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indiserver.c
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indiserver.c
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/* INDI Server for protocol version 1.7.
* Copyright (C) 2007 Elwood C. Downey <ecdowney@clearskyinstitute.com>
2013 Jasem Mutlaq <mutlaqja@ikarustech.com>
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
* argv lists names of Driver programs to run or sockets to connect for Devices.
* Drivers are restarted if they exit or connection closes.
* Each local Driver's stdin/out are assumed to provide INDI traffic and are
* connected here via pipes. Local Drivers' stderr are connected to our
* stderr with date stamp and driver name prepended.
* We only support Drivers that advertise support for one Device. The problem
* with multiple Devices in one Driver is without a way to know what they
* _all_ are there is no way to avoid sending all messages to all Drivers.
* Outbound messages are limited to Devices and Properties seen inbound.
* Messages to Devices on sockets always include Device so the chained
* indiserver will only pass back info from that Device.
* All newXXX() received from one Client are echoed to all other Clients who
* have shown an interest in the same Device and property.
*
* 2017-01-29 JM: Added option to drop stream blobs if client blob queue is
* higher than maxstreamsiz bytes
*
* Implementation notes:
*
* We fork each driver and open a server socket listening for INDI clients.
* Then forever we listen for new clients and pass traffic between clients and
* drivers, subject to optimizations based on sniffing messages for matching
* Devices and Properties. Since one message might be destined to more than
* one client or device, they are queued and only removed after the last
* consumer is finished. XMLEle are converted to linear strings before being
* sent to optimize write system calls and avoid blocking to slow clients.
* Clients that get more than maxqsiz bytes behind are shut down.
*/
#define _GNU_SOURCE // needed for siginfo_t and sigaction
#include "config.h"
#include "fq.h"
#include "indiapi.h"
#include "indidevapi.h"
#include "lilxml.h"
#include <errno.h>
#include <fcntl.h>
#include <libgen.h>
#include <netdb.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <arpa/inet.h>
#include <netinet/in.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include <sys/socket.h>
#define INDIPORT 7624 /* default TCP/IP port to listen */
#define REMOTEDVR (-1234) /* invalid PID to flag remote drivers */
#define MAXSBUF 512
#define MAXRBUF 49152 /* max read buffering here */
#define MAXWSIZ 49152 /* max bytes/write */
#define SHORTMSGSIZ 2048 /* buf size for most messages */
#define DEFMAXQSIZ 128 /* default max q behind, MB */
#define DEFMAXSSIZ 5 /* default max stream behind, MB */
#define DEFMAXRESTART 10 /* default max restarts */
#ifdef OSX_EMBEDED_MODE
#define LOGNAME "/Users/%s/Library/Logs/indiserver.log"
#define FIFONAME "/tmp/indiserverFIFO"
#endif
/* associate a usage count with queuded client or device message */
typedef struct
{
int count; /* number of consumers left */
unsigned long cl; /* content length */
char *cp; /* content: buf or malloced */
char buf[SHORTMSGSIZ]; /* local buf for most messages */
} Msg;
/* device + property name */
typedef struct
{
char dev[MAXINDIDEVICE];
char name[MAXINDINAME];
BLOBHandling blob; /* when to snoop BLOBs */
} Property;
/* record of each snooped property
typedef struct {
Property prop;
BLOBHandling blob;
} Property;
*/
struct
{
const char *name; /* Path to FIFO for dynamic startups & shutdowns of drivers */
int fd;
//FILE *fs;
} fifo;
/* info for each connected client */
typedef struct
{
int active; /* 1 when this record is in use */
Property *props; /* malloced array of props we want */
int nprops; /* n entries in props[] */
int allprops; /* saw getProperties w/o device */
BLOBHandling blob; /* when to send setBLOBs */
int s; /* socket for this client */
LilXML *lp; /* XML parsing context */
FQ *msgq; /* Msg queue */
unsigned int nsent; /* bytes of current Msg sent so far */
} ClInfo;
static ClInfo *clinfo; /* malloced pool of clients */
static int nclinfo; /* n total (not active) */
/* info for each connected driver */
typedef struct
{
char name[MAXINDINAME]; /* persistent name */
char envDev[MAXSBUF];
char envConfig[MAXSBUF];
char envSkel[MAXSBUF];
char envPrefix[MAXSBUF];
char host[MAXSBUF];
int port;
//char dev[MAXINDIDEVICE]; /* device served by this driver */
char **dev; /* device served by this driver */
int ndev; /* number of devices served by this driver */
int active; /* 1 when this record is in use */
Property *sprops; /* malloced array of props we snoop */
int nsprops; /* n entries in sprops[] */
int pid; /* process id or REMOTEDVR if remote */
int rfd; /* read pipe fd */
int wfd; /* write pipe fd */
int efd; /* stderr from driver, if local */
int restarts; /* times process has been restarted */
LilXML *lp; /* XML parsing context */
FQ *msgq; /* Msg queue */
unsigned int nsent; /* bytes of current Msg sent so far */
} DvrInfo;
static DvrInfo *dvrinfo; /* malloced array of drivers */
static int ndvrinfo; /* n total */
static char *me; /* our name */
static int port = INDIPORT; /* public INDI port */
static int verbose; /* chattiness */
static int lsocket; /* listen socket */
static char *ldir; /* where to log driver messages */
static int maxqsiz = (DEFMAXQSIZ * 1024 * 1024); /* kill if these bytes behind */
static int maxstreamsiz = (DEFMAXSSIZ * 1024 * 1024); /* drop blobs if these bytes behind while streaming*/
static int maxrestarts = DEFMAXRESTART;
static int terminateddrv = 0;
static void logStartup(int ac, char *av[]);
static void usage(void);
//static void noZombies(void);
static void reapZombies(void);
static void noSIGPIPE(void);
static void indiFIFO(void);
static void indiRun(void);
static void indiListen(void);
static void newFIFO(void);
static void newClient(void);
static int newClSocket(void);
static void shutdownClient(ClInfo *cp);
static int readFromClient(ClInfo *cp);
static void startDvr(DvrInfo *dp);
static void startLocalDvr(DvrInfo *dp);
static void startRemoteDvr(DvrInfo *dp);
static int openINDIServer(char host[], int indi_port);
static void shutdownDvr(DvrInfo *dp, int restart);
static int isDeviceInDriver(const char *dev, DvrInfo *dp);
static void q2RDrivers(const char *dev, Msg *mp, XMLEle *root);
static void q2SDrivers(DvrInfo *me, int isblob, const char *dev, const char *name, Msg *mp, XMLEle *root);
static int q2Clients(ClInfo *notme, int isblob, const char *dev, const char *name, Msg *mp, XMLEle *root);
static int q2Servers(DvrInfo *me, Msg *mp, XMLEle *root);
static void addSDevice(DvrInfo *dp, const char *dev, const char *name);
static Property *findSDevice(DvrInfo *dp, const char *dev, const char *name);
static void addClDevice(ClInfo *cp, const char *dev, const char *name, int isblob);
static int findClDevice(ClInfo *cp, const char *dev, const char *name);
static int readFromDriver(DvrInfo *dp);
static int stderrFromDriver(DvrInfo *dp);
static int msgQSize(FQ *q);
static void setMsgXMLEle(Msg *mp, XMLEle *root);
static void setMsgStr(Msg *mp, char *str);
static void freeMsg(Msg *mp);
static Msg *newMsg(void);
static int sendClientMsg(ClInfo *cp);
static int sendDriverMsg(DvrInfo *cp);
static void crackBLOB(const char *enableBLOB, BLOBHandling *bp);
static void crackBLOBHandling(const char *dev, const char *name, const char *enableBLOB, ClInfo *cp);
static void traceMsg(XMLEle *root);
static char *indi_tstamp(char *s);
static void logDMsg(XMLEle *root, const char *dev);
static void Bye(void);
int main(int ac, char *av[])
{
/* log startup */
logStartup(ac, av);
/* save our name */
me = av[0];
#ifdef OSX_EMBEDED_MODE
char logname[128];
snprintf(logname, 128, LOGNAME, getlogin());
fprintf(stderr, "switching stderr to %s", logname);
freopen(logname, "w", stderr);
fifo.name = FIFONAME;
verbose = 1;
ac = 0;
#else
/* crack args */
while ((--ac > 0) && ((*++av)[0] == '-'))
{
char *s;
for (s = av[0] + 1; *s != '\0'; s++)
switch (*s)
{
case 'l':
if (ac < 2)
{
fprintf(stderr, "-l requires log directory\n");
usage();
}
ldir = *++av;
ac--;
break;
case 'm':
if (ac < 2)
{
fprintf(stderr, "-m requires max MB behind\n");
usage();
}
maxqsiz = 1024 * 1024 * atoi(*++av);
ac--;
break;
case 'p':
if (ac < 2)
{
fprintf(stderr, "-p requires port value\n");
usage();
}
port = atoi(*++av);
ac--;
break;
case 'd':
if (ac < 2)
{
fprintf(stderr, "-d requires max stream MB behind\n");
usage();
}
maxstreamsiz = 1024 * 1024 * atoi(*++av);
ac--;
break;
case 'f':
if (ac < 2)
{
fprintf(stderr, "-f requires fifo node\n");
usage();
}
fifo.name = *++av;
ac--;
break;
case 'r':
if (ac < 2)
{
fprintf(stderr, "-r requires number of restarts\n");
usage();
}
maxrestarts = atoi(*++av);
if (maxrestarts < 0)
maxrestarts = 0;
ac--;
break;
case 'v':
verbose++;
break;
default:
usage();
}
}
#endif
/* at this point there are ac args in av[] to name our drivers */
if (ac == 0 && !fifo.name)
usage();
/* take care of some unixisms */
/*noZombies();*/
reapZombies();
noSIGPIPE();
/* realloc seed for client pool */
clinfo = (ClInfo *)malloc(1);
nclinfo = 0;
/* create driver info array all at once since size never changes */
ndvrinfo = ac;
dvrinfo = (DvrInfo *)calloc(ndvrinfo, sizeof(DvrInfo));
/* start each driver */
while (ac-- > 0)
{
strncpy(dvrinfo[ac].name, *av++, MAXINDINAME);
startDvr(&dvrinfo[ac]);
}
/* announce we are online */
indiListen();
/* Load up FIFO, if available */
indiFIFO();
/* handle new clients and all io */
while (1)
indiRun();
/* whoa! */
fprintf(stderr, "unexpected return from main\n");
return (1);
}
/* record we have started and our args */
static void logStartup(int ac, char *av[])
{
int i;
fprintf(stderr, "%s: startup: ", indi_tstamp(NULL));
for (i = 0; i < ac; i++)
fprintf(stderr, "%s ", av[i]);
fprintf(stderr, "\n");
}
/* print usage message and exit (2) */
static void usage(void)
{
fprintf(stderr, "Usage: %s [options] driver [driver ...]\n", me);
fprintf(stderr, "Purpose: server for local and remote INDI drivers\n");
fprintf(stderr, "INDI Library: %s\nCode %s. Protocol %g.\n", CMAKE_INDI_VERSION_STRING, GIT_TAG_STRING, INDIV);
fprintf(stderr, "Options:\n");
fprintf(stderr, " -l d : log driver messages to <d>/YYYY-MM-DD.islog\n");
fprintf(stderr, " -m m : kill client if gets more than this many MB behind, default %d\n", DEFMAXQSIZ);
fprintf(stderr,
" -d m : drop streaming blobs if client gets more than this many MB behind, default %d. 0 to disable\n",
DEFMAXSSIZ);
fprintf(stderr, " -p p : alternate IP port, default %d\n", INDIPORT);
fprintf(stderr, " -r r : maximum driver restarts on error, default %d\n", DEFMAXRESTART);
fprintf(stderr, " -f path : Path to fifo for dynamic startup and shutdown of drivers.\n");
fprintf(stderr, " -v : show key events, no traffic\n");
fprintf(stderr, " -vv : -v + key message content\n");
fprintf(stderr, " -vvv : -vv + complete xml\n");
fprintf(stderr, "driver : executable or [device]@host[:port]\n");
exit(2);
}
/* arrange for no zombies if drivers die */
//static void noZombies()
//{
// struct sigaction sa;
// sa.sa_handler = SIG_IGN;
// sigemptyset(&sa.sa_mask);
//#ifdef SA_NOCLDWAIT
// sa.sa_flags = SA_NOCLDWAIT;
//#else
// sa.sa_flags = 0;
//#endif
// (void)sigaction(SIGCHLD, &sa, NULL);
//}
/* reap zombies when drivers die, in order to leave SIGCHLD unmodified for subprocesses */
static void zombieRaised(int signum, siginfo_t *sig, void *data)
{
INDI_UNUSED(data);
switch (signum)
{
case SIGCHLD:
fprintf(stderr, "Child process %d died\n", sig->si_pid);
waitpid(sig->si_pid, NULL, WNOHANG);
break;
default:
fprintf(stderr, "Received unexpected signal %d\n", signum);
}
}
/* reap zombies as they die */
static void reapZombies()
{
struct sigaction sa;
sa.sa_sigaction = zombieRaised;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_SIGINFO;
(void)sigaction(SIGCHLD, &sa, NULL);
}
/* turn off SIGPIPE on bad write so we can handle it inline */
static void noSIGPIPE()
{
struct sigaction sa;
sa.sa_handler = SIG_IGN;
sigemptyset(&sa.sa_mask);
(void)sigaction(SIGPIPE, &sa, NULL);
}
static DvrInfo *allocDvr()
{
DvrInfo *dp = NULL;
int dvi;
/* try to reuse a driver slot, else add one */
for (dvi = 0; dvi < ndvrinfo; dvi++)
if (!(dp = &dvrinfo[dvi])->active)
break;
if (dvi == ndvrinfo)
{
/* grow dvrinfo */
dvrinfo = (DvrInfo *)realloc(dvrinfo, (ndvrinfo + 1) * sizeof(DvrInfo));
if (!dvrinfo)
{
fprintf(stderr, "no memory for new drivers\n");
Bye();
}
dp = &dvrinfo[ndvrinfo++];
}
if (dp == NULL)
return NULL;
/* rig up new dvrinfo entry */
memset(dp, 0, sizeof(*dp));
dp->active = 1;
dp->ndev = 0;
return dp;
}
/* start the given INDI driver process or connection.
* exit if trouble.
*/
static void startDvr(DvrInfo *dp)
{
if (strchr(dp->name, '@'))
startRemoteDvr(dp);
else
startLocalDvr(dp);
}
/* start the given local INDI driver process.
* exit if trouble.
*/
static void startLocalDvr(DvrInfo *dp)
{
Msg *mp;
char buf[32];
int rp[2], wp[2], ep[2];
int pid;
#ifdef OSX_EMBEDED_MODE
fprintf(stderr, "STARTING \"%s\"\n", dp->name);
fflush(stderr);
#endif
/* build three pipes: r, w and error*/
if (pipe(rp) < 0)
{
fprintf(stderr, "%s: read pipe: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
if (pipe(wp) < 0)
{
fprintf(stderr, "%s: write pipe: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
if (pipe(ep) < 0)
{
fprintf(stderr, "%s: stderr pipe: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
/* fork&exec new process */
pid = fork();
if (pid < 0)
{
fprintf(stderr, "%s: fork: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
if (pid == 0)
{
/* child: exec name */
int fd;
/* rig up pipes */
dup2(wp[0], 0); /* driver stdin reads from wp[0] */
dup2(rp[1], 1); /* driver stdout writes to rp[1] */
dup2(ep[1], 2); /* driver stderr writes to e[]1] */
for (fd = 3; fd < 100; fd++)
(void)close(fd);
if (*dp->envDev)
setenv("INDIDEV", dp->envDev, 1);
/* Only reset environment variable in case of FIFO */
else if (fifo.fd > 0)
unsetenv("INDIDEV");
if (*dp->envConfig)
setenv("INDICONFIG", dp->envConfig, 1);
else if (fifo.fd > 0)
unsetenv("INDICONFIG");
if (*dp->envSkel)
setenv("INDISKEL", dp->envSkel, 1);
else if (fifo.fd > 0)
unsetenv("INDISKEL");
char executable[MAXSBUF];
if (*dp->envPrefix)
{
setenv("INDIPREFIX", dp->envPrefix, 1);
#if defined(OSX_EMBEDED_MODE)
snprintf(executable, MAXSBUF, "%s/Contents/MacOS/%s", dp->envPrefix, dp->name);
#elif defined(__APPLE__)
snprintf(executable, MAXSBUF, "%s/%s", dp->envPrefix, dp->name);
#else
snprintf(executable, MAXSBUF, "%s/bin/%s", dp->envPrefix, dp->name);
#endif
fprintf(stderr, "%s\n", executable);
execlp(executable, dp->name, NULL);
}
else
{
if (fifo.fd > 0)
unsetenv("INDIPREFIX");
if (dp->name[0] == '.')
{
snprintf(executable, MAXSBUF, "%s/%s", dirname(me), dp->name);
execlp(executable, dp->name, NULL);
}
else
{
execlp(dp->name, dp->name, NULL);
}
}
#ifdef OSX_EMBEDED_MODE
fprintf(stderr, "FAILED \"%s\"\n", dp->name);
fflush(stderr);
#endif
fprintf(stderr, "%s: Driver %s: execlp: %s\n", indi_tstamp(NULL), dp->name, strerror(errno));
_exit(1); /* parent will notice EOF shortly */
}
/* don't need child's side of pipes */
close(wp[0]);
close(rp[1]);
close(ep[1]);
/* record pid, io channels, init lp and snoop list */
dp->pid = pid;
strncpy(dp->host, "localhost", MAXSBUF);
dp->port = -1;
dp->rfd = rp[0];
dp->wfd = wp[1];
dp->efd = ep[0];
dp->lp = newLilXML();
dp->msgq = newFQ(1);
dp->sprops = (Property *)malloc(1); /* seed for realloc */
dp->nsprops = 0;
dp->nsent = 0;
dp->active = 1;
dp->ndev = 0;
dp->dev = (char **)malloc(sizeof(char *));
/* first message primes driver to report its properties -- dev known
* if restarting
*/
mp = newMsg();
pushFQ(dp->msgq, mp);
snprintf(buf, sizeof(buf), "<getProperties version='%g'/>\n", INDIV);
setMsgStr(mp, buf);
mp->count++;
if (verbose > 0)
fprintf(stderr, "%s: Driver %s: pid=%d rfd=%d wfd=%d efd=%d\n", indi_tstamp(NULL), dp->name, dp->pid, dp->rfd,
dp->wfd, dp->efd);
}
/* start the given remote INDI driver connection.
* exit if trouble.
*/
static void startRemoteDvr(DvrInfo *dp)
{
Msg *mp;
char dev[MAXINDIDEVICE] = {0};
char host[MAXSBUF] = {0};
char buf[MAXSBUF] = {0};
int indi_port, sockfd;
/* extract host and port */
indi_port = INDIPORT;
if (sscanf(dp->name, "%[^@]@%[^:]:%d", dev, host, &indi_port) < 2)
{
// Device missing? Try a different syntax for all devices
if (sscanf(dp->name, "@%[^:]:%d", host, &indi_port) < 1)
{
fprintf(stderr, "Bad remote device syntax: %s\n", dp->name);
Bye();
}
}
/* connect */
sockfd = openINDIServer(host, indi_port);
/* record flag pid, io channels, init lp and snoop list */
dp->pid = REMOTEDVR;
strncpy(dp->host, host, MAXSBUF);
dp->port = indi_port;
dp->rfd = sockfd;
dp->wfd = sockfd;
dp->lp = newLilXML();
dp->msgq = newFQ(1);
dp->sprops = (Property *)malloc(1); /* seed for realloc */
dp->nsprops = 0;
dp->nsent = 0;
dp->active = 1;
dp->ndev = 1;
dp->dev = (char **)malloc(sizeof(char *));
/* N.B. storing name now is key to limiting outbound traffic to this
* dev.
*/
dp->dev[0] = (char *)malloc(MAXINDIDEVICE * sizeof(char));
strncpy(dp->dev[0], dev, MAXINDIDEVICE - 1);
dp->dev[0][MAXINDIDEVICE - 1] = '\0';
/* Sending getProperties with device lets remote server limit its
* outbound (and our inbound) traffic on this socket to this device.
*/
mp = newMsg();
pushFQ(dp->msgq, mp);
if (dev[0])
sprintf(buf, "<getProperties device='%s' version='%g'/>\n", dp->dev[0], INDIV);
else
// This informs downstream server that it is connecting to an upstream server
// and not a regular client. The difference is in how it treats snooping properties
// among properties.
sprintf(buf, "<getProperties device='*' version='%g'/>\n", INDIV);
setMsgStr(mp, buf);
mp->count++;
if (verbose > 0)
fprintf(stderr, "%s: Driver %s: socket=%d\n", indi_tstamp(NULL), dp->name, sockfd);
}
/* open a connection to the given host and port or die.
* return socket fd.
*/
static int openINDIServer(char host[], int indi_port)
{
struct sockaddr_in serv_addr;
struct hostent *hp;
int sockfd;
/* lookup host address */
hp = gethostbyname(host);
if (!hp)
{
fprintf(stderr, "gethostbyname(%s): %s\n", host, strerror(errno));
Bye();
}
/* create a socket to the INDI server */
(void)memset((char *)&serv_addr, 0, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
serv_addr.sin_addr.s_addr = ((struct in_addr *)(hp->h_addr_list[0]))->s_addr;
serv_addr.sin_port = htons(indi_port);
if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
fprintf(stderr, "socket(%s,%d): %s\n", host, indi_port, strerror(errno));
Bye();
}
/* connect */
if (connect(sockfd, (struct sockaddr *)&serv_addr, sizeof(serv_addr)) < 0)
{
fprintf(stderr, "connect(%s,%d): %s\n", host, indi_port, strerror(errno));
Bye();
}
/* ok */
return (sockfd);
}
/* create the public INDI Driver endpoint lsocket on port.
* return server socket else exit.
*/
static void indiListen()
{
struct sockaddr_in serv_socket;
int sfd;
int reuse = 1;
/* make socket endpoint */
if ((sfd = socket(AF_INET, SOCK_STREAM, 0)) < 0)
{
fprintf(stderr, "%s: socket: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
/* bind to given port for any IP address */
memset(&serv_socket, 0, sizeof(serv_socket));
serv_socket.sin_family = AF_INET;
#ifdef SSH_TUNNEL
serv_socket.sin_addr.s_addr = htonl(INADDR_LOOPBACK);
#else
serv_socket.sin_addr.s_addr = htonl(INADDR_ANY);
#endif
serv_socket.sin_port = htons((unsigned short)port);
if (setsockopt(sfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0)
{
fprintf(stderr, "%s: setsockopt: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
if (bind(sfd, (struct sockaddr *)&serv_socket, sizeof(serv_socket)) < 0)
{
fprintf(stderr, "%s: bind: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
/* willing to accept connections with a backlog of 5 pending */
if (listen(sfd, 5) < 0)
{
fprintf(stderr, "%s: listen: %s\n", indi_tstamp(NULL), strerror(errno));
Bye();
}
/* ok */
lsocket = sfd;
if (verbose > 0)
fprintf(stderr, "%s: listening to port %d on fd %d\n", indi_tstamp(NULL), port, sfd);
}
/* Attempt to open up FIFO */
static void indiFIFO(void)
{
close(fifo.fd);
fifo.fd = -1;
/* Open up FIFO, if available */
if (fifo.name)
{
fifo.fd = open(fifo.name, O_RDWR | O_NONBLOCK);
if (fifo.fd < 0)
{
fprintf(stderr, "%s: open(%s): %s.\n", indi_tstamp(NULL), fifo.name, strerror(errno));
Bye();
}
}
}
/* service traffic from clients and drivers */
static void indiRun(void)
{
fd_set rs, ws;
int maxfd = 0;
int i, s;
/* init with no writers or readers */
FD_ZERO(&ws);
FD_ZERO(&rs);
if (fifo.name && fifo.fd >= 0)
{
FD_SET(fifo.fd, &rs);
maxfd = fifo.fd;
}
/* always listen for new clients */
FD_SET(lsocket, &rs);
if (lsocket > maxfd)
maxfd = lsocket;
/* add all client readers and client writers with work to send */
for (i = 0; i < nclinfo; i++)
{
ClInfo *cp = &clinfo[i];
if (cp->active)
{
FD_SET(cp->s, &rs);
if (nFQ(cp->msgq) > 0)
FD_SET(cp->s, &ws);
if (cp->s > maxfd)
maxfd = cp->s;
}
}
/* add all driver readers and driver writers with work to send */
for (i = 0; i < ndvrinfo; i++)
{
DvrInfo *dp = &dvrinfo[i];
if (dp->active)
{
FD_SET(dp->rfd, &rs);
if (dp->rfd > maxfd)
maxfd = dp->rfd;
if (dp->pid != REMOTEDVR)
{
FD_SET(dp->efd, &rs);
if (dp->efd > maxfd)
maxfd = dp->efd;
}
if (nFQ(dp->msgq) > 0)
{
FD_SET(dp->wfd, &ws);
if (dp->wfd > maxfd)
maxfd = dp->wfd;
}
}
}
/* wait for action */
s = select(maxfd + 1, &rs, &ws, NULL, NULL);
if (s < 0)
{
if(errno == EINTR)
return;
fprintf(stderr, "%s: select(%d): %s\n", indi_tstamp(NULL), maxfd + 1, strerror(errno));
Bye();
}
/* new command from FIFO? */
if (s > 0 && fifo.fd >= 0 && FD_ISSET(fifo.fd, &rs))
{
newFIFO();
s--;
}
/* new client? */
if (s > 0 && FD_ISSET(lsocket, &rs))
{
newClient();
s--;
}
/* message to/from client? */
for (i = 0; s > 0 && i < nclinfo; i++)
{
ClInfo *cp = &clinfo[i];
if (cp->active)
{
if (FD_ISSET(cp->s, &rs))
{
if (readFromClient(cp) < 0)
return; /* fds effected */
s--;
}
if (s > 0 && FD_ISSET(cp->s, &ws))
{
if (sendClientMsg(cp) < 0)
return; /* fds effected */
s--;
}
}
}
/* message to/from driver? */
for (i = 0; s > 0 && i < ndvrinfo; i++)
{
DvrInfo *dp = &dvrinfo[i];
if (dp->active)
{
if (dp->pid != REMOTEDVR && FD_ISSET(dp->efd, &rs))
{
if (stderrFromDriver(dp) < 0)
return; /* fds effected */
s--;
}
if (s > 0 && FD_ISSET(dp->rfd, &rs))
{
if (readFromDriver(dp) < 0)
return; /* fds effected */
s--;
}
if (s > 0 && FD_ISSET(dp->wfd, &ws) && nFQ(dp->msgq) > 0)
{
if (sendDriverMsg(dp) < 0)
return; /* fds effected */
s--;
}
}
}
}
int isDeviceInDriver(const char *dev, DvrInfo *dp)
{
int i = 0;
for (i = 0; i < dp->ndev; i++)
{
if (!strcmp(dev, dp->dev[i]))
return 1;
}
return 0;
}
/* Read commands from FIFO and process them. Start/stop drivers accordingly */
static void newFIFO(void)
{
//char line[MAXRBUF], tDriver[MAXRBUF], tConfig[MAXRBUF], tDev[MAXRBUF], tSkel[MAXRBUF], envDev[MAXRBUF], envConfig[MAXRBUF], envSkel[MAXR];
char line[MAXRBUF];
DvrInfo *dp = NULL;
int startCmd = 0, i = 0, remoteDriver = 0;
while (i < MAXRBUF)
{
if (read(fifo.fd, line + i, 1) <= 0)
{
// Reset FIFO now, otherwise select will always return with no data from FIFO.
indiFIFO();
return;
}
if (line[i] == '\n')
{
line[i] = '\0';
i = 0;
}
else
{
i++;
continue;
}
if (verbose)
fprintf(stderr, "FIFO: %s\n", line);
char cmd[MAXSBUF], arg[4][1], var[4][MAXSBUF], tDriver[MAXSBUF], tName[MAXSBUF], envConfig[MAXSBUF],
envSkel[MAXSBUF], envPrefix[MAXSBUF];
memset(&tDriver[0], 0, sizeof(char) * MAXSBUF);
memset(&tName[0], 0, sizeof(char) * MAXSBUF);
memset(&envConfig[0], 0, sizeof(char) * MAXSBUF);
memset(&envSkel[0], 0, sizeof(char) * MAXSBUF);
memset(&envPrefix[0], 0, sizeof(char) * MAXSBUF);
int n = 0;
// If remote driver
if (strstr(line, "@"))
{
n = sscanf(line, "%s %512[^\n]", cmd, tDriver);
// Remove quotes if any
char *ptr = tDriver;
int len = strlen(tDriver);
while ((ptr = strstr(tDriver, "\"")))
{
memmove(ptr, ptr + 1, --len);
ptr[len] = '\0';
}
//fprintf(stderr, "Remote Driver: %s\n", tDriver);
remoteDriver = 1;
}
// If local driver
else
{
n = sscanf(line, "%s %s -%1c \"%512[^\"]\" -%1c \"%512[^\"]\" -%1c \"%512[^\"]\" -%1c \"%512[^\"]\"", cmd,
tDriver, arg[0], var[0], arg[1], var[1], arg[2], var[2], arg[3], var[3]);
remoteDriver = 0;
}
int n_args = (n - 2) / 2;