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 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, len, chattygot);
272 3efd8e31 2022-10-23 thomas static const struct got_error *
273 3efd8e31 2022-10-23 thomas announce_refs(int outfd, struct imsgbuf *ibuf, int client_is_reading,
274 3efd8e31 2022-10-23 thomas const char *repo_path, int chattygot)
276 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
277 3efd8e31 2022-10-23 thomas struct imsg imsg;
278 3efd8e31 2022-10-23 thomas size_t datalen;
279 3efd8e31 2022-10-23 thomas struct gotd_imsg_list_refs lsref;
280 3efd8e31 2022-10-23 thomas struct gotd_imsg_reflist ireflist;
281 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref iref;
282 3efd8e31 2022-10-23 thomas struct gotd_imsg_symref isymref;
283 3efd8e31 2022-10-23 thomas size_t nrefs = 0;
284 3efd8e31 2022-10-23 thomas int have_nrefs = 0, sent_capabilities = 0;
285 3efd8e31 2022-10-23 thomas char *symrefname = NULL, *symreftarget = NULL, *symrefstr = NULL;
286 3efd8e31 2022-10-23 thomas char *refname = NULL;
288 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
289 3efd8e31 2022-10-23 thomas memset(&lsref, 0, sizeof(lsref));
291 3efd8e31 2022-10-23 thomas if (strlcpy(lsref.repo_name, repo_path, sizeof(lsref.repo_name)) >=
292 3efd8e31 2022-10-23 thomas sizeof(lsref.repo_name))
293 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
294 3efd8e31 2022-10-23 thomas lsref.client_is_reading = client_is_reading;
296 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_LIST_REFS, 0, 0, -1,
297 3efd8e31 2022-10-23 thomas &lsref, sizeof(lsref)) == -1)
298 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose LIST_REFS");
300 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
302 3efd8e31 2022-10-23 thomas return err;
304 3efd8e31 2022-10-23 thomas while (!have_nrefs || nrefs > 0) {
305 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
307 3efd8e31 2022-10-23 thomas goto done;
308 3efd8e31 2022-10-23 thomas datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
309 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
310 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
311 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
312 3efd8e31 2022-10-23 thomas goto done;
313 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REFLIST:
314 3efd8e31 2022-10-23 thomas if (have_nrefs || nrefs > 0) {
315 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
316 3efd8e31 2022-10-23 thomas goto done;
318 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ireflist)) {
319 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
320 3efd8e31 2022-10-23 thomas goto done;
322 3efd8e31 2022-10-23 thomas memcpy(&ireflist, imsg.data, sizeof(ireflist));
323 3efd8e31 2022-10-23 thomas nrefs = ireflist.nrefs;
324 3efd8e31 2022-10-23 thomas have_nrefs = 1;
325 3efd8e31 2022-10-23 thomas if (nrefs == 0)
326 2a0fb198 2022-11-08 thomas err = send_zero_refs(outfd, client_is_reading,
327 2a0fb198 2022-11-08 thomas chattygot);
329 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF:
330 3efd8e31 2022-10-23 thomas if (!have_nrefs || nrefs == 0) {
331 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
332 3efd8e31 2022-10-23 thomas goto done;
334 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iref)) {
335 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
336 3efd8e31 2022-10-23 thomas goto done;
338 3efd8e31 2022-10-23 thomas memcpy(&iref, imsg.data, sizeof(iref));
339 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iref) + iref.name_len) {
340 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
341 3efd8e31 2022-10-23 thomas goto done;
343 3efd8e31 2022-10-23 thomas refname = malloc(iref.name_len + 1);
344 3efd8e31 2022-10-23 thomas if (refname == NULL) {
345 3efd8e31 2022-10-23 thomas err = got_error_from_errno("malloc");
346 3efd8e31 2022-10-23 thomas goto done;
348 3efd8e31 2022-10-23 thomas memcpy(refname, imsg.data + sizeof(iref),
349 3efd8e31 2022-10-23 thomas iref.name_len);
350 3efd8e31 2022-10-23 thomas refname[iref.name_len] = '\0';
351 3efd8e31 2022-10-23 thomas err = send_ref(outfd, iref.id, refname,
352 3efd8e31 2022-10-23 thomas !sent_capabilities, client_is_reading,
353 3efd8e31 2022-10-23 thomas NULL, chattygot);
354 3efd8e31 2022-10-23 thomas free(refname);
355 3efd8e31 2022-10-23 thomas refname = NULL;
357 3efd8e31 2022-10-23 thomas goto done;
358 3efd8e31 2022-10-23 thomas sent_capabilities = 1;
359 3efd8e31 2022-10-23 thomas if (nrefs > 0)
362 3efd8e31 2022-10-23 thomas case GOTD_IMSG_SYMREF:
363 3efd8e31 2022-10-23 thomas if (!have_nrefs || nrefs == 0) {
364 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
365 3efd8e31 2022-10-23 thomas goto done;
367 3efd8e31 2022-10-23 thomas if (datalen < sizeof(isymref)) {
368 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
369 3efd8e31 2022-10-23 thomas goto done;
371 3efd8e31 2022-10-23 thomas memcpy(&isymref, imsg.data, sizeof(isymref));
372 3efd8e31 2022-10-23 thomas if (datalen != sizeof(isymref) + isymref.name_len +
373 3efd8e31 2022-10-23 thomas isymref.target_len) {
374 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
375 3efd8e31 2022-10-23 thomas goto done;
379 3efd8e31 2022-10-23 thomas * For now, we only announce one symbolic ref,
380 3efd8e31 2022-10-23 thomas * as part of our capability advertisement.
382 3efd8e31 2022-10-23 thomas if (sent_capabilities || symrefstr != NULL ||
383 3efd8e31 2022-10-23 thomas symrefname != NULL || symreftarget != NULL)
386 3efd8e31 2022-10-23 thomas symrefname = malloc(isymref.name_len + 1);
387 3efd8e31 2022-10-23 thomas if (symrefname == NULL) {
388 3efd8e31 2022-10-23 thomas err = got_error_from_errno("malloc");
389 3efd8e31 2022-10-23 thomas goto done;
391 3efd8e31 2022-10-23 thomas memcpy(symrefname, imsg.data + sizeof(isymref),
392 3efd8e31 2022-10-23 thomas isymref.name_len);
393 3efd8e31 2022-10-23 thomas symrefname[isymref.name_len] = '\0';
395 3efd8e31 2022-10-23 thomas symreftarget = malloc(isymref.target_len + 1);
396 3efd8e31 2022-10-23 thomas if (symreftarget == NULL) {
397 3efd8e31 2022-10-23 thomas err = got_error_from_errno("malloc");
398 3efd8e31 2022-10-23 thomas goto done;
400 3efd8e31 2022-10-23 thomas memcpy(symreftarget,
401 3efd8e31 2022-10-23 thomas imsg.data + sizeof(isymref) + isymref.name_len,
402 3efd8e31 2022-10-23 thomas isymref.target_len);
403 3efd8e31 2022-10-23 thomas symreftarget[isymref.target_len] = '\0';
405 3efd8e31 2022-10-23 thomas if (asprintf(&symrefstr, "%s:%s", symrefname,
406 3efd8e31 2022-10-23 thomas symreftarget) == -1) {
407 3efd8e31 2022-10-23 thomas err = got_error_from_errno("asprintf");
408 3efd8e31 2022-10-23 thomas goto done;
410 3efd8e31 2022-10-23 thomas err = send_ref(outfd, isymref.target_id, symrefname,
411 3efd8e31 2022-10-23 thomas !sent_capabilities, client_is_reading, symrefstr,
412 3efd8e31 2022-10-23 thomas chattygot);
413 3efd8e31 2022-10-23 thomas free(refname);
414 3efd8e31 2022-10-23 thomas refname = NULL;
416 3efd8e31 2022-10-23 thomas goto done;
417 3efd8e31 2022-10-23 thomas sent_capabilities = 1;
418 3efd8e31 2022-10-23 thomas if (nrefs > 0)
422 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
426 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
429 3efd8e31 2022-10-23 thomas err = got_pkt_flushpkt(outfd, chattygot);
431 3efd8e31 2022-10-23 thomas goto done;
433 3efd8e31 2022-10-23 thomas free(symrefstr);
434 3efd8e31 2022-10-23 thomas free(symrefname);
435 3efd8e31 2022-10-23 thomas free(symreftarget);
436 3efd8e31 2022-10-23 thomas return err;
439 3efd8e31 2022-10-23 thomas static const struct got_error *
440 3efd8e31 2022-10-23 thomas parse_want_line(char **common_capabilities, uint8_t *id, char *buf, size_t len)
442 3efd8e31 2022-10-23 thomas const struct got_error *err;
443 3efd8e31 2022-10-23 thomas char *id_str = NULL, *client_capabilities = NULL;
445 3efd8e31 2022-10-23 thomas err = got_gitproto_parse_want_line(&id_str,
446 3efd8e31 2022-10-23 thomas &client_capabilities, buf, len);
448 3efd8e31 2022-10-23 thomas return err;
450 3efd8e31 2022-10-23 thomas if (!got_parse_sha1_digest(id, id_str)) {
451 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
452 3efd8e31 2022-10-23 thomas "want-line with bad object ID");
453 3efd8e31 2022-10-23 thomas goto done;
456 3efd8e31 2022-10-23 thomas if (client_capabilities) {
457 3efd8e31 2022-10-23 thomas err = got_gitproto_match_capabilities(common_capabilities,
458 3efd8e31 2022-10-23 thomas NULL, client_capabilities, read_capabilities,
459 3efd8e31 2022-10-23 thomas nitems(read_capabilities));
461 3efd8e31 2022-10-23 thomas goto done;
464 3efd8e31 2022-10-23 thomas free(id_str);
465 3efd8e31 2022-10-23 thomas free(client_capabilities);
466 3efd8e31 2022-10-23 thomas return err;
469 3efd8e31 2022-10-23 thomas static const struct got_error *
470 3efd8e31 2022-10-23 thomas parse_have_line(uint8_t *id, char *buf, size_t len)
472 3efd8e31 2022-10-23 thomas const struct got_error *err;
473 3efd8e31 2022-10-23 thomas char *id_str = NULL;
475 3efd8e31 2022-10-23 thomas err = got_gitproto_parse_have_line(&id_str, buf, len);
477 3efd8e31 2022-10-23 thomas return err;
479 3efd8e31 2022-10-23 thomas if (!got_parse_sha1_digest(id, id_str)) {
480 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
481 3efd8e31 2022-10-23 thomas "have-line with bad object ID");
482 3efd8e31 2022-10-23 thomas goto done;
485 3efd8e31 2022-10-23 thomas free(id_str);
486 3efd8e31 2022-10-23 thomas return err;
489 3efd8e31 2022-10-23 thomas static const struct got_error *
490 3efd8e31 2022-10-23 thomas send_capability(struct got_capability *capa, struct imsgbuf *ibuf)
492 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
493 3efd8e31 2022-10-23 thomas struct gotd_imsg_capability icapa;
494 3efd8e31 2022-10-23 thomas size_t len;
495 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
497 3efd8e31 2022-10-23 thomas memset(&icapa, 0, sizeof(icapa));
499 3efd8e31 2022-10-23 thomas icapa.key_len = strlen(capa->key);
500 3efd8e31 2022-10-23 thomas len = sizeof(icapa) + icapa.key_len;
501 3efd8e31 2022-10-23 thomas if (capa->value) {
502 3efd8e31 2022-10-23 thomas icapa.value_len = strlen(capa->value);
503 3efd8e31 2022-10-23 thomas len += icapa.value_len;
506 3efd8e31 2022-10-23 thomas wbuf = imsg_create(ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
507 3efd8e31 2022-10-23 thomas if (wbuf == NULL) {
508 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_create CAPABILITY");
509 3efd8e31 2022-10-23 thomas return err;
512 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
513 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add CAPABILITY");
514 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
515 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add CAPABILITY");
516 3efd8e31 2022-10-23 thomas if (capa->value) {
517 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
518 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add CAPABILITY");
521 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
522 3efd8e31 2022-10-23 thomas imsg_close(ibuf, wbuf);
524 3efd8e31 2022-10-23 thomas return NULL;
527 3efd8e31 2022-10-23 thomas static const struct got_error *
528 3efd8e31 2022-10-23 thomas send_capabilities(int *use_sidebands, int *report_status,
529 3efd8e31 2022-10-23 thomas char *capabilities_str, struct imsgbuf *ibuf)
531 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
532 3efd8e31 2022-10-23 thomas struct gotd_imsg_capabilities icapas;
533 3efd8e31 2022-10-23 thomas struct got_capability *capa = NULL;
534 3efd8e31 2022-10-23 thomas size_t ncapa, i;
536 3efd8e31 2022-10-23 thomas err = got_gitproto_split_capabilities_str(&capa, &ncapa,
537 3efd8e31 2022-10-23 thomas capabilities_str);
539 3efd8e31 2022-10-23 thomas return err;
541 3efd8e31 2022-10-23 thomas icapas.ncapabilities = ncapa;
542 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_CAPABILITIES, 0, 0, -1,
543 3efd8e31 2022-10-23 thomas &icapas, sizeof(icapas)) == -1) {
544 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_compose IMSG_CAPABILITIES");
545 3efd8e31 2022-10-23 thomas goto done;
548 3efd8e31 2022-10-23 thomas for (i = 0; i < ncapa; i++) {
549 3efd8e31 2022-10-23 thomas err = send_capability(&capa[i], ibuf);
551 3efd8e31 2022-10-23 thomas goto done;
552 3efd8e31 2022-10-23 thomas if (use_sidebands &&
553 3efd8e31 2022-10-23 thomas strcmp(capa[i].key, GOT_CAPA_SIDE_BAND_64K) == 0)
554 3efd8e31 2022-10-23 thomas *use_sidebands = 1;
555 3efd8e31 2022-10-23 thomas if (report_status &&
556 3efd8e31 2022-10-23 thomas strcmp(capa[i].key, GOT_CAPA_REPORT_STATUS) == 0)
557 3efd8e31 2022-10-23 thomas *report_status = 1;
560 3efd8e31 2022-10-23 thomas free(capa);
561 3efd8e31 2022-10-23 thomas return err;
564 3efd8e31 2022-10-23 thomas static const struct got_error *
565 3efd8e31 2022-10-23 thomas forward_flushpkt(struct imsgbuf *ibuf)
567 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_FLUSH, 0, 0, -1, NULL, 0) == -1)
568 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose FLUSH");
570 3efd8e31 2022-10-23 thomas return gotd_imsg_flush(ibuf);
573 3efd8e31 2022-10-23 thomas static const struct got_error *
574 3efd8e31 2022-10-23 thomas recv_ack(struct imsg *imsg, uint8_t *expected_id)
576 3efd8e31 2022-10-23 thomas struct gotd_imsg_ack iack;
577 3efd8e31 2022-10-23 thomas size_t datalen;
579 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
580 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iack))
581 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
583 3efd8e31 2022-10-23 thomas memcpy(&iack, imsg->data, sizeof(iack));
584 3efd8e31 2022-10-23 thomas if (memcmp(iack.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
585 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
587 3efd8e31 2022-10-23 thomas return NULL;
590 3efd8e31 2022-10-23 thomas static const struct got_error *
591 3efd8e31 2022-10-23 thomas recv_nak(struct imsg *imsg, uint8_t *expected_id)
593 3efd8e31 2022-10-23 thomas struct gotd_imsg_ack inak;
594 3efd8e31 2022-10-23 thomas size_t datalen;
596 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
597 3efd8e31 2022-10-23 thomas if (datalen != sizeof(inak))
598 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
600 3efd8e31 2022-10-23 thomas memcpy(&inak, imsg->data, sizeof(inak));
601 3efd8e31 2022-10-23 thomas if (memcmp(inak.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
602 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
604 3efd8e31 2022-10-23 thomas return NULL;
608 3efd8e31 2022-10-23 thomas static const struct got_error *
609 3efd8e31 2022-10-23 thomas recv_want(int *use_sidebands, int outfd, struct imsgbuf *ibuf,
610 3efd8e31 2022-10-23 thomas char *buf, size_t len, int expect_capabilities, int chattygot)
612 3efd8e31 2022-10-23 thomas const struct got_error *err;
613 3efd8e31 2022-10-23 thomas struct gotd_imsg_want iwant;
614 3efd8e31 2022-10-23 thomas char *capabilities_str;
615 3efd8e31 2022-10-23 thomas int done = 0;
616 3efd8e31 2022-10-23 thomas struct imsg imsg;
618 3efd8e31 2022-10-23 thomas memset(&iwant, 0, sizeof(iwant));
619 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
621 3efd8e31 2022-10-23 thomas err = parse_want_line(&capabilities_str, iwant.object_id, buf, len);
623 3efd8e31 2022-10-23 thomas return err;
625 3efd8e31 2022-10-23 thomas if (capabilities_str) {
626 3efd8e31 2022-10-23 thomas if (!expect_capabilities) {
627 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
628 3efd8e31 2022-10-23 thomas "unexpected capability announcement received");
629 3efd8e31 2022-10-23 thomas goto done;
631 3efd8e31 2022-10-23 thomas err = send_capabilities(use_sidebands, NULL, capabilities_str,
634 3efd8e31 2022-10-23 thomas goto done;
638 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_WANT, 0, 0, -1,
639 3efd8e31 2022-10-23 thomas &iwant, sizeof(iwant)) == -1) {
640 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_compose WANT");
641 3efd8e31 2022-10-23 thomas goto done;
644 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
646 3efd8e31 2022-10-23 thomas goto done;
649 3efd8e31 2022-10-23 thomas * Wait for an ACK, or an error in case the desired object
650 3efd8e31 2022-10-23 thomas * does not exist.
652 3efd8e31 2022-10-23 thomas while (!done && err == NULL) {
653 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
656 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
657 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
658 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
660 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ACK:
661 3efd8e31 2022-10-23 thomas err = recv_ack(&imsg, iwant.object_id);
664 3efd8e31 2022-10-23 thomas done = 1;
667 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
671 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
674 3efd8e31 2022-10-23 thomas free(capabilities_str);
675 3efd8e31 2022-10-23 thomas return err;
678 3efd8e31 2022-10-23 thomas static const struct got_error *
679 3efd8e31 2022-10-23 thomas send_ack(int outfd, uint8_t *id, int chattygot)
681 3efd8e31 2022-10-23 thomas char hex[SHA1_DIGEST_STRING_LENGTH];
682 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
685 946e0798 2022-11-06 thomas if (got_sha1_digest_to_str(id, hex, sizeof(hex)) == NULL)
686 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_BAD_OBJ_ID);
688 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "ACK %s\n", hex);
689 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf))
690 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
692 3efd8e31 2022-10-23 thomas return got_pkt_writepkt(outfd, buf, len, chattygot);
695 3efd8e31 2022-10-23 thomas static const struct got_error *
696 3efd8e31 2022-10-23 thomas send_nak(int outfd, int chattygot)
698 3efd8e31 2022-10-23 thomas char buf[5];
701 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "NAK\n");
702 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf))
703 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_NO_SPACE);
705 3efd8e31 2022-10-23 thomas return got_pkt_writepkt(outfd, buf, len, chattygot);
708 3efd8e31 2022-10-23 thomas static const struct got_error *
709 3efd8e31 2022-10-23 thomas recv_have(int *have_ack, int outfd, struct imsgbuf *ibuf, char *buf,
710 3efd8e31 2022-10-23 thomas size_t len, int chattygot)
712 3efd8e31 2022-10-23 thomas const struct got_error *err;
713 3efd8e31 2022-10-23 thomas struct gotd_imsg_have ihave;
714 3efd8e31 2022-10-23 thomas int done = 0;
715 3efd8e31 2022-10-23 thomas struct imsg imsg;
717 3efd8e31 2022-10-23 thomas memset(&ihave, 0, sizeof(ihave));
718 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
720 3efd8e31 2022-10-23 thomas err = parse_have_line(ihave.object_id, buf, len);
722 3efd8e31 2022-10-23 thomas return err;
724 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_HAVE, 0, 0, -1,
725 3efd8e31 2022-10-23 thomas &ihave, sizeof(ihave)) == -1)
726 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose HAVE");
728 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
730 3efd8e31 2022-10-23 thomas return err;
733 3efd8e31 2022-10-23 thomas * Wait for an ACK or a NAK, indicating whether a common
734 3efd8e31 2022-10-23 thomas * commit object has been found.
736 3efd8e31 2022-10-23 thomas while (!done && err == NULL) {
737 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
739 3efd8e31 2022-10-23 thomas return err;
740 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
741 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
742 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
744 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ACK:
745 3efd8e31 2022-10-23 thomas err = recv_ack(&imsg, ihave.object_id);
748 3efd8e31 2022-10-23 thomas if (!*have_ack) {
749 3efd8e31 2022-10-23 thomas err = send_ack(outfd, ihave.object_id,
750 3efd8e31 2022-10-23 thomas chattygot);
752 3efd8e31 2022-10-23 thomas return err;
753 3efd8e31 2022-10-23 thomas *have_ack = 1;
755 3efd8e31 2022-10-23 thomas done = 1;
757 3efd8e31 2022-10-23 thomas case GOTD_IMSG_NAK:
758 3efd8e31 2022-10-23 thomas err = recv_nak(&imsg, ihave.object_id);
761 3efd8e31 2022-10-23 thomas done = 1;
764 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
768 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
771 3efd8e31 2022-10-23 thomas return err;
774 3efd8e31 2022-10-23 thomas static const struct got_error *
775 3efd8e31 2022-10-23 thomas recv_done(int *packfd, int outfd, struct imsgbuf *ibuf, int chattygot)
777 3efd8e31 2022-10-23 thomas const struct got_error *err;
778 3efd8e31 2022-10-23 thomas struct imsg imsg;
780 3efd8e31 2022-10-23 thomas *packfd = -1;
782 3efd8e31 2022-10-23 thomas if (imsg_compose(ibuf, GOTD_IMSG_DONE, 0, 0, -1, NULL, 0) == -1)
783 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_compose DONE");
785 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
787 3efd8e31 2022-10-23 thomas return err;
789 cc4cc677 2022-10-28 thomas while (*packfd == -1 && err == NULL) {
790 cc4cc677 2022-10-28 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
794 cc4cc677 2022-10-28 thomas switch (imsg.hdr.type) {
795 cc4cc677 2022-10-28 thomas case GOTD_IMSG_ERROR:
796 cc4cc677 2022-10-28 thomas err = gotd_imsg_recv_error(NULL, &imsg);
798 cc4cc677 2022-10-28 thomas case GOTD_IMSG_PACKFILE_PIPE:
799 cc4cc677 2022-10-28 thomas if (imsg.fd != -1)
800 cc4cc677 2022-10-28 thomas *packfd = imsg.fd;
802 cc4cc677 2022-10-28 thomas err = got_error(GOT_ERR_PRIVSEP_NO_FD);
805 cc4cc677 2022-10-28 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
809 cc4cc677 2022-10-28 thomas imsg_free(&imsg);
812 3efd8e31 2022-10-23 thomas return err;
815 3efd8e31 2022-10-23 thomas static const struct got_error *
816 3efd8e31 2022-10-23 thomas relay_progress_reports(struct imsgbuf *ibuf, int outfd, int chattygot)
818 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
819 3efd8e31 2022-10-23 thomas int pack_starting = 0;
820 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_progress iprog;
821 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
822 3efd8e31 2022-10-23 thomas struct imsg imsg;
823 3efd8e31 2022-10-23 thomas size_t datalen;
824 3efd8e31 2022-10-23 thomas int p_deltify = 0, n;
825 3efd8e31 2022-10-23 thomas const char *eol = "\r";
827 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
829 3efd8e31 2022-10-23 thomas while (!pack_starting && err == NULL) {
830 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
834 3efd8e31 2022-10-23 thomas datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
835 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
836 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
837 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
839 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_READY:
840 3efd8e31 2022-10-23 thomas eol = "\n";
841 3efd8e31 2022-10-23 thomas pack_starting = 1;
842 3efd8e31 2022-10-23 thomas /* fallthrough */
843 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_PROGRESS:
844 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iprog)) {
845 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_LEN);
848 3efd8e31 2022-10-23 thomas memcpy(&iprog, imsg.data, sizeof(iprog));
849 3efd8e31 2022-10-23 thomas if (iprog.nobj_total > 0) {
850 3efd8e31 2022-10-23 thomas p_deltify = (iprog.nobj_deltify * 100) /
851 3efd8e31 2022-10-23 thomas iprog.nobj_total;
853 3efd8e31 2022-10-23 thomas buf[0] = GOT_SIDEBAND_PROGRESS_INFO;
854 3efd8e31 2022-10-23 thomas n = snprintf(&buf[1], sizeof(buf) - 1,
855 3efd8e31 2022-10-23 thomas "%d commits colored, "
856 3efd8e31 2022-10-23 thomas "%d objects found, "
857 3efd8e31 2022-10-23 thomas "deltify %d%%%s",
858 946e0798 2022-11-06 thomas iprog.ncolored,
859 946e0798 2022-11-06 thomas iprog.nfound,
860 3efd8e31 2022-10-23 thomas p_deltify, eol);
861 3efd8e31 2022-10-23 thomas if (n >= sizeof(buf) - 1)
863 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, 1 + n, chattygot);
866 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
870 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
873 3efd8e31 2022-10-23 thomas return err;
876 3efd8e31 2022-10-23 thomas static const struct got_error *
877 3efd8e31 2022-10-23 thomas serve_read(int infd, int outfd, int gotd_sock, const char *repo_path,
878 3efd8e31 2022-10-23 thomas int chattygot)
880 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
881 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
882 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
883 3efd8e31 2022-10-23 thomas enum protostate {
884 3efd8e31 2022-10-23 thomas STATE_EXPECT_WANT,
885 3efd8e31 2022-10-23 thomas STATE_EXPECT_MORE_WANT,
886 3efd8e31 2022-10-23 thomas STATE_EXPECT_HAVE,
887 3efd8e31 2022-10-23 thomas STATE_EXPECT_DONE,
888 3efd8e31 2022-10-23 thomas STATE_DONE,
890 3efd8e31 2022-10-23 thomas enum protostate curstate = STATE_EXPECT_WANT;
891 3efd8e31 2022-10-23 thomas int have_ack = 0, use_sidebands = 0, seen_have = 0;
892 3efd8e31 2022-10-23 thomas int packfd = -1;
893 3efd8e31 2022-10-23 thomas size_t pack_chunksize;
895 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, gotd_sock);
897 3efd8e31 2022-10-23 thomas err = announce_refs(outfd, &ibuf, 1, repo_path, chattygot);
899 3efd8e31 2022-10-23 thomas goto done;
901 3efd8e31 2022-10-23 thomas while (curstate != STATE_DONE) {
903 3efd8e31 2022-10-23 thomas buf[0] = '\0';
904 3efd8e31 2022-10-23 thomas err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot);
907 3efd8e31 2022-10-23 thomas if (n == 0) {
908 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_MORE_WANT &&
909 3efd8e31 2022-10-23 thomas curstate != STATE_EXPECT_HAVE) {
910 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
911 3efd8e31 2022-10-23 thomas "unexpected flush packet received");
912 3efd8e31 2022-10-23 thomas goto done;
914 3efd8e31 2022-10-23 thomas err = forward_flushpkt(&ibuf);
916 3efd8e31 2022-10-23 thomas goto done;
917 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_HAVE && !have_ack) {
918 3efd8e31 2022-10-23 thomas err = send_nak(outfd, chattygot);
920 3efd8e31 2022-10-23 thomas goto done;
922 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_MORE_WANT)
923 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_HAVE;
925 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_DONE;
926 3efd8e31 2022-10-23 thomas } else if (n >= 5 && strncmp(buf, "want ", 5) == 0) {
927 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_WANT &&
928 3efd8e31 2022-10-23 thomas curstate != STATE_EXPECT_MORE_WANT) {
929 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
930 3efd8e31 2022-10-23 thomas "unexpected 'want' packet");
931 3efd8e31 2022-10-23 thomas goto done;
933 3efd8e31 2022-10-23 thomas err = recv_want(&use_sidebands, outfd, &ibuf, buf, n,
934 3efd8e31 2022-10-23 thomas curstate == STATE_EXPECT_WANT ? 1 : 0, chattygot);
936 3efd8e31 2022-10-23 thomas goto done;
937 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_WANT)
938 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_MORE_WANT;
939 3efd8e31 2022-10-23 thomas } else if (n >= 5 && strncmp(buf, "have ", 5) == 0) {
940 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_HAVE) {
941 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
942 3efd8e31 2022-10-23 thomas "unexpected 'have' packet");
943 3efd8e31 2022-10-23 thomas goto done;
945 3efd8e31 2022-10-23 thomas err = recv_have(&have_ack, outfd, &ibuf, buf, n,
946 3efd8e31 2022-10-23 thomas chattygot);
948 3efd8e31 2022-10-23 thomas goto done;
949 3efd8e31 2022-10-23 thomas seen_have = 1;
950 3efd8e31 2022-10-23 thomas } else if (n == 5 && strncmp(buf, "done\n", 5) == 0) {
951 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_HAVE &&
952 3efd8e31 2022-10-23 thomas curstate != STATE_EXPECT_DONE) {
953 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
954 3efd8e31 2022-10-23 thomas "unexpected 'done' packet");
955 3efd8e31 2022-10-23 thomas goto done;
957 3efd8e31 2022-10-23 thomas err = recv_done(&packfd, outfd, &ibuf, chattygot);
959 3efd8e31 2022-10-23 thomas goto done;
960 3efd8e31 2022-10-23 thomas curstate = STATE_DONE;
963 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_BAD_PACKET);
964 3efd8e31 2022-10-23 thomas goto done;
968 3efd8e31 2022-10-23 thomas if (!seen_have) {
969 3efd8e31 2022-10-23 thomas err = send_nak(outfd, chattygot);
971 3efd8e31 2022-10-23 thomas goto done;
974 3efd8e31 2022-10-23 thomas if (use_sidebands) {
975 3efd8e31 2022-10-23 thomas err = relay_progress_reports(&ibuf, outfd, chattygot);
977 3efd8e31 2022-10-23 thomas goto done;
978 3efd8e31 2022-10-23 thomas pack_chunksize = GOT_SIDEBAND_64K_PACKFILE_DATA_MAX;
980 3efd8e31 2022-10-23 thomas pack_chunksize = sizeof(buf);
982 3efd8e31 2022-10-23 thomas for (;;) {
983 89077ea1 2022-10-31 thomas ssize_t r;
985 3efd8e31 2022-10-23 thomas r = read(packfd, use_sidebands ? &buf[1] : buf,
986 3efd8e31 2022-10-23 thomas pack_chunksize);
987 3efd8e31 2022-10-23 thomas if (r == -1) {
988 3efd8e31 2022-10-23 thomas err = got_error_from_errno("read");
990 3efd8e31 2022-10-23 thomas } else if (r == 0) {
991 3efd8e31 2022-10-23 thomas err = got_pkt_flushpkt(outfd, chattygot);
995 3efd8e31 2022-10-23 thomas if (use_sidebands) {
996 3efd8e31 2022-10-23 thomas buf[0] = GOT_SIDEBAND_PACKFILE_DATA;
997 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, 1 + r, chattygot);
1000 3efd8e31 2022-10-23 thomas } else {
1001 89077ea1 2022-10-31 thomas err = got_poll_write_full(outfd, buf, r);
1002 89077ea1 2022-10-31 thomas if (err) {
1003 89077ea1 2022-10-31 thomas if (err->code == GOT_ERR_EOF)
1004 89077ea1 2022-10-31 thomas err = NULL;
1010 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
1011 3efd8e31 2022-10-23 thomas if (packfd != -1 && close(packfd) == -1 && err == NULL)
1012 3efd8e31 2022-10-23 thomas err = got_error_from_errno("close");
1013 3efd8e31 2022-10-23 thomas if (err)
1014 3efd8e31 2022-10-23 thomas echo_error(err, outfd, chattygot);
1015 3efd8e31 2022-10-23 thomas return err;
1018 3efd8e31 2022-10-23 thomas static const struct got_error *
1019 3efd8e31 2022-10-23 thomas parse_ref_update_line(char **common_capabilities, char **refname,
1020 3efd8e31 2022-10-23 thomas uint8_t *old_id, uint8_t *new_id, char *buf, size_t len)
1022 3efd8e31 2022-10-23 thomas const struct got_error *err;
1023 3efd8e31 2022-10-23 thomas char *old_id_str = NULL, *new_id_str = NULL;
1024 3efd8e31 2022-10-23 thomas char *client_capabilities = NULL;
1026 3efd8e31 2022-10-23 thomas *refname = NULL;
1028 3efd8e31 2022-10-23 thomas err = got_gitproto_parse_ref_update_line(&old_id_str, &new_id_str,
1029 3efd8e31 2022-10-23 thomas refname, &client_capabilities, buf, len);
1030 3efd8e31 2022-10-23 thomas if (err)
1031 3efd8e31 2022-10-23 thomas return err;
1033 3efd8e31 2022-10-23 thomas if (!got_parse_sha1_digest(old_id, old_id_str) ||
1034 3efd8e31 2022-10-23 thomas !got_parse_sha1_digest(new_id, new_id_str)) {
1035 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1036 3efd8e31 2022-10-23 thomas "ref-update with bad object ID");
1037 3efd8e31 2022-10-23 thomas goto done;
1039 3efd8e31 2022-10-23 thomas if (!got_ref_name_is_valid(*refname)) {
1040 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1041 3efd8e31 2022-10-23 thomas "ref-update with bad reference name");
1042 3efd8e31 2022-10-23 thomas goto done;
1045 3efd8e31 2022-10-23 thomas if (client_capabilities) {
1046 3efd8e31 2022-10-23 thomas err = got_gitproto_match_capabilities(common_capabilities,
1047 3efd8e31 2022-10-23 thomas NULL, client_capabilities, write_capabilities,
1048 3efd8e31 2022-10-23 thomas nitems(write_capabilities));
1049 3efd8e31 2022-10-23 thomas if (err)
1050 3efd8e31 2022-10-23 thomas goto done;
1053 3efd8e31 2022-10-23 thomas free(old_id_str);
1054 3efd8e31 2022-10-23 thomas free(new_id_str);
1055 3efd8e31 2022-10-23 thomas free(client_capabilities);
1056 3efd8e31 2022-10-23 thomas if (err) {
1057 3efd8e31 2022-10-23 thomas free(*refname);
1058 3efd8e31 2022-10-23 thomas *refname = NULL;
1060 3efd8e31 2022-10-23 thomas return err;
1063 3efd8e31 2022-10-23 thomas static const struct got_error *
1064 3efd8e31 2022-10-23 thomas recv_ref_update(int *report_status, int outfd, struct imsgbuf *ibuf,
1065 3efd8e31 2022-10-23 thomas char *buf, size_t len, int expect_capabilities, int chattygot)
1067 3efd8e31 2022-10-23 thomas const struct got_error *err;
1068 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update iref;
1069 3efd8e31 2022-10-23 thomas struct ibuf *wbuf;
1070 3efd8e31 2022-10-23 thomas char *capabilities_str = NULL, *refname = NULL;
1071 3efd8e31 2022-10-23 thomas int done = 0;
1072 3efd8e31 2022-10-23 thomas struct imsg imsg;
1074 3efd8e31 2022-10-23 thomas memset(&iref, 0, sizeof(iref));
1075 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
1077 3efd8e31 2022-10-23 thomas err = parse_ref_update_line(&capabilities_str, &refname,
1078 3efd8e31 2022-10-23 thomas iref.old_id, iref.new_id, buf, len);
1079 3efd8e31 2022-10-23 thomas if (err)
1080 3efd8e31 2022-10-23 thomas return err;
1082 3efd8e31 2022-10-23 thomas if (capabilities_str) {
1083 3efd8e31 2022-10-23 thomas if (!expect_capabilities) {
1084 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1085 3efd8e31 2022-10-23 thomas "unexpected capability announcement received");
1086 3efd8e31 2022-10-23 thomas goto done;
1088 3efd8e31 2022-10-23 thomas err = send_capabilities(NULL, report_status, capabilities_str,
1090 3efd8e31 2022-10-23 thomas if (err)
1091 3efd8e31 2022-10-23 thomas goto done;
1094 3efd8e31 2022-10-23 thomas iref.name_len = strlen(refname);
1095 3efd8e31 2022-10-23 thomas len = sizeof(iref) + iref.name_len;
1096 3efd8e31 2022-10-23 thomas wbuf = imsg_create(ibuf, GOTD_IMSG_REF_UPDATE, 0, 0, len);
1097 3efd8e31 2022-10-23 thomas if (wbuf == NULL) {
1098 3efd8e31 2022-10-23 thomas err = got_error_from_errno("imsg_create REF_UPDATE");
1099 3efd8e31 2022-10-23 thomas goto done;
1102 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, &iref, sizeof(iref)) == -1)
1103 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE");
1104 3efd8e31 2022-10-23 thomas if (imsg_add(wbuf, refname, iref.name_len) == -1)
1105 3efd8e31 2022-10-23 thomas return got_error_from_errno("imsg_add REF_UPDATE");
1106 3efd8e31 2022-10-23 thomas wbuf->fd = -1;
1107 3efd8e31 2022-10-23 thomas imsg_close(ibuf, wbuf);
1109 3efd8e31 2022-10-23 thomas err = gotd_imsg_flush(ibuf);
1110 3efd8e31 2022-10-23 thomas if (err)
1111 3efd8e31 2022-10-23 thomas goto done;
1113 3efd8e31 2022-10-23 thomas /* Wait for ACK or an error. */
1114 3efd8e31 2022-10-23 thomas while (!done && err == NULL) {
1115 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
1116 3efd8e31 2022-10-23 thomas if (err)
1118 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1119 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1120 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
1122 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ACK:
1123 3efd8e31 2022-10-23 thomas err = recv_ack(&imsg, iref.new_id);
1124 3efd8e31 2022-10-23 thomas if (err)
1126 3efd8e31 2022-10-23 thomas done = 1;
1128 3efd8e31 2022-10-23 thomas default:
1129 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1133 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1136 3efd8e31 2022-10-23 thomas free(capabilities_str);
1137 3efd8e31 2022-10-23 thomas free(refname);
1138 3efd8e31 2022-10-23 thomas return err;
1141 3efd8e31 2022-10-23 thomas static const struct got_error *
1142 3efd8e31 2022-10-23 thomas recv_packfile(struct imsg *imsg, int infd)
1144 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1145 3efd8e31 2022-10-23 thomas size_t datalen;
1146 3efd8e31 2022-10-23 thomas int packfd;
1147 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1148 3efd8e31 2022-10-23 thomas int pack_done = 0;
1150 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1151 3efd8e31 2022-10-23 thomas if (datalen != 0)
1152 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_MSG);
1154 3efd8e31 2022-10-23 thomas if (imsg->fd == -1)
1155 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_NO_FD);
1157 3efd8e31 2022-10-23 thomas packfd = imsg->fd;
1158 3efd8e31 2022-10-23 thomas while (!pack_done) {
1159 3efd8e31 2022-10-23 thomas ssize_t r = 0;
1161 3efd8e31 2022-10-23 thomas err = got_poll_fd(infd, POLLIN, 1);
1162 3efd8e31 2022-10-23 thomas if (err) {
1163 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_TIMEOUT)
1165 3efd8e31 2022-10-23 thomas err = NULL;
1166 3efd8e31 2022-10-23 thomas } else {
1167 3efd8e31 2022-10-23 thomas r = read(infd, buf, sizeof(buf));
1168 3efd8e31 2022-10-23 thomas if (r == -1) {
1169 3efd8e31 2022-10-23 thomas err = got_error_from_errno("read");
1172 3efd8e31 2022-10-23 thomas if (r == 0) {
1174 3efd8e31 2022-10-23 thomas * Git clients hang up their side of the
1175 3efd8e31 2022-10-23 thomas * connection after sending the pack file.
1177 3efd8e31 2022-10-23 thomas err = NULL;
1178 3efd8e31 2022-10-23 thomas pack_done = 1;
1183 3efd8e31 2022-10-23 thomas if (r == 0) {
1184 3efd8e31 2022-10-23 thomas /* Detect gotd(8) closing the pack pipe when done. */
1185 3efd8e31 2022-10-23 thomas err = got_poll_fd(packfd, POLLOUT, 1);
1186 3efd8e31 2022-10-23 thomas if (err) {
1187 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF)
1189 3efd8e31 2022-10-23 thomas err = NULL;
1190 3efd8e31 2022-10-23 thomas pack_done = 1;
1192 3efd8e31 2022-10-23 thomas } else {
1193 3efd8e31 2022-10-23 thomas /* Write pack data and/or detect pipe being closed. */
1194 3efd8e31 2022-10-23 thomas err = got_poll_write_full(packfd, buf, r);
1195 3efd8e31 2022-10-23 thomas if (err) {
1196 3efd8e31 2022-10-23 thomas if (err->code == GOT_ERR_EOF)
1197 3efd8e31 2022-10-23 thomas err = NULL;
1203 3efd8e31 2022-10-23 thomas close(packfd);
1204 3efd8e31 2022-10-23 thomas return err;
1207 3efd8e31 2022-10-23 thomas static const struct got_error *
1208 3efd8e31 2022-10-23 thomas report_unpack_status(struct imsg *imsg, int outfd, int chattygot)
1210 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1211 3efd8e31 2022-10-23 thomas struct gotd_imsg_packfile_status istatus;
1212 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1213 3efd8e31 2022-10-23 thomas size_t datalen, len;
1214 3efd8e31 2022-10-23 thomas char *reason = NULL;
1216 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1217 3efd8e31 2022-10-23 thomas if (datalen < sizeof(istatus))
1218 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1219 3efd8e31 2022-10-23 thomas memcpy(&istatus, imsg->data, sizeof(istatus));
1220 3efd8e31 2022-10-23 thomas if (datalen != sizeof(istatus) + istatus.reason_len)
1221 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1223 3efd8e31 2022-10-23 thomas reason = malloc(istatus.reason_len + 1);
1224 3efd8e31 2022-10-23 thomas if (reason == NULL) {
1225 3efd8e31 2022-10-23 thomas err = got_error_from_errno("malloc");
1226 3efd8e31 2022-10-23 thomas goto done;
1228 3efd8e31 2022-10-23 thomas memcpy(reason, imsg->data + sizeof(istatus), istatus.reason_len);
1229 3efd8e31 2022-10-23 thomas reason[istatus.reason_len] = '\0';
1231 3efd8e31 2022-10-23 thomas if (err == NULL)
1232 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "unpack ok\n");
1234 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "unpack %s\n", reason);
1235 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf)) {
1236 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_NO_SPACE);
1237 3efd8e31 2022-10-23 thomas goto done;
1240 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, len, chattygot);
1242 3efd8e31 2022-10-23 thomas free(reason);
1243 3efd8e31 2022-10-23 thomas return err;
1246 3efd8e31 2022-10-23 thomas static const struct got_error *
1247 3efd8e31 2022-10-23 thomas recv_ref_update_ok(struct imsg *imsg, int outfd, int chattygot)
1249 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1250 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ok iok;
1251 3efd8e31 2022-10-23 thomas size_t datalen, len;
1252 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1253 3efd8e31 2022-10-23 thomas char *refname = NULL;
1255 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1256 3efd8e31 2022-10-23 thomas if (datalen < sizeof(iok))
1257 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1258 3efd8e31 2022-10-23 thomas memcpy(&iok, imsg->data, sizeof(iok));
1259 3efd8e31 2022-10-23 thomas if (datalen != sizeof(iok) + iok.name_len)
1260 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1262 3efd8e31 2022-10-23 thomas memcpy(&iok, imsg->data, sizeof(iok));
1264 3efd8e31 2022-10-23 thomas refname = malloc(iok.name_len + 1);
1265 3efd8e31 2022-10-23 thomas if (refname == NULL)
1266 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
1267 3efd8e31 2022-10-23 thomas memcpy(refname, imsg->data + sizeof(iok), iok.name_len);
1268 3efd8e31 2022-10-23 thomas refname[iok.name_len] = '\0';
1270 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "ok %s\n", refname);
1271 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf)) {
1272 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_NO_SPACE);
1273 3efd8e31 2022-10-23 thomas goto done;
1276 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, len, chattygot);
1278 3efd8e31 2022-10-23 thomas free(refname);
1279 3efd8e31 2022-10-23 thomas return err;
1282 3efd8e31 2022-10-23 thomas static const struct got_error *
1283 3efd8e31 2022-10-23 thomas recv_ref_update_ng(struct imsg *imsg, int outfd, int chattygot)
1285 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1286 3efd8e31 2022-10-23 thomas struct gotd_imsg_ref_update_ng ing;
1287 3efd8e31 2022-10-23 thomas size_t datalen, len;
1288 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1289 3efd8e31 2022-10-23 thomas char *refname = NULL, *reason = NULL;
1291 3efd8e31 2022-10-23 thomas datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1292 3efd8e31 2022-10-23 thomas if (datalen < sizeof(ing))
1293 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1294 3efd8e31 2022-10-23 thomas memcpy(&ing, imsg->data, sizeof(ing));
1295 3efd8e31 2022-10-23 thomas if (datalen != sizeof(ing) + ing.name_len + ing.reason_len)
1296 3efd8e31 2022-10-23 thomas return got_error(GOT_ERR_PRIVSEP_LEN);
1298 3efd8e31 2022-10-23 thomas memcpy(&ing, imsg->data, sizeof(ing));
1300 3efd8e31 2022-10-23 thomas refname = malloc(ing.name_len + 1);
1301 3efd8e31 2022-10-23 thomas if (refname == NULL)
1302 3efd8e31 2022-10-23 thomas return got_error_from_errno("malloc");
1303 3efd8e31 2022-10-23 thomas memcpy(refname, imsg->data + sizeof(ing), ing.name_len);
1304 3efd8e31 2022-10-23 thomas refname[ing.name_len] = '\0';
1306 3efd8e31 2022-10-23 thomas reason = malloc(ing.reason_len + 1);
1307 3efd8e31 2022-10-23 thomas if (reason == NULL) {
1308 3efd8e31 2022-10-23 thomas err = got_error_from_errno("malloc");
1309 3efd8e31 2022-10-23 thomas goto done;
1311 3efd8e31 2022-10-23 thomas memcpy(refname, imsg->data + sizeof(ing) + ing.name_len,
1312 3efd8e31 2022-10-23 thomas ing.reason_len);
1313 3efd8e31 2022-10-23 thomas refname[ing.reason_len] = '\0';
1315 3efd8e31 2022-10-23 thomas len = snprintf(buf, sizeof(buf), "ng %s %s\n", refname, reason);
1316 3efd8e31 2022-10-23 thomas if (len >= sizeof(buf)) {
1317 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_NO_SPACE);
1318 3efd8e31 2022-10-23 thomas goto done;
1321 3efd8e31 2022-10-23 thomas err = got_pkt_writepkt(outfd, buf, len, chattygot);
1323 3efd8e31 2022-10-23 thomas free(refname);
1324 3efd8e31 2022-10-23 thomas free(reason);
1325 3efd8e31 2022-10-23 thomas return err;
1328 3efd8e31 2022-10-23 thomas static const struct got_error *
1329 3efd8e31 2022-10-23 thomas serve_write(int infd, int outfd, int gotd_sock, const char *repo_path,
1330 3efd8e31 2022-10-23 thomas int chattygot)
1332 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1333 3efd8e31 2022-10-23 thomas char buf[GOT_PKT_MAX];
1334 3efd8e31 2022-10-23 thomas struct imsgbuf ibuf;
1335 3efd8e31 2022-10-23 thomas enum protostate {
1336 3efd8e31 2022-10-23 thomas STATE_EXPECT_REF_UPDATE,
1337 3efd8e31 2022-10-23 thomas STATE_EXPECT_MORE_REF_UPDATES,
1338 3efd8e31 2022-10-23 thomas STATE_EXPECT_PACKFILE,
1339 3efd8e31 2022-10-23 thomas STATE_PACKFILE_RECEIVED,
1340 3efd8e31 2022-10-23 thomas STATE_REFS_UPDATED,
1342 3efd8e31 2022-10-23 thomas enum protostate curstate = STATE_EXPECT_REF_UPDATE;
1343 3efd8e31 2022-10-23 thomas struct imsg imsg;
1344 3efd8e31 2022-10-23 thomas int report_status = 0;
1346 3efd8e31 2022-10-23 thomas imsg_init(&ibuf, gotd_sock);
1347 3efd8e31 2022-10-23 thomas memset(&imsg, 0, sizeof(imsg));
1349 3efd8e31 2022-10-23 thomas err = announce_refs(outfd, &ibuf, 0, repo_path, chattygot);
1350 3efd8e31 2022-10-23 thomas if (err)
1351 3efd8e31 2022-10-23 thomas goto done;
1353 3efd8e31 2022-10-23 thomas while (curstate != STATE_EXPECT_PACKFILE) {
1355 3efd8e31 2022-10-23 thomas buf[0] = '\0';
1356 3efd8e31 2022-10-23 thomas err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot);
1357 3efd8e31 2022-10-23 thomas if (err)
1359 3efd8e31 2022-10-23 thomas if (n == 0) {
1360 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1361 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1362 3efd8e31 2022-10-23 thomas "unexpected flush packet received");
1363 3efd8e31 2022-10-23 thomas goto done;
1365 3efd8e31 2022-10-23 thomas err = forward_flushpkt(&ibuf);
1366 3efd8e31 2022-10-23 thomas if (err)
1367 3efd8e31 2022-10-23 thomas goto done;
1368 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_PACKFILE;
1369 3efd8e31 2022-10-23 thomas } else if (n >= (SHA1_DIGEST_STRING_LENGTH * 2) + 2) {
1370 3efd8e31 2022-10-23 thomas if (curstate != STATE_EXPECT_REF_UPDATE &&
1371 3efd8e31 2022-10-23 thomas curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1372 3efd8e31 2022-10-23 thomas err = got_error_msg(GOT_ERR_BAD_PACKET,
1373 3efd8e31 2022-10-23 thomas "unexpected ref-update packet");
1374 3efd8e31 2022-10-23 thomas goto done;
1376 3efd8e31 2022-10-23 thomas if (curstate == STATE_EXPECT_REF_UPDATE) {
1377 3efd8e31 2022-10-23 thomas err = recv_ref_update(&report_status,
1378 3efd8e31 2022-10-23 thomas outfd, &ibuf, buf, n, 1, chattygot);
1379 3efd8e31 2022-10-23 thomas } else {
1380 3efd8e31 2022-10-23 thomas err = recv_ref_update(NULL, outfd, &ibuf,
1381 3efd8e31 2022-10-23 thomas buf, n, 0, chattygot);
1383 3efd8e31 2022-10-23 thomas if (err)
1384 3efd8e31 2022-10-23 thomas goto done;
1385 3efd8e31 2022-10-23 thomas curstate = STATE_EXPECT_MORE_REF_UPDATES;
1386 3efd8e31 2022-10-23 thomas } else {
1387 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_BAD_PACKET);
1388 3efd8e31 2022-10-23 thomas goto done;
1392 3efd8e31 2022-10-23 thomas while (curstate != STATE_PACKFILE_RECEIVED) {
1393 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1394 3efd8e31 2022-10-23 thomas if (err)
1395 3efd8e31 2022-10-23 thomas goto done;
1396 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1397 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1398 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
1399 3efd8e31 2022-10-23 thomas goto done;
1400 3efd8e31 2022-10-23 thomas case GOTD_IMSG_RECV_PACKFILE:
1401 3efd8e31 2022-10-23 thomas err = recv_packfile(&imsg, infd);
1402 3efd8e31 2022-10-23 thomas if (err) {
1403 3efd8e31 2022-10-23 thomas if (err->code != GOT_ERR_EOF)
1404 3efd8e31 2022-10-23 thomas goto done;
1406 3efd8e31 2022-10-23 thomas * EOF is reported when the client hangs up,
1407 3efd8e31 2022-10-23 thomas * which can happen with Git clients.
1408 3efd8e31 2022-10-23 thomas * The socket should stay half-open so we
1409 3efd8e31 2022-10-23 thomas * can still send our reports if requested.
1411 3efd8e31 2022-10-23 thomas err = NULL;
1413 3efd8e31 2022-10-23 thomas curstate = STATE_PACKFILE_RECEIVED;
1415 3efd8e31 2022-10-23 thomas default:
1416 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1420 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1421 3efd8e31 2022-10-23 thomas if (err)
1422 3efd8e31 2022-10-23 thomas goto done;
1425 3efd8e31 2022-10-23 thomas while (curstate != STATE_REFS_UPDATED && err == NULL) {
1426 3efd8e31 2022-10-23 thomas err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1427 3efd8e31 2022-10-23 thomas if (err)
1429 3efd8e31 2022-10-23 thomas switch (imsg.hdr.type) {
1430 3efd8e31 2022-10-23 thomas case GOTD_IMSG_ERROR:
1431 3efd8e31 2022-10-23 thomas err = gotd_imsg_recv_error(NULL, &imsg);
1433 3efd8e31 2022-10-23 thomas case GOTD_IMSG_PACKFILE_STATUS:
1434 3efd8e31 2022-10-23 thomas if (!report_status)
1436 3efd8e31 2022-10-23 thomas err = report_unpack_status(&imsg, outfd, chattygot);
1438 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE_OK:
1439 3efd8e31 2022-10-23 thomas if (!report_status)
1441 3efd8e31 2022-10-23 thomas err = recv_ref_update_ok(&imsg, outfd, chattygot);
1443 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REF_UPDATE_NG:
1444 3efd8e31 2022-10-23 thomas if (!report_status)
1446 3efd8e31 2022-10-23 thomas err = recv_ref_update_ng(&imsg, outfd, chattygot);
1448 3efd8e31 2022-10-23 thomas case GOTD_IMSG_REFS_UPDATED:
1449 3efd8e31 2022-10-23 thomas curstate = STATE_REFS_UPDATED;
1450 3efd8e31 2022-10-23 thomas err = got_pkt_flushpkt(outfd, chattygot);
1452 3efd8e31 2022-10-23 thomas default:
1453 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_PRIVSEP_MSG);
1457 3efd8e31 2022-10-23 thomas imsg_free(&imsg);
1460 3efd8e31 2022-10-23 thomas imsg_clear(&ibuf);
1461 3efd8e31 2022-10-23 thomas if (err)
1462 3efd8e31 2022-10-23 thomas echo_error(err, outfd, chattygot);
1463 3efd8e31 2022-10-23 thomas return err;
1466 3efd8e31 2022-10-23 thomas const struct got_error *
1467 3efd8e31 2022-10-23 thomas got_serve(int infd, int outfd, const char *gitcmd, int gotd_sock, int chattygot)
1469 3efd8e31 2022-10-23 thomas const struct got_error *err = NULL;
1470 3efd8e31 2022-10-23 thomas char *command = NULL, *repo_path = NULL;
1472 3efd8e31 2022-10-23 thomas err = parse_command(&command, &repo_path, gitcmd);
1473 3efd8e31 2022-10-23 thomas if (err)
1474 3efd8e31 2022-10-23 thomas return err;
1476 3efd8e31 2022-10-23 thomas if (strcmp(command, GOT_SERVE_CMD_FETCH) == 0)
1477 3efd8e31 2022-10-23 thomas err = serve_read(infd, outfd, gotd_sock, repo_path, chattygot);
1478 3efd8e31 2022-10-23 thomas else if (strcmp(command, GOT_SERVE_CMD_SEND) == 0)
1479 3efd8e31 2022-10-23 thomas err = serve_write(infd, outfd, gotd_sock, repo_path, chattygot);
1481 3efd8e31 2022-10-23 thomas err = got_error(GOT_ERR_BAD_PACKET);
1483 3efd8e31 2022-10-23 thomas free(command);
1484 3efd8e31 2022-10-23 thomas free(repo_path);
1485 3efd8e31 2022-10-23 thomas return err;
