6 #include <sys/socket.h>
7 #include <netinet/in.h>
12 * Read all the refs from the other end
14 struct ref **get_remote_heads(int in, struct ref **list,
15 int nr_match, char **match, int ignore_funny)
20 unsigned char old_sha1[20];
21 static char buffer[1000];
25 len = packet_read_line(in, buffer, sizeof(buffer));
28 if (buffer[len-1] == '\n')
31 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
32 die("protocol error: expected sha/ref, got '%s'", buffer);
35 if (ignore_funny && 45 < len && !memcmp(name, "refs/", 5) &&
36 check_ref_format(name + 5))
39 if (nr_match && !path_match(name, nr_match, match))
41 ref = xcalloc(1, sizeof(*ref) + len - 40);
42 memcpy(ref->old_sha1, old_sha1, 20);
43 memcpy(ref->name, buffer + 41, len - 40);
50 int get_ack(int fd, unsigned char *result_sha1)
52 static char line[1000];
53 int len = packet_read_line(fd, line, sizeof(line));
56 die("git-fetch-pack: expected ACK/NAK, got EOF");
57 if (line[len-1] == '\n')
59 if (!strcmp(line, "NAK"))
61 if (!strncmp(line, "ACK ", 3)) {
62 if (!get_sha1_hex(line+4, result_sha1)) {
63 if (strstr(line+45, "continue"))
68 die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
71 int path_match(const char *path, int nr, char **match)
74 int pathlen = strlen(path);
76 for (i = 0; i < nr; i++) {
80 if (!len || len > pathlen)
82 if (memcmp(path + pathlen - len, s, len))
84 if (pathlen > len && path[pathlen - len - 1] != '/')
99 * A:B means fast forward remote B with local A.
100 * +A:B means overwrite remote B with local A.
101 * +A is a shorthand for +A:A.
102 * A is a shorthand for A:A.
104 static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
107 struct refspec *rs = xcalloc(sizeof(*rs), (nr_refspec + 1));
108 for (i = 0; i < nr_refspec; i++) {
115 ep = strchr(sp, ':');
125 rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
129 static int count_refspec_match(const char *pattern,
131 struct ref **matched_ref)
134 int patlen = strlen(pattern);
136 for (match = 0; refs; refs = refs->next) {
137 char *name = refs->name;
138 int namelen = strlen(name);
139 if (namelen < patlen ||
140 memcmp(name + namelen - patlen, pattern, patlen))
142 if (namelen != patlen && name[namelen - patlen - 1] != '/')
150 static void link_dst_tail(struct ref *ref, struct ref ***tail)
157 static struct ref *try_explicit_object_name(const char *name)
159 unsigned char sha1[20];
162 if (get_sha1(name, sha1))
164 len = strlen(name) + 1;
165 ref = xcalloc(1, sizeof(*ref) + len);
166 memcpy(ref->name, name, len);
167 memcpy(ref->new_sha1, sha1, 20);
171 static int match_explicit_refs(struct ref *src, struct ref *dst,
172 struct ref ***dst_tail, struct refspec *rs)
175 for (i = errs = 0; rs[i].src; i++) {
176 struct ref *matched_src, *matched_dst;
178 matched_src = matched_dst = NULL;
179 switch (count_refspec_match(rs[i].src, src, &matched_src)) {
183 /* The source could be in the get_sha1() format
184 * not a reference name.
186 matched_src = try_explicit_object_name(rs[i].src);
190 error("src refspec %s does not match any.",
195 error("src refspec %s matches more than one.",
199 switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
203 if (!memcmp(rs[i].dst, "refs/", 5)) {
204 int len = strlen(rs[i].dst) + 1;
205 matched_dst = xcalloc(1, sizeof(*dst) + len);
206 memcpy(matched_dst->name, rs[i].dst, len);
207 link_dst_tail(matched_dst, dst_tail);
209 else if (!strcmp(rs[i].src, rs[i].dst) &&
211 /* pushing "master:master" when
212 * remote does not have master yet.
214 int len = strlen(matched_src->name) + 1;
215 matched_dst = xcalloc(1, sizeof(*dst) + len);
216 memcpy(matched_dst->name, matched_src->name,
218 link_dst_tail(matched_dst, dst_tail);
222 error("dst refspec %s does not match any "
223 "existing ref on the remote and does "
224 "not start with refs/.", rs[i].dst);
229 error("dst refspec %s matches more than one.",
235 if (matched_dst->peer_ref) {
237 error("dst ref %s receives from more than one src.",
241 matched_dst->peer_ref = matched_src;
242 matched_dst->force = rs[i].force;
248 static struct ref *find_ref_by_name(struct ref *list, const char *name)
250 for ( ; list; list = list->next)
251 if (!strcmp(list->name, name))
256 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
257 int nr_refspec, char **refspec, int all)
259 struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
262 return match_explicit_refs(src, dst, dst_tail, rs);
264 /* pick the remainder */
265 for ( ; src; src = src->next) {
266 struct ref *dst_peer;
269 dst_peer = find_ref_by_name(dst, src->name);
270 if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
273 /* Create a new one and link it */
274 int len = strlen(src->name) + 1;
275 dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
276 memcpy(dst_peer->name, src->name, len);
277 memcpy(dst_peer->new_sha1, src->new_sha1, 20);
278 link_dst_tail(dst_peer, dst_tail);
280 dst_peer->peer_ref = src;
291 static enum protocol get_protocol(const char *name)
293 if (!strcmp(name, "ssh"))
295 if (!strcmp(name, "git"))
297 if (!strcmp(name, "git+ssh"))
299 if (!strcmp(name, "ssh+git"))
301 die("I don't handle protocol '%s'", name);
305 #define STR(s) STR_(s)
309 static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
313 char *port = STR(DEFAULT_GIT_PORT);
314 struct addrinfo hints, *ai0, *ai;
317 if (host[0] == '[') {
318 end = strchr(host + 1, ']');
327 colon = strchr(end, ':');
334 memset(&hints, 0, sizeof(hints));
335 hints.ai_socktype = SOCK_STREAM;
336 hints.ai_protocol = IPPROTO_TCP;
338 gai = getaddrinfo(host, port, &hints, &ai);
340 die("Unable to look up %s (%s)", host, gai_strerror(gai));
342 for (ai0 = ai; ai; ai = ai->ai_next) {
343 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
346 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
357 die("unable to connect a socket (%s)", strerror(errno));
361 packet_write(sockfd, "%s %s\n", prog, path);
367 static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
371 char *port = STR(DEFAULT_GIT_PORT), *ep;
373 struct sockaddr_in sa;
377 if (host[0] == '[') {
378 end = strchr(host + 1, ']');
387 colon = strchr(end, ':');
395 he = gethostbyname(host);
397 die("Unable to look up %s (%s)", host, hstrerror(h_errno));
398 nport = strtoul(port, &ep, 10);
399 if ( ep == port || *ep ) {
401 struct servent *se = getservbyname(port,"tcp");
403 die("Unknown port %s\n", port);
407 for (ap = he->h_addr_list; *ap; ap++) {
408 sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
412 memset(&sa, 0, sizeof sa);
413 sa.sin_family = he->h_addrtype;
414 sa.sin_port = htons(nport);
415 memcpy(&sa.sin_addr, ap, he->h_length);
417 if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
426 die("unable to connect a socket (%s)", strerror(errno));
430 packet_write(sockfd, "%s %s\n", prog, path);
437 * Yeah, yeah, fixme. Need to pass in the heads etc.
439 int git_connect(int fd[2], char *url, const char *prog)
446 enum protocol protocol;
450 colon = strchr(url, ':');
451 protocol = PROTO_LOCAL;
456 protocol = PROTO_SSH;
457 if (!memcmp(path, "//", 2)) {
458 char *slash = strchr(path + 2, '/');
460 int nr = slash - path - 2;
461 memmove(path, path+2, nr);
463 protocol = get_protocol(url);
470 if (protocol == PROTO_GIT)
471 return git_tcp_connect(fd, prog, host, path);
473 if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
474 die("unable to create pipe pair for communication");
477 snprintf(command, sizeof(command), "%s %s", prog,
479 dup2(pipefd[1][0], 0);
480 dup2(pipefd[0][1], 1);
485 if (protocol == PROTO_SSH) {
486 const char *ssh, *ssh_basename;
487 ssh = getenv("GIT_SSH");
488 if (!ssh) ssh = "ssh";
489 ssh_basename = strrchr(ssh, '/');
494 execlp(ssh, ssh_basename, host, command, NULL);
497 execlp("sh", "sh", "-c", command, NULL);
500 fd[0] = pipefd[0][0];
501 fd[1] = pipefd[1][1];
507 int finish_connect(pid_t pid)
512 ret = waitpid(pid, NULL, 0);