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Simplify TX datapath.

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This commit is contained in:
Michael Brown
2006-06-16 00:19:46 +00:00
parent cce2e47ff4
commit bbd9e28061
9 changed files with 279 additions and 456 deletions
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9
src/include/gpxe/arp.h
View File

@@ -8,11 +8,12 @@
*/
struct net_device;
struct net_header;
struct ll_header;
struct net_protocol;
extern int arp_resolve ( struct net_device *netdev,
const struct net_header *nethdr,
struct ll_header *llhdr );
struct net_protocol *net_protocol,
const void *dest_net_addr,
const void *source_net_addr,
void *dest_ll_addr );
#endif /* _GPXE_ARP_H */

6
src/include/gpxe/ip.h
View File

@@ -11,4 +11,10 @@ struct net_protocol;
extern struct net_protocol ipv4_protocol;
extern int add_ipv4_address ( struct net_device *netdev,
struct in_addr address, struct in_addr netmask,
struct in_addr gateway );
extern void del_ipv4_address ( struct net_device *netdev );
extern int ipv4_uip_transmit ( struct pk_buff *pkb );
#endif /* _GPXE_IP_H */

107
src/include/gpxe/netdevice.h
View File

@@ -86,22 +86,6 @@ struct ll_header {
struct net_protocol {
/** Protocol name */
const char *name;
/**
* Perform network-layer routing
*
* @v pkb Packet buffer
* @v nethdr Generic network-layer header
* @ret rc Return status code
*
* This method should fill in the network header with enough
* information to allow the link layer to route the packet.
*
* For example, in the case of IPv4, this method should fill
* in the IP addresses of the local adapter and the next hop
* destination (e.g. the gateway).
*/
int ( * route ) ( const struct pk_buff *pkb,
struct net_header *nethdr );
/**
* Process received packet
*
@@ -141,36 +125,21 @@ struct ll_protocol {
/** Protocol name */
const char *name;
/**
* Perform link-layer routing
* Transmit network-layer packet via network device
*
* @v netdev Network device
* @v nethdr Generic network-layer header
* @ret llhdr Generic link-layer header
* @ret rc Return status code
*
* This method should construct the generic link-layer header
* based on the generic network-layer header.
* @v pkb Packet buffer
* @v netdev Network device
* @v net_protocol Network-layer protocol
* @v ll_dest Link-layer destination address
* @ret rc Return status code
*
* If a link-layer header cannot be constructed (e.g. because
* of a missing ARP cache entry), then this method should
* return an error (after transmitting an ARP request, if
* applicable).
* This method should prepend in the link-layer header
* (e.g. the Ethernet DIX header) and transmit the packet.
*/
int ( * route ) ( struct net_device *netdev,
const struct net_header *nethdr,
struct ll_header *llhdr );
/**
* Fill media-specific link-layer header
*
* @v llhdr Generic link-layer header
* @v pkb Packet buffer
*
* This method should fill in the link-layer header in the
* packet buffer based on information in the generic
* link-layer header.
*/
void ( * fill_llh ) ( const struct ll_header *llhdr,
struct pk_buff *pkb );
int ( * transmit ) ( struct pk_buff *pkb, struct net_device *netdev,
struct net_protocol *net_protocol,
const void *ll_dest );
/**
* Parse media-specific link-layer header
*
@@ -204,8 +173,8 @@ struct ll_protocol {
uint16_t ll_proto;
/** Link-layer address length */
uint8_t ll_addr_len;
/** Link-layer header length */
uint8_t ll_header_len;
/** Link-layer broadcast address */
const uint8_t *ll_broadcast;
};
/**
@@ -288,31 +257,6 @@ extern struct net_device static_single_netdev;
static_single_netdev.priv = priv_data; \
&static_single_netdev; } )
/**
* Register network device
*
* @v netdev Network device
* @ret rc Return status code
*
* Adds the network device to the list of network devices.
*/
static inline int
register_netdev ( struct net_device *netdev __attribute__ (( unused )) ) {
return 0;
}
/**
* Unregister network device
*
* @v netdev Network device
*
* Removes the network device from the list of network devices.
*/
static inline void
unregister_netdev ( struct net_device *netdev __attribute__ (( unused )) ) {
/* Nothing to do */
}
/**
* Free network device
*
@@ -339,6 +283,27 @@ static inline int netdev_transmit ( struct net_device *netdev,
return netdev->transmit ( netdev, pkb );
}
/**
* Transmit network-layer packet
*
* @v pkb Packet buffer
* @v netdev Network device
* @v net_protocol Network-layer protocol
* @v ll_dest Destination link-layer address
* @ret rc Return status code
*
* Prepends link-layer headers to the packet buffer and transmits the
* packet via the specified network device. This function takes
* ownership of the packet buffer.
*/
static inline int net_transmit ( struct pk_buff *pkb,
struct net_device *netdev,
struct net_protocol *net_protocol,
const void *ll_dest ) {
return netdev->ll_protocol->transmit ( pkb, netdev, net_protocol,
ll_dest );
}
/**
* Register a link-layer protocol
*
@@ -363,14 +328,14 @@ static inline int netdev_transmit ( struct net_device *netdev,
#define STATIC_SINGLE_NETDEV_ADDRESS( address ) \
struct net_address address __table ( sgl_netdev_addresses, 01 )
extern int register_netdev ( struct net_device *netdev );
extern void unregister_netdev ( struct net_device *netdev );
extern void netdev_rx ( struct net_device *netdev, struct pk_buff *pkb );
extern struct net_protocol *find_net_protocol ( uint16_t net_proto );
extern struct net_device *
find_netdev_by_net_addr ( struct net_protocol *net_protocol, void *net_addr );
extern int net_transmit_via ( struct pk_buff *pkb, struct net_device *netdev );
extern int net_transmit ( struct pk_buff *pkb );
extern int net_poll ( void );
extern struct pk_buff * net_rx_dequeue ( void );
extern int net_rx_process ( struct pk_buff *pkb );