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#include <u.h>
#include <libc.h>
#include <bio.h>
#include "modem.h"
int
faxsend(Modem *m, int argc, char *argv[])
{
int c, count, r, flow;
char buf[128];
verbose("faxsend");
if((r = initfaxmodem(m)) != Eok)
return r;
/* telco just does the dialing */
r = response(m, 120);
switch(r){
case Rok:
break;
default:
r = seterror(m, Enoanswer);
return r;
}
xonoff(m, 1);
verbose("sending");
m->pageno = 1;
while(argc--){
if(m->pageno != 1)
sleep(1000); /* let the paper catch up */
m->valid &= ~(Vfhng|Vfet|Vfpts|Vftsi|Vfdcs);
if((r = openfaxfile(m, *argv)) != Eok)
return r;
verbose("sending geometry");
sprint(buf, "AT+FDT=%ld,%ld,%ld,%ld", m->df, m->vr, m->wd, m->ln);
if(command(m, buf) != Eok)
goto buggery;
if(response(m, 20) != Rconnect){
r = seterror(m, Eincompatible);
goto buggery;
}
/*
* Write the data, stuffing DLE's.
* After each bufferfull check if the remote
* sent us anything, e.g. CAN to abort.
* This also flushes out the ^S/^Q characters
* which the driver insists on sending us.
* (Could fix the driver, of course...).
*/
verbose("sending data");
for(;;){
flow = 0;
count = 0;
c = 0;
while(count < sizeof(buf)-1){
if((c = Bgetc(m->bp)) < 0)
break;
buf[count++] = c;
if(c == '\020')
buf[count++] = c;
}
verbose("sending %d bytes", count);
if(count && write(m->fd, buf, count) < 0){
verbose("write failed: %r");
r = seterror(m, Esys);
goto buggery;
}
/*
* this does really rough flow control since the
* avanstar is even worse
*/
verbose("flow control");
while((r = rawmchar(m, buf)) == Eok || flow){
if(r != Eok){
if(flow-- == 0)
break;
sleep(250);
continue;
}
switch(buf[0]){
case '\030':
verbose("%c", buf[0]);
if(write(m->fd, "\020\003", 2) < 0){
r = seterror(m, Esys);
goto buggery;
}
goto okexit;
case '\021':
flow = 0;
break;
case '\023':
flow = 4;
break;
case '\n':
break;
default:
verbose("%c", buf[0]);
r = seterror(m, Eproto);
goto buggery;
}
}
if(c < 0)
break;
}
/*
* End of page, send DLE+ETX,
* get OK in response.
*/
verbose("sending end of page");
if(write(m->fd, "\020\003", 2) < 0){
r = seterror(m, Esys);
goto buggery;
}
verbose("waiting for OK");
if(response(m, 120) != Rok){
r = seterror(m, Enoresponse);
goto buggery;
}
/*
* Did you hear me? - IT'S THE END OF THE PAGE.
* Argument is 0 if more pages to follow.
* Should get back an FPTS with an indication
* as to whether the page was successfully
* transmitted or not.
*/
sprint(buf, "AT+FET=%d", argc == 0? 2: 0);
if(command(m, buf) != Eok)
goto buggery;
switch(response(m, 20)){
case Rok:
break;
case Rhangup:
if(m->fhng == 0 && argc == 0)
break;
r = seterror(m, Eproto);
goto buggery;
default:
r = seterror(m, Enoresponse);
goto buggery;
}
if((m->valid & Vfpts) == 0 || m->fpts[0] != 1){
r = seterror(m, Eproto);
goto buggery;
}
Bterm(m->bp);
m->pageno++;
argv++;
}
okexit:
xonoff(m, 0);
return Eok;
buggery:
xonoff(m, 0);
Bterm(m->bp);
command(m, "AT+FK");
response(m, 5);
return r;
}
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