static bool nc_msg_version(struct nc_conn *conn)
{
if (conn->seen_version){
LOG("version command already seen from:%s", conn->addr_str);
return false;
}
conn->seen_version = true;
struct const_buffer buf = { conn->msg.data, conn->msg.hdr.data_len };
struct msg_version mv;
bool rc = false;
msg_version_init(&mv);
if (!deser_msg_version(&mv, &buf))
goto out;
if (debugging) {
char fromstr[64], tostr[64];
bn_address_str(fromstr, sizeof(fromstr), mv.addrFrom.ip);
bn_address_str(tostr, sizeof(tostr), mv.addrTo.ip);
fprintf(plog, "net: %s version(%u, 0x%llx, %lld, To:%s, From:%s, %s, %u)\n",
conn->addr_str,
mv.nVersion,
(unsigned long long) mv.nServices,
(long long) mv.nTime,
tostr,
fromstr,
mv.strSubVer,
mv.nStartingHeight);
}
if (!(mv.nServices & NODE_NETWORK)) /* require NODE_NETWORK */
goto out;
if (mv.nonce == instance_nonce) /* connected to ourselves? */
goto out;
conn->protover = MIN(mv.nVersion, PROTO_VERSION);
/* acknowledge version receipt */
if (!nc_conn_send(conn, "verack", NULL, 0))
goto out;
rc = true;
out:
msg_version_free(&mv);
return rc;
}
static cstring *nc_version_build(struct nc_conn *conn)
{
struct msg_version mv;
msg_version_init(&mv);
mv.nVersion = PROTO_VERSION;
mv.nTime = (int64_t) time(NULL);
mv.nonce = *conn->nci->instance_nonce;
sprintf(mv.strSubVer, "/picocoin:%s/", VERSION);
mv.nStartingHeight =
conn->nci->db->best_chain ?
conn->nci->db->best_chain->height : 0;
cstring *rs = ser_msg_version(&mv);
msg_version_free(&mv);
return rs;
}
static cstring *nc_version_build(struct nc_conn *conn)
{
struct msg_version mv;
msg_version_init(&mv);
mv.nVersion = PROTO_VERSION;/* from picocoin.h (60002) */
/* from core.hi: enum { NODE_NETWORK = (1 << 0)}*/
mv.nServices = blocks_fd >= 0 ? NODE_NETWORK : 0;
mv.nTime = (int64_t) time(NULL); /* number of seconds since 1970*/
mv.nonce = instance_nonce;/* generated by RAND_bytes (OpenSSL) */
/* VERSION in picocoin-config.h "0.1git" */
sprintf(mv.strSubVer, "/brd:%s/", VERSION);
mv.nStartingHeight = db.best_chain ? db.best_chain->height : 0;
cstring *rs = ser_msg_version(&mv);
msg_version_free(&mv);
return rs;
}
