Passing Structures into Functions

There is a typedef at the very beginning of the code making SSSConn visible as a type (alias 'struct SSS_SOCKET').

typedef  struct SSS_SOCKET { 
    enum { READY, COMPLETE, CLOSE } state; 
    int fd; 
    int close; 
    INT8U rx_buffer; 
    INT8U *rx_rd_pos; /* position we've read up to */
    INT8U *rx_wr_pos; /* position we've written up to */
    } SSSConn;

struct SSS_SOCKET { 
    enum { READY, COMPLETE, CLOSE } state; 
    int fd; 
    int close; 
    INT8U rx_buffer; 
    INT8U *rx_rd_pos; /* position we've read up to */
    INT8U *rx_wr_pos; /* position we've written up to */
    } ;
typedef struct SSS_SOCKET SSSConn ;