#include "cache.h"
+#include "pkt-line.h"
+#include "quote.h"
#include <sys/wait.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <netdb.h>
/*
- * First, make it shell-safe. We do this by just disallowing any
- * special characters. Somebody who cares can do escaping and let
- * through the rest. But since we're doing to feed this to ssh as
- * a command line, we're going to be pretty damn anal for now.
+ * Read all the refs from the other end
*/
-static char *shell_safe(char *url)
+struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match)
{
- char *n = url;
- unsigned char c;
- static const char flags[256] = {
- ['0'...'9'] = 1,
- ['a'...'z'] = 1,
- ['A'...'Z'] = 1,
- ['.'] = 1, ['/'] = 1,
- ['-'] = 1, ['+'] = 1,
- [':'] = 1
- };
-
- while ((c = *n++) != 0) {
- if (flags[c] != 1)
- die("I don't like '%c'. Sue me.", c);
+ *list = NULL;
+ for (;;) {
+ struct ref *ref;
+ unsigned char old_sha1[20];
+ static char buffer[1000];
+ char *name;
+ int len;
+
+ len = packet_read_line(in, buffer, sizeof(buffer));
+ if (!len)
+ break;
+ if (buffer[len-1] == '\n')
+ buffer[--len] = 0;
+
+ if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
+ die("protocol error: expected sha/ref, got '%s'", buffer);
+ name = buffer + 41;
+ if (nr_match && !path_match(name, nr_match, match))
+ continue;
+ ref = xmalloc(sizeof(*ref) + len - 40);
+ memcpy(ref->old_sha1, old_sha1, 20);
+ memset(ref->new_sha1, 0, 20);
+ memcpy(ref->name, buffer + 41, len - 40);
+ ref->next = NULL;
+ *list = ref;
+ list = &ref->next;
+ }
+ return list;
+}
+
+int get_ack(int fd, unsigned char *result_sha1)
+{
+ static char line[1000];
+ int len = packet_read_line(fd, line, sizeof(line));
+
+ if (!len)
+ die("git-fetch-pack: expected ACK/NAK, got EOF");
+ if (line[len-1] == '\n')
+ line[--len] = 0;
+ if (!strcmp(line, "NAK"))
+ return 0;
+ if (!strncmp(line, "ACK ", 3)) {
+ if (!get_sha1_hex(line+4, result_sha1))
+ return 1;
}
- return url;
+ die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
+}
+
+int path_match(const char *path, int nr, char **match)
+{
+ int i;
+ int pathlen = strlen(path);
+
+ for (i = 0; i < nr; i++) {
+ char *s = match[i];
+ int len = strlen(s);
+
+ if (!len || len > pathlen)
+ continue;
+ if (memcmp(path + pathlen - len, s, len))
+ continue;
+ if (pathlen > len && path[pathlen - len - 1] != '/')
+ continue;
+ *s = 0;
+ return 1;
+ }
+ return 0;
+}
+
+enum protocol {
+ PROTO_LOCAL = 1,
+ PROTO_SSH,
+ PROTO_GIT,
+};
+
+static enum protocol get_protocol(const char *name)
+{
+ if (!strcmp(name, "ssh"))
+ return PROTO_SSH;
+ if (!strcmp(name, "git"))
+ return PROTO_GIT;
+ die("I don't handle protocol '%s'", name);
+}
+
+static void lookup_host(const char *host, struct sockaddr *in)
+{
+ struct addrinfo *res;
+ int ret;
+
+ ret = getaddrinfo(host, NULL, NULL, &res);
+ if (ret)
+ die("Unable to look up %s (%s)", host, gai_strerror(ret));
+ *in = *res->ai_addr;
+ freeaddrinfo(res);
+}
+
+static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
+{
+ struct sockaddr addr;
+ int port = DEFAULT_GIT_PORT, sockfd;
+ char *colon;
+
+ colon = strchr(host, ':');
+ if (colon) {
+ char *end;
+ unsigned long n = strtoul(colon+1, &end, 0);
+ if (colon[1] && !*end) {
+ *colon = 0;
+ port = n;
+ }
+ }
+
+ lookup_host(host, &addr);
+ ((struct sockaddr_in *)&addr)->sin_port = htons(port);
+
+ sockfd = socket(PF_INET, SOCK_STREAM, IPPROTO_IP);
+ if (sockfd < 0)
+ die("unable to create socket (%s)", strerror(errno));
+ if (connect(sockfd, (void *)&addr, sizeof(addr)) < 0)
+ die("unable to connect (%s)", strerror(errno));
+ fd[0] = sockfd;
+ fd[1] = sockfd;
+ packet_write(sockfd, "%s %s\n", prog, path);
+ return 0;
}
/*
int git_connect(int fd[2], char *url, const char *prog)
{
char command[1024];
- const char *host, *path;
+ char *host, *path;
char *colon;
int pipefd[2][2];
pid_t pid;
+ enum protocol protocol;
- url = shell_safe(url);
host = NULL;
path = url;
colon = strchr(url, ':');
+ protocol = PROTO_LOCAL;
if (colon) {
*colon = 0;
host = url;
path = colon+1;
+ protocol = PROTO_SSH;
+ if (!memcmp(path, "//", 2)) {
+ char *slash = strchr(path + 2, '/');
+ if (slash) {
+ int nr = slash - path - 2;
+ memmove(path, path+2, nr);
+ path[nr] = 0;
+ protocol = get_protocol(url);
+ host = path;
+ path = slash;
+ }
+ }
}
- snprintf(command, sizeof(command), "%s %s", prog, path);
+
+ if (protocol == PROTO_GIT)
+ return git_tcp_connect(fd, prog, host, path);
+
if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
die("unable to create pipe pair for communication");
pid = fork();
if (!pid) {
+ snprintf(command, sizeof(command), "%s %s", prog,
+ sq_quote(path));
dup2(pipefd[1][0], 0);
dup2(pipefd[0][1], 1);
close(pipefd[0][0]);
close(pipefd[0][1]);
close(pipefd[1][0]);
close(pipefd[1][1]);
- if (host)
+ if (protocol == PROTO_SSH)
execlp("ssh", "ssh", host, command, NULL);
else
execlp("sh", "sh", "-c", command, NULL);
projects / git.git / blobdiff