marignotti/mgetsockopt.c

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#include "marignotti.h"
#include <gno/kerntool.h>
#include <errno.h>
#include <sys/socket.h>
#include <sys/time.h>
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#include <intmath.h>
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#pragma noroot
#pragma optimize 79
static void ticks_to_timeval(LongWord ticks, struct timeval *tv)
{
LongDivRec qr;
if (ticks == 0)
{
tv->tv_sec = 0;
tv->tv_usec = 0;
}
else
{
qr = LongDivide(ticks, 60);
tv->tv_sec = qr.quotient;
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tv->tv_usec = qr.remainder * 16667;
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// qr.remainder * 1,000,000 / 60
}
}
int mgetsockopt(Entry *e, void *p1, void *p2, void *p3, void *p4, void *p5)
{
Word terr;
Word t;
int level = *(int *)p1;
int optname = *(int *)p2;
void *optval = (void *)p3;
int optlen = p4 ? *(int *)p4 : 0;
if (level != SOL_SOCKET) return EINVAL;
if (!optval) return EINVAL;
// todo -- linger
switch (optname)
{
case SO_TYPE:
// todo... non-stream
if (optlen == 4)
{
*(LongWord *)optval = SOCK_STREAM;
return 0;
}
if (optlen == 2)
{
*(Word *)optval = SOCK_STREAM;
return 0;
}
break;
case SO_OOBINLINE:
if (optlen == 4)
{
*(LongWord *)optval = 1;
return 0;
}
if (optlen == 2)
{
*(Word *)optval = 1;
return 0;
}
if (optlen == 1)
{
*(char *)optval = 1;
return 0;
}
break;
case SO_SNDLOWAT:
if (optlen == 4)
{
*(LongWord *)optval = e->_SNDLOWAT;
return 0;
}
if (optlen == 2)
{
*(Word *)optval = e->_SNDLOWAT;
return 0;
}
break;
case SO_RCVLOWAT:
if (optlen == 4)
{
*(LongWord *)optval = e->_RCVLOWAT;
return 0;
}
if (optlen == 2)
{
*(Word *)optval = e->_RCVLOWAT;
return 0;
}
break;
case SO_SNDTIMEO:
if (optlen == sizeof(struct timeval))
{
// stored as ticks aka seconds * 60.
struct timeval *tv = (struct timeval *)optval;
ticks_to_timeval(e->_SNDTIMEO, tv);
return 0;
}
break;
case SO_RCVTIMEO:
if (optlen == sizeof(struct timeval))
{
// stored as ticks aka seconds * 60.
struct timeval *tv = (struct timeval *)optval;
ticks_to_timeval(e->_RCVTIMEO, tv);
return 0;
}
break;
#ifdef SO_NREAD
case SO_NREAD:
IncBusy();
terr = TCPIPStatusTCP(e->ipid, &e->sr);
t = _toolErr;
DecBusy();
if (t) terr = t;
if (optlen == 4)
{
*(LongWord *)optval = e->sr.srRcvQueued;
return 0;
}
if (optlen == 2)
{
*(Word *)optval = e->sr.srRcvQueued;
return 0;
}
break;
#endif
#ifdef SO_NWRITE
case SO_NWRITE:
IncBusy();
terr = TCPIPStatusTCP(e->ipid, &e->sr);
t = _toolErr;
DecBusy();
if (t) terr = t;
if (optlen == 4)
{
*(LongWord *)optval = e->sr.srSndQueued;
return 0;
}
if (optlen == 2)
{
*(Word *)optval = e->sr.srSndQueued;
return 0;
}
return EINVAL;
break;
#endif
}
return EINVAL;
}