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 void check_stateless_delimiter(int stateless_rpc
,
410 struct packet_reader
*reader
,
414 return; /* not in stateless mode, no delimiter expected */
415 if (packet_reader_read(reader
) != PACKET_READ_RESPONSE_END
)
419 struct ref
**get_remote_refs(int fd_out
, struct packet_reader
*reader
,
420 struct ref
**list
, int for_push
,
421 const struct argv_array
*ref_prefixes
,
422 const struct string_list
*server_options
,
428 if (server_supports_v2("ls-refs", 1))
429 packet_write_fmt(fd_out
, "command=ls-refs\n");
431 if (server_supports_v2("agent", 0))
432 packet_write_fmt(fd_out
, "agent=%s", git_user_agent_sanitized());
434 if (server_options
&& server_options
->nr
&&
435 server_supports_v2("server-option", 1))
436 for (i
= 0; i
< server_options
->nr
; i
++)
437 packet_write_fmt(fd_out
, "server-option=%s",
438 server_options
->items
[i
].string
);
440 packet_delim(fd_out
);
441 /* When pushing we don't want to request the peeled tags */
443 packet_write_fmt(fd_out
, "peel\n");
444 packet_write_fmt(fd_out
, "symrefs\n");
445 for (i
= 0; ref_prefixes
&& i
< ref_prefixes
->argc
; i
++) {
446 packet_write_fmt(fd_out
, "ref-prefix %s\n",
447 ref_prefixes
->argv
[i
]);
449 packet_flush(fd_out
);
451 /* Process response from server */
452 while (packet_reader_read(reader
) == PACKET_READ_NORMAL
) {
453 if (!process_ref_v2(reader
->line
, &list
))
454 die(_("invalid ls-refs response: %s"), reader
->line
);
457 if (reader
->status
!= PACKET_READ_FLUSH
)
458 die(_("expected flush after ref listing"));
460 check_stateless_delimiter(stateless_rpc
, reader
,
461 _("expected response end packet after ref listing"));
466 static const char *parse_feature_value(const char *feature_list
, const char *feature
, int *lenp
)
473 len
= strlen(feature
);
474 while (*feature_list
) {
475 const char *found
= strstr(feature_list
, feature
);
478 if (feature_list
== found
|| isspace(found
[-1])) {
479 const char *value
= found
+ len
;
480 /* feature with no value (e.g., "thin-pack") */
481 if (!*value
|| isspace(*value
)) {
486 /* feature with a value (e.g., "agent=git/1.2.3") */
487 else if (*value
== '=') {
490 *lenp
= strcspn(value
, " \t\n");
494 * otherwise we matched a substring of another feature;
498 feature_list
= found
+ 1;
503 int parse_feature_request(const char *feature_list
, const char *feature
)
505 return !!parse_feature_value(feature_list
, feature
, NULL
);
508 const char *server_feature_value(const char *feature
, int *len
)
510 return parse_feature_value(server_capabilities_v1
, feature
, len
);
513 int server_supports(const char *feature
)
515 return !!server_feature_value(feature
, NULL
);
525 int url_is_local_not_ssh(const char *url
)
527 const char *colon
= strchr(url
, ':');
528 const char *slash
= strchr(url
, '/');
529 return !colon
|| (slash
&& slash
< colon
) ||
530 (has_dos_drive_prefix(url
) && is_valid_path(url
));
533 static const char *prot_name(enum protocol protocol
)
544 return "unknown protocol";
548 static enum protocol
get_protocol(const char *name
)
550 if (!strcmp(name
, "ssh"))
552 if (!strcmp(name
, "git"))
554 if (!strcmp(name
, "git+ssh")) /* deprecated - do not use */
556 if (!strcmp(name
, "ssh+git")) /* deprecated - do not use */
558 if (!strcmp(name
, "file"))
560 die(_("protocol '%s' is not supported"), name
);
563 static char *host_end(char **hoststart
, int removebrackets
)
565 char *host
= *hoststart
;
567 char *start
= strstr(host
, "@[");
569 start
++; /* Jump over '@' */
572 if (start
[0] == '[') {
573 end
= strchr(start
+ 1, ']');
575 if (removebrackets
) {
577 memmove(start
, start
+ 1, end
- start
);
588 #define STR(s) STR_(s)
590 static void get_host_and_port(char **host
, const char **port
)
593 end
= host_end(host
, 1);
594 colon
= strchr(end
, ':');
596 long portnr
= strtol(colon
+ 1, &end
, 10);
597 if (end
!= colon
+ 1 && *end
== '\0' && 0 <= portnr
&& portnr
< 65536) {
600 } else if (!colon
[1]) {
606 static void enable_keepalive(int sockfd
)
610 if (setsockopt(sockfd
, SOL_SOCKET
, SO_KEEPALIVE
, &ka
, sizeof(ka
)) < 0)
611 error_errno(_("unable to set SO_KEEPALIVE on socket"));
616 static const char *ai_name(const struct addrinfo
*ai
)
618 static char addr
[NI_MAXHOST
];
619 if (getnameinfo(ai
->ai_addr
, ai
->ai_addrlen
, addr
, sizeof(addr
), NULL
, 0,
620 NI_NUMERICHOST
) != 0)
621 xsnprintf(addr
, sizeof(addr
), "(unknown)");
627 * Returns a connected socket() fd, or else die()s.
629 static int git_tcp_connect_sock(char *host
, int flags
)
631 struct strbuf error_message
= STRBUF_INIT
;
633 const char *port
= STR(DEFAULT_GIT_PORT
);
634 struct addrinfo hints
, *ai0
, *ai
;
638 get_host_and_port(&host
, &port
);
642 memset(&hints
, 0, sizeof(hints
));
643 if (flags
& CONNECT_IPV4
)
644 hints
.ai_family
= AF_INET
;
645 else if (flags
& CONNECT_IPV6
)
646 hints
.ai_family
= AF_INET6
;
647 hints
.ai_socktype
= SOCK_STREAM
;
648 hints
.ai_protocol
= IPPROTO_TCP
;
650 if (flags
& CONNECT_VERBOSE
)
651 fprintf(stderr
, _("Looking up %s ... "), host
);
653 gai
= getaddrinfo(host
, port
, &hints
, &ai
);
655 die(_("unable to look up %s (port %s) (%s)"), host
, port
, gai_strerror(gai
));
657 if (flags
& CONNECT_VERBOSE
)
658 /* TRANSLATORS: this is the end of "Looking up %s ... " */
659 fprintf(stderr
, _("done.\nConnecting to %s (port %s) ... "), host
, port
);
661 for (ai0
= ai
; ai
; ai
= ai
->ai_next
, cnt
++) {
662 sockfd
= socket(ai
->ai_family
,
663 ai
->ai_socktype
, ai
->ai_protocol
);
665 (connect(sockfd
, ai
->ai_addr
, ai
->ai_addrlen
) < 0)) {
666 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
667 host
, cnt
, ai_name(ai
), strerror(errno
));
673 if (flags
& CONNECT_VERBOSE
)
674 fprintf(stderr
, "%s ", ai_name(ai
));
681 die(_("unable to connect to %s:\n%s"), host
, error_message
.buf
);
683 enable_keepalive(sockfd
);
685 if (flags
& CONNECT_VERBOSE
)
686 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
687 fprintf_ln(stderr
, _("done."));
689 strbuf_release(&error_message
);
697 * Returns a connected socket() fd, or else die()s.
699 static int git_tcp_connect_sock(char *host
, int flags
)
701 struct strbuf error_message
= STRBUF_INIT
;
703 const char *port
= STR(DEFAULT_GIT_PORT
);
706 struct sockaddr_in sa
;
711 get_host_and_port(&host
, &port
);
713 if (flags
& CONNECT_VERBOSE
)
714 fprintf(stderr
, _("Looking up %s ... "), host
);
716 he
= gethostbyname(host
);
718 die(_("unable to look up %s (%s)"), host
, hstrerror(h_errno
));
719 nport
= strtoul(port
, &ep
, 10);
720 if ( ep
== port
|| *ep
) {
722 struct servent
*se
= getservbyname(port
,"tcp");
724 die(_("unknown port %s"), port
);
728 if (flags
& CONNECT_VERBOSE
)
729 /* TRANSLATORS: this is the end of "Looking up %s ... " */
730 fprintf(stderr
, _("done.\nConnecting to %s (port %s) ... "), host
, port
);
732 for (cnt
= 0, ap
= he
->h_addr_list
; *ap
; ap
++, cnt
++) {
733 memset(&sa
, 0, sizeof sa
);
734 sa
.sin_family
= he
->h_addrtype
;
735 sa
.sin_port
= htons(nport
);
736 memcpy(&sa
.sin_addr
, *ap
, he
->h_length
);
738 sockfd
= socket(he
->h_addrtype
, SOCK_STREAM
, 0);
740 connect(sockfd
, (struct sockaddr
*)&sa
, sizeof sa
) < 0) {
741 strbuf_addf(&error_message
, "%s[%d: %s]: errno=%s\n",
744 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
),
751 if (flags
& CONNECT_VERBOSE
)
752 fprintf(stderr
, "%s ",
753 inet_ntoa(*(struct in_addr
*)&sa
.sin_addr
));
758 die(_("unable to connect to %s:\n%s"), host
, error_message
.buf
);
760 enable_keepalive(sockfd
);
762 if (flags
& CONNECT_VERBOSE
)
763 /* TRANSLATORS: this is the end of "Connecting to %s (port %s) ... " */
764 fprintf_ln(stderr
, _("done."));
773 * Dummy child_process returned by git_connect() if the transport protocol
774 * does not need fork(2).
776 static struct child_process no_fork
= CHILD_PROCESS_INIT
;
778 int git_connection_is_socket(struct child_process
*conn
)
780 return conn
== &no_fork
;
783 static struct child_process
*git_tcp_connect(int fd
[2], char *host
, int flags
)
785 int sockfd
= git_tcp_connect_sock(host
, flags
);
794 static char *git_proxy_command
;
796 static int git_proxy_command_options(const char *var
, const char *value
,
799 if (!strcmp(var
, "core.gitproxy")) {
803 const char *rhost_name
= cb
;
804 int rhost_len
= strlen(rhost_name
);
806 if (git_proxy_command
)
809 return config_error_nonbool(var
);
811 * ;# matches www.kernel.org as well
812 * gitproxy = netcatter-1 for kernel.org
813 * gitproxy = netcatter-2 for sample.xz
814 * gitproxy = netcatter-default
816 for_pos
= strstr(value
, " for ");
818 /* matches everybody */
819 matchlen
= strlen(value
);
821 hostlen
= strlen(for_pos
+ 5);
822 if (rhost_len
< hostlen
)
824 else if (!strncmp(for_pos
+ 5,
825 rhost_name
+ rhost_len
- hostlen
,
827 ((rhost_len
== hostlen
) ||
828 rhost_name
[rhost_len
- hostlen
-1] == '.'))
829 matchlen
= for_pos
- value
;
834 /* core.gitproxy = none for kernel.org */
836 !memcmp(value
, "none", 4))
838 git_proxy_command
= xmemdupz(value
, matchlen
);
843 return git_default_config(var
, value
, cb
);
846 static int git_use_proxy(const char *host
)
848 git_proxy_command
= getenv("GIT_PROXY_COMMAND");
849 git_config(git_proxy_command_options
, (void*)host
);
850 return (git_proxy_command
&& *git_proxy_command
);
853 static struct child_process
*git_proxy_connect(int fd
[2], char *host
)
855 const char *port
= STR(DEFAULT_GIT_PORT
);
856 struct child_process
*proxy
;
858 get_host_and_port(&host
, &port
);
860 if (looks_like_command_line_option(host
))
861 die(_("strange hostname '%s' blocked"), host
);
862 if (looks_like_command_line_option(port
))
863 die(_("strange port '%s' blocked"), port
);
865 proxy
= xmalloc(sizeof(*proxy
));
866 child_process_init(proxy
);
867 argv_array_push(&proxy
->args
, git_proxy_command
);
868 argv_array_push(&proxy
->args
, host
);
869 argv_array_push(&proxy
->args
, port
);
872 if (start_command(proxy
))
873 die(_("cannot start proxy %s"), git_proxy_command
);
874 fd
[0] = proxy
->out
; /* read from proxy stdout */
875 fd
[1] = proxy
->in
; /* write to proxy stdin */
879 static char *get_port(char *host
)
882 char *p
= strchr(host
, ':');
885 long port
= strtol(p
+ 1, &end
, 10);
886 if (end
!= p
+ 1 && *end
== '\0' && 0 <= port
&& port
< 65536) {
896 * Extract protocol and relevant parts from the specified connection URL.
897 * The caller must free() the returned strings.
899 static enum protocol
parse_connect_url(const char *url_orig
, char **ret_host
,
906 enum protocol protocol
= PROTO_LOCAL
;
908 if (is_url(url_orig
))
909 url
= url_decode(url_orig
);
911 url
= xstrdup(url_orig
);
913 host
= strstr(url
, "://");
916 protocol
= get_protocol(url
);
920 if (!url_is_local_not_ssh(url
)) {
921 protocol
= PROTO_SSH
;
927 * Don't do destructive transforms as protocol code does
928 * '[]' unwrapping in get_host_and_port()
930 end
= host_end(&host
, 0);
932 if (protocol
== PROTO_LOCAL
)
934 else if (protocol
== PROTO_FILE
&& *host
!= '/' &&
935 !has_dos_drive_prefix(host
) &&
936 offset_1st_component(host
- 2) > 1)
937 path
= host
- 2; /* include the leading "//" */
938 else if (protocol
== PROTO_FILE
&& has_dos_drive_prefix(end
))
939 path
= end
; /* "file://$(pwd)" may be "file://C:/projects/repo" */
941 path
= strchr(end
, separator
);
944 die(_("no path specified; see 'git help pull' for valid url syntax"));
947 * null-terminate hostname and point path to ~ for URL's like this:
948 * ssh://host.xz/~user/repo
951 end
= path
; /* Need to \0 terminate host here */
952 if (separator
== ':')
953 path
++; /* path starts after ':' */
954 if (protocol
== PROTO_GIT
|| protocol
== PROTO_SSH
) {
959 path
= xstrdup(path
);
962 *ret_host
= xstrdup(host
);
968 static const char *get_ssh_command(void)
972 if ((ssh
= getenv("GIT_SSH_COMMAND")))
975 if (!git_config_get_string_const("core.sshcommand", &ssh
))
987 VARIANT_TORTOISEPLINK
,
990 static void override_ssh_variant(enum ssh_variant
*ssh_variant
)
992 const char *variant
= getenv("GIT_SSH_VARIANT");
994 if (!variant
&& git_config_get_string_const("ssh.variant", &variant
))
997 if (!strcmp(variant
, "auto"))
998 *ssh_variant
= VARIANT_AUTO
;
999 else if (!strcmp(variant
, "plink"))
1000 *ssh_variant
= VARIANT_PLINK
;
1001 else if (!strcmp(variant
, "putty"))
1002 *ssh_variant
= VARIANT_PUTTY
;
1003 else if (!strcmp(variant
, "tortoiseplink"))
1004 *ssh_variant
= VARIANT_TORTOISEPLINK
;
1005 else if (!strcmp(variant
, "simple"))
1006 *ssh_variant
= VARIANT_SIMPLE
;
1008 *ssh_variant
= VARIANT_SSH
;
1011 static enum ssh_variant
determine_ssh_variant(const char *ssh_command
,
1014 enum ssh_variant ssh_variant
= VARIANT_AUTO
;
1015 const char *variant
;
1018 override_ssh_variant(&ssh_variant
);
1020 if (ssh_variant
!= VARIANT_AUTO
)
1024 p
= xstrdup(ssh_command
);
1025 variant
= basename(p
);
1027 const char **ssh_argv
;
1029 p
= xstrdup(ssh_command
);
1030 if (split_cmdline(p
, &ssh_argv
) > 0) {
1031 variant
= basename((char *)ssh_argv
[0]);
1033 * At this point, variant points into the buffer
1034 * referenced by p, hence we do not need ssh_argv
1044 if (!strcasecmp(variant
, "ssh") ||
1045 !strcasecmp(variant
, "ssh.exe"))
1046 ssh_variant
= VARIANT_SSH
;
1047 else if (!strcasecmp(variant
, "plink") ||
1048 !strcasecmp(variant
, "plink.exe"))
1049 ssh_variant
= VARIANT_PLINK
;
1050 else if (!strcasecmp(variant
, "tortoiseplink") ||
1051 !strcasecmp(variant
, "tortoiseplink.exe"))
1052 ssh_variant
= VARIANT_TORTOISEPLINK
;
1059 * Open a connection using Git's native protocol.
1061 * The caller is responsible for freeing hostandport, but this function may
1062 * modify it (for example, to truncate it to remove the port part).
1064 static struct child_process
*git_connect_git(int fd
[2], char *hostandport
,
1065 const char *path
, const char *prog
,
1066 enum protocol_version version
,
1069 struct child_process
*conn
;
1070 struct strbuf request
= STRBUF_INIT
;
1072 * Set up virtual host information based on where we will
1073 * connect, unless the user has overridden us in
1076 char *target_host
= getenv("GIT_OVERRIDE_VIRTUAL_HOST");
1078 target_host
= xstrdup(target_host
);
1080 target_host
= xstrdup(hostandport
);
1082 transport_check_allowed("git");
1085 * These underlying connection commands die() if they
1088 if (git_use_proxy(hostandport
))
1089 conn
= git_proxy_connect(fd
, hostandport
);
1091 conn
= git_tcp_connect(fd
, hostandport
, flags
);
1093 * Separate original protocol components prog and path
1094 * from extended host header with a NUL byte.
1096 * Note: Do not add any other headers here! Doing so
1097 * will cause older git-daemon servers to crash.
1099 strbuf_addf(&request
,
1104 /* If using a new version put that stuff here after a second null byte */
1106 strbuf_addch(&request
, '\0');
1107 strbuf_addf(&request
, "version=%d%c",
1111 packet_write(fd
[1], request
.buf
, request
.len
);
1114 strbuf_release(&request
);
1119 * Append the appropriate environment variables to `env` and options to
1120 * `args` for running ssh in Git's SSH-tunneled transport.
1122 static void push_ssh_options(struct argv_array
*args
, struct argv_array
*env
,
1123 enum ssh_variant variant
, const char *port
,
1124 enum protocol_version version
, int flags
)
1126 if (variant
== VARIANT_SSH
&&
1128 argv_array_push(args
, "-o");
1129 argv_array_push(args
, "SendEnv=" GIT_PROTOCOL_ENVIRONMENT
);
1130 argv_array_pushf(env
, GIT_PROTOCOL_ENVIRONMENT
"=version=%d",
1134 if (flags
& CONNECT_IPV4
) {
1137 BUG("VARIANT_AUTO passed to push_ssh_options");
1138 case VARIANT_SIMPLE
:
1139 die(_("ssh variant 'simple' does not support -4"));
1143 case VARIANT_TORTOISEPLINK
:
1144 argv_array_push(args
, "-4");
1146 } else if (flags
& CONNECT_IPV6
) {
1149 BUG("VARIANT_AUTO passed to push_ssh_options");
1150 case VARIANT_SIMPLE
:
1151 die(_("ssh variant 'simple' does not support -6"));
1155 case VARIANT_TORTOISEPLINK
:
1156 argv_array_push(args
, "-6");
1160 if (variant
== VARIANT_TORTOISEPLINK
)
1161 argv_array_push(args
, "-batch");
1166 BUG("VARIANT_AUTO passed to push_ssh_options");
1167 case VARIANT_SIMPLE
:
1168 die(_("ssh variant 'simple' does not support setting port"));
1170 argv_array_push(args
, "-p");
1174 case VARIANT_TORTOISEPLINK
:
1175 argv_array_push(args
, "-P");
1178 argv_array_push(args
, port
);
1182 /* Prepare a child_process for use by Git's SSH-tunneled transport. */
1183 static void fill_ssh_args(struct child_process
*conn
, const char *ssh_host
,
1184 const char *port
, enum protocol_version version
,
1188 enum ssh_variant variant
;
1190 if (looks_like_command_line_option(ssh_host
))
1191 die(_("strange hostname '%s' blocked"), ssh_host
);
1193 ssh
= get_ssh_command();
1195 variant
= determine_ssh_variant(ssh
, 1);
1198 * GIT_SSH is the no-shell version of
1199 * GIT_SSH_COMMAND (and must remain so for
1200 * historical compatibility).
1202 conn
->use_shell
= 0;
1204 ssh
= getenv("GIT_SSH");
1207 variant
= determine_ssh_variant(ssh
, 0);
1210 if (variant
== VARIANT_AUTO
) {
1211 struct child_process detect
= CHILD_PROCESS_INIT
;
1213 detect
.use_shell
= conn
->use_shell
;
1214 detect
.no_stdin
= detect
.no_stdout
= detect
.no_stderr
= 1;
1216 argv_array_push(&detect
.args
, ssh
);
1217 argv_array_push(&detect
.args
, "-G");
1218 push_ssh_options(&detect
.args
, &detect
.env_array
,
1219 VARIANT_SSH
, port
, version
, flags
);
1220 argv_array_push(&detect
.args
, ssh_host
);
1222 variant
= run_command(&detect
) ? VARIANT_SIMPLE
: VARIANT_SSH
;
1225 argv_array_push(&conn
->args
, ssh
);
1226 push_ssh_options(&conn
->args
, &conn
->env_array
, variant
, port
, version
, flags
);
1227 argv_array_push(&conn
->args
, ssh_host
);
1231 * This returns the dummy child_process `no_fork` if the transport protocol
1232 * does not need fork(2), or a struct child_process object if it does. Once
1233 * done, finish the connection with finish_connect() with the value returned
1234 * from this function (it is safe to call finish_connect() with NULL to
1235 * support the former case).
1237 * If it returns, the connect is successful; it just dies on errors (this
1238 * will hopefully be changed in a libification effort, to return NULL when
1239 * the connection failed).
1241 struct child_process
*git_connect(int fd
[2], const char *url
,
1242 const char *prog
, int flags
)
1244 char *hostandport
, *path
;
1245 struct child_process
*conn
;
1246 enum protocol protocol
;
1247 enum protocol_version version
= get_protocol_version_config();
1250 * NEEDSWORK: If we are trying to use protocol v2 and we are planning
1251 * to perform a push, then fallback to v0 since the client doesn't know
1252 * how to push yet using v2.
1254 if (version
== protocol_v2
&& !strcmp("git-receive-pack", prog
))
1255 version
= protocol_v0
;
1257 /* Without this we cannot rely on waitpid() to tell
1258 * what happened to our children.
1260 signal(SIGCHLD
, SIG_DFL
);
1262 protocol
= parse_connect_url(url
, &hostandport
, &path
);
1263 if ((flags
& CONNECT_DIAG_URL
) && (protocol
!= PROTO_SSH
)) {
1264 printf("Diag: url=%s\n", url
? url
: "NULL");
1265 printf("Diag: protocol=%s\n", prot_name(protocol
));
1266 printf("Diag: hostandport=%s\n", hostandport
? hostandport
: "NULL");
1267 printf("Diag: path=%s\n", path
? path
: "NULL");
1269 } else if (protocol
== PROTO_GIT
) {
1270 conn
= git_connect_git(fd
, hostandport
, path
, prog
, version
, flags
);
1271 conn
->trace2_child_class
= "transport/git";
1273 struct strbuf cmd
= STRBUF_INIT
;
1274 const char *const *var
;
1276 conn
= xmalloc(sizeof(*conn
));
1277 child_process_init(conn
);
1279 if (looks_like_command_line_option(path
))
1280 die(_("strange pathname '%s' blocked"), path
);
1282 strbuf_addstr(&cmd
, prog
);
1283 strbuf_addch(&cmd
, ' ');
1284 sq_quote_buf(&cmd
, path
);
1286 /* remove repo-local variables from the environment */
1287 for (var
= local_repo_env
; *var
; var
++)
1288 argv_array_push(&conn
->env_array
, *var
);
1290 conn
->use_shell
= 1;
1291 conn
->in
= conn
->out
= -1;
1292 if (protocol
== PROTO_SSH
) {
1293 char *ssh_host
= hostandport
;
1294 const char *port
= NULL
;
1295 transport_check_allowed("ssh");
1296 get_host_and_port(&ssh_host
, &port
);
1299 port
= get_port(ssh_host
);
1301 if (flags
& CONNECT_DIAG_URL
) {
1302 printf("Diag: url=%s\n", url
? url
: "NULL");
1303 printf("Diag: protocol=%s\n", prot_name(protocol
));
1304 printf("Diag: userandhost=%s\n", ssh_host
? ssh_host
: "NULL");
1305 printf("Diag: port=%s\n", port
? port
: "NONE");
1306 printf("Diag: path=%s\n", path
? path
: "NULL");
1311 strbuf_release(&cmd
);
1314 conn
->trace2_child_class
= "transport/ssh";
1315 fill_ssh_args(conn
, ssh_host
, port
, version
, flags
);
1317 transport_check_allowed("file");
1318 conn
->trace2_child_class
= "transport/file";
1320 argv_array_pushf(&conn
->env_array
, GIT_PROTOCOL_ENVIRONMENT
"=version=%d",
1324 argv_array_push(&conn
->args
, cmd
.buf
);
1326 if (start_command(conn
))
1327 die(_("unable to fork"));
1329 fd
[0] = conn
->out
; /* read from child's stdout */
1330 fd
[1] = conn
->in
; /* write to child's stdin */
1331 strbuf_release(&cmd
);
1338 int finish_connect(struct child_process
*conn
)
1341 if (!conn
|| git_connection_is_socket(conn
))
1344 code
= finish_command(conn
);