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Commit | Line | Data |
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731043fd | 1 | #include "git-compat-util.h" |
f7192598 | 2 | #include "cache.h" |
b2141fc1 | 3 | #include "config.h" |
41771fa4 | 4 | #include "hex.h" |
41cb7488 | 5 | #include "pkt-line.h" |
b10d0ec7 | 6 | #include "quote.h" |
6abf5c0c | 7 | #include "refs.h" |
15a1c012 | 8 | #include "run-command.h" |
6b62816c | 9 | #include "remote.h" |
47a59185 | 10 | #include "connect.h" |
9d2e9420 | 11 | #include "url.h" |
a45b5f05 | 12 | #include "string-list.h" |
fe299ec5 | 13 | #include "oid-array.h" |
a5adaced | 14 | #include "transport.h" |
0cd83283 | 15 | #include "strbuf.h" |
e52449b6 | 16 | #include "version.h" |
2609043d | 17 | #include "protocol.h" |
65b5f948 | 18 | #include "alias.h" |
0cfde740 | 19 | #include "bundle-uri.h" |
f7192598 | 20 | |
e52449b6 | 21 | static char *server_capabilities_v1; |
ef8d7ac4 | 22 | static struct strvec server_capabilities_v2 = STRVEC_INIT; |
2c6a403d | 23 | static const char *next_server_feature_value(const char *feature, int *len, int *offset); |
211b5f9e | 24 | |
be0b3f82 | 25 | static int check_ref(const char *name, unsigned int flags) |
2718ff09 LT |
26 | { |
27 | if (!flags) | |
28 | return 1; | |
29 | ||
be0b3f82 | 30 | if (!skip_prefix(name, "refs/", &name)) |
2718ff09 LT |
31 | return 0; |
32 | ||
2718ff09 | 33 | /* REF_NORMAL means that we don't want the magic fake tag refs */ |
8d9c5010 | 34 | if ((flags & REF_NORMAL) && check_refname_format(name, 0)) |
2718ff09 LT |
35 | return 0; |
36 | ||
37 | /* REF_HEADS means that we want regular branch heads */ | |
be0b3f82 | 38 | if ((flags & REF_HEADS) && starts_with(name, "heads/")) |
2718ff09 LT |
39 | return 1; |
40 | ||
41 | /* REF_TAGS means that we want tags */ | |
be0b3f82 | 42 | if ((flags & REF_TAGS) && starts_with(name, "tags/")) |
2718ff09 LT |
43 | return 1; |
44 | ||
45 | /* All type bits clear means that we are ok with anything */ | |
46 | return !(flags & ~REF_NORMAL); | |
47 | } | |
48 | ||
4577370e DB |
49 | int check_ref_type(const struct ref *ref, int flags) |
50 | { | |
be0b3f82 | 51 | return check_ref(ref->name, flags); |
4577370e DB |
52 | } |
53 | ||
d2bff22c | 54 | static NORETURN void die_initial_contact(int unexpected) |
46284dd1 | 55 | { |
7e3e479b BW |
56 | /* |
57 | * A hang-up after seeing some response from the other end | |
58 | * means that it is unexpected, as we know the other end is | |
59 | * willing to talk to us. A hang-up before seeing any | |
60 | * response does not necessarily mean an ACL problem, though. | |
61 | */ | |
55e4f936 | 62 | if (unexpected) |
1a07e59c | 63 | die(_("the remote end hung up upon initial contact")); |
46284dd1 | 64 | else |
f2b93b38 VA |
65 | die(_("Could not read from remote repository.\n\n" |
66 | "Please make sure you have the correct access rights\n" | |
67 | "and the repository exists.")); | |
46284dd1 HV |
68 | } |
69 | ||
e52449b6 | 70 | /* Checks if the server supports the capability 'c' */ |
a31cfe32 | 71 | int server_supports_v2(const char *c) |
e52449b6 BW |
72 | { |
73 | int i; | |
74 | ||
d70a9eb6 | 75 | for (i = 0; i < server_capabilities_v2.nr; i++) { |
e52449b6 | 76 | const char *out; |
d70a9eb6 | 77 | if (skip_prefix(server_capabilities_v2.v[i], c, &out) && |
e52449b6 BW |
78 | (!*out || *out == '=')) |
79 | return 1; | |
80 | } | |
a31cfe32 JK |
81 | return 0; |
82 | } | |
e52449b6 | 83 | |
a31cfe32 JK |
84 | void ensure_server_supports_v2(const char *c) |
85 | { | |
86 | if (!server_supports_v2(c)) | |
aad6fddb | 87 | die(_("server doesn't support '%s'"), c); |
e52449b6 BW |
88 | } |
89 | ||
1349ffed | 90 | int server_feature_v2(const char *c, const char **v) |
91 | { | |
92 | int i; | |
93 | ||
d70a9eb6 | 94 | for (i = 0; i < server_capabilities_v2.nr; i++) { |
1349ffed | 95 | const char *out; |
d70a9eb6 | 96 | if (skip_prefix(server_capabilities_v2.v[i], c, &out) && |
1349ffed | 97 | (*out == '=')) { |
98 | *v = out + 1; | |
99 | return 1; | |
100 | } | |
101 | } | |
102 | return 0; | |
103 | } | |
104 | ||
f7e20501 BW |
105 | int server_supports_feature(const char *c, const char *feature, |
106 | int die_on_error) | |
107 | { | |
108 | int i; | |
109 | ||
d70a9eb6 | 110 | for (i = 0; i < server_capabilities_v2.nr; i++) { |
f7e20501 | 111 | const char *out; |
d70a9eb6 | 112 | if (skip_prefix(server_capabilities_v2.v[i], c, &out) && |
f7e20501 BW |
113 | (!*out || *(out++) == '=')) { |
114 | if (parse_feature_request(out, feature)) | |
115 | return 1; | |
116 | else | |
117 | break; | |
118 | } | |
119 | } | |
120 | ||
121 | if (die_on_error) | |
aad6fddb | 122 | die(_("server doesn't support feature '%s'"), feature); |
f7e20501 BW |
123 | |
124 | return 0; | |
125 | } | |
126 | ||
e52449b6 BW |
127 | static void process_capabilities_v2(struct packet_reader *reader) |
128 | { | |
129 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) | |
ef8d7ac4 | 130 | strvec_push(&server_capabilities_v2, reader->line); |
e52449b6 BW |
131 | |
132 | if (reader->status != PACKET_READ_FLUSH) | |
aad6fddb | 133 | die(_("expected flush after capabilities")); |
e52449b6 BW |
134 | } |
135 | ||
ad6ac124 | 136 | enum protocol_version discover_version(struct packet_reader *reader) |
7e3e479b BW |
137 | { |
138 | enum protocol_version version = protocol_unknown_version; | |
139 | ||
140 | /* | |
141 | * Peek the first line of the server's response to | |
142 | * determine the protocol version the server is speaking. | |
143 | */ | |
144 | switch (packet_reader_peek(reader)) { | |
145 | case PACKET_READ_EOF: | |
146 | die_initial_contact(0); | |
147 | case PACKET_READ_FLUSH: | |
148 | case PACKET_READ_DELIM: | |
0181b600 | 149 | case PACKET_READ_RESPONSE_END: |
7e3e479b BW |
150 | version = protocol_v0; |
151 | break; | |
152 | case PACKET_READ_NORMAL: | |
153 | version = determine_protocol_version_client(reader->line); | |
154 | break; | |
155 | } | |
156 | ||
157 | switch (version) { | |
8f6982b4 | 158 | case protocol_v2: |
e52449b6 | 159 | process_capabilities_v2(reader); |
8f6982b4 | 160 | break; |
7e3e479b BW |
161 | case protocol_v1: |
162 | /* Read the peeked version line */ | |
163 | packet_reader_read(reader); | |
164 | break; | |
165 | case protocol_v0: | |
166 | break; | |
167 | case protocol_unknown_version: | |
168 | BUG("unknown protocol version"); | |
169 | } | |
170 | ||
626beebd JS |
171 | trace2_data_intmax("transfer", NULL, "negotiated-version", version); |
172 | ||
7e3e479b BW |
173 | return version; |
174 | } | |
175 | ||
a45b5f05 JH |
176 | static void parse_one_symref_info(struct string_list *symref, const char *val, int len) |
177 | { | |
178 | char *sym, *target; | |
179 | struct string_list_item *item; | |
180 | ||
181 | if (!len) | |
182 | return; /* just "symref" */ | |
183 | /* e.g. "symref=HEAD:refs/heads/master" */ | |
5c0b13f8 | 184 | sym = xmemdupz(val, len); |
a45b5f05 JH |
185 | target = strchr(sym, ':'); |
186 | if (!target) | |
187 | /* just "symref=something" */ | |
188 | goto reject; | |
189 | *(target++) = '\0'; | |
190 | if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) || | |
191 | check_refname_format(target, REFNAME_ALLOW_ONELEVEL)) | |
192 | /* "symref=bogus:pair */ | |
193 | goto reject; | |
ef4fe561 | 194 | item = string_list_append_nodup(symref, sym); |
a45b5f05 JH |
195 | item->util = target; |
196 | return; | |
197 | reject: | |
198 | free(sym); | |
199 | return; | |
200 | } | |
201 | ||
202 | static void annotate_refs_with_symref_info(struct ref *ref) | |
203 | { | |
204 | struct string_list symref = STRING_LIST_INIT_DUP; | |
2c6a403d | 205 | int offset = 0; |
a45b5f05 | 206 | |
2c6a403d | 207 | while (1) { |
a45b5f05 JH |
208 | int len; |
209 | const char *val; | |
210 | ||
2c6a403d | 211 | val = next_server_feature_value("symref", &len, &offset); |
a45b5f05 JH |
212 | if (!val) |
213 | break; | |
214 | parse_one_symref_info(&symref, val, len); | |
a45b5f05 | 215 | } |
3383e199 | 216 | string_list_sort(&symref); |
a45b5f05 JH |
217 | |
218 | for (; ref; ref = ref->next) { | |
219 | struct string_list_item *item; | |
220 | item = string_list_lookup(&symref, ref->name); | |
221 | if (!item) | |
222 | continue; | |
223 | ref->symref = xstrdup((char *)item->util); | |
224 | } | |
225 | string_list_clear(&symref, 0); | |
226 | } | |
227 | ||
92315e50 | 228 | static void process_capabilities(struct packet_reader *reader, int *linelen) |
2609043d | 229 | { |
7c601dc3 | 230 | const char *feat_val; |
231 | int feat_len; | |
92315e50 | 232 | const char *line = reader->line; |
7e3e479b | 233 | int nul_location = strlen(line); |
92315e50 | 234 | if (nul_location == *linelen) |
0cd83283 | 235 | return; |
e52449b6 | 236 | server_capabilities_v1 = xstrdup(line + nul_location + 1); |
92315e50 | 237 | *linelen = nul_location; |
7c601dc3 | 238 | |
239 | feat_val = server_feature_value("object-format", &feat_len); | |
240 | if (feat_val) { | |
241 | char *hash_name = xstrndup(feat_val, feat_len); | |
242 | int hash_algo = hash_algo_by_name(hash_name); | |
243 | if (hash_algo != GIT_HASH_UNKNOWN) | |
244 | reader->hash_algo = &hash_algos[hash_algo]; | |
245 | free(hash_name); | |
246 | } else { | |
247 | reader->hash_algo = &hash_algos[GIT_HASH_SHA1]; | |
248 | } | |
0cd83283 JT |
249 | } |
250 | ||
92315e50 | 251 | static int process_dummy_ref(const struct packet_reader *reader) |
0cd83283 | 252 | { |
92315e50 | 253 | const char *line = reader->line; |
0cd83283 JT |
254 | struct object_id oid; |
255 | const char *name; | |
256 | ||
7c601dc3 | 257 | if (parse_oid_hex_algop(line, &oid, &name, reader->hash_algo)) |
0cd83283 JT |
258 | return 0; |
259 | if (*name != ' ') | |
260 | return 0; | |
261 | name++; | |
262 | ||
14228447 | 263 | return oideq(null_oid(), &oid) && !strcmp(name, "capabilities^{}"); |
0cd83283 JT |
264 | } |
265 | ||
7e3e479b | 266 | static void check_no_capabilities(const char *line, int len) |
0cd83283 | 267 | { |
7e3e479b | 268 | if (strlen(line) != len) |
aad6fddb | 269 | warning(_("ignoring capabilities after first line '%s'"), |
7e3e479b | 270 | line + strlen(line)); |
0cd83283 JT |
271 | } |
272 | ||
92315e50 | 273 | static int process_ref(const struct packet_reader *reader, int len, |
274 | struct ref ***list, unsigned int flags, | |
275 | struct oid_array *extra_have) | |
0cd83283 | 276 | { |
92315e50 | 277 | const char *line = reader->line; |
0cd83283 JT |
278 | struct object_id old_oid; |
279 | const char *name; | |
280 | ||
7c601dc3 | 281 | if (parse_oid_hex_algop(line, &old_oid, &name, reader->hash_algo)) |
0cd83283 JT |
282 | return 0; |
283 | if (*name != ' ') | |
284 | return 0; | |
285 | name++; | |
286 | ||
287 | if (extra_have && !strcmp(name, ".have")) { | |
288 | oid_array_append(extra_have, &old_oid); | |
289 | } else if (!strcmp(name, "capabilities^{}")) { | |
aad6fddb | 290 | die(_("protocol error: unexpected capabilities^{}")); |
0cd83283 JT |
291 | } else if (check_ref(name, flags)) { |
292 | struct ref *ref = alloc_ref(name); | |
293 | oidcpy(&ref->old_oid, &old_oid); | |
294 | **list = ref; | |
295 | *list = &ref->next; | |
296 | } | |
7e3e479b | 297 | check_no_capabilities(line, len); |
0cd83283 JT |
298 | return 1; |
299 | } | |
300 | ||
92315e50 | 301 | static int process_shallow(const struct packet_reader *reader, int len, |
7e3e479b | 302 | struct oid_array *shallow_points) |
0cd83283 | 303 | { |
92315e50 | 304 | const char *line = reader->line; |
0cd83283 JT |
305 | const char *arg; |
306 | struct object_id old_oid; | |
307 | ||
7e3e479b | 308 | if (!skip_prefix(line, "shallow ", &arg)) |
0cd83283 JT |
309 | return 0; |
310 | ||
7c601dc3 | 311 | if (get_oid_hex_algop(arg, &old_oid, reader->hash_algo)) |
aad6fddb | 312 | die(_("protocol error: expected shallow sha-1, got '%s'"), arg); |
0cd83283 | 313 | if (!shallow_points) |
aad6fddb | 314 | die(_("repository on the other end cannot be shallow")); |
0cd83283 | 315 | oid_array_append(shallow_points, &old_oid); |
7e3e479b | 316 | check_no_capabilities(line, len); |
0cd83283 JT |
317 | return 1; |
318 | } | |
319 | ||
7e3e479b BW |
320 | enum get_remote_heads_state { |
321 | EXPECTING_FIRST_REF = 0, | |
322 | EXPECTING_REF, | |
323 | EXPECTING_SHALLOW, | |
324 | EXPECTING_DONE, | |
325 | }; | |
326 | ||
d1c133f5 LT |
327 | /* |
328 | * Read all the refs from the other end | |
329 | */ | |
ad6ac124 | 330 | struct ref **get_remote_heads(struct packet_reader *reader, |
85edf4f5 | 331 | struct ref **list, unsigned int flags, |
910650d2 | 332 | struct oid_array *extra_have, |
333 | struct oid_array *shallow_points) | |
d1c133f5 | 334 | { |
a45b5f05 | 335 | struct ref **orig_list = list; |
7e3e479b BW |
336 | int len = 0; |
337 | enum get_remote_heads_state state = EXPECTING_FIRST_REF; | |
55e4f936 | 338 | |
d1c133f5 | 339 | *list = NULL; |
1a7141ff | 340 | |
7e3e479b | 341 | while (state != EXPECTING_DONE) { |
ad6ac124 | 342 | switch (packet_reader_read(reader)) { |
7e3e479b BW |
343 | case PACKET_READ_EOF: |
344 | die_initial_contact(1); | |
345 | case PACKET_READ_NORMAL: | |
ad6ac124 | 346 | len = reader->pktlen; |
7e3e479b BW |
347 | break; |
348 | case PACKET_READ_FLUSH: | |
349 | state = EXPECTING_DONE; | |
350 | break; | |
351 | case PACKET_READ_DELIM: | |
0181b600 | 352 | case PACKET_READ_RESPONSE_END: |
aad6fddb | 353 | die(_("invalid packet")); |
7e3e479b BW |
354 | } |
355 | ||
0cd83283 JT |
356 | switch (state) { |
357 | case EXPECTING_FIRST_REF: | |
92315e50 | 358 | process_capabilities(reader, &len); |
359 | if (process_dummy_ref(reader)) { | |
0cd83283 JT |
360 | state = EXPECTING_SHALLOW; |
361 | break; | |
362 | } | |
363 | state = EXPECTING_REF; | |
364 | /* fallthrough */ | |
365 | case EXPECTING_REF: | |
92315e50 | 366 | if (process_ref(reader, len, &list, flags, extra_have)) |
0cd83283 JT |
367 | break; |
368 | state = EXPECTING_SHALLOW; | |
369 | /* fallthrough */ | |
370 | case EXPECTING_SHALLOW: | |
92315e50 | 371 | if (process_shallow(reader, len, shallow_points)) |
0cd83283 | 372 | break; |
aad6fddb | 373 | die(_("protocol error: unexpected '%s'"), reader->line); |
7e3e479b BW |
374 | case EXPECTING_DONE: |
375 | break; | |
211b5f9e | 376 | } |
d1c133f5 | 377 | } |
a45b5f05 JH |
378 | |
379 | annotate_refs_with_symref_info(*orig_list); | |
380 | ||
d1c133f5 LT |
381 | return list; |
382 | } | |
383 | ||
e52449b6 | 384 | /* Returns 1 when a valid ref has been added to `list`, 0 otherwise */ |
4f37d457 | 385 | static int process_ref_v2(struct packet_reader *reader, struct ref ***list, |
f36d4f83 | 386 | const char **unborn_head_target) |
e52449b6 BW |
387 | { |
388 | int ret = 1; | |
389 | int i = 0; | |
390 | struct object_id old_oid; | |
391 | struct ref *ref; | |
392 | struct string_list line_sections = STRING_LIST_INIT_DUP; | |
393 | const char *end; | |
67e9a707 | 394 | const char *line = reader->line; |
e52449b6 BW |
395 | |
396 | /* | |
397 | * Ref lines have a number of fields which are space deliminated. The | |
398 | * first field is the OID of the ref. The second field is the ref | |
399 | * name. Subsequent fields (symref-target and peeled) are optional and | |
400 | * don't have a particular order. | |
401 | */ | |
402 | if (string_list_split(&line_sections, line, ' ', -1) < 2) { | |
403 | ret = 0; | |
404 | goto out; | |
405 | } | |
406 | ||
4f37d457 JT |
407 | if (!strcmp("unborn", line_sections.items[i].string)) { |
408 | i++; | |
409 | if (unborn_head_target && | |
410 | !strcmp("HEAD", line_sections.items[i++].string)) { | |
411 | /* | |
412 | * Look for the symref target (if any). If found, | |
413 | * return it to the caller. | |
414 | */ | |
415 | for (; i < line_sections.nr; i++) { | |
416 | const char *arg = line_sections.items[i].string; | |
417 | ||
418 | if (skip_prefix(arg, "symref-target:", &arg)) { | |
419 | *unborn_head_target = xstrdup(arg); | |
420 | break; | |
421 | } | |
422 | } | |
423 | } | |
424 | goto out; | |
425 | } | |
ab67235b | 426 | if (parse_oid_hex_algop(line_sections.items[i++].string, &old_oid, &end, reader->hash_algo) || |
e52449b6 BW |
427 | *end) { |
428 | ret = 0; | |
429 | goto out; | |
430 | } | |
431 | ||
432 | ref = alloc_ref(line_sections.items[i++].string); | |
433 | ||
ab67235b | 434 | memcpy(ref->old_oid.hash, old_oid.hash, reader->hash_algo->rawsz); |
e52449b6 BW |
435 | **list = ref; |
436 | *list = &ref->next; | |
437 | ||
438 | for (; i < line_sections.nr; i++) { | |
439 | const char *arg = line_sections.items[i].string; | |
440 | if (skip_prefix(arg, "symref-target:", &arg)) | |
441 | ref->symref = xstrdup(arg); | |
442 | ||
443 | if (skip_prefix(arg, "peeled:", &arg)) { | |
444 | struct object_id peeled_oid; | |
445 | char *peeled_name; | |
446 | struct ref *peeled; | |
ab67235b | 447 | if (parse_oid_hex_algop(arg, &peeled_oid, &end, |
448 | reader->hash_algo) || *end) { | |
e52449b6 BW |
449 | ret = 0; |
450 | goto out; | |
451 | } | |
452 | ||
453 | peeled_name = xstrfmt("%s^{}", ref->name); | |
454 | peeled = alloc_ref(peeled_name); | |
455 | ||
ab67235b | 456 | memcpy(peeled->old_oid.hash, peeled_oid.hash, |
457 | reader->hash_algo->rawsz); | |
e52449b6 BW |
458 | **list = peeled; |
459 | *list = &peeled->next; | |
460 | ||
461 | free(peeled_name); | |
462 | } | |
463 | } | |
464 | ||
465 | out: | |
466 | string_list_clear(&line_sections, 0); | |
467 | return ret; | |
468 | } | |
469 | ||
b0df0c16 DL |
470 | void check_stateless_delimiter(int stateless_rpc, |
471 | struct packet_reader *reader, | |
472 | const char *error) | |
473 | { | |
474 | if (!stateless_rpc) | |
475 | return; /* not in stateless mode, no delimiter expected */ | |
476 | if (packet_reader_read(reader) != PACKET_READ_RESPONSE_END) | |
477 | die("%s", error); | |
478 | } | |
479 | ||
86f4e312 ÆAB |
480 | static void send_capabilities(int fd_out, struct packet_reader *reader) |
481 | { | |
482 | const char *hash_name; | |
483 | ||
a31cfe32 | 484 | if (server_supports_v2("agent")) |
86f4e312 ÆAB |
485 | packet_write_fmt(fd_out, "agent=%s", git_user_agent_sanitized()); |
486 | ||
487 | if (server_feature_v2("object-format", &hash_name)) { | |
488 | int hash_algo = hash_algo_by_name(hash_name); | |
489 | if (hash_algo == GIT_HASH_UNKNOWN) | |
490 | die(_("unknown object format '%s' specified by server"), hash_name); | |
491 | reader->hash_algo = &hash_algos[hash_algo]; | |
492 | packet_write_fmt(fd_out, "object-format=%s", reader->hash_algo->name); | |
493 | } else { | |
494 | reader->hash_algo = &hash_algos[GIT_HASH_SHA1]; | |
495 | } | |
496 | } | |
497 | ||
0cfde740 ÆAB |
498 | int get_remote_bundle_uri(int fd_out, struct packet_reader *reader, |
499 | struct bundle_list *bundles, int stateless_rpc) | |
500 | { | |
501 | int line_nr = 1; | |
502 | ||
503 | /* Assert bundle-uri support */ | |
0903d8bb | 504 | ensure_server_supports_v2("bundle-uri"); |
0cfde740 ÆAB |
505 | |
506 | /* (Re-)send capabilities */ | |
507 | send_capabilities(fd_out, reader); | |
508 | ||
509 | /* Send command */ | |
510 | packet_write_fmt(fd_out, "command=bundle-uri\n"); | |
511 | packet_delim(fd_out); | |
512 | ||
513 | packet_flush(fd_out); | |
514 | ||
515 | /* Process response from server */ | |
516 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
517 | const char *line = reader->line; | |
518 | line_nr++; | |
519 | ||
520 | if (!bundle_uri_parse_line(bundles, line)) | |
521 | continue; | |
522 | ||
523 | return error(_("error on bundle-uri response line %d: %s"), | |
524 | line_nr, line); | |
525 | } | |
526 | ||
527 | if (reader->status != PACKET_READ_FLUSH) | |
528 | return error(_("expected flush after bundle-uri listing")); | |
529 | ||
530 | /* | |
531 | * Might die(), but obscure enough that that's OK, e.g. in | |
532 | * serve.c we'll call BUG() on its equivalent (the | |
533 | * PACKET_READ_RESPONSE_END check). | |
534 | */ | |
535 | check_stateless_delimiter(stateless_rpc, reader, | |
536 | _("expected response end packet after ref listing")); | |
537 | ||
538 | return 0; | |
539 | } | |
540 | ||
e52449b6 BW |
541 | struct ref **get_remote_refs(int fd_out, struct packet_reader *reader, |
542 | struct ref **list, int for_push, | |
39835409 | 543 | struct transport_ls_refs_options *transport_options, |
b0df0c16 DL |
544 | const struct string_list *server_options, |
545 | int stateless_rpc) | |
e52449b6 BW |
546 | { |
547 | int i; | |
39835409 JT |
548 | struct strvec *ref_prefixes = transport_options ? |
549 | &transport_options->ref_prefixes : NULL; | |
f36d4f83 | 550 | const char **unborn_head_target = transport_options ? |
4f37d457 | 551 | &transport_options->unborn_head_target : NULL; |
e52449b6 BW |
552 | *list = NULL; |
553 | ||
a31cfe32 JK |
554 | ensure_server_supports_v2("ls-refs"); |
555 | packet_write_fmt(fd_out, "command=ls-refs\n"); | |
e52449b6 | 556 | |
86f4e312 ÆAB |
557 | /* Send capabilities */ |
558 | send_capabilities(fd_out, reader); | |
ab67235b | 559 | |
a31cfe32 JK |
560 | if (server_options && server_options->nr) { |
561 | ensure_server_supports_v2("server-option"); | |
ff473221 BW |
562 | for (i = 0; i < server_options->nr; i++) |
563 | packet_write_fmt(fd_out, "server-option=%s", | |
564 | server_options->items[i].string); | |
a31cfe32 | 565 | } |
ff473221 | 566 | |
e52449b6 BW |
567 | packet_delim(fd_out); |
568 | /* When pushing we don't want to request the peeled tags */ | |
569 | if (!for_push) | |
570 | packet_write_fmt(fd_out, "peel\n"); | |
571 | packet_write_fmt(fd_out, "symrefs\n"); | |
4f37d457 JT |
572 | if (server_supports_feature("ls-refs", "unborn", 0)) |
573 | packet_write_fmt(fd_out, "unborn\n"); | |
d70a9eb6 | 574 | for (i = 0; ref_prefixes && i < ref_prefixes->nr; i++) { |
e52449b6 | 575 | packet_write_fmt(fd_out, "ref-prefix %s\n", |
d70a9eb6 | 576 | ref_prefixes->v[i]); |
e52449b6 BW |
577 | } |
578 | packet_flush(fd_out); | |
579 | ||
580 | /* Process response from server */ | |
581 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
4f37d457 | 582 | if (!process_ref_v2(reader, &list, unborn_head_target)) |
aad6fddb | 583 | die(_("invalid ls-refs response: %s"), reader->line); |
e52449b6 BW |
584 | } |
585 | ||
586 | if (reader->status != PACKET_READ_FLUSH) | |
aad6fddb | 587 | die(_("expected flush after ref listing")); |
e52449b6 | 588 | |
b0df0c16 DL |
589 | check_stateless_delimiter(stateless_rpc, reader, |
590 | _("expected response end packet after ref listing")); | |
591 | ||
e52449b6 BW |
592 | return list; |
593 | } | |
594 | ||
84eca27a | 595 | const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp, int *offset) |
f47182c8 JH |
596 | { |
597 | int len; | |
598 | ||
599 | if (!feature_list) | |
600 | return NULL; | |
601 | ||
602 | len = strlen(feature); | |
2c6a403d | 603 | if (offset) |
604 | feature_list += *offset; | |
f47182c8 JH |
605 | while (*feature_list) { |
606 | const char *found = strstr(feature_list, feature); | |
607 | if (!found) | |
608 | return NULL; | |
94427108 JK |
609 | if (feature_list == found || isspace(found[-1])) { |
610 | const char *value = found + len; | |
611 | /* feature with no value (e.g., "thin-pack") */ | |
612 | if (!*value || isspace(*value)) { | |
613 | if (lenp) | |
614 | *lenp = 0; | |
44d2aec6 AH |
615 | if (offset) |
616 | *offset = found + len - feature_list; | |
94427108 JK |
617 | return value; |
618 | } | |
619 | /* feature with a value (e.g., "agent=git/1.2.3") */ | |
620 | else if (*value == '=') { | |
2c6a403d | 621 | int end; |
622 | ||
94427108 | 623 | value++; |
2c6a403d | 624 | end = strcspn(value, " \t\n"); |
94427108 | 625 | if (lenp) |
2c6a403d | 626 | *lenp = end; |
627 | if (offset) | |
628 | *offset = value + end - feature_list; | |
94427108 JK |
629 | return value; |
630 | } | |
631 | /* | |
632 | * otherwise we matched a substring of another feature; | |
633 | * keep looking | |
634 | */ | |
635 | } | |
f47182c8 JH |
636 | feature_list = found + 1; |
637 | } | |
638 | return NULL; | |
211b5f9e JS |
639 | } |
640 | ||
122037c2 | 641 | int server_supports_hash(const char *desired, int *feature_supported) |
642 | { | |
643 | int offset = 0; | |
644 | int len; | |
645 | const char *hash; | |
646 | ||
647 | hash = next_server_feature_value("object-format", &len, &offset); | |
648 | if (feature_supported) | |
649 | *feature_supported = !!hash; | |
650 | if (!hash) { | |
651 | hash = hash_algos[GIT_HASH_SHA1].name; | |
652 | len = strlen(hash); | |
653 | } | |
654 | while (hash) { | |
655 | if (!xstrncmpz(desired, hash, len)) | |
656 | return 1; | |
657 | ||
658 | hash = next_server_feature_value("object-format", &len, &offset); | |
659 | } | |
660 | return 0; | |
661 | } | |
662 | ||
94427108 JK |
663 | int parse_feature_request(const char *feature_list, const char *feature) |
664 | { | |
2c6a403d | 665 | return !!parse_feature_value(feature_list, feature, NULL, NULL); |
666 | } | |
667 | ||
668 | static const char *next_server_feature_value(const char *feature, int *len, int *offset) | |
669 | { | |
670 | return parse_feature_value(server_capabilities_v1, feature, len, offset); | |
94427108 JK |
671 | } |
672 | ||
673 | const char *server_feature_value(const char *feature, int *len) | |
674 | { | |
2c6a403d | 675 | return parse_feature_value(server_capabilities_v1, feature, len, NULL); |
94427108 JK |
676 | } |
677 | ||
678 | int server_supports(const char *feature) | |
679 | { | |
680 | return !!server_feature_value(feature, NULL); | |
681 | } | |
682 | ||
2386d658 LT |
683 | enum protocol { |
684 | PROTO_LOCAL = 1, | |
c59ab2e5 | 685 | PROTO_FILE, |
2386d658 | 686 | PROTO_SSH, |
4b05548f | 687 | PROTO_GIT |
2386d658 LT |
688 | }; |
689 | ||
c59ab2e5 TB |
690 | int url_is_local_not_ssh(const char *url) |
691 | { | |
692 | const char *colon = strchr(url, ':'); | |
693 | const char *slash = strchr(url, '/'); | |
694 | return !colon || (slash && slash < colon) || | |
f82a97eb | 695 | (has_dos_drive_prefix(url) && is_valid_path(url)); |
c59ab2e5 TB |
696 | } |
697 | ||
5610b7c0 TB |
698 | static const char *prot_name(enum protocol protocol) |
699 | { | |
700 | switch (protocol) { | |
701 | case PROTO_LOCAL: | |
c59ab2e5 | 702 | case PROTO_FILE: |
5610b7c0 TB |
703 | return "file"; |
704 | case PROTO_SSH: | |
705 | return "ssh"; | |
706 | case PROTO_GIT: | |
707 | return "git"; | |
708 | default: | |
83e6bda3 | 709 | return "unknown protocol"; |
5610b7c0 TB |
710 | } |
711 | } | |
712 | ||
2386d658 LT |
713 | static enum protocol get_protocol(const char *name) |
714 | { | |
715 | if (!strcmp(name, "ssh")) | |
716 | return PROTO_SSH; | |
717 | if (!strcmp(name, "git")) | |
718 | return PROTO_GIT; | |
07c7782c | 719 | if (!strcmp(name, "git+ssh")) /* deprecated - do not use */ |
c05186cc | 720 | return PROTO_SSH; |
07c7782c | 721 | if (!strcmp(name, "ssh+git")) /* deprecated - do not use */ |
c05186cc | 722 | return PROTO_SSH; |
72a4f4b6 | 723 | if (!strcmp(name, "file")) |
c59ab2e5 | 724 | return PROTO_FILE; |
aad6fddb | 725 | die(_("protocol '%s' is not supported"), name); |
2386d658 LT |
726 | } |
727 | ||
86ceb337 TB |
728 | static char *host_end(char **hoststart, int removebrackets) |
729 | { | |
730 | char *host = *hoststart; | |
731 | char *end; | |
732 | char *start = strstr(host, "@["); | |
733 | if (start) | |
734 | start++; /* Jump over '@' */ | |
735 | else | |
736 | start = host; | |
737 | if (start[0] == '[') { | |
738 | end = strchr(start + 1, ']'); | |
739 | if (end) { | |
740 | if (removebrackets) { | |
741 | *end = 0; | |
742 | memmove(start, start + 1, end - start); | |
743 | end++; | |
744 | } | |
745 | } else | |
746 | end = host; | |
747 | } else | |
748 | end = host; | |
749 | return end; | |
750 | } | |
751 | ||
5ba88448 YH |
752 | #define STR_(s) # s |
753 | #define STR(s) STR_(s) | |
2386d658 | 754 | |
72a534da ML |
755 | static void get_host_and_port(char **host, const char **port) |
756 | { | |
757 | char *colon, *end; | |
86ceb337 | 758 | end = host_end(host, 1); |
72a534da | 759 | colon = strchr(end, ':'); |
72a534da | 760 | if (colon) { |
86ceb337 TB |
761 | long portnr = strtol(colon + 1, &end, 10); |
762 | if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) { | |
763 | *colon = 0; | |
764 | *port = colon + 1; | |
6b6c5f7a TB |
765 | } else if (!colon[1]) { |
766 | *colon = 0; | |
86ceb337 | 767 | } |
72a534da ML |
768 | } |
769 | } | |
770 | ||
e47a8583 EW |
771 | static void enable_keepalive(int sockfd) |
772 | { | |
773 | int ka = 1; | |
774 | ||
775 | if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0) | |
aad6fddb | 776 | error_errno(_("unable to set SO_KEEPALIVE on socket")); |
e47a8583 EW |
777 | } |
778 | ||
49744d63 | 779 | #ifndef NO_IPV6 |
4c505f71 | 780 | |
ba505322 AR |
781 | static const char *ai_name(const struct addrinfo *ai) |
782 | { | |
785a9857 BK |
783 | static char addr[NI_MAXHOST]; |
784 | if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0, | |
785 | NI_NUMERICHOST) != 0) | |
5096d490 | 786 | xsnprintf(addr, sizeof(addr), "(unknown)"); |
785a9857 | 787 | |
ba505322 AR |
788 | return addr; |
789 | } | |
790 | ||
5ad312be JL |
791 | /* |
792 | * Returns a connected socket() fd, or else die()s. | |
793 | */ | |
7841ce79 | 794 | static int git_tcp_connect_sock(char *host, int flags) |
2386d658 | 795 | { |
63a995b6 DZ |
796 | struct strbuf error_message = STRBUF_INIT; |
797 | int sockfd = -1; | |
554fe20d | 798 | const char *port = STR(DEFAULT_GIT_PORT); |
5ba88448 YH |
799 | struct addrinfo hints, *ai0, *ai; |
800 | int gai; | |
ba505322 | 801 | int cnt = 0; |
5ba88448 | 802 | |
72a534da ML |
803 | get_host_and_port(&host, &port); |
804 | if (!*port) | |
805 | port = "<none>"; | |
5ba88448 YH |
806 | |
807 | memset(&hints, 0, sizeof(hints)); | |
c915f11e EW |
808 | if (flags & CONNECT_IPV4) |
809 | hints.ai_family = AF_INET; | |
810 | else if (flags & CONNECT_IPV6) | |
811 | hints.ai_family = AF_INET6; | |
5ba88448 YH |
812 | hints.ai_socktype = SOCK_STREAM; |
813 | hints.ai_protocol = IPPROTO_TCP; | |
814 | ||
7841ce79 | 815 | if (flags & CONNECT_VERBOSE) |
aad6fddb | 816 | fprintf(stderr, _("Looking up %s ... "), host); |
7841ce79 | 817 | |
5ba88448 YH |
818 | gai = getaddrinfo(host, port, &hints, &ai); |
819 | if (gai) | |
aad6fddb | 820 | die(_("unable to look up %s (port %s) (%s)"), host, port, gai_strerror(gai)); |
5ba88448 | 821 | |
7841ce79 | 822 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
823 | /* TRANSLATORS: this is the end of "Looking up %s ... " */ |
824 | fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port); | |
7841ce79 | 825 | |
e08afecd | 826 | for (ai0 = ai; ai; ai = ai->ai_next, cnt++) { |
5ad312be JL |
827 | sockfd = socket(ai->ai_family, |
828 | ai->ai_socktype, ai->ai_protocol); | |
63a995b6 DZ |
829 | if ((sockfd < 0) || |
830 | (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) { | |
831 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
832 | host, cnt, ai_name(ai), strerror(errno)); | |
833 | if (0 <= sockfd) | |
834 | close(sockfd); | |
5ba88448 YH |
835 | sockfd = -1; |
836 | continue; | |
2386d658 | 837 | } |
ba505322 AR |
838 | if (flags & CONNECT_VERBOSE) |
839 | fprintf(stderr, "%s ", ai_name(ai)); | |
5ba88448 | 840 | break; |
2386d658 LT |
841 | } |
842 | ||
5ba88448 | 843 | freeaddrinfo(ai0); |
2386d658 | 844 | |
2386d658 | 845 | if (sockfd < 0) |
aad6fddb | 846 | die(_("unable to connect to %s:\n%s"), host, error_message.buf); |
5ba88448 | 847 | |
e47a8583 EW |
848 | enable_keepalive(sockfd); |
849 | ||
7841ce79 | 850 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
851 | /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */ |
852 | fprintf_ln(stderr, _("done.")); | |
7841ce79 | 853 | |
63a995b6 DZ |
854 | strbuf_release(&error_message); |
855 | ||
5ad312be | 856 | return sockfd; |
2386d658 LT |
857 | } |
858 | ||
49744d63 | 859 | #else /* NO_IPV6 */ |
4c505f71 | 860 | |
5ad312be JL |
861 | /* |
862 | * Returns a connected socket() fd, or else die()s. | |
863 | */ | |
7841ce79 | 864 | static int git_tcp_connect_sock(char *host, int flags) |
4c505f71 | 865 | { |
7203a2d1 EFL |
866 | struct strbuf error_message = STRBUF_INIT; |
867 | int sockfd = -1; | |
72a534da ML |
868 | const char *port = STR(DEFAULT_GIT_PORT); |
869 | char *ep; | |
4c505f71 PA |
870 | struct hostent *he; |
871 | struct sockaddr_in sa; | |
872 | char **ap; | |
873 | unsigned int nport; | |
ba505322 | 874 | int cnt; |
4c505f71 | 875 | |
72a534da | 876 | get_host_and_port(&host, &port); |
4c505f71 | 877 | |
7841ce79 | 878 | if (flags & CONNECT_VERBOSE) |
aad6fddb | 879 | fprintf(stderr, _("Looking up %s ... "), host); |
7841ce79 | 880 | |
4c505f71 PA |
881 | he = gethostbyname(host); |
882 | if (!he) | |
aad6fddb | 883 | die(_("unable to look up %s (%s)"), host, hstrerror(h_errno)); |
4c505f71 PA |
884 | nport = strtoul(port, &ep, 10); |
885 | if ( ep == port || *ep ) { | |
886 | /* Not numeric */ | |
887 | struct servent *se = getservbyname(port,"tcp"); | |
888 | if ( !se ) | |
aad6fddb | 889 | die(_("unknown port %s"), port); |
4c505f71 PA |
890 | nport = se->s_port; |
891 | } | |
892 | ||
7841ce79 | 893 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
894 | /* TRANSLATORS: this is the end of "Looking up %s ... " */ |
895 | fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port); | |
7841ce79 | 896 | |
ba505322 | 897 | for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) { |
4c505f71 PA |
898 | memset(&sa, 0, sizeof sa); |
899 | sa.sin_family = he->h_addrtype; | |
6573faff | 900 | sa.sin_port = htons(nport); |
c6164218 | 901 | memcpy(&sa.sin_addr, *ap, he->h_length); |
4c505f71 | 902 | |
7203a2d1 EFL |
903 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); |
904 | if ((sockfd < 0) || | |
905 | connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
906 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
ba505322 AR |
907 | host, |
908 | cnt, | |
909 | inet_ntoa(*(struct in_addr *)&sa.sin_addr), | |
7203a2d1 EFL |
910 | strerror(errno)); |
911 | if (0 <= sockfd) | |
912 | close(sockfd); | |
4c505f71 PA |
913 | sockfd = -1; |
914 | continue; | |
915 | } | |
ba505322 AR |
916 | if (flags & CONNECT_VERBOSE) |
917 | fprintf(stderr, "%s ", | |
918 | inet_ntoa(*(struct in_addr *)&sa.sin_addr)); | |
4c505f71 PA |
919 | break; |
920 | } | |
921 | ||
922 | if (sockfd < 0) | |
aad6fddb | 923 | die(_("unable to connect to %s:\n%s"), host, error_message.buf); |
4c505f71 | 924 | |
e47a8583 EW |
925 | enable_keepalive(sockfd); |
926 | ||
7841ce79 | 927 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
928 | /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */ |
929 | fprintf_ln(stderr, _("done.")); | |
7841ce79 | 930 | |
5ad312be JL |
931 | return sockfd; |
932 | } | |
933 | ||
934 | #endif /* NO_IPV6 */ | |
935 | ||
936 | ||
8e349780 JN |
937 | /* |
938 | * Dummy child_process returned by git_connect() if the transport protocol | |
939 | * does not need fork(2). | |
940 | */ | |
941 | static struct child_process no_fork = CHILD_PROCESS_INIT; | |
942 | ||
943 | int git_connection_is_socket(struct child_process *conn) | |
944 | { | |
945 | return conn == &no_fork; | |
946 | } | |
947 | ||
948 | static struct child_process *git_tcp_connect(int fd[2], char *host, int flags) | |
5ad312be | 949 | { |
7841ce79 | 950 | int sockfd = git_tcp_connect_sock(host, flags); |
5ad312be | 951 | |
4c505f71 | 952 | fd[0] = sockfd; |
ec587fde | 953 | fd[1] = dup(sockfd); |
8e349780 JN |
954 | |
955 | return &no_fork; | |
4c505f71 PA |
956 | } |
957 | ||
4c505f71 | 958 | |
96f1e58f | 959 | static char *git_proxy_command; |
f8014776 | 960 | |
ef90d6d4 JS |
961 | static int git_proxy_command_options(const char *var, const char *value, |
962 | void *cb) | |
f8014776 | 963 | { |
e814bc4d | 964 | if (!strcmp(var, "core.gitproxy")) { |
c3df8568 YH |
965 | const char *for_pos; |
966 | int matchlen = -1; | |
967 | int hostlen; | |
15112c95 EFL |
968 | const char *rhost_name = cb; |
969 | int rhost_len = strlen(rhost_name); | |
c3df8568 | 970 | |
e814bc4d | 971 | if (git_proxy_command) |
f8014776 | 972 | return 0; |
c64b9ad0 JH |
973 | if (!value) |
974 | return config_error_nonbool(var); | |
e814bc4d JH |
975 | /* [core] |
976 | * ;# matches www.kernel.org as well | |
977 | * gitproxy = netcatter-1 for kernel.org | |
978 | * gitproxy = netcatter-2 for sample.xz | |
979 | * gitproxy = netcatter-default | |
980 | */ | |
c3df8568 | 981 | for_pos = strstr(value, " for "); |
e814bc4d JH |
982 | if (!for_pos) |
983 | /* matches everybody */ | |
984 | matchlen = strlen(value); | |
985 | else { | |
986 | hostlen = strlen(for_pos + 5); | |
987 | if (rhost_len < hostlen) | |
988 | matchlen = -1; | |
989 | else if (!strncmp(for_pos + 5, | |
990 | rhost_name + rhost_len - hostlen, | |
991 | hostlen) && | |
992 | ((rhost_len == hostlen) || | |
993 | rhost_name[rhost_len - hostlen -1] == '.')) | |
994 | matchlen = for_pos - value; | |
995 | else | |
996 | matchlen = -1; | |
997 | } | |
998 | if (0 <= matchlen) { | |
999 | /* core.gitproxy = none for kernel.org */ | |
a6080a0a | 1000 | if (matchlen == 4 && |
e814bc4d JH |
1001 | !memcmp(value, "none", 4)) |
1002 | matchlen = 0; | |
182af834 | 1003 | git_proxy_command = xmemdupz(value, matchlen); |
f8014776 | 1004 | } |
e814bc4d | 1005 | return 0; |
f8014776 PC |
1006 | } |
1007 | ||
ef90d6d4 | 1008 | return git_default_config(var, value, cb); |
f8014776 PC |
1009 | } |
1010 | ||
e814bc4d | 1011 | static int git_use_proxy(const char *host) |
f8014776 PC |
1012 | { |
1013 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); | |
15112c95 | 1014 | git_config(git_proxy_command_options, (void*)host); |
e814bc4d | 1015 | return (git_proxy_command && *git_proxy_command); |
f8014776 PC |
1016 | } |
1017 | ||
5cbf8246 | 1018 | static struct child_process *git_proxy_connect(int fd[2], char *host) |
f8014776 | 1019 | { |
554fe20d | 1020 | const char *port = STR(DEFAULT_GIT_PORT); |
5cbf8246 | 1021 | struct child_process *proxy; |
f8014776 | 1022 | |
72a534da | 1023 | get_host_and_port(&host, &port); |
f8014776 | 1024 | |
3be4cf09 | 1025 | if (looks_like_command_line_option(host)) |
aad6fddb | 1026 | die(_("strange hostname '%s' blocked"), host); |
3be4cf09 | 1027 | if (looks_like_command_line_option(port)) |
aad6fddb | 1028 | die(_("strange port '%s' blocked"), port); |
3be4cf09 | 1029 | |
483bbd4e RS |
1030 | proxy = xmalloc(sizeof(*proxy)); |
1031 | child_process_init(proxy); | |
ef8d7ac4 JK |
1032 | strvec_push(&proxy->args, git_proxy_command); |
1033 | strvec_push(&proxy->args, host); | |
1034 | strvec_push(&proxy->args, port); | |
5cbf8246 JK |
1035 | proxy->in = -1; |
1036 | proxy->out = -1; | |
1037 | if (start_command(proxy)) | |
aad6fddb | 1038 | die(_("cannot start proxy %s"), git_proxy_command); |
5cbf8246 JK |
1039 | fd[0] = proxy->out; /* read from proxy stdout */ |
1040 | fd[1] = proxy->in; /* write to proxy stdin */ | |
1041 | return proxy; | |
f8014776 PC |
1042 | } |
1043 | ||
86ceb337 | 1044 | static char *get_port(char *host) |
2e776665 LT |
1045 | { |
1046 | char *end; | |
86ceb337 TB |
1047 | char *p = strchr(host, ':'); |
1048 | ||
2e776665 | 1049 | if (p) { |
8f148253 RS |
1050 | long port = strtol(p + 1, &end, 10); |
1051 | if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) { | |
86ceb337 TB |
1052 | *p = '\0'; |
1053 | return p+1; | |
2e776665 LT |
1054 | } |
1055 | } | |
1056 | ||
1057 | return NULL; | |
1058 | } | |
1059 | ||
f7192598 | 1060 | /* |
cabc3c12 JS |
1061 | * Extract protocol and relevant parts from the specified connection URL. |
1062 | * The caller must free() the returned strings. | |
f7192598 | 1063 | */ |
cabc3c12 | 1064 | static enum protocol parse_connect_url(const char *url_orig, char **ret_host, |
83b05875 | 1065 | char **ret_path) |
f7192598 | 1066 | { |
9d2e9420 | 1067 | char *url; |
8e76bf3f | 1068 | char *host, *path; |
356bece0 | 1069 | char *end; |
c59ab2e5 | 1070 | int separator = '/'; |
faea9ccb | 1071 | enum protocol protocol = PROTO_LOCAL; |
f0b7367c | 1072 | |
9d2e9420 JK |
1073 | if (is_url(url_orig)) |
1074 | url = url_decode(url_orig); | |
1075 | else | |
1076 | url = xstrdup(url_orig); | |
1077 | ||
faea9ccb | 1078 | host = strstr(url, "://"); |
eeefa7c9 | 1079 | if (host) { |
faea9ccb AE |
1080 | *host = '\0'; |
1081 | protocol = get_protocol(url); | |
1082 | host += 3; | |
356bece0 | 1083 | } else { |
f7192598 | 1084 | host = url; |
c59ab2e5 TB |
1085 | if (!url_is_local_not_ssh(url)) { |
1086 | protocol = PROTO_SSH; | |
1087 | separator = ':'; | |
1088 | } | |
356bece0 YH |
1089 | } |
1090 | ||
9aa5053d | 1091 | /* |
83b05875 TB |
1092 | * Don't do destructive transforms as protocol code does |
1093 | * '[]' unwrapping in get_host_and_port() | |
9aa5053d | 1094 | */ |
86ceb337 | 1095 | end = host_end(&host, 0); |
356bece0 | 1096 | |
c59ab2e5 | 1097 | if (protocol == PROTO_LOCAL) |
72a4f4b6 | 1098 | path = end; |
ebb8d2c9 TB |
1099 | else if (protocol == PROTO_FILE && *host != '/' && |
1100 | !has_dos_drive_prefix(host) && | |
1101 | offset_1st_component(host - 2) > 1) | |
1102 | path = host - 2; /* include the leading "//" */ | |
c59ab2e5 TB |
1103 | else if (protocol == PROTO_FILE && has_dos_drive_prefix(end)) |
1104 | path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */ | |
1105 | else | |
1106 | path = strchr(end, separator); | |
2386d658 | 1107 | |
faea9ccb | 1108 | if (!path || !*path) |
aad6fddb | 1109 | die(_("no path specified; see 'git help pull' for valid url syntax")); |
faea9ccb AE |
1110 | |
1111 | /* | |
1112 | * null-terminate hostname and point path to ~ for URL's like this: | |
1113 | * ssh://host.xz/~user/repo | |
1114 | */ | |
c59ab2e5 TB |
1115 | |
1116 | end = path; /* Need to \0 terminate host here */ | |
1117 | if (separator == ':') | |
1118 | path++; /* path starts after ':' */ | |
1119 | if (protocol == PROTO_GIT || protocol == PROTO_SSH) { | |
faea9ccb AE |
1120 | if (path[1] == '~') |
1121 | path++; | |
faea9ccb AE |
1122 | } |
1123 | ||
c59ab2e5 TB |
1124 | path = xstrdup(path); |
1125 | *end = '\0'; | |
1126 | ||
cabc3c12 | 1127 | *ret_host = xstrdup(host); |
c59ab2e5 | 1128 | *ret_path = path; |
cabc3c12 JS |
1129 | free(url); |
1130 | return protocol; | |
1131 | } | |
1132 | ||
3c8ede3f NTND |
1133 | static const char *get_ssh_command(void) |
1134 | { | |
1135 | const char *ssh; | |
1136 | ||
1137 | if ((ssh = getenv("GIT_SSH_COMMAND"))) | |
1138 | return ssh; | |
1139 | ||
f1de981e | 1140 | if (!git_config_get_string_tmp("core.sshcommand", &ssh)) |
3c8ede3f NTND |
1141 | return ssh; |
1142 | ||
1143 | return NULL; | |
1144 | } | |
1145 | ||
94b8ae5a | 1146 | enum ssh_variant { |
0da0e49b | 1147 | VARIANT_AUTO, |
94b8ae5a BW |
1148 | VARIANT_SIMPLE, |
1149 | VARIANT_SSH, | |
1150 | VARIANT_PLINK, | |
1151 | VARIANT_PUTTY, | |
1152 | VARIANT_TORTOISEPLINK, | |
1153 | }; | |
1154 | ||
0da0e49b | 1155 | static void override_ssh_variant(enum ssh_variant *ssh_variant) |
e2824e47 | 1156 | { |
94b8ae5a | 1157 | const char *variant = getenv("GIT_SSH_VARIANT"); |
486c8e8c | 1158 | |
f1de981e | 1159 | if (!variant && git_config_get_string_tmp("ssh.variant", &variant)) |
0da0e49b | 1160 | return; |
486c8e8c | 1161 | |
0da0e49b JN |
1162 | if (!strcmp(variant, "auto")) |
1163 | *ssh_variant = VARIANT_AUTO; | |
1164 | else if (!strcmp(variant, "plink")) | |
94b8ae5a BW |
1165 | *ssh_variant = VARIANT_PLINK; |
1166 | else if (!strcmp(variant, "putty")) | |
1167 | *ssh_variant = VARIANT_PUTTY; | |
1168 | else if (!strcmp(variant, "tortoiseplink")) | |
1169 | *ssh_variant = VARIANT_TORTOISEPLINK; | |
1170 | else if (!strcmp(variant, "simple")) | |
1171 | *ssh_variant = VARIANT_SIMPLE; | |
1172 | else | |
1173 | *ssh_variant = VARIANT_SSH; | |
486c8e8c JH |
1174 | } |
1175 | ||
94b8ae5a BW |
1176 | static enum ssh_variant determine_ssh_variant(const char *ssh_command, |
1177 | int is_cmdline) | |
486c8e8c | 1178 | { |
0da0e49b | 1179 | enum ssh_variant ssh_variant = VARIANT_AUTO; |
486c8e8c | 1180 | const char *variant; |
e2824e47 JS |
1181 | char *p = NULL; |
1182 | ||
0da0e49b JN |
1183 | override_ssh_variant(&ssh_variant); |
1184 | ||
1185 | if (ssh_variant != VARIANT_AUTO) | |
94b8ae5a | 1186 | return ssh_variant; |
486c8e8c JH |
1187 | |
1188 | if (!is_cmdline) { | |
e2824e47 JS |
1189 | p = xstrdup(ssh_command); |
1190 | variant = basename(p); | |
1191 | } else { | |
1192 | const char **ssh_argv; | |
1193 | ||
1194 | p = xstrdup(ssh_command); | |
22e5ae5c | 1195 | if (split_cmdline(p, &ssh_argv) > 0) { |
e2824e47 JS |
1196 | variant = basename((char *)ssh_argv[0]); |
1197 | /* | |
1198 | * At this point, variant points into the buffer | |
1199 | * referenced by p, hence we do not need ssh_argv | |
1200 | * any longer. | |
1201 | */ | |
1202 | free(ssh_argv); | |
5d2993b6 JK |
1203 | } else { |
1204 | free(p); | |
94b8ae5a | 1205 | return ssh_variant; |
5d2993b6 | 1206 | } |
e2824e47 JS |
1207 | } |
1208 | ||
94b8ae5a BW |
1209 | if (!strcasecmp(variant, "ssh") || |
1210 | !strcasecmp(variant, "ssh.exe")) | |
1211 | ssh_variant = VARIANT_SSH; | |
1212 | else if (!strcasecmp(variant, "plink") || | |
1213 | !strcasecmp(variant, "plink.exe")) | |
1214 | ssh_variant = VARIANT_PLINK; | |
e2824e47 | 1215 | else if (!strcasecmp(variant, "tortoiseplink") || |
94b8ae5a BW |
1216 | !strcasecmp(variant, "tortoiseplink.exe")) |
1217 | ssh_variant = VARIANT_TORTOISEPLINK; | |
1218 | ||
e2824e47 | 1219 | free(p); |
94b8ae5a | 1220 | return ssh_variant; |
e2824e47 JS |
1221 | } |
1222 | ||
2ac67cb6 JN |
1223 | /* |
1224 | * Open a connection using Git's native protocol. | |
1225 | * | |
1226 | * The caller is responsible for freeing hostandport, but this function may | |
1227 | * modify it (for example, to truncate it to remove the port part). | |
1228 | */ | |
1229 | static struct child_process *git_connect_git(int fd[2], char *hostandport, | |
1230 | const char *path, const char *prog, | |
40fc51e3 | 1231 | enum protocol_version version, |
2ac67cb6 JN |
1232 | int flags) |
1233 | { | |
1234 | struct child_process *conn; | |
1235 | struct strbuf request = STRBUF_INIT; | |
1236 | /* | |
1237 | * Set up virtual host information based on where we will | |
1238 | * connect, unless the user has overridden us in | |
1239 | * the environment. | |
1240 | */ | |
1241 | char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST"); | |
1242 | if (target_host) | |
1243 | target_host = xstrdup(target_host); | |
1244 | else | |
1245 | target_host = xstrdup(hostandport); | |
1246 | ||
1247 | transport_check_allowed("git"); | |
a02ea577 JK |
1248 | if (strchr(target_host, '\n') || strchr(path, '\n')) |
1249 | die(_("newline is forbidden in git:// hosts and repo paths")); | |
2ac67cb6 | 1250 | |
233cd282 JN |
1251 | /* |
1252 | * These underlying connection commands die() if they | |
2ac67cb6 JN |
1253 | * cannot connect. |
1254 | */ | |
1255 | if (git_use_proxy(hostandport)) | |
1256 | conn = git_proxy_connect(fd, hostandport); | |
1257 | else | |
1258 | conn = git_tcp_connect(fd, hostandport, flags); | |
1259 | /* | |
1260 | * Separate original protocol components prog and path | |
1261 | * from extended host header with a NUL byte. | |
1262 | * | |
1263 | * Note: Do not add any other headers here! Doing so | |
1264 | * will cause older git-daemon servers to crash. | |
1265 | */ | |
1266 | strbuf_addf(&request, | |
1267 | "%s %s%chost=%s%c", | |
1268 | prog, path, 0, | |
1269 | target_host, 0); | |
1270 | ||
1271 | /* If using a new version put that stuff here after a second null byte */ | |
40fc51e3 | 1272 | if (version > 0) { |
2ac67cb6 JN |
1273 | strbuf_addch(&request, '\0'); |
1274 | strbuf_addf(&request, "version=%d%c", | |
40fc51e3 | 1275 | version, '\0'); |
2ac67cb6 JN |
1276 | } |
1277 | ||
1278 | packet_write(fd[1], request.buf, request.len); | |
1279 | ||
1280 | free(target_host); | |
1281 | strbuf_release(&request); | |
1282 | return conn; | |
1283 | } | |
1284 | ||
957e2ad2 JN |
1285 | /* |
1286 | * Append the appropriate environment variables to `env` and options to | |
1287 | * `args` for running ssh in Git's SSH-tunneled transport. | |
1288 | */ | |
ef8d7ac4 | 1289 | static void push_ssh_options(struct strvec *args, struct strvec *env, |
957e2ad2 | 1290 | enum ssh_variant variant, const char *port, |
40fc51e3 | 1291 | enum protocol_version version, int flags) |
957e2ad2 JN |
1292 | { |
1293 | if (variant == VARIANT_SSH && | |
40fc51e3 | 1294 | version > 0) { |
ef8d7ac4 JK |
1295 | strvec_push(args, "-o"); |
1296 | strvec_push(args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT); | |
1297 | strvec_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=version=%d", | |
f6d8942b | 1298 | version); |
957e2ad2 JN |
1299 | } |
1300 | ||
a3f5b66f JN |
1301 | if (flags & CONNECT_IPV4) { |
1302 | switch (variant) { | |
1303 | case VARIANT_AUTO: | |
1304 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1305 | case VARIANT_SIMPLE: | |
aad6fddb | 1306 | die(_("ssh variant 'simple' does not support -4")); |
a3f5b66f JN |
1307 | case VARIANT_SSH: |
1308 | case VARIANT_PLINK: | |
1309 | case VARIANT_PUTTY: | |
1310 | case VARIANT_TORTOISEPLINK: | |
ef8d7ac4 | 1311 | strvec_push(args, "-4"); |
a3f5b66f JN |
1312 | } |
1313 | } else if (flags & CONNECT_IPV6) { | |
1314 | switch (variant) { | |
1315 | case VARIANT_AUTO: | |
1316 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1317 | case VARIANT_SIMPLE: | |
aad6fddb | 1318 | die(_("ssh variant 'simple' does not support -6")); |
a3f5b66f JN |
1319 | case VARIANT_SSH: |
1320 | case VARIANT_PLINK: | |
1321 | case VARIANT_PUTTY: | |
1322 | case VARIANT_TORTOISEPLINK: | |
ef8d7ac4 | 1323 | strvec_push(args, "-6"); |
a3f5b66f | 1324 | } |
957e2ad2 JN |
1325 | } |
1326 | ||
1327 | if (variant == VARIANT_TORTOISEPLINK) | |
ef8d7ac4 | 1328 | strvec_push(args, "-batch"); |
957e2ad2 | 1329 | |
3fa5e0d0 JN |
1330 | if (port) { |
1331 | switch (variant) { | |
1332 | case VARIANT_AUTO: | |
1333 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1334 | case VARIANT_SIMPLE: | |
aad6fddb | 1335 | die(_("ssh variant 'simple' does not support setting port")); |
3fa5e0d0 | 1336 | case VARIANT_SSH: |
ef8d7ac4 | 1337 | strvec_push(args, "-p"); |
3fa5e0d0 JN |
1338 | break; |
1339 | case VARIANT_PLINK: | |
1340 | case VARIANT_PUTTY: | |
1341 | case VARIANT_TORTOISEPLINK: | |
ef8d7ac4 | 1342 | strvec_push(args, "-P"); |
3fa5e0d0 | 1343 | } |
957e2ad2 | 1344 | |
ef8d7ac4 | 1345 | strvec_push(args, port); |
957e2ad2 JN |
1346 | } |
1347 | } | |
1348 | ||
fce54ce4 JN |
1349 | /* Prepare a child_process for use by Git's SSH-tunneled transport. */ |
1350 | static void fill_ssh_args(struct child_process *conn, const char *ssh_host, | |
40fc51e3 BW |
1351 | const char *port, enum protocol_version version, |
1352 | int flags) | |
fce54ce4 JN |
1353 | { |
1354 | const char *ssh; | |
1355 | enum ssh_variant variant; | |
1356 | ||
1357 | if (looks_like_command_line_option(ssh_host)) | |
aad6fddb | 1358 | die(_("strange hostname '%s' blocked"), ssh_host); |
fce54ce4 JN |
1359 | |
1360 | ssh = get_ssh_command(); | |
1361 | if (ssh) { | |
1362 | variant = determine_ssh_variant(ssh, 1); | |
1363 | } else { | |
1364 | /* | |
1365 | * GIT_SSH is the no-shell version of | |
1366 | * GIT_SSH_COMMAND (and must remain so for | |
1367 | * historical compatibility). | |
1368 | */ | |
1369 | conn->use_shell = 0; | |
1370 | ||
1371 | ssh = getenv("GIT_SSH"); | |
1372 | if (!ssh) | |
1373 | ssh = "ssh"; | |
1374 | variant = determine_ssh_variant(ssh, 0); | |
1375 | } | |
1376 | ||
0da0e49b JN |
1377 | if (variant == VARIANT_AUTO) { |
1378 | struct child_process detect = CHILD_PROCESS_INIT; | |
1379 | ||
1380 | detect.use_shell = conn->use_shell; | |
1381 | detect.no_stdin = detect.no_stdout = detect.no_stderr = 1; | |
1382 | ||
ef8d7ac4 JK |
1383 | strvec_push(&detect.args, ssh); |
1384 | strvec_push(&detect.args, "-G"); | |
29fda24d | 1385 | push_ssh_options(&detect.args, &detect.env, |
40fc51e3 | 1386 | VARIANT_SSH, port, version, flags); |
ef8d7ac4 | 1387 | strvec_push(&detect.args, ssh_host); |
0da0e49b JN |
1388 | |
1389 | variant = run_command(&detect) ? VARIANT_SIMPLE : VARIANT_SSH; | |
1390 | } | |
1391 | ||
ef8d7ac4 | 1392 | strvec_push(&conn->args, ssh); |
29fda24d ÆAB |
1393 | push_ssh_options(&conn->args, &conn->env, variant, port, version, |
1394 | flags); | |
ef8d7ac4 | 1395 | strvec_push(&conn->args, ssh_host); |
fce54ce4 JN |
1396 | } |
1397 | ||
cabc3c12 | 1398 | /* |
8e349780 JN |
1399 | * This returns the dummy child_process `no_fork` if the transport protocol |
1400 | * does not need fork(2), or a struct child_process object if it does. Once | |
1401 | * done, finish the connection with finish_connect() with the value returned | |
1402 | * from this function (it is safe to call finish_connect() with NULL to | |
1403 | * support the former case). | |
cabc3c12 JS |
1404 | * |
1405 | * If it returns, the connect is successful; it just dies on errors (this | |
1406 | * will hopefully be changed in a libification effort, to return NULL when | |
1407 | * the connection failed). | |
1408 | */ | |
1409 | struct child_process *git_connect(int fd[2], const char *url, | |
1410 | const char *prog, int flags) | |
1411 | { | |
a2036d7e | 1412 | char *hostandport, *path; |
8e349780 | 1413 | struct child_process *conn; |
cabc3c12 | 1414 | enum protocol protocol; |
40fc51e3 | 1415 | enum protocol_version version = get_protocol_version_config(); |
cabc3c12 | 1416 | |
1aa8dded BW |
1417 | /* |
1418 | * NEEDSWORK: If we are trying to use protocol v2 and we are planning | |
1419 | * to perform a push, then fallback to v0 since the client doesn't know | |
1420 | * how to push yet using v2. | |
1421 | */ | |
1422 | if (version == protocol_v2 && !strcmp("git-receive-pack", prog)) | |
1423 | version = protocol_v0; | |
1424 | ||
cabc3c12 JS |
1425 | /* Without this we cannot rely on waitpid() to tell |
1426 | * what happened to our children. | |
2e776665 | 1427 | */ |
cabc3c12 | 1428 | signal(SIGCHLD, SIG_DFL); |
2e776665 | 1429 | |
a2036d7e | 1430 | protocol = parse_connect_url(url, &hostandport, &path); |
3f55ccab | 1431 | if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) { |
5610b7c0 TB |
1432 | printf("Diag: url=%s\n", url ? url : "NULL"); |
1433 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
a2036d7e | 1434 | printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL"); |
5610b7c0 | 1435 | printf("Diag: path=%s\n", path ? path : "NULL"); |
a2036d7e TB |
1436 | conn = NULL; |
1437 | } else if (protocol == PROTO_GIT) { | |
40fc51e3 | 1438 | conn = git_connect_git(fd, hostandport, path, prog, version, flags); |
abd81a3d | 1439 | conn->trace2_child_class = "transport/git"; |
a2036d7e | 1440 | } else { |
f1399291 | 1441 | struct strbuf cmd = STRBUF_INIT; |
0c2f0d27 | 1442 | const char *const *var; |
f1399291 | 1443 | |
483bbd4e RS |
1444 | conn = xmalloc(sizeof(*conn)); |
1445 | child_process_init(conn); | |
a2036d7e | 1446 | |
aeeb2d49 | 1447 | if (looks_like_command_line_option(path)) |
aad6fddb | 1448 | die(_("strange pathname '%s' blocked"), path); |
aeeb2d49 | 1449 | |
a2036d7e TB |
1450 | strbuf_addstr(&cmd, prog); |
1451 | strbuf_addch(&cmd, ' '); | |
1452 | sq_quote_buf(&cmd, path); | |
1453 | ||
aab40438 | 1454 | /* remove repo-local variables from the environment */ |
0c2f0d27 | 1455 | for (var = local_repo_env; *var; var++) |
29fda24d | 1456 | strvec_push(&conn->env, *var); |
0c2f0d27 | 1457 | |
a48b409f | 1458 | conn->use_shell = 1; |
a2036d7e | 1459 | conn->in = conn->out = -1; |
a2036d7e | 1460 | if (protocol == PROTO_SSH) { |
a2036d7e TB |
1461 | char *ssh_host = hostandport; |
1462 | const char *port = NULL; | |
a5adaced | 1463 | transport_check_allowed("ssh"); |
a2036d7e | 1464 | get_host_and_port(&ssh_host, &port); |
a2036d7e | 1465 | |
86ceb337 TB |
1466 | if (!port) |
1467 | port = get_port(ssh_host); | |
42da4840 | 1468 | |
3f55ccab TB |
1469 | if (flags & CONNECT_DIAG_URL) { |
1470 | printf("Diag: url=%s\n", url ? url : "NULL"); | |
1471 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
1472 | printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL"); | |
1473 | printf("Diag: port=%s\n", port ? port : "NONE"); | |
1474 | printf("Diag: path=%s\n", path ? path : "NULL"); | |
a2036d7e | 1475 | |
3f55ccab TB |
1476 | free(hostandport); |
1477 | free(path); | |
04f20c04 | 1478 | free(conn); |
f1399291 | 1479 | strbuf_release(&cmd); |
3f55ccab | 1480 | return NULL; |
37ee646e | 1481 | } |
abd81a3d | 1482 | conn->trace2_child_class = "transport/ssh"; |
40fc51e3 | 1483 | fill_ssh_args(conn, ssh_host, port, version, flags); |
c049b61d | 1484 | } else { |
a5adaced | 1485 | transport_check_allowed("file"); |
abd81a3d | 1486 | conn->trace2_child_class = "transport/file"; |
40fc51e3 | 1487 | if (version > 0) { |
29fda24d | 1488 | strvec_pushf(&conn->env, |
f6d8942b JK |
1489 | GIT_PROTOCOL_ENVIRONMENT "=version=%d", |
1490 | version); | |
0c2f0d27 | 1491 | } |
4852f723 | 1492 | } |
ef8d7ac4 | 1493 | strvec_push(&conn->args, cmd.buf); |
f364cb88 | 1494 | |
a2036d7e | 1495 | if (start_command(conn)) |
aad6fddb | 1496 | die(_("unable to fork")); |
f364cb88 | 1497 | |
a2036d7e TB |
1498 | fd[0] = conn->out; /* read from child's stdout */ |
1499 | fd[1] = conn->in; /* write to child's stdin */ | |
1500 | strbuf_release(&cmd); | |
1501 | } | |
1502 | free(hostandport); | |
cabc3c12 | 1503 | free(path); |
98158e9c | 1504 | return conn; |
f7192598 LT |
1505 | } |
1506 | ||
98158e9c | 1507 | int finish_connect(struct child_process *conn) |
f7192598 | 1508 | { |
f364cb88 | 1509 | int code; |
7ffe853b | 1510 | if (!conn || git_connection_is_socket(conn)) |
f42a5c4e FBH |
1511 | return 0; |
1512 | ||
f364cb88 | 1513 | code = finish_command(conn); |
98158e9c | 1514 | free(conn); |
f364cb88 | 1515 | return code; |
f7192598 | 1516 | } |