* [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg
@ 2022-02-17 1:21 Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 1/5] " Jakub Kicinski
` (5 more replies)
0 siblings, 6 replies; 7+ messages in thread
From: Jakub Kicinski @ 2022-02-17 1:21 UTC (permalink / raw)
To: davem
Cc: netdev, willemb, lorenzo, maze, dsahern, yoshfuji, shuah,
linux-kselftest, Jakub Kicinski
Support for IPV6_HOPLIMIT, IPV6_TCLASS, IPV6_DONTFRAG on ICMPv6
sockets and associated tests. I have no immediate plans to
implement IPV6_FLOWINFO and all the extension header stuff.
Jakub Kicinski (5):
net: ping6: support setting basic SOL_IPV6 options via cmsg
selftests: net: test IPV6_DONTFRAG
selftests: net: test IPV6_TCLASS
selftests: net: test IPV6_HOPLIMIT
selftests: net: basic test for IPV6_2292*
net/ipv6/ip6_output.c | 1 +
net/ipv6/ping.c | 21 ++-
tools/testing/selftests/net/cmsg_ipv6.sh | 156 ++++++++++++++++++++
tools/testing/selftests/net/cmsg_sender.c | 170 +++++++++++++++++++---
4 files changed, 320 insertions(+), 28 deletions(-)
create mode 100755 tools/testing/selftests/net/cmsg_ipv6.sh
--
2.34.1
^ permalink raw reply [flat|nested] 7+ messages in thread
* [PATCH net-next 1/5] net: ping6: support setting basic SOL_IPV6 options via cmsg
2022-02-17 1:21 [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg Jakub Kicinski
@ 2022-02-17 1:21 ` Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 2/5] selftests: net: test IPV6_DONTFRAG Jakub Kicinski
` (4 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Jakub Kicinski @ 2022-02-17 1:21 UTC (permalink / raw)
To: davem
Cc: netdev, willemb, lorenzo, maze, dsahern, yoshfuji, shuah,
linux-kselftest, Jakub Kicinski
Support setting IPV6_HOPLIMIT, IPV6_TCLASS, IPV6_DONTFRAG
during sendmsg via SOL_IPV6 cmsgs.
tclass and dontfrag are init'ed from struct ipv6_pinfo in
ipcm6_init_sk(), while hlimit is inited to -1, so we need
to handle it being populated via cmsg explicitly.
Leave extension headers and flowlabel unimplemented.
Those are slightly more laborious to test and users
seem to primarily care about IPV6_TCLASS.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
net/ipv6/ip6_output.c | 1 +
net/ipv6/ping.c | 21 ++++++++++++++++-----
2 files changed, 17 insertions(+), 5 deletions(-)
diff --git a/net/ipv6/ip6_output.c b/net/ipv6/ip6_output.c
index 0c6c971ce0a5..3286b64ec03d 100644
--- a/net/ipv6/ip6_output.c
+++ b/net/ipv6/ip6_output.c
@@ -1487,6 +1487,7 @@ static int __ip6_append_data(struct sock *sk,
if (cork->length + length > mtu - headersize && ipc6->dontfrag &&
(sk->sk_protocol == IPPROTO_UDP ||
+ sk->sk_protocol == IPPROTO_ICMPV6 ||
sk->sk_protocol == IPPROTO_RAW)) {
ipv6_local_rxpmtu(sk, fl6, mtu - headersize +
sizeof(struct ipv6hdr));
diff --git a/net/ipv6/ping.c b/net/ipv6/ping.c
index d5544cf67ffe..ff033d16549e 100644
--- a/net/ipv6/ping.c
+++ b/net/ipv6/ping.c
@@ -101,11 +101,21 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
ipc6.sockc.tsflags = sk->sk_tsflags;
ipc6.sockc.mark = sk->sk_mark;
- err = sock_cmsg_send(sk, msg, &ipc6.sockc);
- if (err)
- return err;
+ if (msg->msg_controllen) {
+ struct ipv6_txoptions opt = {};
+
+ opt.tot_len = sizeof(opt);
+ ipc6.opt = &opt;
- /* TODO: use ip6_datagram_send_ctl to get options from cmsg */
+ err = ip6_datagram_send_ctl(sock_net(sk), sk, msg, &fl6, &ipc6);
+ if (err < 0)
+ return err;
+
+ /* Changes to txoptions and flow info are not implemented, yet.
+ * Drop the options, fl6 is wiped below.
+ */
+ ipc6.opt = NULL;
+ }
memset(&fl6, 0, sizeof(fl6));
@@ -140,7 +150,8 @@ static int ping_v6_sendmsg(struct sock *sk, struct msghdr *msg, size_t len)
pfh.wcheck = 0;
pfh.family = AF_INET6;
- ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
+ if (ipc6.hlimit < 0)
+ ipc6.hlimit = ip6_sk_dst_hoplimit(np, &fl6, dst);
lock_sock(sk);
err = ip6_append_data(sk, ping_getfrag, &pfh, len,
--
2.34.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH net-next 2/5] selftests: net: test IPV6_DONTFRAG
2022-02-17 1:21 [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 1/5] " Jakub Kicinski
@ 2022-02-17 1:21 ` Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 3/5] selftests: net: test IPV6_TCLASS Jakub Kicinski
` (3 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Jakub Kicinski @ 2022-02-17 1:21 UTC (permalink / raw)
To: davem
Cc: netdev, willemb, lorenzo, maze, dsahern, yoshfuji, shuah,
linux-kselftest, Jakub Kicinski
Test setting IPV6_DONTFRAG via setsockopt and cmsg
across socket types.
Output without the kernel support (this series):
Case DONTFRAG ICMP setsock returned 0, expected 1
Case DONTFRAG ICMP cmsg returned 0, expected 1
Case DONTFRAG ICMP both returned 0, expected 1
Case DONTFRAG ICMP diff returned 0, expected 1
FAIL - 4/24 cases failed
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
tools/testing/selftests/net/cmsg_ipv6.sh | 65 ++++++++++++++
tools/testing/selftests/net/cmsg_sender.c | 105 +++++++++++++++++-----
2 files changed, 147 insertions(+), 23 deletions(-)
create mode 100755 tools/testing/selftests/net/cmsg_ipv6.sh
diff --git a/tools/testing/selftests/net/cmsg_ipv6.sh b/tools/testing/selftests/net/cmsg_ipv6.sh
new file mode 100755
index 000000000000..fb5a8ab7c909
--- /dev/null
+++ b/tools/testing/selftests/net/cmsg_ipv6.sh
@@ -0,0 +1,65 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0
+
+NS=ns
+IP6=2001:db8:1::1/64
+TGT6=2001:db8:1::2
+
+cleanup()
+{
+ ip netns del $NS
+}
+
+trap cleanup EXIT
+
+NSEXE="ip netns exec $NS"
+
+# Namespaces
+ip netns add $NS
+
+$NSEXE sysctl -w net.ipv4.ping_group_range='0 2147483647' > /dev/null
+
+# Connectivity
+ip -netns $NS link add type dummy
+ip -netns $NS link set dev dummy0 up
+ip -netns $NS addr add $IP6 dev dummy0
+
+# Test
+BAD=0
+TOTAL=0
+
+check_result() {
+ ((TOTAL++))
+ if [ $1 -ne $2 ]; then
+ echo " Case $3 returned $1, expected $2"
+ ((BAD++))
+ fi
+}
+
+# IPV6_DONTFRAG
+for ovr in setsock cmsg both diff; do
+ for df in 0 1; do
+ for p in u i r; do
+ [ $p == "u" ] && prot=UDP
+ [ $p == "i" ] && prot=ICMP
+ [ $p == "r" ] && prot=RAW
+
+ [ $ovr == "setsock" ] && m="-F $df"
+ [ $ovr == "cmsg" ] && m="-f $df"
+ [ $ovr == "both" ] && m="-F $df -f $df"
+ [ $ovr == "diff" ] && m="-F $((1 - df)) -f $df"
+
+ $NSEXE ./cmsg_sender -s -S 2000 -6 -p $p $m $TGT6 1234
+ check_result $? $df "DONTFRAG $prot $ovr"
+ done
+ done
+done
+
+# Summary
+if [ $BAD -ne 0 ]; then
+ echo "FAIL - $BAD/$TOTAL cases failed"
+ exit 1
+else
+ echo "OK"
+ exit 0
+fi
diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c
index efa617bd34e2..844ca6134662 100644
--- a/tools/testing/selftests/net/cmsg_sender.c
+++ b/tools/testing/selftests/net/cmsg_sender.c
@@ -33,22 +33,26 @@ enum {
ERN_CMSG_RCV,
};
+struct option_cmsg_u32 {
+ bool ena;
+ unsigned int val;
+};
+
struct options {
bool silent_send;
const char *host;
const char *service;
+ unsigned int size;
struct {
unsigned int mark;
+ unsigned int dontfrag;
} sockopt;
struct {
unsigned int family;
unsigned int type;
unsigned int proto;
} sock;
- struct {
- bool ena;
- unsigned int val;
- } mark;
+ struct option_cmsg_u32 mark;
struct {
bool ena;
unsigned int delay;
@@ -56,7 +60,11 @@ struct options {
struct {
bool ena;
} ts;
+ struct {
+ struct option_cmsg_u32 dontfrag;
+ } v6;
} opt = {
+ .size = 13,
.sock = {
.family = AF_UNSPEC,
.type = SOCK_DGRAM,
@@ -72,6 +80,7 @@ static void __attribute__((noreturn)) cs_usage(const char *bin)
printf("Usage: %s [opts] <dst host> <dst port / service>\n", bin);
printf("Options:\n"
"\t\t-s Silent send() failures\n"
+ "\t\t-S send() size\n"
"\t\t-4/-6 Force IPv4 / IPv6 only\n"
"\t\t-p prot Socket protocol\n"
"\t\t (u = UDP (default); i = ICMP; r = RAW)\n"
@@ -80,6 +89,8 @@ static void __attribute__((noreturn)) cs_usage(const char *bin)
"\t\t-M val Set SO_MARK via setsockopt\n"
"\t\t-d val Set SO_TXTIME with given delay (usec)\n"
"\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"
"");
exit(ERN_HELP);
}
@@ -88,11 +99,14 @@ static void cs_parse_args(int argc, char *argv[])
{
char o;
- while ((o = getopt(argc, argv, "46sp:m:M:d:t")) != -1) {
+ while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:")) != -1) {
switch (o) {
case 's':
opt.silent_send = true;
break;
+ case 'S':
+ opt.size = atoi(optarg);
+ break;
case '4':
opt.sock.family = AF_INET;
break;
@@ -126,6 +140,13 @@ static void cs_parse_args(int argc, char *argv[])
case 't':
opt.ts.ena = true;
break;
+ case 'f':
+ opt.v6.dontfrag.ena = true;
+ opt.v6.dontfrag.val = atoi(optarg);
+ break;
+ case 'F':
+ opt.sockopt.dontfrag = atoi(optarg);
+ break;
}
}
@@ -136,6 +157,38 @@ static void cs_parse_args(int argc, char *argv[])
opt.service = argv[optind + 1];
}
+static void memrnd(void *s, size_t n)
+{
+ int *dword = s;
+ char *byte;
+
+ for (; n >= 4; n -= 4)
+ *dword++ = rand();
+ byte = (void *)dword;
+ while (n--)
+ *byte++ = rand();
+}
+
+static void
+ca_write_cmsg_u32(char *cbuf, size_t cbuf_sz, size_t *cmsg_len,
+ int level, int optname, struct option_cmsg_u32 *uopt)
+{
+ struct cmsghdr *cmsg;
+
+ if (!uopt->ena)
+ return;
+
+ cmsg = (struct cmsghdr *)(cbuf + *cmsg_len);
+ *cmsg_len += CMSG_SPACE(sizeof(__u32));
+ if (cbuf_sz < *cmsg_len)
+ error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small");
+
+ cmsg->cmsg_level = level;
+ cmsg->cmsg_type = optname;
+ cmsg->cmsg_len = CMSG_LEN(sizeof(__u32));
+ *(__u32 *)CMSG_DATA(cmsg) = uopt->val;
+}
+
static void
cs_write_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
{
@@ -145,17 +198,11 @@ cs_write_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
msg->msg_control = cbuf;
cmsg_len = 0;
- if (opt.mark.ena) {
- cmsg = (struct cmsghdr *)(cbuf + cmsg_len);
- cmsg_len += CMSG_SPACE(sizeof(__u32));
- if (cbuf_sz < cmsg_len)
- error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small");
+ ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
+ SOL_SOCKET, SO_MARK, &opt.mark);
+ ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
+ SOL_IPV6, IPV6_DONTFRAG, &opt.v6.dontfrag);
- cmsg->cmsg_level = SOL_SOCKET;
- cmsg->cmsg_type = SO_MARK;
- cmsg->cmsg_len = CMSG_LEN(sizeof(__u32));
- *(__u32 *)CMSG_DATA(cmsg) = opt.mark.val;
- }
if (opt.txtime.ena) {
struct sock_txtime so_txtime = {
.clockid = CLOCK_MONOTONIC,
@@ -286,18 +333,33 @@ cs_read_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
}
}
+static void ca_set_sockopts(int fd)
+{
+ if (opt.sockopt.mark &&
+ setsockopt(fd, SOL_SOCKET, SO_MARK,
+ &opt.sockopt.mark, sizeof(opt.sockopt.mark)))
+ error(ERN_SOCKOPT, errno, "setsockopt SO_MARK");
+ if (opt.sockopt.dontfrag &&
+ setsockopt(fd, SOL_IPV6, IPV6_DONTFRAG,
+ &opt.sockopt.dontfrag, sizeof(opt.sockopt.dontfrag)))
+ error(ERN_SOCKOPT, errno, "setsockopt IPV6_DONTFRAG");
+}
+
int main(int argc, char *argv[])
{
- char buf[] = "blablablabla";
struct addrinfo hints, *ai;
struct iovec iov[1];
struct msghdr msg;
char cbuf[1024];
+ char *buf;
int err;
int fd;
cs_parse_args(argc, argv);
+ buf = malloc(opt.size);
+ memrnd(buf, opt.size);
+
memset(&hints, 0, sizeof(hints));
hints.ai_family = opt.sock.family;
@@ -326,17 +388,14 @@ int main(int argc, char *argv[])
buf[0] = ICMPV6_ECHO_REQUEST;
buf[1] = 0;
} else if (opt.sock.type == SOCK_RAW) {
- struct udphdr hdr = { 1, 2, htons(sizeof(buf)), 0 };
+ struct udphdr hdr = { 1, 2, htons(opt.size), 0 };
struct sockaddr_in6 *sin6 = (void *)ai->ai_addr;;
memcpy(buf, &hdr, sizeof(hdr));
sin6->sin6_port = htons(opt.sock.proto);
}
- if (opt.sockopt.mark &&
- setsockopt(fd, SOL_SOCKET, SO_MARK,
- &opt.sockopt.mark, sizeof(opt.sockopt.mark)))
- error(ERN_SOCKOPT, errno, "setsockopt SO_MARK");
+ ca_set_sockopts(fd);
if (clock_gettime(CLOCK_REALTIME, &time_start_real))
error(ERN_GETTIME, errno, "gettime REALTIME");
@@ -344,7 +403,7 @@ int main(int argc, char *argv[])
error(ERN_GETTIME, errno, "gettime MONOTONIC");
iov[0].iov_base = buf;
- iov[0].iov_len = sizeof(buf);
+ iov[0].iov_len = opt.size;
memset(&msg, 0, sizeof(msg));
msg.msg_name = ai->ai_addr;
@@ -360,7 +419,7 @@ int main(int argc, char *argv[])
fprintf(stderr, "send failed: %s\n", strerror(errno));
err = ERN_SEND;
goto err_out;
- } else if (err != sizeof(buf)) {
+ } else if (err != (int)opt.size) {
fprintf(stderr, "short send\n");
err = ERN_SEND_SHORT;
goto err_out;
--
2.34.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH net-next 3/5] selftests: net: test IPV6_TCLASS
2022-02-17 1:21 [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 1/5] " Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 2/5] selftests: net: test IPV6_DONTFRAG Jakub Kicinski
@ 2022-02-17 1:21 ` Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 4/5] selftests: net: test IPV6_HOPLIMIT Jakub Kicinski
` (2 subsequent siblings)
5 siblings, 0 replies; 7+ messages in thread
From: Jakub Kicinski @ 2022-02-17 1:21 UTC (permalink / raw)
To: davem
Cc: netdev, willemb, lorenzo, maze, dsahern, yoshfuji, shuah,
linux-kselftest, Jakub Kicinski
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>
---
tools/testing/selftests/net/cmsg_ipv6.sh | 51 +++++++++++++++++++++++
tools/testing/selftests/net/cmsg_sender.c | 19 ++++++++-
2 files changed, 69 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/cmsg_ipv6.sh b/tools/testing/selftests/net/cmsg_ipv6.sh
index fb5a8ab7c909..f7bb6ce68c88 100755
--- a/tools/testing/selftests/net/cmsg_ipv6.sh
+++ b/tools/testing/selftests/net/cmsg_ipv6.sh
@@ -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"
diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c
index 844ca6134662..4033cf93eabf 100644
--- a/tools/testing/selftests/net/cmsg_sender.c
+++ b/tools/testing/selftests/net/cmsg_sender.c
@@ -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[])
--
2.34.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH net-next 4/5] selftests: net: test IPV6_HOPLIMIT
2022-02-17 1:21 [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg Jakub Kicinski
` (2 preceding siblings ...)
2022-02-17 1:21 ` [PATCH net-next 3/5] selftests: net: test IPV6_TCLASS Jakub Kicinski
@ 2022-02-17 1:21 ` Jakub Kicinski
2022-02-17 1:21 ` [PATCH net-next 5/5] selftests: net: basic test for IPV6_2292* Jakub Kicinski
2022-02-17 14:30 ` [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg patchwork-bot+netdevbpf
5 siblings, 0 replies; 7+ messages in thread
From: Jakub Kicinski @ 2022-02-17 1:21 UTC (permalink / raw)
To: davem
Cc: netdev, willemb, lorenzo, maze, dsahern, yoshfuji, shuah,
linux-kselftest, Jakub Kicinski
Test setting IPV6_HOPLIMIT via setsockopt and cmsg
across socket types.
Output without the kernel support (this series):
Case HOPLIMIT ICMP cmsg - packet data returned 1, expected 0
Case HOPLIMIT ICMP diff - packet data returned 1, expected 0
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
tools/testing/selftests/net/cmsg_ipv6.sh | 31 +++++++++++++++++++++++
tools/testing/selftests/net/cmsg_sender.c | 19 +++++++++++++-
2 files changed, 49 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/cmsg_ipv6.sh b/tools/testing/selftests/net/cmsg_ipv6.sh
index f7bb6ce68c88..e42c36e0d741 100755
--- a/tools/testing/selftests/net/cmsg_ipv6.sh
+++ b/tools/testing/selftests/net/cmsg_ipv6.sh
@@ -106,6 +106,37 @@ for ovr in setsock cmsg both diff; do
done
done
+# IPV6_HOPLIMIT
+LIM=4
+
+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="-L"
+ [ $ovr == "cmsg" ] && m="-l"
+ [ $ovr == "both" ] && m="-L $LIM -l"
+ [ $ovr == "diff" ] && m="-L $((LIM + 1)) -l"
+
+ $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 $LIM $TGT6 1234
+ check_result $? 0 "HOPLIMIT $prot $ovr - pass"
+
+ while [ -d /proc/$BG ]; do
+ $NSEXE ./cmsg_sender -6 -p u $TGT6 1234
+ done
+
+ tcpdump -r $TMPF -v 2>&1 | grep "hlim $LIM[^0-9]" >> /dev/null
+ check_result $? 0 "HOPLIMIT $prot $ovr - packet data"
+ rm $TMPF
+ done
+done
+
# Summary
if [ $BAD -ne 0 ]; then
echo "FAIL - $BAD/$TOTAL cases failed"
diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c
index 4033cf93eabf..6136aa7df1c4 100644
--- a/tools/testing/selftests/net/cmsg_sender.c
+++ b/tools/testing/selftests/net/cmsg_sender.c
@@ -47,6 +47,7 @@ struct options {
unsigned int mark;
unsigned int dontfrag;
unsigned int tclass;
+ unsigned int hlimit;
} sockopt;
struct {
unsigned int family;
@@ -64,6 +65,7 @@ struct options {
struct {
struct option_cmsg_u32 dontfrag;
struct option_cmsg_u32 tclass;
+ struct option_cmsg_u32 hlimit;
} v6;
} opt = {
.size = 13,
@@ -95,6 +97,8 @@ static void __attribute__((noreturn)) cs_usage(const char *bin)
"\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"
+ "\t\t-l val Set HOPLIMIT via cmsg\n"
+ "\t\t-L val Set HOPLIMIT via setsockopt\n"
"");
exit(ERN_HELP);
}
@@ -103,7 +107,7 @@ static void cs_parse_args(int argc, char *argv[])
{
char o;
- while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:")) != -1) {
+ while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:l:L:")) != -1) {
switch (o) {
case 's':
opt.silent_send = true;
@@ -158,6 +162,13 @@ static void cs_parse_args(int argc, char *argv[])
case 'C':
opt.sockopt.tclass = atoi(optarg);
break;
+ case 'l':
+ opt.v6.hlimit.ena = true;
+ opt.v6.hlimit.val = atoi(optarg);
+ break;
+ case 'L':
+ opt.sockopt.hlimit = atoi(optarg);
+ break;
}
}
@@ -215,6 +226,8 @@ cs_write_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
SOL_IPV6, IPV6_DONTFRAG, &opt.v6.dontfrag);
ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
SOL_IPV6, IPV6_TCLASS, &opt.v6.tclass);
+ ca_write_cmsg_u32(cbuf, cbuf_sz, &cmsg_len,
+ SOL_IPV6, IPV6_HOPLIMIT, &opt.v6.hlimit);
if (opt.txtime.ena) {
struct sock_txtime so_txtime = {
@@ -360,6 +373,10 @@ static void ca_set_sockopts(int fd)
setsockopt(fd, SOL_IPV6, IPV6_TCLASS,
&opt.sockopt.tclass, sizeof(opt.sockopt.tclass)))
error(ERN_SOCKOPT, errno, "setsockopt IPV6_TCLASS");
+ if (opt.sockopt.hlimit &&
+ setsockopt(fd, SOL_IPV6, IPV6_UNICAST_HOPS,
+ &opt.sockopt.hlimit, sizeof(opt.sockopt.hlimit)))
+ error(ERN_SOCKOPT, errno, "setsockopt IPV6_HOPLIMIT");
}
int main(int argc, char *argv[])
--
2.34.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* [PATCH net-next 5/5] selftests: net: basic test for IPV6_2292*
2022-02-17 1:21 [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg Jakub Kicinski
` (3 preceding siblings ...)
2022-02-17 1:21 ` [PATCH net-next 4/5] selftests: net: test IPV6_HOPLIMIT Jakub Kicinski
@ 2022-02-17 1:21 ` Jakub Kicinski
2022-02-17 14:30 ` [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg patchwork-bot+netdevbpf
5 siblings, 0 replies; 7+ messages in thread
From: Jakub Kicinski @ 2022-02-17 1:21 UTC (permalink / raw)
To: davem
Cc: netdev, willemb, lorenzo, maze, dsahern, yoshfuji, shuah,
linux-kselftest, Jakub Kicinski
Add a basic test to make sure ping sockets don't crash
with IPV6_2292* options.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
tools/testing/selftests/net/cmsg_ipv6.sh | 9 +++++++
tools/testing/selftests/net/cmsg_sender.c | 33 ++++++++++++++++++++++-
2 files changed, 41 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/net/cmsg_ipv6.sh b/tools/testing/selftests/net/cmsg_ipv6.sh
index e42c36e0d741..2d89cb0ad288 100755
--- a/tools/testing/selftests/net/cmsg_ipv6.sh
+++ b/tools/testing/selftests/net/cmsg_ipv6.sh
@@ -137,6 +137,15 @@ for ovr in setsock cmsg both diff; do
done
done
+# IPV6 exthdr
+for p in u i r; do
+ # Very basic "does it crash" test
+ for h in h d r; do
+ $NSEXE ./cmsg_sender -p $p -6 -H $h $TGT6 1234
+ check_result $? 0 "ExtHdr $prot $ovr - pass"
+ done
+done
+
# Summary
if [ $BAD -ne 0 ]; then
echo "FAIL - $BAD/$TOTAL cases failed"
diff --git a/tools/testing/selftests/net/cmsg_sender.c b/tools/testing/selftests/net/cmsg_sender.c
index 6136aa7df1c4..aed7845c08a8 100644
--- a/tools/testing/selftests/net/cmsg_sender.c
+++ b/tools/testing/selftests/net/cmsg_sender.c
@@ -66,6 +66,7 @@ struct options {
struct option_cmsg_u32 dontfrag;
struct option_cmsg_u32 tclass;
struct option_cmsg_u32 hlimit;
+ struct option_cmsg_u32 exthdr;
} v6;
} opt = {
.size = 13,
@@ -99,6 +100,8 @@ static void __attribute__((noreturn)) cs_usage(const char *bin)
"\t\t-C val Set TCLASS via setsockopt\n"
"\t\t-l val Set HOPLIMIT via cmsg\n"
"\t\t-L val Set HOPLIMIT via setsockopt\n"
+ "\t\t-H type Add an IPv6 header option\n"
+ "\t\t (h = HOP; d = DST; r = RTDST)"
"");
exit(ERN_HELP);
}
@@ -107,7 +110,7 @@ static void cs_parse_args(int argc, char *argv[])
{
char o;
- while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:l:L:")) != -1) {
+ while ((o = getopt(argc, argv, "46sS:p:m:M:d:tf:F:c:C:l:L:H:")) != -1) {
switch (o) {
case 's':
opt.silent_send = true;
@@ -169,6 +172,23 @@ static void cs_parse_args(int argc, char *argv[])
case 'L':
opt.sockopt.hlimit = atoi(optarg);
break;
+ case 'H':
+ opt.v6.exthdr.ena = true;
+ switch (optarg[0]) {
+ case 'h':
+ opt.v6.exthdr.val = IPV6_HOPOPTS;
+ break;
+ case 'd':
+ opt.v6.exthdr.val = IPV6_DSTOPTS;
+ break;
+ case 'r':
+ opt.v6.exthdr.val = IPV6_RTHDRDSTOPTS;
+ break;
+ default:
+ printf("Error: hdr type: %s\n", optarg);
+ break;
+ }
+ break;
}
}
@@ -272,6 +292,17 @@ cs_write_cmsg(int fd, struct msghdr *msg, char *cbuf, size_t cbuf_sz)
*(__u32 *)CMSG_DATA(cmsg) = SOF_TIMESTAMPING_TX_SCHED |
SOF_TIMESTAMPING_TX_SOFTWARE;
}
+ if (opt.v6.exthdr.ena) {
+ cmsg = (struct cmsghdr *)(cbuf + cmsg_len);
+ cmsg_len += CMSG_SPACE(8);
+ if (cbuf_sz < cmsg_len)
+ error(ERN_CMSG_WR, EFAULT, "cmsg buffer too small");
+
+ cmsg->cmsg_level = SOL_IPV6;
+ cmsg->cmsg_type = opt.v6.exthdr.val;
+ cmsg->cmsg_len = CMSG_LEN(8);
+ *(__u64 *)CMSG_DATA(cmsg) = 0;
+ }
if (cmsg_len)
msg->msg_controllen = cmsg_len;
--
2.34.1
^ permalink raw reply related [flat|nested] 7+ messages in thread
* Re: [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg
2022-02-17 1:21 [PATCH net-next 0/5] net: ping6: support setting basic SOL_IPV6 options via cmsg Jakub Kicinski
` (4 preceding siblings ...)
2022-02-17 1:21 ` [PATCH net-next 5/5] selftests: net: basic test for IPV6_2292* Jakub Kicinski
@ 2022-02-17 14:30 ` patchwork-bot+netdevbpf
5 siblings, 0 replies; 7+ messages in thread
From: patchwork-bot+netdevbpf @ 2022-02-17 14:30 UTC (permalink / raw)
To: Jakub Kicinski
Cc: davem, netdev, willemb, lorenzo, maze, dsahern, yoshfuji, shuah,
linux-kselftest
Hello:
This series was applied to netdev/net-next.git (master)
by David S. Miller <davem@davemloft.net>:
On Wed, 16 Feb 2022 17:21:15 -0800 you wrote:
> Support for IPV6_HOPLIMIT, IPV6_TCLASS, IPV6_DONTFRAG on ICMPv6
> sockets and associated tests. I have no immediate plans to
> implement IPV6_FLOWINFO and all the extension header stuff.
>
> Jakub Kicinski (5):
> net: ping6: support setting basic SOL_IPV6 options via cmsg
> selftests: net: test IPV6_DONTFRAG
> selftests: net: test IPV6_TCLASS
> selftests: net: test IPV6_HOPLIMIT
> selftests: net: basic test for IPV6_2292*
>
> [...]
Here is the summary with links:
- [net-next,1/5] net: ping6: support setting basic SOL_IPV6 options via cmsg
https://git.kernel.org/netdev/net-next/c/13651224c00b
- [net-next,2/5] selftests: net: test IPV6_DONTFRAG
https://git.kernel.org/netdev/net-next/c/6f97c7c605d6
- [net-next,3/5] selftests: net: test IPV6_TCLASS
https://git.kernel.org/netdev/net-next/c/9657ad09e1fa
- [net-next,4/5] selftests: net: test IPV6_HOPLIMIT
https://git.kernel.org/netdev/net-next/c/05ae83d5a4a2
- [net-next,5/5] selftests: net: basic test for IPV6_2292*
https://git.kernel.org/netdev/net-next/c/a22982c39eb1
You are awesome, thank you!
--
Deet-doot-dot, I am a bot.
https://korg.docs.kernel.org/patchwork/pwbot.html
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2022-02-17 14:30 UTC | newest]
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