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Add concept of transfer metadata, to be used by UDP in order to 

implement sendto()/recvfrom() equivalents.
This commit is contained in:
Michael Brown 2007-06-11 15:04:39 +01:00
parent 77e575235d
commit 95adce0ce1
6 changed files with 54 additions and 13 deletions
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7
src/core/posix_io.c
View File

@ -141,10 +141,13 @@ static int posix_file_xfer_seek ( struct xfer_interface *xfer, off_t offset,
*
* @v xfer POSIX file data transfer interface
* @v iobuf I/O buffer
* @v meta Data transfer metadata, or NULL
* @ret rc Return status code
*/
static int posix_file_xfer_deliver_iob ( struct xfer_interface *xfer,
struct io_buffer *iobuf ) {
static int
posix_file_xfer_deliver_iob ( struct xfer_interface *xfer,
struct io_buffer *iobuf,
struct xfer_metadata *meta __unused ) {
struct posix_file *file =
container_of ( xfer, struct posix_file, xfer );

27
src/core/xfer.c
View File

@ -174,20 +174,23 @@ struct io_buffer * xfer_alloc_iob ( struct xfer_interface *xfer, size_t len ) {
}
/**
* Deliver datagram
* Deliver datagram as I/O buffer with metadata
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @v meta Data transfer metadata, or NULL
* @ret rc Return status code
*/
int xfer_deliver_iob ( struct xfer_interface *xfer, struct io_buffer *iobuf ) {
int xfer_deliver_iob_meta ( struct xfer_interface *xfer,
struct io_buffer *iobuf,
struct xfer_metadata *meta ) {
struct xfer_interface *dest = xfer_get_dest ( xfer );
int rc;
DBGC ( xfer, "XFER %p->%p deliver_iob %zd\n", xfer, dest,
iob_len ( iobuf ) );
rc = dest->op->deliver_iob ( dest, iobuf );
rc = dest->op->deliver_iob ( dest, iobuf, meta );
if ( rc != 0 ) {
DBGC ( xfer, "XFER %p<-%p deliver_iob: %s\n", xfer, dest,
@ -197,6 +200,18 @@ int xfer_deliver_iob ( struct xfer_interface *xfer, struct io_buffer *iobuf ) {
return rc;
}
/**
* Deliver datagram as I/O buffer with metadata
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @ret rc Return status code
*/
int xfer_deliver_iob ( struct xfer_interface *xfer,
struct io_buffer *iobuf ) {
return xfer_deliver_iob_meta ( xfer, iobuf, NULL );
}
/**
* Deliver datagram as raw data
*
@ -341,13 +356,15 @@ default_xfer_alloc_iob ( struct xfer_interface *xfer __unused, size_t len ) {
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @v meta Data transfer metadata
* @ret rc Return status code
*
* This function is intended to be used as the deliver() method for
* data transfer interfaces that prefer to handle raw data.
*/
int xfer_deliver_as_raw ( struct xfer_interface *xfer,
struct io_buffer *iobuf ) {
struct io_buffer *iobuf,
struct xfer_metadata *meta __unused ) {
int rc;
rc = xfer->op->deliver_raw ( xfer, iobuf->data, iob_len ( iobuf ) );
@ -375,7 +392,7 @@ int xfer_deliver_as_iob ( struct xfer_interface *xfer,
return -ENOMEM;
memcpy ( iob_put ( iobuf, len ), data, len );
return xfer->op->deliver_iob ( xfer, iobuf );
return xfer->op->deliver_iob ( xfer, iobuf, NULL );
}
/**

21
src/include/gpxe/xfer.h
View File

@ -13,6 +13,7 @@
#include <gpxe/iobuf.h>
struct xfer_interface;
struct xfer_metadata;
/** Data transfer interface operations */
struct xfer_interface_operations {
@ -63,10 +64,11 @@ struct xfer_interface_operations {
*/
struct io_buffer * ( * alloc_iob ) ( struct xfer_interface *xfer,
size_t len );
/** Deliver datagram as I/O buffer
/** Deliver datagram as I/O buffer with metadata
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @v meta Data transfer metadata, or NULL
* @ret rc Return status code
*
* A data transfer interface that wishes to support only raw
@ -78,7 +80,8 @@ struct xfer_interface_operations {
* fatal error.
*/
int ( * deliver_iob ) ( struct xfer_interface *xfer,
struct io_buffer *iobuf );
struct io_buffer *iobuf,
struct xfer_metadata *meta );
/** Deliver datagram as raw data
*
* @v xfer Data transfer interface
@ -106,6 +109,14 @@ struct xfer_interface {
struct xfer_interface_operations *op;
};
/** Data transfer metadata */
struct xfer_metadata {
/** Source socket address, or NULL */
struct sockaddr *src;
/** Destination socket address, or NULL */
struct sockaddr *dest;
};
/** Basis positions for seek() events */
enum seek_whence {
SEEK_SET = 0,
@ -141,6 +152,9 @@ extern struct io_buffer * xfer_alloc_iob ( struct xfer_interface *xfer,
size_t len );
extern int xfer_deliver_iob ( struct xfer_interface *xfer,
struct io_buffer *iobuf );
extern int xfer_deliver_iob_meta ( struct xfer_interface *xfer,
struct io_buffer *iobuf,
struct xfer_metadata *meta );
extern int xfer_deliver_raw ( struct xfer_interface *xfer,
const void *data, size_t len );
extern int xfer_vprintf ( struct xfer_interface *xfer,
@ -158,7 +172,8 @@ extern int ignore_xfer_seek ( struct xfer_interface *xfer, off_t offset,
extern struct io_buffer * default_xfer_alloc_iob ( struct xfer_interface *xfer,
size_t len );
extern int xfer_deliver_as_raw ( struct xfer_interface *xfer,
struct io_buffer *iobuf );
struct io_buffer *iobuf,
struct xfer_metadata *meta );
extern int xfer_deliver_as_iob ( struct xfer_interface *xfer,
const void *data, size_t len );
extern int ignore_xfer_deliver_raw ( struct xfer_interface *xfer,

4
src/net/tcp.c
View File

@ -930,10 +930,12 @@ static int tcp_xfer_seek ( struct xfer_interface *xfer, off_t offset,
*
* @v xfer Data transfer interface
* @v iobuf Datagram I/O buffer
* @v meta Data transfer metadata, or NULL
* @ret rc Return status code
*/
static int tcp_xfer_deliver_iob ( struct xfer_interface *xfer,
struct io_buffer *iobuf ) {
struct io_buffer *iobuf,
struct xfer_metadata *meta __unused ) {
struct tcp_connection *tcp =
container_of ( xfer, struct tcp_connection, xfer );

4
src/net/tcp/ftp.c
View File

@ -338,10 +338,12 @@ static void ftp_data_closed ( struct xfer_interface *data, int rc ) {
*
* @v xfer FTP data channel interface
* @v iobuf I/O buffer
* @v meta Data transfer metadata, or NULL
* @ret rc Return status code
*/
static int ftp_data_deliver_iob ( struct xfer_interface *data,
struct io_buffer *iobuf ) {
struct io_buffer *iobuf,
struct xfer_metadata *meta __unused ) {
struct ftp_request *ftp =
container_of ( data, struct ftp_request, data );
int rc;

4
src/net/tcp/http.c
View File

@ -316,10 +316,12 @@ static int http_rx_data ( struct http_request *http,
*
* @v socket Transport layer interface
* @v iobuf I/O buffer
* @v meta Data transfer metadata, or NULL
* @ret rc Return status code
*/
static int http_socket_deliver_iob ( struct xfer_interface *socket,
struct io_buffer *iobuf ) {
struct io_buffer *iobuf,
struct xfer_metadata *meta __unused ) {
struct http_request *http =
container_of ( socket, struct http_request, socket );
struct http_line_handler *lh;