lcp_close
lcp_close(unit, "login failed");
lcp_close(unit, "peer refused to authenticate");
lcp_close(0, "No network protocols running");
lcp_close(unit, "Authentication failed");
lcp_close(unit, "Failed to authenticate ourselves to peer");
lcp_close(0, "No network protocols running");
lcp_close(0, "Link inactive");
lcp_close(f->unit, "Connect time expired"); /* Close connection */
lcp_close(us->us_unit, "No CBCP callback options available");
lcp_close(us->us_unit, "Call me back, please");
lcp_close(f->unit, "Loopback detected");
lcp_close(f->unit, close_message);
lcp_close, /* Called when the link goes down */
void lcp_close __P((int, char *));
lcp_close(0, "User request");