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