5 #include <sys/socket.h>
6 #include <netinet/in.h>
11 * Read all the refs from the other end
13 struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match)
18 unsigned char old_sha1[20];
19 static char buffer[1000];
23 len = packet_read_line(in, buffer, sizeof(buffer));
26 if (buffer[len-1] == '\n')
29 if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
30 die("protocol error: expected sha/ref, got '%s'", buffer);
32 if (nr_match && !path_match(name, nr_match, match))
34 ref = xcalloc(1, sizeof(*ref) + len - 40);
35 memcpy(ref->old_sha1, old_sha1, 20);
36 memcpy(ref->name, buffer + 41, len - 40);
43 int get_ack(int fd, unsigned char *result_sha1)
45 static char line[1000];
46 int len = packet_read_line(fd, line, sizeof(line));
49 die("git-fetch-pack: expected ACK/NAK, got EOF");
50 if (line[len-1] == '\n')
52 if (!strcmp(line, "NAK"))
54 if (!strncmp(line, "ACK ", 3)) {
55 if (!get_sha1_hex(line+4, result_sha1))
58 die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
61 int path_match(const char *path, int nr, char **match)
64 int pathlen = strlen(path);
66 for (i = 0; i < nr; i++) {
70 if (!len || len > pathlen)
72 if (memcmp(path + pathlen - len, s, len))
74 if (pathlen > len && path[pathlen - len - 1] != '/')
87 static struct refspec *parse_ref_spec(int nr_refspec, char **refspec)
90 struct refspec *rs = xmalloc(sizeof(*rs) * (nr_refspec + 1));
91 for (i = 0; i < nr_refspec; i++) {
104 rs[nr_refspec].src = rs[nr_refspec].dst = NULL;
108 static int count_refspec_match(const char *pattern,
110 struct ref **matched_ref)
113 int patlen = strlen(pattern);
115 for (match = 0; refs; refs = refs->next) {
116 char *name = refs->name;
117 int namelen = strlen(name);
118 if (namelen < patlen ||
119 memcmp(name + namelen - patlen, pattern, patlen))
121 if (namelen != patlen && name[namelen - patlen - 1] != '/')
129 static void link_dst_tail(struct ref *ref, struct ref ***tail)
136 static struct ref *try_explicit_object_name(const char *name)
138 unsigned char sha1[20];
141 if (get_sha1(name, sha1))
143 len = strlen(name) + 1;
144 ref = xcalloc(1, sizeof(*ref) + len);
145 memcpy(ref->name, name, len);
146 memcpy(ref->new_sha1, sha1, 20);
150 static int match_explicit_refs(struct ref *src, struct ref *dst,
151 struct ref ***dst_tail, struct refspec *rs)
154 for (i = errs = 0; rs[i].src; i++) {
155 struct ref *matched_src, *matched_dst;
157 matched_src = matched_dst = NULL;
158 switch (count_refspec_match(rs[i].src, src, &matched_src)) {
162 /* The source could be in the get_sha1() format
163 * not a reference name.
165 matched_src = try_explicit_object_name(rs[i].src);
169 error("src refspec %s does not match any.",
174 error("src refspec %s matches more than one.",
178 switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
182 if (!memcmp(rs[i].dst, "refs/", 5)) {
183 int len = strlen(rs[i].dst) + 1;
184 matched_dst = xcalloc(1, sizeof(*dst) + len);
185 memcpy(matched_dst->name, rs[i].dst, len);
186 link_dst_tail(matched_dst, dst_tail);
188 else if (!strcmp(rs[i].src, rs[i].dst) &&
190 /* pushing "master:master" when
191 * remote does not have master yet.
193 int len = strlen(matched_src->name) + 1;
194 matched_dst = xcalloc(1, sizeof(*dst) + len);
195 memcpy(matched_dst->name, matched_src->name,
197 link_dst_tail(matched_dst, dst_tail);
201 error("dst refspec %s does not match any "
202 "existing ref on the remote and does "
203 "not start with refs/.", rs[i].dst);
208 error("dst refspec %s matches more than one.",
214 if (matched_dst->peer_ref) {
216 error("dst ref %s receives from more than one src.",
220 matched_dst->peer_ref = matched_src;
225 static struct ref *find_ref_by_name(struct ref *list, const char *name)
227 for ( ; list; list = list->next)
228 if (!strcmp(list->name, name))
233 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
234 int nr_refspec, char **refspec, int all)
236 struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
239 return match_explicit_refs(src, dst, dst_tail, rs);
241 /* pick the remainder */
242 for ( ; src; src = src->next) {
243 struct ref *dst_peer;
246 dst_peer = find_ref_by_name(dst, src->name);
247 if ((dst_peer && dst_peer->peer_ref) || (!dst_peer && !all))
250 /* Create a new one and link it */
251 int len = strlen(src->name) + 1;
252 dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
253 memcpy(dst_peer->name, src->name, len);
254 memcpy(dst_peer->new_sha1, src->new_sha1, 20);
255 link_dst_tail(dst_peer, dst_tail);
257 dst_peer->peer_ref = src;
268 static enum protocol get_protocol(const char *name)
270 if (!strcmp(name, "ssh"))
272 if (!strcmp(name, "git"))
274 die("I don't handle protocol '%s'", name);
278 #define STR(s) STR_(s)
280 static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
284 char *port = STR(DEFAULT_GIT_PORT);
285 struct addrinfo hints, *ai0, *ai;
288 if (host[0] == '[') {
289 end = strchr(host + 1, ']');
298 colon = strchr(end, ':');
305 memset(&hints, 0, sizeof(hints));
306 hints.ai_socktype = SOCK_STREAM;
307 hints.ai_protocol = IPPROTO_TCP;
309 gai = getaddrinfo(host, port, &hints, &ai);
311 die("Unable to look up %s (%s)", host, gai_strerror(gai));
313 for (ai0 = ai; ai; ai = ai->ai_next) {
314 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
317 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
328 die("unable to connect a socket (%s)", strerror(errno));
332 packet_write(sockfd, "%s %s\n", prog, path);
337 * Yeah, yeah, fixme. Need to pass in the heads etc.
339 int git_connect(int fd[2], char *url, const char *prog)
346 enum protocol protocol;
350 colon = strchr(url, ':');
351 protocol = PROTO_LOCAL;
356 protocol = PROTO_SSH;
357 if (!memcmp(path, "//", 2)) {
358 char *slash = strchr(path + 2, '/');
360 int nr = slash - path - 2;
361 memmove(path, path+2, nr);
363 protocol = get_protocol(url);
370 if (protocol == PROTO_GIT)
371 return git_tcp_connect(fd, prog, host, path);
373 if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
374 die("unable to create pipe pair for communication");
377 snprintf(command, sizeof(command), "%s %s", prog,
379 dup2(pipefd[1][0], 0);
380 dup2(pipefd[0][1], 1);
385 if (protocol == PROTO_SSH) {
386 const char *ssh = getenv("GIT_SSH") ? : "ssh";
387 const char *ssh_basename = strrchr(ssh, '/');
392 execlp(ssh, ssh_basename, host, command, NULL);
395 execlp("sh", "sh", "-c", command, NULL);
398 fd[0] = pipefd[0][0];
399 fd[1] = pipefd[1][1];
405 int finish_connect(pid_t pid)
410 ret = waitpid(pid, NULL, 0);