+ * Potentially enable agent forwarding.
+ */
+ if (cfg.agentfwd && agent_exists()) {
+ char proto[20], data[64];
+ logevent("Requesting OpenSSH-style agent forwarding");
+ x11_invent_auth(proto, sizeof(proto), data, sizeof(data));
+ ssh2_pkt_init(SSH2_MSG_CHANNEL_REQUEST);
+ ssh2_pkt_adduint32(mainchan->remoteid);
+ ssh2_pkt_addstring("auth-agent-req@openssh.com");
+ ssh2_pkt_addbool(1); /* want reply */
+ ssh2_pkt_send();
+
+ do {
+ crWaitUntilV(ispkt);
+ if (pktin.type == SSH2_MSG_CHANNEL_WINDOW_ADJUST) {
+ unsigned i = ssh2_pkt_getuint32();
+ struct ssh_channel *c;
+ c = find234(ssh_channels, &i, ssh_channelfind);
+ if (!c)
+ continue; /* nonexistent channel */
+ c->v2.remwindow += ssh2_pkt_getuint32();
+ }
+ } while (pktin.type == SSH2_MSG_CHANNEL_WINDOW_ADJUST);
+
+ if (pktin.type != SSH2_MSG_CHANNEL_SUCCESS) {
+ if (pktin.type != SSH2_MSG_CHANNEL_FAILURE) {
+ bombout(("Server got confused by agent forwarding request"));
+ crReturnV;
+ }
+ logevent("Agent forwarding refused");
+ } else {
+ logevent("Agent forwarding enabled");
+ ssh_agentfwd_enabled = TRUE;
+ }
+ }
+
+ /*