Andrea Maria Piana e65760ca85 Add basic peersyncing
This commit adds basic syncing capabilities with peers if they are both
online.

It updates the work done on MVDS, but I decided to create the code in
status-go instead, since it's very tight to the application (similarly
the code that was the inspiration for mvds, bramble, is all tight
together at the database level).

I reused parts of the protobufs.

The flow is:

1) An OFFER message is sent periodically with a bunch of message-ids and
   group-ids.
2) Anyone can REQUEST some of those messages if not present in their
   database.

3) The peer will then send over those messages.

It's disabled by default, but I am planning to add a way to set up the
flags.
2024-01-23 12:46:17 +00:00

64 lines
1.3 KiB
C

#ifndef _SEARCH_H
#define _SEARCH_H
#ifdef __cplusplus
extern "C" {
#endif
#include <features.h>
#define __NEED_size_t
#include <bits/alltypes.h>
typedef enum { FIND, ENTER } ACTION;
typedef enum { preorder, postorder, endorder, leaf } VISIT;
typedef struct entry {
char *key;
void *data;
} ENTRY;
int hcreate(size_t);
void hdestroy(void);
ENTRY *hsearch(ENTRY, ACTION);
#ifdef _GNU_SOURCE
struct hsearch_data {
struct __tab *__tab;
unsigned int __unused1;
unsigned int __unused2;
};
int hcreate_r(size_t, struct hsearch_data *);
void hdestroy_r(struct hsearch_data *);
int hsearch_r(ENTRY, ACTION, ENTRY **, struct hsearch_data *);
#endif
void insque(void *, void *);
void remque(void *);
void *lsearch(const void *, void *, size_t *, size_t,
int (*)(const void *, const void *));
void *lfind(const void *, const void *, size_t *, size_t,
int (*)(const void *, const void *));
void *tdelete(const void *__restrict, void **__restrict, int(*)(const void *, const void *));
void *tfind(const void *, void *const *, int(*)(const void *, const void *));
void *tsearch(const void *, void **, int (*)(const void *, const void *));
void twalk(const void *, void (*)(const void *, VISIT, int));
#ifdef _GNU_SOURCE
struct qelem {
struct qelem *q_forw, *q_back;
char q_data[1];
};
void tdestroy(void *, void (*)(void *));
#endif
#ifdef __cplusplus
}
#endif
#endif