X-Git-Url: https://git.distorted.org.uk/u/mdw/putty/blobdiff_plain/a52e493dbea32c7b794988715d27c38fb1716f09..3d71de0bbe945fba6ec4e77eb56248e75419fbb4:/ssh.c

diff --git a/ssh.c b/ssh.c
index 72536c87..0738b309 100644
--- a/ssh.c
+++ b/ssh.c
@@ -1587,7 +1587,7 @@ static void ssh_pkt_ensure(struct Packet *pkt, int length)
 {
     if (pkt->maxlen < length) {
 	unsigned char *body = pkt->body;
-	int offset = body ? pkt->data - body : 0;
+	int offset = body ? body - pkt->data : 0;
 	pkt->maxlen = length + 256;
 	pkt->data = sresize(pkt->data, pkt->maxlen + APIEXTRA, unsigned char);
 	if (body) pkt->body = pkt->data + offset;
@@ -1697,10 +1697,10 @@ static struct Packet *ssh1_pkt_init(int pkt_type)
 static struct Packet *ssh2_pkt_init(int pkt_type)
 {
     struct Packet *pkt = ssh_new_packet();
-    pkt->length = 5;
+    pkt->length = 5; /* space for packet length + padding length */
     pkt->forcepad = 0;
     ssh_pkt_addbyte(pkt, (unsigned char) pkt_type);
-    pkt->body = pkt->data + pkt->length;
+    pkt->body = pkt->data + pkt->length; /* after packet type */
     return pkt;
 }