#include "refs.h"
#include "run-command.h"
#include "remote.h"
+#include "url.h"
static char *server_capabilities;
len -= 5;
/* REF_NORMAL means that we don't want the magic fake tag refs */
- if ((flags & REF_NORMAL) && check_ref_format(name) < 0)
+ if ((flags & REF_NORMAL) && check_refname_format(name, 0))
return 0;
/* REF_HEADS means that we want regular branch heads */
return !(flags & ~REF_NORMAL);
}
+int check_ref_type(const struct ref *ref, int flags)
+{
+ return check_ref(ref->name, strlen(ref->name), flags);
+}
+
+static void add_extra_have(struct extra_have_objects *extra, unsigned char *sha1)
+{
+ ALLOC_GROW(extra->array, extra->nr + 1, extra->alloc);
+ hashcpy(&(extra->array[extra->nr][0]), sha1);
+ extra->nr++;
+}
+
+static void die_initial_contact(int got_at_least_one_head)
+{
+ if (got_at_least_one_head)
+ die("The remote end hung up upon initial contact");
+ else
+ die("Could not read from remote repository.\n\n"
+ "Please make sure you have the correct access rights\n"
+ "and the repository exists.");
+}
+
/*
* Read all the refs from the other end
*/
struct ref **get_remote_heads(int in, struct ref **list,
- int nr_match, char **match,
- unsigned int flags)
+ unsigned int flags,
+ struct extra_have_objects *extra_have)
{
+ int got_at_least_one_head = 0;
+
*list = NULL;
for (;;) {
struct ref *ref;
char *name;
int len, name_len;
- len = packet_read_line(in, buffer, sizeof(buffer));
+ len = packet_read(in, buffer, sizeof(buffer));
+ if (len < 0)
+ die_initial_contact(got_at_least_one_head);
+
if (!len)
break;
if (buffer[len-1] == '\n')
buffer[--len] = 0;
+ if (len > 4 && !prefixcmp(buffer, "ERR "))
+ die("remote error: %s", buffer + 4);
+
if (len < 42 || get_sha1_hex(buffer, old_sha1) || buffer[40] != ' ')
die("protocol error: expected sha/ref, got '%s'", buffer);
name = buffer + 41;
name_len = strlen(name);
if (len != name_len + 41) {
- if (server_capabilities)
- free(server_capabilities);
+ free(server_capabilities);
server_capabilities = xstrdup(name + name_len + 1);
}
- if (!check_ref(name, name_len, flags))
+ if (extra_have &&
+ name_len == 5 && !memcmp(".have", name, 5)) {
+ add_extra_have(extra_have, old_sha1);
continue;
- if (nr_match && !path_match(name, nr_match, match))
+ }
+
+ if (!check_ref(name, name_len, flags))
continue;
- ref = alloc_ref(name_len + 1);
+ ref = alloc_ref(buffer + 41);
hashcpy(ref->old_sha1, old_sha1);
- memcpy(ref->name, buffer + 41, name_len + 1);
*list = ref;
list = &ref->next;
+ got_at_least_one_head = 1;
}
return list;
}
-int server_supports(const char *feature)
+const char *parse_feature_value(const char *feature_list, const char *feature, int *lenp)
{
- return server_capabilities &&
- strstr(server_capabilities, feature) != NULL;
-}
+ int len;
-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 (!prefixcmp(line, "ACK ")) {
- if (!get_sha1_hex(line+4, result_sha1)) {
- if (strstr(line+45, "continue"))
- return 2;
- return 1;
+ if (!feature_list)
+ return NULL;
+
+ len = strlen(feature);
+ while (*feature_list) {
+ const char *found = strstr(feature_list, feature);
+ if (!found)
+ return NULL;
+ if (feature_list == found || isspace(found[-1])) {
+ const char *value = found + len;
+ /* feature with no value (e.g., "thin-pack") */
+ if (!*value || isspace(*value)) {
+ if (lenp)
+ *lenp = 0;
+ return value;
+ }
+ /* feature with a value (e.g., "agent=git/1.2.3") */
+ else if (*value == '=') {
+ value++;
+ if (lenp)
+ *lenp = strcspn(value, " \t\n");
+ return value;
+ }
+ /*
+ * otherwise we matched a substring of another feature;
+ * keep looking
+ */
}
+ feature_list = found + 1;
}
- die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
+ return NULL;
}
-int path_match(const char *path, int nr, char **match)
+int parse_feature_request(const char *feature_list, const char *feature)
{
- int i;
- int pathlen = strlen(path);
+ return !!parse_feature_value(feature_list, feature, NULL);
+}
- for (i = 0; i < nr; i++) {
- char *s = match[i];
- int len = strlen(s);
+const char *server_feature_value(const char *feature, int *len)
+{
+ return parse_feature_value(server_capabilities, feature, len);
+}
- if (!len || len > pathlen)
- continue;
- if (memcmp(path + pathlen - len, s, len))
- continue;
- if (pathlen > len && path[pathlen - len - 1] != '/')
- continue;
- *s = 0;
- return (i + 1);
- }
- return 0;
+int server_supports(const char *feature)
+{
+ return !!server_feature_value(feature, NULL);
}
enum protocol {
PROTO_LOCAL = 1,
PROTO_SSH,
- PROTO_GIT,
+ PROTO_GIT
};
static enum protocol get_protocol(const char *name)
#define STR_(s) # s
#define STR(s) STR_(s)
+static void get_host_and_port(char **host, const char **port)
+{
+ char *colon, *end;
+
+ if (*host[0] == '[') {
+ end = strchr(*host + 1, ']');
+ if (end) {
+ *end = 0;
+ end++;
+ (*host)++;
+ } else
+ end = *host;
+ } else
+ end = *host;
+ colon = strchr(end, ':');
+
+ if (colon) {
+ *colon = 0;
+ *port = colon + 1;
+ }
+}
+
+static void enable_keepalive(int sockfd)
+{
+ int ka = 1;
+
+ if (setsockopt(sockfd, SOL_SOCKET, SO_KEEPALIVE, &ka, sizeof(ka)) < 0)
+ fprintf(stderr, "unable to set SO_KEEPALIVE on socket: %s\n",
+ strerror(errno));
+}
+
#ifndef NO_IPV6
static const char *ai_name(const struct addrinfo *ai)
{
- static char addr[INET_ADDRSTRLEN];
- if ( AF_INET == ai->ai_family ) {
- struct sockaddr_in *in;
- in = (struct sockaddr_in *)ai->ai_addr;
- inet_ntop(ai->ai_family, &in->sin_addr, addr, sizeof(addr));
- } else if ( AF_INET6 == ai->ai_family ) {
- struct sockaddr_in6 *in;
- in = (struct sockaddr_in6 *)ai->ai_addr;
- inet_ntop(ai->ai_family, &in->sin6_addr, addr, sizeof(addr));
- } else {
+ static char addr[NI_MAXHOST];
+ if (getnameinfo(ai->ai_addr, ai->ai_addrlen, addr, sizeof(addr), NULL, 0,
+ NI_NUMERICHOST) != 0)
strcpy(addr, "(unknown)");
- }
+
return addr;
}
*/
static int git_tcp_connect_sock(char *host, int flags)
{
- int sockfd = -1, saved_errno = 0;
- char *colon, *end;
+ struct strbuf error_message = STRBUF_INIT;
+ int sockfd = -1;
const char *port = STR(DEFAULT_GIT_PORT);
struct addrinfo hints, *ai0, *ai;
int gai;
int cnt = 0;
- if (host[0] == '[') {
- end = strchr(host + 1, ']');
- if (end) {
- *end = 0;
- end++;
- host++;
- } else
- end = host;
- } else
- end = host;
- colon = strchr(end, ':');
-
- if (colon) {
- *colon = 0;
- port = colon + 1;
- if (!*port)
- port = "<none>";
- }
+ get_host_and_port(&host, &port);
+ if (!*port)
+ port = "<none>";
memset(&hints, 0, sizeof(hints));
hints.ai_socktype = SOCK_STREAM;
if (flags & CONNECT_VERBOSE)
fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
- for (ai0 = ai; ai; ai = ai->ai_next) {
+ for (ai0 = ai; ai; ai = ai->ai_next, cnt++) {
sockfd = socket(ai->ai_family,
ai->ai_socktype, ai->ai_protocol);
- if (sockfd < 0) {
- saved_errno = errno;
- continue;
- }
- if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
- saved_errno = errno;
- fprintf(stderr, "%s[%d: %s]: errno=%s\n",
- host,
- cnt,
- ai_name(ai),
- strerror(saved_errno));
- close(sockfd);
+ if ((sockfd < 0) ||
+ (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0)) {
+ strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
+ host, cnt, ai_name(ai), strerror(errno));
+ if (0 <= sockfd)
+ close(sockfd);
sockfd = -1;
continue;
}
freeaddrinfo(ai0);
if (sockfd < 0)
- die("unable to connect a socket (%s)", strerror(saved_errno));
+ die("unable to connect to %s:\n%s", host, error_message.buf);
+
+ enable_keepalive(sockfd);
if (flags & CONNECT_VERBOSE)
fprintf(stderr, "done.\n");
+ strbuf_release(&error_message);
+
return sockfd;
}
*/
static int git_tcp_connect_sock(char *host, int flags)
{
- int sockfd = -1, saved_errno = 0;
- char *colon, *end;
- char *port = STR(DEFAULT_GIT_PORT), *ep;
+ struct strbuf error_message = STRBUF_INIT;
+ int sockfd = -1;
+ const char *port = STR(DEFAULT_GIT_PORT);
+ char *ep;
struct hostent *he;
struct sockaddr_in sa;
char **ap;
unsigned int nport;
int cnt;
- if (host[0] == '[') {
- end = strchr(host + 1, ']');
- if (end) {
- *end = 0;
- end++;
- host++;
- } else
- end = host;
- } else
- end = host;
- colon = strchr(end, ':');
-
- if (colon) {
- *colon = 0;
- port = colon + 1;
- }
+ get_host_and_port(&host, &port);
if (flags & CONNECT_VERBOSE)
fprintf(stderr, "Looking up %s ... ", host);
/* Not numeric */
struct servent *se = getservbyname(port,"tcp");
if ( !se )
- die("Unknown port %s\n", port);
+ die("Unknown port %s", port);
nport = se->s_port;
}
fprintf(stderr, "done.\nConnecting to %s (port %s) ... ", host, port);
for (cnt = 0, ap = he->h_addr_list; *ap; ap++, cnt++) {
- sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
- if (sockfd < 0) {
- saved_errno = errno;
- continue;
- }
-
memset(&sa, 0, sizeof sa);
sa.sin_family = he->h_addrtype;
sa.sin_port = htons(nport);
memcpy(&sa.sin_addr, *ap, he->h_length);
- if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
- saved_errno = errno;
- fprintf(stderr, "%s[%d: %s]: errno=%s\n",
+ sockfd = socket(he->h_addrtype, SOCK_STREAM, 0);
+ if ((sockfd < 0) ||
+ connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
+ strbuf_addf(&error_message, "%s[%d: %s]: errno=%s\n",
host,
cnt,
inet_ntoa(*(struct in_addr *)&sa.sin_addr),
- strerror(saved_errno));
- close(sockfd);
+ strerror(errno));
+ if (0 <= sockfd)
+ close(sockfd);
sockfd = -1;
continue;
}
}
if (sockfd < 0)
- die("unable to connect a socket (%s)", strerror(saved_errno));
+ die("unable to connect to %s:\n%s", host, error_message.buf);
+
+ enable_keepalive(sockfd);
if (flags & CONNECT_VERBOSE)
fprintf(stderr, "done.\n");
static char *git_proxy_command;
-static const char *rhost_name;
-static int rhost_len;
-static int git_proxy_command_options(const char *var, const char *value)
+static int git_proxy_command_options(const char *var, const char *value,
+ void *cb)
{
if (!strcmp(var, "core.gitproxy")) {
const char *for_pos;
int matchlen = -1;
int hostlen;
+ const char *rhost_name = cb;
+ int rhost_len = strlen(rhost_name);
if (git_proxy_command)
return 0;
+ if (!value)
+ return config_error_nonbool(var);
/* [core]
* ;# matches www.kernel.org as well
* gitproxy = netcatter-1 for kernel.org
return 0;
}
- return git_default_config(var, value);
+ return git_default_config(var, value, cb);
}
static int git_use_proxy(const char *host)
{
- rhost_name = host;
- rhost_len = strlen(host);
git_proxy_command = getenv("GIT_PROXY_COMMAND");
- git_config(git_proxy_command_options);
- rhost_name = NULL;
+ git_config(git_proxy_command_options, (void*)host);
return (git_proxy_command && *git_proxy_command);
}
-static void git_proxy_connect(int fd[2], char *host)
+static struct child_process *git_proxy_connect(int fd[2], char *host)
{
const char *port = STR(DEFAULT_GIT_PORT);
- char *colon, *end;
- const char *argv[4];
- struct child_process proxy;
+ const char **argv;
+ struct child_process *proxy;
- if (host[0] == '[') {
- end = strchr(host + 1, ']');
- if (end) {
- *end = 0;
- end++;
- host++;
- } else
- end = host;
- } else
- end = host;
- colon = strchr(end, ':');
-
- if (colon) {
- *colon = 0;
- port = colon + 1;
- }
+ get_host_and_port(&host, &port);
+ argv = xmalloc(sizeof(*argv) * 4);
argv[0] = git_proxy_command;
argv[1] = host;
argv[2] = port;
argv[3] = NULL;
- memset(&proxy, 0, sizeof(proxy));
- proxy.argv = argv;
- proxy.in = -1;
- proxy.out = -1;
- if (start_command(&proxy))
+ proxy = xcalloc(1, sizeof(*proxy));
+ proxy->argv = argv;
+ proxy->in = -1;
+ proxy->out = -1;
+ if (start_command(proxy))
die("cannot start proxy %s", argv[0]);
- fd[0] = proxy.out; /* read from proxy stdout */
- fd[1] = proxy.in; /* write to proxy stdin */
+ fd[0] = proxy->out; /* read from proxy stdout */
+ fd[1] = proxy->in; /* write to proxy stdin */
+ return proxy;
}
#define MAX_CMD_LEN 1024
-char *get_port(char *host)
+static char *get_port(char *host)
{
char *end;
char *p = strchr(host, ':');
if (p) {
- strtol(p+1, &end, 10);
- if (*end == '\0') {
+ long port = strtol(p + 1, &end, 10);
+ if (end != p + 1 && *end == '\0' && 0 <= port && port < 65536) {
*p = '\0';
return p+1;
}
return NULL;
}
+static struct child_process no_fork;
+
/*
- * This returns NULL if the transport protocol does not need fork(2), or a
- * struct child_process object if it does. Once done, finish the connection
- * with finish_connect() with the value returned from this function
- * (it is safe to call finish_connect() with NULL to support the former
- * case).
+ * This returns a dummy child_process if the transport protocol does not
+ * need fork(2), or a struct child_process object if it does. Once done,
+ * finish the connection with finish_connect() with the value returned from
+ * this function (it is safe to call finish_connect() with NULL to support
+ * the former case).
*
- * If it returns, the connect is successful; it just dies on errors.
+ * If it returns, the connect is successful; it just dies on errors (this
+ * will hopefully be changed in a libification effort, to return NULL when
+ * the connection failed).
*/
-struct child_process *git_connect(int fd[2], char *url,
+struct child_process *git_connect(int fd[2], const char *url_orig,
const char *prog, int flags)
{
- char *host, *path = url;
+ char *url;
+ char *host, *path;
char *end;
int c;
- int pipefd[2][2];
- struct child_process *conn;
+ struct child_process *conn = &no_fork;
enum protocol protocol = PROTO_LOCAL;
int free_path = 0;
char *port = NULL;
+ const char **arg;
+ struct strbuf cmd;
/* Without this we cannot rely on waitpid() to tell
* what happened to our children.
*/
signal(SIGCHLD, SIG_DFL);
+ if (is_url(url_orig))
+ url = url_decode(url_orig);
+ else
+ url = xstrdup(url_orig);
+
host = strstr(url, "://");
- if(host) {
+ if (host) {
*host = '\0';
protocol = get_protocol(url);
host += 3;
c = ':';
}
+ /*
+ * Don't do destructive transforms with git:// as that
+ * protocol code does '[]' unwrapping of its own.
+ */
if (host[0] == '[') {
end = strchr(host + 1, ']');
if (end) {
- *end = 0;
+ if (protocol != PROTO_GIT) {
+ *end = 0;
+ host++;
+ }
end++;
- host++;
} else
end = host;
} else
end = host;
path = strchr(end, c);
- if (path) {
+ if (path && !has_dos_drive_prefix(end)) {
if (c == ':') {
protocol = PROTO_SSH;
*path++ = '\0';
* Add support for ssh port: ssh://host.xy:<port>/...
*/
if (protocol == PROTO_SSH && host != url)
- port = get_port(host);
+ port = get_port(end);
if (protocol == PROTO_GIT) {
/* These underlying connection commands die() if they
*/
char *target_host = xstrdup(host);
if (git_use_proxy(host))
- git_proxy_connect(fd, host);
+ conn = git_proxy_connect(fd, host);
else
git_tcp_connect(fd, host, flags);
/*
* Separate original protocol components prog and path
- * from extended components with a NUL byte.
+ * from extended host header with a NUL byte.
+ *
+ * Note: Do not add any other headers here! Doing so
+ * will cause older git-daemon servers to crash.
*/
packet_write(fd[1],
"%s %s%chost=%s%c",
prog, path, 0,
target_host, 0);
free(target_host);
+ free(url);
if (free_path)
free(path);
- return NULL;
+ return conn;
}
- if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
- die("unable to create pipe pair for communication");
conn = xcalloc(1, sizeof(*conn));
- conn->pid = fork();
- if (conn->pid < 0)
- die("unable to fork");
- if (!conn->pid) {
- struct strbuf cmd;
-
- strbuf_init(&cmd, MAX_CMD_LEN);
- strbuf_addstr(&cmd, prog);
- strbuf_addch(&cmd, ' ');
- sq_quote_buf(&cmd, path);
- if (cmd.len >= MAX_CMD_LEN)
- die("command line too long");
-
- 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 (protocol == PROTO_SSH) {
- const char *ssh, *ssh_basename;
- ssh = getenv("GIT_SSH");
- if (!ssh) ssh = "ssh";
- ssh_basename = strrchr(ssh, '/');
- if (!ssh_basename)
- ssh_basename = ssh;
- else
- ssh_basename++;
- if (!port)
- execlp(ssh, ssh_basename, host, cmd.buf, NULL);
- else
- execlp(ssh, ssh_basename, "-p", port, host,
- cmd.buf, NULL);
- }
- else {
- unsetenv(ALTERNATE_DB_ENVIRONMENT);
- unsetenv(DB_ENVIRONMENT);
- unsetenv(GIT_DIR_ENVIRONMENT);
- unsetenv(GIT_WORK_TREE_ENVIRONMENT);
- unsetenv(GRAFT_ENVIRONMENT);
- unsetenv(INDEX_ENVIRONMENT);
- execlp("sh", "sh", "-c", cmd.buf, NULL);
+ strbuf_init(&cmd, MAX_CMD_LEN);
+ strbuf_addstr(&cmd, prog);
+ strbuf_addch(&cmd, ' ');
+ sq_quote_buf(&cmd, path);
+ if (cmd.len >= MAX_CMD_LEN)
+ die("command line too long");
+
+ conn->in = conn->out = -1;
+ conn->argv = arg = xcalloc(7, sizeof(*arg));
+ if (protocol == PROTO_SSH) {
+ const char *ssh = getenv("GIT_SSH");
+ int putty = ssh && strcasestr(ssh, "plink");
+ if (!ssh) ssh = "ssh";
+
+ *arg++ = ssh;
+ if (putty && !strcasestr(ssh, "tortoiseplink"))
+ *arg++ = "-batch";
+ if (port) {
+ /* P is for PuTTY, p is for OpenSSH */
+ *arg++ = putty ? "-P" : "-p";
+ *arg++ = port;
}
- die("exec failed");
+ *arg++ = host;
}
- fd[0] = pipefd[0][0];
- fd[1] = pipefd[1][1];
- close(pipefd[0][1]);
- close(pipefd[1][0]);
+ else {
+ /* remove repo-local variables from the environment */
+ conn->env = local_repo_env;
+ conn->use_shell = 1;
+ }
+ *arg++ = cmd.buf;
+ *arg = NULL;
+
+ if (start_command(conn))
+ die("unable to fork");
+
+ fd[0] = conn->out; /* read from child's stdout */
+ fd[1] = conn->in; /* write to child's stdin */
+ strbuf_release(&cmd);
+ free(url);
if (free_path)
free(path);
return conn;
}
+int git_connection_is_socket(struct child_process *conn)
+{
+ return conn == &no_fork;
+}
+
int finish_connect(struct child_process *conn)
{
- if (!conn)
+ int code;
+ if (!conn || git_connection_is_socket(conn))
return 0;
- while (waitpid(conn->pid, NULL, 0) < 0) {
- if (errno != EINTR)
- return -1;
- }
+ code = finish_command(conn);
+ free(conn->argv);
free(conn);
- return 0;
+ return code;
}