[PATCH 15/19] selftests: Initial tcp_authopt support for nettest

Leonard Crestez
2021-09-21T16:17:30Z

Add support for configuring TCP Authentication Option. Only a single key
with default options.

Signed-off-by: Leonard Crestez <cdleonard@gmail.com>
---
tools/testing/selftests/net/nettest.c | 34 ++++++++++++++++++++++++++-
1 file changed, 33 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/net/nettest.c b/tools/testing/selftests/net/nettest.c
index bd6288302094..f04c6af79129 100644
--- a/tools/testing/selftests/net/nettest.c
+++ b/tools/testing/selftests/net/nettest.c
@@ -100,10 +100,12 @@ struct sock_args {
struct sockaddr_in v4;
struct sockaddr_in6 v6;
} md5_prefix;
unsigned int prefix_len;

+ const char *authopt_password;
+
/* expected addresses and device index for connection */
const char *expected_dev;
const char *expected_server_dev;
int expected_ifindex;

@@ -250,10 +252,27 @@ static int switch_ns(const char *ns)
close(fd);

return ret;
}

+static int tcp_set_authopt(int sd, struct sock_args *args)
+{
+ struct tcp_authopt_key key;
+ int rc;
+
+ memset(&key, 0, sizeof(key));
+ strcpy((char *)key.key, args->authopt_password);
+ key.keylen = strlen(args->authopt_password);
+ key.alg = TCP_AUTHOPT_ALG_HMAC_SHA_1_96;
+
+ rc = setsockopt(sd, IPPROTO_TCP, TCP_AUTHOPT_KEY, &key, sizeof(key));
+ if (rc < 0)
+ log_err_errno("setsockopt(TCP_AUTHOPT_KEY)");
+
+ return rc;
+}
+
static int tcp_md5sig(int sd, void *addr, socklen_t alen, struct sock_args *args)
{
int keylen = strlen(args->password);
struct tcp_md5sig md5sig = {};
int opt = TCP_MD5SIG;
@@ -1508,10 +1527,15 @@ static int do_server(struct sock_args *args, int ipc_fd)
if (args->password && tcp_md5_remote(lsd, args)) {
close(lsd);
goto err_exit;
}

+ if (args->authopt_password && tcp_set_authopt(lsd, args)) {
+ close(lsd);
+ goto err_exit;
+ }
+
ipc_write(ipc_fd, 1);
while (1) {
log_msg("waiting for client connection.\n");
FD_ZERO(&rfds);
FD_SET(lsd, &rfds);
@@ -1630,10 +1654,13 @@ static int connectsock(void *addr, socklen_t alen, struct sock_args *args)
goto out;

if (args->password && tcp_md5sig(sd, addr, alen, args))
goto err;

+ if (args->authopt_password && tcp_set_authopt(sd, args))
+ goto err;
+
if (args->bind_test_only)
goto out;

if (connect(sd, addr, alen) < 0) {
if (errno != EINPROGRESS) {
@@ -1819,11 +1846,11 @@ static int ipc_parent(int cpid, int fd, struct sock_args *args)

wait(&status);
return client_status;
}

-#define GETOPT_STR "sr:l:c:p:t:g:P:DRn:M:X:m:d:I:BN:O:SCi6xL:0:1:2:3:Fbq"
+#define GETOPT_STR "sr:l:c:p:t:g:P:DRn:M:X:m:A:d:I:BN:O:SCi6xL:0:1:2:3:Fbq"

static void print_usage(char *prog)
{
printf(
"usage: %s OPTS\n"
@@ -1856,10 +1883,12 @@ static void print_usage(char *prog)
" -n num number of times to send message\n"
"\n"
" -M password use MD5 sum protection\n"
" -X password MD5 password for client mode\n"
" -m prefix/len prefix and length to use for MD5 key\n"
+ " -A password use RFC5925 TCP Authentication option\n"
+ "\n"
" -g grp multicast group (e.g., 239.1.1.1)\n"
" -i interactive mode (default is echo and terminate)\n"
"\n"
" -0 addr Expected local address\n"
" -1 addr Expected remote address\n"
@@ -1970,10 +1999,13 @@ int main(int argc, char *argv[])
args.client_pw = optarg;
break;
case 'm':
args.md5_prefix_str = optarg;
break;
+ case 'A':
+ args.authopt_password = optarg;
+ break;
case 'S':
args.use_setsockopt = 1;
break;
case 'C':
args.use_cmsg = 1;
--
2.25.1