started implementing scrollback buffer

server.c

@@ -98,6 +98,20 @@ static bool server_write_pty(Packet *pkt) {
 	return false;
 }
 
+static bool server_write_scrollback(Packet *pkt) {
+	print_packet("server-write-scrollback:", pkt);
+	size_t size = pkt->len;
+    uint32_t ii;
+    for (ii=0;ii<size;ii++) {
+        scrollback.buffer[scrollback.position++] = pkt->u.msg[ii];
+        if (scrollback.position>SCROLLBACK_SIZE) {
+            scrollback.position = 0;
+            scrollback.wrap = true;
+        }
+    }
+	return true;
+}
+
 static bool server_recv_packet(Client *c, Packet *pkt) {
 	if (recv_packet(c->socket, pkt)) {
 		print_packet("server-recv:", pkt);

splex.c

@@ -125,8 +125,16 @@ typedef struct {
     char next_session[2];
 } Server;
 
+#define SCROLLBACK_SIZE 8192
+typedef struct {
+    char buffer[SCROLLBACK_SIZE];
+    uint32_t position;
+    bool wrap;
+} Scrollback;
+
 static Server server = { .running = true, .exit_status = -1, .host = "@localhost" , .next_session = { '\0', '\0' } };
 static Client client;
+static Scrollback scrollback = { .buffer = {}, .position = 0, .wrap = false };
 static struct termios orig_term, cur_term;
 static bool has_term, alternate_buffer, quiet;