void exec_client_process(int (*socket_pairs)[2], int index) {
pid_t pid = fork();
if (pid == 0) {
const int client_num = get_client_count();
close_all_client_fd_except(socket_pairs, client_num, index);
close_all_server_fd(socket_pairs, client_num);
move_fd(server_fd, socket_pairs[index][kFdConnectToClient]);
execv(get_client_name(index), NULL);
exit(0);
}
}
void exec_server_process(int (*socket_pairs)[2]) {
pid_t pid = fork();
if (pid == 0) {
const int client_num = get_client_count();
close_all_client_fd_except(socket_pairs, client_num, -1);
for (int i = 0; i < client_num; i++) {
move_fd(client_fd(i), socket_pairs[i][kFdConnectToServer]);
}
execv(get_server_name(), NULL);
exit(0);
}
}
/*
* Send a status update to all connected clients
*/
void broadcast_status() {
struct cl_entry *current;
struct net_status *status;
uint8_t dcount;
uint16_t scount;
uint8_t tcount;
uint8_t permission;
int ret;
/*
* Start iteration over complete client list
* This locks the mutex for the client list
*/
current = start_iteration();
/* Get number of users */
dcount = docent_exists();
tcount = tutor_exists();
scount = get_client_count() - dcount - tcount;
while (current != NULL) {
if (current == get_write_user()) {
permission = 1;
} else {
permission = 0;
}
/* Build the status message */
status = build_status(current->cdata->role, current->cdata->cid,
permission, dcount, tcount, scount);
ret = send(current->cdata->sfd, status, sizeof(struct net_status), 0);
if (ret < 0) {
perror("send");
}
free(status);
/* Select next client in list */
current = iteration_next();
}
log_debug("broadcasting agent: status sent to all connected clients");
/*
* End of iteration
* This unlocks the mutex of the client list
*/
end_iteration();
}
char *lst_json(struct client **lst){
cJSON *root,*root_object,*root_object_array;
root = cJSON_CreateArray();
root_object=cJSON_CreateObject();
cJSON_AddItemToArray(root,root_object);
root_object_array = cJSON_CreateArray();
cJSON_AddStringToObject(root_object, "request", "count_client");
cJSON_AddNumberToObject(root_object, "data", get_client_count());
cJSON_AddItemToObject(root_object, "users", root_object_array);
if(new_user)
cJSON_AddStringToObject(root_object, "user_changed", new_user);
cJSON *prev=NULL;
while( *lst != NULL )
{
cJSON *root_object_array_object = cJSON_CreateObject();
cJSON_AddStringToObject(root_object_array_object, "user", (*lst)->name);
cJSON_AddStringToObject(root_object_array_object, "id", (*lst)->session_id);
cJSON_AddNumberToObject(root_object_array_object, "gid", (*lst)->gid);
if (!prev) root_object_array->child = root_object_array_object;
else prev->next = root_object_array_object, root_object_array_object->prev = prev;
prev = root_object_array_object;
lst = &(*lst)->next;
}
char *json=NULL;
json = (char *) malloc (sizeof(cJSON_Print(root)));
json=cJSON_Print(root);
free(root);free(root_object);free(root_object_array);
return json;
}
int main(int argc, char **argv)
{
daemonize();
//saveData("admin",100,100,"admin");
config_obj=parseConfigFile();
ipWhitelist = cJSON_GetObjectItem(config_obj,"ipWhitelist");
wiringPiSetup();
pinDirections = cJSON_GetObjectItem(config_obj,"pinDirections");
handlePinsDirection(pinDirections);
signal(SIGINT, sighandler);
struct lws_context_creation_info info;
unsigned int ms, oldms= 0;
const char *iface = NULL;
char cert_path[1024];
char key_path[1024];
int use_ssl = 0;
int opts = 0;
int n = 0;
/*
* take care to zero down the info struct, he contains random garbaage
* from the stack otherwise
*/
memset(&info, 0, sizeof info);
info.port = 7681;
signal(SIGINT, sighandler);
info.iface = iface;
info.protocols = protocols;
info.ssl_cert_filepath = NULL;
info.ssl_private_key_filepath = NULL;
if (use_ssl) {
if (strlen(resource_path) > sizeof(cert_path) - 32) {
lwsl_err("resource path too long\n");
return -1;
}
sprintf(cert_path, "%s/libwebsockets-test-server.pem",
resource_path);
if (strlen(resource_path) > sizeof(key_path) - 32) {
lwsl_err("resource path too long\n");
return -1;
}
sprintf(key_path, "%s/libwebsockets-test-server.key.pem",
resource_path);
info.ssl_cert_filepath = cert_path;
info.ssl_private_key_filepath = key_path;
}
info.gid = -1;
info.uid = -1;
info.max_http_header_pool = 1;
info.options = opts | LWS_SERVER_OPTION_VALIDATE_UTF8;
info.extensions = NULL;
context = lws_create_context(&info);
if (context == NULL) {
lwsl_err("libwebsocket init failed\n");
return -1;
}
n = 0;
while (n >= 0 && !force_exit) {
struct timeval tv;
gettimeofday(&tv, NULL);
/*
* This provokes the LWS_CALLBACK_SERVER_WRITEABLE for every
* live websocket connection using the DUMB_INCREMENT protocol,
* as soon as it can take more packets (usually immediately)
*/
extern struct ram_usage ram_l;
extern struct cpu_live cpu_l;
extern struct cpu_freq cpu_freq;
if(old_client_count!=client_count){
if(hash){
free(hash);
}
hash=rand_string();
lws_callback_on_writable_all_protocol(context,
&protocols[PROTOCOL_GPIO]);
lws_callback_on_writable_all_protocol(context,
&protocols[PROTOCOL_DETAILS]);
lws_callback_on_writable_all_protocol(context,
&protocols[PROTOCOL_SERVICES]);
lws_callback_on_writable_all_protocol(context,
&protocols[PROTOCOL_HOME]);
old_client_count=client_count;
}
ms = (tv.tv_sec * 1000) + (tv.tv_usec / 1000);
if ((ms - oldms) > 200 && get_client_count()>0 && (cpuLive(&cpu_l,5)==0 && ramLive(&ram_l,5)==0 && cpuLiveFreq(&cpu_freq)==0 )) {
lws_callback_on_writable_all_protocol(context,
&protocols[PROTOCOL_DETAILS]);
oldms = ms;
}
n = lws_service(context, 50);
}
lws_context_destroy(context);
lwsl_notice("libwebsockets-test-server exited cleanly\n");
return 0;
}
/*
* We will eventually be called from inetd or via the rc scripts directly
* Parse arguments and act appropiately.
*/
int
main(int argc, char **argv)
{
extern char *optarg;
FILE *fp;
int c, *s, ns;
struct pollfd *pfds;
#if PROFILE
moncontrol(0);
#endif
if ((progname = strrchr(*argv, '/')) != NULL) {
progname++;
} else
progname = *argv;
/* initialise global session data */
memset(&session, 0, sizeof(session));
session.peer = tac_strdup("unknown");
if (argc <= 1) {
usage();
tac_exit(1);
}
while ((c = getopt(argc, argv, "B:C:d:hiPp:tGgvSsLw:u:")) != EOF)
switch (c) {
case 'B': /* bind() address*/
bind_address = optarg;
break;
case 'L': /* lookup peer names via DNS */
lookup_peer = 1;
break;
case 's': /* don't respond to sendpass */
sendauth_only = 1;
break;
case 'v': /* print version and exit */
vers();
tac_exit(1);
case 't':
console = 1; /* log to console too */
break;
case 'P': /* Parse config file only */
parse_only = 1;
break;
case 'G': /* foreground */
opt_G = 1;
break;
case 'g': /* single threaded */
single = 1;
break;
case 'p': /* port */
port = atoi(optarg);
portstr = optarg;
break;
case 'd': /* debug */
debug |= atoi(optarg);
break;
case 'C': /* config file name */
session.cfgfile = tac_strdup(optarg);
break;
case 'h': /* usage */
usage();
tac_exit(0);
case 'i': /* inetd mode */
standalone = 0;
break;
case 'S': /* enable single-connection */
opt_S = 1;
break;
#ifdef MAXSESS
case 'w': /* wholog file */
wholog = tac_strdup(optarg);
break;
#endif
case 'u':
wtmpfile = tac_strdup(optarg);
break;
default:
fprintf(stderr, "%s: bad switch %c\n", progname, c);
usage();
tac_exit(1);
}
parser_init();
/* read the configuration/etc */
init();
#if defined(REAPCHILD) && defined(REAPSIGIGN)
client_count_init();
#endif
open_logfile();
signal(SIGUSR1, handler);
signal(SIGHUP, handler);
signal(SIGUSR2, dump_clients_handler);
signal(SIGTERM, die);
signal(SIGPIPE, SIG_IGN);
if (parse_only)
tac_exit(0);
if (debug)
report(LOG_DEBUG, "tac_plus server %s starting", version);
if (!standalone) {
/* running under inetd */
char host[NI_MAXHOST];
int on;
#ifdef IPV6
struct sockaddr_in6 name;
#else
struct sockaddr_in name;
#endif
socklen_t name_len;
name_len = sizeof(name);
session.flags |= SESS_NO_SINGLECONN;
session.sock = 0;
#ifdef IPV6
if (getpeername(session.sock, (struct sockaddr6 *)&name, &name_len)) {
report(LOG_ERR, "getpeername failure %s", strerror(errno));
#else
if (getpeername(session.sock, (struct sockaddr *)&name, &name_len)) {
report(LOG_ERR, "getpeername failure %s", strerror(errno));
#endif
} else {
if (lookup_peer)
on = 0;
else
on = NI_NUMERICHOST;
#ifdef IPV6
if (getnameinfo((struct sockaddr6 *)&name, name_len, host, 128,
NULL, 0, on)) {
#else
if (getnameinfo((struct sockaddr *)&name, name_len, host, 128,
NULL, 0, on)) {
#endif
strncpy(host, "unknown", NI_MAXHOST - 1);
host[NI_MAXHOST - 1] = '\0';
}
if (session.peer) free(session.peer);
session.peer = tac_strdup(host);
if (session.peerip) free(session.peerip);
#ifdef IPV6
session.peerip = tac_strdup((char *)inet_ntop(name.sin6_family,
&name.sin6_addr, host, name_len));
#else
session.peerip = tac_strdup((char *)inet_ntop(name.sin_family,
&name.sin_addr, host, name_len));
#endif
if (debug & DEBUG_AUTHEN_FLAG)
report(LOG_INFO, "session.peerip is %s", session.peerip);
}
#ifdef FIONBIO
on = 1;
if (ioctl(session.sock, FIONBIO, &on) < 0) {
report(LOG_ERR, "ioctl(FIONBIO) %s", strerror(errno));
tac_exit(1);
}
#endif
start_session();
tac_exit(0);
}
if (single) {
session.flags |= SESS_NO_SINGLECONN;
} else {
/*
* Running standalone; background ourselves and release controlling
* tty, unless -G option was specified to keep the parent in the
* foreground.
*/
#ifdef SIGTTOU
signal(SIGTTOU, SIG_IGN);
#endif
#ifdef SIGTTIN
signal(SIGTTIN, SIG_IGN);
#endif
#ifdef SIGTSTP
signal(SIGTSTP, SIG_IGN);
#endif
if (!opt_S)
session.flags |= SESS_NO_SINGLECONN;
if (!opt_G) {
if ((childpid = fork()) < 0)
report(LOG_ERR, "Can't fork first child");
else if (childpid > 0)
exit(0); /* parent */
if (debug)
report(LOG_DEBUG, "Backgrounded");
#if SETPGRP_VOID
if (setpgrp() == -1)
#else
if (setpgrp(0, getpid()) == -1)
#endif /* SETPGRP_VOID */
report(LOG_ERR, "Can't change process group: %s",
strerror(errno));
/* XXX What does "REAPCHILD" have to do with TIOCNOTTY? */
#ifndef REAPCHILD
c = open("/dev/tty", O_RDWR);
if (c >= 0) {
ioctl(c, TIOCNOTTY, (char *)0);
(void) close(c);
}
#else /* REAPCHILD */
if ((childpid = fork()) < 0)
report(LOG_ERR, "Can't fork second child");
else if (childpid > 0)
exit(0);
if (debug & DEBUG_FORK_FLAG)
report(LOG_DEBUG, "Forked grandchild");
#endif /* REAPCHILD */
/* some systems require this */
closelog();
for (c = getdtablesize(); c >= 0; c--)
(void)close(c);
/*
* make sure we can still log to syslog now that we have closed
* everything
*/
open_logfile();
}
}
#if REAPCHILD
#if REAPSIGIGN
signal(SIGCHLD, reapchild);
#else
signal(SIGCHLD, SIG_IGN);
#endif
#endif
ostream = NULL;
/* chdir("/"); */
umask(022);
errno = 0;
get_socket(&s, &ns);
#ifndef SOMAXCONN
#define SOMAXCONN 5
#endif
for (c = 0; c < ns; c++) {
if (listen(s[c], SOMAXCONN) < 0) {
console = 1;
report(LOG_ERR, "listen: %s", strerror(errno));
tac_exit(1);
}
}
if (port == TAC_PLUS_PORT) {
if (bind_address == NULL) {
strncpy(pidfilebuf, TACPLUS_PIDFILE, PIDSZ);
if (pidfilebuf[PIDSZ - 1] != '\0')
c = PIDSZ;
else
c = PIDSZ - 1;
} else
c = snprintf(pidfilebuf, PIDSZ, "%s.%s", TACPLUS_PIDFILE,
bind_address);
} else {
if (bind_address == NULL)
c = snprintf(pidfilebuf, PIDSZ, "%s.%d", TACPLUS_PIDFILE, port);
else
c = snprintf(pidfilebuf, PIDSZ, "%s.%s.%d", TACPLUS_PIDFILE,
bind_address, port);
}
if (c >= PIDSZ) {
pidfilebuf[PIDSZ - 1] = '\0';
report(LOG_ERR, "pid filename truncated: %s", pidfilebuf);
childpid = 0;
} else {
/* write process id to pidfile */
if ((fp = fopen(pidfilebuf, "w")) != NULL) {
fprintf(fp, "%d\n", (int)getpid());
fclose(fp);
/*
* After forking to disassociate; make sure we know we're the
* mother so that we remove our pid file upon exit in die().
*/
childpid = 1;
} else {
report(LOG_ERR, "Cannot write pid to %s %s", pidfilebuf,
strerror(errno));
childpid = 0;
}
}
#ifdef TACPLUS_GROUPID
if (setgid(TACPLUS_GROUPID))
report(LOG_ERR, "Cannot set group id to %d %s",
TACPLUS_GROUPID, strerror(errno));
#endif
#ifdef TACPLUS_USERID
if (setuid(TACPLUS_USERID))
report(LOG_ERR, "Cannot set user id to %d %s",
TACPLUS_USERID, strerror(errno));
#endif
#ifdef MAXSESS
maxsess_loginit();
#endif /* MAXSESS */
report(LOG_DEBUG, "uid=%d euid=%d gid=%d egid=%d s=%d",
getuid(), geteuid(), getgid(), getegid(), s);
pfds = malloc(sizeof(struct pollfd) * ns);
if (pfds == NULL) {
report(LOG_ERR, "malloc failure: %s", strerror(errno));
tac_exit(1);
}
for (c = 0; c < ns; c++) {
pfds[c].fd = s[c];
pfds[c].events = POLLIN | POLLERR | POLLHUP | POLLNVAL;
}
for (;;) {
#if HAVE_PID_T
pid_t pid;
#else
int pid;
#endif
char host[NI_MAXHOST];
#ifdef IPV6
struct sockaddr_in6 from;
#else
struct sockaddr_in from;
#endif
socklen_t from_len;
int newsockfd, status;
int flags;
int procs_for_client;
#if defined(REAPCHILD) && defined(REAPSIGIGN)
if (reap_children)
reapchildren();
#endif
if (reinitialize)
init();
if (dump_client_table) {
report(LOG_ALERT, "Dumping Client Tables");
dump_client_tables();
dump_client_table = 0;
}
status = poll(pfds, ns, cfg_get_accepttimeout() * 1000);
if (status == 0)
continue;
if (status == -1)
if (errno == EINTR)
continue;
from_len = sizeof(from);
memset((char *)&from, 0, from_len);
for (c = 0; c < ns; c++) {
if (pfds[c].revents & POLLIN)
#ifdef IPV6
newsockfd = accept(s[c], (struct sockaddr6 *)&from, &from_len);
#else
newsockfd = accept(s[c], (struct sockaddr *)&from, &from_len);
#endif
else if (pfds[c].revents & (POLLERR | POLLHUP | POLLNVAL)) {
report(LOG_ERR, "exception on listen FD %d", s[c]);
tac_exit(1);
}
}
if (newsockfd < 0) {
if (errno == EINTR)
continue;
report(LOG_ERR, "accept: %s", strerror(errno));
continue;
}
if (lookup_peer)
flags = 0;
else
flags = NI_NUMERICHOST;
#ifdef IPV6
if (getnameinfo((struct sockaddr_in6 *)&from, from_len, host, 128, NULL, 0,
flags)) {
#else
if (getnameinfo((struct sockaddr_in *)&from, from_len, host, 128, NULL, 0,
flags)) {
#endif
strncpy(host, "unknown", NI_MAXHOST - 1);
host[NI_MAXHOST - 1] = '\0';
}
if (session.peer) free(session.peer);
session.peer = tac_strdup(host);
if (session.peerip) free(session.peerip);
#ifdef IPV6
session.peerip = tac_strdup((char *)inet_ntop(from.sin6_family,
&from.sin6_addr, host, INET6_ADDRSTRLEN));
#else
session.peerip = tac_strdup((char *)inet_ntop(from.sin_family,
&from.sin_addr, host, INET_ADDRSTRLEN));
#endif
if (debug & DEBUG_PACKET_FLAG)
report(LOG_DEBUG, "session request from %s sock=%d",
session.peer, newsockfd);
if (!single) {
#if defined(REAPCHILD) && defined(REAPSIGIGN)
/* first we check the tocal process count to see if we are at the limit */
if (total_child_count >= cfg_get_maxprocs()) {
report(LOG_ALERT, "refused connection from %s [%s] at global max procs [%d]",
session.peer, session.peerip, total_child_count);
shutdown(newsockfd, 2);
close(newsockfd);
continue;
}
/* no we check the process count per client */
procs_for_client = get_client_count(session.peerip);
report(LOG_ALERT, "connection [%d] from %s [%s]", procs_for_client + 1, session.peer, session.peerip);
if (procs_for_client >= cfg_get_maxprocsperclt()) {
report(LOG_ALERT, "refused connection from %s [%s] at client max procs [%d]",
session.peer, session.peerip, procs_for_client);
shutdown(newsockfd, 2);
close(newsockfd);
continue;
}
#endif
pid = fork();
if (pid < 0) {
report(LOG_ERR, "fork error");
tac_exit(1);
}
} else {
pid = 0;
}
if (pid == 0) {
/* child */
if (!single) {
if (ns > 1) {
for (c = 0; c < ns; c++) {
close(s[c]);
}
}
}
session.sock = newsockfd;
#ifdef LIBWRAP
if (! hosts_ctl(progname,session.peer,session.peerip,progname)) {
report(LOG_ALERT, "refused connection from %s [%s]",
session.peer, session.peerip);
shutdown(session.sock, 2);
close(session.sock);
if (!single) {
tac_exit(0);
} else {
close(session.sock);
continue;
}
}
if (debug)
report(LOG_DEBUG, "connect from %s [%s]", session.peer, session.peerip);
#endif
#if PROFILE
moncontrol(1);
#endif
start_session();
shutdown(session.sock, 2);
close(session.sock);
if (!single)
tac_exit(0);
} else {
/* parent */
#if defined(REAPCHILD) && defined(REAPSIGIGN)
total_child_count++;
procs_for_client = increment_client_count_for_proc(pid, session.peerip);
snprintf(msgbuf, MSGBUFSZ, "forked %lu for %s, procs %d, procs for client %d",
(long)pid, session.peerip, total_child_count, procs_for_client);
report(LOG_DEBUG, msgbuf);
#endif
close(newsockfd);
}
}
}
