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Added features that will be required for PXE UDP support.

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Introduced struct sockaddr_tcpip, to simplify code that deals with
both IPv4 and IPv6 addresses.

Reorganised parts of tcpip.c and udp.c.
This commit is contained in:
Michael Brown
2006-08-02 00:02:21 +00:00
parent 9225f4edac
commit 467e9627cc
13 changed files with 394 additions and 481 deletions
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95
src/include/gpxe/tcpip.h
View File

@@ -8,16 +8,36 @@
*/
#include <stdint.h>
#include <gpxe/socket.h>
#include <gpxe/in.h>
#include <gpxe/tables.h>
struct pk_buff;
struct net_protocol;
struct tcpip_protocol;
struct tcpip_net_protocol;
#define SA_TCPIP_LEN 32
/**
* TCP/IP socket address
*
* This contains the fields common to socket addresses for all TCP/IP
* address families.
*/
struct sockaddr_tcpip {
/** Socket address family (part of struct @c sockaddr) */
sa_family_t st_family;
/** TCP/IP port */
uint16_t st_port;
/** Padding
*
* This ensures that a struct @c sockaddr_tcpip is large
* enough to hold a socket address for any TCP/IP address
* family.
*/
char pad[SA_TCPIP_LEN - sizeof ( sa_family_t ) - sizeof ( uint16_t )];
};
/**
* A transport-layer protocol of the TCPIP stack (eg. UDP, TCP, etc)
* A transport-layer protocol of the TCP/IP stack (eg. UDP, TCP, etc)
*/
struct tcpip_protocol {
/** Protocol name */
@@ -25,75 +45,76 @@ struct tcpip_protocol {
/**
* Process received packet
*
* @v pkb Packet buffer
* @v netdev Network device
* @v ll_source Link-layer source address
* @v pkb Packet buffer
* @v st_src Partially-filled source address
* @v st_dest Partially-filled destination address
* @ret rc Return status code
*
* This method takes ownership of the packet buffer.
*/
void ( * rx ) ( struct pk_buff *pkb, struct in_addr *src_net_addr,
struct in_addr *dest_net_addr );
int ( * rx ) ( struct pk_buff *pkb, struct sockaddr_tcpip *st_src,
struct sockaddr_tcpip *st_dest );
/**
* Transport-layer protocol number
*
* This is a constant of the type IP_XXX
*/
uint8_t trans_proto;
uint8_t tcpip_proto;
/**
* Checksum offset
*
* A negative number indicates that the protocol does not require
* checksumming to be performed by the network layer. A positive number
* is the offset of the checksum field in the transport-layer header.
* A negative number indicates that the protocol does not
* require checksumming to be performed by the network layer.
* A positive number is the offset of the checksum field in
* the transport-layer header.
*/
int csum_offset;
};
/**
* A TCPIP supporting network-layer protocol
* A network-layer protocol of the TCP/IP stack (eg. IPV4, IPv6, etc)
*/
struct tcpip_net_protocol {
/** Network protocol */
struct net_protocol *net_protocol;
/** Protocol name */
const char *name;
/** Network address family */
sa_family_t sa_family;
/**
* Transmit packet
*
* @v pkb Packet buffer
* @v tcpip Transport-layer TCP/IP protocol
* @v sock Socket address
*/
int ( * tx ) ( struct pk_buff *pkb, struct tcpip_protocol *tcpip,
struct sockaddr *sock );
/** Complete transport-layer checksum calculation
*
* @v pkb Packet buffer
* @v tcpip Transport-layer protocol
* @v tcpip_protocol Transport-layer protocol
* @v st_dest Destination address
* @ret rc Return status code
*
* This function takes ownership of the packet buffer.
*/
void ( * tx_csum ) ( struct pk_buff *pkb,
struct tcpip_protocol *tcpip );
int ( * tx ) ( struct pk_buff *pkb,
struct tcpip_protocol *tcpip_protocol,
struct sockaddr_tcpip *st_dest );
};
/**
* Register a transport-layer protocol
* Register a TCP/IP transport-layer protocol
*
* @v protocol Transport-layer protocol
* @v protocol Transport-layer protocol
*/
#define TCPIP_PROTOCOL( protocol ) \
struct tcpip_protocol protocol __table ( tcpip_protocols, 01 )
struct tcpip_protocol protocol __table ( tcpip_protocols, 01 )
/**
* Register a TCP/IP network-layer protocol
*
* @v protocol Network-layer protocol
*/
#define TCPIP_NET_PROTOCOL( protocol ) \
struct tcpip_net_protocol protocol __table ( tcpip_net_protocols, 01 )
extern void tcpip_rx ( struct pk_buff *pkb, uint8_t trans_proto,
struct in_addr *src, struct in_addr *dest );
struct tcpip_net_protocol protocol __table ( tcpip_net_protocols, 01 )
extern int tcpip_rx ( struct pk_buff *pkb, uint8_t tcpip_proto,
struct sockaddr_tcpip *st_src,
struct sockaddr_tcpip *st_dest );
extern int tcpip_tx ( struct pk_buff *pkb, struct tcpip_protocol *tcpip,
struct sockaddr *dest );
struct sockaddr_tcpip *st_dest );
extern unsigned int tcpip_continue_chksum ( unsigned int partial,
const void *data, size_t len );
extern unsigned int tcpip_chksum ( const void *data, size_t len );