// Get next auth manager message.
int authmgtGetNextMsg(struct s_authmgt *mgt, struct s_msg *out_msg, struct s_peeraddr *target) {
int used = idspUsedCount(&mgt->idsp);
int tnow = utilGetClock();
int authstateid;
int i;
for(i=0; i<used; i++) {
authstateid = idspNext(&mgt->idsp);
if((tnow - mgt->lastrecv[authstateid]) >= AUTHMGT_RECV_TIMEOUT) { // check if auth session has expired
authmgtDelete(mgt, authstateid);
continue;
}
if((tnow - mgt->lastsend[authstateid]) <= AUTHMGT_RESEND_TIMEOUT) { // only send one auth message per specified time interval and session
continue;
}
if(authGetNextMsg(&mgt->authstate[authstateid], out_msg)) {
mgt->lastsend[authstateid] = tnow;
*target = mgt->peeraddr[authstateid];
CREATE_HUMAN_IP(target);
debugf("[%d] New AUTH packet for %s created, size: %d", authstateid, humanIp, out_msg->len);
return 1;
}
}
return 0;
}
// Create new auth session. Returns ID of session if successful.
int authmgtNew(struct s_authmgt *mgt, const struct s_peeraddr *peeraddr) {
int authstateid = idspNew(&mgt->idsp);
int tnow = utilGetClock();
if(authstateid < 0) {
return -1;
}
mgt->lastsend[authstateid] = (mgt->fastauth) ? (tnow - authmgt_RESEND_TIMEOUT - 3) : tnow;
mgt->lastrecv[authstateid] = tnow;
mgt->peeraddr[authstateid] = *peeraddr;
CREATE_HUMAN_IP(peeraddr);
debugf("Starting new auth session for %s, ID: %d", humanIp, authstateid);
return authstateid;
}
// Update NodeDB entry.
static void nodedbUpdate(struct s_nodedb *db, struct s_nodeid *nodeid, struct s_peeraddr *addr, const int update_lastseen, const int update_lastconnect, const int update_lastconntry) {
int tnow = utilGetClock();
struct s_map *addrset;
struct s_map *newaddrset;
struct s_nodedb_addrdata *addrdata;
struct s_nodedb_addrdata addrdata_new;
if(db != NULL && nodeid != NULL && addr != NULL) {
addrset = mapGet(db->addrdb, nodeid->id);
if(addrset == NULL) {
newaddrset = mapGetValueByID(db->addrdb, mapAddReturnID(db->addrdb, nodeid->id, NULL));
if(newaddrset != NULL) {
if(mapMemInit(newaddrset, mapMemSize(db->num_peeraddrs, peeraddr_SIZE, sizeof(struct s_nodedb_addrdata)), db->num_peeraddrs, peeraddr_SIZE, sizeof(struct s_nodedb_addrdata))) {
mapEnableReplaceOld(newaddrset);
addrset = newaddrset;
}
}
}
if(addrset != NULL) {
addrdata_new.lastseen = 0;
addrdata_new.lastconnect = 0;
addrdata_new.lastconntry = 0;
addrdata_new.lastseen_t = 0;
addrdata_new.lastconnect_t = 0;
addrdata_new.lastconntry_t = 0;
if((addrdata = mapGet(addrset, addr->addr)) != NULL) {
addrdata_new = *addrdata;
}
if(update_lastseen > 0) {
addrdata_new.lastseen = 1;
addrdata_new.lastseen_t = tnow;
}
if(update_lastconnect > 0) {
addrdata_new.lastconnect = 1;
addrdata_new.lastconnect_t = tnow;
}
if(update_lastconntry > 0) {
addrdata_new.lastconntry = 1;
addrdata_new.lastconntry_t = tnow;
}
mapSet(addrset, addr->addr, &addrdata_new);
}
}
}
// Returns a NodeDB ID that matches the specified criteria.
static int nodedbGetDBID(struct s_nodedb *db, struct s_nodeid *nodeid, const int max_lastseen, const int max_lastconnect, const int min_lastconntry) {
int i, i_max, nid, tnow, ret;
tnow = utilGetClock();
i_max = mapGetKeyCount(db->addrdb);
ret = -1;
if(nodeid == NULL) { // find DBID for any NodeID
i = 0;
while((i < i_max) && (ret < 0)) {
nid = mapGetNextKeyID(db->addrdb);
ret = nodedbGetDBIDByID(db, nid, tnow, max_lastseen, max_lastconnect, min_lastconntry);
i++;
}
}
else { // find DBID for specified NodeID
nid = mapGetKeyID(db->addrdb, nodeid->id);
if(!(nid < 0)) {
ret = nodedbGetDBIDByID(db, nid, tnow, max_lastseen, max_lastconnect, min_lastconntry);
}
}
return ret;
}
// Generate NodeDB status report.
static void nodedbStatus(struct s_nodedb *db, char *report, const int report_len) {
int i;
int j;
int size;
int rpsize;
int pos;
int tnow;
unsigned char timediff[4];
struct s_map *addrset;
struct s_nodedb_addrdata *addrdata;
tnow = utilGetClock();
size = mapGetKeyCount(db->addrdb);
rpsize = (95 * (1 + db->num_peeraddrs)) + 2;
pos = 0;
memcpy(&report[pos], "NodeID + Address LastSeen LastConn LastTry ", 94);
pos = pos + 94;
report[pos++] = '\n';
i = 0;
while(i < size && pos < (report_len - rpsize)) {
if(mapIsValidID(db->addrdb, i)) {
utilByteArrayToHexstring(&report[pos], ((nodeid_SIZE * 2) + 2), mapGetKeyByID(db->addrdb, i), nodeid_SIZE);
pos = pos + (nodeid_SIZE * 2);
addrset = mapGetValueByID(db->addrdb, i);
memcpy(&report[pos], " ", 30);
pos = pos + 30;
j = 0;
while(j < db->num_peeraddrs) {
if(mapIsValidID(addrset, j)) {
addrdata = mapGetValueByID(addrset, j);
report[pos++] = '\n';
memcpy(&report[pos], " ", 12);
pos = pos + 12;
report[pos++] = '-';
report[pos++] = '-';
report[pos++] = '>';
report[pos++] = ' ';
utilByteArrayToHexstring(&report[pos], ((peeraddr_SIZE * 2) + 2), mapGetKeyByID(addrset, j), peeraddr_SIZE);
pos = pos + (peeraddr_SIZE * 2);
report[pos++] = ' ';
report[pos++] = ' ';
if(addrdata->lastseen) {
utilWriteInt32(timediff, (tnow - addrdata->lastseen_t));
utilByteArrayToHexstring(&report[pos], 10, timediff, 4);
}
else {
memcpy(&report[pos], "--------", 8);
}
pos = pos + 8;
report[pos++] = ' ';
report[pos++] = ' ';
if(addrdata->lastconnect) {
utilWriteInt32(timediff, (tnow - addrdata->lastconnect_t));
utilByteArrayToHexstring(&report[pos], 10, timediff, 4);
}
else {
memcpy(&report[pos], "--------", 8);
}
pos = pos + 8;
report[pos++] = ' ';
report[pos++] = ' ';
if(addrdata->lastconntry) {
utilWriteInt32(timediff, (tnow - addrdata->lastconntry_t));
utilByteArrayToHexstring(&report[pos], 10, timediff, 4);
}
else {
memcpy(&report[pos], "--------", 8);
}
pos = pos + 8;
}
j++;
}
report[pos++] = '\n';
}
i++;
}
report[pos++] = '\0';
}
// Decode auth message. Returns 1 if message is accepted.
int authmgtDecodeMsg(struct s_authmgt *mgt, const unsigned char *msg, const int msg_len, const struct s_peeraddr *peeraddr) {
int authid;
int authstateid;
int tnow = utilGetClock();
int newsession;
int dupid;
CREATE_HUMAN_IP(peeraddr);
debugf("[%s] AUTH message received", humanIp);
if(msg_len <= 4) {
debugf("[%s] Wrong AUTH message size: %d", humanIp, msg_len);
return 0;
}
authid = utilReadInt32(msg);
if(authid > 0) {
// message belongs to existing auth session
authstateid = (authid - 1);
debugf("Found active auth session: %d", authstateid);
if(authstateid >= idspSize(&mgt->idsp)) {
debugf("[%s] wrong auth state ID", humanIp);
return 0;
}
if(!authDecodeMsg(&mgt->authstate[authstateid], msg, msg_len)) {
debugf("[%s] failed to decode AUTH message", humanIp);
return 0;
}
mgt->lastrecv[authstateid] = tnow;
mgt->peeraddr[authstateid] = *peeraddr;
if(mgt->fastauth) {
mgt->lastsend[authstateid] = (tnow - authmgt_RESEND_TIMEOUT - 3);
}
if((authIsAuthed(&mgt->authstate[authstateid])) && (!authIsCompleted(&mgt->authstate[authstateid]))) mgt->current_authed_id = authstateid;
if((authIsCompleted(&mgt->authstate[authstateid])) && (!authIsPeerCompleted(&mgt->authstate[authstateid]))) {
msgf("Host %s authorized", humanIp);
mgt->current_completed_id = authstateid;
}
return 1;
} else if(authid == 0) {
debugf("starting new session for %s, authid: %d", humanIp, authid);
// message requests new auth session
dupid = authmgtFindAddr(mgt, peeraddr);
// we already have this session
if(dupid >= 0) {
// auth session with same PeerAddr found.
if(authIsPreauth(&mgt->authstate[dupid])) {
return 0;
}
authmgtDelete(mgt, dupid);
}
authstateid = authmgtNew(mgt, peeraddr);
if(authstateid < 0) {
// all auth slots are full, search for unused sessions that can be replaced
dupid = authmgtFindUnused(mgt);
if(!(dupid < 0)) {
authmgtDelete(mgt, dupid);
authstateid = authmgtNew(mgt, peeraddr);
debugf("new auth session started for %s, authstateid %d", humanIp, authstateid);
}
}
if(!(authstateid < 0)) {
if(authDecodeMsg(&mgt->authstate[authstateid], msg, msg_len)) {
mgt->lastrecv[authstateid] = tnow;
mgt->peeraddr[authstateid] = *peeraddr;
if(mgt->fastauth) {
mgt->lastsend[authstateid] = (tnow - authmgt_RESEND_TIMEOUT - 3);
}
return 1;
}
else {
authmgtDelete(mgt, authstateid);
}
}
}
return 0;
}