1 #include "git-compat-util.h"
7 #include <sys/socket.h>
8 #include <netinet/in.h>
13 static char *server_capabilities = NULL;
16 * Read all the refs from the other end
18 struct ref **get_remote_heads(int in, struct ref **list,
19 int nr_match, char **match, int ignore_funny)
24 unsigned char old_sha1[20];
25 static char buffer[1000];
29 len = packet_read_line(in, buffer, sizeof(buffer));
32 if (buffer[len-1] == '\n')
35 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
36 die("protocol error: expected sha/ref, got '%s'", buffer);
39 name_len = strlen(name);
40 if (len != name_len + 41) {
41 if (server_capabilities)
42 free(server_capabilities);
43 server_capabilities = strdup(name + name_len + 1);
46 if (ignore_funny && 45 < len && !memcmp(name, "refs/", 5) &&
47 check_ref_format(name + 5))
50 if (nr_match && !path_match(name, nr_match, match))
52 ref = xcalloc(1, sizeof(*ref) + len - 40);
53 memcpy(ref->old_sha1, old_sha1, 20);
54 memcpy(ref->name, buffer + 41, len - 40);
61 int server_supports(const char *feature)
63 return server_capabilities &&
64 strstr(server_capabilities, feature) != NULL;
67 int get_ack(int fd, unsigned char *result_sha1)
69 static char line[1000];
70 int len = packet_read_line(fd, line, sizeof(line));
73 die("git-fetch-pack: expected ACK/NAK, got EOF");
74 if (line[len-1] == '\n')
76 if (!strcmp(line, "NAK"))
78 if (!strncmp(line, "ACK ", 4)) {
79 if (!get_sha1_hex(line+4, result_sha1)) {
80 if (strstr(line+45, "continue"))
85 die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
88 int path_match(const char *path, int nr, char **match)
91 int pathlen = strlen(path);
93 for (i = 0; i < nr; i++) {
97 if (!len || len > pathlen)
99 if (memcmp(path + pathlen - len, s, len))
101 if (pathlen > len && path[pathlen - len - 1] != '/')
116 * A:B means fast forward remote B with local A.
117 * +A:B means overwrite remote B with local A.
118 * +A is a shorthand for +A:A.
119 * A is a shorthand for A:A.
121 static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
124 struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1));
125 for (i = 0; i < nr_refspec; i++) {
132 ep = strchr(sp, ':');
142 rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
146 static int count_refspec_match(const char *pattern,
148 struct ref **matched_ref)
151 int patlen = strlen(pattern);
153 for (match = 0; refs; refs = refs->next) {
154 char *name = refs->name;
155 int namelen = strlen(name);
156 if (namelen < patlen ||
157 memcmp(name + namelen - patlen, pattern, patlen))
159 if (namelen != patlen && name[namelen - patlen - 1] != '/')
167 static void link_dst_tail(struct ref *ref, struct ref ***tail)
174 static struct ref *try_explicit_object_name(const char *name)
176 unsigned char sha1[20];
179 if (get_sha1(name, sha1))
181 len = strlen(name) + 1;
182 ref = xcalloc(1, sizeof(*ref) + len);
183 memcpy(ref->name, name, len);
184 memcpy(ref->new_sha1, sha1, 20);
188 static int match_explicit_refs(struct ref *src, struct ref *dst,
189 struct ref ***dst_tail, struct refspec *rs)
192 for (i = errs = 0; rs[i].src; i++) {
193 struct ref *matched_src, *matched_dst;
195 matched_src = matched_dst = NULL;
196 switch (count_refspec_match(rs[i].src, src, &matched_src)) {
200 /* The source could be in the get_sha1() format
201 * not a reference name.
203 matched_src = try_explicit_object_name(rs[i].src);
207 error("src refspec %s does not match any.",
212 error("src refspec %s matches more than one.",
216 switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
220 if (!memcmp(rs[i].dst, "refs/", 5)) {
221 int len = strlen(rs[i].dst) + 1;
222 matched_dst = xcalloc(1, sizeof(*dst) + len);
223 memcpy(matched_dst->name, rs[i].dst, len);
224 link_dst_tail(matched_dst, dst_tail);
226 else if (!strcmp(rs[i].src, rs[i].dst) &&
228 /* pushing "master:master" when
229 * remote does not have master yet.
231 int len = strlen(matched_src->name) + 1;
232 matched_dst = xcalloc(1, sizeof(*dst) + len);
233 memcpy(matched_dst->name, matched_src->name,
235 link_dst_tail(matched_dst, dst_tail);
239 error("dst refspec %s does not match any "
240 "existing ref on the remote and does "
241 "not start with refs/.", rs[i].dst);
246 error("dst refspec %s matches more than one.",
252 if (matched_dst->peer_ref) {
254 error("dst ref %s receives from more than one src.",
258 matched_dst->peer_ref = matched_src;
259 matched_dst->force = rs[i].force;
265 static struct ref *find_ref_by_name(struct ref *list, const char *name)
267 for ( ; list; list = list->next)
268 if (!strcmp(list->name, name))
273 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
274 int nr_refspec, char **refspec, int all)
276 struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
279 return match_explicit_refs(src, dst, dst_tail, rs);
281 /* pick the remainder */
282 for ( ; src; src = src->next) {
283 struct ref *dst_peer;
286 dst_peer = find_ref_by_name(dst, src->name);
287 if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
290 /* Create a new one and link it */
291 int len = strlen(src->name) + 1;
292 dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
293 memcpy(dst_peer->name, src->name, len);
294 memcpy(dst_peer->new_sha1, src->new_sha1, 20);
295 link_dst_tail(dst_peer, dst_tail);
297 dst_peer->peer_ref = src;
308 static enum protocol get_protocol(const char *name)
310 if (!strcmp(name, "ssh"))
312 if (!strcmp(name, "git"))
314 if (!strcmp(name, "git+ssh"))
316 if (!strcmp(name, "ssh+git"))
318 die("I don't handle protocol '%s'", name);
322 #define STR(s) STR_(s)
327 * Returns a connected socket() fd, or else die()s.
329 static int git_tcp_connect_sock(char *host)
333 char *port = STR(DEFAULT_GIT_PORT);
334 struct addrinfo hints, *ai0, *ai;
337 if (host[0] == '[') {
338 end = strchr(host + 1, ']');
347 colon = strchr(end, ':');
354 memset(&hints, 0, sizeof(hints));
355 hints.ai_socktype = SOCK_STREAM;
356 hints.ai_protocol = IPPROTO_TCP;
358 gai = getaddrinfo(host, port, &hints, &ai);
360 die("Unable to look up %s (%s)", host, gai_strerror(gai));
362 for (ai0 = ai; ai; ai = ai->ai_next) {
363 sockfd = socket(ai->ai_family,
364 ai->ai_socktype, ai->ai_protocol);
367 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
378 die("unable to connect a socket (%s)", strerror(errno));
386 * Returns a connected socket() fd, or else die()s.
388 static int git_tcp_connect_sock(char *host)
392 char *port = STR(DEFAULT_GIT_PORT), *ep;
394 struct sockaddr_in sa;
398 if (host[0] == '[') {
399 end = strchr(host + 1, ']');
408 colon = strchr(end, ':');
415 he = gethostbyname(host);
417 die("Unable to look up %s (%s)", host, hstrerror(h_errno));
418 nport = strtoul(port, &ep, 10);
419 if ( ep == port || *ep ) {
421 struct servent *se = getservbyname(port,"tcp");
423 die("Unknown port %s\n", port);
427 for (ap = he->h_addr_list; *ap; ap++) {
428 sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
432 memset(&sa, 0, sizeof sa);
433 sa.sin_family = he->h_addrtype;
434 sa.sin_port = htons(nport);
435 memcpy(&sa.sin_addr, *ap, he->h_length);
437 if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
446 die("unable to connect a socket (%s)", strerror(errno));
454 static void git_tcp_connect(int fd[2],
455 const char *prog, char *host, char *path)
457 int sockfd = git_tcp_connect_sock(host);
464 static char *git_proxy_command = NULL;
465 static const char *rhost_name = NULL;
466 static int rhost_len;
468 static int git_proxy_command_options(const char *var, const char *value)
470 if (!strcmp(var, "core.gitproxy")) {
475 if (git_proxy_command)
478 * ;# matches www.kernel.org as well
479 * gitproxy = netcatter-1 for kernel.org
480 * gitproxy = netcatter-2 for sample.xz
481 * gitproxy = netcatter-default
483 for_pos = strstr(value, " for ");
485 /* matches everybody */
486 matchlen = strlen(value);
488 hostlen = strlen(for_pos + 5);
489 if (rhost_len < hostlen)
491 else if (!strncmp(for_pos + 5,
492 rhost_name + rhost_len - hostlen,
494 ((rhost_len == hostlen) ||
495 rhost_name[rhost_len - hostlen -1] == '.'))
496 matchlen = for_pos - value;
501 /* core.gitproxy = none for kernel.org */
503 !memcmp(value, "none", 4))
505 git_proxy_command = xmalloc(matchlen + 1);
506 memcpy(git_proxy_command, value, matchlen);
507 git_proxy_command[matchlen] = 0;
512 return git_default_config(var, value);
515 static int git_use_proxy(const char *host)
518 rhost_len = strlen(host);
519 git_proxy_command = getenv("GIT_PROXY_COMMAND");
520 git_config(git_proxy_command_options);
522 return (git_proxy_command && *git_proxy_command);
525 static void git_proxy_connect(int fd[2],
526 const char *prog, char *host, char *path)
528 char *port = STR(DEFAULT_GIT_PORT);
533 if (host[0] == '[') {
534 end = strchr(host + 1, ']');
543 colon = strchr(end, ':');
550 if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
551 die("unable to create pipe pair for communication");
554 dup2(pipefd[1][0], 0);
555 dup2(pipefd[0][1], 1);
560 execlp(git_proxy_command, git_proxy_command, host, port, NULL);
565 fd[0] = pipefd[0][0];
566 fd[1] = pipefd[1][1];
572 * Yeah, yeah, fixme. Need to pass in the heads etc.
574 int git_connect(int fd[2], char *url, const char *prog)
577 char *host, *path = url;
582 enum protocol protocol = PROTO_LOCAL;
585 /* Without this we cannot rely on waitpid() to tell
586 * what happened to our children.
588 signal(SIGCHLD, SIG_DFL);
590 host = strstr(url, "://");
593 protocol = get_protocol(url);
601 if (host[0] == '[') {
602 end = strchr(host + 1, ']');
612 path = strchr(end, c);
615 protocol = PROTO_SSH;
622 die("No path specified. See 'man git-pull' for valid url syntax");
625 * null-terminate hostname and point path to ~ for URL's like this:
626 * ssh://host.xz/~user/repo
628 if (protocol != PROTO_LOCAL && host != url) {
640 if (protocol == PROTO_GIT) {
641 /* These underlying connection commands die() if they
644 char *target_host = strdup(host);
645 if (git_use_proxy(host))
646 git_proxy_connect(fd, prog, host, path);
648 git_tcp_connect(fd, prog, host, path);
650 * Separate original protocol components prog and path
651 * from extended components with a NUL byte.
663 if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
664 die("unable to create pipe pair for communication");
667 die("unable to fork");
669 snprintf(command, sizeof(command), "%s %s", prog,
671 dup2(pipefd[1][0], 0);
672 dup2(pipefd[0][1], 1);
677 if (protocol == PROTO_SSH) {
678 const char *ssh, *ssh_basename;
679 ssh = getenv("GIT_SSH");
680 if (!ssh) ssh = "ssh";
681 ssh_basename = strrchr(ssh, '/');
686 execlp(ssh, ssh_basename, host, command, NULL);
689 unsetenv(ALTERNATE_DB_ENVIRONMENT);
690 unsetenv(DB_ENVIRONMENT);
691 unsetenv(GIT_DIR_ENVIRONMENT);
692 unsetenv(GRAFT_ENVIRONMENT);
693 unsetenv(INDEX_ENVIRONMENT);
694 execlp("sh", "sh", "-c", command, NULL);
698 fd[0] = pipefd[0][0];
699 fd[1] = pipefd[1][1];
707 int finish_connect(pid_t pid)
712 ret = waitpid(pid, NULL, 0);