selftests: mptcp: add tproxy test case

No hard dependencies here, just skip if test environ lacks
nft binary or the needed kernel config options.

The test case spawns listener in ns2 but ns1 will connect
to the ip address of ns4.

policy routing + tproxy rule will redirect packets to ns2 instead
of forward.

v3: - update mptcp/config (Mat Martineau)
    - more verbose SKIP messages in mptcp_connect.sh

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/tools/testing/selftests/net/mptcp/config b/tools/testing/selftests/net/mptcp/config
index 0faaccd21447e4a0458201f8a9d7ab2921a25656..419e71560fd1533706aa8f3cf8e792ae828645e0 100644 (file)
--- a/tools/testing/selftests/net/mptcp/config
+++ b/tools/testing/selftests/net/mptcp/config
@@ -13,5 +13,9 @@ CONFIG_NFT_COUNTER=m
 CONFIG_NFT_COMPAT=m
 CONFIG_NETFILTER_XTABLES=m
 CONFIG_NETFILTER_XT_MATCH_BPF=m
-CONFIG_NF_TABLES_IPV4=y
-CONFIG_NF_TABLES_IPV6=y
+CONFIG_NF_TABLES_INET=y
+CONFIG_NFT_TPROXY=m
+CONFIG_NFT_SOCKET=m
+CONFIG_IP_ADVANCED_ROUTER=y
+CONFIG_IP_MULTIPLE_TABLES=y
+CONFIG_IPV6_MULTIPLE_TABLES=y

diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.c b/tools/testing/selftests/net/mptcp/mptcp_connect.c
index 95e81d557b0887c8e38ec4b6128a4c09aa460889..ada9b80774d439663931c389acc0abb7dbb3dfcf 100644 (file)
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.c
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.c
@@ -75,7 +75,12 @@ struct cfg_cmsg_types {
        unsigned int timestampns:1;
 };
 
+struct cfg_sockopt_types {
+       unsigned int transparent:1;
+};
+
 static struct cfg_cmsg_types cfg_cmsg_types;
+static struct cfg_sockopt_types cfg_sockopt_types;
 
 static void die_usage(void)
 {
@@ -93,6 +98,7 @@ static void die_usage(void)
        fprintf(stderr, "\t-u -- check mptcp ulp\n");
        fprintf(stderr, "\t-w num -- wait num sec before closing the socket\n");
        fprintf(stderr, "\t-c cmsg -- test cmsg type <cmsg>\n");
+       fprintf(stderr, "\t-o option -- test sockopt <option>\n");
        fprintf(stderr,
                "\t-P [saveWithPeek|saveAfterPeek] -- save data with/after MSG_PEEK form tcp socket\n");
        exit(1);
@@ -185,6 +191,22 @@ static void set_mark(int fd, uint32_t mark)
        }
 }
 
+static void set_transparent(int fd, int pf)
+{
+       int one = 1;
+
+       switch (pf) {
+       case AF_INET:
+               if (-1 == setsockopt(fd, SOL_IP, IP_TRANSPARENT, &one, sizeof(one)))
+                       perror("IP_TRANSPARENT");
+               break;
+       case AF_INET6:
+               if (-1 == setsockopt(fd, IPPROTO_IPV6, IPV6_TRANSPARENT, &one, sizeof(one)))
+                       perror("IPV6_TRANSPARENT");
+               break;
+       }
+}
+
 static int sock_listen_mptcp(const char * const listenaddr,
                             const char * const port)
 {
@@ -212,6 +234,9 @@ static int sock_listen_mptcp(const char * const listenaddr,
                                     sizeof(one)))
                        perror("setsockopt");
 
+               if (cfg_sockopt_types.transparent)
+                       set_transparent(sock, pf);
+
                if (bind(sock, a->ai_addr, a->ai_addrlen) == 0)
                        break; /* success */
 
@@ -944,6 +969,27 @@ static void parse_cmsg_types(const char *type)
        exit(1);
 }
 
+static void parse_setsock_options(const char *name)
+{
+       char *next = strchr(name, ',');
+       unsigned int len = 0;
+
+       if (next) {
+               parse_setsock_options(next + 1);
+               len = next - name;
+       } else {
+               len = strlen(name);
+       }
+
+       if (strncmp(name, "TRANSPARENT", len) == 0) {
+               cfg_sockopt_types.transparent = 1;
+               return;
+       }
+
+       fprintf(stderr, "Unrecognized setsockopt option %s\n", name);
+       exit(1);
+}
+
 int main_loop(void)
 {
        int fd;
@@ -1047,7 +1093,7 @@ static void parse_opts(int argc, char **argv)
 {
        int c;
 
-       while ((c = getopt(argc, argv, "6jr:lp:s:hut:T:m:S:R:w:M:P:c:")) != -1) {
+       while ((c = getopt(argc, argv, "6jr:lp:s:hut:T:m:S:R:w:M:P:c:o:")) != -1) {
                switch (c) {
                case 'j':
                        cfg_join = true;
@@ -1108,6 +1154,9 @@ static void parse_opts(int argc, char **argv)
                case 'c':
                        parse_cmsg_types(optarg);
                        break;
+               case 'o':
+                       parse_setsock_options(optarg);
+                       break;
                }
        }
 

diff --git a/tools/testing/selftests/net/mptcp/mptcp_connect.sh b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
index 559173a8e387b8a0f9eef3392560e43c1844fe0c..a4226b608c68d17caae635e4ad8b651193049f4f 100755 (executable)
--- a/tools/testing/selftests/net/mptcp/mptcp_connect.sh
+++ b/tools/testing/selftests/net/mptcp/mptcp_connect.sh
@@ -671,6 +671,82 @@ run_tests()
        run_tests_lo $1 $2 $3 0
 }
 
+run_test_transparent()
+{
+       local connect_addr="$1"
+       local msg="$2"
+
+       local connector_ns="$ns1"
+       local listener_ns="$ns2"
+       local lret=0
+       local r6flag=""
+
+       # skip if we don't want v6
+       if ! $ipv6 && is_v6 "${connect_addr}"; then
+               return 0
+       fi
+
+ip netns exec "$listener_ns" nft -f /dev/stdin <<"EOF"
+flush ruleset
+table inet mangle {
+       chain divert {
+               type filter hook prerouting priority -150;
+
+               meta l4proto tcp socket transparent 1 meta mark set 1 accept
+               tcp dport 20000 tproxy to :20000 meta mark set 1 accept
+       }
+}
+EOF
+       if [ $? -ne 0 ]; then
+               echo "SKIP: $msg, could not load nft ruleset"
+               return
+       fi
+
+       local local_addr
+       if is_v6 "${connect_addr}"; then
+               local_addr="::"
+               r6flag="-6"
+       else
+               local_addr="0.0.0.0"
+       fi
+
+       ip -net "$listener_ns" $r6flag rule add fwmark 1 lookup 100
+       if [ $? -ne 0 ]; then
+               ip netns exec "$listener_ns" nft flush ruleset
+               echo "SKIP: $msg, ip $r6flag rule failed"
+               return
+       fi
+
+       ip -net "$listener_ns" route add local $local_addr/0 dev lo table 100
+       if [ $? -ne 0 ]; then
+               ip netns exec "$listener_ns" nft flush ruleset
+               ip -net "$listener_ns" $r6flag rule del fwmark 1 lookup 100
+               echo "SKIP: $msg, ip route add local $local_addr failed"
+               return
+       fi
+
+       echo "INFO: test $msg"
+
+       TEST_COUNT=10000
+       local extra_args="-o TRANSPARENT"
+       do_transfer ${listener_ns} ${connector_ns} MPTCP MPTCP \
+                   ${connect_addr} ${local_addr} "${extra_args}"
+       lret=$?
+
+       ip netns exec "$listener_ns" nft flush ruleset
+       ip -net "$listener_ns" $r6flag rule del fwmark 1 lookup 100
+       ip -net "$listener_ns" route del local $local_addr/0 dev lo table 100
+
+       if [ $lret -ne 0 ]; then
+               echo "FAIL: $msg, mptcp connection error" 1>&2
+               ret=$lret
+               return 1
+       fi
+
+       echo "PASS: $msg"
+       return 0
+}
+
 run_tests_peekmode()
 {
        local peekmode="$1"
@@ -794,5 +870,9 @@ run_tests_peekmode "saveWithPeek"
 run_tests_peekmode "saveAfterPeek"
 stop_if_error "Tests with peek mode have failed"
 
+# connect to ns4 ip address, ns2 should intercept/proxy
+run_test_transparent 10.0.3.1 "tproxy ipv4"
+run_test_transparent dead:beef:3::1 "tproxy ipv6"
+
 display_time
 exit $ret