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[peerdist] Add segment discovery mechanism

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Signed-off-by: Michael Brown <mcb30@ipxe.org>
This commit is contained in:
Michael Brown
2015-08-17 13:16:33 +01:00
parent 518a98eb56
commit dc9d24e7d2
4 changed files with 671 additions and 0 deletions
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1
src/include/ipxe/errfile.h
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@@ -252,6 +252,7 @@ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#define ERRFILE_httpauth ( ERRFILE_NET | 0x00420000 )
#define ERRFILE_httpbasic ( ERRFILE_NET | 0x00430000 )
#define ERRFILE_httpdigest ( ERRFILE_NET | 0x00440000 )
#define ERRFILE_peerdisc ( ERRFILE_NET | 0x00450000 )
#define ERRFILE_image ( ERRFILE_IMAGE | 0x00000000 )
#define ERRFILE_elf ( ERRFILE_IMAGE | 0x00010000 )

116
src/include/ipxe/peerdisc.h Normal file
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@@ -0,0 +1,116 @@
#ifndef _IPXE_PEERDISC_H
#define _IPXE_PEERDISC_H
/** @file
*
* Peer Content Caching and Retrieval (PeerDist) protocol peer discovery
*
*/
FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
#include <stdint.h>
#include <ipxe/refcnt.h>
#include <ipxe/list.h>
#include <ipxe/tables.h>
#include <ipxe/retry.h>
#include <ipxe/socket.h>
#include <ipxe/interface.h>
#include <ipxe/pccrc.h>
/** A PeerDist discovery socket */
struct peerdisc_socket {
/** Name */
const char *name;
/** Data transfer interface */
struct interface xfer;
/** Socket address */
union {
struct sockaddr sa;
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
} address;
};
/** PeerDist discovery socket table */
#define PEERDISC_SOCKETS __table ( struct peerdisc_socket, "peerdisc_sockets" )
/** Declare a PeerDist discovery socket */
#define __peerdisc_socket __table_entry ( PEERDISC_SOCKETS, 01 )
/** A PeerDist discovery segment */
struct peerdisc_segment {
/** Reference count */
struct refcnt refcnt;
/** List of segments */
struct list_head list;
/** Segment identifier string
*
* This is MS-PCCRC's "HoHoDk", transcribed as an upper-case
* Base16-encoded string.
*/
const char *id;
/** Message UUID string */
const char *uuid;
/** List of discovered peers
*
* The list of peers may be appended to during the lifetime of
* the discovery segment. Discovered peers will not be
* removed from the list until the last discovery has been
* closed; this allows users to safely maintain a pointer to a
* current position within the list.
*/
struct list_head peers;
/** List of active clients */
struct list_head clients;
/** Transmission timer */
struct retry_timer timer;
};
/** A PeerDist discovery peer */
struct peerdisc_peer {
/** List of peers */
struct list_head list;
/** Peer location */
char location[0];
};
/** A PeerDist discovery client */
struct peerdisc_client {
/** Discovery segment */
struct peerdisc_segment *segment;
/** List of clients */
struct list_head list;
/** Operations */
struct peerdisc_client_operations *op;
};
/** PeerDist discovery client operations */
struct peerdisc_client_operations {
/** New peers have been discovered
*
* @v peerdisc PeerDist discovery client
*/
void ( * discovered ) ( struct peerdisc_client *peerdisc );
};
/**
* Initialise PeerDist discovery
*
* @v peerdisc PeerDist discovery client
* @v op Discovery operations
*/
static inline __attribute__ (( always_inline )) void
peerdisc_init ( struct peerdisc_client *peerdisc,
struct peerdisc_client_operations *op ) {
peerdisc->op = op;
}
extern unsigned int peerdisc_timeout_secs;
extern int peerdisc_open ( struct peerdisc_client *peerdisc, const void *id,
size_t len );
extern void peerdisc_close ( struct peerdisc_client *peerdisc );
#endif /* _IPXE_PEERDISC_H */