[PATCH 3/3] examples/l3fwd: fix maximum acceptable port ID in routes

[Gagandeep Singh]

Application is accepting routes for port ID up to UINT8_MAX
for LPM amd EM routes on parsing the given rule file, but only
up to 32 ports can be enabled as per the variable enabled_port_mask
which is defined as uint32_t.

This patch restricts the rules parsing code to accept routes for
port ID up to 31 only to avoid any unnecessary maintenance of rules
which will never be used.

Fixes: e7e6dd643092 ("examples/l3fwd: support config file for EM")
Fixes: 52def963fc1c ("examples/l3fwd: support config file for LPM/FIB")
Cc: sean.morris...@intel.com
Cc: sta...@dpdk.org

Signed-off-by: Gagandeep Singh <g.si...@nxp.com>
---
 examples/l3fwd/em_route_parse.c  | 6 ++++--
 examples/l3fwd/lpm_route_parse.c | 6 ++++--
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/examples/l3fwd/em_route_parse.c b/examples/l3fwd/em_route_parse.c
index 8b534de5f1..65c71cd1ba 100644
--- a/examples/l3fwd/em_route_parse.c
+++ b/examples/l3fwd/em_route_parse.c
@@ -65,7 +65,8 @@ em_parse_v6_rule(char *str, struct em_rule *v)
        /* protocol. */
        GET_CB_FIELD(in[CB_FLD_PROTO], v->v6_key.proto, 0, UINT8_MAX, 0);
        /* out interface. */
-       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
+       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
+                       (sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
 
        return 0;
 }
@@ -102,7 +103,8 @@ em_parse_v4_rule(char *str, struct em_rule *v)
        /* protocol. */
        GET_CB_FIELD(in[CB_FLD_PROTO], v->v4_key.proto, 0, UINT8_MAX, 0);
        /* out interface. */
-       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
+       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
+                       (sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
 
        return 0;
 }
diff --git a/examples/l3fwd/lpm_route_parse.c b/examples/l3fwd/lpm_route_parse.c
index f27b66e838..357c12d9fe 100644
--- a/examples/l3fwd/lpm_route_parse.c
+++ b/examples/l3fwd/lpm_route_parse.c
@@ -110,7 +110,8 @@ lpm_parse_v6_rule(char *str, struct lpm_route_rule *v)
 
        rc = lpm_parse_v6_net(in[CB_FLD_DST_ADDR], v->ip_32, &v->depth);
 
-       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
+       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
+                       (sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
 
        return rc;
 }
@@ -132,7 +133,8 @@ lpm_parse_v4_rule(char *str, struct lpm_route_rule *v)
 
        rc = parse_ipv4_addr_mask(in[CB_FLD_DST_ADDR], &v->ip, &v->depth);
 
-       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0, UINT8_MAX, 0);
+       GET_CB_FIELD(in[CB_FLD_IF_OUT], v->if_out, 0,
+                       (sizeof(enabled_port_mask) * CHAR_BIT) - 1, 0);
 
        return rc;
 }
-- 
2.25.1