Re: traceroute TOS
Thanks, useful(at least for me).
On Apr 5, 2011, at 5:57 PM, Stuart Henderson wrote:
On 2011/04/05 16:51, Stuart Henderson wrote:
if -t is used, display a notice when the TOS changes en-route.
ok?
oh, it's better with a (contrived) example:
$ traceroute -nt 7 naiad
traceroute to naiad.spacehopper.org (195.95.187.35), 64 hops max, 40 byte
packets
1 85.158.44.145 0.441 ms (TOS=33!) 0.328 ms 0.396 ms
2 193.178.223.245 14.637 ms 15.213 ms 15.466 ms
3 194.39.143.145 16.600 ms 15.468 ms 16.206 ms
4 194.39.143.205 16.483 ms 16.210 ms 15.843 ms
5 193.203.5.182 17.475 ms 16.708 ms 16.986 ms
6 195.95.187.248 17.211 ms (TOS=4!) 16.460 ms 16.468 ms
7 195.95.187.35 27.99 ms 16.207 ms 17.467 ms
Index: traceroute.8
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.8,v
retrieving revision 1.44
diff -u -p -r1.44 traceroute.8
--- traceroute.8 8 Jul 2010 20:23:03 - 1.44
+++ traceroute.8 5 Apr 2011 15:50:38 -
@@ -177,6 +177,8 @@ in probe packets to the following value
The value must be a decimal integer in the range 0 to 255.
This option can be used to
see if different types-of-service result in different paths.
+If this option is used, changes to the type-of-service in the
+returned packets are displayed.
(If you are not running a
.Bx 4.3 tahoe
or later system, this may be academic since the normal network
@@ -384,6 +386,8 @@ ever occur and the associated gateway is
(destination network or host unreachable for TOS),
.Sy !code
(other ICMP unreachable code).
+.Sy TOS=xxx
+(TOS bit in returned packet differs from last hop).
If almost all the probes result in some kind of unreachable,
.Nm
will give up and exit.
Index: traceroute.c
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.c,v
retrieving revision 1.74
diff -u -p -r1.74 traceroute.c
--- traceroute.c 22 Mar 2011 10:16:23 - 1.74
+++ traceroute.c 5 Apr 2011 15:50:38 -
@@ -293,11 +293,13 @@ main(int argc, char *argv[])
int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
int ttl_flag = 0, incflag = 1, protoset = 0, sump = 0;
int ch, i, lsrr = 0, on = 1, probe, seq = 0, tos = 0;
+int last_tos, tos_returned;
size_t size = sizeof(max_ttl);
struct sockaddr_in from, to;
struct hostent *hp;
u_int32_t tmprnd;
-struct ip *ip;
+struct ip *ip, *inner_ip;
+struct icmp *icp;
u_int8_t ttl;
char *ep;
const char *errstr;
@@ -427,7 +429,7 @@ main(int argc, char *argv[])
l = strtol(optarg, ep, 10);
if (errno || !*optarg || *ep || l 0 || l 255)
errx(1, tos must be 0 to 255.);
-tos = (int)l;
+last_tos = tos = (int)l;
break;
case 'v':
verbose++;
@@ -636,9 +638,21 @@ main(int argc, char *argv[])
++got_there;
break;
}
+
+icp = (struct icmp *) (((u_char
*)ip)+(ip-ip_hl2));
+inner_ip = (struct ip *) (((u_char *)icp)+8);
+
+tos_returned = inner_ip-ip_tos;
+
+if (tos_returned != last_tos)
+printf ( (TOS=%d!), tos_returned);
+
+last_tos = tos_returned;
+
/* time exceeded in transit */
if (i == -1)
break;
+
code = i - 1;
switch (code) {
case ICMP_UNREACH_PORT:
Re: traceroute TOS
On Tue, Apr 05, 2011 at 04:57:30PM +0100, Stuart Henderson wrote:
On 2011/04/05 16:51, Stuart Henderson wrote:
if -t is used, display a notice when the TOS changes en-route.
ok?
oh, it's better with a (contrived) example:
$ traceroute -nt 7 naiad
traceroute to naiad.spacehopper.org (195.95.187.35), 64 hops max, 40 byte
packets
1 85.158.44.145 0.441 ms (TOS=33!) 0.328 ms 0.396 ms
2 193.178.223.245 14.637 ms 15.213 ms 15.466 ms
3 194.39.143.145 16.600 ms 15.468 ms 16.206 ms
4 194.39.143.205 16.483 ms 16.210 ms 15.843 ms
5 193.203.5.182 17.475 ms 16.708 ms 16.986 ms
6 195.95.187.248 17.211 ms (TOS=4!) 16.460 ms 16.468 ms
7 195.95.187.35 27.99 ms 16.207 ms 17.467 ms
Diff looks good. What I don't like to specify and display the TOS as
decimal since I have no idea what decimal numbers are which TOS/DiffServ
Code points. No that is porbably a different diff, so OK claudio@ for this
one.
Index: traceroute.8
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.8,v
retrieving revision 1.44
diff -u -p -r1.44 traceroute.8
--- traceroute.88 Jul 2010 20:23:03 - 1.44
+++ traceroute.85 Apr 2011 15:50:38 -
@@ -177,6 +177,8 @@ in probe packets to the following value
The value must be a decimal integer in the range 0 to 255.
This option can be used to
see if different types-of-service result in different paths.
+If this option is used, changes to the type-of-service in the
+returned packets are displayed.
(If you are not running a
.Bx 4.3 tahoe
or later system, this may be academic since the normal network
@@ -384,6 +386,8 @@ ever occur and the associated gateway is
(destination network or host unreachable for TOS),
.Sy !code
(other ICMP unreachable code).
+.Sy TOS=xxx
+(TOS bit in returned packet differs from last hop).
If almost all the probes result in some kind of unreachable,
.Nm
will give up and exit.
Index: traceroute.c
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.c,v
retrieving revision 1.74
diff -u -p -r1.74 traceroute.c
--- traceroute.c22 Mar 2011 10:16:23 - 1.74
+++ traceroute.c5 Apr 2011 15:50:38 -
@@ -293,11 +293,13 @@ main(int argc, char *argv[])
int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
int ttl_flag = 0, incflag = 1, protoset = 0, sump = 0;
int ch, i, lsrr = 0, on = 1, probe, seq = 0, tos = 0;
+ int last_tos, tos_returned;
size_t size = sizeof(max_ttl);
struct sockaddr_in from, to;
struct hostent *hp;
u_int32_t tmprnd;
- struct ip *ip;
+ struct ip *ip, *inner_ip;
+ struct icmp *icp;
u_int8_t ttl;
char *ep;
const char *errstr;
@@ -427,7 +429,7 @@ main(int argc, char *argv[])
l = strtol(optarg, ep, 10);
if (errno || !*optarg || *ep || l 0 || l 255)
errx(1, tos must be 0 to 255.);
- tos = (int)l;
+ last_tos = tos = (int)l;
break;
case 'v':
verbose++;
@@ -636,9 +638,21 @@ main(int argc, char *argv[])
++got_there;
break;
}
+
+ icp = (struct icmp *) (((u_char
*)ip)+(ip-ip_hl2));
+ inner_ip = (struct ip *) (((u_char *)icp)+8);
+
+ tos_returned = inner_ip-ip_tos;
+
+ if (tos_returned != last_tos)
+ printf ( (TOS=%d!), tos_returned);
+
+ last_tos = tos_returned;
+
/* time exceeded in transit */
if (i == -1)
break;
+
code = i - 1;
switch (code) {
case ICMP_UNREACH_PORT:
--
:wq Claudio
Re: traceroute TOS
On 2011/04/06 13:35, Claudio Jeker wrote: On Tue, Apr 05, 2011 at 04:57:30PM +0100, Stuart Henderson wrote: On 2011/04/05 16:51, Stuart Henderson wrote: if -t is used, display a notice when the TOS changes en-route. ok? oh, it's better with a (contrived) example: $ traceroute -nt 7 naiad traceroute to naiad.spacehopper.org (195.95.187.35), 64 hops max, 40 byte packets 1 85.158.44.145 0.441 ms (TOS=33!) 0.328 ms 0.396 ms 2 193.178.223.245 14.637 ms 15.213 ms 15.466 ms 3 194.39.143.145 16.600 ms 15.468 ms 16.206 ms 4 194.39.143.205 16.483 ms 16.210 ms 15.843 ms 5 193.203.5.182 17.475 ms 16.708 ms 16.986 ms 6 195.95.187.248 17.211 ms (TOS=4!) 16.460 ms 16.468 ms 7 195.95.187.35 27.99 ms 16.207 ms 17.467 ms Diff looks good. What I don't like to specify and display the TOS as decimal since I have no idea what decimal numbers are which TOS/DiffServ Code points. No that is porbably a different diff, so OK claudio@ for this one. I agree, I think we would also want to be able to use these in -t (-t lowdelay, -t af11, etc.)
traceroute TOS
if -t is used, display a notice when the TOS changes en-route.
ok?
Index: traceroute.8
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.8,v
retrieving revision 1.44
diff -u -p -r1.44 traceroute.8
--- traceroute.88 Jul 2010 20:23:03 - 1.44
+++ traceroute.85 Apr 2011 15:50:38 -
@@ -177,6 +177,8 @@ in probe packets to the following value
The value must be a decimal integer in the range 0 to 255.
This option can be used to
see if different types-of-service result in different paths.
+If this option is used, changes to the type-of-service in the
+returned packets are displayed.
(If you are not running a
.Bx 4.3 tahoe
or later system, this may be academic since the normal network
@@ -384,6 +386,8 @@ ever occur and the associated gateway is
(destination network or host unreachable for TOS),
.Sy !code
(other ICMP unreachable code).
+.Sy TOS=xxx
+(TOS bit in returned packet differs from last hop).
If almost all the probes result in some kind of unreachable,
.Nm
will give up and exit.
Index: traceroute.c
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.c,v
retrieving revision 1.74
diff -u -p -r1.74 traceroute.c
--- traceroute.c22 Mar 2011 10:16:23 - 1.74
+++ traceroute.c5 Apr 2011 15:50:38 -
@@ -293,11 +293,13 @@ main(int argc, char *argv[])
int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
int ttl_flag = 0, incflag = 1, protoset = 0, sump = 0;
int ch, i, lsrr = 0, on = 1, probe, seq = 0, tos = 0;
+ int last_tos, tos_returned;
size_t size = sizeof(max_ttl);
struct sockaddr_in from, to;
struct hostent *hp;
u_int32_t tmprnd;
- struct ip *ip;
+ struct ip *ip, *inner_ip;
+ struct icmp *icp;
u_int8_t ttl;
char *ep;
const char *errstr;
@@ -427,7 +429,7 @@ main(int argc, char *argv[])
l = strtol(optarg, ep, 10);
if (errno || !*optarg || *ep || l 0 || l 255)
errx(1, tos must be 0 to 255.);
- tos = (int)l;
+ last_tos = tos = (int)l;
break;
case 'v':
verbose++;
@@ -636,9 +638,21 @@ main(int argc, char *argv[])
++got_there;
break;
}
+
+ icp = (struct icmp *) (((u_char
*)ip)+(ip-ip_hl2));
+ inner_ip = (struct ip *) (((u_char *)icp)+8);
+
+ tos_returned = inner_ip-ip_tos;
+
+ if (tos_returned != last_tos)
+ printf ( (TOS=%d!), tos_returned);
+
+ last_tos = tos_returned;
+
/* time exceeded in transit */
if (i == -1)
break;
+
code = i - 1;
switch (code) {
case ICMP_UNREACH_PORT:
Re: traceroute TOS
On 2011/04/05 16:51, Stuart Henderson wrote:
if -t is used, display a notice when the TOS changes en-route.
ok?
oh, it's better with a (contrived) example:
$ traceroute -nt 7 naiad
traceroute to naiad.spacehopper.org (195.95.187.35), 64 hops max, 40 byte
packets
1 85.158.44.145 0.441 ms (TOS=33!) 0.328 ms 0.396 ms
2 193.178.223.245 14.637 ms 15.213 ms 15.466 ms
3 194.39.143.145 16.600 ms 15.468 ms 16.206 ms
4 194.39.143.205 16.483 ms 16.210 ms 15.843 ms
5 193.203.5.182 17.475 ms 16.708 ms 16.986 ms
6 195.95.187.248 17.211 ms (TOS=4!) 16.460 ms 16.468 ms
7 195.95.187.35 27.99 ms 16.207 ms 17.467 ms
Index: traceroute.8
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.8,v
retrieving revision 1.44
diff -u -p -r1.44 traceroute.8
--- traceroute.8 8 Jul 2010 20:23:03 - 1.44
+++ traceroute.8 5 Apr 2011 15:50:38 -
@@ -177,6 +177,8 @@ in probe packets to the following value
The value must be a decimal integer in the range 0 to 255.
This option can be used to
see if different types-of-service result in different paths.
+If this option is used, changes to the type-of-service in the
+returned packets are displayed.
(If you are not running a
.Bx 4.3 tahoe
or later system, this may be academic since the normal network
@@ -384,6 +386,8 @@ ever occur and the associated gateway is
(destination network or host unreachable for TOS),
.Sy !code
(other ICMP unreachable code).
+.Sy TOS=xxx
+(TOS bit in returned packet differs from last hop).
If almost all the probes result in some kind of unreachable,
.Nm
will give up and exit.
Index: traceroute.c
===
RCS file: /cvs/src/usr.sbin/traceroute/traceroute.c,v
retrieving revision 1.74
diff -u -p -r1.74 traceroute.c
--- traceroute.c 22 Mar 2011 10:16:23 - 1.74
+++ traceroute.c 5 Apr 2011 15:50:38 -
@@ -293,11 +293,13 @@ main(int argc, char *argv[])
int mib[4] = { CTL_NET, PF_INET, IPPROTO_IP, IPCTL_DEFTTL };
int ttl_flag = 0, incflag = 1, protoset = 0, sump = 0;
int ch, i, lsrr = 0, on = 1, probe, seq = 0, tos = 0;
+ int last_tos, tos_returned;
size_t size = sizeof(max_ttl);
struct sockaddr_in from, to;
struct hostent *hp;
u_int32_t tmprnd;
- struct ip *ip;
+ struct ip *ip, *inner_ip;
+ struct icmp *icp;
u_int8_t ttl;
char *ep;
const char *errstr;
@@ -427,7 +429,7 @@ main(int argc, char *argv[])
l = strtol(optarg, ep, 10);
if (errno || !*optarg || *ep || l 0 || l 255)
errx(1, tos must be 0 to 255.);
- tos = (int)l;
+ last_tos = tos = (int)l;
break;
case 'v':
verbose++;
@@ -636,9 +638,21 @@ main(int argc, char *argv[])
++got_there;
break;
}
+
+ icp = (struct icmp *) (((u_char
*)ip)+(ip-ip_hl2));
+ inner_ip = (struct ip *) (((u_char *)icp)+8);
+
+ tos_returned = inner_ip-ip_tos;
+
+ if (tos_returned != last_tos)
+ printf ( (TOS=%d!), tos_returned);
+
+ last_tos = tos_returned;
+
/* time exceeded in transit */
if (i == -1)
break;
+
code = i - 1;
switch (code) {
case ICMP_UNREACH_PORT:
