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indidriver.c
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indidriver.c
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#if 0
INDI Driver Functions
Copyright (C) 2020 by Pawel Soja <[email protected]>
Copyright (C) 2003 - 2020 Jasem Mutlaq
Copyright (C) 2003 - 2006 Elwood C. Downey
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
#endif
#include "indidriver.h"
#include "base64.h"
#include "eventloop.h"
#include "indicom.h"
#include "indidevapi.h"
#include "locale_compat.h"
#include <errno.h>
#include <pthread.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <assert.h>
pthread_mutex_t stdout_mutex = PTHREAD_MUTEX_INITIALIZER;
#define MAXRBUF 2048
/*! INDI property type */
enum
{
INDI_NUMBER,
INDI_SWITCH,
INDI_TEXT,
INDI_LIGHT,
INDI_BLOB,
INDI_UNKNOWN
};
/* Return index of property property if already cached, -1 otherwise */
int isPropDefined(const char *property_name, const char *device_name)
{
int i = 0;
for (i = 0; i < nPropCache; i++)
if (!strcmp(property_name, propCache[i].propName) && !strcmp(device_name, propCache[i].devName))
return i;
return -1;
}
/* output a string expanding special characters into xml/html escape sequences */
static void escapeXML_fputs(const char *src, FILE *stream)
{
const char *ptr = src;
const char *replacement;
for(; *ptr; ++ptr)
{
switch(*ptr)
{
case '&': replacement = "&"; break;
case '\'': replacement = "'"; break;
case '"': replacement = """; break;
case '<': replacement = "<"; break;
case '>': replacement = ">"; break;
default: replacement = NULL;
}
if (replacement != NULL)
{
fwrite(src, 1, (size_t)(ptr - src), stream);
src = ptr + 1;
fputs(replacement, stream);
}
}
fwrite(src, 1, (size_t)(ptr - src), stream);
}
/* output a string expanding special characters into xml/html escape sequences */
static size_t escapeXML2(char *dst, const char *src, size_t size)
{
char *ptr = dst; // copy pointer
// size > 1 - place for null-terminator
for(; size > 1 && *src; ++src)
{
switch (*src)
{
case '&':
if (size < 6) goto finish;
strncpy(ptr, "&", 6);
ptr += 5;
size -= 5;
break;
case '\'':
if (size < 7) goto finish;
strncpy(ptr, "'", 7);
ptr += 6;
size -= 6;
break;
case '"':
if (size < 7) goto finish;
strncpy(ptr, """, 7);
ptr += 6;
size -= 6;
break;
case '<':
if (size < 5) goto finish;
strncpy(ptr, "<", 5);
ptr += 4;
size -= 4;
break;
case '>':
if (size < 5) goto finish;
strncpy(ptr, ">", 5);
ptr += 4;
size -= 4;
break;
default:
*ptr++ = *src;
size -= 1;
break;
}
}
finish:
if (size > 0)
*ptr = 0;
return (size_t)(ptr - dst);
}
// unused
#if 0
/* output a string expanding special characters into xml/html escape sequences */
/* N.B. You must free the returned buffer after use! */
static char *escapeXML(const char *src, size_t size)
{
char *dst = malloc(sizeof(char) * size);
assert_mem(dst);
escapeXML2(dst, src, size);
return dst;
}
#endif
/* tell Client to delete the property with given name on given device, or
* entire device if !name
*/
void IDDelete(const char *dev, const char *name, const char *fmt, ...)
{
pthread_mutex_lock(&stdout_mutex);
xmlv1();
printf("<delProperty\n device='%s'\n", dev);
if (name)
printf(" name='%s'\n", name);
printf(" timestamp='%s'\n", timestamp());
if (fmt)
{
va_list ap;
va_start(ap, fmt);
char message[MAXINDIMESSAGE];
printf(" message='");
vsnprintf(message, MAXINDIMESSAGE, fmt, ap);
printf("%s'\n", entityXML(message));
va_end(ap);
}
printf("/>\n");
fflush(stdout);
pthread_mutex_unlock(&stdout_mutex);
}
/* tell indiserver we want to snoop on the given device/property.
* name ignored if NULL or empty.
*/
void IDSnoopDevice(const char *snooped_device, const char *snooped_property)
{
pthread_mutex_lock(&stdout_mutex);
xmlv1();
if (snooped_property && snooped_property[0])
printf("<getProperties version='%g' device='%s' name='%s'/>\n", INDIV, snooped_device, snooped_property);
else
printf("<getProperties version='%g' device='%s'/>\n", INDIV, snooped_device);
fflush(stdout);
pthread_mutex_unlock(&stdout_mutex);
}
/* tell indiserver whether we want BLOBs from the given snooped device.
* silently ignored if given device is not already registered for snooping.
*/
void IDSnoopBLOBs(const char *snooped_device, const char *snooped_property, BLOBHandling bh)
{
const char *how;
switch (bh)
{
case B_NEVER:
how = "Never";
break;
case B_ALSO:
how = "Also";
break;
case B_ONLY:
how = "Only";
break;
default:
return;
}
pthread_mutex_lock(&stdout_mutex);
xmlv1();
if (snooped_property && snooped_property[0])
printf("<enableBLOB device='%s' name='%s'>%s</enableBLOB>\n", snooped_device, snooped_property, how);
else
printf("<enableBLOB device='%s'>%s</enableBLOB>\n", snooped_device, how);
fflush(stdout);
pthread_mutex_unlock(&stdout_mutex);
}
/* "INDI" wrappers to the more generic eventloop facility. */
int IEAddCallback(int readfiledes, IE_CBF *fp, void *p)
{
return (addCallback(readfiledes, (CBF *)fp, p));
}
void IERmCallback(int callbackid)
{
rmCallback(callbackid);
}
int IEAddTimer(int millisecs, IE_TCF *fp, void *p)
{
return (addTimer(millisecs, (TCF *)fp, p));
}
void IERmTimer(int timerid)
{
rmTimer(timerid);
}
int IEAddWorkProc(IE_WPF *fp, void *p)
{
return (addWorkProc((WPF *)fp, p));
}
void IERmWorkProc(int workprocid)
{
rmWorkProc(workprocid);
}
int IEDeferLoop(int maxms, int *flagp)
{
return (deferLoop(maxms, flagp));
}
int IEDeferLoop0(int maxms, int *flagp)
{
return (deferLoop0(maxms, flagp));
}
/* Update property switches in accord with states and names. */
int IUUpdateSwitch(ISwitchVectorProperty *svp, ISState *states, char *names[], int n)
{
int i = 0;
ISwitch *sp;
char sn[MAXINDINAME];
assert(svp != NULL && "IUUpdateSwitch SVP is NULL");
/* store On switch name */
if (svp->r == ISR_1OFMANY)
{
sp = IUFindOnSwitch(svp);
if (sp)
strncpy(sn, sp->name, MAXINDINAME);
IUResetSwitch(svp);
}
for (i = 0; i < n; i++)
{
sp = IUFindSwitch(svp, names[i]);
if (!sp)
{
svp->s = IPS_IDLE;
IDSetSwitch(svp, "Error: %s is not a member of %s (%s) property.", names[i], svp->label, svp->name);
return -1;
}
sp->s = states[i];
}
/* Consistency checks for ISR_1OFMANY after update. */
if (svp->r == ISR_1OFMANY)
{
int t_count = 0;
for (i = 0; i < svp->nsp; i++)
{
if (svp->sp[i].s == ISS_ON)
t_count++;
}
if (t_count != 1)
{
IUResetSwitch(svp);
sp = IUFindSwitch(svp, sn);
if (sp)
sp->s = ISS_ON;
svp->s = IPS_IDLE;
IDSetSwitch(svp, "Error: invalid state switch for property %s (%s). %s.", svp->label, svp->name,
t_count == 0 ? "No switch is on" : "Too many switches are on");
return -1;
}
}
return 0;
}
/* Update property numbers in accord with values and names */
int IUUpdateNumber(INumberVectorProperty *nvp, double values[], char *names[], int n)
{
int i = 0;
INumber *np;
assert(nvp != NULL && "IUUpdateNumber NVP is NULL");
for (i = 0; i < n; i++)
{
np = IUFindNumber(nvp, names[i]);
if (!np)
{
nvp->s = IPS_IDLE;
IDSetNumber(nvp, "Error: %s is not a member of %s (%s) property.", names[i], nvp->label, nvp->name);
return -1;
}
if (values[i] < np->min || values[i] > np->max)
{
nvp->s = IPS_ALERT;
IDSetNumber(nvp, "Error: Invalid range for %s (%s). Valid range is from %g to %g. Requested value is %g",
np->label, np->name, np->min, np->max, values[i]);
return -1;
}
}
/* First loop checks for error, second loop set all values atomically*/
for (i = 0; i < n; i++)
{
np = IUFindNumber(nvp, names[i]);
np->value = values[i];
}
return 0;
}
/* Update property text in accord with texts and names */
int IUUpdateText(ITextVectorProperty *tvp, char *texts[], char *names[], int n)
{
int i = 0;
IText *tp;
assert(tvp != NULL && "IUUpdateText TVP is NULL");
for (i = 0; i < n; i++)
{
tp = IUFindText(tvp, names[i]);
if (!tp)
{
tvp->s = IPS_IDLE;
IDSetText(tvp, "Error: %s is not a member of %s (%s) property.", names[i], tvp->label, tvp->name);
return -1;
}
}
/* First loop checks for error, second loop set all values atomically*/
for (i = 0; i < n; i++)
{
tp = IUFindText(tvp, names[i]);
IUSaveText(tp, texts[i]);
}
return 0;
}
/* Update property BLOB in accord with BLOBs and names */
int IUUpdateBLOB(IBLOBVectorProperty *bvp, int sizes[], int blobsizes[], char *blobs[], char *formats[], char *names[],
int n)
{
int i = 0;
IBLOB *bp;
assert(bvp != NULL && "IUUpdateBLOB BVP is NULL");
for (i = 0; i < n; i++)
{
bp = IUFindBLOB(bvp, names[i]);
if (!bp)
{
bvp->s = IPS_IDLE;
IDSetBLOB(bvp, "Error: %s is not a member of %s (%s) property.", names[i], bvp->label, bvp->name);
return -1;
}
}
/* First loop checks for error, second loop set all values atomically*/
for (i = 0; i < n; i++)
{
bp = IUFindBLOB(bvp, names[i]);
IUSaveBLOB(bp, sizes[i], blobsizes[i], blobs[i], formats[i]);
}
return 0;
}
int IUSaveBLOB(IBLOB *bp, int size, int blobsize, char *blob, char *format)
{
bp->bloblen = blobsize;
bp->size = size;
bp->blob = blob;
strncpy(bp->format, format, MAXINDIFORMAT);
return 0;
}
void IUFillSwitch(ISwitch *sp, const char *name, const char *label, ISState s)
{
escapeXML2(sp->name, name, sizeof(sp->name));
if (label[0])
escapeXML2(sp->label, label, sizeof(sp->label));
else
strncpy(sp->label, sp->name, sizeof(sp->label));
sp->s = s;
sp->svp = NULL;
sp->aux = NULL;
}
void IUFillLight(ILight *lp, const char *name, const char *label, IPState s)
{
escapeXML2(lp->name, name, sizeof(lp->name));
if (label[0])
escapeXML2(lp->label, label, sizeof(lp->label));
else
strncpy(lp->label, lp->name, sizeof(lp->label));
lp->s = s;
lp->lvp = NULL;
lp->aux = NULL;
}
void IUFillNumber(INumber *np, const char *name, const char *label, const char *format, double min, double max,
double step, double value)
{
escapeXML2(np->name, name, sizeof(np->name));
if (label[0])
escapeXML2(np->label, label, sizeof(np->label));
else
strncpy(np->label, np->name, sizeof(np->label));
strncpy(np->format, format, sizeof(np->format)); // escape unnecessary?
np->min = min;
np->max = max;
np->step = step;
np->value = value;
np->nvp = NULL;
np->aux0 = NULL;
np->aux1 = NULL;
}
void IUFillText(IText *tp, const char *name, const char *label, const char *initialText)
{
escapeXML2(tp->name, name, sizeof(tp->name));
if (label[0])
escapeXML2(tp->label, label, sizeof(tp->label));
else
strncpy(tp->label, tp->name, sizeof(tp->label));
if (tp->text && tp->text[0])
free(tp->text);
tp->text = NULL;
tp->tvp = NULL;
tp->aux0 = NULL;
tp->aux1 = NULL;
if (initialText && initialText[0])
IUSaveText(tp, initialText);
}
void IUFillBLOB(IBLOB *bp, const char *name, const char *label, const char *format)
{
memset(bp, 0, sizeof(IBLOB));
escapeXML2(bp->name, name, sizeof(bp->name));
if (label[0])
escapeXML2(bp->label, label, sizeof(bp->label));
else
strncpy(bp->label, bp->name, sizeof(bp->label));
strncpy(bp->format, format, sizeof(bp->format)); // escape unnecessary?
bp->blob = 0;
bp->bloblen = 0;
bp->size = 0;
bp->bvp = 0;
bp->aux0 = 0;
bp->aux1 = 0;
bp->aux2 = 0;
}
void IUFillSwitchVector(ISwitchVectorProperty *svp, ISwitch *sp, int nsp, const char *dev, const char *name,
const char *label, const char *group, IPerm p, ISRule r, double timeout, IPState s)
{
strncpy(svp->device, dev, sizeof(svp->device)); // escape unnecessary?
escapeXML2(svp->name, name, sizeof(svp->name));
if (label[0])
escapeXML2(svp->label, label, sizeof(svp->label));
else
strncpy(svp->label, svp->name, sizeof(svp->label));
strncpy(svp->group, group, sizeof(svp->group)); // escape unnecessary?
svp->timestamp[0] = '\0';
svp->p = p;
svp->r = r;
svp->timeout = timeout;
svp->s = s;
svp->sp = sp;
svp->nsp = nsp;
}
void IUFillLightVector(ILightVectorProperty *lvp, ILight *lp, int nlp, const char *dev, const char *name,
const char *label, const char *group, IPState s)
{
strncpy(lvp->device, dev, sizeof(lvp->device)); // escape unnecessary?
escapeXML2(lvp->name, name, sizeof(lvp->name));
if (label[0])
escapeXML2(lvp->label, label, sizeof(lvp->label));
else
strncpy(lvp->label, lvp->name, sizeof(lvp->label));
strncpy(lvp->group, group, sizeof(lvp->group)); // escape unnecessary?
lvp->timestamp[0] = '\0';
lvp->s = s;
lvp->lp = lp;
lvp->nlp = nlp;
}
void IUFillNumberVector(INumberVectorProperty *nvp, INumber *np, int nnp, const char *dev, const char *name,
const char *label, const char *group, IPerm p, double timeout, IPState s)
{
strncpy(nvp->device, dev, sizeof(nvp->device)); // escape unnecessary?
escapeXML2(nvp->name, name, sizeof(nvp->name));
if (label[0])
escapeXML2(nvp->label, label, sizeof(nvp->label));
else
strncpy(nvp->label, nvp->name, sizeof(nvp->label));
strncpy(nvp->group, group, sizeof(nvp->group)); // escape unnecessary?
nvp->timestamp[0] = '\0';
nvp->p = p;
nvp->timeout = timeout;
nvp->s = s;
nvp->np = np;
nvp->nnp = nnp;
}
void IUFillTextVector(ITextVectorProperty *tvp, IText *tp, int ntp, const char *dev, const char *name,
const char *label, const char *group, IPerm p, double timeout, IPState s)
{
strncpy(tvp->device, dev, sizeof(tvp->device)); // escape unnecessary?
escapeXML2(tvp->name, name, sizeof(tvp->name));
if (label[0])
escapeXML2(tvp->label, label, sizeof(tvp->label));
else
strncpy(tvp->label, tvp->name, sizeof(tvp->label));
strncpy(tvp->group, group, sizeof(tvp->group)); // escape unnecessary?
tvp->timestamp[0] = '\0';
tvp->p = p;
tvp->timeout = timeout;
tvp->s = s;
tvp->tp = tp;
tvp->ntp = ntp;
}
void IUFillBLOBVector(IBLOBVectorProperty *bvp, IBLOB *bp, int nbp, const char *dev, const char *name,
const char *label, const char *group, IPerm p, double timeout, IPState s)
{
memset(bvp, 0, sizeof(IBLOBVectorProperty));
strncpy(bvp->device, dev, sizeof(bvp->device)); // escape unnecessary?
escapeXML2(bvp->name, name, sizeof(bvp->name));
if (label[0])
escapeXML2(bvp->label, label, sizeof(bvp->label));
else
strncpy(bvp->label, bvp->name, sizeof(bvp->label));
strncpy(bvp->group, group, sizeof(bvp->group)); // escape unnecessary?
bvp->timestamp[0] = '\0';
bvp->p = p;
bvp->timeout = timeout;
bvp->s = s;
bvp->bp = bp;
bvp->nbp = nbp;
}
/*****************************************************************************
* convenience functions for use in your implementation of ISSnoopDevice().
*/
/* crack the snooped driver setNumberVector or defNumberVector message into
* the given INumberVectorProperty.
* return 0 if type, device and name match and all members are present, else
* return -1
*/
int IUSnoopNumber(XMLEle *root, INumberVectorProperty *nvp)
{
char *dev, *name;
XMLEle *ep;
int i;
/* check and crack type, device, name and state */
if (strcmp(tagXMLEle(root) + 3, "NumberVector") || crackDN(root, &dev, &name, NULL) < 0)
return (-1);
if (strcmp(dev, nvp->device) || strcmp(name, nvp->name))
return (-1); /* not this property */
(void)crackIPState(findXMLAttValu(root, "state"), &nvp->s);
/* match each INumber with a oneNumber */
locale_char_t *orig = indi_locale_C_numeric_push();
for (i = 0; i < nvp->nnp; i++)
{
for (ep = nextXMLEle(root, 1); ep; ep = nextXMLEle(root, 0))
{
if (!strcmp(tagXMLEle(ep) + 3, "Number") && !strcmp(nvp->np[i].name, findXMLAttValu(ep, "name")))
{
if (f_scansexa(pcdataXMLEle(ep), &nvp->np[i].value) < 0)
{
indi_locale_C_numeric_pop(orig);
return (-1); /* bad number format */
}
break;
}
}
if (!ep)
{
indi_locale_C_numeric_pop(orig);
return (-1); /* element not found */
}
}
indi_locale_C_numeric_pop(orig);
/* ok */
return (0);
}
/* crack the snooped driver setTextVector or defTextVector message into
* the given ITextVectorProperty.
* return 0 if type, device and name match and all members are present, else
* return -1
*/
int IUSnoopText(XMLEle *root, ITextVectorProperty *tvp)
{
char *dev, *name;
XMLEle *ep;
int i;
/* check and crack type, device, name and state */
if (strcmp(tagXMLEle(root) + 3, "TextVector") || crackDN(root, &dev, &name, NULL) < 0)
return (-1);
if (strcmp(dev, tvp->device) || strcmp(name, tvp->name))
return (-1); /* not this property */
(void)crackIPState(findXMLAttValu(root, "state"), &tvp->s);
/* match each IText with a oneText */
for (i = 0; i < tvp->ntp; i++)
{
for (ep = nextXMLEle(root, 1); ep; ep = nextXMLEle(root, 0))
{
if (!strcmp(tagXMLEle(ep) + 3, "Text") && !strcmp(tvp->tp[i].name, findXMLAttValu(ep, "name")))
{
IUSaveText(&tvp->tp[i], pcdataXMLEle(ep));
break;
}
}
if (!ep)
return (-1); /* element not found */
}
/* ok */
return (0);
}
/* crack the snooped driver setLightVector or defLightVector message into
* the given ILightVectorProperty. it is not necessary that all ILight names
* be found.
* return 0 if type, device and name match, else return -1.
*/
int IUSnoopLight(XMLEle *root, ILightVectorProperty *lvp)
{
char *dev, *name;
XMLEle *ep;
int i;
/* check and crack type, device, name and state */
if (strcmp(tagXMLEle(root) + 3, "LightVector") || crackDN(root, &dev, &name, NULL) < 0)
return (-1);
if (strcmp(dev, lvp->device) || strcmp(name, lvp->name))
return (-1); /* not this property */
(void)crackIPState(findXMLAttValu(root, "state"), &lvp->s);
/* match each oneLight with one ILight */
for (ep = nextXMLEle(root, 1); ep; ep = nextXMLEle(root, 0))
{
if (!strcmp(tagXMLEle(ep) + 3, "Light"))
{
const char *name = findXMLAttValu(ep, "name");
for (i = 0; i < lvp->nlp; i++)
{
if (!strcmp(lvp->lp[i].name, name))
{
if (crackIPState(pcdataXMLEle(ep), &lvp->lp[i].s) < 0)
{
return (-1); /* unrecognized state */
}
break;
}
}
}
}
/* ok */
return (0);
}
/* crack the snooped driver setSwitchVector or defSwitchVector message into the
* given ISwitchVectorProperty. it is not necessary that all ISwitch names be
* found.
* return 0 if type, device and name match, else return -1.
*/
int IUSnoopSwitch(XMLEle *root, ISwitchVectorProperty *svp)
{
char *dev, *name;
XMLEle *ep;
int i;
/* check and crack type, device, name and state */
if (strcmp(tagXMLEle(root) + 3, "SwitchVector") || crackDN(root, &dev, &name, NULL) < 0)
return (-1);
if (strcmp(dev, svp->device) || strcmp(name, svp->name))
return (-1); /* not this property */
(void)crackIPState(findXMLAttValu(root, "state"), &svp->s);
/* match each oneSwitch with one ISwitch */
for (ep = nextXMLEle(root, 1); ep; ep = nextXMLEle(root, 0))
{
if (!strcmp(tagXMLEle(ep) + 3, "Switch"))
{
const char *name = findXMLAttValu(ep, "name");
for (i = 0; i < svp->nsp; i++)
{
if (!strcmp(svp->sp[i].name, name))
{
if (crackISState(pcdataXMLEle(ep), &svp->sp[i].s) < 0)
{
return (-1); /* unrecognized state */
}
break;
}
}
}
}
/* ok */
return (0);
}
/* crack the snooped driver setBLOBVector message into the given
* IBLOBVectorProperty. it is not necessary that all IBLOB names be found.
* return 0 if type, device and name match, else return -1.
* N.B. we assume any existing blob in bvp has been malloced, which we free
* and replace with a newly malloced blob if found.
*/
int IUSnoopBLOB(XMLEle *root, IBLOBVectorProperty *bvp)
{
char *dev, *name;
XMLEle *ep;
/* check and crack type, device, name and state */
if (strcmp(tagXMLEle(root), "setBLOBVector") || crackDN(root, &dev, &name, NULL) < 0)
return (-1);
if (strcmp(dev, bvp->device) || strcmp(name, bvp->name))
return (-1); /* not this property */
crackIPState(findXMLAttValu(root, "state"), &bvp->s);
for (ep = nextXMLEle(root, 1); ep; ep = nextXMLEle(root, 0))
{
if (strcmp(tagXMLEle(ep), "oneBLOB") == 0)
{
XMLAtt *na = findXMLAtt(ep, "name");
if (na == NULL)
return (-1);
IBLOB *bp = IUFindBLOB(bvp, valuXMLAtt(na));
if (bp == NULL)
return (-1);
XMLAtt *fa = findXMLAtt(ep, "format");
XMLAtt *sa = findXMLAtt(ep, "size");
XMLAtt *ec = findXMLAtt(ep, "enclen");
if (fa && sa && ec)
{
int enclen = atoi(valuXMLAtt(ec));
assert_mem(bp->blob = realloc(bp->blob, 3 * enclen / 4));
bp->bloblen = from64tobits_fast(bp->blob, pcdataXMLEle(ep), enclen);
strncpy(bp->format, valuXMLAtt(fa), MAXINDIFORMAT);
bp->size = atoi(valuXMLAtt(sa));
}
}
}
/* ok */
return (0);
}
/* callback when INDI client message arrives on stdin.
* collect and dispatch when see outter element closure.
* exit if OS trouble or see incompatable INDI version.
* arg is not used.
*/
void clientMsgCB(int fd, void *arg)
{
(void)arg;
char buf[MAXRBUF], msg[MAXRBUF], *bp;
int nr;
/* one read */
nr = read(fd, buf, sizeof(buf));
if (nr < 0)
{
fprintf(stderr, "%s: %s\n", me, strerror(errno));
exit(1);
}
if (nr == 0)
{
fprintf(stderr, "%s: EOF\n", me);
exit(1);
}
/* crack and dispatch when complete */
for (bp = buf; nr-- > 0; bp++)
{
XMLEle *root = readXMLEle(clixml, *bp, msg);
if (root)
{
if (dispatch(root, msg) < 0)
fprintf(stderr, "%s dispatch error: %s\n", me, msg);
delXMLEle(root);
}
else if (msg[0])
fprintf(stderr, "%s XML error: %s\n", me, msg);
}
}
/* crack the given INDI XML element and call driver's IS* entry points as they
* are recognized.
* return 0 if ok else -1 with reason in msg[].
* N.B. exit if getProperties does not proclaim a compatible version.
*/
int dispatch(XMLEle *root, char msg[])
{
char *rtag = tagXMLEle(root);
XMLEle *ep;
int n, i = 0;
if (verbose)
prXMLEle(stderr, root, 0);
if (!strcmp(rtag, "getProperties"))
{
XMLAtt *ap, *name, *dev;
double v;
/* check version */
ap = findXMLAtt(root, "version");
if (!ap)
{
fprintf(stderr, "%s: getProperties missing version\n", me);
exit(1);
}
v = atof(valuXMLAtt(ap));
if (v > INDIV)
{
fprintf(stderr, "%s: client version %g > %g\n", me, v, INDIV);
exit(1);
}
// Get device
dev = findXMLAtt(root, "device");
// Get property name
name = findXMLAtt(root, "name");
if (name && dev)
{
int index = isPropDefined(valuXMLAtt(name), valuXMLAtt(dev));
if (index < 0)
return 0;
ROSC *prop = propCache + index;
switch (prop->type)
{
/* JM 2019-07-18: Why are we using setXXX here? should be defXXX */
case INDI_NUMBER:
//IDSetNumber((INumberVectorProperty *)(prop->ptr), NULL);
IDDefNumber((INumberVectorProperty *)(prop->ptr), NULL);
return 0;
case INDI_SWITCH:
//IDSetSwitch((ISwitchVectorProperty *)(prop->ptr), NULL);
IDDefSwitch((ISwitchVectorProperty *)(prop->ptr), NULL);
return 0;
case INDI_TEXT:
//IDSetText((ITextVectorProperty *)(prop->ptr), NULL);
IDDefText((ITextVectorProperty *)(prop->ptr), NULL);
return 0;
case INDI_BLOB:
//IDSetBLOB((IBLOBVectorProperty *)(prop->ptr), NULL);
IDDefBLOB((IBLOBVectorProperty *)(prop->ptr), NULL);
return 0;
default:
return 0;
}
}
ISGetProperties(dev ? valuXMLAtt(dev) : NULL);
return (0);
}
/* other commands might be from a snooped device.
* we don't know here which devices are being snooped so we send
* all remaining valid messages
*/
if (!strcmp(rtag, "setNumberVector") || !strcmp(rtag, "setTextVector") || !strcmp(rtag, "setLightVector") ||
!strcmp(rtag, "setSwitchVector") || !strcmp(rtag, "setBLOBVector") || !strcmp(rtag, "defNumberVector") ||
!strcmp(rtag, "defTextVector") || !strcmp(rtag, "defLightVector") || !strcmp(rtag, "defSwitchVector") ||
!strcmp(rtag, "defBLOBVector") || !strcmp(rtag, "message") || !strcmp(rtag, "delProperty"))
{
ISSnoopDevice(root);
return (0);
}