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v4k-git-backup/engine/split/v4k_netsync.c

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typedef void* (*rpc_function)();
typedef struct rpc_call {
char *method;
rpc_function function;
uint64_t function_hash;
} rpc_call;
#define RPC_SIGNATURE_i_iii UINT64_C(0x78409099752fa48a)
#define RPC_SIGNATURE_i_ii UINT64_C(0x258290edf43985a5)
#define RPC_SIGNATURE_i_s UINT64_C(0xf7b73162829ed667)
#define RPC_SIGNATURE_s_s UINT64_C(0x97deedd17d9afb12)
#define RPC_SIGNATURE_s_v UINT64_C(0x09c16a1242049b80)
#define RPC_SIGNATURE_v_s UINT64_C(0xc1746990ab73ed24)
static
rpc_call rpc_new_call(const char *signature, rpc_function function) {
if( signature && function ) {
array(char*)tokens = strsplit(signature, "(,)");
if( array_count(tokens) >= 1 ) {
char *method = strrchr(tokens[0], ' ')+1;
char *rettype = va("%.*s", (int)(method - tokens[0] - 1), tokens[0]);
int num_args = array_count(tokens) - 1;
char* hash_sig = va("%s(%s)", rettype, num_args ? (array_pop_front(tokens), strjoin(tokens, ",")) : "void");
uint64_t hash = hash_str(hash_sig);
method = va("%s%d", method, num_args );
#if RPC_DEBUG
printf("%p %p %s `%s` %s(", function, (void*)hash, rettype, hash_sig, method); for(int i = 0, end = array_count(tokens); i < end; ++i) printf("%s%s", tokens[i], i == (end-1)? "":", "); puts(");");
#endif
return (rpc_call) { strdup(method), function, hash }; // LEAK
}
}
return (rpc_call) {0};
}
static map(char*, rpc_call) rpc_calls = 0;
static
void rpc_insert(const char *signature, void *function ) {
rpc_call call = rpc_new_call(signature, function);
if( call.method ) {
if( !rpc_calls ) map_init(rpc_calls, less_str, hash_str);
if( map_find(rpc_calls, call.method)) {
map_erase(rpc_calls, call.method);
}
map_insert(rpc_calls, call.method, call);
}
}
static
char *rpc_full(unsigned id, const char* method, unsigned num_args, char *args[]) {
#if RPC_DEBUG
printf("id:%x method:%s args:", id, method );
for( int i = 0; i < num_args; ++i ) printf("%s,", args[i]); puts("");
#endif
method = va("%s%d", method, num_args);
rpc_call *found = map_find(rpc_calls, (char*)method);
if( found ) {
switch(found->function_hash) {
case RPC_SIGNATURE_i_iii: return va("%d %d", id, (int)(intptr_t)found->function(atoi(args[0]), atoi(args[1]), atoi(args[2])) );
case RPC_SIGNATURE_i_ii: return va("%d %d", id, (int)(intptr_t)found->function(atoi(args[0]), atoi(args[1])) );
case RPC_SIGNATURE_i_s: return va("%d %d", id, (int)(intptr_t)found->function(args[0]) );
case RPC_SIGNATURE_s_s: return va("%d %s", id, (char*)found->function(args[0]) );
case RPC_SIGNATURE_s_v: return va("%d %s", id, (char*)found->function() );
case RPC_SIGNATURE_v_s: return found->function(args[0]), va("%d", id);
default: break;
}
}
return va("%d -1", id);
}
static
array(char*) rpc_parse_args( const char *cmdline, bool quote_whitespaces ) { // parse cmdline arguments. must array_free() after use
// - supports quotes: "abc" "abc def" "abc \"def\"" "abc \"def\"""ghi" etc.
// - #comments removed
array(char*) args = 0; // LEAK
for( int i = 0; cmdline[i]; ) {
char buf[256] = {0}, *ptr = buf;
while(cmdline[i] && isspace(cmdline[i])) ++i;
bool quoted = cmdline[i] == '\"';
if( quoted ) {
while(cmdline[++i]) {
char ch = cmdline[i];
/**/ if (ch == '\\' && cmdline[i + 1] == '\"') *ptr++ = '\"', ++i;
else if (ch == '\"' && cmdline[i + 1] == '\"') ++i;
else if (ch == '\"' && (!cmdline[i + 1] || isspace(cmdline[i + 1]))) {
++i; break;
}
else *ptr++ = ch;
}
} else {
while(cmdline[i] && !isspace(cmdline[i])) *ptr++ = cmdline[i++];
}
if (buf[0] && buf[0] != '#') { // exclude empty args + comments
if( quote_whitespaces && quoted )
array_push(args, va("\"%s\"",buf));
else
array_push(args, va("%s",buf));
}
}
return args;
}
static
char* rpc(unsigned id, const char* cmdline) {
array(char*) args = rpc_parse_args(cmdline, false);
int num_args = array_count(args);
char *ret = num_args ? rpc_full(id, args[0], num_args - 1, &args[1]) : rpc_full(id, "", 0, NULL);
array_free(args);
return ret;
}
static void enet_quit(void) {
do_once {
// enet_deinitialize();
}
}
static void enet_init() {
do_once {
if( enet_initialize() != 0 ) {
PANIC("cannot initialize enet");
}
atexit( enet_quit );
}
}
struct peer_node_t {
int64_t id;
struct peer_node_t *next;
};
static ENetHost *Server;
static map(ENetPeer *, int64_t) clients;
static map(int64_t, ENetPeer *) peers;
static int64_t next_client_id = 1; // assumes ID 0 is server
static struct peer_node_t *next_free_id = NULL;
enum { MSG_INIT, MSG_BUF, MSG_RPC, MSG_RPC_RESP };
bool server_bind(int max_clients, int port) {
map_init(clients, less_64, hash_64);
map_init(peers, less_64, hash_64);
assert(port == 0 || (port > 1024 && port < 65500));
ENetAddress address = {0};
address.host = ENET_HOST_ANY;
address.port = port;
Server = enet_host_create(&address, max_clients, 2 /*channels*/, 0 /*in bandwidth*/, 0 /*out bandwidth*/);
return Server != NULL;
}
static
void server_drop_client(int64_t handle) {
map_erase(clients, *(ENetPeer **)map_find(peers, handle));
map_erase(peers, *(int64_t *)handle);
}
static
void server_drop_client_peer(ENetPeer *peer) {
struct peer_node_t *node = C_CAST(struct peer_node_t *, CALLOC(sizeof(struct peer_node_t), 1));
node->id = *(int64_t *)map_find(clients, peer);
if (!next_free_id) {
next_free_id = node;
} else {
node->next = next_free_id;
next_free_id = node;
}
map_erase(peers, *(int64_t *)map_find(clients, peer));
map_erase(clients, peer);
}
void server_broadcast_bin_flags(const void *msg, int len, uint64_t flags) {
ENetPacket *packet = enet_packet_create(msg, len, flags&NETWORK_UNRELIABLE ? ENET_PACKET_FLAG_UNRELIABLE_FRAGMENT : ENET_PACKET_FLAG_RELIABLE | flags&(NETWORK_UNRELIABLE|NETWORK_UNORDERED) ? ENET_PACKET_FLAG_UNSEQUENCED : 0);
enet_host_broadcast(Server, 0, packet);
}
void server_broadcast_bin(const void *msg, int len) {
ENetPacket *packet = enet_packet_create(msg, len, ENET_PACKET_FLAG_RELIABLE);
enet_host_broadcast(Server, 0, packet);
//enet_host_flush(Server); // flush if needed
}
void server_broadcast_flags(const char *msg, uint64_t flags) {
server_broadcast_bin_flags(msg, strlen(msg)+1, flags);
}
void server_broadcast(const char *msg) {
server_broadcast_bin(msg, strlen(msg)+1);
}
void server_terminate() {
enet_host_destroy(Server);
Server = 0;
}
volatile int client_join_connected = 0;
static int client_join_threaded(void *userdata) {
ENetHost *host = (ENetHost *)userdata;
ENetPacket *packet = enet_packet_create("", 1, ENET_PACKET_FLAG_RELIABLE);
enet_host_broadcast(Server, 0, packet);
/* Wait up to 5 seconds for the connection attempt to succeed. */
ENetEvent event;
client_join_connected = 0;
client_join_connected = enet_host_service(host, &event, 5000) > 0 && event.type == ENET_EVENT_TYPE_CONNECT;
return 0;
}
int64_t client_join(const char *ip, int port) {
assert(port > 1024 && port < 65500);
ENetAddress address = {0};
enet_address_set_host(&address, !strcmp(ip, "localhost") ? "127.0.0.1" : ip);
address.port = port;
ENetHost *host = enet_host_create(NULL, 1 /*outgoing connections*/, 2 /*channels*/, 0 /*in bandwidth*/, 0 /*out bandwidth*/);
if(!host) return -1;
ENetPeer *peer = enet_host_connect(host, &address, 2, 0);
if(!peer) return -1;
Server = host;
ENetEvent event;
bool client_join_connected = enet_host_service(host, &event, 5000) > 0 && event.type == ENET_EVENT_TYPE_CONNECT;
if(!client_join_connected) { enet_peer_reset(peer); return -1; }
// wait for the response
bool msg_received = enet_host_service(host, &event, 5000) > 0 && event.type == ENET_EVENT_TYPE_RECEIVE;
if (!msg_received) { enet_peer_reset(peer); return -1; }
char *ptr = (char *)event.packet->data;
int64_t cid = -1;
// decapsulate incoming packet.
uint32_t mid = *(uint32_t*)(ptr + 0);
ptr += 4;
switch (mid) {
case MSG_INIT:
cid = *(int64_t*)ptr;
break;
default:
enet_peer_reset(peer);
enet_packet_destroy( event.packet );
return -1;
}
/* Clean up the packet now that we're done using it. */
enet_packet_destroy( event.packet );
return cid;
}
void server_drop(int64_t handle) {
enet_peer_disconnect_now(*(ENetPeer **)map_find(peers, handle), 0);
server_drop_client(handle);
}
void server_send_bin(int64_t handle, const void *ptr, int len) {
ENetPacket *packet = enet_packet_create(ptr, len, ENET_PACKET_FLAG_RELIABLE);
enet_peer_send(*(ENetPeer **)map_find(peers, handle), 0, packet);
}
void server_send(int64_t handle, const char *msg) {
server_send_bin(handle, msg, strlen(msg)+1);
}
// ---
typedef struct netbuffer_t {
int64_t owner;
void *ptr;
unsigned sz;
uint64_t flags;
} netbuffer_t;
static array(char*) events; // @todo: make event 128 bytes max?
static array(int64_t) values; // @todo: map<key,values> instead?
static map( int64_t, array(netbuffer_t) ) buffers; // map<client,array<netbuffer>>
static double msg_send_cooldown = 0.0;
static double network_dt = 0.0;
static double last_netsync = 0.0;
void network_create(unsigned max_clients, const char *ip, const char *port_, unsigned flags) {
if (buffers) map_clear(buffers);
do_once {
array_resize(values, 128);
map_init(buffers, less_64, hash_64);
enet_init();
}
ip = ip ? ip : "0.0.0.0";
int port = atoi(port_ ? port_ : "1234");
// network_put(NETWORK_IP, 0x7F000001); // 127.0.0.1
network_put(NETWORK_PORT, port);
network_put(NETWORK_LIVE, -1);
network_put(NETWORK_COUNT, 0);
network_put(NETWORK_CAPACITY, max_clients);
network_put(NETWORK_BUF_CLEAR_ON_JOIN, 1);
if( !(flags&NETWORK_CONNECT) || flags&NETWORK_BIND ) {
// server, else client
PRINTF("Trying to bind server, else we connect as a client...\n");
network_put(NETWORK_RANK, 0);
if( server_bind(max_clients, port) ) {
network_put(NETWORK_LIVE, 1);
PRINTF("Server bound\n");
} else {
network_put(NETWORK_RANK, -1); /* unassigned until we connect successfully */
int64_t socket = client_join(ip, port);
if( socket >= 0 ) {
PRINTF("Client connected, id %lld\n", socket);
network_put(NETWORK_LIVE, 1);
network_put(NETWORK_RANK, socket);
} else {
PRINTF("!Client conn failed\n");
network_put(NETWORK_LIVE, 0);
if (!(flags&NETWORK_NOFAIL))
PANIC("cannot neither connect to %s:%d, nor create a server", ip, port);
}
}
} else {
// client only
PRINTF("Connecting to server...\n");
network_put(NETWORK_RANK, -1); /* unassigned until we connect successfully */
int64_t socket = client_join(ip, port);
if( socket > 0 ) {
PRINTF("Client connected, id %lld\n", socket);
network_put(NETWORK_LIVE, 1);
network_put(NETWORK_RANK, socket);
} else {
PRINTF("!Client conn failed\n");
network_put(NETWORK_LIVE, 0);
if (!(flags&NETWORK_NOFAIL))
PANIC("cannot connect to server %s:%d", ip, port);
}
}
PRINTF("Network rank:%lld ip:%s port:%lld\n", network_get(NETWORK_RANK), ip, network_get(NETWORK_PORT));
}
int64_t network_put(uint64_t key, int64_t value) {
int64_t *found = key < array_count(values) ? &values[key] : NULL;
if(found) *found = value;
return value;
}
int64_t network_get(uint64_t key) {
int64_t *found = key < array_count(values) ? &values[key] : NULL;
return found ? *found : 0;
}
void* network_buffer(void *ptr, unsigned sz, uint64_t flags, int64_t rank) {
assert(flags);
array(netbuffer_t) *found = map_find_or_add(buffers, rank, NULL);
netbuffer_t nb;
nb.owner = rank;
nb.ptr = ptr;
nb.sz = sz;
nb.flags = flags;
array_push(*found, nb);
return ptr;
}
static
int enet_event_to_netsync(int ev) {
switch (ev) {
case ENET_EVENT_TYPE_CONNECT: return NETWORK_EVENT_CONNECT;
case ENET_EVENT_TYPE_DISCONNECT: return NETWORK_EVENT_DISCONNECT;
case ENET_EVENT_TYPE_RECEIVE: return NETWORK_EVENT_RECEIVE;
case ENET_EVENT_TYPE_DISCONNECT_TIMEOUT: return NETWORK_EVENT_DISCONNECT_TIMEOUT;
}
/* passthrough for our own events */
return ev;
}
char** network_sync(unsigned timeout_ms) {
int64_t whoami = network_get(NETWORK_RANK);
bool is_server = whoami == 0;
bool is_client = !is_server;
if(timeout_ms < 2) timeout_ms = 2;
network_dt = time_ss() - last_netsync;
last_netsync = time_ss();
// Split buffers into clients @todo
// clients need to do this before network polling; servers should do this after polling.
if (msg_send_cooldown <= 0.0) {
map_foreach(buffers, int64_t, rank, array(netbuffer_t), list) {
for(int i = 0, end = array_count(list); i < end; ++i) {
netbuffer_t *nb = &list[i];
if (!is_server && !(nb->flags & NETWORK_SEND))
continue;
static array(char) encapsulate;
array_resize(encapsulate, nb->sz + 28);
uint32_t *mid = (uint32_t*)&encapsulate[0]; *mid = MSG_BUF;
uint64_t *st = (uint64_t*)&encapsulate[4]; *st = nb->flags;
uint32_t *idx = (uint32_t*)&encapsulate[12]; *idx = i;
uint32_t *len = (uint32_t*)&encapsulate[16]; *len = nb->sz;
uint64_t *who = (uint64_t*)&encapsulate[20]; *who = nb->owner;
// PRINTF("sending %llx %u %lld %u\n", *st, *idx, *who, *len);
memcpy(&encapsulate[28], nb->ptr, nb->sz);
server_broadcast_bin(&encapsulate[0], nb->sz + 28);
}
}
msg_send_cooldown = (double)network_get(NETWORK_SEND_MS)/1000.0;
} else {
msg_send_cooldown -= network_dt;
}
if (is_server) {
return server_poll(timeout_ms);
} else {
return client_poll(timeout_ms);
}
}
char** server_poll(unsigned timeout_ms) {
array_clear(events);
if(timeout_ms < 2) timeout_ms = 2;
// network poll
for( ENetEvent event; Server && enet_host_service(Server, &event, timeout_ms) > 0; ) {
char *msg = 0;
char ip[128]; enet_peer_get_ip(event.peer, ip, 128);
switch (event.type) {
default: // case ENET_EVENT_TYPE_NONE:
break;
case ENET_EVENT_TYPE_CONNECT:;
/* ensure we have free slot for client */
if (map_count(clients) >= network_get(NETWORK_CAPACITY)-1) {
msg = va("%d Server is at maximum capacity, disconnecting the peer (::%s:%u)...", 1, ip, event.peer->address.port);
enet_peer_disconnect_now(event.peer, 1);
break;
}
int64_t client_id = -1;
if (next_free_id) {
struct peer_node_t *node = next_free_id;
client_id = next_free_id->id;
next_free_id = next_free_id->next;
FREE(node);
}
else client_id = next_client_id++;
// if (network_get(NETWORK_BUF_CLEAR_ON_JOIN)) {
// array(netbuffer_t) *list = map_find(buffers, client_id);
// if (list)
// for(int i = 0, end = array_count(list); i < end; ++i) {
// netbuffer_t *nb = &list[i];
// memset(nb->ptr, 0, nb->sz);
// }
// }
map_find_or_add(clients, event.peer, client_id);
map_find_or_add(peers, client_id, event.peer);
network_put(NETWORK_COUNT, network_get(NETWORK_COUNT)+1);
// send server slot
char init_msg[12];
*(uint32_t*)&init_msg[0] = MSG_INIT;
*(int64_t*)&init_msg[4] = client_id;
server_send_bin(client_id, init_msg, 12);
PRINTF("Client rank %lld for peer ::%s:%u\n", client_id, ip, event.peer->address.port);
msg = va( "%d new client rank:%lld from ::%s:%u", 0, client_id, ip, event.peer->address.port );
event.peer->data = (void*)client_id;
break;
case ENET_EVENT_TYPE_RECEIVE: {
char *dbg = (char *)event.peer->data;
char *ptr = (char *)event.packet->data;
unsigned sz = (unsigned)event.packet->dataLength;
unsigned id = (unsigned)event.channelID;
// debug
// puts(dbg);
// hexdump(ptr, sz);
// decapsulate incoming packet.
uint32_t mid = *(uint32_t*)(ptr + 0);
ptr += 4;
switch (mid) {
case MSG_BUF: {
uint64_t *flags = (uint64_t*)(ptr + 0);
uint32_t *idx = (uint32_t*)(ptr + 8);
uint32_t *len = (uint32_t*)(ptr + 12);
uint64_t *who = (uint64_t*)(ptr + 16);
ptr += 24;
// validate if peer owns the buffer
int64_t *cid = map_find(clients, event.peer);
uint8_t client_valid = cid ? *cid == *who : 0;
// apply incoming packet.
if( client_valid ) {
array(netbuffer_t) *list = map_find(buffers, *who);
assert( list );
assert( *idx < array_count(*list) );
netbuffer_t *nb = &(*list)[*idx];
assert( *len == nb->sz );
memcpy(nb->ptr, ptr, *len);
}
} break;
case MSG_RPC: {
event.type = NETWORK_EVENT_RPC;
unsigned id = *(uint32_t*)ptr; ptr += 4;
char *cmdline = ptr;
char *resp = rpc(id, cmdline);
char *resp_msg = MALLOC(strlen(resp) + 6);
*(uint32_t*)&resp_msg[0] = MSG_RPC_RESP;
memcpy(&resp_msg[4], resp, strlen(resp)+1);
ENetPacket *packet = enet_packet_create(resp_msg, strlen(resp) + 5, ENET_PACKET_FLAG_RELIABLE);
enet_peer_send(event.peer, 0, packet);
msg = va("%d req:%s res:%s", 0, cmdline, resp);
FREE(resp_msg);
} break;
case MSG_RPC_RESP: {
event.type = NETWORK_EVENT_RPC_RESP;
msg = va("%d %s", 0, va("%s", ptr));
} break;
default:
msg = va("%d unk msg len:%u from rank:%lld ::%s:%u", -1, sz, (uint64_t)event.peer->data, ip, event.peer->address.port); /* @TODO: hexdump? */
break;
}
/* Clean up the packet now that we're done using it. */
enet_packet_destroy( event.packet );
} break;
case ENET_EVENT_TYPE_DISCONNECT:
msg = va( "%d disconnect rank:%lld", 0, (uint64_t)event.peer->data);
/* Reset the peer's client information. */
FREE(event.peer->data);
event.peer->data = NULL;
server_drop_client_peer(event.peer);
network_put(NETWORK_COUNT, network_get(NETWORK_COUNT)-1);
break;
case ENET_EVENT_TYPE_DISCONNECT_TIMEOUT:
msg = va( "%d timeout rank:%lld", 0, (uint64_t)event.peer->data);
FREE(event.peer->data);
event.peer->data = NULL;
server_drop_client_peer(event.peer);
network_put(NETWORK_COUNT, network_get(NETWORK_COUNT)-1);
break;
}
if(msg) array_push(events, va("%d %s", enet_event_to_netsync(event.type), msg));
}
array_push(events, NULL);
return events;
}
char** client_poll(unsigned timeout_ms) {
array_clear(events);
int64_t whoami = network_get(NETWORK_RANK);
if(timeout_ms < 2) timeout_ms = 2;
// network poll
for( ENetEvent event; Server && enet_host_service(Server, &event, timeout_ms) > 0; ) {
char *msg = 0;
char ip[128]; enet_peer_get_ip(event.peer, ip, 128);
switch (event.type) {
default: // case ENET_EVENT_TYPE_NONE:
break;
case ENET_EVENT_TYPE_CONNECT:
break;
case ENET_EVENT_TYPE_RECEIVE: {
char *dbg = (char *)event.peer->data;
char *ptr = (char *)event.packet->data;
unsigned sz = (unsigned)event.packet->dataLength;
unsigned id = (unsigned)event.channelID;
// decapsulate incoming packet.
uint32_t mid = *(uint32_t*)(ptr + 0);
ptr += 4;
switch (mid) {
case MSG_INIT:
/* handled by client_join */
break;
case MSG_BUF: {
uint64_t *flags = (uint64_t*)(ptr + 0);
uint32_t *idx = (uint32_t*)(ptr + 8);
uint32_t *len = (uint32_t*)(ptr + 12);
uint64_t *who = (uint64_t*)(ptr + 16);
ptr += 24;
// apply incoming packet.
if( *who != whoami ) {
array(netbuffer_t) *list = map_find(buffers, *who);
assert( list );
assert( *idx < array_count(*list) );
netbuffer_t *nb = &(*list)[*idx];
assert( *len == nb->sz );
memcpy(nb->ptr, ptr, *len);
}
} break;
case MSG_RPC: {
event.type = NETWORK_EVENT_RPC;
unsigned id = *(uint32_t*)ptr; ptr += 4;
char *cmdline = ptr;
char *resp = rpc(id, cmdline);
char *resp_msg = MALLOC(strlen(resp) + 6);
*(uint32_t*)&resp_msg[0] = MSG_RPC_RESP;
memcpy(&resp_msg[4], resp, strlen(resp)+1);
ENetPacket *packet = enet_packet_create(resp_msg, strlen(resp) + 5, ENET_PACKET_FLAG_RELIABLE);
enet_peer_send(event.peer, 0, packet);
msg = va("%d req:%s res:%s", 0, cmdline, resp);
FREE(resp_msg);
} break;
case MSG_RPC_RESP: {
event.type = NETWORK_EVENT_RPC_RESP;
msg = va("%d %s", 0, ptr);
} break;
default:
msg = va("%d unk msg len:%u from server", -1, sz); /* @TODO: hexdump? */
break;
}
/* Clean up the packet now that we're done using it. */
enet_packet_destroy( event.packet );
} break;
case ENET_EVENT_TYPE_DISCONNECT:
msg = va( "%d disconnect", 0 );
/* Reset the peer's client information. */
FREE(event.peer->data);
event.peer->data = NULL;
network_put(NETWORK_RANK, -1);
network_put(NETWORK_LIVE, 0);
break;
case ENET_EVENT_TYPE_DISCONNECT_TIMEOUT:
msg = va( "%d timeout", 0);
FREE(event.peer->data);
event.peer->data = NULL;
network_put(NETWORK_RANK, -1);
network_put(NETWORK_LIVE, 0);
break;
}
if(msg) array_push(events, va("%d %s", enet_event_to_netsync(event.type), msg));
}
array_push(events, NULL);
return events;
}
int network_event(const char *msg, int *errcode, char **errstr) {
int evid = -1;
int err = 0;
char errbuf[128] = {0};
sscanf(msg, "%d %d %127[^\r\n]", &evid, &err, errbuf);
if (errcode) *errcode = err;
if (errstr) *errstr = va("%s", errbuf);
return evid;
}
void network_rpc(const char *signature, void *function) {
rpc_insert(signature, function);
}
void network_rpc_send_to(int64_t rank, unsigned id, const char *cmdline) {
assert(network_get(NETWORK_RANK) == 0); /* must be a host */
unsigned sz = strlen(cmdline) + 9;
char *msg = MALLOC(sz);
*(uint32_t*)&msg[0] = MSG_RPC;
*(uint32_t*)&msg[4] = id;
memcpy(&msg[8], cmdline, sz-8);
server_send_bin(rank, msg, sz);
FREE(msg);
}
void network_rpc_send(unsigned id, const char *cmdline) {
unsigned sz = strlen(cmdline) + 9;
char *msg = MALLOC(sz);
*(uint32_t*)&msg[0] = MSG_RPC;
*(uint32_t*)&msg[4] = id;
memcpy(&msg[8], cmdline, sz-8);
server_broadcast_bin(msg, sz);
FREE(msg);
}
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