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add a handler for the reserved port sysctl variable.

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This commit is contained in:
christos 2012-11-29 02:06:17 +00:00
parent de1cb60c9b
commit 97613513e6
1 changed files with 99 additions and 3 deletions
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102
sbin/sysctl/sysctl.c
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@ -1,4 +1,4 @@
/* $NetBSD: sysctl.c,v 1.143 2012/06/02 21:38:09 dsl Exp $ */
/* $NetBSD: sysctl.c,v 1.144 2012/11/29 02:06:17 christos Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
@ -68,10 +68,12 @@ __COPYRIGHT("@(#) Copyright (c) 1993\
#if 0
static char sccsid[] = "@(#)sysctl.c 8.1 (Berkeley) 6/6/93";
#else
__RCSID("$NetBSD: sysctl.c,v 1.143 2012/06/02 21:38:09 dsl Exp $");
__RCSID("$NetBSD: sysctl.c,v 1.144 2012/11/29 02:06:17 christos Exp $");
#endif
#endif /* not lint */
#define FD_SETSIZE 0x10000
#include <sys/fd_set.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
@ -171,6 +173,7 @@ static void proc_limit(HANDLER_PROTO);
static void machdep_diskinfo(HANDLER_PROTO);
#endif /* CPU_DISKINFO */
static void mode_bits(HANDLER_PROTO);
static void reserve(HANDLER_PROTO);
static const struct handlespec {
const char *ps_re;
@ -210,7 +213,7 @@ static const struct handlespec {
{ "/net/(inet|inet6)/[^/]+/stats", printother, NULL, "netstat"},
{ "/net/bpf/(stats|peers)", printother, NULL, "netstat"},
{ "/net/inet.*/tcp.*/deb.*", printother, NULL, "trpt" },
{ "/net/inet.*/ip.*/anonportalgo/reserve", reserve, reserve, NULL },
{ "/net/ns/spp/deb.*", printother, NULL, "trsp" },
@ -2685,3 +2688,96 @@ mode_bits(HANDLER_ARGS)
}
}
}
static char *
bitmask_print(const fd_set *o)
{
char *s, *os;
s = os = NULL;
for (size_t i = 0; i < FD_SETSIZE; i++)
if (FD_ISSET(i, o)) {
int rv;
if (os)
rv = asprintf(&s, "%s,%zu", os, i);
else
rv = asprintf(&s, "%zu", i);
if (rv == -1)
err(1, "");
free(os);
os = s;
}
if (s == NULL && (s = strdup("")) == NULL)
err(1, "");
return s;
}
static void
bitmask_scan(const void *v, fd_set *o)
{
char *s = strdup(v);
if (s == NULL)
err(1, "");
FD_ZERO(o);
for (s = strtok(s, ","); s; s = strtok(NULL, ",")) {
char *e;
errno = 0;
unsigned long l = strtoul(s, &e, 0);
if ((l == ULONG_MAX && errno == ERANGE) || s == e || *e)
errx(1, "Invalid port: %s", s);
if (l >= FD_SETSIZE)
errx(1, "Port out of range: %s", s);
FD_SET(l, o);
}
}
static void
reserve(HANDLER_ARGS)
{
int rc;
size_t osz, nsz;
fd_set o, n;
if (fn)
trim_whitespace(value, 3);
osz = sizeof(o);
if (value) {
bitmask_scan(value, &n);
value = (char *)&n;
nsz = sizeof(n);
} else
nsz = 0;
rc = prog_sysctl(name, namelen, &o, &osz, value, nsz);
if (rc == -1) {
sysctlerror(value == NULL);
return;
}
if (value && qflag)
return;
if (rflag || xflag)
display_struct(pnode, sname, &o, sizeof(o),
value ? DISPLAY_OLD : DISPLAY_VALUE);
else {
char *s = bitmask_print(&o);
display_string(pnode, sname, s, strlen(s),
value ? DISPLAY_OLD : DISPLAY_VALUE);
free(s);
}
if (value) {
if (rflag || xflag)
display_struct(pnode, sname, &n, sizeof(n),
DISPLAY_NEW);
else {
char *s = bitmask_print(&n);
display_string(pnode, sname, s, strlen(s), DISPLAY_NEW);
free(s);
}
}
}