X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=connect.c;h=52d709e58d53f053ec00bfb9f31501684cbaf0e5;hb=ae448e3854d8b6e7e37aa88fa3917f5dd97f3210;hp=b157cf1cc718bbd7b8f4598b2dcb3a7ba92bb8e3;hpb=09dea56568f90952b87d29353aca53359157cd29;p=git.git

diff --git a/connect.c b/connect.c
index b157cf1c..52d709e5 100644
--- a/connect.c
+++ b/connect.c
@@ -1,16 +1,21 @@
+#include "git-compat-util.h"
 #include "cache.h"
 #include "pkt-line.h"
 #include "quote.h"
+#include "refs.h"
 #include <sys/wait.h>
 #include <sys/socket.h>
 #include <netinet/in.h>
 #include <arpa/inet.h>
 #include <netdb.h>
 
+static char *server_capabilities = NULL;
+
 /*
  * Read all the refs from the other end
  */
-struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **match)
+struct ref **get_remote_heads(int in, struct ref **list,
+			      int nr_match, char **match, int ignore_funny)
 {
 	*list = NULL;
 	for (;;) {
@@ -18,7 +23,7 @@ struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **ma
 		unsigned char old_sha1[20];
 		static char buffer[1000];
 		char *name;
-		int len;
+		int len, name_len;
 
 		len = packet_read_line(in, buffer, sizeof(buffer));
 		if (!len)
@@ -29,6 +34,18 @@ struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **ma
 		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);
+			server_capabilities = strdup(name + name_len + 1);
+		}
+
+		if (ignore_funny && 45 < len && !memcmp(name, "refs/", 5) &&
+		    check_ref_format(name + 5))
+			continue;
+
 		if (nr_match && !path_match(name, nr_match, match))
 			continue;
 		ref = xcalloc(1, sizeof(*ref) + len - 40);
@@ -40,6 +57,12 @@ struct ref **get_remote_heads(int in, struct ref **list, int nr_match, char **ma
 	return list;
 }
 
+int server_supports(const char *feature)
+{
+	return server_capabilities &&
+		strstr(server_capabilities, feature) != NULL;
+}
+
 int get_ack(int fd, unsigned char *result_sha1)
 {
 	static char line[1000];
@@ -51,9 +74,12 @@ int get_ack(int fd, unsigned char *result_sha1)
 		line[--len] = 0;
 	if (!strcmp(line, "NAK"))
 		return 0;
-	if (!strncmp(line, "ACK ", 3)) {
-		if (!get_sha1_hex(line+4, result_sha1))
+	if (!strncmp(line, "ACK ", 4)) {
+		if (!get_sha1_hex(line+4, result_sha1)) {
+			if (strstr(line+45, "continue"))
+				return 2;
 			return 1;
+		}
 	}
 	die("git-fetch_pack: expected ACK/NAK, got '%s'", line);
 }
@@ -74,7 +100,7 @@ int path_match(const char *path, int nr, char **match)
 		if (pathlen > len && path[pathlen - len - 1] != '/')
 			continue;
 		*s = 0;
-		return 1;
+		return (i + 1);
 	}
 	return 0;
 }
@@ -284,6 +310,10 @@ static enum protocol get_protocol(const char *name)
 		return PROTO_SSH;
 	if (!strcmp(name, "git"))
 		return PROTO_GIT;
+	if (!strcmp(name, "git+ssh"))
+		return PROTO_SSH;
+	if (!strcmp(name, "ssh+git"))
+		return PROTO_SSH;
 	die("I don't handle protocol '%s'", name);
 }
 
@@ -292,7 +322,10 @@ static enum protocol get_protocol(const char *name)
 
 #ifndef NO_IPV6
 
-static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
+/*
+ * Returns a connected socket() fd, or else die()s.
+ */
+static int git_tcp_connect_sock(char *host)
 {
 	int sockfd = -1;
 	char *colon, *end;
@@ -326,7 +359,8 @@ static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
 		die("Unable to look up %s (%s)", host, gai_strerror(gai));
 
 	for (ai0 = ai; ai; ai = ai->ai_next) {
-		sockfd = socket(ai->ai_family, ai->ai_socktype, ai->ai_protocol);
+		sockfd = socket(ai->ai_family,
+				ai->ai_socktype, ai->ai_protocol);
 		if (sockfd < 0)
 			continue;
 		if (connect(sockfd, ai->ai_addr, ai->ai_addrlen) < 0) {
@@ -342,15 +376,15 @@ static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
 	if (sockfd < 0)
 		die("unable to connect a socket (%s)", strerror(errno));
 
-	fd[0] = sockfd;
-	fd[1] = sockfd;
-	packet_write(sockfd, "%s %s\n", prog, path);
-	return 0;
+	return sockfd;
 }
 
 #else /* NO_IPV6 */
 
-static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
+/*
+ * Returns a connected socket() fd, or else die()s.
+ */
+static int git_tcp_connect_sock(char *host)
 {
 	int sockfd = -1;
 	char *colon, *end;
@@ -377,7 +411,6 @@ static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
 		port = colon + 1;
 	}
 
-
 	he = gethostbyname(host);
 	if (!he)
 		die("Unable to look up %s (%s)", host, hstrerror(h_errno));
@@ -398,7 +431,7 @@ static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
 		memset(&sa, 0, sizeof sa);
 		sa.sin_family = he->h_addrtype;
 		sa.sin_port = htons(nport);
-		memcpy(&sa.sin_addr, ap, he->h_length);
+		memcpy(&sa.sin_addr, *ap, he->h_length);
 
 		if (connect(sockfd, (struct sockaddr *)&sa, sizeof sa) < 0) {
 			close(sockfd);
@@ -411,13 +444,128 @@ static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
 	if (sockfd < 0)
 		die("unable to connect a socket (%s)", strerror(errno));
 
+	return sockfd;
+}
+
+#endif /* NO_IPV6 */
+
+
+static void git_tcp_connect(int fd[2],
+			    const char *prog, char *host, char *path)
+{
+	int sockfd = git_tcp_connect_sock(host);
+
 	fd[0] = sockfd;
 	fd[1] = sockfd;
-	packet_write(sockfd, "%s %s\n", prog, path);
-	return 0;
 }
 
-#endif /* NO_IPV6 */
+
+static char *git_proxy_command = NULL;
+static const char *rhost_name = NULL;
+static int rhost_len;
+
+static int git_proxy_command_options(const char *var, const char *value)
+{
+	if (!strcmp(var, "core.gitproxy")) {
+		const char *for_pos;
+		int matchlen = -1;
+		int hostlen;
+
+		if (git_proxy_command)
+			return 0;
+		/* [core]
+		 * ;# matches www.kernel.org as well
+		 * gitproxy = netcatter-1 for kernel.org
+		 * gitproxy = netcatter-2 for sample.xz
+		 * gitproxy = netcatter-default
+		 */
+		for_pos = strstr(value, " for ");
+		if (!for_pos)
+			/* matches everybody */
+			matchlen = strlen(value);
+		else {
+			hostlen = strlen(for_pos + 5);
+			if (rhost_len < hostlen)
+				matchlen = -1;
+			else if (!strncmp(for_pos + 5,
+					  rhost_name + rhost_len - hostlen,
+					  hostlen) &&
+				 ((rhost_len == hostlen) ||
+				  rhost_name[rhost_len - hostlen -1] == '.'))
+				matchlen = for_pos - value;
+			else
+				matchlen = -1;
+		}
+		if (0 <= matchlen) {
+			/* core.gitproxy = none for kernel.org */
+			if (matchlen == 4 && 
+			    !memcmp(value, "none", 4))
+				matchlen = 0;
+			git_proxy_command = xmalloc(matchlen + 1);
+			memcpy(git_proxy_command, value, matchlen);
+			git_proxy_command[matchlen] = 0;
+		}
+		return 0;
+	}
+
+	return git_default_config(var, value);
+}
+
+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;
+	return (git_proxy_command && *git_proxy_command);
+}
+
+static void git_proxy_connect(int fd[2],
+			      const char *prog, char *host, char *path)
+{
+	char *port = STR(DEFAULT_GIT_PORT);
+	char *colon, *end;
+	int pipefd[2][2];
+	pid_t pid;
+
+	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 (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
+		die("unable to create pipe pair for communication");
+	pid = fork();
+	if (!pid) {
+		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]);
+		execlp(git_proxy_command, git_proxy_command, host, port, NULL);
+		die("exec failed");
+	}
+	if (pid < 0)
+		die("fork failed");
+	fd[0] = pipefd[0][0];
+	fd[1] = pipefd[1][1];
+	close(pipefd[0][1]);
+	close(pipefd[1][0]);
+}
 
 /*
  * Yeah, yeah, fixme. Need to pass in the heads etc.
@@ -425,40 +573,92 @@ static int git_tcp_connect(int fd[2], const char *prog, char *host, char *path)
 int git_connect(int fd[2], char *url, const char *prog)
 {
 	char command[1024];
-	char *host, *path;
-	char *colon;
+	char *host, *path = url;
+	char *end;
+	int c;
 	int pipefd[2][2];
 	pid_t pid;
-	enum protocol protocol;
-
-	host = NULL;
-	path = url;
-	colon = strchr(url, ':');
-	protocol = PROTO_LOCAL;
-	if (colon) {
-		*colon = 0;
+	enum protocol protocol = PROTO_LOCAL;
+	int free_path = 0;
+
+	host = strstr(url, "://");
+	if(host) {
+		*host = '\0';
+		protocol = get_protocol(url);
+		host += 3;
+		c = '/';
+	} else {
 		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;
-			}
+		c = ':';
+	}
+
+	if (host[0] == '[') {
+		end = strchr(host + 1, ']');
+		if (end) {
+			*end = 0;
+			end++;
+			host++;
+		} else
+			end = host;
+	} else
+		end = host;
+
+	path = strchr(end, c);
+	if (c == ':') {
+		if (path) {
+			protocol = PROTO_SSH;
+			*path++ = '\0';
+		} else
+			path = host;
+	}
+
+	if (!path || !*path)
+		die("No path specified. See 'man git-pull' for valid url syntax");
+
+	/*
+	 * null-terminate hostname and point path to ~ for URL's like this:
+	 *    ssh://host.xz/~user/repo
+	 */
+	if (protocol != PROTO_LOCAL && host != url) {
+		char *ptr = path;
+		if (path[1] == '~')
+			path++;
+		else {
+			path = strdup(ptr);
+			free_path = 1;
 		}
+
+		*ptr = '\0';
 	}
 
-	if (protocol == PROTO_GIT)
-		return git_tcp_connect(fd, prog, host, path);
+	if (protocol == PROTO_GIT) {
+		/* These underlying connection commands die() if they
+		 * cannot connect.
+		 */
+		char *target_host = strdup(host);
+		if (git_use_proxy(host))
+			git_proxy_connect(fd, prog, host, path);
+		else
+			git_tcp_connect(fd, prog, host, path);
+		/*
+		 * Separate original protocol components prog and path
+		 * from extended components with a NUL byte.
+		 */
+		packet_write(fd[1],
+			     "%s %s%chost=%s%c",
+			     prog, path, 0,
+			     target_host, 0);
+		free(target_host);
+		if (free_path)
+			free(path);
+		return 0;
+	}
 
 	if (pipe(pipefd[0]) < 0 || pipe(pipefd[1]) < 0)
 		die("unable to create pipe pair for communication");
 	pid = fork();
+	if (pid < 0)
+		die("unable to fork");
 	if (!pid) {
 		snprintf(command, sizeof(command), "%s %s", prog,
 			 sq_quote(path));
@@ -479,14 +679,22 @@ int git_connect(int fd[2], char *url, const char *prog)
 				ssh_basename++;
 			execlp(ssh, ssh_basename, host, command, NULL);
 		}
-		else
+		else {
+			unsetenv(ALTERNATE_DB_ENVIRONMENT);
+			unsetenv(DB_ENVIRONMENT);
+			unsetenv(GIT_DIR_ENVIRONMENT);
+			unsetenv(GRAFT_ENVIRONMENT);
+			unsetenv(INDEX_ENVIRONMENT);
 			execlp("sh", "sh", "-c", command, NULL);
+		}
 		die("exec failed");
-	}		
+	}
 	fd[0] = pipefd[0][0];
 	fd[1] = pipefd[1][1];
 	close(pipefd[0][1]);
 	close(pipefd[1][0]);
+	if (free_path)
+		free(path);
 	return pid;
 }