127 struct socket {  struct
129 	short	so_type;		/* (a) generic type, see socket.h */  argument
130 	short	so_options;		/* from socket call, see socket.h */  argument
139  * If so_head is 0, socket is not related to an accept.  argument
147 	struct	socket *so_head;	/* (e) back pointer to listen socket */  argument
162 	TAILQ_HEAD(, aiocblist) so_aiojobq; /* AIO ops waiting on socket */  argument
178 		short	sb_state;	/* (c/d) socket state on sockbuf */  argument
199 …         (64*1024*2)    /*Aligning so->so_rcv.sb_hiwat with the receive buffer size of raw socket*/  argument
212 	void	(*so_upcall)(struct socket *, void *, int);  argument
215 	struct	label *so_label;	/* (b) MAC label for socket */  argument
236  * fields associated with multiple sockets.  This allows us to  argument