diff options
Diffstat (limited to 'qemu/roms/ipxe/src/include/ipxe/tcpip.h')
| -rw-r--r-- | qemu/roms/ipxe/src/include/ipxe/tcpip.h | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/qemu/roms/ipxe/src/include/ipxe/tcpip.h b/qemu/roms/ipxe/src/include/ipxe/tcpip.h new file mode 100644 index 000000000..200630d6b --- /dev/null +++ b/qemu/roms/ipxe/src/include/ipxe/tcpip.h @@ -0,0 +1,167 @@ +#ifndef _IPXE_TCPIP_H +#define _IPXE_TCPIP_H + +/** @file + * + * Transport-network layer interface + * + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#include <stdint.h> +#include <ipxe/socket.h> +#include <ipxe/in.h> +#include <ipxe/tables.h> +#include <bits/tcpip.h> + +struct io_buffer; +struct net_device; +struct ip_statistics; + +/** Empty checksum value + * + * This is the TCP/IP checksum over a zero-length block of data. + */ +#define TCPIP_EMPTY_CSUM 0xffff + +/** TCP/IP address flags */ +enum tcpip_st_flags { + /** Bind to a privileged port (less than 1024) + * + * This value is chosen as 1024 to optimise the calculations + * in tcpip_bind(). + */ + TCPIP_BIND_PRIVILEGED = 0x0400, +}; + +/** + * 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; + /** Flags */ + uint16_t st_flags; + /** 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[ sizeof ( struct sockaddr ) - + ( sizeof ( sa_family_t ) /* st_family */ + + sizeof ( uint16_t ) /* st_flags */ + + sizeof ( uint16_t ) /* st_port */ ) ]; +} __attribute__ (( packed, may_alias )); + +/** + * A transport-layer protocol of the TCP/IP stack (eg. UDP, TCP, etc) + */ +struct tcpip_protocol { + /** Protocol name */ + const char *name; + /** + * Process received packet + * + * @v iobuf I/O buffer + * @v netdev Network device + * @v st_src Partially-filled source address + * @v st_dest Partially-filled destination address + * @v pshdr_csum Pseudo-header checksum + * @ret rc Return status code + * + * This method takes ownership of the I/O buffer. + */ + int ( * rx ) ( struct io_buffer *iobuf, struct net_device *netdev, + struct sockaddr_tcpip *st_src, + struct sockaddr_tcpip *st_dest, uint16_t pshdr_csum ); + /** + * Transport-layer protocol number + * + * This is a constant of the type IP_XXX + */ + uint8_t tcpip_proto; +}; + +/** + * A network-layer protocol of the TCP/IP stack (eg. IPV4, IPv6, etc) + */ +struct tcpip_net_protocol { + /** Protocol name */ + const char *name; + /** Network address family */ + sa_family_t sa_family; + /** Fixed header length */ + size_t header_len; + /** + * Transmit packet + * + * @v iobuf I/O buffer + * @v tcpip_protocol Transport-layer protocol + * @v st_src Source address, or NULL to use default + * @v st_dest Destination address + * @v netdev Network device (or NULL to route automatically) + * @v trans_csum Transport-layer checksum to complete, or NULL + * @ret rc Return status code + * + * This function takes ownership of the I/O buffer. + */ + int ( * tx ) ( struct io_buffer *iobuf, + struct tcpip_protocol *tcpip_protocol, + struct sockaddr_tcpip *st_src, + struct sockaddr_tcpip *st_dest, + struct net_device *netdev, + uint16_t *trans_csum ); + /** + * Determine transmitting network device + * + * @v st_dest Destination address + * @ret netdev Network device, or NULL + */ + struct net_device * ( * netdev ) ( struct sockaddr_tcpip *dest ); +}; + +/** TCP/IP transport-layer protocol table */ +#define TCPIP_PROTOCOLS __table ( struct tcpip_protocol, "tcpip_protocols" ) + +/** Declare a TCP/IP transport-layer protocol */ +#define __tcpip_protocol __table_entry ( TCPIP_PROTOCOLS, 01 ) + +/** TCP/IP network-layer protocol table */ +#define TCPIP_NET_PROTOCOLS \ + __table ( struct tcpip_net_protocol, "tcpip_net_protocols" ) + +/** Declare a TCP/IP network-layer protocol */ +#define __tcpip_net_protocol __table_entry ( TCPIP_NET_PROTOCOLS, 01 ) + +extern int tcpip_rx ( struct io_buffer *iobuf, struct net_device *netdev, + uint8_t tcpip_proto, struct sockaddr_tcpip *st_src, + struct sockaddr_tcpip *st_dest, uint16_t pshdr_csum, + struct ip_statistics *stats ); +extern int tcpip_tx ( struct io_buffer *iobuf, struct tcpip_protocol *tcpip, + struct sockaddr_tcpip *st_src, + struct sockaddr_tcpip *st_dest, + struct net_device *netdev, + uint16_t *trans_csum ); +extern struct net_device * tcpip_netdev ( struct sockaddr_tcpip *st_dest ); +extern size_t tcpip_mtu ( struct sockaddr_tcpip *st_dest ); +extern uint16_t generic_tcpip_continue_chksum ( uint16_t partial, + const void *data, size_t len ); +extern uint16_t tcpip_chksum ( const void *data, size_t len ); +extern int tcpip_bind ( struct sockaddr_tcpip *st_local, + int ( * available ) ( int port ) ); + +/* Use generic_tcpip_continue_chksum() if no architecture-specific + * version is available + */ +#ifndef tcpip_continue_chksum +#define tcpip_continue_chksum generic_tcpip_continue_chksum +#endif + +#endif /* _IPXE_TCPIP_H */ |