From: arisawa <arisawa@ar.aichi-u.ac.jp>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
Subject: Re: [9fans] bug or feature ? --- ip/ping -6
Date: Thu, 31 Dec 2015 10:36:36 +0900 [thread overview]
Message-ID: <9F5F3F78-3D28-4E9D-A405-55E9269BE394@ar.aichi-u.ac.jp> (raw)
In-Reply-To: <F6F666B8-B189-4118-A139-98CEACC91878@gmail.com>
[-- Attachment #1: Type: text/plain, Size: 170 bytes --]
hello,
I did nothing about original ping options, so they should work as they have been.
I am afraid I have removed too much.
the new ping is here. test, please.
[-- Attachment #2: ping.c --]
[-- Type: application/octet-stream, Size: 10501 bytes --]
/* ping for ip v4 and v6 */
#include <u.h>
#include <libc.h>
#include <ctype.h>
#include <ip.h>
#include <bio.h>
#include <ndb.h>
#include "icmp.h"
enum {
MAXMSG = 32,
SLEEPMS = 1000,
SECOND = 1000000000LL,
MINUTE = 60*SECOND,
};
typedef struct Req Req;
struct Req
{
ushort seq; /* sequence number */
vlong time; /* time sent */
vlong rtt;
int ttl;
int replied;
Req *next;
};
typedef struct {
int version;
char *net;
int echocmd;
int echoreply;
unsigned iphdrsz;
void (*prreply)(Req *r, void *v);
void (*prlost)(ushort seq, void *v);
} Proto;
Req *first; /* request list */
Req *last; /* ... */
Lock listlock;
char *argv0;
int addresses;
int debug;
int done;
int flood;
int lostmsgs;
int lostonly;
int quiet;
int rcvdmsgs;
int rint;
ushort firstseq;
vlong sum;
int waittime = 5000;
static char *network, *target;
void lost(Req*, void*);
void reply(Req*, void*);
static void
usage(void)
{
fprint(2,
"usage: %s [-6alq] [-s msgsize] [-i millisecs] [-n #pings] dest\n",
argv0);
exits("usage");
}
static void
catch(void *a, char *msg)
{
USED(a);
if(strstr(msg, "alarm"))
noted(NCONT);
else if(strstr(msg, "die"))
exits("errors");
else
noted(NDFLT);
}
static void
prlost4(ushort seq, void *v)
{
Ip4hdr *ip4 = v;
print("lost %ud: %V -> %V\n", seq, ip4->src, ip4->dst);
}
static void
prlost6(ushort seq, void *v)
{
Ip6hdr *ip6 = v;
print("lost %ud: %I -> %I\n", seq, ip6->src, ip6->dst);
}
static void
prreply4(Req *r, void *v)
{
Ip4hdr *ip4 = v;
print("%ud: %V -> %V rtt %lld µs, avg rtt %lld µs, ttl = %d\n",
r->seq - firstseq, ip4->src, ip4->dst, r->rtt, sum/rcvdmsgs,
r->ttl);
}
static void
prreply6(Req *r, void *v)
{
Ip6hdr *ip6 = v;
print("%ud: %I -> %I rtt %lld µs, avg rtt %lld µs, ttl = %d\n",
r->seq - firstseq, ip6->src, ip6->dst, r->rtt, sum/rcvdmsgs,
r->ttl);
}
static Proto v4pr = {
4, "icmp",
EchoRequest, EchoReply,
IPV4HDR_LEN,
prreply4, prlost4,
};
static Proto v6pr = {
6, "icmpv6",
EchoRequestV6, EchoReplyV6,
IPV6HDR_LEN,
prreply6, prlost6,
};
static Proto *proto = &v4pr;
Icmphdr *
geticmp(void *v)
{
char *p = v;
return (Icmphdr *)(p + proto->iphdrsz);
}
void
clean(ushort seq, vlong now, void *v)
{
int ttl;
Req **l, *r;
ttl = 0;
if (v) {
if (proto->version == 4)
ttl = ((Ip4hdr *)v)->ttl;
else
ttl = ((Ip6hdr *)v)->ttl;
}
lock(&listlock);
last = nil;
for(l = &first; *l; ){
r = *l;
if(v && r->seq == seq){
r->rtt = now-r->time;
r->ttl = ttl;
reply(r, v);
}
if(now-r->time > MINUTE){
*l = r->next;
r->rtt = now-r->time;
if(v)
r->ttl = ttl;
if(r->replied == 0)
lost(r, v);
free(r);
}else{
last = r;
l = &r->next;
}
}
unlock(&listlock);
}
static uchar loopbacknet[IPaddrlen] = {
0, 0, 0, 0,
0, 0, 0, 0,
0, 0, 0xff, 0xff,
127, 0, 0, 0
};
static uchar loopbackmask[IPaddrlen] = {
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
0xff, 0, 0, 0
};
/*
* find first ip addr suitable for proto and
* that isn't the friggin loopback address.
* deprecate link-local and multicast addresses.
*/
static int
myipvnaddr(uchar *ip, Proto *proto, char *net)
{
int ipisv4, wantv4;
Ipifc *nifc;
Iplifc *lifc;
uchar mynet[IPaddrlen], linklocal[IPaddrlen];
static Ipifc *ifc;
ipmove(linklocal, IPnoaddr);
wantv4 = proto->version == 4;
ifc = readipifc(net, ifc, -1);
for(nifc = ifc; nifc; nifc = nifc->next)
for(lifc = nifc->lifc; lifc; lifc = lifc->next){
maskip(lifc->ip, loopbackmask, mynet);
if(ipcmp(mynet, loopbacknet) == 0)
continue;
if(ISIPV6MCAST(lifc->ip) || ISIPV6LINKLOCAL(lifc->ip)) {
ipmove(linklocal, lifc->ip);
continue;
}
ipisv4 = isv4(lifc->ip) != 0;
if(ipcmp(lifc->ip, IPnoaddr) != 0 && wantv4 == ipisv4){
ipmove(ip, lifc->ip);
return 0;
}
}
/* no global unicast addrs found, fall back to link-local, if any */
ipmove(ip, linklocal);
return ipcmp(ip, IPnoaddr) == 0? -1: 0;
}
void
sender(int fd, int msglen, int interval, int n)
{
int i, extra;
ushort seq;
char buf[64*1024+512];
uchar me[IPaddrlen], mev4[IPv4addrlen];
Icmphdr *icmp;
Req *r;
srand(time(0));
firstseq = seq = rand();
icmp = geticmp(buf);
memset(buf, 0, proto->iphdrsz + ICMP_HDRSIZE);
for(i = proto->iphdrsz + ICMP_HDRSIZE; i < msglen; i++)
buf[i] = i;
icmp->type = proto->echocmd;
icmp->code = 0;
/* arguably the kernel should fill in the right src addr. */
myipvnaddr(me, proto, network);
if (proto->version == 4) {
v6tov4(mev4, me);
memmove(((Ip4hdr *)buf)->src, mev4, IPv4addrlen);
} else
ipmove(((Ip6hdr *)buf)->src, me);
if (addresses)
print("\t%I -> %s\n", me, target);
if(rint != 0 && interval <= 0)
rint = 0;
extra = 0;
for(i = 0; i < n; i++){
if(i != 0){
if(rint != 0)
extra = nrand(interval);
sleep(interval + extra);
}
r = malloc(sizeof *r);
if (r == nil)
continue;
hnputs(icmp->seq, seq);
r->seq = seq;
r->next = nil;
r->replied = 0;
r->time = nsec(); /* avoid early free in reply! */
lock(&listlock);
if(first == nil)
first = r;
else
last->next = r;
last = r;
unlock(&listlock);
r->time = nsec();
if(write(fd, buf, msglen) < msglen){
fprint(2, "%s: write failed: %r\n", argv0);
return;
}
seq++;
}
done = 1;
}
void
rcvr(int fd, int msglen, int interval, int nmsg)
{
int i, n, munged;
ushort x;
vlong now;
char err[ERRMAX];
uchar buf[64*1024+512];
Icmphdr *icmp;
Req *r;
sum = 0;
while(lostmsgs+rcvdmsgs < nmsg){
alarm((nmsg-lostmsgs-rcvdmsgs)*interval+waittime);
n = read(fd, buf, sizeof buf);
alarm(0);
if(n == 0)
strcpy(err, "got eof");
else if(n < 0)
rerrstr(err, sizeof(err));
now = nsec();
if(n <= 0){
print("%s\n", err);
clean(0, now+MINUTE, nil);
if(strstr(err, "interrupted") == nil)
sleep(waittime);
continue;
}
if(n < msglen){
print("bad len %d/%d\n", n, msglen);
continue;
}
icmp = geticmp(buf);
munged = 0;
for(i = proto->iphdrsz + ICMP_HDRSIZE; i < msglen; i++)
if(buf[i] != (uchar)i)
munged++;
if(munged)
print("corrupted reply\n");
x = nhgets(icmp->seq);
if(icmp->type != proto->echoreply || icmp->code != 0) {
print("bad type/code/sequence %d/%d/%d (want %d/%d/%d)\n",
icmp->type, icmp->code, x,
proto->echoreply, 0, x);
continue;
}
clean(x, now, buf);
}
lock(&listlock);
for(r = first; r; r = r->next)
if(r->replied == 0)
lostmsgs++;
unlock(&listlock);
if(!quiet && lostmsgs)
print("%d out of %d messages lost\n", lostmsgs,
lostmsgs+rcvdmsgs);
}
static int
isdottedquad(char *name)
{
int dot = 0, digit = 0;
for (; *name != '\0'; name++)
if (*name == '.')
dot++;
else if (isdigit(*name))
digit++;
else
return 0;
return dot && digit;
}
static int
isv6lit(char *name)
{
int colon = 0, hex = 0;
for (; *name != '\0'; name++)
if (*name == ':')
colon++;
else if (isxdigit(*name))
hex++;
else
return 0;
return colon;
}
char *
nametoip(char *cs, char *name, int ipver)
{
int n,fd;
char buf[128], *p, *addr, *ip;
if(isdottedquad(name) || isv6lit(name))
return strdup(name);
if(cs == nil)
cs = "/net/cs";
fd = open(cs, ORDWR);
if(fd < 0)
sysfatal("cannot open %s: %r", cs);
addr = smprint("tcp!%s!1", name);
if(write(fd, addr, strlen(addr)) != strlen(addr)){
close(fd);
sysfatal("cannot write %s to%s: %r", addr, cs);
}
free(addr);
seek(fd, 0, 0);
while((n = read(fd, buf, sizeof(buf)-1)) > 0){
buf[n] = 0;
ip = strchr(buf,' ');
ip++;
p = strchr(ip,'!');
*p = 0;
if(ipver == 4 && isdottedquad(ip)){
close(fd);
return strdup(ip);
}
if(ipver == 6 && isv6lit(ip)){
close(fd);
return strdup(ip);
}
}
close(fd);
return nil;
}
void
main(int argc, char **argv)
{
int fd, msglen, interval, nmsg;
char *ds;
nsec(); /* make sure time file is already open */
fmtinstall('V', eipfmt);
fmtinstall('I', eipfmt);
msglen = interval = 0;
nmsg = MAXMSG;
ARGBEGIN {
case '6':
proto = &v6pr;
break;
case 'a':
addresses = 1;
break;
case 'd':
debug++;
break;
case 'f':
flood = 1;
break;
case 'i':
interval = atoi(EARGF(usage()));
if(interval < 0)
usage();
break;
case 'l':
lostonly++;
break;
case 'n':
nmsg = atoi(EARGF(usage()));
if(nmsg < 0)
usage();
break;
case 'q':
quiet = 1;
break;
case 'r':
rint = 1;
break;
case 's':
msglen = atoi(EARGF(usage()));
break;
case 'w':
waittime = atoi(EARGF(usage()));
if(waittime < 0)
usage();
break;
default:
usage();
break;
} ARGEND;
if(msglen < proto->iphdrsz + ICMP_HDRSIZE)
msglen = proto->iphdrsz + ICMP_HDRSIZE;
if(msglen < 64)
msglen = 64;
if(msglen >= 64*1024)
msglen = 64*1024-1;
if(interval <= 0 && !flood)
interval = SLEEPMS;
if(argc < 1)
usage();
notify(catch);
target = nametoip(nil,argv[0],proto->version);
if(isdottedquad(target))
proto = &v4pr;
else
if(isv6lit(target))
proto = &v6pr;
ds = netmkaddr(target, proto->net, "1");
fd = dial(ds, 0, 0, 0);
if(fd < 0){
fprint(2, "%s: couldn't dial %s: %r\n", argv0, ds);
exits("dialing");
}
if (!quiet)
print("sending %d %d byte messages %d ms apart to %s\n",
nmsg, msglen, interval, ds);
switch(rfork(RFPROC|RFMEM|RFFDG)){
case -1:
fprint(2, "%s: can't fork: %r\n", argv0);
exits("forking");
case 0:
rcvr(fd, msglen, interval, nmsg);
exits(0);
default:
sender(fd, msglen, interval, nmsg);
wait();
exits(lostmsgs ? "lost messages" : "");
}
}
void
reply(Req *r, void *v)
{
r->rtt /= 1000LL;
sum += r->rtt;
if(!r->replied)
rcvdmsgs++;
if(!quiet && !lostonly)
if(addresses)
(*proto->prreply)(r, v);
else
print("%ud: rtt %lld µs, avg rtt %lld µs, ttl = %d\n",
r->seq - firstseq, r->rtt, sum/rcvdmsgs, r->ttl);
r->replied = 1;
}
void
lost(Req *r, void *v)
{
if(!quiet)
if(addresses && v != nil)
(*proto->prlost)(r->seq - firstseq, v);
else
print("lost %ud\n", r->seq - firstseq);
lostmsgs++;
}
[-- Attachment #3: Type: text/plain, Size: 1160 bytes --]
> 2015/12/31 7:43、Kenny Lasse Hoff Levinsen <kennylevinsen@gmail.com> のメール:
>
> It is not a common factor if you ping broadcast. That is, the local address is common, the remote is not.
>
> joushou
>
>> On 30 Dec 2015, at 20:05, Steve Simon <steve@quintile.net> wrote:
>>
>> I would display the IP address once only, rather on every line; as it is a common factor.
>>
>> -Steve
>>
>>
>>> On 30 Dec 2015, at 15:26, Kurt H Maier <khm@sciops.net> wrote:
>>>
>>>> On Wed, Dec 30, 2015 at 03:05:33PM +0000, Steve Simon wrote:
>>>> If I where redesigning ping I wouldn't repeat any info that is common on each line - I.e. ip addresses or the column titles: rtt, ave etc.
>>>>
>>>> consider plan9's ps(1) which has no column titles. they are described in the man page and are obvious from the context once you have read the man page once.
>>>>
>>>> Having said this, I understand that tradition is also a strong guiding principal.
>>>>
>>>> -Steve
>>>
>>> I have no opinion on the labeling, but dropping the IPs from the output
>>> would make this tool useless for logging data.
>>>
>>> khm
>>
>
>
next prev parent reply other threads:[~2015-12-31 1:36 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-12-28 9:04 arisawa
2015-12-29 0:10 ` Anthony Martin
2015-12-30 12:48 ` arisawa
2015-12-30 13:21 ` Charles Forsyth
2015-12-30 15:05 ` Steve Simon
2015-12-30 15:26 ` Kurt H Maier
2015-12-30 19:05 ` Steve Simon
2015-12-30 22:43 ` Kenny Lasse Hoff Levinsen
2015-12-30 23:36 ` Steve Simon
2015-12-31 0:16 ` Bakul Shah
2015-12-31 1:36 ` arisawa [this message]
2015-12-31 3:44 ` Dave Eckhardt
2016-01-02 1:12 ` erik quanstrom
2016-01-02 1:54 ` erik quanstrom
2016-01-03 19:58 ` hiro
2016-01-03 20:04 ` erik quanstrom
2016-01-03 20:31 ` erik quanstrom
2016-01-03 21:40 ` hiro
2016-01-03 21:43 ` hiro
2016-01-03 21:47 ` erik quanstrom
2016-01-04 1:31 ` erik quanstrom
2016-01-04 10:51 ` Anthony Martin
2016-01-04 13:04 ` erik quanstrom
2016-01-04 13:58 ` erik quanstrom
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