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 *parse_feature_value(const char *, const char *, int *);
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_supports_feature(const char *c
, const char *feature
,
91 for (i
= 0; i
< server_capabilities_v2
.argc
; i
++) {
93 if (skip_prefix(server_capabilities_v2
.argv
[i
], c
, &out
) &&
94 (!*out
|| *(out
++) == '=')) {
95 if (parse_feature_request(out
, feature
))
103 die(_("server doesn't support feature '%s'"), feature
);
108 static void process_capabilities_v2(struct packet_reader
*reader
)
110 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
)
111 argv_array_push(&server_capabilities_v2
, reader
->line
);
113 if (reader
->status
!= PACKET_READ_FLUSH
)
114 die(_("expected flush after capabilities"));
117 enum protocol_version
discover_version(struct packet_reader
*reader
)
119 enum protocol_version version
= protocol_unknown_version
;
122 * Peek the first line of the server's response to
123 * determine the protocol version the server is speaking.
125 switch (packet_reader_peek(reader
)) {
126 case PACKET_READ_EOF
:
127 die_initial_contact(0);
128 case PACKET_READ_FLUSH
:
129 case PACKET_READ_DELIM
:
130 case PACKET_READ_RESPONSE_END
:
131 version
= protocol_v0
;
133 case PACKET_READ_NORMAL
:
134 version
= determine_protocol_version_client(reader
->line
);
140 process_capabilities_v2(reader
);
143 /* Read the peeked version line */
144 packet_reader_read(reader
);
148 case protocol_unknown_version
:
149 BUG("unknown protocol version");
155 static void parse_one_symref_info(struct string_list
*symref
, const char *val
, int len
)
158 struct string_list_item
*item
;
161 return; /* just "symref" */
162 /* e.g. "symref=HEAD:refs/heads/master" */
163 sym
= xmemdupz(val
, len
);
164 target
= strchr(sym
, ':');
166 /* just "symref=something" */
169 if (check_refname_format(sym
, REFNAME_ALLOW_ONELEVEL
) ||
170 check_refname_format(target
, REFNAME_ALLOW_ONELEVEL
))
171 /* "symref=bogus:pair */
173 item
= string_list_append_nodup(symref
, sym
);
181 static void annotate_refs_with_symref_info(struct ref
*ref
)
183 struct string_list symref
= STRING_LIST_INIT_DUP
;
184 const char *feature_list
= server_capabilities_v1
;
186 while (feature_list
) {
190 val
= parse_feature_value(feature_list
, "symref", &len
);
193 parse_one_symref_info(&symref
, val
, len
);
194 feature_list
= val
+ 1;
196 string_list_sort(&symref
);
198 for (; ref
; ref
= ref
->next
) {
199 struct string_list_item
*item
;
200 item
= string_list_lookup(&symref
, ref
->name
);
203 ref
->symref
= xstrdup((char *)item
->util
);
205 string_list_clear(&symref
, 0);
208 static void process_capabilities(const char *line
, int *len
)
210 int nul_location
= strlen(line
);
211 if (nul_location
== *len
)
213 server_capabilities_v1
= xstrdup(line
+ nul_location
+ 1);
217 static int process_dummy_ref(const char *line
)
219 struct object_id oid
;
222 if (parse_oid_hex(line
, &oid
, &name
))
228 return oideq(&null_oid
, &oid
) && !strcmp(name
, "capabilities^{}");
231 static void check_no_capabilities(const char *line
, int len
)
233 if (strlen(line
) != len
)
234 warning(_("ignoring capabilities after first line '%s'"),
235 line
+ strlen(line
));
238 static int process_ref(const char *line
, int len
, struct ref
***list
,
239 unsigned int flags
, struct oid_array
*extra_have
)
241 struct object_id old_oid
;
244 if (parse_oid_hex(line
, &old_oid
, &name
))
250 if (extra_have
&& !strcmp(name
, ".have")) {
251 oid_array_append(extra_have
, &old_oid
);
252 } else if (!strcmp(name
, "capabilities^{}")) {
253 die(_("protocol error: unexpected capabilities^{}"));
254 } else if (check_ref(name
, flags
)) {
255 struct ref
*ref
= alloc_ref(name
);
256 oidcpy(&ref
->old_oid
, &old_oid
);
260 check_no_capabilities(line
, len
);
264 static int process_shallow(const char *line
, int len
,
265 struct oid_array
*shallow_points
)
268 struct object_id old_oid
;
270 if (!skip_prefix(line
, "shallow ", &arg
))
273 if (get_oid_hex(arg
, &old_oid
))
274 die(_("protocol error: expected shallow sha-1, got '%s'"), arg
);
276 die(_("repository on the other end cannot be shallow"));
277 oid_array_append(shallow_points
, &old_oid
);
278 check_no_capabilities(line
, len
);
282 enum get_remote_heads_state
{
283 EXPECTING_FIRST_REF
= 0,
290 * Read all the refs from the other end
292 struct ref
**get_remote_heads(struct packet_reader
*reader
,
293 struct ref
**list
, unsigned int flags
,
294 struct oid_array
*extra_have
,
295 struct oid_array
*shallow_points
)
297 struct ref
**orig_list
= list
;
299 enum get_remote_heads_state state
= EXPECTING_FIRST_REF
;
303 while (state
!= EXPECTING_DONE
) {
304 switch (packet_reader_read(reader
)) {
305 case PACKET_READ_EOF
:
306 die_initial_contact(1);
307 case PACKET_READ_NORMAL
:
308 len
= reader
->pktlen
;
310 case PACKET_READ_FLUSH
:
311 state
= EXPECTING_DONE
;
313 case PACKET_READ_DELIM
:
314 case PACKET_READ_RESPONSE_END
:
315 die(_("invalid packet"));
319 case EXPECTING_FIRST_REF
:
320 process_capabilities(reader
->line
, &len
);
321 if (process_dummy_ref(reader
->line
)) {
322 state
= EXPECTING_SHALLOW
;
325 state
= EXPECTING_REF
;
328 if (process_ref(reader
->line
, len
, &list
, flags
, extra_have
))
330 state
= EXPECTING_SHALLOW
;
332 case EXPECTING_SHALLOW
:
333 if (process_shallow(reader
->line
, len
, shallow_points
))
335 die(_("protocol error: unexpected '%s'"), reader
->line
);
341 annotate_refs_with_symref_info(*orig_list
);
346 /* Returns 1 when a valid ref has been added to `list`, 0 otherwise */
347 static int process_ref_v2(const char *line
, struct ref
***list
)
351 struct object_id old_oid
;
353 struct string_list line_sections
= STRING_LIST_INIT_DUP
;
357 * Ref lines have a number of fields which are space deliminated. The
358 * first field is the OID of the ref. The second field is the ref
359 * name. Subsequent fields (symref-target and peeled) are optional and
360 * don't have a particular order.
362 if (string_list_split(&line_sections
, line
, ' ', -1) < 2) {
367 if (parse_oid_hex(line_sections
.items
[i
++].string
, &old_oid
, &end
) ||
373 ref
= alloc_ref(line_sections
.items
[i
++].string
);
375 oidcpy(&ref
->old_oid
, &old_oid
);
379 for (; i
< line_sections
.nr
; i
++) {
380 const char *arg
= line_sections
.items
[i
].string
;
381 if (skip_prefix(arg
, "symref-target:", &arg
))
382 ref
->symref
= xstrdup(arg
);
384 if (skip_prefix(arg
, "peeled:", &arg
)) {
385 struct object_id peeled_oid
;
388 if (parse_oid_hex(arg
, &peeled_oid
, &end
) || *end
) {
393 peeled_name
= xstrfmt("%s^{}", ref
->name
);
394 peeled
= alloc_ref(peeled_name
);
396 oidcpy(&peeled
->old_oid
, &peeled_oid
);
398 *list
= &peeled
->next
;
405 string_list_clear(&line_sections
, 0);
409 struct ref
**get_remote_refs(int fd_out
, struct packet_reader
*reader
,
410 struct ref
**list
, int for_push
,
411 const struct argv_array
*ref_prefixes
,
412 const struct string_list
*server_options
)
417 if (server_supports_v2("ls-refs", 1))
418 packet_write_fmt(fd_out
, "command=ls-refs\n");
420 if (server_supports_v2("agent", 0))
421 packet_write_fmt(fd_out
, "agent=%s", git_user_agent_sanitized());
423 if (server_options
&& server_options
->nr
&&
424 server_supports_v2("server-option", 1))
425 for (i
= 0; i
< server_options
->nr
; i
++)
426 packet_write_fmt(fd_out
, "server-option=%s",
427 server_options
->items
[i
].string
);
429 packet_delim(fd_out
);
430 /* When pushing we don't want to request the peeled tags */
432 packet_write_fmt(fd_out
, "peel\n");
433 packet_write_fmt(fd_out
, "symrefs\n");
434 for (i
= 0; ref_prefixes
&& i
< ref_prefixes
->argc
; i
++) {
435 packet_write_fmt(fd_out
, "ref-prefix %s\n",
436 ref_prefixes
->argv
[i
]);
438 packet_flush(fd_out
);
440 /* Process response from server */
441 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
442 if (!process_ref_v2(reader
->line
, &list
))
443 die(_("invalid ls-refs response: %s"), reader
->line
);
446 if (reader
->status
!= PACKET_READ_FLUSH
)
447 die(_("expected flush after ref listing"));
452 static const char *parse_feature_value(const char *feature_list
, const char *feature
, int *lenp
)
459 len
= strlen(feature
);
460 while (*feature_list
) {
461 const char *found
= strstr(feature_list
, feature
);
464 if (feature_list
== found
|| isspace(found
[-1])) {
465 const char *value
= found
+ len
;
466 /* feature with no value (e.g., "thin-pack") */
467 if (!*value
|| isspace(*value
)) {
472 /* feature with a value (e.g., "agent=git/1.2.3") */
473 else if (*value
== '=') {
476 *lenp
= strcspn(value
, " \t\n");
480 * otherwise we matched a substring of another feature;
484 feature_list
= found
+ 1;
489 int parse_feature_request(const char *feature_list
, const char *feature
)
491 return !!parse_feature_value(feature_list
, feature
, NULL
);
494 const char *server_feature_value(const char *feature
, int *len
)
496 return parse_feature_value(server_capabilities_v1
, feature
, len
);
499 int server_supports(const char *feature
)
501 return !!server_feature_value(feature
, NULL
);
511 int url_is_local_not_ssh(const char *url
)
513 const char *colon
= strchr(url
, ':');
514 const char *slash
= strchr(url
, '/');
515 return !colon
|| (slash
&& slash
< colon
) ||
516 (has_dos_drive_prefix(url
) && is_valid_path(url
));
519 static const char *prot_name(enum protocol protocol
)
530 return "unknown protocol";
534 static enum protocol
get_protocol(const char *name
)
536 if (!strcmp(name
, "ssh"))
538 if (!strcmp(name
, "git"))
540 if (!strcmp(name
, "git+ssh")) /* deprecated - do not use */
542 if (!strcmp(name
, "ssh+git")) /* deprecated - do not use */
544 if (!strcmp(name
, "file"))
546 die(_("protocol '%s' is not supported"), name
);
549 static char *host_end(char **hoststart
, int removebrackets
)
551 char *host
= *hoststart
;
553 char *start
= strstr(host
, "@[");
555 start
++; /* Jump over '@' */
558 if (start
[0] == '[') {
559 end
= strchr(start
+ 1, ']');
561 if (removebrackets
) {
563 memmove(start
, start
+ 1, end
- start
);
574 #define STR(s) STR_(s)
576 static void get_host_and_port(char **host
, const char **port
)
579 end
= host_end(host
, 1);
580 colon
= strchr(end
, ':');
582 long portnr
= strtol(colon
+ 1, &end
, 10);
583 if (end
!= colon
+ 1 && *end
== '\0' && 0 <= portnr
&& portnr
< 65536) {
586 } else if (!colon
[1]) {
592 static void enable_keepalive(int sockfd
)
596 if (setsockopt(sockfd
, SOL_SOCKET
, SO_KEEPALIVE
, &ka
, sizeof(ka
)) < 0)
597 error_errno(_("unable to set SO_KEEPALIVE on socket"));
602 static const char *ai_name(const struct addrinfo
*ai
)
604 static char addr
[NI_MAXHOST
];
605 if (getnameinfo(ai
->ai_addr
, ai
->ai_addrlen
, addr
, sizeof(addr
), NULL
, 0,
606 NI_NUMERICHOST
) != 0)
607 xsnprintf(addr
, sizeof(addr
), "(unknown)");
613 * Returns a connected socket() fd, or else die()s.
615 static int git_tcp_connect_sock(char *host
, int flags
)
617 struct strbuf error_message
= STRBUF_INIT
;
619 const char *port
= STR(DEFAULT_GIT_PORT
);
620 struct addrinfo hints
, *ai0
, *ai
;
624 get_host_and_port(&host
, &port
);
628 memset(&hints
, 0, sizeof(hints
));
629 if (flags
& CONNECT_IPV4
)
630 hints
.ai_family
= AF_INET
;
631 else if (flags
& CONNECT_IPV6
)
632 hints
.ai_family
= AF_INET6
;
633 hints
.ai_socktype
= SOCK_STREAM
;
634 hints
.ai_protocol
= IPPROTO_TCP
;
636 if (flags
& CONNECT_VERBOSE
)
637 fprintf(stderr
, _("Looking up %s ... "), host
);
639 gai
= getaddrinfo(host
, port
, &hints
, &ai
);
641 die(_("unable to look up %s (port %s) (%s)"), host
, port
, gai_strerror(gai
));
643 if (flags
& CONNECT_VERBOSE
)
644 /* TRANSLATORS: this is the end of "Looking up %s ... " */
645 fprintf(stderr
, _("done.\nConnecting to %s (port %s) ... "), host
, port
);
647 for (ai0
= ai
; ai
; ai
= ai
->ai_next
, cnt
++) {
648 sockfd
= socket(ai
->ai_family
,
649 ai
->ai_socktype
, ai
->ai_protocol
);
651 (connect(sockfd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0)) {
652 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
653 host
, cnt
, ai_name(ai
), strerror(errno
));
659 if (flags
& CONNECT_VERBOSE
)
660 fprintf(stderr
, "%s ", ai_name(ai
));
667 die(_("unable to connect to %s:\n%s"), host
, error_message
.buf
);
669 enable_keepalive(sockfd
);
671 if (flags
& CONNECT_VERBOSE
)
672 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
673 fprintf_ln(stderr
, _("done."));
675 strbuf_release(&error_message
);
683 * Returns a connected socket() fd, or else die()s.
685 static int git_tcp_connect_sock(char *host
, int flags
)
687 struct strbuf error_message
= STRBUF_INIT
;
689 const char *port
= STR(DEFAULT_GIT_PORT
);
692 struct sockaddr_in sa
;
697 get_host_and_port(&host
, &port
);
699 if (flags
& CONNECT_VERBOSE
)
700 fprintf(stderr
, _("Looking up %s ... "), host
);
702 he
= gethostbyname(host
);
704 die(_("unable to look up %s (%s)"), host
, hstrerror(h_errno
));
705 nport
= strtoul(port
, &ep
, 10);
706 if ( ep
== port
|| *ep
) {
708 struct servent
*se
= getservbyname(port
,"tcp");
710 die(_("unknown port %s"), port
);
714 if (flags
& CONNECT_VERBOSE
)
715 /* TRANSLATORS: this is the end of "Looking up %s ... " */
716 fprintf(stderr
, _("done.\nConnecting to %s (port %s) ... "), host
, port
);
718 for (cnt
= 0, ap
= he
->h_addr_list
; *ap
; ap
++, cnt
++) {
719 memset(&sa
, 0, sizeof sa
);
720 sa
.sin_family
= he
->h_addrtype
;
721 sa
.sin_port
= htons(nport
);
722 memcpy(&sa
.sin_addr
, *ap
, he
->h_length
);
724 sockfd
= socket(he
->h_addrtype
, SOCK_STREAM
, 0);
726 connect(sockfd
, (struct sockaddr
*)&sa
, sizeof sa
) < 0) {
727 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
730 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
),
737 if (flags
& CONNECT_VERBOSE
)
738 fprintf(stderr
, "%s ",
739 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
));
744 die(_("unable to connect to %s:\n%s"), host
, error_message
.buf
);
746 enable_keepalive(sockfd
);
748 if (flags
& CONNECT_VERBOSE
)
749 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
750 fprintf_ln(stderr
, _("done."));
759 * Dummy child_process returned by git_connect() if the transport protocol
760 * does not need fork(2).
762 static struct child_process no_fork
= CHILD_PROCESS_INIT
;
764 int git_connection_is_socket(struct child_process
*conn
)
766 return conn
== &no_fork
;
769 static struct child_process
*git_tcp_connect(int fd
[2], char *host
, int flags
)
771 int sockfd
= git_tcp_connect_sock(host
, flags
);
780 static char *git_proxy_command
;
782 static int git_proxy_command_options(const char *var
, const char *value
,
785 if (!strcmp(var
, "core.gitproxy")) {
789 const char *rhost_name
= cb
;
790 int rhost_len
= strlen(rhost_name
);
792 if (git_proxy_command
)
795 return config_error_nonbool(var
);
797 * ;# matches www.kernel.org as well
798 * gitproxy = netcatter-1 for kernel.org
799 * gitproxy = netcatter-2 for sample.xz
800 * gitproxy = netcatter-default
802 for_pos
= strstr(value
, " for ");
804 /* matches everybody */
805 matchlen
= strlen(value
);
807 hostlen
= strlen(for_pos
+ 5);
808 if (rhost_len
< hostlen
)
810 else if (!strncmp(for_pos
+ 5,
811 rhost_name
+ rhost_len
- hostlen
,
813 ((rhost_len
== hostlen
) ||
814 rhost_name
[rhost_len
- hostlen
-1] == '.'))
815 matchlen
= for_pos
- value
;
820 /* core.gitproxy = none for kernel.org */
822 !memcmp(value
, "none", 4))
824 git_proxy_command
= xmemdupz(value
, matchlen
);
829 return git_default_config(var
, value
, cb
);
832 static int git_use_proxy(const char *host
)
834 git_proxy_command
= getenv("GIT_PROXY_COMMAND");
835 git_config(git_proxy_command_options
, (void*)host
);
836 return (git_proxy_command
&& *git_proxy_command
);
839 static struct child_process
*git_proxy_connect(int fd
[2], char *host
)
841 const char *port
= STR(DEFAULT_GIT_PORT
);
842 struct child_process
*proxy
;
844 get_host_and_port(&host
, &port
);
846 if (looks_like_command_line_option(host
))
847 die(_("strange hostname '%s' blocked"), host
);
848 if (looks_like_command_line_option(port
))
849 die(_("strange port '%s' blocked"), port
);
851 proxy
= xmalloc(sizeof(*proxy
));
852 child_process_init(proxy
);
853 argv_array_push(&proxy
->args
, git_proxy_command
);
854 argv_array_push(&proxy
->args
, host
);
855 argv_array_push(&proxy
->args
, port
);
858 if (start_command(proxy
))
859 die(_("cannot start proxy %s"), git_proxy_command
);
860 fd
[0] = proxy
->out
; /* read from proxy stdout */
861 fd
[1] = proxy
->in
; /* write to proxy stdin */
865 static char *get_port(char *host
)
868 char *p
= strchr(host
, ':');
871 long port
= strtol(p
+ 1, &end
, 10);
872 if (end
!= p
+ 1 && *end
== '\0' && 0 <= port
&& port
< 65536) {
882 * Extract protocol and relevant parts from the specified connection URL.
883 * The caller must free() the returned strings.
885 static enum protocol
parse_connect_url(const char *url_orig
, char **ret_host
,
892 enum protocol protocol
= PROTO_LOCAL
;
894 if (is_url(url_orig
))
895 url
= url_decode(url_orig
);
897 url
= xstrdup(url_orig
);
899 host
= strstr(url
, "://");
902 protocol
= get_protocol(url
);
906 if (!url_is_local_not_ssh(url
)) {
907 protocol
= PROTO_SSH
;
913 * Don't do destructive transforms as protocol code does
914 * '[]' unwrapping in get_host_and_port()
916 end
= host_end(&host
, 0);
918 if (protocol
== PROTO_LOCAL
)
920 else if (protocol
== PROTO_FILE
&& *host
!= '/' &&
921 !has_dos_drive_prefix(host
) &&
922 offset_1st_component(host
- 2) > 1)
923 path
= host
- 2; /* include the leading "//" */
924 else if (protocol
== PROTO_FILE
&& has_dos_drive_prefix(end
))
925 path
= end
; /* "file://$(pwd)" may be "file://C:/projects/repo" */
927 path
= strchr(end
, separator
);
930 die(_("no path specified; see 'git help pull' for valid url syntax"));
933 * null-terminate hostname and point path to ~ for URL's like this:
934 * ssh://host.xz/~user/repo
937 end
= path
; /* Need to \0 terminate host here */
938 if (separator
== ':')
939 path
++; /* path starts after ':' */
940 if (protocol
== PROTO_GIT
|| protocol
== PROTO_SSH
) {
945 path
= xstrdup(path
);
948 *ret_host
= xstrdup(host
);
954 static const char *get_ssh_command(void)
958 if ((ssh
= getenv("GIT_SSH_COMMAND")))
961 if (!git_config_get_string_const("core.sshcommand", &ssh
))
973 VARIANT_TORTOISEPLINK
,
976 static void override_ssh_variant(enum ssh_variant
*ssh_variant
)
978 const char *variant
= getenv("GIT_SSH_VARIANT");
980 if (!variant
&& git_config_get_string_const("ssh.variant", &variant
))
983 if (!strcmp(variant
, "auto"))
984 *ssh_variant
= VARIANT_AUTO
;
985 else if (!strcmp(variant
, "plink"))
986 *ssh_variant
= VARIANT_PLINK
;
987 else if (!strcmp(variant
, "putty"))
988 *ssh_variant
= VARIANT_PUTTY
;
989 else if (!strcmp(variant
, "tortoiseplink"))
990 *ssh_variant
= VARIANT_TORTOISEPLINK
;
991 else if (!strcmp(variant
, "simple"))
992 *ssh_variant
= VARIANT_SIMPLE
;
994 *ssh_variant
= VARIANT_SSH
;
997 static enum ssh_variant
determine_ssh_variant(const char *ssh_command
,
1000 enum ssh_variant ssh_variant
= VARIANT_AUTO
;
1001 const char *variant
;
1004 override_ssh_variant(&ssh_variant
);
1006 if (ssh_variant
!= VARIANT_AUTO
)
1010 p
= xstrdup(ssh_command
);
1011 variant
= basename(p
);
1013 const char **ssh_argv
;
1015 p
= xstrdup(ssh_command
);
1016 if (split_cmdline(p
, &ssh_argv
) > 0) {
1017 variant
= basename((char *)ssh_argv
[0]);
1019 * At this point, variant points into the buffer
1020 * referenced by p, hence we do not need ssh_argv
1030 if (!strcasecmp(variant
, "ssh") ||
1031 !strcasecmp(variant
, "ssh.exe"))
1032 ssh_variant
= VARIANT_SSH
;
1033 else if (!strcasecmp(variant
, "plink") ||
1034 !strcasecmp(variant
, "plink.exe"))
1035 ssh_variant
= VARIANT_PLINK
;
1036 else if (!strcasecmp(variant
, "tortoiseplink") ||
1037 !strcasecmp(variant
, "tortoiseplink.exe"))
1038 ssh_variant
= VARIANT_TORTOISEPLINK
;
1045 * Open a connection using Git's native protocol.
1047 * The caller is responsible for freeing hostandport, but this function may
1048 * modify it (for example, to truncate it to remove the port part).
1050 static struct child_process
*git_connect_git(int fd
[2], char *hostandport
,
1051 const char *path
, const char *prog
,
1052 enum protocol_version version
,
1055 struct child_process
*conn
;
1056 struct strbuf request
= STRBUF_INIT
;
1058 * Set up virtual host information based on where we will
1059 * connect, unless the user has overridden us in
1062 char *target_host
= getenv("GIT_OVERRIDE_VIRTUAL_HOST");
1064 target_host
= xstrdup(target_host
);
1066 target_host
= xstrdup(hostandport
);
1068 transport_check_allowed("git");
1071 * These underlying connection commands die() if they
1074 if (git_use_proxy(hostandport
))
1075 conn
= git_proxy_connect(fd
, hostandport
);
1077 conn
= git_tcp_connect(fd
, hostandport
, flags
);
1079 * Separate original protocol components prog and path
1080 * from extended host header with a NUL byte.
1082 * Note: Do not add any other headers here! Doing so
1083 * will cause older git-daemon servers to crash.
1085 strbuf_addf(&request
,
1090 /* If using a new version put that stuff here after a second null byte */
1092 strbuf_addch(&request
, '\0');
1093 strbuf_addf(&request
, "version=%d%c",
1097 packet_write(fd
[1], request
.buf
, request
.len
);
1100 strbuf_release(&request
);
1105 * Append the appropriate environment variables to `env` and options to
1106 * `args` for running ssh in Git's SSH-tunneled transport.
1108 static void push_ssh_options(struct argv_array
*args
, struct argv_array
*env
,
1109 enum ssh_variant variant
, const char *port
,
1110 enum protocol_version version
, int flags
)
1112 if (variant
== VARIANT_SSH
&&
1114 argv_array_push(args
, "-o");
1115 argv_array_push(args
, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT
);
1116 argv_array_pushf(env
, GIT_PROTOCOL_ENVIRONMENT
"=version=%d",
1120 if (flags
& CONNECT_IPV4
) {
1123 BUG("VARIANT_AUTO passed to push_ssh_options");
1124 case VARIANT_SIMPLE
:
1125 die(_("ssh variant 'simple' does not support -4"));
1129 case VARIANT_TORTOISEPLINK
:
1130 argv_array_push(args
, "-4");
1132 } else if (flags
& CONNECT_IPV6
) {
1135 BUG("VARIANT_AUTO passed to push_ssh_options");
1136 case VARIANT_SIMPLE
:
1137 die(_("ssh variant 'simple' does not support -6"));
1141 case VARIANT_TORTOISEPLINK
:
1142 argv_array_push(args
, "-6");
1146 if (variant
== VARIANT_TORTOISEPLINK
)
1147 argv_array_push(args
, "-batch");
1152 BUG("VARIANT_AUTO passed to push_ssh_options");
1153 case VARIANT_SIMPLE
:
1154 die(_("ssh variant 'simple' does not support setting port"));
1156 argv_array_push(args
, "-p");
1160 case VARIANT_TORTOISEPLINK
:
1161 argv_array_push(args
, "-P");
1164 argv_array_push(args
, port
);
1168 /* Prepare a child_process for use by Git's SSH-tunneled transport. */
1169 static void fill_ssh_args(struct child_process
*conn
, const char *ssh_host
,
1170 const char *port
, enum protocol_version version
,
1174 enum ssh_variant variant
;
1176 if (looks_like_command_line_option(ssh_host
))
1177 die(_("strange hostname '%s' blocked"), ssh_host
);
1179 ssh
= get_ssh_command();
1181 variant
= determine_ssh_variant(ssh
, 1);
1184 * GIT_SSH is the no-shell version of
1185 * GIT_SSH_COMMAND (and must remain so for
1186 * historical compatibility).
1188 conn
->use_shell
= 0;
1190 ssh
= getenv("GIT_SSH");
1193 variant
= determine_ssh_variant(ssh
, 0);
1196 if (variant
== VARIANT_AUTO
) {
1197 struct child_process detect
= CHILD_PROCESS_INIT
;
1199 detect
.use_shell
= conn
->use_shell
;
1200 detect
.no_stdin
= detect
.no_stdout
= detect
.no_stderr
= 1;
1202 argv_array_push(&detect
.args
, ssh
);
1203 argv_array_push(&detect
.args
, "-G");
1204 push_ssh_options(&detect
.args
, &detect
.env_array
,
1205 VARIANT_SSH
, port
, version
, flags
);
1206 argv_array_push(&detect
.args
, ssh_host
);
1208 variant
= run_command(&detect
) ? VARIANT_SIMPLE
: VARIANT_SSH
;
1211 argv_array_push(&conn
->args
, ssh
);
1212 push_ssh_options(&conn
->args
, &conn
->env_array
, variant
, port
, version
, flags
);
1213 argv_array_push(&conn
->args
, ssh_host
);
1217 * This returns the dummy child_process `no_fork` if the transport protocol
1218 * does not need fork(2), or a struct child_process object if it does. Once
1219 * done, finish the connection with finish_connect() with the value returned
1220 * from this function (it is safe to call finish_connect() with NULL to
1221 * support the former case).
1223 * If it returns, the connect is successful; it just dies on errors (this
1224 * will hopefully be changed in a libification effort, to return NULL when
1225 * the connection failed).
1227 struct child_process
*git_connect(int fd
[2], const char *url
,
1228 const char *prog
, int flags
)
1230 char *hostandport
, *path
;
1231 struct child_process
*conn
;
1232 enum protocol protocol
;
1233 enum protocol_version version
= get_protocol_version_config();
1236 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
1237 * to perform a push, then fallback to v0 since the client doesn't know
1238 * how to push yet using v2.
1240 if (version
== protocol_v2
&& !strcmp("git-receive-pack", prog
))
1241 version
= protocol_v0
;
1243 /* Without this we cannot rely on waitpid() to tell
1244 * what happened to our children.
1246 signal(SIGCHLD
, SIG_DFL
);
1248 protocol
= parse_connect_url(url
, &hostandport
, &path
);
1249 if ((flags
& CONNECT_DIAG_URL
) && (protocol
!= PROTO_SSH
)) {
1250 printf("Diag: url=%s\n", url
? url
: "NULL");
1251 printf("Diag: protocol=%s\n", prot_name(protocol
));
1252 printf("Diag: hostandport=%s\n", hostandport
? hostandport
: "NULL");
1253 printf("Diag: path=%s\n", path
? path
: "NULL");
1255 } else if (protocol
== PROTO_GIT
) {
1256 conn
= git_connect_git(fd
, hostandport
, path
, prog
, version
, flags
);
1257 conn
->trace2_child_class
= "transport/git";
1259 struct strbuf cmd
= STRBUF_INIT
;
1260 const char *const *var
;
1262 conn
= xmalloc(sizeof(*conn
));
1263 child_process_init(conn
);
1265 if (looks_like_command_line_option(path
))
1266 die(_("strange pathname '%s' blocked"), path
);
1268 strbuf_addstr(&cmd
, prog
);
1269 strbuf_addch(&cmd
, ' ');
1270 sq_quote_buf(&cmd
, path
);
1272 /* remove repo-local variables from the environment */
1273 for (var
= local_repo_env
; *var
; var
++)
1274 argv_array_push(&conn
->env_array
, *var
);
1276 conn
->use_shell
= 1;
1277 conn
->in
= conn
->out
= -1;
1278 if (protocol
== PROTO_SSH
) {
1279 char *ssh_host
= hostandport
;
1280 const char *port
= NULL
;
1281 transport_check_allowed("ssh");
1282 get_host_and_port(&ssh_host
, &port
);
1285 port
= get_port(ssh_host
);
1287 if (flags
& CONNECT_DIAG_URL
) {
1288 printf("Diag: url=%s\n", url
? url
: "NULL");
1289 printf("Diag: protocol=%s\n", prot_name(protocol
));
1290 printf("Diag: userandhost=%s\n", ssh_host
? ssh_host
: "NULL");
1291 printf("Diag: port=%s\n", port
? port
: "NONE");
1292 printf("Diag: path=%s\n", path
? path
: "NULL");
1297 strbuf_release(&cmd
);
1300 conn
->trace2_child_class
= "transport/ssh";
1301 fill_ssh_args(conn
, ssh_host
, port
, version
, flags
);
1303 transport_check_allowed("file");
1304 conn
->trace2_child_class
= "transport/file";
1306 argv_array_pushf(&conn
->env_array
, GIT_PROTOCOL_ENVIRONMENT
"=version=%d",
1310 argv_array_push(&conn
->args
, cmd
.buf
);
1312 if (start_command(conn
))
1313 die(_("unable to fork"));
1315 fd
[0] = conn
->out
; /* read from child's stdout */
1316 fd
[1] = conn
->in
; /* write to child's stdin */
1317 strbuf_release(&cmd
);
1324 int finish_connect(struct child_process
*conn
)
1327 if (!conn
|| git_connection_is_socket(conn
))
1330 code
= finish_command(conn
);