tests: move test_lazy_prereq JGIT to test-lib.sh
[git/git.git] / connect.c
CommitLineData
731043fd 1#include "git-compat-util.h"
f7192598 2#include "cache.h"
41cb7488 3#include "pkt-line.h"
b10d0ec7 4#include "quote.h"
6abf5c0c 5#include "refs.h"
15a1c012 6#include "run-command.h"
6b62816c 7#include "remote.h"
47a59185 8#include "connect.h"
9d2e9420 9#include "url.h"
a45b5f05 10#include "string-list.h"
13eb4626 11#include "sha1-array.h"
a5adaced 12#include "transport.h"
f7192598 13
96f1e58f 14static char *server_capabilities;
5d54cffc 15static const char *parse_feature_value(const char *, const char *, int *);
211b5f9e 16
be0b3f82 17static int check_ref(const char *name, unsigned int flags)
2718ff09
LT
18{
19 if (!flags)
20 return 1;
21
be0b3f82 22 if (!skip_prefix(name, "refs/", &name))
2718ff09
LT
23 return 0;
24
2718ff09 25 /* REF_NORMAL means that we don't want the magic fake tag refs */
8d9c5010 26 if ((flags & REF_NORMAL) && check_refname_format(name, 0))
2718ff09
LT
27 return 0;
28
29 /* REF_HEADS means that we want regular branch heads */
be0b3f82 30 if ((flags & REF_HEADS) && starts_with(name, "heads/"))
2718ff09
LT
31 return 1;
32
33 /* REF_TAGS means that we want tags */
be0b3f82 34 if ((flags & REF_TAGS) && starts_with(name, "tags/"))
2718ff09
LT
35 return 1;
36
37 /* All type bits clear means that we are ok with anything */
38 return !(flags & ~REF_NORMAL);
39}
40
4577370e
DB
41int check_ref_type(const struct ref *ref, int flags)
42{
be0b3f82 43 return check_ref(ref->name, flags);
4577370e
DB
44}
45
46284dd1
HV
46static void die_initial_contact(int got_at_least_one_head)
47{
48 if (got_at_least_one_head)
49 die("The remote end hung up upon initial contact");
50 else
51 die("Could not read from remote repository.\n\n"
52 "Please make sure you have the correct access rights\n"
53 "and the repository exists.");
54}
55
a45b5f05
JH
56static void parse_one_symref_info(struct string_list *symref, const char *val, int len)
57{
58 char *sym, *target;
59 struct string_list_item *item;
60
61 if (!len)
62 return; /* just "symref" */
63 /* e.g. "symref=HEAD:refs/heads/master" */
5c0b13f8 64 sym = xmemdupz(val, len);
a45b5f05
JH
65 target = strchr(sym, ':');
66 if (!target)
67 /* just "symref=something" */
68 goto reject;
69 *(target++) = '\0';
70 if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) ||
71 check_refname_format(target, REFNAME_ALLOW_ONELEVEL))
72 /* "symref=bogus:pair */
73 goto reject;
74 item = string_list_append(symref, sym);
75 item->util = target;
76 return;
77reject:
78 free(sym);
79 return;
80}
81
82static void annotate_refs_with_symref_info(struct ref *ref)
83{
84 struct string_list symref = STRING_LIST_INIT_DUP;
85 const char *feature_list = server_capabilities;
86
87 while (feature_list) {
88 int len;
89 const char *val;
90
91 val = parse_feature_value(feature_list, "symref", &len);
92 if (!val)
93 break;
94 parse_one_symref_info(&symref, val, len);
95 feature_list = val + 1;
96 }
3383e199 97 string_list_sort(&symref);
a45b5f05
JH
98
99 for (; ref; ref = ref->next) {
100 struct string_list_item *item;
101 item = string_list_lookup(&symref, ref->name);
102 if (!item)
103 continue;
104 ref->symref = xstrdup((char *)item->util);
105 }
106 string_list_clear(&symref, 0);
107}
108
d1c133f5
LT
109/*
110 * Read all the refs from the other end
111 */
85edf4f5
JK
112struct ref **get_remote_heads(int in, char *src_buf, size_t src_len,
113 struct ref **list, unsigned int flags,
b06dcd7d
NTND
114 struct sha1_array *extra_have,
115 struct sha1_array *shallow_points)
d1c133f5 116{
a45b5f05 117 struct ref **orig_list = list;
46284dd1
HV
118 int got_at_least_one_head = 0;
119
d1c133f5
LT
120 *list = NULL;
121 for (;;) {
122 struct ref *ref;
e96b16cc 123 struct object_id old_oid;
d1c133f5 124 char *name;
211b5f9e 125 int len, name_len;
74543a04 126 char *buffer = packet_buffer;
ae021d87 127 const char *arg;
d1c133f5 128
85edf4f5 129 len = packet_read(in, &src_buf, &src_len,
4981fe75 130 packet_buffer, sizeof(packet_buffer),
819b929d
JK
131 PACKET_READ_GENTLE_ON_EOF |
132 PACKET_READ_CHOMP_NEWLINE);
46284dd1
HV
133 if (len < 0)
134 die_initial_contact(got_at_least_one_head);
135
d1c133f5
LT
136 if (!len)
137 break;
d1c133f5 138
ae021d87
JK
139 if (len > 4 && skip_prefix(buffer, "ERR ", &arg))
140 die("remote error: %s", arg);
a8073289 141
e96b16cc 142 if (len == GIT_SHA1_HEXSZ + strlen("shallow ") &&
143 skip_prefix(buffer, "shallow ", &arg)) {
144 if (get_oid_hex(arg, &old_oid))
ae021d87 145 die("protocol error: expected shallow sha-1, got '%s'", arg);
b06dcd7d
NTND
146 if (!shallow_points)
147 die("repository on the other end cannot be shallow");
e96b16cc 148 sha1_array_append(shallow_points, old_oid.hash);
b06dcd7d
NTND
149 continue;
150 }
151
e96b16cc 152 if (len < GIT_SHA1_HEXSZ + 2 || get_oid_hex(buffer, &old_oid) ||
153 buffer[GIT_SHA1_HEXSZ] != ' ')
d1c133f5 154 die("protocol error: expected sha/ref, got '%s'", buffer);
e96b16cc 155 name = buffer + GIT_SHA1_HEXSZ + 1;
1a7141ff 156
211b5f9e 157 name_len = strlen(name);
e96b16cc 158 if (len != name_len + GIT_SHA1_HEXSZ + 1) {
8e0f7003 159 free(server_capabilities);
9befac47 160 server_capabilities = xstrdup(name + name_len + 1);
211b5f9e
JS
161 }
162
2ae7f90f 163 if (extra_have && !strcmp(name, ".have")) {
e96b16cc 164 sha1_array_append(extra_have, old_oid.hash);
40c155ff
JH
165 continue;
166 }
167
be0b3f82 168 if (!check_ref(name, flags))
cfee10a7 169 continue;
e96b16cc 170 ref = alloc_ref(buffer + GIT_SHA1_HEXSZ + 1);
171 oidcpy(&ref->old_oid, &old_oid);
d1c133f5
LT
172 *list = ref;
173 list = &ref->next;
46284dd1 174 got_at_least_one_head = 1;
d1c133f5 175 }
a45b5f05
JH
176
177 annotate_refs_with_symref_info(*orig_list);
178
d1c133f5
LT
179 return list;
180}
181
5d54cffc 182static const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp)
f47182c8
JH
183{
184 int len;
185
186 if (!feature_list)
187 return NULL;
188
189 len = strlen(feature);
190 while (*feature_list) {
191 const char *found = strstr(feature_list, feature);
192 if (!found)
193 return NULL;
94427108
JK
194 if (feature_list == found || isspace(found[-1])) {
195 const char *value = found + len;
196 /* feature with no value (e.g., "thin-pack") */
197 if (!*value || isspace(*value)) {
198 if (lenp)
199 *lenp = 0;
200 return value;
201 }
202 /* feature with a value (e.g., "agent=git/1.2.3") */
203 else if (*value == '=') {
204 value++;
205 if (lenp)
206 *lenp = strcspn(value, " \t\n");
207 return value;
208 }
209 /*
210 * otherwise we matched a substring of another feature;
211 * keep looking
212 */
213 }
f47182c8
JH
214 feature_list = found + 1;
215 }
216 return NULL;
211b5f9e
JS
217}
218
94427108
JK
219int parse_feature_request(const char *feature_list, const char *feature)
220{
221 return !!parse_feature_value(feature_list, feature, NULL);
222}
223
224const char *server_feature_value(const char *feature, int *len)
225{
226 return parse_feature_value(server_capabilities, feature, len);
227}
228
229int server_supports(const char *feature)
230{
231 return !!server_feature_value(feature, NULL);
232}
233
2386d658
LT
234enum protocol {
235 PROTO_LOCAL = 1,
c59ab2e5 236 PROTO_FILE,
2386d658 237 PROTO_SSH,
4b05548f 238 PROTO_GIT
2386d658
LT
239};
240
c59ab2e5
TB
241int url_is_local_not_ssh(const char *url)
242{
243 const char *colon = strchr(url, ':');
244 const char *slash = strchr(url, '/');
245 return !colon || (slash && slash < colon) ||
246 has_dos_drive_prefix(url);
247}
248
5610b7c0
TB
249static const char *prot_name(enum protocol protocol)
250{
251 switch (protocol) {
252 case PROTO_LOCAL:
c59ab2e5 253 case PROTO_FILE:
5610b7c0
TB
254 return "file";
255 case PROTO_SSH:
256 return "ssh";
257 case PROTO_GIT:
258 return "git";
259 default:
83e6bda3 260 return "unknown protocol";
5610b7c0
TB
261 }
262}
263
2386d658
LT
264static enum protocol get_protocol(const char *name)
265{
266 if (!strcmp(name, "ssh"))
267 return PROTO_SSH;
268 if (!strcmp(name, "git"))
269 return PROTO_GIT;
07c7782c 270 if (!strcmp(name, "git+ssh")) /* deprecated - do not use */
c05186cc 271 return PROTO_SSH;
07c7782c 272 if (!strcmp(name, "ssh+git")) /* deprecated - do not use */
c05186cc 273 return PROTO_SSH;
72a4f4b6 274 if (!strcmp(name, "file"))
c59ab2e5 275 return PROTO_FILE;
2386d658
LT
276 die("I don't handle protocol '%s'", name);
277}
278
86ceb337
TB
279static char *host_end(char **hoststart, int removebrackets)
280{
281 char *host = *hoststart;
282 char *end;
283 char *start = strstr(host, "@[");
284 if (start)
285 start++; /* Jump over '@' */
286 else
287 start = host;
288 if (start[0] == '[') {
289 end = strchr(start + 1, ']');
290 if (end) {
291 if (removebrackets) {
292 *end = 0;
293 memmove(start, start + 1, end - start);
294 end++;
295 }
296 } else
297 end = host;
298 } else
299 end = host;
300 return end;
301}
302
5ba88448
YH
303#define STR_(s) # s
304#define STR(s) STR_(s)
2386d658 305
72a534da
ML
306static void get_host_and_port(char **host, const char **port)
307{
308 char *colon, *end;
86ceb337 309 end = host_end(host, 1);
72a534da 310 colon = strchr(end, ':');
72a534da 311 if (colon) {
86ceb337
TB
312 long portnr = strtol(colon + 1, &end, 10);
313 if (end != colon + 1 && *end == '\0' && 0 <= portnr && portnr < 65536) {
314 *colon = 0;
315 *port = colon + 1;
6b6c5f7a
TB
316 } else if (!colon[1]) {
317 *colon = 0;
86ceb337 318 }
72a534da
ML
319 }
320}
321
e47a8583
EW
322static void enable_keepalive(int sockfd)
323{
324 int ka = 1;
325
326 if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0)
327 fprintf(stderr, "unable to set SO_KEEPALIVE on socket: %s\n",
328 strerror(errno));
329}
330
49744d63 331#ifndef NO_IPV6
4c505f71 332
ba505322
AR
333static const char *ai_name(const struct addrinfo *ai)
334{
785a9857
BK
335 static char addr[NI_MAXHOST];
336 if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0,
337 NI_NUMERICHOST) != 0)
5096d490 338 xsnprintf(addr, sizeof(addr), "(unknown)");
785a9857 339
ba505322
AR
340 return addr;
341}
342
5ad312be
JL
343/*
344 * Returns a connected socket() fd, or else die()s.
345 */
7841ce79 346static int git_tcp_connect_sock(char *host, int flags)
2386d658 347{
63a995b6
DZ
348 struct strbuf error_message = STRBUF_INIT;
349 int sockfd = -1;
554fe20d 350 const char *port = STR(DEFAULT_GIT_PORT);
5ba88448
YH
351 struct addrinfo hints, *ai0, *ai;
352 int gai;
ba505322 353 int cnt = 0;
5ba88448 354
72a534da
ML
355 get_host_and_port(&host, &port);
356 if (!*port)
357 port = "<none>";
5ba88448
YH
358
359 memset(&hints, 0, sizeof(hints));
c915f11e
EW
360 if (flags & CONNECT_IPV4)
361 hints.ai_family = AF_INET;
362 else if (flags & CONNECT_IPV6)
363 hints.ai_family = AF_INET6;
5ba88448
YH
364 hints.ai_socktype = SOCK_STREAM;
365 hints.ai_protocol = IPPROTO_TCP;
366
7841ce79
MT
367 if (flags & CONNECT_VERBOSE)
368 fprintf(stderr, "Looking up %s ... ", host);
369
5ba88448
YH
370 gai = getaddrinfo(host, port, &hints, &ai);
371 if (gai)
608d48b2 372 die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai));
5ba88448 373
7841ce79
MT
374 if (flags & CONNECT_VERBOSE)
375 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
376
e08afecd 377 for (ai0 = ai; ai; ai = ai->ai_next, cnt++) {
5ad312be
JL
378 sockfd = socket(ai->ai_family,
379 ai->ai_socktype, ai->ai_protocol);
63a995b6
DZ
380 if ((sockfd < 0) ||
381 (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) {
382 strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
383 host, cnt, ai_name(ai), strerror(errno));
384 if (0 <= sockfd)
385 close(sockfd);
5ba88448
YH
386 sockfd = -1;
387 continue;
2386d658 388 }
ba505322
AR
389 if (flags & CONNECT_VERBOSE)
390 fprintf(stderr, "%s ", ai_name(ai));
5ba88448 391 break;
2386d658
LT
392 }
393
5ba88448 394 freeaddrinfo(ai0);
2386d658 395
2386d658 396 if (sockfd < 0)
63a995b6 397 die("unable to connect to %s:\n%s", host, error_message.buf);
5ba88448 398
e47a8583
EW
399 enable_keepalive(sockfd);
400
7841ce79
MT
401 if (flags & CONNECT_VERBOSE)
402 fprintf(stderr, "done.\n");
403
63a995b6
DZ
404 strbuf_release(&error_message);
405
5ad312be 406 return sockfd;
2386d658
LT
407}
408
49744d63 409#else /* NO_IPV6 */
4c505f71 410
5ad312be
JL
411/*
412 * Returns a connected socket() fd, or else die()s.
413 */
7841ce79 414static int git_tcp_connect_sock(char *host, int flags)
4c505f71 415{
7203a2d1
EFL
416 struct strbuf error_message = STRBUF_INIT;
417 int sockfd = -1;
72a534da
ML
418 const char *port = STR(DEFAULT_GIT_PORT);
419 char *ep;
4c505f71
PA
420 struct hostent *he;
421 struct sockaddr_in sa;
422 char **ap;
423 unsigned int nport;
ba505322 424 int cnt;
4c505f71 425
72a534da 426 get_host_and_port(&host, &port);
4c505f71 427
7841ce79
MT
428 if (flags & CONNECT_VERBOSE)
429 fprintf(stderr, "Looking up %s ... ", host);
430
4c505f71
PA
431 he = gethostbyname(host);
432 if (!he)
433 die("Unable to look up %s (%s)", host, hstrerror(h_errno));
434 nport = strtoul(port, &ep, 10);
435 if ( ep == port || *ep ) {
436 /* Not numeric */
437 struct servent *se = getservbyname(port,"tcp");
438 if ( !se )
d7530708 439 die("Unknown port %s", port);
4c505f71
PA
440 nport = se->s_port;
441 }
442
7841ce79
MT
443 if (flags & CONNECT_VERBOSE)
444 fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
445
ba505322 446 for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) {
4c505f71
PA
447 memset(&sa, 0, sizeof sa);
448 sa.sin_family = he->h_addrtype;
6573faff 449 sa.sin_port = htons(nport);
c6164218 450 memcpy(&sa.sin_addr, *ap, he->h_length);
4c505f71 451
7203a2d1
EFL
452 sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
453 if ((sockfd < 0) ||
454 connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
455 strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
ba505322
AR
456 host,
457 cnt,
458 inet_ntoa(*(struct in_addr *)&sa.sin_addr),
7203a2d1
EFL
459 strerror(errno));
460 if (0 <= sockfd)
461 close(sockfd);
4c505f71
PA
462 sockfd = -1;
463 continue;
464 }
ba505322
AR
465 if (flags & CONNECT_VERBOSE)
466 fprintf(stderr, "%s ",
467 inet_ntoa(*(struct in_addr *)&sa.sin_addr));
4c505f71
PA
468 break;
469 }
470
471 if (sockfd < 0)
7203a2d1 472 die("unable to connect to %s:\n%s", host, error_message.buf);
4c505f71 473
e47a8583
EW
474 enable_keepalive(sockfd);
475
7841ce79
MT
476 if (flags & CONNECT_VERBOSE)
477 fprintf(stderr, "done.\n");
478
5ad312be
JL
479 return sockfd;
480}
481
482#endif /* NO_IPV6 */
483
484
7841ce79 485static void git_tcp_connect(int fd[2], char *host, int flags)
5ad312be 486{
7841ce79 487 int sockfd = git_tcp_connect_sock(host, flags);
5ad312be 488
4c505f71 489 fd[0] = sockfd;
ec587fde 490 fd[1] = dup(sockfd);
4c505f71
PA
491}
492
4c505f71 493
96f1e58f 494static char *git_proxy_command;
f8014776 495
ef90d6d4
JS
496static int git_proxy_command_options(const char *var, const char *value,
497 void *cb)
f8014776 498{
e814bc4d 499 if (!strcmp(var, "core.gitproxy")) {
c3df8568
YH
500 const char *for_pos;
501 int matchlen = -1;
502 int hostlen;
15112c95
EFL
503 const char *rhost_name = cb;
504 int rhost_len = strlen(rhost_name);
c3df8568 505
e814bc4d 506 if (git_proxy_command)
f8014776 507 return 0;
c64b9ad0
JH
508 if (!value)
509 return config_error_nonbool(var);
e814bc4d
JH
510 /* [core]
511 * ;# matches www.kernel.org as well
512 * gitproxy = netcatter-1 for kernel.org
513 * gitproxy = netcatter-2 for sample.xz
514 * gitproxy = netcatter-default
515 */
c3df8568 516 for_pos = strstr(value, " for ");
e814bc4d
JH
517 if (!for_pos)
518 /* matches everybody */
519 matchlen = strlen(value);
520 else {
521 hostlen = strlen(for_pos + 5);
522 if (rhost_len < hostlen)
523 matchlen = -1;
524 else if (!strncmp(for_pos + 5,
525 rhost_name + rhost_len - hostlen,
526 hostlen) &&
527 ((rhost_len == hostlen) ||
528 rhost_name[rhost_len - hostlen -1] == '.'))
529 matchlen = for_pos - value;
530 else
531 matchlen = -1;
532 }
533 if (0 <= matchlen) {
534 /* core.gitproxy = none for kernel.org */
a6080a0a 535 if (matchlen == 4 &&
e814bc4d
JH
536 !memcmp(value, "none", 4))
537 matchlen = 0;
182af834 538 git_proxy_command = xmemdupz(value, matchlen);
f8014776 539 }
e814bc4d 540 return 0;
f8014776
PC
541 }
542
ef90d6d4 543 return git_default_config(var, value, cb);
f8014776
PC
544}
545
e814bc4d 546static int git_use_proxy(const char *host)
f8014776
PC
547{
548 git_proxy_command = getenv("GIT_PROXY_COMMAND");
15112c95 549 git_config(git_proxy_command_options, (void*)host);
e814bc4d 550 return (git_proxy_command && *git_proxy_command);
f8014776
PC
551}
552
5cbf8246 553static struct child_process *git_proxy_connect(int fd[2], char *host)
f8014776 554{
554fe20d 555 const char *port = STR(DEFAULT_GIT_PORT);
5cbf8246 556 struct child_process *proxy;
f8014776 557
72a534da 558 get_host_and_port(&host, &port);
f8014776 559
483bbd4e
RS
560 proxy = xmalloc(sizeof(*proxy));
561 child_process_init(proxy);
1823bea1
JK
562 argv_array_push(&proxy->args, git_proxy_command);
563 argv_array_push(&proxy->args, host);
564 argv_array_push(&proxy->args, port);
5cbf8246
JK
565 proxy->in = -1;
566 proxy->out = -1;
567 if (start_command(proxy))
1823bea1 568 die("cannot start proxy %s", git_proxy_command);
5cbf8246
JK
569 fd[0] = proxy->out; /* read from proxy stdout */
570 fd[1] = proxy->in; /* write to proxy stdin */
571 return proxy;
f8014776
PC
572}
573
86ceb337 574static char *get_port(char *host)
2e776665
LT
575{
576 char *end;
86ceb337
TB
577 char *p = strchr(host, ':');
578
2e776665 579 if (p) {
8f148253
RS
580 long port = strtol(p + 1, &end, 10);
581 if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) {
86ceb337
TB
582 *p = '\0';
583 return p+1;
2e776665
LT
584 }
585 }
586
587 return NULL;
588}
589
f7192598 590/*
cabc3c12
JS
591 * Extract protocol and relevant parts from the specified connection URL.
592 * The caller must free() the returned strings.
f7192598 593 */
cabc3c12 594static enum protocol parse_connect_url(const char *url_orig, char **ret_host,
83b05875 595 char **ret_path)
f7192598 596{
9d2e9420 597 char *url;
8e76bf3f 598 char *host, *path;
356bece0 599 char *end;
c59ab2e5 600 int separator = '/';
faea9ccb 601 enum protocol protocol = PROTO_LOCAL;
f0b7367c 602
9d2e9420
JK
603 if (is_url(url_orig))
604 url = url_decode(url_orig);
605 else
606 url = xstrdup(url_orig);
607
faea9ccb 608 host = strstr(url, "://");
eeefa7c9 609 if (host) {
faea9ccb
AE
610 *host = '\0';
611 protocol = get_protocol(url);
612 host += 3;
356bece0 613 } else {
f7192598 614 host = url;
c59ab2e5
TB
615 if (!url_is_local_not_ssh(url)) {
616 protocol = PROTO_SSH;
617 separator = ':';
618 }
356bece0
YH
619 }
620
9aa5053d 621 /*
83b05875
TB
622 * Don't do destructive transforms as protocol code does
623 * '[]' unwrapping in get_host_and_port()
9aa5053d 624 */
86ceb337 625 end = host_end(&host, 0);
356bece0 626
c59ab2e5 627 if (protocol == PROTO_LOCAL)
72a4f4b6 628 path = end;
c59ab2e5
TB
629 else if (protocol == PROTO_FILE && has_dos_drive_prefix(end))
630 path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */
631 else
632 path = strchr(end, separator);
2386d658 633
faea9ccb
AE
634 if (!path || !*path)
635 die("No path specified. See 'man git-pull' for valid url syntax");
636
637 /*
638 * null-terminate hostname and point path to ~ for URL's like this:
639 * ssh://host.xz/~user/repo
640 */
c59ab2e5
TB
641
642 end = path; /* Need to \0 terminate host here */
643 if (separator == ':')
644 path++; /* path starts after ':' */
645 if (protocol == PROTO_GIT || protocol == PROTO_SSH) {
faea9ccb
AE
646 if (path[1] == '~')
647 path++;
faea9ccb
AE
648 }
649
c59ab2e5
TB
650 path = xstrdup(path);
651 *end = '\0';
652
cabc3c12 653 *ret_host = xstrdup(host);
c59ab2e5 654 *ret_path = path;
cabc3c12
JS
655 free(url);
656 return protocol;
657}
658
d3180279 659static struct child_process no_fork = CHILD_PROCESS_INIT;
cabc3c12
JS
660
661/*
662 * This returns a dummy child_process if the transport protocol does not
663 * need fork(2), or a struct child_process object if it does. Once done,
664 * finish the connection with finish_connect() with the value returned from
665 * this function (it is safe to call finish_connect() with NULL to support
666 * the former case).
667 *
668 * If it returns, the connect is successful; it just dies on errors (this
669 * will hopefully be changed in a libification effort, to return NULL when
670 * the connection failed).
671 */
672struct child_process *git_connect(int fd[2], const char *url,
673 const char *prog, int flags)
674{
a2036d7e 675 char *hostandport, *path;
cabc3c12
JS
676 struct child_process *conn = &no_fork;
677 enum protocol protocol;
cabc3c12
JS
678 struct strbuf cmd = STRBUF_INIT;
679
680 /* Without this we cannot rely on waitpid() to tell
681 * what happened to our children.
2e776665 682 */
cabc3c12 683 signal(SIGCHLD, SIG_DFL);
2e776665 684
a2036d7e 685 protocol = parse_connect_url(url, &hostandport, &path);
3f55ccab 686 if ((flags & CONNECT_DIAG_URL) && (protocol != PROTO_SSH)) {
5610b7c0
TB
687 printf("Diag: url=%s\n", url ? url : "NULL");
688 printf("Diag: protocol=%s\n", prot_name(protocol));
a2036d7e 689 printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL");
5610b7c0 690 printf("Diag: path=%s\n", path ? path : "NULL");
a2036d7e
TB
691 conn = NULL;
692 } else if (protocol == PROTO_GIT) {
94bc83c5
JK
693 /*
694 * Set up virtual host information based on where we will
695 * connect, unless the user has overridden us in
696 * the environment.
697 */
698 char *target_host = getenv("GIT_OVERRIDE_VIRTUAL_HOST");
699 if (target_host)
700 target_host = xstrdup(target_host);
701 else
702 target_host = xstrdup(hostandport);
703
a5adaced
JK
704 transport_check_allowed("git");
705
5ad312be
JL
706 /* These underlying connection commands die() if they
707 * cannot connect.
708 */
a2036d7e
TB
709 if (git_use_proxy(hostandport))
710 conn = git_proxy_connect(fd, hostandport);
da2a95b2 711 else
a2036d7e 712 git_tcp_connect(fd, hostandport, flags);
5ad312be
JL
713 /*
714 * Separate original protocol components prog and path
73bb33a9
SP
715 * from extended host header with a NUL byte.
716 *
717 * Note: Do not add any other headers here! Doing so
718 * will cause older git-daemon servers to crash.
5ad312be
JL
719 */
720 packet_write(fd[1],
721 "%s %s%chost=%s%c",
722 prog, path, 0,
723 target_host, 0);
724 free(target_host);
a2036d7e 725 } else {
483bbd4e
RS
726 conn = xmalloc(sizeof(*conn));
727 child_process_init(conn);
a2036d7e
TB
728
729 strbuf_addstr(&cmd, prog);
730 strbuf_addch(&cmd, ' ');
731 sq_quote_buf(&cmd, path);
732
aab40438
JK
733 /* remove repo-local variables from the environment */
734 conn->env = local_repo_env;
a48b409f 735 conn->use_shell = 1;
a2036d7e 736 conn->in = conn->out = -1;
a2036d7e 737 if (protocol == PROTO_SSH) {
39942766 738 const char *ssh;
a48b409f 739 int putty = 0, tortoiseplink = 0;
a2036d7e
TB
740 char *ssh_host = hostandport;
741 const char *port = NULL;
a5adaced 742 transport_check_allowed("ssh");
a2036d7e 743 get_host_and_port(&ssh_host, &port);
a2036d7e 744
86ceb337
TB
745 if (!port)
746 port = get_port(ssh_host);
42da4840 747
3f55ccab
TB
748 if (flags & CONNECT_DIAG_URL) {
749 printf("Diag: url=%s\n", url ? url : "NULL");
750 printf("Diag: protocol=%s\n", prot_name(protocol));
751 printf("Diag: userandhost=%s\n", ssh_host ? ssh_host : "NULL");
752 printf("Diag: port=%s\n", port ? port : "NONE");
753 printf("Diag: path=%s\n", path ? path : "NULL");
a2036d7e 754
3f55ccab
TB
755 free(hostandport);
756 free(path);
04f20c04 757 free(conn);
3f55ccab 758 return NULL;
37ee646e 759 }
760
761 ssh = getenv("GIT_SSH_COMMAND");
a48b409f 762 if (!ssh) {
baaf2337 763 const char *base;
764 char *ssh_dup;
765
a48b409f
JK
766 /*
767 * GIT_SSH is the no-shell version of
768 * GIT_SSH_COMMAND (and must remain so for
769 * historical compatibility).
770 */
771 conn->use_shell = 0;
772
37ee646e 773 ssh = getenv("GIT_SSH");
774 if (!ssh)
775 ssh = "ssh";
baaf2337 776
777 ssh_dup = xstrdup(ssh);
778 base = basename(ssh_dup);
779
780 tortoiseplink = !strcasecmp(base, "tortoiseplink") ||
781 !strcasecmp(base, "tortoiseplink.exe");
a48b409f
JK
782 putty = tortoiseplink ||
783 !strcasecmp(base, "plink") ||
784 !strcasecmp(base, "plink.exe");
baaf2337 785
786 free(ssh_dup);
37ee646e 787 }
788
789 argv_array_push(&conn->args, ssh);
c915f11e
EW
790 if (flags & CONNECT_IPV4)
791 argv_array_push(&conn->args, "-4");
792 else if (flags & CONNECT_IPV6)
793 argv_array_push(&conn->args, "-6");
baaf2337 794 if (tortoiseplink)
37ee646e 795 argv_array_push(&conn->args, "-batch");
796 if (port) {
797 /* P is for PuTTY, p is for OpenSSH */
798 argv_array_push(&conn->args, putty ? "-P" : "-p");
799 argv_array_push(&conn->args, port);
a2036d7e 800 }
37ee646e 801 argv_array_push(&conn->args, ssh_host);
c049b61d 802 } else {
a5adaced 803 transport_check_allowed("file");
4852f723 804 }
1823bea1 805 argv_array_push(&conn->args, cmd.buf);
f364cb88 806
a2036d7e
TB
807 if (start_command(conn))
808 die("unable to fork");
f364cb88 809
a2036d7e
TB
810 fd[0] = conn->out; /* read from child's stdout */
811 fd[1] = conn->in; /* write to child's stdin */
812 strbuf_release(&cmd);
813 }
814 free(hostandport);
cabc3c12 815 free(path);
98158e9c 816 return conn;
f7192598
LT
817}
818
7ffe853b
JK
819int git_connection_is_socket(struct child_process *conn)
820{
821 return conn == &no_fork;
822}
823
98158e9c 824int finish_connect(struct child_process *conn)
f7192598 825{
f364cb88 826 int code;
7ffe853b 827 if (!conn || git_connection_is_socket(conn))
f42a5c4e
FBH
828 return 0;
829
f364cb88 830 code = finish_command(conn);
98158e9c 831 free(conn);
f364cb88 832 return code;
f7192598 833}