minix/servers/inet/qp.c

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/*
inet/qp.c
Query parameters
Created: June 1995 by Philip Homburg <philip@f-mnx.phicoh.com>
*/
#include "inet.h"
#include <sys/svrctl.h>
#ifdef __minix_vmd
#include <minix/queryparam.h>
#else /* Minix 3 */
#include <minix3/queryparam.h>
#endif
#include "generic/buf.h"
#include "generic/clock.h"
#include "generic/event.h"
#include "generic/type.h"
#include "generic/sr.h"
#include "generic/tcp_int.h"
#include "generic/udp_int.h"
#include "mq.h"
#include "qp.h"
#include "sr_int.h"
FORWARD int get_userdata ARGS(( int proc, vir_bytes vaddr, vir_bytes vlen,
void *buffer ));
FORWARD int put_userdata ARGS(( int proc, vir_bytes vaddr, vir_bytes vlen,
void *buffer ));
FORWARD int iqp_getc ARGS(( void ));
FORWARD void iqp_putc ARGS(( int c ));
PRIVATE struct export_param_list inet_ex_list[]=
{
QP_VARIABLE(sr_fd_table),
QP_VARIABLE(ip_dev),
QP_VARIABLE(tcp_fd_table),
QP_VARIABLE(tcp_conn_table),
QP_VARIABLE(tcp_cancel_f),
QP_VECTOR(udp_port_table, udp_port_table, ip_conf_nr),
QP_VARIABLE(udp_fd_table),
QP_END()
};
PRIVATE struct export_params inet_ex_params= { inet_ex_list, NULL };
PRIVATE struct queryvars {
int proc;
struct svrqueryparam qpar;
char parbuf[256], valbuf[256];
char *param, *value;
int r;
} *qvars;
PUBLIC void qp_init()
{
qp_export(&inet_ex_params);
}
PUBLIC int qp_query(proc, argp)
int proc;
vir_bytes argp;
{
/* Return values, sizes, or addresses of variables in MM space. */
struct queryvars qv;
void *addr;
size_t n, size;
int byte;
int more;
static char hex[]= "0123456789ABCDEF";
qv.r= get_userdata(proc, argp, sizeof(qv.qpar), &qv.qpar);
/* Export these to mq_getc() and mq_putc(). */
qvars= &qv;
qv.proc= proc;
qv.param= qv.parbuf + sizeof(qv.parbuf);
qv.value= qv.valbuf;
do {
more= queryparam(iqp_getc, &addr, &size);
for (n= 0; n < size; n++) {
byte= ((u8_t *) addr)[n];
iqp_putc(hex[byte >> 4]);
iqp_putc(hex[byte & 0x0F]);
}
iqp_putc(more ? ',' : 0);
} while (more);
return qv.r;
}
PRIVATE int iqp_getc()
{
/* Return one character of the names to search for. */
struct queryvars *qv= qvars;
size_t n;
if (qv->r != OK || qv->qpar.psize == 0) return 0;
if (qv->param == qv->parbuf + sizeof(qv->parbuf)) {
/* Need to fill the parameter buffer. */
n= sizeof(qv->parbuf);
if (qv->qpar.psize < n) n= qv->qpar.psize;
qv->r= get_userdata(qv->proc, (vir_bytes) qv->qpar.param, n,
qv->parbuf);
if (qv->r != OK) return 0;
qv->qpar.param+= n;
qv->param= qv->parbuf;
}
qv->qpar.psize--;
return (u8_t) *qv->param++;
}
PRIVATE void iqp_putc(c)
int c;
{
/* Send one character back to the user. */
struct queryvars *qv= qvars;
size_t n;
if (qv->r != OK || qv->qpar.vsize == 0) return;
*qv->value++= c;
qv->qpar.vsize--;
if (qv->value == qv->valbuf + sizeof(qv->valbuf)
|| c == 0 || qv->qpar.vsize == 0) {
/* Copy the value buffer to user space. */
n= qv->value - qv->valbuf;
qv->r= put_userdata(qv->proc, (vir_bytes) qv->qpar.value, n,
qv->valbuf);
qv->qpar.value+= n;
qv->value= qv->valbuf;
}
}
PRIVATE int get_userdata(proc, vaddr, vlen, buffer)
int proc;
vir_bytes vaddr;
vir_bytes vlen;
void *buffer;
{
#ifdef __minix_vmd
return sys_copy(proc, SEG_D, (phys_bytes)vaddr, this_proc, SEG_D,
(phys_bytes)buffer, (phys_bytes)vlen);
#else /* Minix 3 */
return sys_vircopy(proc, D, vaddr, SELF, D, (vir_bytes)buffer, vlen);
#endif
}
PRIVATE int put_userdata(proc, vaddr, vlen, buffer)
int proc;
vir_bytes vaddr;
vir_bytes vlen;
void *buffer;
{
#ifdef __minix_vmd
return sys_copy(this_proc, SEG_D, (phys_bytes)buffer,
proc, SEG_D, (phys_bytes)vaddr, (phys_bytes)vlen);
#else /* Minix 3 */
return sys_vircopy(SELF, D, (vir_bytes)buffer, proc, D, vaddr, vlen);
#endif
}
/*
* $PchId: qp.c,v 1.7 2005/06/28 14:25:25 philip Exp $
*/