1 #include "git-compat-util.h"
6 #include "run-command.h"
10 static char *server_capabilities
;
12 static int check_ref(const char *name
, int len
, unsigned int flags
)
17 if (len
< 5 || memcmp(name
, "refs/", 5))
20 /* Skip the "refs/" part */
24 /* REF_NORMAL means that we don't want the magic fake tag refs */
25 if ((flags
& REF_NORMAL
) && check_refname_format(name
, 0))
28 /* REF_HEADS means that we want regular branch heads */
29 if ((flags
& REF_HEADS
) && !memcmp(name
, "heads/", 6))
32 /* REF_TAGS means that we want tags */
33 if ((flags
& REF_TAGS
) && !memcmp(name
, "tags/", 5))
36 /* All type bits clear means that we are ok with anything */
37 return !(flags
& ~REF_NORMAL
);
40 int check_ref_type(const struct ref
*ref
, int flags
)
42 return check_ref(ref
->name
, strlen(ref
->name
), flags
);
45 static void add_extra_have(struct extra_have_objects
*extra
, unsigned char *sha1
)
47 ALLOC_GROW(extra
->array
, extra
->nr
+ 1, extra
->alloc
);
48 hashcpy(&(extra
->array
[extra
->nr
][0]), sha1
);
52 static void die_initial_contact(int got_at_least_one_head
)
54 if (got_at_least_one_head
)
55 die("The remote end hung up upon initial contact");
57 die("Could not read from remote repository.\n\n"
58 "Please make sure you have the correct access rights\n"
59 "and the repository exists.");
63 * Read all the refs from the other end
65 struct ref
**get_remote_heads(int in
, struct ref
**list
,
67 struct extra_have_objects
*extra_have
)
69 int got_at_least_one_head
= 0;
74 unsigned char old_sha1
[20];
77 char *buffer
= packet_buffer
;
79 len
= packet_read(in
, NULL
, NULL
,
80 packet_buffer
, sizeof(packet_buffer
),
81 PACKET_READ_GENTLE_ON_EOF
|
82 PACKET_READ_CHOMP_NEWLINE
);
84 die_initial_contact(got_at_least_one_head
);
89 if (len
> 4 && !prefixcmp(buffer
, "ERR "))
90 die("remote error: %s", buffer
+ 4);
92 if (len
< 42 || get_sha1_hex(buffer
, old_sha1
) || buffer
[40] != ' ')
93 die("protocol error: expected sha/ref, got '%s'", buffer
);
96 name_len
= strlen(name
);
97 if (len
!= name_len
+ 41) {
98 free(server_capabilities
);
99 server_capabilities
= xstrdup(name
+ name_len
+ 1);
103 name_len
== 5 && !memcmp(".have", name
, 5)) {
104 add_extra_have(extra_have
, old_sha1
);
108 if (!check_ref(name
, name_len
, flags
))
110 ref
= alloc_ref(buffer
+ 41);
111 hashcpy(ref
->old_sha1
, old_sha1
);
114 got_at_least_one_head
= 1;
119 const char *parse_feature_value(const char *feature_list
, const char *feature
, int *lenp
)
126 len
= strlen(feature
);
127 while (*feature_list
) {
128 const char *found
= strstr(feature_list
, feature
);
131 if (feature_list
== found
|| isspace(found
[-1])) {
132 const char *value
= found
+ len
;
133 /* feature with no value (e.g., "thin-pack") */
134 if (!*value
|| isspace(*value
)) {
139 /* feature with a value (e.g., "agent=git/1.2.3") */
140 else if (*value
== '=') {
143 *lenp
= strcspn(value
, " \t\n");
147 * otherwise we matched a substring of another feature;
151 feature_list
= found
+ 1;
156 int parse_feature_request(const char *feature_list
, const char *feature
)
158 return !!parse_feature_value(feature_list
, feature
, NULL
);
161 const char *server_feature_value(const char *feature
, int *len
)
163 return parse_feature_value(server_capabilities
, feature
, len
);
166 int server_supports(const char *feature
)
168 return !!server_feature_value(feature
, NULL
);
177 static enum protocol
get_protocol(const char *name
)
179 if (!strcmp(name
, "ssh"))
181 if (!strcmp(name
, "git"))
183 if (!strcmp(name
, "git+ssh"))
185 if (!strcmp(name
, "ssh+git"))
187 if (!strcmp(name
, "file"))
189 die("I don't handle protocol '%s'", name
);
193 #define STR(s) STR_(s)
195 static void get_host_and_port(char **host
, const char **port
)
199 if (*host
[0] == '[') {
200 end
= strchr(*host
+ 1, ']');
209 colon
= strchr(end
, ':');
217 static void enable_keepalive(int sockfd
)
221 if (setsockopt(sockfd
, SOL_SOCKET
, SO_KEEPALIVE
, &ka
, sizeof(ka
)) < 0)
222 fprintf(stderr
, "unable to set SO_KEEPALIVE on socket: %s\n",
228 static const char *ai_name(const struct addrinfo
*ai
)
230 static char addr
[NI_MAXHOST
];
231 if (getnameinfo(ai
->ai_addr
, ai
->ai_addrlen
, addr
, sizeof(addr
), NULL
, 0,
232 NI_NUMERICHOST
) != 0)
233 strcpy(addr
, "(unknown)");
239 * Returns a connected socket() fd, or else die()s.
241 static int git_tcp_connect_sock(char *host
, int flags
)
243 struct strbuf error_message
= STRBUF_INIT
;
245 const char *port
= STR(DEFAULT_GIT_PORT
);
246 struct addrinfo hints
, *ai0
, *ai
;
250 get_host_and_port(&host
, &port
);
254 memset(&hints
, 0, sizeof(hints
));
255 hints
.ai_socktype
= SOCK_STREAM
;
256 hints
.ai_protocol
= IPPROTO_TCP
;
258 if (flags
& CONNECT_VERBOSE
)
259 fprintf(stderr
, "Looking up %s ... ", host
);
261 gai
= getaddrinfo(host
, port
, &hints
, &ai
);
263 die("Unable to look up %s (port %s) (%s)", host
, port
, gai_strerror(gai
));
265 if (flags
& CONNECT_VERBOSE
)
266 fprintf(stderr
, "done.\nConnecting to %s (port %s) ... ", host
, port
);
268 for (ai0
= ai
; ai
; ai
= ai
->ai_next
, cnt
++) {
269 sockfd
= socket(ai
->ai_family
,
270 ai
->ai_socktype
, ai
->ai_protocol
);
272 (connect(sockfd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0)) {
273 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
274 host
, cnt
, ai_name(ai
), strerror(errno
));
280 if (flags
& CONNECT_VERBOSE
)
281 fprintf(stderr
, "%s ", ai_name(ai
));
288 die("unable to connect to %s:\n%s", host
, error_message
.buf
);
290 enable_keepalive(sockfd
);
292 if (flags
& CONNECT_VERBOSE
)
293 fprintf(stderr
, "done.\n");
295 strbuf_release(&error_message
);
303 * Returns a connected socket() fd, or else die()s.
305 static int git_tcp_connect_sock(char *host
, int flags
)
307 struct strbuf error_message
= STRBUF_INIT
;
309 const char *port
= STR(DEFAULT_GIT_PORT
);
312 struct sockaddr_in sa
;
317 get_host_and_port(&host
, &port
);
319 if (flags
& CONNECT_VERBOSE
)
320 fprintf(stderr
, "Looking up %s ... ", host
);
322 he
= gethostbyname(host
);
324 die("Unable to look up %s (%s)", host
, hstrerror(h_errno
));
325 nport
= strtoul(port
, &ep
, 10);
326 if ( ep
== port
|| *ep
) {
328 struct servent
*se
= getservbyname(port
,"tcp");
330 die("Unknown port %s", port
);
334 if (flags
& CONNECT_VERBOSE
)
335 fprintf(stderr
, "done.\nConnecting to %s (port %s) ... ", host
, port
);
337 for (cnt
= 0, ap
= he
->h_addr_list
; *ap
; ap
++, cnt
++) {
338 memset(&sa
, 0, sizeof sa
);
339 sa
.sin_family
= he
->h_addrtype
;
340 sa
.sin_port
= htons(nport
);
341 memcpy(&sa
.sin_addr
, *ap
, he
->h_length
);
343 sockfd
= socket(he
->h_addrtype
, SOCK_STREAM
, 0);
345 connect(sockfd
, (struct sockaddr
*)&sa
, sizeof sa
) < 0) {
346 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
349 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
),
356 if (flags
& CONNECT_VERBOSE
)
357 fprintf(stderr
, "%s ",
358 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
));
363 die("unable to connect to %s:\n%s", host
, error_message
.buf
);
365 enable_keepalive(sockfd
);
367 if (flags
& CONNECT_VERBOSE
)
368 fprintf(stderr
, "done.\n");
376 static void git_tcp_connect(int fd
[2], char *host
, int flags
)
378 int sockfd
= git_tcp_connect_sock(host
, flags
);
385 static char *git_proxy_command
;
387 static int git_proxy_command_options(const char *var
, const char *value
,
390 if (!strcmp(var
, "core.gitproxy")) {
394 const char *rhost_name
= cb
;
395 int rhost_len
= strlen(rhost_name
);
397 if (git_proxy_command
)
400 return config_error_nonbool(var
);
402 * ;# matches www.kernel.org as well
403 * gitproxy = netcatter-1 for kernel.org
404 * gitproxy = netcatter-2 for sample.xz
405 * gitproxy = netcatter-default
407 for_pos
= strstr(value
, " for ");
409 /* matches everybody */
410 matchlen
= strlen(value
);
412 hostlen
= strlen(for_pos
+ 5);
413 if (rhost_len
< hostlen
)
415 else if (!strncmp(for_pos
+ 5,
416 rhost_name
+ rhost_len
- hostlen
,
418 ((rhost_len
== hostlen
) ||
419 rhost_name
[rhost_len
- hostlen
-1] == '.'))
420 matchlen
= for_pos
- value
;
425 /* core.gitproxy = none for kernel.org */
427 !memcmp(value
, "none", 4))
429 git_proxy_command
= xmemdupz(value
, matchlen
);
434 return git_default_config(var
, value
, cb
);
437 static int git_use_proxy(const char *host
)
439 git_proxy_command
= getenv("GIT_PROXY_COMMAND");
440 git_config(git_proxy_command_options
, (void*)host
);
441 return (git_proxy_command
&& *git_proxy_command
);
444 static struct child_process
*git_proxy_connect(int fd
[2], char *host
)
446 const char *port
= STR(DEFAULT_GIT_PORT
);
448 struct child_process
*proxy
;
450 get_host_and_port(&host
, &port
);
452 argv
= xmalloc(sizeof(*argv
) * 4);
453 argv
[0] = git_proxy_command
;
457 proxy
= xcalloc(1, sizeof(*proxy
));
461 if (start_command(proxy
))
462 die("cannot start proxy %s", argv
[0]);
463 fd
[0] = proxy
->out
; /* read from proxy stdout */
464 fd
[1] = proxy
->in
; /* write to proxy stdin */
468 #define MAX_CMD_LEN 1024
470 static char *get_port(char *host
)
473 char *p
= strchr(host
, ':');
476 long port
= strtol(p
+ 1, &end
, 10);
477 if (end
!= p
+ 1 && *end
== '\0' && 0 <= port
&& port
< 65536) {
486 static struct child_process no_fork
;
489 * This returns a dummy child_process if the transport protocol does not
490 * need fork(2), or a struct child_process object if it does. Once done,
491 * finish the connection with finish_connect() with the value returned from
492 * this function (it is safe to call finish_connect() with NULL to support
495 * If it returns, the connect is successful; it just dies on errors (this
496 * will hopefully be changed in a libification effort, to return NULL when
497 * the connection failed).
499 struct child_process
*git_connect(int fd
[2], const char *url_orig
,
500 const char *prog
, int flags
)
506 struct child_process
*conn
= &no_fork
;
507 enum protocol protocol
= PROTO_LOCAL
;
513 /* Without this we cannot rely on waitpid() to tell
514 * what happened to our children.
516 signal(SIGCHLD
, SIG_DFL
);
518 if (is_url(url_orig
))
519 url
= url_decode(url_orig
);
521 url
= xstrdup(url_orig
);
523 host
= strstr(url
, "://");
526 protocol
= get_protocol(url
);
535 * Don't do destructive transforms with git:// as that
536 * protocol code does '[]' unwrapping of its own.
538 if (host
[0] == '[') {
539 end
= strchr(host
+ 1, ']');
541 if (protocol
!= PROTO_GIT
) {
551 path
= strchr(end
, c
);
552 if (path
&& !has_dos_drive_prefix(end
)) {
554 protocol
= PROTO_SSH
;
561 die("No path specified. See 'man git-pull' for valid url syntax");
564 * null-terminate hostname and point path to ~ for URL's like this:
565 * ssh://host.xz/~user/repo
567 if (protocol
!= PROTO_LOCAL
&& host
!= url
) {
580 * Add support for ssh port: ssh://host.xy:<port>/...
582 if (protocol
== PROTO_SSH
&& host
!= url
)
583 port
= get_port(end
);
585 if (protocol
== PROTO_GIT
) {
586 /* These underlying connection commands die() if they
589 char *target_host
= xstrdup(host
);
590 if (git_use_proxy(host
))
591 conn
= git_proxy_connect(fd
, host
);
593 git_tcp_connect(fd
, host
, flags
);
595 * Separate original protocol components prog and path
596 * from extended host header with a NUL byte.
598 * Note: Do not add any other headers here! Doing so
599 * will cause older git-daemon servers to crash.
612 conn
= xcalloc(1, sizeof(*conn
));
614 strbuf_init(&cmd
, MAX_CMD_LEN
);
615 strbuf_addstr(&cmd
, prog
);
616 strbuf_addch(&cmd
, ' ');
617 sq_quote_buf(&cmd
, path
);
618 if (cmd
.len
>= MAX_CMD_LEN
)
619 die("command line too long");
621 conn
->in
= conn
->out
= -1;
622 conn
->argv
= arg
= xcalloc(7, sizeof(*arg
));
623 if (protocol
== PROTO_SSH
) {
624 const char *ssh
= getenv("GIT_SSH");
625 int putty
= ssh
&& strcasestr(ssh
, "plink");
626 if (!ssh
) ssh
= "ssh";
629 if (putty
&& !strcasestr(ssh
, "tortoiseplink"))
632 /* P is for PuTTY, p is for OpenSSH */
633 *arg
++ = putty
? "-P" : "-p";
639 /* remove repo-local variables from the environment */
640 conn
->env
= local_repo_env
;
646 if (start_command(conn
))
647 die("unable to fork");
649 fd
[0] = conn
->out
; /* read from child's stdout */
650 fd
[1] = conn
->in
; /* write to child's stdin */
651 strbuf_release(&cmd
);
658 int git_connection_is_socket(struct child_process
*conn
)
660 return conn
== &no_fork
;
663 int finish_connect(struct child_process
*conn
)
666 if (!conn
|| git_connection_is_socket(conn
))
669 code
= finish_command(conn
);