2 * Copyright (c) 2022 Stefan Sperling <stsp@openbsd.org>
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 #include <sys/types.h>
18 #include <sys/queue.h>
34 #include "got_error.h"
35 #include "got_serve.h"
37 #include "got_version.h"
38 #include "got_reference.h"
39 #include "got_object.h"
41 #include "got_lib_pkt.h"
42 #include "got_lib_dial.h"
43 #include "got_lib_gitproto.h"
44 #include "got_lib_hash.h"
45 #include "got_lib_poll.h"
50 #define nitems(_a) (sizeof((_a)) / sizeof((_a)[0]))
54 * Number of seconds until we give up trying to read more
55 * data from the client connection.
57 static const int timeout = 60;
59 static const struct got_capability read_capabilities[] = {
60 { GOT_CAPA_AGENT, "got/" GOT_VERSION_STR },
61 { GOT_CAPA_OFS_DELTA, NULL },
62 { GOT_CAPA_SIDE_BAND_64K, NULL },
65 static const struct got_capability write_capabilities[] = {
66 { GOT_CAPA_AGENT, "got/" GOT_VERSION_STR },
67 { GOT_CAPA_OFS_DELTA, NULL },
68 { GOT_CAPA_REPORT_STATUS, NULL },
69 { GOT_CAPA_NO_THIN, NULL },
70 { GOT_CAPA_DELETE_REFS, NULL },
73 static const struct got_error *
74 append_read_capabilities(size_t *capalen, size_t len, const char *symrefstr,
75 uint8_t *buf, size_t bufsize)
77 struct got_capability capa[nitems(read_capabilities) + 1];
80 memcpy(&capa, read_capabilities, sizeof(read_capabilities));
82 capa[nitems(read_capabilities)].key = "symref";
83 capa[nitems(read_capabilities)].value = symrefstr;
86 ncapa = nitems(read_capabilities);
88 return got_gitproto_append_capabilities(capalen, buf, len,
89 bufsize, capa, ncapa);
92 static const struct got_error *
93 send_ref(int outfd, uint8_t *id, const char *refname, int send_capabilities,
94 int client_is_reading, const char *symrefstr, int chattygot)
96 const struct got_error *err = NULL;
97 char hex[SHA1_DIGEST_STRING_LENGTH];
98 char buf[GOT_PKT_MAX];
99 size_t len, capalen = 0;
101 if (got_sha1_digest_to_str(id, hex, sizeof(hex)) == NULL)
102 return got_error(GOT_ERR_BAD_OBJ_ID);
104 len = snprintf(buf, sizeof(buf), "%s %s", hex, refname);
105 if (len >= sizeof(buf))
106 return got_error(GOT_ERR_NO_SPACE);
108 if (send_capabilities) {
109 if (client_is_reading) {
110 err = append_read_capabilities(&capalen, len,
111 symrefstr, buf, sizeof(buf));
113 err = got_gitproto_append_capabilities(&capalen,
114 buf, len, sizeof(buf), write_capabilities,
115 nitems(write_capabilities));
122 if (len + 1 >= sizeof(buf))
123 return got_error(GOT_ERR_NO_SPACE);
128 return got_pkt_writepkt(outfd, buf, len, chattygot);
131 static const struct got_error *
132 send_zero_refs(int outfd, int client_is_reading, int chattygot)
134 const struct got_error *err = NULL;
135 const char *line = GOT_SHA1_STRING_ZERO " capabilities^{}";
136 char buf[GOT_PKT_MAX];
137 size_t len, capalen = 0;
139 len = strlcpy(buf, line, sizeof(buf));
140 if (len >= sizeof(buf))
141 return got_error(GOT_ERR_NO_SPACE);
143 if (client_is_reading) {
144 err = got_gitproto_append_capabilities(&capalen, buf, len,
145 sizeof(buf), read_capabilities, nitems(read_capabilities));
149 err = got_gitproto_append_capabilities(&capalen, buf, len,
150 sizeof(buf), write_capabilities,
151 nitems(write_capabilities));
156 return got_pkt_writepkt(outfd, buf, len + capalen, chattygot);
160 echo_error(const struct got_error *err, int outfd, int chattygot)
162 char buf[4 + GOT_ERR_MAX_MSG_SIZE];
166 * Echo the error to the client on a pkt-line.
167 * The client should then terminate its session.
169 buf[0] = 'E'; buf[1] = 'R'; buf[2] = 'R'; buf[3] = ' '; buf[4] = '\0';
170 len = strlcat(buf, err->msg, sizeof(buf));
171 got_pkt_writepkt(outfd, buf, len, chattygot);
174 static const struct got_error *
175 announce_refs(int outfd, struct imsgbuf *ibuf, int client_is_reading,
176 const char *repo_path, int chattygot)
178 const struct got_error *err = NULL;
181 struct gotd_imsg_list_refs lsref;
182 struct gotd_imsg_reflist ireflist;
183 struct gotd_imsg_ref iref;
184 struct gotd_imsg_symref isymref;
186 int have_nrefs = 0, sent_capabilities = 0;
187 char *symrefname = NULL, *symreftarget = NULL, *symrefstr = NULL;
188 char *refname = NULL;
190 memset(&imsg, 0, sizeof(imsg));
191 memset(&lsref, 0, sizeof(lsref));
193 if (strlcpy(lsref.repo_name, repo_path, sizeof(lsref.repo_name)) >=
194 sizeof(lsref.repo_name))
195 return got_error(GOT_ERR_NO_SPACE);
196 lsref.client_is_reading = client_is_reading;
198 if (imsg_compose(ibuf, GOTD_IMSG_LIST_REFS, 0, 0, -1,
199 &lsref, sizeof(lsref)) == -1)
200 return got_error_from_errno("imsg_compose LIST_REFS");
202 err = gotd_imsg_flush(ibuf);
206 while (!have_nrefs || nrefs > 0) {
207 err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
210 datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
211 switch (imsg.hdr.type) {
212 case GOTD_IMSG_ERROR:
213 err = gotd_imsg_recv_error(NULL, &imsg);
215 case GOTD_IMSG_REFLIST:
216 if (have_nrefs || nrefs > 0) {
217 err = got_error(GOT_ERR_PRIVSEP_MSG);
220 if (datalen != sizeof(ireflist)) {
221 err = got_error(GOT_ERR_PRIVSEP_MSG);
224 memcpy(&ireflist, imsg.data, sizeof(ireflist));
225 nrefs = ireflist.nrefs;
228 err = send_zero_refs(outfd, client_is_reading,
232 if (!have_nrefs || nrefs == 0) {
233 err = got_error(GOT_ERR_PRIVSEP_MSG);
236 if (datalen < sizeof(iref)) {
237 err = got_error(GOT_ERR_PRIVSEP_MSG);
240 memcpy(&iref, imsg.data, sizeof(iref));
241 if (datalen != sizeof(iref) + iref.name_len) {
242 err = got_error(GOT_ERR_PRIVSEP_LEN);
245 refname = strndup(imsg.data + sizeof(iref),
247 if (refname == NULL) {
248 err = got_error_from_errno("strndup");
251 err = send_ref(outfd, iref.id, refname,
252 !sent_capabilities, client_is_reading,
258 sent_capabilities = 1;
262 case GOTD_IMSG_SYMREF:
263 if (!have_nrefs || nrefs == 0) {
264 err = got_error(GOT_ERR_PRIVSEP_MSG);
267 if (datalen < sizeof(isymref)) {
268 err = got_error(GOT_ERR_PRIVSEP_LEN);
271 memcpy(&isymref, imsg.data, sizeof(isymref));
272 if (datalen != sizeof(isymref) + isymref.name_len +
273 isymref.target_len) {
274 err = got_error(GOT_ERR_PRIVSEP_LEN);
279 * For now, we only announce one symbolic ref,
280 * as part of our capability advertisement.
282 if (sent_capabilities || symrefstr != NULL ||
283 symrefname != NULL || symreftarget != NULL)
286 symrefname = strndup(imsg.data + sizeof(isymref),
288 if (symrefname == NULL) {
289 err = got_error_from_errno("malloc");
293 symreftarget = strndup(
294 imsg.data + sizeof(isymref) + isymref.name_len,
296 if (symreftarget == NULL) {
297 err = got_error_from_errno("strndup");
301 if (asprintf(&symrefstr, "%s:%s", symrefname,
302 symreftarget) == -1) {
303 err = got_error_from_errno("asprintf");
306 err = send_ref(outfd, isymref.target_id, symrefname,
307 !sent_capabilities, client_is_reading, symrefstr,
313 sent_capabilities = 1;
318 err = got_error(GOT_ERR_PRIVSEP_MSG);
325 err = got_pkt_flushpkt(outfd, chattygot);
335 static const struct got_error *
336 parse_want_line(char **common_capabilities, uint8_t *id, char *buf, size_t len)
338 const struct got_error *err;
339 char *id_str = NULL, *client_capabilities = NULL;
341 err = got_gitproto_parse_want_line(&id_str,
342 &client_capabilities, buf, len);
346 if (!got_parse_hash_digest(id, id_str, GOT_HASH_SHA1)) {
347 err = got_error_msg(GOT_ERR_BAD_PACKET,
348 "want-line with bad object ID");
352 if (client_capabilities) {
353 err = got_gitproto_match_capabilities(common_capabilities,
354 NULL, client_capabilities, read_capabilities,
355 nitems(read_capabilities));
361 free(client_capabilities);
365 static const struct got_error *
366 parse_have_line(uint8_t *id, char *buf, size_t len)
368 const struct got_error *err;
371 err = got_gitproto_parse_have_line(&id_str, buf, len);
375 if (!got_parse_hash_digest(id, id_str, GOT_HASH_SHA1)) {
376 err = got_error_msg(GOT_ERR_BAD_PACKET,
377 "have-line with bad object ID");
385 static const struct got_error *
386 send_capability(struct got_capability *capa, struct imsgbuf *ibuf)
388 const struct got_error *err = NULL;
389 struct gotd_imsg_capability icapa;
393 memset(&icapa, 0, sizeof(icapa));
395 icapa.key_len = strlen(capa->key);
396 len = sizeof(icapa) + icapa.key_len;
398 icapa.value_len = strlen(capa->value);
399 len += icapa.value_len;
402 wbuf = imsg_create(ibuf, GOTD_IMSG_CAPABILITY, 0, 0, len);
404 err = got_error_from_errno("imsg_create CAPABILITY");
408 if (imsg_add(wbuf, &icapa, sizeof(icapa)) == -1)
409 return got_error_from_errno("imsg_add CAPABILITY");
410 if (imsg_add(wbuf, capa->key, icapa.key_len) == -1)
411 return got_error_from_errno("imsg_add CAPABILITY");
413 if (imsg_add(wbuf, capa->value, icapa.value_len) == -1)
414 return got_error_from_errno("imsg_add CAPABILITY");
417 imsg_close(ibuf, wbuf);
422 static const struct got_error *
423 send_capabilities(int *use_sidebands, int *report_status,
424 char *capabilities_str, struct imsgbuf *ibuf)
426 const struct got_error *err = NULL;
427 struct gotd_imsg_capabilities icapas;
428 struct got_capability *capa = NULL;
431 err = got_gitproto_split_capabilities_str(&capa, &ncapa,
436 icapas.ncapabilities = ncapa;
437 if (imsg_compose(ibuf, GOTD_IMSG_CAPABILITIES, 0, 0, -1,
438 &icapas, sizeof(icapas)) == -1) {
439 err = got_error_from_errno("imsg_compose IMSG_CAPABILITIES");
443 for (i = 0; i < ncapa; i++) {
444 err = send_capability(&capa[i], ibuf);
448 strcmp(capa[i].key, GOT_CAPA_SIDE_BAND_64K) == 0)
451 strcmp(capa[i].key, GOT_CAPA_REPORT_STATUS) == 0)
459 static const struct got_error *
460 forward_flushpkt(struct imsgbuf *ibuf)
462 if (imsg_compose(ibuf, GOTD_IMSG_FLUSH, 0, 0, -1, NULL, 0) == -1)
463 return got_error_from_errno("imsg_compose FLUSH");
465 return gotd_imsg_flush(ibuf);
468 static const struct got_error *
469 recv_ack(struct imsg *imsg, uint8_t *expected_id)
471 struct gotd_imsg_ack iack;
474 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
475 if (datalen != sizeof(iack))
476 return got_error(GOT_ERR_PRIVSEP_LEN);
478 memcpy(&iack, imsg->data, sizeof(iack));
479 if (memcmp(iack.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
480 return got_error(GOT_ERR_BAD_OBJ_ID);
485 static const struct got_error *
486 recv_nak(struct imsg *imsg, uint8_t *expected_id)
488 struct gotd_imsg_ack inak;
491 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
492 if (datalen != sizeof(inak))
493 return got_error(GOT_ERR_PRIVSEP_LEN);
495 memcpy(&inak, imsg->data, sizeof(inak));
496 if (memcmp(inak.object_id, expected_id, SHA1_DIGEST_LENGTH) != 0)
497 return got_error(GOT_ERR_BAD_OBJ_ID);
503 static const struct got_error *
504 recv_want(int *use_sidebands, int outfd, struct imsgbuf *ibuf,
505 char *buf, size_t len, int expect_capabilities, int chattygot)
507 const struct got_error *err;
508 struct gotd_imsg_want iwant;
509 char *capabilities_str;
513 memset(&iwant, 0, sizeof(iwant));
514 memset(&imsg, 0, sizeof(imsg));
516 err = parse_want_line(&capabilities_str, iwant.object_id, buf, len);
520 if (capabilities_str) {
521 if (!expect_capabilities) {
522 err = got_error_msg(GOT_ERR_BAD_PACKET,
523 "unexpected capability announcement received");
526 err = send_capabilities(use_sidebands, NULL, capabilities_str,
533 if (imsg_compose(ibuf, GOTD_IMSG_WANT, 0, 0, -1,
534 &iwant, sizeof(iwant)) == -1) {
535 err = got_error_from_errno("imsg_compose WANT");
539 err = gotd_imsg_flush(ibuf);
544 * Wait for an ACK, or an error in case the desired object
547 while (!done && err == NULL) {
548 err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
551 switch (imsg.hdr.type) {
552 case GOTD_IMSG_ERROR:
553 err = gotd_imsg_recv_error(NULL, &imsg);
556 err = recv_ack(&imsg, iwant.object_id);
562 err = got_error(GOT_ERR_PRIVSEP_MSG);
569 free(capabilities_str);
573 static const struct got_error *
574 send_ack(int outfd, uint8_t *id, int chattygot)
576 char hex[SHA1_DIGEST_STRING_LENGTH];
577 char buf[GOT_PKT_MAX];
580 if (got_sha1_digest_to_str(id, hex, sizeof(hex)) == NULL)
581 return got_error(GOT_ERR_BAD_OBJ_ID);
583 len = snprintf(buf, sizeof(buf), "ACK %s\n", hex);
584 if (len >= sizeof(buf))
585 return got_error(GOT_ERR_NO_SPACE);
587 return got_pkt_writepkt(outfd, buf, len, chattygot);
590 static const struct got_error *
591 send_nak(int outfd, int chattygot)
596 len = snprintf(buf, sizeof(buf), "NAK\n");
597 if (len >= sizeof(buf))
598 return got_error(GOT_ERR_NO_SPACE);
600 return got_pkt_writepkt(outfd, buf, len, chattygot);
603 static const struct got_error *
604 recv_have(int *have_ack, int outfd, struct imsgbuf *ibuf, char *buf,
605 size_t len, int chattygot)
607 const struct got_error *err;
608 struct gotd_imsg_have ihave;
612 memset(&ihave, 0, sizeof(ihave));
613 memset(&imsg, 0, sizeof(imsg));
615 err = parse_have_line(ihave.object_id, buf, len);
619 if (imsg_compose(ibuf, GOTD_IMSG_HAVE, 0, 0, -1,
620 &ihave, sizeof(ihave)) == -1)
621 return got_error_from_errno("imsg_compose HAVE");
623 err = gotd_imsg_flush(ibuf);
628 * Wait for an ACK or a NAK, indicating whether a common
629 * commit object has been found.
631 while (!done && err == NULL) {
632 err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
635 switch (imsg.hdr.type) {
636 case GOTD_IMSG_ERROR:
637 err = gotd_imsg_recv_error(NULL, &imsg);
640 err = recv_ack(&imsg, ihave.object_id);
644 err = send_ack(outfd, ihave.object_id,
653 err = recv_nak(&imsg, ihave.object_id);
659 err = got_error(GOT_ERR_PRIVSEP_MSG);
669 static const struct got_error *
670 recv_done(int *packfd, int outfd, struct imsgbuf *ibuf, int chattygot)
672 const struct got_error *err;
678 if (imsg_compose(ibuf, GOTD_IMSG_DONE, 0, 0, -1, NULL, 0) == -1)
679 return got_error_from_errno("imsg_compose DONE");
681 err = gotd_imsg_flush(ibuf);
685 while (*packfd == -1 && err == NULL) {
686 err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
690 switch (imsg.hdr.type) {
691 case GOTD_IMSG_ERROR:
692 err = gotd_imsg_recv_error(NULL, &imsg);
694 case GOTD_IMSG_PACKFILE_PIPE:
695 fd = imsg_get_fd(&imsg);
699 err = got_error(GOT_ERR_PRIVSEP_NO_FD);
702 err = got_error(GOT_ERR_PRIVSEP_MSG);
712 static const struct got_error *
713 relay_progress_reports(struct imsgbuf *ibuf, int outfd, int chattygot)
715 const struct got_error *err = NULL;
716 int pack_starting = 0;
717 struct gotd_imsg_packfile_progress iprog;
718 char buf[GOT_PKT_MAX];
721 int p_deltify = 0, n;
722 const char *eol = "\r";
724 memset(&imsg, 0, sizeof(imsg));
726 while (!pack_starting && err == NULL) {
727 err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
731 datalen = imsg.hdr.len - IMSG_HEADER_SIZE;
732 switch (imsg.hdr.type) {
733 case GOTD_IMSG_ERROR:
734 err = gotd_imsg_recv_error(NULL, &imsg);
736 case GOTD_IMSG_PACKFILE_READY:
740 case GOTD_IMSG_PACKFILE_PROGRESS:
741 if (datalen != sizeof(iprog)) {
742 err = got_error(GOT_ERR_PRIVSEP_LEN);
745 memcpy(&iprog, imsg.data, sizeof(iprog));
746 if (iprog.nobj_total > 0) {
747 p_deltify = (iprog.nobj_deltify * 100) /
750 buf[0] = GOT_SIDEBAND_PROGRESS_INFO;
751 n = snprintf(&buf[1], sizeof(buf) - 1,
752 "%d commits colored, "
758 if (n >= sizeof(buf) - 1)
760 err = got_pkt_writepkt(outfd, buf, 1 + n, chattygot);
763 err = got_error(GOT_ERR_PRIVSEP_MSG);
773 static const struct got_error *
774 serve_read(int infd, int outfd, int gotd_sock, const char *repo_path,
777 const struct got_error *err = NULL;
778 char buf[GOT_PKT_MAX];
782 STATE_EXPECT_MORE_WANT,
783 STATE_EXPECT_HAVE_OR_DONE,
786 enum protostate curstate = STATE_EXPECT_WANT;
787 int have_ack = 0, use_sidebands = 0, seen_have = 0;
789 size_t pack_chunksize;
791 imsg_init(&ibuf, gotd_sock);
793 err = announce_refs(outfd, &ibuf, 1, repo_path, chattygot);
797 while (curstate != STATE_DONE) {
800 err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot,
805 if (curstate != STATE_EXPECT_WANT &&
806 curstate != STATE_EXPECT_MORE_WANT &&
807 curstate != STATE_EXPECT_HAVE_OR_DONE) {
808 err = got_error_msg(GOT_ERR_BAD_PACKET,
809 "unexpected flush packet received");
813 if (curstate == STATE_EXPECT_WANT) {
816 * If the client does not want to fetch
817 * anything we should receive a flush
818 * packet followed by EOF.
820 r = read(infd, buf, sizeof(buf));
822 err = got_error_from_errno("read");
825 if (r == 0) /* EOF */
828 /* Zero-length field followed by payload. */
829 err = got_error_msg(GOT_ERR_BAD_PACKET,
830 "unexpected flush packet received");
834 if (curstate == STATE_EXPECT_WANT ||
835 curstate == STATE_EXPECT_MORE_WANT ||
836 curstate == STATE_EXPECT_HAVE_OR_DONE) {
837 err = forward_flushpkt(&ibuf);
841 if (curstate == STATE_EXPECT_HAVE_OR_DONE &&
843 err = send_nak(outfd, chattygot);
847 if (curstate == STATE_EXPECT_MORE_WANT)
848 curstate = STATE_EXPECT_HAVE_OR_DONE;
849 } else if (n >= 5 && strncmp(buf, "want ", 5) == 0) {
850 if (curstate != STATE_EXPECT_WANT &&
851 curstate != STATE_EXPECT_MORE_WANT) {
852 err = got_error_msg(GOT_ERR_BAD_PACKET,
853 "unexpected 'want' packet");
856 err = recv_want(&use_sidebands, outfd, &ibuf, buf, n,
857 curstate == STATE_EXPECT_WANT ? 1 : 0, chattygot);
860 if (curstate == STATE_EXPECT_WANT)
861 curstate = STATE_EXPECT_MORE_WANT;
862 } else if (n >= 5 && strncmp(buf, "have ", 5) == 0) {
863 if (curstate != STATE_EXPECT_HAVE_OR_DONE) {
864 err = got_error_msg(GOT_ERR_BAD_PACKET,
865 "unexpected 'have' packet");
868 err = recv_have(&have_ack, outfd, &ibuf,
873 } else if (n == 5 && strncmp(buf, "done\n", 5) == 0) {
874 if (curstate != STATE_EXPECT_HAVE_OR_DONE) {
875 err = got_error_msg(GOT_ERR_BAD_PACKET,
876 "unexpected 'done' packet");
879 err = recv_done(&packfd, outfd, &ibuf, chattygot);
882 curstate = STATE_DONE;
885 err = got_error(GOT_ERR_BAD_PACKET);
891 err = send_nak(outfd, chattygot);
897 err = relay_progress_reports(&ibuf, outfd, chattygot);
900 pack_chunksize = GOT_SIDEBAND_64K_PACKFILE_DATA_MAX;
902 pack_chunksize = sizeof(buf);
907 r = read(packfd, use_sidebands ? &buf[1] : buf,
910 err = got_error_from_errno("read");
913 err = got_pkt_flushpkt(outfd, chattygot);
918 buf[0] = GOT_SIDEBAND_PACKFILE_DATA;
919 err = got_pkt_writepkt(outfd, buf, 1 + r, chattygot);
923 err = got_poll_write_full(outfd, buf, r);
925 if (err->code == GOT_ERR_EOF)
933 if (packfd != -1 && close(packfd) == -1 && err == NULL)
934 err = got_error_from_errno("close");
936 echo_error(err, outfd, chattygot);
940 static const struct got_error *
941 parse_ref_update_line(char **common_capabilities, char **refname,
942 uint8_t *old_id, uint8_t *new_id, char *buf, size_t len)
944 const struct got_error *err;
945 char *old_id_str = NULL, *new_id_str = NULL;
946 char *client_capabilities = NULL;
950 err = got_gitproto_parse_ref_update_line(&old_id_str, &new_id_str,
951 refname, &client_capabilities, buf, len);
955 if (!got_parse_hash_digest(old_id, old_id_str, GOT_HASH_SHA1) ||
956 !got_parse_hash_digest(new_id, new_id_str, GOT_HASH_SHA1)) {
957 err = got_error_msg(GOT_ERR_BAD_PACKET,
958 "ref-update with bad object ID");
961 if (!got_ref_name_is_valid(*refname)) {
962 err = got_error_msg(GOT_ERR_BAD_PACKET,
963 "ref-update with bad reference name");
967 if (client_capabilities) {
968 err = got_gitproto_match_capabilities(common_capabilities,
969 NULL, client_capabilities, write_capabilities,
970 nitems(write_capabilities));
977 free(client_capabilities);
985 static const struct got_error *
986 recv_ref_update(int *report_status, int outfd, struct imsgbuf *ibuf,
987 char *buf, size_t len, int expect_capabilities, int chattygot)
989 const struct got_error *err;
990 struct gotd_imsg_ref_update iref;
992 char *capabilities_str = NULL, *refname = NULL;
996 memset(&iref, 0, sizeof(iref));
997 memset(&imsg, 0, sizeof(imsg));
999 err = parse_ref_update_line(&capabilities_str, &refname,
1000 iref.old_id, iref.new_id, buf, len);
1004 if (capabilities_str) {
1005 if (!expect_capabilities) {
1006 err = got_error_msg(GOT_ERR_BAD_PACKET,
1007 "unexpected capability announcement received");
1010 err = send_capabilities(NULL, report_status, capabilities_str,
1016 iref.name_len = strlen(refname);
1017 len = sizeof(iref) + iref.name_len;
1018 wbuf = imsg_create(ibuf, GOTD_IMSG_REF_UPDATE, 0, 0, len);
1020 err = got_error_from_errno("imsg_create REF_UPDATE");
1024 if (imsg_add(wbuf, &iref, sizeof(iref)) == -1)
1025 return got_error_from_errno("imsg_add REF_UPDATE");
1026 if (imsg_add(wbuf, refname, iref.name_len) == -1)
1027 return got_error_from_errno("imsg_add REF_UPDATE");
1028 imsg_close(ibuf, wbuf);
1030 err = gotd_imsg_flush(ibuf);
1034 /* Wait for ACK or an error. */
1035 while (!done && err == NULL) {
1036 err = gotd_imsg_poll_recv(&imsg, ibuf, 0);
1039 switch (imsg.hdr.type) {
1040 case GOTD_IMSG_ERROR:
1041 err = gotd_imsg_recv_error(NULL, &imsg);
1044 err = recv_ack(&imsg, iref.new_id);
1050 err = got_error(GOT_ERR_PRIVSEP_MSG);
1057 free(capabilities_str);
1062 static const struct got_error *
1063 recv_packfile(struct imsg *imsg, int infd)
1065 const struct got_error *err = NULL;
1068 char buf[GOT_PKT_MAX];
1071 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1073 return got_error(GOT_ERR_PRIVSEP_MSG);
1075 packfd = imsg_get_fd(imsg);
1077 return got_error(GOT_ERR_PRIVSEP_NO_FD);
1079 while (!pack_done) {
1082 err = got_poll_fd(infd, POLLIN, 1);
1084 if (err->code != GOT_ERR_TIMEOUT)
1088 r = read(infd, buf, sizeof(buf));
1090 err = got_error_from_errno("read");
1095 * Git clients hang up their side of the
1096 * connection after sending the pack file.
1105 /* Detect gotd(8) closing the pack pipe when done. */
1106 err = got_poll_fd(packfd, 0, 1);
1108 if (err->code != GOT_ERR_TIMEOUT &&
1109 err->code != GOT_ERR_EOF)
1111 if (err->code == GOT_ERR_EOF)
1116 /* Write pack data and/or detect pipe being closed. */
1117 err = got_poll_write_full(packfd, buf, r);
1119 if (err->code == GOT_ERR_EOF)
1130 static const struct got_error *
1131 report_unpack_status(struct imsg *imsg, int outfd, int chattygot)
1133 const struct got_error *err = NULL;
1134 struct gotd_imsg_packfile_status istatus;
1135 char buf[GOT_PKT_MAX];
1136 size_t datalen, len;
1137 char *reason = NULL;
1139 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1140 if (datalen < sizeof(istatus))
1141 return got_error(GOT_ERR_PRIVSEP_LEN);
1142 memcpy(&istatus, imsg->data, sizeof(istatus));
1143 if (datalen != sizeof(istatus) + istatus.reason_len)
1144 return got_error(GOT_ERR_PRIVSEP_LEN);
1146 reason = strndup(imsg->data + sizeof(istatus), istatus.reason_len);
1147 if (reason == NULL) {
1148 err = got_error_from_errno("strndup");
1153 len = snprintf(buf, sizeof(buf), "unpack ok\n");
1155 len = snprintf(buf, sizeof(buf), "unpack %s\n", reason);
1156 if (len >= sizeof(buf)) {
1157 err = got_error(GOT_ERR_NO_SPACE);
1161 err = got_pkt_writepkt(outfd, buf, len, chattygot);
1167 static const struct got_error *
1168 recv_ref_update_ok(struct imsg *imsg, int outfd, int chattygot)
1170 const struct got_error *err = NULL;
1171 struct gotd_imsg_ref_update_ok iok;
1172 size_t datalen, len;
1173 char buf[GOT_PKT_MAX];
1174 char *refname = NULL;
1176 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1177 if (datalen < sizeof(iok))
1178 return got_error(GOT_ERR_PRIVSEP_LEN);
1179 memcpy(&iok, imsg->data, sizeof(iok));
1180 if (datalen != sizeof(iok) + iok.name_len)
1181 return got_error(GOT_ERR_PRIVSEP_LEN);
1183 memcpy(&iok, imsg->data, sizeof(iok));
1185 refname = strndup(imsg->data + sizeof(iok), iok.name_len);
1186 if (refname == NULL)
1187 return got_error_from_errno("strndup");
1189 len = snprintf(buf, sizeof(buf), "ok %s\n", refname);
1190 if (len >= sizeof(buf)) {
1191 err = got_error(GOT_ERR_NO_SPACE);
1195 err = got_pkt_writepkt(outfd, buf, len, chattygot);
1201 static const struct got_error *
1202 recv_ref_update_ng(struct imsg *imsg, int outfd, int chattygot)
1204 const struct got_error *err = NULL;
1205 struct gotd_imsg_ref_update_ng ing;
1206 size_t datalen, len;
1207 char buf[GOT_PKT_MAX];
1208 char *refname = NULL, *reason = NULL;
1210 datalen = imsg->hdr.len - IMSG_HEADER_SIZE;
1211 if (datalen < sizeof(ing))
1212 return got_error(GOT_ERR_PRIVSEP_LEN);
1213 memcpy(&ing, imsg->data, sizeof(ing));
1214 if (datalen != sizeof(ing) + ing.name_len + ing.reason_len)
1215 return got_error(GOT_ERR_PRIVSEP_LEN);
1217 memcpy(&ing, imsg->data, sizeof(ing));
1219 refname = strndup(imsg->data + sizeof(ing), ing.name_len);
1220 if (refname == NULL)
1221 return got_error_from_errno("strndup");
1223 reason = strndup(imsg->data + sizeof(ing) + ing.name_len,
1225 if (reason == NULL) {
1226 err = got_error_from_errno("strndup");
1230 len = snprintf(buf, sizeof(buf), "ng %s %s\n", refname, reason);
1231 if (len >= sizeof(buf)) {
1232 err = got_error(GOT_ERR_NO_SPACE);
1236 err = got_pkt_writepkt(outfd, buf, len, chattygot);
1243 static const struct got_error *
1244 serve_write(int infd, int outfd, int gotd_sock, const char *repo_path,
1247 const struct got_error *err = NULL;
1248 char buf[GOT_PKT_MAX];
1249 struct imsgbuf ibuf;
1251 STATE_EXPECT_REF_UPDATE,
1252 STATE_EXPECT_MORE_REF_UPDATES,
1253 STATE_EXPECT_PACKFILE,
1254 STATE_PACKFILE_RECEIVED,
1257 enum protostate curstate = STATE_EXPECT_REF_UPDATE;
1259 int report_status = 0;
1261 imsg_init(&ibuf, gotd_sock);
1262 memset(&imsg, 0, sizeof(imsg));
1264 err = announce_refs(outfd, &ibuf, 0, repo_path, chattygot);
1268 while (curstate != STATE_EXPECT_PACKFILE) {
1271 err = got_pkt_readpkt(&n, infd, buf, sizeof(buf), chattygot,
1276 if (curstate == STATE_EXPECT_REF_UPDATE) {
1277 /* The client will not send us anything. */
1279 } else if (curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1280 err = got_error_msg(GOT_ERR_BAD_PACKET,
1281 "unexpected flush packet received");
1284 err = forward_flushpkt(&ibuf);
1287 curstate = STATE_EXPECT_PACKFILE;
1288 } else if (n >= (SHA1_DIGEST_STRING_LENGTH * 2) + 2) {
1289 if (curstate != STATE_EXPECT_REF_UPDATE &&
1290 curstate != STATE_EXPECT_MORE_REF_UPDATES) {
1291 err = got_error_msg(GOT_ERR_BAD_PACKET,
1292 "unexpected ref-update packet");
1295 if (curstate == STATE_EXPECT_REF_UPDATE) {
1296 err = recv_ref_update(&report_status,
1297 outfd, &ibuf, buf, n, 1, chattygot);
1299 err = recv_ref_update(NULL, outfd, &ibuf,
1300 buf, n, 0, chattygot);
1304 curstate = STATE_EXPECT_MORE_REF_UPDATES;
1306 err = got_error(GOT_ERR_BAD_PACKET);
1311 while (curstate != STATE_PACKFILE_RECEIVED) {
1312 err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1315 switch (imsg.hdr.type) {
1316 case GOTD_IMSG_ERROR:
1317 err = gotd_imsg_recv_error(NULL, &imsg);
1319 case GOTD_IMSG_PACKFILE_PIPE:
1320 err = recv_packfile(&imsg, infd);
1322 if (err->code != GOT_ERR_EOF)
1325 * EOF is reported when the client hangs up,
1326 * which can happen with Git clients.
1327 * The socket should stay half-open so we
1328 * can still send our reports if requested.
1332 curstate = STATE_PACKFILE_RECEIVED;
1335 err = got_error(GOT_ERR_PRIVSEP_MSG);
1344 while (curstate != STATE_REFS_UPDATED && err == NULL) {
1345 err = gotd_imsg_poll_recv(&imsg, &ibuf, 0);
1348 switch (imsg.hdr.type) {
1349 case GOTD_IMSG_ERROR:
1350 err = gotd_imsg_recv_error(NULL, &imsg);
1352 case GOTD_IMSG_PACKFILE_STATUS:
1355 err = report_unpack_status(&imsg, outfd, chattygot);
1357 case GOTD_IMSG_REF_UPDATE_OK:
1360 err = recv_ref_update_ok(&imsg, outfd, chattygot);
1362 case GOTD_IMSG_REF_UPDATE_NG:
1365 err = recv_ref_update_ng(&imsg, outfd, chattygot);
1367 case GOTD_IMSG_REFS_UPDATED:
1368 curstate = STATE_REFS_UPDATED;
1369 err = got_pkt_flushpkt(outfd, chattygot);
1372 err = got_error(GOT_ERR_PRIVSEP_MSG);
1381 echo_error(err, outfd, chattygot);
1385 const struct got_error *
1386 got_serve(int infd, int outfd, const char *command, const char *repo_path,
1387 int gotd_sock, int chattygot)
1389 const struct got_error *err = NULL;
1391 if (strcmp(command, GOT_DIAL_CMD_FETCH) == 0)
1392 err = serve_read(infd, outfd, gotd_sock, repo_path, chattygot);
1393 else if (strcmp(command, GOT_DIAL_CMD_SEND) == 0)
1394 err = serve_write(infd, outfd, gotd_sock, repo_path,
1397 err = got_error(GOT_ERR_BAD_PACKET);