1 #include "git-compat-util.h"
7 #include "run-command.h"
11 #include "string-list.h"
12 #include "oid-array.h"
13 #include "transport.h"
19 static char *server_capabilities_v1
;
20 static struct argv_array server_capabilities_v2
= ARGV_ARRAY_INIT
;
21 static const char *next_server_feature_value(const char *feature
, int *len
, int *offset
);
23 static int check_ref(const char *name
, unsigned int flags
)
28 if (!skip_prefix(name
, "refs/", &name
))
31 /* REF_NORMAL means that we don't want the magic fake tag refs */
32 if ((flags
& REF_NORMAL
) && check_refname_format(name
, 0))
35 /* REF_HEADS means that we want regular branch heads */
36 if ((flags
& REF_HEADS
) && starts_with(name
, "heads/"))
39 /* REF_TAGS means that we want tags */
40 if ((flags
& REF_TAGS
) && starts_with(name
, "tags/"))
43 /* All type bits clear means that we are ok with anything */
44 return !(flags
& ~REF_NORMAL
);
47 int check_ref_type(const struct ref
*ref
, int flags
)
49 return check_ref(ref
->name
, flags
);
52 static NORETURN
void die_initial_contact(int unexpected
)
55 * A hang-up after seeing some response from the other end
56 * means that it is unexpected, as we know the other end is
57 * willing to talk to us. A hang-up before seeing any
58 * response does not necessarily mean an ACL problem, though.
61 die(_("the remote end hung up upon initial contact"));
63 die(_("Could not read from remote repository.\n\n"
64 "Please make sure you have the correct access rights\n"
65 "and the repository exists."));
68 /* Checks if the server supports the capability 'c' */
69 int server_supports_v2(const char *c
, int die_on_error
)
73 for (i
= 0; i
< server_capabilities_v2
.argc
; i
++) {
75 if (skip_prefix(server_capabilities_v2
.argv
[i
], c
, &out
) &&
76 (!*out
|| *out
== '='))
81 die(_("server doesn't support '%s'"), c
);
86 int server_feature_v2(const char *c
, const char **v
)
90 for (i
= 0; i
< server_capabilities_v2
.argc
; i
++) {
92 if (skip_prefix(server_capabilities_v2
.argv
[i
], c
, &out
) &&
101 int server_supports_feature(const char *c
, const char *feature
,
106 for (i
= 0; i
< server_capabilities_v2
.argc
; i
++) {
108 if (skip_prefix(server_capabilities_v2
.argv
[i
], c
, &out
) &&
109 (!*out
|| *(out
++) == '=')) {
110 if (parse_feature_request(out
, feature
))
118 die(_("server doesn't support feature '%s'"), feature
);
123 static void process_capabilities_v2(struct packet_reader
*reader
)
125 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
)
126 argv_array_push(&server_capabilities_v2
, reader
->line
);
128 if (reader
->status
!= PACKET_READ_FLUSH
)
129 die(_("expected flush after capabilities"));
132 enum protocol_version
discover_version(struct packet_reader
*reader
)
134 enum protocol_version version
= protocol_unknown_version
;
137 * Peek the first line of the server's response to
138 * determine the protocol version the server is speaking.
140 switch (packet_reader_peek(reader
)) {
141 case PACKET_READ_EOF
:
142 die_initial_contact(0);
143 case PACKET_READ_FLUSH
:
144 case PACKET_READ_DELIM
:
145 version
= protocol_v0
;
147 case PACKET_READ_NORMAL
:
148 version
= determine_protocol_version_client(reader
->line
);
154 process_capabilities_v2(reader
);
157 /* Read the peeked version line */
158 packet_reader_read(reader
);
162 case protocol_unknown_version
:
163 BUG("unknown protocol version");
169 static void parse_one_symref_info(struct string_list
*symref
, const char *val
, int len
)
172 struct string_list_item
*item
;
175 return; /* just "symref" */
176 /* e.g. "symref=HEAD:refs/heads/master" */
177 sym
= xmemdupz(val
, len
);
178 target
= strchr(sym
, ':');
180 /* just "symref=something" */
183 if (check_refname_format(sym
, REFNAME_ALLOW_ONELEVEL
) ||
184 check_refname_format(target
, REFNAME_ALLOW_ONELEVEL
))
185 /* "symref=bogus:pair */
187 item
= string_list_append_nodup(symref
, sym
);
195 static void annotate_refs_with_symref_info(struct ref
*ref
)
197 struct string_list symref
= STRING_LIST_INIT_DUP
;
204 val
= next_server_feature_value("symref", &len
, &offset
);
207 parse_one_symref_info(&symref
, val
, len
);
209 string_list_sort(&symref
);
211 for (; ref
; ref
= ref
->next
) {
212 struct string_list_item
*item
;
213 item
= string_list_lookup(&symref
, ref
->name
);
216 ref
->symref
= xstrdup((char *)item
->util
);
218 string_list_clear(&symref
, 0);
221 static void process_capabilities(struct packet_reader
*reader
, int *linelen
)
223 const char *feat_val
;
225 const char *line
= reader
->line
;
226 int nul_location
= strlen(line
);
227 if (nul_location
== *linelen
)
229 server_capabilities_v1
= xstrdup(line
+ nul_location
+ 1);
230 *linelen
= nul_location
;
232 feat_val
= server_feature_value("object-format", &feat_len
);
234 char *hash_name
= xstrndup(feat_val
, feat_len
);
235 int hash_algo
= hash_algo_by_name(hash_name
);
236 if (hash_algo
!= GIT_HASH_UNKNOWN
)
237 reader
->hash_algo
= &hash_algos
[hash_algo
];
240 reader
->hash_algo
= &hash_algos
[GIT_HASH_SHA1
];
244 static int process_dummy_ref(const struct packet_reader
*reader
)
246 const char *line
= reader
->line
;
247 struct object_id oid
;
250 if (parse_oid_hex_algop(line
, &oid
, &name
, reader
->hash_algo
))
256 return oideq(&null_oid
, &oid
) && !strcmp(name
, "capabilities^{}");
259 static void check_no_capabilities(const char *line
, int len
)
261 if (strlen(line
) != len
)
262 warning(_("ignoring capabilities after first line '%s'"),
263 line
+ strlen(line
));
266 static int process_ref(const struct packet_reader
*reader
, int len
,
267 struct ref
***list
, unsigned int flags
,
268 struct oid_array
*extra_have
)
270 const char *line
= reader
->line
;
271 struct object_id old_oid
;
274 if (parse_oid_hex_algop(line
, &old_oid
, &name
, reader
->hash_algo
))
280 if (extra_have
&& !strcmp(name
, ".have")) {
281 oid_array_append(extra_have
, &old_oid
);
282 } else if (!strcmp(name
, "capabilities^{}")) {
283 die(_("protocol error: unexpected capabilities^{}"));
284 } else if (check_ref(name
, flags
)) {
285 struct ref
*ref
= alloc_ref(name
);
286 memcpy(ref
->old_oid
.hash
, old_oid
.hash
, reader
->hash_algo
->rawsz
);
290 check_no_capabilities(line
, len
);
294 static int process_shallow(const struct packet_reader
*reader
, int len
,
295 struct oid_array
*shallow_points
)
297 const char *line
= reader
->line
;
299 struct object_id old_oid
;
301 if (!skip_prefix(line
, "shallow ", &arg
))
304 if (get_oid_hex_algop(arg
, &old_oid
, reader
->hash_algo
))
305 die(_("protocol error: expected shallow sha-1, got '%s'"), arg
);
307 die(_("repository on the other end cannot be shallow"));
308 oid_array_append(shallow_points
, &old_oid
);
309 check_no_capabilities(line
, len
);
313 enum get_remote_heads_state
{
314 EXPECTING_FIRST_REF
= 0,
321 * Read all the refs from the other end
323 struct ref
**get_remote_heads(struct packet_reader
*reader
,
324 struct ref
**list
, unsigned int flags
,
325 struct oid_array
*extra_have
,
326 struct oid_array
*shallow_points
)
328 struct ref
**orig_list
= list
;
330 enum get_remote_heads_state state
= EXPECTING_FIRST_REF
;
334 while (state
!= EXPECTING_DONE
) {
335 switch (packet_reader_read(reader
)) {
336 case PACKET_READ_EOF
:
337 die_initial_contact(1);
338 case PACKET_READ_NORMAL
:
339 len
= reader
->pktlen
;
341 case PACKET_READ_FLUSH
:
342 state
= EXPECTING_DONE
;
344 case PACKET_READ_DELIM
:
345 die(_("invalid packet"));
349 case EXPECTING_FIRST_REF
:
350 process_capabilities(reader
, &len
);
351 if (process_dummy_ref(reader
)) {
352 state
= EXPECTING_SHALLOW
;
355 state
= EXPECTING_REF
;
358 if (process_ref(reader
, len
, &list
, flags
, extra_have
))
360 state
= EXPECTING_SHALLOW
;
362 case EXPECTING_SHALLOW
:
363 if (process_shallow(reader
, len
, shallow_points
))
365 die(_("protocol error: unexpected '%s'"), reader
->line
);
371 annotate_refs_with_symref_info(*orig_list
);
376 /* Returns 1 when a valid ref has been added to `list`, 0 otherwise */
377 static int process_ref_v2(struct packet_reader
*reader
, struct ref
***list
)
381 struct object_id old_oid
;
383 struct string_list line_sections
= STRING_LIST_INIT_DUP
;
385 const char *line
= reader
->line
;
388 * Ref lines have a number of fields which are space deliminated. The
389 * first field is the OID of the ref. The second field is the ref
390 * name. Subsequent fields (symref-target and peeled) are optional and
391 * don't have a particular order.
393 if (string_list_split(&line_sections
, line
, ' ', -1) < 2) {
398 if (parse_oid_hex(line_sections
.items
[i
++].string
, &old_oid
, &end
) ||
404 ref
= alloc_ref(line_sections
.items
[i
++].string
);
406 oidcpy(&ref
->old_oid
, &old_oid
);
410 for (; i
< line_sections
.nr
; i
++) {
411 const char *arg
= line_sections
.items
[i
].string
;
412 if (skip_prefix(arg
, "symref-target:", &arg
))
413 ref
->symref
= xstrdup(arg
);
415 if (skip_prefix(arg
, "peeled:", &arg
)) {
416 struct object_id peeled_oid
;
419 if (parse_oid_hex(arg
, &peeled_oid
, &end
) || *end
) {
424 peeled_name
= xstrfmt("%s^{}", ref
->name
);
425 peeled
= alloc_ref(peeled_name
);
427 oidcpy(&peeled
->old_oid
, &peeled_oid
);
429 *list
= &peeled
->next
;
436 string_list_clear(&line_sections
, 0);
440 struct ref
**get_remote_refs(int fd_out
, struct packet_reader
*reader
,
441 struct ref
**list
, int for_push
,
442 const struct argv_array
*ref_prefixes
,
443 const struct string_list
*server_options
)
448 if (server_supports_v2("ls-refs", 1))
449 packet_write_fmt(fd_out
, "command=ls-refs\n");
451 if (server_supports_v2("agent", 0))
452 packet_write_fmt(fd_out
, "agent=%s", git_user_agent_sanitized());
454 if (server_options
&& server_options
->nr
&&
455 server_supports_v2("server-option", 1))
456 for (i
= 0; i
< server_options
->nr
; i
++)
457 packet_write_fmt(fd_out
, "server-option=%s",
458 server_options
->items
[i
].string
);
460 packet_delim(fd_out
);
461 /* When pushing we don't want to request the peeled tags */
463 packet_write_fmt(fd_out
, "peel\n");
464 packet_write_fmt(fd_out
, "symrefs\n");
465 for (i
= 0; ref_prefixes
&& i
< ref_prefixes
->argc
; i
++) {
466 packet_write_fmt(fd_out
, "ref-prefix %s\n",
467 ref_prefixes
->argv
[i
]);
469 packet_flush(fd_out
);
471 /* Process response from server */
472 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
473 if (!process_ref_v2(reader
, &list
))
474 die(_("invalid ls-refs response: %s"), reader
->line
);
477 if (reader
->status
!= PACKET_READ_FLUSH
)
478 die(_("expected flush after ref listing"));
483 const char *parse_feature_value(const char *feature_list
, const char *feature
, int *lenp
, int *offset
)
490 len
= strlen(feature
);
492 feature_list
+= *offset
;
493 while (*feature_list
) {
494 const char *found
= strstr(feature_list
, feature
);
497 if (feature_list
== found
|| isspace(found
[-1])) {
498 const char *value
= found
+ len
;
499 /* feature with no value (e.g., "thin-pack") */
500 if (!*value
|| isspace(*value
)) {
505 /* feature with a value (e.g., "agent=git/1.2.3") */
506 else if (*value
== '=') {
510 end
= strcspn(value
, " \t\n");
514 *offset
= value
+ end
- feature_list
;
518 * otherwise we matched a substring of another feature;
522 feature_list
= found
+ 1;
527 int server_supports_hash(const char *desired
, int *feature_supported
)
533 hash
= next_server_feature_value("object-format", &len
, &offset
);
534 if (feature_supported
)
535 *feature_supported
= !!hash
;
537 hash
= hash_algos
[GIT_HASH_SHA1
].name
;
541 if (!xstrncmpz(desired
, hash
, len
))
544 hash
= next_server_feature_value("object-format", &len
, &offset
);
549 int parse_feature_request(const char *feature_list
, const char *feature
)
551 return !!parse_feature_value(feature_list
, feature
, NULL
, NULL
);
554 static const char *next_server_feature_value(const char *feature
, int *len
, int *offset
)
556 return parse_feature_value(server_capabilities_v1
, feature
, len
, offset
);
559 const char *server_feature_value(const char *feature
, int *len
)
561 return parse_feature_value(server_capabilities_v1
, feature
, len
, NULL
);
564 int server_supports(const char *feature
)
566 return !!server_feature_value(feature
, NULL
);
576 int url_is_local_not_ssh(const char *url
)
578 const char *colon
= strchr(url
, ':');
579 const char *slash
= strchr(url
, '/');
580 return !colon
|| (slash
&& slash
< colon
) ||
581 (has_dos_drive_prefix(url
) && is_valid_path(url
));
584 static const char *prot_name(enum protocol protocol
)
595 return "unknown protocol";
599 static enum protocol
get_protocol(const char *name
)
601 if (!strcmp(name
, "ssh"))
603 if (!strcmp(name
, "git"))
605 if (!strcmp(name
, "git+ssh")) /* deprecated - do not use */
607 if (!strcmp(name
, "ssh+git")) /* deprecated - do not use */
609 if (!strcmp(name
, "file"))
611 die(_("protocol '%s' is not supported"), name
);
614 static char *host_end(char **hoststart
, int removebrackets
)
616 char *host
= *hoststart
;
618 char *start
= strstr(host
, "@[");
620 start
++; /* Jump over '@' */
623 if (start
[0] == '[') {
624 end
= strchr(start
+ 1, ']');
626 if (removebrackets
) {
628 memmove(start
, start
+ 1, end
- start
);
639 #define STR(s) STR_(s)
641 static void get_host_and_port(char **host
, const char **port
)
644 end
= host_end(host
, 1);
645 colon
= strchr(end
, ':');
647 long portnr
= strtol(colon
+ 1, &end
, 10);
648 if (end
!= colon
+ 1 && *end
== '\0' && 0 <= portnr
&& portnr
< 65536) {
651 } else if (!colon
[1]) {
657 static void enable_keepalive(int sockfd
)
661 if (setsockopt(sockfd
, SOL_SOCKET
, SO_KEEPALIVE
, &ka
, sizeof(ka
)) < 0)
662 error_errno(_("unable to set SO_KEEPALIVE on socket"));
667 static const char *ai_name(const struct addrinfo
*ai
)
669 static char addr
[NI_MAXHOST
];
670 if (getnameinfo(ai
->ai_addr
, ai
->ai_addrlen
, addr
, sizeof(addr
), NULL
, 0,
671 NI_NUMERICHOST
) != 0)
672 xsnprintf(addr
, sizeof(addr
), "(unknown)");
678 * Returns a connected socket() fd, or else die()s.
680 static int git_tcp_connect_sock(char *host
, int flags
)
682 struct strbuf error_message
= STRBUF_INIT
;
684 const char *port
= STR(DEFAULT_GIT_PORT
);
685 struct addrinfo hints
, *ai0
, *ai
;
689 get_host_and_port(&host
, &port
);
693 memset(&hints
, 0, sizeof(hints
));
694 if (flags
& CONNECT_IPV4
)
695 hints
.ai_family
= AF_INET
;
696 else if (flags
& CONNECT_IPV6
)
697 hints
.ai_family
= AF_INET6
;
698 hints
.ai_socktype
= SOCK_STREAM
;
699 hints
.ai_protocol
= IPPROTO_TCP
;
701 if (flags
& CONNECT_VERBOSE
)
702 fprintf(stderr
, _("Looking up %s ... "), host
);
704 gai
= getaddrinfo(host
, port
, &hints
, &ai
);
706 die(_("unable to look up %s (port %s) (%s)"), host
, port
, gai_strerror(gai
));
708 if (flags
& CONNECT_VERBOSE
)
709 /* TRANSLATORS: this is the end of "Looking up %s ... " */
710 fprintf(stderr
, _("done.\nConnecting to %s (port %s) ... "), host
, port
);
712 for (ai0
= ai
; ai
; ai
= ai
->ai_next
, cnt
++) {
713 sockfd
= socket(ai
->ai_family
,
714 ai
->ai_socktype
, ai
->ai_protocol
);
716 (connect(sockfd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0)) {
717 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
718 host
, cnt
, ai_name(ai
), strerror(errno
));
724 if (flags
& CONNECT_VERBOSE
)
725 fprintf(stderr
, "%s ", ai_name(ai
));
732 die(_("unable to connect to %s:\n%s"), host
, error_message
.buf
);
734 enable_keepalive(sockfd
);
736 if (flags
& CONNECT_VERBOSE
)
737 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
738 fprintf_ln(stderr
, _("done."));
740 strbuf_release(&error_message
);
748 * Returns a connected socket() fd, or else die()s.
750 static int git_tcp_connect_sock(char *host
, int flags
)
752 struct strbuf error_message
= STRBUF_INIT
;
754 const char *port
= STR(DEFAULT_GIT_PORT
);
757 struct sockaddr_in sa
;
762 get_host_and_port(&host
, &port
);
764 if (flags
& CONNECT_VERBOSE
)
765 fprintf(stderr
, _("Looking up %s ... "), host
);
767 he
= gethostbyname(host
);
769 die(_("unable to look up %s (%s)"), host
, hstrerror(h_errno
));
770 nport
= strtoul(port
, &ep
, 10);
771 if ( ep
== port
|| *ep
) {
773 struct servent
*se
= getservbyname(port
,"tcp");
775 die(_("unknown port %s"), port
);
779 if (flags
& CONNECT_VERBOSE
)
780 /* TRANSLATORS: this is the end of "Looking up %s ... " */
781 fprintf(stderr
, _("done.\nConnecting to %s (port %s) ... "), host
, port
);
783 for (cnt
= 0, ap
= he
->h_addr_list
; *ap
; ap
++, cnt
++) {
784 memset(&sa
, 0, sizeof sa
);
785 sa
.sin_family
= he
->h_addrtype
;
786 sa
.sin_port
= htons(nport
);
787 memcpy(&sa
.sin_addr
, *ap
, he
->h_length
);
789 sockfd
= socket(he
->h_addrtype
, SOCK_STREAM
, 0);
791 connect(sockfd
, (struct sockaddr
*)&sa
, sizeof sa
) < 0) {
792 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
795 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
),
802 if (flags
& CONNECT_VERBOSE
)
803 fprintf(stderr
, "%s ",
804 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
));
809 die(_("unable to connect to %s:\n%s"), host
, error_message
.buf
);
811 enable_keepalive(sockfd
);
813 if (flags
& CONNECT_VERBOSE
)
814 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
815 fprintf_ln(stderr
, _("done."));
824 * Dummy child_process returned by git_connect() if the transport protocol
825 * does not need fork(2).
827 static struct child_process no_fork
= CHILD_PROCESS_INIT
;
829 int git_connection_is_socket(struct child_process
*conn
)
831 return conn
== &no_fork
;
834 static struct child_process
*git_tcp_connect(int fd
[2], char *host
, int flags
)
836 int sockfd
= git_tcp_connect_sock(host
, flags
);
845 static char *git_proxy_command
;
847 static int git_proxy_command_options(const char *var
, const char *value
,
850 if (!strcmp(var
, "core.gitproxy")) {
854 const char *rhost_name
= cb
;
855 int rhost_len
= strlen(rhost_name
);
857 if (git_proxy_command
)
860 return config_error_nonbool(var
);
862 * ;# matches www.kernel.org as well
863 * gitproxy = netcatter-1 for kernel.org
864 * gitproxy = netcatter-2 for sample.xz
865 * gitproxy = netcatter-default
867 for_pos
= strstr(value
, " for ");
869 /* matches everybody */
870 matchlen
= strlen(value
);
872 hostlen
= strlen(for_pos
+ 5);
873 if (rhost_len
< hostlen
)
875 else if (!strncmp(for_pos
+ 5,
876 rhost_name
+ rhost_len
- hostlen
,
878 ((rhost_len
== hostlen
) ||
879 rhost_name
[rhost_len
- hostlen
-1] == '.'))
880 matchlen
= for_pos
- value
;
885 /* core.gitproxy = none for kernel.org */
887 !memcmp(value
, "none", 4))
889 git_proxy_command
= xmemdupz(value
, matchlen
);
894 return git_default_config(var
, value
, cb
);
897 static int git_use_proxy(const char *host
)
899 git_proxy_command
= getenv("GIT_PROXY_COMMAND");
900 git_config(git_proxy_command_options
, (void*)host
);
901 return (git_proxy_command
&& *git_proxy_command
);
904 static struct child_process
*git_proxy_connect(int fd
[2], char *host
)
906 const char *port
= STR(DEFAULT_GIT_PORT
);
907 struct child_process
*proxy
;
909 get_host_and_port(&host
, &port
);
911 if (looks_like_command_line_option(host
))
912 die(_("strange hostname '%s' blocked"), host
);
913 if (looks_like_command_line_option(port
))
914 die(_("strange port '%s' blocked"), port
);
916 proxy
= xmalloc(sizeof(*proxy
));
917 child_process_init(proxy
);
918 argv_array_push(&proxy
->args
, git_proxy_command
);
919 argv_array_push(&proxy
->args
, host
);
920 argv_array_push(&proxy
->args
, port
);
923 if (start_command(proxy
))
924 die(_("cannot start proxy %s"), git_proxy_command
);
925 fd
[0] = proxy
->out
; /* read from proxy stdout */
926 fd
[1] = proxy
->in
; /* write to proxy stdin */
930 static char *get_port(char *host
)
933 char *p
= strchr(host
, ':');
936 long port
= strtol(p
+ 1, &end
, 10);
937 if (end
!= p
+ 1 && *end
== '\0' && 0 <= port
&& port
< 65536) {
947 * Extract protocol and relevant parts from the specified connection URL.
948 * The caller must free() the returned strings.
950 static enum protocol
parse_connect_url(const char *url_orig
, char **ret_host
,
957 enum protocol protocol
= PROTO_LOCAL
;
959 if (is_url(url_orig
))
960 url
= url_decode(url_orig
);
962 url
= xstrdup(url_orig
);
964 host
= strstr(url
, "://");
967 protocol
= get_protocol(url
);
971 if (!url_is_local_not_ssh(url
)) {
972 protocol
= PROTO_SSH
;
978 * Don't do destructive transforms as protocol code does
979 * '[]' unwrapping in get_host_and_port()
981 end
= host_end(&host
, 0);
983 if (protocol
== PROTO_LOCAL
)
985 else if (protocol
== PROTO_FILE
&& *host
!= '/' &&
986 !has_dos_drive_prefix(host
) &&
987 offset_1st_component(host
- 2) > 1)
988 path
= host
- 2; /* include the leading "//" */
989 else if (protocol
== PROTO_FILE
&& has_dos_drive_prefix(end
))
990 path
= end
; /* "file://$(pwd)" may be "file://C:/projects/repo" */
992 path
= strchr(end
, separator
);
995 die(_("no path specified; see 'git help pull' for valid url syntax"));
998 * null-terminate hostname and point path to ~ for URL's like this:
999 * ssh://host.xz/~user/repo
1002 end
= path
; /* Need to \0 terminate host here */
1003 if (separator
== ':')
1004 path
++; /* path starts after ':' */
1005 if (protocol
== PROTO_GIT
|| protocol
== PROTO_SSH
) {
1010 path
= xstrdup(path
);
1013 *ret_host
= xstrdup(host
);
1019 static const char *get_ssh_command(void)
1023 if ((ssh
= getenv("GIT_SSH_COMMAND")))
1026 if (!git_config_get_string_const("core.sshcommand", &ssh
))
1038 VARIANT_TORTOISEPLINK
,
1041 static void override_ssh_variant(enum ssh_variant
*ssh_variant
)
1043 const char *variant
= getenv("GIT_SSH_VARIANT");
1045 if (!variant
&& git_config_get_string_const("ssh.variant", &variant
))
1048 if (!strcmp(variant
, "auto"))
1049 *ssh_variant
= VARIANT_AUTO
;
1050 else if (!strcmp(variant
, "plink"))
1051 *ssh_variant
= VARIANT_PLINK
;
1052 else if (!strcmp(variant
, "putty"))
1053 *ssh_variant
= VARIANT_PUTTY
;
1054 else if (!strcmp(variant
, "tortoiseplink"))
1055 *ssh_variant
= VARIANT_TORTOISEPLINK
;
1056 else if (!strcmp(variant
, "simple"))
1057 *ssh_variant
= VARIANT_SIMPLE
;
1059 *ssh_variant
= VARIANT_SSH
;
1062 static enum ssh_variant
determine_ssh_variant(const char *ssh_command
,
1065 enum ssh_variant ssh_variant
= VARIANT_AUTO
;
1066 const char *variant
;
1069 override_ssh_variant(&ssh_variant
);
1071 if (ssh_variant
!= VARIANT_AUTO
)
1075 p
= xstrdup(ssh_command
);
1076 variant
= basename(p
);
1078 const char **ssh_argv
;
1080 p
= xstrdup(ssh_command
);
1081 if (split_cmdline(p
, &ssh_argv
) > 0) {
1082 variant
= basename((char *)ssh_argv
[0]);
1084 * At this point, variant points into the buffer
1085 * referenced by p, hence we do not need ssh_argv
1095 if (!strcasecmp(variant
, "ssh") ||
1096 !strcasecmp(variant
, "ssh.exe"))
1097 ssh_variant
= VARIANT_SSH
;
1098 else if (!strcasecmp(variant
, "plink") ||
1099 !strcasecmp(variant
, "plink.exe"))
1100 ssh_variant
= VARIANT_PLINK
;
1101 else if (!strcasecmp(variant
, "tortoiseplink") ||
1102 !strcasecmp(variant
, "tortoiseplink.exe"))
1103 ssh_variant
= VARIANT_TORTOISEPLINK
;
1110 * Open a connection using Git's native protocol.
1112 * The caller is responsible for freeing hostandport, but this function may
1113 * modify it (for example, to truncate it to remove the port part).
1115 static struct child_process
*git_connect_git(int fd
[2], char *hostandport
,
1116 const char *path
, const char *prog
,
1117 enum protocol_version version
,
1120 struct child_process
*conn
;
1121 struct strbuf request
= STRBUF_INIT
;
1123 * Set up virtual host information based on where we will
1124 * connect, unless the user has overridden us in
1127 char *target_host
= getenv("GIT_OVERRIDE_VIRTUAL_HOST");
1129 target_host
= xstrdup(target_host
);
1131 target_host
= xstrdup(hostandport
);
1133 transport_check_allowed("git");
1136 * These underlying connection commands die() if they
1139 if (git_use_proxy(hostandport
))
1140 conn
= git_proxy_connect(fd
, hostandport
);
1142 conn
= git_tcp_connect(fd
, hostandport
, flags
);
1144 * Separate original protocol components prog and path
1145 * from extended host header with a NUL byte.
1147 * Note: Do not add any other headers here! Doing so
1148 * will cause older git-daemon servers to crash.
1150 strbuf_addf(&request
,
1155 /* If using a new version put that stuff here after a second null byte */
1157 strbuf_addch(&request
, '\0');
1158 strbuf_addf(&request
, "version=%d%c",
1162 packet_write(fd
[1], request
.buf
, request
.len
);
1165 strbuf_release(&request
);
1170 * Append the appropriate environment variables to `env` and options to
1171 * `args` for running ssh in Git's SSH-tunneled transport.
1173 static void push_ssh_options(struct argv_array
*args
, struct argv_array
*env
,
1174 enum ssh_variant variant
, const char *port
,
1175 enum protocol_version version
, int flags
)
1177 if (variant
== VARIANT_SSH
&&
1179 argv_array_push(args
, "-o");
1180 argv_array_push(args
, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT
);
1181 argv_array_pushf(env
, GIT_PROTOCOL_ENVIRONMENT
"=version=%d",
1185 if (flags
& CONNECT_IPV4
) {
1188 BUG("VARIANT_AUTO passed to push_ssh_options");
1189 case VARIANT_SIMPLE
:
1190 die(_("ssh variant 'simple' does not support -4"));
1194 case VARIANT_TORTOISEPLINK
:
1195 argv_array_push(args
, "-4");
1197 } else if (flags
& CONNECT_IPV6
) {
1200 BUG("VARIANT_AUTO passed to push_ssh_options");
1201 case VARIANT_SIMPLE
:
1202 die(_("ssh variant 'simple' does not support -6"));
1206 case VARIANT_TORTOISEPLINK
:
1207 argv_array_push(args
, "-6");
1211 if (variant
== VARIANT_TORTOISEPLINK
)
1212 argv_array_push(args
, "-batch");
1217 BUG("VARIANT_AUTO passed to push_ssh_options");
1218 case VARIANT_SIMPLE
:
1219 die(_("ssh variant 'simple' does not support setting port"));
1221 argv_array_push(args
, "-p");
1225 case VARIANT_TORTOISEPLINK
:
1226 argv_array_push(args
, "-P");
1229 argv_array_push(args
, port
);
1233 /* Prepare a child_process for use by Git's SSH-tunneled transport. */
1234 static void fill_ssh_args(struct child_process
*conn
, const char *ssh_host
,
1235 const char *port
, enum protocol_version version
,
1239 enum ssh_variant variant
;
1241 if (looks_like_command_line_option(ssh_host
))
1242 die(_("strange hostname '%s' blocked"), ssh_host
);
1244 ssh
= get_ssh_command();
1246 variant
= determine_ssh_variant(ssh
, 1);
1249 * GIT_SSH is the no-shell version of
1250 * GIT_SSH_COMMAND (and must remain so for
1251 * historical compatibility).
1253 conn
->use_shell
= 0;
1255 ssh
= getenv("GIT_SSH");
1258 variant
= determine_ssh_variant(ssh
, 0);
1261 if (variant
== VARIANT_AUTO
) {
1262 struct child_process detect
= CHILD_PROCESS_INIT
;
1264 detect
.use_shell
= conn
->use_shell
;
1265 detect
.no_stdin
= detect
.no_stdout
= detect
.no_stderr
= 1;
1267 argv_array_push(&detect
.args
, ssh
);
1268 argv_array_push(&detect
.args
, "-G");
1269 push_ssh_options(&detect
.args
, &detect
.env_array
,
1270 VARIANT_SSH
, port
, version
, flags
);
1271 argv_array_push(&detect
.args
, ssh_host
);
1273 variant
= run_command(&detect
) ? VARIANT_SIMPLE
: VARIANT_SSH
;
1276 argv_array_push(&conn
->args
, ssh
);
1277 push_ssh_options(&conn
->args
, &conn
->env_array
, variant
, port
, version
, flags
);
1278 argv_array_push(&conn
->args
, ssh_host
);
1282 * This returns the dummy child_process `no_fork` if the transport protocol
1283 * does not need fork(2), or a struct child_process object if it does. Once
1284 * done, finish the connection with finish_connect() with the value returned
1285 * from this function (it is safe to call finish_connect() with NULL to
1286 * support the former case).
1288 * If it returns, the connect is successful; it just dies on errors (this
1289 * will hopefully be changed in a libification effort, to return NULL when
1290 * the connection failed).
1292 struct child_process
*git_connect(int fd
[2], const char *url
,
1293 const char *prog
, int flags
)
1295 char *hostandport
, *path
;
1296 struct child_process
*conn
;
1297 enum protocol protocol
;
1298 enum protocol_version version
= get_protocol_version_config();
1301 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
1302 * to perform a push, then fallback to v0 since the client doesn't know
1303 * how to push yet using v2.
1305 if (version
== protocol_v2
&& !strcmp("git-receive-pack", prog
))
1306 version
= protocol_v0
;
1308 /* Without this we cannot rely on waitpid() to tell
1309 * what happened to our children.
1311 signal(SIGCHLD
, SIG_DFL
);
1313 protocol
= parse_connect_url(url
, &hostandport
, &path
);
1314 if ((flags
& CONNECT_DIAG_URL
) && (protocol
!= PROTO_SSH
)) {
1315 printf("Diag: url=%s\n", url
? url
: "NULL");
1316 printf("Diag: protocol=%s\n", prot_name(protocol
));
1317 printf("Diag: hostandport=%s\n", hostandport
? hostandport
: "NULL");
1318 printf("Diag: path=%s\n", path
? path
: "NULL");
1320 } else if (protocol
== PROTO_GIT
) {
1321 conn
= git_connect_git(fd
, hostandport
, path
, prog
, version
, flags
);
1322 conn
->trace2_child_class
= "transport/git";
1324 struct strbuf cmd
= STRBUF_INIT
;
1325 const char *const *var
;
1327 conn
= xmalloc(sizeof(*conn
));
1328 child_process_init(conn
);
1330 if (looks_like_command_line_option(path
))
1331 die(_("strange pathname '%s' blocked"), path
);
1333 strbuf_addstr(&cmd
, prog
);
1334 strbuf_addch(&cmd
, ' ');
1335 sq_quote_buf(&cmd
, path
);
1337 /* remove repo-local variables from the environment */
1338 for (var
= local_repo_env
; *var
; var
++)
1339 argv_array_push(&conn
->env_array
, *var
);
1341 conn
->use_shell
= 1;
1342 conn
->in
= conn
->out
= -1;
1343 if (protocol
== PROTO_SSH
) {
1344 char *ssh_host
= hostandport
;
1345 const char *port
= NULL
;
1346 transport_check_allowed("ssh");
1347 get_host_and_port(&ssh_host
, &port
);
1350 port
= get_port(ssh_host
);
1352 if (flags
& CONNECT_DIAG_URL
) {
1353 printf("Diag: url=%s\n", url
? url
: "NULL");
1354 printf("Diag: protocol=%s\n", prot_name(protocol
));
1355 printf("Diag: userandhost=%s\n", ssh_host
? ssh_host
: "NULL");
1356 printf("Diag: port=%s\n", port
? port
: "NONE");
1357 printf("Diag: path=%s\n", path
? path
: "NULL");
1362 strbuf_release(&cmd
);
1365 conn
->trace2_child_class
= "transport/ssh";
1366 fill_ssh_args(conn
, ssh_host
, port
, version
, flags
);
1368 transport_check_allowed("file");
1369 conn
->trace2_child_class
= "transport/file";
1371 argv_array_pushf(&conn
->env_array
, GIT_PROTOCOL_ENVIRONMENT
"=version=%d",
1375 argv_array_push(&conn
->args
, cmd
.buf
);
1377 if (start_command(conn
))
1378 die(_("unable to fork"));
1380 fd
[0] = conn
->out
; /* read from child's stdout */
1381 fd
[1] = conn
->in
; /* write to child's stdin */
1382 strbuf_release(&cmd
);
1389 int finish_connect(struct child_process
*conn
)
1392 if (!conn
|| git_connection_is_socket(conn
))
1395 code
= finish_command(conn
);