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selftests: net: test IPV6_TCLASS

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Test setting IPV6_TCLASS via setsockopt and cmsg
across socket types.

Output without the kernel support (this series):

  Case TCLASS ICMP cmsg - packet data returned 1, expected 0
  Case TCLASS ICMP cmsg - rejection returned 0, expected 1
  Case TCLASS ICMP diff - pass returned 1, expected 0
  Case TCLASS ICMP diff - packet data returned 1, expected 0
  Case TCLASS ICMP diff - rejection returned 0, expected 1

Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jakub Kicinski 2022-02-16 17:21:18 -08:00 committed by David S. Miller
parent 6f97c7c605
commit 9657ad09e1
2 changed files with 69 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

51
tools/testing/selftests/net/cmsg_ipv6.sh
View file

@ -1,12 +1,16 @@
#!/bin/bash
# SPDX-License-Identifier: GPL-2.0
ksft_skip=4
NS=ns
IP6=2001:db8:1::1/64
TGT6=2001:db8:1::2
TMPF=`mktemp`
cleanup()
{
rm -f $TMPF
ip netns del $NS
}
@ -14,6 +18,12 @@ trap cleanup EXIT
NSEXE="ip netns exec $NS"
tcpdump -h | grep immediate-mode >> /dev/null
if [ $? -ne 0 ]; then
echo "SKIP - tcpdump with --immediate-mode option required"
exit $ksft_skip
fi
# Namespaces
ip netns add $NS
@ -55,6 +65,47 @@ for ovr in setsock cmsg both diff; do
done
done
# IPV6_TCLASS
TOS=0x10
TOS2=0x20
ip -6 -netns $NS rule add tos $TOS lookup 300
ip -6 -netns $NS route add table 300 prohibit any
for ovr in setsock cmsg both diff; do
for p in u i r; do
[ $p == "u" ] && prot=UDP
[ $p == "i" ] && prot=ICMP
[ $p == "r" ] && prot=RAW
[ $ovr == "setsock" ] && m="-C"
[ $ovr == "cmsg" ] && m="-c"
[ $ovr == "both" ] && m="-C $((TOS2)) -c"
[ $ovr == "diff" ] && m="-C $((TOS )) -c"
$NSEXE nohup tcpdump --immediate-mode -p -ni dummy0 -w $TMPF -c 4 2> /dev/null &
BG=$!
sleep 0.05
$NSEXE ./cmsg_sender -6 -p $p $m $((TOS2)) $TGT6 1234
check_result $? 0 "TCLASS $prot $ovr - pass"
while [ -d /proc/$BG ]; do
$NSEXE ./cmsg_sender -6 -p u $TGT6 1234
done
tcpdump -r $TMPF -v 2>&1 | grep "class $TOS2" >> /dev/null
check_result $? 0 "TCLASS $prot $ovr - packet data"
rm $TMPF
[ $ovr == "both" ] && m="-C $((TOS )) -c"
[ $ovr == "diff" ] && m="-C $((TOS2)) -c"
$NSEXE ./cmsg_sender -6 -p $p $m $((TOS)) -s $TGT6 1234
check_result $? 1 "TCLASS $prot $ovr - rejection"
done
done
# Summary
if [ $BAD -ne 0 ]; then
echo "FAIL - $BAD/$TOTAL cases failed"

19
tools/testing/selftests/net/cmsg_sender.c
View file

@ -46,6 +46,7 @@ struct options {
struct {
unsigned int mark;
unsigned int dontfrag;
unsigned int tclass;
} sockopt;
struct {
unsigned int family;
@ -62,6 +63,7 @@ struct options {
} ts;
struct {
struct option_cmsg_u32 dontfrag;
struct option_cmsg_u32 tclass;
} v6;
} opt = {
.size = 13,
@ -91,6 +93,8 @@ static void __attribute__((noreturn)) cs_usage(const char *bin)
"\t\t-t Enable time stamp reporting\n"
"\t\t-f val Set don't fragment via cmsg\n"
"\t\t-F val Set don't fragment via setsockopt\n"
"\t\t-c val Set TCLASS via cmsg\n"
"\t\t-C val Set TCLASS via setsockopt\n"
"");
exit(ERN_HELP);
}
@ -99,7 +103,7 @@ static void cs_parse_args(int argc, char *argv[])
{
char o;
while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:")) != -1) {
while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:")) != -1) {
switch (o) {
case 's':
opt.silent_send = true;
@ -147,6 +151,13 @@ static void cs_parse_args(int argc, char *argv[])
case 'F':
opt.sockopt.dontfrag = atoi(optarg);
break;
case 'c':
opt.v6.tclass.ena = true;
opt.v6.tclass.val = atoi(optarg);
break;
case 'C':
opt.sockopt.tclass = atoi(optarg);
break;
}
}
@ -202,6 +213,8 @@ cs_write_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
SOL_SOCKET, SO_MARK, &opt.mark);
ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
SOL_IPV6, IPV6_DONTFRAG, &opt.v6.dontfrag);
ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
SOL_IPV6, IPV6_TCLASS, &opt.v6.tclass);
if (opt.txtime.ena) {
struct sock_txtime so_txtime = {
@ -343,6 +356,10 @@ static void ca_set_sockopts(int fd)
setsockopt(fd, SOL_IPV6, IPV6_DONTFRAG,
&opt.sockopt.dontfrag, sizeof(opt.sockopt.dontfrag)))
error(ERN_SOCKOPT, errno, "setsockopt IPV6_DONTFRAG");
if (opt.sockopt.tclass &&
setsockopt(fd, SOL_IPV6, IPV6_TCLASS,
&opt.sockopt.tclass, sizeof(opt.sockopt.tclass)))
error(ERN_SOCKOPT, errno, "setsockopt IPV6_TCLASS");
}
int main(int argc, char *argv[])