116 struct socket {  struct
117 	short	so_type;		/* generic type, see socket.h */  argument
118 	short	so_options;		/* from socket call, see socket.h */  argument
123 	struct	socket *so_head;	/* back pointer to accept socket */  argument
130 	TAILQ_HEAD(, socket) so_incomp;	/* in-progress, incomplete */  argument
138 	 * Misc socket support  argument
146 	TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */  argument
150 	void	(*so_upcall) (struct socket *, void *, int);  argument
151 	void	*so_upcallarg;
152 	struct	ucred *so_cred;		/* user credentials */
154 	void	*so_emuldata;		/* private data for emulators */
155 	int	so_refs;		/* shutdown refs */
156 	int	so_reserved01;
157 	struct	so_accf {
161 	} *so_accf;
163 	struct netmsg_base so_clomsg;
187 #define	SS_ISCONNECTED		0x0002	/* socket connected to a peer */  argument