kvargs: be strict when matching a key

When we match a key in is_valid_key() and rte_kvargs_process(), do a
strict comparison (strcmp()) instead of using strstr(s1, s2) which tries
a find s1 in s2. This old behavior could lead to unexpected match, for
instance "cola" match "chocolate".

Surprisingly, no patch was needed on rte_kvargs_count() as it already
used strcmp().

Signed-off-by: Olivier Matz <olivier.matz@6wind.com>
Acked-by: Bruce Richardson <bruce.richardson@intel.com>

diff --git a/lib/librte_kvargs/rte_kvargs.c b/lib/librte_kvargs/rte_kvargs.c
index 1291084..c7f626f 100644 (file)
--- a/lib/librte_kvargs/rte_kvargs.c
+++ b/lib/librte_kvargs/rte_kvargs.c
@@ -94,9 +94,10 @@ is_valid_key(const char *valid[], const char *key_match)
 {
        const char **valid_ptr;
 
-       for (valid_ptr = valid; *valid_ptr != NULL; valid_ptr++)
-               if (strstr(key_match, *valid_ptr) != NULL)
+       for (valid_ptr = valid; *valid_ptr != NULL; valid_ptr++) {
+               if (strcmp(key_match, *valid_ptr) == 0)
                        return 1;
+       }
        return 0;
 }
 
@@ -159,7 +160,7 @@ rte_kvargs_process(const struct rte_kvargs *kvlist,
 
        for (i = 0; i < kvlist->count; i++) {
                pair = &kvlist->pairs[i];
-               if (strstr(pair->key, key_match) != NULL) {
+               if (strcmp(pair->key, key_match) == 0) {
                        if ((*handler)(pair->value, opaque_arg) < 0)
                                return -1;
                }