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 int match_explicit_refs(struct ref *src, struct ref *dst,
137 struct ref ***dst_tail, struct refspec *rs)
140 for (i = errs = 0; rs[i].src; i++) {
141 struct ref *matched_src, *matched_dst;
143 matched_src = matched_dst = NULL;
144 switch (count_refspec_match(rs[i].src, src, &matched_src)) {
149 error("src refspec %s does not match any.");
153 error("src refspec %s matches more than one.",
157 switch (count_refspec_match(rs[i].dst, dst, &matched_dst)) {
161 if (!memcmp(rs[i].dst, "refs/", 5)) {
162 int len = strlen(rs[i].dst) + 1;
163 matched_dst = xcalloc(1, sizeof(*dst) + len);
164 memcpy(matched_dst->name, rs[i].dst, len);
165 link_dst_tail(matched_dst, dst_tail);
167 else if (!strcmp(rs[i].src, rs[i].dst) &&
169 /* pushing "master:master" when
170 * remote does not have master yet.
172 int len = strlen(matched_src->name);
173 matched_dst = xcalloc(1, sizeof(*dst) + len);
174 memcpy(matched_dst->name, matched_src->name,
176 link_dst_tail(matched_dst, dst_tail);
180 error("dst refspec %s does not match any "
181 "existing ref on the remote and does "
182 "not start with refs/.", rs[i].dst);
187 error("dst refspec %s matches more than one.",
193 if (matched_src->peer_ref) {
195 error("src ref %s is sent to more than one dst.",
199 matched_src->peer_ref = matched_dst;
200 if (matched_dst->peer_ref) {
202 error("dst ref %s receives from more than one src.",
206 matched_dst->peer_ref = matched_src;
211 static struct ref *find_ref_by_name(struct ref *list, const char *name)
213 for ( ; list; list = list->next)
214 if (!strcmp(list->name, name))
219 int match_refs(struct ref *src, struct ref *dst, struct ref ***dst_tail,
220 int nr_refspec, char **refspec, int all)
222 struct refspec *rs = parse_ref_spec(nr_refspec, refspec);
225 return match_explicit_refs(src, dst, dst_tail, rs);
227 /* pick the remainder */
228 for ( ; src; src = src->next) {
229 struct ref *dst_peer;
232 dst_peer = find_ref_by_name(dst, src->name);
233 if (dst_peer && dst_peer->peer_ref)
238 /* Create a new one and link it */
239 int len = strlen(src->name) + 1;
240 dst_peer = xcalloc(1, sizeof(*dst_peer) + len);
241 memcpy(dst_peer->name, src->name, len);
242 memcpy(dst_peer->new_sha1, src->new_sha1, 20);
243 link_dst_tail(dst_peer, dst_tail);
245 dst_peer->peer_ref = src;
256 static enum protocol get_protocol(const char *name)
258 if (!strcmp(name, "ssh"))
260 if (!strcmp(name, "git"))
262 die("I don't handle protocol '%s'", name);
266 #define STR(s) STR_(s)
268 static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
272 char *port = STR(DEFAULT_GIT_PORT);
273 struct addrinfo hints, *ai0, *ai;
276 if (host[0] == '[') {
277 end = strchr(host + 1, ']');
286 colon = strchr(end, ':');
293 memset(&hints, 0, sizeof(hints));
294 hints.ai_socktype = SOCK_STREAM;
295 hints.ai_protocol = IPPROTO_TCP;
297 gai = getaddrinfo(host, port, &hints, &ai);
299 die("Unable to look up %s (%s)", host, gai_strerror(gai));
301 for (ai0 = ai; ai; ai = ai->ai_next) {
302 sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
305 if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
316 die("unable to connect a socket (%s)", strerror(errno));
320 packet_write(sockfd, "%s %s\n", prog, path);
325 * Yeah, yeah, fixme. Need to pass in the heads etc.
327 int git_connect(int fd[2], char *url, const char *prog)
334 enum protocol protocol;
338 colon = strchr(url, ':');
339 protocol = PROTO_LOCAL;
344 protocol = PROTO_SSH;
345 if (!memcmp(path, "//", 2)) {
346 char *slash = strchr(path + 2, '/');
348 int nr = slash - path - 2;
349 memmove(path, path+2, nr);
351 protocol = get_protocol(url);
358 if (protocol == PROTO_GIT)
359 return git_tcp_connect(fd, prog, host, path);
361 if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
362 die("unable to create pipe pair for communication");
365 snprintf(command, sizeof(command), "%s %s", prog,
367 dup2(pipefd[1][0], 0);
368 dup2(pipefd[0][1], 1);
373 if (protocol == PROTO_SSH)
374 execlp("ssh", "ssh", host, command, NULL);
376 execlp("sh", "sh", "-c", command, NULL);
379 fd[0] = pipefd[0][0];
380 fd[1] = pipefd[1][1];
386 int finish_connect(pid_t pid)
391 ret = waitpid(pid, NULL, 0);