network: implement multi_ack for the git transport

1 files changed, 13 insertions, 5 deletions

diff --git a/src/pkt.c b/src/pkt.c
index e003b97e2..e60e30d5b 100644
--- a/src/pkt.c
+++ b/src/pkt.c
@@ -283,20 +283,28 @@ int git_pkt_buffer_flush(git_buf *buf)
 
 static int buffer_want_with_caps(git_remote_head *head, git_transport_caps *caps, git_buf *buf)
 {
-	char capstr[20];
+	git_buf str = GIT_BUF_INIT;
 	char oid[GIT_OID_HEXSZ +1] = {0};
 	unsigned int len;
 
 	if (caps->ofs_delta)
-		strncpy(capstr, GIT_CAP_OFS_DELTA, sizeof(capstr));
+		git_buf_puts(&str, GIT_CAP_OFS_DELTA " ");
+
+	if (caps->multi_ack)
+		git_buf_puts(&str, GIT_CAP_MULTI_ACK " ");
+
+	if (git_buf_oom(&str))
+		return -1;
 
 	len = (unsigned int)
 		(strlen("XXXXwant ") + GIT_OID_HEXSZ + 1 /* NUL */ +
-		 strlen(capstr) + 1 /* LF */);
+		 git_buf_len(&str) + 1 /* LF */);
 	git_buf_grow(buf, git_buf_len(buf) + len);
-
 	git_oid_fmt(oid, &head->oid);
-	return git_buf_printf(buf, "%04xwant %s %s\n", len, oid, capstr);
+	git_buf_printf(buf, "%04xwant %s %s\n", len, oid, git_buf_cstr(&str));
+	git_buf_free(&str);
+
+	return git_buf_oom(buf);
 }
 
 /*