]>
Commit | Line | Data |
---|---|---|
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" |
13eb4626 | 12 | #include "sha1-array.h" |
a5adaced | 13 | #include "transport.h" |
0cd83283 | 14 | #include "strbuf.h" |
e52449b6 | 15 | #include "version.h" |
2609043d | 16 | #include "protocol.h" |
f7192598 | 17 | |
e52449b6 BW |
18 | static char *server_capabilities_v1; |
19 | static struct argv_array server_capabilities_v2 = ARGV_ARRAY_INIT; | |
5d54cffc | 20 | static const char *parse_feature_value(const char *, const char *, int *); |
211b5f9e | 21 | |
be0b3f82 | 22 | static int check_ref(const char *name, unsigned int flags) |
2718ff09 LT |
23 | { |
24 | if (!flags) | |
25 | return 1; | |
26 | ||
be0b3f82 | 27 | if (!skip_prefix(name, "refs/", &name)) |
2718ff09 LT |
28 | return 0; |
29 | ||
2718ff09 | 30 | /* REF_NORMAL means that we don't want the magic fake tag refs */ |
8d9c5010 | 31 | if ((flags & REF_NORMAL) && check_refname_format(name, 0)) |
2718ff09 LT |
32 | return 0; |
33 | ||
34 | /* REF_HEADS means that we want regular branch heads */ | |
be0b3f82 | 35 | if ((flags & REF_HEADS) && starts_with(name, "heads/")) |
2718ff09 LT |
36 | return 1; |
37 | ||
38 | /* REF_TAGS means that we want tags */ | |
be0b3f82 | 39 | if ((flags & REF_TAGS) && starts_with(name, "tags/")) |
2718ff09 LT |
40 | return 1; |
41 | ||
42 | /* All type bits clear means that we are ok with anything */ | |
43 | return !(flags & ~REF_NORMAL); | |
44 | } | |
45 | ||
4577370e DB |
46 | int check_ref_type(const struct ref *ref, int flags) |
47 | { | |
be0b3f82 | 48 | return check_ref(ref->name, flags); |
4577370e DB |
49 | } |
50 | ||
55e4f936 | 51 | static void die_initial_contact(int unexpected) |
46284dd1 | 52 | { |
7e3e479b BW |
53 | /* |
54 | * A hang-up after seeing some response from the other end | |
55 | * means that it is unexpected, as we know the other end is | |
56 | * willing to talk to us. A hang-up before seeing any | |
57 | * response does not necessarily mean an ACL problem, though. | |
58 | */ | |
55e4f936 | 59 | if (unexpected) |
f2b93b38 | 60 | die(_("The remote end hung up upon initial contact")); |
46284dd1 | 61 | else |
f2b93b38 VA |
62 | die(_("Could not read from remote repository.\n\n" |
63 | "Please make sure you have the correct access rights\n" | |
64 | "and the repository exists.")); | |
46284dd1 HV |
65 | } |
66 | ||
e52449b6 BW |
67 | /* Checks if the server supports the capability 'c' */ |
68 | int server_supports_v2(const char *c, int die_on_error) | |
69 | { | |
70 | int i; | |
71 | ||
72 | for (i = 0; i < server_capabilities_v2.argc; i++) { | |
73 | const char *out; | |
74 | if (skip_prefix(server_capabilities_v2.argv[i], c, &out) && | |
75 | (!*out || *out == '=')) | |
76 | return 1; | |
77 | } | |
78 | ||
79 | if (die_on_error) | |
80 | die("server doesn't support '%s'", c); | |
81 | ||
82 | return 0; | |
83 | } | |
84 | ||
85 | static void process_capabilities_v2(struct packet_reader *reader) | |
86 | { | |
87 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) | |
88 | argv_array_push(&server_capabilities_v2, reader->line); | |
89 | ||
90 | if (reader->status != PACKET_READ_FLUSH) | |
91 | die("expected flush after capabilities"); | |
92 | } | |
93 | ||
ad6ac124 | 94 | enum protocol_version discover_version(struct packet_reader *reader) |
7e3e479b BW |
95 | { |
96 | enum protocol_version version = protocol_unknown_version; | |
97 | ||
98 | /* | |
99 | * Peek the first line of the server's response to | |
100 | * determine the protocol version the server is speaking. | |
101 | */ | |
102 | switch (packet_reader_peek(reader)) { | |
103 | case PACKET_READ_EOF: | |
104 | die_initial_contact(0); | |
105 | case PACKET_READ_FLUSH: | |
106 | case PACKET_READ_DELIM: | |
107 | version = protocol_v0; | |
108 | break; | |
109 | case PACKET_READ_NORMAL: | |
110 | version = determine_protocol_version_client(reader->line); | |
111 | break; | |
112 | } | |
113 | ||
114 | switch (version) { | |
8f6982b4 | 115 | case protocol_v2: |
e52449b6 | 116 | process_capabilities_v2(reader); |
8f6982b4 | 117 | break; |
7e3e479b BW |
118 | case protocol_v1: |
119 | /* Read the peeked version line */ | |
120 | packet_reader_read(reader); | |
121 | break; | |
122 | case protocol_v0: | |
123 | break; | |
124 | case protocol_unknown_version: | |
125 | BUG("unknown protocol version"); | |
126 | } | |
127 | ||
128 | return version; | |
129 | } | |
130 | ||
a45b5f05 JH |
131 | static void parse_one_symref_info(struct string_list *symref, const char *val, int len) |
132 | { | |
133 | char *sym, *target; | |
134 | struct string_list_item *item; | |
135 | ||
136 | if (!len) | |
137 | return; /* just "symref" */ | |
138 | /* e.g. "symref=HEAD:refs/heads/master" */ | |
5c0b13f8 | 139 | sym = xmemdupz(val, len); |
a45b5f05 JH |
140 | target = strchr(sym, ':'); |
141 | if (!target) | |
142 | /* just "symref=something" */ | |
143 | goto reject; | |
144 | *(target++) = '\0'; | |
145 | if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) || | |
146 | check_refname_format(target, REFNAME_ALLOW_ONELEVEL)) | |
147 | /* "symref=bogus:pair */ | |
148 | goto reject; | |
ef4fe561 | 149 | item = string_list_append_nodup(symref, sym); |
a45b5f05 JH |
150 | item->util = target; |
151 | return; | |
152 | reject: | |
153 | free(sym); | |
154 | return; | |
155 | } | |
156 | ||
157 | static void annotate_refs_with_symref_info(struct ref *ref) | |
158 | { | |
159 | struct string_list symref = STRING_LIST_INIT_DUP; | |
e52449b6 | 160 | const char *feature_list = server_capabilities_v1; |
a45b5f05 JH |
161 | |
162 | while (feature_list) { | |
163 | int len; | |
164 | const char *val; | |
165 | ||
166 | val = parse_feature_value(feature_list, "symref", &len); | |
167 | if (!val) | |
168 | break; | |
169 | parse_one_symref_info(&symref, val, len); | |
170 | feature_list = val + 1; | |
171 | } | |
3383e199 | 172 | string_list_sort(&symref); |
a45b5f05 JH |
173 | |
174 | for (; ref; ref = ref->next) { | |
175 | struct string_list_item *item; | |
176 | item = string_list_lookup(&symref, ref->name); | |
177 | if (!item) | |
178 | continue; | |
179 | ref->symref = xstrdup((char *)item->util); | |
180 | } | |
181 | string_list_clear(&symref, 0); | |
182 | } | |
183 | ||
7e3e479b | 184 | static void process_capabilities(const char *line, int *len) |
2609043d | 185 | { |
7e3e479b | 186 | int nul_location = strlen(line); |
0cd83283 JT |
187 | if (nul_location == *len) |
188 | return; | |
e52449b6 | 189 | server_capabilities_v1 = xstrdup(line + nul_location + 1); |
0cd83283 JT |
190 | *len = nul_location; |
191 | } | |
192 | ||
7e3e479b | 193 | static int process_dummy_ref(const char *line) |
0cd83283 JT |
194 | { |
195 | struct object_id oid; | |
196 | const char *name; | |
197 | ||
7e3e479b | 198 | if (parse_oid_hex(line, &oid, &name)) |
0cd83283 JT |
199 | return 0; |
200 | if (*name != ' ') | |
201 | return 0; | |
202 | name++; | |
203 | ||
204 | return !oidcmp(&null_oid, &oid) && !strcmp(name, "capabilities^{}"); | |
205 | } | |
206 | ||
7e3e479b | 207 | static void check_no_capabilities(const char *line, int len) |
0cd83283 | 208 | { |
7e3e479b | 209 | if (strlen(line) != len) |
0cd83283 | 210 | warning("Ignoring capabilities after first line '%s'", |
7e3e479b | 211 | line + strlen(line)); |
0cd83283 JT |
212 | } |
213 | ||
7e3e479b BW |
214 | static int process_ref(const char *line, int len, struct ref ***list, |
215 | unsigned int flags, struct oid_array *extra_have) | |
0cd83283 JT |
216 | { |
217 | struct object_id old_oid; | |
218 | const char *name; | |
219 | ||
7e3e479b | 220 | if (parse_oid_hex(line, &old_oid, &name)) |
0cd83283 JT |
221 | return 0; |
222 | if (*name != ' ') | |
223 | return 0; | |
224 | name++; | |
225 | ||
226 | if (extra_have && !strcmp(name, ".have")) { | |
227 | oid_array_append(extra_have, &old_oid); | |
228 | } else if (!strcmp(name, "capabilities^{}")) { | |
229 | die("protocol error: unexpected capabilities^{}"); | |
230 | } else if (check_ref(name, flags)) { | |
231 | struct ref *ref = alloc_ref(name); | |
232 | oidcpy(&ref->old_oid, &old_oid); | |
233 | **list = ref; | |
234 | *list = &ref->next; | |
235 | } | |
7e3e479b | 236 | check_no_capabilities(line, len); |
0cd83283 JT |
237 | return 1; |
238 | } | |
239 | ||
7e3e479b BW |
240 | static int process_shallow(const char *line, int len, |
241 | struct oid_array *shallow_points) | |
0cd83283 JT |
242 | { |
243 | const char *arg; | |
244 | struct object_id old_oid; | |
245 | ||
7e3e479b | 246 | if (!skip_prefix(line, "shallow ", &arg)) |
0cd83283 JT |
247 | return 0; |
248 | ||
249 | if (get_oid_hex(arg, &old_oid)) | |
250 | die("protocol error: expected shallow sha-1, got '%s'", arg); | |
251 | if (!shallow_points) | |
252 | die("repository on the other end cannot be shallow"); | |
253 | oid_array_append(shallow_points, &old_oid); | |
7e3e479b | 254 | check_no_capabilities(line, len); |
0cd83283 JT |
255 | return 1; |
256 | } | |
257 | ||
7e3e479b BW |
258 | enum get_remote_heads_state { |
259 | EXPECTING_FIRST_REF = 0, | |
260 | EXPECTING_REF, | |
261 | EXPECTING_SHALLOW, | |
262 | EXPECTING_DONE, | |
263 | }; | |
264 | ||
d1c133f5 LT |
265 | /* |
266 | * Read all the refs from the other end | |
267 | */ | |
ad6ac124 | 268 | struct ref **get_remote_heads(struct packet_reader *reader, |
85edf4f5 | 269 | struct ref **list, unsigned int flags, |
910650d2 | 270 | struct oid_array *extra_have, |
271 | struct oid_array *shallow_points) | |
d1c133f5 | 272 | { |
a45b5f05 | 273 | struct ref **orig_list = list; |
7e3e479b BW |
274 | int len = 0; |
275 | enum get_remote_heads_state state = EXPECTING_FIRST_REF; | |
7e3e479b | 276 | const char *arg; |
55e4f936 | 277 | |
d1c133f5 | 278 | *list = NULL; |
1a7141ff | 279 | |
7e3e479b | 280 | while (state != EXPECTING_DONE) { |
ad6ac124 | 281 | switch (packet_reader_read(reader)) { |
7e3e479b BW |
282 | case PACKET_READ_EOF: |
283 | die_initial_contact(1); | |
284 | case PACKET_READ_NORMAL: | |
ad6ac124 BW |
285 | len = reader->pktlen; |
286 | if (len > 4 && skip_prefix(reader->line, "ERR ", &arg)) | |
7e3e479b BW |
287 | die("remote error: %s", arg); |
288 | break; | |
289 | case PACKET_READ_FLUSH: | |
290 | state = EXPECTING_DONE; | |
291 | break; | |
292 | case PACKET_READ_DELIM: | |
293 | die("invalid packet"); | |
294 | } | |
295 | ||
0cd83283 JT |
296 | switch (state) { |
297 | case EXPECTING_FIRST_REF: | |
ad6ac124 BW |
298 | process_capabilities(reader->line, &len); |
299 | if (process_dummy_ref(reader->line)) { | |
0cd83283 JT |
300 | state = EXPECTING_SHALLOW; |
301 | break; | |
302 | } | |
303 | state = EXPECTING_REF; | |
304 | /* fallthrough */ | |
305 | case EXPECTING_REF: | |
ad6ac124 | 306 | if (process_ref(reader->line, len, &list, flags, extra_have)) |
0cd83283 JT |
307 | break; |
308 | state = EXPECTING_SHALLOW; | |
309 | /* fallthrough */ | |
310 | case EXPECTING_SHALLOW: | |
ad6ac124 | 311 | if (process_shallow(reader->line, len, shallow_points)) |
0cd83283 | 312 | break; |
ad6ac124 | 313 | die("protocol error: unexpected '%s'", reader->line); |
7e3e479b BW |
314 | case EXPECTING_DONE: |
315 | break; | |
211b5f9e | 316 | } |
d1c133f5 | 317 | } |
a45b5f05 JH |
318 | |
319 | annotate_refs_with_symref_info(*orig_list); | |
320 | ||
d1c133f5 LT |
321 | return list; |
322 | } | |
323 | ||
e52449b6 BW |
324 | /* Returns 1 when a valid ref has been added to `list`, 0 otherwise */ |
325 | static int process_ref_v2(const char *line, struct ref ***list) | |
326 | { | |
327 | int ret = 1; | |
328 | int i = 0; | |
329 | struct object_id old_oid; | |
330 | struct ref *ref; | |
331 | struct string_list line_sections = STRING_LIST_INIT_DUP; | |
332 | const char *end; | |
333 | ||
334 | /* | |
335 | * Ref lines have a number of fields which are space deliminated. The | |
336 | * first field is the OID of the ref. The second field is the ref | |
337 | * name. Subsequent fields (symref-target and peeled) are optional and | |
338 | * don't have a particular order. | |
339 | */ | |
340 | if (string_list_split(&line_sections, line, ' ', -1) < 2) { | |
341 | ret = 0; | |
342 | goto out; | |
343 | } | |
344 | ||
345 | if (parse_oid_hex(line_sections.items[i++].string, &old_oid, &end) || | |
346 | *end) { | |
347 | ret = 0; | |
348 | goto out; | |
349 | } | |
350 | ||
351 | ref = alloc_ref(line_sections.items[i++].string); | |
352 | ||
353 | oidcpy(&ref->old_oid, &old_oid); | |
354 | **list = ref; | |
355 | *list = &ref->next; | |
356 | ||
357 | for (; i < line_sections.nr; i++) { | |
358 | const char *arg = line_sections.items[i].string; | |
359 | if (skip_prefix(arg, "symref-target:", &arg)) | |
360 | ref->symref = xstrdup(arg); | |
361 | ||
362 | if (skip_prefix(arg, "peeled:", &arg)) { | |
363 | struct object_id peeled_oid; | |
364 | char *peeled_name; | |
365 | struct ref *peeled; | |
366 | if (parse_oid_hex(arg, &peeled_oid, &end) || *end) { | |
367 | ret = 0; | |
368 | goto out; | |
369 | } | |
370 | ||
371 | peeled_name = xstrfmt("%s^{}", ref->name); | |
372 | peeled = alloc_ref(peeled_name); | |
373 | ||
374 | oidcpy(&peeled->old_oid, &peeled_oid); | |
375 | **list = peeled; | |
376 | *list = &peeled->next; | |
377 | ||
378 | free(peeled_name); | |
379 | } | |
380 | } | |
381 | ||
382 | out: | |
383 | string_list_clear(&line_sections, 0); | |
384 | return ret; | |
385 | } | |
386 | ||
387 | struct ref **get_remote_refs(int fd_out, struct packet_reader *reader, | |
388 | struct ref **list, int for_push, | |
389 | const struct argv_array *ref_prefixes) | |
390 | { | |
391 | int i; | |
392 | *list = NULL; | |
393 | ||
394 | if (server_supports_v2("ls-refs", 1)) | |
395 | packet_write_fmt(fd_out, "command=ls-refs\n"); | |
396 | ||
397 | if (server_supports_v2("agent", 0)) | |
398 | packet_write_fmt(fd_out, "agent=%s", git_user_agent_sanitized()); | |
399 | ||
400 | packet_delim(fd_out); | |
401 | /* When pushing we don't want to request the peeled tags */ | |
402 | if (!for_push) | |
403 | packet_write_fmt(fd_out, "peel\n"); | |
404 | packet_write_fmt(fd_out, "symrefs\n"); | |
405 | for (i = 0; ref_prefixes && i < ref_prefixes->argc; i++) { | |
406 | packet_write_fmt(fd_out, "ref-prefix %s\n", | |
407 | ref_prefixes->argv[i]); | |
408 | } | |
409 | packet_flush(fd_out); | |
410 | ||
411 | /* Process response from server */ | |
412 | while (packet_reader_read(reader) == PACKET_READ_NORMAL) { | |
413 | if (!process_ref_v2(reader->line, &list)) | |
414 | die("invalid ls-refs response: %s", reader->line); | |
415 | } | |
416 | ||
417 | if (reader->status != PACKET_READ_FLUSH) | |
418 | die("expected flush after ref listing"); | |
419 | ||
420 | return list; | |
421 | } | |
422 | ||
5d54cffc | 423 | static const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp) |
f47182c8 JH |
424 | { |
425 | int len; | |
426 | ||
427 | if (!feature_list) | |
428 | return NULL; | |
429 | ||
430 | len = strlen(feature); | |
431 | while (*feature_list) { | |
432 | const char *found = strstr(feature_list, feature); | |
433 | if (!found) | |
434 | return NULL; | |
94427108 JK |
435 | if (feature_list == found || isspace(found[-1])) { |
436 | const char *value = found + len; | |
437 | /* feature with no value (e.g., "thin-pack") */ | |
438 | if (!*value || isspace(*value)) { | |
439 | if (lenp) | |
440 | *lenp = 0; | |
441 | return value; | |
442 | } | |
443 | /* feature with a value (e.g., "agent=git/1.2.3") */ | |
444 | else if (*value == '=') { | |
445 | value++; | |
446 | if (lenp) | |
447 | *lenp = strcspn(value, " \t\n"); | |
448 | return value; | |
449 | } | |
450 | /* | |
451 | * otherwise we matched a substring of another feature; | |
452 | * keep looking | |
453 | */ | |
454 | } | |
f47182c8 JH |
455 | feature_list = found + 1; |
456 | } | |
457 | return NULL; | |
211b5f9e JS |
458 | } |
459 | ||
94427108 JK |
460 | int parse_feature_request(const char *feature_list, const char *feature) |
461 | { | |
462 | return !!parse_feature_value(feature_list, feature, NULL); | |
463 | } | |
464 | ||
465 | const char *server_feature_value(const char *feature, int *len) | |
466 | { | |
e52449b6 | 467 | return parse_feature_value(server_capabilities_v1, feature, len); |
94427108 JK |
468 | } |
469 | ||
470 | int server_supports(const char *feature) | |
471 | { | |
472 | return !!server_feature_value(feature, NULL); | |
473 | } | |
474 | ||
2386d658 LT |
475 | enum protocol { |
476 | PROTO_LOCAL = 1, | |
c59ab2e5 | 477 | PROTO_FILE, |
2386d658 | 478 | PROTO_SSH, |
4b05548f | 479 | PROTO_GIT |
2386d658 LT |
480 | }; |
481 | ||
c59ab2e5 TB |
482 | int url_is_local_not_ssh(const char *url) |
483 | { | |
484 | const char *colon = strchr(url, ':'); | |
485 | const char *slash = strchr(url, '/'); | |
486 | return !colon || (slash && slash < colon) || | |
487 | has_dos_drive_prefix(url); | |
488 | } | |
489 | ||
5610b7c0 TB |
490 | static const char *prot_name(enum protocol protocol) |
491 | { | |
492 | switch (protocol) { | |
493 | case PROTO_LOCAL: | |
c59ab2e5 | 494 | case PROTO_FILE: |
5610b7c0 TB |
495 | return "file"; |
496 | case PROTO_SSH: | |
497 | return "ssh"; | |
498 | case PROTO_GIT: | |
499 | return "git"; | |
500 | default: | |
83e6bda3 | 501 | return "unknown protocol"; |
5610b7c0 TB |
502 | } |
503 | } | |
504 | ||
2386d658 LT |
505 | static enum protocol get_protocol(const char *name) |
506 | { | |
507 | if (!strcmp(name, "ssh")) | |
508 | return PROTO_SSH; | |
509 | if (!strcmp(name, "git")) | |
510 | return PROTO_GIT; | |
07c7782c | 511 | if (!strcmp(name, "git+ssh")) /* deprecated - do not use */ |
c05186cc | 512 | return PROTO_SSH; |
07c7782c | 513 | if (!strcmp(name, "ssh+git")) /* deprecated - do not use */ |
c05186cc | 514 | return PROTO_SSH; |
72a4f4b6 | 515 | if (!strcmp(name, "file")) |
c59ab2e5 | 516 | return PROTO_FILE; |
2386d658 LT |
517 | die("I don't handle protocol '%s'", name); |
518 | } | |
519 | ||
86ceb337 TB |
520 | static char *host_end(char **hoststart, int removebrackets) |
521 | { | |
522 | char *host = *hoststart; | |
523 | char *end; | |
524 | char *start = strstr(host, "@["); | |
525 | if (start) | |
526 | start++; /* Jump over '@' */ | |
527 | else | |
528 | start = host; | |
529 | if (start[0] == '[') { | |
530 | end = strchr(start + 1, ']'); | |
531 | if (end) { | |
532 | if (removebrackets) { | |
533 | *end = 0; | |
534 | memmove(start, start + 1, end - start); | |
535 | end++; | |
536 | } | |
537 | } else | |
538 | end = host; | |
539 | } else | |
540 | end = host; | |
541 | return end; | |
542 | } | |
543 | ||
5ba88448 YH |
544 | #define STR_(s) # s |
545 | #define STR(s) STR_(s) | |
2386d658 | 546 | |
72a534da ML |
547 | static void get_host_and_port(char **host, const char **port) |
548 | { | |
549 | char *colon, *end; | |
86ceb337 | 550 | end = host_end(host, 1); |
72a534da | 551 | colon = strchr(end, ':'); |
72a534da | 552 | if (colon) { |
86ceb337 TB |
553 | long portnr = strtol(colon + 1, &end, 10); |
554 | if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) { | |
555 | *colon = 0; | |
556 | *port = colon + 1; | |
6b6c5f7a TB |
557 | } else if (!colon[1]) { |
558 | *colon = 0; | |
86ceb337 | 559 | } |
72a534da ML |
560 | } |
561 | } | |
562 | ||
e47a8583 EW |
563 | static void enable_keepalive(int sockfd) |
564 | { | |
565 | int ka = 1; | |
566 | ||
567 | if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0) | |
568 | fprintf(stderr, "unable to set SO_KEEPALIVE on socket: %s\n", | |
569 | strerror(errno)); | |
570 | } | |
571 | ||
49744d63 | 572 | #ifndef NO_IPV6 |
4c505f71 | 573 | |
ba505322 AR |
574 | static const char *ai_name(const struct addrinfo *ai) |
575 | { | |
785a9857 BK |
576 | static char addr[NI_MAXHOST]; |
577 | if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0, | |
578 | NI_NUMERICHOST) != 0) | |
5096d490 | 579 | xsnprintf(addr, sizeof(addr), "(unknown)"); |
785a9857 | 580 | |
ba505322 AR |
581 | return addr; |
582 | } | |
583 | ||
5ad312be JL |
584 | /* |
585 | * Returns a connected socket() fd, or else die()s. | |
586 | */ | |
7841ce79 | 587 | static int git_tcp_connect_sock(char *host, int flags) |
2386d658 | 588 | { |
63a995b6 DZ |
589 | struct strbuf error_message = STRBUF_INIT; |
590 | int sockfd = -1; | |
554fe20d | 591 | const char *port = STR(DEFAULT_GIT_PORT); |
5ba88448 YH |
592 | struct addrinfo hints, *ai0, *ai; |
593 | int gai; | |
ba505322 | 594 | int cnt = 0; |
5ba88448 | 595 | |
72a534da ML |
596 | get_host_and_port(&host, &port); |
597 | if (!*port) | |
598 | port = "<none>"; | |
5ba88448 YH |
599 | |
600 | memset(&hints, 0, sizeof(hints)); | |
c915f11e EW |
601 | if (flags & CONNECT_IPV4) |
602 | hints.ai_family = AF_INET; | |
603 | else if (flags & CONNECT_IPV6) | |
604 | hints.ai_family = AF_INET6; | |
5ba88448 YH |
605 | hints.ai_socktype = SOCK_STREAM; |
606 | hints.ai_protocol = IPPROTO_TCP; | |
607 | ||
7841ce79 MT |
608 | if (flags & CONNECT_VERBOSE) |
609 | fprintf(stderr, "Looking up %s ... ", host); | |
610 | ||
5ba88448 YH |
611 | gai = getaddrinfo(host, port, &hints, &ai); |
612 | if (gai) | |
608d48b2 | 613 | die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai)); |
5ba88448 | 614 | |
7841ce79 MT |
615 | if (flags & CONNECT_VERBOSE) |
616 | fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port); | |
617 | ||
e08afecd | 618 | for (ai0 = ai; ai; ai = ai->ai_next, cnt++) { |
5ad312be JL |
619 | sockfd = socket(ai->ai_family, |
620 | ai->ai_socktype, ai->ai_protocol); | |
63a995b6 DZ |
621 | if ((sockfd < 0) || |
622 | (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) { | |
623 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
624 | host, cnt, ai_name(ai), strerror(errno)); | |
625 | if (0 <= sockfd) | |
626 | close(sockfd); | |
5ba88448 YH |
627 | sockfd = -1; |
628 | continue; | |
2386d658 | 629 | } |
ba505322 AR |
630 | if (flags & CONNECT_VERBOSE) |
631 | fprintf(stderr, "%s ", ai_name(ai)); | |
5ba88448 | 632 | break; |
2386d658 LT |
633 | } |
634 | ||
5ba88448 | 635 | freeaddrinfo(ai0); |
2386d658 | 636 | |
2386d658 | 637 | if (sockfd < 0) |
63a995b6 | 638 | die("unable to connect to %s:\n%s", host, error_message.buf); |
5ba88448 | 639 | |
e47a8583 EW |
640 | enable_keepalive(sockfd); |
641 | ||
7841ce79 MT |
642 | if (flags & CONNECT_VERBOSE) |
643 | fprintf(stderr, "done.\n"); | |
644 | ||
63a995b6 DZ |
645 | strbuf_release(&error_message); |
646 | ||
5ad312be | 647 | return sockfd; |
2386d658 LT |
648 | } |
649 | ||
49744d63 | 650 | #else /* NO_IPV6 */ |
4c505f71 | 651 | |
5ad312be JL |
652 | /* |
653 | * Returns a connected socket() fd, or else die()s. | |
654 | */ | |
7841ce79 | 655 | static int git_tcp_connect_sock(char *host, int flags) |
4c505f71 | 656 | { |
7203a2d1 EFL |
657 | struct strbuf error_message = STRBUF_INIT; |
658 | int sockfd = -1; | |
72a534da ML |
659 | const char *port = STR(DEFAULT_GIT_PORT); |
660 | char *ep; | |
4c505f71 PA |
661 | struct hostent *he; |
662 | struct sockaddr_in sa; | |
663 | char **ap; | |
664 | unsigned int nport; | |
ba505322 | 665 | int cnt; |
4c505f71 | 666 | |
72a534da | 667 | get_host_and_port(&host, &port); |
4c505f71 | 668 | |
7841ce79 MT |
669 | if (flags & CONNECT_VERBOSE) |
670 | fprintf(stderr, "Looking up %s ... ", host); | |
671 | ||
4c505f71 PA |
672 | he = gethostbyname(host); |
673 | if (!he) | |
674 | die("Unable to look up %s (%s)", host, hstrerror(h_errno)); | |
675 | nport = strtoul(port, &ep, 10); | |
676 | if ( ep == port || *ep ) { | |
677 | /* Not numeric */ | |
678 | struct servent *se = getservbyname(port,"tcp"); | |
679 | if ( !se ) | |
d7530708 | 680 | die("Unknown port %s", port); |
4c505f71 PA |
681 | nport = se->s_port; |
682 | } | |
683 | ||
7841ce79 MT |
684 | if (flags & CONNECT_VERBOSE) |
685 | fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port); | |
686 | ||
ba505322 | 687 | for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) { |
4c505f71 PA |
688 | memset(&sa, 0, sizeof sa); |
689 | sa.sin_family = he->h_addrtype; | |
6573faff | 690 | sa.sin_port = htons(nport); |
c6164218 | 691 | memcpy(&sa.sin_addr, *ap, he->h_length); |
4c505f71 | 692 | |
7203a2d1 EFL |
693 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); |
694 | if ((sockfd < 0) || | |
695 | connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
696 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
ba505322 AR |
697 | host, |
698 | cnt, | |
699 | inet_ntoa(*(struct in_addr *)&sa.sin_addr), | |
7203a2d1 EFL |
700 | strerror(errno)); |
701 | if (0 <= sockfd) | |
702 | close(sockfd); | |
4c505f71 PA |
703 | sockfd = -1; |
704 | continue; | |
705 | } | |
ba505322 AR |
706 | if (flags & CONNECT_VERBOSE) |
707 | fprintf(stderr, "%s ", | |
708 | inet_ntoa(*(struct in_addr *)&sa.sin_addr)); | |
4c505f71 PA |
709 | break; |
710 | } | |
711 | ||
712 | if (sockfd < 0) | |
7203a2d1 | 713 | die("unable to connect to %s:\n%s", host, error_message.buf); |
4c505f71 | 714 | |
e47a8583 EW |
715 | enable_keepalive(sockfd); |
716 | ||
7841ce79 MT |
717 | if (flags & CONNECT_VERBOSE) |
718 | fprintf(stderr, "done.\n"); | |
719 | ||
5ad312be JL |
720 | return sockfd; |
721 | } | |
722 | ||
723 | #endif /* NO_IPV6 */ | |
724 | ||
725 | ||
8e349780 JN |
726 | /* |
727 | * Dummy child_process returned by git_connect() if the transport protocol | |
728 | * does not need fork(2). | |
729 | */ | |
730 | static struct child_process no_fork = CHILD_PROCESS_INIT; | |
731 | ||
732 | int git_connection_is_socket(struct child_process *conn) | |
733 | { | |
734 | return conn == &no_fork; | |
735 | } | |
736 | ||
737 | static struct child_process *git_tcp_connect(int fd[2], char *host, int flags) | |
5ad312be | 738 | { |
7841ce79 | 739 | int sockfd = git_tcp_connect_sock(host, flags); |
5ad312be | 740 | |
4c505f71 | 741 | fd[0] = sockfd; |
ec587fde | 742 | fd[1] = dup(sockfd); |
8e349780 JN |
743 | |
744 | return &no_fork; | |
4c505f71 PA |
745 | } |
746 | ||
4c505f71 | 747 | |
96f1e58f | 748 | static char *git_proxy_command; |
f8014776 | 749 | |
ef90d6d4 JS |
750 | static int git_proxy_command_options(const char *var, const char *value, |
751 | void *cb) | |
f8014776 | 752 | { |
e814bc4d | 753 | if (!strcmp(var, "core.gitproxy")) { |
c3df8568 YH |
754 | const char *for_pos; |
755 | int matchlen = -1; | |
756 | int hostlen; | |
15112c95 EFL |
757 | const char *rhost_name = cb; |
758 | int rhost_len = strlen(rhost_name); | |
c3df8568 | 759 | |
e814bc4d | 760 | if (git_proxy_command) |
f8014776 | 761 | return 0; |
c64b9ad0 JH |
762 | if (!value) |
763 | return config_error_nonbool(var); | |
e814bc4d JH |
764 | /* [core] |
765 | * ;# matches www.kernel.org as well | |
766 | * gitproxy = netcatter-1 for kernel.org | |
767 | * gitproxy = netcatter-2 for sample.xz | |
768 | * gitproxy = netcatter-default | |
769 | */ | |
c3df8568 | 770 | for_pos = strstr(value, " for "); |
e814bc4d JH |
771 | if (!for_pos) |
772 | /* matches everybody */ | |
773 | matchlen = strlen(value); | |
774 | else { | |
775 | hostlen = strlen(for_pos + 5); | |
776 | if (rhost_len < hostlen) | |
777 | matchlen = -1; | |
778 | else if (!strncmp(for_pos + 5, | |
779 | rhost_name + rhost_len - hostlen, | |
780 | hostlen) && | |
781 | ((rhost_len == hostlen) || | |
782 | rhost_name[rhost_len - hostlen -1] == '.')) | |
783 | matchlen = for_pos - value; | |
784 | else | |
785 | matchlen = -1; | |
786 | } | |
787 | if (0 <= matchlen) { | |
788 | /* core.gitproxy = none for kernel.org */ | |
a6080a0a | 789 | if (matchlen == 4 && |
e814bc4d JH |
790 | !memcmp(value, "none", 4)) |
791 | matchlen = 0; | |
182af834 | 792 | git_proxy_command = xmemdupz(value, matchlen); |
f8014776 | 793 | } |
e814bc4d | 794 | return 0; |
f8014776 PC |
795 | } |
796 | ||
ef90d6d4 | 797 | return git_default_config(var, value, cb); |
f8014776 PC |
798 | } |
799 | ||
e814bc4d | 800 | static int git_use_proxy(const char *host) |
f8014776 PC |
801 | { |
802 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); | |
15112c95 | 803 | git_config(git_proxy_command_options, (void*)host); |
e814bc4d | 804 | return (git_proxy_command && *git_proxy_command); |
f8014776 PC |
805 | } |
806 | ||
5cbf8246 | 807 | static struct child_process *git_proxy_connect(int fd[2], char *host) |
f8014776 | 808 | { |
554fe20d | 809 | const char *port = STR(DEFAULT_GIT_PORT); |
5cbf8246 | 810 | struct child_process *proxy; |
f8014776 | 811 | |
72a534da | 812 | get_host_and_port(&host, &port); |
f8014776 | 813 | |
3be4cf09 JK |
814 | if (looks_like_command_line_option(host)) |
815 | die("strange hostname '%s' blocked", host); | |
816 | if (looks_like_command_line_option(port)) | |
817 | die("strange port '%s' blocked", port); | |
818 | ||
483bbd4e RS |
819 | proxy = xmalloc(sizeof(*proxy)); |
820 | child_process_init(proxy); | |
1823bea1 JK |
821 | argv_array_push(&proxy->args, git_proxy_command); |
822 | argv_array_push(&proxy->args, host); | |
823 | argv_array_push(&proxy->args, port); | |
5cbf8246 JK |
824 | proxy->in = -1; |
825 | proxy->out = -1; | |
826 | if (start_command(proxy)) | |
1823bea1 | 827 | die("cannot start proxy %s", git_proxy_command); |
5cbf8246 JK |
828 | fd[0] = proxy->out; /* read from proxy stdout */ |
829 | fd[1] = proxy->in; /* write to proxy stdin */ | |
830 | return proxy; | |
f8014776 PC |
831 | } |
832 | ||
86ceb337 | 833 | static char *get_port(char *host) |
2e776665 LT |
834 | { |
835 | char *end; | |
86ceb337 TB |
836 | char *p = strchr(host, ':'); |
837 | ||
2e776665 | 838 | if (p) { |
8f148253 RS |
839 | long port = strtol(p + 1, &end, 10); |
840 | if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) { | |
86ceb337 TB |
841 | *p = '\0'; |
842 | return p+1; | |
2e776665 LT |
843 | } |
844 | } | |
845 | ||
846 | return NULL; | |
847 | } | |
848 | ||
f7192598 | 849 | /* |
cabc3c12 JS |
850 | * Extract protocol and relevant parts from the specified connection URL. |
851 | * The caller must free() the returned strings. | |
f7192598 | 852 | */ |
cabc3c12 | 853 | static enum protocol parse_connect_url(const char *url_orig, char **ret_host, |
83b05875 | 854 | char **ret_path) |
f7192598 | 855 | { |
9d2e9420 | 856 | char *url; |
8e76bf3f | 857 | char *host, *path; |
356bece0 | 858 | char *end; |
c59ab2e5 | 859 | int separator = '/'; |
faea9ccb | 860 | enum protocol protocol = PROTO_LOCAL; |
f0b7367c | 861 | |
9d2e9420 JK |
862 | if (is_url(url_orig)) |
863 | url = url_decode(url_orig); | |
864 | else | |
865 | url = xstrdup(url_orig); | |
866 | ||
faea9ccb | 867 | host = strstr(url, "://"); |
eeefa7c9 | 868 | if (host) { |
faea9ccb AE |
869 | *host = '\0'; |
870 | protocol = get_protocol(url); | |
871 | host += 3; | |
356bece0 | 872 | } else { |
f7192598 | 873 | host = url; |
c59ab2e5 TB |
874 | if (!url_is_local_not_ssh(url)) { |
875 | protocol = PROTO_SSH; | |
876 | separator = ':'; | |
877 | } | |
356bece0 YH |
878 | } |
879 | ||
9aa5053d | 880 | /* |
83b05875 TB |
881 | * Don't do destructive transforms as protocol code does |
882 | * '[]' unwrapping in get_host_and_port() | |
9aa5053d | 883 | */ |
86ceb337 | 884 | end = host_end(&host, 0); |
356bece0 | 885 | |
c59ab2e5 | 886 | if (protocol == PROTO_LOCAL) |
72a4f4b6 | 887 | path = end; |
c59ab2e5 TB |
888 | else if (protocol == PROTO_FILE && has_dos_drive_prefix(end)) |
889 | path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */ | |
890 | else | |
891 | path = strchr(end, separator); | |
2386d658 | 892 | |
faea9ccb AE |
893 | if (!path || !*path) |
894 | die("No path specified. See 'man git-pull' for valid url syntax"); | |
895 | ||
896 | /* | |
897 | * null-terminate hostname and point path to ~ for URL's like this: | |
898 | * ssh://host.xz/~user/repo | |
899 | */ | |
c59ab2e5 TB |
900 | |
901 | end = path; /* Need to \0 terminate host here */ | |
902 | if (separator == ':') | |
903 | path++; /* path starts after ':' */ | |
904 | if (protocol == PROTO_GIT || protocol == PROTO_SSH) { | |
faea9ccb AE |
905 | if (path[1] == '~') |
906 | path++; | |
faea9ccb AE |
907 | } |
908 | ||
c59ab2e5 TB |
909 | path = xstrdup(path); |
910 | *end = '\0'; | |
911 | ||
cabc3c12 | 912 | *ret_host = xstrdup(host); |
c59ab2e5 | 913 | *ret_path = path; |
cabc3c12 JS |
914 | free(url); |
915 | return protocol; | |
916 | } | |
917 | ||
3c8ede3f NTND |
918 | static const char *get_ssh_command(void) |
919 | { | |
920 | const char *ssh; | |
921 | ||
922 | if ((ssh = getenv("GIT_SSH_COMMAND"))) | |
923 | return ssh; | |
924 | ||
925 | if (!git_config_get_string_const("core.sshcommand", &ssh)) | |
926 | return ssh; | |
927 | ||
928 | return NULL; | |
929 | } | |
930 | ||
94b8ae5a | 931 | enum ssh_variant { |
0da0e49b | 932 | VARIANT_AUTO, |
94b8ae5a BW |
933 | VARIANT_SIMPLE, |
934 | VARIANT_SSH, | |
935 | VARIANT_PLINK, | |
936 | VARIANT_PUTTY, | |
937 | VARIANT_TORTOISEPLINK, | |
938 | }; | |
939 | ||
0da0e49b | 940 | static void override_ssh_variant(enum ssh_variant *ssh_variant) |
e2824e47 | 941 | { |
94b8ae5a | 942 | const char *variant = getenv("GIT_SSH_VARIANT"); |
486c8e8c | 943 | |
94b8ae5a | 944 | if (!variant && git_config_get_string_const("ssh.variant", &variant)) |
0da0e49b | 945 | return; |
486c8e8c | 946 | |
0da0e49b JN |
947 | if (!strcmp(variant, "auto")) |
948 | *ssh_variant = VARIANT_AUTO; | |
949 | else if (!strcmp(variant, "plink")) | |
94b8ae5a BW |
950 | *ssh_variant = VARIANT_PLINK; |
951 | else if (!strcmp(variant, "putty")) | |
952 | *ssh_variant = VARIANT_PUTTY; | |
953 | else if (!strcmp(variant, "tortoiseplink")) | |
954 | *ssh_variant = VARIANT_TORTOISEPLINK; | |
955 | else if (!strcmp(variant, "simple")) | |
956 | *ssh_variant = VARIANT_SIMPLE; | |
957 | else | |
958 | *ssh_variant = VARIANT_SSH; | |
486c8e8c JH |
959 | } |
960 | ||
94b8ae5a BW |
961 | static enum ssh_variant determine_ssh_variant(const char *ssh_command, |
962 | int is_cmdline) | |
486c8e8c | 963 | { |
0da0e49b | 964 | enum ssh_variant ssh_variant = VARIANT_AUTO; |
486c8e8c | 965 | const char *variant; |
e2824e47 JS |
966 | char *p = NULL; |
967 | ||
0da0e49b JN |
968 | override_ssh_variant(&ssh_variant); |
969 | ||
970 | if (ssh_variant != VARIANT_AUTO) | |
94b8ae5a | 971 | return ssh_variant; |
486c8e8c JH |
972 | |
973 | if (!is_cmdline) { | |
e2824e47 JS |
974 | p = xstrdup(ssh_command); |
975 | variant = basename(p); | |
976 | } else { | |
977 | const char **ssh_argv; | |
978 | ||
979 | p = xstrdup(ssh_command); | |
22e5ae5c | 980 | if (split_cmdline(p, &ssh_argv) > 0) { |
e2824e47 JS |
981 | variant = basename((char *)ssh_argv[0]); |
982 | /* | |
983 | * At this point, variant points into the buffer | |
984 | * referenced by p, hence we do not need ssh_argv | |
985 | * any longer. | |
986 | */ | |
987 | free(ssh_argv); | |
5d2993b6 JK |
988 | } else { |
989 | free(p); | |
94b8ae5a | 990 | return ssh_variant; |
5d2993b6 | 991 | } |
e2824e47 JS |
992 | } |
993 | ||
94b8ae5a BW |
994 | if (!strcasecmp(variant, "ssh") || |
995 | !strcasecmp(variant, "ssh.exe")) | |
996 | ssh_variant = VARIANT_SSH; | |
997 | else if (!strcasecmp(variant, "plink") || | |
998 | !strcasecmp(variant, "plink.exe")) | |
999 | ssh_variant = VARIANT_PLINK; | |
e2824e47 | 1000 | else if (!strcasecmp(variant, "tortoiseplink") || |
94b8ae5a BW |
1001 | !strcasecmp(variant, "tortoiseplink.exe")) |
1002 | ssh_variant = VARIANT_TORTOISEPLINK; | |
1003 | ||
e2824e47 | 1004 | free(p); |
94b8ae5a | 1005 | return ssh_variant; |
e2824e47 JS |
1006 | } |
1007 | ||
2ac67cb6 JN |
1008 | /* |
1009 | * Open a connection using Git's native protocol. | |
1010 | * | |
1011 | * The caller is responsible for freeing hostandport, but this function may | |
1012 | * modify it (for example, to truncate it to remove the port part). | |
1013 | */ | |
1014 | static struct child_process *git_connect_git(int fd[2], char *hostandport, | |
1015 | const char *path, const char *prog, | |
1016 | int flags) | |
1017 | { | |
1018 | struct child_process *conn; | |
1019 | struct strbuf request = STRBUF_INIT; | |
1020 | /* | |
1021 | * Set up virtual host information based on where we will | |
1022 | * connect, unless the user has overridden us in | |
1023 | * the environment. | |
1024 | */ | |
1025 | char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST"); | |
1026 | if (target_host) | |
1027 | target_host = xstrdup(target_host); | |
1028 | else | |
1029 | target_host = xstrdup(hostandport); | |
1030 | ||
1031 | transport_check_allowed("git"); | |
1032 | ||
233cd282 JN |
1033 | /* |
1034 | * These underlying connection commands die() if they | |
2ac67cb6 JN |
1035 | * cannot connect. |
1036 | */ | |
1037 | if (git_use_proxy(hostandport)) | |
1038 | conn = git_proxy_connect(fd, hostandport); | |
1039 | else | |
1040 | conn = git_tcp_connect(fd, hostandport, flags); | |
1041 | /* | |
1042 | * Separate original protocol components prog and path | |
1043 | * from extended host header with a NUL byte. | |
1044 | * | |
1045 | * Note: Do not add any other headers here! Doing so | |
1046 | * will cause older git-daemon servers to crash. | |
1047 | */ | |
1048 | strbuf_addf(&request, | |
1049 | "%s %s%chost=%s%c", | |
1050 | prog, path, 0, | |
1051 | target_host, 0); | |
1052 | ||
1053 | /* If using a new version put that stuff here after a second null byte */ | |
1054 | if (get_protocol_version_config() > 0) { | |
1055 | strbuf_addch(&request, '\0'); | |
1056 | strbuf_addf(&request, "version=%d%c", | |
1057 | get_protocol_version_config(), '\0'); | |
1058 | } | |
1059 | ||
1060 | packet_write(fd[1], request.buf, request.len); | |
1061 | ||
1062 | free(target_host); | |
1063 | strbuf_release(&request); | |
1064 | return conn; | |
1065 | } | |
1066 | ||
957e2ad2 JN |
1067 | /* |
1068 | * Append the appropriate environment variables to `env` and options to | |
1069 | * `args` for running ssh in Git's SSH-tunneled transport. | |
1070 | */ | |
1071 | static void push_ssh_options(struct argv_array *args, struct argv_array *env, | |
1072 | enum ssh_variant variant, const char *port, | |
1073 | int flags) | |
1074 | { | |
1075 | if (variant == VARIANT_SSH && | |
1076 | get_protocol_version_config() > 0) { | |
1077 | argv_array_push(args, "-o"); | |
1078 | argv_array_push(args, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT); | |
1079 | argv_array_pushf(env, GIT_PROTOCOL_ENVIRONMENT "=version=%d", | |
1080 | get_protocol_version_config()); | |
1081 | } | |
1082 | ||
a3f5b66f JN |
1083 | if (flags & CONNECT_IPV4) { |
1084 | switch (variant) { | |
1085 | case VARIANT_AUTO: | |
1086 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1087 | case VARIANT_SIMPLE: | |
1088 | die("ssh variant 'simple' does not support -4"); | |
1089 | case VARIANT_SSH: | |
1090 | case VARIANT_PLINK: | |
1091 | case VARIANT_PUTTY: | |
1092 | case VARIANT_TORTOISEPLINK: | |
957e2ad2 | 1093 | argv_array_push(args, "-4"); |
a3f5b66f JN |
1094 | } |
1095 | } else if (flags & CONNECT_IPV6) { | |
1096 | switch (variant) { | |
1097 | case VARIANT_AUTO: | |
1098 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1099 | case VARIANT_SIMPLE: | |
1100 | die("ssh variant 'simple' does not support -6"); | |
1101 | case VARIANT_SSH: | |
1102 | case VARIANT_PLINK: | |
1103 | case VARIANT_PUTTY: | |
1104 | case VARIANT_TORTOISEPLINK: | |
957e2ad2 | 1105 | argv_array_push(args, "-6"); |
a3f5b66f | 1106 | } |
957e2ad2 JN |
1107 | } |
1108 | ||
1109 | if (variant == VARIANT_TORTOISEPLINK) | |
1110 | argv_array_push(args, "-batch"); | |
1111 | ||
3fa5e0d0 JN |
1112 | if (port) { |
1113 | switch (variant) { | |
1114 | case VARIANT_AUTO: | |
1115 | BUG("VARIANT_AUTO passed to push_ssh_options"); | |
1116 | case VARIANT_SIMPLE: | |
1117 | die("ssh variant 'simple' does not support setting port"); | |
1118 | case VARIANT_SSH: | |
957e2ad2 | 1119 | argv_array_push(args, "-p"); |
3fa5e0d0 JN |
1120 | break; |
1121 | case VARIANT_PLINK: | |
1122 | case VARIANT_PUTTY: | |
1123 | case VARIANT_TORTOISEPLINK: | |
957e2ad2 | 1124 | argv_array_push(args, "-P"); |
3fa5e0d0 | 1125 | } |
957e2ad2 JN |
1126 | |
1127 | argv_array_push(args, port); | |
1128 | } | |
1129 | } | |
1130 | ||
fce54ce4 JN |
1131 | /* Prepare a child_process for use by Git's SSH-tunneled transport. */ |
1132 | static void fill_ssh_args(struct child_process *conn, const char *ssh_host, | |
1133 | const char *port, int flags) | |
1134 | { | |
1135 | const char *ssh; | |
1136 | enum ssh_variant variant; | |
1137 | ||
1138 | if (looks_like_command_line_option(ssh_host)) | |
1139 | die("strange hostname '%s' blocked", ssh_host); | |
1140 | ||
1141 | ssh = get_ssh_command(); | |
1142 | if (ssh) { | |
1143 | variant = determine_ssh_variant(ssh, 1); | |
1144 | } else { | |
1145 | /* | |
1146 | * GIT_SSH is the no-shell version of | |
1147 | * GIT_SSH_COMMAND (and must remain so for | |
1148 | * historical compatibility). | |
1149 | */ | |
1150 | conn->use_shell = 0; | |
1151 | ||
1152 | ssh = getenv("GIT_SSH"); | |
1153 | if (!ssh) | |
1154 | ssh = "ssh"; | |
1155 | variant = determine_ssh_variant(ssh, 0); | |
1156 | } | |
1157 | ||
0da0e49b JN |
1158 | if (variant == VARIANT_AUTO) { |
1159 | struct child_process detect = CHILD_PROCESS_INIT; | |
1160 | ||
1161 | detect.use_shell = conn->use_shell; | |
1162 | detect.no_stdin = detect.no_stdout = detect.no_stderr = 1; | |
1163 | ||
1164 | argv_array_push(&detect.args, ssh); | |
1165 | argv_array_push(&detect.args, "-G"); | |
1166 | push_ssh_options(&detect.args, &detect.env_array, | |
1167 | VARIANT_SSH, port, flags); | |
1168 | argv_array_push(&detect.args, ssh_host); | |
1169 | ||
1170 | variant = run_command(&detect) ? VARIANT_SIMPLE : VARIANT_SSH; | |
1171 | } | |
1172 | ||
fce54ce4 | 1173 | argv_array_push(&conn->args, ssh); |
957e2ad2 | 1174 | push_ssh_options(&conn->args, &conn->env_array, variant, port, flags); |
fce54ce4 JN |
1175 | argv_array_push(&conn->args, ssh_host); |
1176 | } | |
1177 | ||
cabc3c12 | 1178 | /* |
8e349780 JN |
1179 | * This returns the dummy child_process `no_fork` if the transport protocol |
1180 | * does not need fork(2), or a struct child_process object if it does. Once | |
1181 | * done, finish the connection with finish_connect() with the value returned | |
1182 | * from this function (it is safe to call finish_connect() with NULL to | |
1183 | * support the former case). | |
cabc3c12 JS |
1184 | * |
1185 | * If it returns, the connect is successful; it just dies on errors (this | |
1186 | * will hopefully be changed in a libification effort, to return NULL when | |
1187 | * the connection failed). | |
1188 | */ | |
1189 | struct child_process *git_connect(int fd[2], const char *url, | |
1190 | const char *prog, int flags) | |
1191 | { | |
a2036d7e | 1192 | char *hostandport, *path; |
8e349780 | 1193 | struct child_process *conn; |
cabc3c12 | 1194 | enum protocol protocol; |
cabc3c12 JS |
1195 | |
1196 | /* Without this we cannot rely on waitpid() to tell | |
1197 | * what happened to our children. | |
2e776665 | 1198 | */ |
cabc3c12 | 1199 | signal(SIGCHLD, SIG_DFL); |
2e776665 | 1200 | |
a2036d7e | 1201 | protocol = parse_connect_url(url, &hostandport, &path); |
3f55ccab | 1202 | if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) { |
5610b7c0 TB |
1203 | printf("Diag: url=%s\n", url ? url : "NULL"); |
1204 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
a2036d7e | 1205 | printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL"); |
5610b7c0 | 1206 | printf("Diag: path=%s\n", path ? path : "NULL"); |
a2036d7e TB |
1207 | conn = NULL; |
1208 | } else if (protocol == PROTO_GIT) { | |
2ac67cb6 | 1209 | conn = git_connect_git(fd, hostandport, path, prog, flags); |
a2036d7e | 1210 | } else { |
f1399291 | 1211 | struct strbuf cmd = STRBUF_INIT; |
0c2f0d27 | 1212 | const char *const *var; |
f1399291 | 1213 | |
483bbd4e RS |
1214 | conn = xmalloc(sizeof(*conn)); |
1215 | child_process_init(conn); | |
a2036d7e | 1216 | |
aeeb2d49 JK |
1217 | if (looks_like_command_line_option(path)) |
1218 | die("strange pathname '%s' blocked", path); | |
1219 | ||
a2036d7e TB |
1220 | strbuf_addstr(&cmd, prog); |
1221 | strbuf_addch(&cmd, ' '); | |
1222 | sq_quote_buf(&cmd, path); | |
1223 | ||
aab40438 | 1224 | /* remove repo-local variables from the environment */ |
0c2f0d27 BW |
1225 | for (var = local_repo_env; *var; var++) |
1226 | argv_array_push(&conn->env_array, *var); | |
1227 | ||
a48b409f | 1228 | conn->use_shell = 1; |
a2036d7e | 1229 | conn->in = conn->out = -1; |
a2036d7e | 1230 | if (protocol == PROTO_SSH) { |
a2036d7e TB |
1231 | char *ssh_host = hostandport; |
1232 | const char *port = NULL; | |
a5adaced | 1233 | transport_check_allowed("ssh"); |
a2036d7e | 1234 | get_host_and_port(&ssh_host, &port); |
a2036d7e | 1235 | |
86ceb337 TB |
1236 | if (!port) |
1237 | port = get_port(ssh_host); | |
42da4840 | 1238 | |
3f55ccab TB |
1239 | if (flags & CONNECT_DIAG_URL) { |
1240 | printf("Diag: url=%s\n", url ? url : "NULL"); | |
1241 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
1242 | printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL"); | |
1243 | printf("Diag: port=%s\n", port ? port : "NONE"); | |
1244 | printf("Diag: path=%s\n", path ? path : "NULL"); | |
a2036d7e | 1245 | |
3f55ccab TB |
1246 | free(hostandport); |
1247 | free(path); | |
04f20c04 | 1248 | free(conn); |
f1399291 | 1249 | strbuf_release(&cmd); |
3f55ccab | 1250 | return NULL; |
37ee646e | 1251 | } |
fce54ce4 | 1252 | fill_ssh_args(conn, ssh_host, port, flags); |
c049b61d | 1253 | } else { |
a5adaced | 1254 | transport_check_allowed("file"); |
0c2f0d27 BW |
1255 | if (get_protocol_version_config() > 0) { |
1256 | argv_array_pushf(&conn->env_array, GIT_PROTOCOL_ENVIRONMENT "=version=%d", | |
1257 | get_protocol_version_config()); | |
1258 | } | |
4852f723 | 1259 | } |
1823bea1 | 1260 | argv_array_push(&conn->args, cmd.buf); |
f364cb88 | 1261 | |
a2036d7e TB |
1262 | if (start_command(conn)) |
1263 | die("unable to fork"); | |
f364cb88 | 1264 | |
a2036d7e TB |
1265 | fd[0] = conn->out; /* read from child's stdout */ |
1266 | fd[1] = conn->in; /* write to child's stdin */ | |
1267 | strbuf_release(&cmd); | |
1268 | } | |
1269 | free(hostandport); | |
cabc3c12 | 1270 | free(path); |
98158e9c | 1271 | return conn; |
f7192598 LT |
1272 | } |
1273 | ||
98158e9c | 1274 | int finish_connect(struct child_process *conn) |
f7192598 | 1275 | { |
f364cb88 | 1276 | int code; |
7ffe853b | 1277 | if (!conn || git_connection_is_socket(conn)) |
f42a5c4e FBH |
1278 | return 0; |
1279 | ||
f364cb88 | 1280 | code = finish_command(conn); |
98158e9c | 1281 | free(conn); |
f364cb88 | 1282 | return code; |
f7192598 | 1283 | } |