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Message-ID: <1b3d54c39af185c514a16cbd779b52a9cf9ef2de.1683626501.git.gnault@redhat.com>
Date: Tue, 9 May 2023 14:02:36 +0200
From: Guillaume Nault <gnault@...hat.com>
To: David Miller <davem@...emloft.net>, Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>, Eric Dumazet <edumazet@...gle.com>
Cc: netdev@...r.kernel.org, David Ahern <dsahern@...nel.org>
Subject: [PATCH net-next 1/4] selftests: Add SO_DONTROUTE option to nettest.
Add -G option to nettest. It allows to set the SO_DONTROUTE option to
the created sockets. This will be used by the following patches to test
the SO_DONTROUTE behaviour with TCP and UDP.
Signed-off-by: Guillaume Nault <gnault@...hat.com>
---
tools/testing/selftests/net/nettest.c | 32 +++++++++++++++++++++++++--
1 file changed, 30 insertions(+), 2 deletions(-)
diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
index ee9a72982705..0b5b580e6eba 100644
--- a/tools/testing/selftests/net/nettest.c
+++ b/tools/testing/selftests/net/nettest.c
@@ -76,7 +76,8 @@ struct sock_args {
has_grp:1,
has_expected_laddr:1,
has_expected_raddr:1,
- bind_test_only:1;
+ bind_test_only:1,
+ dontroute:1;
unsigned short port;
@@ -611,6 +612,18 @@ static int set_dsfield(int sd, int version, int dsfield)
return 0;
}
+static int set_dontroute(int sd)
+{
+ unsigned int one = 1;
+
+ if (setsockopt(sd, SOL_SOCKET, SO_DONTROUTE, &one, sizeof(one)) < 0) {
+ log_err_errno("setsockopt(SO_DONTROUTE)");
+ return -1;
+ }
+
+ return 0;
+}
+
static int str_to_uint(const char *str, int min, int max, unsigned int *value)
{
int number;
@@ -1351,6 +1364,9 @@ static int msock_init(struct sock_args *args, int server)
if (set_dsfield(sd, AF_INET, args->dsfield) != 0)
goto out_err;
+ if (args->dontroute && set_dontroute(sd) != 0)
+ goto out_err;
+
if (args->dev && bind_to_device(sd, args->dev) != 0)
goto out_err;
else if (args->use_setsockopt &&
@@ -1482,6 +1498,9 @@ static int lsock_init(struct sock_args *args)
if (set_dsfield(sd, args->version, args->dsfield) != 0)
goto err;
+ if (args->dontroute && set_dontroute(sd) != 0)
+ goto err;
+
if (args->dev && bind_to_device(sd, args->dev) != 0)
goto err;
else if (args->use_setsockopt &&
@@ -1698,6 +1717,9 @@ static int connectsock(void *addr, socklen_t alen, struct sock_args *args)
if (set_dsfield(sd, args->version, args->dsfield) != 0)
goto err;
+ if (args->dontroute && set_dontroute(sd) != 0)
+ goto err;
+
if (args->dev && bind_to_device(sd, args->dev) != 0)
goto err;
else if (args->use_setsockopt &&
@@ -1902,7 +1924,7 @@ static int ipc_parent(int cpid, int fd, struct sock_args *args)
return client_status;
}
-#define GETOPT_STR "sr:l:c:Q:p:t:g:P:DRn:M:X:m:d:I:BN:O:SUCi6xL:0:1:2:3:Fbqf"
+#define GETOPT_STR "sr:l:c:Q:Gp:t:g:P:DRn:M:X:m:d:I:BN:O:SUCi6xL:0:1:2:3:Fbqf"
#define OPT_FORCE_BIND_KEY_IFINDEX 1001
#define OPT_NO_BIND_KEY_IFINDEX 1002
@@ -1935,6 +1957,9 @@ static void print_usage(char *prog)
" -c addr local address to bind to in client mode\n"
" -Q dsfield DS Field value of the socket (the IP_TOS or\n"
" IPV6_TCLASS socket option)\n"
+ " -G don't use gateways: send packets only if\n"
+ " destination is on link (see SO_DONTROUTE in\n"
+ " socket(7))\n"
" -x configure XFRM policy on socket\n"
"\n"
" -d dev bind socket to given device name\n"
@@ -2020,6 +2045,9 @@ int main(int argc, char *argv[])
}
args.dsfield = tmp;
break;
+ case 'G':
+ args.dontroute = 1;
+ break;
case 'p':
if (str_to_uint(optarg, 1, 65535, &tmp) != 0) {
fprintf(stderr, "Invalid port\n");
--
2.30.2
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