas STATE_EXPECT_WANT,
878 3efd8e31 2022-10-23 thomas STATE_EXPECT_MORE_WANT,
879 3efd8e31 2022-10-23 thomas STATE_EXPECT_HAVE,
880 3efd8e31 2022-10-23 thomas STATE_EXPECT_DONE,
881 3efd8e31 2022-10-23 thomas STATE_DONE,
883 3efd8e31 2022-10-23 thomas enum protostate curstate = STATE_EXPECT_WANT;
884 3efd8e31 2022-10-23 thomas int have_ack = 0, use_sidebands = 0, seen_have = 0;
885 3efd8e31 2022-10-23 thomas int packfd = -1;
886 3efd8e31 2022-10-23 thomas size_t pack_chunksize;
888 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, gotd_sock);
890 3efd8e31 2022-10-23 thomas err = announce_refs(outfd, &ibuf, 1, repo_path, chattygot);
892 3efd8e31 2022-10-23 thomas goto done;
894 3efd8e31 2022-10-23 thomas while (curstate != STATE_DONE) {
896 3efd8e31 2022-10-23 thomas buf[0] = '\0';
897 3efd8e31 2022-10-23 thomas err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot);
899 113392cf 2023-01-23 thomas goto done;
900 3efd8e31 2022-10-23 thomas if (n == 0) {
901 895484c8 2023-01-19 thomas if (curstate != STATE_EXPECT_WANT &&
902 895484c8 2023-01-19 thomas curstate != STATE_EXPECT_MORE_WANT &&
903 6110f5ef 2023-01-19 thomas curstate != STATE_EXPECT_HAVE &&
904 6110f5ef 2023-01-19 thomas curstate != STATE_EXPECT_DONE) {
905 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
906 3efd8e31 2022-10-23 thomas "unexpected flush packet received");
907 3efd8e31 2022-10-23 thomas goto done;
910 895484c8 2023-01-19 thomas if (curstate == STATE_EXPECT_WANT) {
911 895484c8 2023-01-19 thomas ssize_t r;
913 895484c8 2023-01-19 thomas * If the client does not want to fetch
914 895484c8 2023-01-19 thomas * anything we should receive a flush
915 895484c8 2023-01-19 thomas * packet followed by EOF.
917 895484c8 2023-01-19 thomas r = read(infd, buf, sizeof(buf));
918 895484c8 2023-01-19 thomas if (r == -1) {
919 895484c8 2023-01-19 thomas err = got_error_from_errno("read");
920 895484c8 2023-01-19 thomas goto done;
922 895484c8 2023-01-19 thomas if (r == 0) /* EOF */
923 895484c8 2023-01-19 thomas goto done;
925 895484c8 2023-01-19 thomas /* Zero-length field followed by payload. */
926 895484c8 2023-01-19 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
927 895484c8 2023-01-19 thomas "unexpected flush packet received");
928 895484c8 2023-01-19 thomas goto done;
931 94a71055 2023-01-23 thomas if (curstate == STATE_EXPECT_WANT ||
932 94a71055 2023-01-23 thomas curstate == STATE_EXPECT_MORE_WANT ||
933 94a71055 2023-01-23 thomas curstate == STATE_EXPECT_HAVE) {
934 94a71055 2023-01-23 thomas err = forward_flushpkt(&ibuf);
936 94a71055 2023-01-23 thomas goto done;
938 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_HAVE && !have_ack) {
939 3efd8e31 2022-10-23 thomas err = send_nak(outfd, chattygot);
941 3efd8e31 2022-10-23 thomas goto done;
943 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_MORE_WANT)
944 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_HAVE;
946 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_DONE;
947 3efd8e31 2022-10-23 thomas } else if (n >= 5 && strncmp(buf, "want ", 5) == 0) {
948 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_WANT &&
949 3efd8e31 2022-10-23 thomas curstate != STATE_EXPECT_MORE_WANT) {
950 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
951 3efd8e31 2022-10-23 thomas "unexpected 'want' packet");
952 3efd8e31 2022-10-23 thomas goto done;
954 3efd8e31 2022-10-23 thomas err = recv_want(&use_sidebands, outfd, &ibuf, buf, n,
955 3efd8e31 2022-10-23 thomas curstate == STATE_EXPECT_WANT ? 1 : 0, chattygot);
957 3efd8e31 2022-10-23 thomas goto done;
958 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_WANT)
959 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_MORE_WANT;
960 3efd8e31 2022-10-23 thomas } else if (n >= 5 && strncmp(buf, "have ", 5) == 0) {
961 6110f5ef 2023-01-19 thomas if (curstate != STATE_EXPECT_HAVE &&
962 6110f5ef 2023-01-19 thomas curstate != STATE_EXPECT_DONE) {
963 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
964 3efd8e31 2022-10-23 thomas "unexpected 'have' packet");
965 3efd8e31 2022-10-23 thomas goto done;
967 6110f5ef 2023-01-19 thomas if (curstate == STATE_EXPECT_HAVE) {
968 6110f5ef 2023-01-19 thomas err = recv_have(&have_ack, outfd, &ibuf,
969 6110f5ef 2023-01-19 thomas buf, n, chattygot);
971 6110f5ef 2023-01-19 thomas goto done;
972 6110f5ef 2023-01-19 thomas seen_have = 1;
973 6110f5ef 2023-01-19 thomas if (have_ack)
974 6110f5ef 2023-01-19 thomas curstate = STATE_EXPECT_DONE;
976 3efd8e31 2022-10-23 thomas } else if (n == 5 && strncmp(buf, "done\n", 5) == 0) {
977 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_HAVE &&
978 3efd8e31 2022-10-23 thomas curstate != STATE_EXPECT_DONE) {
979 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
980 3efd8e31 2022-10-23 thomas "unexpected 'done' packet");
981 3efd8e31 2022-10-23 thomas goto done;
983 3efd8e31 2022-10-23 thomas err = recv_done(&packfd, outfd, &ibuf, chattygot);
985 3efd8e31 2022-10-23 thomas goto done;
986 3efd8e31 2022-10-23 thomas curstate = STATE_DONE;
989 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_BAD_PACKET);
990 3efd8e31 2022-10-23 thomas goto done;
994 3efd8e31 2022-10-23 thomas if (!seen_have) {
995 3efd8e31 2022-10-23 thomas err = send_nak(outfd, chattygot);
997 3efd8e31 2022-10-23 thomas goto done;
1000 3efd8e31 2022-10-23 thomas if (use_sidebands) {
1001 3efd8e31 2022-10-23 thomas err = relay_progress_reports(&ibuf, outfd, chattygot);
1002 3efd8e31 2022-10-23 thomas if (err)
1003 3efd8e31 2022-10-23 thomas goto done;
1004 3efd8e31 2022-10-23 thomas pack_chunksize = GOT_SIDEBAND_64K_PACKFILE_DATA_MAX;
1006 3efd8e31 2022-10-23 thomas pack_chunksize = sizeof(buf);
1008 3efd8e31 2022-10-23 thomas for (;;) {
1009 89077ea1 2022-10-31 thomas ssize_t r;
1011 3efd8e31 2022-10-23 thomas r = read(packfd, use_sidebands ? &buf[1] : buf,
1012 3efd8e31 2022-10-23 thomas pack_chunksize);
1013 3efd8e31 2022-10-23 thomas if (r == -1) {
1014 3efd8e31 2022-10-23 thomas err = got_error_from_errno("read");
1016 3efd8e31 2022-10-23 thomas } else if (r == 0) {
1017 3efd8e31 2022-10-23 thomas err = got_pkt_flushpkt(outfd, chattygot);
1021 3efd8e31 2022-10-23 thomas if (use_sidebands) {
1022 3efd8e31 2022-10-23 thomas buf[0] = GOT_SIDEBAND_PACKFILE_DATA;
1023 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, 1 + r, chattygot);
1024 3efd8e31 2022-10-23 thomas if (err)
1026 3efd8e31 2022-10-23 thomas } else {
1027 89077ea1 2022-10-31 thomas err = got_poll_write_full(outfd, buf, r);
1028 89077ea1 2022-10-31 thomas if (err) {
1029 89077ea1 2022-10-31 thomas if (err->code == GOT_ERR_EOF)
1030 89077ea1 2022-10-31 thomas err = NULL;
1036 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
1037 3efd8e31 2022-10-23 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
1038 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
1039 3efd8e31 2022-10-23 thomas if (err)
1040 3efd8e31 2022-10-23 thomas echo_error(err, outfd, chattygot);
1041 3efd8e31 2022-10-23 thomas return err;
1044 3efd8e31 2022-10-23 thomas static const struct got_error *
1045 3efd8e31 2022-10-23 thomas parse_ref_update_line(char **common_capabilities, char **refname,
1046 3efd8e31 2022-10-23 thomas uint8_t *old_id, uint8_t *new_id, char *buf, size_t len)
1048 3efd8e31 2022-10-23 thomas const struct got_error *err;
1049 3efd8e31 2022-10-23 thomas char *old_id_str = NULL, *new_id_str = NULL;
1050 3efd8e31 2022-10-23 thomas char *client_capabilities = NULL;
1052 3efd8e31 2022-10-23 thomas *refname = NULL;
1054 3efd8e31 2022-10-23 thomas err = got_gitproto_parse_ref_update_line(&old_id_str, &new_id_str,
1055 3efd8e31 2022-10-23 thomas refname, &client_capabilities, buf, len);
1056 3efd8e31 2022-10-23 thomas if (err)
1057 3efd8e31 2022-10-23 thomas return err;
1059 3efd8e31 2022-10-23 thomas if (!got_parse_sha1_digest(old_id, old_id_str) ||
1060 3efd8e31 2022-10-23 thomas !got_parse_sha1_digest(new_id, new_id_str)) {
1061 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1062 3efd8e31 2022-10-23 thomas "ref-update with bad object ID");
1063 3efd8e31 2022-10-23 thomas goto done;
1065 3efd8e31 2022-10-23 thomas if (!got_ref_name_is_valid(*refname)) {
1066 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1067 3efd8e31 2022-10-23 thomas "ref-update with bad reference name");
1068 3efd8e31 2022-10-23 thomas goto done;
1071 3efd8e31 2022-10-23 thomas if (client_capabilities) {
1072 3efd8e31 2022-10-23 thomas err = got_gitproto_match_capabilities(common_capabilities,
1073 3efd8e31 2022-10-23 thomas NULL, client_capabilities, write_capabilities,
1074 3efd8e31 2022-10-23 thomas nitems(write_capabilities));
1075 3efd8e31 2022-10-23 thomas if (err)
1076 3efd8e31 2022-10-23 thomas goto done;
1079 3efd8e31 2022-10-23 thomas free(old_id_str);
1080 3efd8e31 2022-10-23 thomas free(new_id_str);
1081 3efd8e31 2022-10-23 thomas free(client_capabilities);
1082 3efd8e31 2022-10-23 thomas if (err) {
1083 3efd8e31 2022-10-23 thomas free(*refname);
1084 3efd8e31 2022-10-23 thomas *refname = NULL;
1086 3efd8e31 2022-10-23 thomas return err;
1089 3efd8e31 2022-10-23 thomas static const struct got_error *
1090 3efd8e31 2022-10-23 thomas recv_ref_update(int *report_status, int outfd, struct imsgbuf *ibuf,
1091 3efd8e31 2022-10-23 thomas char *buf, size_t len, int expect_capabilities, int chattygot)
1093 3efd8e31 2022-10-23 thomas const struct got_error *err;
1094 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1095 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1096 3efd8e31 2022-10-23 thomas char *capabilities_str = NULL, *refname = NULL;
1097 3efd8e31 2022-10-23 thomas int done = 0;
1098 3efd8e31 2022-10-23 thomas struct imsg imsg;
1100 3efd8e31 2022-10-23 thomas memset(&iref, 0, sizeof(iref));
1101 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
1103 3efd8e31 2022-10-23 thomas err = parse_ref_update_line(&capabilities_str, &refname,
1104 3efd8e31 2022-10-23 thomas iref.old_id, iref.new_id, buf, len);
1105 3efd8e31 2022-10-23 thomas if (err)
1106 3efd8e31 2022-10-23 thomas return err;
1108 3efd8e31 2022-10-23 thomas if (capabilities_str) {
1109 3efd8e31 2022-10-23 thomas if (!expect_capabilities) {
1110 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1111 3efd8e31 2022-10-23 thomas "unexpected capability announcement received");
1112 3efd8e31 2022-10-23 thomas goto done;
1114 3efd8e31 2022-10-23 thomas err = send_capabilities(NULL, report_status, capabilities_str,
1116 3efd8e31 2022-10-23 thomas if (err)
1117 3efd8e31 2022-10-23 thomas goto done;
1120 3efd8e31 2022-10-23 thomas iref.name_len = strlen(refname);
1121 3efd8e31 2022-10-23 thomas len = sizeof(iref) + iref.name_len;
1122 3efd8e31 2022-10-23 thomas wbuf = imsg_create(ibuf, GOTD_IMSG_REF_UPDATE, 0, 0, len);
1123 3efd8e31 2022-10-23 thomas if (wbuf == NULL) {
1124 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_create REF_UPDATE");
1125 3efd8e31 2022-10-23 thomas goto done;
1128 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &iref, sizeof(iref)) == -1)
1129 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE");
1130 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, iref.name_len) == -1)
1131 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE");
1132 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1133 3efd8e31 2022-10-23 thomas imsg_close(ibuf, wbuf);
1135 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
1136 3efd8e31 2022-10-23 thomas if (err)
1137 3efd8e31 2022-10-23 thomas goto done;
1139 3efd8e31 2022-10-23 thomas /* Wait for ACK or an error. */
1140 3efd8e31 2022-10-23 thomas while (!done && err == NULL) {
1141 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
1142 3efd8e31 2022-10-23 thomas if (err)
1144 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1145 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1146 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
1148 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ACK:
1149 3efd8e31 2022-10-23 thomas err = recv_ack(&imsg, iref.new_id);
1150 3efd8e31 2022-10-23 thomas if (err)
1152 3efd8e31 2022-10-23 thomas done = 1;
1154 3efd8e31 2022-10-23 thomas default:
1155 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1159 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1162 3efd8e31 2022-10-23 thomas free(capabilities_str);
1163 3efd8e31 2022-10-23 thomas free(refname);
1164 3efd8e31 2022-10-23 thomas return err;
1167 3efd8e31 2022-10-23 thomas static const struct got_error *
1168 3efd8e31 2022-10-23 thomas recv_packfile(struct imsg *imsg, int infd)
1170 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1171 3efd8e31 2022-10-23 thomas size_t datalen;
1172 3efd8e31 2022-10-23 thomas int packfd;
1173 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1174 3efd8e31 2022-10-23 thomas int pack_done = 0;
1176 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1177 3efd8e31 2022-10-23 thomas if (datalen != 0)
1178 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1180 3efd8e31 2022-10-23 thomas if (imsg->fd == -1)
1181 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1183 3efd8e31 2022-10-23 thomas packfd = imsg->fd;
1184 3efd8e31 2022-10-23 thomas while (!pack_done) {
1185 3efd8e31 2022-10-23 thomas ssize_t r = 0;
1187 3efd8e31 2022-10-23 thomas err = got_poll_fd(infd, POLLIN, 1);
1188 3efd8e31 2022-10-23 thomas if (err) {
1189 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_TIMEOUT)
1191 3efd8e31 2022-10-23 thomas err = NULL;
1192 3efd8e31 2022-10-23 thomas } else {
1193 3efd8e31 2022-10-23 thomas r = read(infd, buf, sizeof(buf));
1194 3efd8e31 2022-10-23 thomas if (r == -1) {
1195 3efd8e31 2022-10-23 thomas err = got_error_from_errno("read");
1198 3efd8e31 2022-10-23 thomas if (r == 0) {
1200 3efd8e31 2022-10-23 thomas * Git clients hang up their side of the
1201 3efd8e31 2022-10-23 thomas * connection after sending the pack file.
1203 3efd8e31 2022-10-23 thomas err = NULL;
1204 3efd8e31 2022-10-23 thomas pack_done = 1;
1209 3efd8e31 2022-10-23 thomas if (r == 0) {
1210 3efd8e31 2022-10-23 thomas /* Detect gotd(8) closing the pack pipe when done. */
1211 3efd8e31 2022-10-23 thomas err = got_poll_fd(packfd, POLLOUT, 1);
1212 3efd8e31 2022-10-23 thomas if (err) {
1213 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF)
1215 3efd8e31 2022-10-23 thomas err = NULL;
1216 3efd8e31 2022-10-23 thomas pack_done = 1;
1218 3efd8e31 2022-10-23 thomas } else {
1219 3efd8e31 2022-10-23 thomas /* Write pack data and/or detect pipe being closed. */
1220 3efd8e31 2022-10-23 thomas err = got_poll_write_full(packfd, buf, r);
1221 3efd8e31 2022-10-23 thomas if (err) {
1222 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_EOF)
1223 3efd8e31 2022-10-23 thomas err = NULL;
1229 3efd8e31 2022-10-23 thomas close(packfd);
1230 3efd8e31 2022-10-23 thomas return err;
1233 3efd8e31 2022-10-23 thomas static const struct got_error *
1234 3efd8e31 2022-10-23 thomas report_unpack_status(struct imsg *imsg, int outfd, int chattygot)
1236 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1237 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_status istatus;
1238 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1239 3efd8e31 2022-10-23 thomas size_t datalen, len;
1240 3efd8e31 2022-10-23 thomas char *reason = NULL;
1242 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1243 3efd8e31 2022-10-23 thomas if (datalen < sizeof(istatus))
1244 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1245 3efd8e31 2022-10-23 thomas memcpy(&istatus, imsg->data, sizeof(istatus));
1246 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istatus) + istatus.reason_len)
1247 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1249 fcbb06bf 2023-01-14 thomas reason = strndup(imsg->data + sizeof(istatus), istatus.reason_len);
1250 3efd8e31 2022-10-23 thomas if (reason == NULL) {
1251 fcbb06bf 2023-01-14 thomas err = got_error_from_errno("strndup");
1252 3efd8e31 2022-10-23 thomas goto done;
1255 3efd8e31 2022-10-23 thomas if (err == NULL)
1256 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "unpack ok\n");
1258 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "unpack %s\n", reason);
1259 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf)) {
1260 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_NO_SPACE);
1261 3efd8e31 2022-10-23 thomas goto done;
1264 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, len, chattygot);
1266 3efd8e31 2022-10-23 thomas free(reason);
1267 3efd8e31 2022-10-23 thomas return err;
1270 3efd8e31 2022-10-23 thomas static const struct got_error *
1271 3efd8e31 2022-10-23 thomas recv_ref_update_ok(struct imsg *imsg, int outfd, int chattygot)
1273 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1274 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ok iok;
1275 3efd8e31 2022-10-23 thomas size_t datalen, len;
1276 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1277 3efd8e31 2022-10-23 thomas char *refname = NULL;
1279 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1280 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iok))
1281 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1282 3efd8e31 2022-10-23 thomas memcpy(&iok, imsg->data, sizeof(iok));
1283 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iok) + iok.name_len)
1284 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1286 3efd8e31 2022-10-23 thomas memcpy(&iok, imsg->data, sizeof(iok));
1288 fcbb06bf 2023-01-14 thomas refname = strndup(imsg->data + sizeof(iok), iok.name_len);
1289 3efd8e31 2022-10-23 thomas if (refname == NULL)
1290 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
1292 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "ok %s\n", refname);
1293 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf)) {
1294 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_NO_SPACE);
1295 3efd8e31 2022-10-23 thomas goto done;
1298 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, len, chattygot);
1300 3efd8e31 2022-10-23 thomas free(refname);
1301 3efd8e31 2022-10-23 thomas return err;
1304 3efd8e31 2022-10-23 thomas static const struct got_error *
1305 3efd8e31 2022-10-23 thomas recv_ref_update_ng(struct imsg *imsg, int outfd, int chattygot)
1307 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1308 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ng ing;
1309 3efd8e31 2022-10-23 thomas size_t datalen, len;
1310 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1311 3efd8e31 2022-10-23 thomas char *refname = NULL, *reason = NULL;
1313 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1314 3efd8e31 2022-10-23 thomas if (datalen < sizeof(ing))
1315 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1316 3efd8e31 2022-10-23 thomas memcpy(&ing, imsg->data, sizeof(ing));
1317 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ing) + ing.name_len + ing.reason_len)
1318 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1320 3efd8e31 2022-10-23 thomas memcpy(&ing, imsg->data, sizeof(ing));
1322 fcbb06bf 2023-01-14 thomas refname = strndup(imsg->data + sizeof(ing), ing.name_len);
1323 3efd8e31 2022-10-23 thomas if (refname == NULL)
1324 fcbb06bf 2023-01-14 thomas return got_error_from_errno("strndup");
1326 fcbb06bf 2023-01-14 thomas reason = strndup(imsg->data + sizeof(ing) + ing.name_len,
1327 fcbb06bf 2023-01-14 thomas ing.reason_len);
1328 3efd8e31 2022-10-23 thomas if (reason == NULL) {
1329 fcbb06bf 2023-01-14 thomas err = got_error_from_errno("strndup");
1330 3efd8e31 2022-10-23 thomas goto done;
1333 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "ng %s %s\n", refname, reason);
1334 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf)) {
1335 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_NO_SPACE);
1336 3efd8e31 2022-10-23 thomas goto done;
1339 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, len, chattygot);
1341 3efd8e31 2022-10-23 thomas free(refname);
1342 3efd8e31 2022-10-23 thomas free(reason);
1343 3efd8e31 2022-10-23 thomas return err;
1346 3efd8e31 2022-10-23 thomas static const struct got_error *
1347 3efd8e31 2022-10-23 thomas serve_write(int infd, int outfd, int gotd_sock, const char *repo_path,
1348 3efd8e31 2022-10-23 thomas int chattygot)
1350 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1351 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1352 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
1353 3efd8e31 2022-10-23 thomas enum protostate {
1354 3efd8e31 2022-10-23 thomas STATE_EXPECT_REF_UPDATE,
1355 3efd8e31 2022-10-23 thomas STATE_EXPECT_MORE_REF_UPDATES,
1356 3efd8e31 2022-10-23 thomas STATE_EXPECT_PACKFILE,
1357 3efd8e31 2022-10-23 thomas STATE_PACKFILE_RECEIVED,
1358 3efd8e31 2022-10-23 thomas STATE_REFS_UPDATED,
1360 3efd8e31 2022-10-23 thomas enum protostate curstate = STATE_EXPECT_REF_UPDATE;
1361 3efd8e31 2022-10-23 thomas struct imsg imsg;
1362 3efd8e31 2022-10-23 thomas int report_status = 0;
1364 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, gotd_sock);
1365 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
1367 3efd8e31 2022-10-23 thomas err = announce_refs(outfd, &ibuf, 0, repo_path, chattygot);
1368 3efd8e31 2022-10-23 thomas if (err)
1369 3efd8e31 2022-10-23 thomas goto done;
1371 3efd8e31 2022-10-23 thomas while (curstate != STATE_EXPECT_PACKFILE) {
1373 3efd8e31 2022-10-23 thomas buf[0] = '\0';
1374 3efd8e31 2022-10-23 thomas err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot);
1375 3efd8e31 2022-10-23 thomas if (err)
1377 3efd8e31 2022-10-23 thomas if (n == 0) {
1378 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1379 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1380 3efd8e31 2022-10-23 thomas "unexpected flush packet received");
1381 3efd8e31 2022-10-23 thomas goto done;
1383 3efd8e31 2022-10-23 thomas err = forward_flushpkt(&ibuf);
1384 3efd8e31 2022-10-23 thomas if (err)
1385 3efd8e31 2022-10-23 thomas goto done;
1386 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_PACKFILE;
1387 3efd8e31 2022-10-23 thomas } else if (n >= (SHA1_DIGEST_STRING_LENGTH * 2) + 2) {
1388 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_REF_UPDATE &&
1389 3efd8e31 2022-10-23 thomas curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1390 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1391 3efd8e31 2022-10-23 thomas "unexpected ref-update packet");
1392 3efd8e31 2022-10-23 thomas goto done;
1394 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_REF_UPDATE) {
1395 3efd8e31 2022-10-23 thomas err = recv_ref_update(&report_status,
1396 3efd8e31 2022-10-23 thomas outfd, &ibuf, buf, n, 1, chattygot);
1397 3efd8e31 2022-10-23 thomas } else {
1398 3efd8e31 2022-10-23 thomas err = recv_ref_update(NULL, outfd, &ibuf,
1399 3efd8e31 2022-10-23 thomas buf, n, 0, chattygot);
1401 3efd8e31 2022-10-23 thomas if (err)
1402 3efd8e31 2022-10-23 thomas goto done;
1403 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_MORE_REF_UPDATES;
1404 3efd8e31 2022-10-23 thomas } else {
1405 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_BAD_PACKET);
1406 3efd8e31 2022-10-23 thomas goto done;
1410 3efd8e31 2022-10-23 thomas while (curstate != STATE_PACKFILE_RECEIVED) {
1411 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1412 3efd8e31 2022-10-23 thomas if (err)
1413 3efd8e31 2022-10-23 thomas goto done;
1414 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1415 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1416 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
1417 3efd8e31 2022-10-23 thomas goto done;
1418 3efd8e31 2022-10-23 thomas case GOTD_IMSG_RECV_PACKFILE:
1419 3efd8e31 2022-10-23 thomas err = recv_packfile(&imsg, infd);
1420 3efd8e31 2022-10-23 thomas if (err) {
1421 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF)
1422 3efd8e31 2022-10-23 thomas goto done;
1424 3efd8e31 2022-10-23 thomas * EOF is reported when the client hangs up,
1425 3efd8e31 2022-10-23 thomas * which can happen with Git clients.
1426 3efd8e31 2022-10-23 thomas * The socket should stay half-open so we
1427 3efd8e31 2022-10-23 thomas * can still send our reports if requested.
1429 3efd8e31 2022-10-23 thomas err = NULL;
1431 3efd8e31 2022-10-23 thomas curstate = STATE_PACKFILE_RECEIVED;
1433 3efd8e31 2022-10-23 thomas default:
1434 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1438 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1439 3efd8e31 2022-10-23 thomas if (err)
1440 3efd8e31 2022-10-23 thomas goto done;
1443 3efd8e31 2022-10-23 thomas while (curstate != STATE_REFS_UPDATED && err == NULL) {
1444 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1445 3efd8e31 2022-10-23 thomas if (err)
1447 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1448 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1449 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
1451 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_STATUS:
1452 3efd8e31 2022-10-23 thomas if (!report_status)
1454 3efd8e31 2022-10-23 thomas err = report_unpack_status(&imsg, outfd, chattygot);
1456 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE_OK:
1457 3efd8e31 2022-10-23 thomas if (!report_status)
1459 3efd8e31 2022-10-23 thomas err = recv_ref_update_ok(&imsg, outfd, chattygot);
1461 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE_NG:
1462 3efd8e31 2022-10-23 thomas if (!report_status)
1464 3efd8e31 2022-10-23 thomas err = recv_ref_update_ng(&imsg, outfd, chattygot);
1466 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REFS_UPDATED:
1467 3efd8e31 2022-10-23 thomas curstate = STATE_REFS_UPDATED;
1468 3efd8e31 2022-10-23 thomas err = got_pkt_flushpkt(outfd, chattygot);
1470 3efd8e31 2022-10-23 thomas default:
1471 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1475 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1478 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
1479 3efd8e31 2022-10-23 thomas if (err)
1480 3efd8e31 2022-10-23 thomas echo_error(err, outfd, chattygot);
1481 3efd8e31 2022-10-23 thomas return err;
1484 3efd8e31 2022-10-23 thomas const struct got_error *
1485 3efd8e31 2022-10-23 thomas got_serve(int infd, int outfd, const char *gitcmd, int gotd_sock, int chattygot)
1487 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1488 3efd8e31 2022-10-23 thomas char *command = NULL, *repo_path = NULL;
1490 3efd8e31 2022-10-23 thomas err = parse_command(&command, &repo_path, gitcmd);
1491 3efd8e31 2022-10-23 thomas if (err)
1492 3efd8e31 2022-10-23 thomas return err;
1494 3efd8e31 2022-10-23 thomas if (strcmp(command, GOT_SERVE_CMD_FETCH) == 0)
1495 3efd8e31 2022-10-23 thomas err = serve_read(infd, outfd, gotd_sock, repo_path, chattygot);
1496 3efd8e31 2022-10-23 thomas else if (strcmp(command, GOT_SERVE_CMD_SEND) == 0)
1497 3efd8e31 2022-10-23 thomas err = serve_write(infd, outfd, gotd_sock, repo_path, chattygot);
1499 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_BAD_PACKET);
1501 3efd8e31 2022-10-23 thomas free(command);
1502 3efd8e31 2022-10-23 thomas free(repo_path);
1503 3efd8e31 2022-10-23 thomas return err;
