X-Git-Url: https://git.verplant.org/?a=blobdiff_plain;f=connect.c;h=f01b547574636d109f14c791287e6f4e52502de2;hb=f170e4b39d87365cda17b80436ba6db4a2044e88;hp=60b87f5867eaed8240d943b83dd7a5032ed5f89b;hpb=f71925983ddc365c167559ecc623f2c000607cda;p=git.git

diff --git a/connect.c b/connect.c
index 60b87f58..f01b5475 100644
--- a/connect.c
+++ b/connect.c
@@ -1,30 +1,106 @@
 #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.
- */
-static char *shell_safe(char *url)
+int get_ack(int fd, unsigned char *result_sha1)
 {
-	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);
+	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;
 }
 
 /*
@@ -33,32 +109,50 @@ static char *shell_safe(char *url)
 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);