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| author | Harsha Sharma <harshasharmaiitr@gmail.com> | 2017-11-24 00:25:14 +0530 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2017-11-27 23:54:13 +0100 |
| commit | 39d453a15dd3e1a349edc5618861aad63991419a (patch) | |
| tree | 0c8f74bb22dbd7299546ee8e78a7229bbba1bb03 | |
| parent | fc6c7287f7ed7f005a226856ed93bcd1475f208c (diff) | |
evaluate: print error for null string
Print error "Empty string is not allowed", eg.
# nft add rule filter input meta iifname '""'
add rule filter input meta iifname ""
^^
Error: Empty String is not allowed
Signed-off-by: Harsha Sharma <harshasharmaiitr@gmail.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| -rw-r--r-- | src/evaluate.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/src/evaluate.c b/src/evaluate.c index b0ce9f63..758e7bbe 100644 --- a/src/evaluate.c +++ b/src/evaluate.c @@ -235,7 +235,10 @@ static int expr_evaluate_string(struct eval_ctx *ctx, struct expr **exprp) memset(data + len, 0, data_len - len); mpz_export_data(data, expr->value, BYTEORDER_HOST_ENDIAN, len); - assert(strlen(data) > 0); + if (strlen(data) == 0) + return expr_error(ctx->msgs, expr, + "Empty string is not allowed"); + datalen = strlen(data) - 1; if (data[datalen] != '*') { /* We need to reallocate the constant expression with the right |