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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" |
f7192598 | 18 | |
e52449b6 | 19 | static char *server_capabilities_v1; |
ef8d7ac4 | 20 | static struct strvec server_capabilities_v2 = STRVEC_INIT; |
2c6a403d | 21 | static const char *next_server_feature_value(const char *feature, int *len, int *offset); |
211b5f9e | 22 | |
be0b3f82 | 23 | static int check_ref(const char *name, unsigned int flags) |
2718ff09 LT |
24 | { |
25 | if (!flags) | |
26 | return 1; | |
27 | ||
be0b3f82 | 28 | if (!skip_prefix(name, "refs/", &name)) |
2718ff09 LT |
29 | return 0; |
30 | ||
2718ff09 | 31 | /* REF_NORMAL means that we don't want the magic fake tag refs */ |
8d9c5010 | 32 | if ((flags & REF_NORMAL) && check_refname_format(name, 0)) |
2718ff09 LT |
33 | return 0; |
34 | ||
35 | /* REF_HEADS means that we want regular branch heads */ | |
be0b3f82 | 36 | if ((flags & REF_HEADS) && starts_with(name, "heads/")) |
2718ff09 LT |
37 | return 1; |
38 | ||
39 | /* REF_TAGS means that we want tags */ | |
be0b3f82 | 40 | if ((flags & REF_TAGS) && starts_with(name, "tags/")) |
2718ff09 LT |
41 | return 1; |
42 | ||
43 | /* All type bits clear means that we are ok with anything */ | |
44 | return !(flags & ~REF_NORMAL); | |
45 | } | |
46 | ||
4577370e DB |
47 | int check_ref_type(const struct ref *ref, int flags) |
48 | { | |
be0b3f82 | 49 | return check_ref(ref->name, flags); |
4577370e DB |
50 | } |
51 | ||
d2bff22c | 52 | static NORETURN void die_initial_contact(int unexpected) |
46284dd1 | 53 | { |
7e3e479b BW |
54 | /* |
55 | * A hang-up after seeing some response from the other end | |
56 | * means that it is unexpected, as we know the other end is | |
57 | * willing to talk to us. A hang-up before seeing any | |
58 | * response does not necessarily mean an ACL problem, though. | |
59 | */ | |
55e4f936 | 60 | if (unexpected) |
1a07e59c | 61 | die(_("the remote end hung up upon initial contact")); |
46284dd1 | 62 | else |
f2b93b38 VA |
63 | die(_("Could not read from remote repository.\n\n" |
64 | "Please make sure you have the correct access rights\n" | |
65 | "and the repository exists.")); | |
46284dd1 HV |
66 | } |
67 | ||
e52449b6 BW |
68 | /* Checks if the server supports the capability 'c' */ |
69 | int server_supports_v2(const char *c, int die_on_error) | |
70 | { | |
71 | int i; | |
72 | ||
d70a9eb6 | 73 | for (i = 0; i < server_capabilities_v2.nr; i++) { |
e52449b6 | 74 | const char *out; |
d70a9eb6 | 75 | if (skip_prefix(server_capabilities_v2.v[i], c, &out) && |
e52449b6 BW |
76 | (!*out || *out == '=')) |
77 | return 1; | |
78 | } | |
79 | ||
80 | if (die_on_error) | |
aad6fddb | 81 | die(_("server doesn't support '%s'"), c); |
e52449b6 BW |
82 | |
83 | return 0; | |
84 | } | |
85 | ||
1349ffed | 86 | int server_feature_v2(const char *c, const char **v) |
87 | { | |
88 | int i; | |
89 | ||
d70a9eb6 | 90 | for (i = 0; i < server_capabilities_v2.nr; i++) { |
1349ffed | 91 | const char *out; |
d70a9eb6 | 92 | if (skip_prefix(server_capabilities_v2.v[i], c, &out) && |
1349ffed | 93 | (*out == '=')) { |
94 | *v = out + 1; | |
95 | return 1; | |
96 | } | |
97 | } | |
98 | return 0; | |
99 | } | |
100 | ||
f7e20501 BW |
101 | int server_supports_feature(const char *c, const char *feature, |
102 | int die_on_error) | |
103 | { | |
104 | int i; | |
105 | ||
d70a9eb6 | 106 | for (i = 0; i < server_capabilities_v2.nr; i++) { |
f7e20501 | 107 | const char *out; |
d70a9eb6 | 108 | if (skip_prefix(server_capabilities_v2.v[i], c, &out) && |
f7e20501 BW |
109 | (!*out || *(out++) == '=')) { |
110 | if (parse_feature_request(out, feature)) | |
111 | return 1; | |
112 | else | |
113 | break; | |
114 | } | |
115 | } | |
116 | ||
117 | if (die_on_error) | |
aad6fddb | 118 | die(_("server doesn't support feature '%s'"), feature); |
f7e20501 BW |
119 | |
120 | return 0; | |
121 | } | |
122 | ||
e52449b6 BW |
123 | static void process_capabilities_v2(struct packet_reader *reader) |
124 | { | |
125 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) | |
ef8d7ac4 | 126 | strvec_push(&server_capabilities_v2, reader->line); |
e52449b6 BW |
127 | |
128 | if (reader->status != PACKET_READ_FLUSH) | |
aad6fddb | 129 | die(_("expected flush after capabilities")); |
e52449b6 BW |
130 | } |
131 | ||
ad6ac124 | 132 | enum protocol_version discover_version(struct packet_reader *reader) |
7e3e479b BW |
133 | { |
134 | enum protocol_version version = protocol_unknown_version; | |
135 | ||
136 | /* | |
137 | * Peek the first line of the server's response to | |
138 | * determine the protocol version the server is speaking. | |
139 | */ | |
140 | switch (packet_reader_peek(reader)) { | |
141 | case PACKET_READ_EOF: | |
142 | die_initial_contact(0); | |
143 | case PACKET_READ_FLUSH: | |
144 | case PACKET_READ_DELIM: | |
0181b600 | 145 | case PACKET_READ_RESPONSE_END: |
7e3e479b BW |
146 | version = protocol_v0; |
147 | break; | |
148 | case PACKET_READ_NORMAL: | |
149 | version = determine_protocol_version_client(reader->line); | |
150 | break; | |
151 | } | |
152 | ||
153 | switch (version) { | |
8f6982b4 | 154 | case protocol_v2: |
e52449b6 | 155 | process_capabilities_v2(reader); |
8f6982b4 | 156 | break; |
7e3e479b BW |
157 | case protocol_v1: |
158 | /* Read the peeked version line */ | |
159 | packet_reader_read(reader); | |
160 | break; | |
161 | case protocol_v0: | |
162 | break; | |
163 | case protocol_unknown_version: | |
164 | BUG("unknown protocol version"); | |
165 | } | |
166 | ||
167 | return version; | |
168 | } | |
169 | ||
a45b5f05 JH |
170 | static void parse_one_symref_info(struct string_list *symref, const char *val, int len) |
171 | { | |
172 | char *sym, *target; | |
173 | struct string_list_item *item; | |
174 | ||
175 | if (!len) | |
176 | return; /* just "symref" */ | |
177 | /* e.g. "symref=HEAD:refs/heads/master" */ | |
5c0b13f8 | 178 | sym = xmemdupz(val, len); |
a45b5f05 JH |
179 | target = strchr(sym, ':'); |
180 | if (!target) | |
181 | /* just "symref=something" */ | |
182 | goto reject; | |
183 | *(target++) = '\0'; | |
184 | if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) || | |
185 | check_refname_format(target, REFNAME_ALLOW_ONELEVEL)) | |
186 | /* "symref=bogus:pair */ | |
187 | goto reject; | |
ef4fe561 | 188 | item = string_list_append_nodup(symref, sym); |
a45b5f05 JH |
189 | item->util = target; |
190 | return; | |
191 | reject: | |
192 | free(sym); | |
193 | return; | |
194 | } | |
195 | ||
196 | static void annotate_refs_with_symref_info(struct ref *ref) | |
197 | { | |
198 | struct string_list symref = STRING_LIST_INIT_DUP; | |
2c6a403d | 199 | int offset = 0; |
a45b5f05 | 200 | |
2c6a403d | 201 | while (1) { |
a45b5f05 JH |
202 | int len; |
203 | const char *val; | |
204 | ||
2c6a403d | 205 | val = next_server_feature_value("symref", &len, &offset); |
a45b5f05 JH |
206 | if (!val) |
207 | break; | |
208 | parse_one_symref_info(&symref, val, len); | |
a45b5f05 | 209 | } |
3383e199 | 210 | string_list_sort(&symref); |
a45b5f05 JH |
211 | |
212 | for (; ref; ref = ref->next) { | |
213 | struct string_list_item *item; | |
214 | item = string_list_lookup(&symref, ref->name); | |
215 | if (!item) | |
216 | continue; | |
217 | ref->symref = xstrdup((char *)item->util); | |
218 | } | |
219 | string_list_clear(&symref, 0); | |
220 | } | |
221 | ||
92315e50 | 222 | static void process_capabilities(struct packet_reader *reader, int *linelen) |
2609043d | 223 | { |
7c601dc3 | 224 | const char *feat_val; |
225 | int feat_len; | |
92315e50 | 226 | const char *line = reader->line; |
7e3e479b | 227 | int nul_location = strlen(line); |
92315e50 | 228 | if (nul_location == *linelen) |
0cd83283 | 229 | return; |
e52449b6 | 230 | server_capabilities_v1 = xstrdup(line + nul_location + 1); |
92315e50 | 231 | *linelen = nul_location; |
7c601dc3 | 232 | |
233 | feat_val = server_feature_value("object-format", &feat_len); | |
234 | if (feat_val) { | |
235 | char *hash_name = xstrndup(feat_val, feat_len); | |
236 | int hash_algo = hash_algo_by_name(hash_name); | |
237 | if (hash_algo != GIT_HASH_UNKNOWN) | |
238 | reader->hash_algo = &hash_algos[hash_algo]; | |
239 | free(hash_name); | |
240 | } else { | |
241 | reader->hash_algo = &hash_algos[GIT_HASH_SHA1]; | |
242 | } | |
0cd83283 JT |
243 | } |
244 | ||
92315e50 | 245 | static int process_dummy_ref(const struct packet_reader *reader) |
0cd83283 | 246 | { |
92315e50 | 247 | const char *line = reader->line; |
0cd83283 JT |
248 | struct object_id oid; |
249 | const char *name; | |
250 | ||
7c601dc3 | 251 | if (parse_oid_hex_algop(line, &oid, &name, reader->hash_algo)) |
0cd83283 JT |
252 | return 0; |
253 | if (*name != ' ') | |
254 | return 0; | |
255 | name++; | |
256 | ||
4a7e27e9 | 257 | return oideq(&null_oid, &oid) && !strcmp(name, "capabilities^{}"); |
0cd83283 JT |
258 | } |
259 | ||
7e3e479b | 260 | static void check_no_capabilities(const char *line, int len) |
0cd83283 | 261 | { |
7e3e479b | 262 | if (strlen(line) != len) |
aad6fddb | 263 | warning(_("ignoring capabilities after first line '%s'"), |
7e3e479b | 264 | line + strlen(line)); |
0cd83283 JT |
265 | } |
266 | ||
92315e50 | 267 | static int process_ref(const struct packet_reader *reader, int len, |
268 | struct ref ***list, unsigned int flags, | |
269 | struct oid_array *extra_have) | |
0cd83283 | 270 | { |
92315e50 | 271 | const char *line = reader->line; |
0cd83283 JT |
272 | struct object_id old_oid; |
273 | const char *name; | |
274 | ||
7c601dc3 | 275 | if (parse_oid_hex_algop(line, &old_oid, &name, reader->hash_algo)) |
0cd83283 JT |
276 | return 0; |
277 | if (*name != ' ') | |
278 | return 0; | |
279 | name++; | |
280 | ||
281 | if (extra_have && !strcmp(name, ".have")) { | |
282 | oid_array_append(extra_have, &old_oid); | |
283 | } else if (!strcmp(name, "capabilities^{}")) { | |
aad6fddb | 284 | die(_("protocol error: unexpected capabilities^{}")); |
0cd83283 JT |
285 | } else if (check_ref(name, flags)) { |
286 | struct ref *ref = alloc_ref(name); | |
287 | oidcpy(&ref->old_oid, &old_oid); | |
288 | **list = ref; | |
289 | *list = &ref->next; | |
290 | } | |
7e3e479b | 291 | check_no_capabilities(line, len); |
0cd83283 JT |
292 | return 1; |
293 | } | |
294 | ||
92315e50 | 295 | static int process_shallow(const struct packet_reader *reader, int len, |
7e3e479b | 296 | struct oid_array *shallow_points) |
0cd83283 | 297 | { |
92315e50 | 298 | const char *line = reader->line; |
0cd83283 JT |
299 | const char *arg; |
300 | struct object_id old_oid; | |
301 | ||
7e3e479b | 302 | if (!skip_prefix(line, "shallow ", &arg)) |
0cd83283 JT |
303 | return 0; |
304 | ||
7c601dc3 | 305 | if (get_oid_hex_algop(arg, &old_oid, reader->hash_algo)) |
aad6fddb | 306 | die(_("protocol error: expected shallow sha-1, got '%s'"), arg); |
0cd83283 | 307 | if (!shallow_points) |
aad6fddb | 308 | die(_("repository on the other end cannot be shallow")); |
0cd83283 | 309 | oid_array_append(shallow_points, &old_oid); |
7e3e479b | 310 | check_no_capabilities(line, len); |
0cd83283 JT |
311 | return 1; |
312 | } | |
313 | ||
7e3e479b BW |
314 | enum get_remote_heads_state { |
315 | EXPECTING_FIRST_REF = 0, | |
316 | EXPECTING_REF, | |
317 | EXPECTING_SHALLOW, | |
318 | EXPECTING_DONE, | |
319 | }; | |
320 | ||
d1c133f5 LT |
321 | /* |
322 | * Read all the refs from the other end | |
323 | */ | |
ad6ac124 | 324 | struct ref **get_remote_heads(struct packet_reader *reader, |
85edf4f5 | 325 | struct ref **list, unsigned int flags, |
910650d2 | 326 | struct oid_array *extra_have, |
327 | struct oid_array *shallow_points) | |
d1c133f5 | 328 | { |
a45b5f05 | 329 | struct ref **orig_list = list; |
7e3e479b BW |
330 | int len = 0; |
331 | enum get_remote_heads_state state = EXPECTING_FIRST_REF; | |
55e4f936 | 332 | |
d1c133f5 | 333 | *list = NULL; |
1a7141ff | 334 | |
7e3e479b | 335 | while (state != EXPECTING_DONE) { |
ad6ac124 | 336 | switch (packet_reader_read(reader)) { |
7e3e479b BW |
337 | case PACKET_READ_EOF: |
338 | die_initial_contact(1); | |
339 | case PACKET_READ_NORMAL: | |
ad6ac124 | 340 | len = reader->pktlen; |
7e3e479b BW |
341 | break; |
342 | case PACKET_READ_FLUSH: | |
343 | state = EXPECTING_DONE; | |
344 | break; | |
345 | case PACKET_READ_DELIM: | |
0181b600 | 346 | case PACKET_READ_RESPONSE_END: |
aad6fddb | 347 | die(_("invalid packet")); |
7e3e479b BW |
348 | } |
349 | ||
0cd83283 JT |
350 | switch (state) { |
351 | case EXPECTING_FIRST_REF: | |
92315e50 | 352 | process_capabilities(reader, &len); |
353 | if (process_dummy_ref(reader)) { | |
0cd83283 JT |
354 | state = EXPECTING_SHALLOW; |
355 | break; | |
356 | } | |
357 | state = EXPECTING_REF; | |
358 | /* fallthrough */ | |
359 | case EXPECTING_REF: | |
92315e50 | 360 | if (process_ref(reader, len, &list, flags, extra_have)) |
0cd83283 JT |
361 | break; |
362 | state = EXPECTING_SHALLOW; | |
363 | /* fallthrough */ | |
364 | case EXPECTING_SHALLOW: | |
92315e50 | 365 | if (process_shallow(reader, len, shallow_points)) |
0cd83283 | 366 | break; |
aad6fddb | 367 | die(_("protocol error: unexpected '%s'"), reader->line); |
7e3e479b BW |
368 | case EXPECTING_DONE: |
369 | break; | |
211b5f9e | 370 | } |
d1c133f5 | 371 | } |
a45b5f05 JH |
372 | |
373 | annotate_refs_with_symref_info(*orig_list); | |
374 | ||
d1c133f5 LT |
375 | return list; |
376 | } | |
377 | ||
e52449b6 | 378 | /* Returns 1 when a valid ref has been added to `list`, 0 otherwise */ |
67e9a707 | 379 | static int process_ref_v2(struct packet_reader *reader, struct ref ***list) |
e52449b6 BW |
380 | { |
381 | int ret = 1; | |
382 | int i = 0; | |
383 | struct object_id old_oid; | |
384 | struct ref *ref; | |
385 | struct string_list line_sections = STRING_LIST_INIT_DUP; | |
386 | const char *end; | |
67e9a707 | 387 | const char *line = reader->line; |
e52449b6 BW |
388 | |
389 | /* | |
390 | * Ref lines have a number of fields which are space deliminated. The | |
391 | * first field is the OID of the ref. The second field is the ref | |
392 | * name. Subsequent fields (symref-target and peeled) are optional and | |
393 | * don't have a particular order. | |
394 | */ | |
395 | if (string_list_split(&line_sections, line, ' ', -1) < 2) { | |
396 | ret = 0; | |
397 | goto out; | |
398 | } | |
399 | ||
ab67235b | 400 | if (parse_oid_hex_algop(line_sections.items[i++].string, &old_oid, &end, reader->hash_algo) || |
e52449b6 BW |
401 | *end) { |
402 | ret = 0; | |
403 | goto out; | |
404 | } | |
405 | ||
406 | ref = alloc_ref(line_sections.items[i++].string); | |
407 | ||
ab67235b | 408 | memcpy(ref->old_oid.hash, old_oid.hash, reader->hash_algo->rawsz); |
e52449b6 BW |
409 | **list = ref; |
410 | *list = &ref->next; | |
411 | ||
412 | for (; i < line_sections.nr; i++) { | |
413 | const char *arg = line_sections.items[i].string; | |
414 | if (skip_prefix(arg, "symref-target:", &arg)) | |
415 | ref->symref = xstrdup(arg); | |
416 | ||
417 | if (skip_prefix(arg, "peeled:", &arg)) { | |
418 | struct object_id peeled_oid; | |
419 | char *peeled_name; | |
420 | struct ref *peeled; | |
ab67235b | 421 | if (parse_oid_hex_algop(arg, &peeled_oid, &end, |
422 | reader->hash_algo) || *end) { | |
e52449b6 BW |
423 | ret = 0; |
424 | goto out; | |
425 | } | |
426 | ||
427 | peeled_name = xstrfmt("%s^{}", ref->name); | |
428 | peeled = alloc_ref(peeled_name); | |
429 | ||
ab67235b | 430 | memcpy(peeled->old_oid.hash, peeled_oid.hash, |
431 | reader->hash_algo->rawsz); | |
e52449b6 BW |
432 | **list = peeled; |
433 | *list = &peeled->next; | |
434 | ||
435 | free(peeled_name); | |
436 | } | |
437 | } | |
438 | ||
439 | out: | |
440 | string_list_clear(&line_sections, 0); | |
441 | return ret; | |
442 | } | |
443 | ||
b0df0c16 DL |
444 | void check_stateless_delimiter(int stateless_rpc, |
445 | struct packet_reader *reader, | |
446 | const char *error) | |
447 | { | |
448 | if (!stateless_rpc) | |
449 | return; /* not in stateless mode, no delimiter expected */ | |
450 | if (packet_reader_read(reader) != PACKET_READ_RESPONSE_END) | |
451 | die("%s", error); | |
452 | } | |
453 | ||
e52449b6 BW |
454 | struct ref **get_remote_refs(int fd_out, struct packet_reader *reader, |
455 | struct ref **list, int for_push, | |
ef8d7ac4 | 456 | const struct strvec *ref_prefixes, |
b0df0c16 DL |
457 | const struct string_list *server_options, |
458 | int stateless_rpc) | |
e52449b6 BW |
459 | { |
460 | int i; | |
ab67235b | 461 | const char *hash_name; |
e52449b6 BW |
462 | *list = NULL; |
463 | ||
464 | if (server_supports_v2("ls-refs", 1)) | |
465 | packet_write_fmt(fd_out, "command=ls-refs\n"); | |
466 | ||
467 | if (server_supports_v2("agent", 0)) | |
468 | packet_write_fmt(fd_out, "agent=%s", git_user_agent_sanitized()); | |
469 | ||
ab67235b | 470 | if (server_feature_v2("object-format", &hash_name)) { |
471 | int hash_algo = hash_algo_by_name(hash_name); | |
472 | if (hash_algo == GIT_HASH_UNKNOWN) | |
473 | die(_("unknown object format '%s' specified by server"), hash_name); | |
474 | reader->hash_algo = &hash_algos[hash_algo]; | |
475 | packet_write_fmt(fd_out, "object-format=%s", reader->hash_algo->name); | |
9de0dd36 | 476 | } else { |
477 | reader->hash_algo = &hash_algos[GIT_HASH_SHA1]; | |
ab67235b | 478 | } |
479 | ||
ff473221 BW |
480 | if (server_options && server_options->nr && |
481 | server_supports_v2("server-option", 1)) | |
482 | for (i = 0; i < server_options->nr; i++) | |
483 | packet_write_fmt(fd_out, "server-option=%s", | |
484 | server_options->items[i].string); | |
485 | ||
e52449b6 BW |
486 | packet_delim(fd_out); |
487 | /* When pushing we don't want to request the peeled tags */ | |
488 | if (!for_push) | |
489 | packet_write_fmt(fd_out, "peel\n"); | |
490 | packet_write_fmt(fd_out, "symrefs\n"); | |
d70a9eb6 | 491 | for (i = 0; ref_prefixes && i < ref_prefixes->nr; i++) { |
e52449b6 | 492 | packet_write_fmt(fd_out, "ref-prefix %s\n", |
d70a9eb6 | 493 | ref_prefixes->v[i]); |
e52449b6 BW |
494 | } |
495 | packet_flush(fd_out); | |
496 | ||
497 | /* Process response from server */ | |
498 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
67e9a707 | 499 | if (!process_ref_v2(reader, &list)) |
aad6fddb | 500 | die(_("invalid ls-refs response: %s"), reader->line); |
e52449b6 BW |
501 | } |
502 | ||
503 | if (reader->status != PACKET_READ_FLUSH) | |
aad6fddb | 504 | die(_("expected flush after ref listing")); |
e52449b6 | 505 | |
b0df0c16 DL |
506 | check_stateless_delimiter(stateless_rpc, reader, |
507 | _("expected response end packet after ref listing")); | |
508 | ||
e52449b6 BW |
509 | return list; |
510 | } | |
511 | ||
84eca27a | 512 | const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp, int *offset) |
f47182c8 JH |
513 | { |
514 | int len; | |
515 | ||
516 | if (!feature_list) | |
517 | return NULL; | |
518 | ||
519 | len = strlen(feature); | |
2c6a403d | 520 | if (offset) |
521 | feature_list += *offset; | |
f47182c8 JH |
522 | while (*feature_list) { |
523 | const char *found = strstr(feature_list, feature); | |
524 | if (!found) | |
525 | return NULL; | |
94427108 JK |
526 | if (feature_list == found || isspace(found[-1])) { |
527 | const char *value = found + len; | |
528 | /* feature with no value (e.g., "thin-pack") */ | |
529 | if (!*value || isspace(*value)) { | |
530 | if (lenp) | |
531 | *lenp = 0; | |
532 | return value; | |
533 | } | |
534 | /* feature with a value (e.g., "agent=git/1.2.3") */ | |
535 | else if (*value == '=') { | |
2c6a403d | 536 | int end; |
537 | ||
94427108 | 538 | value++; |
2c6a403d | 539 | end = strcspn(value, " \t\n"); |
94427108 | 540 | if (lenp) |
2c6a403d | 541 | *lenp = end; |
542 | if (offset) | |
543 | *offset = value + end - feature_list; | |
94427108 JK |
544 | return value; |
545 | } | |
546 | /* | |
547 | * otherwise we matched a substring of another feature; | |
548 | * keep looking | |
549 | */ | |
550 | } | |
f47182c8 JH |
551 | feature_list = found + 1; |
552 | } | |
553 | return NULL; | |
211b5f9e JS |
554 | } |
555 | ||
122037c2 | 556 | int server_supports_hash(const char *desired, int *feature_supported) |
557 | { | |
558 | int offset = 0; | |
559 | int len; | |
560 | const char *hash; | |
561 | ||
562 | hash = next_server_feature_value("object-format", &len, &offset); | |
563 | if (feature_supported) | |
564 | *feature_supported = !!hash; | |
565 | if (!hash) { | |
566 | hash = hash_algos[GIT_HASH_SHA1].name; | |
567 | len = strlen(hash); | |
568 | } | |
569 | while (hash) { | |
570 | if (!xstrncmpz(desired, hash, len)) | |
571 | return 1; | |
572 | ||
573 | hash = next_server_feature_value("object-format", &len, &offset); | |
574 | } | |
575 | return 0; | |
576 | } | |
577 | ||
94427108 JK |
578 | int parse_feature_request(const char *feature_list, const char *feature) |
579 | { | |
2c6a403d | 580 | return !!parse_feature_value(feature_list, feature, NULL, NULL); |
581 | } | |
582 | ||
583 | static const char *next_server_feature_value(const char *feature, int *len, int *offset) | |
584 | { | |
585 | return parse_feature_value(server_capabilities_v1, feature, len, offset); | |
94427108 JK |
586 | } |
587 | ||
588 | const char *server_feature_value(const char *feature, int *len) | |
589 | { | |
2c6a403d | 590 | return parse_feature_value(server_capabilities_v1, feature, len, NULL); |
94427108 JK |
591 | } |
592 | ||
593 | int server_supports(const char *feature) | |
594 | { | |
595 | return !!server_feature_value(feature, NULL); | |
596 | } | |
597 | ||
2386d658 LT |
598 | enum protocol { |
599 | PROTO_LOCAL = 1, | |
c59ab2e5 | 600 | PROTO_FILE, |
2386d658 | 601 | PROTO_SSH, |
4b05548f | 602 | PROTO_GIT |
2386d658 LT |
603 | }; |
604 | ||
c59ab2e5 TB |
605 | int url_is_local_not_ssh(const char *url) |
606 | { | |
607 | const char *colon = strchr(url, ':'); | |
608 | const char *slash = strchr(url, '/'); | |
609 | return !colon || (slash && slash < colon) || | |
f82a97eb | 610 | (has_dos_drive_prefix(url) && is_valid_path(url)); |
c59ab2e5 TB |
611 | } |
612 | ||
5610b7c0 TB |
613 | static const char *prot_name(enum protocol protocol) |
614 | { | |
615 | switch (protocol) { | |
616 | case PROTO_LOCAL: | |
c59ab2e5 | 617 | case PROTO_FILE: |
5610b7c0 TB |
618 | return "file"; |
619 | case PROTO_SSH: | |
620 | return "ssh"; | |
621 | case PROTO_GIT: | |
622 | return "git"; | |
623 | default: | |
83e6bda3 | 624 | return "unknown protocol"; |
5610b7c0 TB |
625 | } |
626 | } | |
627 | ||
2386d658 LT |
628 | static enum protocol get_protocol(const char *name) |
629 | { | |
630 | if (!strcmp(name, "ssh")) | |
631 | return PROTO_SSH; | |
632 | if (!strcmp(name, "git")) | |
633 | return PROTO_GIT; | |
07c7782c | 634 | if (!strcmp(name, "git+ssh")) /* deprecated - do not use */ |
c05186cc | 635 | return PROTO_SSH; |
07c7782c | 636 | if (!strcmp(name, "ssh+git")) /* deprecated - do not use */ |
c05186cc | 637 | return PROTO_SSH; |
72a4f4b6 | 638 | if (!strcmp(name, "file")) |
c59ab2e5 | 639 | return PROTO_FILE; |
aad6fddb | 640 | die(_("protocol '%s' is not supported"), name); |
2386d658 LT |
641 | } |
642 | ||
86ceb337 TB |
643 | static char *host_end(char **hoststart, int removebrackets) |
644 | { | |
645 | char *host = *hoststart; | |
646 | char *end; | |
647 | char *start = strstr(host, "@["); | |
648 | if (start) | |
649 | start++; /* Jump over '@' */ | |
650 | else | |
651 | start = host; | |
652 | if (start[0] == '[') { | |
653 | end = strchr(start + 1, ']'); | |
654 | if (end) { | |
655 | if (removebrackets) { | |
656 | *end = 0; | |
657 | memmove(start, start + 1, end - start); | |
658 | end++; | |
659 | } | |
660 | } else | |
661 | end = host; | |
662 | } else | |
663 | end = host; | |
664 | return end; | |
665 | } | |
666 | ||
5ba88448 YH |
667 | #define STR_(s) # s |
668 | #define STR(s) STR_(s) | |
2386d658 | 669 | |
72a534da ML |
670 | static void get_host_and_port(char **host, const char **port) |
671 | { | |
672 | char *colon, *end; | |
86ceb337 | 673 | end = host_end(host, 1); |
72a534da | 674 | colon = strchr(end, ':'); |
72a534da | 675 | if (colon) { |
86ceb337 TB |
676 | long portnr = strtol(colon + 1, &end, 10); |
677 | if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) { | |
678 | *colon = 0; | |
679 | *port = colon + 1; | |
6b6c5f7a TB |
680 | } else if (!colon[1]) { |
681 | *colon = 0; | |
86ceb337 | 682 | } |
72a534da ML |
683 | } |
684 | } | |
685 | ||
e47a8583 EW |
686 | static void enable_keepalive(int sockfd) |
687 | { | |
688 | int ka = 1; | |
689 | ||
690 | if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0) | |
aad6fddb | 691 | error_errno(_("unable to set SO_KEEPALIVE on socket")); |
e47a8583 EW |
692 | } |
693 | ||
49744d63 | 694 | #ifndef NO_IPV6 |
4c505f71 | 695 | |
ba505322 AR |
696 | static const char *ai_name(const struct addrinfo *ai) |
697 | { | |
785a9857 BK |
698 | static char addr[NI_MAXHOST]; |
699 | if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0, | |
700 | NI_NUMERICHOST) != 0) | |
5096d490 | 701 | xsnprintf(addr, sizeof(addr), "(unknown)"); |
785a9857 | 702 | |
ba505322 AR |
703 | return addr; |
704 | } | |
705 | ||
5ad312be JL |
706 | /* |
707 | * Returns a connected socket() fd, or else die()s. | |
708 | */ | |
7841ce79 | 709 | static int git_tcp_connect_sock(char *host, int flags) |
2386d658 | 710 | { |
63a995b6 DZ |
711 | struct strbuf error_message = STRBUF_INIT; |
712 | int sockfd = -1; | |
554fe20d | 713 | const char *port = STR(DEFAULT_GIT_PORT); |
5ba88448 YH |
714 | struct addrinfo hints, *ai0, *ai; |
715 | int gai; | |
ba505322 | 716 | int cnt = 0; |
5ba88448 | 717 | |
72a534da ML |
718 | get_host_and_port(&host, &port); |
719 | if (!*port) | |
720 | port = "<none>"; | |
5ba88448 YH |
721 | |
722 | memset(&hints, 0, sizeof(hints)); | |
c915f11e EW |
723 | if (flags & CONNECT_IPV4) |
724 | hints.ai_family = AF_INET; | |
725 | else if (flags & CONNECT_IPV6) | |
726 | hints.ai_family = AF_INET6; | |
5ba88448 YH |
727 | hints.ai_socktype = SOCK_STREAM; |
728 | hints.ai_protocol = IPPROTO_TCP; | |
729 | ||
7841ce79 | 730 | if (flags & CONNECT_VERBOSE) |
aad6fddb | 731 | fprintf(stderr, _("Looking up %s ... "), host); |
7841ce79 | 732 | |
5ba88448 YH |
733 | gai = getaddrinfo(host, port, &hints, &ai); |
734 | if (gai) | |
aad6fddb | 735 | die(_("unable to look up %s (port %s) (%s)"), host, port, gai_strerror(gai)); |
5ba88448 | 736 | |
7841ce79 | 737 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
738 | /* TRANSLATORS: this is the end of "Looking up %s ... " */ |
739 | fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port); | |
7841ce79 | 740 | |
e08afecd | 741 | for (ai0 = ai; ai; ai = ai->ai_next, cnt++) { |
5ad312be JL |
742 | sockfd = socket(ai->ai_family, |
743 | ai->ai_socktype, ai->ai_protocol); | |
63a995b6 DZ |
744 | if ((sockfd < 0) || |
745 | (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) { | |
746 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
747 | host, cnt, ai_name(ai), strerror(errno)); | |
748 | if (0 <= sockfd) | |
749 | close(sockfd); | |
5ba88448 YH |
750 | sockfd = -1; |
751 | continue; | |
2386d658 | 752 | } |
ba505322 AR |
753 | if (flags & CONNECT_VERBOSE) |
754 | fprintf(stderr, "%s ", ai_name(ai)); | |
5ba88448 | 755 | break; |
2386d658 LT |
756 | } |
757 | ||
5ba88448 | 758 | freeaddrinfo(ai0); |
2386d658 | 759 | |
2386d658 | 760 | if (sockfd < 0) |
aad6fddb | 761 | die(_("unable to connect to %s:\n%s"), host, error_message.buf); |
5ba88448 | 762 | |
e47a8583 EW |
763 | enable_keepalive(sockfd); |
764 | ||
7841ce79 | 765 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
766 | /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */ |
767 | fprintf_ln(stderr, _("done.")); | |
7841ce79 | 768 | |
63a995b6 DZ |
769 | strbuf_release(&error_message); |
770 | ||
5ad312be | 771 | return sockfd; |
2386d658 LT |
772 | } |
773 | ||
49744d63 | 774 | #else /* NO_IPV6 */ |
4c505f71 | 775 | |
5ad312be JL |
776 | /* |
777 | * Returns a connected socket() fd, or else die()s. | |
778 | */ | |
7841ce79 | 779 | static int git_tcp_connect_sock(char *host, int flags) |
4c505f71 | 780 | { |
7203a2d1 EFL |
781 | struct strbuf error_message = STRBUF_INIT; |
782 | int sockfd = -1; | |
72a534da ML |
783 | const char *port = STR(DEFAULT_GIT_PORT); |
784 | char *ep; | |
4c505f71 PA |
785 | struct hostent *he; |
786 | struct sockaddr_in sa; | |
787 | char **ap; | |
788 | unsigned int nport; | |
ba505322 | 789 | int cnt; |
4c505f71 | 790 | |
72a534da | 791 | get_host_and_port(&host, &port); |
4c505f71 | 792 | |
7841ce79 | 793 | if (flags & CONNECT_VERBOSE) |
aad6fddb | 794 | fprintf(stderr, _("Looking up %s ... "), host); |
7841ce79 | 795 | |
4c505f71 PA |
796 | he = gethostbyname(host); |
797 | if (!he) | |
aad6fddb | 798 | die(_("unable to look up %s (%s)"), host, hstrerror(h_errno)); |
4c505f71 PA |
799 | nport = strtoul(port, &ep, 10); |
800 | if ( ep == port || *ep ) { | |
801 | /* Not numeric */ | |
802 | struct servent *se = getservbyname(port,"tcp"); | |
803 | if ( !se ) | |
aad6fddb | 804 | die(_("unknown port %s"), port); |
4c505f71 PA |
805 | nport = se->s_port; |
806 | } | |
807 | ||
7841ce79 | 808 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
809 | /* TRANSLATORS: this is the end of "Looking up %s ... " */ |
810 | fprintf(stderr, _("done.\nConnecting to %s (port %s) ... "), host, port); | |
7841ce79 | 811 | |
ba505322 | 812 | for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) { |
4c505f71 PA |
813 | memset(&sa, 0, sizeof sa); |
814 | sa.sin_family = he->h_addrtype; | |
6573faff | 815 | sa.sin_port = htons(nport); |
c6164218 | 816 | memcpy(&sa.sin_addr, *ap, he->h_length); |
4c505f71 | 817 | |
7203a2d1 EFL |
818 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); |
819 | if ((sockfd < 0) || | |
820 | connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
821 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
ba505322 AR |
822 | host, |
823 | cnt, | |
824 | inet_ntoa(*(struct in_addr *)&sa.sin_addr), | |
7203a2d1 EFL |
825 | strerror(errno)); |
826 | if (0 <= sockfd) | |
827 | close(sockfd); | |
4c505f71 PA |
828 | sockfd = -1; |
829 | continue; | |
830 | } | |
ba505322 AR |
831 | if (flags & CONNECT_VERBOSE) |
832 | fprintf(stderr, "%s ", | |
833 | inet_ntoa(*(struct in_addr *)&sa.sin_addr)); | |
4c505f71 PA |
834 | break; |
835 | } | |
836 | ||
837 | if (sockfd < 0) | |
aad6fddb | 838 | die(_("unable to connect to %s:\n%s"), host, error_message.buf); |
4c505f71 | 839 | |
e47a8583 EW |
840 | enable_keepalive(sockfd); |
841 | ||
7841ce79 | 842 | if (flags & CONNECT_VERBOSE) |
aad6fddb NTND |
843 | /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */ |
844 | fprintf_ln(stderr, _("done.")); | |
7841ce79 | 845 | |
5ad312be JL |
846 | return sockfd; |
847 | } | |
848 | ||
849 | #endif /* NO_IPV6 */ | |
850 | ||
851 | ||
8e349780 JN |
852 | /* |
853 | * Dummy child_process returned by git_connect() if the transport protocol | |
854 | * does not need fork(2). | |
855 | */ | |
856 | static struct child_process no_fork = CHILD_PROCESS_INIT; | |
857 | ||
858 | int git_connection_is_socket(struct child_process *conn) | |
859 | { | |
860 | return conn == &no_fork; | |
861 | } | |
862 | ||
863 | static struct child_process *git_tcp_connect(int fd[2], char *host, int flags) | |
5ad312be | 864 | { |
7841ce79 | 865 | int sockfd = git_tcp_connect_sock(host, flags); |
5ad312be | 866 | |
4c505f71 | 867 | fd[0] = sockfd; |
ec587fde | 868 | fd[1] = dup(sockfd); |
8e349780 JN |
869 | |
870 | return &no_fork; | |
4c505f71 PA |
871 | } |
872 | ||
4c505f71 | 873 | |
96f1e58f | 874 | static char *git_proxy_command; |
f8014776 | 875 | |
ef90d6d4 JS |
876 | static int git_proxy_command_options(const char *var, const char *value, |
877 | void *cb) | |
f8014776 | 878 | { |
e814bc4d | 879 | if (!strcmp(var, "core.gitproxy")) { |
c3df8568 YH |
880 | const char *for_pos; |
881 | int matchlen = -1; | |
882 | int hostlen; | |
15112c95 EFL |
883 | const char *rhost_name = cb; |
884 | int rhost_len = strlen(rhost_name); | |
c3df8568 | 885 | |
e814bc4d | 886 | if (git_proxy_command) |
f8014776 | 887 | return 0; |
c64b9ad0 JH |
888 | if (!value) |
889 | return config_error_nonbool(var); | |
e814bc4d JH |
890 | /* [core] |
891 | * ;# matches www.kernel.org as well | |
892 | * gitproxy = netcatter-1 for kernel.org | |
893 | * gitproxy = netcatter-2 for sample.xz | |
894 | * gitproxy = netcatter-default | |
895 | */ | |
c3df8568 | 896 | for_pos = strstr(value, " for "); |
e814bc4d JH |
897 | if (!for_pos) |
898 | /* matches everybody */ | |
899 | matchlen = strlen(value); | |
900 | else { | |
901 | hostlen = strlen(for_pos + 5); | |
902 | if (rhost_len < hostlen) | |
903 | matchlen = -1; | |
904 | else if (!strncmp(for_pos + 5, | |
905 | rhost_name + rhost_len - hostlen, | |
906 | hostlen) && | |
907 | ((rhost_len == hostlen) || | |
908 | rhost_name[rhost_len - hostlen -1] == '.')) | |
909 | matchlen = for_pos - value; | |
910 | else | |
911 | matchlen = -1; | |
912 | } | |
913 | if (0 <= matchlen) { | |
914 | /* core.gitproxy = none for kernel.org */ | |
a6080a0a | 915 | if (matchlen == 4 && |
e814bc4d JH |
916 | !memcmp(value, "none", 4)) |
917 | matchlen = 0; | |
182af834 | 918 | git_proxy_command = xmemdupz(value, matchlen); |
f8014776 | 919 | } |
e814bc4d | 920 | return 0; |
f8014776 PC |
921 | } |
922 | ||
ef90d6d4 | 923 | return git_default_config(var, value, cb); |
f8014776 PC |
924 | } |
925 | ||
e814bc4d | 926 | static int git_use_proxy(const char *host) |
f8014776 PC |
927 | { |
928 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); | |
15112c95 | 929 | git_config(git_proxy_command_options, (void*)host); |
e814bc4d | 930 | return (git_proxy_command && *git_proxy_command); |
f8014776 PC |
931 | } |
932 | ||
5cbf8246 | 933 | static struct child_process *git_proxy_connect(int fd[2], char *host) |
f8014776 | 934 | { |
554fe20d | 935 | const char *port = STR(DEFAULT_GIT_PORT); |
5cbf8246 | 936 | struct child_process *proxy; |
f8014776 | 937 | |
72a534da | 938 | get_host_and_port(&host, &port); |
f8014776 | 939 | |
3be4cf09 | 940 | if (looks_like_command_line_option(host)) |
aad6fddb | 941 | die(_("strange hostname '%s' blocked"), host); |
3be4cf09 | 942 | if (looks_like_command_line_option(port)) |
aad6fddb | 943 | die(_("strange port '%s' blocked"), port); |
3be4cf09 | 944 | |
483bbd4e RS |
945 | proxy = xmalloc(sizeof(*proxy)); |
946 | child_process_init(proxy); | |
ef8d7ac4 JK |
947 | strvec_push(&proxy->args, git_proxy_command); |
948 | strvec_push(&proxy->args, host); | |
949 | strvec_push(&proxy->args, port); | |
5cbf8246 JK |
950 | proxy->in = -1; |
951 | proxy->out = -1; | |
952 | if (start_command(proxy)) | |
aad6fddb | 953 | die(_("cannot start proxy %s"), git_proxy_command); |
5cbf8246 JK |
954 | fd[0] = proxy->out; /* read from proxy stdout */ |
955 | fd[1] = proxy->in; /* write to proxy stdin */ | |
956 | return proxy; | |
f8014776 PC |
957 | } |
958 | ||
86ceb337 | 959 | static char *get_port(char *host) |
2e776665 LT |
960 | { |
961 | char *end; | |
86ceb337 TB |
962 | char *p = strchr(host, ':'); |
963 | ||
2e776665 | 964 | if (p) { |
8f148253 RS |
965 | long port = strtol(p + 1, &end, 10); |
966 | if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) { | |
86ceb337 TB |
967 | *p = '\0'; |
968 | return p+1; | |
2e776665 LT |
969 | } |
970 | } | |
971 | ||
972 | return NULL; | |
973 | } | |
974 | ||
f7192598 | 975 | /* |
cabc3c12 JS |
976 | * Extract protocol and relevant parts from the specified connection URL. |
977 | * The caller must free() the returned strings. | |
f7192598 | 978 | */ |
cabc3c12 | 979 | static enum protocol parse_connect_url(const char *url_orig, char **ret_host, |
83b05875 | 980 | char **ret_path) |
f7192598 | 981 | { |
9d2e9420 | 982 | char *url; |
8e76bf3f | 983 | char *host, *path; |
356bece0 | 984 | char *end; |
c59ab2e5 | 985 | int separator = '/'; |
faea9ccb | 986 | enum protocol protocol = PROTO_LOCAL; |
f0b7367c | 987 | |
9d2e9420 JK |
988 | if (is_url(url_orig)) |
989 | url = url_decode(url_orig); | |
990 | else | |
991 | url = xstrdup(url_orig); | |
992 | ||
faea9ccb | 993 | host = strstr(url, "://"); |
eeefa7c9 | 994 | if (host) { |
faea9ccb AE |
995 | *host = '\0'; |
996 | protocol = get_protocol(url); | |
997 | host += 3; | |
356bece0 | 998 | } else { |
f7192598 | 999 | host = url; |
c59ab2e5 TB |
1000 | if (!url_is_local_not_ssh(url)) { |
1001 | protocol = PROTO_SSH; | |
1002 | separator = ':'; | |
1003 | } | |
356bece0 YH |
1004 | } |
1005 | ||
9aa5053d | 1006 | /* |
83b05875 TB |
1007 | * Don't do destructive transforms as protocol code does |
1008 | * '[]' unwrapping in get_host_and_port() | |
9aa5053d | 1009 | */ |
86ceb337 | 1010 | end = host_end(&host, 0); |
356bece0 | 1011 | |
c59ab2e5 | 1012 | if (protocol == PROTO_LOCAL) |
72a4f4b6 | 1013 | path = end; |
ebb8d2c9 TB |
1014 | else if (protocol == PROTO_FILE && *host != '/' && |
1015 | !has_dos_drive_prefix(host) && | |
1016 | offset_1st_component(host - 2) > 1) | |
1017 | path = host - 2; /* include the leading "//" */ | |
c59ab2e5 TB |
1018 | else if (protocol == PROTO_FILE && has_dos_drive_prefix(end)) |
1019 | path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */ | |
1020 | else | |
1021 | path = strchr(end, separator); | |
2386d658 | 1022 | |
faea9ccb | 1023 | if (!path || !*path) |
aad6fddb | 1024 | die(_("no path specified; see 'git help pull' for valid url syntax")); |
faea9ccb AE |
1025 | |
1026 | /* | |
1027 | * null-terminate hostname and point path to ~ for URL's like this: | |
1028 | * ssh://host.xz/~user/repo | |
1029 | */ | |
c59ab2e5 TB |
1030 | |
1031 | end = path; /* Need to \0 terminate host here */ | |
1032 | if (separator == ':') | |
1033 | path++; /* path starts after ':' */ | |
1034 | if (protocol == PROTO_GIT || protocol == PROTO_SSH) { | |
faea9ccb AE |
1035 | if (path[1] == '~') |
1036 | path++; | |
faea9ccb AE |
1037 | } |
1038 | ||
c59ab2e5 TB |
1039 | path = xstrdup(path); |
1040 | *end = '\0'; | |
1041 | ||
cabc3c12 | 1042 | *ret_host = xstrdup(host); |
c59ab2e5 | 1043 | *ret_path = path; |
cabc3c12 JS |
1044 | free(url); |
1045 | return protocol; | |
1046 | } | |
1047 | ||
3c8ede3f NTND |
1048 | static const char *get_ssh_command(void) |
1049 | { | |
1050 | const char *ssh; | |
1051 | ||
1052 | if ((ssh = getenv("GIT_SSH_COMMAND"))) | |
1053 | return ssh; | |
1054 | ||
1055 | if (!git_config_get_string_const("core.sshcommand", &ssh)) | |
1056 | return ssh; | |
1057 | ||
1058 | return NULL; | |
1059 | } | |
1060 | ||
94b8ae5a | 1061 | enum ssh_variant { |
0da0e49b | 1062 | VARIANT_AUTO, |
94b8ae5a BW |
1063 | VARIANT_SIMPLE, |
1064 | VARIANT_SSH, | |
1065 | VARIANT_PLINK, | |
1066 | VARIANT_PUTTY, | |
1067 | VARIANT_TORTOISEPLINK, | |
1068 | }; | |
1069 | ||
0da0e49b | 1070 | static void override_ssh_variant(enum ssh_variant *ssh_variant) |
e2824e47 | 1071 | { |
94b8ae5a | 1072 | const char *variant = getenv("GIT_SSH_VARIANT"); |
486c8e8c | 1073 | |
94b8ae5a | 1074 | if (!variant && git_config_get_string_const("ssh.variant", &variant)) |
0da0e49b | 1075 | return; |
486c8e8c | 1076 | |
0da0e49b JN |
1077 | if (!strcmp(variant, "auto")) |
1078 | *ssh_variant = VARIANT_AUTO; | |
1079 | else if (!strcmp(variant, "plink")) | |
94b8ae5a BW |
1080 | *ssh_variant = VARIANT_PLINK; |
1081 | else if (!strcmp(variant, "putty")) | |
1082 | *ssh_variant = VARIANT_PUTTY; | |
1083 | else if (!strcmp(variant, "tortoiseplink")) | |
1084 | *ssh_variant = VARIANT_TORTOISEPLINK; | |
1085 | else if (!strcmp(variant, "simple")) | |
1086 | *ssh_variant = VARIANT_SIMPLE; | |
1087 | else | |
1088 | *ssh_variant = VARIANT_SSH; | |
486c8e8c JH |
1089 | } |
1090 | ||
94b8ae5a BW |
1091 | static enum ssh_variant determine_ssh_variant(const char *ssh_command, |
1092 | int is_cmdline) | |
486c8e8c | 1093 | { |
0da0e49b | 1094 | enum ssh_variant ssh_variant = VARIANT_AUTO; |
486c8e8c | 1095 | const char *variant; |
e2824e47 JS |
1096 | char *p = NULL; |
1097 | ||
0da0e49b JN |
1098 | override_ssh_variant(&ssh_variant); |
1099 | ||
1100 | if (ssh_variant != VARIANT_AUTO) | |
94b8ae5a | 1101 | return ssh_variant; |
486c8e8c JH |
1102 | |
1103 | if (!is_cmdline) { | |
e2824e47 JS |
1104 | p = xstrdup(ssh_command); |
1105 | variant = basename(p); | |
1106 | } else { | |
1107 | const char **ssh_argv; | |
1108 | ||
1109 | p = xstrdup(ssh_command); | |
22e5ae5c | 1110 | if (split_cmdline(p, &ssh_argv) > 0) { |
e2824e47 JS |
1111 | variant = basename((char *)ssh_argv[0]); |
1112 | /* | |
1113 | * At this point, variant points into the buffer | |
1114 | * referenced by p, hence we do not need ssh_argv | |
1115 | * any longer. | |
1116 | */ | |
1117 | free(ssh_argv); | |
5d2993b6 JK |
1118 | } else { |
1119 | free(p); | |
94b8ae5a | 1120 | return ssh_variant; |
5d2993b6 | 1121 | } |
e2824e47 JS |
1122 | } |
1123 | ||
94b8ae5a BW |
1124 | if (!strcasecmp(variant, "ssh") || |
1125 | !strcasecmp(variant, "ssh.exe")) | |
1126 | ssh_variant = VARIANT_SSH; | |
1127 | else if (!strcasecmp(variant, "plink") || | |
1128 | !strcasecmp(variant, "plink.exe")) | |
1129 | ssh_variant = VARIANT_PLINK; | |
e2824e47 | 1130 | else if (!strcasecmp(variant, "tortoiseplink") || |
94b8ae5a BW |
1131 | !strcasecmp(variant, "tortoiseplink.exe")) |
1132 | ssh_variant = VARIANT_TORTOISEPLINK; | |
1133 | ||
e2824e47 | 1134 | free(p); |
94b8ae5a | 1135 | return ssh_variant; |
e2824e47 JS |
1136 | } |
1137 | ||
2ac67cb6 JN |
1138 | /* |
1139 | * Open a connection using Git's native protocol. | |
1140 | * | |
1141 | * The caller is responsible for freeing hostandport, but this function may | |
1142 | * modify it (for example, to truncate it to remove the port part). | |
1143 | */ | |
1144 | static struct child_process *git_connect_git(int fd[2], char *hostandport, | |
1145 | const char *path, const char *prog, | |
40fc51e3 | 1146 | enum protocol_version version, |
2ac67cb6 JN |
1147 | int flags) |
1148 | { | |
1149 | struct child_process *conn; | |
1150 | struct strbuf request = STRBUF_INIT; | |
1151 | /* | |
1152 | * Set up virtual host information based on where we will | |
1153 | * connect, unless the user has overridden us in | |
1154 | * the environment. | |
1155 | */ | |
1156 | char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST"); | |
1157 | if (target_host) | |
1158 | target_host = xstrdup(target_host); | |
1159 | else | |
1160 | target_host = xstrdup(hostandport); | |
1161 | ||
1162 | transport_check_allowed("git"); | |
1163 | ||
233cd282 JN |
1164 | /* |
1165 | * These underlying connection commands die() if they | |
2ac67cb6 JN |
1166 | * cannot connect. |
1167 | */ | |
1168 | if (git_use_proxy(hostandport)) | |
1169 | conn = git_proxy_connect(fd, hostandport); | |
1170 | else | |
1171 | conn = git_tcp_connect(fd, hostandport, flags); | |
1172 | /* | |
1173 | * Separate original protocol components prog and path | |
1174 | * from extended host header with a NUL byte. | |
1175 | * | |
1176 | * Note: Do not add any other headers here! Doing so | |
1177 | * will cause older git-daemon servers to crash. | |
1178 | */ | |
1179 | strbuf_addf(&request, | |
1180 | "%s %s%chost=%s%c", | |
1181 | prog, path, 0, | |
1182 | target_host, 0); | |
1183 | ||
1184 | /* If using a new version put that stuff here after a second null byte */ | |
40fc51e3 | 1185 | if (version > 0) { |
2ac67cb6 JN |
1186 | strbuf_addch(&request, '\0'); |
1187 | strbuf_addf(&request, "version=%d%c", | |
40fc51e3 | 1188 | version, '\0'); |
2ac67cb6 JN |
1189 | } |
1190 | ||
1191 | packet_write(fd[1], request.buf, request.len); | |
1192 | ||
1193 | free(target_host); | |
1194 | strbuf_release(&request); | |
1195 | return conn; | |
1196 | } | |
1197 | ||
957e2ad2 JN |
1198 | /* |
1199 | * Append the appropriate environment variables to `env` and options to | |
1200 | * `args` for running ssh in Git's SSH-tunneled transport. | |
1201 | */ | |
ef8d7ac4 | 1202 | static void push_ssh_options(struct strvec *args, struct strvec *env, |
957e2ad2 | 1203 | enum ssh_variant variant, const char *port, |
40fc51e3 | 1204 | enum protocol_version version, int flags) |
957e2ad2 JN |
1205 | { |
1206 | if (variant == VARIANT_SSH && | |
40fc51e3 | 1207 | version > 0) { |
ef8d7ac4 JK |
1208 | strvec_push(args, "-o"); |
1209 | strvec_push(args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT); | |
1210 | strvec_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=version=%d", | |
f6d8942b | 1211 | version); |
957e2ad2 JN |
1212 | } |
1213 | ||
a3f5b66f JN |
1214 | if (flags & CONNECT_IPV4) { |
1215 | switch (variant) { | |
1216 | case VARIANT_AUTO: | |
1217 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1218 | case VARIANT_SIMPLE: | |
aad6fddb | 1219 | die(_("ssh variant 'simple' does not support -4")); |
a3f5b66f JN |
1220 | case VARIANT_SSH: |
1221 | case VARIANT_PLINK: | |
1222 | case VARIANT_PUTTY: | |
1223 | case VARIANT_TORTOISEPLINK: | |
ef8d7ac4 | 1224 | strvec_push(args, "-4"); |
a3f5b66f JN |
1225 | } |
1226 | } else if (flags & CONNECT_IPV6) { | |
1227 | switch (variant) { | |
1228 | case VARIANT_AUTO: | |
1229 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1230 | case VARIANT_SIMPLE: | |
aad6fddb | 1231 | die(_("ssh variant 'simple' does not support -6")); |
a3f5b66f JN |
1232 | case VARIANT_SSH: |
1233 | case VARIANT_PLINK: | |
1234 | case VARIANT_PUTTY: | |
1235 | case VARIANT_TORTOISEPLINK: | |
ef8d7ac4 | 1236 | strvec_push(args, "-6"); |
a3f5b66f | 1237 | } |
957e2ad2 JN |
1238 | } |
1239 | ||
1240 | if (variant == VARIANT_TORTOISEPLINK) | |
ef8d7ac4 | 1241 | strvec_push(args, "-batch"); |
957e2ad2 | 1242 | |
3fa5e0d0 JN |
1243 | if (port) { |
1244 | switch (variant) { | |
1245 | case VARIANT_AUTO: | |
1246 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1247 | case VARIANT_SIMPLE: | |
aad6fddb | 1248 | die(_("ssh variant 'simple' does not support setting port")); |
3fa5e0d0 | 1249 | case VARIANT_SSH: |
ef8d7ac4 | 1250 | strvec_push(args, "-p"); |
3fa5e0d0 JN |
1251 | break; |
1252 | case VARIANT_PLINK: | |
1253 | case VARIANT_PUTTY: | |
1254 | case VARIANT_TORTOISEPLINK: | |
ef8d7ac4 | 1255 | strvec_push(args, "-P"); |
3fa5e0d0 | 1256 | } |
957e2ad2 | 1257 | |
ef8d7ac4 | 1258 | strvec_push(args, port); |
957e2ad2 JN |
1259 | } |
1260 | } | |
1261 | ||
fce54ce4 JN |
1262 | /* Prepare a child_process for use by Git's SSH-tunneled transport. */ |
1263 | static void fill_ssh_args(struct child_process *conn, const char *ssh_host, | |
40fc51e3 BW |
1264 | const char *port, enum protocol_version version, |
1265 | int flags) | |
fce54ce4 JN |
1266 | { |
1267 | const char *ssh; | |
1268 | enum ssh_variant variant; | |
1269 | ||
1270 | if (looks_like_command_line_option(ssh_host)) | |
aad6fddb | 1271 | die(_("strange hostname '%s' blocked"), ssh_host); |
fce54ce4 JN |
1272 | |
1273 | ssh = get_ssh_command(); | |
1274 | if (ssh) { | |
1275 | variant = determine_ssh_variant(ssh, 1); | |
1276 | } else { | |
1277 | /* | |
1278 | * GIT_SSH is the no-shell version of | |
1279 | * GIT_SSH_COMMAND (and must remain so for | |
1280 | * historical compatibility). | |
1281 | */ | |
1282 | conn->use_shell = 0; | |
1283 | ||
1284 | ssh = getenv("GIT_SSH"); | |
1285 | if (!ssh) | |
1286 | ssh = "ssh"; | |
1287 | variant = determine_ssh_variant(ssh, 0); | |
1288 | } | |
1289 | ||
0da0e49b JN |
1290 | if (variant == VARIANT_AUTO) { |
1291 | struct child_process detect = CHILD_PROCESS_INIT; | |
1292 | ||
1293 | detect.use_shell = conn->use_shell; | |
1294 | detect.no_stdin = detect.no_stdout = detect.no_stderr = 1; | |
1295 | ||
ef8d7ac4 JK |
1296 | strvec_push(&detect.args, ssh); |
1297 | strvec_push(&detect.args, "-G"); | |
0da0e49b | 1298 | push_ssh_options(&detect.args, &detect.env_array, |
40fc51e3 | 1299 | VARIANT_SSH, port, version, flags); |
ef8d7ac4 | 1300 | strvec_push(&detect.args, ssh_host); |
0da0e49b JN |
1301 | |
1302 | variant = run_command(&detect) ? VARIANT_SIMPLE : VARIANT_SSH; | |
1303 | } | |
1304 | ||
ef8d7ac4 | 1305 | strvec_push(&conn->args, ssh); |
40fc51e3 | 1306 | push_ssh_options(&conn->args, &conn->env_array, variant, port, version, flags); |
ef8d7ac4 | 1307 | strvec_push(&conn->args, ssh_host); |
fce54ce4 JN |
1308 | } |
1309 | ||
cabc3c12 | 1310 | /* |
8e349780 JN |
1311 | * This returns the dummy child_process `no_fork` if the transport protocol |
1312 | * does not need fork(2), or a struct child_process object if it does. Once | |
1313 | * done, finish the connection with finish_connect() with the value returned | |
1314 | * from this function (it is safe to call finish_connect() with NULL to | |
1315 | * support the former case). | |
cabc3c12 JS |
1316 | * |
1317 | * If it returns, the connect is successful; it just dies on errors (this | |
1318 | * will hopefully be changed in a libification effort, to return NULL when | |
1319 | * the connection failed). | |
1320 | */ | |
1321 | struct child_process *git_connect(int fd[2], const char *url, | |
1322 | const char *prog, int flags) | |
1323 | { | |
a2036d7e | 1324 | char *hostandport, *path; |
8e349780 | 1325 | struct child_process *conn; |
cabc3c12 | 1326 | enum protocol protocol; |
40fc51e3 | 1327 | enum protocol_version version = get_protocol_version_config(); |
cabc3c12 | 1328 | |
1aa8dded BW |
1329 | /* |
1330 | * NEEDSWORK: If we are trying to use protocol v2 and we are planning | |
1331 | * to perform a push, then fallback to v0 since the client doesn't know | |
1332 | * how to push yet using v2. | |
1333 | */ | |
1334 | if (version == protocol_v2 && !strcmp("git-receive-pack", prog)) | |
1335 | version = protocol_v0; | |
1336 | ||
cabc3c12 JS |
1337 | /* Without this we cannot rely on waitpid() to tell |
1338 | * what happened to our children. | |
2e776665 | 1339 | */ |
cabc3c12 | 1340 | signal(SIGCHLD, SIG_DFL); |
2e776665 | 1341 | |
a2036d7e | 1342 | protocol = parse_connect_url(url, &hostandport, &path); |
3f55ccab | 1343 | if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) { |
5610b7c0 TB |
1344 | printf("Diag: url=%s\n", url ? url : "NULL"); |
1345 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
a2036d7e | 1346 | printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL"); |
5610b7c0 | 1347 | printf("Diag: path=%s\n", path ? path : "NULL"); |
a2036d7e TB |
1348 | conn = NULL; |
1349 | } else if (protocol == PROTO_GIT) { | |
40fc51e3 | 1350 | conn = git_connect_git(fd, hostandport, path, prog, version, flags); |
abd81a3d | 1351 | conn->trace2_child_class = "transport/git"; |
a2036d7e | 1352 | } else { |
f1399291 | 1353 | struct strbuf cmd = STRBUF_INIT; |
0c2f0d27 | 1354 | const char *const *var; |
f1399291 | 1355 | |
483bbd4e RS |
1356 | conn = xmalloc(sizeof(*conn)); |
1357 | child_process_init(conn); | |
a2036d7e | 1358 | |
aeeb2d49 | 1359 | if (looks_like_command_line_option(path)) |
aad6fddb | 1360 | die(_("strange pathname '%s' blocked"), path); |
aeeb2d49 | 1361 | |
a2036d7e TB |
1362 | strbuf_addstr(&cmd, prog); |
1363 | strbuf_addch(&cmd, ' '); | |
1364 | sq_quote_buf(&cmd, path); | |
1365 | ||
aab40438 | 1366 | /* remove repo-local variables from the environment */ |
0c2f0d27 | 1367 | for (var = local_repo_env; *var; var++) |
ef8d7ac4 | 1368 | strvec_push(&conn->env_array, *var); |
0c2f0d27 | 1369 | |
a48b409f | 1370 | conn->use_shell = 1; |
a2036d7e | 1371 | conn->in = conn->out = -1; |
a2036d7e | 1372 | if (protocol == PROTO_SSH) { |
a2036d7e TB |
1373 | char *ssh_host = hostandport; |
1374 | const char *port = NULL; | |
a5adaced | 1375 | transport_check_allowed("ssh"); |
a2036d7e | 1376 | get_host_and_port(&ssh_host, &port); |
a2036d7e | 1377 | |
86ceb337 TB |
1378 | if (!port) |
1379 | port = get_port(ssh_host); | |
42da4840 | 1380 | |
3f55ccab TB |
1381 | if (flags & CONNECT_DIAG_URL) { |
1382 | printf("Diag: url=%s\n", url ? url : "NULL"); | |
1383 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
1384 | printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL"); | |
1385 | printf("Diag: port=%s\n", port ? port : "NONE"); | |
1386 | printf("Diag: path=%s\n", path ? path : "NULL"); | |
a2036d7e | 1387 | |
3f55ccab TB |
1388 | free(hostandport); |
1389 | free(path); | |
04f20c04 | 1390 | free(conn); |
f1399291 | 1391 | strbuf_release(&cmd); |
3f55ccab | 1392 | return NULL; |
37ee646e | 1393 | } |
abd81a3d | 1394 | conn->trace2_child_class = "transport/ssh"; |
40fc51e3 | 1395 | fill_ssh_args(conn, ssh_host, port, version, flags); |
c049b61d | 1396 | } else { |
a5adaced | 1397 | transport_check_allowed("file"); |
abd81a3d | 1398 | conn->trace2_child_class = "transport/file"; |
40fc51e3 | 1399 | if (version > 0) { |
f6d8942b JK |
1400 | strvec_pushf(&conn->env_array, |
1401 | GIT_PROTOCOL_ENVIRONMENT "=version=%d", | |
1402 | version); | |
0c2f0d27 | 1403 | } |
4852f723 | 1404 | } |
ef8d7ac4 | 1405 | strvec_push(&conn->args, cmd.buf); |
f364cb88 | 1406 | |
a2036d7e | 1407 | if (start_command(conn)) |
aad6fddb | 1408 | die(_("unable to fork")); |
f364cb88 | 1409 | |
a2036d7e TB |
1410 | fd[0] = conn->out; /* read from child's stdout */ |
1411 | fd[1] = conn->in; /* write to child's stdin */ | |
1412 | strbuf_release(&cmd); | |
1413 | } | |
1414 | free(hostandport); | |
cabc3c12 | 1415 | free(path); |
98158e9c | 1416 | return conn; |
f7192598 LT |
1417 | } |
1418 | ||
98158e9c | 1419 | int finish_connect(struct child_process *conn) |
f7192598 | 1420 | { |
f364cb88 | 1421 | int code; |
7ffe853b | 1422 | if (!conn || git_connection_is_socket(conn)) |
f42a5c4e FBH |
1423 | return 0; |
1424 | ||
f364cb88 | 1425 | code = finish_command(conn); |
98158e9c | 1426 | free(conn); |
f364cb88 | 1427 | return code; |
f7192598 | 1428 | } |