pxe_udp.c File Reference

PXE UDP API. More...

#include <string.h>
#include <byteswap.h>
#include <gpxe/xfer.h>
#include <gpxe/udp.h>
#include <gpxe/uaccess.h>
#include <gpxe/process.h>
#include <pxe.h>

Go to the source code of this file.

Data Structures
struct	pxe_udp_connection
	A PXE UDP connection. More...
Functions
	FILE_LICENCE (GPL2_OR_LATER)
static int	pxe_udp_deliver_iob (struct xfer_interface *xfer, struct io_buffer *iobuf, struct xfer_metadata *meta)
	Receive PXE UDP data.
PXENV_EXIT_t	pxenv_udp_open (struct s_PXENV_UDP_OPEN *pxenv_udp_open)
	UDP OPEN.
PXENV_EXIT_t	pxenv_udp_close (struct s_PXENV_UDP_CLOSE *pxenv_udp_close)
	UDP CLOSE.
PXENV_EXIT_t	pxenv_udp_write (struct s_PXENV_UDP_WRITE *pxenv_udp_write)
	UDP WRITE.
PXENV_EXIT_t	pxenv_udp_read (struct s_PXENV_UDP_READ *pxenv_udp_read)
	UDP READ.
Variables
static struct xfer_interface_operations	pxe_udp_xfer_operations
	PXE UDP data transfer interface operations.
static struct pxe_udp_connection	pxe_udp
	The PXE UDP connection.

---

Detailed Description

PXE UDP API.

Definition in file pxe_udp.c.

---

Function Documentation

FILE_LICENCE

(

GPL2_OR_LATER

)

static int pxe_udp_deliver_iob	(	struct xfer_interface *	xfer,
		struct io_buffer *	iobuf,
		struct xfer_metadata *	meta
	)			[static]

Receive PXE UDP data.

Parameters:

	xfer	Data transfer interface
	iobuf	I/O buffer
	meta	Data transfer metadata

Return values:

rc

Return status code

Receives a packet as part of the current pxenv_udp_read() operation.

Definition at line 56 of file pxe_udp.c.

References AF_INET, assert, s_PXENV_UDP_READ::buffer, s_PXENV_UDP_READ::buffer_size, container_of, copy_to_user(), s_PXENV_UDP_READ::d_port, io_buffer::data, DBG, xfer_metadata::dest, s_PXENV_UDP_READ::dest_ip, ENOBUFS, free_iob(), iob_len(), NULL, s_SEGOFF16::offset, pxe_udp, pxe_udp_connection::pxenv_udp_read, pxenv_udp_read(), real_to_user(), in_addr::s_addr, s_PXENV_UDP_READ::s_port, s_SEGOFF16::segment, sockaddr_in::sin_addr, sockaddr_in::sin_family, sockaddr_in::sin_port, xfer_metadata::src, and s_PXENV_UDP_READ::src_ip.

                                                              {
        struct pxe_udp_connection *pxe_udp = 
                container_of ( xfer, struct pxe_udp_connection, xfer );
        struct s_PXENV_UDP_READ *pxenv_udp_read = pxe_udp->pxenv_udp_read;
        struct sockaddr_in *sin_src;
        struct sockaddr_in *sin_dest;
        userptr_t buffer;
        size_t len;
        int rc = 0;

        if ( ! pxenv_udp_read ) {
                DBG ( "PXE discarded UDP packet\n" );
                rc = -ENOBUFS;
                goto done;
        }

        /* Copy packet to buffer and record length */
        buffer = real_to_user ( pxenv_udp_read->buffer.segment,
                                pxenv_udp_read->buffer.offset );
        len = iob_len ( iobuf );
        if ( len > pxenv_udp_read->buffer_size )
                len = pxenv_udp_read->buffer_size;
        copy_to_user ( buffer, 0, iobuf->data, len );
        pxenv_udp_read->buffer_size = len;

        /* Fill in source/dest information */
        assert ( meta );
        sin_src = ( struct sockaddr_in * ) meta->src;
        assert ( sin_src );
        assert ( sin_src->sin_family == AF_INET );
        pxenv_udp_read->src_ip = sin_src->sin_addr.s_addr;
        pxenv_udp_read->s_port = sin_src->sin_port;
        sin_dest = ( struct sockaddr_in * ) meta->dest;
        assert ( sin_dest );
        assert ( sin_dest->sin_family == AF_INET );
        pxenv_udp_read->dest_ip = sin_dest->sin_addr.s_addr;
        pxenv_udp_read->d_port = sin_dest->sin_port;

        /* Mark as received */
        pxe_udp->pxenv_udp_read = NULL;

 done:
        free_iob ( iobuf );
        return rc;
}

---

Variable Documentation

struct xfer_interface_operations pxe_udp_xfer_operations [static]

Initial value:

 {
        .close          = ignore_xfer_close,
        .vredirect      = ignore_xfer_vredirect,
        .window         = unlimited_xfer_window,
        .alloc_iob      = default_xfer_alloc_iob,
        .deliver_iob    = pxe_udp_deliver_iob,
        .deliver_raw    = xfer_deliver_as_iob,
}

PXE UDP data transfer interface operations.

Definition at line 105 of file pxe_udp.c.

struct pxe_udp_connection pxe_udp [static]

Initial value:

 {
        .xfer = XFER_INIT ( &pxe_udp_xfer_operations ),
        .local = {
                .sin_family = AF_INET,
        },
}

The PXE UDP connection.

Definition at line 115 of file pxe_udp.c.

Referenced by pxe_udp_deliver_iob().