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Commit | Line | Data |
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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" |
f7192598 | 12 | |
96f1e58f | 13 | static char *server_capabilities; |
5d54cffc | 14 | static const char *parse_feature_value(const char *, const char *, int *); |
211b5f9e | 15 | |
2718ff09 LT |
16 | static int check_ref(const char *name, int len, unsigned int flags) |
17 | { | |
18 | if (!flags) | |
19 | return 1; | |
20 | ||
c41e20b3 | 21 | if (len < 5 || memcmp(name, "refs/", 5)) |
2718ff09 LT |
22 | return 0; |
23 | ||
24 | /* Skip the "refs/" part */ | |
25 | name += 5; | |
26 | len -= 5; | |
27 | ||
28 | /* REF_NORMAL means that we don't want the magic fake tag refs */ | |
8d9c5010 | 29 | if ((flags & REF_NORMAL) && check_refname_format(name, 0)) |
2718ff09 LT |
30 | return 0; |
31 | ||
32 | /* REF_HEADS means that we want regular branch heads */ | |
33 | if ((flags & REF_HEADS) && !memcmp(name, "heads/", 6)) | |
34 | return 1; | |
35 | ||
36 | /* REF_TAGS means that we want tags */ | |
37 | if ((flags & REF_TAGS) && !memcmp(name, "tags/", 5)) | |
38 | return 1; | |
39 | ||
40 | /* All type bits clear means that we are ok with anything */ | |
41 | return !(flags & ~REF_NORMAL); | |
42 | } | |
43 | ||
4577370e DB |
44 | int check_ref_type(const struct ref *ref, int flags) |
45 | { | |
46 | return check_ref(ref->name, strlen(ref->name), flags); | |
47 | } | |
48 | ||
46284dd1 HV |
49 | static void die_initial_contact(int got_at_least_one_head) |
50 | { | |
51 | if (got_at_least_one_head) | |
52 | die("The remote end hung up upon initial contact"); | |
53 | else | |
54 | die("Could not read from remote repository.\n\n" | |
55 | "Please make sure you have the correct access rights\n" | |
56 | "and the repository exists."); | |
57 | } | |
58 | ||
a45b5f05 JH |
59 | static void parse_one_symref_info(struct string_list *symref, const char *val, int len) |
60 | { | |
61 | char *sym, *target; | |
62 | struct string_list_item *item; | |
63 | ||
64 | if (!len) | |
65 | return; /* just "symref" */ | |
66 | /* e.g. "symref=HEAD:refs/heads/master" */ | |
67 | sym = xmalloc(len + 1); | |
68 | memcpy(sym, val, len); | |
69 | sym[len] = '\0'; | |
70 | target = strchr(sym, ':'); | |
71 | if (!target) | |
72 | /* just "symref=something" */ | |
73 | goto reject; | |
74 | *(target++) = '\0'; | |
75 | if (check_refname_format(sym, REFNAME_ALLOW_ONELEVEL) || | |
76 | check_refname_format(target, REFNAME_ALLOW_ONELEVEL)) | |
77 | /* "symref=bogus:pair */ | |
78 | goto reject; | |
79 | item = string_list_append(symref, sym); | |
80 | item->util = target; | |
81 | return; | |
82 | reject: | |
83 | free(sym); | |
84 | return; | |
85 | } | |
86 | ||
87 | static void annotate_refs_with_symref_info(struct ref *ref) | |
88 | { | |
89 | struct string_list symref = STRING_LIST_INIT_DUP; | |
90 | const char *feature_list = server_capabilities; | |
91 | ||
92 | while (feature_list) { | |
93 | int len; | |
94 | const char *val; | |
95 | ||
96 | val = parse_feature_value(feature_list, "symref", &len); | |
97 | if (!val) | |
98 | break; | |
99 | parse_one_symref_info(&symref, val, len); | |
100 | feature_list = val + 1; | |
101 | } | |
102 | sort_string_list(&symref); | |
103 | ||
104 | for (; ref; ref = ref->next) { | |
105 | struct string_list_item *item; | |
106 | item = string_list_lookup(&symref, ref->name); | |
107 | if (!item) | |
108 | continue; | |
109 | ref->symref = xstrdup((char *)item->util); | |
110 | } | |
111 | string_list_clear(&symref, 0); | |
112 | } | |
113 | ||
d1c133f5 LT |
114 | /* |
115 | * Read all the refs from the other end | |
116 | */ | |
85edf4f5 JK |
117 | struct ref **get_remote_heads(int in, char *src_buf, size_t src_len, |
118 | struct ref **list, unsigned int flags, | |
b06dcd7d NTND |
119 | struct sha1_array *extra_have, |
120 | struct sha1_array *shallow_points) | |
d1c133f5 | 121 | { |
a45b5f05 | 122 | struct ref **orig_list = list; |
46284dd1 HV |
123 | int got_at_least_one_head = 0; |
124 | ||
d1c133f5 LT |
125 | *list = NULL; |
126 | for (;;) { | |
127 | struct ref *ref; | |
128 | unsigned char old_sha1[20]; | |
d1c133f5 | 129 | char *name; |
211b5f9e | 130 | int len, name_len; |
74543a04 | 131 | char *buffer = packet_buffer; |
ae021d87 | 132 | const char *arg; |
d1c133f5 | 133 | |
85edf4f5 | 134 | len = packet_read(in, &src_buf, &src_len, |
4981fe75 | 135 | packet_buffer, sizeof(packet_buffer), |
819b929d JK |
136 | PACKET_READ_GENTLE_ON_EOF | |
137 | PACKET_READ_CHOMP_NEWLINE); | |
46284dd1 HV |
138 | if (len < 0) |
139 | die_initial_contact(got_at_least_one_head); | |
140 | ||
d1c133f5 LT |
141 | if (!len) |
142 | break; | |
d1c133f5 | 143 | |
ae021d87 JK |
144 | if (len > 4 && skip_prefix(buffer, "ERR ", &arg)) |
145 | die("remote error: %s", arg); | |
a8073289 | 146 | |
ae021d87 JK |
147 | if (len == 48 && skip_prefix(buffer, "shallow ", &arg)) { |
148 | if (get_sha1_hex(arg, old_sha1)) | |
149 | die("protocol error: expected shallow sha-1, got '%s'", arg); | |
b06dcd7d NTND |
150 | if (!shallow_points) |
151 | die("repository on the other end cannot be shallow"); | |
152 | sha1_array_append(shallow_points, old_sha1); | |
153 | continue; | |
154 | } | |
155 | ||
d1c133f5 LT |
156 | if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ') |
157 | die("protocol error: expected sha/ref, got '%s'", buffer); | |
158 | name = buffer + 41; | |
1a7141ff | 159 | |
211b5f9e JS |
160 | name_len = strlen(name); |
161 | if (len != name_len + 41) { | |
8e0f7003 | 162 | free(server_capabilities); |
9befac47 | 163 | server_capabilities = xstrdup(name + name_len + 1); |
211b5f9e JS |
164 | } |
165 | ||
40c155ff JH |
166 | if (extra_have && |
167 | name_len == 5 && !memcmp(".have", name, 5)) { | |
13eb4626 | 168 | sha1_array_append(extra_have, old_sha1); |
40c155ff JH |
169 | continue; |
170 | } | |
171 | ||
2718ff09 | 172 | if (!check_ref(name, name_len, flags)) |
cfee10a7 | 173 | continue; |
59c69c0c | 174 | ref = alloc_ref(buffer + 41); |
e702496e | 175 | hashcpy(ref->old_sha1, old_sha1); |
d1c133f5 LT |
176 | *list = ref; |
177 | list = &ref->next; | |
46284dd1 | 178 | got_at_least_one_head = 1; |
d1c133f5 | 179 | } |
a45b5f05 JH |
180 | |
181 | annotate_refs_with_symref_info(*orig_list); | |
182 | ||
d1c133f5 LT |
183 | return list; |
184 | } | |
185 | ||
5d54cffc | 186 | static const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp) |
f47182c8 JH |
187 | { |
188 | int len; | |
189 | ||
190 | if (!feature_list) | |
191 | return NULL; | |
192 | ||
193 | len = strlen(feature); | |
194 | while (*feature_list) { | |
195 | const char *found = strstr(feature_list, feature); | |
196 | if (!found) | |
197 | return NULL; | |
94427108 JK |
198 | if (feature_list == found || isspace(found[-1])) { |
199 | const char *value = found + len; | |
200 | /* feature with no value (e.g., "thin-pack") */ | |
201 | if (!*value || isspace(*value)) { | |
202 | if (lenp) | |
203 | *lenp = 0; | |
204 | return value; | |
205 | } | |
206 | /* feature with a value (e.g., "agent=git/1.2.3") */ | |
207 | else if (*value == '=') { | |
208 | value++; | |
209 | if (lenp) | |
210 | *lenp = strcspn(value, " \t\n"); | |
211 | return value; | |
212 | } | |
213 | /* | |
214 | * otherwise we matched a substring of another feature; | |
215 | * keep looking | |
216 | */ | |
217 | } | |
f47182c8 JH |
218 | feature_list = found + 1; |
219 | } | |
220 | return NULL; | |
211b5f9e JS |
221 | } |
222 | ||
94427108 JK |
223 | int parse_feature_request(const char *feature_list, const char *feature) |
224 | { | |
225 | return !!parse_feature_value(feature_list, feature, NULL); | |
226 | } | |
227 | ||
228 | const char *server_feature_value(const char *feature, int *len) | |
229 | { | |
230 | return parse_feature_value(server_capabilities, feature, len); | |
231 | } | |
232 | ||
233 | int server_supports(const char *feature) | |
234 | { | |
235 | return !!server_feature_value(feature, NULL); | |
236 | } | |
237 | ||
2386d658 LT |
238 | enum protocol { |
239 | PROTO_LOCAL = 1, | |
c59ab2e5 | 240 | PROTO_FILE, |
2386d658 | 241 | PROTO_SSH, |
4b05548f | 242 | PROTO_GIT |
2386d658 LT |
243 | }; |
244 | ||
c59ab2e5 TB |
245 | int url_is_local_not_ssh(const char *url) |
246 | { | |
247 | const char *colon = strchr(url, ':'); | |
248 | const char *slash = strchr(url, '/'); | |
249 | return !colon || (slash && slash < colon) || | |
250 | has_dos_drive_prefix(url); | |
251 | } | |
252 | ||
5610b7c0 TB |
253 | static const char *prot_name(enum protocol protocol) |
254 | { | |
255 | switch (protocol) { | |
256 | case PROTO_LOCAL: | |
c59ab2e5 | 257 | case PROTO_FILE: |
5610b7c0 TB |
258 | return "file"; |
259 | case PROTO_SSH: | |
260 | return "ssh"; | |
261 | case PROTO_GIT: | |
262 | return "git"; | |
263 | default: | |
264 | return "unkown protocol"; | |
265 | } | |
266 | } | |
267 | ||
2386d658 LT |
268 | static enum protocol get_protocol(const char *name) |
269 | { | |
270 | if (!strcmp(name, "ssh")) | |
271 | return PROTO_SSH; | |
272 | if (!strcmp(name, "git")) | |
273 | return PROTO_GIT; | |
c05186cc LT |
274 | if (!strcmp(name, "git+ssh")) |
275 | return PROTO_SSH; | |
276 | if (!strcmp(name, "ssh+git")) | |
277 | return PROTO_SSH; | |
72a4f4b6 | 278 | if (!strcmp(name, "file")) |
c59ab2e5 | 279 | return PROTO_FILE; |
2386d658 LT |
280 | die("I don't handle protocol '%s'", name); |
281 | } | |
282 | ||
5ba88448 YH |
283 | #define STR_(s) # s |
284 | #define STR(s) STR_(s) | |
2386d658 | 285 | |
72a534da ML |
286 | static void get_host_and_port(char **host, const char **port) |
287 | { | |
288 | char *colon, *end; | |
289 | ||
290 | if (*host[0] == '[') { | |
291 | end = strchr(*host + 1, ']'); | |
292 | if (end) { | |
293 | *end = 0; | |
294 | end++; | |
295 | (*host)++; | |
296 | } else | |
297 | end = *host; | |
298 | } else | |
299 | end = *host; | |
300 | colon = strchr(end, ':'); | |
301 | ||
302 | if (colon) { | |
303 | *colon = 0; | |
304 | *port = colon + 1; | |
305 | } | |
306 | } | |
307 | ||
e47a8583 EW |
308 | static void enable_keepalive(int sockfd) |
309 | { | |
310 | int ka = 1; | |
311 | ||
312 | if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0) | |
313 | fprintf(stderr, "unable to set SO_KEEPALIVE on socket: %s\n", | |
314 | strerror(errno)); | |
315 | } | |
316 | ||
49744d63 | 317 | #ifndef NO_IPV6 |
4c505f71 | 318 | |
ba505322 AR |
319 | static const char *ai_name(const struct addrinfo *ai) |
320 | { | |
785a9857 BK |
321 | static char addr[NI_MAXHOST]; |
322 | if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0, | |
323 | NI_NUMERICHOST) != 0) | |
ba505322 | 324 | strcpy(addr, "(unknown)"); |
785a9857 | 325 | |
ba505322 AR |
326 | return addr; |
327 | } | |
328 | ||
5ad312be JL |
329 | /* |
330 | * Returns a connected socket() fd, or else die()s. | |
331 | */ | |
7841ce79 | 332 | static int git_tcp_connect_sock(char *host, int flags) |
2386d658 | 333 | { |
63a995b6 DZ |
334 | struct strbuf error_message = STRBUF_INIT; |
335 | int sockfd = -1; | |
554fe20d | 336 | const char *port = STR(DEFAULT_GIT_PORT); |
5ba88448 YH |
337 | struct addrinfo hints, *ai0, *ai; |
338 | int gai; | |
ba505322 | 339 | int cnt = 0; |
5ba88448 | 340 | |
72a534da ML |
341 | get_host_and_port(&host, &port); |
342 | if (!*port) | |
343 | port = "<none>"; | |
5ba88448 YH |
344 | |
345 | memset(&hints, 0, sizeof(hints)); | |
346 | hints.ai_socktype = SOCK_STREAM; | |
347 | hints.ai_protocol = IPPROTO_TCP; | |
348 | ||
7841ce79 MT |
349 | if (flags & CONNECT_VERBOSE) |
350 | fprintf(stderr, "Looking up %s ... ", host); | |
351 | ||
5ba88448 YH |
352 | gai = getaddrinfo(host, port, &hints, &ai); |
353 | if (gai) | |
608d48b2 | 354 | die("Unable to look up %s (port %s) (%s)", host, port, gai_strerror(gai)); |
5ba88448 | 355 | |
7841ce79 MT |
356 | if (flags & CONNECT_VERBOSE) |
357 | fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port); | |
358 | ||
e08afecd | 359 | for (ai0 = ai; ai; ai = ai->ai_next, cnt++) { |
5ad312be JL |
360 | sockfd = socket(ai->ai_family, |
361 | ai->ai_socktype, ai->ai_protocol); | |
63a995b6 DZ |
362 | if ((sockfd < 0) || |
363 | (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) { | |
364 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
365 | host, cnt, ai_name(ai), strerror(errno)); | |
366 | if (0 <= sockfd) | |
367 | close(sockfd); | |
5ba88448 YH |
368 | sockfd = -1; |
369 | continue; | |
2386d658 | 370 | } |
ba505322 AR |
371 | if (flags & CONNECT_VERBOSE) |
372 | fprintf(stderr, "%s ", ai_name(ai)); | |
5ba88448 | 373 | break; |
2386d658 LT |
374 | } |
375 | ||
5ba88448 | 376 | freeaddrinfo(ai0); |
2386d658 | 377 | |
2386d658 | 378 | if (sockfd < 0) |
63a995b6 | 379 | die("unable to connect to %s:\n%s", host, error_message.buf); |
5ba88448 | 380 | |
e47a8583 EW |
381 | enable_keepalive(sockfd); |
382 | ||
7841ce79 MT |
383 | if (flags & CONNECT_VERBOSE) |
384 | fprintf(stderr, "done.\n"); | |
385 | ||
63a995b6 DZ |
386 | strbuf_release(&error_message); |
387 | ||
5ad312be | 388 | return sockfd; |
2386d658 LT |
389 | } |
390 | ||
49744d63 | 391 | #else /* NO_IPV6 */ |
4c505f71 | 392 | |
5ad312be JL |
393 | /* |
394 | * Returns a connected socket() fd, or else die()s. | |
395 | */ | |
7841ce79 | 396 | static int git_tcp_connect_sock(char *host, int flags) |
4c505f71 | 397 | { |
7203a2d1 EFL |
398 | struct strbuf error_message = STRBUF_INIT; |
399 | int sockfd = -1; | |
72a534da ML |
400 | const char *port = STR(DEFAULT_GIT_PORT); |
401 | char *ep; | |
4c505f71 PA |
402 | struct hostent *he; |
403 | struct sockaddr_in sa; | |
404 | char **ap; | |
405 | unsigned int nport; | |
ba505322 | 406 | int cnt; |
4c505f71 | 407 | |
72a534da | 408 | get_host_and_port(&host, &port); |
4c505f71 | 409 | |
7841ce79 MT |
410 | if (flags & CONNECT_VERBOSE) |
411 | fprintf(stderr, "Looking up %s ... ", host); | |
412 | ||
4c505f71 PA |
413 | he = gethostbyname(host); |
414 | if (!he) | |
415 | die("Unable to look up %s (%s)", host, hstrerror(h_errno)); | |
416 | nport = strtoul(port, &ep, 10); | |
417 | if ( ep == port || *ep ) { | |
418 | /* Not numeric */ | |
419 | struct servent *se = getservbyname(port,"tcp"); | |
420 | if ( !se ) | |
d7530708 | 421 | die("Unknown port %s", port); |
4c505f71 PA |
422 | nport = se->s_port; |
423 | } | |
424 | ||
7841ce79 MT |
425 | if (flags & CONNECT_VERBOSE) |
426 | fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port); | |
427 | ||
ba505322 | 428 | for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) { |
4c505f71 PA |
429 | memset(&sa, 0, sizeof sa); |
430 | sa.sin_family = he->h_addrtype; | |
6573faff | 431 | sa.sin_port = htons(nport); |
c6164218 | 432 | memcpy(&sa.sin_addr, *ap, he->h_length); |
4c505f71 | 433 | |
7203a2d1 EFL |
434 | sockfd = socket(he->h_addrtype, SOCK_STREAM, 0); |
435 | if ((sockfd < 0) || | |
436 | connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) { | |
437 | strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n", | |
ba505322 AR |
438 | host, |
439 | cnt, | |
440 | inet_ntoa(*(struct in_addr *)&sa.sin_addr), | |
7203a2d1 EFL |
441 | strerror(errno)); |
442 | if (0 <= sockfd) | |
443 | close(sockfd); | |
4c505f71 PA |
444 | sockfd = -1; |
445 | continue; | |
446 | } | |
ba505322 AR |
447 | if (flags & CONNECT_VERBOSE) |
448 | fprintf(stderr, "%s ", | |
449 | inet_ntoa(*(struct in_addr *)&sa.sin_addr)); | |
4c505f71 PA |
450 | break; |
451 | } | |
452 | ||
453 | if (sockfd < 0) | |
7203a2d1 | 454 | die("unable to connect to %s:\n%s", host, error_message.buf); |
4c505f71 | 455 | |
e47a8583 EW |
456 | enable_keepalive(sockfd); |
457 | ||
7841ce79 MT |
458 | if (flags & CONNECT_VERBOSE) |
459 | fprintf(stderr, "done.\n"); | |
460 | ||
5ad312be JL |
461 | return sockfd; |
462 | } | |
463 | ||
464 | #endif /* NO_IPV6 */ | |
465 | ||
466 | ||
7841ce79 | 467 | static void git_tcp_connect(int fd[2], char *host, int flags) |
5ad312be | 468 | { |
7841ce79 | 469 | int sockfd = git_tcp_connect_sock(host, flags); |
5ad312be | 470 | |
4c505f71 | 471 | fd[0] = sockfd; |
ec587fde | 472 | fd[1] = dup(sockfd); |
4c505f71 PA |
473 | } |
474 | ||
4c505f71 | 475 | |
96f1e58f | 476 | static char *git_proxy_command; |
f8014776 | 477 | |
ef90d6d4 JS |
478 | static int git_proxy_command_options(const char *var, const char *value, |
479 | void *cb) | |
f8014776 | 480 | { |
e814bc4d | 481 | if (!strcmp(var, "core.gitproxy")) { |
c3df8568 YH |
482 | const char *for_pos; |
483 | int matchlen = -1; | |
484 | int hostlen; | |
15112c95 EFL |
485 | const char *rhost_name = cb; |
486 | int rhost_len = strlen(rhost_name); | |
c3df8568 | 487 | |
e814bc4d | 488 | if (git_proxy_command) |
f8014776 | 489 | return 0; |
c64b9ad0 JH |
490 | if (!value) |
491 | return config_error_nonbool(var); | |
e814bc4d JH |
492 | /* [core] |
493 | * ;# matches www.kernel.org as well | |
494 | * gitproxy = netcatter-1 for kernel.org | |
495 | * gitproxy = netcatter-2 for sample.xz | |
496 | * gitproxy = netcatter-default | |
497 | */ | |
c3df8568 | 498 | for_pos = strstr(value, " for "); |
e814bc4d JH |
499 | if (!for_pos) |
500 | /* matches everybody */ | |
501 | matchlen = strlen(value); | |
502 | else { | |
503 | hostlen = strlen(for_pos + 5); | |
504 | if (rhost_len < hostlen) | |
505 | matchlen = -1; | |
506 | else if (!strncmp(for_pos + 5, | |
507 | rhost_name + rhost_len - hostlen, | |
508 | hostlen) && | |
509 | ((rhost_len == hostlen) || | |
510 | rhost_name[rhost_len - hostlen -1] == '.')) | |
511 | matchlen = for_pos - value; | |
512 | else | |
513 | matchlen = -1; | |
514 | } | |
515 | if (0 <= matchlen) { | |
516 | /* core.gitproxy = none for kernel.org */ | |
a6080a0a | 517 | if (matchlen == 4 && |
e814bc4d JH |
518 | !memcmp(value, "none", 4)) |
519 | matchlen = 0; | |
182af834 | 520 | git_proxy_command = xmemdupz(value, matchlen); |
f8014776 | 521 | } |
e814bc4d | 522 | return 0; |
f8014776 PC |
523 | } |
524 | ||
ef90d6d4 | 525 | return git_default_config(var, value, cb); |
f8014776 PC |
526 | } |
527 | ||
e814bc4d | 528 | static int git_use_proxy(const char *host) |
f8014776 PC |
529 | { |
530 | git_proxy_command = getenv("GIT_PROXY_COMMAND"); | |
15112c95 | 531 | git_config(git_proxy_command_options, (void*)host); |
e814bc4d | 532 | return (git_proxy_command && *git_proxy_command); |
f8014776 PC |
533 | } |
534 | ||
5cbf8246 | 535 | static struct child_process *git_proxy_connect(int fd[2], char *host) |
f8014776 | 536 | { |
554fe20d | 537 | const char *port = STR(DEFAULT_GIT_PORT); |
5cbf8246 | 538 | struct child_process *proxy; |
f8014776 | 539 | |
72a534da | 540 | get_host_and_port(&host, &port); |
f8014776 | 541 | |
5cbf8246 | 542 | proxy = xcalloc(1, sizeof(*proxy)); |
1823bea1 JK |
543 | argv_array_push(&proxy->args, git_proxy_command); |
544 | argv_array_push(&proxy->args, host); | |
545 | argv_array_push(&proxy->args, port); | |
5cbf8246 JK |
546 | proxy->in = -1; |
547 | proxy->out = -1; | |
548 | if (start_command(proxy)) | |
1823bea1 | 549 | die("cannot start proxy %s", git_proxy_command); |
5cbf8246 JK |
550 | fd[0] = proxy->out; /* read from proxy stdout */ |
551 | fd[1] = proxy->in; /* write to proxy stdin */ | |
552 | return proxy; | |
f8014776 PC |
553 | } |
554 | ||
83b05875 | 555 | static const char *get_port_numeric(const char *p) |
2e776665 LT |
556 | { |
557 | char *end; | |
2e776665 | 558 | if (p) { |
8f148253 RS |
559 | long port = strtol(p + 1, &end, 10); |
560 | if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) { | |
83b05875 | 561 | return p; |
2e776665 LT |
562 | } |
563 | } | |
564 | ||
565 | return NULL; | |
566 | } | |
567 | ||
f7192598 | 568 | /* |
cabc3c12 JS |
569 | * Extract protocol and relevant parts from the specified connection URL. |
570 | * The caller must free() the returned strings. | |
f7192598 | 571 | */ |
cabc3c12 | 572 | static enum protocol parse_connect_url(const char *url_orig, char **ret_host, |
83b05875 | 573 | char **ret_path) |
f7192598 | 574 | { |
9d2e9420 | 575 | char *url; |
8e76bf3f | 576 | char *host, *path; |
356bece0 | 577 | char *end; |
c59ab2e5 | 578 | int separator = '/'; |
faea9ccb | 579 | enum protocol protocol = PROTO_LOCAL; |
f0b7367c | 580 | |
9d2e9420 JK |
581 | if (is_url(url_orig)) |
582 | url = url_decode(url_orig); | |
583 | else | |
584 | url = xstrdup(url_orig); | |
585 | ||
faea9ccb | 586 | host = strstr(url, "://"); |
eeefa7c9 | 587 | if (host) { |
faea9ccb AE |
588 | *host = '\0'; |
589 | protocol = get_protocol(url); | |
590 | host += 3; | |
356bece0 | 591 | } else { |
f7192598 | 592 | host = url; |
c59ab2e5 TB |
593 | if (!url_is_local_not_ssh(url)) { |
594 | protocol = PROTO_SSH; | |
595 | separator = ':'; | |
596 | } | |
356bece0 YH |
597 | } |
598 | ||
9aa5053d | 599 | /* |
83b05875 TB |
600 | * Don't do destructive transforms as protocol code does |
601 | * '[]' unwrapping in get_host_and_port() | |
9aa5053d | 602 | */ |
356bece0 YH |
603 | if (host[0] == '[') { |
604 | end = strchr(host + 1, ']'); | |
605 | if (end) { | |
356bece0 | 606 | end++; |
356bece0 YH |
607 | } else |
608 | end = host; | |
609 | } else | |
610 | end = host; | |
611 | ||
c59ab2e5 | 612 | if (protocol == PROTO_LOCAL) |
72a4f4b6 | 613 | path = end; |
c59ab2e5 TB |
614 | else if (protocol == PROTO_FILE && has_dos_drive_prefix(end)) |
615 | path = end; /* "file://$(pwd)" may be "file://C:/projects/repo" */ | |
616 | else | |
617 | path = strchr(end, separator); | |
2386d658 | 618 | |
faea9ccb AE |
619 | if (!path || !*path) |
620 | die("No path specified. See 'man git-pull' for valid url syntax"); | |
621 | ||
622 | /* | |
623 | * null-terminate hostname and point path to ~ for URL's like this: | |
624 | * ssh://host.xz/~user/repo | |
625 | */ | |
c59ab2e5 TB |
626 | |
627 | end = path; /* Need to \0 terminate host here */ | |
628 | if (separator == ':') | |
629 | path++; /* path starts after ':' */ | |
630 | if (protocol == PROTO_GIT || protocol == PROTO_SSH) { | |
faea9ccb AE |
631 | if (path[1] == '~') |
632 | path++; | |
faea9ccb AE |
633 | } |
634 | ||
c59ab2e5 TB |
635 | path = xstrdup(path); |
636 | *end = '\0'; | |
637 | ||
cabc3c12 | 638 | *ret_host = xstrdup(host); |
c59ab2e5 | 639 | *ret_path = path; |
cabc3c12 JS |
640 | free(url); |
641 | return protocol; | |
642 | } | |
643 | ||
644 | static struct child_process no_fork; | |
645 | ||
646 | /* | |
647 | * This returns a dummy child_process if the transport protocol does not | |
648 | * need fork(2), or a struct child_process object if it does. Once done, | |
649 | * finish the connection with finish_connect() with the value returned from | |
650 | * this function (it is safe to call finish_connect() with NULL to support | |
651 | * the former case). | |
652 | * | |
653 | * If it returns, the connect is successful; it just dies on errors (this | |
654 | * will hopefully be changed in a libification effort, to return NULL when | |
655 | * the connection failed). | |
656 | */ | |
657 | struct child_process *git_connect(int fd[2], const char *url, | |
658 | const char *prog, int flags) | |
659 | { | |
a2036d7e | 660 | char *hostandport, *path; |
cabc3c12 JS |
661 | struct child_process *conn = &no_fork; |
662 | enum protocol protocol; | |
cabc3c12 JS |
663 | struct strbuf cmd = STRBUF_INIT; |
664 | ||
665 | /* Without this we cannot rely on waitpid() to tell | |
666 | * what happened to our children. | |
2e776665 | 667 | */ |
cabc3c12 | 668 | signal(SIGCHLD, SIG_DFL); |
2e776665 | 669 | |
a2036d7e | 670 | protocol = parse_connect_url(url, &hostandport, &path); |
5610b7c0 TB |
671 | if (flags & CONNECT_DIAG_URL) { |
672 | printf("Diag: url=%s\n", url ? url : "NULL"); | |
673 | printf("Diag: protocol=%s\n", prot_name(protocol)); | |
a2036d7e | 674 | printf("Diag: hostandport=%s\n", hostandport ? hostandport : "NULL"); |
5610b7c0 | 675 | printf("Diag: path=%s\n", path ? path : "NULL"); |
a2036d7e TB |
676 | conn = NULL; |
677 | } else if (protocol == PROTO_GIT) { | |
5ad312be JL |
678 | /* These underlying connection commands die() if they |
679 | * cannot connect. | |
680 | */ | |
a2036d7e TB |
681 | char *target_host = xstrdup(hostandport); |
682 | if (git_use_proxy(hostandport)) | |
683 | conn = git_proxy_connect(fd, hostandport); | |
da2a95b2 | 684 | else |
a2036d7e | 685 | git_tcp_connect(fd, hostandport, flags); |
5ad312be JL |
686 | /* |
687 | * Separate original protocol components prog and path | |
73bb33a9 SP |
688 | * from extended host header with a NUL byte. |
689 | * | |
690 | * Note: Do not add any other headers here! Doing so | |
691 | * will cause older git-daemon servers to crash. | |
5ad312be JL |
692 | */ |
693 | packet_write(fd[1], | |
694 | "%s %s%chost=%s%c", | |
695 | prog, path, 0, | |
696 | target_host, 0); | |
697 | free(target_host); | |
a2036d7e TB |
698 | } else { |
699 | conn = xcalloc(1, sizeof(*conn)); | |
700 | ||
701 | strbuf_addstr(&cmd, prog); | |
702 | strbuf_addch(&cmd, ' '); | |
703 | sq_quote_buf(&cmd, path); | |
704 | ||
705 | conn->in = conn->out = -1; | |
a2036d7e TB |
706 | if (protocol == PROTO_SSH) { |
707 | const char *ssh = getenv("GIT_SSH"); | |
708 | int putty = ssh && strcasestr(ssh, "plink"); | |
709 | char *ssh_host = hostandport; | |
710 | const char *port = NULL; | |
711 | get_host_and_port(&ssh_host, &port); | |
712 | port = get_port_numeric(port); | |
713 | ||
714 | if (!ssh) ssh = "ssh"; | |
715 | ||
1823bea1 | 716 | argv_array_push(&conn->args, ssh); |
a2036d7e | 717 | if (putty && !strcasestr(ssh, "tortoiseplink")) |
1823bea1 | 718 | argv_array_push(&conn->args, "-batch"); |
a2036d7e TB |
719 | if (port) { |
720 | /* P is for PuTTY, p is for OpenSSH */ | |
1823bea1 JK |
721 | argv_array_push(&conn->args, putty ? "-P" : "-p"); |
722 | argv_array_push(&conn->args, port); | |
a2036d7e | 723 | } |
1823bea1 | 724 | argv_array_push(&conn->args, ssh_host); |
c049b61d | 725 | } else { |
a2036d7e TB |
726 | /* remove repo-local variables from the environment */ |
727 | conn->env = local_repo_env; | |
728 | conn->use_shell = 1; | |
4852f723 | 729 | } |
1823bea1 | 730 | argv_array_push(&conn->args, cmd.buf); |
f364cb88 | 731 | |
a2036d7e TB |
732 | if (start_command(conn)) |
733 | die("unable to fork"); | |
f364cb88 | 734 | |
a2036d7e TB |
735 | fd[0] = conn->out; /* read from child's stdout */ |
736 | fd[1] = conn->in; /* write to child's stdin */ | |
737 | strbuf_release(&cmd); | |
738 | } | |
739 | free(hostandport); | |
cabc3c12 | 740 | free(path); |
98158e9c | 741 | return conn; |
f7192598 LT |
742 | } |
743 | ||
7ffe853b JK |
744 | int git_connection_is_socket(struct child_process *conn) |
745 | { | |
746 | return conn == &no_fork; | |
747 | } | |
748 | ||
98158e9c | 749 | int finish_connect(struct child_process *conn) |
f7192598 | 750 | { |
f364cb88 | 751 | int code; |
7ffe853b | 752 | if (!conn || git_connection_is_socket(conn)) |
f42a5c4e FBH |
753 | return 0; |
754 | ||
f364cb88 | 755 | code = finish_command(conn); |
98158e9c | 756 | free(conn); |
f364cb88 | 757 | return code; |
f7192598 | 758 | } |