bsd/kern/uipc_syscalls.c

7  * as defined in and that are subject to the Apple Public Source License
9  * compliance with the License. The rights granted to you under the License
10  * may not be used to create, or enable the creation or redistribution of,
11  * unlawful or unlicensed copies of an Apple operating system, or to
48  *    may be used to endorse or promote products derived from this software
66  * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce
150  * System call interface to the socket abstraction.
430 	 * ready to be accepted. Remove it from the queue prior to
432 	 * block allowing another process to accept the connection
439 	/* unlock head to avoid deadlock with select, keep a ref on head */
444 	 * Pass the pre-accepted socket to the MAC framework. This is
460 	 * Pass the pre-accepted socket to any interested socket filter(s).
466 		/* Propagate socket filter's error code to the caller */
477 		 * Don't put this back on the socket like we used to, that
478 		 * just causes the client to spin. Drop the socket.
605 	 * Ask getsockaddr{_s} to not translate AF_UNSPEC to AF_INET
814 	struct sockaddr *to = NULL;
833 			error = getsockaddr(so, &to, mp->msg_name,
839 				to = (struct sockaddr *)&ss;
845 		AUDIT_ARG(sockaddr, vfs_context_cwd(vfs_context_current()), to);
862 	 * in an extra call to the MAC check function.
864 	if ( to != NULL &&
866 	    (error = mac_socket_check_send(kauth_cred_get(), so, to)) != 0)
871 	error = so->so_proto->pr_usrreqs->pru_sosend(so, to, uiop, 0, control,
884 	if (to != NULL && want_free)
885 		FREE(to, M_SONAME);
923 	msg.msg_name = uap->to;
925 	/* no need to set up msg_iov.  sendit uses uio_t we send it */
940 	 * Temporary workaround to let send() and recv() work over
1042 	/* allocate a uio large enough to hold the number of iovecs passed */
1146 	 * in an extra call to the MAC check function.
1306  *		instead of recv or recvfrom when attempting to read data
1346 	/* no need to set up msg_iov.  recvit uses uio_t we send it */
1360 	 * Temporary workaround to let send() and recv() work over
1444 	/* only need to copy if user process is not 64-bit */
1471 	/* allocate a uio large enough to hold the number of iovecs passed */
1852 	/* The fd's in the buffer must expand to be pointers, thus we need twice as much space */
1920 		 * Force sa_family to AF_INET on AF_INET sockets to handle
1957 		 * Force sa_family to AF_INET on AF_INET sockets to handle
1981 /* Macros to compute the number of mbufs needed depending on cluster size */
2016 	 * Try to allocate for the whole thing.  Since we want full control
2017 	 * over the buffer size and be able to accept partial result, we can't
2018 	 * use mbuf_allocpacket().  The logic below is similar to sosend().
2032 	 * may be short on mbufs, and we want to block until they are
2051  * Send a file specified by 'fd' and starting at 'offset' to a socket
2053  * *nbytes == 0. Optionally add a header and/or trailer to the socket
2077 		"File a radar related to rdar://10146739 \n");	\
2142 	 * Get number of bytes to send
2143 	 * Should it applies to size of header and trailer?
2149 	 * If specified, get the pointer to the sf_hdtr struct for
2197 	 *  1. We don't want to allocate more mbufs than necessary
2198 	 *  2. We don't want to read past the end of file
2207 	 * gather reads. We're not (yet?) setup to use zero copy external
2208 	 * mbufs that point to the file pages.
2228 		 * Calculate the amount to transfer.
2229 		 * Align to round number of pages.
2230 		 * Not to exceed send socket buffer,
2264 		 * Attempt to use larger than system page-size clusters for
2281 				"File a radar related to rdar://10146739.\n");
2347 		 * Make sure that the socket is still able to take more data.
2355 		 * results in a loop back to here to re-check).
2369 		 * Wait for socket space to become available. We do this just
2370 		 * after checking the connection state above in order to avoid