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/* $NetBSD: srtconfig.c,v 1.5 2019/03/25 23:43:56 pgoyette Exp $ */
/* This file is in the public domain. */
#include <stdio.h>
#include <errno.h>
#include <fcntl.h>
#include <stdlib.h>
#include <strings.h>
#include <sys/ioctl.h>
#include <arpa/inet.h>
#include <net/if_srt.h>
extern const char *__progname;
#define ACT_ERROR 1 /* none of the below */
#define ACT_QUERYALL 2 /* srtX */
#define ACT_QUERYONE 3 /* srtX N */
#define ACT_DEL 4 /* srtX del N */
#define ACT_ADD 5 /* srtX add srcaddr mask dstif dstaddr */
#define ACT_SET 6 /* srtX set N srcaddr mask dstif dstaddr */
#define ACT_FLAGS 7 /* srtX flags */
#define ACT_SFLAG 8 /* srtX flags [+|-]flag */
#define ACT_DEBUG 9 /* srtX debug */
static int action = ACT_ERROR;
static char *txt_dev;
static char *txt_n;
static char *txt_flg;
static char *txt_addr;
static char *txt_mask;
static char *txt_dstif;
static char *txt_dstaddr;
static int devfd;
static struct {
const char *name;
unsigned int bit;
} flagbits[] = { { "mtulock", SSF_MTULOCK },
{ 0, 0 } };
static void handleargs(int ac, char **av)
{
txt_dev = av[1];
if (ac == 2)
{ action = ACT_QUERYALL;
}
else if ((ac == 3) && !strcmp(av[2],"debug"))
{ action = ACT_DEBUG;
}
else if ((ac == 3) && !strcmp(av[2],"flags"))
{ action = ACT_FLAGS;
}
else if (ac == 3)
{ action = ACT_QUERYONE;
txt_n = av[2];
}
else if ((ac == 4) && !strcmp(av[2],"del"))
{ action = ACT_DEL;
txt_n = av[3];
}
else if ((ac == 4) && !strcmp(av[2],"flags"))
{ action = ACT_SFLAG;
txt_flg = av[3];
}
else if ((ac == 7) && !strcmp(av[2],"add"))
{ action = ACT_ADD;
txt_addr = av[3];
txt_mask = av[4];
txt_dstif = av[5];
txt_dstaddr = av[6];
}
else if ((ac == 8) && !strcmp(av[2],"set"))
{ action = ACT_SET;
txt_n = av[3];
txt_addr = av[4];
txt_mask = av[5];
txt_dstif = av[6];
txt_dstaddr = av[7];
}
if (action == ACT_ERROR)
{ fprintf(stderr,"Usage: %s srtX\n",__progname);
fprintf(stderr," %s srtX N\n",__progname);
fprintf(stderr," %s srtX del N\n",__progname);
fprintf(stderr," %s srtX add addr mask dstif dstaddr\n",__progname);
fprintf(stderr," %s srtX set N addr mask dstif dstaddr\n",__progname);
fprintf(stderr," %s srtX flags {[+|-]flag}\n",__progname);
fprintf(stderr," %s srtX debug\n",__progname);
exit(1);
}
}
static void open_dev(int how)
{
if (! index(txt_dev,'/'))
{ char *tmp;
asprintf(&tmp,"/dev/%s",txt_dev);
txt_dev = tmp;
}
devfd = open(txt_dev,how,0);
if (devfd < 0)
{ fprintf(stderr,"%s: can't open %s: %s\n",__progname,txt_dev,strerror(errno));
exit(1);
}
}
static void query_n(int n)
{
struct srt_rt r;
char obuf[64];
r.inx = n;
if (ioctl(devfd,SRT_GETRT,&r) < 0)
{ fprintf(stderr,"%s: can't get rt #%d: %s\n",__progname,n,strerror(errno));
return;
}
printf("%d:",n);
printf(" %s",inet_ntop(r.af,&r.srcmatch,&obuf[0],sizeof(obuf)));
printf(" /%d",r.srcmask);
printf(" %.*s",(int)sizeof(r.u.dstifn),&r.u.dstifn[0]);
switch (r.af)
{ case AF_INET:
printf(" %s",inet_ntoa(r.dst.sin.sin_addr));
break;
case AF_INET6:
printf(" %s",inet_ntop(AF_INET6,&r.dst.sin6.sin6_addr,&obuf[0],sizeof(obuf)));
break;
default:
printf(" ?af%d",r.af);
break;
}
printf("\n");
}
static void do_query(int narg)
{
int i;
int n;
open_dev(O_RDONLY);
if (narg >= 0)
{ query_n(narg);
}
else
{ if (ioctl(devfd,SRT_GETNRT,&n) < 0)
{ fprintf(stderr,"%s: can't get count: %s\n",__progname,strerror(errno));
exit(1);
}
for (i=0;i<n;i++) query_n(i);
}
}
static void do_del(unsigned int n)
{
open_dev(O_RDWR);
if (ioctl(devfd,SRT_DELRT,&n) < 0)
{ fprintf(stderr,"%s: can't delete #%u: %s\n",__progname,n,strerror(errno));
exit(1);
}
}
static void do_set(int n)
{
struct srt_rt r;
int w;
int maxw;
void *dp;
open_dev(O_RDWR);
if (n < 0)
{ unsigned int v;
if (ioctl(devfd,SRT_GETNRT,&v) < 0)
{ fprintf(stderr,"%s: can't get count: %s\n",__progname,strerror(errno));
exit(1);
}
n = v;
}
bzero(&r.dst,sizeof(r.dst));
r.inx = n;
if (inet_pton(AF_INET,txt_addr,&r.srcmatch.v4) == 1)
{ r.af = AF_INET;
r.dst.sin.sin_family = AF_INET;
r.dst.sin.sin_len = sizeof(r.dst.sin);
dp = &r.dst.sin.sin_addr;
maxw = 32;
}
else if (inet_pton(AF_INET6,txt_addr,&r.srcmatch.v6) == 1)
{ r.af = AF_INET6;
r.dst.sin6.sin6_family = AF_INET6;
r.dst.sin6.sin6_len = sizeof(r.dst.sin6);
dp = &r.dst.sin6.sin6_addr;
maxw = 128;
}
else
{ fprintf(stderr,"%s: %s: invalid match address\n",__progname,txt_addr);
exit(1);
}
if (txt_mask[0] == '/') txt_mask ++;
w = atoi(txt_mask);
if ((w < 0) || (w > maxw))
{ fprintf(stderr,"%s: %s: out-of-range CIDR width\n",__progname,txt_mask);
exit(1);
}
r.srcmask = w;
if (strlen(txt_dstif) > sizeof(r.u.dstifn)-1)
{ fprintf(stderr,"%s: %s: too long\n",__progname,txt_dstif);
exit(1);
}
strncpy(&r.u.dstifn[0],txt_dstif,sizeof(r.u.dstifn));
if (inet_pton(r.af,txt_dstaddr,dp) != 1)
{ fprintf(stderr,"%s: %s: invalid destination address\n",__progname,txt_dstaddr);
exit(1);
}
if (ioctl(devfd,SRT_SETRT,&r) < 0)
{ fprintf(stderr,"%s: can't set route: %s\n",__progname,strerror(errno));
exit(1);
}
}
static void do_flags(void)
{
unsigned int f;
int i;
open_dev(O_RDONLY);
if (ioctl(devfd,SRT_GFLAGS,&f) < 0)
{ fprintf(stderr,"%s: can't get flags: %s\n",__progname,strerror(errno));
exit(1);
}
for (i=0;flagbits[i].name;i++)
{ printf(" %c%s",(f&flagbits[i].bit)?'+':'-',flagbits[i].name);
f &= ~flagbits[i].bit;
}
if (f) printf(" +0x%x",f);
printf("\n");
}
static void do_sflag(void)
{
unsigned int f;
unsigned int b;
int i;
switch (txt_flg[0])
{ case '+': case '-': break;
default:
fprintf(stderr,"%s: last argument must be +flag or -flag\n",__progname);
exit(1);
break;
}
for (i=0;flagbits[i].name;i++) if (!strcmp(flagbits[i].name,txt_flg+1)) break;
if (! flagbits[i].name)
{ fprintf(stderr,"%s: unrecognized flag bit `%s'\n",__progname,txt_flg+1);
exit(1);
}
b = flagbits[i].bit;
open_dev(O_RDWR);
if (ioctl(devfd,SRT_GFLAGS,&f) < 0)
{ fprintf(stderr,"%s: can't get flags: %s\n",__progname,strerror(errno));
exit(1);
}
if (txt_flg[0] == '+') f |= b; else f &= ~b;
if (ioctl(devfd,SRT_SFLAGS,&f) < 0)
{ fprintf(stderr,"%s: can't set flags: %s\n",__progname,strerror(errno));
exit(1);
}
}
static void do_debug(void)
{
void *vp;
open_dev(O_RDWR);
vp = 0;
if (ioctl(devfd,SRT_DEBUG,&vp) < 0)
{ fprintf(stderr,"%s: can't SRT_DEBUG: %s\n",__progname,strerror(errno));
exit(1);
}
}
int main(int ac, char **av)
{
handleargs(ac,av);
switch (action)
{ case ACT_QUERYALL:
do_query(-1);
break;
case ACT_QUERYONE:
do_query(atoi(txt_n));
break;
case ACT_DEL:
do_del(atoi(txt_n));
break;
case ACT_ADD:
do_set(-1);
break;
case ACT_SET:
do_set(atoi(txt_n));
break;
case ACT_FLAGS:
do_flags();
break;
case ACT_SFLAG:
do_sflag();
break;
case ACT_DEBUG:
do_debug();
break;
default:
abort();
break;
}
exit(0);
}
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